log "github.com/sirupsen/logrus"
- "github.com/vapor/config"
- "github.com/vapor/errors"
- "github.com/vapor/event"
- "github.com/vapor/protocol/bc"
- "github.com/vapor/protocol/bc/types"
- "github.com/vapor/protocol/state"
+ "github.com/bytom/vapor/config"
+ "github.com/bytom/vapor/crypto/ed25519/chainkd"
+ "github.com/bytom/vapor/errors"
+ "github.com/bytom/vapor/event"
+ "github.com/bytom/vapor/protocol/bc"
+ "github.com/bytom/vapor/protocol/bc/types"
+ "github.com/bytom/vapor/protocol/state"
)
const (
)
var (
- errVotingOperationOverFlow = errors.New("voting operation result overflow")
- errDoubleSignBlock = errors.New("the consensus is double sign in same height of different block")
- errInvalidSignature = errors.New("the signature of block is invalid")
- errSignForkChain = errors.New("can not sign fork before the irreversible block")
+ errDoubleSignBlock = errors.New("the consensus is double sign in same height of different block")
+ errInvalidSignature = errors.New("the signature of block is invalid")
+ errSignForkChain = errors.New("can not sign fork before the irreversible block")
)
func signCacheKey(blockHash, pubkey string) string {
return fmt.Sprintf("%s:%s", blockHash, pubkey)
}
-func (c *Chain) isIrreversible(blockNode *state.BlockNode) bool {
- consensusNodes, err := c.consensusNodeManager.getConsensusNodes(&blockNode.Parent.Hash)
+func (c *Chain) checkDoubleSign(bh *types.BlockHeader, xPub string) error {
+ blockHashes, err := c.store.GetBlockHashesByHeight(bh.Height)
if err != nil {
- return false
+ return err
}
- signCount := 0
- for i := 0; i < len(consensusNodes); i++ {
- if ok, _ := blockNode.BlockWitness.Test(uint32(i)); ok {
- signCount++
+ for _, blockHash := range blockHashes {
+ if *blockHash == bh.Hash() {
+ continue
}
- }
- return signCount > len(consensusNodes)*2/3
-}
+ blockHeader, err := c.store.GetBlockHeader(blockHash)
+ if err != nil {
+ return err
+ }
-// GetVoteResultByHash return vote result by block hash
-func (c *Chain) GetVoteResultByHash(blockHash *bc.Hash) (*state.VoteResult, error) {
- blockNode := c.index.GetNode(blockHash)
- return c.consensusNodeManager.getVoteResult(state.CalcVoteSeq(blockNode.Height), blockNode)
-}
+ consensusNode, err := c.getConsensusNode(&blockHeader.PreviousBlockHash, xPub)
+ if err == errNotFoundConsensusNode {
+ continue
+ } else if err != nil {
+ return err
+ }
-// IsBlocker returns whether the consensus node is a blocker at the specified time
-func (c *Chain) IsBlocker(prevBlockHash *bc.Hash, pubKey string, timeStamp uint64) (bool, error) {
- xPub, err := c.consensusNodeManager.getBlocker(prevBlockHash, timeStamp)
- if err != nil {
- return false, err
+ if blockHeader.BlockWitness.Get(consensusNode.Order) != nil {
+ return errDoubleSignBlock
+ }
}
- return xPub == pubKey, nil
+ return nil
}
-// GetBlock return blocker by specified timestamp
-func (c *Chain) GetBlocker(prevBlockHash *bc.Hash, timestamp uint64) (string, error) {
- return c.consensusNodeManager.getBlocker(prevBlockHash, timestamp)
+func (c *Chain) checkNodeSign(bh *types.BlockHeader, consensusNode *state.ConsensusNode, signature []byte) error {
+ if !consensusNode.XPub.Verify(bh.Hash().Bytes(), signature) {
+ return errInvalidSignature
+ }
+
+ return c.checkDoubleSign(bh, consensusNode.XPub.String())
}
-// ProcessBlockSignature process the received block signature messages
-// return whether a block become irreversible, if so, the chain module must update status
-func (c *Chain) ProcessBlockSignature(signature, xPub []byte, blockHash *bc.Hash) error {
- xpubStr := hex.EncodeToString(xPub[:])
- blockNode := c.index.GetNode(blockHash)
- // save the signature if the block is not exist
- if blockNode == nil {
- cacheKey := signCacheKey(blockHash.String(), xpubStr)
- c.signatureCache.Add(cacheKey, signature)
- return nil
+func (c *Chain) isIrreversible(blockHeader *types.BlockHeader) bool {
+ consensusNodes, err := c.getConsensusNodes(&blockHeader.PreviousBlockHash)
+ if err != nil {
