mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-07-27 15:16:43 +00:00
accounts/abi: reorganizing package and some notes and a quick correction of name.
Signed-off-by: RJ Catalano <rj@monax.io> get rid of some imports Signed-off-by: RJ Catalano <rj@monax.io>
This commit is contained in:
RJ Catalano
parent
061889d4ea
commit
a52e1b4495
3 changed files with 221 additions and 196 deletions
|
|
@ -17,11 +17,9 @@
|
|||
package abi
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"encoding/json"
|
||||
"fmt"
|
||||
"io"
|
||||
"math/big"
|
||||
"reflect"
|
||||
"strings"
|
||||
|
||||
|
|
@ -78,199 +76,6 @@ func (abi ABI) Pack(name string, args ...interface{}) ([]byte, error) {
|
|||
return append(method.Id(), arguments...), nil
|
||||
}
|
||||
|
||||
// toGoSliceType parses the input and casts it to the proper slice defined by the ABI
|
||||
// argument in T.
|
||||
func toGoSlice(i int, t Argument, output []byte) (interface{}, error) {
|
||||
index := i * 32
|
||||
// The slice must, at very least be large enough for the index+32 which is exactly the size required
|
||||
// for the [offset in output, size of offset].
|
||||
if index+32 > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go slice: insufficient size output %d require %d", len(output), index+32)
|
||||
}
|
||||
elem := t.Type.Elem
|
||||
|
||||
// first we need to create a slice of the type
|
||||
var refSlice reflect.Value
|
||||
switch elem.T {
|
||||
case IntTy, UintTy, BoolTy:
|
||||
// create a new reference slice matching the element type
|
||||
switch t.Type.Kind {
|
||||
case reflect.Bool:
|
||||
refSlice = reflect.ValueOf([]bool(nil))
|
||||
case reflect.Uint8:
|
||||
refSlice = reflect.ValueOf([]uint8(nil))
|
||||
case reflect.Uint16:
|
||||
refSlice = reflect.ValueOf([]uint16(nil))
|
||||
case reflect.Uint32:
|
||||
refSlice = reflect.ValueOf([]uint32(nil))
|
||||
case reflect.Uint64:
|
||||
refSlice = reflect.ValueOf([]uint64(nil))
|
||||
case reflect.Int8:
|
||||
refSlice = reflect.ValueOf([]int8(nil))
|
||||
case reflect.Int16:
|
||||
refSlice = reflect.ValueOf([]int16(nil))
|
||||
case reflect.Int32:
|
||||
refSlice = reflect.ValueOf([]int32(nil))
|
||||
case reflect.Int64:
|
||||
refSlice = reflect.ValueOf([]int64(nil))
|
||||
default:
|
||||
refSlice = reflect.ValueOf([]*big.Int(nil))
|
||||
}
|
||||
case AddressTy: // address must be of slice Address
|
||||
refSlice = reflect.ValueOf([]common.Address(nil))
|
||||
case HashTy: // hash must be of slice hash
|
||||
refSlice = reflect.ValueOf([]common.Hash(nil))
|
||||
case FixedBytesTy:
|
||||
refSlice = reflect.ValueOf([][]byte(nil))
|
||||
default: // no other types are supported
|
||||
return nil, fmt.Errorf("abi: unsupported slice type %v", elem.T)
|
||||
}
|
||||
|
||||
var slice []byte
|
||||
var size int
|
||||
var offset int
|
||||
if t.Type.IsSlice {
|
||||
// get the offset which determines the start of this array ...
|
||||
offset = int(binary.BigEndian.Uint64(output[index+24 : index+32]))
|
||||
if offset+32 > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go slice: offset %d would go over slice boundary (len=%d)", len(output), offset+32)
|
||||
}
|
||||
|
||||
slice = output[offset:]
|
||||
// ... starting with the size of the array in elements ...
|
||||
size = int(binary.BigEndian.Uint64(slice[24:32]))
|
||||
slice = slice[32:]
|
||||
// ... and make sure that we've at the very least the amount of bytes
|
||||
// available in the buffer.
