tendermint/CHANGELOG.md

Changelog

0.9.0 (March 6, 2017)

BREAKING CHANGES:

• Update ABCI to v0.4.0, where Query is now Query(RequestQuery) ResponseQuery, enabling precise proofs at particular heights:

message RequestQuery{
	bytes data = 1;
	string path = 2;
	uint64 height = 3;
	bool prove = 4; 
}

message ResponseQuery{
	CodeType          code        = 1;
	int64             index       = 2;
	bytes             key         = 3;
	bytes             value       = 4;
	bytes             proof       = 5;
	uint64            height      = 6;
	string            log         = 7;
}

• BlockMeta data type unifies its Hash and PartSetHash under a BlockID:

type BlockMeta struct {
	BlockID BlockID `json:"block_id"` // the block hash and partsethash
	Header  *Header `json:"header"`   // The block's Header
}

• tendermint gen_validator command output is now pure JSON
• ValidatorSet data type:
  • expose a Proposer field. Note this means the Proposer is persisted with the State.
  • change .Proposer() to .GetProposer()

FEATURES:

• New RPC endpoint /commit?height=X returns header and commit for block at height X
• Client API for each endpoint, including mocks for testing

IMPROVEMENTS:

• Node is now a BaseService
• Simplified starting Tendermint in-process from another application
• Better organized Makefile
• Scripts for auto-building binaries across platforms
• Docker image improved, slimmed down (using Alpine), and changed from tendermint/tmbase to tendermint/tendermint
• New repo files: CONTRIBUTING.md, Github ISSUE_TEMPLATE, CHANGELOG.md
• Improvements on CircleCI for managing build/test artifacts
• Handshake replay is doen through the consensus package, possibly using a mockApp
• Graceful shutdown of RPC listeners
• Tests for the PEX reactor and DialSeeds

BUG FIXES:

• Check peer.Send for failure before updating PeerState in consensus
• Fix panic in /dial_seeds with invalid addresses
• Fix proposer selection logic in ValidatorSet by taking the address into account in the accumComparable
• Fix inconcistencies with ValidatorSet.Proposer across restarts by persisting it in the State

0.8.0 (January 13, 2017)

BREAKING CHANGES:

• New data type BlockID to represent blocks:

type BlockID struct {
	Hash        []byte        `json:"hash"`
	PartsHeader PartSetHeader `json:"parts"`
}

• Vote data type now includes validator address and index:

type Vote struct {
	ValidatorAddress []byte           `json:"validator_address"`
	ValidatorIndex   int              `json:"validator_index"`
	Height           int              `json:"height"`
	Round            int              `json:"round"`
	Type             byte             `json:"type"`
	BlockID          BlockID          `json:"block_id"` // zero if vote is nil.
	Signature        crypto.Signature `json:"signature"`
}

• Update TMSP to v0.3.0, where it is now called ABCI and AppendTx is DeliverTx
• Hex strings in the RPC are now "0x" prefixed

FEATURES:

• New message type on the ConsensusReactor, Maj23Msg, for peers to alert others they've seen a Maj23, in order to track and handle conflicting votes intelligently to prevent Byzantine faults from causing halts:

type VoteSetMaj23Message struct {
	Height  int
	Round   int
	Type    byte
	BlockID types.BlockID
}

• Configurable block part set size
• Validator set changes
• Optionally skip TimeoutCommit if we have all the votes
• Handshake between Tendermint and App on startup to sync latest state and ensure consistent recovery from crashes
• GRPC server for BroadcastTx endpoint

IMPROVEMENTS:

• Less verbose logging
• Better test coverage (37% -> 49%)
• Canonical SignBytes for signable types
• Write-Ahead Log for Mempool and Consensus via go-autofile
• Better in-process testing for the consensus reactor and byzantine faults
• Better crash/restart testing for individual nodes at preset failure points, and of networks at arbitrary points
• Better abstraction over timeout mechanics

BUG FIXES:

• Fix memory leak in mempool peer
• Fix panic on POLRound=-1
• Actually set the CommitTime
• Actually send BeginBlock message
• Fix a liveness issues caused by Byzantine proposals/votes. Uses the new Maj23Msg.

0.7.4 (December 14, 2016)

FEATURES:

• Enable the Peer Exchange reactor with the --pex flag for more resilient gossip network (feature still in development, beware dragons)

IMPROVEMENTS:

• Remove restrictions on RPC endpoint /dial_seeds to enable manual network configuration

0.7.3 (October 20, 2016)

IMPROVEMENTS:

• Type safe FireEvent
• More WAL/replay tests
• Cleanup some docs

BUG FIXES:

• Fix deadlock in mempool for synchronous apps
• Replay handles non-empty blocks
• Fix race condition in HeightVoteSet

0.7.2 (September 11, 2016)

BUG FIXES:

• Set mustConnect=false so tendermint will retry connecting to the app

0.7.1 (September 10, 2016)

FEATURES:

• New TMSP connection for Query/Info
• New RPC endpoints:
  • tmsp_query
  • tmsp_info
• Allow application to filter peers through Query (off by default)

IMPROVEMENTS:

• TMSP connection type enforced at compile time
• All listen/client urls use a "tcp://" or "unix://" prefix

BUG FIXES:

• Save LastSignature/LastSignBytes to priv_validator.json for recovery
• Fix event unsubscribe
• Fix fastsync/blockchain reactor

0.7.0 (August 7, 2016)

BREAKING CHANGES:

• Strict SemVer starting now!
• Update to ABCI v0.2.0
• Validation types now called Commit
• NewBlock event only returns the block header

FEATURES:

• TMSP and RPC support TCP and UNIX sockets
• Addition config options including block size and consensus parameters
• New WAL mode cswal_light; logs only the validator's own votes
• New RPC endpoints:
  • for starting/stopping profilers, and for updating config
  • /broadcast_tx_commit, returns when tx is included in a block, else an error
  • /unsafe_flush_mempool, empties the mempool

IMPROVEMENTS:

• Various optimizations
• Remove bad or invalidated transactions from the mempool cache (allows later duplicates)
• More elaborate testing using CircleCI including benchmarking throughput on 4 digitalocean droplets

BUG FIXES:

• Various fixes to WAL and replay logic
• Various race conditions