ox
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JavaScript
import * as AccessList from './AccessList.js';
import * as Address from './Address.js';
import * as Authorization from './Authorization.js';
import * as Hash from './Hash.js';
import * as Hex from './Hex.js';
import * as Rlp from './Rlp.js';
import * as Signature from './Signature.js';
import * as TransactionEnvelope from './TransactionEnvelope.js';
import * as TransactionEnvelopeEip1559 from './TransactionEnvelopeEip1559.js';
export const serializedType = '0x04';
export const type = 'eip7702';
/**
* Asserts a {@link ox#TransactionEnvelopeEip7702.TransactionEnvelopeEip7702} is valid.
*
* @example
* ```ts twoslash
* import { TransactionEnvelopeEip7702, Value } from 'ox'
*
* TransactionEnvelopeEip7702.assert({
* authorizationList: [],
* maxFeePerGas: 2n ** 256n - 1n + 1n,
* chainId: 1,
* to: '0x0000000000000000000000000000000000000000',
* value: Value.fromEther('1'),
* })
* // @error: FeeCapTooHighError:
* // @error: The fee cap (`masFeePerGas` = 115792089237316195423570985008687907853269984665640564039457584007913 gwei) cannot be
* // @error: higher than the maximum allowed value (2^256-1).
* ```
*
* @param envelope - The transaction envelope to assert.
*/
export function assert(envelope) {
const { authorizationList } = envelope;
if (authorizationList) {
for (const authorization of authorizationList) {
const { address, chainId } = authorization;
if (address)
Address.assert(address, { strict: false });
if (Number(chainId) < 0)
throw new TransactionEnvelope.InvalidChainIdError({ chainId });
}
}
TransactionEnvelopeEip1559.assert(envelope);
}
/**
* Deserializes a {@link ox#TransactionEnvelopeEip7702.TransactionEnvelopeEip7702} from its serialized form.
*
* @example
* ```ts twoslash
* import { TransactionEnvelopeEip7702 } from 'ox'
*
* const envelope = TransactionEnvelopeEip7702.deserialize('0x04ef0182031184773594008477359400809470997970c51812dc3a010c7d01b50e0d17dc79c8880de0b6b3a764000080c0')
* // @log: {
* // @log: authorizationList: [...],
* // @log: type: 'eip7702',
* // @log: nonce: 785n,
* // @log: maxFeePerGas: 2000000000n,
* // @log: gas: 1000000n,
* // @log: to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
* // @log: value: 1000000000000000000n,
* // @log: }
* ```
*
* @param serialized - The serialized transaction.
* @returns Deserialized Transaction Envelope.
*/
export function deserialize(serialized) {
const transactionArray = Rlp.toHex(Hex.slice(serialized, 1));
const [chainId, nonce, maxPriorityFeePerGas, maxFeePerGas, gas, to, value, data, accessList, authorizationList, yParity, r, s,] = transactionArray;
if (!(transactionArray.length === 10 || transactionArray.length === 13))
throw new TransactionEnvelope.InvalidSerializedError({
attributes: {
chainId,
nonce,
maxPriorityFeePerGas,
maxFeePerGas,
gas,
to,
value,
data,
accessList,
authorizationList,
...(transactionArray.length > 9
? {
yParity,
r,
s,
}
: {}),
},
serialized,
type,
});
let transaction = {
chainId: Number(chainId),
type,
};
if (Hex.validate(to) && to !== '0x')
transaction.to = to;
if (Hex.validate(gas) && gas !== '0x')
transaction.gas = BigInt(gas);
if (Hex.validate(data) && data !== '0x')
transaction.data = data;
if (Hex.validate(nonce))
transaction.nonce = nonce === '0x' ? 0n : BigInt(nonce);
if (Hex.validate(value) && value !== '0x')
transaction.value = BigInt(value);
if (Hex.validate(maxFeePerGas) && maxFeePerGas !== '0x')
transaction.maxFeePerGas = BigInt(maxFeePerGas);
if (Hex.validate(maxPriorityFeePerGas) && maxPriorityFeePerGas !== '0x')
transaction.maxPriorityFeePerGas = BigInt(maxPriorityFeePerGas);
if (accessList.length !== 0 && accessList !== '0x')
transaction.accessList = AccessList.fromTupleList(accessList);
if (authorizationList !== '0x')
transaction.authorizationList = Authorization.fromTupleList(authorizationList);
const signature = r && s && yParity ? Signature.fromTuple([yParity, r, s]) : undefined;
if (signature)
transaction = {
...transaction,
...signature,
};
assert(transaction);
return transaction;
}
/**
* Converts an arbitrary transaction object into an EIP-7702 Transaction Envelope.
