PrepareProposal-VoteExtension integration (#6915)

* add proto, add boilerplates

* add canonical

* fix tests

* add vote signing test

* Update internal/consensus/msgs_test.go

* modify state execution in progress

* add extension signing

* add extension signing

* VoteExtension -> ExtendVote

* modify state execution in progress

* add extension signing

* verify in progress

* modify CommitSig

* fix test

* apply review

* update data structures

* Apply suggestions from code review

* Add comments

* fix test

* VoteExtensionSigned => VoteExtensionToSigned

* Apply suggestions from code review

Co-authored-by: Aleksandr Bezobchuk <alexanderbez@users.noreply.github.com>

* *Signed -> *ToSign

* add Vote to RequestExtendVote

* add example VoteExtension

* apply reviews

* fix vote

* Apply suggestions from code review

Co-authored-by: Dev Ojha <ValarDragon@users.noreply.github.com>
Co-authored-by: Aleksandr Bezobchuk <alexanderbez@users.noreply.github.com>

* fix typo, modify proto

* add abcipp_kvstore.go

* add extension test

* fix test

* fix test

* fix test

* fit lint

* uncomment test

* refactor test in progress

* gofmt

* apply review

* fix lint

Co-authored-by: Aleksandr Bezobchuk <alexanderbez@users.noreply.github.com>
Co-authored-by: Dev Ojha <ValarDragon@users.noreply.github.com>

.github/CODEOWNERS

@@ -7,5 +7,4 @@
 # global owners are only requested if there isn't a more specific
 # codeowner specified below. For this reason, the global codeowners
 # are often repeated in package-level definitions.
-*       @alexanderbez @ebuchman @cmwaters @tessr @tychoish @williambanfield
-
+*       @alexanderbez @ebuchman @cmwaters @tessr @tychoish @williambanfield @creachadair

.github/workflows/coverage.yml

@@ -46,7 +46,7 @@ jobs:
         with:
           go-version: "1.16"
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go
@@ -68,7 +68,7 @@ jobs:
         with:
           go-version: "1.16"
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go
@@ -96,7 +96,7 @@ jobs:
     needs: tests
     steps:
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go
@@ -121,7 +121,7 @@ jobs:
       - run: |
           cat ./*profile.out | grep -v "mode: atomic" >> coverage.txt
         if: env.GIT_DIFF
-      - uses: codecov/codecov-action@v2.0.1
+      - uses: codecov/codecov-action@v2.0.3
         with:
           file: ./coverage.txt
         if: env.GIT_DIFF

.github/workflows/docker.yml

@@ -50,7 +50,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Publish to Docker Hub
-        uses: docker/build-push-action@v2.6.1
+        uses: docker/build-push-action@v2.7.0
         with:
           context: .
           file: ./DOCKER/Dockerfile

.github/workflows/e2e.yml

@@ -18,7 +18,7 @@ jobs:
         with:
           go-version: '1.16'
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go

.github/workflows/fuzz-nightly.yml

@@ -23,9 +23,14 @@ jobs:
         working-directory: test/fuzz
         run: go get -u github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-build
 
-      - name: Fuzz mempool
+      - name: Fuzz mempool-v1
         working-directory: test/fuzz
-        run: timeout -s SIGINT --preserve-status 10m make fuzz-mempool
+        run: timeout -s SIGINT --preserve-status 10m make fuzz-mempool-v1
+        continue-on-error: true
+
+      - name: Fuzz mempool-v0
+        working-directory: test/fuzz
+        run: timeout -s SIGINT --preserve-status 10m make fuzz-mempool-v0
         continue-on-error: true
 
       - name: Fuzz p2p-addrbook

.github/workflows/janitor.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 3
     steps:
-      - uses: styfle/cancel-workflow-action@0.9.0
+      - uses: styfle/cancel-workflow-action@0.9.1
         with:
           workflow_id: 1041851,1401230,2837803
           access_token: ${{ github.token }}

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
     timeout-minutes: 8
     steps:
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go

.github/workflows/proto-docker.yml

@@ -43,7 +43,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Publish to Docker Hub
-        uses: docker/build-push-action@v2.6.1
+        uses: docker/build-push-action@v2.7.0
         with:
           context: ./tools/proto
           file: ./tools/proto/Dockerfile

.github/workflows/release.yml

@@ -2,7 +2,7 @@ name: "Release"
 
 on:
   push:
-    branches: 
+    branches:
       - "RC[0-9]/**"
     tags:
       - "v[0-9]+.[0-9]+.[0-9]+" # Push events to matching v*, i.e. v1.0, v20.15.10
@@ -20,9 +20,6 @@ jobs:
         with:
           go-version: '1.16'
 
-      - run: echo https://github.com/tendermint/tendermint/blob/${GITHUB_REF#refs/tags/}/CHANGELOG.md#${GITHUB_REF#refs/tags/} > ../release_notes.md 
-        if: startsWith(github.ref, 'refs/tags/')
-
       - name: Build
         uses: goreleaser/goreleaser-action@v2
         if: ${{ github.event_name == 'pull_request' }}
@@ -35,6 +32,6 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/')
         with:
           version: latest
-          args: release --rm-dist --release-notes=../release_notes.md
+          args: release --rm-dist
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/stale.yml

@@ -14,6 +14,7 @@ jobs:
     recent activity. It will be closed if no further activity occurs. Thank you
     for your contributions."
           days-before-stale: -1
+          days-before-close: -1
           days-before-pr-stale: 10
           days-before-pr-close: 4
           exempt-pr-labels: "S:wip"

.github/workflows/tests.yml

@@ -19,7 +19,7 @@ jobs:
         with:
           go-version: "1.16"
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go
@@ -51,7 +51,7 @@ jobs:
         with:
           go-version: "1.16"
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go
@@ -82,7 +82,7 @@ jobs:
         with:
           go-version: "1.16"
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v5
         with:
           PATTERNS: |
             **/**.go

.golangci.yml

@@ -26,7 +26,7 @@ linters:
     # - maligned
     - nakedret
     - prealloc
-    - scopelint
+    - exportloopref
     - staticcheck
     - structcheck
     - stylecheck

CHANGELOG.md

@@ -2,6 +2,27 @@
 
 Friendly reminder, we have a [bug bounty program](https://hackerone.com/tendermint).
 
+## v0.34.12
+
+*August 17, 2021*
+
+Special thanks to external contributors on this release: @JayT106.
+
+### FEATURES
+
+- [rpc] [\#6717](https://github.com/tendermint/tendermint/pull/6717) introduce
+  `/genesis_chunked` rpc endpoint for handling large genesis files by chunking them (@tychoish)
+
+### IMPROVEMENTS
+
+- [rpc] [\#6825](https://github.com/tendermint/tendermint/issues/6825) Remove egregious INFO log from `ABCI#Query` RPC. (@alexanderbez)
+
+### BUG FIXES
+
+- [light] [\#6685](https://github.com/tendermint/tendermint/pull/6685) fix bug
+  with incorrectly handling contexts that would occasionally freeze state sync. (@cmwaters)
+- [privval] [\#6748](https://github.com/tendermint/tendermint/issues/6748) Fix vote timestamp to prevent chain halt (@JayT106)
+
 ## v0.34.11
 
 *June 18, 2021*
@@ -12,25 +33,25 @@ adding two new parameters to the state sync config.
 ### BREAKING CHANGES
 
 - Apps
-    - [Version] \#6494 `TMCoreSemVer` is not required to be set as a ldflag any longer.
+    - [Version] [\#6494](https://github.com/tendermint/tendermint/pull/6494) `TMCoreSemVer` is not required to be set as a ldflag any longer.
 
 ### IMPROVEMENTS
 
-- [statesync] \#6566 Allow state sync fetchers and request timeout to be configurable. (@alexanderbez)
-- [statesync] \#6378 Retry requests for snapshots and add a minimum discovery time (5s) for new snapshots. (@tychoish)
-- [statesync] \#6582 Increase chunk priority and add multiple retry chunk requests (@cmwaters)
+- [statesync] [\#6566](https://github.com/tendermint/tendermint/pull/6566) Allow state sync fetchers and request timeout to be configurable. (@alexanderbez)
+- [statesync] [\#6378](https://github.com/tendermint/tendermint/pull/6378) Retry requests for snapshots and add a minimum discovery time (5s) for new snapshots. (@tychoish)
+- [statesync] [\#6582](https://github.com/tendermint/tendermint/pull/6582) Increase chunk priority and add multiple retry chunk requests (@cmwaters)
 
 ### BUG FIXES
 
-- [evidence] \#6375 Fix bug with inconsistent LightClientAttackEvidence hashing (@cmwaters)
+- [evidence] [\#6375](https://github.com/tendermint/tendermint/pull/6375) Fix bug with inconsistent LightClientAttackEvidence hashing (@cmwaters)
 
 ## v0.34.10
 
 *April 14, 2021*
 
-This release fixes a bug where peers would sometimes try to send messages 
+This release fixes a bug where peers would sometimes try to send messages
 on incorrect channels. Special thanks to our friends at Oasis Labs for surfacing
-this issue! 
+this issue!
 
 - [p2p/node] [\#6339](https://github.com/tendermint/tendermint/issues/6339) Fix bug with using custom channels (@cmwaters)
 - [light] [\#6346](https://github.com/tendermint/tendermint/issues/6346) Correctly handle too high errors to improve client robustness (@cmwaters)
@@ -39,7 +60,7 @@ this issue!
 
 *April 8, 2021*
 
-This release fixes a moderate severity security issue, Security Advisory Alderfly, 
+This release fixes a moderate severity security issue, Security Advisory Alderfly,
 which impacts all networks that rely on Tendermint light clients.
 Further details will be released once networks have upgraded.
 
@@ -112,7 +133,7 @@ shout-out to @marbar3778 for diagnosing it quickly.
 
 ## v0.34.6
 
-*February 18, 2021* 
+*February 18, 2021*
 
 _Tendermint Core v0.34.5 and v0.34.6 have been recalled due to release tooling problems._
 
@@ -120,9 +141,9 @@ _Tendermint Core v0.34.5 and v0.34.6 have been recalled due to release tooling p
 
 *February 11, 2021*
 
-This release includes a fix for a memory leak in the evidence reactor (see #6068, below). 
-All Tendermint clients are recommended to upgrade. 
-Thank you to our friends at Crypto.com for the initial report of this memory leak! 
+This release includes a fix for a memory leak in the evidence reactor (see #6068, below).
+All Tendermint clients are recommended to upgrade.
+Thank you to our friends at Crypto.com for the initial report of this memory leak!
 
 Special thanks to other external contributors on this release: @yayajacky, @odidev, @laniehei, and @c29r3!
 
@@ -132,17 +153,17 @@ Special thanks to other external contributors on this release: @yayajacky, @odid
 - [light] [\#6026](https://github.com/tendermint/tendermint/pull/6026) Fix a bug when height isn't provided for the rpc calls: `/commit` and `/validators` (@cmwaters)
 - [evidence] [\#6068](https://github.com/tendermint/tendermint/pull/6068) Terminate broadcastEvidenceRoutine when peer is stopped (@melekes)
 
-## v0.34.3 
+## v0.34.3
 
 *January 19, 2021*
 
-This release includes a fix for a high-severity security vulnerability, 
+This release includes a fix for a high-severity security vulnerability,
 a DoS-vector that impacted Tendermint Core v0.34.0-v0.34.2. For more details, see
-[Security Advisory Mulberry](https://github.com/tendermint/tendermint/security/advisories/GHSA-p658-8693-mhvg) 
-or https://nvd.nist.gov/vuln/detail/CVE-2021-21271. 
+[Security Advisory Mulberry](https://github.com/tendermint/tendermint/security/advisories/GHSA-p658-8693-mhvg)
+or https://nvd.nist.gov/vuln/detail/CVE-2021-21271.
 
 Tendermint Core v0.34.3 also updates GoGo Protobuf to 1.3.2 in order to pick up the fix for
-https://nvd.nist.gov/vuln/detail/CVE-2021-3121. 
+https://nvd.nist.gov/vuln/detail/CVE-2021-3121.
 
 ### BUG FIXES
 
@@ -234,14 +255,14 @@ Special thanks to external contributors on this release: @james-ray, @fedekunze,
   - [blockchain] [\#4637](https://github.com/tendermint/tendermint/pull/4637) Migrate blockchain reactor(s) to Protobuf encoding (@marbar3778)
   - [evidence] [\#4949](https://github.com/tendermint/tendermint/pull/4949) Migrate evidence reactor to Protobuf encoding (@marbar3778)
   - [mempool] [\#4940](https://github.com/tendermint/tendermint/pull/4940) Migrate mempool from to Protobuf encoding (@marbar3778)
-  - [mempool] [\#5321](https://github.com/tendermint/tendermint/pull/5321) Batch transactions when broadcasting them to peers (@melekes) 
+  - [mempool] [\#5321](https://github.com/tendermint/tendermint/pull/5321) Batch transactions when broadcasting them to peers (@melekes)
      - `MaxBatchBytes` new config setting defines the max size of one batch.
   - [p2p/pex] [\#4973](https://github.com/tendermint/tendermint/pull/4973) Migrate `p2p/pex` reactor to Protobuf encoding (@marbar3778)
   - [statesync] [\#4943](https://github.com/tendermint/tendermint/pull/4943) Migrate state sync reactor to Protobuf encoding (@marbar3778)
 
 - Blockchain Protocol
 
-  - [evidence] [\#4725](https://github.com/tendermint/tendermint/pull/4725) Remove `Pubkey` from `DuplicateVoteEvidence` (@marbar3778) 
+  - [evidence] [\#4725](https://github.com/tendermint/tendermint/pull/4725) Remove `Pubkey` from `DuplicateVoteEvidence` (@marbar3778)
   - [evidence] [\#5499](https://github.com/tendermint/tendermint/pull/5449) Cap evidence to a maximum number of bytes (supercedes [\#4780](https://github.com/tendermint/tendermint/pull/4780)) (@cmwaters)
   - [merkle] [\#5193](https://github.com/tendermint/tendermint/pull/5193) Header hashes are no longer empty for empty inputs, notably `DataHash`, `EvidenceHash`, and `LastResultsHash` (@erikgrinaker)
   - [state] [\#4845](https://github.com/tendermint/tendermint/pull/4845) Include `GasWanted` and `GasUsed` into `LastResultsHash` (@melekes)
@@ -300,7 +321,7 @@ Special thanks to external contributors on this release: @james-ray, @fedekunze,
   - [types] [\#4852](https://github.com/tendermint/tendermint/pull/4852) Vote & Proposal `SignBytes` is now func `VoteSignBytes` & `ProposalSignBytes` (@marbar3778)
   - [types] [\#4798](https://github.com/tendermint/tendermint/pull/4798) Simplify `VerifyCommitTrusting` func + remove extra validation (@melekes)
   - [types] [\#4845](https://github.com/tendermint/tendermint/pull/4845) Remove `ABCIResult` (@melekes)
-  - [types] [\#5029](https://github.com/tendermint/tendermint/pull/5029) Rename all values from `PartsHeader` to `PartSetHeader` to have consistency (@marbar3778) 
+  - [types] [\#5029](https://github.com/tendermint/tendermint/pull/5029) Rename all values from `PartsHeader` to `PartSetHeader` to have consistency (@marbar3778)
   - [types] [\#4939](https://github.com/tendermint/tendermint/pull/4939) `Total` in `Parts` & `PartSetHeader` has been changed from a `int` to a `uint32` (@marbar3778)
   - [types] [\#4939](https://github.com/tendermint/tendermint/pull/4939) Vote: `ValidatorIndex` & `Round` are now `int32` (@marbar3778)
   - [types] [\#4939](https://github.com/tendermint/tendermint/pull/4939) Proposal: `POLRound` & `Round` are now `int32` (@marbar3778)
@@ -338,7 +359,7 @@ Special thanks to external contributors on this release: @james-ray, @fedekunze,
 - [evidence] [\#4722](https://github.com/tendermint/tendermint/pull/4722) Consolidate evidence store and pool types to improve evidence DB (@cmwaters)
 - [evidence] [\#4839](https://github.com/tendermint/tendermint/pull/4839) Reject duplicate evidence from being proposed (@cmwaters)
 - [evidence] [\#5219](https://github.com/tendermint/tendermint/pull/5219) Change the source of evidence time to block time (@cmwaters)
-- [libs] [\#5126](https://github.com/tendermint/tendermint/pull/5126) Add a sync package which wraps sync.(RW)Mutex & deadlock.(RW)Mutex and use a build flag (deadlock) in order to enable deadlock checking (@marbar3778) 
+- [libs] [\#5126](https://github.com/tendermint/tendermint/pull/5126) Add a sync package which wraps sync.(RW)Mutex & deadlock.(RW)Mutex and use a build flag (deadlock) in order to enable deadlock checking (@marbar3778)
 - [light] [\#4935](https://github.com/tendermint/tendermint/pull/4935) Fetch and compare a new header with witnesses in parallel (@melekes)
 - [light] [\#4929](https://github.com/tendermint/tendermint/pull/4929) Compare header with witnesses only when doing bisection (@melekes)
 - [light] [\#4916](https://github.com/tendermint/tendermint/pull/4916) Validate basic for inbound validator sets and headers before further processing them (@cmwaters)

CHANGELOG_PENDING.md

@@ -24,14 +24,18 @@ Friendly reminder: We have a [bug bounty program](https://hackerone.com/tendermi
   - [fastsync/rpc] \#6620 Add TotalSyncedTime & RemainingTime to SyncInfo in /status RPC  (@JayT106)
   - [rpc/grpc] \#6725 Mark gRPC in the RPC layer as deprecated.
   - [blockchain/v2] \#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 `Listen` function updated to take an `int` argument, `maxOpenConnections`, instead of an entire config object. (@williambanfield)
+  - [rpc] \#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 Remove deprecated snake case commands. (@tychoish)
 - Apps
   - [ABCI] \#6408 Change the `key` and `value` fields from `[]byte` to `string` in the `EventAttribute` type. (@alexanderbez)
   - [ABCI] \#5447 Remove `SetOption` method from `ABCI.Client` interface
   - [ABCI] \#5447 Reset `Oneof` indexes for  `Request` and `Response`.
   - [ABCI] \#5818 Use protoio for msg length delimitation. Migrates from int64 to uint64 length delimiters.
+  - [ABCI] \#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 `TMCoreSemVer` has been renamed to `TMVersion`.
-    - It is not required any longer to set ldflags to set version strings
+	- It is not required any longer to set ldflags to set version strings
   - [abci/counter] \#6684 Delete counter example app
 
 - P2P Protocol
@@ -54,23 +58,25 @@ Friendly reminder: We have a [bug bounty program](https://hackerone.com/tendermi
   - [store] \#5848 Remove block store state in favor of using the db iterators directly (@cmwaters)
   - [state] \#5864 Use an iterator when pruning state (@cmwaters)
   - [types] \#6023 Remove `tm2pb.Header`, `tm2pb.BlockID`, `tm2pb.PartSetHeader` and `tm2pb.NewValidatorUpdate`.
-    - Each of the above types has a `ToProto` and `FromProto` method or function which replaced this logic.
+	- Each of the above types has a `ToProto` and `FromProto` method or function which replaced this logic.
   - [light] \#6054 Move `MaxRetryAttempt` option from client to provider.
-    - `NewWithOptions` now sets the max retry attempts and timeouts (@cmwaters)
+	- `NewWithOptions` now sets the max retry attempts and timeouts (@cmwaters)
   - [all] \#6077 Change spelling from British English to American (@cmwaters)
-    - Rename "Subscription.Cancelled()" to "Subscription.Canceled()" in libs/pubsub
-    - Rename "behaviour" pkg to "behavior" and internalized it in blockchain v2
+	- Rename "Subscription.Cancelled()" to "Subscription.Canceled()" in libs/pubsub
+	- Rename "behaviour" pkg to "behavior" and internalized it in blockchain v2
   - [rpc/client/http] \#6176 Remove `endpoint` arg from `New`, `NewWithTimeout` and `NewWithClient` (@melekes)
   - [rpc/client/http] \#6176 Unexpose `WSEvents` (@melekes)
   - [rpc/jsonrpc/client/ws_client] \#6176 `NewWS` no longer accepts options (use `NewWSWithOptions` and `OnReconnect` funcs to configure the client) (@melekes)
   - [internal/libs] \#6366 Move `autofile`, `clist`,`fail`,`flowrate`, `protoio`, `sync`, `tempfile`, `test` and `timer` lib packages to an internal folder
   - [libs/rand] \#6364 Remove most of libs/rand in favour of standard lib's `math/rand` (@liamsi)
   - [mempool] \#6466 The original mempool reactor has been versioned as `v0` and moved to a sub-package under the root `mempool` package.
-    Some core types have been kept in the `mempool` package such as `TxCache` and it's implementations, the `Mempool` interface itself
-    and `TxInfo`. (@alexanderbez)
+	Some core types have been kept in the `mempool` package such as `TxCache` and it's implementations, the `Mempool` interface itself
+	and `TxInfo`. (@alexanderbez)
   - [crypto/sr25519] \#6526 Do not re-execute the Ed25519-style key derivation step when doing signing and verification.  The derivation is now done once and only once.  This breaks `sr25519.GenPrivKeyFromSecret` output compatibility. (@Yawning)
-  - [types] \#6627 Move `NodeKey` to types to make the type public. 
+  - [types] \#6627 Move `NodeKey` to types to make the type public.
   - [config] \#6627 Extend `config` to contain methods `LoadNodeKeyID` and `LoadorGenNodeKeyID`
+  - [blocksync] \#6755 Rename `FastSync` and `Blockchain` package to `BlockSync`
+	(@cmwaters)
 
 - Blockchain Protocol
 
@@ -81,6 +87,7 @@ Friendly reminder: We have a [bug bounty program](https://hackerone.com/tendermi
 
 - Tooling
   - [tools] \#6498 Set OS home dir to instead of the hardcoded PATH. (@JayT106)
+  - [cli/indexer] \#6676 Reindex events command line tooling. (@JayT106)
 
 ### FEATURES
 
@@ -100,8 +107,10 @@ Friendly reminder: We have a [bug bounty program](https://hackerone.com/tendermi
 - [config/indexer] \#6411 Introduce support for custom event indexing data sources, specifically PostgreSQL. (@JayT106)
 - [fastsync/event] \#6619 Emit fastsync status event when switching consensus/fastsync (@JayT106)
 - [statesync/event] \#6700 Emit statesync status start/end event (@JayT106)
+- [inspect] \#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 and \#6589. (@tychoish)
 - [statesync] \#6566 Allow state sync fetchers and request timeout to be configurable. (@alexanderbez)
 - [types] \#6478 Add `block_id` to `newblock` event (@jeebster)
@@ -149,8 +158,7 @@ Friendly reminder: We have a [bug bounty program](https://hackerone.com/tendermi
 - [blockchain/v1] [\#5701](https://github.com/tendermint/tendermint/pull/5701) Handle peers without blocks (@melekes)
 - [blockchain/v1] \#5711 Fix deadlock (@melekes)
 - [evidence] \#6375 Fix bug with inconsistent LightClientAttackEvidence hashing (cmwaters)
-- [rpc] \#6507 fix RPC client doesn't handle url's without ports (@JayT106)
+- [rpc] \#6507 Ensure RPC client can handle URLs without ports (@JayT106)
 - [statesync] \#6463 Adds Reverse Sync feature to fetch historical light blocks after state sync in order to verify any evidence (@cmwaters)
 - [fastsync] \#6590 Update the metrics during fast-sync (@JayT106)
 - [gitignore] \#6668 Fix gitignore of abci-cli (@tanyabouman)
-- [light] \#6687 Fix bug with incorrecly handled contexts in the light client (@cmwaters)

CONTRIBUTING.md

@@ -227,16 +227,96 @@ Fixes #nnnn
 
 Each PR should have one commit once it lands on `master`; this can be accomplished by using the "squash and merge" button on Github. Be sure to edit your commit message, though!
 
-### Release Procedure
+### Release procedure
 
-#### Major Release
+#### A note about backport branches
+Tendermint's `master` branch is under active development.
+Releases are specified using tags and are built from long-lived "backport" branches.
+Each release "line" (e.g. 0.34 or 0.33) has its own long-lived backport branch,
+and the backport branches have names like `v0.34.x` or `v0.33.x`
+(literally, `x`; it is not a placeholder in this case).
+
+As non-breaking changes land on `master`, they should also be backported (cherry-picked)
+to these backport branches.
+
+We use Mergify's [backport feature](https://mergify.io/features/backports) to automatically backport
+to the needed branch. There should be a label for any backport branch that you'll be targeting.
+To notify the bot to backport a pull request, mark the pull request with
+the label `S:backport-to-<backport_branch>`.
+Once the original pull request is merged, the bot will try to cherry-pick the pull request
+to the backport branch. If the bot fails to backport, it will open a pull request.
+The author of the original pull request is responsible for solving the conflicts and
+merging the pull request.
+
+#### Creating a backport branch
+If this is the first release candidate for a major release, you get to have the honor of creating
+the backport branch!
+
+Note that, after creating the backport branch, you'll also need to update the tags on `master`
+so that `go mod` is able to order the branches correctly. You should tag `master` with a "dev" tag
+that is "greater than" the backport branches tags. See #6072 for more context.
+
+In the following example, we'll assume that we're making a backport branch for
+the 0.35.x line.
+
+1. Start on `master`
+2. Create the backport branch:
+   `git checkout -b v0.35.x`
+3. Go back to master and tag it as the dev branch for the _next_ major release and push it back up:
+   `git tag -a v0.36.0-dev; git push v0.36.0-dev`
+4. Create a new workflow to run the e2e nightlies for this backport branch.
+   (See https://github.com/tendermint/tendermint/blob/master/.github/workflows/e2e-nightly-34x.yml
+   for an example.)
+
+#### Release candidates
+
+Before creating an official release, especially a major release, we may want to create a
+release candidate (RC) for our friends and partners to test out. We use git tags to
+create RCs, and we build them off of backport branches.
+
+Tags for RCs should follow the "standard" release naming conventions, with `-rcX` at the end
+(for example, `v0.35.0-rc0`).
+
+(Note that branches and tags _cannot_ have the same names, so it's important that these branches
+have distinct names from the tags/release names.)
+
+If this is the first RC for a major release, you'll have to make a new backport branch (see above).
+Otherwise:
+
+1. Start from the backport branch (e.g. `v0.35.x`).
+1. Run the integration tests and the e2e nightlies
+   (which can be triggered from the Github UI;
+   e.g., https://github.com/tendermint/tendermint/actions/workflows/e2e-nightly-34x.yml).
+1. Prepare the changelog:
+   - Move the changes included in `CHANGELOG_PENDING.md` into `CHANGELOG.md`.
+   - Run `python ./scripts/linkify_changelog.py CHANGELOG.md` to add links for
+     all PRs
+   - Ensure that UPGRADING.md is up-to-date and includes notes on any breaking changes
+      or other upgrading flows.
+   - Bump TMVersionDefault version in  `version.go`
+   - Bump P2P and block protocol versions in  `version.go`, if necessary
+   - Bump ABCI protocol version in `version.go`, if necessary
+1. Open a PR with these changes against the backport branch.
+1. Once these changes have landed on the backport branch, be sure to pull them back down locally.
+2. Once you have the changes locally, create the new tag, specifying a name and a tag "message":
+   `git tag -a v0.35.0-rc0 -m "Release Candidate v0.35.0-rc0`
+3. Push the tag back up to origin:
+   `git push origin v0.35.0-rc0`
+   Now the tag should be available on the repo's releases page.
+4. Future RCs will continue to be built off of this branch.
+
+Note that this process should only be used for "true" RCs--
+release candidates that, if successful, will be the next release.
+For more experimental "RCs," create a new, short-lived branch and tag that instead.
+
+#### Major release
 
 This major release process assumes that this release was preceded by release candidates.
-If there were no release candidates, and you'd like to cut a major release directly from master, see below.
+If there were no release candidates, begin by creating a backport branch, as described above.
 
-1. Start on the latest RC branch (`RCx/vX.X.0`).
-2. Run integration tests.
-3. Branch off of the RC branch (`git checkout -b release-prep`) and prepare the release:
+1. Start on the backport branch (e.g. `v0.35.x`)
+2. Run integration tests and the e2e nightlies.
+3. Prepare the release:
    - "Squash" changes from the changelog entries for the RCs into a single entry,
       and add all changes included in `CHANGELOG_PENDING.md`.
       (Squashing includes both combining all entries, as well as removing or simplifying
@@ -248,58 +328,24 @@ If there were no release candidates, and you'd like to cut a major release direc
    - Bump TMVersionDefault version in  `version.go`
    - Bump P2P and block protocol versions in  `version.go`, if necessary
    - Bump ABCI protocol version in `version.go`, if necessary
-   - Add any release notes you would like to be added to the body of the release to `release_notes.md`.
-4. Open a PR with these changes against the RC branch (`RCx/vX.X.0`).
-5. Once these changes are on the RC branch, branch off of the RC branch again to create a release branch:
-   - `git checkout RCx/vX.X.0`
-   - `git checkout -b release/vX.X.0`
-6. Push a tag with prepared release details. This will trigger the actual release `vX.X.0`.
-   - `git tag -a vX.X.0 -m 'Release vX.X.0'`
-   - `git push origin vX.X.0`
+4. Open a PR with these changes against the backport branch.
+5. Once these changes are on the backport branch, push a tag with prepared release details.
+   This will trigger the actual release `v0.35.0`.
+   - `git tag -a v0.35.0 -m 'Release v0.35.0'`
+   - `git push origin v0.35.0`
 7. Make sure that `master` is updated with the latest `CHANGELOG.md`, `CHANGELOG_PENDING.md`, and `UPGRADING.md`.
-8. Create the long-lived minor release branch `RC0/vX.X.1` for the next point release on this
-   new major release series.
 
-##### Major Release (from `master`)
-
-1. Start on `master`
-2. Run integration tests (see `test_integrations` in Makefile)
-3. Prepare release in a pull request against `master` (to be squash merged):
-   - Copy `CHANGELOG_PENDING.md` to top of `CHANGELOG.md`; if this release
-      had release candidates, squash all the RC updates into one
-   - Run `python ./scripts/linkify_changelog.py CHANGELOG.md` to add links for
-     all issues
-   - Run `bash ./scripts/authors.sh` to get a list of authors since the latest
-     release, and add the github aliases of external contributors to the top of
-     the changelog. To lookup an alias from an email, try `bash ./scripts/authors.sh <email>`
-   - Reset the `CHANGELOG_PENDING.md`
-   - Bump TMVersionDefault version in  `version.go`
-   - Bump P2P and block protocol versions in  `version.go`, if necessary
-   - Bump ABCI protocol version in `version.go`, if necessary
-   - Make sure all significant breaking changes are covered in `UPGRADING.md`
-   - Add any release notes you would like to be added to the body of the release to `release_notes.md`.
-4. Push a tag with prepared release details (this will trigger the release `vX.X.0`)
-   - `git tag -a vX.X.x -m 'Release vX.X.x'`
-   - `git push origin vX.X.x`
-5. Update the `CHANGELOG.md` file on master with the releases changelog.
-6. Delete any RC branches and tags for this release (if applicable)
-
-#### Minor Release (Point Releases)
+#### Minor release (point releases)
 
 Minor releases are done differently from major releases: They are built off of long-lived backport branches, rather than from master.
-Each release "line" (e.g. 0.34 or 0.33) has its own long-lived backport branch, and
-the backport branches have names like `v0.34.x` or `v0.33.x` (literally, `x`; it is not a placeholder in this case).
-
 As non-breaking changes land on `master`, they should also be backported (cherry-picked) to these backport branches.
 
-We use Mergify's [backport feature](https://mergify.io/features/backports) to automatically backport to the needed branch. Depending on which backport branch you need to backport to there will be labels for them. To notify the bot to backport a pull request, mark the pull request with the label `backport-to-<backport_branch>`. Once the original pull request is merged, the bot will try to cherry-pick the pull request to the backport branch. If the bot fails to backport, it will open a pull request. The author of the original pull request is responsible for solving the conflicts and merging the pull request.
-
 Minor releases don't have release candidates by default, although any tricky changes may merit a release candidate.
 
