// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package abi
import (
"bytes"
"encoding/hex"
"fmt"
"log"
"math/big"
"reflect"
"strings"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
)
const jsondata = `
[
{ "type" : "function", "name" : "balance", "constant" : true },
{ "type" : "function", "name" : "send", "constant" : false, "inputs" : [ { "name" : "amount", "type" : "uint256" } ] }
]`
const jsondata2 = `
[
{ "type" : "function", "name" : "balance", "constant" : true },
{ "type" : "function", "name" : "send", "constant" : false, "inputs" : [ { "name" : "amount", "type" : "uint256" } ] },
{ "type" : "function", "name" : "test", "constant" : false, "inputs" : [ { "name" : "number", "type" : "uint32" } ] },
{ "type" : "function", "name" : "string", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "string" } ] },
{ "type" : "function", "name" : "bool", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "bool" } ] },
{ "type" : "function", "name" : "address", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "address" } ] },
{ "type" : "function", "name" : "uint64[2]", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint64[2]" } ] },
{ "type" : "function", "name" : "uint64[]", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint64[]" } ] },
{ "type" : "function", "name" : "foo", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32" } ] },
{ "type" : "function", "name" : "bar", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32" }, { "name" : "string", "type" : "uint16" } ] },
{ "type" : "function", "name" : "slice", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint32[2]" } ] },
{ "type" : "function", "name" : "slice256", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "uint256[2]" } ] },
{ "type" : "function", "name" : "sliceAddress", "constant" : false, "inputs" : [ { "name" : "inputs", "type" : "address[]" } ] },
{ "type" : "function", "name" : "sliceMultiAddress", "constant" : false, "inputs" : [ { "name" : "a", "type" : "address[]" }, { "name" : "b", "type" : "address[]" } ] },
{ "type" : "function", "name" : "nestedArray", "constant" : false, "inputs" : [ { "name" : "a", "type" : "uint256[2][2]" }, { "name" : "b", "type" : "address[]" } ] },
{ "type" : "function", "name" : "nestedArray2", "constant" : false, "inputs" : [ { "name" : "a", "type" : "uint8[][2]" } ] },
{ "type" : "function", "name" : "nestedSlice", "constant" : false, "inputs" : [ { "name" : "a", "type" : "uint8[][]" } ] }
]`
func TestReader(t *testing.T) {
Uint256, _ := NewType("uint256", nil)
exp := ABI{
Methods: map[string]Method{
"balance": {
"balance", true, nil, nil,
},
"send": {
"send", false, []Argument{
{"amount", Uint256, false},
}, nil,
},
},
}
abi, err := JSON(strings.NewReader(jsondata))
if err != nil {
t.Error(err)
}
// deep equal fails for some reason
for name, expM := range exp.Methods {
gotM, exist := abi.Methods[name]
if !exist {
t.Errorf("Missing expected method %v", name)
}
if !reflect.DeepEqual(gotM, expM) {
t.Errorf("\nGot abi method: \n%v\ndoes not match expected method\n%v", gotM, expM)
}
}
for name, gotM := range abi.Methods {
