553 lines
22 KiB
Markdown
553 lines
22 KiB
Markdown
# Changelog
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## Roadmap
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BREAKING CHANGES:
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- Upgrade the header to support better proofs on validtors, results, evidence, and possibly more
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- Better support for injecting randomness
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- Pass evidence/voteInfo through ABCI
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- Upgrade consensus for more real-time use of evidence
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FEATURES:
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- Peer reputation management
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- Use the chain as its own CA for nodes and validators
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- Tooling to run multiple blockchains/apps, possibly in a single process
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- State syncing (without transaction replay)
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- Add authentication and rate-limitting to the RPC
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IMPROVEMENTS:
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- Improve subtleties around mempool caching and logic
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- Consensus optimizations:
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- cache block parts for faster agreement after round changes
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- propagate block parts rarest first
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- Better testing of the consensus state machine (ie. use a DSL)
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- Auto compiled serialization/deserialization code instead of go-wire reflection
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BUG FIXES:
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- Graceful handling/recovery for apps that have non-determinism or fail to halt
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- Graceful handling/recovery for violations of safety, or liveness
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## 0.15.0 (TBD)
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BREAKING CHANGES:
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- [p2p] enable the Peer Exchange reactor by default
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- [types] add Timestamp field to Proposal/Vote
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## 0.14.0 (December 11, 2017)
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BREAKING CHANGES:
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- consensus/wal: removed separator
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- rpc/client: changed Subscribe/Unsubscribe/UnsubscribeAll funcs signatures to be identical to event bus.
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FEATURES:
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- new `tendermint lite` command (and `lite/proxy` pkg) for running a light-client RPC proxy.
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NOTE it is currently insecure and its APIs are not yet covered by semver
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IMPROVEMENTS:
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- rpc/client: can act as event bus subscriber (See https://github.com/tendermint/tendermint/issues/945).
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- p2p: use exponential backoff from seconds to hours when attempting to reconnect to persistent peer
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- config: moniker defaults to the machine's hostname instead of "anonymous"
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BUG FIXES:
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- p2p: no longer exit if one of the seed addresses is incorrect
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## 0.13.0 (December 6, 2017)
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BREAKING CHANGES:
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- abci: update to v0.8 using gogo/protobuf; includes tx tags, vote info in RequestBeginBlock, data.Bytes everywhere, use int64, etc.
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- types: block heights are now `int64` everywhere
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- types & node: EventSwitch and EventCache have been replaced by EventBus and EventBuffer; event types have been overhauled
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- node: EventSwitch methods now refer to EventBus
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- rpc/lib/types: RPCResponse is no longer a pointer; WSRPCConnection interface has been modified
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- rpc/client: WaitForOneEvent takes an EventsClient instead of types.EventSwitch
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- rpc/client: Add/RemoveListenerForEvent are now Subscribe/Unsubscribe
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- rpc/core/types: ResultABCIQuery wraps an abci.ResponseQuery
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- rpc: `/subscribe` and `/unsubscribe` take `query` arg instead of `event`
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- rpc: `/status` returns the LatestBlockTime in human readable form instead of in nanoseconds
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- mempool: cached transactions return an error instead of an ABCI response with BadNonce
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FEATURES:
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- rpc: new `/unsubscribe_all` WebSocket RPC endpoint
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- rpc: new `/tx_search` endpoint for filtering transactions by more complex queries
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- p2p/trust: new trust metric for tracking peers. See ADR-006
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- config: TxIndexConfig allows to set what DeliverTx tags to index
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IMPROVEMENTS:
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- New asynchronous events system using `tmlibs/pubsub`
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- logging: Various small improvements
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- consensus: Graceful shutdown when app crashes
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- tests: Fix various non-deterministic errors
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- p2p: more defensive programming
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BUG FIXES:
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- consensus: fix panic where prs.ProposalBlockParts is not initialized
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- p2p: fix panic on bad channel
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## 0.12.1 (November 27, 2017)
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BUG FIXES:
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- upgrade tmlibs dependency to enable Windows builds for Tendermint
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## 0.12.0 (October 27, 2017)
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BREAKING CHANGES:
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- rpc/client: websocket ResultsCh and ErrorsCh unified in ResponsesCh.
