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crypto: add comment to FromECDSAPub (#31241)

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closes https://github.com/ethereum/go-ethereum/issues/26240
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Marius van der Wijden 2025-02-24 12:23:25 +01:00 committed by GitHub
parent a0e6381c48
commit fbe0005070
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crypto/crypto.go
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@ -184,6 +184,9 @@ func UnmarshalPubkey(pub []byte) (*ecdsa.PublicKey, error) {
return &ecdsa.PublicKey{Curve: S256(), X: x, Y: y}, nil return &ecdsa.PublicKey{Curve: S256(), X: x, Y: y}, nil
} }
// FromECDSAPub converts a secp256k1 public key to bytes.
// Note: it does not use the curve from pub, instead it always
// encodes using secp256k1.
func FromECDSAPub(pub *ecdsa.PublicKey) []byte { func FromECDSAPub(pub *ecdsa.PublicKey) []byte {
if pub == nil || pub.X == nil || pub.Y == nil { if pub == nil || pub.X == nil || pub.Y == nil {
return nil return nil