8 log "github.com/sirupsen/logrus"
10 "github.com/vapor/account"
11 "github.com/vapor/config"
12 "github.com/vapor/event"
13 "github.com/vapor/proposal"
14 "github.com/vapor/protocol"
18 logModule = "blockproposer"
21 // BlockProposer propose several block in specified time range
22 type BlockProposer struct {
25 accountManager *account.Manager
26 txPool *protocol.TxPool
29 eventDispatcher *event.Dispatcher
32 // generateBlocks is a worker that is controlled by the proposeWorkerController.
33 // It is self contained in that it creates block templates and attempts to solve
34 // them while detecting when it is performing stale work and reacting
35 // accordingly by generating a new block template. When a block is verified, it
38 // It must be run as a goroutine.
39 func (b *BlockProposer) generateBlocks() {
40 xpub := config.CommonConfig.PrivateKey().XPub()
41 xpubStr := hex.EncodeToString(xpub[:])
42 ticker := time.NewTicker(time.Millisecond * 500)
52 bestBlockHeader := b.chain.BestBlockHeader()
53 bestBlockHash := bestBlockHeader.Hash()
54 nextBlockTime := uint64(time.Now().UnixNano() / 1e6)
55 if minNextBlockTime := bestBlockHeader.Timestamp + uint64(500); nextBlockTime < minNextBlockTime {
56 nextBlockTime = minNextBlockTime
59 if isBlocker, err := b.chain.GetBBFT().IsBlocker(&bestBlockHash, xpubStr, nextBlockTime); !isBlocker {
60 log.WithFields(log.Fields{"module": logModule, "error": err, "pubKey": xpubStr}).Debug("fail on check is next blocker")
64 block, err := proposal.NewBlockTemplate(b.chain, b.txPool, b.accountManager, nextBlockTime)
66 log.WithFields(log.Fields{"module": logModule, "error": err}).Error("failed on create NewBlockTemplate")
70 isOrphan, err := b.chain.ProcessBlock(block)
72 log.WithFields(log.Fields{"module": logModule, "height": block.BlockHeader.Height, "error": err}).Error("proposer fail on ProcessBlock")
76 log.WithFields(log.Fields{"module": logModule, "height": block.BlockHeader.Height, "isOrphan": isOrphan, "tx": len(block.Transactions)}).Info("proposer processed block")
77 // Broadcast the block and announce chain insertion event
78 if err = b.eventDispatcher.Post(event.NewProposedBlockEvent{Block: *block}); err != nil {
79 log.WithFields(log.Fields{"module": logModule, "height": block.BlockHeader.Height, "error": err}).Error("proposer fail on post block")
84 // Start begins the block propose process as well as the speed monitor used to
85 // track hashing metrics. Calling this function when the block proposer has
86 // already been started will have no effect.
88 // This function is safe for concurrent access.
89 func (b *BlockProposer) Start() {
93 // Nothing to do if the miner is already running
98 b.quit = make(chan struct{})
102 log.Infof("block proposer started")
105 // Stop gracefully stops the proposal process by signalling all workers, and the
106 // speed monitor to quit. Calling this function when the block proposer has not
107 // already been started will have no effect.
109 // This function is safe for concurrent access.
110 func (b *BlockProposer) Stop() {
114 // Nothing to do if the miner is not currently running
121 log.Info("block proposer stopped")
124 // IsProposing returns whether the block proposer has been started.
126 // This function is safe for concurrent access.
127 func (b *BlockProposer) IsProposing() bool {
134 // NewBlockProposer returns a new instance of a block proposer for the provided configuration.
135 // Use Start to begin the proposal process. See the documentation for BlockProposer
136 // type for more details.
137 func NewBlockProposer(c *protocol.Chain, accountManager *account.Manager, txPool *protocol.TxPool, dispatcher *event.Dispatcher) *BlockProposer {
138 return &BlockProposer{
140 accountManager: accountManager,
142 eventDispatcher: dispatcher,