4 log "github.com/sirupsen/logrus"
6 "github.com/vapor/config"
7 "github.com/vapor/errors"
8 "github.com/vapor/event"
9 "github.com/vapor/protocol/bc"
10 "github.com/vapor/protocol/bc/types"
11 "github.com/vapor/protocol/state"
12 "github.com/vapor/protocol/validation"
16 // ErrBadBlock is returned when a block is invalid.
17 ErrBadBlock = errors.New("invalid block")
18 // ErrBadStateRoot is returned when the computed assets merkle root
19 // disagrees with the one declared in a block header.
20 ErrBadStateRoot = errors.New("invalid state merkle root")
23 // BlockExist check is a block in chain or orphan
24 func (c *Chain) BlockExist(hash *bc.Hash) bool {
25 if _, err := c.store.GetBlockHeader(hash); err == nil {
28 return c.orphanManage.BlockExist(hash)
31 // GetBlockByHash return a block by given hash
32 func (c *Chain) GetBlockByHash(hash *bc.Hash) (*types.Block, error) {
33 return c.store.GetBlock(hash)
36 // GetBlockByHeight return a block by given height
37 func (c *Chain) GetBlockByHeight(height uint64) (*types.Block, error) {
38 hash, err := c.store.GetMainChainHash(height)
40 return nil, errors.Wrap(err, "can't find block in given height")
42 return c.store.GetBlock(hash)
45 // GetHeaderByHash return a block header by given hash
46 func (c *Chain) GetHeaderByHash(hash *bc.Hash) (*types.BlockHeader, error) {
47 return c.store.GetBlockHeader(hash)
50 // GetHeaderByHeight return a block header by given height
51 func (c *Chain) GetHeaderByHeight(height uint64) (*types.BlockHeader, error) {
52 hash, err := c.store.GetMainChainHash(height)
54 return nil, errors.Wrap(err, "can't find block header in given height")
56 return c.store.GetBlockHeader(hash)
59 func (c *Chain) calcReorganizeChain(beginAttach *types.BlockHeader, beginDetach *types.BlockHeader) ([]*types.BlockHeader, []*types.BlockHeader, error) {
61 var attachBlockHeaders []*types.BlockHeader
62 var detachBlockHeaders []*types.BlockHeader
64 for attachBlockHeader, detachBlockHeader := beginAttach, beginDetach; detachBlockHeader.Hash() != attachBlockHeader.Hash(); {
65 var attachRollback, detachRollBack bool
66 if attachRollback = attachBlockHeader.Height >= detachBlockHeader.Height; attachRollback {
67 attachBlockHeaders = append([]*types.BlockHeader{attachBlockHeader}, attachBlockHeaders...)
70 if detachRollBack = attachBlockHeader.Height <= detachBlockHeader.Height; detachRollBack {
71 detachBlockHeaders = append(detachBlockHeaders, detachBlockHeader)
75 attachBlockHeader, err = c.store.GetBlockHeader(&attachBlockHeader.PreviousBlockHash)
82 detachBlockHeader, err = c.store.GetBlockHeader(&detachBlockHeader.PreviousBlockHash)
88 return attachBlockHeaders, detachBlockHeaders, nil
91 func (c *Chain) connectBlock(block *types.Block) (err error) {
92 bcBlock := types.MapBlock(block)
93 if bcBlock.TransactionStatus, err = c.store.GetTransactionStatus(&bcBlock.ID); err != nil {
97 utxoView := state.NewUtxoViewpoint()
98 if err := c.store.GetTransactionsUtxo(utxoView, bcBlock.Transactions); err != nil {
101 if err := utxoView.ApplyBlock(bcBlock, bcBlock.TransactionStatus); err != nil {
105 consensusResult, err := c.getBestConsensusResult()
109 if err := consensusResult.ApplyBlock(block); err != nil {
113 for _, p := range c.subProtocols {
114 if err := c.syncProtocolStatus(p); err != nil {
115 return errors.Wrap(err, p.Name(), "sync sub protocol status")
118 if err := p.ApplyBlock(block); err != nil {
119 return errors.Wrap(err, p.Name(), "sub protocol connect block")
123 irrBlockHeader := c.lastIrrBlockHeader
124 if c.isIrreversible(&block.BlockHeader) && block.Height > irrBlockHeader.Height {
125 irrBlockHeader = &block.BlockHeader
