fixups from retrying

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

.github/mergify.yml

@@ -1,18 +1,19 @@
-pull_request_rules:
-  - name: Automerge to master
+queue_rules:
+  - name: default
     conditions:
-      - base=master
+      - base=v0.35.x
+      - label=S:automerge
+
+pull_request_rules:
+  - name: Automerge to v0.35.x
+    conditions:
+      - base=v0.35.x
       - label=S:automerge
     actions:
-      merge:
+      queue:
         method: squash
-        strict: smart+fasttrack
-        commit_message: title+body
-  - name: backport patches to v0.34.x branch
-    conditions:
-      - base=master
-      - label=S:backport-to-v0.34.x
-    actions:
-      backport:
-        branches:
-          - v0.34.x
+        name: default
+        commit_message_template: |
+          {{ title }} (#{{ number }})
+
+          {{ body }}

.github/workflows/build.yml

@@ -0,0 +1,82 @@
+name: Build
+# 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:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        goarch: ["arm", "amd64"]
+        goos: ["linux"]
+    timeout-minutes: 5
+    steps:
+      - uses: actions/setup-go@v2
+        with:
+          go-version: "1.17"
+      - uses: actions/checkout@v2.4.0
+      - uses: technote-space/get-diff-action@v5
+        with:
+          PATTERNS: |
+            **/**.go
+            "!test/"
+            go.mod
+            go.sum
+            Makefile
+      - name: install
+        run: GOOS=${{ matrix.goos }} GOARCH=${{ matrix.goarch }} make build
+        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: "1.17"
+      - uses: actions/checkout@v2.4.0
+      - uses: technote-space/get-diff-action@v5
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - name: install
+        run: make install_abci
+        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: "1.17"
+      - uses: actions/checkout@v2.4.0
+      - uses: technote-space/get-diff-action@v5
+        with:
+          PATTERNS: |
+            **/**.go
+            go.mod
+            go.sum
+      - name: install
+        run: make install install_abci
+        if: "env.GIT_DIFF != ''"
+      - name: test_apps
+        run: test/app/test.sh
+        shell: bash
+        if: "env.GIT_DIFF != ''"

.github/workflows/coverage.yml

@@ -1,132 +0,0 @@
-name: Test Coverage
-on:
-  pull_request:
-  push:
-    paths:
-      - "**.go"
-    branches:
-      - master
-      - release/**
-
-jobs:
-  split-test-files:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2.3.4
-      - 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: "1.17"
-      - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v5
-        with:
-          PATTERNS: |
-            **/**.go
-            "!test/"
-            go.mod
-            go.sum
-      - name: install
-        run: GOOS=linux GOARCH=${{ matrix.goarch }} make build
-        if: "env.GIT_DIFF != ''"
-
-  tests:
-    runs-on: ubuntu-latest
-    needs: split-test-files
-    strategy:
-      fail-fast: false
-      matrix:
-        part: ["00", "01", "02", "03"]
-    steps:
-      - uses: actions/setup-go@v2
-        with:
-          go-version: "1.17"
-      - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v5
-        with:
-          PATTERNS: |
-            **/**.go
-            "!test/"
-            go.mod
-            go.sum
-      - uses: actions/download-artifact@v2
-        with:
-          name: "${{ github.sha }}-${{ matrix.part }}"
-        if: env.GIT_DIFF
-      - name: Set up Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: "1.17"
-      - name: test & coverage report creation
-        run: |
-          cat pkgs.txt.part.${{ matrix.part }} | xargs go test -mod=readonly -timeout 8m -race -coverprofile=${{ matrix.part }}profile.out
-        if: env.GIT_DIFF
-      - uses: actions/upload-artifact@v2
-        with:
-          name: "${{ github.sha }}-${{ matrix.part }}-coverage"
-          path: ./${{ matrix.part }}profile.out
-
-  upload-coverage-report:
-    runs-on: ubuntu-latest
-    needs: tests
-    steps:
-      - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v5
-        with:
-          PATTERNS: |
-            **/**.go
-            "!test/"
-            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: set" >> coverage.txt
-        if: env.GIT_DIFF
-      - uses: codecov/codecov-action@v2.1.0
-        with:
-          file: ./coverage.txt
-        if: env.GIT_DIFF

.github/workflows/docker.yml

@@ -1,8 +1,7 @@
-name: Build & Push
+name: Docker
 #  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
@@ -39,7 +38,7 @@ jobs:
         with:
           platforms: all
 
-      - name: Set up Docker Buildx
+      - name: Set up Docker Build
         uses: docker/setup-buildx-action@v1.6.0
 
       - name: Login to DockerHub

.github/workflows/fuzz-nightly.yml

@@ -1,5 +1,5 @@
 # Runs fuzzing nightly.
-name: fuzz-nightly
+name: Fuzz Tests
 on:
   workflow_dispatch: # allow running workflow manually
   schedule:

.github/workflows/lint.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 8
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.4.0
       - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
@@ -23,7 +23,7 @@ jobs:
       - 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: v1.38
+          version: v1.42.1
           args: --timeout 10m
           github-token: ${{ secrets.github_token }}
         if: env.GIT_DIFF

.github/workflows/linter.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.4.0
       - name: Lint Code Base
         uses: docker://github/super-linter:v3
         env:

.github/workflows/tests.yml

@@ -1,19 +1,20 @@
-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
+name: Test
 on:
   pull_request:
   push:
+    paths:
+      - "**.go"
     branches:
       - master
       - release/**
 
 jobs:
-  build:
-    name: Build
+  tests:
     runs-on: ubuntu-latest
-    timeout-minutes: 5
+    strategy:
+      fail-fast: false
+      matrix:
+        part: ["00", "01", "02", "03"]
     steps:
       - uses: actions/setup-go@v2
         with:
@@ -23,84 +24,52 @@ jobs:
         with:
           PATTERNS: |
             **/**.go
+            "!test/"
             go.mod
             go.sum
-      - name: install
-        run: make install install_abci
-        if: "env.GIT_DIFF != ''"
-      - uses: actions/cache@v2.1.6
-        with:
-          path: ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-          restore-keys: |
-            ${{ runner.os }}-go-
+            Makefile
+      - name: Run Go Tests
+        run: |
+          make test-group-${{ matrix.part }} NUM_SPLIT=4
         if: env.GIT_DIFF
-      # Cache binaries for use by other jobs
-      - uses: actions/cache@v2.1.6
+      - uses: actions/upload-artifact@v2
         with:
-          path: ~/go/bin
-          key: ${{ runner.os }}-${{ github.sha }}-tm-binary
-        if: env.GIT_DIFF
+          name: "${{ github.sha }}-${{ matrix.part }}-coverage"
+          path: ./build/${{ matrix.part }}.profile.out
 
-  test_abci_cli:
+  upload-coverage-report:
     runs-on: ubuntu-latest
-    needs: build
-    timeout-minutes: 5
+    needs: tests
     steps:
-      - uses: actions/setup-go@v2
-        with:
-          go-version: "1.17"
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.4.0
       - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go
+            "!test/"
             go.mod
             go.sum
-      - uses: actions/cache@v2.1.6
+            Makefile
+      - uses: actions/download-artifact@v2
         with:
-          path: ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-          restore-keys: |
-            ${{ runner.os }}-go-
+          name: "${{ github.sha }}-00-coverage"
         if: env.GIT_DIFF
-      - uses: actions/cache@v2.1.6
+      - uses: actions/download-artifact@v2
         with:
-          path: ~/go/bin
-          key: ${{ runner.os }}-${{ github.sha }}-tm-binary
+          name: "${{ github.sha }}-01-coverage"
         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
+      - uses: actions/download-artifact@v2
         with:
-          go-version: "1.17"
-      - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v5
-        with:
-          PATTERNS: |
-            **/**.go
-            go.mod
-            go.sum
-      - uses: actions/cache@v2.1.6
-        with:
-          path: ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-          restore-keys: |
-            ${{ runner.os }}-go-
+          name: "${{ github.sha }}-02-coverage"
         if: env.GIT_DIFF
-      - uses: actions/cache@v2.1.6
+      - uses: actions/download-artifact@v2
         with:
-          path: ~/go/bin
-          key: ${{ runner.os }}-${{ github.sha }}-tm-binary
+          name: "${{ github.sha }}-03-coverage"
         if: env.GIT_DIFF
-      - name: test_apps
-        run: test/app/test.sh
-        shell: bash
+      - run: |
+          cat ./*profile.out | grep -v "mode: set" >> coverage.txt
+        if: env.GIT_DIFF
+      - uses: codecov/codecov-action@v2.1.0
+        with:
+          file: ./coverage.txt
         if: env.GIT_DIFF

.gitignore

@@ -25,6 +25,7 @@ docs/_build
 docs/dist
 docs/node_modules/
 docs/spec
+docs/.vuepress/public/rpc
 index.html.md
 libs/pubsub/query/fuzz_test/output
 profile\.out

.golangci.yml

@@ -13,18 +13,18 @@ linters:
     # - gochecknoinits
     # - gocognit
     - goconst
-    - gocritic
+    # - gocritic
     # - gocyclo
     # - godox
     - gofmt
     - goimports
-    - golint
+    - revive
     - gosec
     - gosimple
     - govet
     - ineffassign
     # - interfacer
-    - lll
+    # - lll
     # - maligned
     - misspell
     - nakedret
@@ -33,7 +33,7 @@ linters:
     - staticcheck
     - structcheck
     - stylecheck
-    - typecheck
+    # - typecheck
     - unconvert
     # - unparam
     - unused
@@ -46,9 +46,6 @@ issues:
     - path: _test\.go
       linters:
         - gosec
-    - linters:
-        - lll
-      source: "https://"
   max-same-issues: 50
 
 linters-settings:

CHANGELOG.md

@@ -2,9 +2,49 @@
 
 Friendly reminder: We have a [bug bounty program](https://hackerone.com/cosmos).
 
-## v0.35.0-rc2
+## v0.35.0
 
-September 27, 2021
+November 4, 2021
+
+Special thanks to external contributors on this release: @JayT106,
+@bipulprasad, @alessio, @Yawning, @silasdavis, @cuonglm, @tanyabouman,
+@JoeKash, @githubsands, @jeebster, @crypto-facs, @liamsi, and @gotjoshua
+
+### FEATURES
+
+- [cli] [#7033](https://github.com/tendermint/tendermint/pull/7033) Add a `rollback` command to rollback to the previous tendermint state in the event of an incorrect app hash. (@cmwaters)
+- [config] [\#7174](https://github.com/tendermint/tendermint/pull/7174) expose ability to write config to arbitrary paths. (@tychoish)
+- [mempool, rpc] [\#7065](https://github.com/tendermint/tendermint/pull/7065) add removetx rpc method (backport of #7047) (@tychoish).
+- [\#6982](https://github.com/tendermint/tendermint/pull/6982) tendermint binary has built-in suppport for running the e2e application (with state sync support) (@cmwaters).
+- [config] Add `--mode` flag and config variable. See [ADR-52](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-052-tendermint-mode.md) @dongsam
+- [rpc] [\#6329](https://github.com/tendermint/tendermint/pull/6329) Don't cap page size in unsafe mode (@gotjoshua, @cmwaters)
+- [pex] [\#6305](https://github.com/tendermint/tendermint/pull/6305) v2 pex reactor with backwards compatability. Introduces two new pex messages to
+  accomodate for the new p2p stack. Removes the notion of seeds and crawling. All peer
+  exchange reactors behave the same. (@cmwaters)
+- [crypto] [\#6376](https://github.com/tendermint/tendermint/pull/6376) Enable sr25519 as a validator key type
+- [mempool] [\#6466](https://github.com/tendermint/tendermint/pull/6466) Introduction of a prioritized mempool. (@alexanderbez)
+  - `Priority` and `Sender` have been introduced into the `ResponseCheckTx` type, where the `priority` will determine the prioritization of
+  the transaction when a proposer reaps transactions for a block proposal. The `sender` field acts as an index.
+  - Operators may toggle between the legacy mempool reactor, `v0`, and the new prioritized reactor, `v1`, by setting the
+  `mempool.version` configuration, where `v1` is the default configuration.
+  - Applications that do not specify a priority, i.e. zero, will have transactions reaped by the order in which they are received by the node.
+  - Transactions are gossiped in FIFO order as they are in `v0`.
+- [config/indexer] [\#6411](https://github.com/tendermint/tendermint/pull/6411) Introduce support for custom event indexing data sources, specifically PostgreSQL. (@JayT106)
+- [blocksync/event] [\#6619](https://github.com/tendermint/tendermint/pull/6619) Emit blocksync status event when switching consensus/blocksync (@JayT106)
+- [statesync/event] [\#6700](https://github.com/tendermint/tendermint/pull/6700) Emit statesync status start/end event (@JayT106)
+- [inspect] [\#6785](https://github.com/tendermint/tendermint/pull/6785) Add a new `inspect` command for introspecting the state and block store of a crashed tendermint node. (@williambanfield)
+
+### BUG FIXES
+
+- [\#7106](https://github.com/tendermint/tendermint/pull/7106) Revert mutex change to ABCI Clients (@tychoish).
+- [\#7142](https://github.com/tendermint/tendermint/pull/7142) mempool: remove panic when recheck-tx was not sent to ABCI application (@williambanfield).
+- [consensus]: [\#7060](https://github.com/tendermint/tendermint/pull/7060)
+  wait until peerUpdates channel is closed to close remaining peers (@williambanfield)
+- [privval] [\#5638](https://github.com/tendermint/tendermint/pull/5638) Increase read/write timeout to 5s and calculate ping interval based on it (@JoeKash)
+- [evidence] [\#6375](https://github.com/tendermint/tendermint/pull/6375) Fix bug with inconsistent LightClientAttackEvidence hashing (cmwaters)
+- [rpc] [\#6507](https://github.com/tendermint/tendermint/pull/6507) Ensure RPC client can handle URLs without ports (@JayT106)
+- [statesync] [\#6463](https://github.com/tendermint/tendermint/pull/6463) Adds Reverse Sync feature to fetch historical light blocks after state sync in order to verify any evidence (@cmwaters)
+- [blocksync] [\#6590](https://github.com/tendermint/tendermint/pull/6590) Update the metrics during blocksync (@JayT106)
 
 ### BREAKING CHANGES
 
@@ -16,53 +56,6 @@ September 27, 2021
   - [state] [store] [proxy] [rpc/core]: [\#6937](https://github.com/tendermint/tendermint/pull/6937) move packages to
     `internal` to prevent consumption of these internal APIs by
     external users. (@tychoish)
-
-### FEATURES
-
-- [\#6982](https://github.com/tendermint/tendermint/pull/6982) tendermint binary has built-in suppport for running the e2e application (with state sync support) (@cmwaters).
-
-
-## v0.35.0-rc1
-
-September 8, 2021
-
-Special thanks to external contributors on this release: @JayT106, @bipulprasad, @alessio, @Yawning, @silasdavis,
-@cuonglm, @tanyabouman, @JoeKash, @githubsands, @jeebster, @crypto-facs, @liamsi, and @gotjoshua
-
-### BREAKING CHANGES
-
-- CLI/RPC/Config
-  - [pubsub/events] [\#6634](https://github.com/tendermint/tendermint/pull/6634) The `ResultEvent.Events` field is now of type `[]abci.Event` preserving event order instead of `map[string][]string`. (@alexanderbez)
-  - [config] [\#5598](https://github.com/tendermint/tendermint/pull/5598) The `test_fuzz` and `test_fuzz_config` P2P settings have been removed. (@erikgrinaker)
-  - [config] [\#5728](https://github.com/tendermint/tendermint/pull/5728) `fastsync.version = "v1"` is no longer supported (@melekes)
-  - [cli] [\#5772](https://github.com/tendermint/tendermint/pull/5772) `gen_node_key` prints JSON-encoded `NodeKey` rather than ID and does not save it to `node_key.json` (@melekes)
-  - [cli] [\#5777](https://github.com/tendermint/tendermint/pull/5777) use hyphen-case instead of snake_case for all cli commands and config parameters (@cmwaters)
-  - [rpc] [\#6019](https://github.com/tendermint/tendermint/pull/6019) standardise RPC errors and return the correct status code (@bipulprasad & @cmwaters)
-  - [rpc] [\#6168](https://github.com/tendermint/tendermint/pull/6168) Change default sorting to desc for `/tx_search` results (@melekes)
-  - [cli] [\#6282](https://github.com/tendermint/tendermint/pull/6282) User must specify the node mode when using `tendermint init` (@cmwaters)
-  - [state/indexer] [\#6382](https://github.com/tendermint/tendermint/pull/6382) reconstruct indexer, move txindex into the indexer package (@JayT106)
-  - [cli] [\#6372](https://github.com/tendermint/tendermint/pull/6372) Introduce `BootstrapPeers` as part of the new p2p stack. Peers to be connected on  startup (@cmwaters)
-  - [config] [\#6462](https://github.com/tendermint/tendermint/pull/6462) Move `PrivValidator` configuration out of `BaseConfig` into its own section. (@tychoish)
-  - [rpc] [\#6610](https://github.com/tendermint/tendermint/pull/6610) Add MaxPeerBlockHeight into /status rpc call (@JayT106)
-  - [blocksync/rpc] [\#6620](https://github.com/tendermint/tendermint/pull/6620) Add TotalSyncedTime & RemainingTime to SyncInfo in /status RPC  (@JayT106)
-  - [rpc/grpc] [\#6725](https://github.com/tendermint/tendermint/pull/6725) Mark gRPC in the RPC layer as deprecated.
-  - [blocksync/v2] [\#6730](https://github.com/tendermint/tendermint/pull/6730) Fast Sync v2 is deprecated, please use v0
-  - [rpc] Add genesis_chunked method to support paginated and parallel fetching of large genesis documents.
-  - [rpc/jsonrpc/server] [\#6785](https://github.com/tendermint/tendermint/pull/6785) `Listen` function updated to take an `int` argument, `maxOpenConnections`, instead of an entire config object. (@williambanfield)
-  - [rpc] [\#6820](https://github.com/tendermint/tendermint/pull/6820) Update RPC methods to reflect changes in the p2p layer, disabling support for `UnsafeDialPeers` and `UnsafeDialPeers` when used with the new p2p layer, and changing the response format of the peer list in `NetInfo` for all users.
-  - [cli] [\#6854](https://github.com/tendermint/tendermint/pull/6854) Remove deprecated snake case commands. (@tychoish)
-
-- Apps
-  - [ABCI] [\#6408](https://github.com/tendermint/tendermint/pull/6408) Change the `key` and `value` fields from `[]byte` to `string` in the `EventAttribute` type. (@alexanderbez)
-  - [ABCI] [\#5447](https://github.com/tendermint/tendermint/pull/5447) Remove `SetOption` method from `ABCI.Client` interface
-  - [ABCI] [\#5447](https://github.com/tendermint/tendermint/pull/5447) Reset `Oneof` indexes for  `Request` and `Response`.
-  - [ABCI] [\#5818](https://github.com/tendermint/tendermint/pull/5818) Use protoio for msg length delimitation. Migrates from int64 to uint64 length delimiters.
-  - [ABCI] [\#3546](https://github.com/tendermint/tendermint/pull/3546) Add `mempool_error` field to `ResponseCheckTx`. This field will contain an error string if Tendermint encountered an error while adding a transaction to the mempool. (@williambanfield)
-  - [Version] [\#6494](https://github.com/tendermint/tendermint/pull/6494) `TMCoreSemVer` has been renamed to `TMVersion`.
-	- It is not required any longer to set ldflags to set version strings
-  - [abci/counter] [\#6684](https://github.com/tendermint/tendermint/pull/6684) Delete counter example app
-
-- Go API
   - [pubsub] [\#6634](https://github.com/tendermint/tendermint/pull/6634) The `Query#Matches` method along with other pubsub methods, now accepts a `[]abci.Event` instead of `map[string][]string`. (@alexanderbez)
   - [p2p] [\#6618](https://github.com/tendermint/tendermint/pull/6618) [\#6583](https://github.com/tendermint/tendermint/pull/6583) Move `p2p.NodeInfo`, `p2p.NodeID` and `p2p.NetAddress` into `types` to support use in external packages. (@tychoish)
   - [node] [\#6540](https://github.com/tendermint/tendermint/pull/6540) Reduce surface area of the `node` package by making most of the implementation details private. (@tychoish)
@@ -98,35 +91,46 @@ Special thanks to external contributors on this release: @JayT106, @bipulprasad,
   - [config] [\#6627](https://github.com/tendermint/tendermint/pull/6627) Extend `config` to contain methods `LoadNodeKeyID` and `LoadorGenNodeKeyID`
   - [blocksync] [\#6755](https://github.com/tendermint/tendermint/pull/6755) Rename `FastSync` and `Blockchain` package to `BlockSync` (@cmwaters)
 
+- CLI/RPC/Config
+
+  - [pubsub/events] [\#6634](https://github.com/tendermint/tendermint/pull/6634) The `ResultEvent.Events` field is now of type `[]abci.Event` preserving event order instead of `map[string][]string`. (@alexanderbez)
+  - [config] [\#5598](https://github.com/tendermint/tendermint/pull/5598) The `test_fuzz` and `test_fuzz_config` P2P settings have been removed. (@erikgrinaker)
+  - [config] [\#5728](https://github.com/tendermint/tendermint/pull/5728) `fastsync.version = "v1"` is no longer supported (@melekes)
+  - [cli] [\#5772](https://github.com/tendermint/tendermint/pull/5772) `gen_node_key` prints JSON-encoded `NodeKey` rather than ID and does not save it to `node_key.json` (@melekes)
+  - [cli] [\#5777](https://github.com/tendermint/tendermint/pull/5777) use hyphen-case instead of snake_case for all cli commands and config parameters (@cmwaters)
+  - [rpc] [\#6019](https://github.com/tendermint/tendermint/pull/6019) standardise RPC errors and return the correct status code (@bipulprasad & @cmwaters)
+  - [rpc] [\#6168](https://github.com/tendermint/tendermint/pull/6168) Change default sorting to desc for `/tx_search` results (@melekes)
+  - [cli] [\#6282](https://github.com/tendermint/tendermint/pull/6282) User must specify the node mode when using `tendermint init` (@cmwaters)
+  - [state/indexer] [\#6382](https://github.com/tendermint/tendermint/pull/6382) reconstruct indexer, move txindex into the indexer package (@JayT106)
+  - [cli] [\#6372](https://github.com/tendermint/tendermint/pull/6372) Introduce `BootstrapPeers` as part of the new p2p stack. Peers to be connected on  startup (@cmwaters)
+  - [config] [\#6462](https://github.com/tendermint/tendermint/pull/6462) Move `PrivValidator` configuration out of `BaseConfig` into its own section. (@tychoish)
+  - [rpc] [\#6610](https://github.com/tendermint/tendermint/pull/6610) Add MaxPeerBlockHeight into /status rpc call (@JayT106)
+  - [blocksync/rpc] [\#6620](https://github.com/tendermint/tendermint/pull/6620) Add TotalSyncedTime & RemainingTime to SyncInfo in /status RPC  (@JayT106)
+  - [rpc/grpc] [\#6725](https://github.com/tendermint/tendermint/pull/6725) Mark gRPC in the RPC layer as deprecated.
+  - [blocksync/v2] [\#6730](https://github.com/tendermint/tendermint/pull/6730) Fast Sync v2 is deprecated, please use v0
+  - [rpc] Add genesis_chunked method to support paginated and parallel fetching of large genesis documents.
+  - [rpc/jsonrpc/server] [\#6785](https://github.com/tendermint/tendermint/pull/6785) `Listen` function updated to take an `int` argument, `maxOpenConnections`, instead of an entire config object. (@williambanfield)
+  - [rpc] [\#6820](https://github.com/tendermint/tendermint/pull/6820) Update RPC methods to reflect changes in the p2p layer, disabling support for `UnsafeDialPeers` and `UnsafeDialPeers` when used with the new p2p layer, and changing the response format of the peer list in `NetInfo` for all users.
+  - [cli] [\#6854](https://github.com/tendermint/tendermint/pull/6854) Remove deprecated snake case commands. (@tychoish)
+  - [tools] [\#6498](https://github.com/tendermint/tendermint/pull/6498) Set OS home dir to instead of the hardcoded PATH. (@JayT106)
+  - [cli/indexer] [\#6676](https://github.com/tendermint/tendermint/pull/6676) Reindex events command line tooling. (@JayT106)
+
+- Apps
+
+  - [ABCI] [\#6408](https://github.com/tendermint/tendermint/pull/6408) Change the `key` and `value` fields from `[]byte` to `string` in the `EventAttribute` type. (@alexanderbez)
+  - [ABCI] [\#5447](https://github.com/tendermint/tendermint/pull/5447) Remove `SetOption` method from `ABCI.Client` interface
+  - [ABCI] [\#5447](https://github.com/tendermint/tendermint/pull/5447) Reset `Oneof` indexes for  `Request` and `Response`.
+  - [ABCI] [\#5818](https://github.com/tendermint/tendermint/pull/5818) Use protoio for msg length delimitation. Migrates from int64 to uint64 length delimiters.
+  - [ABCI] [\#3546](https://github.com/tendermint/tendermint/pull/3546) Add `mempool_error` field to `ResponseCheckTx`. This field will contain an error string if Tendermint encountered an error while adding a transaction to the mempool. (@williambanfield)
+  - [Version] [\#6494](https://github.com/tendermint/tendermint/pull/6494) `TMCoreSemVer` has been renamed to `TMVersion`.
+	- It is not required any longer to set ldflags to set version strings
+  - [abci/counter] [\#6684](https://github.com/tendermint/tendermint/pull/6684) Delete counter example app
+
 - Data Storage
   - [store/state/evidence/light] [\#5771](https://github.com/tendermint/tendermint/pull/5771) Use an order-preserving varint key encoding (@cmwaters)
   - [mempool] [\#6396](https://github.com/tendermint/tendermint/pull/6396) Remove mempool's write ahead log (WAL), (previously unused by the tendermint code). (@tychoish)
   - [state] [\#6541](https://github.com/tendermint/tendermint/pull/6541) Move pruneBlocks from consensus/state to state/execution. (@JayT106)
 
-- Tooling
-  - [tools] [\#6498](https://github.com/tendermint/tendermint/pull/6498) Set OS home dir to instead of the hardcoded PATH. (@JayT106)
-  - [cli/indexer] [\#6676](https://github.com/tendermint/tendermint/pull/6676) Reindex events command line tooling. (@JayT106)
-
-### FEATURES
-
-- [config] Add `--mode` flag and config variable. See [ADR-52](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-052-tendermint-mode.md) @dongsam
-- [rpc] [\#6329](https://github.com/tendermint/tendermint/pull/6329) Don't cap page size in unsafe mode (@gotjoshua, @cmwaters)
-- [pex] [\#6305](https://github.com/tendermint/tendermint/pull/6305) v2 pex reactor with backwards compatability. Introduces two new pex messages to
-  accomodate for the new p2p stack. Removes the notion of seeds and crawling. All peer
-  exchange reactors behave the same. (@cmwaters)
-- [crypto] [\#6376](https://github.com/tendermint/tendermint/pull/6376) Enable sr25519 as a validator key type
-- [mempool] [\#6466](https://github.com/tendermint/tendermint/pull/6466) Introduction of a prioritized mempool. (@alexanderbez)
-  - `Priority` and `Sender` have been introduced into the `ResponseCheckTx` type, where the `priority` will determine the prioritization of
-  the transaction when a proposer reaps transactions for a block proposal. The `sender` field acts as an index.
-  - Operators may toggle between the legacy mempool reactor, `v0`, and the new prioritized reactor, `v1`, by setting the
-  `mempool.version` configuration, where `v1` is the default configuration.
-  - Applications that do not specify a priority, i.e. zero, will have transactions reaped by the order in which they are received by the node.
-  - Transactions are gossiped in FIFO order as they are in `v0`.
-- [config/indexer] [\#6411](https://github.com/tendermint/tendermint/pull/6411) Introduce support for custom event indexing data sources, specifically PostgreSQL. (@JayT106)
-- [blocksync/event] [\#6619](https://github.com/tendermint/tendermint/pull/6619) Emit blocksync status event when switching consensus/blocksync (@JayT106)
-- [statesync/event] [\#6700](https://github.com/tendermint/tendermint/pull/6700) Emit statesync status start/end event (@JayT106)
-- [inspect] [\#6785](https://github.com/tendermint/tendermint/pull/6785) Add a new `inspect` command for introspecting the state and block store of a crashed tendermint node. (@williambanfield)
-
 ### IMPROVEMENTS
 
 - [libs/log] Console log formatting changes as a result of [\#6534](https://github.com/tendermint/tendermint/pull/6534) and [\#6589](https://github.com/tendermint/tendermint/pull/6589). (@tychoish)
@@ -170,14 +174,6 @@ Special thanks to external contributors on this release: @JayT106, @bipulprasad,
 - [cmd/tendermint/commands] [\#6623](https://github.com/tendermint/tendermint/pull/6623) replace `$HOME/.some/test/dir` with `t.TempDir` (@tanyabouman)
 - [statesync] \6807 Implement P2P state provider as an alternative to RPC (@cmwaters)
 
-### BUG FIXES
-
-- [privval] [\#5638](https://github.com/tendermint/tendermint/pull/5638) Increase read/write timeout to 5s and calculate ping interval based on it (@JoeKash)
-- [evidence] [\#6375](https://github.com/tendermint/tendermint/pull/6375) Fix bug with inconsistent LightClientAttackEvidence hashing (cmwaters)
-- [rpc] [\#6507](https://github.com/tendermint/tendermint/pull/6507) Ensure RPC client can handle URLs without ports (@JayT106)
-- [statesync] [\#6463](https://github.com/tendermint/tendermint/pull/6463) Adds Reverse Sync feature to fetch historical light blocks after state sync in order to verify any evidence (@cmwaters)
-- [blocksync] [\#6590](https://github.com/tendermint/tendermint/pull/6590) Update the metrics during blocksync (@JayT106)
-
 ## v0.34.13
 
 *September 6, 2021*

CHANGELOG_PENDING.md

@@ -12,16 +12,27 @@ Special thanks to external contributors on this release:
 
 - CLI/RPC/Config
 
+  - [config] [\#7276](https://github.com/tendermint/tendermint/pull/7276) rpc: Add experimental config params to allow for subscription buffer size control (@thanethomson).
+
 - Apps
 
 - P2P Protocol
 
+  - [p2p] [\#7265](https://github.com/tendermint/tendermint/pull/7265) Peer manager reduces peer score for each failed dial attempts for peers that have not successfully dialed. (@tychoish)
+
 - Go API
 
 - Blockchain Protocol
 
 ### FEATURES
 
+- [rpc] [\#7270](https://github.com/tendermint/tendermint/pull/7270) Add `header` and `header_by_hash` RPC Client queries. (@fedekunze) (@cmwaters)
+
 ### IMPROVEMENTS
+- [internal/protoio] \#7325 Optimized `MarshalDelimited` by inlining the common case and using a `sync.Pool` in the worst case. (@odeke-em)
+
+- [\#7338](https://github.com/tendermint/tendermint/pull/7338) pubsub: Performance improvements for the event query API (backport of #7319) (@creachadair)
 
 ### BUG FIXES
+
+- [\#7310](https://github.com/tendermint/tendermint/issues/7310) pubsub: Report a non-nil error when shutting down (fixes #7306).