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- rpc/client: ABCIQuery no longer takes `prove`
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- state: remove GenesisDoc from state.
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- consensus: new binary WAL format provides efficiency and uses checksums to detect corruption
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- use scripts/wal2json to convert to json for debugging
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FEATURES:
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- new `certifiers` pkg contains the tendermint light-client library (name subject to change)!
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- rpc: `/genesis` includes the `app_options` .
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- rpc: `/abci_query` takes an additional `height` parameter to support historical queries.
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- rpc/client: new ABCIQueryWithOptions supports options like `trusted` (set false to get a proof) and `height` to query a historical height.
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IMPROVEMENTS:
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- rpc: `/genesis` result includes `app_options`
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- rpc/lib/client: add jitter to reconnects.
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- rpc/lib/types: `RPCError` satisfies the `error` interface.
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BUG FIXES:
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- rpc/client: fix ws deadlock after stopping
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- blockchain: fix panic on AddBlock when peer is nil
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- mempool: fix sending on TxsAvailable when a tx has been invalidated
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- consensus: dont run WAL catchup if we fast synced
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## 0.11.1 (October 10, 2017)
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IMPROVEMENTS:
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- blockchain/reactor: respondWithNoResponseMessage for missing height
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BUG FIXES:
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- rpc: fixed client WebSocket timeout
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- rpc: client now resubscribes on reconnection
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- rpc: fix panics on missing params
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- rpc: fix `/dump_consensus_state` to have normal json output (NOTE: technically breaking, but worth a bug fix label)
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- types: fixed out of range error in VoteSet.addVote
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- consensus: fix wal autofile via https://github.com/tendermint/tmlibs/blob/master/CHANGELOG.md#032-october-2-2017
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## 0.11.0 (September 22, 2017)
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BREAKING:
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- genesis file: validator `amount` is now `power`
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- abci: Info, BeginBlock, InitChain all take structs
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- rpc: various changes to match JSONRPC spec (http://www.jsonrpc.org/specification), including breaking ones:
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- requests that previously returned HTTP code 4XX now return 200 with an error code in the JSONRPC.
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- `rpctypes.RPCResponse` uses new `RPCError` type instead of `string`.
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- cmd: if there is no genesis, exit immediately instead of waiting around for one to show.
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- types: `Signer.Sign` returns an error.
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- state: every validator set change is persisted to disk, which required some changes to the `State` structure.
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- p2p: new `p2p.Peer` interface used for all reactor methods (instead of `*p2p.Peer` struct).
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FEATURES:
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- rpc: `/validators?height=X` allows querying of validators at previous heights.
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- rpc: Leaving the `height` param empty for `/block`, `/validators`, and `/commit` will return the value for the latest height.
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IMPROVEMENTS:
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- docs: Moved all docs from the website and tools repo in, converted to `.rst`, and cleaned up for presentation on `tendermint.readthedocs.io`
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BUG FIXES:
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- fix WAL openning issue on Windows
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## 0.10.4 (September 5, 2017)
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IMPROVEMENTS:
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- docs: Added Slate docs to each rpc function (see rpc/core)
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- docs: Ported all website docs to Read The Docs
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- config: expose some p2p params to tweak performance: RecvRate, SendRate, and MaxMsgPacketPayloadSize
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- rpc: Upgrade the websocket client and server, including improved auto reconnect, and proper ping/pong
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BUG FIXES:
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- consensus: fix panic on getVoteBitArray
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- consensus: hang instead of panicking on byzantine consensus failures
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- cmd: dont load config for version command
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## 0.10.3 (August 10, 2017)
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FEATURES:
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- control over empty block production:
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- new flag, `--consensus.create_empty_blocks`; when set to false, blocks are only created when there are txs or when the AppHash changes.
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- new config option, `consensus.create_empty_blocks_interval`; an empty block is created after this many seconds.
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- in normal operation, `create_empty_blocks = true` and `create_empty_blocks_interval = 0`, so blocks are being created all the time (as in all previous versions of tendermint). The number of empty blocks can be reduced by increasing `create_empty_blocks_interval` or by setting `create_empty_blocks = false`.
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- new `TxsAvailable()` method added to Mempool that returns a channel which fires when txs are available.