 To create a minor release:
 
-1. Checkout the long-lived backport branch: `git checkout vX.X.x`
-2. Run integration tests: `make test_integrations`
+1. Checkout the long-lived backport branch: `git checkout v0.35.x`
+2. Run integration tests (`make test_integrations`) and the nightlies.
 3. Check out a new branch and prepare the release:
    - Copy `CHANGELOG_PENDING.md` to top of `CHANGELOG.md`
    - Run `python ./scripts/linkify_changelog.py CHANGELOG.md` to add links for all issues
@@ -308,35 +354,14 @@ To create a minor release:
    - Bump the ABCI version number, if necessary.
      (Note that ABCI follows semver, and that ABCI versions are the only versions
      which can change during minor releases, and only field additions are valid minor changes.)
-   - Add any release notes you would like to be added to the body of the release to `release_notes.md`.
-4. Open a PR with these changes that will land them back on `vX.X.x`
+4. Open a PR with these changes that will land them back on `v0.35.x`
 5. Once this change has landed on the backport branch, make sure to pull it locally, then push a tag.
-   - `git tag -a vX.X.x -m 'Release vX.X.x'`
-   - `git push origin vX.X.x`
+   - `git tag -a v0.35.1 -m 'Release v0.35.1'`
+   - `git push origin v0.35.1`
 6. Create a pull request back to master with the CHANGELOG & version changes from the latest release.
    - Remove all `R:minor` labels from the pull requests that were included in the release.
    - Do not merge the backport branch into master.
 
-#### Release Candidates
-
-Before creating an official release, especially a major release, we may want to create a
-release candidate (RC) for our friends and partners to test out. We use git tags to
-create RCs, and we build them off of RC branches. RC branches typically have names formatted
-like `RCX/vX.X.X` (or, concretely, `RC0/v0.34.0`), while the tags themselves follow
-the "standard" release naming conventions, with `-rcX` at the end (`vX.X.X-rcX`).
-
-(Note that branches and tags _cannot_ have the same names, so it's important that these branches
-have distinct names from the tags/release names.)
-
-1. Start from the RC branch (e.g. `RC0/v0.34.0`).
-2. Create the new tag, specifying a name and a tag "message":
-   `git tag -a v0.34.0-rc0 -m "Release Candidate v0.34.0-rc0`
-3. Push the tag back up to origin:
-   `git push origin v0.34.0-rc4`
-   Now the tag should be available on the repo's releases page.
-4. Create a new release candidate branch for any possible updates to the RC:
-   `git checkout -b RC1/v0.34.0; git push origin RC1/v0.34.0`
-
 ## Testing
 
 ### Unit tests

Makefile

@@ -237,7 +237,7 @@ build-docker: build-linux
 ###############################################################################
 
 mockery:
-	go generate -run="mockery" ./...
+	go generate -run="./scripts/mockery_generate.sh" ./...
 .PHONY: mockery
 
 ###############################################################################

UPGRADING.md

@@ -17,22 +17,44 @@ This guide provides instructions for upgrading to specific versions of Tendermin
 
 ### Config Changes
 
-* `fast_sync = "v1"` is no longer supported. Please use `v2` instead.
+* `fast_sync = "v1"` and `fast_sync = "v2"` are no longer supported. Please use `v0` instead.
 
 * All config parameters are now hyphen-case (also known as kebab-case) instead of snake_case. Before restarting the node make sure
   you have updated all the variables in your `config.toml` file.
 
 * Added `--mode` flag and `mode` config variable on `config.toml` for setting Mode of the Node: `full` | `validator` | `seed` (default: `full`)
   [ADR-52](https://github.com/tendermint/tendermint/blob/master/docs/architecture/adr-052-tendermint-mode.md)
-  
+
 * `BootstrapPeers` has been added as part of the new p2p stack. This will eventually replace
   `Seeds`. Bootstrap peers are connected with on startup if needed for peer discovery. Unlike
-  persistent peers, there's no gaurantee that the node will remain connected with these peers. 
+  persistent peers, there's no gaurantee that the node will remain connected with these peers.
 
-- configuration values starting with `priv-validator-` have moved to the new
+* configuration values starting with `priv-validator-` have moved to the new
   `priv-validator` section, without the `priv-validator-` prefix.
 
-* Fast Sync v2 has been deprecated, please use v0 to sync a node.
+* The fast sync process as well as the blockchain package and service has all
+  been renamed to block sync
+
+### Key Format Changes
+
+The format of all tendermint on-disk database keys changes in
+0.35. Upgrading nodes must either re-sync all data or run a migration
+script provided in this release. The script located in
+`github.com/tendermint/tendermint/scripts/keymigrate/migrate.go`
+provides the function `Migrate(context.Context, db.DB)` which you can
+operationalize as makes sense for your deployment.
+
+For ease of use the `tendermint` command includes a CLI version of the
+migration script, which you can invoke, as in:
+
+	tendermint key-migrate
+
+This reads the configuration file as normal and allows the
+`--db-backend` and `--db-dir` flags to change database operations as
+needed.
+
+The migration operation is idempotent and can be run more than once,
+if needed.
 
 ### CLI Changes
 
@@ -65,7 +87,7 @@ are:
 - `blockchain`
 - `evidence`
 
-Accordingly, the space `node` package was changed to reduce access to
+Accordingly, the `node` package was changed to reduce access to
 tendermint internals: applications that use tendermint as a library
 will need to change to accommodate these changes. Most notably:
 
@@ -78,8 +100,32 @@ will need to change to accommodate these changes. Most notably:
 
 ### RPC changes
 
+#### gRPC Support
+
 Mark gRPC in the RPC layer as deprecated and to be removed in 0.36.
 
+#### Peer Management Interface
+
+When running with the new P2P Layer, the methods `UnsafeDialSeeds` and
+`UnsafeDialPeers` RPC methods will always return an error. They are
+deprecated and will be removed in 0.36 when the legacy peer stack is
+removed.
+
+Additionally the format of the Peer list returned in the `NetInfo`
+method changes in this release to accommodate the different way that
+the new stack tracks data about peers. This change affects users of
+both stacks.
+
+### Support for Custom Reactor and Mempool Implementations
+
+The changes to p2p layer removed existing support for custom
+reactors. Based on our understanding of how this functionality was
+used, the introduction of the prioritized mempool covers nearly all of
+the use cases for custom reactors. If you are currently running custom
+reactors and mempools and are having trouble seeing the migration path
+for your project please feel free to reach out to the Tendermint Core
+development team directly.
+
 ## v0.34.0
 
 **Upgrading to Tendermint 0.34 requires a blockchain restart.**
@@ -233,8 +279,8 @@ Other user-relevant changes include:
 
 * The old `lite` package was removed; the new light client uses the `light` package.
 * The `Verifier` was broken up into two pieces:
-    * Core verification logic (pure `VerifyX` functions)
-    * `Client` object, which represents the complete light client
+	* Core verification logic (pure `VerifyX` functions)
+	* `Client` object, which represents the complete light client
 * The new light clients stores headers & validator sets as `LightBlock`s
 * The RPC client can be found in the `/rpc` directory.
 * The HTTP(S) proxy is located in the `/proxy` directory.
@@ -366,12 +412,12 @@ Evidence Params has been changed to include duration.
 ### Go API
 
 * `libs/common` has been removed in favor of specific pkgs.
-    * `async`
-    * `service`
-    * `rand`
-    * `net`
-    * `strings`
-    * `cmap`
+	* `async`
+	* `service`
+	* `rand`
+	* `net`
+	* `strings`
+	* `cmap`
 * removal of `errors` pkg
 
 ### RPC Changes
@@ -440,9 +486,9 @@ Prior to the update, suppose your `ResponseDeliverTx` look like:
 ```go
 abci.ResponseDeliverTx{
   Tags: []kv.Pair{
-    {Key: []byte("sender"), Value: []byte("foo")},
-    {Key: []byte("recipient"), Value: []byte("bar")},
-    {Key: []byte("amount"), Value: []byte("35")},
+	{Key: []byte("sender"), Value: []byte("foo")},
+	{Key: []byte("recipient"), Value: []byte("bar")},
+	{Key: []byte("amount"), Value: []byte("35")},
   }
 }
 ```
@@ -461,14 +507,14 @@ the following `Events`:
 ```go
 abci.ResponseDeliverTx{
   Events: []abci.Event{
-    {
-      Type: "transfer",
-      Attributes: kv.Pairs{
-        {Key: []byte("sender"), Value: []byte("foo")},
-        {Key: []byte("recipient"), Value: []byte("bar")},
-        {Key: []byte("amount"), Value: []byte("35")},
-      },
-    }
+	{
+	  Type: "transfer",
+	  Attributes: kv.Pairs{
+		{Key: []byte("sender"), Value: []byte("foo")},
+		{Key: []byte("recipient"), Value: []byte("bar")},
+		{Key: []byte("amount"), Value: []byte("35")},
+	  },
+	}
 }
 ```
 
@@ -516,9 +562,9 @@ In this case, the WS client will receive an error with description:
   "jsonrpc": "2.0",
   "id": "{ID}#event",
   "error": {
-    "code": -32000,
-    "msg": "Server error",
-    "data": "subscription was canceled (reason: client is not pulling messages fast enough)" // or "subscription was canceled (reason: Tendermint exited)"
+	"code": -32000,
+	"msg": "Server error",
+	"data": "subscription was canceled (reason: client is not pulling messages fast enough)" // or "subscription was canceled (reason: Tendermint exited)"
   }
 }
 
@@ -724,9 +770,9 @@ just the `Data` field set:
 
 ```go
 []ProofOp{
-    ProofOp{
-        Data: <proof bytes>,
-    }
+	ProofOp{
+		Data: <proof bytes>,
+	}
 }
 ```
 

abci/client/client.go

@@ -15,7 +15,7 @@ const (
 	echoRetryIntervalSeconds = 1
 )
 
-//go:generate mockery --case underscore --name Client
+//go:generate ../../scripts/mockery_generate.sh Client
 
 // Client defines an interface for an ABCI client.
 //
@@ -46,6 +46,9 @@ type Client interface {
 	OfferSnapshotAsync(context.Context, types.RequestOfferSnapshot) (*ReqRes, error)
 	LoadSnapshotChunkAsync(context.Context, types.RequestLoadSnapshotChunk) (*ReqRes, error)
 	ApplySnapshotChunkAsync(context.Context, types.RequestApplySnapshotChunk) (*ReqRes, error)
+	ExtendVoteAsync(context.Context, types.RequestExtendVote) (*ReqRes, error)
+	VerifyVoteExtensionAsync(context.Context, types.RequestVerifyVoteExtension) (*ReqRes, error)
+	PrepareProposalAsync(context.Context, types.RequestPrepareProposal) (*ReqRes, error)
 
 	// Synchronous requests
 	FlushSync(context.Context) error
@@ -62,6 +65,9 @@ type Client interface {
 	OfferSnapshotSync(context.Context, types.RequestOfferSnapshot) (*types.ResponseOfferSnapshot, error)
 	LoadSnapshotChunkSync(context.Context, types.RequestLoadSnapshotChunk) (*types.ResponseLoadSnapshotChunk, error)
 	ApplySnapshotChunkSync(context.Context, types.RequestApplySnapshotChunk) (*types.ResponseApplySnapshotChunk, error)
+	ExtendVoteSync(context.Context, types.RequestExtendVote) (*types.ResponseExtendVote, error)
+	VerifyVoteExtensionSync(context.Context, types.RequestVerifyVoteExtension) (*types.ResponseVerifyVoteExtension, error)
+	PrepareProposalSync(context.Context, types.RequestPrepareProposal) (*types.ResponsePrepareProposal, error)
 }
 
 //----------------------------------------

abci/client/grpc_client.go

@@ -314,6 +314,66 @@ func (cli *grpcClient) ApplySnapshotChunkAsync(
 	)
 }
 
+// NOTE: call is synchronous, use ctx to break early if needed
+func (cli *grpcClient) ExtendVoteAsync(
+	ctx context.Context,
+	params types.RequestExtendVote,
+) (*ReqRes, error) {
+	req := types.ToRequestExtendVote(params)
+	res, err := cli.client.ExtendVote(ctx, req.GetExtendVote(), grpc.WaitForReady(true))
+	if err != nil {
+		return nil, err
+	}
+	return cli.finishAsyncCall(
+		ctx,
+		req,
+		&types.Response{Value: &types.Response_ExtendVote{ExtendVote: res}},
+	)
+}
+
+// NOTE: call is synchronous, use ctx to break early if needed
+func (cli *grpcClient) VerifyVoteExtensionAsync(
+	ctx context.Context,
+	params types.RequestVerifyVoteExtension,
+) (*ReqRes, error) {
+	req := types.ToRequestVerifyVoteExtension(params)
+	res, err := cli.client.VerifyVoteExtension(ctx, req.GetVerifyVoteExtension(), grpc.WaitForReady(true))
+	if err != nil {
+		return nil, err
+	}
+	return cli.finishAsyncCall(
+		ctx,
+		req,
+		&types.Response{
+			Value: &types.Response_VerifyVoteExtension{
+				VerifyVoteExtension: res,
+			},
+		},
+	)
+}
+
+func (cli *grpcClient) PrepareProposalAsync(
+	ctx context.Context,
+	params types.RequestPrepareProposal,
+) (*ReqRes, error) {
+
+	req := types.ToRequestPrepareProposal(params)
+	res, err := cli.client.PrepareProposal(ctx, req.GetPrepareProposal(), grpc.WaitForReady(true))
+	if err != nil {
+		return nil, err
+	}
+
+	return cli.finishAsyncCall(
+		ctx,
+		req,
+		&types.Response{
+			Value: &types.Response_PrepareProposal{
+				PrepareProposal: res,
+			},
+		},
+	)
+}
+
 // finishAsyncCall creates a ReqRes for an async call, and immediately populates it
 // with the response. We don't complete it until it's been ordered via the channel.
 func (cli *grpcClient) finishAsyncCall(ctx context.Context, req *types.Request, res *types.Response) (*ReqRes, error) {
@@ -504,3 +564,37 @@ func (cli *grpcClient) ApplySnapshotChunkSync(
 	}
 	return cli.finishSyncCall(reqres).GetApplySnapshotChunk(), cli.Error()
 }
+
+func (cli *grpcClient) ExtendVoteSync(
+	ctx context.Context,
+	params types.RequestExtendVote) (*types.ResponseExtendVote, error) {
+
+	reqres, err := cli.ExtendVoteAsync(ctx, params)
+	if err != nil {
+		return nil, err
+	}
+	return cli.finishSyncCall(reqres).GetExtendVote(), cli.Error()
+}
+
+func (cli *grpcClient) VerifyVoteExtensionSync(
+	ctx context.Context,
+	params types.RequestVerifyVoteExtension) (*types.ResponseVerifyVoteExtension, error) {
+
+	reqres, err := cli.VerifyVoteExtensionAsync(ctx, params)
+	if err != nil {
+		return nil, err
+	}
+	return cli.finishSyncCall(reqres).GetVerifyVoteExtension(), cli.Error()
+}
+
+func (cli *grpcClient) PrepareProposalSync(
+	ctx context.Context,
+	params types.RequestPrepareProposal,
+) (*types.ResponsePrepareProposal, error) {
+
+	reqres, err := cli.PrepareProposalAsync(ctx, params)
+	if err != nil {
+		return nil, err
+	}
+	return cli.finishSyncCall(reqres).GetPrepareProposal(), cli.Error()
+}

abci/client/local_client.go

@@ -204,6 +204,48 @@ func (app *localClient) ApplySnapshotChunkAsync(
 	), nil
 }
 
+func (app *localClient) ExtendVoteAsync(
+	ctx context.Context,
+	req types.RequestExtendVote,
+) (*ReqRes, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.ExtendVote(req)
+	return app.callback(
+		types.ToRequestExtendVote(req),
+		types.ToResponseExtendVote(res),
+	), nil
+}
+
+func (app *localClient) VerifyVoteExtensionAsync(
+	ctx context.Context,
+	req types.RequestVerifyVoteExtension,
+) (*ReqRes, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.VerifyVoteExtension(req)
+	return app.callback(
+		types.ToRequestVerifyVoteExtension(req),
+		types.ToResponseVerifyVoteExtension(res),
+	), nil
+}
+
+func (app *localClient) PrepareProposalAsync(
+	ctx context.Context,
+	req types.RequestPrepareProposal,
+) (*ReqRes, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.PrepareProposal(req)
+	return app.callback(
+		types.ToRequestPrepareProposal(req),
+		types.ToResponsePrepareProposal(res),
+	), nil
+}
+
 //-------------------------------------------------------
 
 func (app *localClient) FlushSync(ctx context.Context) error {
@@ -346,6 +388,39 @@ func (app *localClient) ApplySnapshotChunkSync(
 	return &res, nil
 }
 
+func (app *localClient) ExtendVoteSync(
+	ctx context.Context,
+	req types.RequestExtendVote) (*types.ResponseExtendVote, error) {
+
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.ExtendVote(req)
+	return &res, nil
+}
+
+func (app *localClient) VerifyVoteExtensionSync(
+	ctx context.Context,
+	req types.RequestVerifyVoteExtension) (*types.ResponseVerifyVoteExtension, error) {
+
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.VerifyVoteExtension(req)
+	return &res, nil
+}
+
+func (app *localClient) PrepareProposalSync(
+	ctx context.Context,
+	req types.RequestPrepareProposal,
+) (*types.ResponsePrepareProposal, error) {
+	app.mtx.Lock()
+	defer app.mtx.Unlock()
+
+	res := app.Application.PrepareProposal(req)
+	return &res, nil
+}
+
 //-------------------------------------------------------
 
 func (app *localClient) callback(req *types.Request, res *types.Response) *ReqRes {

abci/client/mocks/client.go

@@ -1,4 +1,4 @@
-// Code generated by mockery v0.0.0-dev. DO NOT EDIT.
+// Code generated by mockery. DO NOT EDIT.
 
 package mocks
 
@@ -355,6 +355,52 @@ func (_m *Client) Error() error {
 	return r0
 }
 
+// ExtendVoteAsync provides a mock function with given fields: _a0, _a1
+func (_m *Client) ExtendVoteAsync(_a0 context.Context, _a1 types.RequestExtendVote) (*abcicli.ReqRes, error) {
+	ret := _m.Called(_a0, _a1)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(context.Context, types.RequestExtendVote) *abcicli.ReqRes); ok {
+		r0 = rf(_a0, _a1)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, types.RequestExtendVote) error); ok {
+		r1 = rf(_a0, _a1)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// ExtendVoteSync provides a mock function with given fields: _a0, _a1
+func (_m *Client) ExtendVoteSync(_a0 context.Context, _a1 types.RequestExtendVote) (*types.ResponseExtendVote, error) {
+	ret := _m.Called(_a0, _a1)
+
+	var r0 *types.ResponseExtendVote
+	if rf, ok := ret.Get(0).(func(context.Context, types.RequestExtendVote) *types.ResponseExtendVote); ok {
+		r0 = rf(_a0, _a1)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseExtendVote)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, types.RequestExtendVote) error); ok {
+		r1 = rf(_a0, _a1)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // FlushAsync provides a mock function with given fields: _a0
 func (_m *Client) FlushAsync(_a0 context.Context) (*abcicli.ReqRes, error) {
 	ret := _m.Called(_a0)
@@ -669,6 +715,52 @@ func (_m *Client) OnStop() {
 	_m.Called()
 }
 
+// PrepareProposalAsync provides a mock function with given fields: _a0, _a1
+func (_m *Client) PrepareProposalAsync(_a0 context.Context, _a1 types.RequestPrepareProposal) (*abcicli.ReqRes, error) {
+	ret := _m.Called(_a0, _a1)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(context.Context, types.RequestPrepareProposal) *abcicli.ReqRes); ok {
+		r0 = rf(_a0, _a1)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, types.RequestPrepareProposal) error); ok {
+		r1 = rf(_a0, _a1)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// PrepareProposalSync provides a mock function with given fields: _a0, _a1
+func (_m *Client) PrepareProposalSync(_a0 context.Context, _a1 types.RequestPrepareProposal) (*types.ResponsePrepareProposal, error) {
+	ret := _m.Called(_a0, _a1)
+
+	var r0 *types.ResponsePrepareProposal
+	if rf, ok := ret.Get(0).(func(context.Context, types.RequestPrepareProposal) *types.ResponsePrepareProposal); ok {
+		r0 = rf(_a0, _a1)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponsePrepareProposal)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, types.RequestPrepareProposal) error); ok {
+		r1 = rf(_a0, _a1)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // QueryAsync provides a mock function with given fields: _a0, _a1
 func (_m *Client) QueryAsync(_a0 context.Context, _a1 types.RequestQuery) (*abcicli.ReqRes, error) {
 	ret := _m.Called(_a0, _a1)
@@ -797,6 +889,52 @@ func (_m *Client) String() string {
 	return r0
 }
 
+// VerifyVoteExtensionAsync provides a mock function with given fields: _a0, _a1
+func (_m *Client) VerifyVoteExtensionAsync(_a0 context.Context, _a1 types.RequestVerifyVoteExtension) (*abcicli.ReqRes, error) {
+	ret := _m.Called(_a0, _a1)
+
+	var r0 *abcicli.ReqRes
+	if rf, ok := ret.Get(0).(func(context.Context, types.RequestVerifyVoteExtension) *abcicli.ReqRes); ok {
+		r0 = rf(_a0, _a1)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*abcicli.ReqRes)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, types.RequestVerifyVoteExtension) error); ok {
+		r1 = rf(_a0, _a1)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// VerifyVoteExtensionSync provides a mock function with given fields: _a0, _a1
+func (_m *Client) VerifyVoteExtensionSync(_a0 context.Context, _a1 types.RequestVerifyVoteExtension) (*types.ResponseVerifyVoteExtension, error) {
+	ret := _m.Called(_a0, _a1)
+
+	var r0 *types.ResponseVerifyVoteExtension
+	if rf, ok := ret.Get(0).(func(context.Context, types.RequestVerifyVoteExtension) *types.ResponseVerifyVoteExtension); ok {
+		r0 = rf(_a0, _a1)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.ResponseVerifyVoteExtension)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, types.RequestVerifyVoteExtension) error); ok {
+		r1 = rf(_a0, _a1)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // Wait provides a mock function with given fields:
 func (_m *Client) Wait() {
 	_m.Called()

abci/client/socket_client.go

@@ -295,6 +295,27 @@ func (cli *socketClient) ApplySnapshotChunkAsync(
 	return cli.queueRequestAsync(ctx, types.ToRequestApplySnapshotChunk(req))
 }
 
+func (cli *socketClient) ExtendVoteAsync(
+	ctx context.Context,
+	req types.RequestExtendVote,
+) (*ReqRes, error) {
+	return cli.queueRequestAsync(ctx, types.ToRequestExtendVote(req))
+}
+
+func (cli *socketClient) VerifyVoteExtensionAsync(
+	ctx context.Context,
+	req types.RequestVerifyVoteExtension,
+) (*ReqRes, error) {
+	return cli.queueRequestAsync(ctx, types.ToRequestVerifyVoteExtension(req))
+}
+
+func (cli *socketClient) PrepareProposalAsync(
+	ctx context.Context,
+	req types.RequestPrepareProposal,
+) (*ReqRes, error) {
+	return cli.queueRequestAsync(ctx, types.ToRequestPrepareProposal(req))
+}
+
 //----------------------------------------
 
 func (cli *socketClient) FlushSync(ctx context.Context) error {
@@ -465,6 +486,40 @@ func (cli *socketClient) ApplySnapshotChunkSync(
 	return reqres.Response.GetApplySnapshotChunk(), nil
 }
 
+func (cli *socketClient) ExtendVoteSync(
+	ctx context.Context,
+	req types.RequestExtendVote) (*types.ResponseExtendVote, error) {
+
+	reqres, err := cli.queueRequestAndFlushSync(ctx, types.ToRequestExtendVote(req))
+	if err != nil {
+		return nil, err
+	}
+	return reqres.Response.GetExtendVote(), nil
+}
+
+func (cli *socketClient) VerifyVoteExtensionSync(
+	ctx context.Context,
+	req types.RequestVerifyVoteExtension) (*types.ResponseVerifyVoteExtension, error) {
+
+	reqres, err := cli.queueRequestAndFlushSync(ctx, types.ToRequestVerifyVoteExtension(req))
+	if err != nil {
+		return nil, err
+	}
+	return reqres.Response.GetVerifyVoteExtension(), nil
+}
+
+func (cli *socketClient) PrepareProposalSync(
+	ctx context.Context,
+	req types.RequestPrepareProposal,
+) (*types.ResponsePrepareProposal, error) {
+
+	reqres, err := cli.queueRequestAndFlushSync(ctx, types.ToRequestPrepareProposal(req))
+	if err != nil {
+		return nil, err
+	}
+	return reqres.Response.GetPrepareProposal(), nil
+}
+
 //----------------------------------------
 
 // queueRequest enqueues req onto the queue. If the queue is full, it ether
@@ -591,6 +646,12 @@ func resMatchesReq(req *types.Request, res *types.Response) (ok bool) {
 		_, ok = res.Value.(*types.Response_ListSnapshots)
 	case *types.Request_OfferSnapshot:
 		_, ok = res.Value.(*types.Response_OfferSnapshot)
+	case *types.Request_ExtendVote:
+		_, ok = res.Value.(*types.Response_ExtendVote)
+	case *types.Request_VerifyVoteExtension:
+		_, ok = res.Value.(*types.Response_VerifyVoteExtension)
+	case *types.Request_PrepareProposal:
+		_, ok = res.Value.(*types.Response_PrepareProposal)
 	}
 	return ok
 }

abci/example/kvstore/README.md

@@ -4,7 +4,7 @@ There are two app's here: the KVStoreApplication and the PersistentKVStoreApplic
 
 ## KVStoreApplication
 
-The KVStoreApplication is a simple merkle key-value store. 
+The KVStoreApplication is a simple merkle key-value store.
 Transactions of the form `key=value` are stored as key-value pairs in the tree.
 Transactions without an `=` sign set the value to the key.
 The app has no replay protection (other than what the mempool provides).
@@ -12,7 +12,7 @@ The app has no replay protection (other than what the mempool provides).
 ## PersistentKVStoreApplication
 
 The PersistentKVStoreApplication wraps the KVStoreApplication
-and provides two additional features:
+and provides three additional features:
 
 1) persistence of state across app restarts (using Tendermint's ABCI-Handshake mechanism)
 2) validator set changes
@@ -27,4 +27,4 @@ Validator set changes are effected using the following transaction format:
 
 where `pubkeyN` is a base64-encoded 32-byte ed25519 key and `powerN` is a new voting power for the validator with `pubkeyN` (possibly a new one).
 To remove a validator from the validator set, set power to `0`.
-There is no sybil protection against new validators joining. 
+There is no sybil protection against new validators joining.

abci/example/kvstore/kvstore.go

@@ -171,3 +171,9 @@ func (app *Application) Query(reqQuery types.RequestQuery) (resQuery types.Respo
 
 	return resQuery
 }
+
+func (app *Application) PrepareProposal(
+	req types.RequestPrepareProposal) types.ResponsePrepareProposal {
+	return types.ResponsePrepareProposal{
+		BlockData: req.BlockData}
+}

abci/example/kvstore/persistent_kvstore.go

@@ -14,6 +14,7 @@ import (
 	cryptoenc "github.com/tendermint/tendermint/crypto/encoding"
 	"github.com/tendermint/tendermint/libs/log"
 	pc "github.com/tendermint/tendermint/proto/tendermint/crypto"
+	ptypes "github.com/tendermint/tendermint/proto/tendermint/types"
 )
 
 const (
@@ -76,6 +77,10 @@ func (app *PersistentKVStoreApplication) DeliverTx(req types.RequestDeliverTx) t
 		return app.execValidatorTx(req.Tx)
 	}
 
+	if isPrepareTx(req.Tx) {
+		return app.execPrepareTx(req.Tx)
+	}
+
 	// otherwise, update the key-value store
 	return app.app.DeliverTx(req)
 }
@@ -170,6 +175,24 @@ func (app *PersistentKVStoreApplication) ApplySnapshotChunk(
 	return types.ResponseApplySnapshotChunk{Result: types.ResponseApplySnapshotChunk_ABORT}
 }
 
+func (app *PersistentKVStoreApplication) ExtendVote(
+	req types.RequestExtendVote) types.ResponseExtendVote {
+	return types.ResponseExtendVote{
+		VoteExtension: ConstructVoteExtension(req.Vote.ValidatorAddress),
+	}
+}
+
+func (app *PersistentKVStoreApplication) VerifyVoteExtension(
+	req types.RequestVerifyVoteExtension) types.ResponseVerifyVoteExtension {
+	return types.RespondVerifyVoteExtension(
+		app.verifyExtension(req.Vote.ValidatorAddress, req.Vote.VoteExtension))
+}
+
+func (app *PersistentKVStoreApplication) PrepareProposal(
+	req types.RequestPrepareProposal) types.ResponsePrepareProposal {
+	return types.ResponsePrepareProposal{BlockData: app.substPrepareTx(req.BlockData)}
+}
+
 //---------------------------------------------
 // update validators
 
@@ -284,3 +307,51 @@ func (app *PersistentKVStoreApplication) updateValidator(v types.ValidatorUpdate
 
 	return types.ResponseDeliverTx{Code: code.CodeTypeOK}
 }
+
+// -----------------------------
+
+const PreparePrefix = "prepare"
+
+func isPrepareTx(tx []byte) bool {
+	return strings.HasPrefix(string(tx), PreparePrefix)
+}
+
+// execPrepareTx is noop. tx data is considered as placeholder
+// and is substitute at the PrepareProposal.
+func (app *PersistentKVStoreApplication) execPrepareTx(tx []byte) types.ResponseDeliverTx {
+	// noop
+	return types.ResponseDeliverTx{}
+}
+
+// substPrepareTx subst all the preparetx in the blockdata
+// to null string(could be any arbitrary string).
+func (app *PersistentKVStoreApplication) substPrepareTx(blockData [][]byte) [][]byte {
+	for i, tx := range blockData {
+		if isPrepareTx(tx) {
+			blockData[i] = make([]byte, len(tx))
+		}
+	}
+
+	return blockData
+}
+
+func ConstructVoteExtension(valAddr []byte) *ptypes.VoteExtension {
+	return &ptypes.VoteExtension{
+		AppDataToSign:             valAddr,
+		AppDataSelfAuthenticating: valAddr,
+	}
+}
+
+func (app *PersistentKVStoreApplication) verifyExtension(valAddr []byte, ext *ptypes.VoteExtension) bool {
+	if ext == nil {
+		return false
+	}
+	canonical := ConstructVoteExtension(valAddr)
+	if !bytes.Equal(canonical.AppDataToSign, ext.AppDataToSign) {
+		return false
+	}
+	if !bytes.Equal(canonical.AppDataSelfAuthenticating, ext.AppDataSelfAuthenticating) {
+		return false
+	}
+	return true
+}

abci/server/socket_server.go

@@ -227,12 +227,21 @@ func (s *SocketServer) handleRequest(req *types.Request, responses chan<- *types
 	case *types.Request_OfferSnapshot:
 		res := s.app.OfferSnapshot(*r.OfferSnapshot)
 		responses <- types.ToResponseOfferSnapshot(res)
+	case *types.Request_PrepareProposal:
+		res := s.app.PrepareProposal(*r.PrepareProposal)
+		responses <- types.ToResponsePrepareProposal(res)
 	case *types.Request_LoadSnapshotChunk:
 		res := s.app.LoadSnapshotChunk(*r.LoadSnapshotChunk)
 		responses <- types.ToResponseLoadSnapshotChunk(res)
 	case *types.Request_ApplySnapshotChunk:
 		res := s.app.ApplySnapshotChunk(*r.ApplySnapshotChunk)
 		responses <- types.ToResponseApplySnapshotChunk(res)
+	case *types.Request_ExtendVote:
+		res := s.app.ExtendVote(*r.ExtendVote)
+		responses <- types.ToResponseExtendVote(res)
+	case *types.Request_VerifyVoteExtension:
+		res := s.app.VerifyVoteExtension(*r.VerifyVoteExtension)
+		responses <- types.ToResponseVerifyVoteExtension(res)
 	default:
 		responses <- types.ToResponseException("Unknown request")
 	}

abci/types/application.go

@@ -17,11 +17,20 @@ type Application interface {
 	CheckTx(RequestCheckTx) ResponseCheckTx // Validate a tx for the mempool
 
 	// Consensus Connection
-	InitChain(RequestInitChain) ResponseInitChain    // Initialize blockchain w validators/other info from TendermintCore
-	BeginBlock(RequestBeginBlock) ResponseBeginBlock // Signals the beginning of a block
-	DeliverTx(RequestDeliverTx) ResponseDeliverTx    // Deliver a tx for full processing
-	EndBlock(RequestEndBlock) ResponseEndBlock       // Signals the end of a block, returns changes to the validator set
-	Commit() ResponseCommit                          // Commit the state and return the application Merkle root hash
+	InitChain(RequestInitChain) ResponseInitChain // Initialize blockchain w validators/other info from TendermintCore
+	PrepareProposal(RequestPrepareProposal) ResponsePrepareProposal
+	// Signals the beginning of a block
+	BeginBlock(RequestBeginBlock) ResponseBeginBlock
+	// Deliver a tx for full processing
+	DeliverTx(RequestDeliverTx) ResponseDeliverTx
+	// Signals the end of a block, returns changes to the validator set
+	EndBlock(RequestEndBlock) ResponseEndBlock
+	// Commit the state and return the application Merkle root hash
+	Commit() ResponseCommit
+	// Create application specific vote extension
+	ExtendVote(RequestExtendVote) ResponseExtendVote
+	// Verify application's vote extension data
+	VerifyVoteExtension(RequestVerifyVoteExtension) ResponseVerifyVoteExtension
 
