7 log "github.com/sirupsen/logrus"
9 "github.com/vapor/consensus"
10 "github.com/vapor/errors"
11 "github.com/vapor/protocol/bc"
12 "github.com/vapor/protocol/bc/types"
13 "github.com/vapor/protocol/state"
16 const logModule = "leveldb"
19 errBadTimestamp = errors.New("block timestamp is not in the valid range")
20 errBadBits = errors.New("block bits is invalid")
21 errMismatchedBlock = errors.New("mismatched block")
22 errMismatchedMerkleRoot = errors.New("mismatched merkle root")
23 errMisorderedBlockHeight = errors.New("misordered block height")
24 errOverBlockLimit = errors.New("block's gas is over the limit")
25 errWorkProof = errors.New("invalid difficulty proof of work")
26 errVersionRegression = errors.New("version regression")
29 func checkBlockTime(b *bc.Block, parent *types.BlockHeader) error {
30 now := uint64(time.Now().UnixNano() / 1e6)
31 if b.Timestamp < (parent.Timestamp + consensus.ActiveNetParams.BlockTimeInterval) {
32 return errBadTimestamp
34 if b.Timestamp > (now + consensus.ActiveNetParams.MaxTimeOffsetMs) {
35 return errBadTimestamp
41 func checkCoinbaseTx(b *bc.Block, rewards []state.CoinbaseReward) error {
42 if len(b.Transactions) == 0 {
43 return errors.Wrap(ErrWrongCoinbaseTransaction, "block is empty")
46 tx := b.Transactions[0]
47 if len(tx.TxHeader.ResultIds) != len(rewards)+1 {
48 return errors.Wrapf(ErrWrongCoinbaseTransaction, "dismatch number of outputs, got:%d, want:%d", len(tx.TxHeader.ResultIds), len(rewards))
51 rewards = append([]state.CoinbaseReward{state.CoinbaseReward{Amount: uint64(0)}}, rewards...)
52 for i, output := range tx.TxHeader.ResultIds {
53 out, err := tx.IntraChainOutput(*output)
58 if rewards[i].Amount != out.Source.Value.Amount {
59 return errors.Wrapf(ErrWrongCoinbaseTransaction, "dismatch output amount, got:%d, want:%d", out.Source.Value.Amount, rewards[i].Amount)
66 if res := bytes.Compare(rewards[i].ControlProgram, out.ControlProgram.Code); res != 0 {
67 return errors.Wrapf(ErrWrongCoinbaseTransaction, "dismatch output control_program, got:%d, want:%d", out.ControlProgram.Code, rewards[i].ControlProgram)
73 // ValidateBlockHeader check the block's header
74 func ValidateBlockHeader(b *bc.Block, parent *types.BlockHeader) error {
76 return errors.WithDetailf(errVersionRegression, "previous block verson %d, current block version %d", parent.Version, b.Version)
78 if b.Height != parent.Height+1 {
79 return errors.WithDetailf(errMisorderedBlockHeight, "previous block height %d, current block height %d", parent.Height, b.Height)
81 if parent.Hash() != *b.PreviousBlockId {
82 return errors.WithDetailf(errMismatchedBlock, "previous block ID %x, current block wants %x", parent.Hash().Bytes(), b.PreviousBlockId.Bytes())
85 return checkBlockTime(b, parent)
88 // ValidateBlock validates a block and the transactions within.
89 func ValidateBlock(b *bc.Block, parent *types.BlockHeader, rewards []state.CoinbaseReward) error {
90 startTime := time.Now()
91 if err := ValidateBlockHeader(b, parent); err != nil {
95 blockGasSum := uint64(0)
96 b.TransactionStatus = bc.NewTransactionStatus()
97 validateResults := ValidateTxs(b.Transactions, b)
98 for i, validateResult := range validateResults {
99 if !validateResult.gasStatus.GasValid {
100 return errors.Wrapf(validateResult.err, "validate of transaction %d of %d", i, len(b.Transactions))
103 if err := b.TransactionStatus.SetStatus(i, validateResult.err != nil); err != nil {
107 if blockGasSum += uint64(validateResult.gasStatus.GasUsed); blockGasSum > consensus.ActiveNetParams.MaxBlockGas {
108 return errOverBlockLimit
112 if err := checkCoinbaseTx(b, rewards); err != nil {
116 txMerkleRoot, err := types.TxMerkleRoot(b.Transactions)
118 return errors.Wrap(err, "computing transaction id merkle root")
120 if txMerkleRoot != *b.TransactionsRoot {
121 return errors.WithDetailf(errMismatchedMerkleRoot, "transaction id merkle root. compute: %v, given: %v", txMerkleRoot, *b.TransactionsRoot)
124 txStatusHash, err := types.TxStatusMerkleRoot(b.TransactionStatus.VerifyStatus)
126 return errors.Wrap(err, "computing transaction status merkle root")
128 if txStatusHash != *b.TransactionStatusHash {
129 return errors.WithDetailf(errMismatchedMerkleRoot, "transaction status merkle root. compute: %v, given: %v", txStatusHash, *b.TransactionStatusHash)
132 log.WithFields(log.Fields{
135 "hash": b.ID.String(),
136 "duration": time.Since(startTime),
137 }).Debug("finish validate block")