From 74f726b4a203f60e85106ff41a6eed1959034ec8 Mon Sep 17 00:00:00 2001
From: Domino Valdano <2644901+reductionista@users.noreply.github.com>
Date: Wed, 19 Feb 2025 22:27:23 -0800
Subject: [PATCH] Avoid modifying input buffer while decoding

---
 pkg/codec/encodings/binary/builder.go | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/pkg/codec/encodings/binary/builder.go b/pkg/codec/encodings/binary/builder.go
index 3996fb69e..7b2835171 100644
--- a/pkg/codec/encodings/binary/builder.go
+++ b/pkg/codec/encodings/binary/builder.go
@@ -115,12 +115,16 @@ func (littleBigInt) serializeUnsigned(size int, i *big.Int) ([]byte, error) {
 }
 
 func (littleBigInt) deserializeSigned(size int, b []byte) *big.Int {
-	slices.Reverse(b)
-	bi, _ := bigbigendian.DeserializeSigned(size, b)
+	r := make([]byte, len(b))
+	copy(r, b)
+	slices.Reverse(r)
+	bi, _ := bigbigendian.DeserializeSigned(size, r)
 	return bi
 }
 
 func (littleBigInt) deserializeUnsigned(_ int, b []byte) *big.Int {
-	slices.Reverse(b)
-	return new(big.Int).SetBytes(b)
+	r := make([]byte, len(b))
+	copy(r, b)
+	slices.Reverse(r)
+	return new(big.Int).SetBytes(r)
 }