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- new heartbeat message added to consensus reactor to notify peers that a node is waiting for txs before entering propose step.
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- rpc: Add `syncing` field to response returned by `/status`. Is `true` while in fast-sync mode.
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IMPROVEMENTS:
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- various improvements to documentation and code comments
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BUG FIXES:
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- mempool: pass height into constructor so it doesn't always start at 0
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## 0.10.2 (July 10, 2017)
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FEATURES:
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- Enable lower latency block commits by adding consensus reactor sleep durations and p2p flush throttle timeout to the config
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IMPROVEMENTS:
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- More detailed logging in the consensus reactor and state machine
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- More in-code documentation for many exposed functions, especially in consensus/reactor.go and p2p/switch.go
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- Improved readability for some function definitions and code blocks with long lines
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## 0.10.1 (June 28, 2017)
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FEATURES:
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- Use `--trace` to get stack traces for logged errors
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- types: GenesisDoc.ValidatorHash returns the hash of the genesis validator set
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- types: GenesisDocFromFile parses a GenesiDoc from a JSON file
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IMPROVEMENTS:
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- Add a Code of Conduct
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- Variety of improvements as suggested by `megacheck` tool
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- rpc: deduplicate tests between rpc/client and rpc/tests
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- rpc: addresses without a protocol prefix default to `tcp://`. `http://` is also accepted as an alias for `tcp://`
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- cmd: commands are more easily reuseable from other tools
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- DOCKER: automate build/push
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BUG FIXES:
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- Fix log statements using keys with spaces (logger does not currently support spaces)
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- rpc: set logger on websocket connection
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- rpc: fix ws connection stability by setting write deadline on pings
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## 0.10.0 (June 2, 2017)
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Includes major updates to configuration, logging, and json serialization.
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Also includes the Grand Repo-Merge of 2017.
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BREAKING CHANGES:
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- Config and Flags:
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- The `config` map is replaced with a [`Config` struct](https://github.com/tendermint/tendermint/blob/master/config/config.go#L11),
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containing substructs: `BaseConfig`, `P2PConfig`, `MempoolConfig`, `ConsensusConfig`, `RPCConfig`
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- This affects the following flags:
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- `--seeds` is now `--p2p.seeds`
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- `--node_laddr` is now `--p2p.laddr`
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- `--pex` is now `--p2p.pex`
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- `--skip_upnp` is now `--p2p.skip_upnp`
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- `--rpc_laddr` is now `--rpc.laddr`
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- `--grpc_laddr` is now `--rpc.grpc_laddr`
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- Any configuration option now within a substract must come under that heading in the `config.toml`, for instance:
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```
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[p2p]
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laddr="tcp://1.2.3.4:46656"
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[consensus]
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timeout_propose=1000
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```
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- Use viper and `DefaultConfig() / TestConfig()` functions to handle defaults, and remove `config/tendermint` and `config/tendermint_test`
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- Change some function and method signatures to
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- Change some [function and method signatures](https://gist.github.com/ebuchman/640d5fc6c2605f73497992fe107ebe0b) accomodate new config
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- Logger
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- Replace static `log15` logger with a simple interface, and provide a new implementation using `go-kit`.
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See our new [logging library](https://github.com/tendermint/tmlibs/log) and [blog post](https://tendermint.com/blog/abstracting-the-logger-interface-in-go) for more details
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- Levels `warn` and `notice` are removed (you may need to change them in your `config.toml`!)
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- Change some [function and method signatures](https://gist.github.com/ebuchman/640d5fc6c2605f73497992fe107ebe0b) to accept a logger
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- JSON serialization:
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- Replace `[TypeByte, Xxx]` with `{"type": "some-type", "data": Xxx}` in RPC and all `.json` files by using `go-wire/data`. For instance, a public key is now:
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```
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"pub_key": {
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"type": "ed25519",
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"data": "83DDF8775937A4A12A2704269E2729FCFCD491B933C4B0A7FFE37FE41D7760D0"
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}
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```
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- Remove type information about RPC responses, so `[TypeByte, {"jsonrpc": "2.0", ... }]` is now just `{"jsonrpc": "2.0", ... }`
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- Change `[]byte` to `data.Bytes` in all serialized types (for hex encoding)
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- Lowercase the JSON tags in `ValidatorSet` fields
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- Introduce `EventDataInner` for serializing events
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- Other:
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- Send InitChain message in handshake if `appBlockHeight == 0`
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- Do not include the `Accum` field when computing the validator hash. This makes the ValidatorSetHash unique for a given validator set, rather than changing with every block (as the Accum changes)
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- Unsafe RPC calls are not enabled by default. This includes `/dial_seeds`, and all calls prefixed with `unsafe`. Use the `--rpc.unsafe` flag to enable.
