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consensus: link to spec from readme (#1609)

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Zach Ramsay
2018-05-23 09:41:54 -04:00
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consensus/README.md
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# The core consensus algorithm. See the [consensus spec](https://github.com/tendermint/tendermint/tree/master/docs/spec/consensus)
* 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.