Golang PartSet.GetPart方法代码示例

// blockParts:     Must be parts of the block
// seenValidation: The +2/3 precommits that were seen which committed at height.
//                 If all the nodes restart after committing a block,
//                 we need this to reload the precommits to catch-up nodes to the
//                 most recent height.  Otherwise they'd stall at H-1.
func (bs *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, seenValidation *types.Validation) {
	height := block.Height
	if height != bs.height+1 {
		PanicSanity(Fmt("BlockStore can only save contiguous blocks. Wanted %v, got %v", bs.height+1, height))
	}
	if !blockParts.IsComplete() {
		PanicSanity(Fmt("BlockStore can only save complete block part sets"))
	}

	// Save block meta
	meta := types.NewBlockMeta(block, blockParts)
	metaBytes := wire.BinaryBytes(meta)
	bs.db.Set(calcBlockMetaKey(height), metaBytes)

	// Save block parts
	for i := 0; i < blockParts.Total(); i++ {
		bs.saveBlockPart(height, i, blockParts.GetPart(i))
	}

	// Save block validation (duplicate and separate from the Block)
	blockValidationBytes := wire.BinaryBytes(block.LastValidation)
	bs.db.Set(calcBlockValidationKey(height-1), blockValidationBytes)

	// Save seen validation (seen +2/3 precommits for block)
	seenValidationBytes := wire.BinaryBytes(seenValidation)
	bs.db.Set(calcSeenValidationKey(height), seenValidationBytes)

	// Save new BlockStoreStateJSON descriptor
	BlockStoreStateJSON{Height: height}.Save(bs.db)

	// Done!
	bs.height = height
}

// May block on send if queue is full.
func (cs *ConsensusState) SetProposalAndBlock(proposal *types.Proposal, block *types.Block, parts *types.PartSet, peerKey string) error {
	cs.SetProposal(proposal, peerKey)
	for i := 0; i < parts.Total(); i++ {
		part := parts.GetPart(i)
		cs.AddProposalBlockPart(proposal.Height, proposal.Round, part, peerKey)
	}
	return nil // TODO errors
}

func (cs *ConsensusState) decideProposal(height, round int) {
	var block *types.Block
	var blockParts *types.PartSet

	// Decide on block
	if cs.LockedBlock != nil {
		// If we're locked onto a block, just choose that.
		block, blockParts = cs.LockedBlock, cs.LockedBlockParts
	} else {
		// Create a new proposal block from state/txs from the mempool.
		block, blockParts = cs.createProposalBlock()
		if block == nil { // on error
			return
		}
	}

	// Make proposal
	proposal := types.NewProposal(height, round, blockParts.Header(), cs.Votes.POLRound())
	err := cs.privValidator.SignProposal(cs.state.ChainID, proposal)
	if err == nil {
		// Set fields
		/*  fields set by setProposal and addBlockPart
		cs.Proposal = proposal
		cs.ProposalBlock = block
		cs.ProposalBlockParts = blockParts
		*/

		// send proposal and block parts on internal msg queue
		cs.sendInternalMessage(msgInfo{&ProposalMessage{proposal}, ""})
		for i := 0; i < blockParts.Total(); i++ {
			part := blockParts.GetPart(i)
			cs.sendInternalMessage(msgInfo{&BlockPartMessage{cs.Height, cs.Round, part}, ""})
		}
		log.Info("Signed and sent proposal", "height", height, "round", round, "proposal", proposal)
		log.Debug(Fmt("Signed and sent proposal block: %v", block))
	} else {
		log.Warn("enterPropose: Error signing proposal", "height", height, "round", round, "error", err)
	}

}