package protocol
import (
- "encoding/hex"
- "sort"
- "time"
-
+ "github.com/vapor/config"
+ "github.com/vapor/consensus"
"github.com/vapor/errors"
- "github.com/vapor/math/checked"
"github.com/vapor/protocol/bc"
"github.com/vapor/protocol/bc/types"
"github.com/vapor/protocol/state"
)
-const (
- numOfConsensusNode = 21
- roundVoteBlockNums = 1000
-
- // BlockTimeInterval indicate product one block per 500 milliseconds
- BlockTimeInterval = 500
- // BlockNumEachNode indicate product three blocks per node in succession
- BlockNumEachNode = 3
-)
-
var (
- errHasNoChanceProductBlock = errors.New("the node has no chance to product a block in this round of voting")
- errNotFoundConsensusNode = errors.New("can not found consensus node")
- errNotFoundBlockNode = errors.New("can not find block node")
+ errNotFoundConsensusNode = errors.New("can not found consensus node")
+ errNotFoundBlockNode = errors.New("can not find block node")
)
-type consensusNode struct {
- pubkey string
- voteNum uint64
- order uint64
-}
-
-type consensusNodeSlice []*consensusNode
-
-func (c consensusNodeSlice) Len() int { return len(c) }
-func (c consensusNodeSlice) Less(i, j int) bool { return c[i].voteNum > c[j].voteNum }
-func (c consensusNodeSlice) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
-
type consensusNodeManager struct {
store Store
blockIndex *state.BlockIndex
}
}
-func (c *consensusNodeManager) getConsensusNode(blockHash *bc.Hash, pubkey string) (*consensusNode, error) {
- consensusNodeMap, err := c.getConsensusNodesByVoteResult(blockHash)
+func (c *consensusNodeManager) getConsensusNode(prevBlockHash *bc.Hash, pubkey string) (*state.ConsensusNode, error) {
+ consensusNodeMap, err := c.getConsensusNodesByVoteResult(prevBlockHash)
if err != nil {
return nil, err
}
return node, nil
}
-func (c *consensusNodeManager) isBlocker(blockHash *bc.Hash, pubkey string) (bool, error) {
- blockNode := c.blockIndex.GetNode(blockHash)
- if blockNode == nil {
- return false, errNotFoundBlockNode
- }
-
- consensusNode, err := c.getConsensusNode(blockHash, pubkey)
- if err != nil && err != errNotFoundConsensusNode {
+func (c *consensusNodeManager) isBlocker(prevBlockHash *bc.Hash, pubKey string, timeStamp uint64) (bool, error) {
+ consensusNodeMap, err := c.getConsensusNodesByVoteResult(prevBlockHash)
+ if err != nil {
return false, err
}
+ consensusNode := consensusNodeMap[pubKey]
if consensusNode == nil {
return false, nil
}
- prevVoteRoundLastBlock, err := c.getPrevRoundVoteLastBlock(blockNode)
+ prevVoteRoundLastBlock, err := c.getPrevRoundVoteLastBlock(prevBlockHash)
if err != nil {
return false, err
}
- startTimestamp := prevVoteRoundLastBlock.Timestamp + BlockTimeInterval
-
- begin := getLastBlockTimeInTimeRange(startTimestamp, blockNode.Timestamp, consensusNode.order)
- end := begin + BlockNumEachNode*BlockTimeInterval
- return blockNode.Timestamp >= begin && blockNode.Timestamp < end, nil
+ startTimestamp := prevVoteRoundLastBlock.Timestamp + consensus.BlockTimeInterval
+ begin := getLastBlockTimeInTimeRange(startTimestamp, timeStamp, consensusNode.Order, len(consensusNodeMap))
+ end := begin + consensus.BlockNumEachNode*consensus.BlockTimeInterval
+ return timeStamp >= begin && timeStamp < end, nil
}
-func (c *consensusNodeManager) nextLeaderTimeRange(pubkey []byte, bestBlockHash *bc.Hash) (uint64, uint64, error) {
- bestBlockNode := c.blockIndex.GetNode(bestBlockHash)
- if bestBlockNode == nil {
- return 0, 0, errNotFoundBlockNode
- }
-
- consensusNode, err := c.getConsensusNode(bestBlockHash, hex.EncodeToString(pubkey))
- if err != nil {
- return 0, 0, err
- }
-
- prevRoundLastBlock, err := c.getPrevRoundVoteLastBlock(bestBlockNode)
- if err != nil {
- return 0, 0, nil
- }
-
- startTime := prevRoundLastBlock.Timestamp + BlockTimeInterval
