accounts/abi: add another unpack interface
This commit is contained in:
Martin Holst Swende
parent
5603715c06
commit
1ede68355d
@ -136,11 +136,11 @@ func (abi *ABI) UnmarshalJSON(data []byte) error {
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// MethodById looks up a method by the 4-byte id
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// returns nil if none found
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func (abi *ABI) MethodById(sigdata []byte) *Method {
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func (abi *ABI) MethodById(sigdata []byte) (*Method, error){
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for _, method := range abi.Methods {
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if bytes.Equal(method.Id(), sigdata[:4]) {
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return &method
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return &method, nil
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}
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}
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return nil
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return nil, fmt.Errorf("ABI spec does not contain method signature in data: 0x%x", sigdata[:4])
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}
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@ -689,7 +689,11 @@ func TestABI_MethodById(t *testing.T) {
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}
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for name, m := range abi.Methods {
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a := fmt.Sprintf("%v", m)
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b := fmt.Sprintf("%v", abi.MethodById(m.Id()))
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m2,err := abi.MethodById(m.Id())
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if err != nil {
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t.Fatal(err)
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}
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b := fmt.Sprintf("%v", m2)
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if a != b {
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t.Errorf("Method %v (id %v) not 'findable' by id in ABI", name, common.ToHex(m.Id()))
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}
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@ -67,6 +67,16 @@ func (arguments Arguments) LengthNonIndexed() int {
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return out
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}
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func (arguments Arguments) NonIndexed() Arguments{
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var ret []Argument
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for _,arg := range arguments{
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if !arg.Indexed{
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ret = append(ret, arg)
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}
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}
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return ret
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}
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// isTuple returns true for non-atomic constructs, like (uint,uint) or uint[]
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func (arguments Arguments) isTuple() bool {
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return len(arguments) > 1
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@ -114,14 +124,9 @@ func (arguments Arguments) unpackTuple(v interface{}, output []byte) error {
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// `j` counts the number of complex types.
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// both `i` and `j` are used to to correctly compute `data` offset.
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i, j := -1, 0
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for _, arg := range arguments {
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j := 0
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for i, arg := range arguments.NonIndexed() {
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if arg.Indexed {
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// can't read, continue
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continue
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}
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i++
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marshalledValue, err := toGoType((i+j)*32, arg.Type, output)
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if err != nil {
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return err
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@ -178,7 +183,6 @@ func (arguments Arguments) unpackAtomic(v interface{}, output []byte) error {
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}
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value := valueOf.Elem()
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marshalledValue, err := toGoType(0, arg.Type, output)
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if err != nil {
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return err
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@ -186,7 +190,44 @@ func (arguments Arguments) unpackAtomic(v interface{}, output []byte) error {
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return set(value, reflect.ValueOf(marshalledValue), arg)
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}
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// Unpack performs the operation Go format -> Hexdata
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// UnpackValues can be used to unpack ABI-encoded hexdata according to the ABI-specification,
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// without supplying a struct to unpack into. Instead, this method returns a list containing the
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// values. An atomic argument will be a list with one element.
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func (arguments Arguments) UnpackValues(data []byte) ([]interface{}, error){
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retval := make([]interface{},0,arguments.LengthNonIndexed())
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virtualArgs := 0
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for index,arg:= range arguments.NonIndexed(){
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marshalledValue, err := toGoType((index + virtualArgs) * 32, arg.Type, data)
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if arg.Type.T == ArrayTy {
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//If we have a static array, like [3]uint256, these are coded as
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// just like uint256,uint256,uint256.
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// This means that we need to add two 'virtual' arguments when
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// we count the index from now on
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virtualArgs += arg.Type.Size - 1
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}
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if err != nil{
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return nil, err
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}
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retval = append(retval, marshalledValue)
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}
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return retval, nil
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}
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// UnpackValues performs the operation Go format -> Hexdata
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// It is the semantic opposite of UnpackValues
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func (arguments Arguments) PackValues(args []interface{}) ([]byte, error) {
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return arguments.Pack(args...)
