log "github.com/sirupsen/logrus"
- "github.com/vapor/common"
- "github.com/vapor/config"
- "github.com/vapor/event"
- "github.com/vapor/protocol/bc"
- "github.com/vapor/protocol/bc/types"
- "github.com/vapor/protocol/state"
+ "github.com/bytom/vapor/common"
+ "github.com/bytom/vapor/config"
+ "github.com/bytom/vapor/consensus"
+ "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 (
- maxProcessBlockChSize = 1024
- maxKnownTxs = 32768 // Maximum transactions hashes to keep in the known list (prevent DOS)
+ maxProcessBlockChSize = 1024
+ maxKnownTxs = 32768 // Maximum transactions hashes to keep in the known list (prevent DOS)
+ maxPrevRoundVoteBlockHashCacheSize = 32768
)
+// ErrNotInitSubProtocolChainStatus represent the node state of sub protocol has not been initialized
+var ErrNotInitSubProtocolChainStatus = errors.New("node state of sub protocol has not been initialized")
+
+// SubProtocol is interface for layer 2 consensus protocol
+type SubProtocol interface {
+ Name() string
+ StartHeight() uint64
+ BeforeProposalBlock(block *types.Block, gasLeft int64, isTimeout func() bool) ([]*types.Tx, error)
+
+ // ChainStatus return the the current block height and block hash of sub protocol.
+ // it will return ErrNotInitSubProtocolChainStatus if not initialized.
+ ChainStatus() (uint64, *bc.Hash, error)
+ InitChainStatus(*bc.Hash) error
+ ValidateBlock(block *types.Block, verifyResults []*bc.TxVerifyResult) error
+ ValidateTx(tx *types.Tx, verifyResult *bc.TxVerifyResult, blockHeight uint64) error
+ ApplyBlock(block *types.Block) error
+ DetachBlock(block *types.Block) error
+}
+
// Chain provides functions for working with the Bytom block chain.
type Chain struct {
orphanManage *OrphanManage
txPool *TxPool
store Store
processBlockCh chan *processBlockMsg
+ subProtocols []SubProtocol
- signatureCache *common.Cache
- eventDispatcher *event.Dispatcher
+ signatureCache *common.Cache
+ prevRoundVoteBlockHashCache *common.Cache
+ eventDispatcher *event.Dispatcher
cond sync.Cond
bestBlockHeader *types.BlockHeader // the last block on current main chain
}
// NewChain returns a new Chain using store as the underlying storage.
-func NewChain(store Store, txPool *TxPool, eventDispatcher *event.Dispatcher) (*Chain, error) {
+func NewChain(store Store, txPool *TxPool, subProtocols []SubProtocol, eventDispatcher *event.Dispatcher) (*Chain, error) {
knownTxs, _ := common.NewOrderedSet(maxKnownTxs)
c := &Chain{
- orphanManage: NewOrphanManage(),
- txPool: txPool,
- store: store,
- signatureCache: common.NewCache(maxSignatureCacheSize),
- eventDispatcher: eventDispatcher,
- processBlockCh: make(chan *processBlockMsg, maxProcessBlockChSize),
- knownTxs: knownTxs,
+ orphanManage: NewOrphanManage(),
+ txPool: txPool,
+ store: store,
+ subProtocols: subProtocols,
+ signatureCache: common.NewCache(maxSignatureCacheSize),
+ prevRoundVoteBlockHashCache: common.NewCache(maxPrevRoundVoteBlockHashCacheSize),
+ eventDispatcher: eventDispatcher,
+ processBlockCh: make(chan *processBlockMsg, maxProcessBlockChSize),
+ knownTxs: knownTxs,
}
c.cond.L = new(sync.Mutex)
if err != nil {
return nil, err
}
+
+ for _, p := range c.subProtocols {
+ if err := c.syncProtocolStatus(p); err != nil {
+ return nil, errors.Wrap(err, p.Name(), "sync sub protocol status")
+ }
+ }
+
go c.blockProcesser()
return c, nil
}
return err
}
- consensusResults := []*state.ConsensusResult{&state.ConsensusResult{
+ for _, subProtocol := range c.subProtocols {
+ if err := subProtocol.ApplyBlock(genesisBlock); err != nil {
+ return err
+ }
+ }
+
+ consensusResults := []*state.ConsensusResult{{
Seq: 0,
NumOfVote: make(map[string]uint64),
CoinbaseReward: make(map[string]uint64),
return c.store.SaveChainStatus(genesisBlockHeader, genesisBlockHeader, []*types.BlockHeader{genesisBlockHeader}, utxoView, consensusResults)
