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393 lines
12 KiB
393 lines
12 KiB
// 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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"bytes"
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"encoding/hex"
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"encoding/json"
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"math/big"
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"reflect"
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"strings"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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var jsonEventTransfer = []byte(`{
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"anonymous": false,
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"inputs": [
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{
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"indexed": true, "name": "from", "type": "address"
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}, {
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"indexed": true, "name": "to", "type": "address"
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}, {
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"indexed": false, "name": "value", "type": "uint256"
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}],
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"name": "Transfer",
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"type": "event"
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}`)
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var jsonEventPledge = []byte(`{
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"anonymous": false,
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"inputs": [{
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"indexed": false, "name": "who", "type": "address"
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}, {
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"indexed": false, "name": "wad", "type": "uint128"
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}, {
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"indexed": false, "name": "currency", "type": "bytes3"
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}],
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"name": "Pledge",
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"type": "event"
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}`)
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var jsonEventMixedCase = []byte(`{
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"anonymous": false,
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"inputs": [{
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"indexed": false, "name": "value", "type": "uint256"
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}, {
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"indexed": false, "name": "_value", "type": "uint256"
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}, {
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"indexed": false, "name": "Value", "type": "uint256"
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}],
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"name": "MixedCase",
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"type": "event"
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}`)
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// 1000000
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var transferData1 = "00000000000000000000000000000000000000000000000000000000000f4240"
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// "0x00Ce0d46d924CC8437c806721496599FC3FFA268", 2218516807680, "usd"
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var pledgeData1 = "00000000000000000000000000ce0d46d924cc8437c806721496599fc3ffa2680000000000000000000000000000000000000000000000000000020489e800007573640000000000000000000000000000000000000000000000000000000000"
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// 1000000,2218516807680,1000001
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var mixedCaseData1 = "00000000000000000000000000000000000000000000000000000000000f42400000000000000000000000000000000000000000000000000000020489e8000000000000000000000000000000000000000000000000000000000000000f4241"
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func TestEventId(t *testing.T) {
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var table = []struct {
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definition string
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expectations map[string]common.Hash
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}{
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{
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definition: `[
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{ "type" : "event", "name" : "Balance", "inputs": [{ "name" : "in", "type": "uint256" }] },
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{ "type" : "event", "name" : "Check", "inputs": [{ "name" : "t", "type": "address" }, { "name": "b", "type": "uint256" }] }
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]`,
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expectations: map[string]common.Hash{
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"Balance": crypto.Keccak256Hash([]byte("Balance(uint256)")),
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"Check": crypto.Keccak256Hash([]byte("Check(address,uint256)")),
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},
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},
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}
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for _, test := range table {
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abi, err := JSON(strings.NewReader(test.definition))
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if err != nil {
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t.Fatal(err)
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}
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for name, event := range abi.Events {
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if event.ID() != test.expectations[name] {
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t.Errorf("expected id to be %x, got %x", test.expectations[name], event.ID())
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}
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}
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}
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}
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func TestEventString(t *testing.T) {
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var table = []struct {
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definition string
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expectations map[string]string
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}{
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{
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definition: `[
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{ "type" : "event", "name" : "Balance", "inputs": [{ "name" : "in", "type": "uint256" }] },
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{ "type" : "event", "name" : "Check", "inputs": [{ "name" : "t", "type": "address" }, { "name": "b", "type": "uint256" }] },
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{ "type" : "event", "name" : "Transfer", "inputs": [{ "name": "from", "type": "address", "indexed": true }, { "name": "to", "type": "address", "indexed": true }, { "name": "value", "type": "uint256" }] }
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]`,
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expectations: map[string]string{
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"Balance": "event Balance(uint256 in)",
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"Check": "event Check(address t, uint256 b)",
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"Transfer": "event Transfer(address indexed from, address indexed to, uint256 value)",
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},
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},
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}
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for _, test := range table {
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abi, err := JSON(strings.NewReader(test.definition))
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if err != nil {
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t.Fatal(err)
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}
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for name, event := range abi.Events {
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if event.String() != test.expectations[name] {
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t.Errorf("expected string to be %s, got %s", test.expectations[name], event.String())
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}
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}
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}
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}
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// TestEventMultiValueWithArrayUnpack verifies that array fields will be counted after parsing array.
