Update changelog for release v0.34.17

Bumps [github.com/spf13/cobra](https://github.com/spf13/cobra) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/spf13/cobra/releases)
- [Changelog](https://github.com/spf13/cobra/blob/master/CHANGELOG.md)
- [Commits](https://github.com/spf13/cobra/compare/v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: github.com/spf13/cobra
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.circleci/config.yml

@@ -1,393 +1,168 @@
-version: 2
+version: 2.1
 
-defaults: &defaults
-  working_directory: /go/src/github.com/tendermint/tendermint
-  docker:
-    - image: circleci/golang:1.11.4
-  environment:
-    GOBIN: /tmp/workspace/bin
-
-docs_update_config: &docs_update_config
-  working_directory: ~/repo
-  docker:
-    - image: tendermint/docs_deployment
-  environment:
-    AWS_REGION: us-east-1
+executors:
+  golang:
+    docker:
+      - image: tendermintdev/docker-tendermint-build
+    working_directory: /go/src/github.com/tendermint/tendermint
+    environment:
+      GOBIN: /tmp/bin
+  release:
+    machine: true
+  docs:
+    docker:
+      - image: tendermintdev/docker-website-deployment
+    environment:
+      AWS_REGION: us-east-1
 
+commands:
+  run_test:
+    parameters:
+      script_path:
+        type: string
+    steps:
+      - attach_workspace:
+          at: /tmp/bin
+      - restore_cache:
+          name: "Restore source code cache"
+          keys:
+            - go-src-v1-{{ .Revision }}
+      - checkout
+      - restore_cache:
+          name: "Restore go modules cache"
+          keys:
+            - go-mod-v1-{{ checksum "go.sum" }}
+      - run:
+          name: "Running test"
+          command: |
+            bash << parameters.script_path >>
 jobs:
   setup_dependencies:
-    <<: *defaults
+    executor: golang
     steps:
-      - run: mkdir -p /tmp/workspace/bin
-      - run: mkdir -p /tmp/workspace/profiles
       - checkout
       - restore_cache:
+          name: "Restore go modules cache"
           keys:
-            - v3-pkg-cache
+            - go-mod-v1-{{ checksum "go.sum" }}
+      - run:
+          command: |
+            mkdir -p /tmp/bin
+      - run:
+          name: Cache go modules
+          command: make go-mod-cache
       - run:
           name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
+          command: make tools
       - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run:
-          name: binaries
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make install install_abci
-      - persist_to_workspace:
-          root: /tmp/workspace
-          paths:
-            - bin
-            - profiles
+          name: "Build binaries"
+          command: make install install_abci
       - save_cache:
-          key: v3-pkg-cache
+          name: "Save go modules cache"
+          key: go-mod-v1-{{ checksum "go.sum" }}
           paths:
-            - /go/pkg
-      # - save_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      #     paths:
-      #       - /go/src/github.com/tendermint/tendermint
-
-  build_slate:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      - restore_cache:
-          key: v3-pkg-cache
-      # https://discuss.circleci.com/t/saving-cache-stopped-working-warning-skipping-this-step-disabled-in-configuration/24423/2
-      # - restore_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      - checkout
-      - run:
-          name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
-      - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-
-      - run:
-          name: slate docs
-          command: |
-            set -ex
-            export PATH="$GOBIN:$PATH"
-            make build-slate
-
-  lint:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      - restore_cache:
-          key: v3-pkg-cache
-      # - restore_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      - checkout
-      - run:
-          name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
-            make get_dev_tools
-      - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-
-      - run:
-          name: metalinter
-          command: |
-            set -ex
-            export PATH="$GOBIN:$PATH"
-            make metalinter
-      - run:
-          name: check_dep
-          command: |
-            set -ex
-            export PATH="$GOBIN:$PATH"
-            make check_dep
-
-  test_abci_apps:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      - restore_cache:
-          key: v3-pkg-cache
-      # - restore_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      - checkout
-      - run:
-          name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
-      - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-
-      - run:
-          name: Run abci apps tests
-          command: |
-            export PATH="$GOBIN:$PATH"
-            bash abci/tests/test_app/test.sh
-
-# if this test fails, fix it and update the docs at:
-# https://github.com/tendermint/tendermint/blob/develop/docs/abci-cli.md
-  test_abci_cli:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      - restore_cache:
-          key: v3-pkg-cache
-      # - restore_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      - checkout
-      - run:
-          name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
-      - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-
-      - run:
-          name: Run abci-cli tests
-          command: |
-            export PATH="$GOBIN:$PATH"
-            bash abci/tests/test_cli/test.sh
-
-  test_apps:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      - restore_cache:
-          key: v3-pkg-cache
-      # - restore_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      - checkout
-      - run:
-          name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
-      - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-
-      - run: sudo apt-get update && sudo apt-get install -y --no-install-recommends bsdmainutils
-      - run:
-          name: Run tests
-          command: bash test/app/test.sh
-
-  test_cover:
-    <<: *defaults
-    parallelism: 4
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      - restore_cache:
-          key: v3-pkg-cache
-      # - restore_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      - checkout
-      - run:
-          name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
-      - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-
-      - run: mkdir -p /tmp/logs
-      - run:
-          name: Run tests
-          command: |
-            for pkg in $(go list github.com/tendermint/tendermint/... | circleci tests split --split-by=timings); do
-              id=$(basename "$pkg")
-
-              GOCACHE=off go test -timeout 5m -race -coverprofile=/tmp/workspace/profiles/$id.out -covermode=atomic "$pkg" | tee "/tmp/logs/$id-$RANDOM.log"
-            done
+            - "/go/pkg/mod"
+      - save_cache:
+          name: "Save source code cache"
+          key: go-src-v1-{{ .Revision }}
+          paths:
+            - ".git"
       - persist_to_workspace:
-          root: /tmp/workspace
+          root: "/tmp/bin"
           paths:
-            - "profiles/*"
-      - store_artifacts:
-          path: /tmp/logs
-
-  test_persistence:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      - restore_cache:
-          key: v3-pkg-cache
-      # - restore_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      - checkout
-      - run:
-          name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
-      - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-
-      - run:
-          name: Run tests
-          command: bash test/persist/test_failure_indices.sh
-
-  localnet:
-      working_directory: /home/circleci/.go_workspace/src/github.com/tendermint/tendermint
-      machine:
-        image: circleci/classic:latest
-      environment:
-        GOBIN: /home/circleci/.go_workspace/bin
-        GOPATH: /home/circleci/.go_workspace/
-        GOOS: linux
-        GOARCH: amd64
-      parallelism: 1
-      steps:
-        - checkout
-        - run:
-            name: run localnet and exit on failure
-            command: |
-              set -x
-              make get_tools
-              make get_vendor_deps
-              make build-linux
-              make localnet-start &
-              ./scripts/localnet-blocks-test.sh 40 5 10 localhost
-
-  test_p2p:
-    environment:
-      GOBIN: /home/circleci/.go_workspace/bin
-      GOPATH: /home/circleci/.go_workspace
-    machine:
-      image: circleci/classic:latest
-    steps:
-      - checkout
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-      - run: bash test/p2p/circleci.sh
-      - store_artifacts:
-          path: /home/circleci/project/test/p2p/logs
-
-  upload_coverage:
-    <<: *defaults
-    steps:
-      - attach_workspace:
-          at: /tmp/workspace
-      # - restore_cache:
-      #     key: v3-tree-{{ .Environment.CIRCLE_SHA1 }}
-      - checkout
-      - run:
-          name: tools
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_tools
-      - run:
-          name: dependencies
-          command: |
-            export PATH="$GOBIN:$PATH"
-            make get_vendor_deps
-      - run: mkdir -p $GOPATH/src/github.com/tendermint
-      - run: ln -sf /home/circleci/project $GOPATH/src/github.com/tendermint/tendermint
-
-      - run:
-          name: gather
-          command: |
-            set -ex
-
-            echo "mode: atomic" > coverage.txt
-            for prof in $(ls /tmp/workspace/profiles/); do
-              tail -n +2 /tmp/workspace/profiles/"$prof" >> coverage.txt
-            done
-      - run:
-          name: upload
-          command: bash .circleci/codecov.sh -f coverage.txt
+            - "."
 
   deploy_docs:
-    <<: *docs_update_config
+    executor: docs
     steps:
       - checkout
       - run:
-          name: Trigger website build
+          name: "Pull versions"
+          command: git fetch origin v0.32 v0.33
+      - run:
+          name: "Build docs"
+          command: make build-docs
+      - run:
+          name: "Sync to S3"
+          command: make sync-docs
+
+  prepare_build:
+    executor: golang
+    steps:
+      - restore_cache:
+          name: "Restore source code cache"
+          keys:
+            - go-src-v1-{{ .Revision }}
+      - checkout
+      - run:
+          name: Get next release number
           command: |
-            chamber exec tendermint -- start_website_build
+            export LAST_TAG="`git describe --tags --abbrev=0 --match "${CIRCLE_BRANCH}.*"`"
+            echo "Last tag: ${LAST_TAG}"
+            if [ -z "${LAST_TAG}" ]; then
+              export LAST_TAG="${CIRCLE_BRANCH}"
+              echo "Last tag not found. Possibly fresh branch or feature branch. Setting ${LAST_TAG} as tag."
+            fi
+            export NEXT_TAG="`python -u scripts/release_management/bump-semver.py --version "${LAST_TAG}"`"
+            echo "Next tag: ${NEXT_TAG}"
+            echo "export CIRCLE_TAG=\"${NEXT_TAG}\"" > release-version.source
+      - run:
+          name: Build dependencies
+          command: make tools
+      - persist_to_workspace:
+          root: .
+          paths:
+            - "release-version.source"
+      - save_cache:
+          key: v2-release-deps-{{ checksum "go.sum" }}
+          paths:
+            - "/go/pkg/mod"
+
+  # # Test RPC implementation against the swagger documented specs
+  # contract_tests:
+  #   working_directory: /home/circleci/.go_workspace/src/github.com/tendermint/tendermint
+  #   machine:
+  #     image: circleci/classic:latest
+  #   environment:
+  #     GOBIN: /home/circleci/.go_workspace/bin
+  #     GOPATH: /home/circleci/.go_workspace/
+  #     GOOS: linux
+  #     GOARCH: amd64
+  #   parallelism: 1
+  #   steps:
+  #     - checkout
+  #     - run:
+  #         name: Test RPC endpoints against swagger documentation
+  #         command: |
+  #           set -x
+  #           export PATH=~/.local/bin:$PATH
+  #           # install node and dredd
+  #           ./scripts/get_nodejs.sh
+  #           # build the binaries with a proper version of Go
+  #           docker run --rm -v "$PWD":/go/src/github.com/tendermint/tendermint -w /go/src/github.com/tendermint/tendermint golang make build-linux build-contract-tests-hooks
+  #           # This docker image works with go 1.7, we can install here the hook handler that contract-tests is going to use
+  #           go get github.com/snikch/goodman/cmd/goodman
+  #           make contract-tests
 
 workflows:
   version: 2
-  test-suite:
+  docs:
     jobs:
       - deploy_docs:
+          context: tendermint-docs
           filters:
             branches:
               only:
                 - master
-                - develop
-      - setup_dependencies
-      - lint:
-          requires:
-            - setup_dependencies
-      - test_abci_apps:
-          requires:
-            - setup_dependencies
-      - test_abci_cli:
-          requires:
-            - setup_dependencies
-      - test_apps:
-          requires:
-            - setup_dependencies
-      - test_cover:
-          requires:
-            - setup_dependencies
-      - test_persistence:
-          requires:
-            - setup_dependencies
-      - localnet:
-          requires:
-            - setup_dependencies
-      - test_p2p
-      - upload_coverage:
-          requires:
-            - test_cover
+            tags:
+              only:
+                - /^v.*/
+      - deploy_docs:
+          context: tendermint-docs-staging
+          filters:
+            branches:
+              only:
+                - docs-staging
+      # - contract_tests:
+      #     requires:
+      #       - setup_dependencies

.clang-format

@@ -0,0 +1,11 @@
+---
+Language: Proto
+BasedOnStyle: Google
+IndentWidth: 2
+ColumnLimit: 0
+AlignConsecutiveAssignments: true
+AlignConsecutiveDeclarations: true
+SpacesInSquareBrackets: true
+ReflowComments:  true
+SortIncludes:    true
+SortUsingDeclarations: true

.dockerignore

@@ -0,0 +1,5 @@
+build
+test/e2e/build
+test/e2e/networks
+test/logs
+test/p2p/data

.github/CODEOWNERS

@@ -1,7 +1,10 @@
 # CODEOWNERS: https://help.github.com/articles/about-codeowners/
 
-# Everything goes through Bucky, Anton, Alex. For now.
-*       @ebuchman @melekes @xla
-
-# Precious documentation
-/docs/  @zramsay
+# Everything goes through the following "global owners" by default.
+# Unless a later match takes precedence, these three will be
+# requested for review when someone opens a PR.
+# Note that the last matching pattern takes precedence, so
+# global owners are only requested if there isn't a more specific
+# codeowner specified below. For this reason, the global codeowners
+# are often repeated in package-level definitions.
+*      @ebuchman @cmwaters @tychoish @williambanfield @creachadair

.github/ISSUE_TEMPLATE/bug-report.md

@@ -37,6 +37,6 @@ manner. We might ask you to provide additional logs and data (tendermint & app).
 
 **node command runtime flags**:
 
-**`/dump_consensus_state` output for consensus bugs**
+**Please provide the output from the `http://<ip>:<port>/dump_consensus_state` RPC endpoint for consensus bugs**
 
 **Anything else we need to know**:

.github/ISSUE_TEMPLATE/feature-request.md

@@ -3,11 +3,34 @@ name: Feature Request
 about: Create a proposal to request a feature
 
 ---
-<!--
-Please describe *in detail* the feature/behavior/change you'd like to see.
 
-Be ready for followup questions, and please respond in a timely
-manner. 
+<!-- < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < < ☺ 
+v                            ✰  Thanks for opening an issue! ✰    
+v    Before smashing the submit button please review the template.
+v    Word of caution: poorly thought-out proposals may be rejected 
+v                     without deliberation 
+☺ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >  -->
 
-Word of caution: poorly thought out proposals may be rejected without deliberation 
--->
+## Summary
+
+<!-- Short, concise description of the proposed feature -->
+
+## Problem Definition
+
+<!-- Why do we need this feature? 
+What problems may be addressed by introducing this feature?
+What benefits does Tendermint stand to gain by including this feature?
+Are there any disadvantages of including this feature? -->
+
+## Proposal
+
+<!-- Detailed description of requirements of implementation -->
+
+____
+
+#### For Admin Use
+
+- [ ] Not duplicate issue
+- [ ] Appropriate labels applied
+- [ ] Appropriate contributors tagged
+- [ ] Contributor assigned/self-assigned

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,7 @@
-<!-- Thanks for filing a PR! Before hitting the button, please check the following items.-->
+## Description
+
+_Please add a description of the changes that this PR introduces and the files that
+are the most critical to review._ 
+
+Closes: #XXX
 
-* [ ] Updated all relevant documentation in docs
-* [ ] Updated all code comments where relevant
-* [ ] Wrote tests
-* [ ] Updated CHANGELOG_PENDING.md

.github/auto-comment.yml

@@ -0,0 +1,16 @@
+pullRequestOpened: |
+  :wave: Thanks for creating a PR!   
+
+  Before we can merge this PR, please make sure that all the following items have been 
+  checked off. If any of the checklist items are not applicable, please leave them but
+  write a little note why.   
+
+  - [ ] Wrote tests  
+  - [ ] Updated CHANGELOG_PENDING.md   
+  - [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.  
+  - [ ] Updated relevant documentation (`docs/`) and code comments  
+  - [ ] Re-reviewed `Files changed` in the Github PR explorer  
+  - [ ] Applied Appropriate Labels  
+
+
+  Thank you for your contribution to Tendermint! :rocket:   

.github/dependabot.yml

@@ -0,0 +1,27 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: daily
+      time: "11:00"
+    open-pull-requests-limit: 10
+  - package-ecosystem: npm
+    directory: "/docs"
+    schedule:
+      interval: daily
+      time: "11:00"
+    open-pull-requests-limit: 10
+    reviewers:
+      - fadeev
+  - package-ecosystem: gomod
+    directory: "/"
+    schedule:
+      interval: daily
+      time: "11:00"
+    open-pull-requests-limit: 10
+    reviewers:
+      - melekes
+      - tessr
+    labels:
+      - T:dependencies

.github/mergify.yml

@@ -0,0 +1,19 @@
+queue_rules:
+  - name: default
+    conditions:
+      - base=v0.34.x
+      - label=S:automerge
+
+pull_request_rules:
+  - name: Automerge to v0.34.x
+    conditions:
+      - base=v0.34.x
+      - label=S:automerge
+    actions:
+      queue:
+        method: squash
+        name: default
+        commit_message_template: |
+          {{ title }} (#{{ number }})
+
+          {{ body }}

.github/workflows/coverage.yml

@@ -0,0 +1,123 @@
+name: Test Coverage
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - release/**
+
+jobs:
+  split-test-files:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Create a file with all the pkgs
+        run: go list ./... > pkgs.txt
+      - name: Split pkgs into 4 files
+        run: split -d -n l/4 pkgs.txt pkgs.txt.part.
+      # cache multiple
+      - uses: actions/upload-artifact@v2
+        with:
+          name: "${{ github.sha }}-00"
+          path: ./pkgs.txt.part.00
+      - uses: actions/upload-artifact@v2
+        with:
+          name: "${{ github.sha }}-01"
+          path: ./pkgs.txt.part.01
+      - uses: actions/upload-artifact@v2
+        with:
+          name: "${{ github.sha }}-02"
+          path: ./pkgs.txt.part.02
+      - uses: actions/upload-artifact@v2
+        with:
+          name: "${{ github.sha }}-03"
+          path: ./pkgs.txt.part.03
+
+  build-linux:
+    name: Build
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        goarch: ["arm", "amd64"]
+    timeout-minutes: 5
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "^1.15.4"
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v4
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - name: install
+        run: GOOS=linux GOARCH=${{ matrix.goarch }} make build
+        if: "env.GIT_DIFF != ''"
+
+  tests:
+    runs-on: ubuntu-latest
+    needs: split-test-files
+    strategy:
+      fail-fast: false
+      matrix:
+        part: ["00", "01", "02", "03"]
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "^1.15.4"
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v4
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - uses: actions/download-artifact@v2
+        with:
+          name: "${{ github.sha }}-${{ matrix.part }}"
+        if: env.GIT_DIFF
+      - name: test & coverage report creation
+        run: |
+          cat pkgs.txt.part.${{ matrix.part }} | xargs go test -mod=readonly -timeout 8m -race -coverprofile=${{ matrix.part }}profile.out -covermode=atomic
+        if: env.GIT_DIFF
+      - uses: actions/upload-artifact@v2
+        with:
+          name: "${{ github.sha }}-${{ matrix.part }}-coverage"
+          path: ./${{ matrix.part }}profile.out
+
+  upload-coverage-report:
+    runs-on: ubuntu-latest
+    needs: tests
+    steps:
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v4
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - uses: actions/download-artifact@v2
+        with:
+          name: "${{ github.sha }}-00-coverage"
+        if: env.GIT_DIFF
+      - uses: actions/download-artifact@v2
+        with:
+          name: "${{ github.sha }}-01-coverage"
+        if: env.GIT_DIFF
+      - uses: actions/download-artifact@v2
+        with:
+          name: "${{ github.sha }}-02-coverage"
+        if: env.GIT_DIFF
+      - uses: actions/download-artifact@v2
+        with:
+          name: "${{ github.sha }}-03-coverage"
+        if: env.GIT_DIFF
+      - run: |
+          cat ./*profile.out | grep -v "mode: atomic" >> coverage.txt
+        if: env.GIT_DIFF
+      - uses: codecov/codecov-action@v1.0.13
+        with:
+          file: ./coverage.txt
+        if: env.GIT_DIFF

.github/workflows/docker.yml

@@ -0,0 +1,59 @@
+name: Build & Push
+#  Build & Push rebuilds the tendermint docker image on every push to master and creation of tags
+# and pushes the image to https://hub.docker.com/r/interchainio/simapp/tags
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+" # Push events to matching v*, i.e. v1.0, v20.15.10
+      - "v[0-9]+.[0-9]+.[0-9]+-rc*" # Push events to matching v*, i.e. v1.0-rc1, v20.15.10-rc5
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Prepare
+        id: prep
+        run: |
+          DOCKER_IMAGE=tendermint/tendermint
+          VERSION=noop
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+          elif [[ $GITHUB_REF == refs/heads/* ]]; then
+            VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
+            if [ "${{ github.event.repository.default_branch }}" = "$VERSION" ]; then
+              VERSION=latest
+            fi
+          fi
+          TAGS="${DOCKER_IMAGE}:${VERSION}"
+          if [[ $VERSION =~ ^v[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
+            TAGS="$TAGS,${DOCKER_IMAGE}:${VERSION}"
+          fi
+          echo ::set-output name=tags::${TAGS}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@master
+        with:
+          platforms: all
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to DockerHub
+        if: ${{ github.event_name != 'pull_request' }}
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Publish to Docker Hub
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./DOCKER/Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.prep.outputs.tags }}

.github/workflows/e2e-manual.yml

@@ -0,0 +1,35 @@
+# Manually run randomly generated E2E testnets (as nightly).
+name: e2e-manual
+on:
+  workflow_dispatch:
+
+jobs:
+  e2e-nightly-test:
+    # Run parallel jobs for the listed testnet groups (must match the
+    # ./build/generator -g flag)
+    strategy:
+      fail-fast: false
+      matrix:
+        group: ['00', '01', '02', '03']
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '1.17'
+
+      - uses: actions/checkout@v2.4.0
+
+      - name: Build
+        working-directory: test/e2e
+        # Run make jobs in parallel, since we can't run steps in parallel.
+        run: make -j2 docker generator runner tests
+
+      - name: Generate testnets
+        working-directory: test/e2e
+        # When changing -g, also change the matrix groups above
+        run: ./build/generator -g 4 -d networks/nightly/
+
+      - name: Run ${{ matrix.p2p }} p2p testnets
+        working-directory: test/e2e
+        run: ./run-multiple.sh networks/nightly/*-group${{ matrix.group }}-*.toml

.github/workflows/e2e-nightly-34x.yml

@@ -0,0 +1,76 @@
+# Runs randomly generated E2E testnets nightly
+# on the 0.34.x release branch
+
+# !! If you change something in this file, you probably want
+# to update the e2e-nightly-master workflow as well!
+
+name: e2e-nightly-34x
+on:
+  workflow_dispatch: # allow running workflow manually, in theory
+  schedule:
+    - cron: '0 2 * * *'
+
+jobs:
+  e2e-nightly-test:
+    # Run parallel jobs for the listed testnet groups (must match the
+    # ./build/generator -g flag)
+    strategy:
+      fail-fast: false
+      matrix:
+        group: ['00', '01', '02', '03']
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '^1.15.4'
+
+      - uses: actions/checkout@v2
+        with:
+          ref: 'v0.34.x'
+
+      - name: Build
+        working-directory: test/e2e
+        # Run make jobs in parallel, since we can't run steps in parallel.
+        run: make -j2 docker generator runner
+
+      - name: Generate testnets
+        working-directory: test/e2e
+        # When changing -g, also change the matrix groups above
+        run: ./build/generator -g 4 -d networks/nightly
+
+      - name: Run testnets in group ${{ matrix.group }}
+        working-directory: test/e2e
+        run: ./run-multiple.sh networks/nightly/*-group${{ matrix.group }}-*.toml
+
+  e2e-nightly-fail:
+    needs: e2e-nightly-test
+    if: ${{ failure() }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify Slack on failure
+        uses: rtCamp/action-slack-notify@e9db0ef
+        env:
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+          SLACK_CHANNEL: tendermint-internal
+          SLACK_USERNAME: Nightly E2E Tests
+          SLACK_ICON_EMOJI: ':skull:'
+          SLACK_COLOR: danger
+          SLACK_MESSAGE: Nightly E2E tests failed on v0.34.x
+          SLACK_FOOTER: ''
+
+  e2e-nightly-success: # may turn this off once they seem to pass consistently
+    needs: e2e-nightly-test
+    if: ${{ success() }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify Slack on success
+        uses: rtCamp/action-slack-notify@ae4223259071871559b6e9d08b24a63d71b3f0c0
+        env:
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+          SLACK_CHANNEL: tendermint-internal
+          SLACK_USERNAME: Nightly E2E Tests
+          SLACK_ICON_EMOJI: ':white_check_mark:'
+          SLACK_COLOR: good
+          SLACK_MESSAGE: Nightly E2E tests passed on v0.34.x
+          SLACK_FOOTER: ''

.github/workflows/e2e-nightly-master.yml

@@ -0,0 +1,73 @@
+# Runs randomly generated E2E testnets nightly on master
+
+# !! If you change something in this file, you probably want
+# to update the e2e-nightly-34x workflow as well!
+
+name: e2e-nightly-master
+on:
+  workflow_dispatch: # allow running workflow manually
+  schedule:
+    - cron: '0 2 * * *'
+
+jobs:
+  e2e-nightly-test-2:
+    # Run parallel jobs for the listed testnet groups (must match the
+    # ./build/generator -g flag)
+    strategy:
+      fail-fast: false
+      matrix:
+        group: ['00', '01', '02', '03']
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '1.15'
+
+      - uses: actions/checkout@v2
+
+      - name: Build
+        working-directory: test/e2e
+        # Run make jobs in parallel, since we can't run steps in parallel.
+        run: make -j2 docker generator runner
+
+      - name: Generate testnets
+        working-directory: test/e2e
+        # When changing -g, also change the matrix groups above
+        run: ./build/generator -g 4 -d networks/nightly
+
+      - name: Run testnets in group ${{ matrix.group }}
+        working-directory: test/e2e
+        run: ./run-multiple.sh networks/nightly/*-group${{ matrix.group }}-*.toml
+
+  e2e-nightly-fail-2:
+    needs: e2e-nightly-test-2
+    if: ${{ failure() }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify Slack on failure
+        uses: rtCamp/action-slack-notify@ae4223259071871559b6e9d08b24a63d71b3f0c0
+        env:
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+          SLACK_CHANNEL: tendermint-internal
+          SLACK_USERNAME: Nightly E2E Tests
+          SLACK_ICON_EMOJI: ':skull:'
+          SLACK_COLOR: danger
+          SLACK_MESSAGE: Nightly E2E tests failed on master
+          SLACK_FOOTER: ''
+
+  e2e-nightly-success: # may turn this off once they seem to pass consistently
+    needs: e2e-nightly-test-2
+    if: ${{ success() }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify Slack on success
+        uses: rtCamp/action-slack-notify@ae4223259071871559b6e9d08b24a63d71b3f0c0
+        env:
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+          SLACK_CHANNEL: tendermint-internal
+          SLACK_USERNAME: Nightly E2E Tests
+          SLACK_ICON_EMOJI: ':white_check_mark:'
+          SLACK_COLOR: good
+          SLACK_MESSAGE: Nightly E2E tests passed on master
+          SLACK_FOOTER: ''

.github/workflows/e2e.yml

@@ -0,0 +1,41 @@
+name: e2e
+# Runs the CI end-to-end test network on all pushes to master or release branches
+# and every pull request, but only if any Go files have been changed.
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - release/**
+
+jobs:
+  e2e-test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '^1.15.4'
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v4
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+
+      - name: Build
+        working-directory: test/e2e
+        # Run two make jobs in parallel, since we can't run steps in parallel.
+        run: make -j2 docker runner
+        if: "env.GIT_DIFF != ''"
+
+      - name: Run CI testnet
+        working-directory: test/e2e
+        run: ./build/runner -f networks/ci.toml
+        if: "env.GIT_DIFF != ''"
+
+      - name: Emit logs on failure
+        if: ${{ failure() }}
+        working-directory: test/e2e
+        run: ./build/runner -f networks/ci.toml logs

.github/workflows/fuzz-nightly.yml

@@ -0,0 +1,83 @@
+# Runs fuzzing nightly.
+name: fuzz-nightly
+on:
+  workflow_dispatch: # allow running workflow manually
+  schedule:
+    - cron: '0 3 * * *'
+
+jobs:
+  fuzz-nightly-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '1.15'
+
+      - uses: actions/checkout@v2
+
+      - name: Install go-fuzz
+        working-directory: test/fuzz
+        run: go get -u github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-build
+
+      - name: Fuzz mempool
+        working-directory: test/fuzz
+        run: timeout -s SIGINT --preserve-status 10m make fuzz-mempool
+        continue-on-error: true
+
+      - name: Fuzz p2p-addrbook
+        working-directory: test/fuzz
+        run: timeout -s SIGINT --preserve-status 10m make fuzz-p2p-addrbook
+        continue-on-error: true
+
+      - name: Fuzz p2p-pex
+        working-directory: test/fuzz
+        run: timeout -s SIGINT --preserve-status 10m make fuzz-p2p-pex
+        continue-on-error: true
+
+      - name: Fuzz p2p-sc
+        working-directory: test/fuzz
+        run: timeout -s SIGINT --preserve-status 10m make fuzz-p2p-sc
+        continue-on-error: true
+
+      - name: Fuzz p2p-rpc-server
+        working-directory: test/fuzz
+        run: timeout -s SIGINT --preserve-status 10m make fuzz-rpc-server
+        continue-on-error: true
+
+      - name: Archive crashers
+        uses: actions/upload-artifact@v2
+        with:
+          name: crashers
+          path: test/fuzz/**/crashers
+          retention-days: 1
+
+      - name: Archive suppressions
+        uses: actions/upload-artifact@v2
+        with:
+          name: suppressions
+          path: test/fuzz/**/suppressions
+          retention-days: 1
+
+      - name: Set crashers count
+        working-directory: test/fuzz
+        run: echo "::set-output name=count::$(find . -type d -name 'crashers' | xargs -I % sh -c 'ls % | wc -l' | awk '{total += $1} END {print total}')"
+        id: set-crashers-count
+
+    outputs:
+      crashers-count: ${{ steps.set-crashers-count.outputs.count }}
+
+  fuzz-nightly-fail:
+    needs: fuzz-nightly-test
+    if: ${{ needs.fuzz-nightly-test.outputs.crashers-count != 0 }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify Slack if any crashers
+        uses: rtCamp/action-slack-notify@ae4223259071871559b6e9d08b24a63d71b3f0c0
+        env:
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
+          SLACK_CHANNEL: tendermint-internal
+          SLACK_USERNAME: Nightly Fuzz Tests
+          SLACK_ICON_EMOJI: ':firecracker:'
+          SLACK_COLOR: danger
+          SLACK_MESSAGE: Crashers found in Nightly Fuzz tests
+          SLACK_FOOTER: ''

.github/workflows/linkchecker.yml

@@ -0,0 +1,12 @@
+name: Check Markdown links
+on: 
+  schedule:
+    - cron: '* */24 * * *'
+jobs:
+  markdown-link-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - uses: gaurav-nelson/github-action-markdown-link-check@1.0.7
+        with:
+          folder-path: "docs"

.github/workflows/lint.yml

@@ -0,0 +1,29 @@
+name: Lint
+# Lint runs golangci-lint over the entire Tendermint repository
+# This workflow is run on every pull request and push to master
+# The `golangci` job will pass without running if no *.{go, mod, sum} files have been modified.
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+jobs:
+  golangci:
+    name: golangci-lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 8
+    steps:
+      - uses: actions/checkout@v2.4.0
+      - uses: technote-space/get-diff-action@v5
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - uses: golangci/golangci-lint-action@v2.5.2
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.42.1
+          args: --timeout 10m
+          github-token: ${{ secrets.github_token }}
+        if: env.GIT_DIFF

.github/workflows/linter.yml

@@ -0,0 +1,32 @@
+name: Lint
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - "**.md"
+      - "**.yml"
+      - "**.yaml"
+  pull_request:
+    branches: [master]
+    paths:
+      - "**.md"
+      - "**.yml"
+
+jobs:
+  build:
+    name: Super linter
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v2.4.0
+      - name: Lint Code Base
+        uses: docker://github/super-linter:v3
+        env:
+          LINTER_RULES_PATH: .
+          VALIDATE_ALL_CODEBASE: true
+          DEFAULT_BRANCH: master
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VALIDATE_MD: true
+          VALIDATE_OPENAPI: true
+          VALIDATE_YAML: true

.github/workflows/proto-docker.yml

@@ -0,0 +1,51 @@
+name: Build & Push TM Proto Builder
+on:
+  pull_request:
+    paths:
+      - "tools/proto/*"
+  push:
+    branches:
+      - master
+    paths:
+      - "tools/proto/*"
+  schedule:
+    # run this job once a month to recieve any go or buf updates
+    - cron: "* * 1 * *"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Prepare
+        id: prep
+        run: |
+          DOCKER_IMAGE=tendermintdev/docker-build-proto
+          VERSION=noop
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+          elif [[ $GITHUB_REF == refs/heads/* ]]; then
+            VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
+            if [ "${{ github.event.repository.default_branch }}" = "$VERSION" ]; then
+              VERSION=latest
+            fi
+          fi
+          TAGS="${DOCKER_IMAGE}:${VERSION}"
+          echo ::set-output name=tags::${TAGS}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Publish to Docker Hub
+        uses: docker/build-push-action@v2
+        with:
+          context: ./tools/proto
+          file: ./tools/proto/Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.prep.outputs.tags }}

.github/workflows/proto.yml

@@ -0,0 +1,22 @@
+name: Protobuf
+# Protobuf runs buf (https://buf.build/) lint and check-breakage
+# This workflow is only run when a .proto file has been modified
+on:
+  pull_request:
+    paths:
+      - "**.proto"
+jobs:
+  proto-lint:
+    runs-on: ubuntu-latest
+    timeout-minutes: 4
+    steps:
+      - uses: actions/checkout@master
+      - name: lint
+        run: make proto-lint
+  proto-breakage:
+    runs-on: ubuntu-latest
+    timeout-minutes: 4
+    steps:
+      - uses: actions/checkout@master
+      - name: check-breakage
+        run: make proto-check-breaking-ci

.github/workflows/release.yml

@@ -0,0 +1,29 @@
+name: "Release"
+
+on:
+  push:
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+" # Push events to matching v*, i.e. v1.0, v20.15.10
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '^1.15.4'
+
+      - run: echo https://github.com/tendermint/tendermint/blob/${GITHUB_REF#refs/tags/}/CHANGELOG.md#${GITHUB_REF#refs/tags/} > ../release_notes.md 
+
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v2
+        with:
+          version: latest
+          args: release --rm-dist --release-notes=../release_notes.md
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/stale.yml

@@ -0,0 +1,18 @@
+name: "Close stale pull requests"
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          stale-pr-message: "This pull request has been automatically marked as stale because it has not had
+    recent activity. It will be closed if no further activity occurs. Thank you
+    for your contributions."
+          days-before-stale: 10
+          days-before-close: 4
+          exempt-pr-labels: "S:wip"

.github/workflows/tests.yml

@@ -0,0 +1,146 @@
+name: Tests
+# Tests runs different tests (test_abci_apps, test_abci_cli, test_apps)
+# This workflow runs on every push to master or release branch and  every pull requests
+# All jobs will pass without running if no *{.go, .mod, .sum} files have been modified
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - release/**
+
+jobs:
+  cleanup-runs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: rokroskar/workflow-run-cleanup-action@master
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+    if: "!startsWith(github.ref, 'refs/tags/') && github.ref != 'refs/heads/master'"
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "^1.15.4"
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v4
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - name: install
+        run: make install install_abci
+        if: "env.GIT_DIFF != ''"
+      - uses: actions/cache@v2.1.4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+        if: env.GIT_DIFF
+      # Cache binaries for use by other jobs
+      - uses: actions/cache@v2.1.4
+        with:
+          path: ~/go/bin
+          key: ${{ runner.os }}-${{ github.sha }}-tm-binary
+        if: env.GIT_DIFF
+
+  test_abci_apps:
+    runs-on: ubuntu-latest
+    needs: build
+    timeout-minutes: 5
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "^1.15.4"
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v4
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - uses: actions/cache@v2.1.4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+        if: env.GIT_DIFF
+      - uses: actions/cache@v2.1.4
+        with:
+          path: ~/go/bin
+          key: ${{ runner.os }}-${{ github.sha }}-tm-binary
+        if: env.GIT_DIFF
+      - name: test_abci_apps
+        run: abci/tests/test_app/test.sh
+        shell: bash
+        if: env.GIT_DIFF
+
+  test_abci_cli:
+    runs-on: ubuntu-latest
+    needs: build
+    timeout-minutes: 5
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "^1.15.4"
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v4
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - uses: actions/cache@v2.1.4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+        if: env.GIT_DIFF
+      - uses: actions/cache@v2.1.4
+        with:
+          path: ~/go/bin
+          key: ${{ runner.os }}-${{ github.sha }}-tm-binary
+        if: env.GIT_DIFF
+      - run: abci/tests/test_cli/test.sh
+        shell: bash
+        if: env.GIT_DIFF
+
+  test_apps:
+    runs-on: ubuntu-latest
+    needs: build
+    timeout-minutes: 5
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "^1.15.4"
+      - uses: actions/checkout@v2
+      - uses: technote-space/get-diff-action@v4
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - uses: actions/cache@v2.1.4
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+        if: env.GIT_DIFF
+      - uses: actions/cache@v2.1.4
+        with:
+          path: ~/go/bin
+          key: ${{ runner.os }}-${{ github.sha }}-tm-binary
+        if: env.GIT_DIFF
+      - name: test_apps
+        run: test/app/test.sh
+        shell: bash
+        if: env.GIT_DIFF

.gitignore

@@ -10,11 +10,15 @@ remote_dump
 .revision
 vendor
 .vagrant
+test/e2e/build
+test/maverick/maverick
+test/e2e/networks/*/
 test/p2p/data/
 test/logs
 coverage.txt
 docs/_build
 docs/dist
+docs/.vuepress/dist
 *.log
 abci-cli
 docs/node_modules/
@@ -35,10 +39,20 @@ shunit2
 addrbook.json
 
 */vendor
+.vendor-new/
 */.glide
 .terraform
 terraform.tfstate
 terraform.tfstate.backup
 terraform.tfstate.d
-
-.vscode
+profile\.out
+test/e2e/build
+test/e2e/networks/*/
+test/logs
+test/maverick/maverick
+test/p2p/data/
+vendor
+test/fuzz/**/corpus
+test/fuzz/**/crashers
+test/fuzz/**/suppressions
+test/fuzz/**/*.zip

.golangci.yml

@@ -0,0 +1,70 @@
+linters:
+  enable:
+    - asciicheck
+    - bodyclose
+    - deadcode
+    - depguard
+    - dogsled
+    - dupl
+    - errcheck
+    - exportloopref
+    # - funlen
+    # - gochecknoglobals
+    # - gochecknoinits
+    # - gocognit
+    - goconst
+    # - gocritic
+    # - gocyclo
+    # - godox
+    - gofmt
+    - goimports
+    - revive
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    # - interfacer
+    - lll
+    # - maligned
+    # - misspell
+    - nakedret
+    - nolintlint
+    - prealloc
+    - staticcheck
+    - structcheck
+    - stylecheck
+    # - typecheck
+    - unconvert
+    # - unparam
+    - unused
+    - varcheck
+    # - whitespace
+    # - wsl
+
+issues:
+  exclude-rules:
+    - path: _test\.go
+      linters:
+        - gosec
+    - linters:
+        - lll
+      source: "https://"
+  max-same-issues: 50
+
+linters-settings:
+  dogsled:
+    max-blank-identifiers: 3
+  maligned:
+    suggest-new: true
+  # govet:
+  #   check-shadowing: true
+  revive:
+    min-confidence: 0
+  maligned:
+    suggest-new: true
+  misspell:
+    locale: US
+    ignore-words:
+      - behaviour
+
+

.goreleaser.yml

@@ -0,0 +1,28 @@
+project_name: tendermint
+
+env:
+  # Require use of Go modules.
+  - GO111MODULE=on
+
+builds:
+  - id: "Tendermint"
+    main: ./cmd/tendermint/main.go
+    ldflags:
+      - -s -w -X github.com/tendermint/tendermint/version.TMCoreSemVer={{ .Version }}
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - darwin
+      - linux
+      - windows
+    goarch:
+      - amd64
+      - arm
+      - arm64
+
+checksum:
+  name_template: SHA256SUMS-{{.Version}}.txt
+  algorithm: sha256
+
+release:
+  name_template: "{{.Version}} (WARNING: BETA SOFTWARE)"

.markdownlint.yml

@@ -0,0 +1,8 @@
+default: true,
+MD007: { "indent": 4 }
+MD013: false
+MD024: { siblings_only: true }
+MD025: false
+MD033: { no-inline-html: false }
+no-hard-tabs: false
+whitespace: false

.markdownlintignore

@@ -0,0 +1,6 @@
+docs/node_modules
+CHANGELOG.md
+docs/architecture/*
+crypto/secp256k1/**
+scripts/*
+.github

.mergify.yml

@@ -0,0 +1,10 @@
+pull_request_rules:
+  - name: Automerge to master
+    conditions:
+      - base=master
+      - label=S:automerge
+    actions:
+      merge:
+        method: squash
+        strict: true
+        commit_message: title+body

.vscode/settings.json

@@ -0,0 +1,8 @@
+{
+  "protoc": {
+    "options": [
+      "--proto_path=${workspaceRoot}/proto",
+      "--proto_path=${workspaceRoot}/third_party/proto"
+    ]
+  }
+}

CHANGELOG_PENDING.md

@@ -1,36 +1,25 @@
-## v0.27.4
+# Unreleased Changes
 
-*TBD*
+## v0.34.18
 
 Special thanks to external contributors on this release:
 
-### BREAKING CHANGES:
+Friendly reminder, we have a [bug bounty program](https://hackerone.com/tendermint).
 
-* CLI/RPC/Config
-- [cli] Removed `node` `--proxy_app=dummy` option. Use `kvstore` (`persistent_kvstore`) instead.
-- [cli] Renamed `node` `--proxy_app=nilapp` to `--proxy_app=noop`.
-- [config] \#2992 `allow_duplicate_ip` is now set to false
+### BREAKING CHANGES
 
-- [privval] \#2926 split up `PubKeyMsg` into `PubKeyRequest` and `PubKeyResponse` to be consistent with other message types
+- CLI/RPC/Config
 
-* Apps
+- Apps
 
-* Go API  
-- [types] \#2926 memoize consensus public key on initialization of remote signer and return the memoized key on 
-`PrivValidator.GetPubKey()` instead of requesting it again 
-- [types] \#2981 Remove `PrivValidator.GetAddress()`
+- P2P Protocol
 
-* Blockchain Protocol
+- Go API
 
-* P2P Protocol
-- multiple connections from the same IP are now disabled by default (see `allow_duplicate_ip` config option)
+- Blockchain Protocol
 
-### FEATURES:
-- [privval] \#1181 Split immutable and mutable parts of priv_validator.json
+### FEATURES
 
-### IMPROVEMENTS:
+### IMPROVEMENTS
 
-### BUG FIXES:
-- [types] \#2926 do not panic if retrieving the private validator's public key fails
-- [crypto/multisig] \#3102 fix multisig keys address length
-- [crypto/encoding] \#3101 Fix `PubKeyMultisigThreshold` unmarshalling into `crypto.PubKey` interface
+### BUG FIXES

CODE_OF_CONDUCT.md

@@ -1,4 +1,5 @@
 # The Tendermint Code of Conduct
+
 This code of conduct applies to all projects run by the Tendermint/COSMOS team and hence to tendermint.
 
