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"
15 const maxProcessBlockChSize = 1024
17 // Chain provides functions for working with the Bytom block chain.
19 index *state.BlockIndex
20 orphanManage *OrphanManage
24 processBlockCh chan *processBlockMsg
27 bestNode *state.BlockNode
28 bestIrreversibleNode *state.BlockNode
31 // NewChain returns a new Chain using store as the underlying storage.
32 func NewChain(store Store, txPool *TxPool, eventDispatcher *event.Dispatcher) (*Chain, error) {
34 orphanManage: NewOrphanManage(),
37 processBlockCh: make(chan *processBlockMsg, maxProcessBlockChSize),
39 c.cond.L = new(sync.Mutex)
41 storeStatus := store.GetStoreStatus()
42 if storeStatus == nil {
43 if err := c.initChainStatus(); err != nil {
46 storeStatus = store.GetStoreStatus()
50 if c.index, err = store.LoadBlockIndex(storeStatus.Height); err != nil {
54 c.bestNode = c.index.GetNode(storeStatus.Hash)
55 c.index.SetMainChain(c.bestNode)
56 c.bbft = newBbft(store, c.index, c.orphanManage, eventDispatcher)
61 func (c *Chain) initChainStatus() error {
62 genesisBlock := config.GenesisBlock()
63 txStatus := bc.NewTransactionStatus()
64 for i := range genesisBlock.Transactions {
65 if err := txStatus.SetStatus(i, false); err != nil {
70 if err := c.store.SaveBlock(genesisBlock, txStatus); err != nil {
74 utxoView := state.NewUtxoViewpoint()
75 bcBlock := types.MapBlock(genesisBlock)
76 if err := utxoView.ApplyBlock(bcBlock, txStatus); err != nil {
80 node, err := state.NewBlockNode(&genesisBlock.BlockHeader, nil)
85 return c.store.SaveChainStatus(node, node, utxoView, map[uint64]*state.VoteResult{})
88 // BestBlockHeight returns the current height of the blockchain.
89 func (c *Chain) BestBlockHeight() uint64 {
91 defer c.cond.L.Unlock()
92 return c.bestNode.Height
95 // BestBlockHash return the hash of the chain tail block
96 func (c *Chain) BestBlockHash() *bc.Hash {
98 defer c.cond.L.Unlock()
99 return &c.bestNode.Hash
102 // BestBlockHeader returns the chain tail block
103 func (c *Chain) BestBlockHeader() *types.BlockHeader {
104 node := c.index.BestNode()
105 return node.BlockHeader()
108 // InMainChain checks wheather a block is in the main chain
109 func (c *Chain) InMainChain(hash bc.Hash) bool {
110 return c.index.InMainchain(hash)
113 // This function must be called with mu lock in above level
114 func (c *Chain) setState(node *state.BlockNode, irreversibleNode *state.BlockNode, view *state.UtxoViewpoint, voteMap map[uint64]*state.VoteResult) error {
115 if err := c.store.SaveChainStatus(node, irreversibleNode, view, voteMap); err != nil {
120 defer c.cond.L.Unlock()
122 c.index.SetMainChain(node)
124 c.bestIrreversibleNode = irreversibleNode
126 log.WithFields(log.Fields{"module": logModule, "height": c.bestNode.Height, "hash": c.bestNode.Hash.String()}).Debug("chain best status has been update")
131 // BlockWaiter returns a channel that waits for the block at the given height.
132 func (c *Chain) BlockWaiter(height uint64) <-chan struct{} {
133 ch := make(chan struct{}, 1)
136 defer c.cond.L.Unlock()
137 for c.bestNode.Height < height {
146 // GetTxPool return chain txpool.
147 func (c *Chain) GetTxPool() *TxPool {
151 // GetBBFT return chain bbft
152 func (c *Chain) GetBBFT() *bbft {