+ return false
}
- consensusNode, err := c.consensusNodeManager.getConsensusNode(&blockNode.Parent.Hash, xpubStr)
- if err != nil {
+ signCount := 0
+ for i := 0; i < len(consensusNodes); i++ {
+ if blockHeader.BlockWitness.Get(uint64(i)) != nil {
+ signCount++
+ }
+ }
+
+ return signCount > len(consensusNodes)*2/3
+}
+
+func (c *Chain) updateBlockSignature(blockHeader *types.BlockHeader, nodeOrder uint64, signature []byte) error {
+ blockHeader.Set(nodeOrder, signature)
+ if err := c.store.SaveBlockHeader(blockHeader); err != nil {
return err
}
- if exist, _ := blockNode.BlockWitness.Test(uint32(consensusNode.Order)); exist {
+ if !c.isIrreversible(blockHeader) || blockHeader.Height <= c.lastIrrBlockHeader.Height {
return nil
}
- c.cond.L.Lock()
- defer c.cond.L.Unlock()
- if err := c.checkNodeSign(blockNode.BlockHeader(), consensusNode, signature); err != nil {
- return err
- }
+ if c.InMainChain(blockHeader.Hash()) {
+ if err := c.store.SaveChainStatus(c.bestBlockHeader, blockHeader, []*types.BlockHeader{}, state.NewUtxoViewpoint(), []*state.ConsensusResult{}); err != nil {
+ return err
+ }
- if err := c.updateBlockSignature(blockNode, consensusNode.Order, signature); err != nil {
- return err
+ c.lastIrrBlockHeader = blockHeader
+ } else {
+ // block is on a forked chain
+ log.WithFields(log.Fields{"module": logModule}).Info("majority votes received on forked chain")
+ tail, err := c.traceLongestChainTail(blockHeader)
+ if err != nil {
+ return err
+ }
+
+ return c.reorganizeChain(tail)
}
- return c.eventDispatcher.Post(event.BlockSignatureEvent{BlockHash: *blockHash, Signature: signature, XPub: xPub})
+ return nil
}
// validateSign verify the signatures of block, and return the number of correct signature
// if some signature is invalid, they will be reset to nil
-// if the block has not the signature of blocker, it will return error
+// if the block does not have the signature of blocker, it will return error
func (c *Chain) validateSign(block *types.Block) error {
- consensusNodeMap, err := c.consensusNodeManager.getConsensusNodes(&block.PreviousBlockHash)
+ consensusNodeMap, err := c.getConsensusNodes(&block.PreviousBlockHash)
+ if err != nil {
+ return err
+ }
+
+ blocker, err := c.GetBlocker(&block.PreviousBlockHash, block.Timestamp)
if err != nil {
return err
}
hasBlockerSign := false
blockHash := block.Hash()
for pubKey, node := range consensusNodeMap {
- if len(block.Witness) <= int(node.Order) {
- continue
- }
-
- if block.Witness[node.Order] == nil {
+ if block.BlockWitness.Get(node.Order) == nil {
cachekey := signCacheKey(blockHash.String(), pubKey)
if signature, ok := c.signatureCache.Get(cachekey); ok {
- block.Witness[node.Order] = signature.([]byte)
+ block.Set(node.Order, signature.([]byte))
+ c.eventDispatcher.Post(event.BlockSignatureEvent{BlockHash: blockHash, Signature: signature.([]byte), XPub: node.XPub[:]})
+ c.signatureCache.Remove(cachekey)
} else {
continue
}
}
- if err := c.checkNodeSign(&block.BlockHeader, node, block.Witness[node.Order]); err == errDoubleSignBlock {
+ if err := c.checkNodeSign(&block.BlockHeader, node, block.Get(node.Order)); err == errDoubleSignBlock {
log.WithFields(log.Fields{"module": logModule, "blockHash": blockHash.String(), "pubKey": pubKey}).Warn("the consensus node double sign the same height of different block")
- block.Witness[node.Order] = nil
+ block.BlockWitness.Delete(node.Order)
continue
} else if err != nil {
return err
}
- isBlocker, err := c.IsBlocker(&block.PreviousBlockHash, pubKey, block.Timestamp)
- if err != nil {
- return err
- }
-
- if isBlocker {
+ if blocker == pubKey {
hasBlockerSign = true
}
-
}
if !hasBlockerSign {
return nil
}
-func (c *Chain) checkNodeSign(bh *types.BlockHeader, consensusNode *state.ConsensusNode, signature []byte) error {
- if !consensusNode.XPub.Verify(bh.Hash().Bytes(), signature) {
- return errInvalidSignature
- }
+// ProcessBlockSignature process the received block signature messages