Makefile

@@ -1,6 +1,5 @@
 #!/usr/bin/make -f
 
-PACKAGES=$(shell go list ./...)
 BUILDDIR ?= $(CURDIR)/build
 
 BUILD_TAGS?=tendermint
@@ -15,7 +14,9 @@ endif
 LD_FLAGS = -X github.com/tendermint/tendermint/version.TMVersion=$(VERSION)
 BUILD_FLAGS = -mod=readonly -ldflags "$(LD_FLAGS)"
 HTTPS_GIT := https://github.com/tendermint/tendermint.git
-DOCKER_BUF := docker run -v $(shell pwd):/workspace --workdir /workspace bufbuild/buf
+BUILD_IMAGE := ghcr.io/tendermint/docker-build-proto
+BASE_BRANCH := v0.35.x
+DOCKER_PROTO := docker run -v $(shell pwd):/workspace --workdir /workspace $(BUILD_IMAGE)
 CGO_ENABLED ?= 0
 
 # handle nostrip
@@ -83,26 +84,28 @@ proto-all: proto-gen proto-lint proto-check-breaking
 .PHONY: proto-all
 
 proto-gen:
-	@docker pull -q tendermintdev/docker-build-proto
-	@echo "Generating Protobuf files"
-	@docker run -v $(shell pwd):/workspace --workdir /workspace tendermintdev/docker-build-proto sh ./scripts/protocgen.sh
+	@echo "Generating Go packages for .proto files"
+	@$(DOCKER_PROTO) sh ./scripts/protocgen.sh
 .PHONY: proto-gen
 
 proto-lint:
-	@$(DOCKER_BUF) check lint --error-format=json
+	@echo "Running lint checks for .proto files"
+	@$(DOCKER_PROTO) buf lint --error-format=json
 .PHONY: proto-lint
 
 proto-format:
-	@echo "Formatting Protobuf files"
-	docker run -v $(shell pwd):/workspace --workdir /workspace tendermintdev/docker-build-proto find ./ -not -path "./third_party/*" -name *.proto -exec clang-format -i {} \;
+	@echo "Formatting .proto files"
+	@$(DOCKER_PROTO) find ./ -not -path "./third_party/*" -name '*.proto' -exec clang-format -i {} \;
 .PHONY: proto-format
 
 proto-check-breaking:
-	@$(DOCKER_BUF) check breaking --against-input .git#branch=master
+	@echo "Checking for breaking changes in .proto files"
+	@$(DOCKER_PROTO) buf breaking --against .git#branch=$(BASE_BRANCH)
 .PHONY: proto-check-breaking
 
 proto-check-breaking-ci:
-	@$(DOCKER_BUF) check breaking --against-input $(HTTPS_GIT)#branch=master
+	@echo "Checking for breaking changes in .proto files"
+	@$(DOCKER_PROTO) buf breaking --against $(HTTPS_GIT)#branch=$(BASE_BRANCH)
 .PHONY: proto-check-breaking-ci
 
 ###############################################################################
@@ -118,7 +121,7 @@ install_abci:
 .PHONY: install_abci
 
 ###############################################################################
-###                           	Privval Server                              ###
+###				Privval Server                              ###
 ###############################################################################
 
 build_privval_server:
@@ -227,13 +230,13 @@ build-docs:
 
 build-docker: build-linux
 	cp $(BUILDDIR)/tendermint DOCKER/tendermint
-	docker build --label=tendermint --tag="tendermint/tendermint" DOCKER
+	docker build --label=tendermint --tag="tendermint/tendermint" -f DOCKER/Dockerfile .
 	rm -rf DOCKER/tendermint
 .PHONY: build-docker
 
 
 ###############################################################################
-###                       Mocks 											###
+###                                Mocks                                    ###
 ###############################################################################
 
 mockery:
@@ -303,3 +306,23 @@ build-reproducible:
 		--name latest-build cosmossdk/rbuilder:latest
 	docker cp -a latest-build:/home/builder/artifacts/ $(CURDIR)/
 .PHONY: build-reproducible
+
+# Implements test splitting and running. This is pulled directly from
+# the github action workflows for better local reproducibility.
+
+GO_TEST_FILES != find $(CURDIR) -name "*_test.go"
+
+# default to four splits by default
+NUM_SPLIT ?= 4
+
+$(BUILDDIR):
+	mkdir -p $@
+
+# the format statement filters out all packages that don't have tests.
+$(BUILDDIR)/packages.txt:$(GO_TEST_FILES) $(BUILDDIR)
+	go list -f "{{ if .TestGoFiles }}{{ .ImportPath }}{{ end }}" ./... | sort > $@
+
+split-test-packages:$(BUILDDIR)/packages.txt
+	split -d -n l/$(NUM_SPLIT) $< $<.
+test-group-%:split-test-packages
+	cat $(BUILDDIR)/packages.txt.$* | xargs go test -mod=readonly -timeout=15m -race -coverprofile=$(BUILDDIR)/$*.profile.out

README.md

@@ -29,7 +29,7 @@ see our recent paper, "[The latest gossip on BFT consensus](https://arxiv.org/ab
 
 Please do not depend on master as your production branch. Use [releases](https://github.com/tendermint/tendermint/releases) instead.
 
-Tendermint has been in the production of private and public environments, most notably the blockchains of the Cosmos Network. we haven't released v1.0 yet since we are making breaking changes to the protocol and the APIs. 
+Tendermint has been in the production of private and public environments, most notably the blockchains of the Cosmos Network. we haven't released v1.0 yet since we are making breaking changes to the protocol and the APIs.
 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
@@ -37,8 +37,7 @@ contact us [over email](mailto:hello@interchain.berlin) or [join the chat](https
 
 ## Security
 
-To report a security vulnerability, see our [bug bounty
-program](https://hackerone.com/tendermint). 
+To report a security vulnerability, see our [bug bounty program](https://hackerone.com/cosmos).
 For examples of the kinds of bugs we're looking for, see [our security policy](SECURITY.md).
 
 We also maintain a dedicated mailing list for security updates. We will only ever use this mailing list
@@ -61,8 +60,8 @@ 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)
+- [Local cluster using docker-compose](/docs/tools/docker-compose.md)
+- [Remote cluster using Terraform and Ansible](/docs/tools/terraform-and-ansible.md)
 - [Join the Cosmos testnet](https://cosmos.network/testnet)
 
 ## Contributing
@@ -71,7 +70,7 @@ 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), 
+[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).
 
@@ -95,7 +94,7 @@ 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 
+data into the new chain. However, any bump in the PATCH version should be
 compatible with existing blockchain histories.
 
 

UPGRADING.md

@@ -98,7 +98,7 @@ are:
 - `blockchain`
 - `evidence`
 
-Accordingly, the `node` package was changed to reduce access to
+Accordingly, the `node` package changed to reduce access to
 tendermint internals: applications that use tendermint as a library
 will need to change to accommodate these changes. Most notably:
 
@@ -109,6 +109,20 @@ will need to change to accommodate these changes. Most notably:
   longer exported and have been replaced with `node.New` and
   `node.NewDefault` which provide more functional interfaces.
 
+To access any of the functionality previously available via the
+`node.Node` type, use the `*local.Local` "RPC" client, that exposes
+the full RPC interface provided as direct function calls. Import the
+`github.com/tendermint/tendermint/rpc/client/local` package and pass
+the node service as in the following: 
+
+```go
+    node := node.NewDefault() //construct the node object
+    // start and set up the node service 
+
+    client := local.New(node.(local.NodeService))
+    // use client object to interact with the node
+```
+
 ### gRPC Support
 
 Mark gRPC in the RPC layer as deprecated and to be removed in 0.36.

abci/client/client.go

@@ -87,7 +87,7 @@ type ReqRes struct {
 	*sync.WaitGroup
 	*types.Response // Not set atomically, so be sure to use WaitGroup.
 
-	mtx  tmsync.RWMutex
+	mtx  tmsync.Mutex
 	done bool                  // Gets set to true once *after* WaitGroup.Done().
 	cb   func(*types.Response) // A single callback that may be set.
 }
@@ -137,16 +137,16 @@ func (r *ReqRes) InvokeCallback() {
 //
 // ref: https://github.com/tendermint/tendermint/issues/5439
 func (r *ReqRes) GetCallback() func(*types.Response) {
-	r.mtx.RLock()
-	defer r.mtx.RUnlock()
+	r.mtx.Lock()
+	defer r.mtx.Unlock()
 	return r.cb
 }
 
 // SetDone marks the ReqRes object as done.
 func (r *ReqRes) SetDone() {
 	r.mtx.Lock()
-	defer r.mtx.Unlock()
 	r.done = true
+	r.mtx.Unlock()
 }
 
 func waitGroup1() (wg *sync.WaitGroup) {

abci/client/creators.go

@@ -13,7 +13,7 @@ type Creator func() (Client, error)
 // NewLocalCreator returns a Creator for the given app,
 // which will be running locally.
 func NewLocalCreator(app types.Application) Creator {
-	mtx := new(tmsync.RWMutex)
+	mtx := new(tmsync.Mutex)
 
 	return func() (Client, error) {
 		return NewLocalClient(mtx, app), nil

abci/client/grpc_client.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
 
 	"github.com/tendermint/tendermint/abci/types"
 	tmsync "github.com/tendermint/tendermint/internal/libs/sync"
@@ -24,7 +25,7 @@ type grpcClient struct {
 	conn     *grpc.ClientConn
 	chReqRes chan *ReqRes // dispatches "async" responses to callbacks *in order*, needed by mempool
 
-	mtx   tmsync.RWMutex
+	mtx   tmsync.Mutex
 	addr  string
 	err   error
 	resCb func(*types.Request, *types.Response) // listens to all callbacks
@@ -95,7 +96,10 @@ func (cli *grpcClient) OnStart() error {
 
 RETRY_LOOP:
 	for {
-		conn, err := grpc.Dial(cli.addr, grpc.WithInsecure(), grpc.WithContextDialer(dialerFunc))
+		conn, err := grpc.Dial(cli.addr,
+			grpc.WithTransportCredentials(insecure.NewCredentials()),
+			grpc.WithContextDialer(dialerFunc),
+		)
 		if err != nil {
 			if cli.mustConnect {
 				return err
@@ -149,8 +153,8 @@ func (cli *grpcClient) StopForError(err error) {
 }
 
 func (cli *grpcClient) Error() error {
-	cli.mtx.RLock()
-	defer cli.mtx.RUnlock()
+	cli.mtx.Lock()
+	defer cli.mtx.Unlock()
 	return cli.err
 }
 
@@ -158,8 +162,8 @@ func (cli *grpcClient) Error() error {
 // NOTE: callback may get internally generated flush responses.
 func (cli *grpcClient) SetResponseCallback(resCb Callback) {
 	cli.mtx.Lock()
-	defer cli.mtx.Unlock()
 	cli.resCb = resCb
+	cli.mtx.Unlock()
 }
 
 //----------------------------------------

abci/client/local_client.go

@@ -15,7 +15,7 @@ import (
 type localClient struct {
 	service.BaseService
 
-	mtx *tmsync.RWMutex
+	mtx *tmsync.Mutex
 	types.Application
 	Callback
 }
@@ -26,24 +26,22 @@ var _ Client = (*localClient)(nil)
 // methods of the given app.
 //
 // Both Async and Sync methods ignore the given context.Context parameter.
-func NewLocalClient(mtx *tmsync.RWMutex, app types.Application) Client {
+func NewLocalClient(mtx *tmsync.Mutex, app types.Application) Client {
 	if mtx == nil {
-		mtx = &tmsync.RWMutex{}
+		mtx = new(tmsync.Mutex)
 	}
-
 	cli := &localClient{
 		mtx:         mtx,
 		Application: app,
 	}
-
 	cli.BaseService = *service.NewBaseService(nil, "localClient", cli)
 	return cli
 }
 
 func (app *localClient) SetResponseCallback(cb Callback) {
 	app.mtx.Lock()
-	defer app.mtx.Unlock()
 	app.Callback = cb
+	app.mtx.Unlock()
 }
 
 // TODO: change types.Application to include Error()?
@@ -67,8 +65,8 @@ func (app *localClient) EchoAsync(ctx context.Context, msg string) (*ReqRes, err
 }
 
 func (app *localClient) InfoAsync(ctx context.Context, req types.RequestInfo) (*ReqRes, error) {
-	app.mtx.RLock()
-	defer app.mtx.RUnlock()
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
 
 	res := app.Application.Info(req)
 	return app.callback(
@@ -100,8 +98,8 @@ func (app *localClient) CheckTxAsync(ctx context.Context, req types.RequestCheck
 }
 
 func (app *localClient) QueryAsync(ctx context.Context, req types.RequestQuery) (*ReqRes, error) {
-	app.mtx.RLock()
-	defer app.mtx.RUnlock()
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
 
 	res := app.Application.Query(req)
 	return app.callback(
@@ -215,8 +213,8 @@ func (app *localClient) EchoSync(ctx context.Context, msg string) (*types.Respon
 }
 
 func (app *localClient) InfoSync(ctx context.Context, req types.RequestInfo) (*types.ResponseInfo, error) {
-	app.mtx.RLock()
-	defer app.mtx.RUnlock()
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
 
 	res := app.Application.Info(req)
 	return &res, nil
@@ -249,8 +247,8 @@ func (app *localClient) QuerySync(
 	ctx context.Context,
 	req types.RequestQuery,
 ) (*types.ResponseQuery, error) {
-	app.mtx.RLock()
-	defer app.mtx.RUnlock()
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
 
 	res := app.Application.Query(req)
 	return &res, nil

abci/client/socket_client.go

@@ -39,7 +39,7 @@ type socketClient struct {
 
 	reqQueue chan *reqResWithContext
 
-	mtx     tmsync.RWMutex
+	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.
@@ -102,8 +102,8 @@ func (cli *socketClient) OnStop() {
 
 // Error returns an error if the client was stopped abruptly.
 func (cli *socketClient) Error() error {
-	cli.mtx.RLock()
-	defer cli.mtx.RUnlock()
+	cli.mtx.Lock()
+	defer cli.mtx.Unlock()
 	return cli.err
 }
 
@@ -113,8 +113,8 @@ func (cli *socketClient) Error() error {
 // NOTE: callback may get internally generated flush responses.
 func (cli *socketClient) SetResponseCallback(resCb Callback) {
 	cli.mtx.Lock()
-	defer cli.mtx.Unlock()
 	cli.resCb = resCb
+	cli.mtx.Unlock()
 }
 
 //----------------------------------------

abci/example/example_test.go

@@ -13,6 +13,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
 
 	"github.com/tendermint/tendermint/libs/log"
 	tmnet "github.com/tendermint/tendermint/libs/net"
@@ -129,7 +130,7 @@ func dialerFunc(ctx context.Context, addr string) (net.Conn, error) {
 
 func testGRPCSync(t *testing.T, app types.ABCIApplicationServer) {
 	numDeliverTxs := 2000
-	socketFile := fmt.Sprintf("test-%08x.sock", rand.Int31n(1<<30))
+	socketFile := fmt.Sprintf("/tmp/test-%08x.sock", rand.Int31n(1<<30))
 	defer os.Remove(socketFile)
 	socket := fmt.Sprintf("unix://%v", socketFile)
 
@@ -147,7 +148,10 @@ func testGRPCSync(t *testing.T, app types.ABCIApplicationServer) {
 	})
 
 	// Connect to the socket
-	conn, err := grpc.Dial(socket, grpc.WithInsecure(), grpc.WithContextDialer(dialerFunc))
+	conn, err := grpc.Dial(socket,
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithContextDialer(dialerFunc),
+	)
 	if err != nil {
 		t.Fatalf("Error dialing GRPC server: %v", err.Error())
 	}

abci/example/kvstore/kvstore_test.go

@@ -165,7 +165,7 @@ func TestValUpdates(t *testing.T) {
 
 	makeApplyBlock(t, kvstore, 2, diff, tx1, tx2, tx3)
 
-	vals1 = append(vals[:nInit-2], vals[nInit+1]) // nolint: gocritic
+	vals1 = append(vals[:nInit-2], vals[nInit+1])
 	vals2 = kvstore.Validators()
 	valsEqual(t, vals1, vals2)
 
@@ -296,7 +296,7 @@ func TestClientServer(t *testing.T) {
 
 	// set up grpc app
 	kvstore = NewApplication()
-	gclient, gserver, err := makeGRPCClientServer(kvstore, "kvstore-grpc")
+	gclient, gserver, err := makeGRPCClientServer(kvstore, "/tmp/kvstore-grpc")
 	require.NoError(t, err)
 
 	t.Cleanup(func() {

cmd/tendermint/commands/init.go

@@ -121,7 +121,9 @@ func initFilesWithConfig(config *cfg.Config) error {
 	}
 
 	// write config file
-	cfg.WriteConfigFile(config.RootDir, config)
+	if err := cfg.WriteConfigFile(config.RootDir, config); err != nil {
+		return err
+	}
 	logger.Info("Generated config", "mode", config.Mode)
 
 	return nil

cmd/tendermint/commands/reindex_event.go

@@ -3,6 +3,7 @@ package commands
 import (
 	"errors"
 	"fmt"
+	"path/filepath"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -16,6 +17,7 @@ import (
 	"github.com/tendermint/tendermint/internal/state/indexer/sink/kv"
 	"github.com/tendermint/tendermint/internal/state/indexer/sink/psql"
 	"github.com/tendermint/tendermint/internal/store"
+	"github.com/tendermint/tendermint/libs/os"
 	"github.com/tendermint/tendermint/rpc/coretypes"
 	"github.com/tendermint/tendermint/types"
 )
@@ -29,11 +31,12 @@ var ReIndexEventCmd = &cobra.Command{
 	Use:   "reindex-event",
 	Short: "reindex events to the event store backends",
 	Long: `
-	reindex-event is an offline tooling to re-index block and tx events to the eventsinks,
-	you can run this command when the event store backend dropped/disconnected or you want to replace the backend.
-	The default start-height is 0, meaning the tooling will start reindex from the base block height(inclusive); and the
-	default end-height is 0, meaning the tooling will reindex until the latest block height(inclusive). User can omits
-	either or both arguments.
+reindex-event is an offline tooling to re-index block and tx events to the eventsinks,
+you can run this command when the event store backend dropped/disconnected or you want to 
+replace the backend. The default start-height is 0, meaning the tooling will start 
+reindex from the base block height(inclusive); and the default end-height is 0, meaning 
+the tooling will reindex until the latest block height(inclusive). User can omit
+either or both arguments.
 	`,
 	Example: `
 	tendermint reindex-event
@@ -131,6 +134,10 @@ func loadEventSinks(cfg *tmcfg.Config) ([]indexer.EventSink, error) {
 func loadStateAndBlockStore(cfg *tmcfg.Config) (*store.BlockStore, state.Store, error) {
 	dbType := dbm.BackendType(cfg.DBBackend)
 
+	if !os.FileExists(filepath.Join(cfg.DBDir(), "blockstore.db")) {
+		return nil, nil, fmt.Errorf("no blockstore found in %v", cfg.DBDir())
+	}
+
 	// Get BlockStore
 	blockStoreDB, err := dbm.NewDB("blockstore", dbType, cfg.DBDir())
 	if err != nil {
@@ -138,6 +145,10 @@ func loadStateAndBlockStore(cfg *tmcfg.Config) (*store.BlockStore, state.Store,
 	}
 	blockStore := store.NewBlockStore(blockStoreDB)
 
+	if !os.FileExists(filepath.Join(cfg.DBDir(), "state.db")) {
+		return nil, nil, fmt.Errorf("no blockstore found in %v", cfg.DBDir())
+	}
+
 	// Get StateStore
 	stateDB, err := dbm.NewDB("state", dbType, cfg.DBDir())
 	if err != nil {

cmd/tendermint/commands/reindex_event_test.go

@@ -15,6 +15,9 @@ import (
 	"github.com/tendermint/tendermint/internal/state/mocks"
 	prototmstate "github.com/tendermint/tendermint/proto/tendermint/state"
 	"github.com/tendermint/tendermint/types"
+	dbm "github.com/tendermint/tm-db"
+
+	_ "github.com/lib/pq" // for the psql sink
 )
 
 const (
@@ -107,12 +110,29 @@ func TestLoadEventSink(t *testing.T) {
 }
 
 func TestLoadBlockStore(t *testing.T) {
-	bs, ss, err := loadStateAndBlockStore(tmcfg.TestConfig())
+	testCfg, err := tmcfg.ResetTestRoot(t.Name())
+	require.NoError(t, err)
+	testCfg.DBBackend = "goleveldb"
+	_, _, err = loadStateAndBlockStore(testCfg)
+	// we should return an error because the state store and block store
+	// don't yet exist
+	require.Error(t, err)
+
+	dbType := dbm.BackendType(testCfg.DBBackend)
+	bsdb, err := dbm.NewDB("blockstore", dbType, testCfg.DBDir())
+	require.NoError(t, err)
+	bsdb.Close()
+
+	ssdb, err := dbm.NewDB("state", dbType, testCfg.DBDir())
+	require.NoError(t, err)
+	ssdb.Close()
+
+	bs, ss, err := loadStateAndBlockStore(testCfg)
 	require.NoError(t, err)
 	require.NotNil(t, bs)
 	require.NotNil(t, ss)
-
 }
+
 func TestReIndexEvent(t *testing.T) {
 	mockBlockStore := &mocks.BlockStore{}
 	mockStateStore := &mocks.Store{}

cmd/tendermint/commands/rollback.go

@@ -0,0 +1,46 @@
+package commands
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	cfg "github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/internal/state"
+)
+
+var RollbackStateCmd = &cobra.Command{
+	Use:   "rollback",
+	Short: "rollback tendermint state by one height",
+	Long: `
+A state rollback is performed to recover from an incorrect application state transition,
+when Tendermint has persisted an incorrect app hash and is thus unable to make
+progress. Rollback overwrites a state at height n with the state at height n - 1.
+The application should also roll back to height n - 1. No blocks are removed, so upon
+restarting Tendermint the transactions in block n will be re-executed against the
+application.
+`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		height, hash, err := RollbackState(config)
+		if err != nil {
+			return fmt.Errorf("failed to rollback state: %w", err)
+		}
+
+		fmt.Printf("Rolled back state to height %d and hash %X", height, hash)
+		return nil
+	},
+}
+
+// RollbackState takes the state at the current height n and overwrites it with the state
+// at height n - 1. Note state here refers to tendermint state not application state.
+// Returns the latest state height and app hash alongside an error if there was one.
+func RollbackState(config *cfg.Config) (int64, []byte, error) {
+	// use the parsed config to load the block and state store
+	blockStore, stateStore, err := loadStateAndBlockStore(config)
+	if err != nil {
+		return -1, nil, err
+	}
+
+	// rollback the last state
+	return state.Rollback(blockStore, stateStore)
+}

cmd/tendermint/commands/testnet.go

@@ -240,7 +240,9 @@ func testnetFiles(cmd *cobra.Command, args []string) error {
 		}
 		config.Moniker = moniker(i)
 
-		cfg.WriteConfigFile(nodeDir, config)
+		if err := cfg.WriteConfigFile(nodeDir, config); err != nil {
+			return err
+		}
 	}
 
 	fmt.Printf("Successfully initialized %v node directories\n", nValidators+nNonValidators)

cmd/tendermint/main.go

@@ -29,6 +29,7 @@ func main() {
 		cmd.GenNodeKeyCmd,
 		cmd.VersionCmd,
 		cmd.InspectCmd,
+		cmd.RollbackStateCmd,
 		cmd.MakeKeyMigrateCommand(),
 		debug.DebugCmd,
 		cli.NewCompletionCmd(rootCmd, true),

config/config.go

@@ -64,6 +64,9 @@ var (
 
 	defaultNodeKeyPath  = filepath.Join(defaultConfigDir, defaultNodeKeyName)
 	defaultAddrBookPath = filepath.Join(defaultConfigDir, defaultAddrBookName)
+
+	minSubscriptionBufferSize     = 100
+	defaultSubscriptionBufferSize = 200
 )
 
 // Config defines the top level configuration for a Tendermint node
@@ -496,6 +499,29 @@ type RPCConfig struct {
 	// to the estimated maximum number of broadcast_tx_commit calls per block.
 	MaxSubscriptionsPerClient int `mapstructure:"max-subscriptions-per-client"`
 
+	// The number of events that can be buffered per subscription before
+	// returning `ErrOutOfCapacity`.
+	SubscriptionBufferSize int `mapstructure:"experimental-subscription-buffer-size"`
+
+	// The maximum number of responses that can be buffered per WebSocket
+	// client. If clients cannot read from the WebSocket endpoint fast enough,
+	// they will be disconnected, so increasing this parameter may reduce the
+	// chances of them being disconnected (but will cause the node to use more
+	// memory).
+	//
+	// Must be at least the same as `SubscriptionBufferSize`, otherwise
+	// connections may be dropped unnecessarily.
+	WebSocketWriteBufferSize int `mapstructure:"experimental-websocket-write-buffer-size"`
+
+	// If a WebSocket client cannot read fast enough, at present we may
+	// silently drop events instead of generating an error or disconnecting the
+	// client.
+	//
+	// Enabling this parameter will cause the WebSocket connection to be closed
+	// instead if it cannot read fast enough, allowing for greater
+	// predictability in subscription behavior.
+	CloseOnSlowClient bool `mapstructure:"experimental-close-on-slow-client"`
+
 	// How long to wait for a tx to be committed during /broadcast_tx_commit
 	// WARNING: Using a value larger than 10s will result in increasing the
 	// global HTTP write timeout, which applies to all connections and endpoints.
@@ -545,7 +571,9 @@ func DefaultRPCConfig() *RPCConfig {
 
