4 log "github.com/sirupsen/logrus"
6 "github.com/bytom/vapor/errors"
7 "github.com/bytom/vapor/protocol/bc"
8 "github.com/bytom/vapor/protocol/bc/types"
9 "github.com/bytom/vapor/protocol/state"
10 "github.com/bytom/vapor/protocol/validation"
11 "github.com/bytom/vapor/toolbar/measure"
15 // ErrBadBlock is returned when a block is invalid.
16 ErrBadBlock = errors.New("invalid block")
17 // ErrBadStateRoot is returned when the computed assets merkle root
18 // disagrees with the one declared in a block header.
19 ErrBadStateRoot = errors.New("invalid state merkle root")
22 // BlockExist check is a block in chain or orphan
23 func (c *Chain) BlockExist(hash *bc.Hash) bool {
24 if _, err := c.store.GetBlockHeader(hash); err == nil {
27 return c.orphanManage.BlockExist(hash)
30 // GetBlockByHash return a block by given hash
31 func (c *Chain) GetBlockByHash(hash *bc.Hash) (*types.Block, error) {
32 return c.store.GetBlock(hash)
35 // GetBlockByHeight return a block by given height
36 func (c *Chain) GetBlockByHeight(height uint64) (*types.Block, error) {
37 hash, err := c.store.GetMainChainHash(height)
39 return nil, errors.Wrap(err, "can't find block in given height")
41 return c.store.GetBlock(hash)
44 // GetHeaderByHash return a block header by given hash
45 func (c *Chain) GetHeaderByHash(hash *bc.Hash) (*types.BlockHeader, error) {
46 return c.store.GetBlockHeader(hash)
49 // GetHeaderByHeight return a block header by given height
50 func (c *Chain) GetHeaderByHeight(height uint64) (*types.BlockHeader, error) {
51 hash, err := c.store.GetMainChainHash(height)
53 return nil, errors.Wrap(err, "can't find block header in given height")
55 return c.store.GetBlockHeader(hash)
58 func (c *Chain) calcReorganizeChain(beginAttach *types.BlockHeader, beginDetach *types.BlockHeader) ([]*types.BlockHeader, []*types.BlockHeader, error) {
60 var attachBlockHeaders []*types.BlockHeader
61 var detachBlockHeaders []*types.BlockHeader
63 for attachBlockHeader, detachBlockHeader := beginAttach, beginDetach; detachBlockHeader.Hash() != attachBlockHeader.Hash(); {
64 var attachRollback, detachRollBack bool
65 if attachRollback = attachBlockHeader.Height >= detachBlockHeader.Height; attachRollback {
66 attachBlockHeaders = append([]*types.BlockHeader{attachBlockHeader}, attachBlockHeaders...)
69 if detachRollBack = attachBlockHeader.Height <= detachBlockHeader.Height; detachRollBack {
70 detachBlockHeaders = append(detachBlockHeaders, detachBlockHeader)
74 attachBlockHeader, err = c.store.GetBlockHeader(&attachBlockHeader.PreviousBlockHash)
81 detachBlockHeader, err = c.store.GetBlockHeader(&detachBlockHeader.PreviousBlockHash)
87 return attachBlockHeaders, detachBlockHeaders, nil
90 func (c *Chain) connectBlock(block *types.Block) (err error) {
94 bcBlock := types.MapBlock(block)
95 if bcBlock.TransactionStatus, err = c.store.GetTransactionStatus(&bcBlock.ID); err != nil {
99 utxoView := state.NewUtxoViewpoint()
100 if err := c.store.GetTransactionsUtxo(utxoView, bcBlock.Transactions); err != nil {
103 if err := utxoView.ApplyBlock(bcBlock, bcBlock.TransactionStatus); err != nil {
107 consensusResult, err := c.getBestConsensusResult()
112 if err := consensusResult.ApplyBlock(block); err != nil {
116 for _, p := range c.subProtocols {
117 if err := c.syncProtocolStatus(p); err != nil {
118 return errors.Wrap(err, p.Name(), "sync sub protocol status")
121 if err := p.ApplyBlock(block); err != nil {
122 return errors.Wrap(err, p.Name(), "sub protocol connect block")
126 if err := c.applyBlockSign(&block.BlockHeader); err != nil {
130 irrBlockHeader := c.lastIrrBlockHeader
131 if c.isIrreversible(&block.BlockHeader) && block.Height > irrBlockHeader.Height {
132 irrBlockHeader = &block.BlockHeader
135 if err := c.setState(&block.BlockHeader, irrBlockHeader, []*types.BlockHeader{&block.BlockHeader}, utxoView, []*state.ConsensusResult{consensusResult}); err != nil {
139 for _, tx := range block.Transactions {
140 c.txPool.RemoveTransaction(&tx.Tx.ID)
145 func (c *Chain) detachBlock(detachBlockHeader *types.BlockHeader, consensusResult *state.ConsensusResult, utxoView *state.UtxoViewpoint) (*types.Block, error) {
146 detachHash := detachBlockHeader.Hash()
147 block, err := c.store.GetBlock(&detachHash)
152 detachBlock := types.MapBlock(block)
153 if err := consensusResult.DetachBlock(block); err != nil {
157 if err := c.store.GetTransactionsUtxo(utxoView, detachBlock.Transactions); err != nil {
161 txStatus, err := c.GetTransactionStatus(&detachBlock.ID)
166 if err := utxoView.DetachBlock(detachBlock, txStatus); err != nil {