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}
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// Pack performs the operation Go format -> Hexdata
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func (arguments Arguments) Pack(args ...interface{}) ([]byte, error) {
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// Make sure arguments match up and pack them
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abiArgs := arguments
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@ -130,7 +130,7 @@ var unpackTests = []unpackTest{
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{
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def: `[{"type": "bytes32"}]`,
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enc: "0100000000000000000000000000000000000000000000000000000000000000",
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want: common.HexToHash("0100000000000000000000000000000000000000000000000000000000000000"),
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want: [32]byte{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
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},
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{
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def: `[{"type": "function"}]`,
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336
accounts/abi/unpackv2_test.go
Normal file
336
accounts/abi/unpackv2_test.go
Normal file
@ -0,0 +1,336 @@
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// 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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"encoding/hex"
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"fmt"
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"math/big"
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"reflect"
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"strconv"
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"strings"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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)
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func TestUnpackV2(t *testing.T) {
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for i, test := range unpackTests {
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t.Run(strconv.Itoa(i), func(t *testing.T) {
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def := fmt.Sprintf(`[{ "name" : "method", "outputs": %s}]`, test.def)
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abi, err := JSON(strings.NewReader(def))
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if err != nil {
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t.Fatalf("invalid ABI definition %s: %v", def, err)
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}
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encb, err := hex.DecodeString(test.enc)
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if err != nil {
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t.Fatalf("invalid hex: %s" + test.enc)
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}
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out, err := abi.Methods["method"].Outputs.UnpackValues(encb)
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if err != nil {
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t.Fatal(err)
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}
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if len(test.err) != 0 {
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// The new stuff doesn't have these types of errors
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return
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}
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if !reflect.DeepEqual(test.want, out[0]) {
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t.Errorf("test %d (%v) failed: expected %v, got %v", i, test.def, test.want, out[0])
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}
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})
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}
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}
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func TestMultiReturnWithArrayV2(t *testing.T) {
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const definition = `[{"name" : "multi", "outputs": [{"type": "uint64[3]"}, {"type": "uint64"}]}]`
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abi, err := JSON(strings.NewReader(definition))
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if err != nil {
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t.Fatal(err)
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}
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buff := new(bytes.Buffer)
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buff.Write(common.Hex2Bytes("000000000000000000000000000000000000000000000000000000000000000900000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000007"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000006"))
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out, err := abi.Methods["multi"].Outputs.UnpackValues(buff.Bytes())
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ret1Exp := [3]uint64{9, 8, 7}
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ret2Exp := uint64(6)
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if !reflect.DeepEqual(out[0], ret1Exp) {
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t.Error("array result", out[0], "!= Expected", ret1Exp)
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}
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if out[1] != ret2Exp {
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t.Error("int result", out[1], "!= Expected", ret2Exp)
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}
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}
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func TestUnmarshalV2(t *testing.T) {
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const definition = `[
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{ "name" : "int", "constant" : false, "outputs": [ { "type": "uint256" } ] },
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{ "name" : "bool", "constant" : false, "outputs": [ { "type": "bool" } ] },
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{ "name" : "bytes", "constant" : false, "outputs": [ { "type": "bytes" } ] },
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{ "name" : "fixed", "constant" : false, "outputs": [ { "type": "bytes32" } ] },
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{ "name" : "multi", "constant" : false, "outputs": [ { "type": "bytes" }, { "type": "bytes" } ] },
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{ "name" : "intArraySingle", "constant" : false, "outputs": [ { "type": "uint256[3]" } ] },
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{ "name" : "addressSliceSingle", "constant" : false, "outputs": [ { "type": "address[]" } ] },
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{ "name" : "addressSliceDouble", "constant" : false, "outputs": [ { "name": "a", "type": "address[]" }, { "name": "b", "type": "address[]" } ] },
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{ "name" : "mixedBytes", "constant" : true, "outputs": [ { "name": "a", "type": "bytes" }, { "name": "b", "type": "bytes32" } ] }]`
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abi, err := JSON(strings.NewReader(definition))
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if err != nil {
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t.Fatal(err)