 	// State Sync Connection
 	ListSnapshots(RequestListSnapshots) ResponseListSnapshots                // List available snapshots
@@ -58,6 +67,14 @@ func (BaseApplication) Commit() ResponseCommit {
 	return ResponseCommit{}
 }
 
+func (BaseApplication) ExtendVote(req RequestExtendVote) ResponseExtendVote {
+	return ResponseExtendVote{}
+}
+
+func (BaseApplication) VerifyVoteExtension(req RequestVerifyVoteExtension) ResponseVerifyVoteExtension {
+	return ResponseVerifyVoteExtension{}
+}
+
 func (BaseApplication) Query(req RequestQuery) ResponseQuery {
 	return ResponseQuery{Code: CodeTypeOK}
 }
@@ -90,6 +107,10 @@ func (BaseApplication) ApplySnapshotChunk(req RequestApplySnapshotChunk) Respons
 	return ResponseApplySnapshotChunk{}
 }
 
+func (BaseApplication) PrepareProposal(req RequestPrepareProposal) ResponsePrepareProposal {
+	return ResponsePrepareProposal{}
+}
+
 //-------------------------------------------------------
 
 // GRPCApplication is a GRPC wrapper for Application
@@ -172,3 +193,21 @@ func (app *GRPCApplication) ApplySnapshotChunk(
 	res := app.app.ApplySnapshotChunk(*req)
 	return &res, nil
 }
+
+func (app *GRPCApplication) ExtendVote(
+	ctx context.Context, req *RequestExtendVote) (*ResponseExtendVote, error) {
+	res := app.app.ExtendVote(*req)
+	return &res, nil
+}
+
+func (app *GRPCApplication) VerifyVoteExtension(
+	ctx context.Context, req *RequestVerifyVoteExtension) (*ResponseVerifyVoteExtension, error) {
+	res := app.app.VerifyVoteExtension(*req)
+	return &res, nil
+}
+
+func (app *GRPCApplication) PrepareProposal(
+	ctx context.Context, req *RequestPrepareProposal) (*ResponsePrepareProposal, error) {
+	res := app.app.PrepareProposal(*req)
+	return &res, nil
+}

abci/types/messages.go

@@ -15,11 +15,7 @@ const (
 func WriteMessage(msg proto.Message, w io.Writer) error {
 	protoWriter := protoio.NewDelimitedWriter(w)
 	_, err := protoWriter.WriteMsg(msg)
-	if err != nil {
-		return err
-	}
-
-	return nil
+	return err
 }
 
 // ReadMessage reads a varint length-delimited protobuf message.
@@ -114,6 +110,24 @@ func ToRequestApplySnapshotChunk(req RequestApplySnapshotChunk) *Request {
 	}
 }
 
+func ToRequestExtendVote(req RequestExtendVote) *Request {
+	return &Request{
+		Value: &Request_ExtendVote{&req},
+	}
+}
+
+func ToRequestVerifyVoteExtension(req RequestVerifyVoteExtension) *Request {
+	return &Request{
+		Value: &Request_VerifyVoteExtension{&req},
+	}
+}
+
+func ToRequestPrepareProposal(req RequestPrepareProposal) *Request {
+	return &Request{
+		Value: &Request_PrepareProposal{&req},
+	}
+}
+
 //----------------------------------------
 
 func ToResponseException(errStr string) *Response {
@@ -204,3 +218,21 @@ func ToResponseApplySnapshotChunk(res ResponseApplySnapshotChunk) *Response {
 		Value: &Response_ApplySnapshotChunk{&res},
 	}
 }
+
+func ToResponseExtendVote(res ResponseExtendVote) *Response {
+	return &Response{
+		Value: &Response_ExtendVote{&res},
+	}
+}
+
+func ToResponseVerifyVoteExtension(res ResponseVerifyVoteExtension) *Response {
+	return &Response{
+		Value: &Response_VerifyVoteExtension{&res},
+	}
+}
+
+func ToResponsePrepareProposal(res ResponsePrepareProposal) *Response {
+	return &Response{
+		Value: &Response_PrepareProposal{&res},
+	}
+}

abci/types/result.go

@@ -5,6 +5,8 @@ import (
 	"encoding/json"
 
 	"github.com/gogo/protobuf/jsonpb"
+
+	types "github.com/tendermint/tendermint/proto/tendermint/types"
 )
 
 const (
@@ -41,6 +43,16 @@ func (r ResponseQuery) IsErr() bool {
 	return r.Code != CodeTypeOK
 }
 
+// IsOK returns true if Code is OK
+func (r ResponseVerifyVoteExtension) IsOK() bool {
+	return r.Result <= ResponseVerifyVoteExtension_ACCEPT
+}
+
+// IsErr returns true if Code is something other than OK.
+func (r ResponseVerifyVoteExtension) IsErr() bool {
+	return r.Result > ResponseVerifyVoteExtension_ACCEPT
+}
+
 //---------------------------------------------------------------------------
 // override JSON marshaling so we emit defaults (ie. disable omitempty)
 
@@ -118,3 +130,25 @@ var _ jsonRoundTripper = (*ResponseDeliverTx)(nil)
 var _ jsonRoundTripper = (*ResponseCheckTx)(nil)
 
 var _ jsonRoundTripper = (*EventAttribute)(nil)
+
+// -----------------------------------------------
+// construct Result data
+
+func RespondExtendVote(appDataToSign, appDataSelfAuthenticating []byte) ResponseExtendVote {
+	return ResponseExtendVote{
+		VoteExtension: &types.VoteExtension{
+			AppDataToSign:             appDataToSign,
+			AppDataSelfAuthenticating: appDataSelfAuthenticating,
+		},
+	}
+}
+
+func RespondVerifyVoteExtension(ok bool) ResponseVerifyVoteExtension {
+	result := ResponseVerifyVoteExtension_REJECT
+	if ok {
+		result = ResponseVerifyVoteExtension_ACCEPT
+	}
+	return ResponseVerifyVoteExtension{
+		Result: result,
+	}
+}

cmd/tendermint/commands/gen_node_key.go

@@ -12,11 +12,9 @@ import (
 // GenNodeKeyCmd allows the generation of a node key. It prints JSON-encoded
 // NodeKey to the standard output.
 var GenNodeKeyCmd = &cobra.Command{
-	Use:     "gen-node-key",
-	Aliases: []string{"gen_node_key"},
-	Short:   "Generate a new node key",
-	RunE:    genNodeKey,
-	PreRun:  deprecateSnakeCase,
+	Use:   "gen-node-key",
+	Short: "Generate a new node key",
+	RunE:  genNodeKey,
 }
 
 func genNodeKey(cmd *cobra.Command, args []string) error {

cmd/tendermint/commands/gen_validator.go

@@ -13,11 +13,9 @@ import (
 // GenValidatorCmd allows the generation of a keypair for a
 // validator.
 var GenValidatorCmd = &cobra.Command{
-	Use:     "gen-validator",
-	Aliases: []string{"gen_validator"},
-	Short:   "Generate new validator keypair",
-	RunE:    genValidator,
-	PreRun:  deprecateSnakeCase,
+	Use:   "gen-validator",
+	Short: "Generate new validator keypair",
+	RunE:  genValidator,
 }
 
 func init() {

cmd/tendermint/commands/inspect.go

@@ -0,0 +1,87 @@
+package commands
+
+import (
+	"context"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/spf13/cobra"
+
+	cfg "github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/inspect"
+	"github.com/tendermint/tendermint/state"
+	"github.com/tendermint/tendermint/state/indexer/sink"
+	"github.com/tendermint/tendermint/store"
+	"github.com/tendermint/tendermint/types"
+)
+
+// InspectCmd is the command for starting an inspect server.
+var InspectCmd = &cobra.Command{
+	Use:   "inspect",
+	Short: "Run an inspect server for investigating Tendermint state",
+	Long: `
+	inspect runs a subset of Tendermint's RPC endpoints that are useful for debugging
+	issues with Tendermint.
+
+	When the Tendermint consensus engine detects inconsistent state, it will crash the
+	tendermint process. Tendermint will not start up while in this inconsistent state. 
+	The inspect command can be used to query the block and state store using Tendermint
+	RPC calls to debug issues of inconsistent state.
+	`,
+
+	RunE: runInspect,
+}
+
+func init() {
+	InspectCmd.Flags().
+		String("rpc.laddr",
+			config.RPC.ListenAddress, "RPC listenener address. Port required")
+	InspectCmd.Flags().
+		String("db-backend",
+			config.DBBackend, "database backend: goleveldb | cleveldb | boltdb | rocksdb | badgerdb")
+	InspectCmd.Flags().
+		String("db-dir", config.DBPath, "database directory")
+}
+
+func runInspect(cmd *cobra.Command, args []string) error {
+	ctx, cancel := context.WithCancel(cmd.Context())
+	defer cancel()
+
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGTERM, syscall.SIGINT)
+	go func() {
+		<-c
+		cancel()
+	}()
+
+	blockStoreDB, err := cfg.DefaultDBProvider(&cfg.DBContext{ID: "blockstore", Config: config})
+	if err != nil {
+		return err
+	}
+	blockStore := store.NewBlockStore(blockStoreDB)
+	stateDB, err := cfg.DefaultDBProvider(&cfg.DBContext{ID: "state", Config: config})
+	if err != nil {
+		if err := blockStoreDB.Close(); err != nil {
+			logger.Error("error closing block store db", "error", err)
+		}
+		return err
+	}
+	genDoc, err := types.GenesisDocFromFile(config.GenesisFile())
+	if err != nil {
+		return err
+	}
+	sinks, err := sink.EventSinksFromConfig(config, cfg.DefaultDBProvider, genDoc.ChainID)
+	if err != nil {
+		return err
+	}
+	stateStore := state.NewStore(stateDB)
+
+	ins := inspect.New(config.RPC, blockStore, stateStore, sinks, logger)
+
+	logger.Info("starting inspect server")
+	if err := ins.Run(ctx); err != nil {
+		return err
+	}
+	return nil
+}

cmd/tendermint/commands/key_migrate.go

@@ -0,0 +1,64 @@
+package commands
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/spf13/cobra"
+	cfg "github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/scripts/keymigrate"
+)
+
+func MakeKeyMigrateCommand() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "key-migrate",
+		Short: "Run Database key migration",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			ctx, cancel := context.WithCancel(cmd.Context())
+			defer cancel()
+
+			contexts := []string{
+				// this is ordered to put the
+				// (presumably) biggest/most important
+				// subsets first.
+				"blockstore",
+				"state",
+				"peerstore",
+				"tx_index",
+				"evidence",
+				"light",
+			}
+
+			for idx, dbctx := range contexts {
+				logger.Info("beginning a key migration",
+					"dbctx", dbctx,
+					"num", idx+1,
+					"total", len(contexts),
+				)
+
+				db, err := cfg.DefaultDBProvider(&cfg.DBContext{
+					ID:     dbctx,
+					Config: config,
+				})
+
+				if err != nil {
+					return fmt.Errorf("constructing database handle: %w", err)
+				}
+
+				if err = keymigrate.Migrate(ctx, db); err != nil {
+					return fmt.Errorf("running migration for context %q: %w",
+						dbctx, err)
+				}
+			}
+
+			logger.Info("completed database migration successfully")
+
+			return nil
+		},
+	}
+
+	// allow database info to be overridden via cli
+	addDBFlags(cmd)
+
+	return cmd
+}

cmd/tendermint/commands/probe_upnp.go

@@ -11,11 +11,9 @@ import (
 
 // ProbeUpnpCmd adds capabilities to test the UPnP functionality.
 var ProbeUpnpCmd = &cobra.Command{
-	Use:     "probe-upnp",
-	Aliases: []string{"probe_upnp"},
-	Short:   "Test UPnP functionality",
-	RunE:    probeUpnp,
-	PreRun:  deprecateSnakeCase,
+	Use:   "probe-upnp",
+	Short: "Test UPnP functionality",
+	RunE:  probeUpnp,
 }
 
 func probeUpnp(cmd *cobra.Command, args []string) error {

cmd/tendermint/commands/reindex_event.go

@@ -0,0 +1,251 @@
+package commands
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+	tmdb "github.com/tendermint/tm-db"
+
+	abcitypes "github.com/tendermint/tendermint/abci/types"
+	tmcfg "github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/internal/libs/progressbar"
+	ctypes "github.com/tendermint/tendermint/rpc/core/types"
+	"github.com/tendermint/tendermint/state"
+	"github.com/tendermint/tendermint/state/indexer"
+	"github.com/tendermint/tendermint/state/indexer/sink/kv"
+	"github.com/tendermint/tendermint/state/indexer/sink/psql"
+	"github.com/tendermint/tendermint/store"
+	"github.com/tendermint/tendermint/types"
+)
+
+const (
+	reindexFailed = "event re-index failed: "
+)
+
+// ReIndexEventCmd allows re-index the event by given block height interval
+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.
+	`,
+	Example: `
+	tendermint reindex-event
+	tendermint reindex-event --start-height 2
+	tendermint reindex-event --end-height 10
+	tendermint reindex-event --start-height 2 --end-height 10
+	`,
+	Run: func(cmd *cobra.Command, args []string) {
+		bs, ss, err := loadStateAndBlockStore(config)
+		if err != nil {
+			fmt.Println(reindexFailed, err)
+			return
+		}
+
+		if err := checkValidHeight(bs); err != nil {
+			fmt.Println(reindexFailed, err)
+			return
+		}
+
+		es, err := loadEventSinks(config)
+		if err != nil {
+			fmt.Println(reindexFailed, err)
+			return
+		}
+
+		if err = eventReIndex(cmd, es, bs, ss); err != nil {
+			fmt.Println(reindexFailed, err)
+			return
+		}
+
+		fmt.Println("event re-index finished")
+	},
+}
+
+var (
+	startHeight int64
+	endHeight   int64
+)
+
+func init() {
+	ReIndexEventCmd.Flags().Int64Var(&startHeight, "start-height", 0, "the block height would like to start for re-index")
+	ReIndexEventCmd.Flags().Int64Var(&endHeight, "end-height", 0, "the block height would like to finish for re-index")
+}
+
+func loadEventSinks(cfg *tmcfg.Config) ([]indexer.EventSink, error) {
+	// Check duplicated sinks.
+	sinks := map[string]bool{}
+	for _, s := range cfg.TxIndex.Indexer {
+		sl := strings.ToLower(s)
+		if sinks[sl] {
+			return nil, errors.New("found duplicated sinks, please check the tx-index section in the config.toml")
+		}
+		sinks[sl] = true
+	}
+
+	eventSinks := []indexer.EventSink{}
+
+	for k := range sinks {
+		switch k {
+		case string(indexer.NULL):
+			return nil, errors.New("found null event sink, please check the tx-index section in the config.toml")
+		case string(indexer.KV):
+			store, err := tmcfg.DefaultDBProvider(&tmcfg.DBContext{ID: "tx_index", Config: cfg})
+			if err != nil {
+				return nil, err
+			}
+			eventSinks = append(eventSinks, kv.NewEventSink(store))
+		case string(indexer.PSQL):
+			conn := cfg.TxIndex.PsqlConn
+			if conn == "" {
+				return nil, errors.New("the psql connection settings cannot be empty")
+			}
+			es, err := psql.NewEventSink(conn, chainID)
+			if err != nil {
+				return nil, err
+			}
+			eventSinks = append(eventSinks, es)
+		default:
+			return nil, errors.New("unsupported event sink type")
+		}
+	}
+
+	if len(eventSinks) == 0 {
+		return nil, errors.New("no proper event sink can do event re-indexing," +
+			" please check the tx-index section in the config.toml")
+	}
+
+	if !indexer.IndexingEnabled(eventSinks) {
+		return nil, fmt.Errorf("no event sink has been enabled")
+	}
+
+	return eventSinks, nil
+}
+
+func loadStateAndBlockStore(cfg *tmcfg.Config) (*store.BlockStore, state.Store, error) {
+	dbType := tmdb.BackendType(cfg.DBBackend)
+
+	// Get BlockStore
+	blockStoreDB, err := tmdb.NewDB("blockstore", dbType, cfg.DBDir())
+	if err != nil {
+		return nil, nil, err
+	}
+	blockStore := store.NewBlockStore(blockStoreDB)
+
+	// Get StateStore
+	stateDB, err := tmdb.NewDB("state", dbType, cfg.DBDir())
+	if err != nil {
+		return nil, nil, err
+	}
+	stateStore := state.NewStore(stateDB)
+
+	return blockStore, stateStore, nil
+}
+
+func eventReIndex(cmd *cobra.Command, es []indexer.EventSink, bs state.BlockStore, ss state.Store) error {
+
+	var bar progressbar.Bar
+	bar.NewOption(startHeight-1, endHeight)
+
+	fmt.Println("start re-indexing events:")
+	defer bar.Finish()
+	for i := startHeight; i <= endHeight; i++ {
+		select {
+		case <-cmd.Context().Done():
+			return fmt.Errorf("event re-index terminated at height %d: %w", i, cmd.Context().Err())
+		default:
+			b := bs.LoadBlock(i)
+			if b == nil {
+				return fmt.Errorf("not able to load block at height %d from the blockstore", i)
+			}
+
+			r, err := ss.LoadABCIResponses(i)
+			if err != nil {
+				return fmt.Errorf("not able to load ABCI Response at height %d from the statestore", i)
+			}
+
+			e := types.EventDataNewBlockHeader{
+				Header:           b.Header,
+				NumTxs:           int64(len(b.Txs)),
+				ResultBeginBlock: *r.BeginBlock,
+				ResultEndBlock:   *r.EndBlock,
+			}
+
+			var batch *indexer.Batch
+			if e.NumTxs > 0 {
+				batch = indexer.NewBatch(e.NumTxs)
+
+				for i, tx := range b.Data.Txs {
+					tr := abcitypes.TxResult{
+						Height: b.Height,
+						Index:  uint32(i),
+						Tx:     tx,
+						Result: *(r.DeliverTxs[i]),
+					}
+
+					_ = batch.Add(&tr)
+				}
+			}
+
+			for _, sink := range es {
+				if err := sink.IndexBlockEvents(e); err != nil {
+					return fmt.Errorf("block event re-index at height %d failed: %w", i, err)
+				}
+
+				if batch != nil {
+					if err := sink.IndexTxEvents(batch.Ops); err != nil {
+						return fmt.Errorf("tx event re-index at height %d failed: %w", i, err)
+					}
+				}
+			}
+		}
+
+		bar.Play(i)
+	}
+
+	return nil
+}
+
+func checkValidHeight(bs state.BlockStore) error {
+	base := bs.Base()
+
+	if startHeight == 0 {
+		startHeight = base
+		fmt.Printf("set the start block height to the base height of the blockstore %d \n", base)
+	}
+
+	if startHeight < base {
+		return fmt.Errorf("%s (requested start height: %d, base height: %d)", ctypes.ErrHeightNotAvailable, startHeight, base)
+	}
+
+	height := bs.Height()
+
+	if startHeight > height {
+		return fmt.Errorf(
+			"%s (requested start height: %d, store height: %d)", ctypes.ErrHeightNotAvailable, startHeight, height)
+	}
+
+	if endHeight == 0 || endHeight > height {
+		endHeight = height
+		fmt.Printf("set the end block height to the latest height of the blockstore %d \n", height)
+	}
+
+	if endHeight < base {
+		return fmt.Errorf(
+			"%s (requested end height: %d, base height: %d)", ctypes.ErrHeightNotAvailable, endHeight, base)
+	}
+
+	if endHeight < startHeight {
+		return fmt.Errorf(
+			"%s (requested the end height: %d is less than the start height: %d)",
+			ctypes.ErrInvalidRequest, startHeight, endHeight)
+	}
+
+	return nil
+}

cmd/tendermint/commands/reindex_event_test.go

@@ -0,0 +1,171 @@
+package commands
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
+
+	abcitypes "github.com/tendermint/tendermint/abci/types"
+	tmcfg "github.com/tendermint/tendermint/config"
+	prototmstate "github.com/tendermint/tendermint/proto/tendermint/state"
+	"github.com/tendermint/tendermint/state/indexer"
+	"github.com/tendermint/tendermint/state/mocks"
+	"github.com/tendermint/tendermint/types"
+)
+
+const (
+	height int64 = 10
+	base   int64 = 2
+)
+
+func setupReIndexEventCmd() *cobra.Command {
+	reIndexEventCmd := &cobra.Command{
+		Use: ReIndexEventCmd.Use,
+		Run: func(cmd *cobra.Command, args []string) {},
+	}
+
+	_ = reIndexEventCmd.ExecuteContext(context.Background())
+
+	return reIndexEventCmd
+}
+
+func TestReIndexEventCheckHeight(t *testing.T) {
+	mockBlockStore := &mocks.BlockStore{}
+	mockBlockStore.
+		On("Base").Return(base).
+		On("Height").Return(height)
+
+	testCases := []struct {
+		startHeight int64
+		endHeight   int64
+		validHeight bool
+	}{
+		{0, 0, true},
+		{0, base, true},
+		{0, base - 1, false},
+		{0, height, true},
+		{0, height + 1, true},
+		{0, 0, true},
+		{base - 1, 0, false},
+		{base, 0, true},
+		{base, base, true},
+		{base, base - 1, false},
+		{base, height, true},
+		{base, height + 1, true},
+		{height, 0, true},
+		{height, base, false},
+		{height, height - 1, false},
+		{height, height, true},
+		{height, height + 1, true},
+		{height + 1, 0, false},
+	}
+
+	for _, tc := range testCases {
+		startHeight = tc.startHeight
+		endHeight = tc.endHeight
+
+		err := checkValidHeight(mockBlockStore)
+		if tc.validHeight {
+			require.NoError(t, err)
+		} else {
+			require.Error(t, err)
+		}
+	}
+}
+
+func TestLoadEventSink(t *testing.T) {
+	testCases := []struct {
+		sinks   []string
+		connURL string
+		loadErr bool
+	}{
+		{[]string{}, "", true},
+		{[]string{"NULL"}, "", true},
+		{[]string{"KV"}, "", false},
+		{[]string{"KV", "KV"}, "", true},
+		{[]string{"PSQL"}, "", true},         // true because empty connect url
+		{[]string{"PSQL"}, "wrongUrl", true}, // true because wrong connect url
+		// skip to test PSQL connect with correct url
+		{[]string{"UnsupportedSinkType"}, "wrongUrl", true},
+	}
+
+	for _, tc := range testCases {
+		cfg := tmcfg.TestConfig()
+		cfg.TxIndex.Indexer = tc.sinks
+		cfg.TxIndex.PsqlConn = tc.connURL
+		_, err := loadEventSinks(cfg)
+		if tc.loadErr {
+			require.Error(t, err)
+		} else {
+			require.NoError(t, err)
+		}
+	}
+}
+
+func TestLoadBlockStore(t *testing.T) {
+	bs, ss, err := loadStateAndBlockStore(tmcfg.TestConfig())
+	require.NoError(t, err)
+	require.NotNil(t, bs)
+	require.NotNil(t, ss)
+
+}
+func TestReIndexEvent(t *testing.T) {
+	mockBlockStore := &mocks.BlockStore{}
+	mockStateStore := &mocks.Store{}
+	mockEventSink := &mocks.EventSink{}
+
+	mockBlockStore.
+		On("Base").Return(base).
+		On("Height").Return(height).
+		On("LoadBlock", base).Return(nil).Once().
+		On("LoadBlock", base).Return(&types.Block{Data: types.Data{Txs: types.Txs{make(types.Tx, 1)}}}).
+		On("LoadBlock", height).Return(&types.Block{Data: types.Data{Txs: types.Txs{make(types.Tx, 1)}}})
+
+	mockEventSink.
+		On("Type").Return(indexer.KV).
+		On("IndexBlockEvents", mock.AnythingOfType("types.EventDataNewBlockHeader")).Return(errors.New("")).Once().
+		On("IndexBlockEvents", mock.AnythingOfType("types.EventDataNewBlockHeader")).Return(nil).
+		On("IndexTxEvents", mock.AnythingOfType("[]*types.TxResult")).Return(errors.New("")).Once().
+		On("IndexTxEvents", mock.AnythingOfType("[]*types.TxResult")).Return(nil)
+
+	dtx := abcitypes.ResponseDeliverTx{}
+	abciResp := &prototmstate.ABCIResponses{
+		DeliverTxs: []*abcitypes.ResponseDeliverTx{&dtx},
+		EndBlock:   &abcitypes.ResponseEndBlock{},
+		BeginBlock: &abcitypes.ResponseBeginBlock{},
+	}
+
+	mockStateStore.
+		On("LoadABCIResponses", base).Return(nil, errors.New("")).Once().
+		On("LoadABCIResponses", base).Return(abciResp, nil).
+		On("LoadABCIResponses", height).Return(abciResp, nil)
+
+	testCases := []struct {
+		startHeight int64
+		endHeight   int64
+		reIndexErr  bool
+	}{
+		{base, height, true}, // LoadBlock error
+		{base, height, true}, // LoadABCIResponses error
+		{base, height, true}, // index block event error
+		{base, height, true}, // index tx event error
+		{base, base, false},
+		{height, height, false},
+	}
+
+	for _, tc := range testCases {
+		startHeight = tc.startHeight
+		endHeight = tc.endHeight
+
+		err := eventReIndex(setupReIndexEventCmd(), []indexer.EventSink{mockEventSink}, mockBlockStore, mockStateStore)
+		if tc.reIndexErr {
+			require.Error(t, err)
+		} else {
+			require.NoError(t, err)
+		}
+	}
+}

cmd/tendermint/commands/replay.go

@@ -17,11 +17,9 @@ var ReplayCmd = &cobra.Command{
 // ReplayConsoleCmd allows replaying of messages from the WAL in a
 // console.
 var ReplayConsoleCmd = &cobra.Command{
-	Use:     "replay-console",
-	Aliases: []string{"replay_console"},
-	Short:   "Replay messages from WAL in a console",
+	Use:   "replay-console",
+	Short: "Replay messages from WAL in a console",
 	Run: func(cmd *cobra.Command, args []string) {
 		consensus.RunReplayFile(config.BaseConfig, config.Consensus, true)
 	},
-	PreRun: deprecateSnakeCase,
 }

cmd/tendermint/commands/reset_priv_validator.go

@@ -14,11 +14,9 @@ import (
 // ResetAllCmd removes the database of this Tendermint core
 // instance.
 var ResetAllCmd = &cobra.Command{
-	Use:     "unsafe-reset-all",
-	Aliases: []string{"unsafe_reset_all"},
-	Short:   "(unsafe) Remove all the data and WAL, reset this node's validator to genesis state",
-	RunE:    resetAll,
-	PreRun:  deprecateSnakeCase,
+	Use:   "unsafe-reset-all",
+	Short: "(unsafe) Remove all the data and WAL, reset this node's validator to genesis state",
+	RunE:  resetAll,
 }
 
 var keepAddrBook bool
@@ -31,11 +29,9 @@ func init() {
 
 // ResetPrivValidatorCmd resets the private validator files.
 var ResetPrivValidatorCmd = &cobra.Command{
-	Use:     "unsafe-reset-priv-validator",
-	Aliases: []string{"unsafe_reset_priv_validator"},
-	Short:   "(unsafe) Reset this node's validator to genesis state",
-	RunE:    resetPrivValidator,
-	PreRun:  deprecateSnakeCase,
+	Use:   "unsafe-reset-priv-validator",
+	Short: "(unsafe) Reset this node's validator to genesis state",
+	RunE:  resetPrivValidator,
 }
 
 // XXX: this is totally unsafe.

cmd/tendermint/commands/root.go

@@ -2,7 +2,6 @@ package commands
 
 import (
 	"fmt"
-	"strings"
 	"time"
 
 	"github.com/spf13/cobra"
@@ -65,10 +64,3 @@ var RootCmd = &cobra.Command{
 		return nil
 	},
 }
-
-// deprecateSnakeCase is a util function for 0.34.1. Should be removed in 0.35
-func deprecateSnakeCase(cmd *cobra.Command, args []string) {
-	if strings.Contains(cmd.CalledAs(), "_") {
-		fmt.Println("Deprecated: snake_case commands will be replaced by hyphen-case commands in the next major release")
-	}
-}

cmd/tendermint/commands/run_node.go

@@ -83,7 +83,10 @@ func AddNodeFlags(cmd *cobra.Command) {
 		config.Consensus.CreateEmptyBlocksInterval.String(),
 		"the possible interval between empty blocks")
 
-	// db flags
+	addDBFlags(cmd)
+}
+
+func addDBFlags(cmd *cobra.Command) {
 	cmd.Flags().String(
 		"db-backend",
 		config.DBBackend,

cmd/tendermint/commands/show_node_id.go

@@ -8,11 +8,9 @@ import (
 
 // ShowNodeIDCmd dumps node's ID to the standard output.
 var ShowNodeIDCmd = &cobra.Command{
-	Use:     "show-node-id",
-	Aliases: []string{"show_node_id"},
-	Short:   "Show this node's ID",
-	RunE:    showNodeID,
-	PreRun:  deprecateSnakeCase,
+	Use:   "show-node-id",
+	Short: "Show this node's ID",
+	RunE:  showNodeID,
 }
 
 func showNodeID(cmd *cobra.Command, args []string) error {

cmd/tendermint/commands/show_validator.go

@@ -16,11 +16,9 @@ import (
 
 // ShowValidatorCmd adds capabilities for showing the validator info.
 var ShowValidatorCmd = &cobra.Command{
-	Use:     "show-validator",
-	Aliases: []string{"show_validator"},
-	Short:   "Show this node's validator info",
-	RunE:    showValidator,
-	PreRun:  deprecateSnakeCase,
+	Use:   "show-validator",
+	Short: "Show this node's validator info",
+	RunE:  showValidator,
 }
 
 func showValidator(cmd *cobra.Command, args []string) error {

cmd/tendermint/main.go

@@ -15,6 +15,7 @@ func main() {
 	rootCmd := cmd.RootCmd
 	rootCmd.AddCommand(
 		cmd.GenValidatorCmd,
+		cmd.ReIndexEventCmd,
 		cmd.InitFilesCmd,
 		cmd.ProbeUpnpCmd,
 		cmd.LightCmd,
@@ -27,6 +28,8 @@ func main() {
 		cmd.ShowNodeIDCmd,
 		cmd.GenNodeKeyCmd,
 		cmd.VersionCmd,
+		cmd.InspectCmd,
+		cmd.MakeKeyMigrateCommand(),
 		debug.DebugCmd,
 		cli.NewCompletionCmd(rootCmd, true),
 	)

config/config.go

@@ -29,8 +29,8 @@ const (
 	ModeValidator = "validator"
 	ModeSeed      = "seed"
 
-	BlockchainV0 = "v0"
-	BlockchainV2 = "v2"
+	BlockSyncV0 = "v0"
+	BlockSyncV2 = "v2"
 
 	MempoolV0 = "v0"
 	MempoolV1 = "v1"
@@ -76,7 +76,7 @@ type Config struct {
 	P2P             *P2PConfig             `mapstructure:"p2p"`
 	Mempool         *MempoolConfig         `mapstructure:"mempool"`
 	StateSync       *StateSyncConfig       `mapstructure:"statesync"`
-	FastSync        *FastSyncConfig        `mapstructure:"fastsync"`
+	BlockSync       *BlockSyncConfig       `mapstructure:"fastsync"`
 	Consensus       *ConsensusConfig       `mapstructure:"consensus"`
 	TxIndex         *TxIndexConfig         `mapstructure:"tx-index"`
 	Instrumentation *InstrumentationConfig `mapstructure:"instrumentation"`
@@ -91,7 +91,7 @@ func DefaultConfig() *Config {
 		P2P:             DefaultP2PConfig(),
 		Mempool:         DefaultMempoolConfig(),
 		StateSync:       DefaultStateSyncConfig(),
-		FastSync:        DefaultFastSyncConfig(),
+		BlockSync:       DefaultBlockSyncConfig(),
 		Consensus:       DefaultConsensusConfig(),
 		TxIndex:         DefaultTxIndexConfig(),
 		Instrumentation: DefaultInstrumentationConfig(),
@@ -114,7 +114,7 @@ func TestConfig() *Config {
 		P2P:             TestP2PConfig(),
 		Mempool:         TestMempoolConfig(),
 		StateSync:       TestStateSyncConfig(),
-		FastSync:        TestFastSyncConfig(),
+		BlockSync:       TestBlockSyncConfig(),
 		Consensus:       TestConsensusConfig(),
 		TxIndex:         TestTxIndexConfig(),
 		Instrumentation: TestInstrumentationConfig(),
@@ -151,7 +151,7 @@ func (cfg *Config) ValidateBasic() error {
 	if err := cfg.StateSync.ValidateBasic(); err != nil {
 		return fmt.Errorf("error in [statesync] section: %w", err)
 	}
-	if err := cfg.FastSync.ValidateBasic(); err != nil {
+	if err := cfg.BlockSync.ValidateBasic(); err != nil {
 		return fmt.Errorf("error in [fastsync] section: %w", err)
 	}
 	if err := cfg.Consensus.ValidateBasic(); err != nil {
@@ -197,6 +197,7 @@ type BaseConfig struct { //nolint: maligned
 	// If this node is many blocks behind the tip of the chain, FastSync
 	// allows them to catchup quickly by downloading blocks in parallel
 	// and verifying their commits
+	// TODO: This should be moved to the blocksync config
 	FastSyncMode bool `mapstructure:"fast-sync"`
 
