+++ /dev/null
-package mining
-
-import (
- "encoding/binary"
- "encoding/json"
- "sort"
- "strconv"
- "time"
-
- "github.com/vapor/protocol/vm"
-
- "github.com/vapor/common"
-
- log "github.com/sirupsen/logrus"
-
- "github.com/vapor/account"
- "github.com/vapor/blockchain/txbuilder"
- "github.com/vapor/config"
- "github.com/vapor/consensus"
- engine "github.com/vapor/consensus/consensus"
- dpos "github.com/vapor/consensus/consensus/dpos"
- "github.com/vapor/crypto/ed25519/chainkd"
- "github.com/vapor/errors"
- "github.com/vapor/protocol"
- "github.com/vapor/protocol/bc"
- "github.com/vapor/protocol/bc/types"
- "github.com/vapor/protocol/state"
- "github.com/vapor/protocol/validation"
- "github.com/vapor/protocol/vm/vmutil"
-)
-
-// createCoinbaseTx returns a coinbase transaction paying an appropriate subsidy
-// based on the passed block height to the provided address. When the address
-// is nil, the coinbase transaction will instead be redeemable by anyone.
-func createCoinbaseTx(accountManager *account.Manager, amount uint64, blockHeight uint64, delegateInfo interface{}, timestamp uint64) (tx *types.Tx, err error) {
- //amount += consensus.BlockSubsidy(blockHeight)
- arbitrary := append([]byte{0x00}, []byte(strconv.FormatUint(blockHeight, 10))...)
-
- var script []byte
- address, _ := common.DecodeAddress(config.CommonConfig.Consensus.Coinbase, &consensus.ActiveNetParams)
- redeemContract := address.ScriptAddress()
- script, _ = vmutil.P2WPKHProgram(redeemContract)
-
- if err != nil {
- return nil, err
- }
-
- if len(arbitrary) > consensus.CoinbaseArbitrarySizeLimit {
- return nil, validation.ErrCoinbaseArbitraryOversize
- }
-
- builder := txbuilder.NewBuilder(time.Now())
- if err = builder.AddInput(types.NewCoinbaseInput(arbitrary), &txbuilder.SigningInstruction{}); err != nil {
- return nil, err
- }
-
- if err = builder.AddOutput(types.NewTxOutput(*consensus.BTMAssetID, amount, script)); err != nil {
- return nil, err
- }
- _, txData, err := builder.Build()
- if err != nil {
- return nil, err
- }
-
- delegates := dpos.DelegateInfoList{}
- if delegateInfo != nil {
- tmp := delegateInfo.(*dpos.DelegateInfo)
- delegates.Delegate = *tmp
- }
-
- var xPrv chainkd.XPrv
- if config.CommonConfig.Consensus.XPrv == "" {
- return nil, errors.New("Signer is empty")
- }
- xPrv.UnmarshalText([]byte(config.CommonConfig.Consensus.XPrv))
-
- buf := [8]byte{}
- binary.LittleEndian.PutUint64(buf[:], timestamp)
- delegates.SigTime = xPrv.Sign(buf[:])
- delegates.Xpub = xPrv.XPub()
-
- data, err := json.Marshal(&delegates)
- if err != nil {
- return nil, err
- }
-
- msg := dpos.DposMsg{
- Type: vm.OP_DELEGATE,
- Data: data,
- }
-
- data, err = json.Marshal(&msg)
- if err != nil {
- return nil, err
- }
- txData.ReferenceData = data
-
- byteData, err := txData.MarshalText()
- if err != nil {
- return nil, err
- }
- txData.SerializedSize = uint64(len(byteData))
-
- tx = &types.Tx{
- TxData: *txData,
- Tx: types.MapTx(txData),
- }
- return tx, nil
-}
-
-// NewBlockTemplate returns a new block template that is ready to be solved
-func NewBlockTemplate(c *protocol.Chain, txPool *protocol.TxPool, accountManager *account.Manager, engine engine.Engine, delegateInfo interface{}, blockTime uint64) (b *types.Block, err error) {
- view := state.NewUtxoViewpoint()
- txStatus := bc.NewTransactionStatus()
- if err := txStatus.SetStatus(0, false); err != nil {
- return nil, err
- }
- txEntries := []*bc.Tx{nil}
- gasUsed := uint64(0)
- txFee := uint64(0)
-
- // get preblock info for generate next block
- preBlockHeader := c.BestBlockHeader()
- preBlockHash := preBlockHeader.Hash()
- nextBlockHeight := preBlockHeader.Height + 1
-
- header := types.BlockHeader{
- Version: 1,
- Height: nextBlockHeight,
- PreviousBlockHash: preBlockHash,
- Timestamp: blockTime,
- BlockCommitment: types.BlockCommitment{},
- }
-
- b = &types.Block{}
- bcBlock := &bc.Block{BlockHeader: &bc.BlockHeader{Height: nextBlockHeight}}
- b.Transactions = []*types.Tx{nil}
-
- txs := txPool.GetTransactions()
- sort.Sort(byTime(txs))
- for _, txDesc := range txs {
- tx := txDesc.Tx.Tx
- gasOnlyTx := false
-
- if err := c.GetTransactionsUtxo(view, []*bc.Tx{tx}); err != nil {
- blkGenSkipTxForErr(txPool, &tx.ID, err)
- continue
- }
- gasStatus, err := validation.ValidateTx(tx, bcBlock)
- if err != nil {
- if !gasStatus.GasValid {
- blkGenSkipTxForErr(txPool, &tx.ID, err)
- continue
- }
- gasOnlyTx = true
- }
-
- if gasUsed+uint64(gasStatus.GasUsed) > consensus.MaxBlockGas {
- break
- }
-
- if err := view.ApplyTransaction(bcBlock, tx, gasOnlyTx); err != nil {
- blkGenSkipTxForErr(txPool, &tx.ID, err)
- continue
- }
-
- if err := txStatus.SetStatus(len(b.Transactions), gasOnlyTx); err != nil {
- return nil, err
- }
-
- b.Transactions = append(b.Transactions, txDesc.Tx)
- txEntries = append(txEntries, tx)
- gasUsed += uint64(gasStatus.GasUsed)
- txFee += txDesc.Fee
- if gasUsed == consensus.MaxBlockGas {
- break
- }
- }
-
- b.BlockHeader = header
- // creater coinbase transaction
- b.Transactions[0], err = createCoinbaseTx(accountManager, txFee, nextBlockHeight, delegateInfo, b.Timestamp)
- if err != nil {
- return nil, errors.Wrap(err, "fail on createCoinbaseTx")
- }
- txEntries[0] = b.Transactions[0].Tx
-
- b.BlockHeader.BlockCommitment.TransactionsMerkleRoot, err = types.TxMerkleRoot(txEntries)
- if err != nil {
- return nil, err
- }
-
- b.BlockHeader.BlockCommitment.TransactionStatusHash, err = types.TxStatusMerkleRoot(txStatus.VerifyStatus)
- return b, err
-}
-
-func blkGenSkipTxForErr(txPool *protocol.TxPool, txHash *bc.Hash, err error) {
- log.WithField("error", err).Error("mining block generation: skip tx due to")
- txPool.RemoveTransaction(txHash)
-}
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