expM, exist := exp.Methods[name]
if !exist {
t.Errorf("Found extra method %v", name)
}
if !reflect.DeepEqual(gotM, expM) {
t.Errorf("\nGot abi method: \n%v\ndoes not match expected method\n%v", gotM, expM)
}
}
}
func TestTestNumbers(t *testing.T) {
abi, err := JSON(strings.NewReader(jsondata2))
if err != nil {
t.Error(err)
t.FailNow()
}
if _, err := abi.Pack("balance"); err != nil {
t.Error(err)
}
if _, err := abi.Pack("balance", 1); err == nil {
t.Error("expected error for balance(1)")
}
if _, err := abi.Pack("doesntexist", nil); err == nil {
t.Errorf("doesntexist shouldn't exist")
}
if _, err := abi.Pack("doesntexist", 1); err == nil {
t.Errorf("doesntexist(1) shouldn't exist")
}
if _, err := abi.Pack("send", big.NewInt(1000)); err != nil {
t.Error(err)
}
i := new(int)
*i = 1000
if _, err := abi.Pack("send", i); err == nil {
t.Errorf("expected send( ptr ) to throw, requires *big.Int instead of *int")
}
if _, err := abi.Pack("test", uint32(1000)); err != nil {
t.Error(err)
}
}
func TestTestString(t *testing.T) {
abi, err := JSON(strings.NewReader(jsondata2))
if err != nil {
t.Error(err)
t.FailNow()
}
if _, err := abi.Pack("string", "hello world"); err != nil {
t.Error(err)
}
}
func TestTestBool(t *testing.T) {
abi, err := JSON(strings.NewReader(jsondata2))
if err != nil {
t.Error(err)
t.FailNow()
}
if _, err := abi.Pack("bool", true); err != nil {
t.Error(err)
}
}
func TestTestSlice(t *testing.T) {
abi, err := JSON(strings.NewReader(jsondata2))
if err != nil {
t.Error(err)
t.FailNow()
}
slice := make([]uint64, 2)
if _, err := abi.Pack("uint64[2]", slice); err != nil {
t.Error(err)
}
if _, err := abi.Pack("uint64[]", slice); err != nil {
t.Error(err)
}
}
func TestMethodSignature(t *testing.T) {
String, _ := NewType("string", nil)
m := Method{"foo", false, []Argument{{"bar", String, false}, {"baz", String, false}}, nil}
exp := "foo(string,string)"
if m.Sig() != exp {
t.Error("signature mismatch", exp, "!=", m.Sig())
}
idexp := crypto.Keccak256([]byte(exp))[:4]
if !bytes.Equal(m.Id(), idexp) {
t.Errorf("expected ids to match %x != %x", m.Id(), idexp)
}
uintt, _ := NewType("uint256", nil)
m = Method{"foo", false, []Argument{{"bar", uintt, false}}, nil}
exp = "foo(uint256)"
if m.Sig() != exp {
t.Error("signature mismatch", exp, "!=", m.Sig())
}
// Method with tuple arguments
s, _ := NewType("tuple", []ArgumentMarshaling{
{Name: "a", Type: "int256"},
{Name: "b", Type: "int256[]"},
{Name: "c", Type: "tuple[]", Components: []ArgumentMarshaling{
{Name: "x", Type: "int256"},
{Name: "y", Type: "int256"},
}},
{Name: "d", Type: "tuple[2]", Components: []ArgumentMarshaling{
{Name: "x", Type: "int256"},
{Name: "y", Type: "int256"},
}},
})
m = Method{"foo", false, []Argument{{"s", s, false}, {"bar", String, false}}, nil}
exp = "foo((int256,int256[],(int256,int256)[],(int256,int256)[2]),string)"
if m.Sig() != exp {
t.Error("signature mismatch", exp, "!=", m.Sig())
}
}
func TestMultiPack(t *testing.T) {
abi, err := JSON(strings.NewReader(jsondata2))
if err != nil {
t.Error(err)
t.FailNow()
}
sig := crypto.Keccak256([]byte("bar(uint32,uint16)"))[:4]
sig = append(sig, make([]byte, 64)...)