 	// Database backend: goleveldb | cleveldb | boltdb | rocksdb
@@ -693,13 +694,14 @@ type P2PConfig struct { //nolint: maligned
 	// Force dial to fail
 	TestDialFail bool `mapstructure:"test-dial-fail"`
 
-	// DisableLegacy is used mostly for testing to enable or disable the legacy
-	// P2P stack.
-	DisableLegacy bool `mapstructure:"disable-legacy"`
+	// UseLegacy enables the "legacy" P2P implementation and
+	// disables the newer default implementation. This flag will
+	// be removed in a future release.
+	UseLegacy bool `mapstructure:"use-legacy"`
 
 	// Makes it possible to configure which queue backend the p2p
 	// layer uses. Options are: "fifo", "priority" and "wdrr",
-	// with the default being "fifo".
+	// with the default being "priority".
 	QueueType string `mapstructure:"queue-type"`
 }
 
@@ -731,6 +733,7 @@ func DefaultP2PConfig() *P2PConfig {
 		DialTimeout:             3 * time.Second,
 		TestDialFail:            false,
 		QueueType:               "priority",
+		UseLegacy:               false,
 	}
 }
 
@@ -911,7 +914,7 @@ func DefaultStateSyncConfig() *StateSyncConfig {
 	}
 }
 
-// TestFastSyncConfig returns a default configuration for the state sync service
+// TestStateSyncConfig returns a default configuration for the state sync service
 func TestStateSyncConfig() *StateSyncConfig {
 	return DefaultStateSyncConfig()
 }
@@ -967,34 +970,33 @@ func (cfg *StateSyncConfig) ValidateBasic() error {
 }
 
 //-----------------------------------------------------------------------------
-// FastSyncConfig
 
-// FastSyncConfig defines the configuration for the Tendermint fast sync service
-type FastSyncConfig struct {
+// BlockSyncConfig (formerly known as FastSync) defines the configuration for the Tendermint block sync service
+type BlockSyncConfig struct {
 	Version string `mapstructure:"version"`
 }
 
-// DefaultFastSyncConfig returns a default configuration for the fast sync service
-func DefaultFastSyncConfig() *FastSyncConfig {
-	return &FastSyncConfig{
-		Version: BlockchainV0,
+// DefaultBlockSyncConfig returns a default configuration for the block sync service
+func DefaultBlockSyncConfig() *BlockSyncConfig {
+	return &BlockSyncConfig{
+		Version: BlockSyncV0,
 	}
 }
 
-// TestFastSyncConfig returns a default configuration for the fast sync.
-func TestFastSyncConfig() *FastSyncConfig {
-	return DefaultFastSyncConfig()
+// TestBlockSyncConfig returns a default configuration for the block sync.
+func TestBlockSyncConfig() *BlockSyncConfig {
+	return DefaultBlockSyncConfig()
 }
 
 // ValidateBasic performs basic validation.
-func (cfg *FastSyncConfig) ValidateBasic() error {
+func (cfg *BlockSyncConfig) ValidateBasic() error {
 	switch cfg.Version {
-	case BlockchainV0:
+	case BlockSyncV0:
 		return nil
-	case BlockchainV2:
-		return errors.New("fastsync version v2 is no longer supported. Please use v0")
+	case BlockSyncV2:
+		return errors.New("blocksync version v2 is no longer supported. Please use v0")
 	default:
-		return fmt.Errorf("unknown fastsync version %s", cfg.Version)
+		return fmt.Errorf("unknown blocksync version %s", cfg.Version)
 	}
 }
 

config/config_test.go

@@ -125,8 +125,8 @@ func TestStateSyncConfigValidateBasic(t *testing.T) {
 	require.NoError(t, cfg.ValidateBasic())
 }
 
-func TestFastSyncConfigValidateBasic(t *testing.T) {
-	cfg := TestFastSyncConfig()
+func TestBlockSyncConfigValidateBasic(t *testing.T) {
+	cfg := TestBlockSyncConfig()
 	assert.NoError(t, cfg.ValidateBasic())
 
 	// tamper with version

config/toml.go

@@ -271,7 +271,7 @@ pprof-laddr = "{{ .RPC.PprofListenAddress }}"
 [p2p]
 
 # Enable the new p2p layer.
-disable-legacy = {{ .P2P.DisableLegacy }}
+use-legacy = {{ .P2P.UseLegacy }}
 
 # Select the p2p internal queue
 queue-type = "{{ .P2P.QueueType }}"
@@ -452,14 +452,14 @@ chunk-request-timeout = "{{ .StateSync.ChunkRequestTimeout }}"
 fetchers = "{{ .StateSync.Fetchers }}"
 
 #######################################################
-###       Fast Sync Configuration Connections       ###
+###       Block Sync Configuration Connections       ###
 #######################################################
 [fastsync]
 
-# Fast Sync version to use:
-#   1) "v0" (default) - the legacy fast sync implementation
+# Block Sync version to use:
+#   1) "v0" (default) - the legacy block sync implementation
 #   2) "v2" - DEPRECATED, please use v0
-version = "{{ .FastSync.Version }}"
+version = "{{ .BlockSync.Version }}"
 
 #######################################################
 ###         Consensus Configuration Options         ###

crypto/merkle/proof.go

@@ -204,7 +204,10 @@ func (spn *ProofNode) FlattenAunts() [][]byte {
 		case spn.Right != nil:
 			innerHashes = append(innerHashes, spn.Right.Hash)
 		default:
-			break
+			// FIXME(fromberger): Per the documentation above, exactly one of
+			// these fields should be set. If that is true, this should probably
+			// be a panic since it violates the invariant. If not, when can it
+			// be OK to have no siblings? Does this occur at the leaves?
 		}
 		spn = spn.Parent
 	}

crypto/secp256k1/secp256k1.go

@@ -13,7 +13,7 @@ import (
 	tmjson "github.com/tendermint/tendermint/libs/json"
 
 	// necessary for Bitcoin address format
-	"golang.org/x/crypto/ripemd160" // nolint: staticcheck
+	"golang.org/x/crypto/ripemd160" // nolint
 )
 
 //-------------------------------------

docs/architecture/README.md

@@ -97,3 +97,6 @@ Note the context/background should be written in the present tense.
 - [ADR-041: Proposer-Selection-via-ABCI](./adr-041-proposer-selection-via-abci.md)
 - [ADR-045: ABCI-Evidence](./adr-045-abci-evidence.md)
 - [ADR-057: RPC](./adr-057-RPC.md)
+- [ADR-069: Node Initialization](./adr-069-flexible-node-initialization.md)
+- [ADR-071: Proposer-Based Timestamps](adr-071-proposer-based-timestamps.md)
+- [ADR-072: Restore Requests for Comments](./adr-072-request-for-comments.md)

docs/architecture/adr-065-custom-event-indexing.md

@@ -24,6 +24,7 @@
 - April 1, 2021: Initial Draft (@alexanderbez)
 - April 28, 2021: Specify search capabilities are only supported through the KV indexer (@marbar3778)
 - May 19, 2021: Update the SQL schema and the eventsink interface (@jayt106)
+- Aug 30, 2021: Update the SQL schema and the psql implementation (@creachadair)
 
 ## Status
 
@@ -145,163 +146,190 @@ The postgres eventsink will not support `tx_search`, `block_search`, `GetTxByHas
 ```sql
 -- Table Definition ----------------------------------------------
 
-CREATE TYPE block_event_type AS ENUM ('begin_block', 'end_block', '');
+-- The blocks table records metadata about each block.
+-- The block record does not include its events or transactions (see tx_results).
+CREATE TABLE blocks (
+  rowid      BIGSERIAL PRIMARY KEY,
 
-CREATE TABLE block_events (
-    id SERIAL PRIMARY KEY,
-    key VARCHAR NOT NULL,
-    value VARCHAR NOT NULL,
-    height INTEGER NOT NULL,
-    type block_event_type,
-    created_at TIMESTAMPTZ NOT NULL,
-    chain_id VARCHAR NOT NULL
+  height     BIGINT NOT NULL,
+  chain_id   VARCHAR NOT NULL,
+
+  -- When this block header was logged into the sink, in UTC.
+  created_at TIMESTAMPTZ NOT NULL,
+
+  UNIQUE (height, chain_id)
 );
 
+-- Index blocks by height and chain, since we need to resolve block IDs when
+-- indexing transaction records and transaction events.
+CREATE INDEX idx_blocks_height_chain ON blocks(height, chain_id);
+
+-- The tx_results table records metadata about transaction results.  Note that
+-- the events from a transaction are stored separately.
 CREATE TABLE tx_results (
-    id SERIAL PRIMARY KEY,
-    tx_result BYTEA NOT NULL,
-    created_at TIMESTAMPTZ NOT NULL
+  rowid BIGSERIAL PRIMARY KEY,
+
+  -- The block to which this transaction belongs.
+  block_id BIGINT NOT NULL REFERENCES blocks(rowid),
+  -- The sequential index of the transaction within the block.
+  index INTEGER NOT NULL,
+  -- When this result record was logged into the sink, in UTC.
+  created_at TIMESTAMPTZ NOT NULL,
+  -- The hex-encoded hash of the transaction.
+  tx_hash VARCHAR NOT NULL,
+  -- The protobuf wire encoding of the TxResult message.
+  tx_result BYTEA NOT NULL,
+
+  UNIQUE (block_id, index)
 );
 
-CREATE TABLE tx_events (
-    id SERIAL PRIMARY KEY,
-    key VARCHAR NOT NULL,
-    value VARCHAR NOT NULL,
-    height INTEGER NOT NULL,
-    hash VARCHAR NOT NULL,
-    tx_result_id SERIAL,
-    created_at TIMESTAMPTZ NOT NULL,
-    chain_id VARCHAR NOT NULL,
-    FOREIGN KEY (tx_result_id)
-        REFERENCES tx_results(id)
-        ON DELETE CASCADE
+-- The events table records events. All events (both block and transaction) are
+-- associated with a block ID; transaction events also have a transaction ID.
+CREATE TABLE events (
+  rowid BIGSERIAL PRIMARY KEY,
+
+  -- The block and transaction this event belongs to.
+  -- If tx_id is NULL, this is a block event.
+  block_id BIGINT NOT NULL REFERENCES blocks(rowid),
+  tx_id    BIGINT NULL REFERENCES tx_results(rowid),
+
+  -- The application-defined type label for the event.
+  type VARCHAR NOT NULL
 );
 
--- Indices -------------------------------------------------------
+-- The attributes table records event attributes.
+CREATE TABLE attributes (
+   event_id      BIGINT NOT NULL REFERENCES events(rowid),
+   key           VARCHAR NOT NULL, -- bare key
+   composite_key VARCHAR NOT NULL, -- composed type.key
+   value         VARCHAR NULL,
 
-CREATE INDEX idx_block_events_key_value ON block_events(key, value);
-CREATE INDEX idx_tx_events_key_value ON tx_events(key, value);
-CREATE INDEX idx_tx_events_hash ON tx_events(hash);
+   UNIQUE (event_id, key)
+);
+
+-- A joined view of events and their attributes. Events that do not have any
+-- attributes are represented as a single row with empty key and value fields.
+CREATE VIEW event_attributes AS
+  SELECT block_id, tx_id, type, key, composite_key, value
+  FROM events LEFT JOIN attributes ON (events.rowid = attributes.event_id);
+
+-- A joined view of all block events (those having tx_id NULL).
+CREATE VIEW block_events AS
+  SELECT blocks.rowid as block_id, height, chain_id, type, key, composite_key, value
+  FROM blocks JOIN event_attributes ON (blocks.rowid = event_attributes.block_id)
+  WHERE event_attributes.tx_id IS NULL;
+
+-- A joined view of all transaction events.
+CREATE VIEW tx_events AS
+  SELECT height, index, chain_id, type, key, composite_key, value, tx_results.created_at
+  FROM blocks JOIN tx_results ON (blocks.rowid = tx_results.block_id)
+  JOIN event_attributes ON (tx_results.rowid = event_attributes.tx_id)
+  WHERE event_attributes.tx_id IS NOT NULL;
 ```
 
 The `PSQLEventSink` will implement the `EventSink` interface as follows
 (some details omitted for brevity):
 
-
 ```go
-func NewPSQLEventSink(connStr string, chainID string) (*PSQLEventSink, error) {
-  db, err := sql.Open("postgres", connStr)
-  if err != nil {
-    return nil, err
-  }
+func NewEventSink(connStr, chainID string) (*EventSink, error) {
+	db, err := sql.Open(driverName, connStr)
+	// ...
 
-  // ...
+	return &EventSink{
+		store:   db,
+		chainID: chainID,
+	}, nil
 }
 
-func (es *PSQLEventSink) IndexBlockEvents(h types.EventDataNewBlockHeader) error {
-  sqlStmt := sq.Insert("block_events").Columns("key", "value", "height", "type", "created_at", "chain_id")
+func (es *EventSink) IndexBlockEvents(h types.EventDataNewBlockHeader) error {
+	ts := time.Now().UTC()
 
-  // index the reserved block height index
-  ts := time.Now()
-  sqlStmt = sqlStmt.Values(types.BlockHeightKey, h.Header.Height, h.Header.Height, "", ts, es.chainID)
+	return runInTransaction(es.store, func(tx *sql.Tx) error {
+		// Add the block to the blocks table and report back its row ID for use
+		// in indexing the events for the block.
+		blockID, err := queryWithID(tx, `
+INSERT INTO blocks (height, chain_id, created_at)
+  VALUES ($1, $2, $3)
+  ON CONFLICT DO NOTHING
+  RETURNING rowid;
+`, h.Header.Height, es.chainID, ts)
+		// ...
 
-  for _, event := range h.ResultBeginBlock.Events {
-    // only index events with a non-empty type
-    if len(event.Type) == 0 {
-      continue
-    }
-
-    for _, attr := range event.Attributes {
-      if len(attr.Key) == 0 {
-        continue
-      }
-
-      // index iff the event specified index:true and it's not a reserved event
-      compositeKey := fmt.Sprintf("%s.%s", event.Type, string(attr.Key))
-      if compositeKey == types.BlockHeightKey {
-        return fmt.Errorf("event type and attribute key \"%s\" is reserved; please use a different key", compositeKey)
-      }
-
-      if attr.GetIndex() {
-        sqlStmt = sqlStmt.Values(compositeKey, string(attr.Value), h.Header.Height, BlockEventTypeBeginBlock, ts, es.chainID)
-      }
-    }
-  }
-
-  // index end_block events...
-  // execute sqlStmt db query...
+		// Insert the special block meta-event for height.
+		if err := insertEvents(tx, blockID, 0, []abci.Event{
+			makeIndexedEvent(types.BlockHeightKey, fmt.Sprint(h.Header.Height)),
+		}); err != nil {
+			return fmt.Errorf("block meta-events: %w", err)
+		}
+		// Insert all the block events. Order is important here,
+		if err := insertEvents(tx, blockID, 0, h.ResultBeginBlock.Events); err != nil {
+			return fmt.Errorf("begin-block events: %w", err)
+		}
+		if err := insertEvents(tx, blockID, 0, h.ResultEndBlock.Events); err != nil {
+			return fmt.Errorf("end-block events: %w", err)
+		}
+		return nil
+	})
 }
 
-func (es *PSQLEventSink) IndexTxEvents(txr []*abci.TxResult) error {
-  sqlStmtEvents := sq.Insert("tx_events").Columns("key", "value", "height", "hash", "tx_result_id", "created_at", "chain_id")
-  sqlStmtTxResult := sq.Insert("tx_results").Columns("tx_result", "created_at")
+func (es *EventSink) IndexTxEvents(txrs []*abci.TxResult) error {
+	ts := time.Now().UTC()
 
-  ts := time.Now()
-  for _, tx := range txr {
-    // store the tx result
-    txBz, err := proto.Marshal(tx)
-    if err != nil {
-      return err
-    }
+	for _, txr := range txrs {
+		// Encode the result message in protobuf wire format for indexing.
+		resultData, err := proto.Marshal(txr)
+		// ...
 
-    sqlStmtTxResult = sqlStmtTxResult.Values(txBz, ts)
+		// Index the hash of the underlying transaction as a hex string.
+		txHash := fmt.Sprintf("%X", types.Tx(txr.Tx).Hash())
 
-    // execute sqlStmtTxResult db query...
-    var txID uint32
-    err = sqlStmtTxResult.QueryRow().Scan(&txID)
-		if err != nil {
+		if err := runInTransaction(es.store, func(tx *sql.Tx) error {
+			// Find the block associated with this transaction.
+			blockID, err := queryWithID(tx, `
+SELECT rowid FROM blocks WHERE height = $1 AND chain_id = $2;
+`, txr.Height, es.chainID)
+			// ...
+
+			// Insert a record for this tx_result and capture its ID for indexing events.
+			txID, err := queryWithID(tx, `
+INSERT INTO tx_results (block_id, index, created_at, tx_hash, tx_result)
+  VALUES ($1, $2, $3, $4, $5)
+  ON CONFLICT DO NOTHING
+  RETURNING rowid;
+`, blockID, txr.Index, ts, txHash, resultData)
+			// ...
+
+			// Insert the special transaction meta-events for hash and height.
+			if err := insertEvents(tx, blockID, txID, []abci.Event{
+				makeIndexedEvent(types.TxHashKey, txHash),
+				makeIndexedEvent(types.TxHeightKey, fmt.Sprint(txr.Height)),
+			}); err != nil {
+				return fmt.Errorf("indexing transaction meta-events: %w", err)
+			}
+			// Index any events packaged with the transaction.
+			if err := insertEvents(tx, blockID, txID, txr.Result.Events); err != nil {
+				return fmt.Errorf("indexing transaction events: %w", err)
+			}
+			return nil
+
+		}); err != nil {
 			return err
 		}
-
-    // index the reserved height and hash indices
-    hash := types.Tx(tx.Tx).Hash()
-    sqlStmtEvents = sqlStmtEvents.Values(types.TxHashKey, hash, tx.Height, hash, txID, ts, es.chainID)
-    sqlStmtEvents = sqlStmtEvents.Values(types.TxHeightKey, tx.Height, tx.Height, hash, txID, ts, es.chainID)
-
-    for _, event := range result.Result.Events {
-      // only index events with a non-empty type
-      if len(event.Type) == 0 {
-        continue
-      }
-
-      for _, attr := range event.Attributes {
-        if len(attr.Key) == 0 {
-          continue
-        }
-
-        // index if `index: true` is set
-        compositeTag := fmt.Sprintf("%s.%s", event.Type, string(attr.Key))
-			
-        // ensure event does not conflict with a reserved prefix key
-        if compositeTag == types.TxHashKey || compositeTag == types.TxHeightKey {
-          return fmt.Errorf("event type and attribute key \"%s\" is reserved; please use a different key", compositeTag)
-        }
-		
-        if attr.GetIndex() {
-          sqlStmtEvents = sqlStmtEvents.Values(compositeKey, string(attr.Value), tx.Height, hash, txID, ts, es.chainID)
-        }
-      }
-    }
-  }
-  
-  // execute sqlStmtEvents db query...
+	}
+	return nil
 }
 
-func (es *PSQLEventSink) SearchBlockEvents(ctx context.Context, q *query.Query) ([]int64, error) {
-  return nil, errors.New("block search is not supported via the postgres event sink")
-}
+// SearchBlockEvents is not implemented by this sink, and reports an error for all queries.
+func (es *EventSink) SearchBlockEvents(ctx context.Context, q *query.Query) ([]int64, error)
 
-func (es *PSQLEventSink) SearchTxEvents(ctx context.Context, q *query.Query) ([]*abci.TxResult, error) {
-  return nil, errors.New("tx search is not supported via the postgres event sink")
-}
+// SearchTxEvents is not implemented by this sink, and reports an error for all queries.
+func (es *EventSink) SearchTxEvents(ctx context.Context, q *query.Query) ([]*abci.TxResult, error)
 
-func (es *PSQLEventSink) GetTxByHash(hash []byte) (*abci.TxResult, error) {
-	return nil, errors.New("getTxByHash is not supported via the postgres event sink")
-}
+// GetTxByHash is not implemented by this sink, and reports an error for all queries.
+func (es *EventSink) GetTxByHash(hash []byte) (*abci.TxResult, error)
 
-func (es *PSQLEventSink) HasBlock(h int64) (bool, error) {
-	return false, errors.New("hasBlock is not supported via the postgres event sink")
-}
+// HasBlock is not implemented by this sink, and reports an error for all queries.
+func (es *EventSink) HasBlock(h int64) (bool, error)
 ```
 
 ### Configuration

docs/architecture/adr-069-flexible-node-intitalization.md

@@ -0,0 +1,273 @@
+# ADR 069: Flexible Node Initialization
+
+## Changlog
+
+- 2021-06-09: Initial Draft (@tychoish)
+
+- 2021-07-21: Major Revision (@tychoish)
+
+## Status
+
+Proposed.
+
+## Context
+
+In an effort to support [Go-API-Stability](./adr-060-go-api-stability.md),
+during the 0.35 development cycle, we have attempted to reduce the the API
+surface area by moving most of the interface of the `node` package into
+unexported functions, as well as moving the reactors to an `internal`
+package. Having this coincide with the 0.35 release made a lot of sense
+because these interfaces were _already_ changing as a result of the `p2p`
+[refactor](./adr-061-p2p-refactor-scope.md), so it made sense to think a bit
+more about how tendermint exposes this API.
+
+While the interfaces of the P2P layer and most of the node package are already
+internalized, this precludes some operational patterns that are important to
+users who use tendermint as a library. Specifically, introspecting the
+tendermint node service and replacing components is not supported in the latest
+version of the code, and some of these use cases would require maintaining a
+vendor copy of the code. Adding these features requires rather extensive
+(internal/implementation) changes to the `node` and `rpc` packages, and this
+ADR describes a model for changing the way that tendermint nodes initialize, in
+service of providing this kind of functionality.
+
+We consider node initialization, because the current implemention
+provides strong connections between all components, as well as between
+the components of the node and the RPC layer, and being able to think
+about the interactions of these components will help enable these
+features and help define the requirements of the node package.
+
+## Alternative Approaches
+
+These alternatives are presented to frame the design space and to
+contextualize the decision in terms of product requirements. These
+ideas are not inherently bad, and may even be possible or desireable
+in the (distant) future, and merely provide additional context for how
+we, in the moment came to our decision(s).
+
+### Do Nothing
+
+The current implementation is functional and sufficient for the vast
+majority of use cases (e.g., all users of the Cosmos-SDK as well as
+anyone who runs tendermint and the ABCI application in separate
+processes). In the current implementation, and even previous versions,
+modifying node initialization or injecting custom components required
+copying most of the `node` package, which required such users
+to maintain a vendored copy of tendermint.
+
+While this is (likely) not tenable in the long term, as users do want
+more modularity, and the current service implementation is brittle and
+difficult to maintain, in the short term it may be possible to delay
+implementation somewhat. Eventually, however, we will need to make the
+`node` package easier to maintain and reason about.
+
+### Generic Service Pluggability
+
+One possible system design would export interfaces (in the Golang
+sense) for all components of the system, to permit runtime dependency
+injection of all components in the system, so that users can compose
+tendermint nodes of arbitrary user-supplied components.
+
+Although this level of customization would provide benefits, it would be a huge
+undertaking (particularly with regards to API design work) that we do not have
+scope for at the moment.  Eventually providing support for some kinds of
+pluggability may be useful, so the current solution does not explicitly
+foreclose the possibility of this alternative.
+
+### Abstract Dependency Based Startup and Shutdown
+
+The main proposal in this document makes tendermint node initialization simpler
+and more abstract, but the system lacks a number of
+features which daemon/service initialization could provide, such as a
+system allowing the authors of services to control initialization and shutdown order
+of components using dependency relationships.
+
+Such a system could work by allowing services to declare
+initialization order dependencies to other reactors (by ID, perhaps)
+so that the node could decide the initialization based on the
+dependencies declared by services rather than requiring the node to
+encode this logic directly.
+
+This level of configuration is probably more complicated than is needed.  Given
+that the authors of components in the current implementation of tendermint
+already *do* need to know about other components, a dependency-based system
+would probably be overly-abstract at this stage.
+
+## Decisions
+
+- To the greatest extent possible, factor the code base so that
+  packages are responsible for their own initialization, and minimize
+  the amount of code in the `node` package itself.
+
+- As a design goal, reduce direct coupling and dependencies between
+  components in the implementation of `node`.
+
+- Begin iterating on a more-flexible internal framework for
+  initializing tendermint nodes to make the initatilization process
+  less hard-coded by the implementation of the node objects.
+
+  - Reactors should not need to expose their interfaces *within* the
+	implementation of the node type
+
+  - This refactoring should be entirely opaque to users.
+
+  - These node initialization changes should not require a
+	reevaluation of the `service.Service` or a generic initialization
+	orchestration framework.
+
+- Do not proactively provide a system for injecting
+  components/services within a tendtermint node, though make it
+  possible to retrofit this kind of plugability in the future if
+  needed.
+
+- Prioritize implementation of p2p-based statesync reactor to obviate
+  need for users to inject a custom state-sync provider.
+
+## Detailed Design
+
+The [current
+nodeImpl](https://github.com/tendermint/tendermint/blob/master/node/node.go#L47)
+includes direct references to the implementations of each of the
+reactors, which should be replaced by references to `service.Service`
+objects. This will require moving construction of the [rpc
+service](https://github.com/tendermint/tendermint/blob/master/node/node.go#L771)
+into the constructor of
+[makeNode](https://github.com/tendermint/tendermint/blob/master/node/node.go#L126). One
+possible implementation of this would be to eliminate the current
+`ConfigureRPC` method on the node package and instead [configure it
+here](https://github.com/tendermint/tendermint/pull/6798/files#diff-375d57e386f20eaa5f09f02bb9d28bfc48ac3dca18d0325f59492208219e5618R441).
+
+To avoid adding complexity to the `node` package, we will add a
+composite service implementation to the `service` package
+that implements `service.Service` and is composed of a sequence of
+underlying `service.Service` objects and handles their
+startup/shutdown in the specified sequential order.
+
+Consensus, blocksync (*née* fast sync), and statesync all depend on
+each other, and have significant initialization dependencies that are
+presently encoded in the `node` package. As part of this change, a
+new package/component (likely named `blocks` located at
+`internal/blocks`) will encapsulate the initialization of these block
+management areas of the code.
+
+### Injectable Component Option
+
+This section briefly describes a possible implementation for
+user-supplied services running within a node. This should not be
+implemented unless user-supplied components are a hard requirement for
+a user.
+
+In order to allow components to be replaced, a new public function
+will be added to the public interface of `node` with a signature that
+resembles the following:
+
+```go
+func NewWithServices(conf *config.Config,
+	logger log.Logger,
+	cf proxy.ClientCreator,
+	gen *types.GenesisDoc,
+	srvs []service.Service,
+) (service.Service, error) {
+```
+
+The `service.Service` objects will be initialized in the order supplied, after
+all pre-configured/default services have started (and shut down in reverse
+order).  The given services may implement additional interfaces, allowing them
+to replace specific default services. `NewWithServices` will validate input
+service lists with the following rules:
+
+- None of the services may already be running.
+- The caller may not supply more than one replacement reactor for a given
+  default service type.
+
+If callers violate any of these rules, `NewWithServices` will return
+an error. To retract support for this kind of operation in the future,
+the function can be modified to *always* return an error.
+
+## Consequences
+
+### Positive
+
+- The node package will become easier to maintain.
+
+- It will become easier to add additional services within tendermint
+  nodes.
+
+- It will become possible to replace default components in the node
+  package without vendoring the tendermint repo and modifying internal
+  code.
+
+- The current end-to-end (e2e) test suite will be able to prevent any
+  regressions, and the new functionality can be thoroughly unit tested.
+
+- The scope of this project is very narrow, which minimizes risk.
+
+### Negative
+
+- This increases our reliance on the `service.Service` interface which
+  is probably not an interface that we want to fully commit to.
+
+- This proposal implements a fairly minimal set of functionality and
+  leaves open the possibility for many additional features which are
+  not included in the scope of this proposal.
+
+### Neutral
+
+N/A
+
+## Open Questions
+
+- To what extent does this new initialization framework need to accommodate
+  the legacy p2p stack? Would it be possible to delay a great deal of this
+  work to the 0.36 cycle to avoid this complexity?
+
+  - Answer: _depends on timing_, and the requirement to ship pluggable reactors in 0.35.
+
+- Where should additional public types be exported for the 0.35
+  release?
+
+  Related to the general project of API stabilization we want to deprecate
+  the `types` package, and move its contents into a new `pkg` hierarchy;
+  however, the design of the `pkg` interface is currently underspecified.
+  If `types` is going to remain for the 0.35 release, then we should consider
+  the impact of using multiple organizing modalities for this code within a
+  single release.
+
+## Future Work
+
+- Improve or simplify the `service.Service` interface. There are some
+  pretty clear limitations with this interface as written (there's no
+  way to timeout slow startup or shut down, the cycle between the
+  `service.BaseService` and `service.Service` implementations is
+  troubling, the default panic in `OnReset` seems troubling.)
+
+- As part of the refactor of `service.Service` have all services/nodes
+  respect the lifetime of a `context.Context` object, and avoid the
+  current practice of creating `context.Context` objects in p2p and
+  reactor code. This would be required for in-process multi-tenancy.
+
+- Support explicit dependencies between components and allow for
+  parallel startup, so that different reactors can startup at the same
+  time, where possible.
+
+## References
+
+- [this
+  branch](https://github.com/tendermint/tendermint/tree/tychoish/scratch-node-minimize)
+  contains experimental work in the implementation of the node package
+  to unwind some of the hard dependencies between components.
+
+- [the component
+  graph](https://peter.bourgon.org/go-for-industrial-programming/#the-component-graph)
+  as a framing for internal service construction.
+
+## Appendix
+
+### Dependencies
+
+There's a relationship between the blockchain and consensus reactor
+described by the following dependency graph makes replacing some of
+these components more difficult relative to other reactors or
+components.
+
+![consensus blockchain dependency graph](./img/consensus_blockchain.png)