- endTime := startTime + roundVoteBlockNums*BlockTimeInterval
-
- nextLeaderTime, err := nextLeaderTimeHelper(startTime, endTime, uint64(time.Now().UnixNano()/1e6), consensusNode.order)
- if err != nil {
- return 0, 0, err
- }
-
- return nextLeaderTime, nextLeaderTime + BlockNumEachNode*BlockTimeInterval, nil
-}
-
-func nextLeaderTimeHelper(startTime, endTime, now, nodeOrder uint64) (uint64, error) {
- nextLeaderTimestamp := getLastBlockTimeInTimeRange(startTime, now, nodeOrder)
- roundBlockTime := uint64(BlockNumEachNode * numOfConsensusNode * BlockTimeInterval)
-
- if int64(now-nextLeaderTimestamp) >= BlockNumEachNode*BlockTimeInterval {
- nextLeaderTimestamp += roundBlockTime
- if nextLeaderTimestamp >= endTime {
- return 0, errHasNoChanceProductBlock
- }
- }
-
- return nextLeaderTimestamp, nil
-}
-
-func getLastBlockTimeInTimeRange(startTimestamp, endTimestamp, order uint64) uint64 {
+func getLastBlockTimeInTimeRange(startTimestamp, endTimestamp, order uint64, numOfConsensusNode int) uint64 {
// One round of product block time for all consensus nodes
- roundBlockTime := uint64(BlockNumEachNode * numOfConsensusNode * BlockTimeInterval)
+ roundBlockTime := uint64(consensus.BlockNumEachNode * numOfConsensusNode * consensus.BlockTimeInterval)
// The start time of the last round of product block
lastRoundStartTime := startTimestamp + (endTimestamp-startTimestamp)/roundBlockTime*roundBlockTime
// The time of product block of the consensus in last round
- return lastRoundStartTime + order*(BlockNumEachNode*BlockTimeInterval)
+ return lastRoundStartTime + order*(consensus.BlockNumEachNode*consensus.BlockTimeInterval)
}
-func (c *consensusNodeManager) getPrevRoundVoteLastBlock(blockNode *state.BlockNode) (*state.BlockNode, error) {
- prevVoteRoundLastBlockHeight := blockNode.Height/roundVoteBlockNums*roundVoteBlockNums - 1
- lastBlockNode := c.blockIndex.NodeByHeightInSameChain(&blockNode.Hash, prevVoteRoundLastBlockHeight)
- if blockNode == nil {
+func (c *consensusNodeManager) getPrevRoundVoteLastBlock(prevBlockHash *bc.Hash) (*state.BlockNode, error) {
+ prevBlockNode := c.blockIndex.GetNode(prevBlockHash)
+ if prevBlockNode == nil {
+ return nil, errNotFoundBlockNode
+ }
+
+ blockHeight := prevBlockNode.Height + 1
+
+ prevVoteRoundLastBlockHeight := blockHeight/consensus.RoundVoteBlockNums*consensus.RoundVoteBlockNums - 1
+ // first round
+ if blockHeight/consensus.RoundVoteBlockNums == 0 {
+ prevVoteRoundLastBlockHeight = 0
+ }
+
+ lastBlockNode := prevBlockNode.GetParent(prevVoteRoundLastBlockHeight)
+ if lastBlockNode == nil {
return nil, errNotFoundBlockNode
}
return lastBlockNode, nil
}
-func (c *consensusNodeManager) getConsensusNodesByVoteResult(blockHash *bc.Hash) (map[string]*consensusNode, error) {
- blockNode := c.blockIndex.GetNode(blockHash)
- if blockNode == nil {
+func (c *consensusNodeManager) getConsensusNodesByVoteResult(prevBlockHash *bc.Hash) (map[string]*state.ConsensusNode, error) {
+ prevBlockNode := c.blockIndex.GetNode(prevBlockHash)
+ if prevBlockNode == nil {
return nil, errNotFoundBlockNode
}
- seq := blockNode.Height / roundVoteBlockNums
+ seq := (prevBlockNode.Height + 1) / consensus.RoundVoteBlockNums
voteResult, err := c.store.GetVoteResult(seq)
if err != nil {
- // fail to find vote result, try to construct
+ // TODO find previous round vote
voteResult = &state.VoteResult{
Seq: seq,
NumOfVote: make(map[string]uint64),
- Finalized: false,
}
}
- lastBlockNode, err := c.getPrevRoundVoteLastBlock(blockNode)
+ lastBlockNode, err := c.getPrevRoundVoteLastBlock(prevBlockHash)
if err != nil {
return nil, err
}
return nil, err
}
- var nodes []*consensusNode
- for pubkey, voteNum := range voteResult.NumOfVote {
- nodes = append(nodes, &consensusNode{
- pubkey: pubkey,
- voteNum: voteNum,
- })
- }
- // In principle, there is no need to sort all voting nodes.
