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CHANGELOG

v0.38.15

November 6, 2024

This release supersedes v0.38.14, which mistakenly updated the Go version to 1.23, introducing an unintended breaking change. It sets the Go version back to 1.22.7 by reverting #4297.

The release includes the bug fixes, performance improvements, and importantly, the fix for the security vulnerability in the vote extensions (VE) validation logic that were part of v0.38.14. For more details, please refer to ASA-2024-011.

v0.38.14

November 6, 2024

This release fixes a security vulnerability in the vote extensions (VE) validation logic. For more details, please refer to ASA-2024-011.

We recommend upgrading ASAP if you’re using vote extensions (VE).

BUG FIXES

  • [consensus] Do not panic if the validator index of a Vote message is out of bounds, when vote extensions are enabled (#ABC-0021)

DEPENDENCIES

  • Bump cometbft-db version to v0.15.0 (#4297)
  • [go/runtime] Bump Go version to 1.23 (#4297)

IMPROVEMENTS

  • [p2p] fix exponential backoff logic to increase reconnect retries close to 24 hours (#3519)

v0.38.13

October 24, 2024

This patch release addresses the issue where tx_search was not returning all results, which only arises when upgrading to CometBFT-DB version 0.13 or later. It includes a fix in the state indexer to resolve this problem. We recommend upgrading to this patch release if you are affected by this issue.

BUG FIXES

  • [metrics] Call unused rejected_txs metric in mempool (#4019)
  • [state/indexer] Fix the tx_search results not returning all results by changing the logic in the indexer to copy the key and values instead of reusing an iterator. This issue only arises when upgrading to cometbft-db v0.13 or later. (#4295). Special thanks to @faddat for reporting the issue.

DEPENDENCIES

  • [go/runtime] Bump Go version to 1.22 (#4073)
  • Bump cometbft-db version to v0.14.1 (#4321)

FEATURES

  • [crypto] use decred secp256k1 directly (#4294)

IMPROVEMENTS

  • [metrics] Add evicted_txs metric to mempool (#4019)
  • [log] Change "mempool is full" log to debug level (#4123) Special thanks to @yihuang.

v0.38.12

September 3, 2024

This release includes a security fix for the light client and is recommended for all users.

BUG FIXES

  • [light] Cross-check proposer priorities in retrieved validator sets (#ASA-2024-009)
  • [privval] Ignore duplicate privval listen when already connected (#3828

DEPENDENCIES

  • [crypto/secp256k1] Adjust to breaking interface changes in btcec/v2 latest release, while avoiding breaking changes to local CometBFT functions (#3728)

IMPROVEMENTS

  • [types] Check that proposer is one of the validators in ValidateBasic (#ASA-2024-009)
  • [e2e] Add log_level option to manifest file (#3819).
  • [e2e] Add log_format option to manifest file (#3836).

v0.38.11

August 12, 2024

This release fixes a panic in consensus where CometBFT would previously panic if there's no extension signature in non-nil Precommit EVEN IF vote extensions themselves are disabled.

It also includes a few other bug fixes and performance improvements.

BUG FIXES

  • [types] Only check IFF vote is a non-nil Precommit if extensionsEnabled types (#3565)

IMPROVEMENTS

  • [indexer] Fixed ineffective select break statements; they now point to their enclosing for loop label to exit (#3544)

v0.38.10

July 16, 2024

This release fixes a bug in v0.38.x that prevented ABCI responses from being correctly read when upgrading from v0.37.x or below. It also includes a few other bug fixes and performance improvements.

BUG FIXES

  • [p2p] Node respects configured max_num_outbound_peers limit when dialing peers provided by a seed node (#486)
  • [rpc] Fix an issue where a legacy ABCI response, created on v0.37 or before, is not returned properly in v0.38 and up on the /block_results RPC endpoint. (#3002)
  • [blocksync] Do not stay in blocksync if the node's validator voting power is high enough to block the chain while it is not online (#3406)

IMPROVEMENTS

  • [p2p/conn] Update send monitor, used for sending rate limiting, once per batch of packets sent (#3382)
  • [libs/pubsub] Allow dash (-) in event tags (#3401)
  • [p2p/conn] Remove the usage of a synchronous pool of buffers in secret connection, storing instead the buffer in the connection struct. This reduces the synchronization primitive usage, speeding up the code. (#3403)

v0.38.9

July 1, 2024

This release reverts the API-breaking change to the Mempool interface introduced in the last patch release (v0.38.8) while still keeping the performance improvement added to the mempool. It also includes a minor fix to the RPC endpoints /tx and /tx_search.