docs/architecture/adr-071-proposer-based-timestamps.md

@@ -0,0 +1,445 @@
+# ADR 71: Proposer-Based Timestamps
+
+* [Changelog](#changelog)
+* [Status](#status)
+* [Context](#context)
+* [Alternative Approaches](#alternative-approaches)
+	* [Remove timestamps altogether](#remove-timestamps-altogether)
+* [Decision](#decision)
+* [Detailed Design](#detailed-design)
+	* [Overview](#overview)
+	* [Proposal Timestamp and Block Timestamp](#proposal-timestamp-and-block-timestamp)
+	* [Saving the timestamp across heights](#saving-the-timestamp-across-heights)
+	* [Changes to `CommitSig`](#changes-to-commitsig)
+	* [Changes to `Commit`](#changes-to-commit)
+	* [Changes to `Vote` messages](#changes-to-vote-messages)
+	* [New consensus parameters](#new-consensus-parameters)
+	* [Changes to `Header`](#changes-to-header)
+	* [Changes to the block proposal step](#changes-to-the-block-proposal-step)
+		* [Proposer selects proposal timestamp](#proposer-selects-proposal-timestamp)
+		* [Proposer selects block timestamp](#proposer-selects-block-timestamp)
+		* [Proposer waits](#proposer-waits)
+		* [Changes to the propose step timeout](#changes-to-the-propose-step-timeout)
+	* [Changes to validation rules](#changes-to-validation-rules)
+		* [Proposal timestamp validation](#proposal-timestamp-validation)
+		* [Block timestamp validation](#block-timestamp-validation)
+	* [Changes to the prevote step](#changes-to-the-prevote-step)
+	* [Changes to the precommit step](#changes-to-the-precommit-step)
+	* [Changes to locking a block](#changes-to-locking-a-block)
+	* [Remove voteTime Completely](#remove-votetime-completely)
+* [Future Improvements](#future-improvements)
+* [Consequences](#consequences)
+	* [Positive](#positive)
+	* [Neutral](#neutral)
+	* [Negative](#negative)
+* [References](#references)
+
+## Changelog
+
+ - July 15 2021: Created by @williambanfield 
+ - Aug 4 2021: Draft completed by @williambanfield
+ - Aug 5 2021: Draft updated to include data structure changes by @williambanfield
+ - Aug 20 2021: Language edits completed by @williambanfield
+
+## Status
+
+ **Accepted**
+
+## Context
+
+Tendermint currently provides a monotonically increasing source of time known as [BFTTime](https://github.com/tendermint/spec/blob/master/spec/consensus/bft-time.md).
+This mechanism for producing a source of time is reasonably simple.
+Each correct validator adds a timestamp to each `Precommit` message it sends.
+The timestamp it sends is either the validator's current known Unix time or one millisecond greater than the previous block time, depending on which value is greater.
+When a block is produced, the proposer chooses the block timestamp as the weighted median of the times in all of the `Precommit` messages the proposer received.
+The weighting is proportional to the amount of voting power, or stake, a validator has on the network.
+This mechanism for producing timestamps is both deterministic and byzantine fault tolerant.
+ 
+This current mechanism for producing timestamps has a few drawbacks.
+Validators do not have to agree at all on how close the selected block timestamp is to their own currently known Unix time.
+Additionally, any amount of voting power `>1/3` may directly control the block timestamp.
+As a result, it is quite possible that the timestamp is not particularly meaningful.
+
+These drawbacks present issues in the Tendermint protocol.
+Timestamps are used by light clients to verify blocks.
+Light clients rely on correspondence between their own currently known Unix time and the block timestamp to verify blocks they see; 
+However, their currently known Unix time may be greatly divergent from the block timestamp as a result of the limitations of `BFTTime`.
+
+The proposer-based timestamps specification suggests an alternative approach for producing block timestamps that remedies these issues.
+Proposer-based timestamps alter the current mechanism for producing block timestamps in two main ways:
+
+1. The block proposer is amended to offer up its currently known Unix time as the timestamp for the next block. 
+1. Correct validators only approve the proposed block timestamp if it is close enough to their own currently known Unix time. 
+
+The result of these changes is a more meaningful timestamp that cannot be controlled by `<= 2/3` of the validator voting power. 
+This document outlines the necessary code changes in Tendermint to implement the corresponding [proposer-based timestamps specification](https://github.com/tendermint/spec/tree/master/spec/consensus/proposer-based-timestamp).
+
+## Alternative Approaches
+
+### Remove timestamps altogether
+
+Computer clocks are bound to skew for a variety of reasons.
+Using timestamps in our protocol means either accepting the timestamps as not reliable or impacting the protocol’s liveness guarantees.
+This design requires impacting the protocol’s liveness in order to make the timestamps more reliable.
+An alternate approach is to remove timestamps altogether from the block protocol.
+`BFTTime` is deterministic but may be arbitrarily inaccurate.
+However, having a reliable source of time is quite useful for applications and protocols built on top of a blockchain.
+
+We therefore decided not to remove the timestamp. 
+Applications often wish for some transactions to occur on a certain day, on a regular period, or after some time following a different event.
+All of these require some meaningful representation of agreed upon time.
+The following protocols and application features require a reliable source of time:
+* Tendermint Light Clients [rely on correspondence between their known time](https://github.com/tendermint/spec/blob/master/spec/light-client/verification/README.md#definitions-1) and the block time for block verification.
+* Tendermint Evidence validity is determined [either in terms of heights or in terms of time](https://github.com/tendermint/spec/blob/8029cf7a0fcc89a5004e173ec065aa48ad5ba3c8/spec/consensus/evidence.md#verification).
+* Unbonding of staked assets in the Cosmos Hub [occurs after a period of 21 days](https://github.com/cosmos/governance/blob/ce75de4019b0129f6efcbb0e752cd2cc9e6136d3/params-change/Staking.md#unbondingtime).
+* IBC packets can use either a [timestamp or a height to timeout packet delivery](https://docs.cosmos.network/v0.43/ibc/overview.html#acknowledgements).
+
+Finally, inflation distribution in the Cosmos Hub uses an approximation of time to calculate an annual percentage rate. 
+This approximation of time is calculated using [block heights with an estimated number of blocks produced in a year](https://github.com/cosmos/governance/blob/master/params-change/Mint.md#blocksperyear). 
+Proposer-based timestamps will allow this inflation calculation to use a more meaningful and accurate source of time.
+
+
+## Decision
+
+Implement proposer-based timestamps and remove `BFTTime`.
+
+## Detailed Design
+
+### Overview
+
+Implementing proposer-based timestamps will require a few changes to Tendermint’s code.
+These changes will be to the following components:
+* The `internal/consensus/` package.
+* The `state/` package.
+* The `Vote`, `CommitSig`, `Commit` and `Header` types.
+* The consensus parameters.
+
+### Proposal Timestamp and Block Timestamp
+
+This design discusses two timestamps: (1) The timestamp in the block and (2) the timestamp in the proposal message.
+The existence and use of both of these timestamps can get a bit confusing, so some background is given here to clarify their uses.
+
+The [proposal message currently has a timestamp](https://github.com/tendermint/tendermint/blob/e5312942e30331e7c42b75426da2c6c9c00ae476/types/proposal.go#L31).
+This timestamp is the current Unix time known to the proposer when sending the `Proposal` message.
+This timestamp is not currently used as part of consensus.
+The changes in this ADR will begin using the proposal message timestamp as part of consensus.
+We will refer to this as the **proposal timestamp** throughout this design.
+
+The block has a timestamp field [in the header](https://github.com/tendermint/tendermint/blob/dc7c212c41a360bfe6eb38a6dd8c709bbc39aae7/types/block.go#L338).
+This timestamp is set currently as part of Tendermint’s `BFTtime` algorithm.
+It is set when a block is proposed and it is checked by the validators when they are deciding to prevote the block.
+This field will continue to be used but the logic for creating and validating this timestamp will change.
+We will refer to this as the **block timestamp** throughout this design.
+
+At a high level, the proposal timestamp from height `H` is used as the block timestamp at height `H+1`.
+The following image shows this relationship.
+The rest of this document describes the code changes that will make this possible.
+
+![](./img/pbts-message.png)
+
+### Saving the timestamp across heights
+
+Currently, `BFTtime` uses `LastCommit` to construct the block timestamp.
+The `LastCommit` is created at height `H-1` and is saved in the state store to be included in the block at height `H`.
+`BFTtime` takes the weighted median of the timestamps in `LastCommit.CommitSig` to build the timestamp for height `H`. 
+
+For proposer-based timestamps, the `LastCommit.CommitSig` timestamps will no longer be used to build the timestamps for height `H`.
+Instead, the proposal timestamp from height `H-1` will become the block timestamp for height `H`.
+To enable this, we will add a `Timestamp` field to the `Commit` struct.
+This field will be populated at each height with the proposal timestamp decided on at the previous height.
+This timestamp will also be saved with the rest of the commit in the state store [when the commit is finalized](https://github.com/tendermint/tendermint/blob/e8013281281985e3ada7819f42502b09623d24a0/internal/consensus/state.go#L1611) so that it can be recovered if Tendermint crashes.
+Changes to the `CommitSig` and `Commit` struct are detailed below. 
+
+### Changes to `CommitSig`
+
+The [CommitSig](https://github.com/tendermint/tendermint/blob/a419f4df76fe4aed668a6c74696deabb9fe73211/types/block.go#L604) struct currently contains a timestamp. 
+This timestamp is the current Unix time known to the validator when it issued a `Precommit` for the block.
+This timestamp is no longer used and will be removed in this change.
+
+`CommitSig` will be updated as follows:
+
+```diff
+type CommitSig struct {
+	BlockIDFlag      BlockIDFlag `json:"block_id_flag"`
+	ValidatorAddress Address     `json:"validator_address"`
+--	Timestamp        time.Time   `json:"timestamp"`
+	Signature        []byte      `json:"signature"`
+}
+```
+
+### Changes to `Commit`
+
+The [Commit](https://github.com/tendermint/tendermint/blob/a419f4df76fe4aed668a6c74696deabb9fe73211/types/block.go#L746) struct does not currently contain a timestamp. 
+The timestamps in the `Commit.CommitSig` entries are currently used to build the block timestamp.
+With these timestamps removed, the commit time will instead be stored in the `Commit` struct.
+
+`Commit` will be updated as follows. 
+
+```diff
+type Commit struct {
+	Height     int64       `json:"height"`
+	Round      int32       `json:"round"`
+++	Timestamp  time.Time  `json:"timestamp"` 
+	BlockID    BlockID     `json:"block_id"`
+	Signatures []CommitSig `json:"signatures"`
+}
+```
+
+### Changes to `Vote` messages
+
+`Precommit` and `Prevote` messages use a common [Vote struct](https://github.com/tendermint/tendermint/blob/a419f4df76fe4aed668a6c74696deabb9fe73211/types/vote.go#L50).
+This struct currently contains a timestamp.
+This timestamp is set using the [voteTime](https://github.com/tendermint/tendermint/blob/e8013281281985e3ada7819f42502b09623d24a0/internal/consensus/state.go#L2241) function and therefore vote times correspond to the current Unix time known to the validator.
+For precommits, this timestamp is used to construct the [CommitSig that is included in the block in the LastCommit](https://github.com/tendermint/tendermint/blob/e8013281281985e3ada7819f42502b09623d24a0/types/block.go#L754) field.
+For prevotes, this field is unused.
+Proposer-based timestamps will use the [RoundState.Proposal](https://github.com/tendermint/tendermint/blob/c3ae6f5b58e07b29c62bfdc5715b6bf8ae5ee951/internal/consensus/types/round_state.go#L76) timestamp to construct the `signedBytes` `CommitSig`.
+This timestamp is therefore no longer useful and will be dropped.
+
+`Vote` will be updated as follows:
+
+```diff
+type Vote struct {
+	Type             tmproto.SignedMsgType `json:"type"`
+	Height           int64                 `json:"height"`
+	Round            int32                 `json:"round"`    
+	BlockID          BlockID               `json:"block_id"` // zero if vote is nil.
+--	Timestamp        time.Time             `json:"timestamp"`
+	ValidatorAddress Address               `json:"validator_address"`
+	ValidatorIndex   int32                 `json:"validator_index"`
+	Signature        []byte                `json:"signature"`
+}
+```
+
+### New consensus parameters
+
+The proposer-based timestamp specification includes multiple new parameters that must be the same among all validators.
+These parameters are `PRECISION`, `MSGDELAY`, and `ACCURACY`.
+
+The `PRECISION` and `MSGDELAY` parameters are used to determine if the proposed timestamp is acceptable.
+A validator will only Prevote a proposal if the proposal timestamp is considered `timely`.
+A proposal timestamp is considered `timely` if it is within `PRECISION` and `MSGDELAY` of the Unix time known to the validator.
+More specifically, a proposal timestamp is `timely` if `validatorLocalTime - PRECISION < proposalTime < validatorLocalTime + PRECISION + MSGDELAY`. 
+
+Because the `PRECISION` and `MSGDELAY` parameters must be the same across all validators, they will be added to the [consensus parameters](https://github.com/tendermint/tendermint/blob/master/proto/tendermint/types/params.proto#L13) as [durations](https://developers.google.com/protocol-buffers/docs/reference/google.protobuf#google.protobuf.Duration).
+
+The proposer-based timestamp specification also includes a [new ACCURACY parameter](https://github.com/tendermint/spec/blob/master/spec/consensus/proposer-based-timestamp/pbts-sysmodel_001_draft.md#pbts-clocksync-external0).
+Intuitively, `ACCURACY` represents the difference between the ‘real’ time and the currently known time of correct validators.
+The currently known Unix time of any validator is always somewhat different from real time.
+`ACCURACY` is the largest such difference between each validator's time and real time taken as an absolute value. 
+This is not something a computer can determine on its own and must be specified as an estimate by community running a Tendermint-based chain.
+It is used in the new algorithm to [calculate a timeout for the propose step](https://github.com/tendermint/spec/blob/master/spec/consensus/proposer-based-timestamp/pbts-algorithm_001_draft.md#pbts-alg-startround0).
+`ACCURACY` is assumed to be the same across all validators and therefore should be included as a consensus parameter.
+
+The consensus will be updated to include this `Timestamp` field as follows:
+
+```diff
+type ConsensusParams struct {
+	Block     BlockParams     `json:"block"`
+	Evidence  EvidenceParams  `json:"evidence"`
+	Validator ValidatorParams `json:"validator"`
+	Version   VersionParams   `json:"version"`
+++	Timestamp TimestampParams `json:"timestamp"`
+}
+```
+
+```go
+type TimestampParams struct {
+	Accuracy  time.Duration `json:"accuracy"`
+	Precision time.Duration `json:"precision"`
+	MsgDelay  time.Duration `json:"msg_delay"`
+}
+```
+
+### Changes to `Header`
+
+The [Header](https://github.com/tendermint/tendermint/blob/a419f4df76fe4aed668a6c74696deabb9fe73211/types/block.go#L338) struct currently contains a timestamp.
+This timestamp is set as the `BFTtime` derived from the block's `LastCommit.CommitSig` timestamps.
+This timestamp will no longer be derived from the `LastCommit.CommitSig` timestamps and will instead be included directly into the block's `LastCommit`.
+This timestamp will therfore be identical in both the `Header` and the `LastCommit`.
+To clarify that the timestamp in the header corresponds to the `LastCommit`'s time, we will rename this timestamp field to `last_timestamp`.
+
+`Header` will be updated as follows:
+
+```diff
+type Header struct {
+	// basic block info
+	Version       version.Consensus `json:"version"`
+	ChainID       string            `json:"chain_id"`
+	Height        int64             `json:"height"`
+--	Time          time.Time         `json:"time"`
+++	LastTimestamp time.Time         `json:"last_timestamp"`
+
+	// prev block info
+	LastBlockID BlockID `json:"last_block_id"`
+
+	// hashes of block data
+	LastCommitHash tmbytes.HexBytes `json:"last_commit_hash"`
+	DataHash       tmbytes.HexBytes `json:"data_hash"`
+
+	// hashes from the app output from the prev block
+	ValidatorsHash     tmbytes.HexBytes `json:"validators_hash"`
+	NextValidatorsHash tmbytes.HexBytes `json:"next_validators_hash"`
+	ConsensusHash      tmbytes.HexBytes `json:"consensus_hash"`
+	AppHash            tmbytes.HexBytes `json:"app_hash"`
+
+	// root hash of all results from the txs from the previous block
+	LastResultsHash tmbytes.HexBytes `json:"last_results_hash"`
+
+	// consensus info
+	EvidenceHash    tmbytes.HexBytes `json:"evidence_hash"`
+	ProposerAddress Address          `json:"proposer_address"`
+}
+```
+
+### Changes to the block proposal step
+
+#### Proposer selects proposal timestamp
+
+The proposal logic already [sets the Unix time known to the validator](https://github.com/tendermint/tendermint/blob/2abfe20114ee3bb3adfee817589033529a804e4d/types/proposal.go#L44) into the `Proposal` message.
+This satisfies the proposer-based timestamp specification and does not need to change. 
+
+#### Proposer selects block timestamp
+
+The proposal timestamp that was decided in height `H-1` will be stored in the `State` struct's in the `RoundState.LastCommit` field.
+The proposer will select this timestamp to use as the block timestamp at height `H`.
+
+#### Proposer waits
+
+Block timestamps must be monotonically increasing.
+In `BFTTime`, if a validator’s clock was behind, the [validator added 1 millisecond to the previous block’s time and used that in its vote messages](https://github.com/tendermint/tendermint/blob/e8013281281985e3ada7819f42502b09623d24a0/internal/consensus/state.go#L2246).
+A goal of adding proposer-based timestamps is to enforce some degree of clock synchronization, so having a mechanism that completely ignores the Unix time of the validator time no longer works.
+
+Validator clocks will not be perfectly in sync.
+Therefore, the proposer’s current known Unix time may be less than the `LastCommit.Timestamp`.
+If the proposer’s current known Unix time is less than the `LastCommit.Timestamp`, the proposer will sleep until its known Unix time exceeds `LastCommit.Timestamp`.
+
+This change will require amending the [defaultDecideProposal](https://github.com/tendermint/tendermint/blob/822893615564cb20b002dd5cf3b42b8d364cb7d9/internal/consensus/state.go#L1180) method.
+This method should now block until the proposer’s time is greater than `LastCommit.Timestamp`.
+
+#### Changes to the propose step timeout
+
+Currently, a validator waiting for a proposal will proceed past the propose step if the configured propose timeout is reached and no proposal is seen.
+Proposer-based timestamps requires changing this timeout logic. 
+
+The proposer will now wait until its current known Unix time exceeds the `LastCommit.Timestamp` to propose a block.
+The validators must now take this and some other factors into account when deciding when to timeout the propose step.
+Specifically, the propose step timeout must also take into account potential inaccuracy in the validator’s clock and in the clock of the proposer.
+Additionally, there may be a delay communicating the proposal message from the proposer to the other validators. 
+
+Therefore, validators waiting for a proposal must wait until after the `LastCommit.Timestamp` before timing out.
+To account for possible inaccuracy in its own clock, inaccuracy in the proposer’s clock, and message delay, validators waiting for a proposal will wait until `LastCommit.Timesatmp + 2*ACCURACY + MSGDELAY`.
+ The spec defines this as `waitingTime`.
+ 
+The [propose step’s timeout is set in enterPropose](https://github.com/tendermint/tendermint/blob/822893615564cb20b002dd5cf3b42b8d364cb7d9/internal/consensus/state.go#L1108) in `state.go`. 
+`enterPropose` will be changed to calculate waiting time using the new consensus parameters.
+The timeout in `enterPropose` will then be set as the maximum of `waitingTime` and the [configured proposal step timeout](https://github.com/tendermint/tendermint/blob/dc7c212c41a360bfe6eb38a6dd8c709bbc39aae7/config/config.go#L1013).
+
+### Changes to validation rules
+
+The rules for validating that a proposal is valid will need slight modification to implement proposer-based timestamps.
+Specifically, we will change the validation logic to ensure that the proposal timestamp is `timely` and we will modify the way the block timestamp is validated as well.
+
+#### Proposal timestamp validation
+
+Adding proposal timestamp validation is a reasonably straightforward change.
+The current Unix time known to the proposer is already included in the [Proposal message](https://github.com/tendermint/tendermint/blob/dc7c212c41a360bfe6eb38a6dd8c709bbc39aae7/types/proposal.go#L31).
+Once the proposal is received, the complete message is stored in the `RoundState.Proposal` field.
+The precommit and prevote validation logic does not currently use this timestamp.
+This validation logic will be updated to check that the proposal timestamp is within `PRECISION` of the current Unix time known to the validators.
+If the timestamp is not within `PRECISION` of the current Unix time known to the validator, the proposal will not be considered it valid.
+The validator will also check that the proposal time is greater than the block timestamp from the previous height.
+
+If no valid proposal is received by the proposal timeout, the validator will prevote nil.
+This is identical to the current logic.
+
+#### Block timestamp validation
+
+The [validBlock function](https://github.com/tendermint/tendermint/blob/c3ae6f5b58e07b29c62bfdc5715b6bf8ae5ee951/state/validation.go#L14) currently [validates the proposed block timestamp in three ways](https://github.com/tendermint/tendermint/blob/c3ae6f5b58e07b29c62bfdc5715b6bf8ae5ee951/state/validation.go#L118).
+First, the validation logic checks that this timestamp is greater than the previous block’s timestamp.
+Additionally, it validates that the block timestamp is correctly calculated as the weighted median of the timestamps in the [block’s LastCommit](https://github.com/tendermint/tendermint/blob/e8013281281985e3ada7819f42502b09623d24a0/types/block.go#L48).
+Finally, the logic also authenticates the timestamps in the `LastCommit`.
+The cryptographic signature in each `CommitSig` is created by signing a hash of fields in the block with the validator’s private key.
+One of the items in this `signedBytes` hash is derived from the timestamp in the `CommitSig`.
+To authenticate the `CommitSig` timestamp, the validator builds a hash of fields that includes the timestamp and checks this hash against the provided signature. 
+This takes place in the [VerifyCommit function](https://github.com/tendermint/tendermint/blob/e8013281281985e3ada7819f42502b09623d24a0/types/validation.go#L25).
+
+The logic to validate that the block timestamp is greater than the previous block’s timestamp also works for proposer-based timestamps and will not change.
+
+`BFTTime` validation is no longer applicable and will be removed.
+Validators will no longer check that the block timestamp is a weighted median of `LastCommit` timestamps.
+This will mean removing the call to [MedianTime in the validateBlock function](https://github.com/tendermint/tendermint/blob/4db71da68e82d5cb732b235eeb2fd69d62114b45/state/validation.go#L117).
+The `MedianTime` function can be completely removed. 
+The `LastCommit` timestamps may also be removed. 
+
+The `signedBytes` validation logic in `VerifyCommit` will be slightly altered.
+The `CommitSig`s in the block’s `LastCommit` will no longer each contain a timestamp.
+The validation logic will instead include the `LastCommit.Timestamp` in the hash of fields for generating the `signedBytes`.
+The cryptographic signatures included in the `CommitSig`s will then be checked against this `signedBytes` hash to authenticate the timestamp.
+Specifically, the `VerifyCommit` function will be updated to use this new timestamp.  
+
+### Changes to the prevote step
+
+Currently, a validator will prevote a proposal in one of three cases:
+
+* Case 1:  Validator has no locked block and receives a valid proposal.
+* Case 2:  Validator has a locked block and receives a valid proposal matching its locked block.
+* Case 3:  Validator has a locked block, sees a valid proposal not matching its locked block but sees +⅔ prevotes for the new proposal’s block. 
+
+The only change we will make to the prevote step is to what a validator considers a valid proposal as detailed above.
+
+### Changes to the precommit step
+
+The precommit step will not require much modification.
+Its proposal validation rules will change in the same ways that validation will change in the prevote step.
+
+### Changes to locking a block
+When a validator receives a valid proposed block and +2/3 prevotes for that block, it stores the block as its ‘locked block’ in the [RoundState.ValidBlock](https://github.com/tendermint/tendermint/blob/e8013281281985e3ada7819f42502b09623d24a0/internal/consensus/types/round_state.go#L85) field.
+In each subsequent round it will prevote that block.
+A validator will only change which block it has locked if it sees +2/3 prevotes for a different block.
+
+This mechanism will remain largely unchanged.
+The only difference is the addition of proposal timestamp validation.
+A validator will prevote nil in a round if the proposal message it received is not `timely`.
+Prevoting nil in this case will not cause a validator to ‘unlock’ its locked block.
+This difference is an incidental result of the changes to prevote validation.
+It is included in this design for completeness and to clarify that no additional changes will be made to block locking. 
+
+### Remove voteTime Completely
+
+[voteTime](https://github.com/tendermint/tendermint/blob/822893615564cb20b002dd5cf3b42b8d364cb7d9/internal/consensus/state.go#L2229) is a mechanism for calculating the next `BFTTime` given both the validator's current known Unix time and the previous block timestamp.
+If the previous block timestamp is greater than the validator's current known Unix time, then voteTime returns a value one millisecond greater than the previous block timestamp.
+This logic is used in multiple places and is no longer needed for proposer-based timestamps.
+It should therefore be removed completely.
+
+## Future Improvements
+
+* Implement BLS signature aggregation.
+By removing fields from the `Precommit` messages, we are able to aggregate signatures.
+
+## Consequences
+
+### Positive
+
+* `<2/3` of validators can no longer influence block timestamps.
+* Block timestamp will have stronger correspondence to real time.
+* Improves the reliability of light client block verification.
+* Enables BLS signature aggregation.
+* Enables evidence handling to use time instead of height for evidence validity.
+
+### Neutral
+
+* Alters Tendermint’s liveness properties.
+Liveness now requires that all correct validators have synchronized clocks within a bound.
+Liveness will now also require that validators’ clocks move forward, which was not required under `BFTTime`.
+
+### Negative
+
+* May increase the length of the propose step if there is a large skew between the previous proposer and the current proposer’s local Unix time.
+This skew will be bound by the `PRECISION` value, so it is unlikely to be too large.
+
+* Current chains with block timestamps far in the future will either need to pause consensus until after the erroneous block timestamp or must maintain synchronized but very inaccurate clocks.
+
+## References
+
+* [PBTS Spec](https://github.com/tendermint/spec/tree/master/spec/consensus/proposer-based-timestamp)
+* [BFTTime spec](https://github.com/tendermint/spec/blob/master/spec/consensus/bft-time.md)

docs/architecture/adr-072-request-for-comments.md

@@ -0,0 +1,105 @@
+# ADR 72: Restore Requests for Comments
+
+## Changelog
+
+- 20-Aug-2021: Initial draft (@creachadair)
+
+## Status
+
+Proposed
+
+## Context
+
+In the past, we kept a collection of Request for Comments (RFC) documents in `docs/rfc`.
+Prior to the creation of the ADR process, these documents were used to document
+design and implementation decisions about Tendermint Core. The RFC directory
+was removed in favor of ADRs, in commit 3761aa69 (PR
+[\#6345](https://github.com/tendermint/tendermint/pull/6345)).
+
+For issues where an explicit design decision or implementation change is
+required, an ADR is generally preferable to an open-ended RFC: An ADR is
+relatively narrowly-focused, identifies a specific design or implementation
+question, and documents the consensus answer to that question.
+
+Some discussions are more open-ended, however, or don't require a specific
+decision to be made (yet). Such conversations are still valuable to document,
+and several members of the Tendermint team have been doing so by writing gists
+or Google docs to share them around. That works well enough in the moment, but
+gists do not support any kind of collaborative editing, and both gists and docs
+are hard to discover after the fact. Google docs have much better collaborative
+editing, but are worse for discoverability, especially when contributors span
+different Google accounts.
+
+Discoverability is important, because these kinds of open-ended discussions are
+useful to people who come later -- either as new team members or as outside
+contributors seeking to use and understand the thoughts behind our designs and
+the architectural decisions that arose from those discussion.
+
+With these in mind, I propose that:
+
+-  We re-create a new, initially empty `docs/rfc` directory in the repository,
+   and use it to capture these kinds of open-ended discussions in supplement to
+   ADRs.
+
+-  Unlike in the previous RFC scheme, documents in this new directory will
+   _not_ be used directly for decision-making. This is the key difference
+   between an RFC and an ADR.
+
+   Instead, an RFC will exist to document background, articulate general
+   principles, and serve as a historical record of discussion and motivation.
+
+   In this system, an RFC may _only_ result in a decision indirectly, via ADR
+   documents created in response to the RFC.
+
+   **In short:** If a decision is required, write an ADR; otherwise if a
+   sufficiently broad discussion is needed, write an RFC.
+
+Just so that there is a consistent format, I also propose that:
+
+-  RFC files are named `rfc-XXX-title.{md,rst,txt}` and are written in plain
+   text, Markdown, or ReStructured Text.
+
+-  Like an ADR, an RFC should include a high-level change log at the top of the
+   document, and sections for:
+
+     * Abstract: A brief, high-level synopsis of the topic.
+     * Background: Any background necessary to understand the topic.
+     * Discussion: Detailed discussion of the issue being considered.
+
+-  Unlike an ADR, an RFC does _not_ include sections for Decisions, Detailed
+   Design, or evaluation of proposed solutions. If an RFC leads to a proposal
+   for an actual architectural change, that must be recorded in an ADR in the
+   usual way, and may refer back to the RFC in its References section.
+
+## Alternative Approaches
+
+Leaving aside implementation details, the main alternative to this proposal is
+to leave things as they are now, with ADRs as the only log of record and other
+discussions being held informally in whatever medium is convenient at the time.
+
+## Decision
+
+(pending)
+
+## Detailed Design
+
+- Create a new `docs/rfc` directory in the `tendermint` repository. Note that
+  this proposal intentionally does _not_ pull back the previous contents of
+  that path from Git history, as those documents were appropriately merged into
+  the ADR process.
+
+- Create a `README.md` for RFCs that explains the rules and their relationship
+  to ADRs.
+
+- Create an `rfc-template.md` file for RFC files.
+
+## Consequences
+
+### Positive
+
+- We will have a more discoverable place to record open-ended discussions that
+  do not immediately result in a design change.
+
+### Negative
+
+- Potentially some people could be confused about the RFC/ADR distinction.

docs/nodes/configuration.md

@@ -36,7 +36,7 @@ proxy-app = "tcp://127.0.0.1:26658"
 # A custom human readable name for this node
 moniker = "anonymous"
 
-# If this node is many blocks behind the tip of the chain, FastSync
+# If this node is many blocks behind the tip of the chain, BlockSync
 # allows them to catchup quickly by downloading blocks in parallel
 # and verifying their commits
 fast-sync = true
@@ -354,12 +354,12 @@ discovery-time = "15s"
 temp-dir = ""
 
 #######################################################
-###       Fast Sync Configuration Connections       ###
+###       BlockSync Configuration Connections       ###
 #######################################################
 [fastsync]
 