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func TestEventMultiValueWithArrayUnpack(t *testing.T) {
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definition := `[{"name": "test", "type": "event", "inputs": [{"indexed": false, "name":"value1", "type":"uint8[2]"},{"indexed": false, "name":"value2", "type":"uint8"}]}]`
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type testStruct struct {
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Value1 [2]uint8
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Value2 uint8
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}
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abi, err := JSON(strings.NewReader(definition))
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require.NoError(t, err)
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var b bytes.Buffer
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var i uint8 = 1
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for ; i <= 3; i++ {
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b.Write(packNum(reflect.ValueOf(i)))
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}
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var rst testStruct
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require.NoError(t, abi.Unpack(&rst, "test", b.Bytes()))
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require.Equal(t, [2]uint8{1, 2}, rst.Value1)
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require.Equal(t, uint8(3), rst.Value2)
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}
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func TestEventTupleUnpack(t *testing.T) {
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type EventTransfer struct {
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Value *big.Int
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}
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type EventTransferWithTag struct {
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// this is valid because `value` is not exportable,
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// so value is only unmarshalled into `Value1`.
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Value1 *big.Int `abi:"value"`
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}
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type BadEventTransferWithSameFieldAndTag struct {
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Value *big.Int
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Value1 *big.Int `abi:"value"`
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}
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type BadEventTransferWithDuplicatedTag struct {
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Value1 *big.Int `abi:"value"`
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Value2 *big.Int `abi:"value"`
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}
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type BadEventTransferWithEmptyTag struct {
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Value *big.Int `abi:""`
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}
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type EventPledge struct {
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Who common.Address
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Wad *big.Int
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Currency [3]byte
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}
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type BadEventPledge struct {
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Who string
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Wad int
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Currency [3]byte
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}
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type EventMixedCase struct {
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Value1 *big.Int `abi:"value"`
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Value2 *big.Int `abi:"_value"`
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Value3 *big.Int `abi:"Value"`
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}
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bigint := new(big.Int)
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bigintExpected := big.NewInt(1000000)
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bigintExpected2 := big.NewInt(2218516807680)
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bigintExpected3 := big.NewInt(1000001)
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addr := common.HexToAddress("0x00Ce0d46d924CC8437c806721496599FC3FFA268")
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var testCases = []struct {
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data string
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dest interface{}
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expected interface{}
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jsonLog []byte
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error string
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name string
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}{{
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transferData1,
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&EventTransfer{},
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&EventTransfer{Value: bigintExpected},
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jsonEventTransfer,
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"",
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"Can unpack ERC20 Transfer event into structure",
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}, {
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transferData1,
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&[]interface{}{&bigint},
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&[]interface{}{&bigintExpected},
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jsonEventTransfer,
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"",
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"Can unpack ERC20 Transfer event into slice",
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}, {
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transferData1,
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&EventTransferWithTag{},
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&EventTransferWithTag{Value1: bigintExpected},
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jsonEventTransfer,
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"",
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"Can unpack ERC20 Transfer event into structure with abi: tag",
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}, {
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transferData1,
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&BadEventTransferWithDuplicatedTag{},
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&BadEventTransferWithDuplicatedTag{},
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jsonEventTransfer,
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"struct: abi tag in 'Value2' already mapped",
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"Can not unpack ERC20 Transfer event with duplicated abi tag",
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}, {
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transferData1,
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&BadEventTransferWithSameFieldAndTag{},
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&BadEventTransferWithSameFieldAndTag{},
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jsonEventTransfer,
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"abi: multiple variables maps to the same abi field 'value'",
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"Can not unpack ERC20 Transfer event with a field and a tag mapping to the same abi variable",
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}, {
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transferData1,
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&BadEventTransferWithEmptyTag{},
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&BadEventTransferWithEmptyTag{},
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jsonEventTransfer,
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"struct: abi tag in 'Value' is empty",
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"Can not unpack ERC20 Transfer event with an empty tag",
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}, {
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pledgeData1,
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&EventPledge{},
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&EventPledge{
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addr,
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bigintExpected2,
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[3]byte{'u', 's', 'd'}},
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jsonEventPledge,
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"",
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"Can unpack Pledge event into structure",
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}, {
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pledgeData1,
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&[]interface{}{&common.Address{}, &bigint, &[3]byte{}},
