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 // createCoinbaseTx returns a coinbase transaction paying an appropriate subsidy
23 // based on the passed block height to the provided address. When the address
24 // is nil, the coinbase transaction will instead be redeemable by anyone.
25 func createCoinbaseTx(accountManager *account.Manager, amount uint64, blockHeight uint64) (tx *types.Tx, err error) {
26 //amount += consensus.BlockSubsidy(blockHeight)
27 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.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.NewTxOutput(*consensus.BTMAssetID, amount, script)); err != nil {
51 _, txData, err := builder.Build()
56 byteData, err := txData.MarshalText()
60 txData.SerializedSize = uint64(len(byteData))
64 Tx: types.MapTx(txData),
69 // NewBlockTemplate returns a new block template that is ready to be solved
70 func NewBlockTemplate(c *protocol.Chain, txPool *protocol.TxPool, accountManager *account.Manager) (b *types.Block, err error) {
71 view := state.NewUtxoViewpoint()
72 txStatus := bc.NewTransactionStatus()
73 if err := txStatus.SetStatus(0, false); err != nil {
76 txEntries := []*bc.Tx{nil}
80 // get preblock info for generate next block
81 preBlockHeader := c.BestBlockHeader()
82 preBlockHash := preBlockHeader.Hash()
83 nextBlockHeight := preBlockHeader.Height + 1
86 BlockHeader: types.BlockHeader{
88 Height: nextBlockHeight,
89 PreviousBlockHash: preBlockHash,
90 Timestamp: uint64(time.Now().Unix()),
91 BlockCommitment: types.BlockCommitment{},
94 bcBlock := &bc.Block{BlockHeader: &bc.BlockHeader{Height: nextBlockHeight}}
95 b.Transactions = []*types.Tx{nil}
97 txs := txPool.GetTransactions()
98 sort.Sort(byTime(txs))
99 for _, txDesc := range txs {
103 if err := c.GetTransactionsUtxo(view, []*bc.Tx{tx}); err != nil {
104 blkGenSkipTxForErr(txPool, &tx.ID, err)
108 gasStatus, err := validation.ValidateTx(tx, bcBlock)
110 if !gasStatus.GasValid {
111 blkGenSkipTxForErr(txPool, &tx.ID, err)
117 if gasUsed+uint64(gasStatus.GasUsed) > consensus.MaxBlockGas {
121 if err := view.ApplyTransaction(bcBlock, tx, gasOnlyTx); err != nil {
122 blkGenSkipTxForErr(txPool, &tx.ID, err)
126 if err := txStatus.SetStatus(len(b.Transactions), gasOnlyTx); err != nil {
130 b.Transactions = append(b.Transactions, txDesc.Tx)
131 txEntries = append(txEntries, tx)
132 gasUsed += uint64(gasStatus.GasUsed)
135 if gasUsed == consensus.MaxBlockGas {
142 // creater coinbase transaction
143 b.Transactions[0], err = createCoinbaseTx(accountManager, txFee, nextBlockHeight)
145 return nil, errors.Wrap(err, "fail on createCoinbaseTx")
147 txEntries[0] = b.Transactions[0].Tx
149 b.BlockHeader.BlockCommitment.TransactionsMerkleRoot, err = types.TxMerkleRoot(txEntries)
154 b.BlockHeader.BlockCommitment.TransactionStatusHash, err = types.TxStatusMerkleRoot(txStatus.VerifyStatus)
158 func blkGenSkipTxForErr(txPool *protocol.TxPool, txHash *bc.Hash, err error) {
159 log.WithField("error", err).Error("mining block generation: skip tx due to")
160 txPool.RemoveTransaction(txHash)