You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
3.0 KiB
85 lines
3.0 KiB
// Copyright 2016 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 (
|
|
"errors"
|
|
"fmt"
|
|
"math/big"
|
|
"reflect"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/harmony-one/harmony/common/math"
|
|
)
|
|
|
|
// packBytesSlice packs the given bytes as [L, V] as the canonical representation
|
|
// bytes slice.
|
|
func packBytesSlice(bytes []byte, l int) []byte {
|
|
len := packNum(reflect.ValueOf(l))
|
|
return append(len, common.RightPadBytes(bytes, (l+31)/32*32)...)
|
|
}
|
|
|
|
// packElement packs the given reflect value according to the abi specification in
|
|
// t.
|
|
func packElement(t Type, reflectValue reflect.Value) ([]byte, error) {
|
|
switch t.T {
|
|
case IntTy, UintTy:
|
|
return packNum(reflectValue), nil
|
|
case StringTy:
|
|
return packBytesSlice([]byte(reflectValue.String()), reflectValue.Len()), nil
|
|
case AddressTy:
|
|
if reflectValue.Kind() == reflect.Array {
|
|
reflectValue = mustArrayToByteSlice(reflectValue)
|
|
}
|
|
|
|
return common.LeftPadBytes(reflectValue.Bytes(), 32), nil
|
|
case BoolTy:
|
|
if reflectValue.Bool() {
|
|
return math.PaddedBigBytes(common.Big1, 32), nil
|
|
}
|
|
return math.PaddedBigBytes(common.Big0, 32), nil
|
|
case BytesTy:
|
|
if reflectValue.Kind() == reflect.Array {
|
|
reflectValue = mustArrayToByteSlice(reflectValue)
|
|
}
|
|
if reflectValue.Type() != reflect.TypeOf([]byte{}) {
|
|
return []byte{}, errors.New("Bytes type is neither slice nor array")
|
|
}
|
|
return packBytesSlice(reflectValue.Bytes(), reflectValue.Len()), nil
|
|
case FixedBytesTy, FunctionTy:
|
|
if reflectValue.Kind() == reflect.Array {
|
|
reflectValue = mustArrayToByteSlice(reflectValue)
|
|
}
|
|
return common.RightPadBytes(reflectValue.Bytes(), 32), nil
|
|
default:
|
|
return []byte{}, fmt.Errorf("Could not pack element, unknown type: %v", t.T)
|
|
}
|
|
}
|
|
|
|
// packNum packs the given number (using the reflect value) and will cast it to appropriate number representation.
|
|
func packNum(value reflect.Value) []byte {
|
|
switch kind := value.Kind(); kind {
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
|
return math.U256Bytes(new(big.Int).SetUint64(value.Uint()))
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
return math.U256Bytes(big.NewInt(value.Int()))
|
|
case reflect.Ptr:
|
|
return math.U256Bytes(new(big.Int).Set(value.Interface().(*big.Int)))
|
|
default:
|
|
panic("abi: fatal error")
|
|
}
|
|
}
|
|
|