sig[35] = 10
sig[67] = 11
packed, err := abi.Pack("bar", uint32(10), uint16(11))
if err != nil {
t.Error(err)
t.FailNow()
}
if !bytes.Equal(packed, sig) {
t.Errorf("expected %x got %x", sig, packed)
}
}
func ExampleJSON() {
const definition = `[{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"isBar","outputs":[{"name":"","type":"bool"}],"type":"function"}]`
abi, err := JSON(strings.NewReader(definition))
if err != nil {
log.Fatalln(err)
}
out, err := abi.Pack("isBar", common.HexToAddress("01"))
if err != nil {
log.Fatalln(err)
}
fmt.Printf("%x\n", out)
// Output:
// 1f2c40920000000000000000000000000000000000000000000000000000000000000001
}
func TestInputVariableInputLength(t *testing.T) {
const definition = `[
{ "type" : "function", "name" : "strOne", "constant" : true, "inputs" : [ { "name" : "str", "type" : "string" } ] },
{ "type" : "function", "name" : "bytesOne", "constant" : true, "inputs" : [ { "name" : "str", "type" : "bytes" } ] },
{ "type" : "function", "name" : "strTwo", "constant" : true, "inputs" : [ { "name" : "str", "type" : "string" }, { "name" : "str1", "type" : "string" } ] }
]`
abi, err := JSON(strings.NewReader(definition))
if err != nil {
t.Fatal(err)
}
// test one string
strin := "hello world"
strpack, err := abi.Pack("strOne", strin)
if err != nil {
t.Error(err)
}
offset := make([]byte, 32)
offset[31] = 32
length := make([]byte, 32)
length[31] = byte(len(strin))
value := common.RightPadBytes([]byte(strin), 32)
exp := append(offset, append(length, value...)...)
// ignore first 4 bytes of the output. This is the function identifier
strpack = strpack[4:]
if !bytes.Equal(strpack, exp) {
t.Errorf("expected %x, got %x\n", exp, strpack)
}
// test one bytes
btspack, err := abi.Pack("bytesOne", []byte(strin))
if err != nil {
t.Error(err)
}
// ignore first 4 bytes of the output. This is the function identifier
btspack = btspack[4:]
if !bytes.Equal(btspack, exp) {
t.Errorf("expected %x, got %x\n", exp, btspack)
}
// test two strings
str1 := "hello"
str2 := "world"
str2pack, err := abi.Pack("strTwo", str1, str2)
if err != nil {
t.Error(err)
}
offset1 := make([]byte, 32)
offset1[31] = 64
length1 := make([]byte, 32)
length1[31] = byte(len(str1))
value1 := common.RightPadBytes([]byte(str1), 32)
offset2 := make([]byte, 32)
offset2[31] = 128
length2 := make([]byte, 32)
length2[31] = byte(len(str2))
value2 := common.RightPadBytes([]byte(str2), 32)
exp2 := append(offset1, offset2...)
exp2 = append(exp2, append(length1, value1...)...)
exp2 = append(exp2, append(length2, value2...)...)
// ignore first 4 bytes of the output. This is the function identifier
str2pack = str2pack[4:]
if !bytes.Equal(str2pack, exp2) {
t.Errorf("expected %x, got %x\n", exp, str2pack)
}
// test two strings, first > 32, second < 32
str1 = strings.Repeat("a", 33)
str2pack, err = abi.Pack("strTwo", str1, str2)
if err != nil {
t.Error(err)
}
offset1 = make([]byte, 32)
offset1[31] = 64
length1 = make([]byte, 32)
length1[31] = byte(len(str1))
value1 = common.RightPadBytes([]byte(str1), 64)
offset2[31] = 160
exp2 = append(offset1, offset2...)
exp2 = append(exp2, append(length1, value1...)...)
exp2 = append(exp2, append(length2, value2...)...)
// ignore first 4 bytes of the output. This is the function identifier
str2pack = str2pack[4:]
if !bytes.Equal(str2pack, exp2) {
t.Errorf("expected %x, got %x\n", exp, str2pack)
}
// test two strings, first > 32, second >32
str1 = strings.Repeat("a", 33)
str2 = strings.Repeat("a", 33)
str2pack, err = abi.Pack("strTwo", str1, str2)
if err != nil {
t.Error(err)
}
offset1 = make([]byte, 32)
offset1[31] = 64
length1 = make([]byte, 32)
length1[31] = byte(len(str1))
value1 = common.RightPadBytes([]byte(str1), 64)
offset2 = make([]byte, 32)
offset2[31] = 160
length2 = make([]byte, 32)
length2[31] = byte(len(str2))
value2 = common.RightPadBytes([]byte(str2), 64)
exp2 = append(offset1, offset2...)
exp2 = append(exp2, append(length1, value1...)...)
exp2 = append(exp2, append(length2, value2...)...)