 
@@ -6,6 +7,7 @@ This code of conduct applies to all projects run by the Tendermint/COSMOS team a
 
 
 # Conduct
+
 ## Contact: conduct@tendermint.com
 
 * We are committed to providing a friendly, safe and welcoming environment for all, regardless of level of experience, gender, gender identity and expression, sexual orientation, disability, personal appearance, body size, race, ethnicity, age, religion, nationality, or other similar characteristic.
@@ -29,6 +31,7 @@ This code of conduct applies to all projects run by the Tendermint/COSMOS team a
 
 
 # Moderation
+
 These are the policies for upholding our community’s standards of conduct. If you feel that a thread needs moderation, please contact the above mentioned person.
 
 1. Remarks that violate the Tendermint/COSMOS standards of conduct, including hateful, hurtful, oppressive, or exclusionary remarks, are not allowed. (Cursing is allowed, but never targeting another user, and never in a hateful manner.)

CONTRIBUTING.md

@@ -1,40 +1,88 @@
 # Contributing
 
-Thank you for considering making contributions to Tendermint and related repositories! Start by taking a look at the [coding repo](https://github.com/tendermint/coding) for overall information on repository workflow and standards.
+Thank you for your interest in contributing to Tendermint! Before
+contributing, it may be helpful to understand the goal of the project. The goal
+of Tendermint is to develop a BFT consensus engine robust enough to
+support permissionless value-carrying networks. While all contributions are
+welcome, contributors should bear this goal in mind in deciding if they should
+target the main Tendermint project or a potential fork. When targeting the
+main Tendermint project, the following process leads to the best chance of
+landing changes in master.
 
-Please follow standard github best practices: fork the repo, branch from the tip of develop, make some commits, and submit a pull request to develop. See the [open issues](https://github.com/tendermint/tendermint/issues) for things we need help with!
+All work on the code base should be motivated by a [Github
+Issue](https://github.com/tendermint/tendermint/issues).
+[Search](https://github.com/tendermint/tendermint/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22)
+is a good place start when looking for places to contribute. If you
+would like to work on an issue which already exists, please indicate so
+by leaving a comment.
 
-Please make sure to use `gofmt` before every commit - the easiest way to do this is have your editor run it for you upon saving a file.
+All new contributions should start with a [Github
+Issue](https://github.com/tendermint/tendermint/issues/new/choose). The
+issue helps capture the problem you're trying to solve and allows for
+early feedback. Once the issue is created the process can proceed in different
+directions depending on how well defined the problem and potential
+solution are. If the change is simple and well understood, maintainers
+will indicate their support with a heartfelt emoji.
+
+If the issue would benefit from thorough discussion, maintainers may
+request that you create a [Request For
+Comment](https://github.com/tendermint/spec/tree/master/rfc). Discussion
+at the RFC stage will build collective understanding of the dimensions
+of the problems and help structure conversations around trade-offs.
+
+When the problem is well understood but the solution leads to large structural
+changes to the code base, these changes should be proposed in the form of an
+[Architectural Decision Record (ADR)](./docs/architecture/). The ADR will help
+build consensus on an overall strategy to ensure the code base maintains
+coherence in the larger context. If you are not comfortable with writing an
+ADR, you can open a less-formal issue and the maintainers will help you turn it
+into an ADR.
+
+> How to pick a number for the ADR?
+
+Find the largest existing ADR number and bump it by 1.
+
+When the problem as well as proposed solution are well understood,
+changes should start with a [draft
+pull request](https://github.blog/2019-02-14-introducing-draft-pull-requests/)
+against master. The draft signals that work is underway. When the work
+is ready for feedback, hitting "Ready for Review" will signal to the
+maintainers to take a look.
+
+![Contributing flow](./docs/imgs/contributing.png)
+
+Each stage of the process is aimed at creating feedback cycles which align contributors and maintainers to make sure:
+
+- Contributors don’t waste their time implementing/proposing features which won’t land in master.
+- Maintainers have the necessary context in order to support and review contributions.
 
 ## Forking
 
 Please note that Go requires code to live under absolute paths, which complicates forking.
 While my fork lives at `https://github.com/ebuchman/tendermint`,
-the code should never exist at  `$GOPATH/src/github.com/ebuchman/tendermint`.
+the code should never exist at `$GOPATH/src/github.com/ebuchman/tendermint`.
 Instead, we use `git remote` to add the fork as a new remote for the original repo,
-`$GOPATH/src/github.com/tendermint/tendermint `, and do all the work there.
+`$GOPATH/src/github.com/tendermint/tendermint`, and do all the work there.
 
 For instance, to create a fork and work on a branch of it, I would:
 
-  * Create the fork on github, using the fork button.
-  * Go to the original repo checked out locally (i.e. `$GOPATH/src/github.com/tendermint/tendermint`)
-  * `git remote rename origin upstream`
-  * `git remote add origin git@github.com:ebuchman/basecoin.git`
+- Create the fork on GitHub, using the fork button.
+- Go to the original repo checked out locally (i.e. `$GOPATH/src/github.com/tendermint/tendermint`)
+- `git remote rename origin upstream`
+- `git remote add origin git@github.com:ebuchman/basecoin.git`
 
-Now `origin` refers to my fork and `upstream` refers to the tendermint version.
+Now `origin` refers to my fork and `upstream` refers to the Tendermint version.
 So I can `git push -u origin master` to update my fork, and make pull requests to tendermint from there.
 Of course, replace `ebuchman` with your git handle.
 
 To pull in updates from the origin repo, run
 
-  * `git fetch upstream`
-  * `git rebase upstream/master` (or whatever branch you want)
-
-Please don't make Pull Requests to `master`.
+- `git fetch upstream`
+- `git rebase upstream/master` (or whatever branch you want)
 
 ## Dependencies
 
-We use [dep](https://github.com/golang/dep) to manage dependencies.
+We use [go modules](https://github.com/golang/go/wiki/Modules) to manage dependencies.
 
 That said, the master branch of every Tendermint repository should just build
 with `go get`, which means they should be kept up-to-date with their
@@ -42,18 +90,25 @@ dependencies so we can get away with telling people they can just `go get` our
 software.
 
 Since some dependencies are not under our control, a third party may break our
-build, in which case we can fall back on `dep ensure` (or `make
-get_vendor_deps`). Even for dependencies under our control, dep helps us to
+build, in which case we can fall back on `go mod tidy`. Even for dependencies under our control, go helps us to
 keep multiple repos in sync as they evolve. Anything with an executable, such
 as apps, tools, and the core, should use dep.
 
-Run `dep status` to get a list of vendor dependencies that may not be
+Run `go list -u -m all` to get a list of dependencies that may not be
 up-to-date.
 
 When updating dependencies, please only update the particular dependencies you
-need. Instead of running `dep ensure -update`, which will update anything,
+need. Instead of running `go get -u=patch`, which will update anything,
 specify exactly the dependency you want to update, eg.
-`dep ensure -update github.com/tendermint/go-amino`.
+`GO111MODULE=on go get -u github.com/tendermint/go-amino@master`.
+
+## Protobuf
+
+We use [Protocol Buffers](https://developers.google.com/protocol-buffers) along with [gogoproto](https://github.com/gogo/protobuf) to generate code for use across Tendermint Core.
+
+For linting and checking breaking changes, we use [buf](https://buf.build/). If you would like to run linting and check if the changes you have made are breaking then you will need to have docker running locally. Then the linting cmd will be `make proto-lint` and the breaking changes check will be `make proto-check-breaking`.
+
+We use [Docker](https://www.docker.com/) to generate the protobuf stubs. To generate the stubs yourself, make sure docker is running then run `make proto-gen`.
 
 ## Vagrant
 
@@ -63,7 +118,7 @@ hacking Tendermint with the commands below.
 NOTE: In case you installed Vagrant in 2017, you might need to run
 `vagrant box update` to upgrade to the latest `ubuntu/xenial64`.
 
-```
+```sh
 vagrant up
 vagrant ssh
 make test
@@ -76,7 +131,7 @@ pull-request that includes an update to the `CHANGELOG_PENDING.md` file.
 
 Changelog entries should be formatted as follows:
 
-```
+```md
 - [module] \#xxx Some description about the change (@contributor)
 ```
 
@@ -84,7 +139,7 @@ Here, `module` is the part of the code that changed (typically a
 top-level Go package), `xxx` is the pull-request number, and `contributor`
 is the author/s of the change.
 
-It's also acceptable for `xxx` to refer to the relevent issue number, but pull-request
+It's also acceptable for `xxx` to refer to the relevant issue number, but pull-request
 numbers are preferred.
 Note this means pull-requests should be opened first so the changelog can then
 be updated with the pull-request's number.
@@ -101,63 +156,254 @@ Breaking changes are further subdivided according to the APIs/users they impact.
 Any change that effects multiple APIs/users should be recorded multiply - for
 instance, a change to the `Blockchain Protocol` that removes a field from the
 header should also be recorded under `CLI/RPC/Config` since the field will be
-removed from the header in rpc responses as well.
+removed from the header in RPC responses as well.
 
 ## Branching Model and Release
 
-All repos should adhere to the branching model: http://nvie.com/posts/a-successful-git-branching-model/.
-This means that all pull-requests should be made against develop. Any merge to
-master constitutes a tagged release.
+The main development branch is master.
 
-### Development Procedure:
-- the latest state of development is on `develop`
-- `develop` must never fail `make test`
-- never --force onto `develop` (except when reverting a broken commit, which should seldom happen)
-- create a development branch either on github.com/tendermint/tendermint, or your fork (using `git remote add origin`)
-- make changes and update the `CHANGELOG_PENDING.md` to record your change
-- before submitting a pull request, run `git rebase` on top of the latest `develop`
+Every release is maintained in a release branch named `vX.Y.Z`.
 
-### Pull Merge Procedure:
-- ensure pull branch is based on a recent develop
-- run `make test` to ensure that all tests pass
-- merge pull request
-- the `unstable` branch may be used to aggregate pull merges before fixing tests
+Pending minor releases have long-lived release candidate ("RC") branches. Minor release changes should be merged to these long-lived RC branches at the same time that the changes are merged to master.
 
-### Release Procedure:
-- start on `develop`
-- run integration tests (see `test_integrations` in Makefile)
-- prepare changelog:
-    - copy `CHANGELOG_PENDING.md` to top of `CHANGELOG.md`
-    - run `python ./scripts/linkify_changelog.py CHANGELOG.md` to add links for
-      all issues
-    - run `bash ./scripts/authors.sh` to get a list of authors since the latest
-      release, and add the github aliases of external contributors to the top of
-      the changelog. To lookup an alias from an email, try `bash
-      ./scripts/authors.sh <email>`
-    - reset the `CHANGELOG_PENDING.md`
-- bump versions
-- push to release/vX.X.X to run the extended integration tests on the CI
-- merge to master
-- merge master back to develop
+Note all pull requests should be squash merged except for merging to a release branch (named `vX.Y`). This keeps the commit history clean and makes it
+easy to reference the pull request where a change was introduced.
 
-### Hotfix Procedure:
-- start on `master`
-- checkout a new branch named hotfix-vX.X.X
-- make the required changes
-  - these changes should be small and an absolute necessity
-  - add a note to CHANGELOG.md
-- bump versions
-- push to hotfix-vX.X.X to run the extended integration tests on the CI
-- merge hotfix-vX.X.X to master
-- merge hotfix-vX.X.X to develop
-- delete the hotfix-vX.X.X branch
+### Development Procedure
 
+The latest state of development is on `master`, which must never fail `make test`. _Never_ force push `master`, unless fixing broken git history (which we rarely do anyways).
+
+To begin contributing, create a development branch either on `github.com/tendermint/tendermint`, or your fork (using `git remote add origin`).
+
+Make changes, and before submitting a pull request, update the `CHANGELOG_PENDING.md` to record your change. Also, run either `git rebase` or `git merge` on top of the latest `master`. (Since pull requests are squash-merged, either is fine!)
+
+Update the `UPGRADING.md` if the change you've made is breaking and the
+instructions should be in place for a user on how he/she can upgrade it's
+software (ABCI application, Tendermint-based blockchain, light client, wallet).
+
+Once you have submitted a pull request label the pull request with either `R:minor`, if the change should be included in the next minor release, or `R:major`, if the change is meant for a major release.
+
+Sometimes (often!) pull requests get out-of-date with master, as other people merge different pull requests to master. It is our convention that pull request authors are responsible for updating their branches with master. (This also means that you shouldn't update someone else's branch for them; even if it seems like you're doing them a favor, you may be interfering with their git flow in some way!)
+
+#### Merging Pull Requests
+
+It is also our convention that authors merge their own pull requests, when possible. External contributors may not have the necessary permissions to do this, in which case, a member of the core team will merge the pull request once it's been approved.
+
+Before merging a pull request:
+
+- Ensure pull branch is up-to-date with a recent `master` (GitHub won't let you merge without this!)
+- Run `make test` to ensure that all tests pass
+- [Squash](https://stackoverflow.com/questions/5189560/squash-my-last-x-commits-together-using-git) merge pull request
+
+#### Pull Requests for Minor Releases
+
+If your change should be included in a minor release, please also open a PR against the long-lived minor release candidate branch (e.g., `rc1/v0.33.5`) _immediately after your change has been merged to master_.
+
+You can do this by cherry-picking your commit off master:
+
+```sh
+$ git checkout rc1/v0.33.5
+$ git checkout -b {new branch name}
+$ git cherry-pick {commit SHA from master}
+# may need to fix conflicts, and then use git add and git cherry-pick --continue
+$ git push origin {new branch name}
+```
+
+After this, you can open a PR. Please note in the PR body if there were merge conflicts so that reviewers can be sure to take a thorough look.
+
+### Git Commit Style
+
+We follow the [Go style guide on commit messages](https://tip.golang.org/doc/contribute.html#commit_messages). Write concise commits that start with the package name and have a description that finishes the sentence "This change modifies Tendermint to...". For example,
+
+```sh
+cmd/debug: execute p.Signal only when p is not nil
+
+[potentially longer description in the body]
+
+Fixes #nnnn
+```
+
+Each PR should have one commit once it lands on `master`; this can be accomplished by using the "squash and merge" button on Github. Be sure to edit your commit message, though!
+
+### Release Procedure
+
+#### Major Release
+
+1. Start on `master`
+2. Run integration tests (see `test_integrations` in Makefile)
+3. Prepare release in a pull request against `master` (to be squash merged):
+   - Copy `CHANGELOG_PENDING.md` to top of `CHANGELOG.md`; if this release
+      had release candidates, squash all the RC updates into one
+   - Run `python ./scripts/linkify_changelog.py CHANGELOG.md` to add links for
+     all issues
+   - run `bash ./scripts/authors.sh` to get a list of authors since the latest
+     release, and add the github aliases of external contributors to the top of
+     the changelog. To lookup an alias from an email, try `bash ./scripts/authors.sh <email>`
+   - Reset the `CHANGELOG_PENDING.md`
+   - Bump TMVersionDefault version in  `version.go`
+   - Bump P2P and block protocol versions in  `version.go`, if necessary
+   - Bump ABCI protocol version in `version.go`, if necessary
+   - Make sure all significant breaking changes are covered in `UPGRADING.md`
+   - Add any release notes you would like to be added to the body of the release to `release_notes.md`.
+4. Push a tag with prepared release details (this will trigger the release `vX.X.0`)
+   - `git tag -a vX.X.x -m 'Release vX.X.x'`
+   - `git push origin vX.X.x`
+5. Update the changelog.md file on master with the releases changelog.
+6. Delete any RC branches and tags for this release (if applicable)
+
+#### Minor Release
+
+Minor releases are done differently from major releases: They are built off of long-lived release candidate branches, rather than from master.
+
+1. Checkout the long-lived release candidate branch: `git checkout rcX/vX.X.X`
+2. Run integration tests: `make test_integrations`
+3. Prepare the release:
+   - copy `CHANGELOG_PENDING.md` to top of `CHANGELOG.md`
+   - run `python ./scripts/linkify_changelog.py CHANGELOG.md` to add links for all issues
+   - run `bash ./scripts/authors.sh` to get a list of authors since the latest release, and add the GitHub aliases of external contributors to the top of the CHANGELOG. To lookup an alias from an email, try `bash ./scripts/authors.sh <email>`
+   - reset the `CHANGELOG_PENDING.md`
+   - bump P2P and block protocol versions in  `version.go`, if necessary
+   - bump ABCI protocol version in `version.go`, if necessary
+   - make sure all significant breaking changes are covered in `UPGRADING.md`
+   - Add any release notes you would like to be added to the body of the release to `release_notes.md`.
+4. Create a release branch `release/vX.X.x` off the release candidate branch:
+   - `git checkout -b release/vX.X.x`
+   - `git push -u origin release/vX.X.x`
+   - Note that all branches prefixed with `release` are protected once pushed. You will need admin help to make any changes to the branch.
+5. Once the release branch has been approved, make sure to pull it locally, then push a tag.
+   - `git tag -a vX.X.x -m 'Release vX.X.x'`
+   - `git push origin vX.X.x`
+6. Create a pull request back to master with the CHANGELOG & version changes from the latest release.
+   - Remove all `R:minor` labels from the pull requests that were included in the release.
+   - Do not merge the release branch into master.
+7. Delete the former long lived release candidate branch once the release has been made.
+8. Create a new release candidate branch to be used for the next release.
+
+#### Backport Release
+
+1. start from the existing release branch you want to backport changes to (e.g. v0.30)
+   Branch to a release/vX.X.X branch locally (e.g. release/v0.30.7)
+2. Cherry pick the commit(s) that contain the changes you want to backport (usually these commits are from squash-merged PRs which were already reviewed)
+3. Follow steps 2 and 3 from [Major Release](#major-release)
+4. Push changes to release/vX.X.X branch
+5. Open a PR against the existing vX.X branch
+
+#### Release Candidates
+
+Before creating an official release, especially a major release, we may want to create a
+release candidate (RC) for our friends and partners to test out. We use git tags to
+create RCs, and we build them off of RC branches. RC branches typically have names formatted
+like `RCX/vX.X.X` (or, concretely, `RC0/v0.34.0`), while the tags themselves follow
+the "standard" release naming conventions, with `-rcX` at the end (`vX.X.X-rcX`).
+
+(Note that branches and tags _cannot_ have the same names, so it's important that these branches
+have distinct names from the tags/release names.)
+
+1. Start from the RC branch (e.g. `RC0/v0.34.0`).
+2. Create the new tag, specifying a name and a tag "message":  
+   `git tag -a v0.34.0-rc0 -m "Release Candidate v0.34.0-rc0` 
+3. Push the tag back up to origin:  
+   `git push origin v0.34.0-rc4`  
+   Now the tag should be available on the repo's releases page. 
+4. Create a new release candidate branch for any possible updates to the RC:  
+   `git checkout -b RC1/v0.34.0; git push origin RC1/v0.34.0`
 
 ## Testing
 
-All repos should be hooked up to [CircleCI](https://circleci.com/).
+### Unit tests
 
-If they have `.go` files in the root directory, they will be automatically
-tested by circle using `go test -v -race ./...`. If not, they will need a
-`circle.yml`. Ideally, every repo has a `Makefile` that defines `make test` and
-includes its continuous integration status using a badge in the `README.md`.
+Unit tests are located in `_test.go` files as directed by [the Go testing
+package](https://golang.org/pkg/testing/). If you're adding or removing a
+function, please check there's a `TestType_Method` test for it.
+
+Run: `make test`
+
+### Integration tests
+
+Integration tests are also located in `_test.go` files. What differentiates
+them is a more complicated setup, which usually involves setting up two or more
+components.
+
+Run: `make test_integrations`
+
+### End-to-end tests
+
+End-to-end tests are used to verify a fully integrated Tendermint network.
+
+See [README](./test/e2e/README.md) for details.
+
+Run:
+
+```sh
+cd test/e2e && \
+  make && \
+  ./build/runner -f networks/ci.toml
+```
+
+### Maverick
+
+**If you're changing the code in `consensus` package, please make sure to
+replicate all the changes in `./test/maverick/consensus`**. Maverick is a
+byzantine node used to assert that the validator gets punished for malicious
+behavior.
+
+See [README](./test/maverick/README.md) for details.
+
+### Model-based tests (ADVANCED)
+
+*NOTE: if you're just submitting your first PR, you won't need to touch these
+most probably (99.9%)*.
+
+For components, that have been [formally
+verified](https://en.wikipedia.org/wiki/Formal_verification) using
+[TLA+](https://en.wikipedia.org/wiki/TLA%2B), it may be possible to generate
+tests using a combination of the [Apalache Model
+Checker](https://apalache.informal.systems/) and [tendermint-rs testgen
+util](https://github.com/informalsystems/tendermint-rs/tree/master/testgen).
+
+Now, I know there's a lot to take in. If you want to learn more, check out [
+this video](https://www.youtube.com/watch?v=aveoIMphzW8) by Andrey Kupriyanov
+& Igor Konnov.
+
+At the moment, we have model-based tests for the light client, located in the
+`./light/mbt` directory.
+
+Run: `cd light/mbt && go test`
+
+### Fuzz tests (ADVANCED)
+
+*NOTE: if you're just submitting your first PR, you won't need to touch these
+most probably (99.9%)*.
+
+[Fuzz tests](https://en.wikipedia.org/wiki/Fuzzing) can be found inside the
+`./test/fuzz` directory. See [README.md](./test/fuzz/README.md) for details.
+
+Run: `cd test/fuzz && make fuzz-{PACKAGE-COMPONENT}`
+
+### Jepsen tests (ADVANCED)
+
+*NOTE: if you're just submitting your first PR, you won't need to touch these
+most probably (99.9%)*.
+
+[Jepsen](http://jepsen.io/) tests are used to verify the
+[linearizability](https://jepsen.io/consistency/models/linearizable) property
+of the Tendermint consensus. They are located in a separate repository
+-> <https://github.com/tendermint/jepsen>. Please refer to its README for more
+information.
+
+### RPC Testing
+
+If you contribute to the RPC endpoints it's important to document your changes in the [Openapi file](./rpc/openapi/openapi.yaml)
+To test your changes you should install `nodejs` and run:
+
+```bash
+npm i -g dredd
+make build-linux build-contract-tests-hooks
+make contract-tests
+```
+
+**WARNING: these are currently broken due to <https://github.com/apiaryio/dredd>
+not supporting complete OpenAPI 3**.
+
+This command will popup a network and check every endpoint against what has
+been documented.

DOCKER/Dockerfile

@@ -1,5 +1,15 @@
-FROM alpine:3.7
-MAINTAINER Greg Szabo <greg@tendermint.com>
+# stage 1 Generate Tendermint Binary
+FROM golang:1.15-alpine as builder
+RUN apk update && \
+    apk upgrade && \
+    apk --no-cache add make
+COPY / /tendermint
+WORKDIR /tendermint
+RUN make build-linux
+
+# stage 2
+FROM golang:1.15-alpine
+LABEL maintainer="hello@tendermint.com"
 
 # Tendermint will be looking for the genesis file in /tendermint/config/genesis.json
 # (unless you change `genesis_file` in config.toml). You can put your config.toml and
@@ -22,18 +32,25 @@ RUN apk update && \
 # Run the container with tmuser by default. (UID=100, GID=1000)
 USER tmuser
 
-# Expose the data directory as a volume since there's mutable state in there
-VOLUME [ $TMHOME ]
-
 WORKDIR $TMHOME
 
-# p2p and rpc port
-EXPOSE 26656 26657
+# p2p, rpc and prometheus port
+EXPOSE 26656 26657 26660
 
-ENTRYPOINT ["/usr/bin/tendermint"]
-CMD ["node", "--moniker=`hostname`"]
 STOPSIGNAL SIGTERM
 
-ARG BINARY=tendermint
-COPY $BINARY /usr/bin/tendermint
+COPY --from=builder /tendermint/build/tendermint /usr/bin/tendermint
+
+# You can overwrite these before the first run to influence
+# config.json and genesis.json. Additionally, you can override
+# CMD to add parameters to `tendermint node`.
+ENV PROXY_APP=kvstore MONIKER=dockernode CHAIN_ID=dockerchain
+
+COPY ./DOCKER/docker-entrypoint.sh /usr/local/bin/
+
+ENTRYPOINT ["docker-entrypoint.sh"]
+CMD ["node"]
+
+# Expose the data directory as a volume since there's mutable state in there
+VOLUME [ "$TMHOME" ]
 

DOCKER/Dockerfile.abci

@@ -1,23 +0,0 @@
-FROM golang:latest
-
-RUN mkdir -p /go/src/github.com/tendermint/abci
-WORKDIR /go/src/github.com/tendermint/abci
-
-COPY Makefile /go/src/github.com/tendermint/abci/
-
-# see make protoc for details on ldconfig
-RUN make get_protoc && ldconfig
-
-# killall is used in tests
-RUN apt-get update && apt-get install -y \
-    psmisc \
- && rm -rf /var/lib/apt/lists/*
-
-COPY Gopkg.toml /go/src/github.com/tendermint/abci/
-COPY Gopkg.lock /go/src/github.com/tendermint/abci/
-RUN make get_tools
-
-# see https://github.com/golang/dep/issues/1312
-RUN dep ensure -vendor-only
-
-COPY . /go/src/github.com/tendermint/abci

DOCKER/Dockerfile.build_c-amazonlinux

@@ -0,0 +1,28 @@
+FROM amazonlinux:2
+
+RUN yum -y update && \
+    yum -y install wget
+
+RUN wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm && \
+    rpm -ivh epel-release-latest-7.noarch.rpm
+
+RUN yum -y groupinstall "Development Tools"
+RUN yum -y install leveldb-devel which
+
+ENV GOVERSION=1.12.9
+
+RUN cd /tmp && \
+    wget https://dl.google.com/go/go${GOVERSION}.linux-amd64.tar.gz && \
+    tar -C /usr/local -xf go${GOVERSION}.linux-amd64.tar.gz && \
+    mkdir -p /go/src && \
+    mkdir -p /go/bin
+
+ENV PATH=$PATH:/usr/local/go/bin:/go/bin
+ENV GOBIN=/go/bin
+ENV GOPATH=/go/src
+
+RUN mkdir -p /tendermint
+WORKDIR /tendermint
+
+CMD ["/usr/bin/make", "build", "TENDERMINT_BUILD_OPTIONS=cleveldb"]
+

DOCKER/Dockerfile.develop

@@ -1,35 +0,0 @@
-FROM alpine:3.7
-
-ENV DATA_ROOT /tendermint
-ENV TMHOME $DATA_ROOT
-
-RUN addgroup tmuser && \
-    adduser -S -G tmuser tmuser
-
-RUN mkdir -p $DATA_ROOT && \
-    chown -R tmuser:tmuser $DATA_ROOT
-
-RUN apk add --no-cache bash curl jq
-
-ENV GOPATH /go
-ENV PATH "$PATH:/go/bin"
-RUN mkdir -p /go/src/github.com/tendermint/tendermint && \
-    apk add --no-cache go build-base git && \
-    cd /go/src/github.com/tendermint/tendermint && \
-    git clone https://github.com/tendermint/tendermint . && \
-    git checkout develop && \
-    make get_tools && \
-    make get_vendor_deps && \
-    make install && \
-    cd - && \
-    rm -rf /go/src/github.com/tendermint/tendermint && \
-    apk del go build-base git
-
-VOLUME $DATA_ROOT
-
-EXPOSE 26656
-EXPOSE 26657
-
-ENTRYPOINT ["tendermint"]
-
-CMD ["node", "--moniker=`hostname`", "--proxy_app=kvstore"]

DOCKER/Dockerfile.testing

@@ -1,5 +1,4 @@
-FROM golang:1.10.1
-
+FROM golang:latest
 
 # Grab deps (jq, hexdump, xxd, killall)
 RUN apt-get update && \
@@ -15,4 +14,3 @@ VOLUME /go
 
 EXPOSE 26656
 EXPOSE 26657
-

DOCKER/Makefile

@@ -4,13 +4,10 @@ build:
 push:
 	@sh -c "'$(CURDIR)/push.sh'"
 
-build_develop:
-	docker build -t "tendermint/tendermint:develop" -f Dockerfile.develop .
-
 build_testing:
 	docker build --tag tendermint/testing -f ./Dockerfile.testing .
 
-push_develop:
-	docker push "tendermint/tendermint:develop"
+build_amazonlinux_buildimage:
+	docker build -t "tendermint/tendermint:build_c-amazonlinux" -f Dockerfile.build_c-amazonlinux .
 
-.PHONY: build build_develop push push_develop
+.PHONY: build push build_testing build_amazonlinux_buildimage

DOCKER/README.md

@@ -2,38 +2,27 @@
 
 ## Supported tags and respective `Dockerfile` links
 
-- `0.17.1`, `latest` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/208ac32fa266657bd6c304e84ec828aa252bb0b8/DOCKER/Dockerfile)
-- `0.15.0` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/170777300ea92dc21a8aec1abc16cb51812513a4/DOCKER/Dockerfile)
-- `0.13.0` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/a28b3fff49dce2fb31f90abb2fc693834e0029c2/DOCKER/Dockerfile)
-- `0.12.1` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/457c688346b565e90735431619ca3ca597ef9007/DOCKER/Dockerfile)
-- `0.12.0` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/70d8afa6e952e24c573ece345560a5971bf2cc0e/DOCKER/Dockerfile)
-- `0.11.0` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/9177cc1f64ca88a4a0243c5d1773d10fba67e201/DOCKER/Dockerfile)
-- `0.10.0` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/e5342f4054ab784b2cd6150e14f01053d7c8deb2/DOCKER/Dockerfile)
-- `0.9.1`, `0.9`, [(Dockerfile)](https://github.com/tendermint/tendermint/blob/809e0e8c5933604ba8b2d096803ada7c5ec4dfd3/DOCKER/Dockerfile)
-- `0.9.0` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/d474baeeea6c22b289e7402449572f7c89ee21da/DOCKER/Dockerfile)
-- `0.8.0`, `0.8` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/bf64dd21fdb193e54d8addaaaa2ecf7ac371de8c/DOCKER/Dockerfile)
-- `develop` [(Dockerfile)](https://github.com/tendermint/tendermint/blob/master/DOCKER/Dockerfile.develop)
+DockerHub tags for official releases are [here](https://hub.docker.com/r/tendermint/tendermint/tags/). The "latest" tag will always point to the highest version number.
 
-`develop` tag points to the [develop](https://github.com/tendermint/tendermint/tree/develop) branch.
+Official releases can be found [here](https://github.com/tendermint/tendermint/releases).
+
+The Dockerfile for tendermint is not expected to change in the near future. The master file used for all builds can be found [here](https://raw.githubusercontent.com/tendermint/tendermint/master/DOCKER/Dockerfile).
+
+Respective versioned files can be found <https://raw.githubusercontent.com/tendermint/tendermint/vX.XX.XX/DOCKER/Dockerfile> (replace the Xs with the version number).
 
 ## Quick reference
 
-* **Where to get help:**
-  https://cosmos.network/community
-
-* **Where to file issues:**
-  https://github.com/tendermint/tendermint/issues
-
-* **Supported Docker versions:**
-  [the latest release](https://github.com/moby/moby/releases) (down to 1.6 on a best-effort basis)
+- **Where to get help:** <https://tendermint.com/>
+- **Where to file issues:** <https://github.com/tendermint/tendermint/issues>
+- **Supported Docker versions:** [the latest release](https://github.com/moby/moby/releases) (down to 1.6 on a best-effort basis)
 
 ## Tendermint
 
 Tendermint Core is Byzantine Fault Tolerant (BFT) middleware that takes a state transition machine, written in any programming language, and securely replicates it on many machines.
 
-For more background, see the [introduction](https://tendermint.readthedocs.io/en/master/introduction.html).
+For more background, see the [the docs](https://docs.tendermint.com/master/introduction/#quick-start).
 
-To get started developing applications, see the [application developers guide](https://tendermint.readthedocs.io/en/master/getting-started.html).
+To get started developing applications, see the [application developers guide](https://docs.tendermint.com/master/introduction/quick-start.html).
 
 ## How to use this image
 
@@ -41,16 +30,16 @@ To get started developing applications, see the [application developers guide](h
 
 A quick example of a built-in app and Tendermint core in one container.
 
-```
+```sh
 docker run -it --rm -v "/tmp:/tendermint" tendermint/tendermint init
 docker run -it --rm -v "/tmp:/tendermint" tendermint/tendermint node --proxy_app=kvstore
 ```
 
 ## Local cluster
 
-To run a 4-node network, see the `Makefile` in the root of [the repo](https://github.com/tendermint/tendermint/master/Makefile) and run:
+To run a 4-node network, see the `Makefile` in the root of [the repo](https://github.com/tendermint/tendermint/blob/master/Makefile) and run:
 
-```
+```sh
 make build-linux
 make build-docker-localnode
 make localnet-start
@@ -60,7 +49,7 @@ Note that this will build and use a different image than the ones provided here.
 
 ## License
 
-- Tendermint's license is [Apache 2.0](https://github.com/tendermint/tendermint/master/LICENSE).
+- Tendermint's license is [Apache 2.0](https://github.com/tendermint/tendermint/blob/master/LICENSE).
 
 ## Contributing
 

DOCKER/docker-entrypoint.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+
+if [ ! -d "$TMHOME/config" ]; then
+	echo "Running tendermint init to create (default) configuration for docker run."
+	tendermint init
+
+	sed -i \
+		-e "s/^proxy_app\s*=.*/proxy_app = \"$PROXY_APP\"/" \
+		-e "s/^moniker\s*=.*/moniker = \"$MONIKER\"/" \
+		-e 's/^addr_book_strict\s*=.*/addr_book_strict = false/' \
+		-e 's/^timeout_commit\s*=.*/timeout_commit = "500ms"/' \
+		-e 's/^index_all_tags\s*=.*/index_all_tags = true/' \
+		-e 's,^laddr = "tcp://127.0.0.1:26657",laddr = "tcp://0.0.0.0:26657",' \
+		-e 's/^prometheus\s*=.*/prometheus = true/' \
+		"$TMHOME/config/config.toml"
+
+	jq ".chain_id = \"$CHAIN_ID\" | .consensus_params.block.time_iota_ms = \"500\"" \
+		"$TMHOME/config/genesis.json" > "$TMHOME/config/genesis.json.new"
+	mv "$TMHOME/config/genesis.json.new" "$TMHOME/config/genesis.json"
+fi
+
+exec tendermint "$@"

Gopkg.lock

@@ -1,554 +0,0 @@
-# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
-
-
-[[projects]]
-  branch = "master"
-  digest = "1:d6afaeed1502aa28e80a4ed0981d570ad91b2579193404256ce672ed0a609e0d"
-  name = "github.com/beorn7/perks"
-  packages = ["quantile"]
-  pruneopts = "UT"
-  revision = "3a771d992973f24aa725d07868b467d1ddfceafb"
-
-[[projects]]
-  branch = "master"
-  digest = "1:c0decf632843204d2b8781de7b26e7038584e2dcccc7e2f401e88ae85b1df2b7"
-  name = "github.com/btcsuite/btcd"
-  packages = ["btcec"]
-  pruneopts = "UT"
-  revision = "67e573d211ace594f1366b4ce9d39726c4b19bd0"
-
-[[projects]]
-  digest = "1:1d8e1cb71c33a9470bbbae09bfec09db43c6bf358dfcae13cd8807c4e2a9a2bf"
-  name = "github.com/btcsuite/btcutil"
-  packages = [
-    "base58",
-    "bech32",
-  ]
-  pruneopts = "UT"
-  revision = "d4cc87b860166d00d6b5b9e0d3b3d71d6088d4d4"
-
-[[projects]]
-  digest = "1:ffe9824d294da03b391f44e1ae8281281b4afc1bdaa9588c9097785e3af10cec"
-  name = "github.com/davecgh/go-spew"
-  packages = ["spew"]
-  pruneopts = "UT"
-  revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73"
-  version = "v1.1.1"
-
-[[projects]]
-  digest = "1:544229a3ca0fb2dd5ebc2896d3d2ff7ce096d9751635301e44e37e761349ee70"
-  name = "github.com/fortytw2/leaktest"
-  packages = ["."]
-  pruneopts = "UT"
-  revision = "a5ef70473c97b71626b9abeda80ee92ba2a7de9e"
-  version = "v1.2.0"
-
-[[projects]]
-  digest = "1:abeb38ade3f32a92943e5be54f55ed6d6e3b6602761d74b4aab4c9dd45c18abd"
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Gopkg.toml

@@ -1,109 +0,0 @@
-# Gopkg.toml example
-#
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-#
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-# [prune]
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-###########################################################
-
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-# Allow only minor releases for other libraries
-[[constraint]]
-  name = "github.com/go-kit/kit"
-  version = "^0.6.0"
-
-[[constraint]]
-  name = "github.com/gorilla/websocket"
-  version = "^1.2.0"
-
-[[constraint]]
-  name = "github.com/rs/cors"
-  version = "^1.6.0"
-
-[[constraint]]
-  name = "github.com/pkg/errors"
-  version = "^0.8.0"
-
-[[constraint]]
-  name = "github.com/spf13/cobra"
-  version = "^0.0.1"
-
-[[constraint]]
-  name = "github.com/spf13/viper"
-  version = "^1.0.0"
-
-[[constraint]]
-  name = "github.com/stretchr/testify"
-  version = "^1.2.1"
-
-[[constraint]]
-  name = "google.golang.org/grpc"
-  version = "^1.13.0"
-
-[[constraint]]
-  name = "github.com/fortytw2/leaktest"
-  version = "^1.2.0"
-
-[[constraint]]
-  name = "github.com/prometheus/client_golang"
-  version = "^0.9.1"
-
-###################################
-## Some repos dont have releases.
-## Pin to revision
-
-[[constraint]]
-  name = "golang.org/x/crypto"
-  revision = "505ab145d0a99da450461ae2c1a9f6cd10d1f447"
-
-[[override]]
-  name = "github.com/jmhodges/levigo"
-  revision = "c42d9e0ca023e2198120196f842701bb4c55d7b9"
-
-# last revision used by go-crypto
-[[constraint]]
-  name = "github.com/btcsuite/btcutil"
-  revision = "d4cc87b860166d00d6b5b9e0d3b3d71d6088d4d4"
-
-[[constraint]]
-  name = "github.com/tendermint/btcd"
-  revision = "e5840949ff4fff0c56f9b6a541e22b63581ea9df"
-
-[[constraint]]
-  name = "github.com/rcrowley/go-metrics"
-  revision = "e2704e165165ec55d062f5919b4b29494e9fa790"
-
-[[constraint]]
-  name = "golang.org/x/net"
-  revision = "292b43bbf7cb8d35ddf40f8d5100ef3837cced3f"
-
-[prune]
-  go-tests = true
-  unused-packages = true

Makefile

@@ -1,335 +1,264 @@
-GOTOOLS = \
-	github.com/mitchellh/gox \
-	github.com/golang/dep/cmd/dep \
-	github.com/alecthomas/gometalinter \
-	github.com/gogo/protobuf/protoc-gen-gogo \
-	github.com/square/certstrap
-GOBIN?=${GOPATH}/bin
 PACKAGES=$(shell go list ./...)
+OUTPUT?=build/tendermint
 
-INCLUDE = -I=. -I=${GOPATH}/src -I=${GOPATH}/src/github.com/gogo/protobuf/protobuf
-BUILD_TAGS?='tendermint'
-BUILD_FLAGS = -ldflags "-X github.com/tendermint/tendermint/version.GitCommit=`git rev-parse --short=8 HEAD`"
+BUILD_TAGS?=tendermint
 
-LINT_FLAGS = --exclude '.*\.pb\.go' --exclude 'vendor/*' --vendor --deadline=600s
+# If building a release, please checkout the version tag to get the correct version setting
+ifneq ($(shell git symbolic-ref -q --short HEAD),)
+VERSION := unreleased-$(shell git symbolic-ref -q --short HEAD)-$(shell git rev-parse HEAD)
+else
+VERSION := $(shell git describe)
+endif
+
+LD_FLAGS = -X github.com/tendermint/tendermint/version.TMCoreSemVer=$(VERSION)
+BUILD_FLAGS = -mod=readonly -ldflags "$(LD_FLAGS)"
+HTTPS_GIT := https://github.com/tendermint/tendermint.git
+DOCKER_BUF := docker run -v $(shell pwd):/workspace --workdir /workspace bufbuild/buf
+CGO_ENABLED ?= 0
+
+# handle nostrip
+ifeq (,$(findstring nostrip,$(TENDERMINT_BUILD_OPTIONS)))
+  BUILD_FLAGS += -trimpath
+  LD_FLAGS += -s -w
+endif
+
+# handle race
+ifeq (race,$(findstring race,$(TENDERMINT_BUILD_OPTIONS)))
+  CGO_ENABLED=1
+  BUILD_FLAGS += -race
+endif
+
+# handle cleveldb
+ifeq (cleveldb,$(findstring cleveldb,$(TENDERMINT_BUILD_OPTIONS)))
+  CGO_ENABLED=1
+  BUILD_TAGS += cleveldb
+endif
+
+# handle badgerdb
+ifeq (badgerdb,$(findstring badgerdb,$(TENDERMINT_BUILD_OPTIONS)))
+  BUILD_TAGS += badgerdb
+endif
+
+# handle rocksdb
+ifeq (rocksdb,$(findstring rocksdb,$(TENDERMINT_BUILD_OPTIONS)))
+  CGO_ENABLED=1
+  BUILD_TAGS += rocksdb
+endif
+
+# handle boltdb
+ifeq (boltdb,$(findstring boltdb,$(TENDERMINT_BUILD_OPTIONS)))
+  BUILD_TAGS += boltdb
+endif
+
+# allow users to pass additional flags via the conventional LDFLAGS variable
+LD_FLAGS += $(LDFLAGS)
 
 all: check build test install
+.PHONY: all
 
-check: check_tools get_vendor_deps
+include tests.mk
 
-########################################
-### Build Tendermint
+###############################################################################
+###                                Build Tendermint                        ###
+###############################################################################
 
 build:
-	CGO_ENABLED=0 go build $(BUILD_FLAGS) -tags $(BUILD_TAGS) -o build/tendermint ./cmd/tendermint/
-
-build_c:
-	CGO_ENABLED=1 go build $(BUILD_FLAGS) -tags "$(BUILD_TAGS) gcc" -o build/tendermint ./cmd/tendermint/
-
-build_race:
-	CGO_ENABLED=0 go build -race $(BUILD_FLAGS) -tags $(BUILD_TAGS) -o build/tendermint ./cmd/tendermint
+	CGO_ENABLED=$(CGO_ENABLED) go build $(BUILD_FLAGS) -tags '$(BUILD_TAGS)' -o $(OUTPUT) ./cmd/tendermint/
+.PHONY: build
 
 install:
-	CGO_ENABLED=0 go install  $(BUILD_FLAGS) -tags $(BUILD_TAGS) ./cmd/tendermint
+	CGO_ENABLED=$(CGO_ENABLED) go install $(BUILD_FLAGS) -tags $(BUILD_TAGS) ./cmd/tendermint
+.PHONY: install
 