 		MaxSubscriptionClients:    100,
 		MaxSubscriptionsPerClient: 5,
+		SubscriptionBufferSize:    defaultSubscriptionBufferSize,
 		TimeoutBroadcastTxCommit:  10 * time.Second,
+		WebSocketWriteBufferSize:  defaultSubscriptionBufferSize,
 
 		MaxBodyBytes:   int64(1000000), // 1MB
 		MaxHeaderBytes: 1 << 20,        // same as the net/http default
@@ -579,6 +607,18 @@ func (cfg *RPCConfig) ValidateBasic() error {
 	if cfg.MaxSubscriptionsPerClient < 0 {
 		return errors.New("max-subscriptions-per-client can't be negative")
 	}
+	if cfg.SubscriptionBufferSize < minSubscriptionBufferSize {
+		return fmt.Errorf(
+			"experimental-subscription-buffer-size must be >= %d",
+			minSubscriptionBufferSize,
+		)
+	}
+	if cfg.WebSocketWriteBufferSize < cfg.SubscriptionBufferSize {
+		return fmt.Errorf(
+			"experimental-websocket-write-buffer-size must be >= experimental-subscription-buffer-size (%d)",
+			cfg.SubscriptionBufferSize,
+		)
+	}
 	if cfg.TimeoutBroadcastTxCommit < 0 {
 		return errors.New("timeout-broadcast-tx-commit can't be negative")
 	}

config/config_test.go

@@ -138,7 +138,6 @@ func TestBlockSyncConfigValidateBasic(t *testing.T) {
 }
 
 func TestConsensusConfig_ValidateBasic(t *testing.T) {
-	// nolint: lll
 	testcases := map[string]struct {
 		modify    func(*ConsensusConfig)
 		expectErr bool

config/toml.go

@@ -45,23 +45,29 @@ func EnsureRoot(rootDir string) {
 
 // WriteConfigFile renders config using the template and writes it to configFilePath.
 // This function is called by cmd/tendermint/commands/init.go
-func WriteConfigFile(rootDir string, config *Config) {
-	var buffer bytes.Buffer
-
-	if err := configTemplate.Execute(&buffer, config); err != nil {
-		panic(err)
-	}
-
-	configFilePath := filepath.Join(rootDir, defaultConfigFilePath)
-
-	mustWriteFile(configFilePath, buffer.Bytes(), 0644)
+func WriteConfigFile(rootDir string, config *Config) error {
+	return config.WriteToTemplate(filepath.Join(rootDir, defaultConfigFilePath))
 }
 
-func writeDefaultConfigFileIfNone(rootDir string) {
+// WriteToTemplate writes the config to the exact file specified by
+// the path, in the default toml template and does not mangle the path
+// or filename at all.
+func (cfg *Config) WriteToTemplate(path string) error {
+	var buffer bytes.Buffer
+
+	if err := configTemplate.Execute(&buffer, cfg); err != nil {
+		return err
+	}
+
+	return writeFile(path, buffer.Bytes(), 0644)
+}
+
+func writeDefaultConfigFileIfNone(rootDir string) error {
 	configFilePath := filepath.Join(rootDir, defaultConfigFilePath)
 	if !tmos.FileExists(configFilePath) {
-		WriteConfigFile(rootDir, DefaultConfig())
+		return WriteConfigFile(rootDir, DefaultConfig())
 	}
+	return nil
 }
 
 // Note: any changes to the comments/variables/mapstructure
@@ -230,6 +236,33 @@ max-subscription-clients = {{ .RPC.MaxSubscriptionClients }}
 # the estimated # maximum number of broadcast_tx_commit calls per block.
 max-subscriptions-per-client = {{ .RPC.MaxSubscriptionsPerClient }}
 
+# Experimental parameter to specify the maximum number of events a node will
+# buffer, per subscription, before returning an error and closing the
+# subscription. Must be set to at least 100, but higher values will accommodate
+# higher event throughput rates (and will use more memory).
+experimental-subscription-buffer-size = {{ .RPC.SubscriptionBufferSize }}
+
+# Experimental parameter to specify the maximum number of RPC responses that
+# can be buffered per WebSocket client. If clients cannot read from the
+# WebSocket endpoint fast enough, they will be disconnected, so increasing this
+# parameter may reduce the chances of them being disconnected (but will cause
+# the node to use more memory).
+#
+# Must be at least the same as "experimental-subscription-buffer-size",
+# otherwise connections could be dropped unnecessarily. This value should
+# ideally be somewhat higher than "experimental-subscription-buffer-size" to
+# accommodate non-subscription-related RPC responses.
+experimental-websocket-write-buffer-size = {{ .RPC.WebSocketWriteBufferSize }}
+
+# If a WebSocket client cannot read fast enough, at present we may
+# silently drop events instead of generating an error or disconnecting the
+# client.
+#
+# Enabling this experimental parameter will cause the WebSocket connection to
+# be closed instead if it cannot read fast enough, allowing for greater
+# predictability in subscription behavior.
+experimental-close-on-slow-client = {{ .RPC.CloseOnSlowClient }}
+
 # How long to wait for a tx to be committed during /broadcast_tx_commit.
 # WARNING: Using a value larger than 10s will result in increasing the
 # global HTTP write timeout, which applies to all connections and endpoints.
@@ -570,22 +603,22 @@ namespace = "{{ .Instrumentation.Namespace }}"
 
 /****** these are for test settings ***********/
 
-func ResetTestRoot(testName string) *Config {
+func ResetTestRoot(testName string) (*Config, error) {
 	return ResetTestRootWithChainID(testName, "")
 }
 
-func ResetTestRootWithChainID(testName string, chainID string) *Config {
+func ResetTestRootWithChainID(testName string, chainID string) (*Config, error) {
 	// create a unique, concurrency-safe test directory under os.TempDir()
 	rootDir, err := ioutil.TempDir("", fmt.Sprintf("%s-%s_", chainID, testName))
 	if err != nil {
-		panic(err)
+		return nil, err
 	}
 	// ensure config and data subdirs are created
 	if err := tmos.EnsureDir(filepath.Join(rootDir, defaultConfigDir), DefaultDirPerm); err != nil {
-		panic(err)
+		return nil, err
 	}
 	if err := tmos.EnsureDir(filepath.Join(rootDir, defaultDataDir), DefaultDirPerm); err != nil {
-		panic(err)
+		return nil, err
 	}
 
 	conf := DefaultConfig()
@@ -594,26 +627,36 @@ func ResetTestRootWithChainID(testName string, chainID string) *Config {
 	privStateFilePath := filepath.Join(rootDir, conf.PrivValidator.State)
 
 	// Write default config file if missing.
-	writeDefaultConfigFileIfNone(rootDir)
+	if err := writeDefaultConfigFileIfNone(rootDir); err != nil {
+		return nil, err
+	}
+
 	if !tmos.FileExists(genesisFilePath) {
 		if chainID == "" {
 			chainID = "tendermint_test"
 		}
 		testGenesis := fmt.Sprintf(testGenesisFmt, chainID)
-		mustWriteFile(genesisFilePath, []byte(testGenesis), 0644)
+		if err := writeFile(genesisFilePath, []byte(testGenesis), 0644); err != nil {
+			return nil, err
+		}
 	}
 	// we always overwrite the priv val
-	mustWriteFile(privKeyFilePath, []byte(testPrivValidatorKey), 0644)
-	mustWriteFile(privStateFilePath, []byte(testPrivValidatorState), 0644)
+	if err := writeFile(privKeyFilePath, []byte(testPrivValidatorKey), 0644); err != nil {
+		return nil, err
+	}
+	if err := writeFile(privStateFilePath, []byte(testPrivValidatorState), 0644); err != nil {
+		return nil, err
+	}
 
 	config := TestConfig().SetRoot(rootDir)
-	return config
+	return config, nil
 }
 
-func mustWriteFile(filePath string, contents []byte, mode os.FileMode) {
+func writeFile(filePath string, contents []byte, mode os.FileMode) error {
 	if err := ioutil.WriteFile(filePath, contents, mode); err != nil {
-		tmos.Exit(fmt.Sprintf("failed to write file: %v", err))
+		return fmt.Errorf("failed to write file: %w", err)
 	}
+	return nil
 }
 
 var testGenesisFmt = `{

config/toml_test.go

@@ -24,17 +24,17 @@ func TestEnsureRoot(t *testing.T) {
 
 	// setup temp dir for test
 	tmpDir, err := ioutil.TempDir("", "config-test")
-	require.Nil(err)
+	require.NoError(err)
 	defer os.RemoveAll(tmpDir)
 
 	// create root dir
 	EnsureRoot(tmpDir)
 
-	WriteConfigFile(tmpDir, DefaultConfig())
+	require.NoError(WriteConfigFile(tmpDir, DefaultConfig()))
 
 	// make sure config is set properly
 	data, err := ioutil.ReadFile(filepath.Join(tmpDir, defaultConfigFilePath))
-	require.Nil(err)
+	require.NoError(err)
 
 	checkConfig(t, string(data))
 
@@ -47,7 +47,8 @@ func TestEnsureTestRoot(t *testing.T) {
 	testName := "ensureTestRoot"
 
 	// create root dir
-	cfg := ResetTestRoot(testName)
+	cfg, err := ResetTestRoot(testName)
+	require.NoError(err)
 	defer os.RemoveAll(cfg.RootDir)
 	rootDir := cfg.RootDir
 

crypto/secp256k1/secp256k1_nocgo.go

@@ -1,3 +1,4 @@
+//go:build !libsecp256k1
 // +build !libsecp256k1
 
 package secp256k1

docs/.vuepress/config.js

@@ -34,6 +34,10 @@ module.exports = {
         "label": "v0.34",
         "key": "v0.34"
       },
+      {
+        "label": "v0.35",
+        "key": "v0.35"
+      },
       {
         "label": "master",
         "key": "master"

docs/networks/docker-compose.md

@@ -169,7 +169,7 @@ Override the [command](https://github.com/tendermint/tendermint/blob/master/netw
         ipv4_address: 192.167.10.2
 ```
 
-Similarly do for node1, node2 and node3 then [run testnet](https://github.com/tendermint/tendermint/blob/master/docs/networks/docker-compose.md#run-a-testnet)
+Similarly do for node1, node2 and node3 then [run testnet](#run-a-testnet).
 
 ## Logging
 

docs/nodes/metrics.md

@@ -20,6 +20,7 @@ The following metrics are available:
 
 | **Name**                               | **Type**  | **Tags**      | **Description**                                                        |
 | -------------------------------------- | --------- | ------------- | ---------------------------------------------------------------------- |
+| abci_connection_method_timing          | Histogram | method, type  | Timings for each of the ABCI methods                                   |
 | consensus_height                       | Gauge     |               | Height of the chain                                                    |
 | consensus_validators                   | Gauge     |               | Number of validators                                                   |
 | consensus_validators_power             | Gauge     |               | Total voting power of all validators                                   |
@@ -55,6 +56,16 @@ The following metrics are available:
 
 Percentage of missing + byzantine validators:
 
-```md
-((consensus\_byzantine\_validators\_power + consensus\_missing\_validators\_power) / consensus\_validators\_power) * 100
+```prometheus
+((consensus_byzantine_validators_power + consensus_missing_validators_power) / consensus_validators_power) * 100
+```
+
+Rate at which the application is responding to each ABCI method call.
+```
+sum(rate(tendermint_abci_connection_method_timing_count[5m])) by (method)
+```
+
+The 95th percentile response time for the application to the `deliver_tx` ABCI method call.
+```
+histogram_quantile(0.95, sum by(le) (rate(tendermint_abci_connection_method_timing_bucket{method="deliver_tx"}[5m])))
 ```

docs/roadmap/README.md

@@ -0,0 +1,6 @@
+---
+order: false
+parent:
+  title: Roadmap
+  order: 7
+---

docs/roadmap/roadmap.md

@@ -0,0 +1,97 @@
+---
+order: 1
+---
+
+# Tendermint Roadmap
+
+*Last Updated: Friday 8 October 2021*
+
+This document endeavours to inform the wider Tendermint community about development plans and priorities for Tendermint Core, and when we expect features to be delivered. It is intended to broadly inform all users of Tendermint, including application developers, node operators, integrators, and the engineering and research teams.
+
+Anyone wishing to propose work to be a part of this roadmap should do so by opening an [issue](https://github.com/tendermint/spec/issues/new/choose) in the spec. Bug reports and other implementation concerns should be brought up in the [core repository](https://github.com/tendermint/tendermint).
+
+This roadmap should be read as a high-level guide to plans and priorities, rather than a commitment to schedules and deliverables. Features earlier on the roadmap will generally be more specific and detailed than those later on. We will update this document periodically to reflect the current status.
+
+The upgrades are split into two components: **Epics**, the features that define a release and to a large part dictate the timing of releases; and **minors**, features of smaller scale and lower priority, that could land in neighboring releases.
+
+## V0.35 (completed Q3 2021)
+
+### Prioritized Mempool
+
+Transactions were previously added to blocks in the order with which they arrived to the mempool. Adding a priority field via `CheckTx` gives applications more control over which transactions make it into a block. This is important in the presence of transaction fees. [More](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-067-mempool-refactor.md)
+
+### Refactor of the P2P Framework
+
+The Tendermint P2P system is undergoing a large redesign to improve its performance and reliability. The first phase of this redesign is included in 0.35. This phase cleans and decouples abstractions, improves peer lifecycle management, peer address handling and enables pluggable transports. It is implemented to be protocol-compatible with the previous implementation. [More](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-062-p2p-architecture.md)
+
+### State Sync Improvements
+
+Following the initial version of state sync, several improvements have been made. These include the addition of [Reverse Sync](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-068-reverse-sync.md) needed for evidence handling, the introduction of a [P2P State Provider](https://github.com/tendermint/tendermint/pull/6807) as an alternative to RPC endpoints, new configuration parameters to adjust throughput, and several bug fixes.
+
+### Custom event indexing + PSQL Indexer
+
+Added a new `EventSink` interface to allow alternatives to Tendermint's proprietary transaction indexer. We also added a PostgreSQL Indexer implementation, allowing rich SQL-based index queries. [More](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-065-custom-event-indexing.md)
+
+### Minor Works
+
+- Several Go packages were reorganized to make the distinction between public APIs and implementation details more clear.
+- Block indexer to index begin-block and end-block events. [More](https://github.com/tendermint/tendermint/pull/6226)
+- Block, state, evidence, and light storage keys were reworked to preserve lexicographic order. This change requires a database migration. [More](https://github.com/tendermint/tendermint/pull/5771)
+- Introduciton of Tendermint modes. Part of this change includes the possibility to run a separate seed node that runs the PEX reactor only. [More](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-052-tendermint-mode.md)
+
+## V0.36 (expected Q1 2022)
+
+### ABCI++
+
+An overhaul of the existing interface between the application and consensus, to give the application more control over block construction. ABCI++ adds new hooks allowing modification of transactions before they get into a block, verification of a block before voting, injection of signed information into votes, and more compact delivery of blocks after agreement (to allow for concurrent execution). [More](https://github.com/tendermint/spec/blob/master/rfc/004-abci%2B%2B.md)
+
+### Proposer-Based Timestamps
+
+Proposer-based timestamps are a replacement of [BFT time](https://docs.tendermint.com/master/spec/consensus/bft-time.html), whereby the proposer chooses a timestamp and validators vote on the block only if the timestamp is considered *timely*. This increases reliance on an accurate local clock, but in exchange makes block time more reliable and resistant to faults. This has important use cases in light clients, IBC relayers, CosmosHub inflation and enabling signature aggregation. [More](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-071-proposer-based-timestamps.md)
+
+### Soft Upgrades
+
+We are working on a suite of tools and patterns to make it easier for both node operators and application developers to quickly and safely upgrade to newer versions of Tendermint. [More](https://github.com/tendermint/spec/pull/222)
+
+### Minor Works
+
+- Remove the "legacy" P2P framework, and clean up of P2P package. [More](https://github.com/tendermint/tendermint/issues/5670)
+- Remove the global mutex from the local ABCI client to enable application-controlled concurrency. [More](https://github.com/tendermint/tendermint/issues/7073)
+- Enable P2P support for light clients
+- Node orchestration of services + Node initialization and composibility
+- Remove redundancy in several data structures. Remove unused components such as the block sync v2 reactor, gRPC in the RPC layer, and the socket-based remote signer.
+- Improve node visibility by introducing more metrics
+
+## V0.37 (expected Q3 2022)
+
+### Complete P2P Refactor
+
+Finish the final phase of the P2P system. Ongoing research and planning is taking place to decide whether to adopt [libp2p](https://libp2p.io/), alternative transports to `MConn` such as [QUIC](https://en.wikipedia.org/wiki/QUIC) and handshake/authentication protocols such as [Noise](https://noiseprotocol.org/). Research into more advanced gossiping techniques.
+
+### Streamline Storage Engine
+
+Tendermint currently has an abstraction to allow support for multiple database backends. This generality incurs maintenance overhead and interferes with application-specific optimizations that Tendermint could use (ACID guarantees, etc.). We plan to converge on a single database and streamline the Tendermint storage engine. [More](https://github.com/tendermint/tendermint/pull/6897)
+
+### Evaluate Interprocess Communication
+
+Tendermint nodes currently have multiple areas of communication with other processes (ABCI, remote-signer, P2P, JSONRPC, websockets, events as examples). Many of these have multiple implementations in which a single suffices. Consolidate and clean up IPC. [More](https://github.com/tendermint/tendermint/blob/master/docs/rfc/rfc-002-ipc-ecosystem.md)
+
+### Minor Works
+
+- Amnesia attack handling. [More](https://github.com/tendermint/tendermint/issues/5270)
+- Remove / Update Consensus WAL. [More](https://github.com/tendermint/tendermint/issues/6397)
+- Signature Aggregation. [More](https://github.com/tendermint/tendermint/issues/1319)
+- Remove gogoproto dependency. [More](https://github.com/tendermint/tendermint/issues/5446)
+
+## V1.0 (expected Q4 2022)
+
+Has the same feature set as V0.37 but with a focus towards testing, protocol correctness and minor tweaks to ensure a stable product. Such work might include extending the [consensus testing framework](https://github.com/tendermint/tendermint/issues/5920), the use of canary/long-lived testnets and greater integration tests.
+
+## Post 1.0 Work
+
+- Improved block propagation with erasure coding and/or compact blocks. [More](https://github.com/tendermint/spec/issues/347)
+- Consensus engine refactor
+- Bidirectional ABCI
+- Randomized Leader Election
+- ZK proofs / other cryptographic primitives
+- Multichain Tendermint

docs/tendermint-core/README.md

@@ -14,7 +14,12 @@ This section dives into the internals of Go-Tendermint.
 - [Subscribing to events](./subscription.md)
 - [Block Structure](./block-structure.md)
 - [RPC](./rpc.md)
-- [Block Sync](./block-sync.md)
-- [State Sync](./state-sync.md)
-- [Mempool](./mempool.md)
+- [Block Sync](./block-sync/README.md)
+- [State Sync](./state-sync/README.md)
+- [Mempool](./mempool/README.md)
 - [Light Client](./light-client.md)
+- [Consensus](./consensus/README.md)
+- [Peer Exachange (PEX)](./pex/README.md)
+- [Evidence](./evidence/README.md)
+
+For full specifications refer to the [spec repo](https://github.com/tendermint/spec).

docs/tendermint-core/block-sync/README.md

@@ -1,7 +1,11 @@
 ---
-order: 10
+order: 1
+parent:
+  title: Block Sync
+  order: 6
 ---
 
+
 # Block Sync
 *Formerly known as Fast Sync*
 
@@ -61,3 +65,7 @@ another event for exposing the fast-sync `complete` status and the state `height
 
 The user can query the events by subscribing `EventQueryBlockSyncStatus`
 Please check [types](https://pkg.go.dev/github.com/tendermint/tendermint/types?utm_source=godoc#pkg-constants) for the details.
+
+## Implementation
+
+To read more on the implamentation please see the [reactor doc](./reactor.md) and the [implementation doc](./implementation.md)

docs/tendermint-core/block-sync/implementation.md

@@ -0,0 +1,47 @@
+---
+order: 3
+---
+
+# Implementation
+
+## Blocksync Reactor
+
+- coordinates the pool for syncing
+- coordinates the store for persistence
+- coordinates the playing of blocks towards the app using a sm.BlockExecutor
+- handles switching between fastsync and consensus
+- it is a p2p.BaseReactor
+- starts the pool.Start() and its poolRoutine()
+- registers all the concrete types and interfaces for serialisation
+
+### poolRoutine
+
+- listens to these channels:
+    - pool requests blocks from a specific peer by posting to requestsCh, block reactor then sends
+    a &bcBlockRequestMessage for a specific height
+    - pool signals timeout of a specific peer by posting to timeoutsCh
+    - switchToConsensusTicker to periodically try and switch to consensus
+    - trySyncTicker to periodically check if we have fallen behind and then catch-up sync
+        - if there aren't any new blocks available on the pool it skips syncing
+- tries to sync the app by taking downloaded blocks from the pool, gives them to the app and stores
+  them on disk
+- implements Receive which is called by the switch/peer
+    - calls AddBlock on the pool when it receives a new block from a peer
+
+## Block Pool
+
+- responsible for downloading blocks from peers
+- makeRequestersRoutine()
+    - removes timeout peers
+    - starts new requesters by calling makeNextRequester()
+- requestRoutine():
+    - picks a peer and sends the request, then blocks until:
+        - pool is stopped by listening to pool.Quit
+        - requester is stopped by listening to Quit
+        - request is redone
+        - we receive a block
+            - gotBlockCh is strange
+
+## Go Routines in Blocksync Reactor
+
+![Go Routines Diagram](img/bc-reactor-routines.png)

docs/tendermint-core/block-sync/reactor.md

@@ -0,0 +1,278 @@
+---
+order: 2
+---
+# Reactor
+
+The Blocksync Reactor's high level responsibility is to enable peers who are
+far behind the current state of the consensus to quickly catch up by downloading
+many blocks in parallel, verifying their commits, and executing them against the
+ABCI application.
+
+Tendermint full nodes run the Blocksync Reactor as a service to provide blocks
+to new nodes. New nodes run the Blocksync Reactor in "fast_sync" mode,
+where they actively make requests for more blocks until they sync up.
+Once caught up, "fast_sync" mode is disabled and the node switches to
+using (and turns on) the Consensus Reactor.
+
+## Architecture and algorithm
+
+The Blocksync reactor is organised as a set of concurrent tasks:
+
+- Receive routine of Blocksync Reactor
+- Task for creating Requesters
+- Set of Requesters tasks and - Controller task.
+
+![Blocksync Reactor Architecture Diagram](img/bc-reactor.png)
+
+### Data structures
+
+These are the core data structures necessarily to provide the Blocksync Reactor logic.
+
+Requester data structure is used to track assignment of request for `block` at position `height` to a peer with id equals to `peerID`.
+
+```go
+type Requester {
+  mtx          Mutex
+  block        Block
+  height       int64
+  peerID       p2p.ID
+  redoChannel  chan p2p.ID //redo may send multi-time; peerId is used to identify repeat
+}
+```
+
+Pool is a core data structure that stores last executed block (`height`), assignment of requests to peers (`requesters`), current height for each peer and number of pending requests for each peer (`peers`), maximum peer height, etc.
+
+```go
+type Pool {
+  mtx                Mutex
+  requesters         map[int64]*Requester
+  height             int64
+  peers              map[p2p.ID]*Peer
+  maxPeerHeight      int64
+  numPending         int32
+  store              BlockStore
+  requestsChannel    chan<- BlockRequest
+  errorsChannel      chan<- peerError
+}
+```
+
+Peer data structure stores for each peer current `height` and number of pending requests sent to the peer (`numPending`), etc.
+
+```go
+type Peer struct {
+  id           p2p.ID
+  height       int64
+  numPending   int32
+  timeout      *time.Timer
+  didTimeout   bool
+}
+```
+
+BlockRequest is internal data structure used to denote current mapping of request for a block at some `height` to a peer (`PeerID`).
+
+```go
+type BlockRequest {
+  Height int64
+  PeerID p2p.ID
+}
+```
+
+### Receive routine of Blocksync Reactor
+
+It is executed upon message reception on the BlocksyncChannel inside p2p receive routine. There is a separate p2p receive routine (and therefore receive routine of the Blocksync Reactor) executed for each peer. Note that try to send will not block (returns immediately) if outgoing buffer is full.
+
+```go
+handleMsg(pool, m):
+    upon receiving bcBlockRequestMessage m from peer p:
+      block = load block for height m.Height from pool.store
+      if block != nil then
+        try to send BlockResponseMessage(block) to p
+      else
+        try to send bcNoBlockResponseMessage(m.Height) to p
+
+    upon receiving bcBlockResponseMessage m from peer p:
+      pool.mtx.Lock()
+      requester = pool.requesters[m.Height]
+      if requester == nil then
+        error("peer sent us a block we didn't expect")
+        continue
+
+      if requester.block == nil and requester.peerID == p then
+        requester.block = m
+        pool.numPending -= 1  // atomic decrement
+        peer = pool.peers[p]
+        if peer != nil then
+          peer.numPending--
+          if peer.numPending == 0 then
+            peer.timeout.Stop()
+            // NOTE: we don't send Quit signal to the corresponding requester task!
+        else
+          trigger peer timeout to expire after peerTimeout
+      pool.mtx.Unlock()
+
+
+    upon receiving bcStatusRequestMessage m from peer p:
+      try to send bcStatusResponseMessage(pool.store.Height)
+
+    upon receiving bcStatusResponseMessage m from peer p:
+      pool.mtx.Lock()
+      peer = pool.peers[p]
+      if peer != nil then
+        peer.height = m.height
+      else
+        peer = create new Peer data structure with id = p and height = m.Height
+        pool.peers[p] = peer
+
+      if m.Height > pool.maxPeerHeight then
+        pool.maxPeerHeight = m.Height
+      pool.mtx.Unlock()
+
+onTimeout(p):
+  send error message to pool error channel
+  peer = pool.peers[p]
+  peer.didTimeout = true
+```
+
+### Requester tasks
+
+Requester task is responsible for fetching a single block at position `height`.
+
+```go
+fetchBlock(height, pool):
+  while true do {
+    peerID = nil
+    block = nil
+    peer = pickAvailablePeer(height)
+    peerID = peer.id
+
+    enqueue BlockRequest(height, peerID) to pool.requestsChannel
+    redo = false
+    while !redo do
+      select {
+        upon receiving Quit message do
+          return
+        upon receiving redo message with id on redoChannel do
+          if peerID == id {
+            mtx.Lock()
+            pool.numPending++
+            redo = true
+            mtx.UnLock()
+          }
+      }
+    }
+
+pickAvailablePeer(height):
+  selectedPeer = nil
+  while selectedPeer = nil do
+    pool.mtx.Lock()
+    for each peer in pool.peers do
+      if !peer.didTimeout and peer.numPending < maxPendingRequestsPerPeer and peer.height >= height then
+        peer.numPending++
+        selectedPeer = peer
+        break
+    pool.mtx.Unlock()
+
+    if selectedPeer = nil then
+      sleep requestIntervalMS
+
+  return selectedPeer
+```
+
+sleep for requestIntervalMS
+
+### Task for creating Requesters
+
+This task is responsible for continuously creating and starting Requester tasks.
+
+```go
+createRequesters(pool):
+  while true do
+    if !pool.isRunning then break
+    if pool.numPending < maxPendingRequests or size(pool.requesters) < maxTotalRequesters then
+      pool.mtx.Lock()
+      nextHeight = pool.height + size(pool.requesters)
+      requester = create new requester for height nextHeight
+      pool.requesters[nextHeight] = requester
+      pool.numPending += 1 // atomic increment
+      start requester task
+      pool.mtx.Unlock()
+    else
+      sleep requestIntervalMS
+      pool.mtx.Lock()
+      for each peer in pool.peers do
+        if !peer.didTimeout && peer.numPending > 0 && peer.curRate < minRecvRate then
+          send error on pool error channel
+          peer.didTimeout = true
+        if peer.didTimeout then
+          for each requester in pool.requesters do
+            if requester.getPeerID() == peer then
+              enqueue msg on requestor's redoChannel
+          delete(pool.peers, peerID)
+      pool.mtx.Unlock()
+```
+
+### Main blocksync reactor controller task
+
+```go
+main(pool):
+  create trySyncTicker with interval trySyncIntervalMS
+  create statusUpdateTicker with interval statusUpdateIntervalSeconds
+  create switchToConsensusTicker with interval switchToConsensusIntervalSeconds
+
+  while true do
+    select {
+   upon receiving BlockRequest(Height, Peer) on pool.requestsChannel:
+     try to send bcBlockRequestMessage(Height) to Peer
+
+   upon receiving error(peer) on errorsChannel:
+     stop peer for error
+
+   upon receiving message on statusUpdateTickerChannel:
+     broadcast bcStatusRequestMessage(bcR.store.Height) // message sent in a separate routine
+
+   upon receiving message on switchToConsensusTickerChannel:
+     pool.mtx.Lock()
+     receivedBlockOrTimedOut = pool.height > 0 || (time.Now() - pool.startTime) > 5 Seconds
+     ourChainIsLongestAmongPeers = pool.maxPeerHeight == 0 || pool.height >= pool.maxPeerHeight
+     haveSomePeers = size of pool.peers > 0
+     pool.mtx.Unlock()
+     if haveSomePeers && receivedBlockOrTimedOut && ourChainIsLongestAmongPeers then
+       switch to consensus mode
+
+          upon receiving message on trySyncTickerChannel:
+            for i = 0; i < 10; i++ do
+              pool.mtx.Lock()
+              firstBlock = pool.requesters[pool.height].block
+              secondBlock = pool.requesters[pool.height].block
+              if firstBlock == nil or secondBlock == nil then continue
+              pool.mtx.Unlock()
+              verify firstBlock using LastCommit from secondBlock
+              if verification failed
+                pool.mtx.Lock()
+                peerID = pool.requesters[pool.height].peerID
+                redoRequestsForPeer(peerId)
+                delete(pool.peers, peerID)
+                stop peer peerID for error
+                pool.mtx.Unlock()
+              else
+                delete(pool.requesters, pool.height)
+                save firstBlock to store
+                pool.height++
+                execute firstBlock
+    }
+
+redoRequestsForPeer(pool, peerId):
+  for each requester in pool.requesters do
+    if requester.getPeerID() == peerID
+     enqueue msg on redoChannel for requester
+```
+
+## Channels
+
+Defines `maxMsgSize` for the maximum size of incoming messages,
+`SendQueueCapacity` and `RecvBufferCapacity` for maximum sending and
+receiving buffers respectively. These are supposed to prevent amplification
+attacks by setting up the upper limit on how much data we can receive & send to
+a peer.
+
+Sending incorrectly encoded data will result in stopping the peer.