- // if there is a performance problem, consider the optimization later.
- // TODO not consider the same number of votes
- sort.Sort(consensusNodeSlice(nodes))
-
- result := make(map[string]*consensusNode)
- for i := 0; i < numOfConsensusNode; i++ {
- node := nodes[i]
- node.order = uint64(i)
- result[node.pubkey] = node
+ if len(voteResult.NumOfVote) == 0 {
+ return initConsensusNodes(), nil
}
- return result, nil
+
+ return voteResult.ConsensusNodes()
}
func (c *consensusNodeManager) reorganizeVoteResult(voteResult *state.VoteResult, forkChainNode *state.BlockNode) error {
- var mainChainNode *state.BlockNode
+ genesisBlockHash := config.GenesisBlock().Hash()
+ mainChainNode := c.blockIndex.GetNode(&genesisBlockHash)
+
emptyHash := bc.Hash{}
if voteResult.LastBlockHash != emptyHash {
mainChainNode = c.blockIndex.GetNode(&voteResult.LastBlockHash)
}
}
- var attachBlocks []*types.Block
- var detachBlocks []*types.Block
+ var attachNodes []*state.BlockNode
+ var detachNodes []*state.BlockNode
- for forkChainNode.Hash != mainChainNode.Hash && forkChainNode.Height >= (voteResult.Seq-1)*roundVoteBlockNums {
- attachBlock, err := c.store.GetBlock(&forkChainNode.Hash)
- if err != nil {
- return err
+ for forkChainNode != nil && mainChainNode != nil && forkChainNode.Hash != mainChainNode.Hash {
+ if forkChainNode.Height == mainChainNode.Height {
+ detachNodes = append(detachNodes, mainChainNode)
+ mainChainNode = mainChainNode.Parent
}
-
- attachBlocks = append([]*types.Block{attachBlock}, attachBlocks...)
+ attachNodes = append([]*state.BlockNode{forkChainNode}, attachNodes...)
forkChainNode = forkChainNode.Parent
+ }
- if mainChainNode != nil && forkChainNode.Height == mainChainNode.Height {
- detachBlock, err := c.store.GetBlock(&mainChainNode.Hash)
- if err != nil {
- return err
- }
-
- detachBlocks = append(detachBlocks, detachBlock)
- mainChainNode = mainChainNode.Parent
+ for _, node := range detachNodes {
+ block, err := c.store.GetBlock(&node.Hash)
+ if err != nil {
+ return err
}
- }
- for _, block := range detachBlocks {
if err := c.detachBlock(map[uint64]*state.VoteResult{voteResult.Seq: voteResult}, block); err != nil {
return err
}
}
- for _, block := range attachBlocks {
+ for _, node := range attachNodes {
+ block, err := c.store.GetBlock(&node.Hash)
+ if err != nil {
+ return err
+ }
+
if err := c.applyBlock(map[uint64]*state.VoteResult{voteResult.Seq: voteResult}, block); err != nil {
return err
}
}
func (c *consensusNodeManager) applyBlock(voteResultMap map[uint64]*state.VoteResult, block *types.Block) (err error) {
- voteSeq := block.Height / roundVoteBlockNums
- voteResult := voteResultMap[voteSeq]
+ voteResult, err := c.getVoteResult(voteResultMap, block.Height)
+ if err != nil {
+ return err
+ }
- if voteResult == nil {
- voteResult, err = c.store.GetVoteResult(voteSeq)
- if err != nil && err != ErrNotFoundVoteResult {
- return err
+ return voteResult.ApplyBlock(block)
+}
+
+func (c *consensusNodeManager) getVoteResult(voteResultMap map[uint64]*state.VoteResult, blockHeight uint64) (*state.VoteResult, error) {
+ var err error
+ // This round of voting prepares for the next round
+ seq := blockHeight/consensus.RoundVoteBlockNums + 1
+ voteResult := voteResultMap[seq]
+ if blockHeight == 0 {
+ voteResult = &state.VoteResult{
+ Seq: seq,
+ NumOfVote: make(map[string]uint64),
}
}
if voteResult == nil {
- voteResult = &state.VoteResult{