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FEATURES:
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- Per-module log levels. For instance, the new default is `state:info,*:error`, which means the `state` package logs at `info` level, and everything else logs at `error` level
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- Log if a node is validator or not in every consensus round
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- Use ldflags to set git hash as part of the version
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- Ignore `address` and `pub_key` fields in `priv_validator.json` and overwrite them with the values derrived from the `priv_key`
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IMPROVEMENTS:
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- Merge `tendermint/go-p2p -> tendermint/tendermint/p2p` and `tendermint/go-rpc -> tendermint/tendermint/rpc/lib`
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- Update paths for grand repo merge:
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- `go-common -> tmlibs/common`
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- `go-data -> go-wire/data`
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- All other `go-` libs, except `go-crypto` and `go-wire`, are merged under `tmlibs`
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- No global loggers (loggers are passed into constructors, or preferably set with a SetLogger method)
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- Return HTTP status codes with errors for RPC responses
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- Limit `/blockchain_info` call to return a maximum of 20 blocks
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- Use `.Wrap()` and `.Unwrap()` instead of eg. `PubKeyS` for `go-crypto` types
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- RPC JSON responses use pretty printing (via `json.MarshalIndent`)
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- Color code different instances of the consensus for tests
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- Isolate viper to `cmd/tendermint/commands` and do not read config from file for tests
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## 0.9.2 (April 26, 2017)
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BUG FIXES:
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- Fix bug in `ResetPrivValidator` where we were using the global config and log (causing external consumers, eg. basecoin, to fail).
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## 0.9.1 (April 21, 2017)
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FEATURES:
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- Transaction indexing - txs are indexed by their hash using a simple key-value store; easily extended to more advanced indexers
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- New `/tx?hash=X` endpoint to query for transactions and their DeliverTx result by hash. Optionally returns a proof of the tx's inclusion in the block
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- `tendermint testnet` command initializes files for a testnet
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IMPROVEMENTS:
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- CLI now uses Cobra framework
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- TMROOT is now TMHOME (TMROOT will stop working in 0.10.0)
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- `/broadcast_tx_XXX` also returns the Hash (can be used to query for the tx)
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- `/broadcast_tx_commit` also returns the height the block was committed in
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- ABCIResponses struct persisted to disk before calling Commit; makes handshake replay much cleaner
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- WAL uses #ENDHEIGHT instead of #HEIGHT (#HEIGHT will stop working in 0.10.0)
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- Peers included via `--seeds`, under `seeds` in the config, or in `/dial_seeds` are now persistent, and will be reconnected to if the connection breaks
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BUG FIXES:
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- Fix bug in fast-sync where we stop syncing after a peer is removed, even if they're re-added later
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- Fix handshake replay to handle validator set changes and results of DeliverTx when we crash after app.Commit but before state.Save()
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## 0.9.0 (March 6, 2017)
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BREAKING CHANGES:
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- Update ABCI to v0.4.0, where Query is now `Query(RequestQuery) ResponseQuery`, enabling precise proofs at particular heights:
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```
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message RequestQuery{
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bytes data = 1;
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string path = 2;
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uint64 height = 3;
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bool prove = 4;
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}
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message ResponseQuery{
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CodeType code = 1;
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int64 index = 2;
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bytes key = 3;
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bytes value = 4;
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bytes proof = 5;
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uint64 height = 6;
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string log = 7;
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}
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```
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- `BlockMeta` data type unifies its Hash and PartSetHash under a `BlockID`:
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```
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type BlockMeta struct {
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BlockID BlockID `json:"block_id"` // the block hash and partsethash
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Header *Header `json:"header"` // The block's Header
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}
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```
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- `ValidatorSet.Proposer` is exposed as a field and persisted with the `State`. Use `GetProposer()` to initialize or update after validator-set changes.
