// Save Block, save the +2/3 Commits we've seen,
// and sign a Commit-Vote if we haven't already
func (cs *ConsensusState) saveCommitVoteBlock(block *types.Block, blockParts *types.PartSet, commits *VoteSet) {
// The proposal must be valid.
if err := cs.stageBlock(block, blockParts); err != nil {
// Prevent zombies.
log.Warn("saveCommitVoteBlock() an invalid block", "error", err)
return
}
// Save to blockStore.
if cs.blockStore.Height() < block.Height {
seenValidation := commits.MakeValidation()
cs.blockStore.SaveBlock(block, blockParts, seenValidation)
}
// Save the state.
cs.stagedState.Save()
// Update mempool.
cs.mempoolReactor.Mempool.ResetForBlockAndState(block, cs.stagedState)
// Commit-vote if we haven't already.
if cs.lastCommitVoteHeight < block.Height {
cs.signAddVote(types.VoteTypeCommit, block.Hash(), blockParts.Header())
cs.lastCommitVoteHeight = block.Height
}
}
func (cs *ConsensusState) stageBlock(block *types.Block, blockParts *types.PartSet) error {
if block == nil {
panic("Cannot stage nil block")
}
// Already staged?
blockHash := block.Hash()
if cs.stagedBlock != nil && len(blockHash) != 0 && bytes.Equal(cs.stagedBlock.Hash(), blockHash) {
return nil
}
// Create a copy of the state for staging
stateCopy := cs.state.Copy()
// reset the event cache and pass it into the state
cs.evc = events.NewEventCache(cs.evsw)
stateCopy.SetFireable(cs.evc)
// Commit block onto the copied state.
// NOTE: Basic validation is done in state.AppendBlock().
err := sm.ExecBlock(stateCopy, block, blockParts.Header())
if err != nil {
return err
} else {
cs.stagedBlock = block
cs.stagedState = stateCopy
return nil
}
}
// sign a Commit-Vote
func (cs *ConsensusState) commitVoteBlock(block *types.Block, blockParts *types.PartSet) {
// The proposal must be valid.
if err := cs.stageBlock(block, blockParts); err != nil {
// Prevent zombies.
log.Warn("commitVoteBlock() an invalid block", "error", err)
return
}
// Commit-vote.
if cs.lastCommitVoteHeight < block.Height {
cs.signAddVote(types.VoteTypeCommit, block.Hash(), blockParts.Header())
cs.lastCommitVoteHeight = block.Height
} else {
log.Error("Duplicate commitVoteBlock() attempt", "lastCommitVoteHeight", cs.lastCommitVoteHeight, "types.Height", block.Height)
}
}
func (cs *ConsensusState) RunActionPropose(height uint, round uint) {
cs.mtx.Lock()
defer cs.mtx.Unlock()
if cs.Height != height || cs.Round != round {
return
}
defer func() {
cs.Step = RoundStepPropose
cs.newStepCh <- cs.getRoundState()
}()
// Nothing to do if it's not our turn.
if cs.privValidator == nil {
return
}
if !bytes.Equal(cs.Validators.Proposer().Address, cs.privValidator.Address) {
log.Debug("Not our turn to propose", "proposer", cs.Validators.Proposer().Address, "privValidator", cs.privValidator)
return
} else {
log.Debug("Our turn to propose", "proposer", cs.Validators.Proposer().Address, "privValidator", cs.privValidator)
}
var block *types.Block
var blockParts *types.PartSet
var pol *POL
var polParts *types.PartSet
// Decide on block and POL
if cs.LockedBlock != nil {
// If we're locked onto a block, just choose that.
block = cs.LockedBlock
blockParts = cs.LockedBlockParts
pol = cs.LockedPOL
} else {
// Otherwise we should create a new proposal.
var validation *types.Validation
if cs.Height == 1 {
// We're creating a proposal for the first block.
// The validation is empty.
validation = &types.Validation{}
} else if cs.LastCommits.HasTwoThirdsMajority() {
// Make the validation from LastCommits
validation = cs.LastCommits.MakeValidation()
} else {
// Upon reboot, we may have to use SeenValidation
validation = cs.blockStore.LoadSeenValidation(height - 1)
if validation == nil {
// We just don't have any validation for the previous block
log.Debug("Cannot propose anything: No validation for the previous block.")
return
}
}
txs := cs.mempoolReactor.Mempool.GetProposalTxs()
block = &types.Block{
Header: &types.Header{
Network: config.GetString("network"),
Height: cs.Height,
Time: time.Now(),
Fees: 0, // TODO fees
NumTxs: uint(len(txs)),
LastBlockHash: cs.state.LastBlockHash,
LastBlockParts: cs.state.LastBlockParts,
StateHash: nil, // Will set afterwards.
},
Validation: validation,
Data: &types.Data{
Txs: txs,
},
}
// Set the types.Header.StateHash.
err := cs.state.SetBlockStateHash(block)
if err != nil {
log.Error("Error setting state hash", "error", err)
return
}
blockParts = block.MakePartSet()
pol = cs.LockedPOL // If exists, is a PoUnlock.
}
if pol != nil {
polParts = pol.MakePartSet()
}
// Make proposal
proposal := NewProposal(cs.Height, cs.Round, blockParts.Header(), polParts.Header())
err := cs.privValidator.SignProposal(proposal)
if err == nil {
log.Info("Signed and set proposal", "height", cs.Height, "round", cs.Round, "proposal", proposal)
log.Debug(Fmt("Signed and set proposal block: %v", block))
// Set fields
cs.Proposal = proposal
cs.ProposalBlock = block
cs.ProposalBlockParts = blockParts
cs.ProposalPOL = pol
cs.ProposalPOLParts = polParts
} else {
log.Warn("Error signing proposal", "height", cs.Height, "round", cs.Round, "error", err)
}
}