-install_c:
-	CGO_ENABLED=1 go install  $(BUILD_FLAGS) -tags "$(BUILD_TAGS) gcc" ./cmd/tendermint
+###############################################################################
+###                                Protobuf                                 ###
+###############################################################################
 
-########################################
-### Protobuf
+proto-all: proto-gen proto-lint proto-check-breaking
+.PHONY: proto-all
 
-protoc_all: protoc_libs protoc_merkle protoc_abci protoc_grpc protoc_proto3types
+proto-gen:
+	@docker pull -q tendermintdev/docker-build-proto
+	@echo "Generating Protobuf files"
+	@docker run -v $(shell pwd):/workspace --workdir /workspace tendermintdev/docker-build-proto sh ./scripts/protocgen.sh
+.PHONY: proto-gen
 
-%.pb.go: %.proto
-	## If you get the following error,
-	## "error while loading shared libraries: libprotobuf.so.14: cannot open shared object file: No such file or directory"
-	## See https://stackoverflow.com/a/25518702
-	## Note the $< here is substituted for the %.proto
-	## Note the $@ here is substituted for the %.pb.go
-	protoc $(INCLUDE) $< --gogo_out=Mgoogle/protobuf/timestamp.proto=github.com/golang/protobuf/ptypes/timestamp,plugins=grpc:.
+proto-lint:
+	@$(DOCKER_BUF) check lint --error-format=json
+.PHONY: proto-lint
 
-########################################
-### Build ABCI
+proto-format:
+	@echo "Formatting Protobuf files"
+	docker run -v $(shell pwd):/workspace --workdir /workspace tendermintdev/docker-build-proto find ./ -not -path "./third_party/*" -name *.proto -exec clang-format -i {} \;
+.PHONY: proto-format
 
-# see protobuf section above
-protoc_abci: abci/types/types.pb.go
+proto-check-breaking:
+	@$(DOCKER_BUF) check breaking --against-input .git#branch=master
+.PHONY: proto-check-breaking
 
-protoc_proto3types: types/proto3/block.pb.go
+proto-check-breaking-ci:
+	@$(DOCKER_BUF) check breaking --against-input $(HTTPS_GIT)#branch=master
+.PHONY: proto-check-breaking-ci
+
+###############################################################################
+###                              Build ABCI                                 ###
+###############################################################################
 
 build_abci:
-	@go build -i ./abci/cmd/...
+	@go build -mod=readonly -i ./abci/cmd/...
+.PHONY: build_abci
 
 install_abci:
-	@go install ./abci/cmd/...
+	@go install -mod=readonly ./abci/cmd/...
+.PHONY: install_abci
 
-########################################
-### Distribution
+###############################################################################
+###                              Distribution                               ###
+###############################################################################
 
 # dist builds binaries for all platforms and packages them for distribution
 # TODO add abci to these scripts
 dist:
 	@BUILD_TAGS=$(BUILD_TAGS) sh -c "'$(CURDIR)/scripts/dist.sh'"
+.PHONY: dist
 
-########################################
-### Tools & dependencies
+go-mod-cache: go.sum
+	@echo "--> Download go modules to local cache"
+	@go mod download
+.PHONY: go-mod-cache
 
-check_tools:
-	@# https://stackoverflow.com/a/25668869
-	@echo "Found tools: $(foreach tool,$(notdir $(GOTOOLS)),\
-        $(if $(shell which $(tool)),$(tool),$(error "No $(tool) in PATH")))"
-
-get_tools:
-	@echo "--> Installing tools"
-	./scripts/get_tools.sh
-
-get_dev_tools:
-	@echo "--> Downloading linters (this may take awhile)"
-	$(GOPATH)/src/github.com/alecthomas/gometalinter/scripts/install.sh -b $(GOBIN)
-
-update_tools:
-	@echo "--> Updating tools"
-	./scripts/get_tools.sh
-
-#Update dependencies
-get_vendor_deps:
-	@echo "--> Running dep"
-	@dep ensure
-
-#For ABCI and libs
-get_protoc:
-	@# https://github.com/google/protobuf/releases
-	curl -L https://github.com/google/protobuf/releases/download/v3.6.1/protobuf-cpp-3.6.1.tar.gz | tar xvz && \
-		cd protobuf-3.6.1 && \
-		DIST_LANG=cpp ./configure && \
-		make && \
-		make check && \
-		sudo make install && \
-		sudo ldconfig && \
-		cd .. && \
-		rm -rf protobuf-3.6.1
+go.sum: go.mod
+	@echo "--> Ensure dependencies have not been modified"
+	@go mod verify
+	@go mod tidy
 
 draw_deps:
 	@# requires brew install graphviz or apt-get install graphviz
 	go get github.com/RobotsAndPencils/goviz
 	@goviz -i github.com/tendermint/tendermint/cmd/tendermint -d 3 | dot -Tpng -o dependency-graph.png
+.PHONY: draw_deps
 
 get_deps_bin_size:
 	@# Copy of build recipe with additional flags to perform binary size analysis
-	$(eval $(shell go build -work -a $(BUILD_FLAGS) -tags $(BUILD_TAGS) -o build/tendermint ./cmd/tendermint/ 2>&1))
+	$(eval $(shell go build -work -a $(BUILD_FLAGS) -tags $(BUILD_TAGS) -o $(OUTPUT) ./cmd/tendermint/ 2>&1))
 	@find $(WORK) -type f -name "*.a" | xargs -I{} du -hxs "{}" | sort -rh | sed -e s:${WORK}/::g > deps_bin_size.log
 	@echo "Results can be found here: $(CURDIR)/deps_bin_size.log"
+.PHONY: get_deps_bin_size
 
-########################################
-### Libs
-
-protoc_libs: libs/common/types.pb.go
+###############################################################################
+###                                  Libs                                   ###
+###############################################################################
 
+# generates certificates for TLS testing in remotedb and RPC server
 gen_certs: clean_certs
-	## Generating certificates for TLS testing...
 	certstrap init --common-name "tendermint.com" --passphrase ""
-	certstrap request-cert -ip "::" --passphrase ""
-	certstrap sign "::" --CA "tendermint.com" --passphrase ""
-	mv out/::.crt out/::.key db/remotedb
-
-clean_certs:
-	## Cleaning TLS testing certificates...
+	certstrap request-cert --common-name "server" -ip "127.0.0.1" --passphrase ""
+	certstrap sign "server" --CA "tendermint.com" --passphrase ""
+	mv out/server.crt rpc/jsonrpc/server/test.crt
+	mv out/server.key rpc/jsonrpc/server/test.key
 	rm -rf out
-	rm -f db/remotedb/::.crt db/remotedb/::.key
+.PHONY: gen_certs
 
-test_libs: gen_certs
-	GOCACHE=off go test -tags gcc $(PACKAGES)
-	make clean_certs
+# deletes generated certificates
+clean_certs:
+	rm -f rpc/jsonrpc/server/test.crt
+	rm -f rpc/jsonrpc/server/test.key
+.PHONY: clean_certs
 
-grpc_dbserver:
-	protoc -I db/remotedb/proto/ db/remotedb/proto/defs.proto --go_out=plugins=grpc:db/remotedb/proto
+###############################################################################
+###                  Formatting, linting, and vetting                       ###
+###############################################################################
 
-protoc_grpc: rpc/grpc/types.pb.go
+format:
+	find . -name '*.go' -type f -not -path "*.git*" -not -name '*.pb.go' -not -name '*pb_test.go' | xargs gofmt -w -s
+	find . -name '*.go' -type f -not -path "*.git*"  -not -name '*.pb.go' -not -name '*pb_test.go' | xargs goimports -w -local github.com/tendermint/tendermint
+.PHONY: format
 
-protoc_merkle: crypto/merkle/merkle.pb.go
-
-########################################
-### Testing
-
-## required to be run first by most tests
-build_docker_test_image:
-	docker build -t tester -f ./test/docker/Dockerfile .
-
-### coverage, app, persistence, and libs tests
-test_cover:
-	# run the go unit tests with coverage
-	bash test/test_cover.sh
-
-test_apps:
-	# run the app tests using bash
-	# requires `abci-cli` and `tendermint` binaries installed
-	bash test/app/test.sh
-
-test_abci_apps:
-	bash abci/tests/test_app/test.sh
-
-test_abci_cli:
-	# test the cli against the examples in the tutorial at:
-	# ./docs/abci-cli.md
-	# if test fails, update the docs ^
-	@ bash abci/tests/test_cli/test.sh
-
-test_persistence:
-	# run the persistence tests using bash
-	# requires `abci-cli` installed
-	docker run --name run_persistence -t tester bash test/persist/test_failure_indices.sh
-
-	# TODO undockerize
-	# bash test/persist/test_failure_indices.sh
-
-test_p2p:
-	docker rm -f rsyslog || true
-	rm -rf test/logs || true
-	mkdir test/logs
-	cd test/
-	docker run -d -v "logs:/var/log/" -p 127.0.0.1:5514:514/udp --name rsyslog voxxit/rsyslog
-	cd ..
-	# requires 'tester' the image from above
-	bash test/p2p/test.sh tester
-	# the `docker cp` takes a really long time; uncomment for debugging
-	#
-	# mkdir -p test/p2p/logs && docker cp rsyslog:/var/log test/p2p/logs
-
-test_integrations:
-	make build_docker_test_image
-	make get_tools
-	make get_vendor_deps
-	make install
-	make test_cover
-	make test_apps
-	make test_abci_apps
-	make test_abci_cli
-	make test_libs
-	make test_persistence
-	make test_p2p
-
-test_release:
-	@go test -tags release $(PACKAGES)
-
-test100:
-	@for i in {1..100}; do make test; done
-
-vagrant_test:
-	vagrant up
-	vagrant ssh -c 'make test_integrations'
-
-### go tests
-test:
-	@echo "--> Running go test"
-	@GOCACHE=off go test -p 1 $(PACKAGES)
-
-test_race:
-	@echo "--> Running go test --race"
-	@GOCACHE=off go test -p 1 -v -race $(PACKAGES)
-
-
-########################################
-### Formatting, linting, and vetting
-
-fmt:
-	@go fmt ./...
-
-metalinter:
+lint:
 	@echo "--> Running linter"
-	@gometalinter $(LINT_FLAGS) --disable-all  \
-		--enable=deadcode \
-		--enable=gosimple \
-	 	--enable=misspell \
-		--enable=safesql \
-		./...
-		#--enable=gas \
-		#--enable=maligned \
-		#--enable=dupl \
-		#--enable=errcheck \
-		#--enable=goconst \
-		#--enable=gocyclo \
-		#--enable=goimports \
-		#--enable=golint \ <== comments on anything exported
-		#--enable=gotype \
-	 	#--enable=ineffassign \
-	   	#--enable=interfacer \
-	   	#--enable=megacheck \
-	   	#--enable=staticcheck \
-	   	#--enable=structcheck \
-	   	#--enable=unconvert \
-	   	#--enable=unparam \
-		#--enable=unused \
-	   	#--enable=varcheck \
-		#--enable=vet \
-		#--enable=vetshadow \
-
-metalinter_all:
-	@echo "--> Running linter (all)"
-	gometalinter $(LINT_FLAGS) --enable-all --disable=lll ./...
+	@golangci-lint run
+.PHONY: lint
 
 DESTINATION = ./index.html.md
 
-rpc-docs:
-	cat rpc/core/slate_header.txt > $(DESTINATION)
-	godoc2md -template rpc/core/doc_template.txt github.com/tendermint/tendermint/rpc/core | grep -v -e "pipe.go" -e "routes.go" -e "dev.go" | sed 's,/src/target,https://github.com/tendermint/tendermint/tree/master/rpc/core,' >> $(DESTINATION)
+###############################################################################
+###                           Documentation                                 ###
+###############################################################################
 
-check_dep:
-	dep status >> /dev/null
-	!(grep -n branch Gopkg.toml)
+build-docs:
+	@cd docs && \
+	while read -r branch path_prefix; do \
+		(git checkout $${branch} && npm ci && VUEPRESS_BASE="/$${path_prefix}/" npm run build) ; \
+		mkdir -p ~/output/$${path_prefix} ; \
+		cp -r .vuepress/dist/* ~/output/$${path_prefix}/ ; \
+		cp ~/output/$${path_prefix}/index.html ~/output ; \
+	done < versions ;
+.PHONY: build-docs
 
-###########################################################
-### Docker image
+sync-docs:
+	cd ~/output && \
+	echo "role_arn = ${DEPLOYMENT_ROLE_ARN}" >> /root/.aws/config ; \
+	echo "CI job = ${CIRCLE_BUILD_URL}" >> version.html ; \
+	aws s3 sync . s3://${WEBSITE_BUCKET} --profile terraform --delete ; \
+	aws cloudfront create-invalidation --distribution-id ${CF_DISTRIBUTION_ID} --profile terraform --path "/*" ;
+.PHONY: sync-docs
 
-build-docker:
-	cp build/tendermint DOCKER/tendermint
+###############################################################################
+###                            Docker image                                 ###
+###############################################################################
+
+build-docker: build-linux
+	cp $(OUTPUT) DOCKER/tendermint
 	docker build --label=tendermint --tag="tendermint/tendermint" DOCKER
 	rm -rf DOCKER/tendermint
+.PHONY: build-docker
 
-###########################################################
-### Local testnet using docker
+###############################################################################
+###                       Local testnet using docker                        ###
+###############################################################################
 
 # Build linux binary on other platforms
 build-linux:
 	GOOS=linux GOARCH=amd64 $(MAKE) build
+.PHONY: build-linux
 
 build-docker-localnode:
-	cd networks/local
-	make
-	cd -
+	@cd networks/local && make
+.PHONY: build-docker-localnode
+
+# Runs `make build TENDERMINT_BUILD_OPTIONS=cleveldb` from within an Amazon
+# Linux (v2)-based Docker build container in order to build an Amazon
+# Linux-compatible binary. Produces a compatible binary at ./build/tendermint
+build_c-amazonlinux:
+	$(MAKE) -C ./DOCKER build_amazonlinux_buildimage
+	docker run --rm -it -v `pwd`:/tendermint tendermint/tendermint:build_c-amazonlinux
+.PHONY: build_c-amazonlinux
 
 # Run a 4-node testnet locally
-localnet-start: localnet-stop
-	@if ! [ -f build/node0/config/genesis.json ]; then docker run --rm -v $(CURDIR)/build:/tendermint:Z tendermint/localnode testnet --v 4 --o . --populate-persistent-peers --starting-ip-address 192.167.10.2 ; fi
+localnet-start: localnet-stop build-docker-localnode
+	@if ! [ -f build/node0/config/genesis.json ]; then docker run --rm -v $(CURDIR)/build:/tendermint:Z tendermint/localnode testnet --config /etc/tendermint/config-template.toml --o . --starting-ip-address 192.167.10.2; fi
 	docker-compose up
+.PHONY: localnet-start
 
 # Stop testnet
 localnet-stop:
 	docker-compose down
+.PHONY: localnet-stop
 
-###########################################################
-### Remote full-nodes (sentry) using terraform and ansible
+# Build hooks for dredd, to skip or add information on some steps
+build-contract-tests-hooks:
+ifeq ($(OS),Windows_NT)
+	go build -mod=readonly $(BUILD_FLAGS) -o build/contract_tests.exe ./cmd/contract_tests
+else
+	go build -mod=readonly $(BUILD_FLAGS) -o build/contract_tests ./cmd/contract_tests
+endif
+.PHONY: build-contract-tests-hooks
 
-# Server management
-sentry-start:
-	@if [ -z "$(DO_API_TOKEN)" ]; then echo "DO_API_TOKEN environment variable not set." ; false ; fi
-	@if ! [ -f $(HOME)/.ssh/id_rsa.pub ]; then ssh-keygen ; fi
-	cd networks/remote/terraform && terraform init && terraform apply -var DO_API_TOKEN="$(DO_API_TOKEN)" -var SSH_KEY_FILE="$(HOME)/.ssh/id_rsa.pub"
-	@if ! [ -f $(CURDIR)/build/node0/config/genesis.json ]; then docker run --rm -v $(CURDIR)/build:/tendermint:Z tendermint/localnode testnet --v 0 --n 4 --o . ; fi
-	cd networks/remote/ansible && ANSIBLE_HOST_KEY_CHECKING=False ansible-playbook -i inventory/digital_ocean.py -l sentrynet install.yml
-	@echo "Next step: Add your validator setup in the genesis.json and config.tml files and run \"make sentry-config\". (Public key of validator, chain ID, peer IP and node ID.)"
-
-# Configuration management
-sentry-config:
-	cd networks/remote/ansible && ansible-playbook -i inventory/digital_ocean.py -l sentrynet config.yml -e BINARY=$(CURDIR)/build/tendermint -e CONFIGDIR=$(CURDIR)/build
-
-sentry-stop:
-	@if [ -z "$(DO_API_TOKEN)" ]; then echo "DO_API_TOKEN environment variable not set." ; false ; fi
-	cd networks/remote/terraform && terraform destroy -var DO_API_TOKEN="$(DO_API_TOKEN)" -var SSH_KEY_FILE="$(HOME)/.ssh/id_rsa.pub"
-
-# meant for the CI, inspect script & adapt accordingly
-build-slate:
-	bash scripts/slate.sh
-
-# To avoid unintended conflicts with file names, always add to .PHONY
-# unless there is a reason not to.
-# https://www.gnu.org/software/make/manual/html_node/Phony-Targets.html
-.PHONY: check build build_race build_abci dist install install_abci check_dep check_tools get_tools get_dev_tools update_tools get_vendor_deps draw_deps get_protoc protoc_abci protoc_libs gen_certs clean_certs grpc_dbserver test_cover test_apps test_persistence test_p2p test test_race test_integrations test_release test100 vagrant_test fmt rpc-docs build-linux localnet-start localnet-stop build-docker build-docker-localnode sentry-start sentry-config sentry-stop build-slate protoc_grpc protoc_all build_c install_c
+# Run a nodejs tool to test endpoints against a localnet
+# The command takes care of starting and stopping the network
+# prerequisits: build-contract-tests-hooks build-linux
+# the two build commands were not added to let this command run from generic containers or machines.
+# The binaries should be built beforehand
+contract-tests:
+	dredd
+.PHONY: contract-tests

PHILOSOPHY.md

@@ -0,0 +1,158 @@
+# Design goals
+
+The design goals for Tendermint (and the SDK and related libraries) are:
+
+* Simplicity and Legibility
+* Parallel performance, namely ability to utilize multicore architecture
+* Ability to evolve the codebase bug-free
+* Debuggability
+* Complete correctness that considers all edge cases, esp in concurrency
+* Future-proof modular architecture, message protocol, APIs, and encapsulation
+
+
+## Justification
+
+Legibility is key to maintaining bug-free software as it evolves toward more
+optimizations, more ease of debugging, and additional features.
+
+It is too easy to introduce bugs over time by replacing lines of code with
+those that may panic, which means ideally locks are unlocked by defer
+statements.
+
+For example,
+
+```go
+func (obj *MyObj) something() {
+	mtx.Lock()
+	obj.something = other
+	mtx.Unlock()
+}
+```
+
+It is too easy to refactor the codebase in the future to replace `other` with
+`other.String()` for example, and this may introduce a bug that causes a
+deadlock.  So as much as reasonably possible, we need to be using defer
+statements, even though it introduces additional overhead.
+
+If it is necessary to optimize the unlocking of mutex locks, the solution is
+more modularity via smaller functions, so that defer'd unlocks are scoped
+within a smaller function.
+
+Similarly, idiomatic for-loops should always be preferred over those that use
+custom counters, because it is too easy to evolve the body of a for-loop to
+become more complicated over time, and it becomes more and more difficult to
+assess the correctness of such a for-loop by visual inspection.
+
+
+## On performance
+
+It doesn't matter whether there are alternative implementations that are 2x or
+3x more performant, when the software doesn't work, deadlocks, or if bugs
+cannot be debugged.  By taking advantage of multicore concurrency, the
+Tendermint implementation will at least be an order of magnitude within the
+range of what is theoretically possible.  The design philosophy of Tendermint,
+and the choice of Go as implementation language, is designed to make Tendermint
+implementation the standard specification for concurrent BFT software.
+
+By focusing on the message protocols (e.g. ABCI, p2p messages), and
+encapsulation e.g. IAVL module, (relatively) independent reactors, we are both
+implementing a standard implementation to be used as the specification for
+future implementations in more optimizable languages like Rust, Java, and C++;
+as well as creating sufficiently performant software. Tendermint Core will
+never be as fast as future implementations of the Tendermint Spec, because Go
+isn't designed to be as fast as possible.  The advantage of using Go is that we
+can develop the whole stack of modular components **faster** than in other
+languages.
+
+Furthermore, the real bottleneck is in the application layer, and it isn't
+necessary to support more than a sufficiently decentralized set of validators
+(e.g. 100 ~ 300 validators is sufficient, with delegated bonded PoS).
+
+Instead of optimizing Tendermint performance down to the metal, lets focus on
+optimizing on other matters, namely ability to push feature complete software
+that works well enough, can be debugged and maintained, and can serve as a spec
+for future implementations.
+
+
+## On encapsulation
+
+In order to create maintainable, forward-optimizable software, it is critical
+to develop well-encapsulated objects that have well understood properties, and
+to re-use these easy-to-use-correctly components as building blocks for further
+encapsulated meta-objects.
+
+For example, mutexes are cheap enough for Tendermint's design goals when there
+isn't goroutine contention, so it is encouraged to create concurrency safe
+structures with struct-level mutexes.  If they are used in the context of
+non-concurrent logic, then the performance is good enough.  If they are used in
+the context of concurrent logic, then it will still perform correctly.
+
+Examples of this design principle can be seen in the types.ValidatorSet struct,
+and the rand.Rand struct.  It's one single struct declaration that can be used
+in both concurrent and non-concurrent logic, and due to its well encapsulation,
+it's easy to get the usage of the mutex right.
+
+### example: rand.Rand
+
+`The default Source is safe for concurrent use by multiple goroutines, but
+Sources created by NewSource are not`.  The reason why the default
+package-level source is safe for concurrent use is because it is protected (see
+`lockedSource` in <https://golang.org/src/math/rand/rand.go>).
+
+But we shouldn't rely on the global source, we should be creating our own
+Rand/Source instances and using them, especially for determinism in testing.
+So it is reasonable to have rand.Rand be protected by a mutex.  Whether we want
+our own implementation of Rand is another question, but the answer there is
+also in the affirmative.  Sometimes you want to know where Rand is being used
+in your code, so it becomes a simple matter of dropping in a log statement to
+inject inspectability into Rand usage.  Also, it is nice to be able to extend
+the functionality of Rand with custom methods.  For these reasons, and for the
+reasons which is outlined in this design philosophy document, we should
+continue to use the rand.Rand object, with mutex protection.
+
+Another key aspect of good encapsulation is the choice of exposed vs unexposed
+methods.  It should be clear to the reader of the code, which methods are
+intended to be used in what context, and what safe usage is.  Part of this is
+solved by hiding methods via unexported methods.  Another part of this is
+naming conventions on the methods (e.g. underscores) with good documentation,
+and code organization.  If there are too many exposed methods and it isn't
+clear what methods have what side effects, then there is something wrong about
+the design of abstractions that should be revisited.
+
+
+## On concurrency
+
+In order for Tendermint to remain relevant in the years to come, it is vital
+for Tendermint to take advantage of multicore architectures.  Due to the nature
+of the problem, namely consensus across a concurrent p2p gossip network, and to
+handle RPC requests for a large number of consuming subscribers, it is
+unavoidable for Tendermint development to require expertise in concurrency
+design, especially when it comes to the reactor design, and also for RPC
+request handling.
+
+
+# Guidelines
+
+Here are some guidelines for designing for (sufficient) performance and concurrency:
+
+* Mutex locks are cheap enough when there isn't contention.
+* Do not optimize code without analytical or observed proof that it is in a hot path.
+* Don't over-use channels when mutex locks w/ encapsulation are sufficient.
+* The need to drain channels are often a hint of unconsidered edge cases.
+* The creation of O(N) one-off goroutines is generally technical debt that
+   needs to get addressed sooner than later.  Avoid creating too many
+goroutines as a patch around incomplete concurrency design, or at least be
+aware of the debt and do not invest in the debt.  On the other hand, Tendermint
+is designed to have a limited number of peers (e.g. 10 or 20), so the creation
+of O(C) goroutines per O(P) peers is still O(C\*P=constant).
+* Use defer statements to unlock as much as possible.  If you want to unlock sooner,
+    try to create more modular functions that do make use of defer statements.
+
+# Mantras
+
+* Premature optimization kills
+* Readability is paramount
+* Beautiful is better than fast.
+* In the face of ambiguity, refuse the temptation to guess.
+* In the face of bugs, refuse the temptation to cover the bug.
+* There should be one-- and preferably only one --obvious way to do it.

README.md

@@ -1,152 +1,161 @@
 # Tendermint
 
+![banner](docs/tendermint-core-image.jpg)
+
 [Byzantine-Fault Tolerant](https://en.wikipedia.org/wiki/Byzantine_fault_tolerance)
-[State Machine Replication](https://en.wikipedia.org/wiki/State_machine_replication).
-Or [Blockchain](https://en.wikipedia.org/wiki/Blockchain_(database)) for short.
+[State Machines](https://en.wikipedia.org/wiki/State_machine_replication).
+Or [Blockchain](<https://en.wikipedia.org/wiki/Blockchain_(database)>), for short.
 
 [![version](https://img.shields.io/github/tag/tendermint/tendermint.svg)](https://github.com/tendermint/tendermint/releases/latest)
-[![API Reference](
-https://camo.githubusercontent.com/915b7be44ada53c290eb157634330494ebe3e30a/68747470733a2f2f676f646f632e6f72672f6769746875622e636f6d2f676f6c616e672f6764646f3f7374617475732e737667
-)](https://godoc.org/github.com/tendermint/tendermint)
-[![Go version](https://img.shields.io/badge/go-1.10.4-blue.svg)](https://github.com/moovweb/gvm)
-[![riot.im](https://img.shields.io/badge/riot.im-JOIN%20CHAT-green.svg)](https://riot.im/app/#/room/#tendermint:matrix.org)
+[![API Reference](https://camo.githubusercontent.com/915b7be44ada53c290eb157634330494ebe3e30a/68747470733a2f2f676f646f632e6f72672f6769746875622e636f6d2f676f6c616e672f6764646f3f7374617475732e737667)](https://pkg.go.dev/github.com/tendermint/tendermint)
+[![Go version](https://img.shields.io/badge/go-1.15-blue.svg)](https://github.com/moovweb/gvm)
+[![Discord chat](https://img.shields.io/discord/669268347736686612.svg)](https://discord.gg/AzefAFd)
 [![license](https://img.shields.io/github/license/tendermint/tendermint.svg)](https://github.com/tendermint/tendermint/blob/master/LICENSE)
-[![](https://tokei.rs/b1/github/tendermint/tendermint?category=lines)](https://github.com/tendermint/tendermint)
+[![tendermint/tendermint](https://tokei.rs/b1/github/tendermint/tendermint?category=lines)](https://github.com/tendermint/tendermint)
+[![Sourcegraph](https://sourcegraph.com/github.com/tendermint/tendermint/-/badge.svg)](https://sourcegraph.com/github.com/tendermint/tendermint?badge)
 
-
-Branch    | Tests | Coverage
-----------|-------|----------
-master    | [![CircleCI](https://circleci.com/gh/tendermint/tendermint/tree/master.svg?style=shield)](https://circleci.com/gh/tendermint/tendermint/tree/master) | [![codecov](https://codecov.io/gh/tendermint/tendermint/branch/master/graph/badge.svg)](https://codecov.io/gh/tendermint/tendermint)
-develop   | [![CircleCI](https://circleci.com/gh/tendermint/tendermint/tree/develop.svg?style=shield)](https://circleci.com/gh/tendermint/tendermint/tree/develop) | [![codecov](https://codecov.io/gh/tendermint/tendermint/branch/develop/graph/badge.svg)](https://codecov.io/gh/tendermint/tendermint)
+| Branch | Tests                                                                                                                                                                                                                                                  | Coverage                                                                                                                             | Linting                                                                    |
+| ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------- |
+| master | [![CircleCI](https://circleci.com/gh/tendermint/tendermint/tree/master.svg?style=shield)](https://circleci.com/gh/tendermint/tendermint/tree/master) </br> ![Tests](https://github.com/tendermint/tendermint/workflows/Tests/badge.svg?branch=master) | [![codecov](https://codecov.io/gh/tendermint/tendermint/branch/master/graph/badge.svg)](https://codecov.io/gh/tendermint/tendermint) | ![Lint](https://github.com/tendermint/tendermint/workflows/Lint/badge.svg) |
 
 Tendermint Core is Byzantine Fault Tolerant (BFT) middleware that takes a state transition machine - written in any programming language -
 and securely replicates it on many machines.
 
-For protocol details, see [the specification](/docs/spec).
+For protocol details, see [the specification](https://github.com/tendermint/spec).
 
 For detailed analysis of the consensus protocol, including safety and liveness proofs,
 see our recent paper, "[The latest gossip on BFT consensus](https://arxiv.org/abs/1807.04938)".
 
-## A Note on Production Readiness
+## Releases
 
-While Tendermint is being used in production in private, permissioned
-environments, we are still working actively to harden and audit it in preparation
-for use in public blockchains, such as the [Cosmos Network](https://cosmos.network/).
-We are also still making breaking changes to the protocol and the APIs.
-Thus, we tag the releases as *alpha software*.
+Please do not depend on master as your production branch. Use [releases](https://github.com/tendermint/tendermint/releases) instead.
 
-In any case, if you intend to run Tendermint in production,
-please [contact us](mailto:partners@tendermint.com) and [join the chat](https://riot.im/app/#/room/#tendermint:matrix.org).
+Tendermint is being used in production in both private and public environments,
+most notably the blockchains of the [Cosmos Network](https://cosmos.network/).
+However, we are still making breaking changes to the protocol and the APIs and have not yet released v1.0.
+See below for more details about [versioning](#versioning).
+
+In any case, if you intend to run Tendermint in production, we're happy to help. You can
+contact us [over email](mailto:hello@interchain.berlin) or [join the chat](https://discord.gg/AzefAFd).
 
 ## Security
 
 To report a security vulnerability, see our [bug bounty
-program](https://hackerone.com/tendermint)
+program](https://hackerone.com/tendermint). 
+For examples of the kinds of bugs we're looking for, see [our security policy](SECURITY.md)
 
-For examples of the kinds of bugs we're looking for, see [SECURITY.md](SECURITY.md)
+We also maintain a dedicated mailing list for security updates. We will only ever use this mailing list
+to notify you of vulnerabilities and fixes in Tendermint Core. You can subscribe [here](http://eepurl.com/gZ5hQD).
 
 ## Minimum requirements
 
-Requirement|Notes
----|---
-Go version | Go1.11.4 or higher
+| Requirement | Notes            |
+| ----------- | ---------------- |
+| Go version  | Go1.15 or higher |
 
 ## Documentation
 
-Complete documentation can be found on the [website](https://tendermint.com/docs/).
+Complete documentation can be found on the [website](https://docs.tendermint.com/master/).
 
 ### Install
 
-See the [install instructions](/docs/introduction/install.md)
+See the [install instructions](/docs/introduction/install.md).
 
 ### Quick Start
 
 - [Single node](/docs/introduction/quick-start.md)
 - [Local cluster using docker-compose](/docs/networks/docker-compose.md)
-- [Remote cluster using terraform and ansible](/docs/networks/terraform-and-ansible.md)
+- [Remote cluster using Terraform and Ansible](/docs/networks/terraform-and-ansible.md)
 - [Join the Cosmos testnet](https://cosmos.network/testnet)
 
+## Contributing
+
+Please abide by the [Code of Conduct](CODE_OF_CONDUCT.md) in all interactions.
+
+Before contributing to the project, please take a look at the [contributing guidelines](CONTRIBUTING.md)
+and the [style guide](STYLE_GUIDE.md). You may also find it helpful to read the
+[specifications](https://github.com/tendermint/spec), watch the [Developer Sessions](/docs/DEV_SESSIONS.md), 
+and familiarize yourself with our
+[Architectural Decision Records](https://github.com/tendermint/tendermint/tree/master/docs/architecture).
+
+## Versioning
+
+### Semantic Versioning
+
+Tendermint uses [Semantic Versioning](http://semver.org/) to determine when and how the version changes.
+According to SemVer, anything in the public API can change at any time before version 1.0.0
+
+To provide some stability to Tendermint users in these 0.X.X days, the MINOR version is used
+to signal breaking changes across a subset of the total public API. This subset includes all
+interfaces exposed to other processes (cli, rpc, p2p, etc.), but does not
+include the Go APIs.
+
+That said, breaking changes in the following packages will be documented in the
+CHANGELOG even if they don't lead to MINOR version bumps:
+
+- crypto
+- config
+- libs
+    - bech32
+    - bits
+    - bytes
+    - json
+    - log
+    - math
+    - net
+    - os
+    - protoio
+    - rand
+    - sync
+    - strings
+    - service
+- node
+- rpc/client
+- types
+
+### Upgrades
+
+In an effort to avoid accumulating technical debt prior to 1.0.0,
+we do not guarantee that breaking changes (ie. bumps in the MINOR version)
+will work with existing Tendermint blockchains. In these cases you will
+have to start a new blockchain, or write something custom to get the old
+data into the new chain. However, any bump in the PATCH version should be 
+compatible with existing blockchain histories.
+
+
+For more information on upgrading, see [UPGRADING.md](./UPGRADING.md).
+
+### Supported Versions
+
+Because we are a small core team, we only ship patch updates, including security updates,
+to the most recent minor release and the second-most recent minor release. Consequently,
+we strongly recommend keeping Tendermint up-to-date. Upgrading instructions can be found
+in [UPGRADING.md](./UPGRADING.md).
+
 ## Resources
 
 ### Tendermint Core
 
 For details about the blockchain data structures and the p2p protocols, see the
-the [Tendermint specification](/docs/spec).
+[Tendermint specification](https://docs.tendermint.com/master/spec/).
 
 For details on using the software, see the [documentation](/docs/) which is also
-hosted at: https://tendermint.com/docs/
+hosted at: <https://docs.tendermint.com/master/>
 
 ### Tools
 
-Benchmarking and monitoring is provided by `tm-bench` and `tm-monitor`, respectively.
-Their code is found [here](/tools) and these binaries need to be built seperately.
-Additional documentation is found [here](/docs/tools).
-
-### Sub-projects
-
-* [Amino](http://github.com/tendermint/go-amino), a reflection-based improvement on proto3
-* [IAVL](http://github.com/tendermint/iavl), Merkleized IAVL+ Tree implementation
+Benchmarking is provided by [`tm-load-test`](https://github.com/informalsystems/tm-load-test).
+Additional tooling can be found in [/docs/tools](/docs/tools).
 
 ### Applications
 
-* [Cosmos SDK](http://github.com/cosmos/cosmos-sdk); a cryptocurrency application framework
-* [Ethermint](http://github.com/cosmos/ethermint); Ethereum on Tendermint
-* [Many more](https://tendermint.com/ecosystem)
+- [Cosmos SDK](http://github.com/cosmos/cosmos-sdk); a cryptocurrency application framework
+- [Ethermint](http://github.com/cosmos/ethermint); Ethereum on Tendermint
+- [Many more](https://tendermint.com/ecosystem)
 
 ### Research
 
-* [The latest gossip on BFT consensus](https://arxiv.org/abs/1807.04938)
-* [Master's Thesis on Tendermint](https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9769)
-* [Original Whitepaper](https://tendermint.com/static/docs/tendermint.pdf)
-* [Blog](https://blog.cosmos.network/tendermint/home)
-
-## Contributing
-
-Yay open source! Please see our [contributing guidelines](CONTRIBUTING.md).
-
-## Versioning
-
-### SemVer
-
-Tendermint uses [SemVer](http://semver.org/) to determine when and how the version changes.
-According to SemVer, anything in the public API can change at any time before version 1.0.0
-
-To provide some stability to Tendermint users in these 0.X.X days, the MINOR version is used
-to signal breaking changes across a subset of the total public API. This subset includes all
-interfaces exposed to other processes (cli, rpc, p2p, etc.), but does not
-include the in-process Go APIs.
-
-That said, breaking changes in the following packages will be documented in the
-CHANGELOG even if they don't lead to MINOR version bumps:
-
-- types
-- rpc/client
-- config
-- node
-- libs
-  - bech32
-  - common
-  - db
-  - errors
-  - log
-
-Exported objects in these packages that are not covered by the versioning scheme
-are explicitly marked by `// UNSTABLE` in their go doc comment and may change at any
-time without notice. Functions, types, and values in any other package may also change at any time.
-
-### Upgrades
-
-In an effort to avoid accumulating technical debt prior to 1.0.0,
-we do not guarantee that breaking changes (ie. bumps in the MINOR version)
-will work with existing tendermint blockchains. In these cases you will
-have to start a new blockchain, or write something custom to get the old
-data into the new chain.
-
-However, any bump in the PATCH version should be compatible with existing histories
-(if not please open an [issue](https://github.com/tendermint/tendermint/issues)).
-
-For more information on upgrading, see [here](./UPGRADING.md)
-
-## Code of Conduct
-
-Please read, understand and adhere to our [code of conduct](CODE_OF_CONDUCT.md).
+- [The latest gossip on BFT consensus](https://arxiv.org/abs/1807.04938)
+- [Master's Thesis on Tendermint](https://atrium.lib.uoguelph.ca/xmlui/handle/10214/9769)
+- [Original Whitepaper: "Tendermint: Consensus Without Mining"](https://tendermint.com/static/docs/tendermint.pdf)
+- [Blog](https://blog.cosmos.network/tendermint/home)

ROADMAP.md

@@ -1,23 +0,0 @@
-# Roadmap
-
-BREAKING CHANGES:
-- Better support for injecting randomness
-- Upgrade consensus for more real-time use of evidence
-
-FEATURES:
-- Use the chain as its own CA for nodes and validators
-- Tooling to run multiple blockchains/apps, possibly in a single process
-- State syncing (without transaction replay)
-- Add authentication and rate-limitting to the RPC
-
-IMPROVEMENTS:
-- Improve subtleties around mempool caching and logic
-- Consensus optimizations:
-	- cache block parts for faster agreement after round changes
-	- propagate block parts rarest first
-- Better testing of the consensus state machine (ie. use a DSL)
-- Auto compiled serialization/deserialization code instead of go-wire reflection
-
-BUG FIXES:
-- Graceful handling/recovery for apps that have non-determinism or fail to halt
-- Graceful handling/recovery for violations of safety, or liveness

SECURITY.md

@@ -1,72 +1,154 @@
 # Security
 
+## Reporting a Bug
+
 As part of our [Coordinated Vulnerability Disclosure
 Policy](https://tendermint.com/security), we operate a [bug
 bounty](https://hackerone.com/tendermint).
-See the policy for more details on submissions and rewards.
+See the policy for more details on submissions and rewards, and see "Example Vulnerabilities" (below) for examples of the kinds of bugs we're most interested in.
 