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&[]interface{}{
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&addr,
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&bigintExpected2,
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&[3]byte{'u', 's', 'd'}},
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jsonEventPledge,
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"",
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"Can unpack Pledge event into slice",
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}, {
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pledgeData1,
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&[3]interface{}{&common.Address{}, &bigint, &[3]byte{}},
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&[3]interface{}{
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&addr,
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&bigintExpected2,
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&[3]byte{'u', 's', 'd'}},
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jsonEventPledge,
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"",
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"Can unpack Pledge event into an array",
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}, {
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pledgeData1,
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&[]interface{}{new(int), 0, 0},
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&[]interface{}{},
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jsonEventPledge,
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"abi: cannot unmarshal common.Address in to int",
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"Can not unpack Pledge event into slice with wrong types",
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}, {
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pledgeData1,
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&BadEventPledge{},
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&BadEventPledge{},
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jsonEventPledge,
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"abi: cannot unmarshal common.Address in to string",
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"Can not unpack Pledge event into struct with wrong filed types",
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}, {
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pledgeData1,
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&[]interface{}{common.Address{}, new(big.Int)},
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&[]interface{}{},
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jsonEventPledge,
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"abi: insufficient number of elements in the list/array for unpack, want 3, got 2",
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"Can not unpack Pledge event into too short slice",
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}, {
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pledgeData1,
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new(map[string]interface{}),
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&[]interface{}{},
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jsonEventPledge,
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"abi: cannot unmarshal tuple into map[string]interface {}",
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"Can not unpack Pledge event into map",
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}, {
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mixedCaseData1,
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&EventMixedCase{},
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&EventMixedCase{Value1: bigintExpected, Value2: bigintExpected2, Value3: bigintExpected3},
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jsonEventMixedCase,
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"",
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"Can unpack abi variables with mixed case",
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}}
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for _, tc := range testCases {
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assert := assert.New(t)
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tc := tc
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t.Run(tc.name, func(t *testing.T) {
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err := unpackTestEventData(tc.dest, tc.data, tc.jsonLog, assert)
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if tc.error == "" {
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assert.Nil(err, "Should be able to unpack event data.")
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assert.Equal(tc.expected, tc.dest, tc.name)
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} else {
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assert.EqualError(err, tc.error, tc.name)
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}
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})
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}
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}
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func unpackTestEventData(dest interface{}, hexData string, jsonEvent []byte, assert *assert.Assertions) error {
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data, err := hex.DecodeString(hexData)
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assert.NoError(err, "Hex data should be a correct hex-string")
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var e Event
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assert.NoError(json.Unmarshal(jsonEvent, &e), "Should be able to unmarshal event ABI")
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a := ABI{Events: map[string]Event{"e": e}}
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return a.Unpack(dest, "e", data)
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}
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// TestEventUnpackIndexed verifies that indexed field will be skipped by event decoder.
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func TestEventUnpackIndexed(t *testing.T) {
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definition := `[{"name": "test", "type": "event", "inputs": [{"indexed": true, "name":"value1", "type":"uint8"},{"indexed": false, "name":"value2", "type":"uint8"}]}]`
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type testStruct struct {
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Value1 uint8
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Value2 uint8
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}
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abi, err := JSON(strings.NewReader(definition))
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require.NoError(t, err)
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var b bytes.Buffer
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b.Write(packNum(reflect.ValueOf(uint8(8))))
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var rst testStruct
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require.NoError(t, abi.Unpack(&rst, "test", b.Bytes()))
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require.Equal(t, uint8(0), rst.Value1)
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require.Equal(t, uint8(8), rst.Value2)
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}
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// TestEventIndexedWithArrayUnpack verifies that decoder will not overlow when static array is indexed input.
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func TestEventIndexedWithArrayUnpack(t *testing.T) {
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definition := `[{"name": "test", "type": "event", "inputs": [{"indexed": true, "name":"value1", "type":"uint8[2]"},{"indexed": false, "name":"value2", "type":"string"}]}]`
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type testStruct struct {
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Value1 [2]uint8
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Value2 string
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}
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abi, err := JSON(strings.NewReader(definition))
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require.NoError(t, err)
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var b bytes.Buffer
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stringOut := "abc"
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// number of fields that will be encoded * 32
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b.Write(packNum(reflect.ValueOf(32)))
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b.Write(packNum(reflect.ValueOf(len(stringOut))))
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b.Write(common.RightPadBytes([]byte(stringOut), 32))
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var rst testStruct
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require.NoError(t, abi.Unpack(&rst, "test", b.Bytes()))
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require.Equal(t, [2]uint8{0, 0}, rst.Value1)
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require.Equal(t, stringOut, rst.Value2)
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}
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