170 for _, p := range c.subProtocols {
171 if err := p.DetachBlock(block); err != nil {
172 return block, errors.Wrap(err, p.Name(), "sub protocol detach block")
176 log.WithFields(log.Fields{"module": logModule, "height": detachBlockHeader.Height, "hash": detachHash.String()}).Debug("detach from mainchain")
180 func (c *Chain) syncSubProtocols() error {
181 for _, p := range c.subProtocols {
182 if err := c.syncProtocolStatus(p); err != nil {
183 return errors.Wrap(err, p.Name(), "sync sub protocol status")
189 // Rollback rollback the chain from one blockHeight to targetBlockHeight
190 // WARNING: we recommend to use this only in commond line
191 func (c *Chain) Rollback(targetHeight uint64) error {
193 defer c.cond.L.Unlock()
195 utxoView := state.NewUtxoViewpoint()
196 consensusResult, err := c.getBestConsensusResult()
201 if err = c.syncSubProtocols(); err != nil {
205 targetBlockHeader, err := c.GetHeaderByHeight(targetHeight)
210 _, deletedBlockHeaders, err := c.calcReorganizeChain(targetBlockHeader, c.bestBlockHeader)
215 deletedBlocks := []*types.Block{}
216 for _, deletedBlockHeader := range deletedBlockHeaders {
217 block, err := c.detachBlock(deletedBlockHeader, consensusResult, utxoView)
222 deletedBlocks = append(deletedBlocks, block)
225 setIrrBlockHeader := c.lastIrrBlockHeader
226 if c.lastIrrBlockHeader.Height > targetBlockHeader.Height {
227 setIrrBlockHeader = targetBlockHeader
230 startSeq := state.CalcVoteSeq(c.bestBlockHeader.Height)
232 if err = c.setState(targetBlockHeader, setIrrBlockHeader, nil, utxoView, []*state.ConsensusResult{consensusResult.Fork()}); err != nil {
236 for _, block := range deletedBlocks {
237 if err := c.store.DeleteBlock(block); err != nil {
242 endSeq := state.CalcVoteSeq(targetHeight)
243 for nowSeq := startSeq; nowSeq > endSeq; nowSeq-- {
244 if err := c.store.DeleteConsensusResult(nowSeq); err != nil {
252 func (c *Chain) reorganizeChain(blockHeader *types.BlockHeader) error {
253 attachBlockHeaders, detachBlockHeaders, err := c.calcReorganizeChain(blockHeader, c.bestBlockHeader)
258 utxoView := state.NewUtxoViewpoint()
259 consensusResults := []*state.ConsensusResult{}
260 consensusResult, err := c.getBestConsensusResult()
265 if err = c.syncSubProtocols(); err != nil {
269 txsToRestore := map[bc.Hash]*types.Tx{}
270 for _, detachBlockHeader := range detachBlockHeaders {
271 b, err := c.detachBlock(detachBlockHeader, consensusResult, utxoView)
276 for _, tx := range b.Transactions {
277 txsToRestore[tx.ID] = tx
281 txsToRemove := map[bc.Hash]*types.Tx{}
282 irrBlockHeader := c.lastIrrBlockHeader
283 for _, attachBlockHeader := range attachBlockHeaders {
284 attachHash := attachBlockHeader.Hash()
285 b, err := c.store.GetBlock(&attachHash)
290 attachBlock := types.MapBlock(b)
291 if err := c.store.GetTransactionsUtxo(utxoView, attachBlock.Transactions); err != nil {
295 txStatus, err := c.GetTransactionStatus(&attachBlock.ID)
300 if err := utxoView.ApplyBlock(attachBlock, txStatus); err != nil {
304 if err := consensusResult.ApplyBlock(b); err != nil {
308 for _, p := range c.subProtocols {
309 if err := p.ApplyBlock(b); err != nil {
310 return errors.Wrap(err, p.Name(), "sub protocol attach block")
314 if consensusResult.IsFinalize() {
315 consensusResults = append(consensusResults, consensusResult.Fork())
318 if err := c.applyBlockSign(attachBlockHeader); err != nil {
322 if c.isIrreversible(attachBlockHeader) && attachBlockHeader.Height > irrBlockHeader.Height {
323 irrBlockHeader = attachBlockHeader
326 for _, tx := range b.Transactions {
327 if _, ok := txsToRestore[tx.ID]; !ok {
328 txsToRemove[tx.ID] = tx
330 delete(txsToRestore, tx.ID)
334 blockHash := blockHeader.Hash()
335 log.WithFields(log.Fields{"module": logModule, "height": blockHeader.Height, "hash": blockHash.String()}).Debug("attach from mainchain")
338 if len(detachBlockHeaders) > 0 && detachBlockHeaders[len(detachBlockHeaders)-1].Height <= c.lastIrrBlockHeader.Height && irrBlockHeader.Height <= c.lastIrrBlockHeader.Height {
339 log.WithField("module", logModule).Warn("rollback block below the height of irreversible block")
343 consensusResults = append(consensusResults, consensusResult.Fork())
344 if err := c.setState(blockHeader, irrBlockHeader, attachBlockHeaders, utxoView, consensusResults); err != nil {
348 for txHash := range txsToRemove {
349 c.txPool.RemoveTransaction(&txHash)
352 for _, tx := range txsToRestore {
353 // the number of restored Tx should be very small or most of time ZERO
354 // Error returned from validation is ignored, tx could still be lost if validation fails.
