log "github.com/sirupsen/logrus"
- "github.com/vapor/config"
- "github.com/vapor/errors"
- "github.com/vapor/protocol/bc"
- "github.com/vapor/protocol/bc/types"
- "github.com/vapor/protocol/state"
- "github.com/vapor/event"
+ "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")
+ 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
+ }
-// NextLeaderTime returns the start time of the specified public key as the next leader node
-func (c *Chain) IsBlocker(prevBlockHash *bc.Hash, pubkey string, timeStamp uint64) (bool, error) {
- return c.consensusNodeManager.isBlocker(prevBlockHash, pubkey, timeStamp)
+ 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
}
-// 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 []byte, xPub [64]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) checkNodeSign(bh *types.BlockHeader, consensusNode *state.ConsensusNode, signature []byte) error {
+ if !consensusNode.XPub.Verify(bh.Hash().Bytes(), signature) {
+ return errInvalidSignature
}
- consensusNode, err := c.consensusNodeManager.getConsensusNode(&blockNode.Parent.Hash, xpubStr)
+ 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 err
+ return false
}
- if exist, err := blockNode.BlockWitness.Test(uint32(consensusNode.Order)); err != nil && exist {
- return nil
+ signCount := 0
+ for i := 0; i < len(consensusNodes); i++ {
+ if blockHeader.BlockWitness.Get(uint64(i)) != nil {
+ signCount++
+ }
}
- if !consensusNode.XPub.Verify(blockHash.Bytes(), signature) {
- return errInvalidSignature
- }
+ return signCount > len(consensusNodes)*2/3
+}
- isDoubleSign, err := c.checkDoubleSign(consensusNode.Order, blockNode.Height, *blockHash)
- 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 isDoubleSign {
- return errDoubleSignBlock
+ if !c.isIrreversible(blockHeader) || blockHeader.Height <= c.lastIrrBlockHeader.Height {
+ return nil
}
- if err := c.updateBlockSignature(&blockNode.Hash, consensusNode.Order, 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 c.isIrreversible(blockNode) && blockNode.Height > c.bestIrreversibleNode.Height {
- bestIrreversibleNode := c.index.GetNode(blockHash)
- if err := c.store.SaveChainNodeStatus(c.bestNode, bestIrreversibleNode); err != nil {
+ 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
}
- c.bestIrreversibleNode = bestIrreversibleNode
+ 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
-func (c *Chain) validateSign(block *types.Block) (uint64, error) {
- consensusNodeMap, err := c.consensusNodeManager.getConsensusNodes(&block.PreviousBlockHash)
+// 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.getConsensusNodes(&block.PreviousBlockHash)
+ if err != nil {
+ return err
+ }
+
+ blocker, err := c.GetBlocker(&block.PreviousBlockHash, block.Timestamp)
if err != nil {
- return 0, err
+ return err
}
hasBlockerSign := false
- signCount := uint64(0)
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 ok := node.XPub.Verify(blockHash.Bytes(), block.Witness[node.Order]); !ok {
- block.Witness[node.Order] = nil
- continue
- }
-
- isDoubleSign, err := c.checkDoubleSign(node.Order, block.Height, block.Hash())
- if err != nil {
- return 0, err
- }
-
- if isDoubleSign {
- // Consensus node is signed twice with the same block height, discard the signature
+ 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
}
- signCount++
- isBlocker, err := c.consensusNodeManager.isBlocker(&block.PreviousBlockHash, pubKey, block.Timestamp)
- if err != nil {
- return 0, err
- }
-
- if isBlocker {
+ if blocker == pubKey {
hasBlockerSign = true
}
-
}
if !hasBlockerSign {
- return 0, errors.New("the block has no signature of the blocker")
+ return errors.New("the block has no signature of the blocker")
}
- return signCount, nil
+ return nil
}
-func (c *Chain) checkDoubleSign(nodeOrder, blockHeight uint64, blockHash bc.Hash) (bool, error) {
- blockNodes := c.consensusNodeManager.blockIndex.NodesByHeight(blockHeight)
- for _, blockNode := range blockNodes {
- if blockNode.Hash == blockHash {
- continue
- }
- if ok, err := blockNode.BlockWitness.Test(uint32(nodeOrder)); err != nil && ok {
- if err := c.updateBlockSignature(&blockHash, nodeOrder, nil); err != nil {
- return false, err
- }
+// 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)
- return true, nil
+ // 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
}
+
+ cacheKey := signCacheKey(blockHash.String(), xpubStr)
+ c.signatureCache.Add(cacheKey, signature)
+ return nil
}
- return false, nil
-}
-// SignBlock signing the block if current node is consensus node
-func (c *Chain) SignBlock(block *types.Block) ([]byte, error) {
- xprv := config.CommonConfig.PrivateKey()
- xpub := [64]byte(xprv.XPub())
- node, err := c.consensusNodeManager.getConsensusNode(&block.PreviousBlockHash, hex.EncodeToString(xpub[:]))
- if err != nil && err != errNotFoundConsensusNode {
- return nil, err
+ consensusNode, err := c.getConsensusNode(&blockHeader.PreviousBlockHash, xpubStr)
+ if err != nil {
+ return err
}
- if node == nil {
- return nil, nil
+ if blockHeader.BlockWitness.Get(consensusNode.Order) != nil {
+ return nil
}
- 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
- }
+ c.cond.L.Lock()
+ defer c.cond.L.Unlock()
+ if err := c.checkNodeSign(blockHeader, consensusNode, signature); err != nil {
+ return err
}
- signature := block.Witness[node.Order]
- if len(signature) == 0 {
- signature = xprv.Sign(block.Hash().Bytes())
- block.Witness[node.Order] = signature
+ if err := c.updateBlockSignature(blockHeader, consensusNode.Order, signature); err != nil {
+ return err
}
- return signature, nil
+ return c.eventDispatcher.Post(event.BlockSignatureEvent{BlockHash: *blockHash, Signature: signature, XPub: xPub})
}
-func (c *Chain) updateBlockSignature(blockHash *bc.Hash, nodeOrder uint64, signature []byte) error {
- blockNode := c.consensusNodeManager.blockIndex.GetNode(blockHash)
- if len(signature) != 0 {
- if err := blockNode.BlockWitness.Set(uint32(nodeOrder)); err != nil {
- return err
- }
- } else {
- if err := blockNode.BlockWitness.Clean(uint32(nodeOrder)); err != nil {
- return err
- }
+// 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.getConsensusNode(&block.PreviousBlockHash, xpubStr)
+ if err == errNotFoundConsensusNode {
+ return nil, nil
+ } else if err != nil {
+ return nil, err
}
- block, err := c.store.GetBlock(blockHash)
- if err != nil {
- return err
+ if err := c.checkDoubleSign(&block.BlockHeader, node.XPub.String()); err == errDoubleSignBlock {
+ return nil, nil
+ } else if err != nil {
+ return nil, err
}
- block.Witness[nodeOrder] = signature
- txStatus, err := c.consensusNodeManager.store.GetTransactionStatus(blockHash)
- if err != nil {
- return err
+ signature := block.Get(node.Order)
+ if len(signature) == 0 {
+ signature = xprv.Sign(block.Hash().Bytes())
+ block.Set(node.Order, signature)
}
-
- return c.consensusNodeManager.store.SaveBlock(block, txStatus)
+ return signature, nil
}
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