|
||||
if size*32 > len(slice) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go slice: insufficient size output %d require %d", len(output), offset+32+size*32)
|
||||
}
|
||||
|
||||
// reslice to match the required size
|
||||
slice = slice[:size*32]
|
||||
} else if t.Type.IsArray {
|
||||
//get the number of elements in the array
|
||||
size = t.Type.SliceSize
|
||||
|
||||
//check to make sure array size matches up
|
||||
if index+32*size > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go array: offset %d would go over slice boundary (len=%d)", len(output), index+32*size)
|
||||
}
|
||||
//slice is there for a fixed amount of times
|
||||
slice = output[index : index+size*32]
|
||||
}
|
||||
|
||||
for i := 0; i < size; i++ {
|
||||
var (
|
||||
inter interface{} // interface type
|
||||
returnOutput = slice[i*32 : i*32+32] // the return output
|
||||
)
|
||||
// set inter to the correct type (cast)
|
||||
switch elem.T {
|
||||
case IntTy, UintTy:
|
||||
inter = readInteger(t.Type.Kind, returnOutput)
|
||||
case BoolTy:
|
||||
inter = !allZero(returnOutput)
|
||||
case AddressTy:
|
||||
inter = common.BytesToAddress(returnOutput)
|
||||
case HashTy:
|
||||
inter = common.BytesToHash(returnOutput)
|
||||
case FixedBytesTy:
|
||||
inter = returnOutput
|
||||
}
|
||||
// append the item to our reflect slice
|
||||
refSlice = reflect.Append(refSlice, reflect.ValueOf(inter))
|
||||
}
|
||||
|
||||
// return the interface
|
||||
return refSlice.Interface(), nil
|
||||
}
|
||||
|
||||
func readInteger(kind reflect.Kind, b []byte) interface{} {
|
||||
switch kind {
|
||||
case reflect.Uint8:
|
||||
return uint8(b[len(b)-1])
|
||||
case reflect.Uint16:
|
||||
return binary.BigEndian.Uint16(b[len(b)-2:])
|
||||
case reflect.Uint32:
|
||||
return binary.BigEndian.Uint32(b[len(b)-4:])
|
||||
case reflect.Uint64:
|
||||
return binary.BigEndian.Uint64(b[len(b)-8:])
|
||||
case reflect.Int8:
|
||||
return int8(b[len(b)-1])
|
||||
case reflect.Int16:
|
||||
return int16(binary.BigEndian.Uint16(b[len(b)-2:]))
|
||||
case reflect.Int32:
|
||||
return int32(binary.BigEndian.Uint32(b[len(b)-4:]))
|
||||
case reflect.Int64:
|
||||
return int64(binary.BigEndian.Uint64(b[len(b)-8:]))
|
||||
default:
|
||||
return new(big.Int).SetBytes(b)
|
||||
}
|
||||
}
|
||||
|
||||
func allZero(b []byte) bool {
|
||||
for _, byte := range b {
|
||||
if byte != 0 {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
// toGoType parses the input and casts it to the proper type defined by the ABI
|
||||
// argument in T.
|
||||
func toGoType(i int, t Argument, output []byte) (interface{}, error) {
|
||||
// we need to treat slices differently
|
||||
if (t.Type.IsSlice || t.Type.IsArray) && t.Type.T != BytesTy && t.Type.T != StringTy && t.Type.T != FixedBytesTy && t.Type.T != FunctionTy {
|
||||
return toGoSlice(i, t, output)
|
||||
}
|
||||
|
||||
index := i * 32
|
||||
if index+32 > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go type: length insufficient %d require %d", len(output), index+32)
|
||||
}
|
||||
|
||||
// Parse the given index output and check whether we need to read
|
||||
// a different offset and length based on the type (i.e. string, bytes)
|
||||
var returnOutput []byte
|
||||
switch t.Type.T {
|
||||
case StringTy, BytesTy: // variable arrays are written at the end of the return bytes
|
||||
// parse offset from which we should start reading
|
||||
offset := int(binary.BigEndian.Uint64(output[index+24 : index+32]))
|
||||
if offset+32 > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go type: length insufficient %d require %d", len(output), offset+32)
|
||||
}
|
||||
// parse the size up until we should be reading
|
||||
size := int(binary.BigEndian.Uint64(output[offset+24 : offset+32]))
|
||||
if offset+32+size > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go type: length insufficient %d require %d", len(output), offset+32+size)
|
||||
}
|
||||
|
||||
// get the bytes for this return value
|
||||
returnOutput = output[offset+32 : offset+32+size]
|
||||
default:
|
||||
returnOutput = output[index : index+32]
|
||||
}
|
||||
|
||||
// convert the bytes to whatever is specified by the ABI.
|
||||
switch t.Type.T {
|
||||
case IntTy, UintTy:
|
||||
return readInteger(t.Type.Kind, returnOutput), nil
|
||||
case BoolTy:
|
||||
return !allZero(returnOutput), nil
|
||||
case AddressTy:
|
||||
return common.BytesToAddress(returnOutput), nil
|
||||
case HashTy:
|
||||
return common.BytesToHash(returnOutput), nil
|
||||
case BytesTy, FixedBytesTy, FunctionTy:
|
||||
return returnOutput, nil
|
||||
case StringTy:
|
||||
return string(returnOutput), nil
|
||||
}
|
||||
return nil, fmt.Errorf("abi: unknown type %v", t.Type.T)
|
||||
}
|
||||
|
||||
// these variable are used to determine certain types during type assertion for
|
||||
// assignment.
