-
Notifications
You must be signed in to change notification settings - Fork 20.2k
/
tx_blob.go
244 lines (222 loc) · 7.18 KB
/
tx_blob.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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
// Copyright 2023 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 (
"bytes"
"crypto/sha256"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto/kzg4844"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/holiman/uint256"
)
// BlobTx represents an EIP-4844 transaction.
type BlobTx struct {
ChainID *uint256.Int
Nonce uint64
GasTipCap *uint256.Int // a.k.a. maxPriorityFeePerGas
GasFeeCap *uint256.Int // a.k.a. maxFeePerGas
Gas uint64
To common.Address
Value *uint256.Int
Data []byte
AccessList AccessList
BlobFeeCap *uint256.Int // a.k.a. maxFeePerBlobGas
BlobHashes []common.Hash
// A blob transaction can optionally contain blobs. This field must be set when BlobTx
// is used to create a transaction for signing.
Sidecar *BlobTxSidecar `rlp:"-"`
// Signature values
V *uint256.Int `json:"v" gencodec:"required"`
R *uint256.Int `json:"r" gencodec:"required"`
S *uint256.Int `json:"s" gencodec:"required"`
}
// BlobTxSidecar contains the blobs of a blob transaction.
type BlobTxSidecar struct {
Blobs []kzg4844.Blob // Blobs needed by the blob pool
Commitments []kzg4844.Commitment // Commitments needed by the blob pool
Proofs []kzg4844.Proof // Proofs needed by the blob pool
}
// BlobHashes computes the blob hashes of the given blobs.
func (sc *BlobTxSidecar) BlobHashes() []common.Hash {
hasher := sha256.New()
h := make([]common.Hash, len(sc.Commitments))
for i := range sc.Blobs {
h[i] = kzg4844.CalcBlobHashV1(hasher, &sc.Commitments[i])
}
return h
}
// encodedSize computes the RLP size of the sidecar elements. This does NOT return the
// encoded size of the BlobTxSidecar, it's just a helper for tx.Size().
func (sc *BlobTxSidecar) encodedSize() uint64 {
var blobs, commitments, proofs uint64
for i := range sc.Blobs {
blobs += rlp.BytesSize(sc.Blobs[i][:])
}
for i := range sc.Commitments {
commitments += rlp.BytesSize(sc.Commitments[i][:])
}
for i := range sc.Proofs {
proofs += rlp.BytesSize(sc.Proofs[i][:])
}
return rlp.ListSize(blobs) + rlp.ListSize(commitments) + rlp.ListSize(proofs)
}
// blobTxWithBlobs is used for encoding of transactions when blobs are present.
type blobTxWithBlobs struct {
BlobTx *BlobTx
Blobs []kzg4844.Blob
Commitments []kzg4844.Commitment
Proofs []kzg4844.Proof
}
// copy creates a deep copy of the transaction data and initializes all fields.
func (tx *BlobTx) copy() TxData {
cpy := &BlobTx{
Nonce: tx.Nonce,
To: tx.To,
Data: common.CopyBytes(tx.Data),
Gas: tx.Gas,
// These are copied below.
AccessList: make(AccessList, len(tx.AccessList)),
BlobHashes: make([]common.Hash, len(tx.BlobHashes)),
Value: new(uint256.Int),
ChainID: new(uint256.Int),
GasTipCap: new(uint256.Int),
GasFeeCap: new(uint256.Int),
BlobFeeCap: new(uint256.Int),
V: new(uint256.Int),
R: new(uint256.Int),
S: new(uint256.Int),
}
copy(cpy.AccessList, tx.AccessList)
copy(cpy.BlobHashes, tx.BlobHashes)
if tx.Value != nil {
cpy.Value.Set(tx.Value)
}
if tx.ChainID != nil {
cpy.ChainID.Set(tx.ChainID)
}
if tx.GasTipCap != nil {
cpy.GasTipCap.Set(tx.GasTipCap)
}
if tx.GasFeeCap != nil {
cpy.GasFeeCap.Set(tx.GasFeeCap)
}
if tx.BlobFeeCap != nil {
cpy.BlobFeeCap.Set(tx.BlobFeeCap)
}
if tx.V != nil {
cpy.V.Set(tx.V)
}
if tx.R != nil {
cpy.R.Set(tx.R)
}
if tx.S != nil {
cpy.S.Set(tx.S)
}
if tx.Sidecar != nil {
cpy.Sidecar = &BlobTxSidecar{
Blobs: append([]kzg4844.Blob(nil), tx.Sidecar.Blobs...),
Commitments: append([]kzg4844.Commitment(nil), tx.Sidecar.Commitments...),
Proofs: append([]kzg4844.Proof(nil), tx.Sidecar.Proofs...),
}
}
return cpy
}
// accessors for innerTx.