docs/tendermint-core/consensus/README.md

@@ -0,0 +1,42 @@
+---
+order: 1
+parent:
+  title: Consensus
+  order: 6
+---
+
+# Consensus
+
+Tendermint Consensus is a distributed protocol executed by validator processes to agree on
+the next block to be added to the Tendermint blockchain. The protocol proceeds in rounds, where
+each round is a try to reach agreement on the next block. A round starts by having a dedicated
+process (called proposer) suggesting to other processes what should be the next block with
+the `ProposalMessage`.
+The processes respond by voting for a block with `VoteMessage` (there are two kinds of vote
+messages, prevote and precommit votes). Note that a proposal message is just a suggestion what the
+next block should be; a validator might vote with a `VoteMessage` for a different block. If in some
+round, enough number of processes vote for the same block, then this block is committed and later
+added to the blockchain. `ProposalMessage` and `VoteMessage` are signed by the private key of the
+validator. The internals of the protocol and how it ensures safety and liveness properties are
+explained in a forthcoming document.
+
+For efficiency reasons, validators in Tendermint consensus protocol do not agree directly on the
+block as the block size is big, i.e., they don't embed the block inside `Proposal` and
+`VoteMessage`. Instead, they reach agreement on the `BlockID` (see `BlockID` definition in
+[Blockchain](https://github.com/tendermint/spec/blob/master/spec/core/data_structures.md#blockid) section)
+that uniquely identifies each block. The block itself is
+disseminated to validator processes using peer-to-peer gossiping protocol. It starts by having a
+proposer first splitting a block into a number of block parts, that are then gossiped between
+processes using `BlockPartMessage`.
+
+Validators in Tendermint communicate by peer-to-peer gossiping protocol. Each validator is connected
+only to a subset of processes called peers. By the gossiping protocol, a validator send to its peers
+all needed information (`ProposalMessage`, `VoteMessage` and `BlockPartMessage`) so they can
+reach agreement on some block, and also obtain the content of the chosen block (block parts). As
+part of the gossiping protocol, processes also send auxiliary messages that inform peers about the
+executed steps of the core consensus algorithm (`NewRoundStepMessage` and `NewValidBlockMessage`), and
+also messages that inform peers what votes the process has seen (`HasVoteMessage`,
+`VoteSetMaj23Message` and `VoteSetBitsMessage`). These messages are then used in the gossiping
+protocol to determine what messages a process should send to its peers.
+
+We now describe the content of each message exchanged during Tendermint consensus protocol.

docs/tendermint-core/consensus/reactor.md

@@ -0,0 +1,370 @@
+---
+order: 2
+---
+
+# Reactor
+
+Consensus Reactor defines a reactor for the consensus service. It contains the ConsensusState service that
+manages the state of the Tendermint consensus internal state machine.
+When Consensus Reactor is started, it starts Broadcast Routine which starts ConsensusState service.
+Furthermore, for each peer that is added to the Consensus Reactor, it creates (and manages) the known peer state
+(that is used extensively in gossip routines) and starts the following three routines for the peer p:
+Gossip Data Routine, Gossip Votes Routine and QueryMaj23Routine. Finally, Consensus Reactor is responsible
+for decoding messages received from a peer and for adequate processing of the message depending on its type and content.
+The processing normally consists of updating the known peer state and for some messages
+(`ProposalMessage`, `BlockPartMessage` and `VoteMessage`) also forwarding message to ConsensusState module
+for further processing. In the following text we specify the core functionality of those separate unit of executions
+that are part of the Consensus Reactor.
+
+## ConsensusState service
+
+Consensus State handles execution of the Tendermint BFT consensus algorithm. It processes votes and proposals,
+and upon reaching agreement, commits blocks to the chain and executes them against the application.
+The internal state machine receives input from peers, the internal validator and from a timer.
+
+Inside Consensus State we have the following units of execution: Timeout Ticker and Receive Routine.
+Timeout Ticker is a timer that schedules timeouts conditional on the height/round/step that are processed
+by the Receive Routine.
+
+### Receive Routine of the ConsensusState service
+
+Receive Routine of the ConsensusState handles messages which may cause internal consensus state transitions.
+It is the only routine that updates RoundState that contains internal consensus state.
+Updates (state transitions) happen on timeouts, complete proposals, and 2/3 majorities.
+It receives messages from peers, internal validators and from Timeout Ticker
+and invokes the corresponding handlers, potentially updating the RoundState.
+The details of the protocol (together with formal proofs of correctness) implemented by the Receive Routine are
+discussed in separate document. For understanding of this document
+it is sufficient to understand that the Receive Routine manages and updates RoundState data structure that is
+then extensively used by the gossip routines to determine what information should be sent to peer processes.
+
+## Round State
+
+RoundState defines the internal consensus state. It contains height, round, round step, a current validator set,
+a proposal and proposal block for the current round, locked round and block (if some block is being locked), set of
+received votes and last commit and last validators set.
+
+```go
+type RoundState struct {
+ Height             int64
+ Round              int
+ Step               RoundStepType
+ Validators         ValidatorSet
+ Proposal           Proposal
+ ProposalBlock      Block
+ ProposalBlockParts PartSet
+ LockedRound        int
+ LockedBlock        Block
+ LockedBlockParts   PartSet
+ Votes              HeightVoteSet
+ LastCommit         VoteSet
+ LastValidators     ValidatorSet
+}
+```
+
+Internally, consensus will run as a state machine with the following states:
+
+- RoundStepNewHeight
+- RoundStepNewRound
+- RoundStepPropose
+- RoundStepProposeWait
+- RoundStepPrevote
+- RoundStepPrevoteWait
+- RoundStepPrecommit
+- RoundStepPrecommitWait
+- RoundStepCommit
+
+## Peer Round State
+
+Peer round state contains the known state of a peer. It is being updated by the Receive routine of
+Consensus Reactor and by the gossip routines upon sending a message to the peer.
+
+```golang
+type PeerRoundState struct {
+ Height                   int64               // Height peer is at
+ Round                    int                 // Round peer is at, -1 if unknown.
+ Step                     RoundStepType       // Step peer is at
+ Proposal                 bool                // True if peer has proposal for this round
+ ProposalBlockPartsHeader PartSetHeader
+ ProposalBlockParts       BitArray
+ ProposalPOLRound         int                 // Proposal's POL round. -1 if none.
+ ProposalPOL              BitArray            // nil until ProposalPOLMessage received.
+ Prevotes                 BitArray            // All votes peer has for this round
+ Precommits               BitArray            // All precommits peer has for this round
+ LastCommitRound          int                 // Round of commit for last height. -1 if none.
+ LastCommit               BitArray            // All commit precommits of commit for last height.
+ CatchupCommitRound       int                 // Round that we have commit for. Not necessarily unique. -1 if none.
+ CatchupCommit            BitArray            // All commit precommits peer has for this height & CatchupCommitRound
+}
+```
+
+## Receive method of Consensus reactor
+
+The entry point of the Consensus reactor is a receive method. When a message is
+received from a peer p, normally the peer round state is updated
+correspondingly, and some messages are passed for further processing, for
+example to ConsensusState service. We now specify the processing of messages in
+the receive method of Consensus reactor for each message type. In the following
+message handler, `rs` and `prs` denote `RoundState` and `PeerRoundState`,
+respectively.
+
+### NewRoundStepMessage handler
+
+```go
+handleMessage(msg):
+    if msg is from smaller height/round/step then return
+    // Just remember these values.
+    prsHeight = prs.Height
+    prsRound = prs.Round
+    prsCatchupCommitRound = prs.CatchupCommitRound
+    prsCatchupCommit = prs.CatchupCommit
+
+    Update prs with values from msg
+    if prs.Height or prs.Round has been updated then
+        reset Proposal related fields of the peer state
+    if prs.Round has been updated and msg.Round == prsCatchupCommitRound then
+        prs.Precommits = psCatchupCommit
+    if prs.Height has been updated then
+        if prsHeight+1 == msg.Height && prsRound == msg.LastCommitRound then
+            prs.LastCommitRound = msg.LastCommitRound
+         prs.LastCommit = prs.Precommits
+        } else {
+            prs.LastCommitRound = msg.LastCommitRound
+         prs.LastCommit = nil
+        }
+        Reset prs.CatchupCommitRound and prs.CatchupCommit
+```
+
+### NewValidBlockMessage handler
+
+```go
+handleMessage(msg):
+    if prs.Height != msg.Height then return
+
+    if prs.Round != msg.Round && !msg.IsCommit then return
+
+    prs.ProposalBlockPartsHeader = msg.BlockPartsHeader
+    prs.ProposalBlockParts = msg.BlockParts
+```
+
+The number of block parts is limited to 1601 (`types.MaxBlockPartsCount`) to
+protect the node against DOS attacks.
+
+### HasVoteMessage handler
+
+```go
+handleMessage(msg):
+    if prs.Height == msg.Height then
+        prs.setHasVote(msg.Height, msg.Round, msg.Type, msg.Index)
+```
+
+### VoteSetMaj23Message handler
+
+```go
+handleMessage(msg):
+    if prs.Height == msg.Height then
+        Record in rs that a peer claim to have ⅔ majority for msg.BlockID
+        Send VoteSetBitsMessage showing votes node has for that BlockId
+```
+
+### ProposalMessage handler
+
+```go
+handleMessage(msg):
+    if prs.Height != msg.Height || prs.Round != msg.Round || prs.Proposal then return
+    prs.Proposal = true
+    if prs.ProposalBlockParts == empty set then // otherwise it is set in NewValidBlockMessage handler
+      prs.ProposalBlockPartsHeader = msg.BlockPartsHeader
+    prs.ProposalPOLRound = msg.POLRound
+    prs.ProposalPOL = nil
+    Send msg through internal peerMsgQueue to ConsensusState service
+```
+
+### ProposalPOLMessage handler
+
+```go
+handleMessage(msg):
+    if prs.Height != msg.Height or prs.ProposalPOLRound != msg.ProposalPOLRound then return
+    prs.ProposalPOL = msg.ProposalPOL
+```
+
+The number of votes is limited to 10000 (`types.MaxVotesCount`) to protect the
+node against DOS attacks.
+
+### BlockPartMessage handler
+
+```go
+handleMessage(msg):
+    if prs.Height != msg.Height || prs.Round != msg.Round then return
+    Record in prs that peer has block part msg.Part.Index
+    Send msg trough internal peerMsgQueue to ConsensusState service
+```
+
+### VoteMessage handler
+
+```go
+handleMessage(msg):
+    Record in prs that a peer knows vote with index msg.vote.ValidatorIndex for particular height and round
+    Send msg trough internal peerMsgQueue to ConsensusState service
+```
+
+### VoteSetBitsMessage handler
+
+```go
+handleMessage(msg):
+    Update prs for the bit-array of votes peer claims to have for the msg.BlockID
+```
+
+The number of votes is limited to 10000 (`types.MaxVotesCount`) to protect the
+node against DOS attacks.
+
+## Gossip Data Routine
+
+It is used to send the following messages to the peer: `BlockPartMessage`, `ProposalMessage` and
+`ProposalPOLMessage` on the DataChannel. The gossip data routine is based on the local RoundState (`rs`)
+and the known PeerRoundState (`prs`). The routine repeats forever the logic shown below:
+
+```go
+1a) if rs.ProposalBlockPartsHeader == prs.ProposalBlockPartsHeader and the peer does not have all the proposal parts then
+        Part = pick a random proposal block part the peer does not have
+        Send BlockPartMessage(rs.Height, rs.Round, Part) to the peer on the DataChannel
+        if send returns true, record that the peer knows the corresponding block Part
+     Continue
+
+1b) if (0 < prs.Height) and (prs.Height < rs.Height) then
+        help peer catch up using gossipDataForCatchup function
+        Continue
+
+1c) if (rs.Height != prs.Height) or (rs.Round != prs.Round) then
+        Sleep PeerGossipSleepDuration
+        Continue
+
+//  at this point rs.Height == prs.Height and rs.Round == prs.Round
+1d) if (rs.Proposal != nil and !prs.Proposal) then
+        Send ProposalMessage(rs.Proposal) to the peer
+        if send returns true, record that the peer knows Proposal
+     if 0 <= rs.Proposal.POLRound then
+     polRound = rs.Proposal.POLRound
+        prevotesBitArray = rs.Votes.Prevotes(polRound).BitArray()
+        Send ProposalPOLMessage(rs.Height, polRound, prevotesBitArray)
+        Continue
+
+2)  Sleep PeerGossipSleepDuration
+```
+
+### Gossip Data For Catchup
+
+This function is responsible for helping peer catch up if it is at the smaller height (prs.Height < rs.Height).
+The function executes the following logic:
+
+```go
+    if peer does not have all block parts for prs.ProposalBlockPart then
+        blockMeta =  Load Block Metadata for height prs.Height from blockStore
+        if (!blockMeta.BlockID.PartsHeader == prs.ProposalBlockPartsHeader) then
+            Sleep PeerGossipSleepDuration
+     return
+        Part = pick a random proposal block part the peer does not have
+        Send BlockPartMessage(prs.Height, prs.Round, Part) to the peer on the DataChannel
+        if send returns true, record that the peer knows the corresponding block Part
+        return
+    else Sleep PeerGossipSleepDuration
+```
+
+## Gossip Votes Routine
+
+It is used to send the following message: `VoteMessage` on the VoteChannel.
+The gossip votes routine is based on the local RoundState (`rs`)
+and the known PeerRoundState (`prs`). The routine repeats forever the logic shown below:
+
+```go
+1a) if rs.Height == prs.Height then
+        if prs.Step == RoundStepNewHeight then
+            vote = random vote from rs.LastCommit the peer does not have
+            Send VoteMessage(vote) to the peer
+            if send returns true, continue
+
+        if prs.Step <= RoundStepPrevote and prs.Round != -1 and prs.Round <= rs.Round then
+            Prevotes = rs.Votes.Prevotes(prs.Round)
+            vote = random vote from Prevotes the peer does not have
+            Send VoteMessage(vote) to the peer
+            if send returns true, continue
+
+        if prs.Step <= RoundStepPrecommit and prs.Round != -1 and prs.Round <= rs.Round then
+          Precommits = rs.Votes.Precommits(prs.Round)
+            vote = random vote from Precommits the peer does not have
+            Send VoteMessage(vote) to the peer
+            if send returns true, continue
+
+        if prs.ProposalPOLRound != -1 then
+            PolPrevotes = rs.Votes.Prevotes(prs.ProposalPOLRound)
+            vote = random vote from PolPrevotes the peer does not have
+            Send VoteMessage(vote) to the peer
+            if send returns true, continue
+
+1b)  if prs.Height != 0 and rs.Height == prs.Height+1 then
+        vote = random vote from rs.LastCommit peer does not have
+        Send VoteMessage(vote) to the peer
+        if send returns true, continue
+
+1c)  if prs.Height != 0 and rs.Height >= prs.Height+2 then
+        Commit = get commit from BlockStore for prs.Height
+        vote = random vote from Commit the peer does not have
+        Send VoteMessage(vote) to the peer
+        if send returns true, continue
+
+2)   Sleep PeerGossipSleepDuration
+```
+
+## QueryMaj23Routine
+
+It is used to send the following message: `VoteSetMaj23Message`. `VoteSetMaj23Message` is sent to indicate that a given
+BlockID has seen +2/3 votes. This routine is based on the local RoundState (`rs`) and the known PeerRoundState
+(`prs`). The routine repeats forever the logic shown below.
+
+```go
+1a) if rs.Height == prs.Height then
+        Prevotes = rs.Votes.Prevotes(prs.Round)
+        if there is a ⅔ majority for some blockId in Prevotes then
+        m = VoteSetMaj23Message(prs.Height, prs.Round, Prevote, blockId)
+        Send m to peer
+        Sleep PeerQueryMaj23SleepDuration
+
+1b) if rs.Height == prs.Height then
+        Precommits = rs.Votes.Precommits(prs.Round)
+        if there is a ⅔ majority for some blockId in Precommits then
+        m = VoteSetMaj23Message(prs.Height,prs.Round,Precommit,blockId)
+        Send m to peer
+        Sleep PeerQueryMaj23SleepDuration
+
+1c) if rs.Height == prs.Height and prs.ProposalPOLRound >= 0 then
+        Prevotes = rs.Votes.Prevotes(prs.ProposalPOLRound)
+        if there is a ⅔ majority for some blockId in Prevotes then
+        m = VoteSetMaj23Message(prs.Height,prs.ProposalPOLRound,Prevotes,blockId)
+        Send m to peer
+        Sleep PeerQueryMaj23SleepDuration
+
+1d) if prs.CatchupCommitRound != -1 and 0 < prs.Height and
+        prs.Height <= blockStore.Height() then
+        Commit = LoadCommit(prs.Height)
+        m = VoteSetMaj23Message(prs.Height,Commit.Round,Precommit,Commit.BlockID)
+        Send m to peer
+        Sleep PeerQueryMaj23SleepDuration
+
+2)  Sleep PeerQueryMaj23SleepDuration
+```
+
+## Broadcast routine
+
+The Broadcast routine subscribes to an internal event bus to receive new round steps and votes messages, and broadcasts messages to peers upon receiving those
+events.
+It broadcasts `NewRoundStepMessage` or `CommitStepMessage` upon new round state event. Note that
+broadcasting these messages does not depend on the PeerRoundState; it is sent on the StateChannel.
+Upon receiving VoteMessage it broadcasts `HasVoteMessage` message to its peers on the StateChannel.
+
+## Channels
+
+Defines 4 channels: state, data, vote and vote_set_bits. Each channel
+has `SendQueueCapacity` and `RecvBufferCapacity` and
+`RecvMessageCapacity` set to `maxMsgSize`.
+
+Sending incorrectly encoded data will result in stopping the peer.

docs/tendermint-core/evidence/README.md

@@ -0,0 +1,13 @@
+---
+order: 1
+parent:
+  title: Evidence
+  order: 3
+---
+
+Evidence is used to identify validators who have or are acting malicious. There are multiple types of evidence, to read more on the evidence types please see [Evidence Types](https://docs.tendermint.com/master/spec/core/data_structures.html#evidence).
+
+The evidence reactor works similar to the mempool reactor. When evidence is observed, it is sent to all the peers in a repetitive manner. This ensures evidence is sent to as many people as possible to avoid sensoring. After evidence is received by peers and committed in a block it is pruned from the evidence module.
+
+Sending incorrectly encoded data or data exceeding `maxMsgSize` will result
+in stopping the peer.

docs/tendermint-core/mempool.md

@@ -1,48 +0,0 @@
----
-order: 12
----
-
-# Mempool
-
-## Transaction ordering
-
-Currently, there's no ordering of transactions other than the order they've
-arrived (via RPC or from other nodes).
-
-So the only way to specify the order is to send them to a single node.
-
-valA:
-
-- `tx1`
-- `tx2`
-- `tx3`
-
-If the transactions are split up across different nodes, there's no way to
-ensure they are processed in the expected order.
-
-valA:
-
-- `tx1`
-- `tx2`
-
-valB:
-
-- `tx3`
-
-If valB is the proposer, the order might be:
-
-- `tx3`
-- `tx1`
-- `tx2`
-
-If valA is the proposer, the order might be:
-
-- `tx1`
-- `tx2`
-- `tx3`
-
-That said, if the transactions contain some internal value, like an
-order/nonce/sequence number, the application can reject transactions that are
-out of order. So if a node receives `tx3`, then `tx1`, it can reject `tx3` and then
-accept `tx1`. The sender can then retry sending `tx3`, which should probably be
-rejected until the node has seen `tx2`.

docs/tendermint-core/mempool/README.md

@@ -0,0 +1,71 @@
+---
+order: 1
+parent:
+  title: Mempool
+  order: 2
+---
+
+The mempool is a in memory pool of potentially valid transactions,
+both to broadcast to other nodes, as well as to provide to the
+consensus reactor when it is selected as the block proposer.
+
+There are two sides to the mempool state:
+
+- External: get, check, and broadcast new transactions
+- Internal: return valid transaction, update list after block commit
+
+## External functionality
+
+External functionality is exposed via network interfaces
+to potentially untrusted actors.
+
+- CheckTx - triggered via RPC or P2P
+- Broadcast - gossip messages after a successful check
+
+## Internal functionality
+
+Internal functionality is exposed via method calls to other
+code compiled into the tendermint binary.
+
+- ReapMaxBytesMaxGas - get txs to propose in the next block. Guarantees that the
+    size of the txs is less than MaxBytes, and gas is less than MaxGas
+- Update - remove tx that were included in last block
+- ABCI.CheckTx - call ABCI app to validate the tx
+
+What does it provide the consensus reactor?
+What guarantees does it need from the ABCI app?
+(talk about interleaving processes in concurrency)
+
+## Optimizations
+
+The implementation within this library also implements a tx cache.
+This is so that signatures don't have to be reverified if the tx has
+already been seen before.
+However, we only store valid txs in the cache, not invalid ones.
+This is because invalid txs could become good later.
+Txs that are included in a block aren't removed from the cache,
+as they still may be getting received over the p2p network.
+These txs are stored in the cache by their hash, to mitigate memory concerns.
+
+Applications should implement replay protection, read [Replay
+Protection](https://github.com/tendermint/tendermint/blob/8cdaa7f515a9d366bbc9f0aff2a263a1a6392ead/docs/app-dev/app-development.md#replay-protection) for more information.
+
+## Configuration
+
+The mempool has various configurable paramet
+
+Sending incorrectly encoded data or data exceeding `maxMsgSize` will result
+in stopping the peer.
+
+`maxMsgSize` equals `MaxBatchBytes` (10MB) + 4 (proto overhead).
+`MaxBatchBytes` is a mempool config parameter -> defined locally. The reactor
+sends transactions to the connected peers in batches. The maximum size of one
+batch is `MaxBatchBytes`.
+
+The mempool will not send a tx back to any peer which it received it from.
+
+The reactor assigns an `uint16` number for each peer and maintains a map from
+p2p.ID to `uint16`. Each mempool transaction carries a list of all the senders
+(`[]uint16`). The list is updated every time mempool receives a transaction it
+is already seen. `uint16` assumes that a node will never have over 65535 active
+peers (0 is reserved for unknown source - e.g. RPC).