-# Fast Sync version to use:
-#   1) "v0" (default) - the legacy fast sync implementation
+# Block Sync version to use:
+#   1) "v0" (default) - the legacy block sync implementation
 #   2) "v2" - complete redesign of v0, optimized for testability & readability
 version = "v0"
 

docs/rfc/README.md

@@ -0,0 +1,42 @@
+---
+order: 1
+parent:
+  order: false
+---
+
+# Requests for Comments
+
+A Request for Comments (RFC) is a record of discussion on an open-ended topic
+related to the design and implementation of Tendermint Core, for which no
+immediate decision is required.
+
+The purpose of an RFC is to serve as a historical record of a high-level
+discussion that might otherwise only be recorded in an ad hoc way (for example,
+via gists or Google docs) that are difficult to discover for someone after the
+fact. An RFC _may_ give rise to more specific architectural _decisions_ for
+Tendermint, but those decisions must be recorded separately in [Architecture
+Decision Records (ADR)](./../architecture).
+
+As a rule of thumb, if you can articulate a specific question that needs to be
+answered, write an ADR. If you need to explore the topic and get input from
+others to know what questions need to be answered, an RFC may be appropriate.
+
+## RFC Content
+
+An RFC should provide:
+
+- A **changelog**, documenting when and how the RFC has changed.
+- An **abstract**, briefly summarizing the topic so the reader can quickly tell
+  whether it is relevant to their interest.
+- Any **background** a reader will need to understand and participate in the
+  substance of the discussion (links to other documents are fine here).
+- The **discussion**, the primary content of the document.
+
+The [rfc-template.md](./rfc-template.md) file includes placeholders for these
+sections.
+
+## Table of Contents
+
+- [RFC-000: P2P Roadmap](./rfc-000-p2p-roadmap.rst)
+
+<!-- - [RFC-NNN: Title](./rfc-NNN-title.md) -->

docs/rfc/rfc-000-p2p-roadmap.rst

@@ -0,0 +1,316 @@
+====================
+RFC 000: P2P Roadmap
+====================
+
+Changelog
+---------
+
+- 2021-08-20: Completed initial draft and distributed via a gist
+- 2021-08-25: Migrated as an RFC and changed format
+
+Abstract
+--------
+
+This document discusses the future of peer network management in Tendermint, with
+a particular focus on features, semantics, and a proposed roadmap.
+Specifically, we consider libp2p as a tool kit for implementing some fundamentals.
+
+Background
+----------
+
+For the 0.35 release cycle the switching/routing layer of Tendermint was
+replaced. This work was done "in place," and produced a version of Tendermint
+that was backward-compatible and interoperable with previous versions of the
+software. While there are new p2p/peer management constructs in the new
+version (e.g. ``PeerManager`` and ``Router``), the main effect of this change
+was to simplify the ways that other components within Tendermint interacted with
+the peer management layer, and to make it possible for higher-level components
+(specifically the reactors), to be used and tested more independently.
+
+This refactoring, which was a major undertaking, was entirely necessary to
+enable areas for future development and iteration on this aspect of
+Tendermint. There are also a number of potential user-facing features that
+depend heavily on the p2p layer: additional transport protocols, transport
+compression, improved resilience to network partitions. These improvements to
+modularity, stability, and reliability of the p2p system will also make
+ongoing maintenance and feature development easier in the rest of Tendermint.
+
+Critique of Current Peer-to-Peer Infrastructure
+---------------------------------------
+
+The current (refactored) P2P stack is an improvement on the previous iteration
+(legacy), but as of 0.35, there remains room for improvement in the design and
+implementation of the P2P layer. 
+
+Some limitations of the current stack include:
+
+- heavy reliance on buffering to avoid backups in the flow of components,
+  which is fragile to maintain and can lead to unexpected memory usage
+  patterns and forces the routing layer to make decisions about when messages
+  should be discarded. 
+  
+- the current p2p stack relies on convention (rather than the compiler) to
+  enforce the API boundaries and conventions between reactors and the router,
+  making it very easy to write "wrong" reactor code or introduce a bad
+  dependency.
+
+- the current stack is probably more complex and difficult to maintain because
+  the legacy system must coexist with the new components in 0.35. When the
+  legacy stack is removed there are some simple changes that will become
+  possible and could reduce the complexity of the new system. (e.g. `#6598
+  <https://github.com/tendermint/tendermint/issues/6598>`_.)
+
+- the current stack encapsulates a lot of information about peers, and makes it
+  difficult to expose that information to monitoring/observability tools. This
+  general opacity also makes it difficult to interact with the peer system
+  from other areas of the code base (e.g. tests, reactors).
+  
+- the legacy stack provided some control to operators to force the system to
+  dial new peers or seed nodes or manipulate the topology of the system _in
+  situ_. The current stack can't easily provide this, and while the new stack
+  may have better behavior, it does leave operators hands tied.
+
+Some of these issues will be resolved early in the 0.36 cycle, with the
+removal of the legacy components.
+
+The 0.36 release also provides the opportunity to make changes to the
+protocol, as the release will not be compatible with previous releases.
+
+Areas for Development
+---------------------
+
+These sections describe features that may make sense to include in a Phase 2 of
+a P2P project.
+
+Internal Message Passing
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+Currently, there's no provision for intranode communication using the P2P
+layer, which means when two reactors need to interact with each other they
+have to have dependencies on each other's interfaces, and
+initialization. Changing these interactions (e.g. transitions between
+blocksync and consensus) from procedure calls to message passing.
+
+This is a relatively simple change and could be implemented with the following
+components:
+
+- a constant to represent "local" delivery as  the ``To``` field on
+  ``p2p.Envelope``.
+  
+- special path for routing local messages that doesn't require message
+  serialization (protobuf marshalling/unmarshaling).
+  
+Adding these semantics, particularly if in conjunction with synchronous
+semantics provides a solution to dependency graph problems currently present
+in the Tendermint codebase, which will simplify development, make it possible
+to isolate components for testing. 
+
+Eventually, this will also make it possible to have a logical Tendermint node
+running in multiple processes or in a collection of containers, although the
+usecase of this may be debatable.
+
+Synchronous Semantics (Paired Request/Response)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+In the current system, all messages are sent with fire-and-forget semantics,
+and there's no coupling between a request sent via the p2p layer, and a
+response. These kinds of semantics would simplify the implementation of
+state and block sync reactors, and make intra-node message passing more
+powerful.
+
+For some interactions, like gossiping transactions between the mempools of
+different nodes, fire-and-forget semantics make sense, but for other
+operations the missing link between requests/responses leads to either
+inefficiency when a node fails to respond or becomes unavailable, or code that
+is just difficult to follow.
+
+To support this kind of work, the protocol would need to accommodate some kind
+of request/response ID to allow identifying out-of-order responses over a
+single connection. Additionally, expanded the programming model of the
+``p2p.Channel`` to accommodate some kind of _future_ or similar paradigm to
+make it viable to write reactor code without needing for the reactor developer
+to wrestle with lower level concurency constructs.
+
+
+Timeout Handling (QoS)
+~~~~~~~~~~~~~~~~~~~~~~
+
+Currently, all timeouts, buffering, and QoS features are handled at the router
+layer, and the reactors are implemented in ways that assume/require
+asynchronous operation. This both increases the required complexity at the
+routing layer, and means that misbehavior at the reactor level is difficult to
+detect or attribute. Additionally, the current system provides three main
+parameters to control quality of service:
+
+- buffer sizes for channels and queues.
+  
+- priorities for channels
+
+- queue implementation details for shedding load.
+
+These end up being quite coarse controls, and changing the settings are
+difficult because as the queues and channels are able to buffer large numbers
+of messages it can be hard to see the impact of a given change, particularly
+in our extant test environment. In general, we should endeavor to: 
+
+- set real timeouts, via contexts, on most message send operations, so that
+  senders rather than queues can be responsible for timeout
+  logic. Additionally, this will make it possible to avoid sending messages
+  during shutdown.
+  
+- reduce (to the greatest extent possible) the amount of buffering in
+  channels and the queues, to more readily surface backpressure and reduce the
+  potential for buildup of stale messages.
+
+Stream Based Connection Handling
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Currently the transport layer is message based, which makes sense from a
+mental model of how the protocol works, but makes it more difficult to
+implement transports and connection types, as it forces a higher level view of
+the connection and interaction which makes it harder to implement for novel
+transport types and makes it more likely that message-based caching and rate
+limiting will be implemented at the transport layer rather than at a more
+appropriate level.
+
+The transport then, would be responsible for negitating the connection and the
+handshake and otherwise behave like a socket/file discriptor with ``Read` and
+``Write`` methods.
+
+While this was included in the initial design for the new P2P layer, it may be
+obviated entirely if the transport and peer layer is replaced with libp2p,
+which is primarily stream based.
+
+Service Discovery
+~~~~~~~~~~~~~~~~~
+
+In the current system, Tendermint assumes that all nodes in a network are
+largely equivelent, and nodes tend to be "chatty" making many requests of
+large numbers of peers and waiting for peers to (hopefully) respond. While
+this works and has allowed Tendermint to get to a certain point, this both
+produces a theoretical scaling bottle neck and makes it harder to test and
+verify components of the system.
+
+In addition to peer's identity and connection information, peers should be
+able to advertise a number of services or capabilities, and node operators or
+developers should be able to specify peer capability requirements (e.g. target
+at least <x>-percent of peers with <y> capability.)  
+
+These capabilities may be useful in selecting peers to send messages to, it
+may make sense to extend Tendermint's message addressing capability to allow
+reactors to send messages to groups of peers based on role rather than only
+allowing addressing to one or all peers.
+
+Having a good service discovery mechanism may pair well with the synchronous
+semantics (request/response) work, as it allows reactors to "make a request of
+a peer with <x> capability and wait for the response," rather force the
+reactors to need to track the capabilities or state of specific peers.
+
+Solutions
+---------
+
+Continued Homegrown Implementation
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The current peer system is homegrown and is conceptually compatible with the
+needs of the project, and while there are limitations to the system, the p2p
+layer is not (currently as of 0.35) a major source of bugs or friction during
+development. 
+
+However, the current implementation makes a number of allowances for
+interoperability, and there are a collection of iterative improvements that
+should be considered in the next couple of releases. To maintain the current
+implementation, upcoming work would include:
+
+- change the ``Transport`` mechanism to facilitate easier implementations.
+
+- implement different ``Transport`` handlers to be able to manage peer
+  connections using different protocols (e.g. QUIC, etc.)
+
+- entirely remove the constructs and implementations of the legacy peer
+  implementation. 
+  
+- establish and enforce clearer chains of responsibility for connection
+  establishment (e.g. handshaking, setup,) which is currently shared between
+  three components. 
+
+- report better metrics regarding the into the state of peers and network
+  connectivity, which are opaque outside of the system. This is constrained at
+  the moment as a side effect of the split responsibility for connection
+  establishment.
+  
+- extend the PEX system to include service information so that ndoes in the
+  network weren't necessarily homogeneous.
+
+While maintaining a bespoke peer management layer would seem to distract from
+development of core functionality, the truth is that (once the legacy code is
+removed,) the scope of the peer layer is relatively small from a maintenance
+perspective, and having control at this layer might actually afford the
+project with the ability to more rapidly iterate on some features.
+
+LibP2P
+~~~~~~
+
+LibP2P provides components that, approximately, account for the
+``PeerManager`` and ``Transport`` components of the current (new) P2P
+stack. The Go APIs seem reasonable, and being able to externalize the
+implementation details of peer and connection management seems like it could
+provide a lot of benefits, particularly in supporting a more active ecosystem.
+
+In general the API provides the kind of stream-based, multi-protocol
+supporting, and idiomatic baseline for implementing a peer layer. Additionally
+because it handles peer exchange and connection management at a lower
+level, by using libp2p it'd be possible to remove a good deal of code in favor
+of just using libp2p. Having said that, Tendermint's P2P layer covers a
+greater scope (e.g. message routing to different peers) and that layer is
+something that Tendermint might want to retain.
+
+The are a number of unknowns that require more research including how much of
+a peer database the Tendermint engine itself needs to maintain, in order to
+support higher level operations (consensus, statesync), but it might be the
+case that our internal systems need to know much less about peers than
+otherwise specified. Similarly, the current system has a notion of peer
+scoring that cannot be communicated to libp2p, which may be fine as this is
+only used to support peer exchange (PEX,) which would become a property libp2p
+and not expressed in it's current higher-level form. 
+
+In general, the effort to switch to libp2p would involve: 
+
+- timing it during an appropriate protocol-breaking window, as it doesn't seem
+  viable to support both libp2p *and* the current p2p protocol. 
+  
+- providing some in-memory testing network to support the use case that the
+  current ``p2p.MemoryNetwork`` provides.
+
+- re-homing the ``p2p.Router`` implementation on top of libp2p components to
+  be able to maintain the current reactor implementations.
+  
+Open question include: 
+
+- how much local buffering should we be doing? It sort of seems like we should
+  figure out what the expected behavior is for libp2p for QoS-type
+  functionality, and if our requirements mean that we should be implementing
+  this on top of things ourselves?
+
+- if Tendermint was going to use libp2p, how would libp2p's stability
+  guarantees (protocol, etc.) impact/constrain Tendermint's stability
+  guarantees?
+
+- what kind of introspection does libp2p provide, and to what extend would
+  this change or constrain the kind of observability that Tendermint is able
+  to provide?
+
+- how do efforts to select "the best" (healthy, close, well-behaving, etc.)
+  peers work out if Tendermint is not maintaining a local peer database?
+  
+- would adding additional higher level semantics (internal message passing,
+  request/response pairs, service discovery, etc.) facilitate removing some of
+  the direct linkages between constructs/components in the system and reduce
+  the need for Tendermint nodes to maintain state about its peers?
+
+References
+----------
+
+- `Tracking Ticket for P2P Refactor Project <https://github.com/tendermint/tendermint/issues/5670>`_ 
+- `ADR 61: P2P Refactor Scope <../architecture/adr-061-p2p-refactor-scope.md>`_
+- `ADR 62: P2P Architecture and Abstraction <../architecture/adr-061-p2p-architecture.md>`_

docs/rfc/rfc-template.md

@@ -0,0 +1,35 @@
+# RFC {RFC-NUMBER}: {TITLE}
+
+## Changelog
+
+- {date}: {changelog}
+
+## Abstract
+
+> A brief high-level synopsis of the topic of discussion for this RFC, ideally
+> just a few sentences.  This should help the reader quickly decide whether the
+> rest of the discussion is relevant to their interest.
+
+## Background
+
+> Any context or orientation needed for a reader to understand and participate
+> in the substance of the Discussion. If necessary, this section may include
+> links to other documentation or sources rather than restating existing
+> material, but should provide enough detail that the reader can tell what they
+> need to read to be up-to-date.
+
+### References
+
+> Links to external materials needed to follow the discussion may be added here.
+>
+> In addition, if the discussion in a request for comments leads to any design
+> decisions, it may be helpful to add links to the ADR documents here after the
+> discussion has settled.
+
+## Discussion
+
+> This section contains the core of the discussion.
+>
+> There is no fixed format for this section, but ideally changes to this
+> section should be updated before merging to reflect any discussion that took
+> place on the PR that made those changes.

docs/tendermint-core/README.md

@@ -14,7 +14,7 @@ This section dives into the internals of Go-Tendermint.
 - [Subscribing to events](./subscription.md)
 - [Block Structure](./block-structure.md)
 - [RPC](./rpc.md)
-- [Fast Sync](./fast-sync.md)
+- [Block Sync](./block-sync.md)
 - [State Sync](./state-sync.md)
 - [Mempool](./mempool.md)
 - [Light Client](./light-client.md)

docs/tendermint-core/block-sync.md

@@ -2,7 +2,8 @@
 order: 10
 ---
 
-# Fast Sync
+# Block Sync
+*Formerly known as Fast Sync*
 
 In a proof of work blockchain, syncing with the chain is the same
 process as staying up-to-date with the consensus: download blocks, and
@@ -14,7 +15,7 @@ scratch can take a very long time. It's much faster to just download
 blocks and check the merkle tree of validators than to run the real-time
 consensus gossip protocol.
 
-## Using Fast Sync
+## Using Block Sync
 
 To support faster syncing, Tendermint offers a `fast-sync` mode, which
 is enabled by default, and can be toggled in the `config.toml` or via
@@ -22,36 +23,36 @@ is enabled by default, and can be toggled in the `config.toml` or via
 
 In this mode, the Tendermint daemon will sync hundreds of times faster
 than if it used the real-time consensus process. Once caught up, the
-daemon will switch out of fast sync and into the normal consensus mode.
+daemon will switch out of Block Sync and into the normal consensus mode.
 After running for some time, the node is considered `caught up` if it
 has at least one peer and it's height is at least as high as the max
 reported peer height. See [the IsCaughtUp
 method](https://github.com/tendermint/tendermint/blob/b467515719e686e4678e6da4e102f32a491b85a0/blockchain/pool.go#L128).
 
-Note: There are three versions of fast sync. We recommend using v0 as v2 is still in beta.
+Note: There are two versions of Block Sync. We recommend using v0 as v2 is still in beta.
   If you would like to use a different version you can do so by changing the version in the `config.toml`:
 
 ```toml
 #######################################################
-###       Fast Sync Configuration Connections       ###
+###       Block Sync Configuration Connections       ###
 #######################################################
 [fastsync]
 
-# Fast Sync version to use:
-#   1) "v0" (default) - the legacy fast sync implementation
+# Block Sync version to use:
+#   1) "v0" (default) - the legacy Block Sync implementation
 #   2) "v2" - complete redesign of v0, optimized for testability & readability
 version = "v0"
 ```
 
-If we're lagging sufficiently, we should go back to fast syncing, but
+If we're lagging sufficiently, we should go back to block syncing, but
 this is an [open issue](https://github.com/tendermint/tendermint/issues/129).
 
-## The Fast Sync event
-When the tendermint blockchain core launches, it might switch to the `fast-sync`
+## The Block Sync event
+When the tendermint blockchain core launches, it might switch to the `block-sync`
 mode to catch up the states to the current network best height. the core will emits
 a fast-sync event to expose the current status and the sync height. Once it catched
 the network best height, it will switches to the state sync mechanism and then emit
 another event for exposing the fast-sync `complete` status and the state `height`.
 
-The user can query the events by subscribing `EventQueryFastSyncStatus`
+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.

docs/tendermint-core/state-sync.md

@@ -4,7 +4,7 @@ order: 11
 
 # State Sync
 
-With fast sync a node is downloading all of the data of an application from genesis and verifying it. 
+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. 
 

docs/tools/debugging/README.md

@@ -62,3 +62,30 @@ given destination directory. Each archive will contain:
 
 Note: goroutine.out and heap.out will only be written if a profile address is
 provided and is operational. This command is blocking and will log any error.
+
+## Tendermint Inspect
+
+Tendermint includes an `inspect` command for querying Tendermint's state store and block
+store over Tendermint RPC.
+
+When the Tendermint consensus engine detects inconsistent state, it will crash the
+entire Tendermint process. 
+While in this inconsistent state, a node running Tendermint's consensus engine will not start up. 
+The `inspect` command runs only a subset of Tendermint's RPC endpoints for querying the block store
+and state store. 
+`inspect` allows operators to query a read-only view of the stage.
+`inspect` does not run the consensus engine at all and can therefore be used to debug
+processes that have crashed due to inconsistent state. 
+
+
+To start the `inspect` process, run
+```bash
+tendermint inspect
+```
+
+### RPC endpoints
+The list of available RPC endpoints can be found by making a request to the RPC port.
+For an `inspect` process running on `127.0.0.1:26657`, navigate your browser to 
+`http://127.0.0.1:26657/` to retrieve the list of enabled RPC endpoints.
+
+Additional information on the Tendermint RPC endpoints can be found in the [rpc documentation](https://docs.tendermint.com/master/rpc).

docs/tools/debugging/pro.md

@@ -64,13 +64,42 @@ It won’t kill the node, but it will gather all of the above data and package i
 
 At this point, depending on how severe the degradation is, you may want to restart the process.
 
+## Tendermint Inspect
+
+What if the Tendermint node will not start up due to inconsistent consensus state? 
+
+When a node running the Tendermint consensus engine detects an inconsistent state 
+it will crash the entire Tendermint process. 
+The Tendermint consensus engine cannot be run in this inconsistent state and the so node
+will fail to start up as a result.
+The Tendermint RPC server can provide valuable information for debugging in this situation.
+The Tendermint `inspect` command will run a subset of the Tendermint RPC server 
+that is useful for debugging inconsistent state.
+
+### Running inspect
+
+Start up the `inspect` tool on the machine where Tendermint crashed using: 
+```bash
+tendermint inspect --home=</path/to/app.d>
+```
+
+`inspect` will use the data directory specified in your Tendermint configuration file.
+`inspect` will also run the RPC server at the address specified in your Tendermint configuration file.
+
+### Using inspect
+
+With the `inspect` server running, you can access RPC endpoints that are critically important
+for debugging.
+Calling the `/status`, `/consensus_state` and `/dump_consensus_state` RPC endpoint 
+will return useful information about the Tendermint consensus state.
+
 ## Outro
 
-We’re hoping that the `tendermint debug` subcommand will become de facto the first response to any accidents.
+We’re hoping that these Tendermint tools will become de facto the first response for any accidents.
 
-Let us know what your experience has been so far! Have you had a chance to try `tendermint debug` yet?
+Let us know what your experience has been so far! Have you had a chance to try `tendermint debug` or `tendermint inspect` yet?
 
-Join our chat, where we discuss the current issues and future improvements.
+Join our [discord chat](https://discord.gg/vcExX9T), where we discuss the current issues and future improvements.
 
 —
 

docs/tutorials/go-built-in.md

@@ -388,7 +388,6 @@ func main() {
  c := make(chan os.Signal, 1)
  signal.Notify(c, os.Interrupt, syscall.SIGTERM)
  <-c
- os.Exit(0)
 }
 