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- `tendermint gen_validator` command output is now pure JSON
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FEATURES:
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- New RPC endpoint `/commit?height=X` returns header and commit for block at height `X`
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- Client API for each endpoint, including mocks for testing
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IMPROVEMENTS:
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- `Node` is now a `BaseService`
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- Simplified starting Tendermint in-process from another application
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- Better organized Makefile
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- Scripts for auto-building binaries across platforms
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- Docker image improved, slimmed down (using Alpine), and changed from tendermint/tmbase to tendermint/tendermint
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- New repo files: `CONTRIBUTING.md`, Github `ISSUE_TEMPLATE`, `CHANGELOG.md`
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- Improvements on CircleCI for managing build/test artifacts
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- Handshake replay is doen through the consensus package, possibly using a mockApp
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- Graceful shutdown of RPC listeners
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- Tests for the PEX reactor and DialSeeds
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BUG FIXES:
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- Check peer.Send for failure before updating PeerState in consensus
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- Fix panic in `/dial_seeds` with invalid addresses
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- Fix proposer selection logic in ValidatorSet by taking the address into account in the `accumComparable`
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- Fix inconcistencies with `ValidatorSet.Proposer` across restarts by persisting it in the `State`
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## 0.8.0 (January 13, 2017)
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BREAKING CHANGES:
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- New data type `BlockID` to represent blocks:
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```
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type BlockID struct {
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Hash []byte `json:"hash"`
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PartsHeader PartSetHeader `json:"parts"`
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}
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```
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- `Vote` data type now includes validator address and index:
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```
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type Vote struct {
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ValidatorAddress []byte `json:"validator_address"`
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ValidatorIndex int `json:"validator_index"`
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Height int `json:"height"`
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Round int `json:"round"`
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Type byte `json:"type"`
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BlockID BlockID `json:"block_id"` // zero if vote is nil.
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Signature crypto.Signature `json:"signature"`
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}
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```
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- Update TMSP to v0.3.0, where it is now called ABCI and AppendTx is DeliverTx
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- Hex strings in the RPC are now "0x" prefixed
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FEATURES:
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- New message type on the ConsensusReactor, `Maj23Msg`, for peers to alert others they've seen a Maj23,
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in order to track and handle conflicting votes intelligently to prevent Byzantine faults from causing halts:
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```
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type VoteSetMaj23Message struct {
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Height int
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Round int
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Type byte
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BlockID types.BlockID
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}
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```
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- Configurable block part set size
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- Validator set changes
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- Optionally skip TimeoutCommit if we have all the votes
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- Handshake between Tendermint and App on startup to sync latest state and ensure consistent recovery from crashes
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- GRPC server for BroadcastTx endpoint
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|
IMPROVEMENTS:
|
|
|
|
- Less verbose logging
|
|
- Better test coverage (37% -> 49%)
|
|
- Canonical SignBytes for signable types
|
|
- Write-Ahead Log for Mempool and Consensus via tmlibs/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
|
|
|
|
## PreHistory
|
|
|
|
Strict versioning only began with the release of v0.7.0, in late summer 2016.
|
|
The project itself began in early summer 2014 and was workable decentralized cryptocurrency software by the end of that year.
|
|
Through the course of 2015, in collaboration with Eris Industries (now Monax Indsutries),
|
|
many additional features were integrated, including an implementation from scratch of the Ethereum Virtual Machine.
|
|
That implementation now forms the heart of [Burrow](https://github.com/hyperledger/burrow).
|
|
In the later half of 2015, the consensus algorithm was upgraded with a more asynchronous design and a more deterministic and robust implementation.
|
|
|
|
By late 2015, frustration with the difficulty of forking a large monolithic stack to create alternative cryptocurrency designs led to the
|
|
invention of the Application Blockchain Interface (ABCI), then called the Tendermint Socket Protocol (TMSP).
|
|
The Ethereum Virtual Machine and various other transaction features were removed, and Tendermint was whittled down to a core consensus engine
|
|
driving an application running in another process.
|
|
The ABCI interface and implementation were iterated on and improved over the course of 2016,
|
|
until versioned history kicked in with v0.7.0.
|