log "github.com/sirupsen/logrus"
- "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/event"
+ "github.com/bytom/vapor/protocol/bc"
+ "github.com/bytom/vapor/protocol/bc/types"
+ "github.com/bytom/vapor/protocol/state"
)
-const maxProcessBlockChSize = 1024
+const (
+ maxProcessBlockChSize = 1024
+ maxKnownTxs = 32768 // Maximum transactions hashes to keep in the known list (prevent DOS)
+)
// Chain provides functions for working with the Bytom block chain.
type Chain struct {
- index *state.BlockIndex
orphanManage *OrphanManage
txPool *TxPool
store Store
- bbft *bbft
processBlockCh chan *processBlockMsg
- cond sync.Cond
- bestNode *state.BlockNode
- bestIrreversibleNode *state.BlockNode
+ signatureCache *common.Cache
+ eventDispatcher *event.Dispatcher
+
+ cond sync.Cond
+ bestBlockHeader *types.BlockHeader // the last block on current main chain
+ lastIrrBlockHeader *types.BlockHeader // the last irreversible block
+
+ knownTxs *common.OrderedSet
}
// NewChain returns a new Chain using store as the underlying storage.
func NewChain(store Store, txPool *TxPool, eventDispatcher *event.Dispatcher) (*Chain, error) {
+ knownTxs, _ := common.NewOrderedSet(maxKnownTxs)
c := &Chain{
- orphanManage: NewOrphanManage(),
- txPool: txPool,
- store: store,
- processBlockCh: make(chan *processBlockMsg, maxProcessBlockChSize),
+ orphanManage: NewOrphanManage(),
+ txPool: txPool,
+ store: store,
+ signatureCache: common.NewCache(maxSignatureCacheSize),
+ eventDispatcher: eventDispatcher,
+ processBlockCh: make(chan *processBlockMsg, maxProcessBlockChSize),
+ knownTxs: knownTxs,
}
c.cond.L = new(sync.Mutex)
}
var err error
- if c.index, err = store.LoadBlockIndex(storeStatus.Height); err != nil {
+ c.bestBlockHeader, err = c.store.GetBlockHeader(storeStatus.Hash)
+ if err != nil {
return nil, err
}
- c.bestNode = c.index.GetNode(storeStatus.Hash)
- c.index.SetMainChain(c.bestNode)
- c.bbft = newBbft(store, c.index, c.orphanManage, eventDispatcher)
+ c.lastIrrBlockHeader, err = c.store.GetBlockHeader(storeStatus.IrreversibleHash)
+ if err != nil {
+ return nil, err
+ }
go c.blockProcesser()
return c, nil
}
return err
}
- node, err := state.NewBlockNode(&genesisBlock.BlockHeader, nil)
- if err != nil {
- return err
- }
- return c.store.SaveChainStatus(node, node, utxoView, map[uint64]*state.VoteResult{})
+ consensusResults := []*state.ConsensusResult{&state.ConsensusResult{
+ Seq: 0,
+ NumOfVote: make(map[string]uint64),
+ CoinbaseReward: make(map[string]uint64),
+ BlockHash: genesisBlock.Hash(),
+ BlockHeight: 0,
+ }}
+
+ genesisBlockHeader := &genesisBlock.BlockHeader
+ return c.store.SaveChainStatus(genesisBlockHeader, genesisBlockHeader, []*types.BlockHeader{genesisBlockHeader}, utxoView, consensusResults)
}
// BestBlockHeight returns the current height of the blockchain.
func (c *Chain) BestBlockHeight() uint64 {
c.cond.L.Lock()
defer c.cond.L.Unlock()
- return c.bestNode.Height
+ return c.bestBlockHeader.Height
}
-// BestBlockHash return the hash of the chain tail block
+// BestBlockHash return the hash of the main chain tail block
func (c *Chain) BestBlockHash() *bc.Hash {
c.cond.L.Lock()
defer c.cond.L.Unlock()
- return &c.bestNode.Hash
+ bestHash := c.bestBlockHeader.Hash()
+ return &bestHash
+}
+
+// LastIrreversibleHeader returns the chain last irreversible block header
+func (c *Chain) LastIrreversibleHeader() *types.BlockHeader {
+ c.cond.L.Lock()
+ defer c.cond.L.Unlock()
+ return c.lastIrrBlockHeader
}
-// BestBlockHeader returns the chain tail block
+// BestBlockHeader returns the chain best block header
func (c *Chain) BestBlockHeader() *types.BlockHeader {
- node := c.index.BestNode()
- return node.BlockHeader()
+ c.cond.L.Lock()
+ defer c.cond.L.Unlock()
+ return c.bestBlockHeader
}
// InMainChain checks wheather a block is in the main chain
func (c *Chain) InMainChain(hash bc.Hash) bool {
- return c.index.InMainchain(hash)
+ blockHeader, err := c.store.GetBlockHeader(&hash)
+ if err != nil {
+ return false
+ }
+
+ blockHash, err := c.store.GetMainChainHash(blockHeader.Height)
+ if err != nil {
+ log.WithFields(log.Fields{"module": logModule, "height": blockHeader.Height}).Debug("not contain block hash in main chain for specified height")
+ return false
+ }
+ return *blockHash == hash
}
-// This function must be called with mu lock in above level
-func (c *Chain) setState(node *state.BlockNode, irreversibleNode *state.BlockNode, view *state.UtxoViewpoint, voteMap map[uint64]*state.VoteResult) error {
- if err := c.store.SaveChainStatus(node, irreversibleNode, view, voteMap); err != nil {
- return err
+// 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}
+
+ for ; len(workQueue) > 0; workQueue = workQueue[1:] {
+ currentHeader := workQueue[0]
+ currentHash := currentHeader.Hash()
+ hashes, err := c.store.GetBlockHashesByHeight(currentHeader.Height + 1)
+ if err != nil {
+ return nil, err
+ }
+
+ for _, h := range hashes {
+ if header, err := c.store.GetBlockHeader(h); err != nil {
+ return nil, err
+ } else if header.PreviousBlockHash == currentHash {
+ if longestTail.Height < header.Height {
+ longestTail = header
+ }
+ workQueue = append(workQueue, header)
+ }
+ }
}
+ return longestTail, nil
+}
- c.cond.L.Lock()
- defer c.cond.L.Unlock()
+func (c *Chain) hasSeenTx(tx *types.Tx) bool {
+ return c.knownTxs.Has(tx.ID.String())
+}
- if err := c.bbft.UpdateConsensusNodes(node.Height); err != nil {
+func (c *Chain) markTransactions(txs ...*types.Tx) {
+ for _, tx := range txs {
+ c.knownTxs.Add(tx.ID.String())
+ }
+}
+
+// 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 {
return err
}
- c.index.SetMainChain(node)
- c.bestNode = node
- c.bestIrreversibleNode = irreversibleNode
+ c.bestBlockHeader = blockHeader
+ c.lastIrrBlockHeader = irrBlockHeader
- log.WithFields(log.Fields{"module": logModule, "height": c.bestNode.Height, "hash": c.bestNode.Hash.String()}).Debug("chain best status has been update")
+ blockHash := blockHeader.Hash()
+ log.WithFields(log.Fields{"module": logModule, "height": blockHeader.Height, "hash": blockHash.String()}).Debug("chain best status has been update")
c.cond.Broadcast()
return nil
}
go func() {
c.cond.L.Lock()
defer c.cond.L.Unlock()
- for c.bestNode.Height < height {
+ for c.bestBlockHeader.Height < height {
c.cond.Wait()
}
ch <- struct{}{}
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