func (tx *BlobTx) txType() byte { return BlobTxType }
func (tx *BlobTx) chainID() *big.Int { return tx.ChainID.ToBig() }
func (tx *BlobTx) accessList() AccessList { return tx.AccessList }
func (tx *BlobTx) data() []byte { return tx.Data }
func (tx *BlobTx) gas() uint64 { return tx.Gas }
func (tx *BlobTx) gasFeeCap() *big.Int { return tx.GasFeeCap.ToBig() }
func (tx *BlobTx) gasTipCap() *big.Int { return tx.GasTipCap.ToBig() }
func (tx *BlobTx) gasPrice() *big.Int { return tx.GasFeeCap.ToBig() }
func (tx *BlobTx) value() *big.Int { return tx.Value.ToBig() }
func (tx *BlobTx) nonce() uint64 { return tx.Nonce }
func (tx *BlobTx) to() *common.Address { tmp := tx.To; return &tmp }
func (tx *BlobTx) blobGas() uint64 { return params.BlobTxBlobGasPerBlob * uint64(len(tx.BlobHashes)) }
func (tx *BlobTx) effectiveGasPrice(dst *big.Int, baseFee *big.Int) *big.Int {
if baseFee == nil {
return dst.Set(tx.GasFeeCap.ToBig())
}
tip := dst.Sub(tx.GasFeeCap.ToBig(), baseFee)
if tip.Cmp(tx.GasTipCap.ToBig()) > 0 {
tip.Set(tx.GasTipCap.ToBig())
}
return tip.Add(tip, baseFee)
}
func (tx *BlobTx) rawSignatureValues() (v, r, s *big.Int) {
return tx.V.ToBig(), tx.R.ToBig(), tx.S.ToBig()
}
func (tx *BlobTx) setSignatureValues(chainID, v, r, s *big.Int) {
tx.ChainID.SetFromBig(chainID)
tx.V.SetFromBig(v)
tx.R.SetFromBig(r)
tx.S.SetFromBig(s)
}
func (tx *BlobTx) withoutSidecar() *BlobTx {
cpy := *tx
cpy.Sidecar = nil
return &cpy
}
func (tx *BlobTx) withSidecar(sideCar *BlobTxSidecar) *BlobTx {
cpy := *tx
cpy.Sidecar = sideCar
return &cpy
}
func (tx *BlobTx) encode(b *bytes.Buffer) error {
if tx.Sidecar == nil {
return rlp.Encode(b, tx)
}
inner := &blobTxWithBlobs{
BlobTx: tx,
Blobs: tx.Sidecar.Blobs,
Commitments: tx.Sidecar.Commitments,
Proofs: tx.Sidecar.Proofs,
}
return rlp.Encode(b, inner)
}
func (tx *BlobTx) decode(input []byte) error {
// Here we need to support two formats: the network protocol encoding of the tx (with
// blobs) or the canonical encoding without blobs.
//
// The two encodings can be distinguished by checking whether the first element of the
// input list is itself a list.
outerList, _, err := rlp.SplitList(input)
if err != nil {
return err
}
firstElemKind, _, _, err := rlp.Split(outerList)
if err != nil {
return err
}
if firstElemKind != rlp.List {
return rlp.DecodeBytes(input, tx)
}
// It's a tx with blobs.
var inner blobTxWithBlobs
if err := rlp.DecodeBytes(input, &inner); err != nil {
return err
}
*tx = *inner.BlobTx
tx.Sidecar = &BlobTxSidecar{
Blobs: inner.Blobs,
Commitments: inner.Commitments,
Proofs: inner.Proofs,
}
return nil
}