// ignore first 4 bytes of the output. This is the function identifier
str2pack = str2pack[4:]
if !bytes.Equal(str2pack, exp2) {
t.Errorf("expected %x, got %x\n", exp, str2pack)
}
}
func TestInputFixedArrayAndVariableInputLength(t *testing.T) {
const definition = `[
{ "type" : "function", "name" : "fixedArrStr", "constant" : true, "inputs" : [ { "name" : "str", "type" : "string" }, { "name" : "fixedArr", "type" : "uint256[2]" } ] },
{ "type" : "function", "name" : "fixedArrBytes", "constant" : true, "inputs" : [ { "name" : "str", "type" : "bytes" }, { "name" : "fixedArr", "type" : "uint256[2]" } ] },
{ "type" : "function", "name" : "mixedArrStr", "constant" : true, "inputs" : [ { "name" : "str", "type" : "string" }, { "name" : "fixedArr", "type": "uint256[2]" }, { "name" : "dynArr", "type": "uint256[]" } ] },
{ "type" : "function", "name" : "doubleFixedArrStr", "constant" : true, "inputs" : [ { "name" : "str", "type" : "string" }, { "name" : "fixedArr1", "type": "uint256[2]" }, { "name" : "fixedArr2", "type": "uint256[3]" } ] },
{ "type" : "function", "name" : "multipleMixedArrStr", "constant" : true, "inputs" : [ { "name" : "str", "type" : "string" }, { "name" : "fixedArr1", "type": "uint256[2]" }, { "name" : "dynArr", "type" : "uint256[]" }, { "name" : "fixedArr2", "type" : "uint256[3]" } ] }
]`
abi, err := JSON(strings.NewReader(definition))
if err != nil {
t.Error(err)
}
// test string, fixed array uint256[2]
strin := "hello world"
arrin := [2]*big.Int{big.NewInt(1), big.NewInt(2)}
fixedArrStrPack, err := abi.Pack("fixedArrStr", strin, arrin)
if err != nil {
t.Error(err)
}
// generate expected output
offset := make([]byte, 32)
offset[31] = 96
length := make([]byte, 32)
length[31] = byte(len(strin))
strvalue := common.RightPadBytes([]byte(strin), 32)
arrinvalue1 := common.LeftPadBytes(arrin[0].Bytes(), 32)
arrinvalue2 := common.LeftPadBytes(arrin[1].Bytes(), 32)
exp := append(offset, arrinvalue1...)
exp = append(exp, arrinvalue2...)
exp = append(exp, append(length, strvalue...)...)
// ignore first 4 bytes of the output. This is the function identifier
fixedArrStrPack = fixedArrStrPack[4:]
if !bytes.Equal(fixedArrStrPack, exp) {
t.Errorf("expected %x, got %x\n", exp, fixedArrStrPack)
}
// test byte array, fixed array uint256[2]
bytesin := []byte(strin)
arrin = [2]*big.Int{big.NewInt(1), big.NewInt(2)}
fixedArrBytesPack, err := abi.Pack("fixedArrBytes", bytesin, arrin)
if err != nil {
t.Error(err)
}
// generate expected output
offset = make([]byte, 32)
offset[31] = 96
length = make([]byte, 32)
length[31] = byte(len(strin))
strvalue = common.RightPadBytes([]byte(strin), 32)
arrinvalue1 = common.LeftPadBytes(arrin[0].Bytes(), 32)
arrinvalue2 = common.LeftPadBytes(arrin[1].Bytes(), 32)
exp = append(offset, arrinvalue1...)
exp = append(exp, arrinvalue2...)
exp = append(exp, append(length, strvalue...)...)