BREAKING CHANGES

  • [mempool] Revert adding the method PreUpdate() to the Mempool interface, recently introduced in the previous patch release (v0.38.8). Its logic is now moved into the Lock method. With this change, the Mempool interface is the same as in v0.38.7. (#3361)

BUG FIXES

  • [rpc] Fix nil pointer error in /tx and /tx_search when block is absent (#3352)

v0.38.8

June 27, 2024

This release contains a few bug fixes and performance improvements.

BREAKING CHANGES

  • [mempool] Add to the Mempool interface a new method PreUpdate(). This method should be called before acquiring the mempool lock, to signal that a new update is coming. Also add to ErrMempoolIsFull a new field RecheckFull. (#3314)

BUG FIXES

  • [blockstore] Added peer banning in blockstore (#ABC-0013)
  • [blockstore] Send correct error message when vote extensions do not align with received packet (#ABC-0014)
  • [mempool] Fix data race when rechecking with async ABCI client (#1827)
  • [consensus] Fix a race condition in the consensus timeout ticker. Race is caused by two timeouts being scheduled at the same time. (#3092)
  • [types] Do not batch verify a commit if the validator set keys have different types. (#3195

IMPROVEMENTS

  • [config] Added recheck_timeout mempool parameter to set how much time to wait for recheck responses from the app (only applies to non-local ABCI clients). (#1827)
  • [rpc] Add a configurable maximum batch size for RPC requests. (#2867).
  • [event-bus] Remove the debug logs in PublishEventTx, which were noticed production slowdowns. (#2911)
  • [state/execution] Cache the block hash computation inside of the Block Type, so we only compute it once. (#2924)
  • [consensus/state] Remove a redundant VerifyBlock call in FinalizeCommit (#2928)
  • [p2p/channel] Speedup ProtoIO writer creation time, and thereby speedup channel writing by 5%. (#2949)
  • [p2p/conn] Minor speedup (3%) to connection.WritePacketMsgTo, by removing MinInt calls. (#2952)
  • [internal/bits] 10x speedup creating initialized bitArrays, which speedsup extendedCommit.BitArray(). This is used in consensus vote gossip. (#2959).
  • [blockstore] Remove a redundant Header.ValidateBasic call in LoadBlockMeta, 75% reducing this time. (#2964)
  • [p2p/conn] Speedup connection.WritePacketMsgTo, by reusing internal buffers rather than re-allocating. (#2986)
  • [blockstore] Use LRU caches in blockstore, significiantly improving consensus gossip routine performance (#3003
  • [consensus] Improve performance of consensus metrics by lowering string operations (#3017
  • [protoio] Remove one allocation and new object call from ReadMsg, leading to a 4% p2p message reading performance gain. (#3018
  • [mempool] Before updating the mempool, consider it as full if rechecking is still in progress. This will stop accepting transactions in the mempool if the node can't keep up with re-CheckTx. (#3314)

v0.38.7

April 26, 2024

This release contains a few bug fixes and performance improvements.

BUG FIXES

  • [mempool] Panic when a CheckTx request to the app returns an error (#2225)
  • [bits] prevent BitArray.UnmarshalJSON from crashing on 0 bits (#2774)

FEATURES

  • [node] Add BootstrapStateWithGenProvider to boostrap state using a custom genesis doc provider (#2793)

IMPROVEMENTS

  • [state/indexer] Lower the heap allocation of transaction searches (#2839)
  • [internal/bits] 10x speedup and remove heap overhead of bitArray.PickRandom (used extensively in consensus gossip) (#2841).
  • [libs/json] Lower the memory overhead of JSON encoding by using JSON encoders internally (#2846).

v0.38.6

March 12, 2024

This release fixes a security bug in the light client. It also introduces many improvements to the block sync in collaboration with the Osmosis team.

