8 log "github.com/sirupsen/logrus"
10 "github.com/vapor/account"
11 "github.com/vapor/blockchain/txbuilder"
12 "github.com/vapor/consensus"
13 "github.com/vapor/errors"
14 "github.com/vapor/protocol"
15 "github.com/vapor/protocol/bc"
16 "github.com/vapor/protocol/bc/types"
17 "github.com/vapor/protocol/state"
18 "github.com/vapor/protocol/validation"
19 "github.com/vapor/protocol/vm/vmutil"
22 const logModule = "mining"
24 // createCoinbaseTx returns a coinbase transaction paying an appropriate subsidy
25 // based on the passed block height to the provided address. When the address
26 // is nil, the coinbase transaction will instead be redeemable by anyone.
27 func createCoinbaseTx(accountManager *account.Manager, blockHeight uint64) (tx *types.Tx, err error) {
28 arbitrary := append([]byte{0x00}, []byte(strconv.FormatUint(blockHeight, 10))...)
30 if accountManager == nil {
31 script, err = vmutil.DefaultCoinbaseProgram()
33 script, err = accountManager.GetCoinbaseControlProgram()
34 arbitrary = append(arbitrary, accountManager.GetCoinbaseArbitrary()...)
40 if len(arbitrary) > consensus.ActiveNetParams.CoinbaseArbitrarySizeLimit {
41 return nil, validation.ErrCoinbaseArbitraryOversize
44 builder := txbuilder.NewBuilder(time.Now())
45 if err = builder.AddInput(types.NewCoinbaseInput(arbitrary), &txbuilder.SigningInstruction{}); err != nil {
48 if err = builder.AddOutput(types.NewIntraChainOutput(*consensus.BTMAssetID, 0, script)); err != nil {
52 _, txData, err := builder.Build()
59 Tx: types.MapTx(txData),
64 // restructCoinbaseTx build coinbase transaction with aggregate outputs when it achieved the specified block height
65 func restructCoinbaseTx(tx *types.Tx, rewards []state.CoinbaseReward) error {
66 for _, r := range rewards {
67 tx.Outputs = append(tx.Outputs, types.NewIntraChainOutput(*consensus.BTMAssetID, r.Amount, r.ControlProgram))
70 byteData, err := tx.TxData.MarshalText()
75 tx.TxData.SerializedSize = uint64(len(byteData))
76 tx.Tx = types.MapTx(&tx.TxData)
80 // NewBlockTemplate returns a new block template that is ready to be solved
81 func NewBlockTemplate(c *protocol.Chain, txPool *protocol.TxPool, accountManager *account.Manager, timestamp uint64) (b *types.Block, err error) {
82 view := state.NewUtxoViewpoint()
83 txStatus := bc.NewTransactionStatus()
84 if err := txStatus.SetStatus(0, false); err != nil {
87 txEntries := []*bc.Tx{nil}
90 // get preblock info for generate next block
91 preBlockHeader := c.BestBlockHeader()
92 preBlockHash := preBlockHeader.Hash()
93 nextBlockHeight := preBlockHeader.Height + 1
96 BlockHeader: types.BlockHeader{
98 Height: nextBlockHeight,
99 PreviousBlockHash: preBlockHash,
100 Timestamp: timestamp,
101 BlockCommitment: types.BlockCommitment{},
102 BlockWitness: types.BlockWitness{Witness: make([][]byte, consensus.ActiveNetParams.NumOfConsensusNode)},
105 bcBlock := &bc.Block{BlockHeader: &bc.BlockHeader{Height: nextBlockHeight}}
106 b.Transactions = []*types.Tx{nil}
108 txs := txPool.GetTransactions()
109 sort.Sort(byTime(txs))
111 entriesTxs := []*bc.Tx{}
112 for _, txDesc := range txs {
113 entriesTxs = append(entriesTxs, txDesc.Tx.Tx)
116 validateResults := validation.ValidateTxs(entriesTxs, bcBlock)
117 for i, validateResult := range validateResults {
122 gasStatus := validateResult.GetGasState()
123 if validateResult.GetError() != nil {
124 if !gasStatus.GasValid {
125 blkGenSkipTxForErr(txPool, &tx.ID, err)
131 if err := c.GetTransactionsUtxo(view, []*bc.Tx{tx}); err != nil {
132 blkGenSkipTxForErr(txPool, &tx.ID, err)
136 if gasUsed+uint64(gasStatus.GasUsed) > consensus.ActiveNetParams.MaxBlockGas {
140 if err := view.ApplyTransaction(bcBlock, tx, gasOnlyTx); err != nil {
141 blkGenSkipTxForErr(txPool, &tx.ID, err)
145 if err := txStatus.SetStatus(len(b.Transactions), gasOnlyTx); err != nil {
149 b.Transactions = append(b.Transactions, txDesc.Tx)
150 txEntries = append(txEntries, tx)
151 gasUsed += uint64(gasStatus.GasUsed)
152 if gasUsed == consensus.ActiveNetParams.MaxBlockGas {
158 // create coinbase transaction
159 b.Transactions[0], err = createCoinbaseTx(accountManager, nextBlockHeight)
161 return nil, errors.Wrap(err, "fail on createCoinbaseTx")
164 consensusResult, err := c.GetConsensusResultByHash(&preBlockHash)
169 if err := consensusResult.AttachCoinbaseReward(b); err != nil {
173 rewards, err := consensusResult.GetCoinbaseRewards(nextBlockHeight)
178 // restruct coinbase transaction
179 if err = restructCoinbaseTx(b.Transactions[0], rewards); err != nil {
180 return nil, errors.Wrap(err, "fail on createCoinbaseTx")
183 txEntries[0] = b.Transactions[0].Tx
184 b.BlockHeader.BlockCommitment.TransactionsMerkleRoot, err = types.TxMerkleRoot(txEntries)
189 b.BlockHeader.BlockCommitment.TransactionStatusHash, err = types.TxStatusMerkleRoot(txStatus.VerifyStatus)
191 _, err = c.SignBlock(b)
195 func blkGenSkipTxForErr(txPool *protocol.TxPool, txHash *bc.Hash, err error) {
196 log.WithFields(log.Fields{"module": logModule, "error": err}).Error("mining block generation: skip tx due to")
197 txPool.RemoveTransaction(txHash)