diff options
Diffstat (limited to 'consensus/ethash/consensus.go')
| -rw-r--r-- | consensus/ethash/consensus.go | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/consensus/ethash/consensus.go b/consensus/ethash/consensus.go index 0a2f1520e..0af68c31a 100644 --- a/consensus/ethash/consensus.go +++ b/consensus/ethash/consensus.go @@ -246,24 +246,24 @@ func (ethash *Ethash) verifyHeader(chain consensus.ChainReader, header, parent * return fmt.Errorf("invalid difficulty: have %v, want %v", header.Difficulty, expected) } // Verify that the gas limit is <= 2^63-1 - if header.GasLimit.Cmp(math.MaxBig63) > 0 { - return fmt.Errorf("invalid gasLimit: have %v, max %v", header.GasLimit, math.MaxBig63) + cap := uint64(0x7fffffffffffffff) + if header.GasLimit > cap { + return fmt.Errorf("invalid gasLimit: have %v, max %v", header.GasLimit, cap) } // Verify that the gasUsed is <= gasLimit - if header.GasUsed.Cmp(header.GasLimit) > 0 { - return fmt.Errorf("invalid gasUsed: have %v, gasLimit %v", header.GasUsed, header.GasLimit) + if header.GasUsed > header.GasLimit { + return fmt.Errorf("invalid gasUsed: have %d, gasLimit %d", header.GasUsed, header.GasLimit) } // Verify that the gas limit remains within allowed bounds - diff := new(big.Int).Set(parent.GasLimit) - diff = diff.Sub(diff, header.GasLimit) - diff.Abs(diff) - - limit := new(big.Int).Set(parent.GasLimit) - limit = limit.Div(limit, params.GasLimitBoundDivisor) + diff := int64(parent.GasLimit) - int64(header.GasLimit) + if diff < 0 { + diff *= -1 + } + limit := parent.GasLimit / params.GasLimitBoundDivisor - if diff.Cmp(limit) >= 0 || header.GasLimit.Cmp(params.MinGasLimit) < 0 { - return fmt.Errorf("invalid gas limit: have %v, want %v += %v", header.GasLimit, parent.GasLimit, limit) + if uint64(diff) >= limit || header.GasLimit < params.MinGasLimit { + return fmt.Errorf("invalid gas limit: have %d, want %d += %d", header.GasLimit, parent.GasLimit, limit) } // Verify that the block number is parent's +1 if diff := new(big.Int).Sub(header.Number, parent.Number); diff.Cmp(big.NewInt(1)) != 0 { |