BUG FIXES

  • [privval] Retry accepting a connection (#2047)
  • [state] Fix rollback to a specific height (#2136)

FEATURES

  • [e2e] Add block_max_bytes option to the manifest file. (#2362)

IMPROVEMENTS

  • [blocksync] Avoid double-calling types.BlockFromProto for performance reasons (#2016)
  • [e2e] Add manifest option load_max_txs to limit the number of transactions generated by the load command. (#2094)
  • [jsonrpc] enable HTTP basic auth in websocket client (#2434)
  • [blocksync] make the max number of downloaded blocks dynamic. Previously it was a const 600. Now it's peersCount * maxPendingRequestsPerPeer (20) #2467
  • [blocksync] Request a block from peer B if we are approaching pool's height (less than 50 blocks) and the current peer A is slow in sending us the block #2475
  • [blocksync] Request the block N from peer B immediately after getting NoBlockResponse from peer A #2475
  • [blocksync] Sort peers by download rate (the fastest peer is picked first) #2475

v0.38.5

January 24, 2024

This release fixes a problem introduced in v0.38.3: if an application updates the value of ConsensusParam VoteExtensionsEnableHeight to the same value (actually a "noop" update) this is accepted in v0.38.2 but rejected under some conditions in v0.38.3 and v0.38.4. Even if rejecting a useless update would make sense in general, in a point release we should not reject a set of inputs to a function that was previuosly accepted (unless there is a good reason for it). The goal of this release is to accept again all "noop" updates, like v0.38.2 did.

IMPROVEMENTS

  • [consensus] Add chain_size_bytes metric for measuring the size of the blockchain in bytes (#2093)

v0.38.4

January 22, 2024

This release is aimed at those projects that have a dependency on CometBFT, release line v0.38.x, and make use of function SaveBlockStoreState in package github.com/cometbft/cometbft/store. This function changed its signature in v0.38.3. This new release reverts the signature change so that upgrading to the latest release of CometBFT on v0.38.x does not require any change in the code depending on CometBFT.

IMPROVEMENTS

  • [e2e] Add manifest option VoteExtensionsUpdateHeight to test vote extension activation via InitChain and FinalizeBlock. Also, extend the manifest generator to produce different values of this new option (#2065)

v0.38.3

January 17, 2024

This release addresses a high impact security issue reported in advisory (ASA-2024-001). There are other non-security bugs fixes that have been addressed since v0.38.2 was released, as well as some improvements. Please check the list below for further details.

BUG FIXES

  • [consensus] Fix for "Validation of VoteExtensionsEnableHeight can cause chain halt" (ASA-2024-001)
  • [mempool] Fix data races in CListMempool by making atomic the types of height, txsBytes, and notifiedTxsAvailable. (#642)
  • [mempool] The calculation method of tx size returned by calling proxyapp should be consistent with that of mempool (#1687)
  • [evidence] When VerifyCommitLight & VerifyCommitLightTrusting are called as part of evidence verification, all signatures present in the evidence must be verified (#1749)
  • [crypto] SupportsBatchVerifier returns false if public key is nil instead of dereferencing nil. (#1825)
  • [blocksync] wait for poolRoutine to stop in (*Reactor).OnStop (#1879)

IMPROVEMENTS

  • [types] Validate Validator#Address in ValidateBasic (#1715)
  • [abci] Increase ABCI socket message size limit to 2GB (#1730: @troykessler)
  • [state] Save the state using a single DB batch (#1735)
  • [store] Save block using a single DB batch if block is less than 640kB, otherwise each block part is saved individually (#1755)
  • [rpc] Support setting proxy from env to DefaultHttpClient. (#1900)
  • [rpc] Use default port for HTTP(S) URLs when there is no explicit port (#1903)
  • [crypto/merkle] faster calculation of hashes (#1921)

v0.38.2

November 27, 2023

This release provides the nop mempool for applications that want to build their own mempool. Using this mempool effectively disables all mempool functionality in CometBFT, including transaction dissemination and the broadcast_tx_* endpoints.

Also fixes a small bug in the mempool for an experimental feature.