docs/tendermint-core/mempool/config.md

@@ -0,0 +1,105 @@
+---
+order: 2
+---
+
+# Configuration
+
+Here we describe configuration options around mempool.
+For the purposes of this document, they are described
+in a toml file, but some of them can also be passed in as
+environmental variables.
+
+Config:
+
+```toml
+[mempool]
+
+recheck = true
+broadcast = true
+wal-dir = ""
+
+# Maximum number of transactions in the mempool
+size = 5000
+
+# Limit the total size of all txs in the mempool.
+# This only accounts for raw transactions (e.g. given 1MB transactions and
+# max-txs-bytes=5MB, mempool will only accept 5 transactions).
+max-txs-bytes = 1073741824
+
+# Size of the cache (used to filter transactions we saw earlier) in transactions
+cache-size = 10000
+
+# Do not remove invalid transactions from the cache (default: false)
+# Set to true if it's not possible for any invalid transaction to become valid
+# again in the future.
+keep-invalid-txs-in-cache = false
+
+# Maximum size of a single transaction.
+# NOTE: the max size of a tx transmitted over the network is {max-tx-bytes}.
+max-tx-bytes = 1048576
+
+# Maximum size of a batch of transactions to send to a peer
+# Including space needed by encoding (one varint per transaction).
+# XXX: Unused due to https://github.com/tendermint/tendermint/issues/5796
+max-batch-bytes = 0
+```
+
+<!-- Flag: `--mempool.recheck=false`
+
+Environment: `TM_MEMPOOL_RECHECK=false` -->
+
+## Recheck
+
+Recheck determines if the mempool rechecks all pending
+transactions after a block was committed. Once a block
+is committed, the mempool removes all valid transactions
+that were successfully included in the block.
+
+If `recheck` is true, then it will rerun CheckTx on
+all remaining transactions with the new block state.
+
+## Broadcast
+
+Determines whether this node gossips any valid transactions
+that arrive in mempool. Default is to gossip anything that
+passes checktx. If this is disabled, transactions are not
+gossiped, but instead stored locally and added to the next
+block this node is the proposer.
+
+## WalDir
+
+This defines the directory where mempool writes the write-ahead
+logs. These files can be used to reload unbroadcasted
+transactions if the node crashes.
+
+If the directory passed in is an absolute path, the wal file is
+created there. If the directory is a relative path, the path is
+appended to home directory of the tendermint process to
+generate an absolute path to the wal directory
+(default `$HOME/.tendermint` or set via `TM_HOME` or `--home`)
+
+## Size
+
+Size defines the total amount of transactions stored in the mempool. Default is `5_000` but can be adjusted to any number you would like. The higher the size the more strain on the node.
+
+## Max Transactions Bytes
+
+Max transactions bytes defines the total size of all the transactions in the mempool. Default is 1 GB.
+
+## Cache size
+
+Cache size determines the size of the cache holding transactions we have already seen. The cache exists to avoid running `checktx` each time we receive a transaction.
+
+## Keep Invalid Transactions In Cache
+
+Keep invalid transactions in cache determines wether a transaction in the cache, which is invalid, should be evicted. An invalid transaction here may mean that the transaction may rely on a different tx that has not been included in a block. 
+
+## Max Transaction Bytes
+
+Max transaction bytes defines the max size a transaction can be for your node. If you would like your node to only keep track of smaller transactions this field would need to be changed. Default is 1MB.
+
+## Max Batch Bytes
+
+Max batch bytes defines the amount of bytes the node will send to a peer. Default is 0.
+
+> Note: Unused due to https://github.com/tendermint/tendermint/issues/5796

docs/tendermint-core/pex/README.md

@@ -0,0 +1,177 @@
+---
+order: 1
+parent:
+  title: Peer Exchange
+  order: 5
+---
+
+# Peer Strategy and Exchange
+
+Here we outline the design of the PeerStore
+and how it used by the Peer Exchange Reactor (PEX) to ensure we are connected
+to good peers and to gossip peers to others.
+
+## Peer Types
+
+Certain peers are special in that they are specified by the user as `persistent`,
+which means we auto-redial them if the connection fails, or if we fail to dial
+them.
+Some peers can be marked as `private`, which means
+we will not put them in the peer store or gossip them to others.
+
+All peers except private peers and peers coming from them are tracked using the
+peer store.
+
+The rest of our peers are only distinguished by being either
+inbound (they dialed our public address) or outbound (we dialed them).
+
+## Discovery
+
+Peer discovery begins with a list of seeds.
+
+When we don't have enough peers, we
+
+1. ask existing peers
+2. dial seeds if we're not dialing anyone currently
+
+On startup, we will also immediately dial the given list of `persistent_peers`,
+and will attempt to maintain persistent connections with them. If the
+connections die, or we fail to dial, we will redial every 5s for a few minutes,
+then switch to an exponential backoff schedule, and after about a day of
+trying, stop dialing the peer. This behavior is when `persistent_peers_max_dial_period` is configured to zero.
+
+But If `persistent_peers_max_dial_period` is set greater than zero, terms between each dial to each persistent peer
+will not exceed `persistent_peers_max_dial_period` during exponential backoff.
+Therefore, `dial_period` = min(`persistent_peers_max_dial_period`, `exponential_backoff_dial_period`)
+and we keep trying again regardless of `maxAttemptsToDial`
+
+As long as we have less than `MaxNumOutboundPeers`, we periodically request
+additional peers from each of our own and try seeds.
+
+## Listening
+
+Peers listen on a configurable ListenAddr that they self-report in their
+NodeInfo during handshakes with other peers. Peers accept up to
+`MaxNumInboundPeers` incoming peers.
+
+## Address Book
+
+Peers are tracked via their ID (their PubKey.Address()).
+Peers are added to the peer store from the PEX when they first connect to us or
+when we hear about them from other peers.
+
+The peer store is arranged in sets of buckets, and distinguishes between
+vetted (old) and unvetted (new) peers. It keeps different sets of buckets for
+vetted and unvetted peers. Buckets provide randomization over peer selection.
+Peers are put in buckets according to their IP groups.
+
+IP group can be a masked IP (e.g. `1.2.0.0` or `2602:100::`) or `local` for
+local addresses or `unroutable` for unroutable addresses. The mask which
+corresponds to the `/16` subnet is used for IPv4, `/32` subnet - for IPv6.
+Each group has a limited number of buckets to prevent DoS attacks coming from
+that group (e.g. an attacker buying a `/16` block of IPs and launching a DoS
+attack).
+
+[highwayhash](https://arxiv.org/abs/1612.06257) is used as a hashing function
+when calculating a bucket.
+
+When placing a peer into a new bucket:
+
+```md
+hash(key + sourcegroup + int64(hash(key + group + sourcegroup)) % bucket_per_group) % num_new_buckets
+```
+
+When placing a peer into an old bucket:
+
+```md
+hash(key + group + int64(hash(key + addr)) % buckets_per_group) % num_old_buckets
+```
+
+where `key` - random 24 HEX string, `group` - IP group of the peer (e.g. `1.2.0.0`),
+`sourcegroup` - IP group of the sender (peer who sent us this address) (e.g. `174.11.0.0`),
+`addr` - string representation of the peer's address (e.g. `174.11.10.2:26656`).
+
+A vetted peer can only be in one bucket. An unvetted peer can be in multiple buckets, and
+each instance of the peer can have a different IP:PORT.
+
+If we're trying to add a new peer but there's no space in its bucket, we'll
+remove the worst peer from that bucket to make room.
+
+## Vetting
+
+When a peer is first added, it is unvetted.
+Marking a peer as vetted is outside the scope of the `p2p` package.
+For Tendermint, a Peer becomes vetted once it has contributed sufficiently
+at the consensus layer; ie. once it has sent us valid and not-yet-known
+votes and/or block parts for `NumBlocksForVetted` blocks.
+Other users of the p2p package can determine their own conditions for when a peer is marked vetted.
+
+If a peer becomes vetted but there are already too many vetted peers,
+a randomly selected one of the vetted peers becomes unvetted.
+
+If a peer becomes unvetted (either a new peer, or one that was previously vetted),
+a randomly selected one of the unvetted peers is removed from the peer store.
+
+More fine-grained tracking of peer behaviour can be done using
+a trust metric (see below), but it's best to start with something simple.
+
+## Select Peers to Dial
+
+When we need more peers, we pick addresses randomly from the addrbook with some
+configurable bias for unvetted peers. The bias should be lower when we have
+fewer peers and can increase as we obtain more, ensuring that our first peers
+are more trustworthy, but always giving us the chance to discover new good
+peers.
+
+We track the last time we dialed a peer and the number of unsuccessful attempts
+we've made. If too many attempts are made, we mark the peer as bad.
+
+Connection attempts are made with exponential backoff (plus jitter). Because
+the selection process happens every `ensurePeersPeriod`, we might not end up
+dialing a peer for much longer than the backoff duration.
+
+If we fail to connect to the peer after 16 tries (with exponential backoff), we
+remove from peer store completely. But for persistent peers, we indefinitely try to
+dial all persistent peers unless `persistent_peers_max_dial_period` is configured to zero
+
+## Select Peers to Exchange
+
+When we’re asked for peers, we select them as follows:
+
+- select at most `maxGetSelection` peers
+- try to select at least `minGetSelection` peers - if we have less than that, select them all.
+- select a random, unbiased `getSelectionPercent` of the peers
+
+Send the selected peers. Note we select peers for sending without bias for vetted/unvetted.
+
+## Preventing Spam
+
+There are various cases where we decide a peer has misbehaved and we disconnect from them.
+When this happens, the peer is removed from the peer store and black listed for
+some amount of time. We call this "Disconnect and Mark".
+Note that the bad behaviour may be detected outside the PEX reactor itself
+(for instance, in the mconnection, or another reactor), but it must be communicated to the PEX reactor
+so it can remove and mark the peer.
+
+In the PEX, if a peer sends us an unsolicited list of peers,
+or if the peer sends a request too soon after another one,
+we Disconnect and MarkBad.
+
+## Trust Metric
+
+The quality of peers can be tracked in more fine-grained detail using a
+Proportional-Integral-Derivative (PID) controller that incorporates
+current, past, and rate-of-change data to inform peer quality.
+
+While a PID trust metric has been implemented, it remains for future work
+to use it in the PEX.
+
+See the [trustmetric](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-006-trust-metric.md)
+and [trustmetric useage](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-007-trust-metric-usage.md)
+architecture docs for more details.
+
+
+
+
+
+<!-- todo: diagrams!!! -->

docs/tendermint-core/state-sync.md

@@ -1,18 +0,0 @@
---- 
-order: 11
----
-
-# State Sync
-
-With block sync a node is downloading all of the data of an application from genesis and verifying it. 
-With state sync your node will download data related to the head or near the head of the chain and verify the data. 
-This leads to drastically shorter times for joining a network. 
-
-Information on how to configure state sync is located in the [nodes section](../nodes/state-sync.md)
-
-## Events
-
-When a node starts with the statesync flag enabled in the config file, it will emit two events: one upon starting statesync and the other upon completion.
-
-The user can query the events by subscribing `EventQueryStateSyncStatus`
-Please check [types](https://pkg.go.dev/github.com/tendermint/tendermint/types?utm_source=godoc#pkg-constants) for the details.

docs/tendermint-core/state-sync/README.md

@@ -0,0 +1,85 @@
+---
+order: 1
+parent:
+  title: State Sync
+  order: 4
+---
+
+
+State sync allows new nodes to rapidly bootstrap and join the network by discovering, fetching,
+and restoring state machine snapshots. For more information, see the [state sync ABCI section](https://docs.tendermint.com/master/spec/abci/abci.html#state-sync)).
+
+The state sync reactor has two main responsibilities:
+
+* Serving state machine snapshots taken by the local ABCI application to new nodes joining the
+  network.
+
+* Discovering existing snapshots and fetching snapshot chunks for an empty local application
+  being bootstrapped.
+
+The state sync process for bootstrapping a new node is described in detail in the section linked
+above. While technically part of the reactor (see `statesync/syncer.go` and related components),
+this document will only cover the P2P reactor component.
+
+For details on the ABCI methods and data types, see the [ABCI documentation](https://docs.tendermint.com/master/spec/abci/).
+
+Information on how to configure state sync is located in the [nodes section](../../nodes/state-sync.md)
+
+## State Sync P2P Protocol
+
+When a new node begin state syncing, it will ask all peers it encounters if it has any
+available snapshots:
+
+```go
+type snapshotsRequestMessage struct{}
+```
+
+The receiver will query the local ABCI application via `ListSnapshots`, and send a message
+containing snapshot metadata (limited to 4 MB) for each of the 10 most recent snapshots:
+
+```go
+type snapshotsResponseMessage struct {
+ Height   uint64
+ Format   uint32
+ Chunks   uint32
+ Hash     []byte
+ Metadata []byte
+}
+```
+
+The node running state sync will offer these snapshots to the local ABCI application via
+`OfferSnapshot` ABCI calls, and keep track of which peers contain which snapshots. Once a snapshot
+is accepted, the state syncer will request snapshot chunks from appropriate peers:
+
+```go
+type chunkRequestMessage struct {
+ Height uint64
+ Format uint32
+ Index  uint32
+}
+```
+
+The receiver will load the requested chunk from its local application via `LoadSnapshotChunk`,
+and respond with it (limited to 16 MB):
+
+```go
+type chunkResponseMessage struct {
+ Height  uint64
+ Format  uint32
+ Index   uint32
+ Chunk   []byte
+ Missing bool
+}
+```
+
+Here, `Missing` is used to signify that the chunk was not found on the peer, since an empty
+chunk is a valid (although unlikely) response.
+
+The returned chunk is given to the ABCI application via `ApplySnapshotChunk` until the snapshot
+is restored. If a chunk response is not returned within some time, it will be re-requested,
+possibly from a different peer.
+
+The ABCI application is able to request peer bans and chunk refetching as part of the ABCI protocol.
+
+If no state sync is in progress (i.e. during normal operation), any unsolicited response messages
+are discarded.

docs/tools/remote-signer-validation.md

@@ -1,4 +1,4 @@
-# tm-signer-harness
+# Remote Signer
 
 Located under the `tools/tm-signer-harness` folder in the [Tendermint
 repository](https://github.com/tendermint/tendermint).

docs/tutorials/go.md

@@ -367,7 +367,7 @@ func main() {
 
  flag.Parse()
 
- logger := log.NewTMLogger(log.NewSyncWriter(os.Stdout))
+ logger := log.MustNewDefaultLogger(log.LogFormatPlain, log.LogLevelInfo, false)
 
  server := abciserver.NewSocketServer(socketAddr, app)
  server.SetLogger(logger)
@@ -438,7 +438,7 @@ This should create a `go.mod` file. The current tutorial only works with
 the master branch of Tendermint, so let's make sure we're using the latest version:
 
 ```sh
-go get github.com/tendermint/tendermint@master
+go get github.com/tendermint/tendermint@97a3e44e0724f2017079ce24d36433f03124c09e
 ```
 
 This will populate the `go.mod` with a release number followed by a hash for Tendermint.

docs/versions

@@ -2,3 +2,4 @@ master                  master
 v0.32.x                 v0.32
 v0.33.x                 v0.33
 v0.34.x                 v0.34
+v0.35.x                 v0.35

go.mod

@@ -5,20 +5,23 @@ go 1.16
 require (
 	github.com/BurntSushi/toml v0.4.1
 	github.com/Workiva/go-datastructures v1.0.53
-	github.com/adlio/schema v1.1.13
+	github.com/adlio/schema v1.2.3
 	github.com/btcsuite/btcd v0.22.0-beta
 	github.com/btcsuite/btcutil v1.0.3-0.20201208143702-a53e38424cce
+	github.com/facebookgo/ensure v0.0.0-20160127193407-b4ab57deab51 // indirect
+	github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 // indirect
+	github.com/facebookgo/subset v0.0.0-20150612182917-8dac2c3c4870 // indirect
 	github.com/fortytw2/leaktest v1.3.0
 	github.com/go-kit/kit v0.12.0
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/protobuf v1.5.2
-	github.com/golangci/golangci-lint v1.42.1
+	github.com/golangci/golangci-lint v1.43.0
 	github.com/google/orderedcode v0.0.1
 	github.com/google/uuid v1.3.0
 	github.com/gorilla/websocket v1.4.2
 	github.com/grpc-ecosystem/go-grpc-middleware v1.3.0
 	github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0
-	github.com/lib/pq v1.10.3
+	github.com/lib/pq v1.10.4
 	github.com/libp2p/go-buffer-pool v0.0.2
 	github.com/minio/highwayhash v1.0.2
 	github.com/mroth/weightedrand v0.4.1
@@ -27,18 +30,18 @@ require (
 	github.com/prometheus/client_golang v1.11.0
 	github.com/rcrowley/go-metrics v0.0.0-20200313005456-10cdbea86bc0
 	github.com/rs/cors v1.8.0
-	github.com/rs/zerolog v1.25.0
+	github.com/rs/zerolog v1.26.1
 	github.com/sasha-s/go-deadlock v0.2.1-0.20190427202633-1595213edefa
 	github.com/snikch/goodman v0.0.0-20171125024755-10e37e294daa
-	github.com/spf13/cobra v1.2.1
-	github.com/spf13/viper v1.9.0
+	github.com/spf13/cobra v1.3.0
+	github.com/spf13/viper v1.10.1
 	github.com/stretchr/testify v1.7.0
-	github.com/tendermint/tm-db v0.6.4
+	github.com/tendermint/tm-db v0.6.6
 	github.com/vektra/mockery/v2 v2.9.4
-	golang.org/x/crypto v0.0.0-20210915214749-c084706c2272
-	golang.org/x/net v0.0.0-20210917221730-978cfadd31cf
+	golang.org/x/crypto v0.0.0-20211215165025-cf75a172585e
+	golang.org/x/net v0.0.0-20211208012354-db4efeb81f4b
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
-	google.golang.org/grpc v1.41.0
+	google.golang.org/grpc v1.43.0
 	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
 	pgregory.net/rapid v0.4.7
 )

go.sum

@@ -1,5 +1,6 @@
-4d63.com/gochecknoglobals v0.0.0-20201008074935-acfc0b28355a h1:wFEQiK85fRsEVF0CRrPAos5LoAryUsIX1kPW/WrIqFw=
-4d63.com/gochecknoglobals v0.0.0-20201008074935-acfc0b28355a/go.mod h1:wfdC5ZjKSPr7CybKEcgJhUOgeAQW1+7WcyK8OvUilfo=
+4d63.com/gochecknoglobals v0.1.0 h1:zeZSRqj5yCg28tCkIV/z/lWbwvNm5qnKVS15PI8nhD0=
+4d63.com/gochecknoglobals v0.1.0/go.mod h1:wfdC5ZjKSPr7CybKEcgJhUOgeAQW1+7WcyK8OvUilfo=
+bazil.org/fuse v0.0.0-20200407214033-5883e5a4b512/go.mod h1:FbcW6z/2VytnFDhZfumh8Ss8zxHE6qpMP5sHTRe0EaM=
 bitbucket.org/creachadair/shell v0.0.6/go.mod h1:8Qqi/cYk7vPnsOePHroKXDJYmb5x7ENhtiFtfZq8K+M=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
@@ -27,6 +28,10 @@ cloud.google.com/go v0.84.0/go.mod h1:RazrYuxIK6Kb7YrzzhPoLmCVzl7Sup4NrbKPg8KHSU
 cloud.google.com/go v0.87.0/go.mod h1:TpDYlFy7vuLzZMMZ+B6iRiELaY7z/gJPaqbMx6mlWcY=
 cloud.google.com/go v0.90.0/go.mod h1:kRX0mNRHe0e2rC6oNakvwQqzyDmg57xJ+SZU1eT2aDQ=
 cloud.google.com/go v0.93.3/go.mod h1:8utlLll2EF5XMAV15woO4lSbWQlk8rer9aLOfLh7+YI=
+cloud.google.com/go v0.94.1/go.mod h1:qAlAugsXlC+JWO+Bke5vCtc9ONxjQT3drlTTnAplMW4=
+cloud.google.com/go v0.97.0/go.mod h1:GF7l59pYBVlXQIBLx3a761cZ41F9bBH3JUlihCt2Udc=
+cloud.google.com/go v0.98.0/go.mod h1:ua6Ush4NALrHk5QXDWnjvZHN93OuF0HfuEPq9I1X0cM=
+cloud.google.com/go v0.99.0/go.mod h1:w0Xx2nLzqWJPuozYQX+hFfCSI8WioryfRDzkoI/Y2ZA=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
@@ -37,6 +42,7 @@ cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/firestore v1.1.0/go.mod h1:ulACoGHTpvq5r8rxGJ4ddJZBZqakUQqClKRT5SZwBmk=
 cloud.google.com/go/firestore v1.6.0/go.mod h1:afJwI0vaXwAG54kI7A//lP/lSPDkQORQuMkv56TxEPU=
+cloud.google.com/go/firestore v1.6.1/go.mod h1:asNXNOzBdyVQmEU+ggO8UPodTkEVFW5Qx+rwHnAz+EY=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
 cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
 cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
@@ -50,14 +56,18 @@ cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RX
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 contrib.go.opencensus.io/exporter/stackdriver v0.13.4/go.mod h1:aXENhDJ1Y4lIg4EUaVTwzvYETVNZk10Pu26tevFKLUc=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/Antonboom/errname v0.1.4 h1:lGSlI42Gm4bI1e+IITtXJXvxFM8N7naWimVFKcb0McY=
-github.com/Antonboom/errname v0.1.4/go.mod h1:jRXo3m0E0EuCnK3wbsSVH3X55Z4iTDLl6ZfCxwFj4TM=
-github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 h1:w+iIsaOQNcT7OZ575w+acHgRric5iCyQh+xv+KJ4HB8=
-github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
+github.com/Antonboom/errname v0.1.5 h1:IM+A/gz0pDhKmlt5KSNTVAvfLMb+65RxavBXpRtCUEg=
+github.com/Antonboom/errname v0.1.5/go.mod h1:DugbBstvPFQbv/5uLcRRzfrNqKE9tVdVCqWCLp6Cifo=
+github.com/Antonboom/nilnil v0.1.0 h1:DLDavmg0a6G/F4Lt9t7Enrbgb3Oph6LnDE6YVsmTt74=
+github.com/Antonboom/nilnil v0.1.0/go.mod h1:PhHLvRPSghY5Y7mX4TW+BHZQYo1A8flE5H20D3IPZBo=
+github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1 h1:UQHMgLO+TxOElx5B5HZ4hJQsoJ/PvUvKRhJHDQXO8P8=
+github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw=
 github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
+github.com/DATA-DOG/go-sqlmock v1.5.0/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
 github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
 github.com/DataDog/zstd v1.4.1 h1:3oxKN3wbHibqx897utPC2LTQU4J+IHWWJO+glkAkpFM=
 github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
@@ -72,8 +82,8 @@ github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3Q
 github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Masterminds/sprig v2.15.0+incompatible/go.mod h1:y6hNFY5UBTIWBxnzTeuNhlNS5hqE0NB0E6fgfo2Br3o=
 github.com/Masterminds/sprig v2.22.0+incompatible/go.mod h1:y6hNFY5UBTIWBxnzTeuNhlNS5hqE0NB0E6fgfo2Br3o=
-github.com/Microsoft/go-winio v0.4.14 h1:+hMXMk01us9KgxGb7ftKQt2Xpf5hH/yky+TDA+qxleU=
-github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
+github.com/Microsoft/go-winio v0.5.1 h1:aPJp2QD7OOrhO5tQXqQoGSJc+DjDtWTGLOmNyAm6FgY=
+github.com/Microsoft/go-winio v0.5.1/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 h1:TngWCqHvy9oXAN6lEVMRuU21PR1EtLVZJmdB18Gu3Rw=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5/go.mod h1:lmUJ/7eu/Q8D7ML55dXQrVaamCz2vxCfdQBasLZfHKk=
 github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
@@ -87,8 +97,8 @@ github.com/VividCortex/gohistogram v1.0.0 h1:6+hBz+qvs0JOrrNhhmR7lFxo5sINxBCGXrd
 github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
 github.com/Workiva/go-datastructures v1.0.53 h1:J6Y/52yX10Xc5JjXmGtWoSSxs3mZnGSaq37xZZh7Yig=
 github.com/Workiva/go-datastructures v1.0.53/go.mod h1:1yZL+zfsztete+ePzZz/Zb1/t5BnDuE2Ya2MMGhzP6A=
-github.com/adlio/schema v1.1.13 h1:LeNMVg5Z1FX+Qgz8tJUijBLRdcpbFUElz+d1489On98=
-github.com/adlio/schema v1.1.13/go.mod h1:L5Z7tw+7lRK1Fnpi/LT/ooCP1elkXn0krMWBQHUhEDE=
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@@ -99,7 +109,8 @@ github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRF
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@@ -107,6 +118,7 @@ github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hC
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@@ -126,12 +138,17 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
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@@ -146,23 +163,28 @@ github.com/btcsuite/snappy-go v0.0.0-20151229074030-0bdef8d06723/go.mod h1:8woku
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@@ -170,11 +192,17 @@ github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDk
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@@ -190,8 +218,10 @@ github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfc
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@@ -253,6 +286,7 @@ github.com/fortytw2/leaktest v1.3.0 h1:u8491cBMTQ8ft8aeV+adlcytMZylmA5nnwwkRZjI8
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@@ -263,8 +297,8 @@ github.com/fzipp/gocyclo v0.3.1/go.mod h1:DJHO6AUmbdqj2ET4Z9iArSuwWgYDRryYt2wASx
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@@ -279,19 +313,23 @@ github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V
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@@ -367,16 +405,16 @@ github.com/golangci/go-misc v0.0.0-20180628070357-927a3d87b613 h1:9kfjN3AdxcbsZB
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@@ -425,12 +463,12 @@ github.com/google/uuid v0.0.0-20161128191214-064e2069ce9c/go.mod h1:TIyPZe4Mgqvf
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@@ -448,15 +486,20 @@ github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/ad
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@@ -473,6 +516,8 @@ github.com/grpc-ecosystem/grpc-gateway v1.12.1/go.mod h1:8XEsbTttt/W+VvjtQhLACqC
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@@ -482,6 +527,7 @@ github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtng
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@@ -496,6 +542,8 @@ github.com/hashicorp/go-sockaddr v1.0.0/go.mod h1:7Xibr9yA9JjQq1JpNB2Vw7kxv8xerX
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@@ -505,14 +553,18 @@ github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T
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@@ -963,16 +1055,20 @@ github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
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@@ -1019,8 +1115,10 @@ golang.org/x/crypto v0.0.0-20210314154223-e6e6c4f2bb5b/go.mod h1:T9bdIzuCu7OtxOm
 golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
 golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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 golang.org/x/crypto v0.0.0-20210915214749-c084706c2272/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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 golang.org/x/exp v0.0.0-20180321215751-8460e604b9de/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20180807140117-3d87b88a115f/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@@ -1060,8 +1158,9 @@ golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.5.0 h1:UG21uOlmZabA4fW5i7ZX6bjw1xELEGg/ZLgZq9auk/Q=
+golang.org/x/mod v0.5.0/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
 golang.org/x/net v0.0.0-20180719180050-a680a1efc54d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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@@ -1098,7 +1197,6 @@ golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200813134508-3edf25e44fcc/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
@@ -1107,16 +1205,22 @@ golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20201031054903-ff519b6c9102/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
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 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -1133,6 +1237,8 @@ golang.org/x/oauth2 v0.0.0-20210514164344-f6687ab2804c/go.mod h1:KelEdhl1UZF7XfJ
 golang.org/x/oauth2 v0.0.0-20210628180205-a41e5a781914/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210805134026-6f1e6394065a/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
 golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
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 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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@@ -1163,6 +1269,7 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -1176,8 +1283,10 @@ golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191008105621-543471e840be/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -1196,12 +1305,13 @@ golang.org/x/sys v0.0.0-20200511232937-7e40ca221e25/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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@@ -1217,6 +1327,7 @@ golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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@@ -1225,9 +1336,20 @@ golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBc
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-golang.org/x/sys v0.0.0-20210917161153-d61c044b1678 h1:J27LZFQBFoihqXoegpscI10HpjZ7B5WQLLKL2FZXQKw=
+golang.org/x/sys v0.0.0-20210908233432-aa78b53d3365/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210915083310-ed5796bab164/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210917161153-d61c044b1678/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211013075003-97ac67df715c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211124211545-fe61309f8881/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211205182925-97ca703d548d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211210111614-af8b64212486 h1:5hpz5aRr+W1erYCL5JRhSUBJRph7l9XkNveoExlrKYk=
+golang.org/x/sys v0.0.0-20211210111614-af8b64212486/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
@@ -1343,12 +1465,16 @@ golang.org/x/tools v0.0.0-20210104081019-d8d6ddbec6ee/go.mod h1:emZCQorbCU4vsT4f
 golang.org/x/tools v0.0.0-20210105154028-b0ab187a4818/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
+golang.org/x/tools v0.1.1-0.20210205202024-ef80cdb6ec6d/go.mod h1:9bzcO0MWcOuT0tm1iBGzDVPshzfwoVvREIui8C+MHqU=
+golang.org/x/tools v0.1.1-0.20210302220138-2ac05c832e1a/go.mod h1:9bzcO0MWcOuT0tm1iBGzDVPshzfwoVvREIui8C+MHqU=
 golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.3/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.5 h1:ouewzE6p+/VEB31YYnTbEJdi8pFqKp4P4n85vwo3DHA=
 golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.1.6/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
+golang.org/x/tools v0.1.7 h1:6j8CgantCy3yc8JGBqkDLMKWqZ0RDU2g1HVgacojGWQ=
+golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -1386,7 +1512,13 @@ google.golang.org/api v0.48.0/go.mod h1:71Pr1vy+TAZRPkPs/xlCf5SsU8WjuAWv1Pfjbtuk
 google.golang.org/api v0.50.0/go.mod h1:4bNT5pAuq5ji4SRZm+5QIkjny9JAyVD/3gaSihNefaw=
 google.golang.org/api v0.51.0/go.mod h1:t4HdrdoNgyN5cbEfm7Lum0lcLDLiise1F8qDKX00sOU=
 google.golang.org/api v0.54.0/go.mod h1:7C4bFFOvVDGXjfDTAsgGwDgAxRDeQ4X8NvUedIt6z3k=
+google.golang.org/api v0.55.0/go.mod h1:38yMfeP1kfjsl8isn0tliTjIb1rJXcQi4UXlbqivdVE=
 google.golang.org/api v0.56.0/go.mod h1:38yMfeP1kfjsl8isn0tliTjIb1rJXcQi4UXlbqivdVE=
+google.golang.org/api v0.57.0/go.mod h1:dVPlbZyBo2/OjBpmvNdpn2GRm6rPy75jyU7bmhdrMgI=
+google.golang.org/api v0.59.0/go.mod h1:sT2boj7M9YJxZzgeZqXogmhfmRWDtPzT31xkieUbuZU=
+google.golang.org/api v0.61.0/go.mod h1:xQRti5UdCmoCEqFxcz93fTl338AVqDgyaDRuOZ3hg9I=
+google.golang.org/api v0.62.0/go.mod h1:dKmwPCydfsad4qCH08MSdgWjfHOyfpd4VtDGgRFdavw=
+google.golang.org/api v0.63.0/go.mod h1:gs4ij2ffTRXwuzzgJl/56BdwJaA194ijkfn++9tDuPo=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
@@ -1453,8 +1585,19 @@ google.golang.org/genproto v0.0.0-20210805201207-89edb61ffb67/go.mod h1:ob2IJxKr
 google.golang.org/genproto v0.0.0-20210813162853-db860fec028c/go.mod h1:cFeNkxwySK631ADgubI+/XFU/xp8FD5KIVV4rj8UC5w=
 google.golang.org/genproto v0.0.0-20210821163610-241b8fcbd6c8/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
 google.golang.org/genproto v0.0.0-20210828152312-66f60bf46e71/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
-google.golang.org/genproto v0.0.0-20210917145530-b395a37504d4 h1:ysnBoUyeL/H6RCvNRhWHjKoDEmguI+mPU+qHgK8qv/w=
+google.golang.org/genproto v0.0.0-20210831024726-fe130286e0e2/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
+google.golang.org/genproto v0.0.0-20210903162649-d08c68adba83/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
+google.golang.org/genproto v0.0.0-20210909211513-a8c4777a87af/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
 google.golang.org/genproto v0.0.0-20210917145530-b395a37504d4/go.mod h1:eFjDcFEctNawg4eG61bRv87N7iHBWyVhJu7u1kqDUXY=
+google.golang.org/genproto v0.0.0-20210924002016-3dee208752a0/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20211008145708-270636b82663/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20211028162531-8db9c33dc351/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20211129164237-f09f9a12af12/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20211203200212-54befc351ae9/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20211206160659-862468c7d6e0/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
+google.golang.org/genproto v0.0.0-20211208223120-3a66f561d7aa h1:I0YcKz0I7OAhddo7ya8kMnvprhcWM045PmkBdMO9zN0=
+google.golang.org/genproto v0.0.0-20211208223120-3a66f561d7aa/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/grpc v1.8.0/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
@@ -1485,8 +1628,10 @@ google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQ
 google.golang.org/grpc v1.39.0/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
 google.golang.org/grpc v1.39.1/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
 google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
-google.golang.org/grpc v1.41.0 h1:f+PlOh7QV4iIJkPrx5NQ7qaNGFQ3OTse67yaDHfju4E=
-google.golang.org/grpc v1.41.0/go.mod h1:U3l9uK9J0sini8mHphKoXyaqDA/8VyGnDee1zzIUK6k=
+google.golang.org/grpc v1.40.1/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
+google.golang.org/grpc v1.42.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
+google.golang.org/grpc v1.43.0 h1:Eeu7bZtDZ2DpRCsLhUlcrLnvYaMK1Gz86a+hMVvELmM=
+google.golang.org/grpc v1.43.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
 google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
@@ -1518,8 +1663,9 @@ gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8
 gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.62.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
-gopkg.in/ini.v1 v1.63.2 h1:tGK/CyBg7SMzb60vP1M03vNZ3VDu3wGQJwn7Sxi9r3c=
 gopkg.in/ini.v1 v1.63.2/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/ini.v1 v1.66.2 h1:XfR1dOYubytKy4Shzc2LHrrGhU0lDCfDGG1yLPmpgsI=
+gopkg.in/ini.v1 v1.66.2/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=

