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Fixes #671 Unexpose GenesisDoc and ChainID fields to avoid them being serialized to the DB on every block write/state.Save() A GenesisDoc can now be alternatively written to the state's database, by serializing its JSON as a value of key "genesis-doc". There are now accessors and a setter for these attributes: - state.GenesisDoc() (*types.GenesisDoc, error) - state.ChainID() (string, error) - state.SetGenesisDoc(*types.GenesisDoc) This is a breaking change since it changes how the state's serialization and requires that if loading the GenesisDoc entirely from the database, you'll need to set its value in the database as the GenesisDoc's JSON marshaled bytes.
The core consensus algorithm.
- state.go - The state machine as detailed in the whitepaper
- reactor.go - A reactor that connects the state machine to the gossip network
Go-routine summary
The reactor runs 2 go-routines for each added peer: gossipDataRoutine and gossipVotesRoutine.
The consensus state runs two persistent go-routines: timeoutRoutine and receiveRoutine. Go-routines are also started to trigger timeouts and to avoid blocking when the internalMsgQueue is really backed up.
Replay/WAL
A write-ahead log is used to record all messages processed by the receiveRoutine, which amounts to all inputs to the consensus state machine: messages from peers, messages from ourselves, and timeouts. They can be played back deterministically at startup or using the replay console.