 func newTendermint(app abci.Application, configFile string) (*nm.Node, error) {
@@ -564,7 +563,6 @@ defer func() {
 c := make(chan os.Signal, 1)
 signal.Notify(c, os.Interrupt, syscall.SIGTERM)
 <-c
-os.Exit(0)
 ```
 
 ## 1.5 Getting Up and Running

go.mod

@@ -3,7 +3,7 @@ module github.com/tendermint/tendermint
 go 1.16
 
 require (
-	github.com/BurntSushi/toml v0.3.1
+	github.com/BurntSushi/toml v0.4.1
 	github.com/Masterminds/squirrel v1.5.0
 	github.com/Workiva/go-datastructures v1.0.53
 	github.com/adlio/schema v1.1.13
@@ -13,7 +13,7 @@ require (
 	github.com/go-kit/kit v0.11.0
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/protobuf v1.5.2
-	github.com/golangci/golangci-lint v1.41.1
+	github.com/golangci/golangci-lint v1.42.0
 	github.com/google/orderedcode v0.0.1
 	github.com/google/uuid v1.3.0
 	github.com/gorilla/websocket v1.4.2
@@ -22,20 +22,24 @@ require (
 	github.com/lib/pq v1.10.2
 	github.com/libp2p/go-buffer-pool v0.0.2
 	github.com/minio/highwayhash v1.0.2
+	github.com/mroth/weightedrand v0.4.1
 	github.com/oasisprotocol/curve25519-voi v0.0.0-20210609091139-0a56a4bca00b
 	github.com/ory/dockertest v3.3.5+incompatible
 	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 v1.23.0
+	github.com/rs/zerolog v1.24.0
 	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 v1.8.1
 	github.com/stretchr/testify v1.7.0
 	github.com/tendermint/tm-db v0.6.4
-	golang.org/x/crypto v0.0.0-20210314154223-e6e6c4f2bb5b
-	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4
-	google.golang.org/grpc v1.39.0
+	github.com/vektra/mockery/v2 v2.9.0
+	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
+	golang.org/x/net v0.0.0-20210428140749-89ef3d95e781
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
+	google.golang.org/grpc v1.40.0
 	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
+	pgregory.net/rapid v0.4.7
 )

go.sum

@@ -44,10 +44,13 @@ 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 v0.1.3 h1:qKV8gSzPzBqrG/q0dgraZXJCymWt6KuD9+Y7K7xtzN8=
+github.com/Antonboom/errname v0.1.3/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/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 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/DataDog/zstd v1.4.1 h1:3oxKN3wbHibqx897utPC2LTQU4J+IHWWJO+glkAkpFM=
 github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
@@ -72,7 +75,7 @@ github.com/OpenPeeDeeP/depguard v1.0.1 h1:VlW4R6jmBIv3/u1JNlawEvJMM4J+dPORPaZasQ
 github.com/OpenPeeDeeP/depguard v1.0.1/go.mod h1:xsIw86fROiiwelg+jB2uM9PiKihMMmUx/1V+TNhjQvM=
 github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWXgklEdEo=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
-github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/StackExchange/wmi v1.2.1/go.mod h1:rcmrprowKIVzvc+NUiLncP2uuArMWLCbu9SBzvHz7e8=
 github.com/VividCortex/gohistogram v1.0.0 h1:6+hBz+qvs0JOrrNhhmR7lFxo5sINxBCGXrdtl/UvroE=
 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=
@@ -175,8 +178,8 @@ github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:ma
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/daixiang0/gci v0.2.8 h1:1mrIGMBQsBu0P7j7m1M8Lb+ZeZxsZL+jyGX4YoMJJpg=
-github.com/daixiang0/gci v0.2.8/go.mod h1:+4dZ7TISfSmqfAGv59ePaHfNzgGtIkHAhhdKggP1JAc=
+github.com/daixiang0/gci v0.2.9 h1:iwJvwQpBZmMg31w+QQ6jsyZ54KEATn6/nfARbBNW294=
+github.com/daixiang0/gci v0.2.9/go.mod h1:+4dZ7TISfSmqfAGv59ePaHfNzgGtIkHAhhdKggP1JAc=
 github.com/davecgh/go-spew v0.0.0-20161028175848-04cdfd42973b/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -256,7 +259,7 @@ github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vb
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
-github.com/go-ole/go-ole v1.2.4/go.mod h1:XCwSNxSkXRo4vlyPy93sltvi/qJq0jqQhjqQNIwKuxM=
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@@ -288,8 +291,8 @@ github.com/go-zookeeper/zk v1.0.2/go.mod h1:nOB03cncLtlp4t+UAkGSV+9beXP/akpekBwL
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@@ -340,8 +343,8 @@ github.com/golangci/go-misc v0.0.0-20180628070357-927a3d87b613 h1:9kfjN3AdxcbsZB
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@@ -393,6 +396,7 @@ github.com/google/uuid v0.0.0-20161128191214-064e2069ce9c/go.mod h1:TIyPZe4Mgqvf
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@@ -408,6 +412,7 @@ github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51
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@@ -547,8 +552,8 @@ github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 h1:SOEGU9fKiNWd/HOJuq
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@@ -596,8 +601,8 @@ github.com/mbilski/exhaustivestruct v1.2.0 h1:wCBmUnSYufAHO6J4AVWY6ff+oxWxsVFrwg
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@@ -630,7 +635,9 @@ github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwd
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@@ -648,8 +655,8 @@ github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354 h1:4kuARK6Y6Fx
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@@ -669,14 +676,15 @@ github.com/onsi/ginkgo v1.7.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+W
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@@ -762,12 +770,14 @@ github.com/rs/cors v1.7.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
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@@ -776,12 +786,12 @@ github.com/sanposhiho/wastedassign/v2 v2.0.6/go.mod h1:KyZ0MWTwxxBmfwn33zh3k1dms
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@@ -815,7 +825,7 @@ github.com/spf13/cast v1.3.1 h1:nFm6S0SMdyzrzcmThSipiEubIDy8WEXKNZ0UOgiRpng=
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@@ -826,6 +836,7 @@ github.com/spf13/pflag v1.0.3/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnIn
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@@ -857,22 +868,23 @@ github.com/tecbot/gorocksdb v0.0.0-20191217155057-f0fad39f321c h1:g+WoO5jjkqGAzH
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@@ -882,12 +894,14 @@ github.com/ultraware/whitespace v0.0.4 h1:If7Va4cM03mpgrNH9k49/VOicWpGoG70XPBFFO
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@@ -902,6 +916,7 @@ github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
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@@ -949,8 +964,9 @@ golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPh
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@@ -1002,6 +1018,7 @@ golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn
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@@ -1031,13 +1048,13 @@ golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81R
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@@ -1061,6 +1078,7 @@ golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJ
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 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -1085,6 +1103,7 @@ golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190826190057-c7b8b68b1456/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190922100055-0a153f010e69/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -1124,17 +1143,19 @@ golang.org/x/sys v0.0.0-20210104204734-6f8348627aad/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210217105451-b926d437f341/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210220050731-9a76102bfb43/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210315160823-c6e025ad8005/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 h1:JWgyZ1qgdTaF3N3oxC+MdTV7qvEEgHo3otj+HB5CM7Q=
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/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=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -1142,8 +1163,9 @@ golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
 golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -1171,6 +1193,7 @@ golang.org/x/tools v0.0.0-20190606124116-d0a3d012864b/go.mod h1:/rFqwRUd4F7ZHNgw
 golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 golang.org/x/tools v0.0.0-20190628153133-6cdbf07be9d0/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
 golang.org/x/tools v0.0.0-20190816200558-6889da9d5479/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20190828213141-aed303cbaa74/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190907020128-2ca718005c18/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190910044552-dd2b5c81c578/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -1200,6 +1223,7 @@ golang.org/x/tools v0.0.0-20200224181240-023911ca70b2/go.mod h1:TB2adYChydJhpapK
 golang.org/x/tools v0.0.0-20200227222343-706bc42d1f0d/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200304193943-95d2e580d8eb/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
 golang.org/x/tools v0.0.0-20200312045724-11d5b4c81c7d/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
+golang.org/x/tools v0.0.0-20200323144430-8dcfad9e016e/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
 golang.org/x/tools v0.0.0-20200324003944-a576cf524670/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
 golang.org/x/tools v0.0.0-20200329025819-fd4102a86c65/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
 golang.org/x/tools v0.0.0-20200331025713-a30bf2db82d4/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8=
@@ -1227,7 +1251,6 @@ golang.org/x/tools v0.0.0-20200831203904-5a2aa26beb65/go.mod h1:Cj7w3i3Rnn0Xh82u
 golang.org/x/tools v0.0.0-20200904185747-39188db58858/go.mod h1:Cj7w3i3Rnn0Xh82ur9kSqwfTHTeVxaDqrfMjpcNT6bE=
 golang.org/x/tools v0.0.0-20201001104356-43ebab892c4c/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/tools v0.0.0-20201002184944-ecd9fd270d5d/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
-golang.org/x/tools v0.0.0-20201011145850-ed2f50202694/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/tools v0.0.0-20201022035929-9cf592e881e9/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201023174141-c8cfbd0f21e6/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20201028025901-8cd080b735b3/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
@@ -1244,8 +1267,10 @@ golang.org/x/tools v0.0.0-20210105154028-b0ab187a4818/go.mod h1:emZCQorbCU4vsT4f
 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 v0.1.2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.3 h1:L69ShwSZEyCsLKoAxDKeMvLDZkumEe8gXUZAjab0tX8=
 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/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=
@@ -1333,6 +1358,7 @@ google.golang.org/genproto v0.0.0-20210602131652-f16073e35f0c/go.mod h1:UODoCrxH
 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=
+google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
@@ -1354,8 +1380,8 @@ google.golang.org/grpc v1.35.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAG
 google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/grpc v1.36.1/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
 google.golang.org/grpc v1.38.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
-google.golang.org/grpc v1.39.0 h1:Klz8I9kdtkIN6EpHHUOMLCYhTn/2WAe5a0s1hcBkdTI=
-google.golang.org/grpc v1.39.0/go.mod h1:PImNr+rS9TWYb2O4/emRugxiyHZ5JyHW5F+RPnDzfrE=
+google.golang.org/grpc v1.40.0 h1:AGJ0Ih4mHjSeibYkFGh1dD9KJ/eOtZ93I6hoHhukQ5Q=
+google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 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=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -1414,8 +1440,8 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-honnef.co/go/tools v0.2.0 h1:ws8AfbgTX3oIczLPNPCu5166oBg9ST2vNs0rcht+mDE=
-honnef.co/go/tools v0.2.0/go.mod h1:lPVVZ2BS5TfnjLyizF7o7hv7j9/L+8cZY2hLyjP9cGY=
+honnef.co/go/tools v0.2.1 h1:/EPr//+UMMXwMTkXvCCoaJDq8cpjMO80Ou+L4PDo2mY=
+honnef.co/go/tools v0.2.1/go.mod h1:lPVVZ2BS5TfnjLyizF7o7hv7j9/L+8cZY2hLyjP9cGY=
 mvdan.cc/gofumpt v0.1.1 h1:bi/1aS/5W00E2ny5q65w9SnKpWEF/UIOqDYBILpo9rA=
 mvdan.cc/gofumpt v0.1.1/go.mod h1:yXG1r1WqZVKWbVRtBWKWX9+CxGYfA51nSomhM0woR48=
 mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed h1:WX1yoOaKQfddO/mLzdV4wptyWgoH/6hwLs7QHTixo0I=
@@ -1424,6 +1450,8 @@ mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b h1:DxJ5nJdkhDlLok9K6qO+5290kphD
 mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
 mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7 h1:HT3e4Krq+IE44tiN36RvVEb6tvqeIdtsVSsxmNPqlFU=
 mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7/go.mod h1:hBpJkZE8H/sb+VRFvw2+rBpHNsTBcvSpk61hr8mzXZE=
+pgregory.net/rapid v0.4.7 h1:MTNRktPuv5FNqOO151TM9mDTa+XHcX6ypYeISDVD14g=
+pgregory.net/rapid v0.4.7/go.mod h1:UYpPVyjFHzYBGHIxLFoupi8vwk6rXNzRY9OMvVxFIOU=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

inspect/doc.go

@@ -0,0 +1,36 @@
+/*
+Package inspect provides a tool for investigating the state of a
+failed Tendermint node.
+
+This package provides the Inspector type. The Inspector type runs a subset of the Tendermint
+RPC endpoints that are useful for debugging issues with Tendermint consensus.
+
+When a node running the Tendermint consensus engine detects an inconsistent consensus state,
+the entire node will crash. The Tendermint consensus engine cannot run in this
+inconsistent state so the node will not be able to start up again.
+
+The RPC endpoints provided by the Inspector type allow for a node operator to inspect
+the block store and state store to better understand what may have caused the inconsistent state.
+
+
+The Inspector type's lifecycle is controlled by a context.Context
+  ins := inspect.NewFromConfig(rpcConfig)
+  ctx, cancelFunc:= context.WithCancel(context.Background())
+
+  // Run blocks until the Inspector server is shut down.
+  go ins.Run(ctx)
+  ...
+
+  // calling the cancel function will stop the running inspect server
+  cancelFunc()
+
+Inspector serves its RPC endpoints on the address configured in the RPC configuration
+
+  rpcConfig.ListenAddress = "tcp://127.0.0.1:26657"
+  ins := inspect.NewFromConfig(rpcConfig)
+  go ins.Run(ctx)
+
+The list of available RPC endpoints can then be viewed by navigating to
+http://127.0.0.1:26657/ in the web browser.
+*/
+package inspect

inspect/inspect.go

@@ -0,0 +1,149 @@
+package inspect
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+
+	"github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/inspect/rpc"
+	"github.com/tendermint/tendermint/libs/log"
+	tmstrings "github.com/tendermint/tendermint/libs/strings"
+	rpccore "github.com/tendermint/tendermint/rpc/core"
+	"github.com/tendermint/tendermint/state"
+	"github.com/tendermint/tendermint/state/indexer"
+	"github.com/tendermint/tendermint/state/indexer/sink"
+	"github.com/tendermint/tendermint/store"
+	"github.com/tendermint/tendermint/types"
+
+	"golang.org/x/sync/errgroup"
+)
+
+// Inspector manages an RPC service that exports methods to debug a failed node.
+// After a node shuts down due to a consensus failure, it will no longer start
+// up its state cannot easily be inspected. An Inspector value provides a similar interface
+// to the node, using the underlying Tendermint data stores, without bringing up
+// any other components. A caller can query the Inspector service to inspect the
+// persisted state and debug the failure.
+type Inspector struct {
+	routes rpccore.RoutesMap
+
+	config *config.RPCConfig
+
+	indexerService *indexer.Service
+	eventBus       *types.EventBus
+	logger         log.Logger
+}
+
+// New returns an Inspector that serves RPC on the specified BlockStore and StateStore.
+// 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"))
+	return &Inspector{
+		routes:         routes,
+		config:         cfg,
+		logger:         logger,
+		eventBus:       eb,
+		indexerService: is,
+	}
+}
+
+// NewFromConfig constructs an Inspector using the values defined in the passed in config.
+func NewFromConfig(cfg *config.Config) (*Inspector, error) {
+	bsDB, err := config.DefaultDBProvider(&config.DBContext{ID: "blockstore", Config: cfg})
+	if err != nil {
+		return nil, err
+	}
+	bs := store.NewBlockStore(bsDB)
+	sDB, err := config.DefaultDBProvider(&config.DBContext{ID: "state", Config: cfg})
+	if err != nil {
+		return nil, err
+	}
+	genDoc, err := types.GenesisDocFromFile(cfg.GenesisFile())
+	if err != nil {
+		return nil, err
+	}
+	sinks, err := sink.EventSinksFromConfig(cfg, config.DefaultDBProvider, genDoc.ChainID)
+	if err != nil {
+		return nil, err
+	}
+	logger := log.MustNewDefaultLogger(log.LogFormatPlain, log.LogLevelInfo, false)
+	ss := state.NewStore(sDB)
+	return New(cfg.RPC, bs, ss, sinks, logger), nil
+}
+
+// Run starts the Inspector servers and blocks until the servers shut down. The passed
+// in context is used to control the lifecycle of the servers.
+func (ins *Inspector) Run(ctx context.Context) error {
+	err := ins.eventBus.Start()
+	if err != nil {
+		return fmt.Errorf("error starting event bus: %s", err)
+	}
+	defer func() {
+		err := ins.eventBus.Stop()
+		if err != nil {
+			ins.logger.Error("event bus stopped with error", "err", err)
+		}
+	}()
+	err = ins.indexerService.Start()
+	if err != nil {
+		return fmt.Errorf("error starting indexer service: %s", err)
+	}
+	defer func() {
+		err := ins.indexerService.Stop()
+		if err != nil {
+			ins.logger.Error("indexer service stopped with error", "err", err)
+		}
+	}()
+	return startRPCServers(ctx, ins.config, ins.logger, ins.routes)
+}
+
+func startRPCServers(ctx context.Context, cfg *config.RPCConfig, logger log.Logger, routes rpccore.RoutesMap) error {
+	g, tctx := errgroup.WithContext(ctx)
+	listenAddrs := tmstrings.SplitAndTrimEmpty(cfg.ListenAddress, ",", " ")
+	rh := rpc.Handler(cfg, routes, logger)
+	for _, listenerAddr := range listenAddrs {
+		server := rpc.Server{
+			Logger:  logger,
+			Config:  cfg,
+			Handler: rh,
+			Addr:    listenerAddr,
+		}
+		if cfg.IsTLSEnabled() {
+			keyFile := cfg.KeyFile()
+			certFile := cfg.CertFile()
+			listenerAddr := listenerAddr
+			g.Go(func() error {
+				logger.Info("RPC HTTPS server starting", "address", listenerAddr,
+					"certfile", certFile, "keyfile", keyFile)
+				err := server.ListenAndServeTLS(tctx, certFile, keyFile)
+				if !errors.Is(err, net.ErrClosed) {
+					return err
+				}
+				logger.Info("RPC HTTPS server stopped", "address", listenerAddr)
+				return nil
+			})
+		} else {
+			listenerAddr := listenerAddr
+			g.Go(func() error {
+				logger.Info("RPC HTTP server starting", "address", listenerAddr)
+				err := server.ListenAndServe(tctx)
+				if !errors.Is(err, net.ErrClosed) {
+					return err
+				}
+				logger.Info("RPC HTTP server stopped", "address", listenerAddr)
+				return nil
+			})
+		}
+	}
+	return g.Wait()
+}

inspect/inspect_test.go

@@ -0,0 +1,583 @@
+package inspect_test
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"os"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/fortytw2/leaktest"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
+	abcitypes "github.com/tendermint/tendermint/abci/types"
+	"github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/inspect"
+	"github.com/tendermint/tendermint/libs/log"
+	"github.com/tendermint/tendermint/libs/pubsub/query"
+	"github.com/tendermint/tendermint/proto/tendermint/state"
+	httpclient "github.com/tendermint/tendermint/rpc/client/http"
+	"github.com/tendermint/tendermint/state/indexer"
+	indexermocks "github.com/tendermint/tendermint/state/indexer/mocks"
+	statemocks "github.com/tendermint/tendermint/state/mocks"
+	"github.com/tendermint/tendermint/types"
+)
+
+func TestInspectConstructor(t *testing.T) {
+	cfg := config.ResetTestRoot("test")
+	t.Cleanup(leaktest.Check(t))
+	defer func() { _ = os.RemoveAll(cfg.RootDir) }()
+	t.Run("from config", func(t *testing.T) {
+		d, err := inspect.NewFromConfig(cfg)
+		require.NoError(t, err)
+		require.NotNil(t, d)
+	})
+
+}
+
+func TestInspectRun(t *testing.T) {
+	cfg := config.ResetTestRoot("test")
+	t.Cleanup(leaktest.Check(t))
+	defer func() { _ = os.RemoveAll(cfg.RootDir) }()
+	t.Run("from config", func(t *testing.T) {
+		d, err := inspect.NewFromConfig(cfg)
+		require.NoError(t, err)
+		ctx, cancel := context.WithCancel(context.Background())
+		stoppedWG := &sync.WaitGroup{}
+		stoppedWG.Add(1)
+		go func() {
+			require.NoError(t, d.Run(ctx))
+			stoppedWG.Done()
+		}()
+		cancel()
+		stoppedWG.Wait()
+	})
+
+}
+
+func TestBlock(t *testing.T) {
+	testHeight := int64(1)
+	testBlock := new(types.Block)
+	testBlock.Header.Height = testHeight
+	testBlock.Header.LastCommitHash = []byte("test hash")
+	stateStoreMock := &statemocks.Store{}
+
+	blockStoreMock := &statemocks.BlockStore{}
+	blockStoreMock.On("Height").Return(testHeight)
+	blockStoreMock.On("Base").Return(int64(0))
+	blockStoreMock.On("LoadBlockMeta", testHeight).Return(&types.BlockMeta{})
+	blockStoreMock.On("LoadBlock", testHeight).Return(testBlock)
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+	resultBlock, err := cli.Block(context.Background(), &testHeight)
+	require.NoError(t, err)
+	require.Equal(t, testBlock.Height, resultBlock.Block.Height)
+	require.Equal(t, testBlock.LastCommitHash, resultBlock.Block.LastCommitHash)
+	cancel()
+	wg.Wait()
+
+	blockStoreMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+}
+
+func TestTxSearch(t *testing.T) {
+	testHash := []byte("test")
+	testTx := []byte("tx")
+	testQuery := fmt.Sprintf("tx.hash='%s'", string(testHash))
+	testTxResult := &abcitypes.TxResult{
+		Height: 1,
+		Index:  100,
+		Tx:     testTx,
+	}
+
+	stateStoreMock := &statemocks.Store{}
+	blockStoreMock := &statemocks.BlockStore{}
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	eventSinkMock.On("Type").Return(indexer.KV)
+	eventSinkMock.On("SearchTxEvents", mock.Anything,
+		mock.MatchedBy(func(q *query.Query) bool { return testQuery == q.String() })).
+		Return([]*abcitypes.TxResult{testTxResult}, nil)
+
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+
+	var page = 1
+	resultTxSearch, err := cli.TxSearch(context.Background(), testQuery, false, &page, &page, "")
+	require.NoError(t, err)
+	require.Len(t, resultTxSearch.Txs, 1)
+	require.Equal(t, types.Tx(testTx), resultTxSearch.Txs[0].Tx)
+
+	cancel()
+	wg.Wait()
+
+	eventSinkMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+	blockStoreMock.AssertExpectations(t)
+}
+func TestTx(t *testing.T) {
+	testHash := []byte("test")
+	testTx := []byte("tx")
+
+	stateStoreMock := &statemocks.Store{}
+	blockStoreMock := &statemocks.BlockStore{}
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	eventSinkMock.On("Type").Return(indexer.KV)
+	eventSinkMock.On("GetTxByHash", testHash).Return(&abcitypes.TxResult{
+		Tx: testTx,
+	}, nil)
+
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+
+	res, err := cli.Tx(context.Background(), testHash, false)
+	require.NoError(t, err)
+	require.Equal(t, types.Tx(testTx), res.Tx)
+
+	cancel()
+	wg.Wait()
+
+	eventSinkMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+	blockStoreMock.AssertExpectations(t)
+}
+func TestConsensusParams(t *testing.T) {
+	testHeight := int64(1)
+	testMaxGas := int64(55)
+	stateStoreMock := &statemocks.Store{}
+	blockStoreMock := &statemocks.BlockStore{}
+	blockStoreMock.On("Height").Return(testHeight)
+	blockStoreMock.On("Base").Return(int64(0))
+	stateStoreMock.On("LoadConsensusParams", testHeight).Return(types.ConsensusParams{
+		Block: types.BlockParams{
+			MaxGas: testMaxGas,
+		},
+	}, nil)
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+	params, err := cli.ConsensusParams(context.Background(), &testHeight)
+	require.NoError(t, err)
+	require.Equal(t, params.ConsensusParams.Block.MaxGas, testMaxGas)
+
+	cancel()
+	wg.Wait()
+
+	blockStoreMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+}
+
+func TestBlockResults(t *testing.T) {
+	testHeight := int64(1)
+	testGasUsed := int64(100)
+	stateStoreMock := &statemocks.Store{}
+	//	tmstate "github.com/tendermint/tendermint/proto/tendermint/state"
+	stateStoreMock.On("LoadABCIResponses", testHeight).Return(&state.ABCIResponses{
+		DeliverTxs: []*abcitypes.ResponseDeliverTx{
+			{
+				GasUsed: testGasUsed,
+			},
+		},
+		EndBlock:   &abcitypes.ResponseEndBlock{},
+		BeginBlock: &abcitypes.ResponseBeginBlock{},
+	}, nil)
+	blockStoreMock := &statemocks.BlockStore{}
+	blockStoreMock.On("Base").Return(int64(0))
+	blockStoreMock.On("Height").Return(testHeight)
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+	res, err := cli.BlockResults(context.Background(), &testHeight)
+	require.NoError(t, err)
+	require.Equal(t, res.TotalGasUsed, testGasUsed)
+
+	cancel()
+	wg.Wait()
+
+	blockStoreMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+}
+
+func TestCommit(t *testing.T) {
+	testHeight := int64(1)
+	testRound := int32(101)
+	stateStoreMock := &statemocks.Store{}
+	blockStoreMock := &statemocks.BlockStore{}
+	blockStoreMock.On("Base").Return(int64(0))
+	blockStoreMock.On("Height").Return(testHeight)
+	blockStoreMock.On("LoadBlockMeta", testHeight).Return(&types.BlockMeta{}, nil)
+	blockStoreMock.On("LoadSeenCommit").Return(&types.Commit{
+		Height: testHeight,
+		Round:  testRound,
+	}, nil)
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+	res, err := cli.Commit(context.Background(), &testHeight)
+	require.NoError(t, err)
+	require.NotNil(t, res)
+	require.Equal(t, res.SignedHeader.Commit.Round, testRound)
+
+	cancel()
+	wg.Wait()
+
+	blockStoreMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+}
+
+func TestBlockByHash(t *testing.T) {
+	testHeight := int64(1)
+	testHash := []byte("test hash")
+	testBlock := new(types.Block)
+	testBlock.Header.Height = testHeight
+	testBlock.Header.LastCommitHash = testHash
+	stateStoreMock := &statemocks.Store{}
+	blockStoreMock := &statemocks.BlockStore{}
+	blockStoreMock.On("LoadBlockMeta", testHeight).Return(&types.BlockMeta{
+		BlockID: types.BlockID{
+			Hash: testHash,
+		},
+		Header: types.Header{
+			Height: testHeight,
+		},
+	}, nil)
+	blockStoreMock.On("LoadBlockByHash", testHash).Return(testBlock, nil)
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+	res, err := cli.BlockByHash(context.Background(), testHash)
+	require.NoError(t, err)
+	require.NotNil(t, res)
+	require.Equal(t, []byte(res.BlockID.Hash), testHash)
+
+	cancel()
+	wg.Wait()
+
+	blockStoreMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+}
+
+func TestBlockchain(t *testing.T) {
+	testHeight := int64(1)
+	testBlock := new(types.Block)
+	testBlockHash := []byte("test hash")
+	testBlock.Header.Height = testHeight
+	testBlock.Header.LastCommitHash = testBlockHash
+	stateStoreMock := &statemocks.Store{}
+
+	blockStoreMock := &statemocks.BlockStore{}
+	blockStoreMock.On("Height").Return(testHeight)
+	blockStoreMock.On("Base").Return(int64(0))
+	blockStoreMock.On("LoadBlockMeta", testHeight).Return(&types.BlockMeta{
+		BlockID: types.BlockID{
+			Hash: testBlockHash,
+		},
+	})
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+	res, err := cli.BlockchainInfo(context.Background(), 0, 100)
+	require.NoError(t, err)
+	require.NotNil(t, res)
+	require.Equal(t, testBlockHash, []byte(res.BlockMetas[0].BlockID.Hash))
+
+	cancel()
+	wg.Wait()
+
+	blockStoreMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+}
+
+func TestValidators(t *testing.T) {
+	testHeight := int64(1)
+	testVotingPower := int64(100)
+	testValidators := types.ValidatorSet{
+		Validators: []*types.Validator{
+			{
+				VotingPower: testVotingPower,
+			},
+		},
+	}
+	stateStoreMock := &statemocks.Store{}
+	stateStoreMock.On("LoadValidators", testHeight).Return(&testValidators, nil)
+
+	blockStoreMock := &statemocks.BlockStore{}
+	blockStoreMock.On("Height").Return(testHeight)
+	blockStoreMock.On("Base").Return(int64(0))
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+
+	testPage := 1
+	testPerPage := 100
+	res, err := cli.Validators(context.Background(), &testHeight, &testPage, &testPerPage)
+	require.NoError(t, err)
+	require.NotNil(t, res)
+	require.Equal(t, testVotingPower, res.Validators[0].VotingPower)
+
+	cancel()
+	wg.Wait()
+
+	blockStoreMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+}
+
+func TestBlockSearch(t *testing.T) {
+	testHeight := int64(1)
+	testBlockHash := []byte("test hash")
+	testQuery := "block.height = 1"
+	stateStoreMock := &statemocks.Store{}
+
+	blockStoreMock := &statemocks.BlockStore{}
+	eventSinkMock := &indexermocks.EventSink{}
+	eventSinkMock.On("Stop").Return(nil)
+	eventSinkMock.On("Type").Return(indexer.KV)
+	blockStoreMock.On("LoadBlock", testHeight).Return(&types.Block{
+		Header: types.Header{
+			Height: testHeight,
+		},
+	}, nil)
+	blockStoreMock.On("LoadBlockMeta", testHeight).Return(&types.BlockMeta{
+		BlockID: types.BlockID{
+			Hash: testBlockHash,
+		},
+	})
+	eventSinkMock.On("SearchBlockEvents", mock.Anything,
+		mock.MatchedBy(func(q *query.Query) bool { return testQuery == q.String() })).
+		Return([]int64{testHeight}, nil)
+	rpcConfig := config.TestRPCConfig()
+	l := log.TestingLogger()
+	d := inspect.New(rpcConfig, blockStoreMock, stateStoreMock, []indexer.EventSink{eventSinkMock}, l)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	wg := &sync.WaitGroup{}
+	wg.Add(1)
+
+	startedWG := &sync.WaitGroup{}
+	startedWG.Add(1)
+	go func() {
+		startedWG.Done()
+		defer wg.Done()
+		require.NoError(t, d.Run(ctx))
+	}()
+	// FIXME: used to induce context switch.
+	// Determine more deterministic method for prompting a context switch
+	startedWG.Wait()
+	requireConnect(t, rpcConfig.ListenAddress, 20)
+	cli, err := httpclient.New(rpcConfig.ListenAddress)
+	require.NoError(t, err)
+
+	testPage := 1
+	testPerPage := 100
+	testOrderBy := "desc"
+	res, err := cli.BlockSearch(context.Background(), testQuery, &testPage, &testPerPage, testOrderBy)
+	require.NoError(t, err)
+	require.NotNil(t, res)
+	require.Equal(t, testBlockHash, []byte(res.Blocks[0].BlockID.Hash))
+
+	cancel()
+	wg.Wait()
+
+	blockStoreMock.AssertExpectations(t)
+	stateStoreMock.AssertExpectations(t)
+}
+
+func requireConnect(t testing.TB, addr string, retries int) {
+	parts := strings.SplitN(addr, "://", 2)
+	if len(parts) != 2 {
+		t.Fatalf("malformed address to dial: %s", addr)
+	}
+	var err error
+	for i := 0; i < retries; i++ {
+		var conn net.Conn
+		conn, err = net.Dial(parts[0], parts[1])
+		if err == nil {
+			conn.Close()
+			return
+		}
+		// FIXME attempt to yield and let the other goroutine continue execution.
+		time.Sleep(time.Microsecond * 100)
+	}
+	t.Fatalf("unable to connect to server %s after %d tries: %s", addr, retries, err)
+}

inspect/rpc/rpc.go

@@ -0,0 +1,143 @@
+package rpc
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/rs/cors"
+
+	"github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/internal/consensus"
+	"github.com/tendermint/tendermint/libs/log"
+	"github.com/tendermint/tendermint/libs/pubsub"
+	"github.com/tendermint/tendermint/rpc/core"
+	"github.com/tendermint/tendermint/rpc/jsonrpc/server"
+	"github.com/tendermint/tendermint/state"
+	"github.com/tendermint/tendermint/state/indexer"
+	"github.com/tendermint/tendermint/types"
+)
+
+// Server defines parameters for running an Inspector rpc server.
+type Server struct {
+	Addr    string // TCP address to listen on, ":http" if empty
+	Handler http.Handler
+	Logger  log.Logger
+	Config  *config.RPCConfig
+}
+
+// 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,
+		EventSinks:       es,
+		StateStore:       s,
+		BlockStore:       bs,
+		ConsensusReactor: waitSyncCheckerImpl{},
+		Logger:           logger,
+	}
+	return core.RoutesMap{
+		"blockchain":       server.NewRPCFunc(env.BlockchainInfo, "minHeight,maxHeight", true),
+		"consensus_params": server.NewRPCFunc(env.ConsensusParams, "height", true),
+		"block":            server.NewRPCFunc(env.Block, "height", true),
+		"block_by_hash":    server.NewRPCFunc(env.BlockByHash, "hash", true),
+		"block_results":    server.NewRPCFunc(env.BlockResults, "height", true),
+		"commit":           server.NewRPCFunc(env.Commit, "height", true),
+		"validators":       server.NewRPCFunc(env.Validators, "height,page,per_page", true),
+		"tx":               server.NewRPCFunc(env.Tx, "hash,prove", true),
+		"tx_search":        server.NewRPCFunc(env.TxSearch, "query,prove,page,per_page,order_by", false),
+		"block_search":     server.NewRPCFunc(env.BlockSearch, "query,page,per_page,order_by", false),
+	}
+}
+
+// Handler returns the http.Handler configured for use with an Inspector server. Handler
+// registers the routes on the http.Handler and also registers the websocket handler
+// and the CORS handler if specified by the configuration options.
+func Handler(rpcConfig *config.RPCConfig, routes core.RoutesMap, logger log.Logger) http.Handler {
+	mux := http.NewServeMux()
+	wmLogger := logger.With("protocol", "websocket")
+
+	var eventBus types.EventBusSubscriber
+
+	websocketDisconnectFn := func(remoteAddr string) {
+		err := eventBus.UnsubscribeAll(context.Background(), remoteAddr)
+		if err != nil && err != pubsub.ErrSubscriptionNotFound {
+			wmLogger.Error("Failed to unsubscribe addr from events", "addr", remoteAddr, "err", err)
+		}
+	}
+	wm := server.NewWebsocketManager(routes,
+		server.OnDisconnect(websocketDisconnectFn),
+		server.ReadLimit(rpcConfig.MaxBodyBytes))
+	wm.SetLogger(wmLogger)
+	mux.HandleFunc("/websocket", wm.WebsocketHandler)
+
+	server.RegisterRPCFuncs(mux, routes, logger)
+	var rootHandler http.Handler = mux
+	if rpcConfig.IsCorsEnabled() {
+		rootHandler = addCORSHandler(rpcConfig, mux)
+	}
+	return rootHandler
+}
+
+func addCORSHandler(rpcConfig *config.RPCConfig, h http.Handler) http.Handler {
+	corsMiddleware := cors.New(cors.Options{
+		AllowedOrigins: rpcConfig.CORSAllowedOrigins,
+		AllowedMethods: rpcConfig.CORSAllowedMethods,
+		AllowedHeaders: rpcConfig.CORSAllowedHeaders,
+	})
+	h = corsMiddleware.Handler(h)
+	return h
+}
+
+type waitSyncCheckerImpl struct{}
+
+func (waitSyncCheckerImpl) WaitSync() bool {
+	return false
+}
+
+func (waitSyncCheckerImpl) GetPeerState(peerID types.NodeID) (*consensus.PeerState, bool) {
+	return nil, false
+}
+
+// ListenAndServe listens on the address specified in srv.Addr and handles any
+// incoming requests over HTTP using the Inspector rpc handler specified on the server.
+func (srv *Server) ListenAndServe(ctx context.Context) error {
+	listener, err := server.Listen(srv.Addr, srv.Config.MaxOpenConnections)
+	if err != nil {
+		return err
+	}
+	go func() {
+		<-ctx.Done()
+		listener.Close()
+	}()
+	return server.Serve(listener, srv.Handler, srv.Logger, serverRPCConfig(srv.Config))
+}
+
+// ListenAndServeTLS listens on the address specified in srv.Addr. ListenAndServeTLS handles
+// incoming requests over HTTPS using the Inspector rpc handler specified on the server.
+func (srv *Server) ListenAndServeTLS(ctx context.Context, certFile, keyFile string) error {
+	listener, err := server.Listen(srv.Addr, srv.Config.MaxOpenConnections)
+	if err != nil {
+		return err
+	}
+	go func() {
+		<-ctx.Done()
+		listener.Close()
+	}()
+	return server.ServeTLS(listener, srv.Handler, certFile, keyFile, srv.Logger, serverRPCConfig(srv.Config))
+}
+
+func serverRPCConfig(r *config.RPCConfig) *server.Config {
+	cfg := server.DefaultConfig()
+	cfg.MaxBodyBytes = r.MaxBodyBytes
+	cfg.MaxHeaderBytes = r.MaxHeaderBytes
+	// If necessary adjust global WriteTimeout to ensure it's greater than
+	// TimeoutBroadcastTxCommit.
+	// See https://github.com/tendermint/tendermint/issues/3435
+	if cfg.WriteTimeout <= r.TimeoutBroadcastTxCommit {
+		cfg.WriteTimeout = r.TimeoutBroadcastTxCommit + 1*time.Second
+	}
+	return cfg
+}

internal/blocksync/doc.go

@@ -1,19 +1,19 @@
 /*
-Package blockchain implements two versions of a reactor Service that are
-responsible for block propagation and gossip between peers. This mechanism is
-more formally known as fast-sync.
+Package blocksync implements two versions of a reactor Service that are
+responsible for block propagation and gossip between peers. This mechanism was
+formerly known as fast-sync.
 
 In order for a full node to successfully participate in consensus, it must have
-the latest view of state. The fast-sync protocol is a mechanism in which peers
+the latest view of state. The blocksync protocol is a mechanism in which peers
 may exchange and gossip entire blocks with one another, in a request/response