|
||||
var (
|
||||
|
|
|
|||
|
|
@ -33,7 +33,7 @@ const (
|
|||
FixedBytesTy
|
||||
BytesTy
|
||||
HashTy
|
||||
FixedpointTy
|
||||
FixedPointTy
|
||||
FunctionTy
|
||||
)
|
||||
|
||||
|
|
|
|||
220
accounts/abi/unpacking.go
Normal file
220
accounts/abi/unpacking.go
Normal file
|
|
@ -0,0 +1,220 @@
|
|||
// 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 (
|
||||
"encoding/binary"
|
||||
"fmt"
|
||||
"math/big"
|
||||
"reflect"
|
||||
|
||||
"github.com/ethereum/go-ethereum/common"
|
||||
)
|
||||
|
||||
// toGoSliceType parses the input and casts it to the proper slice defined by the ABI
|
||||
// argument in T.
|
||||
func toGoSlice(i int, t Argument, output []byte) (interface{}, error) {
|
||||
index := i * 32
|
||||
// The slice must, at very least be large enough for the index+32 which is exactly the size required
|
||||
// for the [offset in output, size of offset].
|
||||
if index+32 > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go slice: insufficient size output %d require %d", len(output), index+32)
|
||||
}
|
||||
elem := t.Type.Elem
|
||||
|
||||
// first we need to create a slice of the type
|
||||
var refSlice reflect.Value
|
||||
switch elem.T {
|
||||
case IntTy, UintTy, BoolTy:
|
||||
// create a new reference slice matching the element type
|
||||
switch t.Type.Kind {
|
||||
case reflect.Bool:
|
||||
refSlice = reflect.ValueOf([]bool(nil))
|
||||
case reflect.Uint8:
|
||||
refSlice = reflect.ValueOf([]uint8(nil))
|
||||
case reflect.Uint16:
|
||||
refSlice = reflect.ValueOf([]uint16(nil))
|
||||
case reflect.Uint32:
|
||||
refSlice = reflect.ValueOf([]uint32(nil))
|
||||
case reflect.Uint64:
|
||||
refSlice = reflect.ValueOf([]uint64(nil))
|
||||
case reflect.Int8:
|
||||
refSlice = reflect.ValueOf([]int8(nil))
|
||||
case reflect.Int16:
|
||||
refSlice = reflect.ValueOf([]int16(nil))
|
||||
case reflect.Int32:
|
||||
refSlice = reflect.ValueOf([]int32(nil))
|
||||
case reflect.Int64:
|
||||
refSlice = reflect.ValueOf([]int64(nil))
|
||||
default:
|
||||
refSlice = reflect.ValueOf([]*big.Int(nil))
|
||||
}
|
||||
case AddressTy: // address must be of slice Address
|
||||
refSlice = reflect.ValueOf([]common.Address(nil))
|
||||
case HashTy: // hash must be of slice hash
|
||||
refSlice = reflect.ValueOf([]common.Hash(nil))
|
||||
case FixedBytesTy:
|
||||
refSlice = reflect.ValueOf([][]byte(nil))
|
||||
default: // no other types are supported
|
||||
return nil, fmt.Errorf("abi: unsupported slice type %v", elem.T)
|
||||
}
|
||||
|
||||
var slice []byte
|
||||
var size int
|
||||
var offset int
|
||||
if t.Type.IsSlice {
|
||||
// get the offset which determines the start of this array ...
|
||||
offset = int(binary.BigEndian.Uint64(output[index+24 : index+32]))
|
||||
if offset+32 > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go slice: offset %d would go over slice boundary (len=%d)", len(output), offset+32)
|
||||
}
|
||||
|
||||
slice = output[offset:]
|
||||
// ... starting with the size of the array in elements ...
|
||||
size = int(binary.BigEndian.Uint64(slice[24:32]))
|
||||
slice = slice[32:]
|
||||
// ... and make sure that we've at the very least the amount of bytes
|
||||
// available in the buffer.
