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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?
66 lines
2.1 KiB
Go
66 lines
2.1 KiB
Go
// Copyright 2016 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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"reflect"
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"github.com/ethereum/go-ethereum/common"
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)
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// packBytesSlice packs the given bytes as [L, V] as the canonical representation
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// bytes slice
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func packBytesSlice(bytes []byte, l int) []byte {
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len := packNum(reflect.ValueOf(l))
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return append(len, common.RightPadBytes(bytes, (l+31)/32*32)...)
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}
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// packElement packs the given reflect value according to the abi specification in
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// t.
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func packElement(t Type, reflectValue reflect.Value) []byte {
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switch t.T {
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case IntTy, UintTy:
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return packNum(reflectValue)
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case StringTy:
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return packBytesSlice([]byte(reflectValue.String()), reflectValue.Len())
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case AddressTy:
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if reflectValue.Kind() == reflect.Array {
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reflectValue = mustArrayToByteSlice(reflectValue)
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}
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return common.LeftPadBytes(reflectValue.Bytes(), 32)
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case BoolTy:
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if reflectValue.Bool() {
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return common.LeftPadBytes(common.Big1.Bytes(), 32)
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} else {
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return common.LeftPadBytes(common.Big0.Bytes(), 32)
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}
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case BytesTy:
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if reflectValue.Kind() == reflect.Array {
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reflectValue = mustArrayToByteSlice(reflectValue)
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}
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return packBytesSlice(reflectValue.Bytes(), reflectValue.Len())
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case FixedBytesTy:
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if reflectValue.Kind() == reflect.Array {
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reflectValue = mustArrayToByteSlice(reflectValue)
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}
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return common.RightPadBytes(reflectValue.Bytes(), 32)
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}
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panic("abi: fatal error")
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}
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