-Here is a list of examples of the kinds of bugs we're most interested in:
+### Guidelines 
 
-## Specification
+We require that all researchers:
 
-- Conceptual flaws
-- Ambiguities, inconsistencies, or incorrect statements
-- Mis-match between specification and implementation of any component
+* Use the bug bounty to disclose all vulnerabilities, and avoid posting vulnerability information in public places, including Github Issues, Discord channels, and Telegram groups
+* Make every effort to avoid privacy violations, degradation of user experience, disruption to production systems (including but not limited to the Cosmos Hub), and destruction of data
+* Keep any information about vulnerabilities that you’ve discovered confidential between yourself and the Tendermint Core engineering team until the issue has been resolved and disclosed 
+* Avoid posting personally identifiable information, privately or publicly
 
-## Consensus
+If you follow these guidelines when reporting an issue to us, we commit to:
+
+* Not pursue or support any legal action related to your research on this vulnerability
+* Work with you to understand, resolve and ultimately disclose the issue in a timely fashion 
+
+## Disclosure Process 
+
+Tendermint Core uses the following disclosure process:
+
+1. Once a security report is received, the Tendermint Core team works to verify the issue and confirm its severity level using CVSS. 
+2. The Tendermint Core team collaborates with the Gaia team to determine the vulnerability’s potential impact on the Cosmos Hub. 
+3. Patches are prepared for eligible releases of Tendermint in private repositories. See “Supported Releases” below for more information on which releases are considered eligible. 
+4. If it is determined that a CVE-ID is required, we request a CVE through a CVE Numbering Authority. 
+5. We notify the community that a security release is coming, to give users time to prepare their systems for the update. Notifications can include forum posts, tweets, and emails to partners and validators, including emails sent to the [Tendermint Security Mailing List](https://berlin.us4.list-manage.com/subscribe?u=431b35421ff7edcc77df5df10&id=3fe93307bc).
+6. 24 hours following this notification, the fixes are applied publicly and new releases are issued. 
+7. Cosmos SDK and Gaia update their Tendermint Core dependencies to use these releases, and then themselves issue new releases. 
+8. Once releases are available for Tendermint Core, Cosmos SDK and Gaia, we notify the community, again, through the same channels as above. We also publish a Security Advisory on Github and publish the CVE, as long as neither the Security Advisory nor the CVE include any information on how to exploit these vulnerabilities beyond what information is already available in the patch itself. 
+9. Once the community is notified, we will pay out any relevant bug bounties to submitters. 
+10. One week after the releases go out, we will publish a post with further details on the vulnerability as well as our response to it. 
+
+This process can take some time. Every effort will be made to handle the bug in as timely a manner as possible, however it's important that we follow the process described above to ensure that disclosures are handled consistently and to keep Tendermint Core and its downstream dependent projects--including but not limited to Gaia and the Cosmos Hub--as secure as possible. 
+
+### Example Timeline 
+
+The following is an example timeline for the triage and response. The required roles and team members are described in parentheses after each task; however, multiple people can play each role and each person may play multiple roles. 
+
+#### > 24 Hours Before Release Time
+
+1. Request CVE number (ADMIN) 
+2. Gather emails and other contact info for validators (COMMS LEAD) 
+3. Test fixes on a testnet  (TENDERMINT ENG, COSMOS ENG) 
+4. Write “Security Advisory” for forum (TENDERMINT LEAD) 
+
+#### 24 Hours Before Release Time
+
+1. Post “Security Advisory” pre-notification on forum (TENDERMINT LEAD) 
+2. Post Tweet linking to forum post (COMMS LEAD) 
+3. Announce security advisory/link to post in various other social channels (Telegram, Discord) (COMMS LEAD) 
+4. Send emails to validators or other users (PARTNERSHIPS LEAD) 
+
+#### Release Time
+
+1. Cut Tendermint releases for eligible versions (TENDERMINT ENG, TENDERMINT LEAD)
+2. Cut Cosmos SDK release for eligible versions (COSMOS ENG)
+3. Cut Gaia release for eligible versions (GAIA ENG)
+4. Post “Security releases” on forum (TENDERMINT LEAD)
+5. Post new Tweet linking to forum post (COMMS LEAD)
+6. Remind everyone via social channels (Telegram, Discord)  that the release is out (COMMS LEAD)
+7. Send emails to validators or other users (COMMS LEAD) 
+8. Publish Security Advisory and CVE, if CVE has no sensitive information (ADMIN) 
+
+#### After Release Time
+
+1. Write forum post with exploit details (TENDERMINT LEAD)
+2. Approve pay-out on HackerOne for submitter (ADMIN) 
+
+#### 7 Days After Release Time
+
+1. Publish CVE if it has not yet been published (ADMIN) 
+2. Publish forum post with exploit details (TENDERMINT ENG, TENDERMINT LEAD)
+
+## Supported Releases
+
+The Tendermint Core team commits to releasing security patch releases for both the latest minor release as well for the major/minor release that the Cosmos Hub is running. 
+
+If you are running older versions of Tendermint Core, we encourage you to upgrade at your earliest opportunity so that you can receive security patches directly from the Tendermint repo. While you are welcome to backport security patches to older versions for your own use, we will not publish or promote these backports. 
+
+## Scope
+
+The full scope of our bug bounty program is outlined on our [Hacker One program page](https://hackerone.com/tendermint). Please also note that, in the interest of the safety of our users and staff, a few things are explicitly excluded from scope:
+
+* Any third-party services 
+* Findings from physical testing, such as office access 
+* Findings derived from social engineering (e.g., phishing)
+
+## Example Vulnerabilities 
+
+The following is a list of examples of the kinds of vulnerabilities that we’re most interested in. It is not exhaustive: there are other kinds of issues we may also be interested in! 
+
+### Specification
+
+* Conceptual flaws
+* Ambiguities, inconsistencies, or incorrect statements
+* Mis-match between specification and implementation of any component
+
+### Consensus
 
 Assuming less than 1/3 of the voting power is Byzantine (malicious):
 
-- Validation of blockchain data structures, including blocks, block parts,
-  votes, and so on
-- Execution of blocks
-- Validator set changes
-- Proposer round robin
-- Two nodes committing conflicting blocks for the same height (safety failure)
-- A correct node signing conflicting votes
-- A node halting (liveness failure)
-- Syncing new and old nodes
-
-## Networking
-
-- Authenticated encryption (MITM, information leakage)
-- Eclipse attacks
-- Sybil attacks
-- Long-range attacks
-- Denial-of-Service
-
-## RPC
-
-- Write-access to anything besides sending transactions
-- Denial-of-Service
-- Leakage of secrets
-
-## Denial-of-Service
-
-Attacks may come through the P2P network or the RPC:
-
-- Amplification attacks
-- Resource abuse
-- Deadlocks and race conditions
-- Panics and unhandled errors
-
-## Libraries
-
-- Serialization (Amino)
-- Reading/Writing files and databases
-- Logging and monitoring
-
-## Cryptography
-
-- Elliptic curves for validator signatures
-- Hash algorithms and Merkle trees for block validation
-- Authenticated encryption for P2P connections
-
-## Light Client
-
-- Validation of blockchain data structures
-- Correctly validating an incorrect proof
-- Incorrectly validating a correct proof
-- Syncing validator set changes
+* Validation of blockchain data structures, including blocks, block parts, votes, and so on
+* Execution of blocks
+* Validator set changes
+* Proposer round robin
+* Two nodes committing conflicting blocks for the same height (safety failure)
+* A correct node signing conflicting votes
+* A node halting (liveness failure)
+* Syncing new and old nodes
 
 
+### Networking
+
+* Authenticated encryption (MITM, information leakage)
+* Eclipse attacks
+* Sybil attacks
+* Long-range attacks
+* Denial-of-Service
+
+### RPC
+
+* Write-access to anything besides sending transactions
+* Denial-of-Service
+* Leakage of secrets
+
+### Denial-of-Service
+
+Attacks may come through the P2P network or the RPC layer:
+
+* Amplification attacks
+* Resource abuse
+* Deadlocks and race conditions
+
+### Libraries
+
+* Serialization (Amino)
+* Reading/Writing files and databases
+
+### Cryptography
+
+* Elliptic curves for validator signatures
+* Hash algorithms and Merkle trees for block validation
+* Authenticated encryption for P2P connections
+
+### Light Client
+
+* Core verification 
+* Bisection/sequential algorithms

STYLE_GUIDE.md

@@ -0,0 +1,162 @@
+# Go Coding Style Guide
+
+In order to keep our code looking good with lots of programmers working on it, it helps to have a "style guide", so all
+the code generally looks quite similar. This doesn't mean there is only one "right way" to write code, or even that this
+standard is better than your style.  But if we agree to a number of stylistic practices, it makes it much easier to read
+and modify new code. Please feel free to make suggestions if there's something you would like to add or modify.
+
+We expect all contributors to be familiar with [Effective Go](https://golang.org/doc/effective_go.html)
+(and it's recommended reading for all Go programmers anyways). Additionally, we generally agree with the suggestions
+ in [Uber's style guide](https://github.com/uber-go/guide/blob/master/style.md) and use that as a starting point.
+
+
+## Code Structure
+
+Perhaps more key for code readability than good commenting is having the right structure. As a rule of thumb, try to write
+in a logical order of importance, taking a little time to think how to order and divide the code such that someone could
+scroll down and understand the functionality of it just as well as you do. A loose example of such order would be:
+
+* Constants, global and package-level variables
+* Main Struct
+* Options (only if they are seen as critical to the struct else they should be placed in another file)
+* Initialization / Start and stop of the service
+* Msgs/Events
+* Public Functions (In order of most important)
+* Private/helper functions
+* Auxiliary structs and function (can also be above private functions or in a separate file)
+
+## General
+
+* Use `gofmt` (or `goimport`) to format all code upon saving it.  (If you use VIM, check out vim-go).
+* Use a linter (see below) and generally try to keep the linter happy (where it makes sense).
+* Think about documentation, and try to leave godoc comments, when it will help new developers.
+* Every package should have a high level doc.go file to describe the purpose of that package, its main functions, and any other relevant information.
+* `TODO` should not be used. If important enough should be recorded as an issue.
+* `BUG` / `FIXME` should be used sparingly to guide future developers on some of the vulnerabilities of the code.
+* `XXX` can be used in work-in-progress (prefixed with "WIP:" on github) branches but they must be removed before approving a PR.
+* Applications (e.g. clis/servers) *should* panic on unexpected unrecoverable errors and print a stack trace.
+
+## Comments
+
+* Use a space after comment deliminter (ex. `// your comment`).
+* Many comments are not sentences. These should begin with a lower case letter and end without a period.
+* Conversely, sentences in comments should be sentenced-cased and end with a period.
+
+## Linters
+
+These must be applied to all (Go) repos.
+
+* [shellcheck](https://github.com/koalaman/shellcheck)
+* [golangci-lint](https://github.com/golangci/golangci-lint) (covers all important linters)
+    * See the `.golangci.yml` file in each repo for linter configuration.
+
+## Various
+
+* Reserve "Save" and "Load" for long-running persistence operations. When parsing bytes, use "Encode" or "Decode".
+* Maintain consistency across the codebase.
+* Functions that return functions should have the suffix `Fn`
+* Names should not [stutter](https://blog.golang.org/package-names). For example, a struct generally shouldn’t have
+  a field named after itself; e.g., this shouldn't occur:
+
+``` golang
+type middleware struct {
+	middleware Middleware
+}
+```
+
+* In comments, use "iff" to mean, "if and only if".
+* Product names are capitalized, like "Tendermint", "Basecoin", "Protobuf", etc except in command lines: `tendermint --help`
+* Acronyms are all capitalized, like "RPC", "gRPC", "API".  "MyID", rather than "MyId".
+* Prefer errors.New() instead of fmt.Errorf() unless you're actually using the format feature with arguments.
+
+## Importing Libraries
+
+Sometimes it's necessary to rename libraries to avoid naming collisions or ambiguity.
+
+* Use [goimports](https://godoc.org/golang.org/x/tools/cmd/goimports)
+* Separate imports into blocks - one for the standard lib, one for external libs and one for application libs.
+* Here are some common library labels for consistency:
+    * dbm "github.com/tendermint/tm-db"
+    * tmcmd "github.com/tendermint/tendermint/cmd/tendermint/commands"
+    * tmcfg "github.com/tendermint/tendermint/config/tendermint"
+    * tmtypes "github.com/tendermint/tendermint/types"
+* Never use anonymous imports (the `.`), for example, `tmlibs/common` or anything else.
+* When importing a pkg from the `tendermint/libs` directory, prefix the pkg alias with tm.
+    * tmbits "github.com/tendermint/tendermint/libs/bits"
+* tip: Use the `_` library import to import a library for initialization effects (side effects)
+
+## Dependencies
+
+* Dependencies should be pinned by a release tag, or specific commit, to avoid breaking `go get` when external dependencies are updated.
+* Refer to the [contributing](CONTRIBUTING.md) document for more details
+
+## Testing
+
+* The first rule of testing is: we add tests to our code
+* The second rule of testing is: we add tests to our code
+* For Golang testing:
+    * Make use of table driven testing where possible and not-cumbersome
+        * [Inspiration](https://dave.cheney.net/2013/06/09/writing-table-driven-tests-in-go)
+    * Make use of [assert](https://godoc.org/github.com/stretchr/testify/assert) and [require](https://godoc.org/github.com/stretchr/testify/require)
+* When using mocks, it is recommended to use Testify [mock] (<https://pkg.go.dev/github.com/stretchr/testify/mock>
+ ) along with [Mockery](https://github.com/vektra/mockery) for autogeneration
+
+## Errors
+
+* Ensure that errors are concise, clear and traceable.
+* Use stdlib errors package.
+* For wrapping errors, use `fmt.Errorf()` with `%w`.
+* Panic is appropriate when an internal invariant of a system is broken, while all other cases (in particular,
+  incorrect or invalid usage) should return errors.
+
+## Config
+
+* Currently the TOML filetype is being used for config files
+* A good practice is to store per-user config files under `~/.[yourAppName]/config.toml`
+
+## CLI
+
+* When implementing a CLI use [Cobra](https://github.com/spf13/cobra) and [Viper](https://github.com/spf13/viper).
+* Helper messages for commands and flags must be all lowercase.
+* Instead of using pointer flags (eg. `FlagSet().StringVar`) use Viper to retrieve flag values (eg. `viper.GetString`)
+    * The flag key used when setting and getting the flag should always be stored in a
+   variable taking the form `FlagXxx` or `flagXxx`.
+    * Flag short variable descriptions should always start with a lower case character as to remain consistent with
+   the description provided in the default `--help` flag.
+
+## Version
+
+* Every repo should have a version/version.go file that mimics the Tendermint Core repo
+* We read the value of the constant version in our build scripts and hence it has to be a string
+
+## Non-Go Code
+
+* All non-Go code (`*.proto`, `Makefile`, `*.sh`), where there is no common
+   agreement on style, should be formatted according to
+   [EditorConfig](http://editorconfig.org/) config:
+
+   ```toml
+   # top-most EditorConfig file
+   root = true
+
+   # Unix-style newlines with a newline ending every file
+   [*]
+   charset = utf-8
+   end_of_line = lf
+   insert_final_newline = true
+   trim_trailing_whitespace = true
+
+   [Makefile]
+   indent_style = tab
+
+   [*.sh]
+   indent_style = tab
+
+   [*.proto]
+   indent_style = space
+   indent_size = 2
+   ```
+
+   Make sure the file above (`.editorconfig`) are in the root directory of your
+   repo and you have a [plugin for your
+   editor](http://editorconfig.org/#download) installed.

UPGRADING.md

@@ -1,7 +1,561 @@
 # Upgrading Tendermint Core
 
-This guide provides steps to be followed when you upgrade your applications to
-a newer version of Tendermint Core.
+This guide provides instructions for upgrading to specific versions of Tendermint Core.
+
+## v0.34.0
+
+**Upgrading to Tendermint 0.34 requires a blockchain restart.**
+This release is not compatible with previous blockchains due to changes to
+the encoding format (see "Protocol Buffers," below) and the block header (see "Blockchain Protocol").
+
+Note also that Tendermint 0.34 also requires Go 1.15 or higher. 
+
+### ABCI Changes
+
+* The `ABCIVersion` is now `0.17.0`.
+
+* New ABCI methods (`ListSnapshots`, `LoadSnapshotChunk`, `OfferSnapshot`, and `ApplySnapshotChunk`)
+  were added to support the new State Sync feature.
+  Previously, syncing a new node to a preexisting network could take days; but with State Sync,
+  new nodes are able to join a network in a matter of seconds.
+  Read [the spec](https://docs.tendermint.com/master/spec/abci/apps.html#state-sync)
+  if you want to learn more about State Sync, or if you'd like your application to use it.
+  (If you don't want to support State Sync in your application, you can just implement these new
+  ABCI methods as no-ops, leaving them empty.)
+
+* `KV.Pair` has been replaced with `abci.EventAttribute`. The `EventAttribute.Index` field
+  allows ABCI applications to dictate which events should be indexed.
+
+* The blockchain can now start from an arbitrary initial height,
+  provided to the application via `RequestInitChain.InitialHeight`.
+
+* ABCI evidence type is now an enum with two recognized types of evidence:
+  `DUPLICATE_VOTE` and `LIGHT_CLIENT_ATTACK`.
+  Applications should be able to handle these evidence types
+  (i.e., through slashing or other accountability measures).
+
+* The [`PublicKey` type](https://github.com/tendermint/tendermint/blob/master/proto/tendermint/crypto/keys.proto#L13-L15)
+  (used in ABCI as part of `ValidatorUpdate`) now uses a `oneof` protobuf type.
+  Note that since Tendermint only supports ed25519 validator keys, there's only one
+  option in the `oneof`.  For more, see "Protocol Buffers," below.
+
+* The field `Proof`, on the ABCI type `ResponseQuery`, is now named `ProofOps`.
+  For more, see "Crypto," below.
+
+### P2P Protocol
+
+The default codec is now proto3, not amino. The schema files can be found in the `/proto`
+directory. For more, see "Protobuf," below.
+
+### Blockchain Protocol
+
+* `Header#LastResultsHash` previously was the root hash of a Merkle tree built from `ResponseDeliverTx(Code, Data)` responses.
+  As of 0.34,`Header#LastResultsHash` is now the root hash of a Merkle tree built from:
+    * `BeginBlock#Events`
+    * Root hash of a Merkle tree built from `ResponseDeliverTx(Code, Data,
+      GasWanted, GasUsed, Events)` responses
+    * `BeginBlock#Events`
+
+* Merkle hashes of empty trees previously returned nothing, but now return the hash of an empty input,
+  to conform with [RFC-6962](https://tools.ietf.org/html/rfc6962).
+  This mainly affects `Header#DataHash`, `Header#LastResultsHash`, and
+  `Header#EvidenceHash`, which are often empty. Non-empty hashes can also be affected, e.g. if their
+  inputs depend on other (empty) Merkle hashes, giving different results.
+
+### Transaction Indexing
+
+Tendermint now relies on the application to tell it which transactions to index. This means that
+in the `config.toml`, generated by Tendermint, there is no longer a way to specify which
+transactions to index. `tx.height` and `tx.hash` will always be indexed when using the `kv` indexer.
+
+Applications must now choose to either a) enable indexing for all transactions, or
+b) allow node operators to decide which transactions to index.
+Applications can notify Tendermint to index a specific transaction by setting
+`Index: bool` to `true` in the Event Attribute:
+
+```go
+[]types.Event{
+	{
+		Type: "app",
+		Attributes: []types.EventAttribute{
+			{Key: []byte("creator"), Value: []byte("Cosmoshi Netowoko"), Index: true},
+		},
+	},
+}
+```
+
+### Protocol Buffers
+
+Tendermint 0.34 replaces Amino with Protocol Buffers for encoding.
+This migration is extensive and results in a number of changes, however,
+Tendermint only uses the types generated from Protocol Buffers for disk and
+wire serialization.
+**This means that these changes should not affect you as a Tendermint user.**
+
+However, Tendermint users and contributors may note the following changes:
+
+* Directory layout changes: All proto files have been moved under one directory, `/proto`.
+  This is in line with the recommended file layout by [Buf](https://buf.build).
+  For more, see the [Buf documentation](https://buf.build/docs/lint-checkers#file_layout).
+* ABCI Changes: As noted in the "ABCI Changes" section above, the `PublicKey` type now uses
+  a `oneof` type.
+
+For more on the Protobuf changes, please see our [blog post on this migration](https://medium.com/tendermint/tendermint-0-34-protocol-buffers-and-you-8c40558939ae).
+
+### Consensus Parameters
+
+Tendermint 0.34 includes new and updated consensus parameters.
+
+#### Version Parameters (New)
+
+* `AppVersion`, which is the version of the ABCI application.
+
+#### Evidence Parameters
+
+* `MaxBytes`, which caps the total amount of evidence. The default is 1048576 (1 MB). 
+
+### Crypto
+
+#### Keys
+
+* Keys no longer include a type prefix. For example, ed25519 pubkeys have been renamed from
+  `PubKeyEd25519` to `PubKey`. This reduces stutter (e.g., `ed25519.PubKey`).
+* Keys are now byte slices (`[]byte`) instead of byte arrays (`[<size>]byte`).
+* The multisig functionality that was previously in Tendermint now has
+  a new home within the Cosmos SDK:
+  [`cosmos/cosmos-sdk/types/multisig`](https://github.com/cosmos/cosmos-sdk/blob/master/crypto/types/multisig/multisignature.go).
+
+#### `merkle` Package
+
+* `SimpleHashFromMap()` and `SimpleProofsFromMap()` were removed.
+* The prefix `Simple` has been removed. (For example, `SimpleProof` is now called `Proof`.)
+* All protobuf messages have been moved to the `/proto` directory.
+* The protobuf message `Proof` that contained multiple ProofOp's has been renamed to `ProofOps`.
+  As noted above, this affects the ABCI type `ResponseQuery`:
+  The field that was named Proof is now named `ProofOps`.
+* `HashFromByteSlices` and `ProofsFromByteSlices` now return a hash for empty inputs, to conform with
+  [RFC-6962](https://tools.ietf.org/html/rfc6962).
+
+### `libs` Package
+
+The `bech32` package has moved to the Cosmos SDK:
+[`cosmos/cosmos-sdk/types/bech32`](https://github.com/cosmos/cosmos-sdk/tree/4173ea5ebad906dd9b45325bed69b9c655504867/types/bech32).
+
+### CLI
+
+The `tendermint lite` command has been renamed to `tendermint light` and has a slightly different API.
+See [the docs](https://docs.tendermint.com/master/tendermint-core/light-client-protocol.html#http-proxy) for details.
+
+### Light Client
+
+We have a new, rewritten light client! You can
+[read more](https://medium.com/tendermint/everything-you-need-to-know-about-the-tendermint-light-client-f80d03856f98)
+about the justifications and details behind this change.
+
+Other user-relevant changes include:
+
+* The old `lite` package was removed; the new light client uses the `light` package.
+* The `Verifier` was broken up into two pieces:
+    * Core verification logic (pure `VerifyX` functions)
+    * `Client` object, which represents the complete light client
+* The RPC client can be found in the `/rpc` directory.
+* The HTTP(S) proxy is located in the `/proxy` directory.
+
+### `state` Package
+
+* A new field `State.InitialHeight` has been added to record the initial chain height, which must be `1`
+  (not `0`) if starting from height `1`. This can be configured via the genesis field `initial_height`.
+* The `state` package now has a `Store` interface. All functions in
+  [state/store.go](https://github.com/tendermint/tendermint/blob/56911ee35298191c95ef1c7d3d5ec508237aaff4/state/store.go#L42-L42)
+  are now part of the interface. The interface returns errors on all methods and can be used by calling `state.NewStore(dbm.DB)`.
+
+### `privval` Package
+
+All requests are now accompanied by the chain ID from the network.
+This is a optional field and can be ignored by key management systems;
+however, if you are using the same key management system for multiple different
+blockchains, we recommend that you check the chain ID.
+
+
+### RPC
+
+* `/unsafe_start_cpu_profiler`, `/unsafe_stop_cpu_profiler` and
+  `/unsafe_write_heap_profile` were removed.
+   For profiling, please use the pprof server, which can
+  be enabled through `--rpc.pprof_laddr=X` flag or `pprof_laddr=X` config setting
+  in the rpc section.
+* The `Content-Type` header returned on RPC calls is now (correctly) set as `application/json`.
+
+### Version
+
+Version is now set through Go linker flags `ld_flags`. Applications that are using tendermint as a library should set this at compile time. 
+
+Example:
+
+```sh
+go install -mod=readonly -ldflags "-X github.com/tendermint/tendermint/version.TMCoreSemVer=$(go list -m github.com/tendermint/tendermint | sed  's/ /\@/g') -s -w " -trimpath ./cmd
+```
+
+Additionally, the exported constant `version.Version` is now `version.TMCoreSemVer`. 
+
+## v0.33.4
+
+### Go API
+
+* `rpc/client` HTTP and local clients have been moved into `http` and `local`
+  subpackages, and their constructors have been renamed to `New()`.
+
+### Protobuf Changes
+
+When upgrading to version 0.33.4 you will have to fetch the `third_party`
+directory along with the updated proto files.
+
+### Block Retention
+
+ResponseCommit added a field for block retention. The application can provide information to Tendermint on how to prune blocks.
+If an application would like to not prune any blocks pass a `0` in this field.
+
+```proto
+message ResponseCommit {
+  // reserve 1
+  bytes  data          = 2; // the Merkle root hash
+  ++ uint64 retain_height = 3; // the oldest block height to retain ++
+}
+```
+
+## v0.33.0
+
+This release is not compatible with previous blockchains due to commit becoming
+signatures only and fields in the header have been removed.
+
+### Blockchain Protocol
+
+`TotalTxs` and `NumTxs` were removed from the header. `Commit` now consists
+mostly of just signatures.
+
+```go
+type Commit struct {
+	Height     int64
+	Round      int
+	BlockID    BlockID
+	Signatures []CommitSig
+}
+```
+
+```go
+type BlockIDFlag byte
+
+const (
+	// BlockIDFlagAbsent - no vote was received from a validator.
+	BlockIDFlagAbsent BlockIDFlag = 0x01
+	// BlockIDFlagCommit - voted for the Commit.BlockID.
+	BlockIDFlagCommit = 0x02
+	// BlockIDFlagNil - voted for nil.
+	BlockIDFlagNil = 0x03
+)
+
+type CommitSig struct {
+	BlockIDFlag      BlockIDFlag
+	ValidatorAddress Address
+	Timestamp        time.Time
+	Signature        []byte
+}
+```
+
+See [\#63](https://github.com/tendermint/spec/pull/63) for the complete spec
+change.
+
+### P2P Protocol
+
+The secret connection now includes a transcript hashing. If you want to
+implement a handshake (or otherwise have an existing implementation), you'll
+need to make the same changes that were made
+[here](https://github.com/tendermint/tendermint/pull/3668).
+
+### Config Changes
+
+You will need to generate a new config if you have used a prior version of tendermint.
+
+Tags have been entirely renamed throughout the codebase to events and there
+keys are called
+[compositeKeys](https://github.com/tendermint/tendermint/blob/6d05c531f7efef6f0619155cf10ae8557dd7832f/docs/app-dev/indexing-transactions.md).
+
+Evidence Params has been changed to include duration.
+
+* `consensus_params.evidence.max_age_duration`.
+* Renamed `consensus_params.evidence.max_age` to `max_age_num_blocks`.
+
+### Go API
+
+* `libs/common` has been removed in favor of specific pkgs.
+    * `async`
+    * `service`
+    * `rand`
+    * `net`
+    * `strings`
+    * `cmap`
+* removal of `errors` pkg
+
+### RPC Changes
+
+* `/validators` is now paginated (default: 30 vals per page)
+* `/block_results` response format updated [see RPC docs for details](https://docs.tendermint.com/master/rpc/#/Info/block_results)
+* Event suffix has been removed from the ID in event responses
+* IDs are now integers not `json-client-XYZ`
+
+## v0.32.0
+
+This release is compatible with previous blockchains,
+however the new ABCI Events mechanism may create some complexity
+for nodes wishing to continue operation with v0.32 from a previous version.
+There are some minor breaking changes to the RPC.
+
+### Config Changes
+
+If you have `db_backend` set to `leveldb` in your config file, please change it
+to `goleveldb` or `cleveldb`.
+
+### RPC Changes
+
+The default listen address for the RPC is now `127.0.0.1`. If you want to expose
+it publicly, you have to explicitly configure it. Note exposing the RPC to the
+public internet may not be safe - endpoints which return a lot of data may
+enable resource exhaustion attacks on your node, causing the process to crash.
+
+Any consumers of `/block_results` need to be mindful of the change in all field
+names from CamelCase to Snake case, eg. `results.DeliverTx` is now `results.deliver_tx`.
+This is a fix, but it's breaking.
+
+### ABCI Changes
+
+ABCI responses which previously had a `Tags` field now have an `Events` field
+instead. The original `Tags` field was simply a list of key-value pairs, where
+each key effectively represented some attribute of an event occuring in the
+blockchain, like `sender`, `receiver`, or `amount`. However, it was difficult to
+represent the occurence of multiple events (for instance, multiple transfers) in a single list.
+The new `Events` field contains a list of `Event`, where each `Event` is itself a list
+of key-value pairs, allowing for more natural expression of multiple events in
+eg. a single DeliverTx or EndBlock. Note each `Event` also includes a `Type`, which is meant to categorize the
+event.
+
+For transaction indexing, the index key is
+prefixed with the event type: `{eventType}.{attributeKey}`.
+If the same event type and attribute key appear multiple times, the values are
+appended in a list.
+
+To make queries, include the event type as a prefix. For instance if you
+previously queried for `recipient = 'XYZ'`, and after the upgrade you name your event `transfer`,
+the new query would be for `transfer.recipient = 'XYZ'`.
+
+Note that transactions indexed on a node before upgrading to v0.32 will still be indexed
+using the old scheme. For instance, if a node upgraded at height 100,
+transactions before 100 would be queried with `recipient = 'XYZ'` and
+transactions after 100 would be queried with `transfer.recipient = 'XYZ'`.
+While this presents additional complexity to clients, it avoids the need to
+reindex. Of course, you can reset the node and sync from scratch to re-index
+entirely using the new scheme.
+
+We illustrate further with a more complete example.
+
+Prior to the update, suppose your `ResponseDeliverTx` look like:
+
+```go
+abci.ResponseDeliverTx{
+  Tags: []kv.Pair{
+    {Key: []byte("sender"), Value: []byte("foo")},
+    {Key: []byte("recipient"), Value: []byte("bar")},
+    {Key: []byte("amount"), Value: []byte("35")},
+  }
+}
+```
+
+The following queries would match this transaction:
+
+```go
+query.MustParse("tm.event = 'Tx' AND sender = 'foo'")
+query.MustParse("tm.event = 'Tx' AND recipient = 'bar'")
+query.MustParse("tm.event = 'Tx' AND sender = 'foo' AND recipient = 'bar'")
+```
+
+Following the upgrade, your `ResponseDeliverTx` would look something like:
+the following `Events`:
+
+```go
+abci.ResponseDeliverTx{
+  Events: []abci.Event{
+    {
+      Type: "transfer",
+      Attributes: kv.Pairs{
+        {Key: []byte("sender"), Value: []byte("foo")},
+        {Key: []byte("recipient"), Value: []byte("bar")},
+        {Key: []byte("amount"), Value: []byte("35")},
+      },
+    }
+}
+```
+
+Now the following queries would match this transaction:
+
+```go
+query.MustParse("tm.event = 'Tx' AND transfer.sender = 'foo'")
+query.MustParse("tm.event = 'Tx' AND transfer.recipient = 'bar'")
+query.MustParse("tm.event = 'Tx' AND transfer.sender = 'foo' AND transfer.recipient = 'bar'")
+```
+
+For further documentation on `Events`, see the [docs](https://github.com/tendermint/tendermint/blob/60827f75623b92eff132dc0eff5b49d2025c591e/docs/spec/abci/abci.md#events).
+
+### Go Applications
+
+The ABCI Application interface changed slightly so the CheckTx and DeliverTx
+methods now take Request structs. The contents of these structs are just the raw
+tx bytes, which were previously passed in as the argument.
+
+## v0.31.6
+
+There are no breaking changes in this release except Go API of p2p and
+mempool packages. Hovewer, if you're using cleveldb, you'll need to change
+the compilation tag:
+
+Use `cleveldb` tag instead of `gcc` to compile Tendermint with CLevelDB or
+use `make build_c` / `make install_c` (full instructions can be found at
+<https://tendermint.com/docs/introduction/install.html#compile-with-cleveldb-support>)
+
+## v0.31.0
+
+This release contains a breaking change to the behaviour of the pubsub system.
+It also contains some minor breaking changes in the Go API and ABCI.
+There are no changes to the block or p2p protocols, so v0.31.0 should work fine
+with blockchains created from the v0.30 series.
+
+### RPC
+
+The pubsub no longer blocks on publishing. This may cause some WebSocket (WS) clients to stop working as expected.
+If your WS client is not consuming events fast enough, Tendermint can terminate the subscription.
+In this case, the WS client will receive an error with description:
+
+```json
+{
+  "jsonrpc": "2.0",
+  "id": "{ID}#event",
+  "error": {
+    "code": -32000,
+    "msg": "Server error",
+    "data": "subscription was cancelled (reason: client is not pulling messages fast enough)" // or "subscription was cancelled (reason: Tendermint exited)"
+  }
+}
+
+Additionally, there are now limits on the number of subscribers and
+subscriptions that can be active at once. See the new
+`rpc.max_subscription_clients` and `rpc.max_subscriptions_per_client` values to
+configure this.
+```
+
+### Applications
+
+Simple rename of `ConsensusParams.BlockSize` to `ConsensusParams.Block`.
+
+The `ConsensusParams.Block.TimeIotaMS` field was also removed. It's configured
+in the ConsensusParsm in genesis.
+
+### Go API
+
+See the [CHANGELOG](CHANGELOG.md). These are relatively straight forward.
+
+## v0.30.0
+
+This release contains a breaking change to both the block and p2p protocols,
+however it may be compatible with blockchains created with v0.29.0 depending on
+the chain history. If your blockchain has not included any pieces of evidence,
+or no piece of evidence has been included in more than one block,
+and if your application has never returned multiple updates
+for the same validator in a single block, then v0.30.0 will work fine with
+blockchains created with v0.29.0.
+
+The p2p protocol change is to fix the proposer selection algorithm again.
+Note that proposer selection is purely a p2p concern right
+now since the algorithm is only relevant during real time consensus.
+This change is thus compatible with v0.29.0, but
+all nodes must be upgraded to avoid disagreements on the proposer.
+
+### Applications
+
+Applications must ensure they do not return duplicates in
+`ResponseEndBlock.ValidatorUpdates`. A pubkey must only appear once per set of
+updates. Duplicates will cause irrecoverable failure. If you have a very good
+reason why we shouldn't do this, please open an issue.
+
+## v0.29.0
+
+This release contains some breaking changes to the block and p2p protocols,
+and will not be compatible with any previous versions of the software, primarily
+due to changes in how various data structures are hashed.
+
+Any implementations of Tendermint blockchain verification, including lite clients,
+will need to be updated. For specific details:
+
+* [Merkle tree](https://github.com/tendermint/spec/blob/master/spec/blockchain/encoding.md#merkle-trees)
+* [ConsensusParams](https://github.com/tendermint/spec/blob/master/spec/blockchain/state.md#consensusparams)
+
+There was also a small change to field ordering in the vote struct. Any
+implementations of an out-of-process validator (like a Key-Management Server)
+will need to be updated. For specific details:
+
+* [Vote](https://github.com/tendermint/spec/blob/master/spec/consensus/signing.md#votes)
+
+Finally, the proposer selection algorithm continues to evolve. See the
+[work-in-progress
+specification](https://github.com/tendermint/tendermint/pull/3140).
+
+For everything else, please see the [CHANGELOG](./CHANGELOG.md#v0.29.0).
+
+## v0.28.0
+
+This release breaks the format for the `priv_validator.json` file
+and the protocol used for the external validator process.
+It is compatible with v0.27.0 blockchains (neither the BlockProtocol nor the
+P2PProtocol have changed).
+
+Please read carefully for details about upgrading.
+
+**Note:** Backup your `config/priv_validator.json`
+before proceeding.
+
+### `priv_validator.json`
+
+The `config/priv_validator.json` is now two files:
+`config/priv_validator_key.json` and `data/priv_validator_state.json`.
+The former contains the key material, the later contains the details on the last
+message signed.
+
+When running v0.28.0 for the first time, it will back up any pre-existing
+`priv_validator.json` file and proceed to split it into the two new files.
+Upgrading should happen automatically without problem.
+
+To upgrade manually, use the provided `privValUpgrade.go` script, with exact paths for the old
+`priv_validator.json` and the locations for the two new files. It's recomended
+to use the default paths, of `config/priv_validator_key.json` and
+`data/priv_validator_state.json`, respectively:
+
+```sh
+go run scripts/privValUpgrade.go <old-path> <new-key-path> <new-state-path>
+```
+
+### External validator signers
+
+The Unix and TCP implementations of the remote signing validator
+have been consolidated into a single implementation.
+Thus in both cases, the external process is expected to dial
+Tendermint. This is different from how Unix sockets used to work, where
+Tendermint dialed the external process.
+
+The `PubKeyMsg` was also split into separate `Request` and `Response` types
+for consistency with other messages.
+
+Note that the TCP sockets don't yet use a persistent key,
+so while they're encrypted, they can't yet be properly authenticated.
+See [#3105](https://github.com/tendermint/tendermint/issues/3105).
+Note the Unix socket has neither encryption nor authentication, but will
+add a shared-secret in [#3099](https://github.com/tendermint/tendermint/issues/3099).
 
 ## v0.27.0
 
@@ -52,8 +606,8 @@ old data to be compatible with the new version.
 
 To reset the state do:
 
-```
-$ tendermint unsafe_reset_all
+```sh
+tendermint unsafe_reset_all
 ```
 
 Here we summarize some other notable changes to be mindful of.
@@ -90,7 +644,7 @@ the root of another. If you don't need this functionality, and you used to
 return `<proof bytes>` here, you should instead return a single `ProofOp` with
 just the `Data` field set:
 
-```
+```go
 []ProofOp{
     ProofOp{
         Data: <proof bytes>,
@@ -100,10 +654,10 @@ just the `Data` field set:
 
 For more information, see:
 
-- [ADR-026](https://github.com/tendermint/tendermint/blob/30519e8361c19f4bf320ef4d26288ebc621ad725/docs/architecture/adr-026-general-merkle-proof.md)
-- [Relevant ABCI
+* [ADR-026](https://github.com/tendermint/tendermint/blob/30519e8361c19f4bf320ef4d26288ebc621ad725/docs/architecture/adr-026-general-merkle-proof.md)
+* [Relevant ABCI
   documentation](https://github.com/tendermint/tendermint/blob/30519e8361c19f4bf320ef4d26288ebc621ad725/docs/spec/abci/apps.md#query-proofs)
-- [Description of
+* [Description of
   keys](https://github.com/tendermint/tendermint/blob/30519e8361c19f4bf320ef4d26288ebc621ad725/crypto/merkle/proof_key_path.go#L14)
 
 ### Go API Changes
@@ -138,8 +692,8 @@ old data to be compatible with the new version.
 
 To reset the state do:
 
-```
-$ tendermint unsafe_reset_all
+```sh
+tendermint unsafe_reset_all
 ```
 
 Here we summarize some other notable changes to be mindful of.
@@ -149,7 +703,7 @@ Here we summarize some other notable changes to be mindful of.
 `p2p.max_num_peers` was removed in favor of `p2p.max_num_inbound_peers` and
 `p2p.max_num_outbound_peers`.
 
-```
+```toml
 # Maximum number of inbound peers
 max_num_inbound_peers = 40
 
@@ -185,7 +739,6 @@ required to maintain a map from validator addresses to pubkeys since v0.23 (when
 pubkeys were removed from RequestBeginBlock), but now they may need to track
 multiple validator sets at once to accomodate this delay.
 
-
 ### Block Size
 
 The `ConsensusParams.BlockSize.MaxTxs` was removed in favour of

Vagrantfile

@@ -2,7 +2,7 @@
 # vi: set ft=ruby :
 
 Vagrant.configure("2") do |config|
-  config.vm.box = "ubuntu/xenial64"
+  config.vm.box = "ubuntu/focal64"
 
   config.vm.provider "virtualbox" do |v|
     v.memory = 4096
@@ -19,20 +19,28 @@ Vagrant.configure("2") do |config|
 
     # install docker
     apt-get install -y --no-install-recommends apt-transport-https \
-      ca-certificates curl software-properties-common
+      ca-certificates \
+      curl \
+      gnupg-agent \
+      software-properties-common
     curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
     add-apt-repository \
       "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
       $(lsb_release -cs) \
       stable"
+    apt-get update
     apt-get install -y docker-ce
-    usermod -a -G docker vagrant
+    usermod -aG docker vagrant
 
     # install go
-    wget -q https://dl.google.com/go/go1.11.linux-amd64.tar.gz
-    tar -xvf go1.11.linux-amd64.tar.gz
+    wget -q https://dl.google.com/go/go1.15.linux-amd64.tar.gz
+    tar -xvf go1.15.linux-amd64.tar.gz
     mv go /usr/local
-    rm -f go1.11.linux-amd64.tar.gz
+    rm -f go1.15.linux-amd64.tar.gz
+
+    # install nodejs (for docs)
+    curl -sL https://deb.nodesource.com/setup_11.x | bash -
+    apt-get install -y nodejs
 
     # cleanup
     apt-get autoremove -y
@@ -53,6 +61,6 @@ Vagrant.configure("2") do |config|
 
     # get all deps and tools, ready to install/test
     su - vagrant  -c 'source /home/vagrant/.bash_profile'
-    su - vagrant -c 'cd /home/vagrant/go/src/github.com/tendermint/tendermint && make get_tools && make get_dev_tools && make get_vendor_deps'
+    su - vagrant -c 'cd /home/vagrant/go/src/github.com/tendermint/tendermint && make tools'
   SHELL
 end

abci/README.md

@@ -8,7 +8,7 @@ can manage an application state running in another.
 
 Previously, the ABCI was referred to as TMSP.
 