 type model, until they've successfully synced to the latest head block. Once
 succussfully synced, the full node can switch to an active role in consensus and
-will no longer fast-sync and thus no longer run the fast-sync process.
+will no longer blocksync and thus no longer run the blocksync process.
 
-Note, the blockchain reactor Service gossips entire block and relevant data such
-that each receiving peer may construct the entire view of the blockchain state.
+Note, the blocksync reactor Service gossips entire block and relevant data such
+that each receiving peer may construct the entire view of the blocksync state.
 
-There are two versions of the blockchain reactor Service, i.e. fast-sync:
+There are currently two versions of the blocksync reactor Service:
 
 - v0: The initial implementation that is battle-tested, but whose test coverage
 	is lacking and is not formally verifiable.
@@ -22,7 +22,7 @@ There are two versions of the blockchain reactor Service, i.e. fast-sync:
 	is known to have various bugs that could make it unreliable in production
 	environments.
 
-The v0 blockchain reactor Service has one p2p channel, BlockchainChannel. This
+The v0 blocksync reactor Service has one p2p channel, BlockchainChannel. This
 channel is responsible for handling messages that both request blocks and respond
 to block requests from peers. For every block request from a peer, the reactor
 will execute respondToPeer which will fetch the block from the node's state store
@@ -33,4 +33,4 @@ Internally, v0 runs a poolRoutine that constantly checks for what blocks it need
 and requests them. The poolRoutine is also responsible for taking blocks from the
 pool, saving and executing each block.
 */
-package blockchain
+package blocksync

internal/blocksync/msgs.go

@@ -1,7 +1,7 @@
-package blockchain
+package blocksync
 
 import (
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/types"
 )
 

internal/blocksync/v0/pool.go

@@ -65,7 +65,7 @@ type BlockRequest struct {
 	PeerID types.NodeID
 }
 
-// BlockPool keeps track of the fast sync peers, block requests and block responses.
+// BlockPool keeps track of the block sync peers, block requests and block responses.
 type BlockPool struct {
 	service.BaseService
 	lastAdvance time.Time

internal/blocksync/v0/reactor.go

@@ -6,13 +6,13 @@ import (
 	"sync"
 	"time"
 
-	bc "github.com/tendermint/tendermint/internal/blockchain"
+	bc "github.com/tendermint/tendermint/internal/blocksync"
 	cons "github.com/tendermint/tendermint/internal/consensus"
 	"github.com/tendermint/tendermint/internal/p2p"
 	"github.com/tendermint/tendermint/libs/log"
 	"github.com/tendermint/tendermint/libs/service"
 	tmSync "github.com/tendermint/tendermint/libs/sync"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	sm "github.com/tendermint/tendermint/state"
 	"github.com/tendermint/tendermint/store"
 	"github.com/tendermint/tendermint/types"
@@ -29,10 +29,10 @@ var (
 	// TODO: Remove once p2p refactor is complete.
 	// ref: https://github.com/tendermint/tendermint/issues/5670
 	ChannelShims = map[p2p.ChannelID]*p2p.ChannelDescriptorShim{
-		BlockchainChannel: {
+		BlockSyncChannel: {
 			MsgType: new(bcproto.Message),
 			Descriptor: &p2p.ChannelDescriptor{
-				ID:                  byte(BlockchainChannel),
+				ID:                  byte(BlockSyncChannel),
 				Priority:            5,
 				SendQueueCapacity:   1000,
 				RecvBufferCapacity:  1024,
@@ -44,8 +44,8 @@ var (
 )
 
 const (
-	// BlockchainChannel is a channel for blocks and status updates
-	BlockchainChannel = p2p.ChannelID(0x40)
+	// BlockSyncChannel is a channel for blocks and status updates
+	BlockSyncChannel = p2p.ChannelID(0x40)
 
 	trySyncIntervalMS = 10
 
@@ -60,7 +60,7 @@ const (
 )
 
 type consensusReactor interface {
-	// For when we switch from blockchain reactor and fast sync to the consensus
+	// For when we switch from block sync reactor to the consensus
 	// machine.
 	SwitchToConsensus(state sm.State, skipWAL bool)
 }
@@ -85,19 +85,19 @@ type Reactor struct {
 	store       *store.BlockStore
 	pool        *BlockPool
 	consReactor consensusReactor
-	fastSync    *tmSync.AtomicBool
+	blockSync   *tmSync.AtomicBool
 
-	blockchainCh *p2p.Channel
-	// blockchainOutBridgeCh defines a channel that acts as a bridge between sending Envelope
-	// messages that the reactor will consume in processBlockchainCh and receiving messages
+	blockSyncCh *p2p.Channel
+	// blockSyncOutBridgeCh defines a channel that acts as a bridge between sending Envelope
+	// messages that the reactor will consume in processBlockSyncCh and receiving messages
 	// from the peer updates channel and other goroutines. We do this instead of directly
-	// sending on blockchainCh.Out to avoid race conditions in the case where other goroutines
-	// send Envelopes directly to the to blockchainCh.Out channel, since processBlockchainCh
-	// may close the blockchainCh.Out channel at the same time that other goroutines send to
-	// blockchainCh.Out.
-	blockchainOutBridgeCh chan p2p.Envelope
-	peerUpdates           *p2p.PeerUpdates
-	closeCh               chan struct{}
+	// sending on blockSyncCh.Out to avoid race conditions in the case where other goroutines
+	// send Envelopes directly to the to blockSyncCh.Out channel, since processBlockSyncCh
+	// may close the blockSyncCh.Out channel at the same time that other goroutines send to
+	// blockSyncCh.Out.
+	blockSyncOutBridgeCh chan p2p.Envelope
+	peerUpdates          *p2p.PeerUpdates
+	closeCh              chan struct{}
 
 	requestsCh <-chan BlockRequest
 	errorsCh   <-chan peerError
@@ -119,9 +119,9 @@ func NewReactor(
 	blockExec *sm.BlockExecutor,
 	store *store.BlockStore,
 	consReactor consensusReactor,
-	blockchainCh *p2p.Channel,
+	blockSyncCh *p2p.Channel,
 	peerUpdates *p2p.PeerUpdates,
-	fastSync bool,
+	blockSync bool,
 	metrics *cons.Metrics,
 ) (*Reactor, error) {
 	if state.LastBlockHeight != store.Height() {
@@ -137,23 +137,23 @@ func NewReactor(
 	errorsCh := make(chan peerError, maxPeerErrBuffer) // NOTE: The capacity should be larger than the peer count.
 
 	r := &Reactor{
-		initialState:          state,
-		blockExec:             blockExec,
-		store:                 store,
-		pool:                  NewBlockPool(startHeight, requestsCh, errorsCh),
-		consReactor:           consReactor,
-		fastSync:              tmSync.NewBool(fastSync),
-		requestsCh:            requestsCh,
-		errorsCh:              errorsCh,
-		blockchainCh:          blockchainCh,
-		blockchainOutBridgeCh: make(chan p2p.Envelope),
-		peerUpdates:           peerUpdates,
-		closeCh:               make(chan struct{}),
-		metrics:               metrics,
-		syncStartTime:         time.Time{},
+		initialState:         state,
+		blockExec:            blockExec,
+		store:                store,
+		pool:                 NewBlockPool(startHeight, requestsCh, errorsCh),
+		consReactor:          consReactor,
+		blockSync:            tmSync.NewBool(blockSync),
+		requestsCh:           requestsCh,
+		errorsCh:             errorsCh,
+		blockSyncCh:          blockSyncCh,
+		blockSyncOutBridgeCh: make(chan p2p.Envelope),
+		peerUpdates:          peerUpdates,
+		closeCh:              make(chan struct{}),
+		metrics:              metrics,
+		syncStartTime:        time.Time{},
 	}
 
-	r.BaseService = *service.NewBaseService(logger, "Blockchain", r)
+	r.BaseService = *service.NewBaseService(logger, "BlockSync", r)
 	return r, nil
 }
 
@@ -162,10 +162,10 @@ func NewReactor(
 // messages on that p2p channel accordingly. The caller must be sure to execute
 // OnStop to ensure the outbound p2p Channels are closed.
 //
-// If fastSync is enabled, we also start the pool and the pool processing
+// If blockSync is enabled, we also start the pool and the pool processing
 // goroutine. If the pool fails to start, an error is returned.
 func (r *Reactor) OnStart() error {
-	if r.fastSync.IsSet() {
+	if r.blockSync.IsSet() {
 		if err := r.pool.Start(); err != nil {
 			return err
 		}
@@ -174,7 +174,7 @@ func (r *Reactor) OnStart() error {
 		go r.poolRoutine(false)
 	}
 
-	go r.processBlockchainCh()
+	go r.processBlockSyncCh()
 	go r.processPeerUpdates()
 
 	return nil
@@ -183,7 +183,7 @@ func (r *Reactor) OnStart() error {
 // OnStop stops the reactor by signaling to all spawned goroutines to exit and
 // blocking until they all exit.
 func (r *Reactor) OnStop() {
-	if r.fastSync.IsSet() {
+	if r.blockSync.IsSet() {
 		if err := r.pool.Stop(); err != nil {
 			r.Logger.Error("failed to stop pool", "err", err)
 		}
@@ -199,7 +199,7 @@ func (r *Reactor) OnStop() {
 	// Wait for all p2p Channels to be closed before returning. This ensures we
 	// can easily reason about synchronization of all p2p Channels and ensure no
 	// panics will occur.
-	<-r.blockchainCh.Done()
+	<-r.blockSyncCh.Done()
 	<-r.peerUpdates.Done()
 }
 
@@ -214,7 +214,7 @@ func (r *Reactor) respondToPeer(msg *bcproto.BlockRequest, peerID types.NodeID)
 			return
 		}
 
-		r.blockchainCh.Out <- p2p.Envelope{
+		r.blockSyncCh.Out <- p2p.Envelope{
 			To:      peerID,
 			Message: &bcproto.BlockResponse{Block: blockProto},
 		}
@@ -223,16 +223,16 @@ func (r *Reactor) respondToPeer(msg *bcproto.BlockRequest, peerID types.NodeID)
 	}
 
 	r.Logger.Info("peer requesting a block we do not have", "peer", peerID, "height", msg.Height)
-	r.blockchainCh.Out <- p2p.Envelope{
+	r.blockSyncCh.Out <- p2p.Envelope{
 		To:      peerID,
 		Message: &bcproto.NoBlockResponse{Height: msg.Height},
 	}
 }
 
-// handleBlockchainMessage handles envelopes sent from peers on the
-// BlockchainChannel. It returns an error only if the Envelope.Message is unknown
+// handleBlockSyncMessage handles envelopes sent from peers on the
+// BlockSyncChannel. It returns an error only if the Envelope.Message is unknown
 // for this channel. This should never be called outside of handleMessage.
-func (r *Reactor) handleBlockchainMessage(envelope p2p.Envelope) error {
+func (r *Reactor) handleBlockSyncMessage(envelope p2p.Envelope) error {
 	logger := r.Logger.With("peer", envelope.From)
 
 	switch msg := envelope.Message.(type) {
@@ -249,7 +249,7 @@ func (r *Reactor) handleBlockchainMessage(envelope p2p.Envelope) error {
 		r.pool.AddBlock(envelope.From, block, block.Size())
 
 	case *bcproto.StatusRequest:
-		r.blockchainCh.Out <- p2p.Envelope{
+		r.blockSyncCh.Out <- p2p.Envelope{
 			To: envelope.From,
 			Message: &bcproto.StatusResponse{
 				Height: r.store.Height(),
@@ -288,8 +288,8 @@ func (r *Reactor) handleMessage(chID p2p.ChannelID, envelope p2p.Envelope) (err
 	r.Logger.Debug("received message", "message", envelope.Message, "peer", envelope.From)
 
 	switch chID {
-	case BlockchainChannel:
-		err = r.handleBlockchainMessage(envelope)
+	case BlockSyncChannel:
+		err = r.handleBlockSyncMessage(envelope)
 
 	default:
 		err = fmt.Errorf("unknown channel ID (%d) for envelope (%v)", chID, envelope)
@@ -298,30 +298,30 @@ func (r *Reactor) handleMessage(chID p2p.ChannelID, envelope p2p.Envelope) (err
 	return err
 }
 
-// processBlockchainCh initiates a blocking process where we listen for and handle
-// envelopes on the BlockchainChannel and blockchainOutBridgeCh. Any error encountered during
-// message execution will result in a PeerError being sent on the BlockchainChannel.
+// processBlockSyncCh initiates a blocking process where we listen for and handle
+// envelopes on the BlockSyncChannel and blockSyncOutBridgeCh. Any error encountered during
+// message execution will result in a PeerError being sent on the BlockSyncChannel.
 // When the reactor is stopped, we will catch the signal and close the p2p Channel
 // gracefully.
-func (r *Reactor) processBlockchainCh() {
-	defer r.blockchainCh.Close()
+func (r *Reactor) processBlockSyncCh() {
+	defer r.blockSyncCh.Close()
 
 	for {
 		select {
-		case envelope := <-r.blockchainCh.In:
-			if err := r.handleMessage(r.blockchainCh.ID, envelope); err != nil {
-				r.Logger.Error("failed to process message", "ch_id", r.blockchainCh.ID, "envelope", envelope, "err", err)
-				r.blockchainCh.Error <- p2p.PeerError{
+		case envelope := <-r.blockSyncCh.In:
+			if err := r.handleMessage(r.blockSyncCh.ID, envelope); err != nil {
+				r.Logger.Error("failed to process message", "ch_id", r.blockSyncCh.ID, "envelope", envelope, "err", err)
+				r.blockSyncCh.Error <- p2p.PeerError{
 					NodeID: envelope.From,
 					Err:    err,
 				}
 			}
 
-		case envelope := <-r.blockchainOutBridgeCh:
-			r.blockchainCh.Out <- envelope
+		case envelope := <-r.blockSyncOutBridgeCh:
+			r.blockSyncCh.Out <- envelope
 
 		case <-r.closeCh:
-			r.Logger.Debug("stopped listening on blockchain channel; closing...")
+			r.Logger.Debug("stopped listening on block sync channel; closing...")
 			return
 
 		}
@@ -340,7 +340,7 @@ func (r *Reactor) processPeerUpdate(peerUpdate p2p.PeerUpdate) {
 	switch peerUpdate.Status {
 	case p2p.PeerStatusUp:
 		// send a status update the newly added peer
-		r.blockchainOutBridgeCh <- p2p.Envelope{
+		r.blockSyncOutBridgeCh <- p2p.Envelope{
 			To: peerUpdate.NodeID,
 			Message: &bcproto.StatusResponse{
 				Base:   r.store.Base(),
@@ -371,10 +371,10 @@ func (r *Reactor) processPeerUpdates() {
 	}
 }
 
-// SwitchToFastSync is called by the state sync reactor when switching to fast
+// SwitchToBlockSync is called by the state sync reactor when switching to fast
 // sync.
-func (r *Reactor) SwitchToFastSync(state sm.State) error {
-	r.fastSync.Set()
+func (r *Reactor) SwitchToBlockSync(state sm.State) error {
+	r.blockSync.Set()
 	r.initialState = state
 	r.pool.height = state.LastBlockHeight + 1
 
@@ -406,13 +406,13 @@ func (r *Reactor) requestRoutine() {
 			return
 
 		case request := <-r.requestsCh:
-			r.blockchainOutBridgeCh <- p2p.Envelope{
+			r.blockSyncOutBridgeCh <- p2p.Envelope{
 				To:      request.PeerID,
 				Message: &bcproto.BlockRequest{Height: request.Height},
 			}
 
 		case pErr := <-r.errorsCh:
-			r.blockchainCh.Error <- p2p.PeerError{
+			r.blockSyncCh.Error <- p2p.PeerError{
 				NodeID: pErr.peerID,
 				Err:    pErr.err,
 			}
@@ -423,7 +423,7 @@ func (r *Reactor) requestRoutine() {
 			go func() {
 				defer r.poolWG.Done()
 
-				r.blockchainOutBridgeCh <- p2p.Envelope{
+				r.blockSyncOutBridgeCh <- p2p.Envelope{
 					Broadcast: true,
 					Message:   &bcproto.StatusRequest{},
 				}
@@ -496,7 +496,7 @@ FOR_LOOP:
 				r.Logger.Error("failed to stop pool", "err", err)
 			}
 
-			r.fastSync.UnSet()
+			r.blockSync.UnSet()
 
 			if r.consReactor != nil {
 				r.consReactor.SwitchToConsensus(state, blocksSynced > 0 || stateSynced)
@@ -554,14 +554,14 @@ FOR_LOOP:
 				// NOTE: We've already removed the peer's request, but we still need
 				// to clean up the rest.
 				peerID := r.pool.RedoRequest(first.Height)
-				r.blockchainCh.Error <- p2p.PeerError{
+				r.blockSyncCh.Error <- p2p.PeerError{
 					NodeID: peerID,
 					Err:    err,
 				}
 
 				peerID2 := r.pool.RedoRequest(second.Height)
 				if peerID2 != peerID {
-					r.blockchainCh.Error <- p2p.PeerError{
+					r.blockSyncCh.Error <- p2p.PeerError{
 						NodeID: peerID2,
 						Err:    err,
 					}
@@ -591,7 +591,7 @@ FOR_LOOP:
 				if blocksSynced%100 == 0 {
 					lastRate = 0.9*lastRate + 0.1*(100/time.Since(lastHundred).Seconds())
 					r.Logger.Info(
-						"fast sync rate",
+						"block sync rate",
 						"height", r.pool.height,
 						"max_peer_height", r.pool.MaxPeerHeight(),
 						"blocks/s", lastRate,
@@ -614,14 +614,14 @@ func (r *Reactor) GetMaxPeerBlockHeight() int64 {
 }
 
 func (r *Reactor) GetTotalSyncedTime() time.Duration {
-	if !r.fastSync.IsSet() || r.syncStartTime.IsZero() {
+	if !r.blockSync.IsSet() || r.syncStartTime.IsZero() {
 		return time.Duration(0)
 	}
 	return time.Since(r.syncStartTime)
 }
 
 func (r *Reactor) GetRemainingSyncTime() time.Duration {
-	if !r.fastSync.IsSet() {
+	if !r.blockSync.IsSet() {
 		return time.Duration(0)
 	}
 

internal/blocksync/v0/reactor_test.go

@@ -15,7 +15,7 @@ import (
 	"github.com/tendermint/tendermint/internal/p2p/p2ptest"
 	"github.com/tendermint/tendermint/internal/test/factory"
 	"github.com/tendermint/tendermint/libs/log"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/proxy"
 	sm "github.com/tendermint/tendermint/state"
 	sf "github.com/tendermint/tendermint/state/test/factory"
@@ -32,11 +32,11 @@ type reactorTestSuite struct {
 	reactors map[types.NodeID]*Reactor
 	app      map[types.NodeID]proxy.AppConns
 
-	blockchainChannels map[types.NodeID]*p2p.Channel
-	peerChans          map[types.NodeID]chan p2p.PeerUpdate
-	peerUpdates        map[types.NodeID]*p2p.PeerUpdates
+	blockSyncChannels map[types.NodeID]*p2p.Channel
+	peerChans         map[types.NodeID]chan p2p.PeerUpdate
+	peerUpdates       map[types.NodeID]*p2p.PeerUpdates
 
-	fastSync bool
+	blockSync bool
 }
 
 func setup(
@@ -53,19 +53,19 @@ func setup(
 		"must specify at least one block height (nodes)")
 
 	rts := &reactorTestSuite{
-		logger:             log.TestingLogger().With("module", "blockchain", "testCase", t.Name()),
-		network:            p2ptest.MakeNetwork(t, p2ptest.NetworkOptions{NumNodes: numNodes}),
-		nodes:              make([]types.NodeID, 0, numNodes),
-		reactors:           make(map[types.NodeID]*Reactor, numNodes),
-		app:                make(map[types.NodeID]proxy.AppConns, numNodes),
-		blockchainChannels: make(map[types.NodeID]*p2p.Channel, numNodes),
-		peerChans:          make(map[types.NodeID]chan p2p.PeerUpdate, numNodes),
-		peerUpdates:        make(map[types.NodeID]*p2p.PeerUpdates, numNodes),
-		fastSync:           true,
+		logger:            log.TestingLogger().With("module", "block_sync", "testCase", t.Name()),
+		network:           p2ptest.MakeNetwork(t, p2ptest.NetworkOptions{NumNodes: numNodes}),
+		nodes:             make([]types.NodeID, 0, numNodes),
+		reactors:          make(map[types.NodeID]*Reactor, numNodes),
+		app:               make(map[types.NodeID]proxy.AppConns, numNodes),
+		blockSyncChannels: make(map[types.NodeID]*p2p.Channel, numNodes),
+		peerChans:         make(map[types.NodeID]chan p2p.PeerUpdate, numNodes),
+		peerUpdates:       make(map[types.NodeID]*p2p.PeerUpdates, numNodes),
+		blockSync:         true,
 	}
 
-	chDesc := p2p.ChannelDescriptor{ID: byte(BlockchainChannel)}
-	rts.blockchainChannels = rts.network.MakeChannelsNoCleanup(t, chDesc, new(bcproto.Message), int(chBuf))
+	chDesc := p2p.ChannelDescriptor{ID: byte(BlockSyncChannel)}
+	rts.blockSyncChannels = rts.network.MakeChannelsNoCleanup(t, chDesc, new(bcproto.Message), int(chBuf))
 
 	i := 0
 	for nodeID := range rts.network.Nodes {
@@ -161,9 +161,9 @@ func (rts *reactorTestSuite) addNode(t *testing.T,
 		blockExec,
 		blockStore,
 		nil,
-		rts.blockchainChannels[nodeID],
+		rts.blockSyncChannels[nodeID],
 		rts.peerUpdates[nodeID],
-		rts.fastSync,
+		rts.blockSync,
 		cons.NopMetrics())
 	require.NoError(t, err)
 
@@ -181,7 +181,7 @@ func (rts *reactorTestSuite) start(t *testing.T) {
 }
 
 func TestReactor_AbruptDisconnect(t *testing.T) {
-	config := cfg.ResetTestRoot("blockchain_reactor_test")
+	config := cfg.ResetTestRoot("block_sync_reactor_test")
 	defer os.RemoveAll(config.RootDir)
 
 	genDoc, privVals := factory.RandGenesisDoc(config, 1, false, 30)
@@ -216,7 +216,7 @@ func TestReactor_AbruptDisconnect(t *testing.T) {
 }
 
 func TestReactor_SyncTime(t *testing.T) {
-	config := cfg.ResetTestRoot("blockchain_reactor_test")
+	config := cfg.ResetTestRoot("block_sync_reactor_test")
 	defer os.RemoveAll(config.RootDir)
 
 	genDoc, privVals := factory.RandGenesisDoc(config, 1, false, 30)
@@ -239,7 +239,7 @@ func TestReactor_SyncTime(t *testing.T) {
 }
 
 func TestReactor_NoBlockResponse(t *testing.T) {
-	config := cfg.ResetTestRoot("blockchain_reactor_test")
+	config := cfg.ResetTestRoot("block_sync_reactor_test")
 	defer os.RemoveAll(config.RootDir)
 
 	genDoc, privVals := factory.RandGenesisDoc(config, 1, false, 30)
@@ -286,7 +286,7 @@ func TestReactor_BadBlockStopsPeer(t *testing.T) {
 	// See: https://github.com/tendermint/tendermint/issues/6005
 	t.SkipNow()
 
-	config := cfg.ResetTestRoot("blockchain_reactor_test")
+	config := cfg.ResetTestRoot("block_sync_reactor_test")
 	defer os.RemoveAll(config.RootDir)
 
 	maxBlockHeight := int64(48)

internal/blocksync/v2/internal/behavior/reporter_test.go

@@ -4,7 +4,7 @@ import (
 	"sync"
 	"testing"
 
-	bh "github.com/tendermint/tendermint/internal/blockchain/v2/internal/behavior"
+	bh "github.com/tendermint/tendermint/internal/blocksync/v2/internal/behavior"
 	"github.com/tendermint/tendermint/types"
 )
 

internal/blocksync/v2/io.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/gogo/protobuf/proto"
 	"github.com/tendermint/tendermint/internal/p2p"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/state"
 	"github.com/tendermint/tendermint/types"
 )
@@ -42,7 +42,7 @@ const (
 )
 
 type consensusReactor interface {
-	// for when we switch from blockchain reactor and fast sync to
+	// for when we switch from blockchain reactor and block sync to
 	// the consensus machine
 	SwitchToConsensus(state state.State, skipWAL bool)
 }

internal/blocksync/v2/reactor.go

@@ -7,14 +7,14 @@ import (
 
 	proto "github.com/gogo/protobuf/proto"
 
-	bc "github.com/tendermint/tendermint/internal/blockchain"
-	"github.com/tendermint/tendermint/internal/blockchain/v2/internal/behavior"
+	bc "github.com/tendermint/tendermint/internal/blocksync"
+	"github.com/tendermint/tendermint/internal/blocksync/v2/internal/behavior"
 	cons "github.com/tendermint/tendermint/internal/consensus"
 	tmsync "github.com/tendermint/tendermint/internal/libs/sync"
 	"github.com/tendermint/tendermint/internal/p2p"
 	"github.com/tendermint/tendermint/libs/log"
 	"github.com/tendermint/tendermint/libs/sync"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/state"
 	"github.com/tendermint/tendermint/types"
 )
@@ -31,12 +31,12 @@ type blockStore interface {
 	Height() int64
 }
 
-// BlockchainReactor handles fast sync protocol.
+// BlockchainReactor handles block sync protocol.
 type BlockchainReactor struct {
 	p2p.BaseReactor
 
-	fastSync    *sync.AtomicBool // enable fast sync on start when it's been Set
-	stateSynced bool             // set to true when SwitchToFastSync is called by state sync
+	blockSync   *sync.AtomicBool // enable block sync on start when it's been Set
+	stateSynced bool             // set to true when SwitchToBlockSync is called by state sync
 	scheduler   *Routine
 	processor   *Routine
 	logger      log.Logger
@@ -44,7 +44,7 @@ type BlockchainReactor struct {
 	mtx           tmsync.RWMutex
 	maxPeerHeight int64
 	syncHeight    int64
-	events        chan Event // non-nil during a fast sync
+	events        chan Event // non-nil during a block sync
 
 	reporter behavior.Reporter
 	io       iIO
@@ -61,7 +61,7 @@ type blockApplier interface {
 
 // XXX: unify naming in this package around tmState
 func newReactor(state state.State, store blockStore, reporter behavior.Reporter,
-	blockApplier blockApplier, fastSync bool, metrics *cons.Metrics) *BlockchainReactor {
+	blockApplier blockApplier, blockSync bool, metrics *cons.Metrics) *BlockchainReactor {
 	initHeight := state.LastBlockHeight + 1
 	if initHeight == 1 {
 		initHeight = state.InitialHeight
@@ -78,7 +78,7 @@ func newReactor(state state.State, store blockStore, reporter behavior.Reporter,
 		store:           store,
 		reporter:        reporter,
 		logger:          log.NewNopLogger(),
-		fastSync:        sync.NewBool(fastSync),
+		blockSync:       sync.NewBool(blockSync),
 		syncStartHeight: initHeight,
 		syncStartTime:   time.Time{},
 		lastSyncRate:    0,
@@ -90,10 +90,10 @@ func NewBlockchainReactor(
 	state state.State,
 	blockApplier blockApplier,
 	store blockStore,
-	fastSync bool,
+	blockSync bool,
 	metrics *cons.Metrics) *BlockchainReactor {
 	reporter := behavior.NewMockReporter()
-	return newReactor(state, store, reporter, blockApplier, fastSync, metrics)
+	return newReactor(state, store, reporter, blockApplier, blockSync, metrics)
 }
 
 // SetSwitch implements Reactor interface.
@@ -137,22 +137,22 @@ func (r *BlockchainReactor) SetLogger(logger log.Logger) {
 // Start implements cmn.Service interface
 func (r *BlockchainReactor) Start() error {
 	r.reporter = behavior.NewSwitchReporter(r.BaseReactor.Switch)
-	if r.fastSync.IsSet() {
+	if r.blockSync.IsSet() {
 		err := r.startSync(nil)
 		if err != nil {
-			return fmt.Errorf("failed to start fast sync: %w", err)
+			return fmt.Errorf("failed to start block sync: %w", err)
 		}
 	}
 	return nil
 }
 
-// startSync begins a fast sync, signaled by r.events being non-nil. If state is non-nil,
+// startSync begins a block sync, signaled by r.events being non-nil. If state is non-nil,
 // the scheduler and processor is updated with this state on startup.
 func (r *BlockchainReactor) startSync(state *state.State) error {
 	r.mtx.Lock()
 	defer r.mtx.Unlock()
 	if r.events != nil {
-		return errors.New("fast sync already in progress")
+		return errors.New("block sync already in progress")
 	}
 	r.events = make(chan Event, chBufferSize)
 	go r.scheduler.start()
@@ -167,7 +167,7 @@ func (r *BlockchainReactor) startSync(state *state.State) error {
 	return nil
 }
 
-// endSync ends a fast sync
+// endSync ends a block sync
 func (r *BlockchainReactor) endSync() {
 	r.mtx.Lock()
 	defer r.mtx.Unlock()
@@ -179,8 +179,8 @@ func (r *BlockchainReactor) endSync() {
 	r.processor.stop()
 }
 
-// SwitchToFastSync is called by the state sync reactor when switching to fast sync.
-func (r *BlockchainReactor) SwitchToFastSync(state state.State) error {
+// SwitchToBlockSync is called by the state sync reactor when switching to block sync.
+func (r *BlockchainReactor) SwitchToBlockSync(state state.State) error {
 	r.stateSynced = true
 	state = state.Copy()
 
@@ -434,7 +434,7 @@ func (r *BlockchainReactor) demux(events <-chan Event) {
 					} else {
 						r.lastSyncRate = 0.9*r.lastSyncRate + 0.1*newSyncRate
 					}
-					r.logger.Info("Fast Sync Rate", "height", r.syncHeight,
+					r.logger.Info("block sync Rate", "height", r.syncHeight,
 						"max_peer_height", r.maxPeerHeight, "blocks/s", r.lastSyncRate)
 					lastHundred = time.Now()
 				}
@@ -442,12 +442,12 @@ func (r *BlockchainReactor) demux(events <-chan Event) {
 			case pcBlockVerificationFailure:
 				r.scheduler.send(event)
 			case pcFinished:
-				r.logger.Info("Fast sync complete, switching to consensus")
+				r.logger.Info("block sync complete, switching to consensus")
 				if !r.io.trySwitchToConsensus(event.tmState, event.blocksSynced > 0 || r.stateSynced) {
 					r.logger.Error("Failed to switch to consensus reactor")
 				}
 				r.endSync()
-				r.fastSync.UnSet()
+				r.blockSync.UnSet()
 				return
 			case noOpEvent:
 			default:
@@ -617,14 +617,14 @@ func (r *BlockchainReactor) GetMaxPeerBlockHeight() int64 {
 }
 
 func (r *BlockchainReactor) GetTotalSyncedTime() time.Duration {
-	if !r.fastSync.IsSet() || r.syncStartTime.IsZero() {
+	if !r.blockSync.IsSet() || r.syncStartTime.IsZero() {
 		return time.Duration(0)
 	}
 	return time.Since(r.syncStartTime)
 }
 
 func (r *BlockchainReactor) GetRemainingSyncTime() time.Duration {
-	if !r.fastSync.IsSet() {
+	if !r.blockSync.IsSet() {
 		return time.Duration(0)
 	}
 

internal/blocksync/v2/reactor_test.go

@@ -15,7 +15,7 @@ import (
 
 	abci "github.com/tendermint/tendermint/abci/types"
 	cfg "github.com/tendermint/tendermint/config"
-	"github.com/tendermint/tendermint/internal/blockchain/v2/internal/behavior"
+	"github.com/tendermint/tendermint/internal/blocksync/v2/internal/behavior"
 	cons "github.com/tendermint/tendermint/internal/consensus"
 	"github.com/tendermint/tendermint/internal/mempool/mock"
 	"github.com/tendermint/tendermint/internal/p2p"
@@ -23,7 +23,7 @@ import (
 	"github.com/tendermint/tendermint/internal/test/factory"
 	"github.com/tendermint/tendermint/libs/log"
 	"github.com/tendermint/tendermint/libs/service"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/proxy"
 	sm "github.com/tendermint/tendermint/state"
 	sf "github.com/tendermint/tendermint/state/test/factory"

internal/blocksync/v2/scheduler.go

@@ -163,7 +163,7 @@ type scheduler struct {
 	height int64
 
 	// lastAdvance tracks the last time a block execution happened.
-	// syncTimeout is the maximum time the scheduler waits to advance in the fast sync process before finishing.
+	// syncTimeout is the maximum time the scheduler waits to advance in the block sync process before finishing.
 	// This covers the cases where there are no peers or all peers have a lower height.
 	lastAdvance time.Time
 	syncTimeout time.Duration

internal/consensus/byzantine_test.go

@@ -168,6 +168,7 @@ func TestByzantinePrevoteEquivocation(t *testing.T) {
 		require.NotNil(t, lazyNodeState.privValidator)
 
 		var commit *types.Commit
+		var votes []*types.Vote
 		switch {
 		case lazyNodeState.Height == lazyNodeState.state.InitialHeight:
 			// We're creating a proposal for the first block.
@@ -176,6 +177,7 @@ func TestByzantinePrevoteEquivocation(t *testing.T) {
 		case lazyNodeState.LastCommit.HasTwoThirdsMajority():
 			// Make the commit from LastCommit
 			commit = lazyNodeState.LastCommit.MakeCommit()
+			votes = lazyNodeState.LastCommit.GetVotes()
 		default: // This shouldn't happen.
 			lazyNodeState.Logger.Error("enterPropose: Cannot propose anything: No commit for the previous block")
 			return
@@ -193,7 +195,7 @@ func TestByzantinePrevoteEquivocation(t *testing.T) {
 		proposerAddr := lazyNodeState.privValidatorPubKey.Address()
 
 		block, blockParts := lazyNodeState.blockExec.CreateProposalBlock(
-			lazyNodeState.Height, lazyNodeState.state, commit, proposerAddr,
+			lazyNodeState.Height, lazyNodeState.state, commit, proposerAddr, votes,
 		)
 
 		// Flush the WAL. Otherwise, we may not recompute the same proposal to sign,

internal/consensus/common_test.go

@@ -88,6 +88,7 @@ type validatorStub struct {
 	Round  int32
 	types.PrivValidator
 	VotingPower int64
+	lastVote    *types.Vote
 }
 
 const testMinPower int64 = 10
@@ -119,10 +120,21 @@ func (vs *validatorStub) signVote(
 		Timestamp:        tmtime.Now(),
 		Type:             voteType,
 		BlockID:          types.BlockID{Hash: hash, PartSetHeader: header},
+		VoteExtension:    types.VoteExtensionFromProto(kvstore.ConstructVoteExtension(pubKey.Address())),
 	}
 	v := vote.ToProto()
-	err = vs.PrivValidator.SignVote(context.Background(), config.ChainID(), v)
+	if err := vs.PrivValidator.SignVote(context.Background(), config.ChainID(), v); err != nil {
+		return nil, fmt.Errorf("sign vote failed: %w", err)
+	}
+
+	// ref: signVote in FilePV, the vote should use the privious vote info when the sign data is the same.
+	if signDataIsEqual(vs.lastVote, v) {
+		v.Signature = vs.lastVote.Signature
+		v.Timestamp = vs.lastVote.Timestamp
+	}
+
 	vote.Signature = v.Signature
+	vote.Timestamp = v.Timestamp
 
 	return vote, err
 }
@@ -139,6 +151,13 @@ func signVote(
 	if err != nil {
 		panic(fmt.Errorf("failed to sign vote: %v", err))
 	}
+
+	// TODO: remove hardcoded vote extension.
+	// currently set for abci/examples/kvstore/persistent_kvstore.go
+	v.VoteExtension = types.VoteExtensionFromProto(kvstore.ConstructVoteExtension(v.ValidatorAddress))
+
+	vs.lastVote = v
+
 	return v
 }
 
@@ -876,3 +895,16 @@ func newKVStore() abci.Application {
 func newPersistentKVStoreWithPath(dbDir string) abci.Application {
 	return kvstore.NewPersistentKVStoreApplication(dbDir)
 }
+
+func signDataIsEqual(v1 *types.Vote, v2 *tmproto.Vote) bool {
+	if v1 == nil || v2 == nil {
+		return false
+	}
+
+	return v1.Type == v2.Type &&
+		bytes.Equal(v1.BlockID.Hash, v2.BlockID.GetHash()) &&
+		v1.Height == v2.GetHeight() &&
+		v1.Round == v2.Round &&
+		bytes.Equal(v1.ValidatorAddress.Bytes(), v2.GetValidatorAddress()) &&
+		v1.ValidatorIndex == v2.GetValidatorIndex()
+}

internal/consensus/mempool_test.go

@@ -270,3 +270,8 @@ func (app *CounterApplication) Commit() abci.ResponseCommit {
 	binary.BigEndian.PutUint64(hash, uint64(app.txCount))
 	return abci.ResponseCommit{Data: hash}
 }
+
+func (app *CounterApplication) PrepareProposal(
+	req abci.RequestPrepareProposal) abci.ResponsePrepareProposal {
+	return abci.ResponsePrepareProposal{BlockData: req.BlockData}
+}

internal/consensus/metrics.go

@@ -54,8 +54,8 @@ type Metrics struct {
 	TotalTxs metrics.Gauge
 	// The latest block height.
 	CommittedHeight metrics.Gauge
-	// Whether or not a node is fast syncing. 1 if yes, 0 if no.
-	FastSyncing metrics.Gauge
+	// Whether or not a node is block syncing. 1 if yes, 0 if no.
+	BlockSyncing metrics.Gauge
 	// Whether or not a node is state syncing. 1 if yes, 0 if no.
 	StateSyncing metrics.Gauge
 
@@ -169,11 +169,11 @@ func PrometheusMetrics(namespace string, labelsAndValues ...string) *Metrics {
 			Name:      "latest_block_height",
 			Help:      "The latest block height.",
 		}, labels).With(labelsAndValues...),
-		FastSyncing: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+		BlockSyncing: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
 			Namespace: namespace,
 			Subsystem: MetricsSubsystem,
-			Name:      "fast_syncing",
-			Help:      "Whether or not a node is fast syncing. 1 if yes, 0 if no.",
+			Name:      "block_syncing",
+			Help:      "Whether or not a node is block syncing. 1 if yes, 0 if no.",
 		}, labels).With(labelsAndValues...),
 		StateSyncing: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
 			Namespace: namespace,
@@ -214,7 +214,7 @@ func NopMetrics() *Metrics {
 		BlockSizeBytes:  discard.NewHistogram(),
 		TotalTxs:        discard.NewGauge(),
 		CommittedHeight: discard.NewGauge(),
-		FastSyncing:     discard.NewGauge(),
+		BlockSyncing:    discard.NewGauge(),
 		StateSyncing:    discard.NewGauge(),
 		BlockParts:      discard.NewCounter(),
 	}

internal/consensus/mocks/cons_sync_reactor.go

@@ -1,4 +1,4 @@
-// Code generated by mockery 2.7.5. DO NOT EDIT.
+// Code generated by mockery. DO NOT EDIT.
 
 package mocks
 
@@ -12,8 +12,8 @@ type ConsSyncReactor struct {
 	mock.Mock
 }
 
-// SetFastSyncingMetrics provides a mock function with given fields: _a0
-func (_m *ConsSyncReactor) SetFastSyncingMetrics(_a0 float64) {
+// SetBlockSyncingMetrics provides a mock function with given fields: _a0
+func (_m *ConsSyncReactor) SetBlockSyncingMetrics(_a0 float64) {
 	_m.Called(_a0)
 }
 

internal/consensus/mocks/fast_sync_reactor.go

@@ -9,13 +9,13 @@ import (
 	time "time"
 )
 
-// FastSyncReactor is an autogenerated mock type for the FastSyncReactor type
-type FastSyncReactor struct {
+// BlockSyncReactor is an autogenerated mock type for the BlockSyncReactor type
+type BlockSyncReactor struct {
 	mock.Mock
 }
 
 // GetMaxPeerBlockHeight provides a mock function with given fields:
-func (_m *FastSyncReactor) GetMaxPeerBlockHeight() int64 {
+func (_m *BlockSyncReactor) GetMaxPeerBlockHeight() int64 {
 	ret := _m.Called()
 
 	var r0 int64
@@ -29,7 +29,7 @@ func (_m *FastSyncReactor) GetMaxPeerBlockHeight() int64 {
 }
 
 // GetRemainingSyncTime provides a mock function with given fields:
-func (_m *FastSyncReactor) GetRemainingSyncTime() time.Duration {
+func (_m *BlockSyncReactor) GetRemainingSyncTime() time.Duration {
 	ret := _m.Called()
 
 	var r0 time.Duration
@@ -43,7 +43,7 @@ func (_m *FastSyncReactor) GetRemainingSyncTime() time.Duration {
 }
 
 // GetTotalSyncedTime provides a mock function with given fields:
-func (_m *FastSyncReactor) GetTotalSyncedTime() time.Duration {
+func (_m *BlockSyncReactor) GetTotalSyncedTime() time.Duration {
 	ret := _m.Called()
 
 	var r0 time.Duration
@@ -56,8 +56,8 @@ func (_m *FastSyncReactor) GetTotalSyncedTime() time.Duration {
 	return r0
 }
 
-// SwitchToFastSync provides a mock function with given fields: _a0
-func (_m *FastSyncReactor) SwitchToFastSync(_a0 state.State) error {
+// SwitchToBlockSync provides a mock function with given fields: _a0
+func (_m *BlockSyncReactor) SwitchToBlockSync(_a0 state.State) error {
 	ret := _m.Called(_a0)
 
 	var r0 error