return fmt.Sprintf("%s:%s", blockHash, pubkey)
}
+func (c *Chain) checkDoubleSign(bh *types.BlockHeader, xPub string) error {
+ blockHashes, err := c.store.GetBlockHashesByHeight(bh.Height)
+ if err != nil {
+ return err
+ }
+
+ for _, blockHash := range blockHashes {
+ if *blockHash == bh.Hash() {
+ continue
+ }
+
+ blockHeader, err := c.store.GetBlockHeader(blockHash)
+ if err != nil {
+ return err
+ }
+
+ consensusNode, err := c.getConsensusNode(&blockHeader.PreviousBlockHash, xPub)
+ if err == errNotFoundConsensusNode {
+ continue
+ } else if err != nil {
+ return err
+ }
+
+ if blockHeader.BlockWitness.Get(consensusNode.Order) != nil {
+ return errDoubleSignBlock
+ }
+ }
+ 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
+ }
+
+ return c.checkDoubleSign(bh, consensusNode.XPub.String())
+}
+
func (c *Chain) isIrreversible(blockHeader *types.BlockHeader) bool {
consensusNodes, err := c.getConsensusNodes(&blockHeader.PreviousBlockHash)
if err != nil {
return signCount > len(consensusNodes)*2/3
}
-// GetConsensusResultByHash return vote result by block hash
-func (c *Chain) GetConsensusResultByHash(blockHash *bc.Hash) (*state.ConsensusResult, error) {
- blockHeader, err := c.store.GetBlockHeader(blockHash)
- if err != nil {
- return nil, err
- }
- return c.getConsensusResult(state.CalcVoteSeq(blockHeader.Height), blockHeader)
-}
-
-// 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.GetBlocker(prevBlockHash, timeStamp)
- if err != nil {
- return false, err
- }
- return xPub == pubKey, nil
-}
-
-// 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)
-
- // save the signature if the block is not exist
- if blockHeader == nil {
- cacheKey := signCacheKey(blockHash.String(), xpubStr)
- c.signatureCache.Add(cacheKey, signature)
- return nil
- }
-
- consensusNode, err := c.getConsensusNode(&blockHeader.PreviousBlockHash, xpubStr)
- if err != nil {
+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 blockHeader.BlockWitness.Get(consensusNode.Order) != nil {
+ if !c.isIrreversible(blockHeader) || blockHeader.Height <= c.lastIrrBlockHeader.Height {
return nil
}
- c.cond.L.Lock()
- defer c.cond.L.Unlock()
- if err := c.checkNodeSign(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(blockHeader, 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
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.Get(node.Order) == nil {
+ if block.BlockWitness.Get(node.Order) == nil {
cachekey := signCacheKey(blockHash.String(), pubKey)
if signature, ok := c.signatureCache.Get(cachekey); ok {
block.Set(node.Order, signature.([]byte))
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.Delete(node.Order)
+ 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)
+
+ // save the signature if the block is not exist
+ if blockHeader == nil {
+ cacheKey := signCacheKey(blockHash.String(), xpubStr)
+ c.signatureCache.Add(cacheKey, signature)
+ return nil
}
- blockHashes, err := c.store.GetBlockHashesByHeight(bh.Height)
+ consensusNode, err := c.getConsensusNode(&blockHeader.PreviousBlockHash, xpubStr)
if err != nil {
return err
}
- for _, blockHash := range blockHashes {
- if *blockHash == bh.Hash() {
- continue
- }
-
- blockHeader, err := c.store.GetBlockHeader(blockHash)
- if err != nil {
- return err
- }
-
- consensusNode, err := c.getConsensusNode(&blockHeader.PreviousBlockHash, consensusNode.XPub.String())
- if err != nil && err != errNotFoundConsensusNode {
- return err
- }
+ if blockHeader.BlockWitness.Get(consensusNode.Order) != nil {
+ return nil
+ }
- if err == errNotFoundConsensusNode {
- continue
- }
+ c.cond.L.Lock()
+ defer c.cond.L.Unlock()
+ if err := c.checkNodeSign(blockHeader, consensusNode, signature); err != nil {
+ return err
+ }
- if blockHeader.BlockWitness.Get(consensusNode.Order) != nil {
- return errDoubleSignBlock
- }
+ if err := c.updateBlockSignature(blockHeader, consensusNode.Order, signature); err != nil {
+ return err
}
- return nil
+ return c.eventDispatcher.Post(event.BlockSignatureEvent{BlockHash: *blockHash, Signature: signature, XPub: xPub})
}
// SignBlock signing the block if current node is consensus node
return nil, err
}
- //check double sign in same block height
- blockHashes, err := c.store.GetBlockHashesByHeight(block.Height)
- if err != nil {
+ if err := c.checkDoubleSign(&block.BlockHeader, node.XPub.String()); err == errDoubleSignBlock {
+ return nil, nil
+ } else if err != nil {
return nil, err
}
- for _, hash := range blockHashes {
- blockHeader, err := c.store.GetBlockHeader(hash)
- if err != nil {
- return nil, err
- }
-
- // Has already signed the same height block
- if blockHeader.BlockWitness.Get(node.Order) != nil {
- return nil, nil
- }
- }
-
signature := block.Get(node.Order)
if len(signature) == 0 {
signature = xprv.Sign(block.Hash().Bytes())
}
return signature, nil
}
-
-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 !c.isIrreversible(blockHeader) || blockHeader.Height <= c.lastIrrBlockHeader.Height {
- return nil
- }
-
- if c.InMainChain(blockHeader.Hash()) {
- if err := c.store.SaveChainStatus(c.bestBlockHeader, blockHeader, []*types.BlockHeader{}, state.NewUtxoViewpoint(), []*state.ConsensusResult{}); 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 nil
-}
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