// ignore first 4 bytes of the output. This is the function identifier
fixedArrBytesPack = fixedArrBytesPack[4:]
if !bytes.Equal(fixedArrBytesPack, exp) {
t.Errorf("expected %x, got %x\n", exp, fixedArrBytesPack)
}
// test string, fixed array uint256[2], dynamic array uint256[]
strin = "hello world"
fixedarrin := [2]*big.Int{big.NewInt(1), big.NewInt(2)}
dynarrin := []*big.Int{big.NewInt(1), big.NewInt(2), big.NewInt(3)}
mixedArrStrPack, err := abi.Pack("mixedArrStr", strin, fixedarrin, dynarrin)
if err != nil {
t.Error(err)
}
// generate expected output
stroffset := make([]byte, 32)
stroffset[31] = 128
strlength := make([]byte, 32)
strlength[31] = byte(len(strin))
strvalue = common.RightPadBytes([]byte(strin), 32)
fixedarrinvalue1 := common.LeftPadBytes(fixedarrin[0].Bytes(), 32)
fixedarrinvalue2 := common.LeftPadBytes(fixedarrin[1].Bytes(), 32)
dynarroffset := make([]byte, 32)
dynarroffset[31] = byte(160 + ((len(strin)/32)+1)*32)
dynarrlength := make([]byte, 32)
dynarrlength[31] = byte(len(dynarrin))
dynarrinvalue1 := common.LeftPadBytes(dynarrin[0].Bytes(), 32)
dynarrinvalue2 := common.LeftPadBytes(dynarrin[1].Bytes(), 32)
dynarrinvalue3 := common.LeftPadBytes(dynarrin[2].Bytes(), 32)
exp = append(stroffset, fixedarrinvalue1...)
exp = append(exp, fixedarrinvalue2...)
exp = append(exp, dynarroffset...)
exp = append(exp, append(strlength, strvalue...)...)
dynarrarg := append(dynarrlength, dynarrinvalue1...)
dynarrarg = append(dynarrarg, dynarrinvalue2...)
dynarrarg = append(dynarrarg, dynarrinvalue3...)
exp = append(exp, dynarrarg...)
// ignore first 4 bytes of the output. This is the function identifier
mixedArrStrPack = mixedArrStrPack[4:]
if !bytes.Equal(mixedArrStrPack, exp) {
t.Errorf("expected %x, got %x\n", exp, mixedArrStrPack)
}
// test string, fixed array uint256[2], fixed array uint256[3]
strin = "hello world"
fixedarrin1 := [2]*big.Int{big.NewInt(1), big.NewInt(2)}
fixedarrin2 := [3]*big.Int{big.NewInt(1), big.NewInt(2), big.NewInt(3)}
doubleFixedArrStrPack, err := abi.Pack("doubleFixedArrStr", strin, fixedarrin1, fixedarrin2)
if err != nil {
t.Error(err)
}
// generate expected output
stroffset = make([]byte, 32)
stroffset[31] = 192
strlength = make([]byte, 32)
strlength[31] = byte(len(strin))
strvalue = common.RightPadBytes([]byte(strin), 32)
fixedarrin1value1 := common.LeftPadBytes(fixedarrin1[0].Bytes(), 32)
fixedarrin1value2 := common.LeftPadBytes(fixedarrin1[1].Bytes(), 32)
fixedarrin2value1 := common.LeftPadBytes(fixedarrin2[0].Bytes(), 32)
fixedarrin2value2 := common.LeftPadBytes(fixedarrin2[1].Bytes(), 32)
fixedarrin2value3 := common.LeftPadBytes(fixedarrin2[2].Bytes(), 32)
exp = append(stroffset, fixedarrin1value1...)
exp = append(exp, fixedarrin1value2...)
exp = append(exp, fixedarrin2value1...)
exp = append(exp, fixedarrin2value2...)
exp = append(exp, fixedarrin2value3...)
exp = append(exp, append(strlength, strvalue...)...)