BUG FIXES

  • [mempool] Avoid infinite wait in transaction sending routine when using experimental parameters to limiting transaction gossiping to peers (#1654)

FEATURES

  • [mempool] Add nop mempool (#1643)

    If you want to use it, change mempool's type to nop:

    [mempool]

# The type of mempool for this node to use.
#
# Possible types:
# - "flood" : concurrent linked list mempool with flooding gossip protocol
# (default)
# - "nop"   : nop-mempool (short for no operation; the ABCI app is responsible
# for storing, disseminating and proposing txs). "create_empty_blocks=false"
# is not supported.
type = "nop"

v0.38.1

November 17, 2023

This release contains, among other things, an opt-in, experimental feature to help reduce the bandwidth consumption associated with the mempool's transaction gossip.

BUG FIXES

  • [state/indexer] Respect both height params while querying for events (#1529)

FEATURES

  • [metrics] Add metric for mempool size in bytes SizeBytes. (#1512)

IMPROVEMENTS

  • [mempool] Add experimental feature to limit the number of persistent peers and non-persistent peers to which the node gossip transactions. (#1558) (#1584)
  • [config] Add mempool parameters experimental_max_gossip_connections_to_persistent_peers and experimental_max_gossip_connections_to_non_persistent_peers for limiting the number of peers to which the node gossip transactions. (#1558) (#1584)

v0.38.0

September 12, 2023

This release includes the second part of ABCI++, called ABCI 2.0. ABCI 2.0 introduces ABCI methods ExtendVote and VerifyVoteExtension. These new methods allow the application to add data (opaque to CometBFT), called vote extensions to precommit votes sent by validators. These vote extensions are made available to the proposer(s) of the next height. Additionally, ABCI 2.0 coalesces BeginBlock, DeliverTx, and EndBlock into one method, FinalizeBlock, whose Request* and Response* data structures contain the sum of all data previously contained in the respective Request* and Response* data structures in BeginBlock, DeliverTx, and EndBlock. See the specification for more details on ABCI 2.0.

BREAKING CHANGES

  • [mempool] Remove priority mempool. (#260)
  • [config] Remove Version field from MempoolConfig. (#260)
  • [protobuf] Remove fields sender, priority, and mempool_error from ResponseCheckTx. (#260)
  • [crypto/merkle] Do not allow verification of Merkle Proofs against empty trees (nil root). Proof.ComputeRootHash now panics when it encounters an error, but Proof.Verify does not panic (#558)
  • [state/kvindexer] Remove the function type from the event key stored in the database. This should be breaking only for people who forked CometBFT and interact directly with the indexers kvstore. (#774)
  • [rpc] Removed begin_block_events and end_block_events from BlockResultsResponse. The events are merged into one field called finalize_block_events. (#9427)
  • [pubsub] Added support for big integers and big floats in the pubsub event query system. Breaking changes: function Number in package libs/pubsub/query/syntax changed its return value. (#797)
  • [kvindexer] Added support for big integers and big floats in the kvindexer. Breaking changes: function Number in package libs/pubsub/query/syntax changed its return value. (#797)
  • [mempool] Application can now set ConsensusParams.Block.MaxBytes to -1 to have visibility on all transactions in the mempool at PrepareProposal time. This means that the total size of transactions sent via RequestPrepareProposal might exceed RequestPrepareProposal.max_tx_bytes. If that is the case, the application MUST make sure that the total size of transactions returned in ResponsePrepareProposal.txs does not exceed RequestPrepareProposal.max_tx_bytes, otherwise CometBFT will panic. (#980)
  • [node/state] Add Go API to bootstrap block store and state store to a height. Make sure block sync starts syncing from bootstrapped height. (#1057) (@yihuang)
  • [state/store] Added Go functions to save height at which offline state sync is performed. (#1057) (@jmalicevic)
  • [p2p] Remove UPnP functionality (#1113)
  • [node] Removed ConsensusState() accessor from Node struct - all access to consensus state should go via the reactor (#1120)
  • [state] Signature of ExtendVote changed in BlockExecutor. It now includes the block whose precommit will be extended, an the state object. (#1270)
  • [state] Move pruneBlocks from node/state to state/execution. (#6541)
  • [abci] Move app_hash parameter from Commit to FinalizeBlock (#8664)
  • [abci] Introduce FinalizeBlock which condenses BeginBlock, DeliverTx and EndBlock into a single method call (#9468)
  • [p2p] Remove unused p2p/trust package (#9625)
  • [rpc] Remove global environment and replace with constructor (#9655)
  • [node] Move DBContext and DBProvider from the node package to the config package. (#9655)
  • [inspect] Add a new inspect command for introspecting the state and block store of a crashed tendermint node. (#9655)
  • [metrics] Move state-syncing and block-syncing metrics to their respective packages. Move labels from block_syncing -> blocksync_syncing and state_syncing -> statesync_syncing (#9682)

