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core/filtermaps: simplify sha256 hashing with Sum256

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Replace manual hasher.New/Write/Sum sequences with direct sha256.Sum256
calls, reducing heap allocations and improving code readability.
This commit is contained in:
Nyxen 2026-04-04 16:49:55 -04:00
parent d8cb8a962b
commit e2eebf4e0a
1 changed files with 7 additions and 18 deletions
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25
core/filtermaps/math.go
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@ -93,20 +93,12 @@ func (p *Params) deriveFields() {
// addressValue returns the log value hash of a log emitting address.
func addressValue(address common.Address) common.Hash {
var result common.Hash
hasher := sha256.New()
hasher.Write(address[:])
hasher.Sum(result[:0])
return result
return common.Hash(sha256.Sum256(address[:]))
}
// topicValue returns the log value hash of a log topic.
func topicValue(topic common.Hash) common.Hash {
var result common.Hash
hasher := sha256.New()
hasher.Write(topic[:])
hasher.Sum(result[:0])
return result
return common.Hash(sha256.Sum256(topic[:]))
}
// sanitize derives any missing fields and validates the parameter values.
@ -154,14 +146,11 @@ func (p *Params) lastEpochMap(epoch uint32) uint32 {
// layers while avoiding putting too many heavy rows next to each other on
// higher order layers.
func (p *Params) rowIndex(mapIndex, layerIndex uint32, logValue common.Hash) uint32 {
hasher := sha256.New()
hasher.Write(logValue[:])
var indexEnc [8]byte
binary.LittleEndian.PutUint32(indexEnc[0:4], p.maskedMapIndex(mapIndex, layerIndex))
binary.LittleEndian.PutUint32(indexEnc[4:8], layerIndex)
hasher.Write(indexEnc[:])
var hash common.Hash
hasher.Sum(hash[:0])
var buf [common.HashLength + 8]byte
copy(buf[:common.HashLength], logValue[:])
binary.LittleEndian.PutUint32(buf[common.HashLength:common.HashLength+4], p.maskedMapIndex(mapIndex, layerIndex))
binary.LittleEndian.PutUint32(buf[common.HashLength+4:common.HashLength+8], layerIndex)
hash := sha256.Sum256(buf[:])
return binary.LittleEndian.Uint32(hash[:4]) % p.mapHeight
}