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89c6c5bb85
When converting a negative number e.g., -2, the resulting ABI encoding should look as follows: fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe. However, since the check of the type is for an uint instead of an int, it results in the following ABI encoding: 0101010101010101010101010101010101010101010101010101010101010102. The Ethereum ABI (https://github.com/ethereum/wiki/wiki/Ethereum-Contract-ABI) says, that signed integers are stored in two's complement which should be of the form ffffff.... and not 01010101..... for e.g. -1. Thus, I removed the type check in numbers.go as well as the function S256 as I don't think they are correct. Or maybe I'm missing something?
65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package abi
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import (
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"bytes"
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"math/big"
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"reflect"
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"testing"
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)
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func TestNumberTypes(t *testing.T) {
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ubytes := make([]byte, 32)
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ubytes[31] = 1
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unsigned := U256(big.NewInt(1))
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if !bytes.Equal(unsigned, ubytes) {
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t.Errorf("expected %x got %x", ubytes, unsigned)
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}
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}
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func TestPackNumber(t *testing.T) {
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ubytes := make([]byte, 32)
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ubytes[31] = 1
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maxunsigned := []byte{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}
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packed := packNum(reflect.ValueOf(1))
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if !bytes.Equal(packed, ubytes) {
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t.Errorf("expected %x got %x", ubytes, packed)
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}
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packed = packNum(reflect.ValueOf(-1))
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if !bytes.Equal(packed, maxunsigned) {
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t.Errorf("expected %x got %x", maxunsigned, packed)
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}
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packed = packNum(reflect.ValueOf("string"))
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if packed != nil {
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t.Errorf("expected 'string' to pack to nil. got %x instead", packed)
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}
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}
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func TestSigned(t *testing.T) {
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if isSigned(reflect.ValueOf(uint(10))) {
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t.Error("signed")
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}
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if !isSigned(reflect.ValueOf(int(10))) {
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t.Error("not signed")
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}
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}
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