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fix parseTopics() and add tests

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This commit is contained in:
Jeff Wentworth 2019-11-12 20:41:41 +09:00
parent dac98bc89d
commit dc7cd7e4b5
3 changed files with 55 additions and 4 deletions
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8
accounts/abi/bind/topics.go
View file

@ -135,6 +135,7 @@ func parseTopics(out interface{}, fields abi.Arguments, topics []common.Hash) er
case reflect.Int8:
num := new(big.Int).SetBytes(topics[0][:])
field.Set(reflect.ValueOf(int8(num.Int64())))
fmt.Printf("parseTopics: num '%v', topics[0] '%v', field '%v'\n", num, topics[0], field)
case reflect.Int16:
num := new(big.Int).SetBytes(topics[0][:])
@ -178,6 +179,13 @@ func parseTopics(out interface{}, fields abi.Arguments, topics []common.Hash) er
case reflectBigInt:
num := new(big.Int).SetBytes(topics[0][:])
if arg.Type.T == abi.IntTy {
if num.Cmp(abi.MaxInt256) > 0 {
num.Add(abi.MaxUint256, big.NewInt(0).Neg(num))
num.Add(num, big.NewInt(1))
num.Neg(num)
}
}
field.Set(reflect.ValueOf(num))
default:

43
accounts/abi/bind/topics_test.go
View file

@ -17,6 +17,7 @@
package bind
import (
"math/big"
"reflect"
"testing"
@ -59,7 +60,15 @@ func TestParseTopics(t *testing.T) {
type bytesStruct struct {
StaticBytes [5]byte
}
type int8Struct struct {
Int8Value int8
}
type int256Struct struct {
Int256Value *big.Int
}
bytesType, _ := abi.NewType("bytes5", "", nil)
int8Type, _ := abi.NewType("int8", "", nil)
int256Type, _ := abi.NewType("int256", "", nil)
type args struct {
createObj func() interface{}
resultObj func() interface{}
@ -87,6 +96,40 @@ func TestParseTopics(t *testing.T) {
},
wantErr: false,
},
{
name: "int8 with negative value",
args: args{
createObj: func() interface{} { return &int8Struct{} },
resultObj: func() interface{} { return &int8Struct{Int8Value: -1} },
fields: abi.Arguments{abi.Argument{
Name: "int8Value",
Type: int8Type,
Indexed: true,
}},
topics: []common.Hash{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
},
wantErr: false,
},
{
name: "int256 with negative value",
args: args{
createObj: func() interface{} { return &int256Struct{} },
resultObj: func() interface{} { return &int256Struct{Int256Value: big.NewInt(-1)} },
fields: abi.Arguments{abi.Argument{
Name: "int256Value",
Type: int256Type,
Indexed: true,
}},
topics: []common.Hash{
{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
},
},
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {

8
accounts/abi/unpack.go
View file

@ -26,10 +26,10 @@ import (
)
var (
maxUint256 = big.NewInt(0).Add(
MaxUint256 = big.NewInt(0).Add(
big.NewInt(0).Exp(big.NewInt(2), big.NewInt(256), nil),
big.NewInt(-1))
maxInt256 = big.NewInt(0).Add(
MaxInt256 = big.NewInt(0).Add(
big.NewInt(0).Exp(big.NewInt(2), big.NewInt(255), nil),
big.NewInt(-1))
)
@ -62,8 +62,8 @@ func readInteger(typ byte, kind reflect.Kind, b []byte) interface{} {
return ret
}
if ret.Cmp(maxInt256) > 0 {
ret.Add(maxUint256, big.NewInt(0).Neg(ret))
if ret.Cmp(MaxInt256) > 0 {
ret.Add(MaxUint256, big.NewInt(0).Neg(ret))
ret.Add(ret, big.NewInt(1))
ret.Neg(ret)
}