128 if err := c.setState(&block.BlockHeader, irrBlockHeader, []*types.BlockHeader{&block.BlockHeader}, utxoView, []*state.ConsensusResult{consensusResult}); err != nil {
132 for _, tx := range block.Transactions {
133 c.txPool.RemoveTransaction(&tx.Tx.ID)
138 func (c *Chain) reorganizeChain(blockHeader *types.BlockHeader) error {
139 attachBlockHeaders, detachBlockHeaders, err := c.calcReorganizeChain(blockHeader, c.bestBlockHeader)
144 utxoView := state.NewUtxoViewpoint()
145 consensusResults := []*state.ConsensusResult{}
146 consensusResult, err := c.getBestConsensusResult()
151 for _, p := range c.subProtocols {
152 if err := c.syncProtocolStatus(p); err != nil {
153 return errors.Wrap(err, p.Name(), "sync sub protocol status")
157 txsToRestore := map[bc.Hash]*types.Tx{}
158 for _, detachBlockHeader := range detachBlockHeaders {
159 detachHash := detachBlockHeader.Hash()
160 b, err := c.store.GetBlock(&detachHash)
165 detachBlock := types.MapBlock(b)
166 if err := c.store.GetTransactionsUtxo(utxoView, detachBlock.Transactions); err != nil {
170 txStatus, err := c.GetTransactionStatus(&detachBlock.ID)
175 if err := utxoView.DetachBlock(detachBlock, txStatus); err != nil {
179 if err := consensusResult.DetachBlock(b); err != nil {
183 for _, p := range c.subProtocols {
184 if err := p.DetachBlock(b); err != nil {
185 return errors.Wrap(err, p.Name(), "sub protocol detach block")
189 for _, tx := range b.Transactions {
190 txsToRestore[tx.ID] = tx
193 blockHash := blockHeader.Hash()
194 log.WithFields(log.Fields{"module": logModule, "height": blockHeader.Height, "hash": blockHash.String()}).Debug("detach from mainchain")
197 txsToRemove := map[bc.Hash]*types.Tx{}
198 irrBlockHeader := c.lastIrrBlockHeader
199 for _, attachBlockHeader := range attachBlockHeaders {
200 attachHash := attachBlockHeader.Hash()
201 b, err := c.store.GetBlock(&attachHash)
206 attachBlock := types.MapBlock(b)
207 if err := c.store.GetTransactionsUtxo(utxoView, attachBlock.Transactions); err != nil {
211 txStatus, err := c.GetTransactionStatus(&attachBlock.ID)
216 if err := utxoView.ApplyBlock(attachBlock, txStatus); err != nil {
220 if err := consensusResult.ApplyBlock(b); err != nil {
224 for _, p := range c.subProtocols {
225 if err := p.ApplyBlock(b); err != nil {
226 return errors.Wrap(err, p.Name(), "sub protocol attach block")
230 if consensusResult.IsFinalize() {
231 consensusResults = append(consensusResults, consensusResult.Fork())
234 if c.isIrreversible(attachBlockHeader) && attachBlockHeader.Height > irrBlockHeader.Height {
235 irrBlockHeader = attachBlockHeader
238 for _, tx := range b.Transactions {
239 if _, ok := txsToRestore[tx.ID]; !ok {
240 txsToRemove[tx.ID] = tx
242 delete(txsToRestore, tx.ID)
246 blockHash := blockHeader.Hash()
247 log.WithFields(log.Fields{"module": logModule, "height": blockHeader.Height, "hash": blockHash.String()}).Debug("attach from mainchain")
250 if len(detachBlockHeaders) > 0 &&
251 detachBlockHeaders[len(detachBlockHeaders)-1].Height <= c.lastIrrBlockHeader.Height &&
252 irrBlockHeader.Height <= c.lastIrrBlockHeader.Height {
253 return errors.New("rollback block below the height of irreversible block")
256 consensusResults = append(consensusResults, consensusResult.Fork())
257 if err := c.setState(blockHeader, irrBlockHeader, attachBlockHeaders, utxoView, consensusResults); err != nil {
261 for txHash := range txsToRemove {
262 c.txPool.RemoveTransaction(&txHash)
265 for _, tx := range txsToRestore {
266 // the number of restored Tx should be very small or most of time ZERO
267 // Error returned from validation is ignored, tx could still be lost if validation fails.
268 // TODO: adjust tx timestamp so that it won't starve in pool.
