7 log "github.com/sirupsen/logrus"
9 "github.com/vapor/account"
10 "github.com/vapor/blockchain/txbuilder"
11 "github.com/vapor/consensus"
12 "github.com/vapor/errors"
13 "github.com/vapor/protocol"
14 "github.com/vapor/protocol/bc"
15 "github.com/vapor/protocol/bc/types"
16 "github.com/vapor/protocol/state"
17 "github.com/vapor/protocol/validation"
18 "github.com/vapor/protocol/vm/vmutil"
21 const logModule = "mining"
23 // createCoinbaseTx returns a coinbase transaction paying an appropriate subsidy
24 // based on the passed block height to the provided address. When the address
25 // is nil, the coinbase transaction will instead be redeemable by anyone.
26 func createCoinbaseTx(accountManager *account.Manager, blockHeight uint64, rewards []state.CoinbaseReward) (tx *types.Tx, err error) {
27 arbitrary := append([]byte{0x00}, []byte(strconv.FormatUint(blockHeight, 10))...)
29 if accountManager == nil {
30 script, err = vmutil.DefaultCoinbaseProgram()
32 script, err = accountManager.GetCoinbaseControlProgram()
33 arbitrary = append(arbitrary, accountManager.GetCoinbaseArbitrary()...)
39 if len(arbitrary) > consensus.ActiveNetParams.CoinbaseArbitrarySizeLimit {
40 return nil, validation.ErrCoinbaseArbitraryOversize
43 builder := txbuilder.NewBuilder(time.Now())
44 if err = builder.AddInput(types.NewCoinbaseInput(arbitrary), &txbuilder.SigningInstruction{}); err != nil {
47 if err = builder.AddOutput(types.NewIntraChainOutput(*consensus.BTMAssetID, 0, script)); err != nil {
51 for _, r := range rewards {
52 if err = builder.AddOutput(types.NewIntraChainOutput(*consensus.BTMAssetID, r.Amount, r.ControlProgram)); err != nil {
57 _, txData, err := builder.Build()
62 byteData, err := txData.MarshalText()
67 txData.SerializedSize = uint64(len(byteData))
70 Tx: types.MapTx(txData),
75 // NewBlockTemplate returns a new block template that is ready to be solved
76 func NewBlockTemplate(c *protocol.Chain, txPool *protocol.TxPool, accountManager *account.Manager, txs []*types.Tx, timestamp uint64) (b *types.Block, err error) {
77 view := state.NewUtxoViewpoint()
78 txStatus := bc.NewTransactionStatus()
79 if err := txStatus.SetStatus(0, false); err != nil {
82 txEntries := []*bc.Tx{nil}
85 // get preblock info for generate next block
86 preBlockHeader := c.BestBlockHeader()
87 preBlockHash := preBlockHeader.Hash()
88 nextBlockHeight := preBlockHeader.Height + 1
91 BlockHeader: types.BlockHeader{
93 Height: nextBlockHeight,
94 PreviousBlockHash: preBlockHash,
96 BlockCommitment: types.BlockCommitment{},
97 BlockWitness: types.BlockWitness{Witness: make([][]byte, consensus.ActiveNetParams.NumOfConsensusNode)},
100 bcBlock := &bc.Block{BlockHeader: &bc.BlockHeader{Height: nextBlockHeight}}
101 b.Transactions = []*types.Tx{nil}
103 entriesTxs := []*bc.Tx{}
104 for _, tx := range txs {
105 entriesTxs = append(entriesTxs, tx.Tx)
108 validateResults := validation.ValidateTxs(entriesTxs, bcBlock)
109 for i, validateResult := range validateResults {
113 gasStatus := validateResult.GetGasState()
114 if validateResult.GetError() != nil {
115 if !gasStatus.GasValid {
116 blkGenSkipTxForErr(txPool, &tx.ID, err)
122 if err := c.GetTransactionsUtxo(view, []*bc.Tx{tx}); err != nil {
123 blkGenSkipTxForErr(txPool, &tx.ID, err)
127 if gasUsed+uint64(gasStatus.GasUsed) > consensus.ActiveNetParams.MaxBlockGas {
131 if err := view.ApplyTransaction(bcBlock, tx, gasOnlyTx); err != nil {
132 blkGenSkipTxForErr(txPool, &tx.ID, err)
136 if err := txStatus.SetStatus(len(b.Transactions), gasOnlyTx); err != nil {
140 b.Transactions = append(b.Transactions, txs[i])
141 txEntries = append(txEntries, tx)
142 gasUsed += uint64(gasStatus.GasUsed)
143 if gasUsed == consensus.ActiveNetParams.MaxBlockGas {
149 consensusResult, err := c.GetConsensusResultByHash(&preBlockHash)
154 rewards, err := consensusResult.GetCoinbaseRewards(preBlockHeader.Height)
159 // create coinbase transaction
160 b.Transactions[0], err = createCoinbaseTx(accountManager, nextBlockHeight, rewards)
162 return nil, errors.Wrap(err, "fail on createCoinbaseTx")
165 txEntries[0] = b.Transactions[0].Tx
166 b.BlockHeader.BlockCommitment.TransactionsMerkleRoot, err = types.TxMerkleRoot(txEntries)
171 b.BlockHeader.BlockCommitment.TransactionStatusHash, err = types.TxStatusMerkleRoot(txStatus.VerifyStatus)
173 _, err = c.SignBlock(b)
177 func blkGenSkipTxForErr(txPool *protocol.TxPool, txHash *bc.Hash, err error) {
178 log.WithFields(log.Fields{"module": logModule, "error": err}).Error("mining block generation: skip tx due to")
179 txPool.RemoveTransaction(txHash)