-The community has provided a number of addtional implementations, see the [Tendermint Ecosystem](https://tendermint.com/ecosystem)
+The community has provided a number of additional implementations, see the [Tendermint Ecosystem](https://github.com/tendermint/awesome#ecosystem)
 
 
 ## Installation & Usage
@@ -19,7 +19,7 @@ To get up and running quickly, see the [getting started guide](../docs/app-dev/g
 
 A detailed description of the ABCI methods and message types is contained in:
 
-- [The main spec](../docs/spec/abci/abci.md)
+- [The main spec](https://github.com/tendermint/spec/blob/master/spec/abci/abci.md)
 - [A protobuf file](./types/types.proto)
 - [A Go interface](./types/application.go)
 
@@ -27,11 +27,10 @@ A detailed description of the ABCI methods and message types is contained in:
 
 To compile the protobuf file, run (from the root of the repo):
 
-```
+```sh
 make protoc_abci
 ```
 
 See `protoc --help` and [the Protocol Buffers site](https://developers.google.com/protocol-buffers)
 for details on compiling for other languages. Note we also include a [GRPC](https://www.grpc.io/docs)
 service definition.
-

abci/client/client.go

@@ -5,7 +5,8 @@ import (
 	"sync"
 
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	"github.com/tendermint/tendermint/libs/service"
+	tmsync "github.com/tendermint/tendermint/libs/sync"
 )
 
 const (
@@ -19,7 +20,7 @@ const (
 // Note these are client errors, eg. ABCI socket connectivity issues.
 // Application-related errors are reflected in response via ABCI error codes and logs.
 type Client interface {
-	cmn.Service
+	service.Service
 
 	SetResponseCallback(Callback)
 	Error() error
@@ -28,25 +29,33 @@ type Client interface {
 	EchoAsync(msg string) *ReqRes
 	InfoAsync(types.RequestInfo) *ReqRes
 	SetOptionAsync(types.RequestSetOption) *ReqRes
-	DeliverTxAsync(tx []byte) *ReqRes
-	CheckTxAsync(tx []byte) *ReqRes
+	DeliverTxAsync(types.RequestDeliverTx) *ReqRes
+	CheckTxAsync(types.RequestCheckTx) *ReqRes
 	QueryAsync(types.RequestQuery) *ReqRes
 	CommitAsync() *ReqRes
 	InitChainAsync(types.RequestInitChain) *ReqRes
 	BeginBlockAsync(types.RequestBeginBlock) *ReqRes
 	EndBlockAsync(types.RequestEndBlock) *ReqRes
+	ListSnapshotsAsync(types.RequestListSnapshots) *ReqRes
+	OfferSnapshotAsync(types.RequestOfferSnapshot) *ReqRes
+	LoadSnapshotChunkAsync(types.RequestLoadSnapshotChunk) *ReqRes
+	ApplySnapshotChunkAsync(types.RequestApplySnapshotChunk) *ReqRes
 
 	FlushSync() error
 	EchoSync(msg string) (*types.ResponseEcho, error)
 	InfoSync(types.RequestInfo) (*types.ResponseInfo, error)
 	SetOptionSync(types.RequestSetOption) (*types.ResponseSetOption, error)
-	DeliverTxSync(tx []byte) (*types.ResponseDeliverTx, error)
-	CheckTxSync(tx []byte) (*types.ResponseCheckTx, error)
+	DeliverTxSync(types.RequestDeliverTx) (*types.ResponseDeliverTx, error)
+	CheckTxSync(types.RequestCheckTx) (*types.ResponseCheckTx, error)
 	QuerySync(types.RequestQuery) (*types.ResponseQuery, error)
 	CommitSync() (*types.ResponseCommit, error)
 	InitChainSync(types.RequestInitChain) (*types.ResponseInitChain, error)
 	BeginBlockSync(types.RequestBeginBlock) (*types.ResponseBeginBlock, error)
 	EndBlockSync(types.RequestEndBlock) (*types.ResponseEndBlock, error)
+	ListSnapshotsSync(types.RequestListSnapshots) (*types.ResponseListSnapshots, error)
+	OfferSnapshotSync(types.RequestOfferSnapshot) (*types.ResponseOfferSnapshot, error)
+	LoadSnapshotChunkSync(types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error)
+	ApplySnapshotChunkSync(types.RequestApplySnapshotChunk) (*types.ResponseApplySnapshotChunk, error)
 }
 
 //----------------------------------------
@@ -60,23 +69,19 @@ func NewClient(addr, transport string, mustConnect bool) (client Client, err err
 	case "grpc":
 		client = NewGRPCClient(addr, mustConnect)
 	default:
-		err = fmt.Errorf("Unknown abci transport %s", transport)
+		err = fmt.Errorf("unknown abci transport %s", transport)
 	}
 	return
 }
 
-//----------------------------------------
-
 type Callback func(*types.Request, *types.Response)
 
-//----------------------------------------
-
 type ReqRes struct {
 	*types.Request
 	*sync.WaitGroup
 	*types.Response // Not set atomically, so be sure to use WaitGroup.
 
-	mtx  sync.Mutex
+	mtx  tmsync.Mutex
 	done bool                  // Gets set to true once *after* WaitGroup.Done().
 	cb   func(*types.Response) // A single callback that may be set.
 }
@@ -92,34 +97,50 @@ func NewReqRes(req *types.Request) *ReqRes {
 	}
 }
 
-// Sets the callback for this ReqRes atomically.
-// If reqRes is already done, calls cb immediately.
-// NOTE: reqRes.cb should not change if reqRes.done.
-// NOTE: only one callback is supported.
-func (reqRes *ReqRes) SetCallback(cb func(res *types.Response)) {
-	reqRes.mtx.Lock()
+// Sets sets the callback. If reqRes is already done, it will call the cb
+// immediately. Note, reqRes.cb should not change if reqRes.done and only one
+// callback is supported.
+func (r *ReqRes) SetCallback(cb func(res *types.Response)) {
+	r.mtx.Lock()
 
-	if reqRes.done {
-		reqRes.mtx.Unlock()
-		cb(reqRes.Response)
+	if r.done {
+		r.mtx.Unlock()
+		cb(r.Response)
 		return
 	}
 
-	reqRes.cb = cb
-	reqRes.mtx.Unlock()
+	r.cb = cb
+	r.mtx.Unlock()
 }
 
-func (reqRes *ReqRes) GetCallback() func(*types.Response) {
-	reqRes.mtx.Lock()
-	defer reqRes.mtx.Unlock()
-	return reqRes.cb
+// InvokeCallback invokes a thread-safe execution of the configured callback
+// if non-nil.
+func (r *ReqRes) InvokeCallback() {
+	r.mtx.Lock()
+	defer r.mtx.Unlock()
+
+	if r.cb != nil {
+		r.cb(r.Response)
+	}
 }
 
-// NOTE: it should be safe to read reqRes.cb without locks after this.
-func (reqRes *ReqRes) SetDone() {
-	reqRes.mtx.Lock()
-	reqRes.done = true
-	reqRes.mtx.Unlock()
+// GetCallback returns the configured callback of the ReqRes object which may be
+// nil. Note, it is not safe to concurrently call this in cases where it is
+// marked done and SetCallback is called before calling GetCallback as that
+// will invoke the callback twice and create a potential race condition.
+//
+// ref: https://github.com/tendermint/tendermint/issues/5439
+func (r *ReqRes) GetCallback() func(*types.Response) {
+	r.mtx.Lock()
+	defer r.mtx.Unlock()
+	return r.cb
+}
+
+// SetDone marks the ReqRes object as done.
+func (r *ReqRes) SetDone() {
+	r.mtx.Lock()
+	r.done = true
+	r.mtx.Unlock()
 }
 
 func waitGroup1() (wg *sync.WaitGroup) {

abci/client/grpc_client.go

@@ -6,11 +6,13 @@ import (
 	"sync"
 	"time"
 
-	context "golang.org/x/net/context"
-	grpc "google.golang.org/grpc"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
 
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmnet "github.com/tendermint/tendermint/libs/net"
+	"github.com/tendermint/tendermint/libs/service"
+	tmsync "github.com/tendermint/tendermint/libs/sync"
 )
 
 var _ Client = (*grpcClient)(nil)
@@ -18,38 +20,78 @@ var _ Client = (*grpcClient)(nil)
 // A stripped copy of the remoteClient that makes
 // synchronous calls using grpc
 type grpcClient struct {
-	cmn.BaseService
+	service.BaseService
 	mustConnect bool
 
-	client types.ABCIApplicationClient
-	conn   *grpc.ClientConn
+	client   types.ABCIApplicationClient
+	conn     *grpc.ClientConn
+	chReqRes chan *ReqRes // dispatches "async" responses to callbacks *in order*, needed by mempool
 
-	mtx   sync.Mutex
+	mtx   tmsync.Mutex
 	addr  string
 	err   error
 	resCb func(*types.Request, *types.Response) // listens to all callbacks
 }
 
-func NewGRPCClient(addr string, mustConnect bool) *grpcClient {
+func NewGRPCClient(addr string, mustConnect bool) Client {
 	cli := &grpcClient{
 		addr:        addr,
 		mustConnect: mustConnect,
+		// Buffering the channel is needed to make calls appear asynchronous,
+		// which is required when the caller makes multiple async calls before
+		// processing callbacks (e.g. due to holding locks). 64 means that a
+		// caller can make up to 64 async calls before a callback must be
+		// processed (otherwise it deadlocks). It also means that we can make 64
+		// gRPC calls while processing a slow callback at the channel head.
+		chReqRes: make(chan *ReqRes, 64),
 	}
-	cli.BaseService = *cmn.NewBaseService(nil, "grpcClient", cli)
+	cli.BaseService = *service.NewBaseService(nil, "grpcClient", cli)
 	return cli
 }
 
-func dialerFunc(addr string, timeout time.Duration) (net.Conn, error) {
-	return cmn.Connect(addr)
+func dialerFunc(ctx context.Context, addr string) (net.Conn, error) {
+	return tmnet.Connect(addr)
 }
 
 func (cli *grpcClient) OnStart() error {
 	if err := cli.BaseService.OnStart(); err != nil {
 		return err
 	}
+
+	// This processes asynchronous request/response messages and dispatches
+	// them to callbacks.
+	go func() {
+		// Use a separate function to use defer for mutex unlocks (this handles panics)
+		callCb := func(reqres *ReqRes) {
+			cli.mtx.Lock()
+			defer cli.mtx.Unlock()
+
+			reqres.SetDone()
+			reqres.Done()
+
+			// Notify client listener if set
+			if cli.resCb != nil {
+				cli.resCb(reqres.Request, reqres.Response)
+			}
+
+			// Notify reqRes listener if set
+			if cb := reqres.GetCallback(); cb != nil {
+				cb(reqres.Response)
+			}
+		}
+		for reqres := range cli.chReqRes {
+			if reqres != nil {
+				callCb(reqres)
+			} else {
+				cli.Logger.Error("Received nil reqres")
+			}
+		}
+	}()
+
 RETRY_LOOP:
 	for {
-		conn, err := grpc.Dial(cli.addr, grpc.WithInsecure(), grpc.WithDialer(dialerFunc))
+		//nolint:staticcheck // SA1019 Existing use of deprecated but supported dial option.
+		conn, err := grpc.Dial(cli.addr, grpc.WithInsecure(), grpc.WithContextDialer(dialerFunc))
 		if err != nil {
 			if cli.mustConnect {
 				return err
@@ -65,7 +107,7 @@ RETRY_LOOP:
 
 	ENSURE_CONNECTED:
 		for {
-			_, err := client.Echo(context.Background(), &types.RequestEcho{Message: "hello"}, grpc.FailFast(true))
+			_, err := client.Echo(context.Background(), &types.RequestEcho{Message: "hello"}, grpc.WaitForReady(true))
 			if err == nil {
 				break ENSURE_CONNECTED
 			}
@@ -84,21 +126,24 @@ func (cli *grpcClient) OnStop() {
 	if cli.conn != nil {
 		cli.conn.Close()
 	}
+	close(cli.chReqRes)
 }
 
 func (cli *grpcClient) StopForError(err error) {
-	cli.mtx.Lock()
 	if !cli.IsRunning() {
 		return
 	}
 
+	cli.mtx.Lock()
 	if cli.err == nil {
 		cli.err = err
 	}
 	cli.mtx.Unlock()
 
 	cli.Logger.Error(fmt.Sprintf("Stopping abci.grpcClient for error: %v", err.Error()))
-	cli.Stop()
+	if err := cli.Stop(); err != nil {
+		cli.Logger.Error("Error stopping abci.grpcClient", "err", err)
+	}
 }
 
 func (cli *grpcClient) Error() error {
@@ -125,124 +170,176 @@ func (cli *grpcClient) SetResponseCallback(resCb Callback) {
 
 func (cli *grpcClient) EchoAsync(msg string) *ReqRes {
 	req := types.ToRequestEcho(msg)
-	res, err := cli.client.Echo(context.Background(), req.GetEcho(), grpc.FailFast(true))
+	res, err := cli.client.Echo(context.Background(), req.GetEcho(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Echo{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Echo{Echo: res}})
 }
 
 func (cli *grpcClient) FlushAsync() *ReqRes {
 	req := types.ToRequestFlush()
-	res, err := cli.client.Flush(context.Background(), req.GetFlush(), grpc.FailFast(true))
+	res, err := cli.client.Flush(context.Background(), req.GetFlush(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Flush{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Flush{Flush: res}})
 }
 
 func (cli *grpcClient) InfoAsync(params types.RequestInfo) *ReqRes {
 	req := types.ToRequestInfo(params)
-	res, err := cli.client.Info(context.Background(), req.GetInfo(), grpc.FailFast(true))
+	res, err := cli.client.Info(context.Background(), req.GetInfo(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Info{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Info{Info: res}})
 }
 
 func (cli *grpcClient) SetOptionAsync(params types.RequestSetOption) *ReqRes {
 	req := types.ToRequestSetOption(params)
-	res, err := cli.client.SetOption(context.Background(), req.GetSetOption(), grpc.FailFast(true))
+	res, err := cli.client.SetOption(context.Background(), req.GetSetOption(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_SetOption{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_SetOption{SetOption: res}})
 }
 
-func (cli *grpcClient) DeliverTxAsync(tx []byte) *ReqRes {
-	req := types.ToRequestDeliverTx(tx)
-	res, err := cli.client.DeliverTx(context.Background(), req.GetDeliverTx(), grpc.FailFast(true))
+func (cli *grpcClient) DeliverTxAsync(params types.RequestDeliverTx) *ReqRes {
+	req := types.ToRequestDeliverTx(params)
+	res, err := cli.client.DeliverTx(context.Background(), req.GetDeliverTx(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_DeliverTx{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_DeliverTx{DeliverTx: res}})
 }
 
-func (cli *grpcClient) CheckTxAsync(tx []byte) *ReqRes {
-	req := types.ToRequestCheckTx(tx)
-	res, err := cli.client.CheckTx(context.Background(), req.GetCheckTx(), grpc.FailFast(true))
+func (cli *grpcClient) CheckTxAsync(params types.RequestCheckTx) *ReqRes {
+	req := types.ToRequestCheckTx(params)
+	res, err := cli.client.CheckTx(context.Background(), req.GetCheckTx(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_CheckTx{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_CheckTx{CheckTx: res}})
 }
 
 func (cli *grpcClient) QueryAsync(params types.RequestQuery) *ReqRes {
 	req := types.ToRequestQuery(params)
-	res, err := cli.client.Query(context.Background(), req.GetQuery(), grpc.FailFast(true))
+	res, err := cli.client.Query(context.Background(), req.GetQuery(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Query{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Query{Query: res}})
 }
 
 func (cli *grpcClient) CommitAsync() *ReqRes {
 	req := types.ToRequestCommit()
-	res, err := cli.client.Commit(context.Background(), req.GetCommit(), grpc.FailFast(true))
+	res, err := cli.client.Commit(context.Background(), req.GetCommit(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Commit{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_Commit{Commit: res}})
 }
 
 func (cli *grpcClient) InitChainAsync(params types.RequestInitChain) *ReqRes {
 	req := types.ToRequestInitChain(params)
-	res, err := cli.client.InitChain(context.Background(), req.GetInitChain(), grpc.FailFast(true))
+	res, err := cli.client.InitChain(context.Background(), req.GetInitChain(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_InitChain{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_InitChain{InitChain: res}})
 }
 
 func (cli *grpcClient) BeginBlockAsync(params types.RequestBeginBlock) *ReqRes {
 	req := types.ToRequestBeginBlock(params)
-	res, err := cli.client.BeginBlock(context.Background(), req.GetBeginBlock(), grpc.FailFast(true))
+	res, err := cli.client.BeginBlock(context.Background(), req.GetBeginBlock(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_BeginBlock{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_BeginBlock{BeginBlock: res}})
 }
 
 func (cli *grpcClient) EndBlockAsync(params types.RequestEndBlock) *ReqRes {
 	req := types.ToRequestEndBlock(params)
-	res, err := cli.client.EndBlock(context.Background(), req.GetEndBlock(), grpc.FailFast(true))
+	res, err := cli.client.EndBlock(context.Background(), req.GetEndBlock(), grpc.WaitForReady(true))
 	if err != nil {
 		cli.StopForError(err)
 	}
-	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_EndBlock{res}})
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_EndBlock{EndBlock: res}})
 }
 
+func (cli *grpcClient) ListSnapshotsAsync(params types.RequestListSnapshots) *ReqRes {
+	req := types.ToRequestListSnapshots(params)
+	res, err := cli.client.ListSnapshots(context.Background(), req.GetListSnapshots(), grpc.WaitForReady(true))
+	if err != nil {
+		cli.StopForError(err)
+	}
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_ListSnapshots{ListSnapshots: res}})
+}
+
+func (cli *grpcClient) OfferSnapshotAsync(params types.RequestOfferSnapshot) *ReqRes {
+	req := types.ToRequestOfferSnapshot(params)
+	res, err := cli.client.OfferSnapshot(context.Background(), req.GetOfferSnapshot(), grpc.WaitForReady(true))
+	if err != nil {
+		cli.StopForError(err)
+	}
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_OfferSnapshot{OfferSnapshot: res}})
+}
+
+func (cli *grpcClient) LoadSnapshotChunkAsync(params types.RequestLoadSnapshotChunk) *ReqRes {
+	req := types.ToRequestLoadSnapshotChunk(params)
+	res, err := cli.client.LoadSnapshotChunk(context.Background(), req.GetLoadSnapshotChunk(), grpc.WaitForReady(true))
+	if err != nil {
+		cli.StopForError(err)
+	}
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_LoadSnapshotChunk{LoadSnapshotChunk: res}})
+}
+
+func (cli *grpcClient) ApplySnapshotChunkAsync(params types.RequestApplySnapshotChunk) *ReqRes {
+	req := types.ToRequestApplySnapshotChunk(params)
+	res, err := cli.client.ApplySnapshotChunk(context.Background(), req.GetApplySnapshotChunk(), grpc.WaitForReady(true))
+	if err != nil {
+		cli.StopForError(err)
+	}
+	return cli.finishAsyncCall(req, &types.Response{Value: &types.Response_ApplySnapshotChunk{ApplySnapshotChunk: res}})
+}
+
+// finishAsyncCall creates a ReqRes for an async call, and immediately populates it
+// with the response. We don't complete it until it's been ordered via the channel.
 func (cli *grpcClient) finishAsyncCall(req *types.Request, res *types.Response) *ReqRes {
 	reqres := NewReqRes(req)
-	reqres.Response = res // Set response
-	reqres.Done()         // Release waiters
-	reqres.SetDone()      // so reqRes.SetCallback will run the callback
-
-	// go routine for callbacks
-	go func() {
-		// Notify reqRes listener if set
-		if cb := reqres.GetCallback(); cb != nil {
-			cb(res)
-		}
-
-		// Notify client listener if set
-		if cli.resCb != nil {
-			cli.resCb(reqres.Request, res)
-		}
-	}()
+	reqres.Response = res
+	cli.chReqRes <- reqres // use channel for async responses, since they must be ordered
 	return reqres
 }
 
+// finishSyncCall waits for an async call to complete. It is necessary to call all
+// sync calls asynchronously as well, to maintain call and response ordering via
+// the channel, and this method will wait until the async call completes.
+func (cli *grpcClient) finishSyncCall(reqres *ReqRes) *types.Response {
+	// It's possible that the callback is called twice, since the callback can
+	// be called immediately on SetCallback() in addition to after it has been
+	// set. This is because completing the ReqRes happens in a separate critical
+	// section from the one where the callback is called: there is a race where
+	// SetCallback() is called between completing the ReqRes and dispatching the
+	// callback.
+	//
+	// We also buffer the channel with 1 response, since SetCallback() will be
+	// called synchronously if the reqres is already completed, in which case
+	// it will block on sending to the channel since it hasn't gotten around to
+	// receiving from it yet.
+	//
+	// ReqRes should really handle callback dispatch internally, to guarantee
+	// that it's only called once and avoid the above race conditions.
+	var once sync.Once
+	ch := make(chan *types.Response, 1)
+	reqres.SetCallback(func(res *types.Response) {
+		once.Do(func() {
+			ch <- res
+		})
+	})
+	return <-ch
+}
+
 //----------------------------------------
 
 func (cli *grpcClient) FlushSync() error {
@@ -252,12 +349,12 @@ func (cli *grpcClient) FlushSync() error {
 func (cli *grpcClient) EchoSync(msg string) (*types.ResponseEcho, error) {
 	reqres := cli.EchoAsync(msg)
 	// StopForError should already have been called if error is set
-	return reqres.Response.GetEcho(), cli.Error()
+	return cli.finishSyncCall(reqres).GetEcho(), cli.Error()
 }
 
 func (cli *grpcClient) InfoSync(req types.RequestInfo) (*types.ResponseInfo, error) {
 	reqres := cli.InfoAsync(req)
-	return reqres.Response.GetInfo(), cli.Error()
+	return cli.finishSyncCall(reqres).GetInfo(), cli.Error()
 }
 
 func (cli *grpcClient) SetOptionSync(req types.RequestSetOption) (*types.ResponseSetOption, error) {
@@ -265,37 +362,59 @@ func (cli *grpcClient) SetOptionSync(req types.RequestSetOption) (*types.Respons
 	return reqres.Response.GetSetOption(), cli.Error()
 }
 
-func (cli *grpcClient) DeliverTxSync(tx []byte) (*types.ResponseDeliverTx, error) {
-	reqres := cli.DeliverTxAsync(tx)
-	return reqres.Response.GetDeliverTx(), cli.Error()
+func (cli *grpcClient) DeliverTxSync(params types.RequestDeliverTx) (*types.ResponseDeliverTx, error) {
+	reqres := cli.DeliverTxAsync(params)
+	return cli.finishSyncCall(reqres).GetDeliverTx(), cli.Error()
 }
 
-func (cli *grpcClient) CheckTxSync(tx []byte) (*types.ResponseCheckTx, error) {
-	reqres := cli.CheckTxAsync(tx)
-	return reqres.Response.GetCheckTx(), cli.Error()
+func (cli *grpcClient) CheckTxSync(params types.RequestCheckTx) (*types.ResponseCheckTx, error) {
+	reqres := cli.CheckTxAsync(params)
+	return cli.finishSyncCall(reqres).GetCheckTx(), cli.Error()
 }
 
 func (cli *grpcClient) QuerySync(req types.RequestQuery) (*types.ResponseQuery, error) {
 	reqres := cli.QueryAsync(req)
-	return reqres.Response.GetQuery(), cli.Error()
+	return cli.finishSyncCall(reqres).GetQuery(), cli.Error()
 }
 
 func (cli *grpcClient) CommitSync() (*types.ResponseCommit, error) {
 	reqres := cli.CommitAsync()
-	return reqres.Response.GetCommit(), cli.Error()
+	return cli.finishSyncCall(reqres).GetCommit(), cli.Error()
 }
 
 func (cli *grpcClient) InitChainSync(params types.RequestInitChain) (*types.ResponseInitChain, error) {
 	reqres := cli.InitChainAsync(params)
-	return reqres.Response.GetInitChain(), cli.Error()
+	return cli.finishSyncCall(reqres).GetInitChain(), cli.Error()
 }
 
 func (cli *grpcClient) BeginBlockSync(params types.RequestBeginBlock) (*types.ResponseBeginBlock, error) {
 	reqres := cli.BeginBlockAsync(params)
-	return reqres.Response.GetBeginBlock(), cli.Error()
+	return cli.finishSyncCall(reqres).GetBeginBlock(), cli.Error()
 }
 
 func (cli *grpcClient) EndBlockSync(params types.RequestEndBlock) (*types.ResponseEndBlock, error) {
 	reqres := cli.EndBlockAsync(params)
-	return reqres.Response.GetEndBlock(), cli.Error()
+	return cli.finishSyncCall(reqres).GetEndBlock(), cli.Error()
+}
+
+func (cli *grpcClient) ListSnapshotsSync(params types.RequestListSnapshots) (*types.ResponseListSnapshots, error) {
+	reqres := cli.ListSnapshotsAsync(params)
+	return cli.finishSyncCall(reqres).GetListSnapshots(), cli.Error()
+}
+
+func (cli *grpcClient) OfferSnapshotSync(params types.RequestOfferSnapshot) (*types.ResponseOfferSnapshot, error) {
+	reqres := cli.OfferSnapshotAsync(params)
+	return cli.finishSyncCall(reqres).GetOfferSnapshot(), cli.Error()
+}
+
+func (cli *grpcClient) LoadSnapshotChunkSync(
+	params types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error) {
+	reqres := cli.LoadSnapshotChunkAsync(params)
+	return cli.finishSyncCall(reqres).GetLoadSnapshotChunk(), cli.Error()
+}
+
+func (cli *grpcClient) ApplySnapshotChunkSync(
+	params types.RequestApplySnapshotChunk) (*types.ResponseApplySnapshotChunk, error) {
+	reqres := cli.ApplySnapshotChunkAsync(params)
+	return cli.finishSyncCall(reqres).GetApplySnapshotChunk(), cli.Error()
 }

abci/client/local_client.go

@@ -1,10 +1,9 @@
 package abcicli
 
 import (
-	"sync"
-
 	types "github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	"github.com/tendermint/tendermint/libs/service"
+	tmsync "github.com/tendermint/tendermint/libs/sync"
 )
 
 var _ Client = (*localClient)(nil)
@@ -14,22 +13,28 @@ var _ Client = (*localClient)(nil)
 // methods like CheckTx (/broadcast_tx_* RPC endpoint) or Query (/abci_query
 // RPC endpoint), but defers are used everywhere for the sake of consistency.
 type localClient struct {
-	cmn.BaseService
+	service.BaseService
 
-	mtx *sync.Mutex
+	mtx *tmsync.Mutex
 	types.Application
 	Callback
 }
 
-func NewLocalClient(mtx *sync.Mutex, app types.Application) *localClient {
+var _ Client = (*localClient)(nil)
+
+// NewLocalClient creates a local client, which will be directly calling the
+// methods of the given app.
+//
+// Both Async and Sync methods ignore the given context.Context parameter.
+func NewLocalClient(mtx *tmsync.Mutex, app types.Application) Client {
 	if mtx == nil {
-		mtx = new(sync.Mutex)
+		mtx = new(tmsync.Mutex)
 	}
 	cli := &localClient{
 		mtx:         mtx,
 		Application: app,
 	}
-	cli.BaseService = *cmn.NewBaseService(nil, "localClient", cli)
+	cli.BaseService = *service.NewBaseService(nil, "localClient", cli)
 	return cli
 }
 
@@ -81,24 +86,24 @@ func (app *localClient) SetOptionAsync(req types.RequestSetOption) *ReqRes {
 	)
 }
 
-func (app *localClient) DeliverTxAsync(tx []byte) *ReqRes {
+func (app *localClient) DeliverTxAsync(params types.RequestDeliverTx) *ReqRes {
 	app.mtx.Lock()
 	defer app.mtx.Unlock()
 
-	res := app.Application.DeliverTx(tx)
+	res := app.Application.DeliverTx(params)
 	return app.callback(
-		types.ToRequestDeliverTx(tx),
+		types.ToRequestDeliverTx(params),
 		types.ToResponseDeliverTx(res),
 	)
 }
 
-func (app *localClient) CheckTxAsync(tx []byte) *ReqRes {
+func (app *localClient) CheckTxAsync(req types.RequestCheckTx) *ReqRes {
 	app.mtx.Lock()
 	defer app.mtx.Unlock()
 
-	res := app.Application.CheckTx(tx)
+	res := app.Application.CheckTx(req)
 	return app.callback(
-		types.ToRequestCheckTx(tx),
+		types.ToRequestCheckTx(req),
 		types.ToResponseCheckTx(res),
 	)
 }
@@ -158,6 +163,50 @@ func (app *localClient) EndBlockAsync(req types.RequestEndBlock) *ReqRes {
 	)
 }
 
+func (app *localClient) ListSnapshotsAsync(req types.RequestListSnapshots) *ReqRes {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.ListSnapshots(req)
+	return app.callback(
+		types.ToRequestListSnapshots(req),
+		types.ToResponseListSnapshots(res),
+	)
+}
+
+func (app *localClient) OfferSnapshotAsync(req types.RequestOfferSnapshot) *ReqRes {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.OfferSnapshot(req)
+	return app.callback(
+		types.ToRequestOfferSnapshot(req),
+		types.ToResponseOfferSnapshot(res),
+	)
+}
+
+func (app *localClient) LoadSnapshotChunkAsync(req types.RequestLoadSnapshotChunk) *ReqRes {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.LoadSnapshotChunk(req)
+	return app.callback(
+		types.ToRequestLoadSnapshotChunk(req),
+		types.ToResponseLoadSnapshotChunk(res),
+	)
+}
+
+func (app *localClient) ApplySnapshotChunkAsync(req types.RequestApplySnapshotChunk) *ReqRes {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.ApplySnapshotChunk(req)
+	return app.callback(
+		types.ToRequestApplySnapshotChunk(req),
+		types.ToResponseApplySnapshotChunk(res),
+	)
+}
+
 //-------------------------------------------------------
 
 func (app *localClient) FlushSync() error {
@@ -184,19 +233,19 @@ func (app *localClient) SetOptionSync(req types.RequestSetOption) (*types.Respon
 	return &res, nil
 }
 
-func (app *localClient) DeliverTxSync(tx []byte) (*types.ResponseDeliverTx, error) {
+func (app *localClient) DeliverTxSync(req types.RequestDeliverTx) (*types.ResponseDeliverTx, error) {
 	app.mtx.Lock()
 	defer app.mtx.Unlock()
 
-	res := app.Application.DeliverTx(tx)
+	res := app.Application.DeliverTx(req)
 	return &res, nil
 }
 
-func (app *localClient) CheckTxSync(tx []byte) (*types.ResponseCheckTx, error) {
+func (app *localClient) CheckTxSync(req types.RequestCheckTx) (*types.ResponseCheckTx, error) {
 	app.mtx.Lock()
 	defer app.mtx.Unlock()
 
-	res := app.Application.CheckTx(tx)
+	res := app.Application.CheckTx(req)
 	return &res, nil
 }
 
@@ -240,6 +289,40 @@ func (app *localClient) EndBlockSync(req types.RequestEndBlock) (*types.Response
 	return &res, nil
 }
 
+func (app *localClient) ListSnapshotsSync(req types.RequestListSnapshots) (*types.ResponseListSnapshots, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.ListSnapshots(req)
+	return &res, nil
+}
+
+func (app *localClient) OfferSnapshotSync(req types.RequestOfferSnapshot) (*types.ResponseOfferSnapshot, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.OfferSnapshot(req)
+	return &res, nil
+}
+
+func (app *localClient) LoadSnapshotChunkSync(
+	req types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.LoadSnapshotChunk(req)
+	return &res, nil
+}
+
+func (app *localClient) ApplySnapshotChunkSync(
+	req types.RequestApplySnapshotChunk) (*types.ResponseApplySnapshotChunk, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.ApplySnapshotChunk(req)
+	return &res, nil
+}
+
 //-------------------------------------------------------
 
 func (app *localClient) callback(req *types.Request, res *types.Response) *ReqRes {

abci/client/mocks/client.go

@@ -0,0 +1,736 @@
+// Code generated by mockery v1.1.1. DO NOT EDIT.
+
+package mocks
+
+import (
+	abcicli "github.com/tendermint/tendermint/abci/client"
+	log "github.com/tendermint/tendermint/libs/log"
+
+	mock "github.com/stretchr/testify/mock"
+
+	types "github.com/tendermint/tendermint/abci/types"
+)
+
+// Client is an autogenerated mock type for the Client type
+type Client struct {
+	mock.Mock
+}
+
+// ApplySnapshotChunkAsync provides a mock function with given fields: _a0
+func (_m *Client) ApplySnapshotChunkAsync(_a0 types.RequestApplySnapshotChunk) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestApplySnapshotChunk) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// ApplySnapshotChunkSync provides a mock function with given fields: _a0
+func (_m *Client) ApplySnapshotChunkSync(_a0 types.RequestApplySnapshotChunk) (*types.ResponseApplySnapshotChunk, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseApplySnapshotChunk
+	if rf, ok := ret.Get(0).(func(types.RequestApplySnapshotChunk) *types.ResponseApplySnapshotChunk); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseApplySnapshotChunk)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestApplySnapshotChunk) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// BeginBlockAsync provides a mock function with given fields: _a0
+func (_m *Client) BeginBlockAsync(_a0 types.RequestBeginBlock) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestBeginBlock) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// BeginBlockSync provides a mock function with given fields: _a0
+func (_m *Client) BeginBlockSync(_a0 types.RequestBeginBlock) (*types.ResponseBeginBlock, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseBeginBlock
+	if rf, ok := ret.Get(0).(func(types.RequestBeginBlock) *types.ResponseBeginBlock); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseBeginBlock)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestBeginBlock) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// CheckTxAsync provides a mock function with given fields: _a0
+func (_m *Client) CheckTxAsync(_a0 types.RequestCheckTx) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestCheckTx) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// CheckTxSync provides a mock function with given fields: _a0
+func (_m *Client) CheckTxSync(_a0 types.RequestCheckTx) (*types.ResponseCheckTx, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseCheckTx
+	if rf, ok := ret.Get(0).(func(types.RequestCheckTx) *types.ResponseCheckTx); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseCheckTx)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestCheckTx) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// CommitAsync provides a mock function with given fields:
+func (_m *Client) CommitAsync() *abcicli.ReqRes {
+	ret := _m.Called()
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func() *abcicli.ReqRes); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// CommitSync provides a mock function with given fields:
+func (_m *Client) CommitSync() (*types.ResponseCommit, error) {
+	ret := _m.Called()
+
+	var r0 *types.ResponseCommit
+	if rf, ok := ret.Get(0).(func() *types.ResponseCommit); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseCommit)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// DeliverTxAsync provides a mock function with given fields: _a0
+func (_m *Client) DeliverTxAsync(_a0 types.RequestDeliverTx) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestDeliverTx) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// DeliverTxSync provides a mock function with given fields: _a0
+func (_m *Client) DeliverTxSync(_a0 types.RequestDeliverTx) (*types.ResponseDeliverTx, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseDeliverTx
+	if rf, ok := ret.Get(0).(func(types.RequestDeliverTx) *types.ResponseDeliverTx); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseDeliverTx)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestDeliverTx) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// EchoAsync provides a mock function with given fields: msg
+func (_m *Client) EchoAsync(msg string) *abcicli.ReqRes {
+	ret := _m.Called(msg)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(string) *abcicli.ReqRes); ok {
+		r0 = rf(msg)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// EchoSync provides a mock function with given fields: msg
+func (_m *Client) EchoSync(msg string) (*types.ResponseEcho, error) {
+	ret := _m.Called(msg)
+
+	var r0 *types.ResponseEcho
+	if rf, ok := ret.Get(0).(func(string) *types.ResponseEcho); ok {
+		r0 = rf(msg)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseEcho)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string) error); ok {
+		r1 = rf(msg)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// EndBlockAsync provides a mock function with given fields: _a0
+func (_m *Client) EndBlockAsync(_a0 types.RequestEndBlock) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestEndBlock) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// EndBlockSync provides a mock function with given fields: _a0
+func (_m *Client) EndBlockSync(_a0 types.RequestEndBlock) (*types.ResponseEndBlock, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseEndBlock
+	if rf, ok := ret.Get(0).(func(types.RequestEndBlock) *types.ResponseEndBlock); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseEndBlock)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestEndBlock) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// Error provides a mock function with given fields:
+func (_m *Client) Error() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// FlushAsync provides a mock function with given fields:
+func (_m *Client) FlushAsync() *abcicli.ReqRes {
+	ret := _m.Called()
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func() *abcicli.ReqRes); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// FlushSync provides a mock function with given fields:
+func (_m *Client) FlushSync() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// InfoAsync provides a mock function with given fields: _a0
+func (_m *Client) InfoAsync(_a0 types.RequestInfo) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestInfo) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// InfoSync provides a mock function with given fields: _a0
+func (_m *Client) InfoSync(_a0 types.RequestInfo) (*types.ResponseInfo, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseInfo
+	if rf, ok := ret.Get(0).(func(types.RequestInfo) *types.ResponseInfo); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseInfo)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestInfo) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// InitChainAsync provides a mock function with given fields: _a0
+func (_m *Client) InitChainAsync(_a0 types.RequestInitChain) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestInitChain) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// InitChainSync provides a mock function with given fields: _a0
+func (_m *Client) InitChainSync(_a0 types.RequestInitChain) (*types.ResponseInitChain, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseInitChain
+	if rf, ok := ret.Get(0).(func(types.RequestInitChain) *types.ResponseInitChain); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseInitChain)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestInitChain) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// IsRunning provides a mock function with given fields:
+func (_m *Client) IsRunning() bool {
+	ret := _m.Called()
+
+	var r0 bool
+	if rf, ok := ret.Get(0).(func() bool); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(bool)
+	}
+
+	return r0
+}
+
+// ListSnapshotsAsync provides a mock function with given fields: _a0
+func (_m *Client) ListSnapshotsAsync(_a0 types.RequestListSnapshots) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestListSnapshots) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// ListSnapshotsSync provides a mock function with given fields: _a0
+func (_m *Client) ListSnapshotsSync(_a0 types.RequestListSnapshots) (*types.ResponseListSnapshots, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseListSnapshots
+	if rf, ok := ret.Get(0).(func(types.RequestListSnapshots) *types.ResponseListSnapshots); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseListSnapshots)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestListSnapshots) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// LoadSnapshotChunkAsync provides a mock function with given fields: _a0
+func (_m *Client) LoadSnapshotChunkAsync(_a0 types.RequestLoadSnapshotChunk) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestLoadSnapshotChunk) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// LoadSnapshotChunkSync provides a mock function with given fields: _a0
+func (_m *Client) LoadSnapshotChunkSync(_a0 types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseLoadSnapshotChunk
+	if rf, ok := ret.Get(0).(func(types.RequestLoadSnapshotChunk) *types.ResponseLoadSnapshotChunk); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseLoadSnapshotChunk)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestLoadSnapshotChunk) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// OfferSnapshotAsync provides a mock function with given fields: _a0
+func (_m *Client) OfferSnapshotAsync(_a0 types.RequestOfferSnapshot) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestOfferSnapshot) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// OfferSnapshotSync provides a mock function with given fields: _a0
+func (_m *Client) OfferSnapshotSync(_a0 types.RequestOfferSnapshot) (*types.ResponseOfferSnapshot, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseOfferSnapshot
+	if rf, ok := ret.Get(0).(func(types.RequestOfferSnapshot) *types.ResponseOfferSnapshot); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseOfferSnapshot)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestOfferSnapshot) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// OnReset provides a mock function with given fields:
+func (_m *Client) OnReset() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// OnStart provides a mock function with given fields:
+func (_m *Client) OnStart() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// OnStop provides a mock function with given fields:
+func (_m *Client) OnStop() {
+	_m.Called()
+}
+
+// QueryAsync provides a mock function with given fields: _a0
+func (_m *Client) QueryAsync(_a0 types.RequestQuery) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestQuery) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// QuerySync provides a mock function with given fields: _a0
+func (_m *Client) QuerySync(_a0 types.RequestQuery) (*types.ResponseQuery, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseQuery
+	if rf, ok := ret.Get(0).(func(types.RequestQuery) *types.ResponseQuery); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseQuery)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestQuery) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// Quit provides a mock function with given fields:
+func (_m *Client) Quit() <-chan struct{} {
+	ret := _m.Called()
+
+	var r0 <-chan struct{}
+	if rf, ok := ret.Get(0).(func() <-chan struct{}); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(<-chan struct{})
+		}
+	}
+
+	return r0
+}
+
+// Reset provides a mock function with given fields:
+func (_m *Client) Reset() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// SetLogger provides a mock function with given fields: _a0
+func (_m *Client) SetLogger(_a0 log.Logger) {
+	_m.Called(_a0)
+}
+
+// SetOptionAsync provides a mock function with given fields: _a0
+func (_m *Client) SetOptionAsync(_a0 types.RequestSetOption) *abcicli.ReqRes {
+	ret := _m.Called(_a0)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(types.RequestSetOption) *abcicli.ReqRes); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	return r0
+}
+
+// SetOptionSync provides a mock function with given fields: _a0
+func (_m *Client) SetOptionSync(_a0 types.RequestSetOption) (*types.ResponseSetOption, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.ResponseSetOption
+	if rf, ok := ret.Get(0).(func(types.RequestSetOption) *types.ResponseSetOption); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseSetOption)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(types.RequestSetOption) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// SetResponseCallback provides a mock function with given fields: _a0
+func (_m *Client) SetResponseCallback(_a0 abcicli.Callback) {
+	_m.Called(_a0)
+}
+
+// Start provides a mock function with given fields:
+func (_m *Client) Start() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// Stop provides a mock function with given fields:
+func (_m *Client) Stop() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// String provides a mock function with given fields:
+func (_m *Client) String() string {
+	ret := _m.Called()
+
+	var r0 string
+	if rf, ok := ret.Get(0).(func() string); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(string)
+	}
+
+	return r0
+}

abci/client/socket_client.go

@@ -5,71 +5,78 @@ import (
 	"container/list"
 	"errors"
 	"fmt"
+	"io"
 	"net"
 	"reflect"
-	"sync"
 	"time"
 
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmnet "github.com/tendermint/tendermint/libs/net"
+	"github.com/tendermint/tendermint/libs/service"
+	tmsync "github.com/tendermint/tendermint/libs/sync"
+	"github.com/tendermint/tendermint/libs/timer"
 )
 
-const reqQueueSize = 256 // TODO make configurable
-// const maxResponseSize = 1048576 // 1MB TODO make configurable
-const flushThrottleMS = 20 // Don't wait longer than...
+const (
+	reqQueueSize    = 256 // TODO make configurable
+	flushThrottleMS = 20  // Don't wait longer than...
+)
+
+// This is goroutine-safe, but users should beware that the application in
+// general is not meant to be interfaced with concurrent callers.
+type socketClient struct {
+	service.BaseService
+
+	addr        string
+	mustConnect bool
+	conn        net.Conn
+
+	reqQueue   chan *ReqRes
+	flushTimer *timer.ThrottleTimer
+
+	mtx     tmsync.Mutex
+	err     error
+	reqSent *list.List                            // list of requests sent, waiting for response
+	resCb   func(*types.Request, *types.Response) // called on all requests, if set.
+}
 
 var _ Client = (*socketClient)(nil)
 
-// This is goroutine-safe, but users should beware that
-// the application in general is not meant to be interfaced
-// with concurrent callers.
-type socketClient struct {
-	cmn.BaseService
-
-	reqQueue    chan *ReqRes
-	flushTimer  *cmn.ThrottleTimer
-	mustConnect bool
-
-	mtx     sync.Mutex
-	addr    string
-	conn    net.Conn
-	err     error
-	reqSent *list.List
-	resCb   func(*types.Request, *types.Response) // listens to all callbacks
-
-}
-
-func NewSocketClient(addr string, mustConnect bool) *socketClient {
+// NewSocketClient creates a new socket client, which connects to a given
+// address. If mustConnect is true, the client will return an error upon start
+// if it fails to connect.
+func NewSocketClient(addr string, mustConnect bool) Client {
 	cli := &socketClient{
 		reqQueue:    make(chan *ReqRes, reqQueueSize),
-		flushTimer:  cmn.NewThrottleTimer("socketClient", flushThrottleMS),
+		flushTimer:  timer.NewThrottleTimer("socketClient", flushThrottleMS),
 		mustConnect: mustConnect,
 
 		addr:    addr,
 		reqSent: list.New(),
 		resCb:   nil,
 	}
-	cli.BaseService = *cmn.NewBaseService(nil, "socketClient", cli)
+	cli.BaseService = *service.NewBaseService(nil, "socketClient", cli)
 	return cli
 }
 
+// OnStart implements Service by connecting to the server and spawning reading
+// and writing goroutines.
 func (cli *socketClient) OnStart() error {
-	if err := cli.BaseService.OnStart(); err != nil {
-		return err
-	}
+	var (
+		err  error
+		conn net.Conn
+	)
 
-	var err error
-	var conn net.Conn
-RETRY_LOOP:
 	for {
-		conn, err = cmn.Connect(cli.addr)
+		conn, err = tmnet.Connect(cli.addr)
 		if err != nil {
 			if cli.mustConnect {
 				return err
 			}
-			cli.Logger.Error(fmt.Sprintf("abci.socketClient failed to connect to %v.  Retrying...", cli.addr), "err", err)
+			cli.Logger.Error(fmt.Sprintf("abci.socketClient failed to connect to %v.  Retrying after %vs...",
+				cli.addr, dialRetryIntervalSeconds), "err", err)
 			time.Sleep(time.Second * dialRetryIntervalSeconds)
-			continue RETRY_LOOP
+			continue
 		}
 		cli.conn = conn
 
@@ -80,41 +87,26 @@ RETRY_LOOP:
 	}
 }
 
+// OnStop implements Service by closing connection and flushing all queues.
 func (cli *socketClient) OnStop() {
-	cli.BaseService.OnStop()
-
-	cli.mtx.Lock()
-	defer cli.mtx.Unlock()
 	if cli.conn != nil {
 		cli.conn.Close()
 	}
 
 	cli.flushQueue()
+	cli.flushTimer.Stop()
 }
 
-// Stop the client and set the error
-func (cli *socketClient) StopForError(err error) {
-	if !cli.IsRunning() {
-		return
-	}
-
-	cli.mtx.Lock()
-	if cli.err == nil {
-		cli.err = err
-	}
-	cli.mtx.Unlock()
-
-	cli.Logger.Error(fmt.Sprintf("Stopping abci.socketClient for error: %v", err.Error()))
-	cli.Stop()
-}
-
+// Error returns an error if the client was stopped abruptly.
 func (cli *socketClient) Error() error {
 	cli.mtx.Lock()
 	defer cli.mtx.Unlock()
 	return cli.err
 }
 
-// Set listener for all responses
+// SetResponseCallback sets a callback, which will be executed for each
+// non-error & non-empty response from the server.
+//
 // NOTE: callback may get internally generated flush responses.
 func (cli *socketClient) SetResponseCallback(resCb Callback) {
 	cli.mtx.Lock()
@@ -124,12 +116,29 @@ func (cli *socketClient) SetResponseCallback(resCb Callback) {
 
 //----------------------------------------
 
-func (cli *socketClient) sendRequestsRoutine(conn net.Conn) {
-
+func (cli *socketClient) sendRequestsRoutine(conn io.Writer) {
 	w := bufio.NewWriter(conn)
 	for {
 		select {
-		case <-cli.flushTimer.Ch:
+		case reqres := <-cli.reqQueue:
+			// cli.Logger.Debug("Sent request", "requestType", reflect.TypeOf(reqres.Request), "request", reqres.Request)
+
+			cli.willSendReq(reqres)
+			err := types.WriteMessage(reqres.Request, w)
+			if err != nil {
+				cli.stopForError(fmt.Errorf("write to buffer: %w", err))
+				return
+			}
+
+			// If it's a flush request, flush the current buffer.
+			if _, ok := reqres.Request.Value.(*types.Request_Flush); ok {
+				err = w.Flush()
+				if err != nil {
+					cli.stopForError(fmt.Errorf("flush buffer: %w", err))
+					return
+				}
+			}
+		case <-cli.flushTimer.Ch: // flush queue
 			select {
 			case cli.reqQueue <- NewReqRes(types.ToRequestFlush()):
 			default:
@@ -137,45 +146,31 @@ func (cli *socketClient) sendRequestsRoutine(conn net.Conn) {
 			}
 		case <-cli.Quit():
 			return
-		case reqres := <-cli.reqQueue:
-			cli.willSendReq(reqres)
-			err := types.WriteMessage(reqres.Request, w)
-			if err != nil {
-				cli.StopForError(fmt.Errorf("Error writing msg: %v", err))
-				return
-			}
-			// cli.Logger.Debug("Sent request", "requestType", reflect.TypeOf(reqres.Request), "request", reqres.Request)
-			if _, ok := reqres.Request.Value.(*types.Request_Flush); ok {
-				err = w.Flush()
-				if err != nil {
-					cli.StopForError(fmt.Errorf("Error flushing writer: %v", err))
-					return
-				}
-			}
 		}
 	}
 }
 
-func (cli *socketClient) recvResponseRoutine(conn net.Conn) {
-
-	r := bufio.NewReader(conn) // Buffer reads
+func (cli *socketClient) recvResponseRoutine(conn io.Reader) {
+	r := bufio.NewReader(conn)
 	for {
 		var res = &types.Response{}
 		err := types.ReadMessage(r, res)
 		if err != nil {
-			cli.StopForError(err)
+			cli.stopForError(fmt.Errorf("read message: %w", err))
 			return
 		}
+
+		// cli.Logger.Debug("Received response", "responseType", reflect.TypeOf(res), "response", res)
+
 		switch r := res.Value.(type) {
-		case *types.Response_Exception:
+		case *types.Response_Exception: // app responded with error
 			// XXX After setting cli.err, release waiters (e.g. reqres.Done())
-			cli.StopForError(errors.New(r.Exception.Error))
+			cli.stopForError(errors.New(r.Exception.Error))
 			return
 		default:
-			// cli.Logger.Debug("Received response", "responseType", reflect.TypeOf(res), "response", res)
 			err := cli.didRecvResponse(res)
 			if err != nil {
-				cli.StopForError(err)
+				cli.stopForError(err)
 				return
 			}
 		}
@@ -192,31 +187,33 @@ func (cli *socketClient) didRecvResponse(res *types.Response) error {
 	cli.mtx.Lock()
 	defer cli.mtx.Unlock()
 
-	// Get the first ReqRes
+	// Get the first ReqRes.
 	next := cli.reqSent.Front()
 	if next == nil {
-		return fmt.Errorf("Unexpected result type %v when nothing expected", reflect.TypeOf(res.Value))
+		return fmt.Errorf("unexpected %v when nothing expected", reflect.TypeOf(res.Value))
 	}
+
 	reqres := next.Value.(*ReqRes)
 	if !resMatchesReq(reqres.Request, res) {
-		return fmt.Errorf("Unexpected result type %v when response to %v expected",
+		return fmt.Errorf("unexpected %v when response to %v expected",
 			reflect.TypeOf(res.Value), reflect.TypeOf(reqres.Request.Value))
 	}
 
-	reqres.Response = res    // Set response
-	reqres.Done()            // Release waiters
-	cli.reqSent.Remove(next) // Pop first item from linked list
+	reqres.Response = res
+	reqres.Done()            // release waiters
+	cli.reqSent.Remove(next) // pop first item from linked list
 
-	// Notify reqRes listener if set
-	if cb := reqres.GetCallback(); cb != nil {
-		cb(res)
-	}
-
-	// Notify client listener if set
+	// Notify client listener if set (global callback).
 	if cli.resCb != nil {
 		cli.resCb(reqres.Request, res)
 	}
 
+	// Notify reqRes listener if set (request specific callback).
+	//
+	// NOTE: It is possible this callback isn't set on the reqres object. At this
+	// point, in which case it will be called after, when it is set.
+	reqres.InvokeCallback()
+
 	return nil
 }
 
@@ -238,12 +235,12 @@ func (cli *socketClient) SetOptionAsync(req types.RequestSetOption) *ReqRes {
 	return cli.queueRequest(types.ToRequestSetOption(req))
 }
 
-func (cli *socketClient) DeliverTxAsync(tx []byte) *ReqRes {
-	return cli.queueRequest(types.ToRequestDeliverTx(tx))
+func (cli *socketClient) DeliverTxAsync(req types.RequestDeliverTx) *ReqRes {
+	return cli.queueRequest(types.ToRequestDeliverTx(req))
 }
 
-func (cli *socketClient) CheckTxAsync(tx []byte) *ReqRes {
-	return cli.queueRequest(types.ToRequestCheckTx(tx))
+func (cli *socketClient) CheckTxAsync(req types.RequestCheckTx) *ReqRes {
+	return cli.queueRequest(types.ToRequestCheckTx(req))
 }
 
 func (cli *socketClient) QueryAsync(req types.RequestQuery) *ReqRes {
@@ -266,6 +263,22 @@ func (cli *socketClient) EndBlockAsync(req types.RequestEndBlock) *ReqRes {
 	return cli.queueRequest(types.ToRequestEndBlock(req))
 }
 
+func (cli *socketClient) ListSnapshotsAsync(req types.RequestListSnapshots) *ReqRes {
+	return cli.queueRequest(types.ToRequestListSnapshots(req))
+}
+
+func (cli *socketClient) OfferSnapshotAsync(req types.RequestOfferSnapshot) *ReqRes {
+	return cli.queueRequest(types.ToRequestOfferSnapshot(req))
+}
+
+func (cli *socketClient) LoadSnapshotChunkAsync(req types.RequestLoadSnapshotChunk) *ReqRes {
+	return cli.queueRequest(types.ToRequestLoadSnapshotChunk(req))
+}
+
+func (cli *socketClient) ApplySnapshotChunkAsync(req types.RequestApplySnapshotChunk) *ReqRes {
+	return cli.queueRequest(types.ToRequestApplySnapshotChunk(req))
+}
+
 //----------------------------------------
 
 func (cli *socketClient) FlushSync() error {
@@ -279,64 +292,131 @@ func (cli *socketClient) FlushSync() error {
 
 func (cli *socketClient) EchoSync(msg string) (*types.ResponseEcho, error) {
 	reqres := cli.queueRequest(types.ToRequestEcho(msg))
-	cli.FlushSync()
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetEcho(), cli.Error()
 }
 
 func (cli *socketClient) InfoSync(req types.RequestInfo) (*types.ResponseInfo, error) {
 	reqres := cli.queueRequest(types.ToRequestInfo(req))
-	cli.FlushSync()
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetInfo(), cli.Error()
 }
 
 func (cli *socketClient) SetOptionSync(req types.RequestSetOption) (*types.ResponseSetOption, error) {
 	reqres := cli.queueRequest(types.ToRequestSetOption(req))
-	cli.FlushSync()
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetSetOption(), cli.Error()
 }
 
-func (cli *socketClient) DeliverTxSync(tx []byte) (*types.ResponseDeliverTx, error) {
-	reqres := cli.queueRequest(types.ToRequestDeliverTx(tx))
-	cli.FlushSync()
+func (cli *socketClient) DeliverTxSync(req types.RequestDeliverTx) (*types.ResponseDeliverTx, error) {
+	reqres := cli.queueRequest(types.ToRequestDeliverTx(req))
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetDeliverTx(), cli.Error()
 }
 
-func (cli *socketClient) CheckTxSync(tx []byte) (*types.ResponseCheckTx, error) {
-	reqres := cli.queueRequest(types.ToRequestCheckTx(tx))
-	cli.FlushSync()
+func (cli *socketClient) CheckTxSync(req types.RequestCheckTx) (*types.ResponseCheckTx, error) {
+	reqres := cli.queueRequest(types.ToRequestCheckTx(req))
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetCheckTx(), cli.Error()
 }
 
 func (cli *socketClient) QuerySync(req types.RequestQuery) (*types.ResponseQuery, error) {
 	reqres := cli.queueRequest(types.ToRequestQuery(req))
-	cli.FlushSync()
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetQuery(), cli.Error()
 }
 
 func (cli *socketClient) CommitSync() (*types.ResponseCommit, error) {
 	reqres := cli.queueRequest(types.ToRequestCommit())
-	cli.FlushSync()
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetCommit(), cli.Error()
 }
 
 func (cli *socketClient) InitChainSync(req types.RequestInitChain) (*types.ResponseInitChain, error) {
 	reqres := cli.queueRequest(types.ToRequestInitChain(req))
-	cli.FlushSync()
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetInitChain(), cli.Error()
 }
 
 func (cli *socketClient) BeginBlockSync(req types.RequestBeginBlock) (*types.ResponseBeginBlock, error) {
 	reqres := cli.queueRequest(types.ToRequestBeginBlock(req))
-	cli.FlushSync()
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetBeginBlock(), cli.Error()
 }
 
 func (cli *socketClient) EndBlockSync(req types.RequestEndBlock) (*types.ResponseEndBlock, error) {
 	reqres := cli.queueRequest(types.ToRequestEndBlock(req))
-	cli.FlushSync()
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
 	return reqres.Response.GetEndBlock(), cli.Error()
 }
 
+func (cli *socketClient) ListSnapshotsSync(req types.RequestListSnapshots) (*types.ResponseListSnapshots, error) {
+	reqres := cli.queueRequest(types.ToRequestListSnapshots(req))
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
+	return reqres.Response.GetListSnapshots(), cli.Error()
+}
+
+func (cli *socketClient) OfferSnapshotSync(req types.RequestOfferSnapshot) (*types.ResponseOfferSnapshot, error) {
+	reqres := cli.queueRequest(types.ToRequestOfferSnapshot(req))
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
+	return reqres.Response.GetOfferSnapshot(), cli.Error()
+}
+
+func (cli *socketClient) LoadSnapshotChunkSync(
+	req types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error) {
+	reqres := cli.queueRequest(types.ToRequestLoadSnapshotChunk(req))
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+
+	return reqres.Response.GetLoadSnapshotChunk(), cli.Error()
+}
+
+func (cli *socketClient) ApplySnapshotChunkSync(
+	req types.RequestApplySnapshotChunk) (*types.ResponseApplySnapshotChunk, error) {
+	reqres := cli.queueRequest(types.ToRequestApplySnapshotChunk(req))
+	if err := cli.FlushSync(); err != nil {
+		return nil, err
+	}
+	return reqres.Response.GetApplySnapshotChunk(), cli.Error()
+}
+
 //----------------------------------------
 
 func (cli *socketClient) queueRequest(req *types.Request) *ReqRes {
@@ -357,6 +437,9 @@ func (cli *socketClient) queueRequest(req *types.Request) *ReqRes {
 }
 
 func (cli *socketClient) flushQueue() {
+	cli.mtx.Lock()
+	defer cli.mtx.Unlock()
+
 	// mark all in-flight messages as resolved (they will get cli.Error())
 	for req := cli.reqSent.Front(); req != nil; req = req.Next() {
 		reqres := req.Value.(*ReqRes)
@@ -401,6 +484,31 @@ func resMatchesReq(req *types.Request, res *types.Response) (ok bool) {
 		_, ok = res.Value.(*types.Response_BeginBlock)
 	case *types.Request_EndBlock:
 		_, ok = res.Value.(*types.Response_EndBlock)
+	case *types.Request_ApplySnapshotChunk:
+		_, ok = res.Value.(*types.Response_ApplySnapshotChunk)
+	case *types.Request_LoadSnapshotChunk:
+		_, ok = res.Value.(*types.Response_LoadSnapshotChunk)
+	case *types.Request_ListSnapshots:
+		_, ok = res.Value.(*types.Response_ListSnapshots)
+	case *types.Request_OfferSnapshot:
+		_, ok = res.Value.(*types.Response_OfferSnapshot)
 	}
 	return ok
 }
+
+func (cli *socketClient) stopForError(err error) {
+	if !cli.IsRunning() {
+		return
+	}
+
+	cli.mtx.Lock()
+	if cli.err == nil {
+		cli.err = err
+	}
+	cli.mtx.Unlock()
+
+	cli.Logger.Error(fmt.Sprintf("Stopping abci.socketClient for error: %v", err.Error()))
+	if err := cli.Stop(); err != nil {
+		cli.Logger.Error("Error stopping abci.socketClient", "err", err)
+	}
+}

abci/client/socket_client_test.go

@@ -1,7 +1,6 @@
 package abcicli_test
 
 import (
-	"errors"
 	"fmt"
 	"testing"
 	"time"
@@ -12,40 +11,31 @@ import (
 	abcicli "github.com/tendermint/tendermint/abci/client"
 	"github.com/tendermint/tendermint/abci/server"
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmrand "github.com/tendermint/tendermint/libs/rand"
+	"github.com/tendermint/tendermint/libs/service"
 )
 
-func TestSocketClientStopForErrorDeadlock(t *testing.T) {
-	c := abcicli.NewSocketClient(":80", false)
-	err := errors.New("foo-tendermint")
-
-	// See Issue https://github.com/tendermint/abci/issues/114
-	doneChan := make(chan bool)
-	go func() {
-		defer close(doneChan)
-		c.StopForError(err)
-		c.StopForError(err)
-	}()
-
-	select {
-	case <-doneChan:
-	case <-time.After(time.Second * 4):
-		t.Fatalf("Test took too long, potential deadlock still exists")
-	}
-}
-
 func TestProperSyncCalls(t *testing.T) {
 	app := slowApp{}
 
 	s, c := setupClientServer(t, app)
-	defer s.Stop()
-	defer c.Stop()
+	t.Cleanup(func() {
+		if err := s.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
+	t.Cleanup(func() {
+		if err := c.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
 
 	resp := make(chan error, 1)
 	go func() {
 		// This is BeginBlockSync unrolled....
 		reqres := c.BeginBlockAsync(types.RequestBeginBlock{})
-		c.FlushSync()
+		err := c.FlushSync()
+		require.NoError(t, err)
 		res := reqres.Response.GetBeginBlock()
 		require.NotNil(t, res)
 		resp <- c.Error()
@@ -64,8 +54,16 @@ func TestHangingSyncCalls(t *testing.T) {
 	app := slowApp{}
 
 	s, c := setupClientServer(t, app)
-	defer s.Stop()
-	defer c.Stop()
+	t.Cleanup(func() {
+		if err := s.Stop(); err != nil {
+			t.Log(err)
+		}
+	})
+	t.Cleanup(func() {
+		if err := c.Stop(); err != nil {
+			t.Log(err)
+		}
+	})
 
 	resp := make(chan error, 1)
 	go func() {
@@ -76,7 +74,8 @@ func TestHangingSyncCalls(t *testing.T) {
 		// no response yet from server
 		time.Sleep(20 * time.Millisecond)
 		// kill the server, so the connections break
-		s.Stop()
+		err := s.Stop()
+		require.NoError(t, err)
 
 		// wait for the response from BeginBlock
 		reqres.Wait()
@@ -94,9 +93,9 @@ func TestHangingSyncCalls(t *testing.T) {
 }
 
 func setupClientServer(t *testing.T, app types.Application) (
-	cmn.Service, abcicli.Client) {
+	service.Service, abcicli.Client) {
 	// some port between 20k and 30k
-	port := 20000 + cmn.RandInt32()%10000
+	port := 20000 + tmrand.Int32()%10000
 	addr := fmt.Sprintf("localhost:%d", port)
 
 	s, err := server.NewServer(addr, "socket", app)

abci/cmd/abci-cli/abci-cli.go

@@ -11,8 +11,8 @@ import (
 
 	"github.com/spf13/cobra"
 
-	cmn "github.com/tendermint/tendermint/libs/common"
 	"github.com/tendermint/tendermint/libs/log"
+	tmos "github.com/tendermint/tendermint/libs/os"
 
 	abcicli "github.com/tendermint/tendermint/abci/client"
 	"github.com/tendermint/tendermint/abci/example/code"
@@ -22,7 +22,7 @@ import (
 	servertest "github.com/tendermint/tendermint/abci/tests/server"
 	"github.com/tendermint/tendermint/abci/types"
 	"github.com/tendermint/tendermint/abci/version"
-	"github.com/tendermint/tendermint/crypto/merkle"
+	"github.com/tendermint/tendermint/proto/tendermint/crypto"
 )
 
 // client is a global variable so it can be reused by the console
@@ -98,10 +98,10 @@ type response struct {
 }
 
 type queryResponse struct {
-	Key    []byte
-	Value  []byte
-	Height int64
-	Proof  *merkle.Proof
+	Key      []byte
+	Value    []byte
+	Height   int64
+	ProofOps *crypto.ProofOps
 }
 
 func Execute() error {
@@ -111,16 +111,28 @@ func Execute() error {
 }
 
 func addGlobalFlags() {
-	RootCmd.PersistentFlags().StringVarP(&flagAddress, "address", "", "tcp://0.0.0.0:26658", "address of application socket")
+	RootCmd.PersistentFlags().StringVarP(&flagAddress,
+		"address",
+		"",
+		"tcp://0.0.0.0:26658",
+		"address of application socket")
 	RootCmd.PersistentFlags().StringVarP(&flagAbci, "abci", "", "socket", "either socket or grpc")
-	RootCmd.PersistentFlags().BoolVarP(&flagVerbose, "verbose", "v", false, "print the command and results as if it were a console session")
+	RootCmd.PersistentFlags().BoolVarP(&flagVerbose,
+		"verbose",
+		"v",
+		false,
+		"print the command and results as if it were a console session")
 	RootCmd.PersistentFlags().StringVarP(&flagLogLevel, "log_level", "", "debug", "set the logger level")
 }
 
 func addQueryFlags() {
 	queryCmd.PersistentFlags().StringVarP(&flagPath, "path", "", "/store", "path to prefix query with")
 	queryCmd.PersistentFlags().IntVarP(&flagHeight, "height", "", 0, "height to query the blockchain at")
-	queryCmd.PersistentFlags().BoolVarP(&flagProve, "prove", "", false, "whether or not to return a merkle proof of the query result")
+	queryCmd.PersistentFlags().BoolVarP(&flagProve,
+		"prove",
+		"",
+		false,
+		"whether or not to return a merkle proof of the query result")
 }
 
 func addCounterFlags() {
@@ -174,9 +186,7 @@ where example.file looks something like:
     info
 `,
 	Args: cobra.ExactArgs(0),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdBatch(cmd, args)
-	},
+	RunE: cmdBatch,
 }
 
 var consoleCmd = &cobra.Command{
@@ -189,9 +199,7 @@ without opening a new connection each time
 `,
 	Args:      cobra.ExactArgs(0),
 	ValidArgs: []string{"echo", "info", "set_option", "deliver_tx", "check_tx", "commit", "query"},
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdConsole(cmd, args)
-	},
+	RunE:      cmdConsole,
 }
 
 var echoCmd = &cobra.Command{
@@ -199,27 +207,21 @@ var echoCmd = &cobra.Command{
 	Short: "have the application echo a message",
 	Long:  "have the application echo a message",
 	Args:  cobra.ExactArgs(1),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdEcho(cmd, args)
-	},
+	RunE:  cmdEcho,
 }
 var infoCmd = &cobra.Command{
 	Use:   "info",
 	Short: "get some info about the application",
 	Long:  "get some info about the application",
 	Args:  cobra.ExactArgs(0),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdInfo(cmd, args)
-	},
+	RunE:  cmdInfo,
 }
 var setOptionCmd = &cobra.Command{
 	Use:   "set_option",
 	Short: "set an option on the application",
 	Long:  "set an option on the application",
 	Args:  cobra.ExactArgs(2),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdSetOption(cmd, args)
-	},
+	RunE:  cmdSetOption,
 }
 
 var deliverTxCmd = &cobra.Command{
@@ -227,9 +229,7 @@ var deliverTxCmd = &cobra.Command{
 	Short: "deliver a new transaction to the application",
 	Long:  "deliver a new transaction to the application",
 	Args:  cobra.ExactArgs(1),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdDeliverTx(cmd, args)
-	},
+	RunE:  cmdDeliverTx,
 }
 
 var checkTxCmd = &cobra.Command{
@@ -237,9 +237,7 @@ var checkTxCmd = &cobra.Command{
 	Short: "validate a transaction",
 	Long:  "validate a transaction",
 	Args:  cobra.ExactArgs(1),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdCheckTx(cmd, args)
-	},
+	RunE:  cmdCheckTx,
 }
 
 var commitCmd = &cobra.Command{
@@ -247,9 +245,7 @@ var commitCmd = &cobra.Command{
 	Short: "commit the application state and return the Merkle root hash",
 	Long:  "commit the application state and return the Merkle root hash",
 	Args:  cobra.ExactArgs(0),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdCommit(cmd, args)
-	},
+	RunE:  cmdCommit,
 }
 
 var versionCmd = &cobra.Command{
@@ -268,9 +264,7 @@ var queryCmd = &cobra.Command{
 	Short: "query the application state",
 	Long:  "query the application state",
 	Args:  cobra.ExactArgs(1),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdQuery(cmd, args)
-	},
+	RunE:  cmdQuery,
 }
 
 var counterCmd = &cobra.Command{
@@ -278,9 +272,7 @@ var counterCmd = &cobra.Command{
 	Short: "ABCI demo example",
 	Long:  "ABCI demo example",
 	Args:  cobra.ExactArgs(0),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdCounter(cmd, args)
-	},
+	RunE:  cmdCounter,
 }
 
 var kvstoreCmd = &cobra.Command{
@@ -288,9 +280,7 @@ var kvstoreCmd = &cobra.Command{
 	Short: "ABCI demo example",
 	Long:  "ABCI demo example",
 	Args:  cobra.ExactArgs(0),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdKVStore(cmd, args)
-	},
+	RunE:  cmdKVStore,
 }
 
 var testCmd = &cobra.Command{
@@ -298,9 +288,7 @@ var testCmd = &cobra.Command{
 	Short: "run integration tests",
 	Long:  "run integration tests",
 	Args:  cobra.ExactArgs(0),
-	RunE: func(cmd *cobra.Command, args []string) error {
-		return cmdTest(cmd, args)
-	},
+	RunE:  cmdTest,
 }
 
 // Generates new Args array based off of previous call args to maintain flag persistence
@@ -322,14 +310,14 @@ func persistentArgs(line []byte) []string {
 func compose(fs []func() error) error {
 	if len(fs) == 0 {
 		return nil
-	} else {
-		err := fs[0]()
-		if err == nil {
-			return compose(fs[1:])
-		} else {
-			return err
-		}
 	}
+
+	err := fs[0]()
+	if err == nil {
+		return compose(fs[1:])
+	}
+
+	return err
 }
 
 func cmdTest(cmd *cobra.Command, args []string) error {
@@ -356,16 +344,18 @@ func cmdTest(cmd *cobra.Command, args []string) error {
 
 func cmdBatch(cmd *cobra.Command, args []string) error {
 	bufReader := bufio.NewReader(os.Stdin)
+LOOP:
 	for {
 
 		line, more, err := bufReader.ReadLine()
-		if more {
-			return errors.New("Input line is too long")
-		} else if err == io.EOF {
-			break
-		} else if len(line) == 0 {
+		switch {
+		case more:
+			return errors.New("input line is too long")
+		case err == io.EOF:
+			break LOOP
+		case len(line) == 0:
 			continue
-		} else if err != nil {
+		case err != nil:
 			return err
 		}
 
@@ -384,7 +374,7 @@ func cmdConsole(cmd *cobra.Command, args []string) error {
 		bufReader := bufio.NewReader(os.Stdin)
 		line, more, err := bufReader.ReadLine()
 		if more {
-			return errors.New("Input is too long")
+			return errors.New("input is too long")
 		} else if err != nil {
 			return err
 		}
@@ -394,7 +384,6 @@ func cmdConsole(cmd *cobra.Command, args []string) error {
 			return err
 		}
 	}
-	return nil
 }
 
 func muxOnCommands(cmd *cobra.Command, pArgs []string) error {
@@ -420,7 +409,7 @@ func muxOnCommands(cmd *cobra.Command, pArgs []string) error {
 			}
 
 			// otherwise, we need to skip the next one too
-			i += 1
+			i++
 			continue
 		}
 
@@ -547,7 +536,7 @@ func cmdDeliverTx(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
-	res, err := client.DeliverTxSync(txBytes)
+	res, err := client.DeliverTxSync(types.RequestDeliverTx{Tx: txBytes})
 	if err != nil {
 		return err
 	}
@@ -573,7 +562,7 @@ func cmdCheckTx(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
-	res, err := client.CheckTxSync(txBytes)
+	res, err := client.CheckTxSync(types.RequestCheckTx{Tx: txBytes})
 	if err != nil {
 		return err
 	}
@@ -627,19 +616,17 @@ func cmdQuery(cmd *cobra.Command, args []string) error {
 		Info: resQuery.Info,
 		Log:  resQuery.Log,
 		Query: &queryResponse{
-			Key:    resQuery.Key,
-			Value:  resQuery.Value,
-			Height: resQuery.Height,
-			Proof:  resQuery.Proof,
+			Key:      resQuery.Key,
+			Value:    resQuery.Value,
+			Height:   resQuery.Height,
+			ProofOps: resQuery.ProofOps,
 		},
 	})
 	return nil
 }
 
 func cmdCounter(cmd *cobra.Command, args []string) error {
-
-	app := counter.NewCounterApplication(flagSerial)
-
+	app := counter.NewApplication(flagSerial)
 	logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout))
 
 	// Start the listener
@@ -652,12 +639,16 @@ func cmdCounter(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	// Wait forever
-	cmn.TrapSignal(func() {
+	// Stop upon receiving SIGTERM or CTRL-C.
+	tmos.TrapSignal(logger, func() {
 		// Cleanup
-		srv.Stop()
+		if err := srv.Stop(); err != nil {
+			logger.Error("Error while stopping server", "err", err)
+		}
 	})
-	return nil
+
+	// Run forever.
+	select {}
 }
 
 func cmdKVStore(cmd *cobra.Command, args []string) error {
@@ -666,7 +657,7 @@ func cmdKVStore(cmd *cobra.Command, args []string) error {
 	// Create the application - in memory or persisted to disk
 	var app types.Application
 	if flagPersist == "" {
-		app = kvstore.NewKVStoreApplication()
+		app = kvstore.NewApplication()
 	} else {
 		app = kvstore.NewPersistentKVStoreApplication(flagPersist)
 		app.(*kvstore.PersistentKVStoreApplication).SetLogger(logger.With("module", "kvstore"))
@@ -682,12 +673,16 @@ func cmdKVStore(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	// Wait forever
-	cmn.TrapSignal(func() {
+	// Stop upon receiving SIGTERM or CTRL-C.
+	tmos.TrapSignal(logger, func() {
 		// Cleanup
-		srv.Stop()
+		if err := srv.Stop(); err != nil {
+			logger.Error("Error while stopping server", "err", err)
+		}
 	})
-	return nil
+
+	// Run forever.
+	select {}
 }
 
 //--------------------------------------------------------------------------------
@@ -728,8 +723,8 @@ func printResponse(cmd *cobra.Command, args []string, rsp response) {
 			fmt.Printf("-> value: %s\n", rsp.Query.Value)
 			fmt.Printf("-> value.hex: %X\n", rsp.Query.Value)
 		}
-		if rsp.Query.Proof != nil {
-			fmt.Printf("-> proof: %#v\n", rsp.Query.Proof)
+		if rsp.Query.ProofOps != nil {
+			fmt.Printf("-> proof: %#v\n", rsp.Query.ProofOps)
 		}
 	}
 }
@@ -739,14 +734,14 @@ func stringOrHexToBytes(s string) ([]byte, error) {
 	if len(s) > 2 && strings.ToLower(s[:2]) == "0x" {
 		b, err := hex.DecodeString(s[2:])
 		if err != nil {
-			err = fmt.Errorf("Error decoding hex argument: %s", err.Error())
+			err = fmt.Errorf("error decoding hex argument: %s", err.Error())
 			return nil, err
 		}
 		return b, nil
 	}
 
 	if !strings.HasPrefix(s, "\"") || !strings.HasSuffix(s, "\"") {
-		err := fmt.Errorf("Invalid string arg: \"%s\". Must be quoted or a \"0x\"-prefixed hex string", s)
+		err := fmt.Errorf("invalid string arg: \"%s\". Must be quoted or a \"0x\"-prefixed hex string", s)
 		return nil, err
 	}
 

abci/example/counter/counter.go

@@ -8,7 +8,7 @@ import (
 	"github.com/tendermint/tendermint/abci/types"
 )
 
-type CounterApplication struct {
+type Application struct {
 	types.BaseApplication
 
 	hashCount int
@@ -16,15 +16,15 @@ type CounterApplication struct {
 	serial    bool
 }
 
-func NewCounterApplication(serial bool) *CounterApplication {
-	return &CounterApplication{serial: serial}
+func NewApplication(serial bool) *Application {
+	return &Application{serial: serial}
 }
 
-func (app *CounterApplication) Info(req types.RequestInfo) types.ResponseInfo {
+func (app *Application) Info(req types.RequestInfo) types.ResponseInfo {
 	return types.ResponseInfo{Data: fmt.Sprintf("{\"hashes\":%v,\"txs\":%v}", app.hashCount, app.txCount)}
 }
 
-func (app *CounterApplication) SetOption(req types.RequestSetOption) types.ResponseSetOption {
+func (app *Application) SetOption(req types.RequestSetOption) types.ResponseSetOption {
 	key, value := req.Key, req.Value
 	if key == "serial" && value == "on" {
 		app.serial = true
@@ -42,15 +42,15 @@ func (app *CounterApplication) SetOption(req types.RequestSetOption) types.Respo
 	return types.ResponseSetOption{}
 }
 
-func (app *CounterApplication) DeliverTx(tx []byte) types.ResponseDeliverTx {
+func (app *Application) DeliverTx(req types.RequestDeliverTx) types.ResponseDeliverTx {
 	if app.serial {
-		if len(tx) > 8 {
+		if len(req.Tx) > 8 {
 			return types.ResponseDeliverTx{
 				Code: code.CodeTypeEncodingError,
-				Log:  fmt.Sprintf("Max tx size is 8 bytes, got %d", len(tx))}
+				Log:  fmt.Sprintf("Max tx size is 8 bytes, got %d", len(req.Tx))}
 		}
 		tx8 := make([]byte, 8)
-		copy(tx8[len(tx8)-len(tx):], tx)
+		copy(tx8[len(tx8)-len(req.Tx):], req.Tx)
 		txValue := binary.BigEndian.Uint64(tx8)
 		if txValue != uint64(app.txCount) {
 			return types.ResponseDeliverTx{
@@ -62,15 +62,15 @@ func (app *CounterApplication) DeliverTx(tx []byte) types.ResponseDeliverTx {
 	return types.ResponseDeliverTx{Code: code.CodeTypeOK}
 }
 
-func (app *CounterApplication) CheckTx(tx []byte) types.ResponseCheckTx {
+func (app *Application) CheckTx(req types.RequestCheckTx) types.ResponseCheckTx {
 	if app.serial {
-		if len(tx) > 8 {
+		if len(req.Tx) > 8 {
 			return types.ResponseCheckTx{
 				Code: code.CodeTypeEncodingError,
-				Log:  fmt.Sprintf("Max tx size is 8 bytes, got %d", len(tx))}
+				Log:  fmt.Sprintf("Max tx size is 8 bytes, got %d", len(req.Tx))}
 		}
 		tx8 := make([]byte, 8)
-		copy(tx8[len(tx8)-len(tx):], tx)
+		copy(tx8[len(tx8)-len(req.Tx):], req.Tx)
 		txValue := binary.BigEndian.Uint64(tx8)
 		if txValue < uint64(app.txCount) {
 			return types.ResponseCheckTx{
@@ -81,7 +81,7 @@ func (app *CounterApplication) CheckTx(tx []byte) types.ResponseCheckTx {
 	return types.ResponseCheckTx{Code: code.CodeTypeOK}
 }
 
-func (app *CounterApplication) Commit() (resp types.ResponseCommit) {
+func (app *Application) Commit() (resp types.ResponseCommit) {
 	app.hashCount++
 	if app.txCount == 0 {
 		return types.ResponseCommit{}
@@ -91,7 +91,7 @@ func (app *CounterApplication) Commit() (resp types.ResponseCommit) {
 	return types.ResponseCommit{Data: hash}
 }
 
-func (app *CounterApplication) Query(reqQuery types.RequestQuery) types.ResponseQuery {
+func (app *Application) Query(reqQuery types.RequestQuery) types.ResponseQuery {
 	switch reqQuery.Path {
 	case "hash":
 		return types.ResponseQuery{Value: []byte(fmt.Sprintf("%v", app.hashCount))}

abci/example/example_test.go

@@ -2,7 +2,9 @@ package example
 
 import (
 	"fmt"
+	"math/rand"
 	"net"
+	"os"
 	"reflect"
 	"testing"
 	"time"
@@ -13,8 +15,8 @@ import (
 
 	"golang.org/x/net/context"
 
-	cmn "github.com/tendermint/tendermint/libs/common"
 	"github.com/tendermint/tendermint/libs/log"
+	tmnet "github.com/tendermint/tendermint/libs/net"
 
 	abcicli "github.com/tendermint/tendermint/abci/client"
 	"github.com/tendermint/tendermint/abci/example/code"
@@ -23,9 +25,13 @@ import (
 	"github.com/tendermint/tendermint/abci/types"
 )
 
+func init() {
+	rand.Seed(time.Now().UnixNano())
+}
+
 func TestKVStore(t *testing.T) {
 	fmt.Println("### Testing KVStore")
-	testStream(t, kvstore.NewKVStoreApplication())
+	testStream(t, kvstore.NewApplication())
 }
 
 func TestBaseApp(t *testing.T) {
@@ -40,22 +46,33 @@ func TestGRPC(t *testing.T) {
 
 func testStream(t *testing.T, app types.Application) {
 	numDeliverTxs := 20000
+	socketFile := fmt.Sprintf("test-%08x.sock", rand.Int31n(1<<30))
+	defer os.Remove(socketFile)
+	socket := fmt.Sprintf("unix://%v", socketFile)
 
 	// Start the listener
-	server := abciserver.NewSocketServer("unix://test.sock", app)
+	server := abciserver.NewSocketServer(socket, app)
 	server.SetLogger(log.TestingLogger().With("module", "abci-server"))
 	if err := server.Start(); err != nil {
 		require.NoError(t, err, "Error starting socket server")
 	}
-	defer server.Stop()
+	t.Cleanup(func() {
+		if err := server.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
 
 	// Connect to the socket
-	client := abcicli.NewSocketClient("unix://test.sock", false)
+	client := abcicli.NewSocketClient(socket, false)
 	client.SetLogger(log.TestingLogger().With("module", "abci-client"))
 	if err := client.Start(); err != nil {
 		t.Fatalf("Error starting socket client: %v", err.Error())
 	}
-	defer client.Stop()
+	t.Cleanup(func() {
+		if err := client.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
 
 	done := make(chan struct{})
 	counter := 0
@@ -87,7 +104,7 @@ func testStream(t *testing.T, app types.Application) {
 	// Write requests
 	for counter := 0; counter < numDeliverTxs; counter++ {
 		// Send request
-		reqRes := client.DeliverTxAsync([]byte("test"))
+		reqRes := client.DeliverTxAsync(types.RequestDeliverTx{Tx: []byte("test")})
 		_ = reqRes
 		// check err ?
 
@@ -107,27 +124,41 @@ func testStream(t *testing.T, app types.Application) {
 //-------------------------
 // test grpc
 
-func dialerFunc(addr string, timeout time.Duration) (net.Conn, error) {
-	return cmn.Connect(addr)
+func dialerFunc(ctx context.Context, addr string) (net.Conn, error) {
+	return tmnet.Connect(addr)
 }
 
-func testGRPCSync(t *testing.T, app *types.GRPCApplication) {
+func testGRPCSync(t *testing.T, app types.ABCIApplicationServer) {
 	numDeliverTxs := 2000
+	socketFile := fmt.Sprintf("/tmp/test-%08x.sock", rand.Int31n(1<<30))
+	defer os.Remove(socketFile)
+	socket := fmt.Sprintf("unix://%v", socketFile)
 
 	// Start the listener
-	server := abciserver.NewGRPCServer("unix://test.sock", app)
+	server := abciserver.NewGRPCServer(socket, app)
 	server.SetLogger(log.TestingLogger().With("module", "abci-server"))
 	if err := server.Start(); err != nil {
 		t.Fatalf("Error starting GRPC server: %v", err.Error())
 	}
-	defer server.Stop()
+
+	t.Cleanup(func() {
+		if err := server.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
 
 	// Connect to the socket
-	conn, err := grpc.Dial("unix://test.sock", grpc.WithInsecure(), grpc.WithDialer(dialerFunc))
+	//nolint:staticcheck // SA1019 Existing use of deprecated but supported dial option.
+	conn, err := grpc.Dial(socket, grpc.WithInsecure(), grpc.WithContextDialer(dialerFunc))
 	if err != nil {
 		t.Fatalf("Error dialing GRPC server: %v", err.Error())
 	}
-	defer conn.Close()
+
+	t.Cleanup(func() {
+		if err := conn.Close(); err != nil {
+			t.Error(err)
+		}
+	})
 
 	client := types.NewABCIApplicationClient(conn)
 

abci/example/js/.gitignore

@@ -1 +0,0 @@
-node_modules

abci/example/js/README.md

@@ -1 +0,0 @@
-This example has been moved here: https://github.com/tendermint/js-abci/tree/master/example

abci/example/kvstore/README.md

@@ -21,11 +21,10 @@ The state is persisted in leveldb along with the last block committed,
 and the Handshake allows any necessary blocks to be replayed.
 Validator set changes are effected using the following transaction format:
 
-```
-val:pubkey1/power1,addr2/power2,addr3/power3"
+```md
+"val:pubkey1!power1,pubkey2!power2,pubkey3!power3"
 ```
 