269 if _, err := c.validateTx(tx, blockHeader); err != nil {
270 log.WithFields(log.Fields{"module": logModule, "tx_id": tx.Tx.ID.String(), "error": err}).Info("restore tx fail")
274 if len(txsToRestore) > 0 {
275 log.WithFields(log.Fields{"module": logModule, "num": len(txsToRestore)}).Debug("restore txs back to pool")
280 // SaveBlock will validate and save block into storage
281 func (c *Chain) saveBlock(block *types.Block) error {
282 if err := c.validateSign(block); err != nil {
283 return errors.Sub(ErrBadBlock, err)
286 parent, err := c.store.GetBlockHeader(&block.PreviousBlockHash)
291 consensusResult, err := c.GetConsensusResultByHash(&block.PreviousBlockHash)
296 rewards, err := consensusResult.GetCoinbaseRewards(parent.Height)
301 bcBlock := types.MapBlock(block)
302 if err := validation.ValidateBlock(bcBlock, parent, rewards); err != nil {
303 return errors.Sub(ErrBadBlock, err)
306 signature, err := c.SignBlock(block)
308 return errors.Sub(ErrBadBlock, err)
311 for _, p := range c.subProtocols {
312 if err := p.ValidateBlock(block, bcBlock.TransactionStatus.GetVerifyStatus()); err != nil {
313 return errors.Wrap(err, "sub protocol save block")
317 if err := c.store.SaveBlock(block, bcBlock.TransactionStatus); err != nil {
320 c.orphanManage.Delete(&bcBlock.ID)
322 if len(signature) != 0 {
323 xPub := config.CommonConfig.PrivateKey().XPub()
324 if err := c.eventDispatcher.Post(event.BlockSignatureEvent{BlockHash: block.Hash(), Signature: signature, XPub: xPub[:]}); err != nil {
331 func (c *Chain) saveSubBlock(block *types.Block) *types.Block {
332 blockHash := block.Hash()
333 prevOrphans, ok := c.orphanManage.GetPrevOrphans(&blockHash)
339 for _, prevOrphan := range prevOrphans {
340 orphanBlock, ok := c.orphanManage.Get(prevOrphan)
342 log.WithFields(log.Fields{"module": logModule, "hash": prevOrphan.String()}).Warning("saveSubBlock fail to get block from orphanManage")
345 if err := c.saveBlock(orphanBlock); err != nil {
346 log.WithFields(log.Fields{"module": logModule, "hash": prevOrphan.String(), "height": orphanBlock.Height}).Warning("saveSubBlock fail to save block")
350 if subBestBlock := c.saveSubBlock(orphanBlock); subBestBlock.Height > bestBlock.Height {
351 bestBlock = subBestBlock
357 type processBlockResponse struct {
362 type processBlockMsg struct {
364 reply chan processBlockResponse
367 // ProcessBlock is the entry for chain update
368 func (c *Chain) ProcessBlock(block *types.Block) (bool, error) {
369 reply := make(chan processBlockResponse, 1)
370 c.processBlockCh <- &processBlockMsg{block: block, reply: reply}
372 return response.isOrphan, response.err
375 func (c *Chain) blockProcesser() {
376 for msg := range c.processBlockCh {
377 isOrphan, err := c.processBlock(msg.block)
378 msg.reply <- processBlockResponse{isOrphan: isOrphan, err: err}
382 // ProcessBlock is the entry for handle block insert
383 func (c *Chain) processBlock(block *types.Block) (bool, error) {
384 blockHash := block.Hash()
385 if c.BlockExist(&blockHash) {
386 log.WithFields(log.Fields{"module": logModule, "hash": blockHash.String(), "height": block.Height}).Debug("block has been processed")
387 return c.orphanManage.BlockExist(&blockHash), nil
390 c.markTransactions(block.Transactions...)
392 if _, err := c.store.GetBlockHeader(&block.PreviousBlockHash); err != nil {
393 c.orphanManage.Add(block)
397 if err := c.saveBlock(block); err != nil {
401 bestBlock := c.saveSubBlock(block)
402 bestBlockHeader := &bestBlock.BlockHeader
405 defer c.cond.L.Unlock()
406 if bestBlockHeader.PreviousBlockHash == c.bestBlockHeader.Hash() {
407 log.WithFields(log.Fields{"module": logModule}).Debug("append block to the end of mainchain")
408 return false, c.connectBlock(bestBlock)
411 if bestBlockHeader.Height > c.bestBlockHeader.Height {
412 log.WithFields(log.Fields{"module": logModule}).Debug("start to reorganize chain")
413 return false, c.reorganizeChain(bestBlockHeader)