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}
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buff := new(bytes.Buffer)
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// marshall mixed bytes (mixedBytes)
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p0Exp := common.Hex2Bytes("01020000000000000000")
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p1Exp := common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000ddeeff")
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000040"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000ddeeff"))
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buff.Write(common.Hex2Bytes("000000000000000000000000000000000000000000000000000000000000000a"))
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buff.Write(common.Hex2Bytes("0102000000000000000000000000000000000000000000000000000000000000"))
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mixedBytes, err := abi.Methods["mixedBytes"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Error(err)
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} else {
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p0 := mixedBytes[0].([]byte)
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p1 := mixedBytes[1].([32]byte)
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if !bytes.Equal(p0, p0Exp) {
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t.Errorf("unexpected value unpacked: want %x, got %x", p0Exp, p0)
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}
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if !bytes.Equal(p1[:], p1Exp) {
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t.Errorf("unexpected value unpacked: want %x, got %x", p1Exp, p1)
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}
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}
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// marshal int
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integer, err := abi.Methods["int"].Outputs.UnpackValues(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
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if err != nil {
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t.Error(err)
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}
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if len(integer) == 0 {
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t.Error("Expected one integer")
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}
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intval := integer[0].(*big.Int)
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if intval == nil || intval.Cmp(big.NewInt(1)) != 0 {
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t.Error("expected Int to be 1 got", intval)
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}
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// marshal bool
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boolreturns, err := abi.Methods["bool"].Outputs.UnpackValues(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
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if err != nil {
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t.Error(err)
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}
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boolval := boolreturns[0].(bool)
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if !boolval {
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t.Error("expected Bool to be true")
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}
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// marshal dynamic bytes max length 32
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buff.Reset()
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
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bytesOut := common.RightPadBytes([]byte("hello"), 32)
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buff.Write(bytesOut)
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bytesreturns, err := abi.Methods["bytes"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Error(err)
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}
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bytesval := bytesreturns[0].([]byte)
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if !bytes.Equal(bytesval, bytesOut) {
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t.Errorf("expected %x got %x", bytesOut, bytesval)
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}
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// marshall dynamic bytes max length 64
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buff.Reset()
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000040"))
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bytesOut = common.RightPadBytes([]byte("hello"), 64)
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buff.Write(bytesOut)
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bytesreturns, err = abi.Methods["bytes"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Error(err)
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}
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bytesval = bytesreturns[0].([]byte)
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if !bytes.Equal(bytesval, bytesOut) {
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t.Errorf("expected %x got %x", bytesOut, bytesval)
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}
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// marshall dynamic bytes max length 64
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buff.Reset()
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
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buff.Write(common.Hex2Bytes("000000000000000000000000000000000000000000000000000000000000003f"))
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bytesOut = common.RightPadBytes([]byte("hello"), 64)
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buff.Write(bytesOut)
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bytesreturns, err = abi.Methods["bytes"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Error(err)
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}
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bytesval = bytesreturns[0].([]byte)
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if !bytes.Equal(bytesval, bytesOut[:len(bytesOut)-1]) {
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t.Errorf("expected %x got %x", bytesOut[:len(bytesOut)-1], bytesval)
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}
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// marshal dynamic bytes output empty (nil)
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bytesreturns, err = abi.Methods["bytes"].Outputs.UnpackValues(nil)
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if err == nil {
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t.Error("expected error")
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}
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// marshal dynamic bytes output empty
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buff.Reset()
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bytesreturns, err = abi.Methods["bytes"].Outputs.UnpackValues(buff.Bytes())
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if err == nil {
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t.Error("expected error")
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}
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// marshal dynamic bytes length 5
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buff.Reset()