+// return whether a block become irreversible, if so, the chain module must update status
+func (c *Chain) ProcessBlockSignature(signature, xPub []byte, blockHash *bc.Hash) error {
+ xpubStr := hex.EncodeToString(xPub[:])
+ blockHeader, _ := c.store.GetBlockHeader(blockHash)
- blockNodes := c.consensusNodeManager.blockIndex.NodesByHeight(bh.Height)
- for _, blockNode := range blockNodes {
- if blockNode.Hash == bh.Hash() {
- continue
+ // save the signature if the block is not exist
+ if blockHeader == nil {
+ var xPubKey chainkd.XPub
+ copy(xPubKey[:], xPub[:])
+ if !xPubKey.Verify(blockHash.Bytes(), signature) {
+ return errInvalidSignature
}
- consensusNode, err := c.consensusNodeManager.getConsensusNode(&blockNode.Parent.Hash, consensusNode.XPub.String())
- if err != nil && err != errNotFoundConsensusNode {
- return err
- }
+ cacheKey := signCacheKey(blockHash.String(), xpubStr)
+ c.signatureCache.Add(cacheKey, signature)
+ return nil
+ }
- if err == errNotFoundConsensusNode {
- continue
- }
+ consensusNode, err := c.getConsensusNode(&blockHeader.PreviousBlockHash, xpubStr)
+ if err != nil {
+ return err
+ }
- if ok, err := blockNode.BlockWitness.Test(uint32(consensusNode.Order)); err == nil && ok {
- return errDoubleSignBlock
- }
+ if blockHeader.BlockWitness.Get(consensusNode.Order) != nil {
+ return nil
}
- return nil
+
+ c.cond.L.Lock()
+ defer c.cond.L.Unlock()
+ if err := c.checkNodeSign(blockHeader, consensusNode, signature); err != nil {
+ return err
+ }
+
+ if err := c.updateBlockSignature(blockHeader, consensusNode.Order, signature); err != nil {
+ return err
+ }
+ return c.eventDispatcher.Post(event.BlockSignatureEvent{BlockHash: *blockHash, Signature: signature, XPub: xPub})
}
// SignBlock signing the block if current node is consensus node
func (c *Chain) SignBlock(block *types.Block) ([]byte, error) {
xprv := config.CommonConfig.PrivateKey()
xpubStr := xprv.XPub().String()
- node, err := c.consensusNodeManager.getConsensusNode(&block.PreviousBlockHash, xpubStr)
+ node, err := c.getConsensusNode(&block.PreviousBlockHash, xpubStr)
if err == errNotFoundConsensusNode {
return nil, nil
} else if err != nil {
return nil, err
}
- c.cond.L.Lock()
- defer c.cond.L.Unlock()
- //check double sign in same block height
- blockNodes := c.consensusNodeManager.blockIndex.NodesByHeight(block.Height)
- for _, blockNode := range blockNodes {
- // Has already signed the same height block
- if ok, err := blockNode.BlockWitness.Test(uint32(node.Order)); err == nil && ok {
- return nil, nil
- }
- }
-
- for blockNode := c.index.GetNode(&block.PreviousBlockHash); !c.index.InMainchain(blockNode.Hash); blockNode = blockNode.Parent {
- if blockNode.Height <= c.bestIrreversibleNode.Height {
- return nil, errSignForkChain
- }
+ if err := c.checkDoubleSign(&block.BlockHeader, node.XPub.String()); err == errDoubleSignBlock {
+ return nil, nil
+ } else if err != nil {
+ return nil, err
}
- signature := block.Witness[node.Order]
+ signature := block.Get(node.Order)
if len(signature) == 0 {
signature = xprv.Sign(block.Hash().Bytes())
- block.Witness[node.Order] = signature
+ block.Set(node.Order, signature)
}
return signature, nil
}
-
-func (c *Chain) updateBlockSignature(blockNode *state.BlockNode, nodeOrder uint64, signature []byte) error {
- if err := blockNode.BlockWitness.Set(uint32(nodeOrder)); err != nil {
- return err
- }
-
- block, err := c.store.GetBlock(&blockNode.Hash)
- if err != nil {
- return err
- }
-
- block.Witness[nodeOrder] = signature
- txStatus, err := c.store.GetTransactionStatus(&blockNode.Hash)
- if err != nil {
- return err
- }
-
- if err := c.store.SaveBlock(block, txStatus); err != nil {
- return err
- }
-
- if c.isIrreversible(blockNode) && blockNode.Height > c.bestIrreversibleNode.Height {
- if err := c.store.SaveChainStatus(c.bestNode, blockNode, state.NewUtxoViewpoint(), []*state.VoteResult{}); err != nil {
- return err
- }
-
- c.bestIrreversibleNode = blockNode
- }
- return nil
-}
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