BUG FIXES

  • [kvindexer] Forward porting the fixes done to the kvindexer in 0.37 in PR #77 (#423)
  • [consensus] Unexpected error conditions in ApplyBlock are non-recoverable, so ignoring the error and carrying on is a bug. We replaced a return that disregarded the error by a panic. (#496)
  • [consensus] Rename (*PeerState).ToJSON to MarshalJSON to fix a logging data race (#524)
  • [light] Fixed an edge case where a light client would panic when attempting to query a node that (1) has started from a non-zero height and (2) does not yet have any data. The light client will now, correctly, not panic and keep the node in its list of providers in the same way it would if it queried a node starting from height zero that does not yet have data (#575)
  • [abci] Restore the snake_case naming in JSON serialization of ExecTxResult (#855).
  • [consensus] Avoid recursive call after rename to (*PeerState).MarshalJSON (#863)
  • [mempool/clist_mempool] Prevent a transaction to appear twice in the mempool (#890: @otrack)
  • [docker] Ensure Docker image uses consistent version of Go. (#9462)
  • [abci-cli] Fix broken abci-cli help command. (#9717)

DEPRECATIONS

  • [rpc/grpc] Mark the gRPC broadcast API as deprecated. It will be superseded by a broader API as part of #81 (#650)

FEATURES

  • [node/state] Add Go API to bootstrap block store and state store to a height (#1057) (@yihuang)
  • [proxy] Introduce NewConnSyncLocalClientCreator, which allows local ABCI clients to have the same concurrency model as remote clients (i.e. one mutex per client "connection", for each of the four ABCI "connections"). (tendermint/tendermint#9830 and #1145)
  • [proxy] Introduce NewUnsyncLocalClientCreator, which allows local ABCI clients to have the same concurrency model as remote clients (i.e. one mutex per client "connection", for each of the four ABCI "connections"). (#9830)
  • [abci] New ABCI methods VerifyVoteExtension and ExtendVote allow validators to validate the vote extension data attached to a pre-commit message and allow applications to let their validators do more than just validate within consensus (#9836)

IMPROVEMENTS

  • [blocksync] Generate new metrics during BlockSync (#543)
  • [jsonrpc/client] Improve the error message for client errors stemming from bad HTTP responses. (cometbft/cometbft#638)
  • [rpc] Remove response data from response failure logs in order to prevent large quantities of log data from being produced (#654)
  • [pubsub/kvindexer] Numeric query conditions and event values are represented as big floats with default precision of 125. Integers are read as "big ints" and represented with as many bits as they need when converting to floats. (#797)
  • [node] Make handshake cancelable (cometbft/cometbft#857)
  • [consensus] New metrics (counters) to track duplicate votes and block parts. (#896)
  • [mempool] Application can now set ConsensusParams.Block.MaxBytes to -1 to gain more control on the max size of transactions in a block. It also allows the application to have visibility on all transactions in the mempool at PrepareProposal time. (#980)
  • [node] Close evidence.db OnStop (cometbft/cometbft#1210: @chillyvee)
  • [state] Make logging block_app_hash and app_hash consistent by logging them both as hex. (#1264)
  • [crypto/merkle] Improve HashAlternatives performance (#6443)
  • [p2p/pex] Improve addrBook.hash performance (#6509)
  • [crypto/merkle] Improve HashAlternatives performance (#6513)
  • [pubsub] Performance improvements for the event query API (#7319)

v0.37.0

March 6, 2023

This is the first CometBFT release with ABCI 1.0, which introduces the PrepareProposal and ProcessProposal methods, with the aim of expanding the range of use cases that application developers can address. This is the first change to ABCI towards ABCI++, and the full range of ABCI++ functionality will only become available in the next major release with ABCI 2.0. See the specification for more details.