*
* @example
* ```ts twoslash
* import { Authorization, Secp256k1, TransactionEnvelopeEip7702, Value } from 'ox'
*
* const authorization = Authorization.from({
* address: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
* chainId: 1,
* nonce: 0n,
* })
*
* const signature = Secp256k1.sign({
* payload: Authorization.getSignPayload(authorization),
* privateKey: '0x...',
* })
*
* const authorizationList = [Authorization.from(authorization, { signature })]
*
* const envelope = TransactionEnvelopeEip7702.from({ // [!code focus]
* authorizationList, // [!code focus]
* chainId: 1, // [!code focus]
* maxFeePerGas: Value.fromGwei('10'), // [!code focus]
* maxPriorityFeePerGas: Value.fromGwei('1'), // [!code focus]
* to: '0x0000000000000000000000000000000000000000', // [!code focus]
* value: Value.fromEther('1'), // [!code focus]
* }) // [!code focus]
* ```
*
* @example
* ### Attaching Signatures
*
* It is possible to attach a `signature` to the transaction envelope.
*
* ```ts twoslash
* // @noErrors
* import { Secp256k1, TransactionEnvelopeEip7702, Value } from 'ox'
*
* const envelope = TransactionEnvelopeEip7702.from({
* authorizationList: [...],
* chainId: 1,
* maxFeePerGas: Value.fromGwei('10'),
* maxPriorityFeePerGas: Value.fromGwei('1'),
* to: '0x0000000000000000000000000000000000000000',
* value: Value.fromEther('1'),
* })
*
* const signature = Secp256k1.sign({
* payload: TransactionEnvelopeEip7702.getSignPayload(envelope),
* privateKey: '0x...',
* })
*
* const envelope_signed = TransactionEnvelopeEip7702.from(envelope, { // [!code focus]
* signature, // [!code focus]
* }) // [!code focus]
* // @log: {
* // @log: authorizationList: [...],
* // @log: chainId: 1,
* // @log: maxFeePerGas: 10000000000n,
* // @log: maxPriorityFeePerGas: 1000000000n,
* // @log: to: '0x0000000000000000000000000000000000000000',
* // @log: type: 'eip7702',
* // @log: value: 1000000000000000000n,
* // @log: r: 125...n,
* // @log: s: 642...n,
* // @log: yParity: 0,
* // @log: }
* ```
*
* @example
* ### From Serialized
*
* It is possible to instantiate an EIP-7702 Transaction Envelope from a {@link ox#TransactionEnvelopeEip7702.Serialized} value.
*
* ```ts twoslash
* import { TransactionEnvelopeEip7702 } from 'ox'
*
* const envelope = TransactionEnvelopeEip7702.from('0x04f858018203118502540be4008504a817c800809470997970c51812dc3a010c7d01b50e0d17dc79c8880de0b6b3a764000080c08477359400e1a001627c687261b0e7f8638af1112efa8a77e23656f6e7945275b19e9deed80261')
* // @log: {
* // @log: authorizationList: [...],
* // @log: chainId: 1,
* // @log: maxFeePerGas: 10000000000n,
* // @log: to: '0x0000000000000000000000000000000000000000',
* // @log: type: 'eip7702',
* // @log: value: 1000000000000000000n,
* // @log: }
* ```
*
* @param envelope - The transaction object to convert.
* @param options - Options.
* @returns An EIP-7702 Transaction Envelope.
*/
export function from(envelope, options = {}) {
const { signature } = options;
const envelope_ = (typeof envelope === 'string' ? deserialize(envelope) : envelope);
assert(envelope_);
return {
...envelope_,
...(signature ? Signature.from(signature) : {}),
type: 'eip7702',
};
}
/**
* Returns the payload to sign for a {@link ox#TransactionEnvelopeEip7702.TransactionEnvelopeEip7702}.
*
* @example
* The example below demonstrates how to compute the sign payload which can be used
* with ECDSA signing utilities like {@link ox#Secp256k1.(sign:function)}.
*
* ```ts twoslash
* // @noErrors
* import { Secp256k1, TransactionEnvelopeEip7702 } from 'ox'
*
* const envelope = TransactionEnvelopeEip7702.from({
* authorizationList: [...],
* chainId: 1,
* nonce: 0n,
* maxFeePerGas: 1000000000n,
* gas: 21000n,
* to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
* value: 1000000000000000000n,
* })
*
* const payload = TransactionEnvelopeEip7702.getSignPayload(envelope) // [!code focus]
* // @log: '0x...'
*
* const signature = Secp256k1.sign({ payload, privateKey: '0x...' })
* ```
*
* @param envelope - The transaction envelope to get the sign payload for.
* @returns The sign payload.
*/
export function getSignPayload(envelope) {
return hash(envelope, { presign: true });
}
/**
* Hashes a {@link ox#TransactionEnvelopeEip7702.TransactionEnvelopeEip7702}. This is the "transaction hash".