355 // TODO: adjust tx timestamp so that it won't starve in pool.
356 if _, err := c.validateTx(tx, blockHeader); err != nil {
357 log.WithFields(log.Fields{"module": logModule, "tx_id": tx.Tx.ID.String(), "error": err}).Info("restore tx fail")
361 if len(txsToRestore) > 0 {
362 log.WithFields(log.Fields{"module": logModule, "num": len(txsToRestore)}).Debug("restore txs back to pool")
367 // SaveBlock will validate and save block into storage
368 func (c *Chain) saveBlock(block *types.Block) error {
372 if err := c.validateSign(block); err != nil {
373 return errors.Sub(ErrBadBlock, err)
376 parent, err := c.store.GetBlockHeader(&block.PreviousBlockHash)
381 consensusResult, err := c.GetConsensusResultByHash(&block.PreviousBlockHash)
386 rewards, err := consensusResult.GetCoinbaseRewards(parent.Height)
391 bcBlock := types.MapBlock(block)
392 if err := validation.ValidateBlock(bcBlock, parent, rewards); err != nil {
393 return errors.Sub(ErrBadBlock, err)
396 for _, p := range c.subProtocols {
397 if err := p.ValidateBlock(block, bcBlock.TransactionStatus.GetVerifyStatus()); err != nil {
398 return errors.Wrap(err, "sub protocol save block")
402 if err := c.store.SaveBlock(block, bcBlock.TransactionStatus); err != nil {
406 c.orphanManage.Delete(&bcBlock.ID)
410 func (c *Chain) saveSubBlock(block *types.Block) *types.Block {
411 blockHash := block.Hash()
412 prevOrphans, ok := c.orphanManage.GetPrevOrphans(&blockHash)
418 for _, prevOrphan := range prevOrphans {
419 orphanBlock, ok := c.orphanManage.Get(prevOrphan)
421 log.WithFields(log.Fields{"module": logModule, "hash": prevOrphan.String()}).Warning("saveSubBlock fail to get block from orphanManage")
424 if err := c.saveBlock(orphanBlock); err != nil {
425 log.WithFields(log.Fields{"module": logModule, "hash": prevOrphan.String(), "height": orphanBlock.Height}).Warning("saveSubBlock fail to save block")
429 if subBestBlock := c.saveSubBlock(orphanBlock); subBestBlock.Height > bestBlock.Height {
430 bestBlock = subBestBlock
436 type processBlockResponse struct {
441 type processBlockMsg struct {
443 reply chan processBlockResponse
446 // ProcessBlock is the entry for chain update
447 func (c *Chain) ProcessBlock(block *types.Block) (bool, error) {
448 reply := make(chan processBlockResponse, 1)
449 c.processBlockCh <- &processBlockMsg{block: block, reply: reply}
451 return response.isOrphan, response.err
454 func (c *Chain) blockProcesser() {
455 for msg := range c.processBlockCh {
456 isOrphan, err := c.processBlock(msg.block)
457 msg.reply <- processBlockResponse{isOrphan: isOrphan, err: err}
461 // ProcessBlock is the entry for handle block insert
462 func (c *Chain) processBlock(block *types.Block) (bool, error) {
466 blockHash := block.Hash()
467 if c.BlockExist(&blockHash) {
468 log.WithFields(log.Fields{"module": logModule, "hash": blockHash.String(), "height": block.Height}).Debug("block has been processed")
469 return c.orphanManage.BlockExist(&blockHash), nil
472 c.markTransactions(block.Transactions...)
474 if _, err := c.store.GetBlockHeader(&block.PreviousBlockHash); err != nil {
475 c.orphanManage.Add(block)
479 if err := c.saveBlock(block); err != nil {
483 bestBlock := c.saveSubBlock(block)
484 bestBlockHeader := &bestBlock.BlockHeader
487 defer c.cond.L.Unlock()
488 if bestBlockHeader.PreviousBlockHash == c.bestBlockHeader.Hash() {
489 log.WithFields(log.Fields{"module": logModule}).Debug("append block to the end of mainchain")
490 return false, c.connectBlock(bestBlock)
493 if bestBlockHeader.Height > c.bestBlockHeader.Height {
494 log.WithFields(log.Fields{"module": logModule}).Debug("start to reorganize chain")
495 return false, c.reorganizeChain(bestBlockHeader)