internal/blocksync/v0/reactor_test.go

@@ -98,7 +98,7 @@ func (rts *reactorTestSuite) addNode(t *testing.T,
 	t.Helper()
 
 	rts.nodes = append(rts.nodes, nodeID)
-	rts.app[nodeID] = proxy.NewAppConns(abciclient.NewLocalCreator(&abci.BaseApplication{}))
+	rts.app[nodeID] = proxy.NewAppConns(abciclient.NewLocalCreator(&abci.BaseApplication{}), proxy.NopMetrics())
 	require.NoError(t, rts.app[nodeID].Start())
 
 	blockDB := dbm.NewMemDB()
@@ -182,7 +182,8 @@ func (rts *reactorTestSuite) start(t *testing.T) {
 }
 
 func TestReactor_AbruptDisconnect(t *testing.T) {
-	cfg := config.ResetTestRoot("block_sync_reactor_test")
+	cfg, err := config.ResetTestRoot("block_sync_reactor_test")
+	require.NoError(t, err)
 	defer os.RemoveAll(cfg.RootDir)
 
 	genDoc, privVals := factory.RandGenesisDoc(cfg, 1, false, 30)
@@ -217,7 +218,8 @@ func TestReactor_AbruptDisconnect(t *testing.T) {
 }
 
 func TestReactor_SyncTime(t *testing.T) {
-	cfg := config.ResetTestRoot("block_sync_reactor_test")
+	cfg, err := config.ResetTestRoot("block_sync_reactor_test")
+	require.NoError(t, err)
 	defer os.RemoveAll(cfg.RootDir)
 
 	genDoc, privVals := factory.RandGenesisDoc(cfg, 1, false, 30)
@@ -240,7 +242,9 @@ func TestReactor_SyncTime(t *testing.T) {
 }
 
 func TestReactor_NoBlockResponse(t *testing.T) {
-	cfg := config.ResetTestRoot("block_sync_reactor_test")
+	cfg, err := config.ResetTestRoot("block_sync_reactor_test")
+	require.NoError(t, err)
+
 	defer os.RemoveAll(cfg.RootDir)
 
 	genDoc, privVals := factory.RandGenesisDoc(cfg, 1, false, 30)
@@ -287,7 +291,8 @@ func TestReactor_BadBlockStopsPeer(t *testing.T) {
 	// See: https://github.com/tendermint/tendermint/issues/6005
 	t.SkipNow()
 
-	cfg := config.ResetTestRoot("block_sync_reactor_test")
+	cfg, err := config.ResetTestRoot("block_sync_reactor_test")
+	require.NoError(t, err)
 	defer os.RemoveAll(cfg.RootDir)
 
 	maxBlockHeight := int64(48)

internal/blocksync/v2/reactor_test.go

@@ -165,7 +165,7 @@ func newTestReactor(t *testing.T, p testReactorParams) *BlockchainReactor {
 	} else {
 		app := &testApp{}
 		cc := abciclient.NewLocalCreator(app)
-		proxyApp := proxy.NewAppConns(cc)
+		proxyApp := proxy.NewAppConns(cc, proxy.NopMetrics())
 		err := proxyApp.Start()
 		require.NoError(t, err)
 		db := dbm.NewMemDB()
@@ -365,7 +365,8 @@ func TestReactorHelperMode(t *testing.T) {
 		channelID = byte(0x40)
 	)
 
-	cfg := config.ResetTestRoot("blockchain_reactor_v2_test")
+	cfg, err := config.ResetTestRoot("blockchain_reactor_v2_test")
+	require.NoError(t, err)
 	defer os.RemoveAll(cfg.RootDir)
 	genDoc, privVals := factory.RandGenesisDoc(cfg, 1, false, 30)
 
@@ -455,7 +456,8 @@ func TestReactorHelperMode(t *testing.T) {
 }
 
 func TestReactorSetSwitchNil(t *testing.T) {
-	cfg := config.ResetTestRoot("blockchain_reactor_v2_test")
+	cfg, err := config.ResetTestRoot("blockchain_reactor_v2_test")
+	require.NoError(t, err)
 	defer os.RemoveAll(cfg.RootDir)
 	genDoc, privVals := factory.RandGenesisDoc(cfg, 1, false, 30)
 
@@ -484,7 +486,7 @@ func newReactorStore(
 	require.Len(t, privVals, 1)
 	app := &testApp{}
 	cc := abciclient.NewLocalCreator(app)
-	proxyApp := proxy.NewAppConns(cc)
+	proxyApp := proxy.NewAppConns(cc, proxy.NopMetrics())
 	err := proxyApp.Start()
 	if err != nil {
 		panic(fmt.Errorf("error start app: %w", err))

internal/consensus/byzantine_test.go

@@ -50,7 +50,9 @@ func TestByzantinePrevoteEquivocation(t *testing.T) {
 			require.NoError(t, err)
 			require.NoError(t, stateStore.Save(state))
 
-			thisConfig := ResetConfig(fmt.Sprintf("%s_%d", testName, i))
+			thisConfig, err := ResetConfig(fmt.Sprintf("%s_%d", testName, i))
+			require.NoError(t, err)
+
 			defer os.RemoveAll(thisConfig.RootDir)
 
 			ensureDir(path.Dir(thisConfig.Consensus.WalFile()), 0700) // dir for wal
@@ -62,7 +64,7 @@ func TestByzantinePrevoteEquivocation(t *testing.T) {
 			blockStore := store.NewBlockStore(blockDB)
 
 			// one for mempool, one for consensus
-			mtx := new(tmsync.RWMutex)
+			mtx := new(tmsync.Mutex)
 			proxyAppConnMem := abciclient.NewLocalClient(mtx, app)
 			proxyAppConnCon := abciclient.NewLocalClient(mtx, app)
 

internal/consensus/common_test.go

@@ -50,20 +50,26 @@ type cleanupFunc func()
 func configSetup(t *testing.T) *config.Config {
 	t.Helper()
 
-	cfg := ResetConfig("consensus_reactor_test")
+	cfg, err := ResetConfig("consensus_reactor_test")
+	require.NoError(t, err)
+	t.Cleanup(func() { os.RemoveAll(cfg.RootDir) })
 
-	consensusReplayConfig := ResetConfig("consensus_replay_test")
-	configStateTest := ResetConfig("consensus_state_test")
-	configMempoolTest := ResetConfig("consensus_mempool_test")
-	configByzantineTest := ResetConfig("consensus_byzantine_test")
+	consensusReplayConfig, err := ResetConfig("consensus_replay_test")
+	require.NoError(t, err)
+	t.Cleanup(func() { os.RemoveAll(consensusReplayConfig.RootDir) })
+
+	configStateTest, err := ResetConfig("consensus_state_test")
+	require.NoError(t, err)
+	t.Cleanup(func() { os.RemoveAll(configStateTest.RootDir) })
+
+	configMempoolTest, err := ResetConfig("consensus_mempool_test")
+	require.NoError(t, err)
+	t.Cleanup(func() { os.RemoveAll(configMempoolTest.RootDir) })
+
+	configByzantineTest, err := ResetConfig("consensus_byzantine_test")
+	require.NoError(t, err)
+	t.Cleanup(func() { os.RemoveAll(configByzantineTest.RootDir) })
 
-	t.Cleanup(func() {
-		os.RemoveAll(cfg.RootDir)
-		os.RemoveAll(consensusReplayConfig.RootDir)
-		os.RemoveAll(configStateTest.RootDir)
-		os.RemoveAll(configMempoolTest.RootDir)
-		os.RemoveAll(configByzantineTest.RootDir)
-	})
 	return cfg
 }
 
@@ -73,7 +79,7 @@ func ensureDir(dir string, mode os.FileMode) {
 	}
 }
 
-func ResetConfig(name string) *config.Config {
+func ResetConfig(name string) (*config.Config, error) {
 	return config.ResetTestRoot(name)
 }
 
@@ -384,9 +390,12 @@ func subscribeToVoter(cs *State, addr []byte) <-chan tmpubsub.Message {
 //-------------------------------------------------------------------------------
 // consensus states
 
-func newState(state sm.State, pv types.PrivValidator, app abci.Application) *State {
-	cfg := config.ResetTestRoot("consensus_state_test")
-	return newStateWithConfig(cfg, state, pv, app)
+func newState(state sm.State, pv types.PrivValidator, app abci.Application) (*State, error) {
+	cfg, err := config.ResetTestRoot("consensus_state_test")
+	if err != nil {
+		return nil, err
+	}
+	return newStateWithConfig(cfg, state, pv, app), nil
 }
 
 func newStateWithConfig(
@@ -407,7 +416,7 @@ func newStateWithConfigAndBlockStore(
 	blockStore *store.BlockStore,
 ) *State {
 	// one for mempool, one for consensus
-	mtx := new(tmsync.RWMutex)
+	mtx := new(tmsync.Mutex)
 	proxyAppConnMem := abciclient.NewLocalClient(mtx, app)
 	proxyAppConnCon := abciclient.NewLocalClient(mtx, app)
 
@@ -454,13 +463,16 @@ func loadPrivValidator(cfg *config.Config) *privval.FilePV {
 	return privValidator
 }
 
-func randState(cfg *config.Config, nValidators int) (*State, []*validatorStub) {
+func randState(cfg *config.Config, nValidators int) (*State, []*validatorStub, error) {
 	// Get State
 	state, privVals := randGenesisState(cfg, nValidators, false, 10)
 
 	vss := make([]*validatorStub, nValidators)
 
-	cs := newState(state, privVals[0], kvstore.NewApplication())
+	cs, err := newState(state, privVals[0], kvstore.NewApplication())
+	if err != nil {
+		return nil, nil, err
+	}
 
 	for i := 0; i < nValidators; i++ {
 		vss[i] = newValidatorStub(privVals[i], int32(i))
@@ -468,7 +480,7 @@ func randState(cfg *config.Config, nValidators int) (*State, []*validatorStub) {
 	// since cs1 starts at 1
 	incrementHeight(vss[1:]...)
 
-	return cs, vss
+	return cs, vss, nil
 }
 
 //-------------------------------------------------------------------------------
@@ -722,7 +734,9 @@ func randConsensusState(
 		blockStore := store.NewBlockStore(dbm.NewMemDB()) // each state needs its own db
 		state, err := sm.MakeGenesisState(genDoc)
 		require.NoError(t, err)
-		thisConfig := ResetConfig(fmt.Sprintf("%s_%d", testName, i))
+		thisConfig, err := ResetConfig(fmt.Sprintf("%s_%d", testName, i))
+		require.NoError(t, err)
+
 		configRootDirs = append(configRootDirs, thisConfig.RootDir)
 
 		for _, opt := range configOpts {
@@ -772,7 +786,11 @@ func randConsensusNetWithPeers(
 	configRootDirs := make([]string, 0, nPeers)
 	for i := 0; i < nPeers; i++ {
 		state, _ := sm.MakeGenesisState(genDoc)
-		thisConfig := ResetConfig(fmt.Sprintf("%s_%d", testName, i))
+		thisConfig, err := ResetConfig(fmt.Sprintf("%s_%d", testName, i))
+		if err != nil {
+			panic(err)
+		}
+
 		configRootDirs = append(configRootDirs, thisConfig.RootDir)
 		ensureDir(filepath.Dir(thisConfig.Consensus.WalFile()), 0700) // dir for wal
 		if i == 0 {

internal/consensus/mempool_test.go

@@ -28,7 +28,8 @@ func assertMempool(txn txNotifier) mempool.Mempool {
 func TestMempoolNoProgressUntilTxsAvailable(t *testing.T) {
 	baseConfig := configSetup(t)
 
-	config := ResetConfig("consensus_mempool_txs_available_test")
+	config, err := ResetConfig("consensus_mempool_txs_available_test")
+	require.NoError(t, err)
 	t.Cleanup(func() { _ = os.RemoveAll(config.RootDir) })
 
 	config.Consensus.CreateEmptyBlocks = false
@@ -50,7 +51,8 @@ func TestMempoolNoProgressUntilTxsAvailable(t *testing.T) {
 func TestMempoolProgressAfterCreateEmptyBlocksInterval(t *testing.T) {
 	baseConfig := configSetup(t)
 
-	config := ResetConfig("consensus_mempool_txs_available_test")
+	config, err := ResetConfig("consensus_mempool_txs_available_test")
+	require.NoError(t, err)
 	t.Cleanup(func() { _ = os.RemoveAll(config.RootDir) })
 
 	config.Consensus.CreateEmptyBlocksInterval = ensureTimeout
@@ -70,7 +72,8 @@ func TestMempoolProgressAfterCreateEmptyBlocksInterval(t *testing.T) {
 func TestMempoolProgressInHigherRound(t *testing.T) {
 	baseConfig := configSetup(t)
 
-	config := ResetConfig("consensus_mempool_txs_available_test")
+	config, err := ResetConfig("consensus_mempool_txs_available_test")
+	require.NoError(t, err)
 	t.Cleanup(func() { _ = os.RemoveAll(config.RootDir) })
 
 	config.Consensus.CreateEmptyBlocks = false

internal/consensus/metrics.go

@@ -61,6 +61,9 @@ type Metrics struct {
 
 	// Number of blockparts transmitted by peer.
 	BlockParts metrics.Counter
+
+	// Histogram of time taken per step annotated with reason that the step proceeded.
+	StepTime metrics.Histogram
 }
 
 // PrometheusMetrics returns Metrics build using Prometheus client library.
@@ -187,6 +190,12 @@ func PrometheusMetrics(namespace string, labelsAndValues ...string) *Metrics {
 			Name:      "block_parts",
 			Help:      "Number of blockparts transmitted by peer.",
 		}, append(labels, "peer_id")).With(labelsAndValues...),
+		StepTime: prometheus.NewHistogramFrom(stdprometheus.HistogramOpts{
+			Namespace: namespace,
+			Subsystem: MetricsSubsystem,
+			Name:      "step_time",
+			Help:      "Time spent per step.",
+		}, append(labels, "step", "reason")).With(labelsAndValues...),
 	}
 }
 

internal/consensus/msgs.go

@@ -77,7 +77,7 @@ func (m *NewRoundStepMessage) ValidateHeight(initialHeight int64) error {
 			m.LastCommitRound, initialHeight)
 	}
 	if m.Height > initialHeight && m.LastCommitRound < 0 {
-		return fmt.Errorf("LastCommitRound can only be negative for initial height %v", // nolint
+		return fmt.Errorf("LastCommitRound can only be negative for initial height %v",
 			initialHeight)
 	}
 	return nil

internal/consensus/msgs_test.go

@@ -313,7 +313,6 @@ func TestWALMsgProto(t *testing.T) {
 	}
 }
 
-// nolint:lll //ignore line length for tests
 func TestConsMsgsVectors(t *testing.T) {
 	date := time.Date(2018, 8, 30, 12, 0, 0, 0, time.UTC)
 	psh := types.PartSetHeader{

internal/consensus/peer_state.go

@@ -193,7 +193,10 @@ func (ps *PeerState) PickVoteToSend(votes types.VoteSetReader) (*types.Vote, boo
 	}
 
 	if index, ok := votes.BitArray().Sub(psVotes).PickRandom(); ok {
-		return votes.GetByIndex(int32(index)), true
+		vote := votes.GetByIndex(int32(index))
+		if vote != nil {
+			return vote, true
+		}
 	}
 
 	return nil, false
@@ -358,6 +361,9 @@ func (ps *PeerState) BlockPartsSent() int {
 
 // SetHasVote sets the given vote as known by the peer
 func (ps *PeerState) SetHasVote(vote *types.Vote) {
+	if vote == nil {
+		return
+	}
 	ps.mtx.Lock()
 	defer ps.mtx.Unlock()
 

internal/consensus/reactor.go

@@ -230,17 +230,15 @@ func (r *Reactor) OnStop() {
 	}
 
 	r.mtx.Lock()
-	peers := r.peers
+	// Close and wait for each of the peers to shutdown.
+	// This is safe to perform with the lock since none of the peers require the
+	// lock to complete any of the methods that the waitgroup is waiting on.
+	for _, state := range r.peers {
+		state.closer.Close()
+		state.broadcastWG.Wait()
+	}
 	r.mtx.Unlock()
 
-	// wait for all spawned peer goroutines to gracefully exit
-	for _, ps := range peers {
-		ps.closer.Close()
-	}
-	for _, ps := range peers {
-		ps.broadcastWG.Wait()
-	}
-
 	// Close the StateChannel goroutine separately since it uses its own channel
 	// to signal closure.
 	close(r.stateCloseCh)

internal/consensus/reactor_test.go

@@ -332,7 +332,8 @@ func TestReactorWithEvidence(t *testing.T) {
 		stateStore := sm.NewStore(stateDB)
 		state, err := sm.MakeGenesisState(genDoc)
 		require.NoError(t, err)
-		thisConfig := ResetConfig(fmt.Sprintf("%s_%d", testName, i))
+		thisConfig, err := ResetConfig(fmt.Sprintf("%s_%d", testName, i))
+		require.NoError(t, err)
 
 		defer os.RemoveAll(thisConfig.RootDir)
 
@@ -346,7 +347,7 @@ func TestReactorWithEvidence(t *testing.T) {
 		blockStore := store.NewBlockStore(blockDB)
 
 		// one for mempool, one for consensus
-		mtx := new(tmsync.RWMutex)
+		mtx := new(tmsync.Mutex)
 		proxyAppConnMem := abciclient.NewLocalClient(mtx, app)
 		proxyAppConnCon := abciclient.NewLocalClient(mtx, app)
 

internal/consensus/replay_file.go

@@ -312,7 +312,7 @@ func newConsensusStateForReplay(cfg config.BaseConfig, csConfig *config.Consensu
 
 	// Create proxyAppConn connection (consensus, mempool, query)
 	clientCreator, _ := proxy.DefaultClientCreator(cfg.ProxyApp, cfg.ABCI, cfg.DBDir())
-	proxyApp := proxy.NewAppConns(clientCreator)
+	proxyApp := proxy.NewAppConns(clientCreator, proxy.NopMetrics())
 	err = proxyApp.Start()
 	if err != nil {
 		tmos.Exit(fmt.Sprintf("Error starting proxy app conns: %v", err))

internal/consensus/replay_stubs.go

@@ -24,6 +24,7 @@ func (emptyMempool) Size() int { return 0 }
 func (emptyMempool) CheckTx(_ context.Context, _ types.Tx, _ func(*abci.Response), _ mempool.TxInfo) error {
 	return nil
 }
+func (emptyMempool) RemoveTxByKey(txKey types.TxKey) error   { return nil }
 func (emptyMempool) ReapMaxBytesMaxGas(_, _ int64) types.Txs { return types.Txs{} }
 func (emptyMempool) ReapMaxTxs(n int) types.Txs              { return types.Txs{} }
 func (emptyMempool) Update(
@@ -63,7 +64,7 @@ func newMockProxyApp(appHash []byte, abciResponses *tmstate.ABCIResponses) proxy
 	if err != nil {
 		panic(err)
 	}
-	return proxy.NewAppConnConsensus(cli)
+	return proxy.NewAppConnConsensus(cli, proxy.NopMetrics())
 }
 
 type mockProxyApp struct {

internal/consensus/replay_test.go

@@ -131,7 +131,8 @@ func TestWALCrash(t *testing.T) {
 	for _, tc := range testCases {
 		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
-			consensusReplayConfig := ResetConfig(tc.name)
+			consensusReplayConfig, err := ResetConfig(tc.name)
+			require.NoError(t, err)
 			crashWALandCheckLiveness(t, consensusReplayConfig, tc.initFn, tc.heightToStop)
 		})
 	}
@@ -690,7 +691,8 @@ func testHandshakeReplay(t *testing.T, sim *simulatorTestSuite, nBlocks int, mod
 	cfg := sim.Config
 
 	if testValidatorsChange {
-		testConfig := ResetConfig(fmt.Sprintf("%s_%v_m", t.Name(), mode))
+		testConfig, err := ResetConfig(fmt.Sprintf("%s_%v_m", t.Name(), mode))
+		require.NoError(t, err)
 		defer func() { _ = os.RemoveAll(testConfig.RootDir) }()
 		stateDB = dbm.NewMemDB()
 
@@ -700,7 +702,8 @@ func testHandshakeReplay(t *testing.T, sim *simulatorTestSuite, nBlocks int, mod
 		commits = sim.Commits
 		store = newMockBlockStore(cfg, genesisState.ConsensusParams)
 	} else { // test single node
-		testConfig := ResetConfig(fmt.Sprintf("%s_%v_s", t.Name(), mode))
+		testConfig, err := ResetConfig(fmt.Sprintf("%s_%v_s", t.Name(), mode))
+		require.NoError(t, err)
 		defer func() { _ = os.RemoveAll(testConfig.RootDir) }()
 		walBody, err := WALWithNBlocks(t, numBlocks)
 		require.NoError(t, err)
@@ -745,7 +748,7 @@ func testHandshakeReplay(t *testing.T, sim *simulatorTestSuite, nBlocks int, mod
 	if nBlocks > 0 {
 		// run nBlocks against a new client to build up the app state.
 		// use a throwaway tendermint state
-		proxyApp := proxy.NewAppConns(clientCreator2)
+		proxyApp := proxy.NewAppConns(clientCreator2, proxy.NopMetrics())
 		stateDB1 := dbm.NewMemDB()
 		stateStore := sm.NewStore(stateDB1)
 		err := stateStore.Save(genesisState)
@@ -765,7 +768,7 @@ func testHandshakeReplay(t *testing.T, sim *simulatorTestSuite, nBlocks int, mod
 	// now start the app using the handshake - it should sync
 	genDoc, _ := sm.MakeGenesisDocFromFile(cfg.GenesisFile())
 	handshaker := NewHandshaker(stateStore, state, store, genDoc)
-	proxyApp := proxy.NewAppConns(clientCreator2)
+	proxyApp := proxy.NewAppConns(clientCreator2, proxy.NopMetrics())
 	if err := proxyApp.Start(); err != nil {
 		t.Fatalf("Error starting proxy app connections: %v", err)
 	}
@@ -893,7 +896,7 @@ func buildTMStateFromChain(
 	defer kvstoreApp.Close()
 	clientCreator := abciclient.NewLocalCreator(kvstoreApp)
 
-	proxyApp := proxy.NewAppConns(clientCreator)
+	proxyApp := proxy.NewAppConns(clientCreator, proxy.NopMetrics())
 	if err := proxyApp.Start(); err != nil {
 		panic(err)
 	}
@@ -938,7 +941,8 @@ func TestHandshakePanicsIfAppReturnsWrongAppHash(t *testing.T) {
 	//		- 0x01
 	//		- 0x02
 	//		- 0x03
-	cfg := ResetConfig("handshake_test_")
+	cfg, err := ResetConfig("handshake_test_")
+	require.NoError(t, err)
 	t.Cleanup(func() { os.RemoveAll(cfg.RootDir) })
 	privVal, err := privval.LoadFilePV(cfg.PrivValidator.KeyFile(), cfg.PrivValidator.StateFile())
 	require.NoError(t, err)
@@ -960,7 +964,7 @@ func TestHandshakePanicsIfAppReturnsWrongAppHash(t *testing.T) {
 	{
 		app := &badApp{numBlocks: 3, allHashesAreWrong: true}
 		clientCreator := abciclient.NewLocalCreator(app)
-		proxyApp := proxy.NewAppConns(clientCreator)
+		proxyApp := proxy.NewAppConns(clientCreator, proxy.NopMetrics())
 		err := proxyApp.Start()
 		require.NoError(t, err)
 		t.Cleanup(func() {
@@ -984,7 +988,7 @@ func TestHandshakePanicsIfAppReturnsWrongAppHash(t *testing.T) {
 	{
 		app := &badApp{numBlocks: 3, onlyLastHashIsWrong: true}
 		clientCreator := abciclient.NewLocalCreator(app)
-		proxyApp := proxy.NewAppConns(clientCreator)
+		proxyApp := proxy.NewAppConns(clientCreator, proxy.NopMetrics())
 		err := proxyApp.Start()
 		require.NoError(t, err)
 		t.Cleanup(func() {
@@ -1191,6 +1195,7 @@ func (bs *mockBlockStore) LoadBlock(height int64) *types.Block { return bs.chain
 func (bs *mockBlockStore) LoadBlockByHash(hash []byte) *types.Block {
 	return bs.chain[int64(len(bs.chain))-1]
 }
+func (bs *mockBlockStore) LoadBlockMetaByHash(hash []byte) *types.BlockMeta { return nil }
 func (bs *mockBlockStore) LoadBlockMeta(height int64) *types.BlockMeta {
 	block := bs.chain[height-1]
 	return &types.BlockMeta{
@@ -1228,7 +1233,8 @@ func TestHandshakeUpdatesValidators(t *testing.T) {
 	app := &initChainApp{vals: types.TM2PB.ValidatorUpdates(vals)}
 	clientCreator := abciclient.NewLocalCreator(app)
 