*
* @example
* ```ts twoslash
* // @noErrors
* import { Secp256k1, TransactionEnvelopeEip7702 } from 'ox'
*
* const envelope = TransactionEnvelopeEip7702.from({
* authorizationList: [...],
* chainId: 1,
* nonce: 0n,
* maxFeePerGas: 1000000000n,
* gas: 21000n,
* to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
* value: 1000000000000000000n,
* })
*
* const signature = Secp256k1.sign({
* payload: TransactionEnvelopeEip7702.getSignPayload(envelope),
* privateKey: '0x...'
* })
*
* const envelope_signed = TransactionEnvelopeEip7702.from(envelope, { signature })
*
* const hash = TransactionEnvelopeEip7702.hash(envelope_signed) // [!code focus]
* ```
*
* @param envelope - The EIP-7702 Transaction Envelope to hash.
* @param options - Options.
* @returns The hash of the transaction envelope.
*/
export function hash(envelope, options = {}) {
const { presign } = options;
return Hash.keccak256(serialize({
...envelope,
...(presign
? {
r: undefined,
s: undefined,
yParity: undefined,
}
: {}),
}));
}
/**
* Serializes a {@link ox#TransactionEnvelopeEip7702.TransactionEnvelopeEip7702}.
*
* @example
* ```ts twoslash
* // @noErrors
* import { Authorization, Secp256k1, TransactionEnvelopeEip7702, Value } from 'ox'
*
* const authorization = Authorization.from({
* address: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
* chainId: 1,
* nonce: 0n,
* })
*
* const signature = Secp256k1.sign({
* payload: Authorization.getSignPayload(authorization),
* privateKey: '0x...',
* })
*
* const authorizationList = [Authorization.from(authorization, { signature })]
*
* const envelope = TransactionEnvelopeEip7702.from({
* authorizationList,
* chainId: 1,
* maxFeePerGas: Value.fromGwei('10'),
* to: '0x0000000000000000000000000000000000000000',
* value: Value.fromEther('1'),
* })
*
* const serialized = TransactionEnvelopeEip7702.serialize(envelope) // [!code focus]
* ```
*
* @example
* ### Attaching Signatures
*
* It is possible to attach a `signature` to the serialized Transaction Envelope.
*
* ```ts twoslash
* // @noErrors
* import { Secp256k1, TransactionEnvelopeEip7702, Value } from 'ox'
*
* const envelope = TransactionEnvelopeEip7702.from({
* authorizationList: [...],
* chainId: 1,
* maxFeePerGas: Value.fromGwei('10'),
* to: '0x0000000000000000000000000000000000000000',
* value: Value.fromEther('1'),
* })
*
* const signature = Secp256k1.sign({
* payload: TransactionEnvelopeEip7702.getSignPayload(envelope),
* privateKey: '0x...',
* })
*
* const serialized = TransactionEnvelopeEip7702.serialize(envelope, { // [!code focus]
* signature, // [!code focus]
* }) // [!code focus]
*
* // ... send `serialized` transaction to JSON-RPC `eth_sendRawTransaction`
* ```
*
* @param envelope - The Transaction Envelope to serialize.
* @param options - Options.
* @returns The serialized Transaction Envelope.
*/
export function serialize(envelope, options = {}) {
const { authorizationList, chainId, gas, nonce, to, value, maxFeePerGas, maxPriorityFeePerGas, accessList, data, input, } = envelope;
assert(envelope);
const accessTupleList = AccessList.toTupleList(accessList);
const authorizationTupleList = Authorization.toTupleList(authorizationList);
const signature = Signature.extract(options.signature || envelope);
const serialized = [
Hex.fromNumber(chainId),
nonce ? Hex.fromNumber(nonce) : '0x',
maxPriorityFeePerGas ? Hex.fromNumber(maxPriorityFeePerGas) : '0x',
maxFeePerGas ? Hex.fromNumber(maxFeePerGas) : '0x',
gas ? Hex.fromNumber(gas) : '0x',
to ?? '0x',
value ? Hex.fromNumber(value) : '0x',
data ?? input ?? '0x',
accessTupleList,
authorizationTupleList,
...(signature ? Signature.toTuple(signature) : []),
];
return Hex.concat(serializedType, Rlp.fromHex(serialized));
}
/**
* Validates a {@link ox#TransactionEnvelopeEip7702.TransactionEnvelopeEip7702}. Returns `true` if the envelope is valid, `false` otherwise.
*
* @example
* ```ts twoslash
* import { TransactionEnvelopeEip7702, Value } from 'ox'
*
* const valid = TransactionEnvelopeEip7702.validate({
* authorizationList: [],
* maxFeePerGas: 2n ** 256n - 1n + 1n,
* chainId: 1,
* to: '0x0000000000000000000000000000000000000000',
* value: Value.fromEther('1'),
* })
* // @log: false
* ```
*
* @param envelope - The transaction envelope to validate.
*/
export function validate(envelope) {
try {
assert(envelope);
return true;
}
catch {
return false;
}
}
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