6 log "github.com/sirupsen/logrus"
8 "github.com/vapor/config"
9 "github.com/vapor/event"
10 "github.com/vapor/protocol/bc"
11 "github.com/vapor/protocol/bc/types"
12 "github.com/vapor/protocol/state"
13 "github.com/vapor/common"
16 const maxProcessBlockChSize = 1024
18 // Chain provides functions for working with the Bytom block chain.
20 index *state.BlockIndex
21 orphanManage *OrphanManage
24 processBlockCh chan *processBlockMsg
26 consensusNodeManager *consensusNodeManager
27 signatureCache *common.Cache
28 eventDispatcher *event.Dispatcher
31 bestNode *state.BlockNode
32 bestIrreversibleNode *state.BlockNode
35 // NewChain returns a new Chain using store as the underlying storage.
36 func NewChain(store Store, txPool *TxPool, eventDispatcher *event.Dispatcher) (*Chain, error) {
38 orphanManage: NewOrphanManage(),
41 signatureCache: common.NewCache(maxSignatureCacheSize),
42 eventDispatcher: eventDispatcher,
43 processBlockCh: make(chan *processBlockMsg, maxProcessBlockChSize),
45 c.cond.L = new(sync.Mutex)
47 storeStatus := store.GetStoreStatus()
48 if storeStatus == nil {
49 if err := c.initChainStatus(); err != nil {
52 storeStatus = store.GetStoreStatus()
56 if c.index, err = store.LoadBlockIndex(storeStatus.Height); err != nil {
60 c.bestNode = c.index.GetNode(storeStatus.Hash)
61 c.bestIrreversibleNode = c.index.GetNode(storeStatus.IrreversibleHash)
62 c.consensusNodeManager = newConsensusNodeManager(store, c.index)
63 c.index.SetMainChain(c.bestNode)
68 func (c *Chain) initChainStatus() error {
69 genesisBlock := config.GenesisBlock()
70 txStatus := bc.NewTransactionStatus()
71 for i := range genesisBlock.Transactions {
72 if err := txStatus.SetStatus(i, false); err != nil {
77 if err := c.store.SaveBlock(genesisBlock, txStatus); err != nil {
81 utxoView := state.NewUtxoViewpoint()
82 bcBlock := types.MapBlock(genesisBlock)
83 if err := utxoView.ApplyBlock(bcBlock, txStatus); err != nil {
87 voteResults := []*state.VoteResult{&state.VoteResult{
89 NumOfVote: map[string]uint64{},
90 BlockHash: genesisBlock.Hash(),
93 node, err := state.NewBlockNode(&genesisBlock.BlockHeader, nil)
98 return c.store.SaveChainStatus(node, node, utxoView, voteResults)
101 // BestBlockHeight returns the current height of the blockchain.
102 func (c *Chain) BestBlockHeight() uint64 {
104 defer c.cond.L.Unlock()
105 return c.bestNode.Height
108 // BestBlockHash return the hash of the chain tail block
109 func (c *Chain) BestBlockHash() *bc.Hash {
111 defer c.cond.L.Unlock()
112 return &c.bestNode.Hash
115 // BestBlockHeader returns the chain tail block
116 func (c *Chain) BestBlockHeader() *types.BlockHeader {
117 node := c.index.BestNode()
118 return node.BlockHeader()
121 // InMainChain checks wheather a block is in the main chain
122 func (c *Chain) InMainChain(hash bc.Hash) bool {
123 return c.index.InMainchain(hash)
126 // This function must be called with mu lock in above level
127 func (c *Chain) setState(node, irreversibleNode *state.BlockNode, view *state.UtxoViewpoint, voteResults []*state.VoteResult) error {
128 if err := c.store.SaveChainStatus(node, irreversibleNode, view, voteResults); err != nil {
132 c.index.SetMainChain(node)
134 c.bestIrreversibleNode = irreversibleNode
136 log.WithFields(log.Fields{"module": logModule, "height": c.bestNode.Height, "hash": c.bestNode.Hash.String()}).Debug("chain best status has been update")
141 // BlockWaiter returns a channel that waits for the block at the given height.
142 func (c *Chain) BlockWaiter(height uint64) <-chan struct{} {
143 ch := make(chan struct{}, 1)
146 defer c.cond.L.Unlock()
147 for c.bestNode.Height < height {
156 // GetTxPool return chain txpool.
157 func (c *Chain) GetTxPool() *TxPool {