From ce3600d7def4f2b845cb5c6612a6280a55eb5f42 Mon Sep 17 00:00:00 2001 From: Daniel Liu Date: Tue, 14 Jan 2025 10:56:14 +0800 Subject: [PATCH] accounts/abi: prefer new(big.Int) over big.NewInt(0) (#25087) --- accounts/abi/unpack.go | 10 ++++------ accounts/abi/unpack_test.go | 2 +- 2 files changed, 5 insertions(+), 7 deletions(-) diff --git a/accounts/abi/unpack.go b/accounts/abi/unpack.go index 45196c7a1a68b..256c2c650b45f 100644 --- a/accounts/abi/unpack.go +++ b/accounts/abi/unpack.go @@ -256,7 +256,7 @@ func toGoType(index int, t Type, output []byte) (interface{}, error) { // lengthPrefixPointsTo interprets a 32 byte slice as an offset and then determines which indices to look to decode the type. func lengthPrefixPointsTo(index int, output []byte) (start int, length int, err error) { - bigOffsetEnd := big.NewInt(0).SetBytes(output[index : index+32]) + bigOffsetEnd := new(big.Int).SetBytes(output[index : index+32]) bigOffsetEnd.Add(bigOffsetEnd, common.Big32) outputLength := big.NewInt(int64(len(output))) @@ -269,11 +269,9 @@ func lengthPrefixPointsTo(index int, output []byte) (start int, length int, err } offsetEnd := int(bigOffsetEnd.Uint64()) - lengthBig := big.NewInt(0).SetBytes(output[offsetEnd-32 : offsetEnd]) + lengthBig := new(big.Int).SetBytes(output[offsetEnd-32 : offsetEnd]) - totalSize := big.NewInt(0) - totalSize.Add(totalSize, bigOffsetEnd) - totalSize.Add(totalSize, lengthBig) + totalSize := new(big.Int).Add(bigOffsetEnd, lengthBig) if totalSize.BitLen() > 63 { return 0, 0, fmt.Errorf("abi: length larger than int64: %v", totalSize) } @@ -288,7 +286,7 @@ func lengthPrefixPointsTo(index int, output []byte) (start int, length int, err // tuplePointsTo resolves the location reference for dynamic tuple. func tuplePointsTo(index int, output []byte) (start int, err error) { - offset := big.NewInt(0).SetBytes(output[index : index+32]) + offset := new(big.Int).SetBytes(output[index : index+32]) outputLen := big.NewInt(int64(len(output))) if offset.Cmp(outputLen) > 0 { diff --git a/accounts/abi/unpack_test.go b/accounts/abi/unpack_test.go index 751c97cd6131f..2dc5e3be99dfa 100644 --- a/accounts/abi/unpack_test.go +++ b/accounts/abi/unpack_test.go @@ -424,7 +424,7 @@ func TestMultiReturnWithStringArray(t *testing.T) { } buff := new(bytes.Buffer) buff.Write(common.Hex2Bytes("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")) - temp, _ := big.NewInt(0).SetString("30000000000000000000", 10) + temp, _ := new(big.Int).SetString("30000000000000000000", 10) ret1, ret1Exp := new([3]*big.Int), [3]*big.Int{big.NewInt(1545304298), big.NewInt(6), temp} ret2, ret2Exp := new(common.Address), common.HexToAddress("ab1257528b3782fb40d7ed5f72e624b744dffb2f") ret3, ret3Exp := new([2]string), [2]string{"Ethereum", "Hello, Ethereum!"}