}
+// getPrevRoundVoteBlockHash return the previous round block hash by the given block header
+func (c *Chain) getPrevRoundVoteBlockHash(hash *bc.Hash) (*bc.Hash, error) {
+ if data, ok := c.prevRoundVoteBlockHashCache.Get(*hash); ok {
+ return data.(*bc.Hash), nil
+ }
+
+ header, err := c.store.GetBlockHeader(hash)
+ if err != nil {
+ return nil, errNotFoundBlockNode
+ }
+
+ if header.Height%consensus.ActiveNetParams.RoundVoteBlockNums == 0 {
+ c.prevRoundVoteBlockHashCache.Add(*hash, hash)
+ return hash, nil
+ }
+
+ if data, ok := c.prevRoundVoteBlockHashCache.Get(header.PreviousBlockHash); ok {
+ c.prevRoundVoteBlockHashCache.Add(*hash, data.(*bc.Hash))
+ return data.(*bc.Hash), nil
+ }
+
+ // loop find the prev round vote block hash
+ for header.Height%consensus.ActiveNetParams.RoundVoteBlockNums != 0 {
+ header, err = c.store.GetBlockHeader(&header.PreviousBlockHash)
+ if err != nil {
+ return nil, err
+ }
+ }
+ preRoundVoteBlockHash := header.Hash()
+ c.prevRoundVoteBlockHashCache.Add(*hash, &preRoundVoteBlockHash)
+ return &preRoundVoteBlockHash, nil
+}
+
// BestBlockHeight returns the current height of the blockchain.
func (c *Chain) BestBlockHeight() uint64 {
c.cond.L.Lock()
return *blockHash == hash
}
+// SubProtocols return list of layer 2 consensus protocol
+func (c *Chain) SubProtocols() []SubProtocol {
+ return c.subProtocols
+}
+
// trace back to the tail of the chain from the given block header
func (c *Chain) traceLongestChainTail(blockHeader *types.BlockHeader) (*types.BlockHeader, error) {
longestTail, workQueue := blockHeader, []*types.BlockHeader{blockHeader}
}
}
+func (c *Chain) syncProtocolStatus(subProtocol SubProtocol) error {
+ if c.bestBlockHeader.Height < subProtocol.StartHeight() {
+ return nil
+ }
+
+ protocolHeight, protocolHash, err := subProtocol.ChainStatus()
+ if err == ErrNotInitSubProtocolChainStatus {
+ startHash, err := c.store.GetMainChainHash(subProtocol.StartHeight())
+ if err != nil {
+ return errors.Wrap(err, subProtocol.Name(), "can't get block hash by height")
+ }
+
+ if err := subProtocol.InitChainStatus(startHash); err != nil {
+ return errors.Wrap(err, subProtocol.Name(), "fail init chain status")
+ }
+
+ protocolHeight, protocolHash = subProtocol.StartHeight(), startHash
+ } else if err != nil {
+ return errors.Wrap(err, subProtocol.Name(), "can't get chain status")
+ }
+
+ if *protocolHash == c.bestBlockHeader.Hash() {
+ return nil
+ }
+
+ for !c.InMainChain(*protocolHash) {
+ block, err := c.GetBlockByHash(protocolHash)
+ if err != nil {
+ return errors.Wrap(err, subProtocol.Name(), "can't get block by hash in chain")
+ }
+
+ if err := subProtocol.DetachBlock(block); err != nil {
+ return errors.Wrap(err, subProtocol.Name(), "sub protocol detach block err")
+ }
+
+ protocolHeight, protocolHash = block.Height-1, &block.PreviousBlockHash
+ }
+
+ for height := protocolHeight + 1; height <= c.bestBlockHeader.Height; height++ {
+ block, err := c.GetBlockByHeight(height)
+ if err != nil {
+ return errors.Wrap(err, subProtocol.Name(), "can't get block by height in chain")
+ }
+
+ if err := subProtocol.ApplyBlock(block); err != nil {
+ return errors.Wrap(err, subProtocol.Name(), "sub protocol apply block err")
+ }
+
+ blockHash := block.Hash()
+ protocolHeight, protocolHash = block.Height, &blockHash
+ }
+
+ return nil
+}
+
// This function must be called with mu lock in above level
func (c *Chain) setState(blockHeader, irrBlockHeader *types.BlockHeader, mainBlockHeaders []*types.BlockHeader, view *state.UtxoViewpoint, consensusResults []*state.ConsensusResult) error {
if err := c.store.SaveChainStatus(blockHeader, irrBlockHeader, mainBlockHeaders, view, consensusResults); err != nil {
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