forked from scroll-tech/go-ethereum
/
state_account_marshalling.go
107 lines (85 loc) · 2.96 KB
/
state_account_marshalling.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
// Copyright 2021 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 types
import (
"encoding/binary"
"errors"
"math/big"
"github.com/iden3/go-iden3-crypto/utils"
zkt "github.com/scroll-tech/zktrie/types"
"github.com/chainupcloud/scroll-geth/common"
)
var (
ErrInvalidLength = errors.New("StateAccount: invalid input length")
)
// MarshalFields marshalls a StateAccount into a sequence of bytes. The bytes scheme is:
// [0:32] (bytes in big-endian)
//
// [0:16] Reserved with all 0
// [16:24] CodeSize, uint64 in big-endian
// [24:32] Nonce, uint64 in big-endian
//
// [32:64] Balance
// [64:96] StorageRoot
// [96:128] KeccakCodeHash
// [128:160] PoseidonCodehash
// (total 160 bytes)
func (s *StateAccount) MarshalFields() ([]zkt.Byte32, uint32) {
fields := make([]zkt.Byte32, 5)
if s.Balance == nil {
panic("StateAccount balance nil")
}
if !utils.CheckBigIntInField(s.Balance) {
panic("StateAccount balance overflow")
}
if !utils.CheckBigIntInField(s.Root.Big()) {
panic("StateAccount root overflow")
}
if !utils.CheckBigIntInField(new(big.Int).SetBytes(s.PoseidonCodeHash)) {
panic("StateAccount poseidonCodeHash overflow")
}
binary.BigEndian.PutUint64(fields[0][16:], s.CodeSize)
binary.BigEndian.PutUint64(fields[0][24:], s.Nonce)
s.Balance.FillBytes(fields[1][:])
copy(fields[2][:], s.Root.Bytes())
copy(fields[3][:], s.KeccakCodeHash)
copy(fields[4][:], s.PoseidonCodeHash)
// The returned flag shows which items cannot be encoded as field elements.
// KeccakCodeHash can be larger than the field size so we set the 3rd (LSB) bit to 1.
//
// +---+---+---+---+---+
// | 0 | 1 | 2 | 3 | 4 |
// +---+---+---+---+---+
// 0 0 0 1 0
flag := uint32(8)
return fields, flag
}
func UnmarshalStateAccount(bytes []byte) (*StateAccount, error) {
if len(bytes) != 160 {
return nil, ErrInvalidLength
}
acc := new(StateAccount)
acc.CodeSize = binary.BigEndian.Uint64(bytes[16:24])
acc.Nonce = binary.BigEndian.Uint64(bytes[24:32])
acc.Balance = new(big.Int).SetBytes(bytes[32:64])
acc.Root = common.Hash{}
acc.Root.SetBytes(bytes[64:96])
acc.KeccakCodeHash = make([]byte, 32)
copy(acc.KeccakCodeHash, bytes[96:128])
acc.PoseidonCodeHash = make([]byte, 32)
copy(acc.PoseidonCodeHash, bytes[128:160])
return acc, nil
}