-where `power1` is the new voting power for the validator with `pubkey1` (possibly a new one).
+where `pubkeyN` is a base64-encoded 32-byte ed25519 key and `powerN` is a new voting power for the validator with `pubkeyN` (possibly a new one).
+To remove a validator from the validator set, set power to `0`.
 There is no sybil protection against new validators joining. 
-Validators can be removed by setting their power to `0`.
-

abci/example/kvstore/helpers.go

@@ -2,15 +2,15 @@ package kvstore
 
 import (
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmrand "github.com/tendermint/tendermint/libs/rand"
 )
 
 // RandVal creates one random validator, with a key derived
 // from the input value
 func RandVal(i int) types.ValidatorUpdate {
-	pubkey := cmn.RandBytes(32)
-	power := cmn.RandUint16() + 1
-	v := types.Ed25519ValidatorUpdate(pubkey, int64(power))
+	pubkey := tmrand.Bytes(32)
+	power := tmrand.Uint16() + 1
+	v := types.UpdateValidator(pubkey, int64(power), "")
 	return v
 }
 

abci/example/kvstore/kvstore.go

@@ -6,10 +6,10 @@ import (
 	"encoding/json"
 	"fmt"
 
+	dbm "github.com/tendermint/tm-db"
+
 	"github.com/tendermint/tendermint/abci/example/code"
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
-	dbm "github.com/tendermint/tendermint/libs/db"
 	"github.com/tendermint/tendermint/version"
 )
 
@@ -17,7 +17,7 @@ var (
 	stateKey        = []byte("stateKey")
 	kvPairPrefixKey = []byte("kvPairKey:")
 
-	ProtocolVersion version.Protocol = 0x1
+	ProtocolVersion uint64 = 0x1
 )
 
 type State struct {
@@ -28,15 +28,19 @@ type State struct {
 }
 
 func loadState(db dbm.DB) State {
-	stateBytes := db.Get(stateKey)
 	var state State
-	if len(stateBytes) != 0 {
-		err := json.Unmarshal(stateBytes, &state)
-		if err != nil {
-			panic(err)
-		}
-	}
 	state.db = db
+	stateBytes, err := db.Get(stateKey)
+	if err != nil {
+		panic(err)
+	}
+	if len(stateBytes) == 0 {
+		return state
+	}
+	err = json.Unmarshal(stateBytes, &state)
+	if err != nil {
+		panic(err)
+	}
 	return state
 }
 
@@ -45,7 +49,10 @@ func saveState(state State) {
 	if err != nil {
 		panic(err)
 	}
-	state.db.Set(stateKey, stateBytes)
+	err = state.db.Set(stateKey, stateBytes)
+	if err != nil {
+		panic(err)
+	}
 }
 
 func prefixKey(key []byte) []byte {
@@ -54,81 +61,112 @@ func prefixKey(key []byte) []byte {
 
 //---------------------------------------------------
 
-var _ types.Application = (*KVStoreApplication)(nil)
+var _ types.Application = (*Application)(nil)
 
-type KVStoreApplication struct {
+type Application struct {
 	types.BaseApplication
 
-	state State
+	state        State
+	RetainBlocks int64 // blocks to retain after commit (via ResponseCommit.RetainHeight)
 }
 
-func NewKVStoreApplication() *KVStoreApplication {
+func NewApplication() *Application {
 	state := loadState(dbm.NewMemDB())
-	return &KVStoreApplication{state: state}
+	return &Application{state: state}
 }
 
-func (app *KVStoreApplication) Info(req types.RequestInfo) (resInfo types.ResponseInfo) {
+func (app *Application) Info(req types.RequestInfo) (resInfo types.ResponseInfo) {
 	return types.ResponseInfo{
-		Data:       fmt.Sprintf("{\"size\":%v}", app.state.Size),
-		Version:    version.ABCIVersion,
-		AppVersion: ProtocolVersion.Uint64(),
+		Data:             fmt.Sprintf("{\"size\":%v}", app.state.Size),
+		Version:          version.ABCIVersion,
+		AppVersion:       ProtocolVersion,
+		LastBlockHeight:  app.state.Height,
+		LastBlockAppHash: app.state.AppHash,
 	}
 }
 
 // tx is either "key=value" or just arbitrary bytes
-func (app *KVStoreApplication) DeliverTx(tx []byte) types.ResponseDeliverTx {
+func (app *Application) DeliverTx(req types.RequestDeliverTx) types.ResponseDeliverTx {
 	var key, value []byte
-	parts := bytes.Split(tx, []byte("="))
+	parts := bytes.Split(req.Tx, []byte("="))
 	if len(parts) == 2 {
 		key, value = parts[0], parts[1]
 	} else {
-		key, value = tx, tx
+		key, value = req.Tx, req.Tx
 	}
-	app.state.db.Set(prefixKey(key), value)
-	app.state.Size += 1
 
-	tags := []cmn.KVPair{
-		{Key: []byte("app.creator"), Value: []byte("Cosmoshi Netowoko")},
-		{Key: []byte("app.key"), Value: key},
+	err := app.state.db.Set(prefixKey(key), value)
+	if err != nil {
+		panic(err)
 	}
-	return types.ResponseDeliverTx{Code: code.CodeTypeOK, Tags: tags}
+	app.state.Size++
+
+	events := []types.Event{
+		{
+			Type: "app",
+			Attributes: []types.EventAttribute{
+				{Key: []byte("creator"), Value: []byte("Cosmoshi Netowoko"), Index: true},
+				{Key: []byte("key"), Value: key, Index: true},
+				{Key: []byte("index_key"), Value: []byte("index is working"), Index: true},
+				{Key: []byte("noindex_key"), Value: []byte("index is working"), Index: false},
+			},
+		},
+	}
+
+	return types.ResponseDeliverTx{Code: code.CodeTypeOK, Events: events}
 }
 