-	cfg := ResetConfig("handshake_test_")
+	cfg, err := ResetConfig("handshake_test_")
+	require.NoError(t, err)
 	t.Cleanup(func() { _ = os.RemoveAll(cfg.RootDir) })
 
 	privVal, err := privval.LoadFilePV(cfg.PrivValidator.KeyFile(), cfg.PrivValidator.StateFile())
@@ -1243,7 +1249,7 @@ func TestHandshakeUpdatesValidators(t *testing.T) {
 	// now start the app using the handshake - it should sync
 	genDoc, _ := sm.MakeGenesisDocFromFile(cfg.GenesisFile())
 	handshaker := NewHandshaker(stateStore, state, store, genDoc)
-	proxyApp := proxy.NewAppConns(clientCreator)
+	proxyApp := proxy.NewAppConns(clientCreator, proxy.NopMetrics())
 	if err := proxyApp.Start(); err != nil {
 		t.Fatalf("Error starting proxy app connections: %v", err)
 	}

internal/consensus/state.go

@@ -1968,7 +1968,6 @@ func (cs *State) tryAddVote(vote *types.Vote, peerID types.NodeID) (bool, error)
 		// If the vote height is off, we'll just ignore it,
 		// But if it's a conflicting sig, add it to the cs.evpool.
 		// If it's otherwise invalid, punish peer.
-		// nolint: gocritic
 		if voteErr, ok := err.(*types.ErrVoteConflictingVotes); ok {
 			if cs.privValidatorPubKey == nil {
 				return false, errPubKeyIsNotSet

internal/consensus/state_test.go

@@ -58,7 +58,9 @@ x * TestHalt1 - if we see +2/3 precommits after timing out into new round, we sh
 func TestStateProposerSelection0(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
+
 	height, round := cs1.Height, cs1.Round
 
 	newRoundCh := subscribe(cs1.eventBus, types.EventQueryNewRound)
@@ -100,7 +102,9 @@ func TestStateProposerSelection0(t *testing.T) {
 func TestStateProposerSelection2(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4) // test needs more work for more than 3 validators
+	cs1, vss, err := randState(config, 4) // test needs more work for more than 3 validators
+	require.NoError(t, err)
+
 	height := cs1.Height
 	newRoundCh := subscribe(cs1.eventBus, types.EventQueryNewRound)
 
@@ -139,7 +143,8 @@ func TestStateProposerSelection2(t *testing.T) {
 func TestStateEnterProposeNoPrivValidator(t *testing.T) {
 	config := configSetup(t)
 
-	cs, _ := randState(config, 1)
+	cs, _, err := randState(config, 1)
+	require.NoError(t, err)
 	cs.SetPrivValidator(nil)
 	height, round := cs.Height, cs.Round
 
@@ -160,7 +165,8 @@ func TestStateEnterProposeNoPrivValidator(t *testing.T) {
 func TestStateEnterProposeYesPrivValidator(t *testing.T) {
 	config := configSetup(t)
 
-	cs, _ := randState(config, 1)
+	cs, _, err := randState(config, 1)
+	require.NoError(t, err)
 	height, round := cs.Height, cs.Round
 
 	// Listen for propose timeout event
@@ -192,7 +198,8 @@ func TestStateEnterProposeYesPrivValidator(t *testing.T) {
 func TestStateBadProposal(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 2)
+	cs1, vss, err := randState(config, 2)
+	require.NoError(t, err)
 	height, round := cs1.Height, cs1.Round
 	vs2 := vss[1]
 
@@ -252,7 +259,8 @@ func TestStateBadProposal(t *testing.T) {
 func TestStateOversizedBlock(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 2)
+	cs1, vss, err := randState(config, 2)
+	require.NoError(t, err)
 	cs1.state.ConsensusParams.Block.MaxBytes = 2000
 	height, round := cs1.Height, cs1.Round
 	vs2 := vss[1]
@@ -316,7 +324,8 @@ func TestStateOversizedBlock(t *testing.T) {
 func TestStateFullRound1(t *testing.T) {
 	config := configSetup(t)
 
-	cs, vss := randState(config, 1)
+	cs, vss, err := randState(config, 1)
+	require.NoError(t, err)
 	height, round := cs.Height, cs.Round
 
 	// NOTE: buffer capacity of 0 ensures we can validate prevote and last commit
@@ -358,7 +367,8 @@ func TestStateFullRound1(t *testing.T) {
 func TestStateFullRoundNil(t *testing.T) {
 	config := configSetup(t)
 
-	cs, vss := randState(config, 1)
+	cs, vss, err := randState(config, 1)
+	require.NoError(t, err)
 	height, round := cs.Height, cs.Round
 
 	voteCh := subscribe(cs.eventBus, types.EventQueryVote)
@@ -378,7 +388,8 @@ func TestStateFullRoundNil(t *testing.T) {
 func TestStateFullRound2(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 2)
+	cs1, vss, err := randState(config, 2)
+	require.NoError(t, err)
 	vs2 := vss[1]
 	height, round := cs1.Height, cs1.Round
 
@@ -420,7 +431,8 @@ func TestStateFullRound2(t *testing.T) {
 func TestStateLockNoPOL(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 2)
+	cs1, vss, err := randState(config, 2)
+	require.NoError(t, err)
 	vs2 := vss[1]
 	height, round := cs1.Height, cs1.Round
 
@@ -558,7 +570,8 @@ func TestStateLockNoPOL(t *testing.T) {
 
 	ensureNewTimeout(timeoutWaitCh, height, round, cs1.config.Precommit(round).Nanoseconds())
 
-	cs2, _ := randState(config, 2) // needed so generated block is different than locked block
+	cs2, _, err := randState(config, 2) // needed so generated block is different than locked block
+	require.NoError(t, err)
 	// before we time out into new round, set next proposal block
 	prop, propBlock := decideProposal(cs2, vs2, vs2.Height, vs2.Round+1)
 	if prop == nil || propBlock == nil {
@@ -610,7 +623,8 @@ func TestStateLockNoPOL(t *testing.T) {
 func TestStateLockPOLRelock(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -654,7 +668,9 @@ func TestStateLockPOLRelock(t *testing.T) {
 	signAddVotes(config, cs1, tmproto.PrecommitType, nil, types.PartSetHeader{}, vs2, vs3, vs4)
 
 	// before we timeout to the new round set the new proposal
-	cs2 := newState(cs1.state, vs2, kvstore.NewApplication())
+	cs2, err := newState(cs1.state, vs2, kvstore.NewApplication())
+	require.NoError(t, err)
+
 	prop, propBlock := decideProposal(cs2, vs2, vs2.Height, vs2.Round+1)
 	if prop == nil || propBlock == nil {
 		t.Fatal("Failed to create proposal block with vs2")
@@ -709,7 +725,8 @@ func TestStateLockPOLRelock(t *testing.T) {
 func TestStateLockPOLUnlock(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -803,7 +820,8 @@ func TestStateLockPOLUnlock(t *testing.T) {
 func TestStateLockPOLUnlockOnUnknownBlock(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -843,7 +861,8 @@ func TestStateLockPOLUnlockOnUnknownBlock(t *testing.T) {
 	signAddVotes(config, cs1, tmproto.PrecommitType, nil, types.PartSetHeader{}, vs2, vs3, vs4)
 
 	// before we timeout to the new round set the new proposal
-	cs2 := newState(cs1.state, vs2, kvstore.NewApplication())
+	cs2, err := newState(cs1.state, vs2, kvstore.NewApplication())
+	require.NoError(t, err)
 	prop, propBlock := decideProposal(cs2, vs2, vs2.Height, vs2.Round+1)
 	if prop == nil || propBlock == nil {
 		t.Fatal("Failed to create proposal block with vs2")
@@ -887,7 +906,8 @@ func TestStateLockPOLUnlockOnUnknownBlock(t *testing.T) {
 	signAddVotes(config, cs1, tmproto.PrecommitType, nil, types.PartSetHeader{}, vs2, vs3, vs4)
 
 	// before we timeout to the new round set the new proposal
-	cs3 := newState(cs1.state, vs3, kvstore.NewApplication())
+	cs3, err := newState(cs1.state, vs3, kvstore.NewApplication())
+	require.NoError(t, err)
 	prop, propBlock = decideProposal(cs3, vs3, vs3.Height, vs3.Round+1)
 	if prop == nil || propBlock == nil {
 		t.Fatal("Failed to create proposal block with vs2")
@@ -931,7 +951,8 @@ func TestStateLockPOLUnlockOnUnknownBlock(t *testing.T) {
 func TestStateLockPOLSafety1(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -1054,7 +1075,8 @@ func TestStateLockPOLSafety1(t *testing.T) {
 func TestStateLockPOLSafety2(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -1153,7 +1175,8 @@ func TestStateLockPOLSafety2(t *testing.T) {
 func TestProposeValidBlock(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -1245,7 +1268,8 @@ func TestProposeValidBlock(t *testing.T) {
 func TestSetValidBlockOnDelayedPrevote(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -1309,7 +1333,8 @@ func TestSetValidBlockOnDelayedPrevote(t *testing.T) {
 func TestSetValidBlockOnDelayedProposal(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -1367,7 +1392,8 @@ func TestSetValidBlockOnDelayedProposal(t *testing.T) {
 func TestWaitingTimeoutOnNilPolka(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -1390,7 +1416,8 @@ func TestWaitingTimeoutOnNilPolka(t *testing.T) {
 func TestWaitingTimeoutProposeOnNewRound(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -1428,7 +1455,8 @@ func TestWaitingTimeoutProposeOnNewRound(t *testing.T) {
 func TestRoundSkipOnNilPolkaFromHigherRound(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 
@@ -1466,7 +1494,8 @@ func TestRoundSkipOnNilPolkaFromHigherRound(t *testing.T) {
 func TestWaitTimeoutProposeOnNilPolkaForTheCurrentRound(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, int32(1)
 
@@ -1495,7 +1524,8 @@ func TestWaitTimeoutProposeOnNilPolkaForTheCurrentRound(t *testing.T) {
 func TestEmitNewValidBlockEventOnCommitWithoutBlock(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, int32(1)
 
@@ -1531,7 +1561,8 @@ func TestEmitNewValidBlockEventOnCommitWithoutBlock(t *testing.T) {
 func TestCommitFromPreviousRound(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, int32(1)
 
@@ -1587,7 +1618,8 @@ func TestStartNextHeightCorrectlyAfterTimeout(t *testing.T) {
 	config := configSetup(t)
 
 	config.Consensus.SkipTimeoutCommit = false
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	cs1.txNotifier = &fakeTxNotifier{ch: make(chan struct{})}
 
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
@@ -1650,7 +1682,8 @@ func TestResetTimeoutPrecommitUponNewHeight(t *testing.T) {
 	config := configSetup(t)
 
 	config.Consensus.SkipTimeoutCommit = false
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
@@ -1793,7 +1826,8 @@ func TestStateSlashingPrecommits(t *testing.T) {
 func TestStateHalt1(t *testing.T) {
 	config := configSetup(t)
 
-	cs1, vss := randState(config, 4)
+	cs1, vss, err := randState(config, 4)
+	require.NoError(t, err)
 	vs2, vs3, vs4 := vss[1], vss[2], vss[3]
 	height, round := cs1.Height, cs1.Round
 	partSize := types.BlockPartSizeBytes
@@ -1863,7 +1897,8 @@ func TestStateOutputsBlockPartsStats(t *testing.T) {
 	config := configSetup(t)
 
 	// create dummy peer
-	cs, _ := randState(config, 1)
+	cs, _, err := randState(config, 1)
+	require.NoError(t, err)
 	peer := p2pmock.NewPeer(nil)
 
 	// 1) new block part
@@ -1907,7 +1942,8 @@ func TestStateOutputsBlockPartsStats(t *testing.T) {
 func TestStateOutputVoteStats(t *testing.T) {
 	config := configSetup(t)
 
-	cs, vss := randState(config, 2)
+	cs, vss, err := randState(config, 2)
+	require.NoError(t, err)
 	// create dummy peer
 	peer := p2pmock.NewPeer(nil)
 
@@ -1942,7 +1978,8 @@ func TestStateOutputVoteStats(t *testing.T) {
 func TestSignSameVoteTwice(t *testing.T) {
 	config := configSetup(t)
 
-	_, vss := randState(config, 2)
+	_, vss, err := randState(config, 2)
+	require.NoError(t, err)
 
 	randBytes := tmrand.Bytes(tmhash.Size)
 

internal/consensus/types/height_vote_set_test.go

@@ -18,7 +18,11 @@ import (
 var cfg *config.Config // NOTE: must be reset for each _test.go file
 
 func TestMain(m *testing.M) {
-	cfg = config.ResetTestRoot("consensus_height_vote_set_test")
+	var err error
+	cfg, err = config.ResetTestRoot("consensus_height_vote_set_test")
+	if err != nil {
+		panic(err)
+	}
 	code := m.Run()
 	os.RemoveAll(cfg.RootDir)
 	os.Exit(code)

internal/consensus/wal_fuzz.go

@@ -1,3 +1,4 @@
+//go:build gofuzz
 // +build gofuzz
 
 package consensus

internal/consensus/wal_generator.go

@@ -65,7 +65,7 @@ func WALGenerateNBlocks(t *testing.T, wr io.Writer, numBlocks int) (err error) {
 
 	blockStore := store.NewBlockStore(blockStoreDB)
 
-	proxyApp := proxy.NewAppConns(abciclient.NewLocalCreator(app))
+	proxyApp := proxy.NewAppConns(abciclient.NewLocalCreator(app), proxy.NopMetrics())
 	proxyApp.SetLogger(logger.With("module", "proxy"))
 	if err := proxyApp.Start(); err != nil {
 		return fmt.Errorf("failed to start proxy app connections: %w", err)
@@ -154,7 +154,8 @@ func makeAddrs() (string, string, string) {
 
 // getConfig returns a config for test cases
 func getConfig(t *testing.T) *config.Config {
-	c := config.ResetTestRoot(t.Name())
+	c, err := config.ResetTestRoot(t.Name())
+	require.NoError(t, err)
 
 	// and we use random ports to run in parallel
 	tm, rpc, grpc := makeAddrs()

internal/evidence/reactor_test.go

@@ -397,11 +397,8 @@ func TestReactorBroadcastEvidence_Pending(t *testing.T) {
 	require.Len(t, rts.pools, 2)
 	assert.EqualValues(t, numEvidence, rts.pools[primary.NodeID].Size(),
 		"primary node should have all the evidence")
-	if assert.EqualValues(t, numEvidence, rts.pools[secondary.NodeID].Size(),
-		"secondary nodes should have caught up") {
-
-		rts.assertEvidenceChannelsEmpty(t)
-	}
+	assert.EqualValues(t, numEvidence, rts.pools[secondary.NodeID].Size(),
+		"secondary nodes should have caught up")
 }
 
 func TestReactorBroadcastEvidence_Committed(t *testing.T) {
@@ -441,11 +438,6 @@ func TestReactorBroadcastEvidence_Committed(t *testing.T) {
 	// start the network and ensure it's configured
 	rts.start(t)
 
-	// without the following sleep the test consistently fails;
-	// likely because the sleep forces a context switch that lets
-	// the router process other operations.
-	time.Sleep(2 * time.Millisecond)
-
 	// The secondary reactor should have received all the evidence ignoring the
 	// already committed evidence.
 	rts.waitForEvidence(t, evList[numEvidence/2:], secondary.NodeID)
@@ -453,11 +445,8 @@ func TestReactorBroadcastEvidence_Committed(t *testing.T) {
 	require.Len(t, rts.pools, 2)
 	assert.EqualValues(t, numEvidence, rts.pools[primary.NodeID].Size(),
 		"primary node should have all the evidence")
-	if assert.EqualValues(t, numEvidence/2, rts.pools[secondary.NodeID].Size(),
-		"secondary nodes should have caught up") {
-
-		rts.assertEvidenceChannelsEmpty(t)
-	}
+	assert.EqualValues(t, numEvidence/2, rts.pools[secondary.NodeID].Size(),
+		"secondary nodes should have caught up")
 }
 
 func TestReactorBroadcastEvidence_FullyConnected(t *testing.T) {
@@ -504,7 +493,6 @@ func TestReactorBroadcastEvidence_FullyConnected(t *testing.T) {
 	}
 }
 
-// nolint:lll
 func TestEvidenceListSerialization(t *testing.T) {
 	exampleVote := func(msgType byte) *types.Vote {
 		var stamp, err = time.Parse(types.TimeFormat, "2017-12-25T03:00:01.234Z")

internal/inspect/inspect.go

@@ -40,14 +40,15 @@ type Inspector struct {
 // The Inspector type does not modify the state or block stores.
 // The sinks are used to enable block and transaction querying via the RPC server.
 // The caller is responsible for starting and stopping the Inspector service.
-///
-//nolint:lll
 func New(cfg *config.RPCConfig, bs state.BlockStore, ss state.Store, es []indexer.EventSink, logger log.Logger) *Inspector {
 	routes := rpc.Routes(*cfg, ss, bs, es, logger)
 	eb := types.NewEventBus()
 	eb.SetLogger(logger.With("module", "events"))
-	is := indexer.NewIndexerService(es, eb)
-	is.SetLogger(logger.With("module", "txindex"))
+	is := indexer.NewService(indexer.ServiceArgs{
+		Sinks:    es,
+		EventBus: eb,
+		Logger:   logger.With("module", "txindex"),
+	})
 	return &Inspector{
 		routes:         routes,
 		config:         cfg,

internal/inspect/inspect_test.go

@@ -27,7 +27,8 @@ import (
 )
 
 func TestInspectConstructor(t *testing.T) {
-	cfg := config.ResetTestRoot("test")
+	cfg, err := config.ResetTestRoot("test")
+	require.NoError(t, err)
 	testLogger := log.TestingLogger()
 	t.Cleanup(leaktest.Check(t))
 	defer func() { _ = os.RemoveAll(cfg.RootDir) }()
@@ -41,7 +42,9 @@ func TestInspectConstructor(t *testing.T) {
 }
 
 func TestInspectRun(t *testing.T) {
-	cfg := config.ResetTestRoot("test")
+	cfg, err := config.ResetTestRoot("test")
+	require.NoError(t, err)
+
 	testLogger := log.TestingLogger()
 	t.Cleanup(leaktest.Check(t))
 	defer func() { _ = os.RemoveAll(cfg.RootDir) }()
@@ -111,7 +114,7 @@ func TestBlock(t *testing.T) {
 func TestTxSearch(t *testing.T) {
 	testHash := []byte("test")
 	testTx := []byte("tx")
-	testQuery := fmt.Sprintf("tx.hash='%s'", string(testHash))
+	testQuery := fmt.Sprintf("tx.hash = '%s'", string(testHash))
 	testTxResult := &abcitypes.TxResult{
 		Height: 1,
 		Index:  100,

internal/inspect/rpc/rpc.go

@@ -27,8 +27,6 @@ type Server struct {
 }
 
 // Routes returns the set of routes used by the Inspector server.
-//
-//nolint: lll
 func Routes(cfg config.RPCConfig, s state.Store, bs state.BlockStore, es []indexer.EventSink, logger log.Logger) core.RoutesMap {
 	env := &core.Environment{
 		Config:           cfg,

internal/libs/protoio/io_test.go

@@ -71,7 +71,7 @@ func iotest(writer protoio.WriteCloser, reader protoio.ReadCloser) error {
 			return err
 		}
 		if n != len(bz)+visize {
-			return fmt.Errorf("WriteMsg() wrote %v bytes, expected %v", n, len(bz)+visize) // nolint
+			return fmt.Errorf("WriteMsg() wrote %v bytes, expected %v", n, len(bz)+visize)
 		}
 		lens[i] = n
 	}

internal/libs/protoio/writer.go

@@ -34,6 +34,7 @@ import (
 	"bytes"
 	"encoding/binary"
 	"io"
+	"sync"
 
 	"github.com/gogo/protobuf/proto"
 )
@@ -90,11 +91,44 @@ func (w *varintWriter) Close() error {
 	return nil
 }
 
-func MarshalDelimited(msg proto.Message) ([]byte, error) {
-	var buf bytes.Buffer
-	_, err := NewDelimitedWriter(&buf).WriteMsg(msg)
+func varintWrittenBytes(m marshaler, size int) ([]byte, error) {
+	buf := make([]byte, size+binary.MaxVarintLen64)
+	n := binary.PutUvarint(buf, uint64(size))
+	nw, err := m.MarshalTo(buf[n:])
 	if err != nil {
 		return nil, err
 	}
-	return buf.Bytes(), nil
+	return buf[:n+nw], nil
+}
+
+var bufPool = &sync.Pool{
+	New: func() interface{} {
+		return new(bytes.Buffer)
+	},
+}
+
+func MarshalDelimited(msg proto.Message) ([]byte, error) {
+	// The goal here is to write proto message as is knowning already if
+	// the exact size can be retrieved and if so just use that.
+	if m, ok := msg.(marshaler); ok {
+		size, ok := getSize(msg)
+		if ok {
+			return varintWrittenBytes(m, size)
+		}
+	}
+
+	// Otherwise, go down the route of using proto.Marshal,
+	// and use the buffer pool to retrieve a writer.
+	buf := bufPool.Get().(*bytes.Buffer)
+	defer bufPool.Put(buf)
+	buf.Reset()
+	_, err := NewDelimitedWriter(buf).WriteMsg(msg)
+	if err != nil {
+		return nil, err
+	}
+	// Given that we are reusing buffers, we should
+	// make a copy of the returned bytes.
+	bytesCopy := make([]byte, buf.Len())
+	copy(bytesCopy, buf.Bytes())
+	return bytesCopy, nil
 }

internal/libs/protoio/writer_test.go

@@ -0,0 +1,91 @@
+package protoio_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/gogo/protobuf/proto"
+	"github.com/stretchr/testify/require"
+
+	"github.com/tendermint/tendermint/crypto"
+	"github.com/tendermint/tendermint/crypto/tmhash"
+	"github.com/tendermint/tendermint/internal/libs/protoio"
+	tmproto "github.com/tendermint/tendermint/proto/tendermint/types"
+	"github.com/tendermint/tendermint/types"
+)
+
+func aVote() *types.Vote {
+	var stamp, err = time.Parse(types.TimeFormat, "2017-12-25T03:00:01.234Z")
+	if err != nil {
+		panic(err)
+	}
+
+	return &types.Vote{
+		Type:      tmproto.SignedMsgType(byte(tmproto.PrevoteType)),
+		Height:    12345,
+		Round:     2,
+		Timestamp: stamp,
+		BlockID: types.BlockID{
+			Hash: tmhash.Sum([]byte("blockID_hash")),
+			PartSetHeader: types.PartSetHeader{
+				Total: 1000000,
+				Hash:  tmhash.Sum([]byte("blockID_part_set_header_hash")),
+			},
+		},
+		ValidatorAddress: crypto.AddressHash([]byte("validator_address")),
+		ValidatorIndex:   56789,
+	}
+}
+
+type excludedMarshalTo struct {
+	msg proto.Message
+}
+
+func (emt *excludedMarshalTo) ProtoMessage() {}
+func (emt *excludedMarshalTo) String() string {
+	return emt.msg.String()
+}
+func (emt *excludedMarshalTo) Reset() {
+	emt.msg.Reset()
+}
+func (emt *excludedMarshalTo) Marshal() ([]byte, error) {
+	return proto.Marshal(emt.msg)
+}
+
+var _ proto.Message = (*excludedMarshalTo)(nil)
+
+var sink interface{}
+
+func BenchmarkMarshalDelimitedWithMarshalTo(b *testing.B) {
+	msgs := []proto.Message{
+		aVote().ToProto(),
+	}
+	benchmarkMarshalDelimited(b, msgs)
+}
+
+func BenchmarkMarshalDelimitedNoMarshalTo(b *testing.B) {
+	msgs := []proto.Message{
+		&excludedMarshalTo{aVote().ToProto()},
+	}
+	benchmarkMarshalDelimited(b, msgs)
+}
+
+func benchmarkMarshalDelimited(b *testing.B, msgs []proto.Message) {
+	b.ResetTimer()
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		for _, msg := range msgs {
+			blob, err := protoio.MarshalDelimited(msg)
+			require.Nil(b, err)
+			sink = blob
+		}
+	}
+
+	if sink == nil {
+		b.Fatal("Benchmark did not run")
+	}
+
+	// Reset the sink.
+	sink = (interface{})(nil)
+}

internal/libs/sync/deadlock.go

@@ -1,3 +1,4 @@
+//go:build deadlock
 // +build deadlock
 
 package sync

internal/libs/sync/sync.go

@@ -1,3 +1,4 @@
+//go:build !deadlock
 // +build !deadlock
 
 package sync

internal/mempool/cache.go

@@ -31,14 +31,14 @@ var _ TxCache = (*LRUTxCache)(nil)
 type LRUTxCache struct {
 	mtx      tmsync.Mutex
 	size     int
-	cacheMap map[[TxKeySize]byte]*list.Element
+	cacheMap map[types.TxKey]*list.Element
 	list     *list.List
 }
 
 func NewLRUTxCache(cacheSize int) *LRUTxCache {
 	return &LRUTxCache{
 		size:     cacheSize,
-		cacheMap: make(map[[TxKeySize]byte]*list.Element, cacheSize),
+		cacheMap: make(map[types.TxKey]*list.Element, cacheSize),
 		list:     list.New(),
 	}
 }
@@ -53,7 +53,7 @@ func (c *LRUTxCache) Reset() {
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
 
-	c.cacheMap = make(map[[TxKeySize]byte]*list.Element, c.size)
+	c.cacheMap = make(map[types.TxKey]*list.Element, c.size)
 	c.list.Init()
 }
 
@@ -61,7 +61,7 @@ func (c *LRUTxCache) Push(tx types.Tx) bool {
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
 
-	key := TxKey(tx)
+	key := tx.Key()
 
 	moved, ok := c.cacheMap[key]
 	if ok {
@@ -72,7 +72,7 @@ func (c *LRUTxCache) Push(tx types.Tx) bool {
 	if c.list.Len() >= c.size {
 		front := c.list.Front()
 		if front != nil {
-			frontKey := front.Value.([TxKeySize]byte)
+			frontKey := front.Value.(types.TxKey)
 			delete(c.cacheMap, frontKey)
 			c.list.Remove(front)
 		}
@@ -88,7 +88,7 @@ func (c *LRUTxCache) Remove(tx types.Tx) {
 	c.mtx.Lock()
 	defer c.mtx.Unlock()
 
-	key := TxKey(tx)
+	key := tx.Key()
 	e := c.cacheMap[key]
 	delete(c.cacheMap, key)
 

internal/mempool/ids.go

@@ -7,7 +7,7 @@ import (
 	"github.com/tendermint/tendermint/types"
 )
 
-// nolint: golint
+// nolint: revive
 // TODO: Rename type.
 type MempoolIDs struct {
 	mtx       tmsync.RWMutex

internal/mempool/mempool.go

@@ -32,6 +32,10 @@ type Mempool interface {
 	// its validity and whether it should be added to the mempool.
 	CheckTx(ctx context.Context, tx types.Tx, callback func(*abci.Response), txInfo TxInfo) error
 
+	// RemoveTxByKey removes a transaction, identified by its key,
+	// from the mempool.
+	RemoveTxByKey(txKey types.TxKey) error
+
 	// ReapMaxBytesMaxGas reaps transactions from the mempool up to maxBytes
 	// bytes total with the condition that the total gasWanted must be less than
 	// maxGas.

internal/mempool/mock/mempool.go

@@ -20,6 +20,7 @@ func (Mempool) Size() int { return 0 }
 func (Mempool) CheckTx(_ context.Context, _ types.Tx, _ func(*abci.Response), _ mempool.TxInfo) error {
 	return nil
 }
+func (Mempool) RemoveTxByKey(txKey types.TxKey) error   { return nil }
 func (Mempool) ReapMaxBytesMaxGas(_, _ int64) types.Txs { return types.Txs{} }
 func (Mempool) ReapMaxTxs(n int) types.Txs              { return types.Txs{} }
 func (Mempool) Update(

internal/mempool/tx.go

@@ -1,24 +1,9 @@
 package mempool
 
 import (
-	"crypto/sha256"
-
 	"github.com/tendermint/tendermint/types"
 )
 
-// TxKeySize defines the size of the transaction's key used for indexing.
-const TxKeySize = sha256.Size
-
-// TxKey is the fixed length array key used as an index.
-func TxKey(tx types.Tx) [TxKeySize]byte {
-	return sha256.Sum256(tx)
-}
-
-// TxHashFromBytes returns the hash of a transaction from raw bytes.
-func TxHashFromBytes(tx []byte) []byte {
-	return types.Tx(tx).Hash()
-}
-
 // TxInfo are parameters that get passed when attempting to add a tx to the
 // mempool.
 type TxInfo struct {

internal/mempool/v0/bench_test.go

@@ -6,6 +6,7 @@ import (
 	"sync/atomic"
 	"testing"
 