// ignore first 4 bytes of the output. This is the function identifier
doubleFixedArrStrPack = doubleFixedArrStrPack[4:]
if !bytes.Equal(doubleFixedArrStrPack, exp) {
t.Errorf("expected %x, got %x\n", exp, doubleFixedArrStrPack)
}
// test string, fixed array uint256[2], dynamic array uint256[], fixed array uint256[3]
strin = "hello world"
fixedarrin1 = [2]*big.Int{big.NewInt(1), big.NewInt(2)}
dynarrin = []*big.Int{big.NewInt(1), big.NewInt(2)}
fixedarrin2 = [3]*big.Int{big.NewInt(1), big.NewInt(2), big.NewInt(3)}
multipleMixedArrStrPack, err := abi.Pack("multipleMixedArrStr", strin, fixedarrin1, dynarrin, fixedarrin2)
if err != nil {
t.Error(err)
}
// generate expected output
stroffset = make([]byte, 32)
stroffset[31] = 224
strlength = make([]byte, 32)
strlength[31] = byte(len(strin))
strvalue = common.RightPadBytes([]byte(strin), 32)
fixedarrin1value1 = common.LeftPadBytes(fixedarrin1[0].Bytes(), 32)
fixedarrin1value2 = common.LeftPadBytes(fixedarrin1[1].Bytes(), 32)
dynarroffset = U256(big.NewInt(int64(256 + ((len(strin)/32)+1)*32)))
dynarrlength = make([]byte, 32)
dynarrlength[31] = byte(len(dynarrin))
dynarrinvalue1 = common.LeftPadBytes(dynarrin[0].Bytes(), 32)
dynarrinvalue2 = common.LeftPadBytes(dynarrin[1].Bytes(), 32)
fixedarrin2value1 = common.LeftPadBytes(fixedarrin2[0].Bytes(), 32)
fixedarrin2value2 = common.LeftPadBytes(fixedarrin2[1].Bytes(), 32)
fixedarrin2value3 = common.LeftPadBytes(fixedarrin2[2].Bytes(), 32)
exp = append(stroffset, fixedarrin1value1...)
exp = append(exp, fixedarrin1value2...)
exp = append(exp, dynarroffset...)
exp = append(exp, fixedarrin2value1...)
exp = append(exp, fixedarrin2value2...)
exp = append(exp, fixedarrin2value3...)
exp = append(exp, append(strlength, strvalue...)...)
dynarrarg = append(dynarrlength, dynarrinvalue1...)
dynarrarg = append(dynarrarg, dynarrinvalue2...)
exp = append(exp, dynarrarg...)
// ignore first 4 bytes of the output. This is the function identifier
multipleMixedArrStrPack = multipleMixedArrStrPack[4:]
if !bytes.Equal(multipleMixedArrStrPack, exp) {
t.Errorf("expected %x, got %x\n", exp, multipleMixedArrStrPack)
}
}
func TestDefaultFunctionParsing(t *testing.T) {
const definition = `[{ "name" : "balance" }]`
abi, err := JSON(strings.NewReader(definition))
if err != nil {
t.Fatal(err)
}
if _, ok := abi.Methods["balance"]; !ok {
t.Error("expected 'balance' to be present")
}
}
func TestBareEvents(t *testing.T) {
const definition = `[
{ "type" : "event", "name" : "balance" },
{ "type" : "event", "name" : "anon", "anonymous" : true},
{ "type" : "event", "name" : "args", "inputs" : [{ "indexed":false, "name":"arg0", "type":"uint256" }, { "indexed":true, "name":"arg1", "type":"address" }] },
{ "type" : "event", "name" : "tuple", "inputs" : [{ "indexed":false, "name":"t", "type":"tuple", "components":[{"name":"a", "type":"uint256"}] }, { "indexed":true, "name":"arg1", "type":"address" }] }
]`
arg0, _ := NewType("uint256", nil)
arg1, _ := NewType("address", nil)
tuple, _ := NewType("tuple", []ArgumentMarshaling{{Name: "a", Type: "uint256"}})
expectedEvents := map[string]struct {
Anonymous bool
Args []Argument
}{
"balance": {false, nil},
"anon": {true, nil},
"args": {false, []Argument{
{Name: "arg0", Type: arg0, Indexed: false},
{Name: "arg1", Type: arg1, Indexed: true},
}},
"tuple": {false, []Argument{
{Name: "t", Type: tuple, Indexed: false},
{Name: "arg1", Type: arg1, Indexed: true},
}},
}
