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pre-alloc uin256 for chainID derive (#141)

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Alex Sharov 2021-11-01 09:42:39 +07:00 committed by GitHub
parent b50cb37fa8
commit ce3a3dcfeb
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1 changed files with 4 additions and 3 deletions
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7
txpool/types.go
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@ -44,7 +44,8 @@ type TxParseContext struct {
keccak2 hash.Hash keccak2 hash.Hash
chainId, r, s, v uint256.Int // Signature values chainId, r, s, v uint256.Int // Signature values
chainIDMul uint256.Int chainIDMul uint256.Int
buf [65]byte // buffer needs to be enough for hashes (32 bytes) and for public key (65 bytes) deriveChainID uint256.Int // pre-allocated variable to calculate Sub(&ctx.v, &ctx.chainIDMul)
buf [65]byte // buffer needs to be enough for hashes (32 bytes) and for public key (65 bytes)
sighash [32]byte sighash [32]byte
sig [65]byte sig [65]byte
withSender bool withSender bool
@ -322,8 +323,8 @@ func (ctx *TxParseContext) ParseTransaction(payload []byte, pos int, slot *TxSlo
sigHashLen += 2 // For two extra zeros sigHashLen += 2 // For two extra zeros
//vByte = byte(1 - (ctx.v.Uint64() & 1)) //vByte = byte(1 - (ctx.v.Uint64() & 1))
v := uint256.NewInt(0).Sub(&ctx.v, &ctx.chainIDMul) ctx.deriveChainID.Sub(&ctx.v, &ctx.chainIDMul)
vByte = v.Sub(v, u256.N8).Bytes()[0] - 27 vByte = ctx.deriveChainID.Sub(&ctx.deriveChainID, u256.N8).Bytes()[0] - 27
} }
} else { } else {
var v uint64 var v uint64