+	"github.com/stretchr/testify/require"
 	abciclient "github.com/tendermint/tendermint/abci/client"
 	"github.com/tendermint/tendermint/abci/example/kvstore"
 	"github.com/tendermint/tendermint/internal/mempool"
@@ -14,8 +15,10 @@ import (
 func BenchmarkReap(b *testing.B) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(b, err)
 	defer cleanup()
+
 	mp.config.Size = 100000
 
 	size := 10000
@@ -35,7 +38,8 @@ func BenchmarkReap(b *testing.B) {
 func BenchmarkCheckTx(b *testing.B) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(b, err)
 	defer cleanup()
 
 	mp.config.Size = 1000000
@@ -57,7 +61,8 @@ func BenchmarkCheckTx(b *testing.B) {
 func BenchmarkParallelCheckTx(b *testing.B) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(b, err)
 	defer cleanup()
 
 	mp.config.Size = 100000000
@@ -82,7 +87,8 @@ func BenchmarkParallelCheckTx(b *testing.B) {
 func BenchmarkCheckDuplicateTx(b *testing.B) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(b, err)
 	defer cleanup()
 
 	mp.config.Size = 1000000

internal/mempool/v0/cache_test.go

@@ -17,7 +17,8 @@ import (
 func TestCacheAfterUpdate(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(t, err)
 	defer cleanup()
 
 	// reAddIndices & txsInCache can have elements > numTxsToCreate
@@ -61,7 +62,7 @@ func TestCacheAfterUpdate(t *testing.T) {
 			require.NotEqual(t, len(tc.txsInCache), counter,
 				"cache larger than expected on testcase %d", tcIndex)
 
-			nodeVal := node.Value.([sha256.Size]byte)
+			nodeVal := node.Value.(types.TxKey)
 			expectedBz := sha256.Sum256([]byte{byte(tc.txsInCache[len(tc.txsInCache)-counter-1])})
 			// Reference for reading the errors:
 			// >>> sha256('\x00').hexdigest()
@@ -71,7 +72,7 @@ func TestCacheAfterUpdate(t *testing.T) {
 			// >>> sha256('\x02').hexdigest()
 			// 'dbc1b4c900ffe48d575b5da5c638040125f65db0fe3e24494b76ea986457d986'
 
-			require.Equal(t, expectedBz, nodeVal, "Equality failed on index %d, tc %d", counter, tcIndex)
+			require.EqualValues(t, expectedBz, nodeVal, "Equality failed on index %d, tc %d", counter, tcIndex)
 			counter++
 			node = node.Next()
 		}

internal/mempool/v0/clist_mempool.go

@@ -3,7 +3,7 @@ package v0
 import (
 	"bytes"
 	"context"
-	"fmt"
+	"errors"
 	"sync"
 	"sync/atomic"
 
@@ -240,7 +240,7 @@ func (mem *CListMempool) CheckTx(
 		// Note it's possible a tx is still in the cache but no longer in the mempool
 		// (eg. after committing a block, txs are removed from mempool but not cache),
 		// so we only record the sender for txs still in the mempool.
-		if e, ok := mem.txsMap.Load(mempool.TxKey(tx)); ok {
+		if e, ok := mem.txsMap.Load(tx.Key()); ok {
 			memTx := e.(*clist.CElement).Value.(*mempoolTx)
 			_, loaded := memTx.senders.LoadOrStore(txInfo.SenderID, true)
 			// TODO: consider punishing peer for dups,
@@ -327,7 +327,7 @@ func (mem *CListMempool) reqResCb(
 //  - resCbFirstTime (lock not held) if tx is valid
 func (mem *CListMempool) addTx(memTx *mempoolTx) {
 	e := mem.txs.PushBack(memTx)
-	mem.txsMap.Store(mempool.TxKey(memTx.tx), e)
+	mem.txsMap.Store(memTx.tx.Key(), e)
 	atomic.AddInt64(&mem.txsBytes, int64(len(memTx.tx)))
 	mem.metrics.TxSizeBytes.Observe(float64(len(memTx.tx)))
 }
@@ -338,7 +338,7 @@ func (mem *CListMempool) addTx(memTx *mempoolTx) {
 func (mem *CListMempool) removeTx(tx types.Tx, elem *clist.CElement, removeFromCache bool) {
 	mem.txs.Remove(elem)
 	elem.DetachPrev()
-	mem.txsMap.Delete(mempool.TxKey(tx))
+	mem.txsMap.Delete(tx.Key())
 	atomic.AddInt64(&mem.txsBytes, int64(-len(tx)))
 
 	if removeFromCache {
@@ -347,13 +347,16 @@ func (mem *CListMempool) removeTx(tx types.Tx, elem *clist.CElement, removeFromC
 }
 
 // RemoveTxByKey removes a transaction from the mempool by its TxKey index.
-func (mem *CListMempool) RemoveTxByKey(txKey [mempool.TxKeySize]byte, removeFromCache bool) {
+func (mem *CListMempool) RemoveTxByKey(txKey types.TxKey) error {
 	if e, ok := mem.txsMap.Load(txKey); ok {
 		memTx := e.(*clist.CElement).Value.(*mempoolTx)
 		if memTx != nil {
-			mem.removeTx(memTx.tx, e.(*clist.CElement), removeFromCache)
+			mem.removeTx(memTx.tx, e.(*clist.CElement), false)
+			return nil
 		}
+		return errors.New("transaction not found")
 	}
+	return errors.New("invalid transaction found")
 }
 
 func (mem *CListMempool) isFull(txSize int) error {
@@ -409,7 +412,7 @@ func (mem *CListMempool) resCbFirstTime(
 			mem.addTx(memTx)
 			mem.logger.Debug(
 				"added good transaction",
-				"tx", mempool.TxHashFromBytes(tx),
+				"tx", types.Tx(tx).Hash(),
 				"res", r,
 				"height", memTx.height,
 				"total", mem.Size(),
@@ -419,7 +422,7 @@ func (mem *CListMempool) resCbFirstTime(
 			// ignore bad transaction
 			mem.logger.Debug(
 				"rejected bad transaction",
-				"tx", mempool.TxHashFromBytes(tx),
+				"tx", types.Tx(tx).Hash(),
 				"peerID", peerP2PID,
 				"res", r,
 				"err", postCheckErr,
@@ -446,12 +449,35 @@ func (mem *CListMempool) resCbRecheck(req *abci.Request, res *abci.Response) {
 	case *abci.Response_CheckTx:
 		tx := req.GetCheckTx().Tx
 		memTx := mem.recheckCursor.Value.(*mempoolTx)
-		if !bytes.Equal(tx, memTx.tx) {
-			panic(fmt.Sprintf(
-				"Unexpected tx response from proxy during recheck\nExpected %X, got %X",
-				memTx.tx,
-				tx))
+
+		// Search through the remaining list of tx to recheck for a transaction that matches
+		// the one we received from the ABCI application.
+		for {
+			if bytes.Equal(tx, memTx.tx) {
+				// We've found a tx in the recheck list that matches the tx that we
+				// received from the ABCI application.
+				// Break, and use this transaction for further checks.
+				break
+			}
+
+			mem.logger.Error(
+				"re-CheckTx transaction mismatch",
+				"got", types.Tx(tx),
+				"expected", memTx.tx,
+			)
+
+			if mem.recheckCursor == mem.recheckEnd {
+				// we reached the end of the recheckTx list without finding a tx
+				// matching the one we received from the ABCI application.
+				// Return without processing any tx.
+				mem.recheckCursor = nil
+				return
+			}
+
+			mem.recheckCursor = mem.recheckCursor.Next()
+			memTx = mem.recheckCursor.Value.(*mempoolTx)
 		}
+
 		var postCheckErr error
 		if mem.postCheck != nil {
 			postCheckErr = mem.postCheck(tx, r.CheckTx)
@@ -460,7 +486,7 @@ func (mem *CListMempool) resCbRecheck(req *abci.Request, res *abci.Response) {
 			// Good, nothing to do.
 		} else {
 			// Tx became invalidated due to newly committed block.
-			mem.logger.Debug("tx is no longer valid", "tx", mempool.TxHashFromBytes(tx), "res", r, "err", postCheckErr)
+			mem.logger.Debug("tx is no longer valid", "tx", types.Tx(tx).Hash(), "res", r, "err", postCheckErr)
 			// NOTE: we remove tx from the cache because it might be good later
 			mem.removeTx(tx, mem.recheckCursor, !mem.config.KeepInvalidTxsInCache)
 		}
@@ -598,7 +624,7 @@ func (mem *CListMempool) Update(
 		// Mempool after:
 		//   100
 		// https://github.com/tendermint/tendermint/issues/3322.
-		if e, ok := mem.txsMap.Load(mempool.TxKey(tx)); ok {
+		if e, ok := mem.txsMap.Load(tx.Key()); ok {
 			mem.removeTx(tx, e.(*clist.CElement), false)
 		}
 	}

internal/mempool/v0/clist_mempool_test.go

@@ -13,9 +13,11 @@ import (
 	"github.com/gogo/protobuf/proto"
 	gogotypes "github.com/gogo/protobuf/types"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 
 	abciclient "github.com/tendermint/tendermint/abci/client"
+	abciclimocks "github.com/tendermint/tendermint/abci/client/mocks"
 	"github.com/tendermint/tendermint/abci/example/kvstore"
 	abciserver "github.com/tendermint/tendermint/abci/server"
 	abci "github.com/tendermint/tendermint/abci/types"
@@ -31,8 +33,14 @@ import (
 // test.
 type cleanupFunc func()
 
-func newMempoolWithApp(cc abciclient.Creator) (*CListMempool, cleanupFunc) {
-	return newMempoolWithAppAndConfig(cc, config.ResetTestRoot("mempool_test"))
+func newMempoolWithApp(cc abciclient.Creator) (*CListMempool, cleanupFunc, error) {
+	conf, err := config.ResetTestRoot("mempool_test")
+	if err != nil {
+		return nil, func() {}, err
+	}
+
+	mp, cu := newMempoolWithAppAndConfig(cc, conf)
+	return mp, cu, nil
 }
 
 func newMempoolWithAppAndConfig(cc abciclient.Creator, cfg *config.Config) (*CListMempool, cleanupFunc) {
@@ -93,7 +101,8 @@ func checkTxs(t *testing.T, mp mempool.Mempool, count int, peerID uint16) types.
 func TestReapMaxBytesMaxGas(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(t, err)
 	defer cleanup()
 
 	// Ensure gas calculation behaves as expected
@@ -142,7 +151,8 @@ func TestReapMaxBytesMaxGas(t *testing.T) {
 func TestMempoolFilters(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(t, err)
 	defer cleanup()
 	emptyTxArr := []types.Tx{[]byte{}}
 
@@ -181,7 +191,8 @@ func TestMempoolFilters(t *testing.T) {
 func TestMempoolUpdate(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(t, err)
 	defer cleanup()
 
 	// 1. Adds valid txs to the cache
@@ -214,6 +225,58 @@ func TestMempoolUpdate(t *testing.T) {
 	}
 }
 
+func TestMempoolUpdateDoesNotPanicWhenApplicationMissedTx(t *testing.T) {
+	var callback abciclient.Callback
+	mockClient := new(abciclimocks.Client)
+	mockClient.On("Start").Return(nil)
+	mockClient.On("SetLogger", mock.Anything)
+
+	mockClient.On("Error").Return(nil).Times(4)
+	mockClient.On("FlushAsync", mock.Anything).Return(abciclient.NewReqRes(abci.ToRequestFlush()), nil)
+	mockClient.On("SetResponseCallback", mock.MatchedBy(func(cb abciclient.Callback) bool { callback = cb; return true }))
+
+	cc := func() (abciclient.Client, error) {
+		return mockClient, nil
+	}
+
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(t, err)
+	defer cleanup()
+
+	// Add 4 transactions to the mempool by calling the mempool's `CheckTx` on each of them.
+	txs := []types.Tx{[]byte{0x01}, []byte{0x02}, []byte{0x03}, []byte{0x04}}
+	for _, tx := range txs {
+		reqRes := abciclient.NewReqRes(abci.ToRequestCheckTx(abci.RequestCheckTx{Tx: tx}))
+		reqRes.Response = abci.ToResponseCheckTx(abci.ResponseCheckTx{Code: abci.CodeTypeOK})
+		// SetDone allows the ReqRes to process its callback synchronously.
+		// This simulates the Response being ready for the client immediately.
+		reqRes.SetDone()
+
+		mockClient.On("CheckTxAsync", mock.Anything, mock.Anything).Return(reqRes, nil)
+		err := mp.CheckTx(context.Background(), tx, nil, mempool.TxInfo{})
+		require.NoError(t, err)
+	}
+
+	// Calling update to remove the first transaction from the mempool.
+	// This call also triggers the mempool to recheck its remaining transactions.
+	err = mp.Update(0, []types.Tx{txs[0]}, abciResponses(1, abci.CodeTypeOK), nil, nil)
+	require.Nil(t, err)
+
+	// The mempool has now sent its requests off to the client to be rechecked
+	// and is waiting for the corresponding callbacks to be called.
+	// We now call the mempool-supplied callback on the first and third transaction.
+	// This simulates the client dropping the second request.
+	// Previous versions of this code panicked when the ABCI application missed
+	// a recheck-tx request.
+	resp := abci.ResponseCheckTx{Code: abci.CodeTypeOK}
+	req := abci.RequestCheckTx{Tx: txs[1]}
+	callback(abci.ToRequestCheckTx(req), abci.ToResponseCheckTx(resp))
+
+	req = abci.RequestCheckTx{Tx: txs[3]}
+	callback(abci.ToRequestCheckTx(req), abci.ToResponseCheckTx(resp))
+	mockClient.AssertExpectations(t)
+}
+
 func TestMempool_KeepInvalidTxsInCache(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
@@ -265,7 +328,8 @@ func TestMempool_KeepInvalidTxsInCache(t *testing.T) {
 func TestTxsAvailable(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(t, err)
 	defer cleanup()
 	mp.EnableTxsAvailable()
 
@@ -294,7 +358,7 @@ func TestTxsAvailable(t *testing.T) {
 	ensureNoFire(t, mp.TxsAvailable(), timeoutMS)
 
 	// now call update with all the txs. it should not fire as there are no txs left
-	committedTxs = append(txs, moreTxs...) //nolint: gocritic
+	committedTxs = append(txs, moreTxs...)
 	if err := mp.Update(2, committedTxs, abciResponses(len(committedTxs), abci.CodeTypeOK), nil, nil); err != nil {
 		t.Error(err)
 	}
@@ -310,12 +374,13 @@ func TestSerialReap(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
 
-	mp, cleanup := newMempoolWithApp(cc)
+	mp, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(t, err)
 	defer cleanup()
 
 	appConnCon, _ := cc()
 	appConnCon.SetLogger(log.TestingLogger().With("module", "abci-client", "connection", "consensus"))
-	err := appConnCon.Start()
+	err = appConnCon.Start()
 	require.Nil(t, err)
 
 	cacheMap := make(map[string]struct{})
@@ -420,7 +485,8 @@ func TestSerialReap(t *testing.T) {
 func TestMempool_CheckTxChecksTxSize(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	mempl, cleanup := newMempoolWithApp(cc)
+	mempl, cleanup, err := newMempoolWithApp(cc)
+	require.NoError(t, err)
 	defer cleanup()
 
 	maxTxSize := mempl.config.MaxTxBytes
@@ -465,7 +531,9 @@ func TestMempool_CheckTxChecksTxSize(t *testing.T) {
 func TestMempoolTxsBytes(t *testing.T) {
 	app := kvstore.NewApplication()
 	cc := abciclient.NewLocalCreator(app)
-	cfg := config.ResetTestRoot("mempool_test")
+	cfg, err := config.ResetTestRoot("mempool_test")
+	require.NoError(t, err)
+
 	cfg.Mempool.MaxTxsBytes = 10
 	mp, cleanup := newMempoolWithAppAndConfig(cc, cfg)
 	defer cleanup()
@@ -474,7 +542,7 @@ func TestMempoolTxsBytes(t *testing.T) {
 	assert.EqualValues(t, 0, mp.SizeBytes())
 
 	// 2. len(tx) after CheckTx
-	err := mp.CheckTx(context.Background(), []byte{0x01}, nil, mempool.TxInfo{})
+	err = mp.CheckTx(context.Background(), []byte{0x01}, nil, mempool.TxInfo{})
 	require.NoError(t, err)
 	assert.EqualValues(t, 1, mp.SizeBytes())
 
@@ -508,7 +576,8 @@ func TestMempoolTxsBytes(t *testing.T) {
 	// 6. zero after tx is rechecked and removed due to not being valid anymore
 	app2 := kvstore.NewApplication()
 	cc = abciclient.NewLocalCreator(app2)
-	mp, cleanup = newMempoolWithApp(cc)
+	mp, cleanup, err = newMempoolWithApp(cc)
+	require.NoError(t, err)
 	defer cleanup()
 
 	txBytes := make([]byte, 8)
@@ -544,9 +613,9 @@ func TestMempoolTxsBytes(t *testing.T) {
 	err = mp.CheckTx(context.Background(), []byte{0x06}, nil, mempool.TxInfo{})
 	require.NoError(t, err)
 	assert.EqualValues(t, 9, mp.SizeBytes())
-	mp.RemoveTxByKey(mempool.TxKey([]byte{0x07}), true)
+	assert.Error(t, mp.RemoveTxByKey(types.Tx([]byte{0x07}).Key()))
 	assert.EqualValues(t, 9, mp.SizeBytes())
-	mp.RemoveTxByKey(mempool.TxKey([]byte{0x06}), true)
+	assert.NoError(t, mp.RemoveTxByKey(types.Tx([]byte{0x06}).Key()))
 	assert.EqualValues(t, 8, mp.SizeBytes())
 
 }
@@ -564,7 +633,9 @@ func TestMempoolRemoteAppConcurrency(t *testing.T) {
 			t.Error(err)
 		}
 	})
-	cfg := config.ResetTestRoot("mempool_test")
+	cfg, err := config.ResetTestRoot("mempool_test")
+	require.NoError(t, err)
+
 	mp, cleanup := newMempoolWithAppAndConfig(cc, cfg)
 	defer cleanup()
 
@@ -587,7 +658,7 @@ func TestMempoolRemoteAppConcurrency(t *testing.T) {
 		// this will err with ErrTxInCache many times ...
 		mp.CheckTx(context.Background(), tx, nil, mempool.TxInfo{SenderID: uint16(peerID)}) //nolint: errcheck // will error
 	}
-	err := mp.FlushAppConn()
+	err = mp.FlushAppConn()
 	require.NoError(t, err)
 }
 

internal/mempool/v0/reactor.go

@@ -171,7 +171,7 @@ func (r *Reactor) handleMempoolMessage(envelope p2p.Envelope) error {
 
 		for _, tx := range protoTxs {
 			if err := r.mempool.CheckTx(context.Background(), types.Tx(tx), nil, txInfo); err != nil {
-				logger.Error("checktx failed for tx", "tx", fmt.Sprintf("%X", mempool.TxHashFromBytes(tx)), "err", err)
+				logger.Error("checktx failed for tx", "tx", fmt.Sprintf("%X", types.Tx(tx).Hash()), "err", err)
 			}
 		}
 
@@ -378,7 +378,7 @@ func (r *Reactor) broadcastTxRoutine(peerID types.NodeID, closer *tmsync.Closer)
 			}
 			r.Logger.Debug(
 				"gossiped tx to peer",
-				"tx", fmt.Sprintf("%X", mempool.TxHashFromBytes(memTx.tx)),
+				"tx", fmt.Sprintf("%X", memTx.tx.Hash()),
 				"peer", peerID,
 			)
 		}

internal/mempool/v0/reactor_test.go

@@ -57,7 +57,8 @@ func setup(t *testing.T, config *config.MempoolConfig, numNodes int, chBuf uint)
 		rts.kvstores[nodeID] = kvstore.NewApplication()
 		cc := abciclient.NewLocalCreator(rts.kvstores[nodeID])
 
-		mempool, memCleanup := newMempoolWithApp(cc)
+		mempool, memCleanup, err := newMempoolWithApp(cc)
+		require.NoError(t, err)
 		t.Cleanup(memCleanup)
 		mempool.SetLogger(rts.logger)
 		rts.mempools[nodeID] = mempool

internal/mempool/v1/mempool.go

@@ -3,7 +3,9 @@ package v1
 import (
 	"bytes"
 	"context"
+	"errors"
 	"fmt"
+	"reflect"
 	"sync/atomic"
 	"time"
 
@@ -256,7 +258,7 @@ func (txmp *TxMempool) CheckTx(
 		return err
 	}
 
-	txHash := mempool.TxKey(tx)
+	txHash := tx.Key()
 
 	// We add the transaction to the mempool's cache and if the transaction already
 	// exists, i.e. false is returned, then we check if we've seen this transaction
@@ -304,6 +306,19 @@ func (txmp *TxMempool) CheckTx(
 	return nil
 }
 
+func (txmp *TxMempool) RemoveTxByKey(txKey types.TxKey) error {
+	txmp.Lock()
+	defer txmp.Unlock()
+
+	// remove the committed transaction from the transaction store and indexes
+	if wtx := txmp.txStore.GetTxByHash(txKey); wtx != nil {
+		txmp.removeTx(wtx, false)
+		return nil
+	}
+
+	return errors.New("transaction not found")
+}
+
 // Flush flushes out the mempool. It acquires a read-lock, fetches all the
 // transactions currently in the transaction store and removes each transaction
 // from the store and all indexes and finally resets the cache.
@@ -451,7 +466,7 @@ func (txmp *TxMempool) Update(
 		}
 
 		// remove the committed transaction from the transaction store and indexes
-		if wtx := txmp.txStore.GetTxByHash(mempool.TxKey(tx)); wtx != nil {
+		if wtx := txmp.txStore.GetTxByHash(tx.Key()); wtx != nil {
 			txmp.removeTx(wtx, false)
 		}
 	}
@@ -625,58 +640,88 @@ func (txmp *TxMempool) defaultTxCallback(req *abci.Request, res *abci.Response)
 	txmp.metrics.RecheckTimes.Add(1)
 
 	checkTxRes, ok := res.Value.(*abci.Response_CheckTx)
-	if ok {
-		tx := req.GetCheckTx().Tx
-		wtx := txmp.recheckCursor.Value.(*WrappedTx)
-		if !bytes.Equal(tx, wtx.tx) {
-			panic(fmt.Sprintf("re-CheckTx transaction mismatch; got: %X, expected: %X", wtx.tx.Hash(), mempool.TxKey(tx)))
-		}
-
-		// Only evaluate transactions that have not been removed. This can happen
-		// if an existing transaction is evicted during CheckTx and while this
-		// callback is being executed for the same evicted transaction.
-		if !txmp.txStore.IsTxRemoved(wtx.hash) {
-			var err error
-			if txmp.postCheck != nil {
-				err = txmp.postCheck(tx, checkTxRes.CheckTx)
-			}
-
-			if checkTxRes.CheckTx.Code == abci.CodeTypeOK && err == nil {
-				wtx.priority = checkTxRes.CheckTx.Priority
-			} else {
-				txmp.logger.Debug(
-					"existing transaction no longer valid; failed re-CheckTx callback",
-					"priority", wtx.priority,
-					"tx", fmt.Sprintf("%X", mempool.TxHashFromBytes(wtx.tx)),
-					"err", err,
-					"code", checkTxRes.CheckTx.Code,
-				)
-
-				if wtx.gossipEl != txmp.recheckCursor {
-					panic("corrupted reCheckTx cursor")
-				}
-
-				txmp.removeTx(wtx, !txmp.config.KeepInvalidTxsInCache)
-			}
-		}
-
-		// move reCheckTx cursor to next element
-		if txmp.recheckCursor == txmp.recheckEnd {
-			txmp.recheckCursor = nil
-		} else {
-			txmp.recheckCursor = txmp.recheckCursor.Next()
-		}
-
-		if txmp.recheckCursor == nil {
-			txmp.logger.Debug("finished rechecking transactions")
-
-			if txmp.Size() > 0 {
-				txmp.notifyTxsAvailable()
-			}
-		}
-
-		txmp.metrics.Size.Set(float64(txmp.Size()))
+	if !ok {
+		txmp.logger.Error("received incorrect type in mempool callback",
+			"expected", reflect.TypeOf(&abci.Response_CheckTx{}).Name(),
+			"got", reflect.TypeOf(res.Value).Name(),
+		)
+		return
 	}
+	tx := req.GetCheckTx().Tx
+	wtx := txmp.recheckCursor.Value.(*WrappedTx)
+
+	// Search through the remaining list of tx to recheck for a transaction that matches
+	// the one we received from the ABCI application.
+	for {
+		if bytes.Equal(tx, wtx.tx) {
+			// We've found a tx in the recheck list that matches the tx that we
+			// received from the ABCI application.
+			// Break, and use this transaction for further checks.
+			break
+		}
+
+		txmp.logger.Error(
+			"re-CheckTx transaction mismatch",
+			"got", wtx.tx.Hash(),
+			"expected", types.Tx(tx).Key(),
+		)
+
+		if txmp.recheckCursor == txmp.recheckEnd {
+			// we reached the end of the recheckTx list without finding a tx
+			// matching the one we received from the ABCI application.
+			// Return without processing any tx.
+			txmp.recheckCursor = nil
+			return
+		}
+
+		txmp.recheckCursor = txmp.recheckCursor.Next()
+		wtx = txmp.recheckCursor.Value.(*WrappedTx)
+	}
+
+	// Only evaluate transactions that have not been removed. This can happen
+	// if an existing transaction is evicted during CheckTx and while this
+	// callback is being executed for the same evicted transaction.
+	if !txmp.txStore.IsTxRemoved(wtx.hash) {
+		var err error
+		if txmp.postCheck != nil {
+			err = txmp.postCheck(tx, checkTxRes.CheckTx)
+		}
+
+		if checkTxRes.CheckTx.Code == abci.CodeTypeOK && err == nil {
+			wtx.priority = checkTxRes.CheckTx.Priority
+		} else {
+			txmp.logger.Debug(
+				"existing transaction no longer valid; failed re-CheckTx callback",
+				"priority", wtx.priority,
+				"tx", fmt.Sprintf("%X", wtx.tx.Hash()),
+				"err", err,
+				"code", checkTxRes.CheckTx.Code,
+			)
+
+			if wtx.gossipEl != txmp.recheckCursor {
+				panic("corrupted reCheckTx cursor")
+			}
+
+			txmp.removeTx(wtx, !txmp.config.KeepInvalidTxsInCache)
+		}
+	}
+
+	// move reCheckTx cursor to next element
+	if txmp.recheckCursor == txmp.recheckEnd {
+		txmp.recheckCursor = nil
+	} else {
+		txmp.recheckCursor = txmp.recheckCursor.Next()
+	}
+
+	if txmp.recheckCursor == nil {
+		txmp.logger.Debug("finished rechecking transactions")
+
+		if txmp.Size() > 0 {
+			txmp.notifyTxsAvailable()
+		}
+	}
+
+	txmp.metrics.Size.Set(float64(txmp.Size()))
 }
 
 // updateReCheckTxs updates the recheck cursors by using the gossipIndex. For
@@ -784,13 +829,13 @@ func (txmp *TxMempool) removeTx(wtx *WrappedTx, removeFromCache bool) {
 // the height and time based indexes.
 func (txmp *TxMempool) purgeExpiredTxs(blockHeight int64) {
 	now := time.Now()
-	expiredTxs := make(map[[mempool.TxKeySize]byte]*WrappedTx)
+	expiredTxs := make(map[types.TxKey]*WrappedTx)
 
 	if txmp.config.TTLNumBlocks > 0 {
 		purgeIdx := -1
 		for i, wtx := range txmp.heightIndex.txs {
 			if (blockHeight - wtx.height) > txmp.config.TTLNumBlocks {
-				expiredTxs[mempool.TxKey(wtx.tx)] = wtx
+				expiredTxs[wtx.tx.Key()] = wtx
 				purgeIdx = i
 			} else {
 				// since the index is sorted, we know no other txs can be be purged
@@ -807,7 +852,7 @@ func (txmp *TxMempool) purgeExpiredTxs(blockHeight int64) {
 		purgeIdx := -1
 		for i, wtx := range txmp.timestampIndex.txs {
 			if now.Sub(wtx.timestamp) > txmp.config.TTLDuration {
-				expiredTxs[mempool.TxKey(wtx.tx)] = wtx
+				expiredTxs[wtx.tx.Key()] = wtx
 				purgeIdx = i
 			} else {
 				// since the index is sorted, we know no other txs can be be purged