abi, err := JSON(strings.NewReader(definition))
if err != nil {
t.Fatal(err)
}
if len(abi.Events) != len(expectedEvents) {
t.Fatalf("invalid number of events after parsing, want %d, got %d", len(expectedEvents), len(abi.Events))
}
for name, exp := range expectedEvents {
got, ok := abi.Events[name]
if !ok {
t.Errorf("could not found event %s", name)
continue
}
if got.Anonymous != exp.Anonymous {
t.Errorf("invalid anonymous indication for event %s, want %v, got %v", name, exp.Anonymous, got.Anonymous)
}
if len(got.Inputs) != len(exp.Args) {
t.Errorf("invalid number of args, want %d, got %d", len(exp.Args), len(got.Inputs))
continue
}
for i, arg := range exp.Args {
if arg.Name != got.Inputs[i].Name {
t.Errorf("events[%s].Input[%d] has an invalid name, want %s, got %s", name, i, arg.Name, got.Inputs[i].Name)
}
if arg.Indexed != got.Inputs[i].Indexed {
t.Errorf("events[%s].Input[%d] has an invalid indexed indication, want %v, got %v", name, i, arg.Indexed, got.Inputs[i].Indexed)
}
if arg.Type.T != got.Inputs[i].Type.T {
t.Errorf("events[%s].Input[%d] has an invalid type, want %x, got %x", name, i, arg.Type.T, got.Inputs[i].Type.T)
}
}
}
}
// TestUnpackEvent is based on this contract:
// contract T {
// event received(address sender, uint amount, bytes memo);
// event receivedAddr(address sender);
// function receive(bytes memo) external payable {
// received(msg.sender, msg.value, memo);
// receivedAddr(msg.sender);
// }
// }
// When receive("X") is called with sender 0x00... and value 1, it produces this tx receipt:
// receipt{status=1 cgas=23949 bloom=00000000004000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000040200000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 logs=[log: b6818c8064f645cd82d99b59a1a267d6d61117ef [75fd880d39c1daf53b6547ab6cb59451fc6452d27caa90e5b6649dd8293b9eed] 000000000000000000000000376c47978271565f56deb45495afa69e59c16ab200000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000158 9ae378b6d4409eada347a5dc0c180f186cb62dc68fcc0f043425eb917335aa28 0 95d429d309bb9d753954195fe2d69bd140b4ae731b9b5b605c34323de162cf00 0]}
func TestUnpackEvent(t *testing.T) {
const abiJSON = `[{"constant":false,"inputs":[{"name":"memo","type":"bytes"}],"name":"receive","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"anonymous":false,"inputs":[{"indexed":false,"name":"sender","type":"address"},{"indexed":false,"name":"amount","type":"uint256"},{"indexed":false,"name":"memo","type":"bytes"}],"name":"received","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"sender","type":"address"}],"name":"receivedAddr","type":"event"}]`
abi, err := JSON(strings.NewReader(abiJSON))
if err != nil {
t.Fatal(err)
}
const hexdata = `000000000000000000000000376c47978271565f56deb45495afa69e59c16ab200000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000060000000000000000000000000000000000000000000000000000000000000000158`
data, err := hex.DecodeString(hexdata)
if err != nil {
t.Fatal(err)
}
if len(data)%32 == 0 {
t.Errorf("len(data) is %d, want a non-multiple of 32", len(data))
}
type ReceivedEvent struct {
Sender common.Address
Amount *big.Int
Memo []byte
}
var ev ReceivedEvent
err = abi.Unpack(&ev, "received", data)
if err != nil {
t.Error(err)
}
type ReceivedAddrEvent struct {
Sender common.Address
}
var receivedAddrEv ReceivedAddrEvent
err = abi.Unpack(&receivedAddrEv, "receivedAddr", data)
if err != nil {
t.Error(err)
}
}
func TestABI_MethodById(t *testing.T) {