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000005"))
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buff.Write(common.RightPadBytes([]byte("hello"), 32))
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bytesreturns, err = abi.Methods["bytes"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Error(err)
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}
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bytesval = bytesreturns[0].([]byte)
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if !bytes.Equal(bytesval, []byte("hello")) {
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t.Errorf("expected %x got %x", bytesOut, bytesval)
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}
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// marshal dynamic bytes length 5
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buff.Reset()
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buff.Write(common.RightPadBytes([]byte("hello"), 32))
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hashreturns, err := abi.Methods["fixed"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Error(err)
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}
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hashval := hashreturns[0].([32]byte)
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helloHash := common.BytesToHash(common.RightPadBytes([]byte("hello"), 32))
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if common.Hash(hashval) != helloHash {
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t.Errorf("Expected %x to equal %x", hashval, helloHash)
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}
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// marshal error
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buff.Reset()
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020"))
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bytesreturns, err = abi.Methods["bytes"].Outputs.UnpackValues(buff.Bytes())
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if err == nil {
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// Error abi: cannot marshal in to go slice: offset 32 would go over slice boundary (len=64)
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t.Error("expected error")
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}
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bytesreturns, err = abi.Methods["multi"].Outputs.UnpackValues(make([]byte, 64))
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buff.Reset()
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000002"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000003"))
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// marshal int array
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intArrayReturns, err := abi.Methods["intArraySingle"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Error(err)
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}
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intArray := intArrayReturns[0].([3]*big.Int)
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var testAgainstIntArray = [3]*big.Int{big.NewInt(1), big.NewInt(2), big.NewInt(3)}
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for i, intval := range intArray {
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if intval.Cmp(testAgainstIntArray[i]) != 0 {
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t.Errorf("expected %v, got %v", testAgainstIntArray[i], intval)
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}
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}
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// marshal address slice
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buff.Reset()
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000020")) // offset
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001")) // size
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buff.Write(common.Hex2Bytes("0000000000000000000000000100000000000000000000000000000000000000"))
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outAddrReturns, err := abi.Methods["addressSliceSingle"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Fatal("didn't expect error:", err)
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}
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outAddr := outAddrReturns[0].([]common.Address)
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if len(outAddr) != 1 {
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t.Fatal("expected 1 item, got", len(outAddr))
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}
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if outAddr[0] != (common.Address{1}) {
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t.Errorf("expected %x, got %x", common.Address{1}, outAddr[0])
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}
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// marshal multiple address slice
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buff.Reset()
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000040")) // offset
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000080")) // offset
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001")) // size
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buff.Write(common.Hex2Bytes("0000000000000000000000000100000000000000000000000000000000000000"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000002")) // size
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buff.Write(common.Hex2Bytes("0000000000000000000000000200000000000000000000000000000000000000"))
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buff.Write(common.Hex2Bytes("0000000000000000000000000300000000000000000000000000000000000000"))
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outAddrStructReturns, err := abi.Methods["addressSliceDouble"].Outputs.UnpackValues(buff.Bytes())
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if err != nil {
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t.Fatal("didn't expect error:", err)
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}
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A := outAddrStructReturns[0].([]common.Address)
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B := outAddrStructReturns[1].([]common.Address)
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if len(A) != 1 {
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t.Fatal("expected 1 item, got", len(A))
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}
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if A[0] != (common.Address{1}) {
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t.Errorf("expected %x, got %x", common.Address{1}, A[0])
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}
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if len(B) != 2 {
|
||||
t.Fatal("expected 1 item, got", len(B))
|
||||
}
|
||||
|
||||
if B[0] != (common.Address{2}) {
|
||||
t.Errorf("expected %x, got %x", common.Address{2}, B[0])
|
||||
}
|
||||
if B[1] != (common.Address{3}) {
|
||||
t.Errorf("expected %x, got %x", common.Address{3}, B[1])
|
||||
}
|
||||
|
||||
// marshal invalid address slice
|
||||
buff.Reset()
|
||||
buff.Write(common.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000100"))
|
||||
|
||||
err = abi.Unpack(&outAddr, "addressSliceSingle", buff.Bytes())
|
||||
_, err = abi.Methods["addressSliceSingle"].Outputs.UnpackValues(buff.Bytes())
|
||||
if err == nil {
|
||||
t.Fatal("expected error:", err)
|
||||
}
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user