In the v0.34.27 release, the CometBFT Go module is still github.com/tendermint/tendermint to facilitate ease of upgrading for users, but in this release we have changed this to github.com/cometbft/cometbft.

Please also see our upgrading guidelines for more details on upgrading from the v0.34 release series.

Also see our QA results for the v0.37 release.

We'd love your feedback on this release! Please reach out to us via one of our communication channels, such as GitHub Discussions, with any of your questions, comments and/or concerns.

See below for more details.

BREAKING CHANGES

  • The TMHOME environment variable was renamed to CMTHOME, and all environment variables starting with TM_ are instead prefixed with CMT_ (#211)
  • [p2p] Reactor Send, TrySend and Receive renamed to SendEnvelope, TrySendEnvelope and ReceiveEnvelope to allow metrics to be appended to messages and measure bytes sent/received. (#230)
  • Bump minimum Go version to 1.20 (#385)
  • [config] The boolean key fastsync is deprecated and replaced by block_sync. (#9259) At the same time, block_sync is also deprecated. In the next release, BlocSync will always be enabled and block_sync will be removed. (#409)
  • [abci] Make length delimiter encoding consistent (uint64) between ABCI and P2P wire-level protocols (#5783)
  • [abci] Change the key and value fields from []byte to string in the EventAttribute type. (#6403)
  • [abci/counter] Delete counter example app (#6684)
  • [abci] Renamed EvidenceType to MisbehaviorType and Evidence to Misbehavior as a more accurate label of their contents. (#8216)
  • [abci] Added cli commands for PrepareProposal and ProcessProposal. (#8656)
  • [abci] Added cli commands for PrepareProposal and ProcessProposal. (#8901)
  • [abci] Renamed LastCommitInfo to CommitInfo in preparation for vote extensions. (#9122)
  • Change spelling from British English to American. Rename Subscription.Cancelled() to Subscription.Canceled() in libs/pubsub (#9144)
  • [abci] Removes unused Response/Request SetOption from ABCI (#9145)
  • [config] Rename the fastsync section and the fast_sync key blocksync and block_sync respectively (#9259)
  • [types] Reduce the use of protobuf types in core logic. ConsensusParams, BlockParams, ValidatorParams, EvidenceParams, VersionParams have become native types. They still utilize protobuf when being sent over the wire or written to disk. Moved ValidateConsensusParams inside (now native type) ConsensusParams, and renamed it to ValidateBasic. (#9287)
  • [abci/params] Deduplicate ConsensusParams and BlockParams so only types proto definitions are use. Remove TimeIotaMs and use a hard-coded 1 millisecond value to ensure monotonically increasing block times. Rename AppVersion to App so as to not stutter. (#9287)
  • [abci] New ABCI methods PrepareProposal and ProcessProposal which give the app control over transactions proposed and allows for verification of proposed blocks. (#9301)

BUG FIXES

  • [consensus] Fixed a busy loop that happened when sending of a block part failed by sleeping in case of error. (#4)
  • [state/kvindexer] Fixed the default behaviour of the kvindexer to index and query attributes by events in which they occur. In 0.34.25 this was mitigated by a separated RPC flag. @jmalicevic (#77)
  • [state/kvindexer] Resolved crashes when event values contained slashes, introduced after adding event sequences in #77. @jmalicevic (#382)
  • [consensus] (#386) Short-term fix for the case when needProofBlock cannot find previous block meta by defaulting to the creation of a new proof block. (@adizere)
    • Special thanks to the Vega.xyz team, and in particular to Zohar (@ze97286), for reporting the problem and working with us to get to a fix.
  • [docker] enable cross platform build using docker buildx (#9073)
  • [consensus] fix round number of enterPropose when handling RoundStepNewRound timeout. (#9229)
  • [docker] ensure Docker image uses consistent version of Go (#9462)
  • [p2p] prevent peers who have errored from being added to peer_set (#9500)
  • [blocksync] handle the case when the sending queue is full: retry block request after a timeout (#9518)

FEATURES

  • [abci] New ABCI methods PrepareProposal and ProcessProposal which give the app control over transactions proposed and allows for verification of proposed blocks. (#9301)