-func (app *KVStoreApplication) CheckTx(tx []byte) types.ResponseCheckTx {
+func (app *Application) CheckTx(req types.RequestCheckTx) types.ResponseCheckTx {
 	return types.ResponseCheckTx{Code: code.CodeTypeOK, GasWanted: 1}
 }
 
-func (app *KVStoreApplication) Commit() types.ResponseCommit {
+func (app *Application) Commit() types.ResponseCommit {
 	// Using a memdb - just return the big endian size of the db
 	appHash := make([]byte, 8)
 	binary.PutVarint(appHash, app.state.Size)
 	app.state.AppHash = appHash
-	app.state.Height += 1
+	app.state.Height++
 	saveState(app.state)
-	return types.ResponseCommit{Data: appHash}
+
+	resp := types.ResponseCommit{Data: appHash}
+	if app.RetainBlocks > 0 && app.state.Height >= app.RetainBlocks {
+		resp.RetainHeight = app.state.Height - app.RetainBlocks + 1
+	}
+	return resp
 }
 
-func (app *KVStoreApplication) Query(reqQuery types.RequestQuery) (resQuery types.ResponseQuery) {
+// Returns an associated value or nil if missing.
+func (app *Application) Query(reqQuery types.RequestQuery) (resQuery types.ResponseQuery) {
 	if reqQuery.Prove {
-		value := app.state.db.Get(prefixKey(reqQuery.Data))
+		value, err := app.state.db.Get(prefixKey(reqQuery.Data))
+		if err != nil {
+			panic(err)
+		}
+		if value == nil {
+			resQuery.Log = "does not exist"
+		} else {
+			resQuery.Log = "exists"
+		}
 		resQuery.Index = -1 // TODO make Proof return index
 		resQuery.Key = reqQuery.Data
 		resQuery.Value = value
-		if value != nil {
-			resQuery.Log = "exists"
-		} else {
-			resQuery.Log = "does not exist"
-		}
-		return
-	} else {
-		resQuery.Key = reqQuery.Data
-		value := app.state.db.Get(prefixKey(reqQuery.Data))
-		resQuery.Value = value
-		if value != nil {
-			resQuery.Log = "exists"
-		} else {
-			resQuery.Log = "does not exist"
-		}
+		resQuery.Height = app.state.Height
+
 		return
 	}
+
+	resQuery.Key = reqQuery.Data
+	value, err := app.state.db.Get(prefixKey(reqQuery.Data))
+	if err != nil {
+		panic(err)
+	}
+	if value == nil {
+		resQuery.Log = "does not exist"
+	} else {
+		resQuery.Log = "exists"
+	}
+	resQuery.Value = value
+	resQuery.Height = app.state.Height
+
+	return resQuery
 }

abci/example/kvstore/kvstore_test.go

@@ -1,7 +1,6 @@
 package kvstore
 
 import (
-	"bytes"
 	"fmt"
 	"io/ioutil"
 	"sort"
@@ -9,21 +8,33 @@ import (
 
 	"github.com/stretchr/testify/require"
 
-	cmn "github.com/tendermint/tendermint/libs/common"
 	"github.com/tendermint/tendermint/libs/log"
+	"github.com/tendermint/tendermint/libs/service"
 
 	abcicli "github.com/tendermint/tendermint/abci/client"
 	"github.com/tendermint/tendermint/abci/example/code"
 	abciserver "github.com/tendermint/tendermint/abci/server"
 	"github.com/tendermint/tendermint/abci/types"
+	tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
+)
+
+const (
+	testKey   = "abc"
+	testValue = "def"
 )
 
 func testKVStore(t *testing.T, app types.Application, tx []byte, key, value string) {
-	ar := app.DeliverTx(tx)
+	req := types.RequestDeliverTx{Tx: tx}
+	ar := app.DeliverTx(req)
 	require.False(t, ar.IsErr(), ar)
 	// repeating tx doesn't raise error
-	ar = app.DeliverTx(tx)
+	ar = app.DeliverTx(req)
 	require.False(t, ar.IsErr(), ar)
+	// commit
+	app.Commit()
+
+	info := app.Info(types.RequestInfo{})
+	require.NotZero(t, info.LastBlockHeight)
 
 	// make sure query is fine
 	resQuery := app.Query(types.RequestQuery{
@@ -31,7 +42,9 @@ func testKVStore(t *testing.T, app types.Application, tx []byte, key, value stri
 		Data: []byte(key),
 	})
 	require.Equal(t, code.CodeTypeOK, resQuery.Code)
+	require.Equal(t, key, string(resQuery.Key))
 	require.Equal(t, value, string(resQuery.Value))
+	require.EqualValues(t, info.LastBlockHeight, resQuery.Height)
 
 	// make sure proof is fine
 	resQuery = app.Query(types.RequestQuery{
@@ -40,17 +53,19 @@ func testKVStore(t *testing.T, app types.Application, tx []byte, key, value stri
 		Prove: true,
 	})
 	require.EqualValues(t, code.CodeTypeOK, resQuery.Code)
+	require.Equal(t, key, string(resQuery.Key))
 	require.Equal(t, value, string(resQuery.Value))
+	require.EqualValues(t, info.LastBlockHeight, resQuery.Height)
 }
 
 func TestKVStoreKV(t *testing.T) {
-	kvstore := NewKVStoreApplication()
-	key := "abc"
+	kvstore := NewApplication()
+	key := testKey
 	value := key
 	tx := []byte(key)
 	testKVStore(t, kvstore, tx, key, value)
 
-	value = "def"
+	value = testValue
 	tx = []byte(key + "=" + value)
 	testKVStore(t, kvstore, tx, key, value)
 }
@@ -61,12 +76,12 @@ func TestPersistentKVStoreKV(t *testing.T) {
 		t.Fatal(err)
 	}
 	kvstore := NewPersistentKVStoreApplication(dir)
-	key := "abc"
+	key := testKey
 	value := key
 	tx := []byte(key)
 	testKVStore(t, kvstore, tx, key, value)
 
-	value = "def"
+	value = testValue
 	tx = []byte(key + "=" + value)
 	testKVStore(t, kvstore, tx, key, value)
 }
@@ -88,8 +103,8 @@ func TestPersistentKVStoreInfo(t *testing.T) {
 	// make and apply block
 	height = int64(1)
 	hash := []byte("foo")
-	header := types.Header{
-		Height: int64(height),
+	header := tmproto.Header{
+		Height: height,
 	}
 	kvstore.BeginBlock(types.RequestBeginBlock{Hash: hash, Header: header})
 	kvstore.EndBlock(types.RequestEndBlock{Height: header.Height})
@@ -114,7 +129,7 @@ func TestValUpdates(t *testing.T) {
 	total := 10
 	nInit := 5
 	vals := RandVals(total)
-	// iniitalize with the first nInit
+	// initialize with the first nInit
 	kvstore.InitChain(types.RequestInitChain{
 		Validators: vals[:nInit],
 	})
@@ -147,7 +162,7 @@ func TestValUpdates(t *testing.T) {
 
 	makeApplyBlock(t, kvstore, 2, diff, tx1, tx2, tx3)
 
-	vals1 = append(vals[:nInit-2], vals[nInit+1])
+	vals1 = append(vals[:nInit-2], vals[nInit+1]) // nolint: gocritic
 	vals2 = kvstore.Validators()
 	valsEqual(t, vals1, vals2)
 
@@ -169,17 +184,22 @@ func TestValUpdates(t *testing.T) {
 
 }
 
-func makeApplyBlock(t *testing.T, kvstore types.Application, heightInt int, diff []types.ValidatorUpdate, txs ...[]byte) {
+func makeApplyBlock(
+	t *testing.T,
+	kvstore types.Application,
+	heightInt int,
+	diff []types.ValidatorUpdate,
+	txs ...[]byte) {
 	// make and apply block
 	height := int64(heightInt)
 	hash := []byte("foo")
-	header := types.Header{
+	header := tmproto.Header{
 		Height: height,
 	}
 
 	kvstore.BeginBlock(types.RequestBeginBlock{Hash: hash, Header: header})
 	for _, tx := range txs {
-		if r := kvstore.DeliverTx(tx); r.IsErr() {
+		if r := kvstore.DeliverTx(types.RequestDeliverTx{Tx: tx}); r.IsErr() {
 			t.Fatal(r)
 		}
 	}
@@ -199,14 +219,14 @@ func valsEqual(t *testing.T, vals1, vals2 []types.ValidatorUpdate) {
 	sort.Sort(types.ValidatorUpdates(vals2))
 	for i, v1 := range vals1 {
 		v2 := vals2[i]
-		if !bytes.Equal(v1.PubKey.Data, v2.PubKey.Data) ||
+		if !v1.PubKey.Equal(v2.PubKey) ||
 			v1.Power != v2.Power {
 			t.Fatalf("vals dont match at index %d. got %X/%d , expected %X/%d", i, v2.PubKey, v2.Power, v1.PubKey, v1.Power)
 		}
 	}
 }
 
-func makeSocketClientServer(app types.Application, name string) (abcicli.Client, cmn.Service, error) {
+func makeSocketClientServer(app types.Application, name string) (abcicli.Client, service.Service, error) {
 	// Start the listener
 	socket := fmt.Sprintf("unix://%s.sock", name)
 	logger := log.TestingLogger()
@@ -221,14 +241,16 @@ func makeSocketClientServer(app types.Application, name string) (abcicli.Client,
 	client := abcicli.NewSocketClient(socket, false)
 	client.SetLogger(logger.With("module", "abci-client"))
 	if err := client.Start(); err != nil {
-		server.Stop()
+		if err = server.Stop(); err != nil {
+			return nil, nil, err
+		}
 		return nil, nil, err
 	}
 
 	return client, server, nil
 }
 
-func makeGRPCClientServer(app types.Application, name string) (abcicli.Client, cmn.Service, error) {
+func makeGRPCClientServer(app types.Application, name string) (abcicli.Client, service.Service, error) {
 	// Start the listener
 	socket := fmt.Sprintf("unix://%s.sock", name)
 	logger := log.TestingLogger()
@@ -243,7 +265,9 @@ func makeGRPCClientServer(app types.Application, name string) (abcicli.Client, c
 	client := abcicli.NewGRPCClient(socket, true)
 	client.SetLogger(logger.With("module", "abci-client"))
 	if err := client.Start(); err != nil {
-		server.Stop()
+		if err := server.Stop(); err != nil {
+			return nil, nil, err
+		}
 		return nil, nil, err
 	}
 	return client, server, nil
@@ -251,44 +275,68 @@ func makeGRPCClientServer(app types.Application, name string) (abcicli.Client, c
 
 func TestClientServer(t *testing.T) {
 	// set up socket app
-	kvstore := NewKVStoreApplication()
+	kvstore := NewApplication()
 	client, server, err := makeSocketClientServer(kvstore, "kvstore-socket")
-	require.Nil(t, err)
-	defer server.Stop()
-	defer client.Stop()
+	require.NoError(t, err)
+	t.Cleanup(func() {
+		if err := server.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
+	t.Cleanup(func() {
+		if err := client.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
 
 	runClientTests(t, client)
 
 	// set up grpc app
-	kvstore = NewKVStoreApplication()
-	gclient, gserver, err := makeGRPCClientServer(kvstore, "kvstore-grpc")
-	require.Nil(t, err)
-	defer gserver.Stop()
-	defer gclient.Stop()
+	kvstore = NewApplication()
+	gclient, gserver, err := makeGRPCClientServer(kvstore, "/tmp/kvstore-grpc")
+	require.NoError(t, err)
+
+	t.Cleanup(func() {
+		if err := gserver.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
+	t.Cleanup(func() {
+		if err := gclient.Stop(); err != nil {
+			t.Error(err)
+		}
+	})
 
 	runClientTests(t, gclient)
 }
 
 func runClientTests(t *testing.T, client abcicli.Client) {
 	// run some tests....
-	key := "abc"
+	key := testKey
 	value := key
 	tx := []byte(key)
 	testClient(t, client, tx, key, value)
 
-	value = "def"
+	value = testValue
 	tx = []byte(key + "=" + value)
 	testClient(t, client, tx, key, value)
 }
 
 func testClient(t *testing.T, app abcicli.Client, tx []byte, key, value string) {
-	ar, err := app.DeliverTxSync(tx)
+	ar, err := app.DeliverTxSync(types.RequestDeliverTx{Tx: tx})
 	require.NoError(t, err)
 	require.False(t, ar.IsErr(), ar)
 	// repeating tx doesn't raise error
-	ar, err = app.DeliverTxSync(tx)
+	ar, err = app.DeliverTxSync(types.RequestDeliverTx{Tx: tx})
 	require.NoError(t, err)
 	require.False(t, ar.IsErr(), ar)
+	// commit
+	_, err = app.CommitSync()
+	require.NoError(t, err)
+
+	info, err := app.InfoSync(types.RequestInfo{})
+	require.NoError(t, err)
+	require.NotZero(t, info.LastBlockHeight)
 
 	// make sure query is fine
 	resQuery, err := app.QuerySync(types.RequestQuery{
@@ -297,7 +345,9 @@ func testClient(t *testing.T, app abcicli.Client, tx []byte, key, value string)
 	})
 	require.Nil(t, err)
 	require.Equal(t, code.CodeTypeOK, resQuery.Code)
+	require.Equal(t, key, string(resQuery.Key))
 	require.Equal(t, value, string(resQuery.Value))
+	require.EqualValues(t, info.LastBlockHeight, resQuery.Height)
 
 	// make sure proof is fine
 	resQuery, err = app.QuerySync(types.RequestQuery{
@@ -307,5 +357,7 @@ func testClient(t *testing.T, app abcicli.Client, tx []byte, key, value string)
 	})
 	require.Nil(t, err)
 	require.Equal(t, code.CodeTypeOK, resQuery.Code)
+	require.Equal(t, key, string(resQuery.Key))
 	require.Equal(t, value, string(resQuery.Value))
+	require.EqualValues(t, info.LastBlockHeight, resQuery.Height)
 }

abci/example/kvstore/persistent_kvstore.go

@@ -2,15 +2,18 @@ package kvstore
 
 import (
 	"bytes"
-	"encoding/hex"
+	"encoding/base64"
 	"fmt"
 	"strconv"
 	"strings"
 
+	dbm "github.com/tendermint/tm-db"
+
 	"github.com/tendermint/tendermint/abci/example/code"
 	"github.com/tendermint/tendermint/abci/types"
-	dbm "github.com/tendermint/tendermint/libs/db"
+	cryptoenc "github.com/tendermint/tendermint/crypto/encoding"
 	"github.com/tendermint/tendermint/libs/log"
+	pc "github.com/tendermint/tendermint/proto/tendermint/crypto"
 )
 
 const (
@@ -22,11 +25,13 @@ const (
 var _ types.Application = (*PersistentKVStoreApplication)(nil)
 
 type PersistentKVStoreApplication struct {
-	app *KVStoreApplication
+	app *Application
 
 	// validator set
 	ValUpdates []types.ValidatorUpdate
 
+	valAddrToPubKeyMap map[string]pc.PublicKey
+
 	logger log.Logger
 }
 
@@ -40,8 +45,9 @@ func NewPersistentKVStoreApplication(dbDir string) *PersistentKVStoreApplication
 	state := loadState(db)
 
 	return &PersistentKVStoreApplication{
-		app:    &KVStoreApplication{state: state},
-		logger: log.NewNopLogger(),
+		app:                &Application{state: state},
+		valAddrToPubKeyMap: make(map[string]pc.PublicKey),
+		logger:             log.NewNopLogger(),
 	}
 }
 
@@ -60,22 +66,22 @@ func (app *PersistentKVStoreApplication) SetOption(req types.RequestSetOption) t
 	return app.app.SetOption(req)
 }
 
-// tx is either "val:pubkey/power" or "key=value" or just arbitrary bytes
-func (app *PersistentKVStoreApplication) DeliverTx(tx []byte) types.ResponseDeliverTx {
+// tx is either "val:pubkey!power" or "key=value" or just arbitrary bytes
+func (app *PersistentKVStoreApplication) DeliverTx(req types.RequestDeliverTx) types.ResponseDeliverTx {
 	// if it starts with "val:", update the validator set
-	// format is "val:pubkey/power"
-	if isValidatorTx(tx) {
+	// format is "val:pubkey!power"
+	if isValidatorTx(req.Tx) {
 		// update validators in the merkle tree
 		// and in app.ValUpdates
-		return app.execValidatorTx(tx)
+		return app.execValidatorTx(req.Tx)
 	}
 
 	// otherwise, update the key-value store
-	return app.app.DeliverTx(tx)
+	return app.app.DeliverTx(req)
 }
 
-func (app *PersistentKVStoreApplication) CheckTx(tx []byte) types.ResponseCheckTx {
-	return app.app.CheckTx(tx)
+func (app *PersistentKVStoreApplication) CheckTx(req types.RequestCheckTx) types.ResponseCheckTx {
+	return app.app.CheckTx(req)
 }
 
 // Commit will panic if InitChain was not called
@@ -83,8 +89,23 @@ func (app *PersistentKVStoreApplication) Commit() types.ResponseCommit {
 	return app.app.Commit()
 }
 
-func (app *PersistentKVStoreApplication) Query(reqQuery types.RequestQuery) types.ResponseQuery {
-	return app.app.Query(reqQuery)
+// When path=/val and data={validator address}, returns the validator update (types.ValidatorUpdate) varint encoded.
+// For any other path, returns an associated value or nil if missing.
+func (app *PersistentKVStoreApplication) Query(reqQuery types.RequestQuery) (resQuery types.ResponseQuery) {
+	switch reqQuery.Path {
+	case "/val":
+		key := []byte("val:" + string(reqQuery.Data))
+		value, err := app.app.state.db.Get(key)
+		if err != nil {
+			panic(err)
+		}
+
+		resQuery.Key = reqQuery.Data
+		resQuery.Value = value
+		return
+	default:
+		return app.app.Query(reqQuery)
+	}
 }
 
 // Save the validators in the merkle tree
@@ -102,6 +123,25 @@ func (app *PersistentKVStoreApplication) InitChain(req types.RequestInitChain) t
 func (app *PersistentKVStoreApplication) BeginBlock(req types.RequestBeginBlock) types.ResponseBeginBlock {
 	// reset valset changes
 	app.ValUpdates = make([]types.ValidatorUpdate, 0)
+
+	// Punish validators who committed equivocation.
+	for _, ev := range req.ByzantineValidators {
+		if ev.Type == types.EvidenceType_DUPLICATE_VOTE {
+			addr := string(ev.Validator.Address)
+			if pubKey, ok := app.valAddrToPubKeyMap[addr]; ok {
+				app.updateValidator(types.ValidatorUpdate{
+					PubKey: pubKey,
+					Power:  ev.Validator.Power - 1,
+				})
+				app.logger.Info("Decreased val power by 1 because of the equivocation",
+					"val", addr)
+			} else {
+				app.logger.Error("Wanted to punish val, but can't find it",
+					"val", addr)
+			}
+		}
+	}
+
 	return types.ResponseBeginBlock{}
 }
 
@@ -110,11 +150,34 @@ func (app *PersistentKVStoreApplication) EndBlock(req types.RequestEndBlock) typ
 	return types.ResponseEndBlock{ValidatorUpdates: app.ValUpdates}
 }
 
+func (app *PersistentKVStoreApplication) ListSnapshots(
+	req types.RequestListSnapshots) types.ResponseListSnapshots {
+	return types.ResponseListSnapshots{}
+}
+
+func (app *PersistentKVStoreApplication) LoadSnapshotChunk(
+	req types.RequestLoadSnapshotChunk) types.ResponseLoadSnapshotChunk {
+	return types.ResponseLoadSnapshotChunk{}
+}
+
+func (app *PersistentKVStoreApplication) OfferSnapshot(
+	req types.RequestOfferSnapshot) types.ResponseOfferSnapshot {
+	return types.ResponseOfferSnapshot{Result: types.ResponseOfferSnapshot_ABORT}
+}
+
+func (app *PersistentKVStoreApplication) ApplySnapshotChunk(
+	req types.RequestApplySnapshotChunk) types.ResponseApplySnapshotChunk {
+	return types.ResponseApplySnapshotChunk{Result: types.ResponseApplySnapshotChunk_ABORT}
+}
+
 //---------------------------------------------
 // update validators
 
 func (app *PersistentKVStoreApplication) Validators() (validators []types.ValidatorUpdate) {
-	itr := app.app.state.db.Iterator(nil, nil)
+	itr, err := app.app.state.db.Iterator(nil, nil)
+	if err != nil {
+		panic(err)
+	}
 	for ; itr.Valid(); itr.Next() {
 		if isValidatorTx(itr.Key()) {
 			validator := new(types.ValidatorUpdate)
@@ -125,37 +188,45 @@ func (app *PersistentKVStoreApplication) Validators() (validators []types.Valida
 			validators = append(validators, *validator)
 		}
 	}
+	if err = itr.Error(); err != nil {
+		panic(err)
+	}
 	return
 }
 
-func MakeValSetChangeTx(pubkey types.PubKey, power int64) []byte {
-	return []byte(fmt.Sprintf("val:%X/%d", pubkey.Data, power))
+func MakeValSetChangeTx(pubkey pc.PublicKey, power int64) []byte {
+	pk, err := cryptoenc.PubKeyFromProto(pubkey)
+	if err != nil {
+		panic(err)
+	}
+	pubStr := base64.StdEncoding.EncodeToString(pk.Bytes())
+	return []byte(fmt.Sprintf("val:%s!%d", pubStr, power))
 }
 
 func isValidatorTx(tx []byte) bool {
 	return strings.HasPrefix(string(tx), ValidatorSetChangePrefix)
 }
 
-// format is "val:pubkey/power"
-// pubkey is raw 32-byte ed25519 key
+// format is "val:pubkey!power"
+// pubkey is a base64-encoded 32-byte ed25519 key
 func (app *PersistentKVStoreApplication) execValidatorTx(tx []byte) types.ResponseDeliverTx {
 	tx = tx[len(ValidatorSetChangePrefix):]
 
-	//get the pubkey and power
-	pubKeyAndPower := strings.Split(string(tx), "/")
+	//  get the pubkey and power
+	pubKeyAndPower := strings.Split(string(tx), "!")
 	if len(pubKeyAndPower) != 2 {
 		return types.ResponseDeliverTx{
 			Code: code.CodeTypeEncodingError,
-			Log:  fmt.Sprintf("Expected 'pubkey/power'. Got %v", pubKeyAndPower)}
+			Log:  fmt.Sprintf("Expected 'pubkey!power'. Got %v", pubKeyAndPower)}
 	}
 	pubkeyS, powerS := pubKeyAndPower[0], pubKeyAndPower[1]
 
 	// decode the pubkey
-	pubkey, err := hex.DecodeString(pubkeyS)
+	pubkey, err := base64.StdEncoding.DecodeString(pubkeyS)
 	if err != nil {
 		return types.ResponseDeliverTx{
 			Code: code.CodeTypeEncodingError,
-			Log:  fmt.Sprintf("Pubkey (%s) is invalid hex", pubkeyS)}
+			Log:  fmt.Sprintf("Pubkey (%s) is invalid base64", pubkeyS)}
 	}
 
 	// decode the power
@@ -167,20 +238,33 @@ func (app *PersistentKVStoreApplication) execValidatorTx(tx []byte) types.Respon
 	}
 
 	// update
-	return app.updateValidator(types.Ed25519ValidatorUpdate(pubkey, int64(power)))
+	return app.updateValidator(types.UpdateValidator(pubkey, power, ""))
 }
 
 // add, update, or remove a validator
 func (app *PersistentKVStoreApplication) updateValidator(v types.ValidatorUpdate) types.ResponseDeliverTx {
-	key := []byte("val:" + string(v.PubKey.Data))
+	pubkey, err := cryptoenc.PubKeyFromProto(v.PubKey)
+	if err != nil {
+		panic(fmt.Errorf("can't decode public key: %w", err))
+	}
+	key := []byte("val:" + string(pubkey.Bytes()))
+
 	if v.Power == 0 {
 		// remove validator
-		if !app.app.state.db.Has(key) {
+		hasKey, err := app.app.state.db.Has(key)
+		if err != nil {
+			panic(err)
+		}
+		if !hasKey {
+			pubStr := base64.StdEncoding.EncodeToString(pubkey.Bytes())
 			return types.ResponseDeliverTx{
 				Code: code.CodeTypeUnauthorized,
-				Log:  fmt.Sprintf("Cannot remove non-existent validator %X", key)}
+				Log:  fmt.Sprintf("Cannot remove non-existent validator %s", pubStr)}
 		}
-		app.app.state.db.Delete(key)
+		if err = app.app.state.db.Delete(key); err != nil {
+			panic(err)
+		}
+		delete(app.valAddrToPubKeyMap, string(pubkey.Address()))
 	} else {
 		// add or update validator
 		value := bytes.NewBuffer(make([]byte, 0))
@@ -189,7 +273,10 @@ func (app *PersistentKVStoreApplication) updateValidator(v types.ValidatorUpdate
 				Code: code.CodeTypeEncodingError,
 				Log:  fmt.Sprintf("Error encoding validator: %v", err)}
 		}
-		app.app.state.db.Set(key, value.Bytes())
+		if err = app.app.state.db.Set(key, value.Bytes()); err != nil {
+			panic(err)
+		}
+		app.valAddrToPubKeyMap[string(pubkey.Address())] = v.PubKey
 	}
 
 	// we only update the changes array if we successfully updated the tree

abci/example/python/abci/msg.py

@@ -1,50 +0,0 @@
-from wire import decode_string
-
-# map type_byte to message name
-message_types = {
-    0x01: "echo",
-    0x02: "flush",
-    0x03: "info",
-    0x04: "set_option",
-    0x21: "deliver_tx",
-    0x22: "check_tx",
-    0x23: "commit",
-    0x24: "add_listener",
-    0x25: "rm_listener",
-}
-
-# return the decoded arguments of abci messages
-
-class RequestDecoder():
-
-    def __init__(self, reader):
-        self.reader = reader
-
-    def echo(self):
-        return decode_string(self.reader)
-
-    def flush(self):
-        return
-
-    def info(self):
-        return
-
-    def set_option(self):
-        return decode_string(self.reader), decode_string(self.reader)
-
-    def deliver_tx(self):
-        return decode_string(self.reader)
-
-    def check_tx(self):
-        return decode_string(self.reader)
-
-    def commit(self):
-        return
-
-    def add_listener(self):
-        # TODO
-        return
-
-    def rm_listener(self):
-        # TODO
-        return

abci/example/python/abci/reader.py

@@ -1,56 +0,0 @@
-
-# Simple read() method around a bytearray
-
-
-class BytesBuffer():
-
-    def __init__(self, b):
-        self.buf = b
-        self.readCount = 0
-
-    def count(self):
-        return self.readCount
-
-    def reset_count(self):
-        self.readCount = 0
-
-    def size(self):
-        return len(self.buf)
-
-    def peek(self):
-        return self.buf[0]
-
-    def write(self, b):
-        # b should be castable to byte array
-        self.buf += bytearray(b)
-
-    def read(self, n):
-        if len(self.buf) < n:
-            print "reader err: buf less than n"
-            # TODO: exception
-            return
-        self.readCount += n
-        r = self.buf[:n]
-        self.buf = self.buf[n:]
-        return r
-
-# Buffer bytes off a tcp connection and read them off in chunks
-
-
-class ConnReader():
-
-    def __init__(self, conn):
-        self.conn = conn
-        self.buf = bytearray()
-
-    # blocking
-    def read(self, n):
-        while n > len(self.buf):
-            moreBuf = self.conn.recv(1024)
-            if not moreBuf:
-                raise IOError("dead connection")
-            self.buf = self.buf + bytearray(moreBuf)
-
-        r = self.buf[:n]
-        self.buf = self.buf[n:]
-        return r

abci/example/python/abci/server.py

@@ -1,202 +0,0 @@
-import socket
-import select
-import sys
-
-from wire import decode_varint, encode
-from reader import BytesBuffer
-from msg import RequestDecoder, message_types
-
-# hold the asyncronous state of a connection
-# ie. we may not get enough bytes on one read to decode the message
-
-class Connection():
-
-    def __init__(self, fd, app):
-        self.fd = fd
-        self.app = app
-        self.recBuf = BytesBuffer(bytearray())
-        self.resBuf = BytesBuffer(bytearray())
-        self.msgLength = 0
-        self.decoder = RequestDecoder(self.recBuf)
-        self.inProgress = False  # are we in the middle of a message
-
-    def recv(this):
-        data = this.fd.recv(1024)
-        if not data:  # what about len(data) == 0
-            raise IOError("dead connection")
-        this.recBuf.write(data)
-
-# ABCI server responds to messges by calling methods on the app
-
-class ABCIServer():
-
-    def __init__(self, app, port=5410):
-        self.app = app
-        # map conn file descriptors to (app, reqBuf, resBuf, msgDecoder)
-        self.appMap = {}
-
-        self.port = port
-        self.listen_backlog = 10
-
-        self.listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        self.listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        self.listener.setblocking(0)
-        self.listener.bind(('', port))
-
-        self.listener.listen(self.listen_backlog)
-
-        self.shutdown = False
-
-        self.read_list = [self.listener]
-        self.write_list = []
-
-    def handle_new_connection(self, r):
-        new_fd, new_addr = r.accept()
-        new_fd.setblocking(0)  # non-blocking
-        self.read_list.append(new_fd)
-        self.write_list.append(new_fd)
-        print 'new connection to', new_addr
-
-        self.appMap[new_fd] = Connection(new_fd, self.app)
-
-    def handle_conn_closed(self, r):
-        self.read_list.remove(r)
-        self.write_list.remove(r)
-        r.close()
-        print "connection closed"
-
-    def handle_recv(self, r):
-        #  app, recBuf, resBuf, conn
-        conn = self.appMap[r]
-        while True:
-            try:
-                print "recv loop"
-                # check if we need more data first
-                if conn.inProgress:
-                    if (conn.msgLength == 0 or conn.recBuf.size() < conn.msgLength):
-                        conn.recv()
-                else:
-                    if conn.recBuf.size() == 0:
-                        conn.recv()
-
-                conn.inProgress = True
-
-                # see if we have enough to get the message length
-                if conn.msgLength == 0:
-                    ll = conn.recBuf.peek()
-                    if conn.recBuf.size() < 1 + ll:
-                        # we don't have enough bytes to read the length yet
-                        return
-                    print "decoding msg length"
-                    conn.msgLength = decode_varint(conn.recBuf)
-
-                # see if we have enough to decode the message
-                if conn.recBuf.size() < conn.msgLength:
-                    return
-
-                # now we can decode the message
-
-                # first read the request type and get the particular msg
-                # decoder
-                typeByte = conn.recBuf.read(1)
-                typeByte = int(typeByte[0])
-                resTypeByte = typeByte + 0x10
-                req_type = message_types[typeByte]
-
-                if req_type == "flush":
-                    # messages are length prefixed
-                    conn.resBuf.write(encode(1))
-                    conn.resBuf.write([resTypeByte])
-                    conn.fd.send(str(conn.resBuf.buf))
-                    conn.msgLength = 0
-                    conn.inProgress = False
-                    conn.resBuf = BytesBuffer(bytearray())
-                    return
-
-                decoder = getattr(conn.decoder, req_type)
-
-                print "decoding args"
-                req_args = decoder()
-                print "got args", req_args
-
-                # done decoding message
-                conn.msgLength = 0
-                conn.inProgress = False
-
-                req_f = getattr(conn.app, req_type)
-                if req_args is None:
-                    res = req_f()
-                elif isinstance(req_args, tuple):
-                    res = req_f(*req_args)
-                else:
-                    res = req_f(req_args)
-
-                if isinstance(res, tuple):
-                    res, ret_code = res
-                else:
-                    ret_code = res
-                    res = None
-
-                print "called", req_type, "ret code:", ret_code
-                if ret_code != 0:
-                    print "non-zero retcode:", ret_code
-
-                if req_type in ("echo", "info"):  # these dont return a ret code
-                    enc = encode(res)
-                    # messages are length prefixed
-                    conn.resBuf.write(encode(len(enc) + 1))
-                    conn.resBuf.write([resTypeByte])
-                    conn.resBuf.write(enc)
-                else:
-                    enc, encRet = encode(res), encode(ret_code)
-                    # messages are length prefixed
-                    conn.resBuf.write(encode(len(enc) + len(encRet) + 1))
-                    conn.resBuf.write([resTypeByte])
-                    conn.resBuf.write(encRet)
-                    conn.resBuf.write(enc)
-            except TypeError as e:
-                print "TypeError on reading from connection:", e
-                self.handle_conn_closed(r)
-                return
-            except ValueError as e:
-                print "ValueError on reading from connection:", e
-                self.handle_conn_closed(r)
-                return
-            except IOError as e:
-                print "IOError on reading from connection:", e
-                self.handle_conn_closed(r)
-                return
-            except Exception as e:
-                # sys.exc_info()[0] # TODO better
-                print "error reading from connection", str(e)
-                self.handle_conn_closed(r)
-                return
-
-    def main_loop(self):
-        while not self.shutdown:
-            r_list, w_list, _ = select.select(
-                self.read_list, self.write_list, [], 2.5)
-
-            for r in r_list:
-                if (r == self.listener):
-                    try:
-                        self.handle_new_connection(r)
-                        # undo adding to read list ...
-                    except NameError as e:
-                        print "Could not connect due to NameError:", e
-                    except TypeError as e:
-                        print "Could not connect due to TypeError:", e
-                    except:
-                        print "Could not connect due to unexpected error:", sys.exc_info()[0]
-                else:
-                    self.handle_recv(r)
-
-    def handle_shutdown(self):
-        for r in self.read_list:
-            r.close()
-        for w in self.write_list:
-            try:
-                w.close()
-            except Exception as e:
-                print(e)  # TODO: add logging
-        self.shutdown = True

abci/example/python/abci/wire.py

@@ -1,115 +0,0 @@
-
-# the decoder works off a reader
-# the encoder returns bytearray
-
-
-def hex2bytes(h):
-    return bytearray(h.decode('hex'))
-
-
-def bytes2hex(b):
-    if type(b) in (str, unicode):
-        return "".join([hex(ord(c))[2:].zfill(2) for c in b])
-    else:
-        return bytes2hex(b.decode())
-
-
-# expects uvarint64 (no crazy big nums!)
-def uvarint_size(i):
-    if i == 0:
-        return 0
-    for j in xrange(1, 8):
-        if i < 1 << j * 8:
-            return j
-    return 8
-
-# expects i < 2**size
-
-
-def encode_big_endian(i, size):
-    if size == 0:
-        return bytearray()
-    return encode_big_endian(i / 256, size - 1) + bytearray([i % 256])
-
-
-def decode_big_endian(reader, size):
-    if size == 0:
-        return 0
-    firstByte = reader.read(1)[0]
-    return firstByte * (256 ** (size - 1)) + decode_big_endian(reader, size - 1)
-
-# ints are max 16 bytes long
-
-
-def encode_varint(i):
-    negate = False
-    if i < 0:
-        negate = True
-        i = -i
-    size = uvarint_size(i)
-    if size == 0:
-        return bytearray([0])
-    big_end = encode_big_endian(i, size)
-    if negate:
-        size += 0xF0
-    return bytearray([size]) + big_end
-
-# returns the int and whats left of the byte array
-
-
-def decode_varint(reader):
-    size = reader.read(1)[0]
-    if size == 0:
-        return 0
-
-    negate = True if size > int(0xF0) else False
-    if negate:
-        size = size - 0xF0
-    i = decode_big_endian(reader, size)
-    if negate:
-        i = i * (-1)
-    return i
-
-
-def encode_string(s):
-    size = encode_varint(len(s))
-    return size + bytearray(s)
-
-
-def decode_string(reader):
-    length = decode_varint(reader)
-    return str(reader.read(length))
-
-
-def encode_list(s):
-    b = bytearray()
-    map(b.extend, map(encode, s))
-    return encode_varint(len(s)) + b
-
-
-def encode(s):
-    if s is None:
-        return bytearray()
-    if isinstance(s, int):
-        return encode_varint(s)
-    elif isinstance(s, str):
-        return encode_string(s)
-    elif isinstance(s, list):
-        return encode_list(s)
-    else:
-        print "UNSUPPORTED TYPE!", type(s), s
-
-
-if __name__ == '__main__':
-    ns = [100, 100, 1000, 256]
-    ss = [2, 5, 5, 2]
-    bs = map(encode_big_endian, ns, ss)
-    ds = map(decode_big_endian, bs, ss)
-    print ns
-    print [i[0] for i in ds]
-
-    ss = ["abc", "hi there jim", "ok now what"]
-    e = map(encode_string, ss)
-    d = map(decode_string, e)
-    print ss
-    print [i[0] for i in d]

abci/example/python/app.py

@@ -1,82 +0,0 @@
-import sys
-
-from abci.wire import hex2bytes, decode_big_endian, encode_big_endian
-from abci.server import ABCIServer
-from abci.reader import BytesBuffer
-
-
-class CounterApplication():
-
-    def __init__(self):
-        sys.exit("The python example is out of date.  Upgrading the Python examples is currently left as an exercise to you.")
-        self.hashCount = 0
-        self.txCount = 0
-        self.serial = False
-
-    def echo(self, msg):
-        return msg, 0
-
-    def info(self):
-        return ["hashes:%d, txs:%d" % (self.hashCount, self.txCount)], 0
-
-    def set_option(self, key, value):
-        if key == "serial" and value == "on":
-            self.serial = True
-        return 0
-
-    def deliver_tx(self, txBytes):
-        if self.serial:
-            txByteArray = bytearray(txBytes)
-            if len(txBytes) >= 2 and txBytes[:2] == "0x":
-                txByteArray = hex2bytes(txBytes[2:])
-            txValue = decode_big_endian(
-                BytesBuffer(txByteArray), len(txBytes))
-            if txValue != self.txCount:
-                return None, 6
-        self.txCount += 1
-        return None, 0
-
-    def check_tx(self, txBytes):
-        if self.serial:
-            txByteArray = bytearray(txBytes)
-            if len(txBytes) >= 2 and txBytes[:2] == "0x":
-                txByteArray = hex2bytes(txBytes[2:])
-            txValue = decode_big_endian(
-                BytesBuffer(txByteArray), len(txBytes))
-            if txValue < self.txCount:
-                return 6
-        return 0
-
-    def commit(self):
-        self.hashCount += 1
-        if self.txCount == 0:
-            return "", 0
-        h = encode_big_endian(self.txCount, 8)
-        h.reverse()
-        return str(h), 0
-
-    def add_listener(self):
-        return 0
-
-    def rm_listener(self):
-        return 0
-
-    def event(self):
-        return
-
-
-if __name__ == '__main__':
-    l = len(sys.argv)
-    if l == 1:
-        port = 26658
-    elif l == 2:
-        port = int(sys.argv[1])
-    else:
-        print "too many arguments"
-        quit()
-
-    print 'ABCI Demo APP (Python)'
-
-    app = CounterApplication()
-    server = ABCIServer(app, port)
-    server.main_loop()

abci/example/python3/abci/msg.py

@@ -1,50 +0,0 @@
-from .wire import decode_string
-
-# map type_byte to message name
-message_types = {
-    0x01: "echo",
-    0x02: "flush",
-    0x03: "info",
-    0x04: "set_option",
-    0x21: "deliver_tx",
-    0x22: "check_tx",
-    0x23: "commit",
-    0x24: "add_listener",
-    0x25: "rm_listener",
-}
-
-# return the decoded arguments of abci messages
-
-class RequestDecoder():
-
-    def __init__(self, reader):
-        self.reader = reader
-
-    def echo(self):
-        return decode_string(self.reader)
-
-    def flush(self):
-        return
-
-    def info(self):
-        return
-
-    def set_option(self):
-        return decode_string(self.reader), decode_string(self.reader)
-
-    def deliver_tx(self):
-        return decode_string(self.reader)
-
-    def check_tx(self):
-        return decode_string(self.reader)
-
-    def commit(self):
-        return
-
-    def add_listener(self):
-        # TODO
-        return
-
-    def rm_listener(self):
-        # TODO
-        return

abci/example/python3/abci/reader.py

@@ -1,56 +0,0 @@
-
-# Simple read() method around a bytearray
-
-
-class BytesBuffer():
-
-    def __init__(self, b):
-        self.buf = b
-        self.readCount = 0
-
-    def count(self):
-        return self.readCount
-
-    def reset_count(self):
-        self.readCount = 0
-
-    def size(self):
-        return len(self.buf)
-
-    def peek(self):
-        return self.buf[0]
-
-    def write(self, b):
-        # b should be castable to byte array
-        self.buf += bytearray(b)
-
-    def read(self, n):
-        if len(self.buf) < n:
-            print("reader err: buf less than n")
-            # TODO: exception
-            return
-        self.readCount += n
-        r = self.buf[:n]
-        self.buf = self.buf[n:]
-        return r
-
-# Buffer bytes off a tcp connection and read them off in chunks
-
-
-class ConnReader():
-
-    def __init__(self, conn):
-        self.conn = conn
-        self.buf = bytearray()
-
-    # blocking
-    def read(self, n):
-        while n > len(self.buf):
-            moreBuf = self.conn.recv(1024)
-            if not moreBuf:
-                raise IOError("dead connection")
-            self.buf = self.buf + bytearray(moreBuf)
-
-        r = self.buf[:n]
-        self.buf = self.buf[n:]
-        return r

