create local copy of signature when verify

kwilteam · Aug 15, 2023 · 428e536 · 428e536
1 parent 16f4193
commit 428e536
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/pkg/crypto/secp256k1.go b/pkg/crypto/secp256k1.go
@@ -69,8 +69,8 @@ func (s *Secp256k1PublicKey) Type() KeyType {
 func (s *Secp256k1PublicKey) Verify(sig *Signature, msg []byte) error {
 	hash := ethAccount.TextHash(msg)
 	// Remove recovery ID
-	sig.Signature = sig.Signature[:len(sig.Signature)-1]
-	if !ethCrypto.VerifySignature(s.Bytes(), hash, sig.Signature) {
+	signature := sig.Signature[:len(sig.Signature)-1]
+	if !ethCrypto.VerifySignature(s.Bytes(), hash, signature) {
 		return fmt.Errorf("invalid signature")
 	}