IMPROVEMENTS

  • [e2e] Add functionality for uncoordinated (minor) upgrades (#56)
  • [tools/tm-signer-harness] Remove the folder as it is unused (#136)
  • [p2p] Reactor Send, TrySend and Receive renamed to SendEnvelope, TrySendEnvelope and ReceiveEnvelope to allow metrics to be appended to messages and measure bytes sent/received. (#230)
  • [abci] Added AbciVersion to RequestInfo allowing applications to check ABCI version when connecting to CometBFT. (#5706)
  • [cli] add --hard flag to rollback command (and a boolean to the RollbackState method). This will rollback state and remove the last block. This command can be triggered multiple times. The application must also rollback state to the same height. (#9171)
  • [crypto] Update to use btcec v2 and the latest btcutil. (#9250)
  • [rpc] Added header and header_by_hash queries to the RPC client (#9276)
  • [proto] Migrate from gogo/protobuf to cosmos/gogoproto (#9356)
  • [rpc] Enable caching of RPC responses (#9650)
  • [consensus] Save peer LastCommit correctly to achieve 50% reduction in gossiped precommits. (#9760)

v0.34.27

Feb 27, 2023

This is the first official release of CometBFT - a fork of Tendermint Core. This particular release is intended to be compatible with the Tendermint Core v0.34 release series.

For details as to how to upgrade to CometBFT from Tendermint Core, please see our upgrading guidelines.

If you have any questions, comments, concerns or feedback on this release, we would love to hear from you! Please contact us via GitHub Discussions, Discord (in the #cometbft channel) or Telegram.

Special thanks to @wcsiu, @ze97286, @faddat and @JayT106 for their contributions to this release!

BREAKING CHANGES

  • Rename binary to cometbft and Docker image to cometbft/cometbft (#152)
  • The TMHOME environment variable was renamed to CMTHOME, and all environment variables starting with TM_ are instead prefixed with CMT_ (#211)
  • Use Go 1.19 to build CometBFT, since Go 1.18 has reached end-of-life. (#360)

BUG FIXES

  • [consensus] Fixed a busy loop that happened when sending of a block part failed by sleeping in case of error. (#4)
  • [state/kvindexer] Resolved crashes when event values contained slashes, introduced after adding event sequences. (#383: @jmalicevic)
  • [consensus] Short-term fix for the case when needProofBlock cannot find previous block meta by defaulting to the creation of a new proof block. (#386: @adizere)
    • Special thanks to the Vega.xyz team, and in particular to Zohar (@ze97286), for reporting the problem and working with us to get to a fix.
  • [p2p] Correctly use non-blocking TrySendEnvelope method when attempting to send messages, as opposed to the blocking SendEnvelope method. It is unclear whether this has a meaningful impact on P2P performance, but this patch does correct the underlying behaviour to what it should be (tendermint/tendermint#9936)

DEPENDENCIES

FEATURES

  • [rpc] Add match_event query parameter to indicate to the RPC that it should match events within attributes, not only within a height (tendermint/tendermint#9759)

IMPROVEMENTS

  • [e2e] Add functionality for uncoordinated (minor) upgrades (#56)
  • [tools/tm-signer-harness] Remove the folder as it is unused (#136)
  • Append the commit hash to the version of CometBFT being built (#204)
  • [mempool/v1] Suppress "rejected bad transaction" in priority mempool logs by reducing log level from info to debug (#314: @JayT106)
  • [consensus] Add consensus_block_gossip_parts_received and consensus_step_duration_seconds metrics in order to aid in investigating the impact of database compaction on consensus performance (tendermint/tendermint#9733)
  • [state/kvindexer] Add match.event keyword to support condition evaluation based on the event the attributes belong to (tendermint/tendermint#9759)
  • [p2p] Reduce log spam through reducing log level of "Dialing peer" and "Added peer" messages from info to debug (tendermint/tendermint#9764: @faddat)
  • [consensus] Reduce bandwidth consumption of consensus votes by roughly 50% through fixing a small logic bug (tendermint/tendermint#9776)

CometBFT is a fork of Tendermint Core as of late December 2022.

Bug bounty

Friendly reminder, we have a bug bounty program.

Previous changes

For changes released before the creation of CometBFT, please refer to the Tendermint Core CHANGELOG.md.