- Seq: voteSeq,
- NumOfVote: make(map[string]uint64),
- LastBlockHash: block.Hash(),
+ prevVoteResult := voteResultMap[seq-1]
+ if prevVoteResult != nil {
+ voteResult = &state.VoteResult{
+ Seq: seq,
+ NumOfVote: prevVoteResult.NumOfVote,
+ }
}
}
- voteResultMap[voteSeq] = voteResult
-
- if voteResult.LastBlockHash != block.PreviousBlockHash {
- return errors.New("bbft append block error, the block parent hash is not equals last block hash of vote result")
+ if voteResult == nil {
+ voteResult, err = c.store.GetVoteResult(seq)
+ if err != nil && err != ErrNotFoundVoteResult {
+ return nil, err
+ }
}
- for _, tx := range block.Transactions {
- for _, input := range tx.Inputs {
- unVoteInput, ok := input.TypedInput.(*types.UnvoteInput)
- if !ok {
- continue
- }
-
- pubkey := hex.EncodeToString(unVoteInput.Vote)
- voteResult.NumOfVote[pubkey], ok = checked.SubUint64(voteResult.NumOfVote[pubkey], unVoteInput.Amount)
- if !ok {
- return errVotingOperationOverFlow
- }
+ if voteResult == nil {
+ voteResult, err = c.store.GetVoteResult(seq - 1)
+ if err != nil && err != ErrNotFoundVoteResult {
+ return nil, err
}
- for _, output := range tx.Outputs {
- voteOutput, ok := output.TypedOutput.(*types.VoteTxOutput)
- if !ok {
- continue
- }
- pubkey := hex.EncodeToString(voteOutput.Vote)
- voteResult.NumOfVote[pubkey], ok = checked.AddUint64(voteResult.NumOfVote[pubkey], voteOutput.Amount)
- if !ok {
- return errVotingOperationOverFlow
- }
+ if voteResult != nil {
+ voteResult.Seq = seq
+ voteResult.LastBlockHash = bc.Hash{}
}
}
- voteResult.Finalized = (block.Height+1)%roundVoteBlockNums == 0
- return nil
+ if voteResult == nil {
+ return nil, errors.New("fail to get vote result")
+ }
+
+ voteResultMap[seq] = voteResult
+ return voteResult, nil
}
func (c *consensusNodeManager) detachBlock(voteResultMap map[uint64]*state.VoteResult, block *types.Block) error {
- voteSeq := block.Height / roundVoteBlockNums
+ voteSeq := block.Height / consensus.RoundVoteBlockNums
voteResult := voteResultMap[voteSeq]
if voteResult == nil {
voteResultMap[voteSeq] = voteResult
}
- if voteResult.LastBlockHash != block.Hash() {
- return errors.New("bbft detach block error, the block hash is not equals last block hash of vote result")
- }
-
- for _, tx := range block.Transactions {
- for _, input := range tx.Inputs {
- unVoteInput, ok := input.TypedInput.(*types.UnvoteInput)
- if !ok {
- continue
- }
-
- pubkey := hex.EncodeToString(unVoteInput.Vote)
- voteResult.NumOfVote[pubkey], ok = checked.AddUint64(voteResult.NumOfVote[pubkey], unVoteInput.Amount)
- if !ok {
- return errVotingOperationOverFlow
- }
- }
- for _, output := range tx.Outputs {
- voteOutput, ok := output.TypedOutput.(*types.VoteTxOutput)
- if !ok {
- continue
- }
+ voteResult.DetachBlock(block)
+ return nil
+}
- pubkey := hex.EncodeToString(voteOutput.Vote)
- voteResult.NumOfVote[pubkey], ok = checked.SubUint64(voteResult.NumOfVote[pubkey], voteOutput.Amount)
- if !ok {
- return errVotingOperationOverFlow
- }
- }
+func initConsensusNodes() map[string]*state.ConsensusNode {
+ voteResult := map[string]*state.ConsensusNode{}
+ for i, xpub := range config.CommonConfig.Federation.Xpubs {
+ voteResult[xpub.String()] = &state.ConsensusNode{XPub: xpub, VoteNum: 0, Order: uint64(i)}
}
-
- voteResult.Finalized = false
- return nil
+ return voteResult
}
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