abci/example/python3/abci/server.py

@@ -1,196 +0,0 @@
-import socket
-import select
-import sys
-import logging
-
-from .wire import decode_varint, encode
-from .reader import BytesBuffer
-from .msg import RequestDecoder, message_types
-
-# hold the asyncronous state of a connection
-# ie. we may not get enough bytes on one read to decode the message
-
-logger = logging.getLogger(__name__)
-
-class Connection():
-
-    def __init__(self, fd, app):
-        self.fd = fd
-        self.app = app
-        self.recBuf = BytesBuffer(bytearray())
-        self.resBuf = BytesBuffer(bytearray())
-        self.msgLength = 0
-        self.decoder = RequestDecoder(self.recBuf)
-        self.inProgress = False  # are we in the middle of a message
-
-    def recv(this):
-        data = this.fd.recv(1024)
-        if not data:  # what about len(data) == 0
-            raise IOError("dead connection")
-        this.recBuf.write(data)
-
-# ABCI server responds to messges by calling methods on the app
-
-class ABCIServer():
-
-    def __init__(self, app, port=5410):
-        self.app = app
-        # map conn file descriptors to (app, reqBuf, resBuf, msgDecoder)
-        self.appMap = {}
-
-        self.port = port
-        self.listen_backlog = 10
-
-        self.listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-        self.listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        self.listener.setblocking(0)
-        self.listener.bind(('', port))
-
-        self.listener.listen(self.listen_backlog)
-
-        self.shutdown = False
-
-        self.read_list = [self.listener]
-        self.write_list = []
-
-    def handle_new_connection(self, r):
-        new_fd, new_addr = r.accept()
-        new_fd.setblocking(0)  # non-blocking
-        self.read_list.append(new_fd)
-        self.write_list.append(new_fd)
-        print('new connection to', new_addr)
-
-        self.appMap[new_fd] = Connection(new_fd, self.app)
-
-    def handle_conn_closed(self, r):
-        self.read_list.remove(r)
-        self.write_list.remove(r)
-        r.close()
-        print("connection closed")
-
-    def handle_recv(self, r):
-        #  app, recBuf, resBuf, conn
-        conn = self.appMap[r]
-        while True:
-            try:
-                print("recv loop")
-                # check if we need more data first
-                if conn.inProgress:
-                    if (conn.msgLength == 0 or conn.recBuf.size() < conn.msgLength):
-                        conn.recv()
-                else:
-                    if conn.recBuf.size() == 0:
-                        conn.recv()
-
-                conn.inProgress = True
-
-                # see if we have enough to get the message length
-                if conn.msgLength == 0:
-                    ll = conn.recBuf.peek()
-                    if conn.recBuf.size() < 1 + ll:
-                        # we don't have enough bytes to read the length yet
-                        return
-                    print("decoding msg length")
-                    conn.msgLength = decode_varint(conn.recBuf)
-
-                # see if we have enough to decode the message
-                if conn.recBuf.size() < conn.msgLength:
-                    return
-
-                # now we can decode the message
-
-                # first read the request type and get the particular msg
-                # decoder
-                typeByte = conn.recBuf.read(1)
-                typeByte = int(typeByte[0])
-                resTypeByte = typeByte + 0x10
-                req_type = message_types[typeByte]
-
-                if req_type == "flush":
-                    # messages are length prefixed
-                    conn.resBuf.write(encode(1))
-                    conn.resBuf.write([resTypeByte])
-                    conn.fd.send(conn.resBuf.buf)
-                    conn.msgLength = 0
-                    conn.inProgress = False
-                    conn.resBuf = BytesBuffer(bytearray())
-                    return
-
-                decoder = getattr(conn.decoder, req_type)
-
-                print("decoding args")
-                req_args = decoder()
-                print("got args", req_args)
-
-                # done decoding message
-                conn.msgLength = 0
-                conn.inProgress = False
-
-                req_f = getattr(conn.app, req_type)
-                if req_args is None:
-                    res = req_f()
-                elif isinstance(req_args, tuple):
-                    res = req_f(*req_args)
-                else:
-                    res = req_f(req_args)
-
-                if isinstance(res, tuple):
-                    res, ret_code = res
-                else:
-                    ret_code = res
-                    res = None
-
-                print("called", req_type, "ret code:", ret_code, 'res:', res)
-                if ret_code != 0:
-                    print("non-zero retcode:", ret_code)
-
-                if req_type in ("echo", "info"):  # these dont return a ret code
-                    enc = encode(res)
-                    # messages are length prefixed
-                    conn.resBuf.write(encode(len(enc) + 1))
-                    conn.resBuf.write([resTypeByte])
-                    conn.resBuf.write(enc)
-                else:
-                    enc, encRet = encode(res), encode(ret_code)
-                    # messages are length prefixed
-                    conn.resBuf.write(encode(len(enc) + len(encRet) + 1))
-                    conn.resBuf.write([resTypeByte])
-                    conn.resBuf.write(encRet)
-                    conn.resBuf.write(enc)
-            except IOError as e:
-                print("IOError on reading from connection:", e)
-                self.handle_conn_closed(r)
-                return
-            except Exception as e:
-                logger.exception("error reading from connection")
-                self.handle_conn_closed(r)
-                return
-
-    def main_loop(self):
-        while not self.shutdown:
-            r_list, w_list, _ = select.select(
-                self.read_list, self.write_list, [], 2.5)
-
-            for r in r_list:
-                if (r == self.listener):
-                    try:
-                        self.handle_new_connection(r)
-                        # undo adding to read list ...
-                    except NameError as e:
-                        print("Could not connect due to NameError:", e)
-                    except TypeError as e:
-                        print("Could not connect due to TypeError:", e)
-                    except:
-                        print("Could not connect due to unexpected error:", sys.exc_info()[0])
-                else:
-                    self.handle_recv(r)
-
-    def handle_shutdown(self):
-        for r in self.read_list:
-            r.close()
-        for w in self.write_list:
-            try:
-                w.close()
-            except Exception as e:
-                print(e)  # TODO: add logging
-        self.shutdown = True

abci/example/python3/abci/wire.py

@@ -1,119 +0,0 @@
-
-# the decoder works off a reader
-# the encoder returns bytearray
-
-
-def hex2bytes(h):
-    return bytearray(h.decode('hex'))
-
-
-def bytes2hex(b):
-    if type(b) in (str, str):
-        return "".join([hex(ord(c))[2:].zfill(2) for c in b])
-    else:
-        return bytes2hex(b.decode())
-
-
-# expects uvarint64 (no crazy big nums!)
-def uvarint_size(i):
-    if i == 0:
-        return 0
-    for j in range(1, 8):
-        if i < 1 << j * 8:
-            return j
-    return 8
-
-# expects i < 2**size
-
-
-def encode_big_endian(i, size):
-    if size == 0:
-        return bytearray()
-    return encode_big_endian(i // 256, size - 1) + bytearray([i % 256])
-
-
-def decode_big_endian(reader, size):
-    if size == 0:
-        return 0
-    firstByte = reader.read(1)[0]
-    return firstByte * (256 ** (size - 1)) + decode_big_endian(reader, size - 1)
-
-# ints are max 16 bytes long
-
-
-def encode_varint(i):
-    negate = False
-    if i < 0:
-        negate = True
-        i = -i
-    size = uvarint_size(i)
-    if size == 0:
-        return bytearray([0])
-    big_end = encode_big_endian(i, size)
-    if negate:
-        size += 0xF0
-    return bytearray([size]) + big_end
-
-# returns the int and whats left of the byte array
-
-
-def decode_varint(reader):
-    size = reader.read(1)[0]
-    if size == 0:
-        return 0
-
-    negate = True if size > int(0xF0) else False
-    if negate:
-        size = size - 0xF0
-    i = decode_big_endian(reader, size)
-    if negate:
-        i = i * (-1)
-    return i
-
-
-def encode_string(s):
-    size = encode_varint(len(s))
-    return size + bytearray(s, 'utf8')
-
-
-def decode_string(reader):
-    length = decode_varint(reader)
-    raw_data = reader.read(length)
-    return raw_data.decode()
-
-
-def encode_list(s):
-    b = bytearray()
-    list(map(b.extend, list(map(encode, s))))
-    return encode_varint(len(s)) + b
-
-
-def encode(s):
-    print('encoding', repr(s))
-    if s is None:
-        return bytearray()
-    if isinstance(s, int):
-        return encode_varint(s)
-    elif isinstance(s, str):
-        return encode_string(s)
-    elif isinstance(s, list):
-        return encode_list(s)
-    elif isinstance(s, bytearray):
-        return encode_string(s)
-    else:
-        print("UNSUPPORTED TYPE!", type(s), s)
-
-
-if __name__ == '__main__':
-    ns = [100, 100, 1000, 256]
-    ss = [2, 5, 5, 2]
-    bs = list(map(encode_big_endian, ns, ss))
-    ds = list(map(decode_big_endian, bs, ss))
-    print(ns)
-    print([i[0] for i in ds])
-
-    ss = ["abc", "hi there jim", "ok now what"]
-    e = list(map(encode_string, ss))
-    d = list(map(decode_string, e))
-    print(ss)
-    print([i[0] for i in d])

abci/example/python3/app.py

@@ -1,82 +0,0 @@
-import sys
-
-from abci.wire import hex2bytes, decode_big_endian, encode_big_endian
-from abci.server import ABCIServer
-from abci.reader import BytesBuffer
-
-
-class CounterApplication():
-
-    def __init__(self):
-        sys.exit("The python example is out of date.  Upgrading the Python examples is currently left as an exercise to you.")
-        self.hashCount = 0
-        self.txCount = 0
-        self.serial = False
-
-    def echo(self, msg):
-        return msg, 0
-
-    def info(self):
-        return ["hashes:%d, txs:%d" % (self.hashCount, self.txCount)], 0
-
-    def set_option(self, key, value):
-        if key == "serial" and value == "on":
-            self.serial = True
-        return 0
-
-    def deliver_tx(self, txBytes):
-        if self.serial:
-            txByteArray = bytearray(txBytes)
-            if len(txBytes) >= 2 and txBytes[:2] == "0x":
-                txByteArray = hex2bytes(txBytes[2:])
-            txValue = decode_big_endian(
-                BytesBuffer(txByteArray), len(txBytes))
-            if txValue != self.txCount:
-                return None, 6
-        self.txCount += 1
-        return None, 0
-
-    def check_tx(self, txBytes):
-        if self.serial:
-            txByteArray = bytearray(txBytes)
-            if len(txBytes) >= 2 and txBytes[:2] == "0x":
-                txByteArray = hex2bytes(txBytes[2:])
-            txValue = decode_big_endian(
-                BytesBuffer(txByteArray), len(txBytes))
-            if txValue < self.txCount:
-                return 6
-        return 0
-
-    def commit(self):
-        self.hashCount += 1
-        if self.txCount == 0:
-            return "", 0
-        h = encode_big_endian(self.txCount, 8)
-        h.reverse()
-        return h.decode(), 0
-
-    def add_listener(self):
-        return 0
-
-    def rm_listener(self):
-        return 0
-
-    def event(self):
-        return
-
-
-if __name__ == '__main__':
-    l = len(sys.argv)
-    if l == 1:
-        port = 26658
-    elif l == 2:
-        port = int(sys.argv[1])
-    else:
-        print("too many arguments")
-        quit()
-
-    print('ABCI Demo APP (Python)')
-
-    app = CounterApplication()
-    server = ABCIServer(app, port)
-    server.main_loop()

abci/server/grpc_server.go

@@ -6,11 +6,12 @@ import (
 	"google.golang.org/grpc"
 
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmnet "github.com/tendermint/tendermint/libs/net"
+	"github.com/tendermint/tendermint/libs/service"
 )
 
 type GRPCServer struct {
-	cmn.BaseService
+	service.BaseService
 
 	proto    string
 	addr     string
@@ -21,37 +22,40 @@ type GRPCServer struct {
 }
 
 // NewGRPCServer returns a new gRPC ABCI server
-func NewGRPCServer(protoAddr string, app types.ABCIApplicationServer) cmn.Service {
-	proto, addr := cmn.ProtocolAndAddress(protoAddr)
+func NewGRPCServer(protoAddr string, app types.ABCIApplicationServer) service.Service {
+	proto, addr := tmnet.ProtocolAndAddress(protoAddr)
 	s := &GRPCServer{
 		proto:    proto,
 		addr:     addr,
 		listener: nil,
 		app:      app,
 	}
-	s.BaseService = *cmn.NewBaseService(nil, "ABCIServer", s)
+	s.BaseService = *service.NewBaseService(nil, "ABCIServer", s)
 	return s
 }
 
-// OnStart starts the gRPC service
+// OnStart starts the gRPC service.
 func (s *GRPCServer) OnStart() error {
-	if err := s.BaseService.OnStart(); err != nil {
-		return err
-	}
+
 	ln, err := net.Listen(s.proto, s.addr)
 	if err != nil {
 		return err
 	}
-	s.Logger.Info("Listening", "proto", s.proto, "addr", s.addr)
+
 	s.listener = ln
 	s.server = grpc.NewServer()
 	types.RegisterABCIApplicationServer(s.server, s.app)
-	go s.server.Serve(s.listener)
+
+	s.Logger.Info("Listening", "proto", s.proto, "addr", s.addr)
+	go func() {
+		if err := s.server.Serve(s.listener); err != nil {
+			s.Logger.Error("Error serving gRPC server", "err", err)
+		}
+	}()
 	return nil
 }
 
-// OnStop stops the gRPC server
+// OnStop stops the gRPC server.
 func (s *GRPCServer) OnStop() {
-	s.BaseService.OnStop()
 	s.server.Stop()
 }

abci/server/server.go

@@ -6,18 +6,17 @@ It contains two server implementation:
  * socket server
 
 */
-
 package server
 
 import (
 	"fmt"
 
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	"github.com/tendermint/tendermint/libs/service"
 )
 
-func NewServer(protoAddr, transport string, app types.Application) (cmn.Service, error) {
-	var s cmn.Service
+func NewServer(protoAddr, transport string, app types.Application) (service.Service, error) {
+	var s service.Service
 	var err error
 	switch transport {
 	case "socket":
@@ -25,7 +24,7 @@ func NewServer(protoAddr, transport string, app types.Application) (cmn.Service,
 	case "grpc":
 		s = NewGRPCServer(protoAddr, types.NewGRPCApplication(app))
 	default:
-		err = fmt.Errorf("Unknown server type %s", transport)
+		err = fmt.Errorf("unknown server type %s", transport)
 	}
 	return s, err
 }

abci/server/socket_server.go

@@ -5,31 +5,36 @@ import (
 	"fmt"
 	"io"
 	"net"
-	"sync"
+	"os"
+	"runtime"
 
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmlog "github.com/tendermint/tendermint/libs/log"
+	tmnet "github.com/tendermint/tendermint/libs/net"
+	"github.com/tendermint/tendermint/libs/service"
+	tmsync "github.com/tendermint/tendermint/libs/sync"
 )
 
 // var maxNumberConnections = 2
 
 type SocketServer struct {
-	cmn.BaseService
+	service.BaseService
+	isLoggerSet bool
 
 	proto    string
 	addr     string
 	listener net.Listener
 
-	connsMtx   sync.Mutex
+	connsMtx   tmsync.Mutex
 	conns      map[int]net.Conn
 	nextConnID int
 
-	appMtx sync.Mutex
+	appMtx tmsync.Mutex
 	app    types.Application
 }
 
-func NewSocketServer(protoAddr string, app types.Application) cmn.Service {
-	proto, addr := cmn.ProtocolAndAddress(protoAddr)
+func NewSocketServer(protoAddr string, app types.Application) service.Service {
+	proto, addr := tmnet.ProtocolAndAddress(protoAddr)
 	s := &SocketServer{
 		proto:    proto,
 		addr:     addr,
@@ -37,25 +42,28 @@ func NewSocketServer(protoAddr string, app types.Application) cmn.Service {
 		app:      app,
 		conns:    make(map[int]net.Conn),
 	}
-	s.BaseService = *cmn.NewBaseService(nil, "ABCIServer", s)
+	s.BaseService = *service.NewBaseService(nil, "ABCIServer", s)
 	return s
 }
 
+func (s *SocketServer) SetLogger(l tmlog.Logger) {
+	s.BaseService.SetLogger(l)
+	s.isLoggerSet = true
+}
+
 func (s *SocketServer) OnStart() error {
-	if err := s.BaseService.OnStart(); err != nil {
-		return err
-	}
 	ln, err := net.Listen(s.proto, s.addr)
 	if err != nil {
 		return err
 	}
+
 	s.listener = ln
 	go s.acceptConnectionsRoutine()
+
 	return nil
 }
 
 func (s *SocketServer) OnStop() {
-	s.BaseService.OnStop()
 	if err := s.listener.Close(); err != nil {
 		s.Logger.Error("Error closing listener", "err", err)
 	}
@@ -88,7 +96,7 @@ func (s *SocketServer) rmConn(connID int) error {
 
 	conn, ok := s.conns[connID]
 	if !ok {
-		return fmt.Errorf("Connection %d does not exist", connID)
+		return fmt.Errorf("connection %d does not exist", connID)
 	}
 
 	delete(s.conns, connID)
@@ -104,7 +112,7 @@ func (s *SocketServer) acceptConnectionsRoutine() {
 			if !s.IsRunning() {
 				return // Ignore error from listener closing.
 			}
-			s.Logger.Error("Failed to accept connection: " + err.Error())
+			s.Logger.Error("Failed to accept connection", "err", err)
 			continue
 		}
 
@@ -127,25 +135,43 @@ func (s *SocketServer) acceptConnectionsRoutine() {
 
 func (s *SocketServer) waitForClose(closeConn chan error, connID int) {
 	err := <-closeConn
-	if err == io.EOF {
+	switch {
+	case err == io.EOF:
 		s.Logger.Error("Connection was closed by client")
-	} else if err != nil {
-		s.Logger.Error("Connection error", "error", err)
-	} else {
+	case err != nil:
+		s.Logger.Error("Connection error", "err", err)
+	default:
 		// never happens
-		s.Logger.Error("Connection was closed.")
+		s.Logger.Error("Connection was closed")
 	}
 
 	// Close the connection
 	if err := s.rmConn(connID); err != nil {
-		s.Logger.Error("Error in closing connection", "error", err)
+		s.Logger.Error("Error closing connection", "err", err)
 	}
 }
 
 // Read requests from conn and deal with them
-func (s *SocketServer) handleRequests(closeConn chan error, conn net.Conn, responses chan<- *types.Response) {
+func (s *SocketServer) handleRequests(closeConn chan error, conn io.Reader, responses chan<- *types.Response) {
 	var count int
 	var bufReader = bufio.NewReader(conn)
+
+	defer func() {
+		// make sure to recover from any app-related panics to allow proper socket cleanup
+		r := recover()
+		if r != nil {
+			const size = 64 << 10
+			buf := make([]byte, size)
+			buf = buf[:runtime.Stack(buf, false)]
+			err := fmt.Errorf("recovered from panic: %v\n%s", r, buf)
+			if !s.isLoggerSet {
+				fmt.Fprintln(os.Stderr, err)
+			}
+			closeConn <- err
+			s.appMtx.Unlock()
+		}
+	}()
+
 	for {
 
 		var req = &types.Request{}
@@ -154,7 +180,7 @@ func (s *SocketServer) handleRequests(closeConn chan error, conn net.Conn, respo
 			if err == io.EOF {
 				closeConn <- err
 			} else {
-				closeConn <- fmt.Errorf("Error reading message: %v", err.Error())
+				closeConn <- fmt.Errorf("error reading message: %w", err)
 			}
 			return
 		}
@@ -178,10 +204,10 @@ func (s *SocketServer) handleRequest(req *types.Request, responses chan<- *types
 		res := s.app.SetOption(*r.SetOption)
 		responses <- types.ToResponseSetOption(res)
 	case *types.Request_DeliverTx:
-		res := s.app.DeliverTx(r.DeliverTx.Tx)
+		res := s.app.DeliverTx(*r.DeliverTx)
 		responses <- types.ToResponseDeliverTx(res)
 	case *types.Request_CheckTx:
-		res := s.app.CheckTx(r.CheckTx.Tx)
+		res := s.app.CheckTx(*r.CheckTx)
 		responses <- types.ToResponseCheckTx(res)
 	case *types.Request_Commit:
 		res := s.app.Commit()
@@ -198,26 +224,38 @@ func (s *SocketServer) handleRequest(req *types.Request, responses chan<- *types
 	case *types.Request_EndBlock:
 		res := s.app.EndBlock(*r.EndBlock)
 		responses <- types.ToResponseEndBlock(res)
+	case *types.Request_ListSnapshots:
+		res := s.app.ListSnapshots(*r.ListSnapshots)
+		responses <- types.ToResponseListSnapshots(res)
+	case *types.Request_OfferSnapshot:
+		res := s.app.OfferSnapshot(*r.OfferSnapshot)
+		responses <- types.ToResponseOfferSnapshot(res)
+	case *types.Request_LoadSnapshotChunk:
+		res := s.app.LoadSnapshotChunk(*r.LoadSnapshotChunk)
+		responses <- types.ToResponseLoadSnapshotChunk(res)
+	case *types.Request_ApplySnapshotChunk:
+		res := s.app.ApplySnapshotChunk(*r.ApplySnapshotChunk)
+		responses <- types.ToResponseApplySnapshotChunk(res)
 	default:
 		responses <- types.ToResponseException("Unknown request")
 	}
 }
 
 // Pull responses from 'responses' and write them to conn.
-func (s *SocketServer) handleResponses(closeConn chan error, conn net.Conn, responses <-chan *types.Response) {
+func (s *SocketServer) handleResponses(closeConn chan error, conn io.Writer, responses <-chan *types.Response) {
 	var count int
 	var bufWriter = bufio.NewWriter(conn)
 	for {
 		var res = <-responses
 		err := types.WriteMessage(res, bufWriter)
 		if err != nil {
-			closeConn <- fmt.Errorf("Error writing message: %v", err.Error())
+			closeConn <- fmt.Errorf("error writing message: %w", err)
 			return
 		}
 		if _, ok := res.Value.(*types.Response_Flush); ok {
 			err = bufWriter.Flush()
 			if err != nil {
-				closeConn <- fmt.Errorf("Error flushing write buffer: %v", err.Error())
+				closeConn <- fmt.Errorf("error flushing write buffer: %w", err)
 				return
 			}
 		}

abci/tests/benchmarks/parallel/parallel.go

@@ -6,12 +6,12 @@ import (
 	"log"
 
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmnet "github.com/tendermint/tendermint/libs/net"
 )
 
 func main() {
 
-	conn, err := cmn.Connect("unix://test.sock")
+	conn, err := tmnet.Connect("unix://test.sock")
 	if err != nil {
 		log.Fatal(err.Error())
 	}

abci/tests/benchmarks/simple/simple.go

@@ -3,17 +3,17 @@ package main
 import (
 	"bufio"
 	"fmt"
+	"io"
 	"log"
-	"net"
 	"reflect"
 
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmnet "github.com/tendermint/tendermint/libs/net"
 )
 
 func main() {
 
-	conn, err := cmn.Connect("unix://test.sock")
+	conn, err := tmnet.Connect("unix://test.sock")
 	if err != nil {
 		log.Fatal(err.Error())
 	}
@@ -33,7 +33,7 @@ func main() {
 	}
 }
 
-func makeRequest(conn net.Conn, req *types.Request) (*types.Response, error) {
+func makeRequest(conn io.ReadWriter, req *types.Request) (*types.Response, error) {
 	var bufWriter = bufio.NewWriter(conn)
 
 	// Write desired request
@@ -62,7 +62,7 @@ func makeRequest(conn net.Conn, req *types.Request) (*types.Response, error) {
 		return nil, err
 	}
 	if _, ok := resFlush.Value.(*types.Response_Flush); !ok {
-		return nil, fmt.Errorf("Expected flush response but got something else: %v", reflect.TypeOf(resFlush))
+		return nil, fmt.Errorf("expected flush response but got something else: %v", reflect.TypeOf(resFlush))
 	}
 
 	return res, nil

abci/tests/client_server_test.go

@@ -13,7 +13,7 @@ import (
 func TestClientServerNoAddrPrefix(t *testing.T) {
 	addr := "localhost:26658"
 	transport := "socket"
-	app := kvstore.NewKVStoreApplication()
+	app := kvstore.NewApplication()
 
 	server, err := abciserver.NewServer(addr, transport, app)
 	assert.NoError(t, err, "expected no error on NewServer")

abci/tests/server/client.go

@@ -7,16 +7,16 @@ import (
 
 	abcicli "github.com/tendermint/tendermint/abci/client"
 	"github.com/tendermint/tendermint/abci/types"
-	cmn "github.com/tendermint/tendermint/libs/common"
+	tmrand "github.com/tendermint/tendermint/libs/rand"
 )
 
 func InitChain(client abcicli.Client) error {
 	total := 10
 	vals := make([]types.ValidatorUpdate, total)
 	for i := 0; i < total; i++ {
-		pubkey := cmn.RandBytes(33)
-		power := cmn.RandInt()
-		vals[i] = types.Ed25519ValidatorUpdate(pubkey, int64(power))
+		pubkey := tmrand.Bytes(33)
+		power := tmrand.Int()
+		vals[i] = types.UpdateValidator(pubkey, int64(power), "")
 	}
 	_, err := client.InitChainSync(types.RequestInitChain{
 		Validators: vals,
@@ -51,45 +51,45 @@ func Commit(client abcicli.Client, hashExp []byte) error {
 	if !bytes.Equal(data, hashExp) {
 		fmt.Println("Failed test: Commit")
 		fmt.Printf("Commit hash was unexpected. Got %X expected %X\n", data, hashExp)
-		return errors.New("CommitTx failed")
+		return errors.New("commitTx failed")
 	}
 	fmt.Println("Passed test: Commit")
 	return nil
 }
 
 func DeliverTx(client abcicli.Client, txBytes []byte, codeExp uint32, dataExp []byte) error {
-	res, _ := client.DeliverTxSync(txBytes)
+	res, _ := client.DeliverTxSync(types.RequestDeliverTx{Tx: txBytes})
 	code, data, log := res.Code, res.Data, res.Log
 	if code != codeExp {
 		fmt.Println("Failed test: DeliverTx")
 		fmt.Printf("DeliverTx response code was unexpected. Got %v expected %v. Log: %v\n",
 			code, codeExp, log)
-		return errors.New("DeliverTx error")
+		return errors.New("deliverTx error")
 	}
 	if !bytes.Equal(data, dataExp) {
 		fmt.Println("Failed test: DeliverTx")
 		fmt.Printf("DeliverTx response data was unexpected. Got %X expected %X\n",
 			data, dataExp)
-		return errors.New("DeliverTx error")
+		return errors.New("deliverTx error")
 	}
 	fmt.Println("Passed test: DeliverTx")
 	return nil
 }
 
 func CheckTx(client abcicli.Client, txBytes []byte, codeExp uint32, dataExp []byte) error {
-	res, _ := client.CheckTxSync(txBytes)
+	res, _ := client.CheckTxSync(types.RequestCheckTx{Tx: txBytes})
 	code, data, log := res.Code, res.Data, res.Log
 	if code != codeExp {
 		fmt.Println("Failed test: CheckTx")
 		fmt.Printf("CheckTx response code was unexpected. Got %v expected %v. Log: %v\n",
 			code, codeExp, log)
-		return errors.New("CheckTx")
+		return errors.New("checkTx")
 	}
 	if !bytes.Equal(data, dataExp) {
 		fmt.Println("Failed test: CheckTx")
 		fmt.Printf("CheckTx response data was unexpected. Got %X expected %X\n",
 			data, dataExp)
-		return errors.New("CheckTx")
+		return errors.New("checkTx")
 	}
 	fmt.Println("Passed test: CheckTx")
 	return nil

abci/tests/test_app/app.go

@@ -43,7 +43,7 @@ func commit(client abcicli.Client, hashExp []byte) {
 }
 
 func deliverTx(client abcicli.Client, txBytes []byte, codeExp uint32, dataExp []byte) {
-	res, err := client.DeliverTxSync(txBytes)
+	res, err := client.DeliverTxSync(types.RequestDeliverTx{Tx: txBytes})
 	if err != nil {
 		panicf("client error: %v", err)
 	}

abci/tests/test_app/main.go

@@ -36,7 +36,7 @@ func ensureABCIIsUp(typ string, n int) error {
 	}
 
 	for i := 0; i < n; i++ {
-		cmd := exec.Command("bash", "-c", cmdString) // nolint: gas
+		cmd := exec.Command("bash", "-c", cmdString)
 		_, err = cmd.CombinedOutput()
 		if err == nil {
 			break
@@ -53,20 +53,31 @@ func testCounter() {
 	}
 
 	fmt.Printf("Running %s test with abci=%s\n", abciApp, abciType)
-	cmd := exec.Command("bash", "-c", fmt.Sprintf("abci-cli %s", abciApp)) // nolint: gas
+	subCommand := fmt.Sprintf("abci-cli %s", abciApp)
+	cmd := exec.Command("bash", "-c", subCommand)
 	cmd.Stdout = os.Stdout
 	if err := cmd.Start(); err != nil {
 		log.Fatalf("starting %q err: %v", abciApp, err)
 	}
-	defer cmd.Wait()
-	defer cmd.Process.Kill()
+	defer func() {
+		if err := cmd.Process.Kill(); err != nil {
+			log.Printf("error on process kill: %v", err)
+		}
+		if err := cmd.Wait(); err != nil {
+			log.Printf("error while waiting for cmd to exit: %v", err)
+		}
+	}()
 
 	if err := ensureABCIIsUp(abciType, maxABCIConnectTries); err != nil {
-		log.Fatalf("echo failed: %v", err)
+		log.Fatalf("echo failed: %v", err) //nolint:gocritic
 	}
 
 	client := startClient(abciType)
-	defer client.Stop()
+	defer func() {
+		if err := client.Stop(); err != nil {
+			log.Printf("error trying client stop: %v", err)
+		}
+	}()
 
 	setOption(client, "serial", "on")
 	commit(client, nil)

abci/tests/test_app/test.sh

@@ -4,6 +4,7 @@ set -e
 # These tests spawn the counter app and server by execing the ABCI_APP command and run some simple client tests against it
 
 # Get the directory of where this script is.
+export PATH="$GOBIN:$PATH"
 SOURCE="${BASH_SOURCE[0]}"
 while [ -h "$SOURCE" ] ; do SOURCE="$(readlink "$SOURCE")"; done
 DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
@@ -13,13 +14,13 @@ cd "$DIR"
 
 echo "RUN COUNTER OVER SOCKET"
 # test golang counter
-ABCI_APP="counter" go run  ./*.go
+ABCI_APP="counter" go run -mod=readonly ./*.go
 echo "----------------------"
 
 
 echo "RUN COUNTER OVER GRPC"
 # test golang counter via grpc
-ABCI_APP="counter --abci=grpc" ABCI="grpc" go run ./*.go
+ABCI_APP="counter --abci=grpc" ABCI="grpc" go run -mod=readonly ./*.go
 echo "----------------------"
 
 # test nodejs counter

abci/tests/test_cli/ex1.abci.out

@@ -27,7 +27,7 @@
 > query "abc"
 -> code: OK
 -> log: exists
--> height: 0
+-> height: 2
 -> key: abc
 -> key.hex: 616263
 -> value: abc
@@ -43,7 +43,7 @@
 > query "def"
 -> code: OK
 -> log: exists
--> height: 0
+-> height: 3
 -> key: def
 -> key.hex: 646566
 -> value: xyz

abci/tests/test_cli/test.sh

@@ -2,6 +2,7 @@
 set -e
 
 # Get the root directory.
+export PATH="$GOBIN:$PATH"
 SOURCE="${BASH_SOURCE[0]}"
 while [ -h "$SOURCE" ] ; do SOURCE="$(readlink "$SOURCE")"; done
 DIR="$( cd -P "$( dirname "$SOURCE" )/../.." && pwd )"

abci/types/application.go

@@ -1,4 +1,4 @@
-package types // nolint: goimports
+package types
 
 import (
 	context "golang.org/x/net/context"
@@ -15,14 +15,20 @@ type Application interface {
 	Query(RequestQuery) ResponseQuery             // Query for state
 
 	// Mempool Connection
-	CheckTx(tx []byte) ResponseCheckTx // Validate a tx for the mempool
+	CheckTx(RequestCheckTx) ResponseCheckTx // Validate a tx for the mempool
 
 	// Consensus Connection
-	InitChain(RequestInitChain) ResponseInitChain    // Initialize blockchain with validators and other info from TendermintCore
+	InitChain(RequestInitChain) ResponseInitChain    // Initialize blockchain w validators/other info from TendermintCore
 	BeginBlock(RequestBeginBlock) ResponseBeginBlock // Signals the beginning of a block
-	DeliverTx(tx []byte) ResponseDeliverTx           // Deliver a tx for full processing
+	DeliverTx(RequestDeliverTx) ResponseDeliverTx    // Deliver a tx for full processing
 	EndBlock(RequestEndBlock) ResponseEndBlock       // Signals the end of a block, returns changes to the validator set
 	Commit() ResponseCommit                          // Commit the state and return the application Merkle root hash
+
+	// State Sync Connection
+	ListSnapshots(RequestListSnapshots) ResponseListSnapshots                // List available snapshots
+	OfferSnapshot(RequestOfferSnapshot) ResponseOfferSnapshot                // Offer a snapshot to the application
+	LoadSnapshotChunk(RequestLoadSnapshotChunk) ResponseLoadSnapshotChunk    // Load a snapshot chunk
+	ApplySnapshotChunk(RequestApplySnapshotChunk) ResponseApplySnapshotChunk // Apply a shapshot chunk
 }
 
 //-------------------------------------------------------
@@ -45,11 +51,11 @@ func (BaseApplication) SetOption(req RequestSetOption) ResponseSetOption {
 	return ResponseSetOption{}
 }
 
-func (BaseApplication) DeliverTx(tx []byte) ResponseDeliverTx {
+func (BaseApplication) DeliverTx(req RequestDeliverTx) ResponseDeliverTx {
 	return ResponseDeliverTx{Code: CodeTypeOK}
 }
 
-func (BaseApplication) CheckTx(tx []byte) ResponseCheckTx {
+func (BaseApplication) CheckTx(req RequestCheckTx) ResponseCheckTx {
 	return ResponseCheckTx{Code: CodeTypeOK}
 }
 
@@ -73,6 +79,22 @@ func (BaseApplication) EndBlock(req RequestEndBlock) ResponseEndBlock {
 	return ResponseEndBlock{}
 }
 
+func (BaseApplication) ListSnapshots(req RequestListSnapshots) ResponseListSnapshots {
+	return ResponseListSnapshots{}
+}
+
+func (BaseApplication) OfferSnapshot(req RequestOfferSnapshot) ResponseOfferSnapshot {
+	return ResponseOfferSnapshot{}
+}
+
+func (BaseApplication) LoadSnapshotChunk(req RequestLoadSnapshotChunk) ResponseLoadSnapshotChunk {
+	return ResponseLoadSnapshotChunk{}
+}
+
+func (BaseApplication) ApplySnapshotChunk(req RequestApplySnapshotChunk) ResponseApplySnapshotChunk {
+	return ResponseApplySnapshotChunk{}
+}
+
 //-------------------------------------------------------
 
 // GRPCApplication is a GRPC wrapper for Application
@@ -103,12 +125,12 @@ func (app *GRPCApplication) SetOption(ctx context.Context, req *RequestSetOption
 }
 
 func (app *GRPCApplication) DeliverTx(ctx context.Context, req *RequestDeliverTx) (*ResponseDeliverTx, error) {
-	res := app.app.DeliverTx(req.Tx)
+	res := app.app.DeliverTx(*req)
 	return &res, nil
 }
 
 func (app *GRPCApplication) CheckTx(ctx context.Context, req *RequestCheckTx) (*ResponseCheckTx, error) {
-	res := app.app.CheckTx(req.Tx)
+	res := app.app.CheckTx(*req)
 	return &res, nil
 }
 
@@ -136,3 +158,27 @@ func (app *GRPCApplication) EndBlock(ctx context.Context, req *RequestEndBlock)
 	res := app.app.EndBlock(*req)
 	return &res, nil
 }
+
+func (app *GRPCApplication) ListSnapshots(
+	ctx context.Context, req *RequestListSnapshots) (*ResponseListSnapshots, error) {
+	res := app.app.ListSnapshots(*req)
+	return &res, nil
+}
+
+func (app *GRPCApplication) OfferSnapshot(
+	ctx context.Context, req *RequestOfferSnapshot) (*ResponseOfferSnapshot, error) {
+	res := app.app.OfferSnapshot(*req)
+	return &res, nil
+}
+
+func (app *GRPCApplication) LoadSnapshotChunk(
+	ctx context.Context, req *RequestLoadSnapshotChunk) (*ResponseLoadSnapshotChunk, error) {
+	res := app.app.LoadSnapshotChunk(*req)
+	return &res, nil
+}
+
+func (app *GRPCApplication) ApplySnapshotChunk(
+	ctx context.Context, req *RequestApplySnapshotChunk) (*ResponseApplySnapshotChunk, error) {
+	res := app.app.ApplySnapshotChunk(*req)
+	return &res, nil
+}

abci/types/messages.go

@@ -93,15 +93,15 @@ func ToRequestSetOption(req RequestSetOption) *Request {
 	}
 }
 
-func ToRequestDeliverTx(tx []byte) *Request {
+func ToRequestDeliverTx(req RequestDeliverTx) *Request {
 	return &Request{
-		Value: &Request_DeliverTx{&RequestDeliverTx{Tx: tx}},
+		Value: &Request_DeliverTx{&req},
 	}
 }
 
-func ToRequestCheckTx(tx []byte) *Request {
+func ToRequestCheckTx(req RequestCheckTx) *Request {
 	return &Request{
-		Value: &Request_CheckTx{&RequestCheckTx{Tx: tx}},
+		Value: &Request_CheckTx{&req},
 	}
 }
 
@@ -135,6 +135,30 @@ func ToRequestEndBlock(req RequestEndBlock) *Request {
 	}
 }
 
+func ToRequestListSnapshots(req RequestListSnapshots) *Request {
+	return &Request{
+		Value: &Request_ListSnapshots{&req},
+	}
+}
+
+func ToRequestOfferSnapshot(req RequestOfferSnapshot) *Request {
+	return &Request{
+		Value: &Request_OfferSnapshot{&req},
+	}
+}
+
+func ToRequestLoadSnapshotChunk(req RequestLoadSnapshotChunk) *Request {
+	return &Request{
+		Value: &Request_LoadSnapshotChunk{&req},
+	}
+}
+
+func ToRequestApplySnapshotChunk(req RequestApplySnapshotChunk) *Request {
+	return &Request{
+		Value: &Request_ApplySnapshotChunk{&req},
+	}
+}
+
 //----------------------------------------
 
 func ToResponseException(errStr string) *Response {
@@ -208,3 +232,27 @@ func ToResponseEndBlock(res ResponseEndBlock) *Response {
 		Value: &Response_EndBlock{&res},
 	}
 }
+
+func ToResponseListSnapshots(res ResponseListSnapshots) *Response {
+	return &Response{
+		Value: &Response_ListSnapshots{&res},
+	}
+}
+
+func ToResponseOfferSnapshot(res ResponseOfferSnapshot) *Response {
+	return &Response{
+		Value: &Response_OfferSnapshot{&res},
+	}
+}
+
+func ToResponseLoadSnapshotChunk(res ResponseLoadSnapshotChunk) *Response {
+	return &Response{
+		Value: &Response_LoadSnapshotChunk{&res},
+	}
+}
+
+func ToResponseApplySnapshotChunk(res ResponseApplySnapshotChunk) *Response {
+	return &Response{
+		Value: &Response_ApplySnapshotChunk{&res},
+	}
+}

abci/types/messages_test.go

@@ -8,21 +8,26 @@ import (
 
 	"github.com/gogo/protobuf/proto"
 	"github.com/stretchr/testify/assert"
-	cmn "github.com/tendermint/tendermint/libs/common"
+
+	tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
 )
 
 func TestMarshalJSON(t *testing.T) {
 	b, err := json.Marshal(&ResponseDeliverTx{})
 	assert.Nil(t, err)
-	// Do not include empty fields.
-	assert.False(t, strings.Contains(string(b), "code"))
-
+	// include empty fields.
+	assert.True(t, strings.Contains(string(b), "code"))
 	r1 := ResponseCheckTx{
 		Code:      1,
 		Data:      []byte("hello"),
 		GasWanted: 43,
-		Tags: []cmn.KVPair{
-			{Key: []byte("pho"), Value: []byte("bo")},
+		Events: []Event{
+			{
+				Type: "testEvent",
+				Attributes: []EventAttribute{
+					{Key: []byte("pho"), Value: []byte("bo")},
+				},
+			},
 		},
 	}
 	b, err = json.Marshal(&r1)
@@ -50,14 +55,15 @@ func TestWriteReadMessageSimple(t *testing.T) {
 		err = ReadMessage(buf, msg)
 		assert.Nil(t, err)
 
-		assert.Equal(t, c, msg)
+		assert.True(t, proto.Equal(c, msg))
 	}
 }
 
 func TestWriteReadMessage(t *testing.T) {
 	cases := []proto.Message{
-		&Header{
-			NumTxs: 4,
+		&tmproto.Header{
+			Height:  4,
+			ChainID: "test",
 		},
 		// TODO: add the rest
 	}
@@ -67,11 +73,11 @@ func TestWriteReadMessage(t *testing.T) {
 		err := WriteMessage(c, buf)
 		assert.Nil(t, err)
 
-		msg := new(Header)
+		msg := new(tmproto.Header)
 		err = ReadMessage(buf, msg)
 		assert.Nil(t, err)
 
-		assert.Equal(t, c, msg)
+		assert.True(t, proto.Equal(c, msg))
 	}
 }
 
@@ -82,8 +88,13 @@ func TestWriteReadMessage2(t *testing.T) {
 			Data:      []byte(phrase),
 			Log:       phrase,
 			GasWanted: 10,
-			Tags: []cmn.KVPair{
-				cmn.KVPair{Key: []byte("abc"), Value: []byte("def")},
+			Events: []Event{
+				{
+					Type: "testEvent",
+					Attributes: []EventAttribute{
+						{Key: []byte("abc"), Value: []byte("def")},
+					},
+				},
 			},
 		},
 		// TODO: add the rest
@@ -98,6 +109,6 @@ func TestWriteReadMessage2(t *testing.T) {
 		err = ReadMessage(buf, msg)
 		assert.Nil(t, err)
 
-		assert.Equal(t, c, msg)
+		assert.True(t, proto.Equal(c, msg))
 	}
 }

abci/types/protoreplace/protoreplace.go

@@ -1,55 +0,0 @@
-// +build ignore
-
-package main
-
-import (
-	"bytes"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"os/exec"
-	"regexp"
-	"strings"
-)
-
-// This script replaces most `[]byte` with `data.Bytes` in a `.pb.go` file.
-// It was written before we realized we could use `gogo/protobuf` to achieve
-// this more natively. So it's here for safe keeping in case we ever need to
-// abandon `gogo/protobuf`.
-
-func main() {
-	bytePattern := regexp.MustCompile("[[][]]byte")
-	const oldPath = "types/types.pb.go"
-	const tmpPath = "types/types.pb.new"
-	content, err := ioutil.ReadFile(oldPath)
-	if err != nil {
-		panic("cannot read " + oldPath)
-		os.Exit(1)
-	}
-	lines := bytes.Split(content, []byte("\n"))
-	outFile, _ := os.Create(tmpPath)
-	wroteImport := false
-	for _, line_bytes := range lines {
-		line := string(line_bytes)
-		gotPackageLine := strings.HasPrefix(line, "package ")
-		writeImportTime := strings.HasPrefix(line, "import ")
-		containsDescriptor := strings.Contains(line, "Descriptor")
-		containsByteArray := strings.Contains(line, "[]byte")
-		if containsByteArray && !containsDescriptor {
-			line = string(bytePattern.ReplaceAll([]byte(line), []byte("data.Bytes")))
-		}
-		if writeImportTime && !wroteImport {
-			wroteImport = true
-			fmt.Fprintf(outFile, "import \"github.com/tendermint/go-wire/data\"\n")
-
-		}
-		if gotPackageLine {
-			fmt.Fprintf(outFile, "%s\n", "//nolint: gas")
-		}
-		fmt.Fprintf(outFile, "%s\n", line)
-	}
-	outFile.Close()
-	os.Remove(oldPath)
-	os.Rename(tmpPath, oldPath)
-	exec.Command("goimports", "-w", oldPath)
-}