const abiJSON = `[
{"type":"function","name":"receive","constant":false,"inputs":[{"name":"memo","type":"bytes"}],"outputs":[],"payable":true,"stateMutability":"payable"},
{"type":"event","name":"received","anonymous":false,"inputs":[{"indexed":false,"name":"sender","type":"address"},{"indexed":false,"name":"amount","type":"uint256"},{"indexed":false,"name":"memo","type":"bytes"}]},
{"type":"function","name":"fixedArrStr","constant":true,"inputs":[{"name":"str","type":"string"},{"name":"fixedArr","type":"uint256[2]"}]},
{"type":"function","name":"fixedArrBytes","constant":true,"inputs":[{"name":"str","type":"bytes"},{"name":"fixedArr","type":"uint256[2]"}]},
{"type":"function","name":"mixedArrStr","constant":true,"inputs":[{"name":"str","type":"string"},{"name":"fixedArr","type":"uint256[2]"},{"name":"dynArr","type":"uint256[]"}]},
{"type":"function","name":"doubleFixedArrStr","constant":true,"inputs":[{"name":"str","type":"string"},{"name":"fixedArr1","type":"uint256[2]"},{"name":"fixedArr2","type":"uint256[3]"}]},
{"type":"function","name":"multipleMixedArrStr","constant":true,"inputs":[{"name":"str","type":"string"},{"name":"fixedArr1","type":"uint256[2]"},{"name":"dynArr","type":"uint256[]"},{"name":"fixedArr2","type":"uint256[3]"}]},
{"type":"function","name":"balance","constant":true},
{"type":"function","name":"send","constant":false,"inputs":[{"name":"amount","type":"uint256"}]},
{"type":"function","name":"test","constant":false,"inputs":[{"name":"number","type":"uint32"}]},
{"type":"function","name":"string","constant":false,"inputs":[{"name":"inputs","type":"string"}]},
{"type":"function","name":"bool","constant":false,"inputs":[{"name":"inputs","type":"bool"}]},
{"type":"function","name":"address","constant":false,"inputs":[{"name":"inputs","type":"address"}]},
{"type":"function","name":"uint64[2]","constant":false,"inputs":[{"name":"inputs","type":"uint64[2]"}]},
{"type":"function","name":"uint64[]","constant":false,"inputs":[{"name":"inputs","type":"uint64[]"}]},
{"type":"function","name":"foo","constant":false,"inputs":[{"name":"inputs","type":"uint32"}]},
{"type":"function","name":"bar","constant":false,"inputs":[{"name":"inputs","type":"uint32"},{"name":"string","type":"uint16"}]},
{"type":"function","name":"_slice","constant":false,"inputs":[{"name":"inputs","type":"uint32[2]"}]},
{"type":"function","name":"__slice256","constant":false,"inputs":[{"name":"inputs","type":"uint256[2]"}]},
{"type":"function","name":"sliceAddress","constant":false,"inputs":[{"name":"inputs","type":"address[]"}]},
{"type":"function","name":"sliceMultiAddress","constant":false,"inputs":[{"name":"a","type":"address[]"},{"name":"b","type":"address[]"}]}
]
`
abi, err := JSON(strings.NewReader(abiJSON))
if err != nil {
t.Fatal(err)
}
for name, m := range abi.Methods {
a := fmt.Sprintf("%v", m)
m2, err := abi.MethodById(m.Id())
if err != nil {
t.Fatalf("Failed to look up ABI method: %v", err)
}
b := fmt.Sprintf("%v", m2)
if a != b {
t.Errorf("Method %v (id %v) not 'findable' by id in ABI", name, common.ToHex(m.Id()))
}
}
// Also test empty
if _, err := abi.MethodById([]byte{0x00}); err == nil {
t.Errorf("Expected error, too short to decode data")
}
if _, err := abi.MethodById([]byte{}); err == nil {
t.Errorf("Expected error, too short to decode data")
}
if _, err := abi.MethodById(nil); err == nil {
t.Errorf("Expected error, nil is short to decode data")
}
}
