"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"
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")
)
func signCacheKey(blockHash, pubkey string) string {
}
func (c *Chain) isIrreversible(blockNode *state.BlockNode) bool {
- consensusNodes, err := c.consensusNodeManager.getConsensusNodesByVoteResult(&blockNode.Parent.Hash)
+ consensusNodes, err := c.consensusNodeManager.getConsensusNodes(&blockNode.Parent.Hash)
if err != nil {
return false
}
return signCount > len(consensusNodes)*2/3
}
-// 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)
+// 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)
+}
+
+// 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
+ }
+ return xPub == pubKey, nil
+}
+
+// GetBlock return blocker by specified timestamp
+func (c *Chain) GetBlocker(prevBlockHash *bc.Hash, timestamp uint64) (string, error) {
+ return c.consensusNodeManager.getBlocker(prevBlockHash, timestamp)
}
// 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 {
+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
return err
}
- if consensusNode.XPub.Verify(blockHash.Bytes(), signature) {
- return errInvalidSignature
+ if exist, _ := blockNode.BlockWitness.Test(uint32(consensusNode.Order)); exist {
+ return nil
}
- isDoubleSign, err := c.checkDoubleSign(consensusNode.Order, blockNode.Height, *blockHash)
- if err != nil {
+ c.cond.L.Lock()
+ defer c.cond.L.Unlock()
+ if err := c.checkNodeSign(blockNode.BlockHeader(), consensusNode, signature); err != nil {
return err
}
- if isDoubleSign {
- return errDoubleSignBlock
- }
-
- if err := c.updateBlockSignature(&blockNode.Hash, consensusNode.Order, signature); err != nil {
+ if err := c.updateBlockSignature(blockNode, consensusNode.Order, signature); 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 {
- return err
- }
-
- c.bestIrreversibleNode = bestIrreversibleNode
- }
- return nil
+ return c.eventDispatcher.Post(event.BlockSignatureEvent{BlockHash: *blockHash, Signature: signature, XPub: xPub})
}
// 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.getConsensusNodesByVoteResult(&block.PreviousBlockHash)
+func (c *Chain) validateSign(block *types.Block) error {
+ consensusNodeMap, err := c.consensusNodeManager.getConsensusNodes(&block.PreviousBlockHash)
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.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))
} 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.Delete(node.Order)
continue
+ } else if err != nil {
+ return err
}
- signCount++
- isBlocker, err := c.consensusNodeManager.isBlocker(&block.PreviousBlockHash, pubKey, block.Timestamp)
+ isBlocker, err := c.IsBlocker(&block.PreviousBlockHash, pubKey, block.Timestamp)
if err != nil {
- return 0, err
+ return err
}
if isBlocker {
}
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)
+func (c *Chain) checkNodeSign(bh *types.BlockHeader, consensusNode *state.ConsensusNode, signature []byte) error {
+ if !consensusNode.XPub.Verify(bh.Hash().Bytes(), signature) {
+ return errInvalidSignature
+ }
+
+ blockNodes := c.consensusNodeManager.blockIndex.NodesByHeight(bh.Height)
for _, blockNode := range blockNodes {
- if blockNode.Hash == blockHash {
+ if blockNode.Hash == bh.Hash() {
continue
}
- if ok, err := blockNode.BlockWitness.Test(uint32(nodeOrder)); err != nil && ok {
- if err := c.updateBlockSignature(&blockHash, nodeOrder, nil); err != nil {
- return false, err
- }
- return true, nil
+ consensusNode, err := c.consensusNodeManager.getConsensusNode(&blockNode.Parent.Hash, consensusNode.XPub.String())
+ if err != nil && err != errNotFoundConsensusNode {
+ return err
+ }
+
+ if err == errNotFoundConsensusNode {
+ continue
+ }
+
+ if ok, err := blockNode.BlockWitness.Test(uint32(consensusNode.Order)); err == nil && ok {
+ return errDoubleSignBlock
}
}
- return false, nil
+ return 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
- }
-
- if node == nil {
+ xpubStr := xprv.XPub().String()
+ node, err := c.consensusNodeManager.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 {
+ if ok, err := blockNode.BlockWitness.Test(uint32(node.Order)); err == nil && ok {
return nil, nil
}
}
- signature := block.Witness[node.Order]
+ for blockNode := c.index.GetNode(&block.PreviousBlockHash); !c.index.InMainchain(blockNode.Hash); blockNode = blockNode.Parent {
+ if blockNode.Height <= c.bestIrreversibleNode.Height {
+ return nil, errSignForkChain
+ }
+ }
+
+ 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(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
- }
+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(blockHash)
+ blockHeader, err := c.store.GetBlockHeader(&blockNode.Hash, blockNode.Height)
if err != nil {
return err
}
- block.Witness[nodeOrder] = signature
- txStatus, err := c.consensusNodeManager.store.GetTransactionStatus(blockHash)
- if err != nil {
+ blockHeader.Set(nodeOrder, signature)
+
+ if err := c.store.SaveBlockHeader(blockHeader); err != nil {
return err
}
- return c.consensusNodeManager.store.SaveBlock(block, txStatus)
+ 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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