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fix int and fixed bytes

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This commit is contained in:
Jeff Wentworth 2019-11-12 21:15:22 +09:00
parent d94234d5f9
commit 65364fbc96
2 changed files with 14 additions and 11 deletions
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11
accounts/abi/bind/topics.go
View file

@ -219,8 +219,7 @@ func parseTopicsIntoMap(out map[string]interface{}, fields abi.Arguments, topics
case abi.BoolTy:
out[arg.Name] = topics[0][common.HashLength-1] == 1
case abi.IntTy, abi.UintTy:
num := new(big.Int).SetBytes(topics[0][:])
out[arg.Name] = num
out[arg.Name] = abi.ReadInteger(arg.Type.T, arg.Type.Kind, topics[0].Bytes())
case abi.AddressTy:
var addr common.Address
copy(addr[:], topics[0][common.HashLength-common.AddressLength:])
@ -228,9 +227,11 @@ func parseTopicsIntoMap(out map[string]interface{}, fields abi.Arguments, topics
case abi.HashTy:
out[arg.Name] = topics[0]
case abi.FixedBytesTy:
array := reflect.New(arg.Type.Type).Elem()
reflect.Copy(array, reflect.ValueOf(topics[0][:arg.Type.Size]))
out[arg.Name] = array.Interface()
array, err := abi.ReadFixedBytes(arg.Type, topics[0].Bytes())
if err != nil {
return err
}
out[arg.Name] = array
case abi.StringTy, abi.BytesTy, abi.SliceTy, abi.ArrayTy:
// Array types (including strings and bytes) have their keccak256 hashes stored in the topic- not a hash
// whose bytes can be decoded to the actual value- so the best we can do is retrieve that hash

14
accounts/abi/unpack.go
View file

@ -26,16 +26,18 @@ import (
)
var (
// MaxUint256 is the maximum value that can be represented by a uint256
MaxUint256 = big.NewInt(0).Add(
big.NewInt(0).Exp(big.NewInt(2), big.NewInt(256), nil),
big.NewInt(-1))
// MaxInt256 is the maximum value that can be represented by a int256
MaxInt256 = big.NewInt(0).Add(
big.NewInt(0).Exp(big.NewInt(2), big.NewInt(255), nil),
big.NewInt(-1))
)
// reads the integer based on its kind
func readInteger(typ byte, kind reflect.Kind, b []byte) interface{} {
// ReadInteger reads the integer based on its kind and returns the appropriate value
func ReadInteger(typ byte, kind reflect.Kind, b []byte) interface{} {
switch kind {
case reflect.Uint8:
return b[len(b)-1]
@ -102,8 +104,8 @@ func readFunctionType(t Type, word []byte) (funcTy [24]byte, err error) {
return
}
// through reflection, creates a fixed array to be read from
func readFixedBytes(t Type, word []byte) (interface{}, error) {
// ReadFixedBytes uses reflection to create a fixed array to be read from
func ReadFixedBytes(t Type, word []byte) (interface{}, error) {
if t.T != FixedBytesTy {
return nil, fmt.Errorf("abi: invalid type in call to make fixed byte array")
}
@ -230,7 +232,7 @@ func toGoType(index int, t Type, output []byte) (interface{}, error) {
case StringTy: // variable arrays are written at the end of the return bytes
return string(output[begin : begin+length]), nil
case IntTy, UintTy:
return readInteger(t.T, t.Kind, returnOutput), nil
return ReadInteger(t.T, t.Kind, returnOutput), nil
case BoolTy:
return readBool(returnOutput)
case AddressTy:
@ -240,7 +242,7 @@ func toGoType(index int, t Type, output []byte) (interface{}, error) {
case BytesTy:
return output[begin : begin+length], nil
case FixedBytesTy:
return readFixedBytes(t, returnOutput)
return ReadFixedBytes(t, returnOutput)
case FunctionTy:
return readFunctionType(t, returnOutput)
default: