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eip1559Transaction.ts
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eip1559Transaction.ts
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/*
This file is part of web3.js.
web3.js 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.
web3.js 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 web3.js. If not, see <http://www.gnu.org/licenses/>.
*/
import { keccak256 } from 'ethereum-cryptography/keccak.js';
import { validateNoLeadingZeroes } from 'web3-validator';
import { RLP } from '@ethereumjs/rlp';
import { bytesToHex, hexToBytes, uint8ArrayConcat, uint8ArrayEquals } from 'web3-utils';
import { MAX_INTEGER } from './constants.js';
import { BaseTransaction } from './baseTransaction.js';
import {
getAccessListData,
getAccessListJSON,
getDataFeeEIP2930,
verifyAccessList,
} from './utils.js';
import {
bigIntToHex,
toUint8Array,
ecrecover,
uint8ArrayToBigInt,
bigIntToUnpaddedUint8Array,
} from '../common/utils.js';
import type {
AccessList,
AccessListUint8Array,
FeeMarketEIP1559TxData,
FeeMarketEIP1559ValuesArray,
JsonTx,
TxOptions,
} from './types.js';
import type { Common } from '../common/common.js';
const TRANSACTION_TYPE = 2;
const TRANSACTION_TYPE_UINT8ARRAY = hexToBytes(TRANSACTION_TYPE.toString(16).padStart(2, '0'));
/**
* Typed transaction with a new gas fee market mechanism
*
* - TransactionType: 2
* - EIP: [EIP-1559](https://eips.ethereum.org/EIPS/eip-1559)
*/
// eslint-disable-next-line no-use-before-define
export class FeeMarketEIP1559Transaction extends BaseTransaction<FeeMarketEIP1559Transaction> {
public readonly chainId: bigint;
public readonly accessList: AccessListUint8Array;
public readonly AccessListJSON: AccessList;
public readonly maxPriorityFeePerGas: bigint;
public readonly maxFeePerGas: bigint;
public readonly common: Common;
/**
* The default HF if the tx type is active on that HF
* or the first greater HF where the tx is active.
*
* @hidden
*/
protected DEFAULT_HARDFORK = 'london';
/**
* Instantiate a transaction from a data dictionary.
*
* Format: { chainId, nonce, maxPriorityFeePerGas, maxFeePerGas, gasLimit, to, value, data,
* accessList, v, r, s }
*
* Notes:
* - `chainId` will be set automatically if not provided
* - All parameters are optional and have some basic default values
*/
public static fromTxData(txData: FeeMarketEIP1559TxData, opts: TxOptions = {}) {
return new FeeMarketEIP1559Transaction(txData, opts);
}
/**
* Instantiate a transaction from the serialized tx.
*
* Format: `0x02 || rlp([chainId, nonce, maxPriorityFeePerGas, maxFeePerGas, gasLimit, to, value, data,
* accessList, signatureYParity, signatureR, signatureS])`
*/
public static fromSerializedTx(serialized: Uint8Array, opts: TxOptions = {}) {
if (!uint8ArrayEquals(serialized.subarray(0, 1), TRANSACTION_TYPE_UINT8ARRAY)) {
throw new Error(
`Invalid serialized tx input: not an EIP-1559 transaction (wrong tx type, expected: ${TRANSACTION_TYPE}, received: ${bytesToHex(
serialized.subarray(0, 1),
)}`,
);
}
const values = RLP.decode(serialized.subarray(1));
if (!Array.isArray(values)) {
throw new Error('Invalid serialized tx input: must be array');
}
// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
return FeeMarketEIP1559Transaction.fromValuesArray(values as any, opts);
}
/**
* Create a transaction from a values array.
*
* Format: `[chainId, nonce, maxPriorityFeePerGas, maxFeePerGas, gasLimit, to, value, data,
* accessList, signatureYParity, signatureR, signatureS]`
*/
public static fromValuesArray(values: FeeMarketEIP1559ValuesArray, opts: TxOptions = {}) {
if (values.length !== 9 && values.length !== 12) {
throw new Error(
'Invalid EIP-1559 transaction. Only expecting 9 values (for unsigned tx) or 12 values (for signed tx).',
);
}
const [
chainId,
nonce,
maxPriorityFeePerGas,
maxFeePerGas,
gasLimit,
to,
value,
data,
accessList,
v,
r,
s,
] = values;
this._validateNotArray({ chainId, v });
validateNoLeadingZeroes({
nonce,
maxPriorityFeePerGas,
maxFeePerGas,
gasLimit,
value,
v,
r,
s,
});
return new FeeMarketEIP1559Transaction(
{
chainId: uint8ArrayToBigInt(chainId),
nonce,
maxPriorityFeePerGas,
maxFeePerGas,
gasLimit,
to,
value,
data,
accessList: accessList ?? [],
v: v !== undefined ? uint8ArrayToBigInt(v) : undefined, // EIP2930 supports v's with value 0 (empty Uint8Array)
r,
s,
},
opts,
);
}
/**
* This constructor takes the values, validates them, assigns them and freezes the object.
*
* It is not recommended to use this constructor directly. Instead use
* the static factory methods to assist in creating a Transaction object from
* varying data types.
*/
public constructor(txData: FeeMarketEIP1559TxData, opts: TxOptions = {}) {
super({ ...txData, type: TRANSACTION_TYPE }, opts);
const { chainId, accessList, maxFeePerGas, maxPriorityFeePerGas } = txData;
this.common = this._getCommon(opts.common, chainId);
this.chainId = this.common.chainId();
if (!this.common.isActivatedEIP(1559)) {
throw new Error('EIP-1559 not enabled on Common');
}
this.activeCapabilities = this.activeCapabilities.concat([1559, 2718, 2930]);
// Populate the access list fields
const accessListData = getAccessListData(accessList ?? []);
this.accessList = accessListData.accessList;
this.AccessListJSON = accessListData.AccessListJSON;
// Verify the access list format.
verifyAccessList(this.accessList);
this.maxFeePerGas = uint8ArrayToBigInt(
toUint8Array(maxFeePerGas === '' ? '0x' : maxFeePerGas),
);
this.maxPriorityFeePerGas = uint8ArrayToBigInt(
toUint8Array(maxPriorityFeePerGas === '' ? '0x' : maxPriorityFeePerGas),
);
this._validateCannotExceedMaxInteger({
maxFeePerGas: this.maxFeePerGas,
maxPriorityFeePerGas: this.maxPriorityFeePerGas,
});
BaseTransaction._validateNotArray(txData);
if (this.gasLimit * this.maxFeePerGas > MAX_INTEGER) {
const msg = this._errorMsg(
'gasLimit * maxFeePerGas cannot exceed MAX_INTEGER (2^256-1)',
);
throw new Error(msg);
}
if (this.maxFeePerGas < this.maxPriorityFeePerGas) {
const msg = this._errorMsg(
'maxFeePerGas cannot be less than maxPriorityFeePerGas (The total must be the larger of the two)',
);
throw new Error(msg);
}
this._validateYParity();
this._validateHighS();
const freeze = opts?.freeze ?? true;
if (freeze) {
Object.freeze(this);
}
}
/**
* The amount of gas paid for the data in this tx
*/
public getDataFee(): bigint {
if (this.cache.dataFee && this.cache.dataFee.hardfork === this.common.hardfork()) {
return this.cache.dataFee.value;
}
let cost = super.getDataFee();
cost += BigInt(getDataFeeEIP2930(this.accessList, this.common));
if (Object.isFrozen(this)) {
this.cache.dataFee = {
value: cost,
hardfork: this.common.hardfork(),
};
}
return cost;
}
/**
* The up front amount that an account must have for this transaction to be valid
* @param baseFee The base fee of the block (will be set to 0 if not provided)
*/
public getUpfrontCost(baseFee = BigInt(0)): bigint {
const prio = this.maxPriorityFeePerGas;
const maxBase = this.maxFeePerGas - baseFee;
const inclusionFeePerGas = prio < maxBase ? prio : maxBase;
const gasPrice = inclusionFeePerGas + baseFee;
return this.gasLimit * gasPrice + this.value;
}
/**
* Returns a Uint8Array Array of the raw Uint8Arrays of the EIP-1559 transaction, in order.
*
* Format: `[chainId, nonce, maxPriorityFeePerGas, maxFeePerGas, gasLimit, to, value, data,
* accessList, signatureYParity, signatureR, signatureS]`
*
* Use {@link FeeMarketEIP1559Transaction.serialize} to add a transaction to a block
* with {@link Block.fromValuesArray}.
*
* For an unsigned tx this method uses the empty Uint8Array values for the
* signature parameters `v`, `r` and `s` for encoding. For an EIP-155 compliant
* representation for external signing use {@link FeeMarketEIP1559Transaction.getMessageToSign}.
*/
public raw(): FeeMarketEIP1559ValuesArray {
return [
bigIntToUnpaddedUint8Array(this.chainId),
bigIntToUnpaddedUint8Array(this.nonce),
bigIntToUnpaddedUint8Array(this.maxPriorityFeePerGas),
bigIntToUnpaddedUint8Array(this.maxFeePerGas),
bigIntToUnpaddedUint8Array(this.gasLimit),
this.to !== undefined ? this.to.buf : Uint8Array.from([]),
bigIntToUnpaddedUint8Array(this.value),
this.data,
this.accessList,
this.v !== undefined ? bigIntToUnpaddedUint8Array(this.v) : Uint8Array.from([]),
this.r !== undefined ? bigIntToUnpaddedUint8Array(this.r) : Uint8Array.from([]),
this.s !== undefined ? bigIntToUnpaddedUint8Array(this.s) : Uint8Array.from([]),
];
}
/**
* Returns the serialized encoding of the EIP-1559 transaction.
*
* Format: `0x02 || rlp([chainId, nonce, maxPriorityFeePerGas, maxFeePerGas, gasLimit, to, value, data,
* accessList, signatureYParity, signatureR, signatureS])`
*
* Note that in contrast to the legacy tx serialization format this is not
* valid RLP any more due to the raw tx type preceding and concatenated to
* the RLP encoding of the values.
*/
public serialize(): Uint8Array {
const base = this.raw();
return uint8ArrayConcat(TRANSACTION_TYPE_UINT8ARRAY, RLP.encode(base));
}
/**
* Returns the serialized unsigned tx (hashed or raw), which can be used
* to sign the transaction (e.g. for sending to a hardware wallet).
*
* Note: in contrast to the legacy tx the raw message format is already
* serialized and doesn't need to be RLP encoded any more.
*
* ```javascript
* const serializedMessage = tx.getMessageToSign(false) // use this for the HW wallet input
* ```
*
* @param hashMessage - Return hashed message if set to true (default: true)
*/
public getMessageToSign(hashMessage = true): Uint8Array {
const base = this.raw().slice(0, 9);
const message = uint8ArrayConcat(TRANSACTION_TYPE_UINT8ARRAY, RLP.encode(base));
if (hashMessage) {
return keccak256(message);
}
return message;
}
/**
* Computes a sha3-256 hash of the serialized tx.
*
* This method can only be used for signed txs (it throws otherwise).
* Use {@link FeeMarketEIP1559Transaction.getMessageToSign} to get a tx hash for the purpose of signing.
*/
public hash(): Uint8Array {
if (!this.isSigned()) {
const msg = this._errorMsg('Cannot call hash method if transaction is not signed');
throw new Error(msg);
}
if (Object.isFrozen(this)) {
if (!this.cache.hash) {
this.cache.hash = keccak256(this.serialize());
}
return this.cache.hash;
}
return keccak256(this.serialize());
}
/**
* Computes a sha3-256 hash which can be used to verify the signature
*/
public getMessageToVerifySignature(): Uint8Array {
return this.getMessageToSign();
}
/**
* Returns the public key of the sender
*/
public getSenderPublicKey(): Uint8Array {
if (!this.isSigned()) {
const msg = this._errorMsg('Cannot call this method if transaction is not signed');
throw new Error(msg);
}
const msgHash = this.getMessageToVerifySignature();
const { v, r, s } = this;
this._validateHighS();
try {
return ecrecover(
msgHash,
v! + BigInt(27), // Recover the 27 which was stripped from ecsign
bigIntToUnpaddedUint8Array(r!),
bigIntToUnpaddedUint8Array(s!),
);
} catch (e: any) {
const msg = this._errorMsg('Invalid Signature');
throw new Error(msg);
}
}
public _processSignature(v: bigint, r: Uint8Array, s: Uint8Array) {
const opts = { ...this.txOptions, common: this.common };
return FeeMarketEIP1559Transaction.fromTxData(
{
chainId: this.chainId,
nonce: this.nonce,
maxPriorityFeePerGas: this.maxPriorityFeePerGas,
maxFeePerGas: this.maxFeePerGas,
gasLimit: this.gasLimit,
to: this.to,
value: this.value,
data: this.data,
accessList: this.accessList,
v: v - BigInt(27), // This looks extremely hacky: /util actually adds 27 to the value, the recovery bit is either 0 or 1.
r: uint8ArrayToBigInt(r),
s: uint8ArrayToBigInt(s),
},
opts,
);
}
/**
* Returns an object with the JSON representation of the transaction
*/
public toJSON(): JsonTx {
const accessListJSON = getAccessListJSON(this.accessList);
return {
chainId: bigIntToHex(this.chainId),
nonce: bigIntToHex(this.nonce),
maxPriorityFeePerGas: bigIntToHex(this.maxPriorityFeePerGas),
maxFeePerGas: bigIntToHex(this.maxFeePerGas),
gasLimit: bigIntToHex(this.gasLimit),
to: this.to !== undefined ? this.to.toString() : undefined,
value: bigIntToHex(this.value),
data: bytesToHex(this.data),
accessList: accessListJSON,
v: this.v !== undefined ? bigIntToHex(this.v) : undefined,
r: this.r !== undefined ? bigIntToHex(this.r) : undefined,
s: this.s !== undefined ? bigIntToHex(this.s) : undefined,
};
}
/**
* Return a compact error string representation of the object
*/
public errorStr() {
let errorStr = this._getSharedErrorPostfix();
errorStr += ` maxFeePerGas=${this.maxFeePerGas} maxPriorityFeePerGas=${this.maxPriorityFeePerGas}`;
return errorStr;
}
/**
* Internal helper function to create an annotated error message
*
* @param msg Base error message
* @hidden
*/
protected _errorMsg(msg: string) {
return `${msg} (${this.errorStr()})`;
}
}