|
||||
if size*32 > len(slice) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go slice: insufficient size output %d require %d", len(output), offset+32+size*32)
|
||||
}
|
||||
|
||||
// reslice to match the required size
|
||||
slice = slice[:size*32]
|
||||
} else if t.Type.IsArray {
|
||||
//get the number of elements in the array
|
||||
size = t.Type.SliceSize
|
||||
|
||||
//check to make sure array size matches up
|
||||
if index+32*size > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go array: offset %d would go over slice boundary (len=%d)", len(output), index+32*size)
|
||||
}
|
||||
//slice is there for a fixed amount of times
|
||||
slice = output[index : index+size*32]
|
||||
}
|
||||
|
||||
for i := 0; i < size; i++ {
|
||||
var (
|
||||
inter interface{} // interface type
|
||||
returnOutput = slice[i*32 : i*32+32] // the return output
|
||||
)
|
||||
// set inter to the correct type (cast)
|
||||
switch elem.T {
|
||||
case IntTy, UintTy:
|
||||
inter = readInteger(t.Type.Kind, returnOutput)
|
||||
case BoolTy:
|
||||
inter = !allZero(returnOutput)
|
||||
case AddressTy:
|
||||
inter = common.BytesToAddress(returnOutput)
|
||||
case HashTy:
|
||||
inter = common.BytesToHash(returnOutput)
|
||||
case FixedBytesTy:
|
||||
inter = returnOutput
|
||||
}
|
||||
// append the item to our reflect slice
|
||||
refSlice = reflect.Append(refSlice, reflect.ValueOf(inter))
|
||||
}
|
||||
|
||||
// return the interface
|
||||
return refSlice.Interface(), nil
|
||||
}
|
||||
|
||||
func readInteger(kind reflect.Kind, b []byte) interface{} {
|
||||
switch kind {
|
||||
case reflect.Uint8:
|
||||
return uint8(b[len(b)-1])
|
||||
case reflect.Uint16:
|
||||
return binary.BigEndian.Uint16(b[len(b)-2:])
|
||||
case reflect.Uint32:
|
||||
return binary.BigEndian.Uint32(b[len(b)-4:])
|
||||
case reflect.Uint64:
|
||||
return binary.BigEndian.Uint64(b[len(b)-8:])
|
||||
case reflect.Int8:
|
||||
return int8(b[len(b)-1])
|
||||
case reflect.Int16:
|
||||
return int16(binary.BigEndian.Uint16(b[len(b)-2:]))
|
||||
case reflect.Int32:
|
||||
return int32(binary.BigEndian.Uint32(b[len(b)-4:]))
|
||||
case reflect.Int64:
|
||||
return int64(binary.BigEndian.Uint64(b[len(b)-8:]))
|
||||
default:
|
||||
return new(big.Int).SetBytes(b)
|
||||
}
|
||||
}
|
||||
|
||||
// todo: this is inefficient for a bool, just look at the last cell, save yourself 32 iterations
|
||||
func allZero(b []byte) bool {
|
||||
for _, byte := range b {
|
||||
if byte != 0 {
|
||||
return false
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
// toGoType parses the input and casts it to the proper type defined by the ABI
|
||||
// argument in T.
|
||||
func toGoType(i int, t Argument, output []byte) (interface{}, error) {
|
||||
// we need to treat slices differently
|
||||
if (t.Type.IsSlice || t.Type.IsArray) && t.Type.T != BytesTy && t.Type.T != StringTy && t.Type.T != FixedBytesTy && t.Type.T != FunctionTy {
|
||||
return toGoSlice(i, t, output)
|
||||
}
|
||||
|
||||
index := i * 32
|
||||
if index+32 > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go type: length insufficient %d require %d", len(output), index+32)
|
||||
}
|
||||
|
||||
// Parse the given index output and check whether we need to read
|
||||
// a different offset and length based on the type (i.e. string, bytes)
|
||||
var returnOutput []byte
|
||||
switch t.Type.T {
|
||||
case StringTy, BytesTy: // variable arrays are written at the end of the return bytes
|
||||
// parse offset from which we should start reading
|
||||
offset := int(binary.BigEndian.Uint64(output[index+24 : index+32]))
|
||||
if offset+32 > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go type: length insufficient %d require %d", len(output), offset+32)
|
||||
}
|
||||
// parse the size up until we should be reading
|
||||
size := int(binary.BigEndian.Uint64(output[offset+24 : offset+32]))
|
||||
if offset+32+size > len(output) {
|
||||
return nil, fmt.Errorf("abi: cannot marshal in to go type: length insufficient %d require %d", len(output), offset+32+size)
|
||||
}
|
||||
|
||||
// get the bytes for this return value
|
||||
returnOutput = output[offset+32 : offset+32+size]
|
||||
default:
|
||||
returnOutput = output[index : index+32]
|
||||
}
|
||||
|
||||
// convert the bytes to whatever is specified by the ABI.
|
||||
switch t.Type.T {
|
||||
case IntTy, UintTy:
|
||||
return readInteger(t.Type.Kind, returnOutput), nil
|
||||
case BoolTy:
|
||||
return !allZero(returnOutput), nil
|
||||
case AddressTy:
|
||||
return common.BytesToAddress(returnOutput), nil
|
||||
case HashTy:
|
||||
return common.BytesToHash(returnOutput), nil
|
||||
case BytesTy, FixedBytesTy, FunctionTy:
|
||||
return returnOutput, nil
|
||||
case StringTy:
|
||||
return string(returnOutput), nil
|
||||
}
|
||||
return nil, fmt.Errorf("abi: unknown type %v", t.Type.T)
|
||||
}
|
||||
Loading…
Reference in a new issue