@charterlabs/permissionless
Version:
A utility library for working with ERC-4337
351 lines • 14 kB
JavaScript
import { decodeFunctionData, encodeFunctionData } from "viem";
import { entryPoint06Abi, entryPoint07Abi, entryPoint07Address, getUserOperationHash, toSmartAccount } from "viem/account-abstraction";
import { getChainId, signMessage } from "viem/actions";
import { getAction } from "viem/utils";
import { getAccountNonce } from "../../actions/public/getAccountNonce.js";
import { getSenderAddress } from "../../actions/public/getSenderAddress.js";
import { toOwner } from "../../utils/toOwner.js";
const getAccountInitCode = async (owner, index = BigInt(0)) => {
if (!owner)
throw new Error("Owner account not found");
return encodeFunctionData({
abi: [
{
inputs: [
{
internalType: "address",
name: "owner",
type: "address"
},
{
internalType: "uint256",
name: "salt",
type: "uint256"
}
],
name: "createAccount",
outputs: [
{
internalType: "contract SimpleAccount",
name: "ret",
type: "address"
}
],
stateMutability: "nonpayable",
type: "function"
}
],
functionName: "createAccount",
args: [owner, index]
});
};
const getFactoryAddress = (entryPointVersion, factoryAddress) => {
if (factoryAddress)
return factoryAddress;
if (entryPointVersion === "0.6") {
return "0x9406Cc6185a346906296840746125a0E44976454";
}
return "0x91E60e0613810449d098b0b5Ec8b51A0FE8c8985";
};
/**
* @description Creates an Simple Account from a private key.
*
* @returns A Private Key Simple Account.
*/
export async function toSimpleSmartAccount(parameters) {
const { client, owner, factoryAddress: _factoryAddress, index = BigInt(0), address, nonceKey } = parameters;
const localOwner = await toOwner({ owner });
const entryPoint = {
address: parameters.entryPoint?.address ?? entryPoint07Address,
abi: (parameters.entryPoint?.version ?? "0.7") === "0.6"
? entryPoint06Abi
: entryPoint07Abi,
version: parameters.entryPoint?.version ?? "0.7"
};
const factoryAddress = getFactoryAddress(entryPoint.version, _factoryAddress);
let accountAddress = address;
let chainId;
const getMemoizedChainId = async () => {
if (chainId)
return chainId;
chainId = client.chain
? client.chain.id
: await getAction(client, getChainId, "getChainId")({});
return chainId;
};
const getFactoryArgs = async () => {
return {
factory: factoryAddress,
factoryData: await getAccountInitCode(localOwner.address, index)
};
};
return toSmartAccount({
client,
entryPoint,
getFactoryArgs,
async getAddress() {
if (accountAddress)
return accountAddress;
const { factory, factoryData } = await getFactoryArgs();
// Get the sender address based on the init code
accountAddress = await getSenderAddress(client, {
factory,
factoryData,
entryPointAddress: entryPoint.address
});
return accountAddress;
},
async encodeCalls(calls) {
if (calls.length > 1) {
if (entryPoint.version === "0.6") {
return encodeFunctionData({
abi: [
{
inputs: [
{
internalType: "address[]",
name: "dest",
type: "address[]"
},
{
internalType: "bytes[]",
name: "func",
type: "bytes[]"
}
],
name: "executeBatch",
outputs: [],
stateMutability: "nonpayable",
type: "function"
}
],
functionName: "executeBatch",
args: [
calls.map((a) => a.to),
calls.map((a) => a.data ?? "0x")
]
});
}
return encodeFunctionData({
abi: [
{
inputs: [
{
internalType: "address[]",
name: "dest",
type: "address[]"
},
{
internalType: "uint256[]",
name: "value",
type: "uint256[]"
},
{
internalType: "bytes[]",
name: "func",
type: "bytes[]"
}
],
name: "executeBatch",
outputs: [],
stateMutability: "nonpayable",
type: "function"
}
],
functionName: "executeBatch",
args: [
calls.map((a) => a.to),
calls.map((a) => a.value ?? 0n),
calls.map((a) => a.data ?? "0x")
]
});
}
const call = calls.length === 0 ? undefined : calls[0];
if (!call) {
throw new Error("No calls to encode");
}
return encodeFunctionData({
abi: [
{
inputs: [
{
internalType: "address",
name: "dest",
type: "address"
},
{
internalType: "uint256",
name: "value",
type: "uint256"
},
{
internalType: "bytes",
name: "func",
type: "bytes"
}
],
name: "execute",
outputs: [],
stateMutability: "nonpayable",
type: "function"
}
],
functionName: "execute",
args: [call.to, call.value ?? 0n, call.data ?? "0x"]
});
},
decodeCalls: async (callData) => {
try {
const decodedV6 = decodeFunctionData({
abi: [
{
inputs: [
{
internalType: "address[]",
name: "dest",
type: "address[]"
},
{
internalType: "bytes[]",
name: "func",
type: "bytes[]"
}
],
name: "executeBatch",
outputs: [],
stateMutability: "nonpayable",
type: "function"
}
],
data: callData
});
const calls = [];
for (let i = 0; i < decodedV6.args.length; i++) {
calls.push({
to: decodedV6.args[0][i],
data: decodedV6.args[1][i],
value: 0n
});
}
return calls;
}
catch (_) {
try {
const decodedV7 = decodeFunctionData({
abi: [
{
inputs: [
{
internalType: "address[]",
name: "dest",
type: "address[]"
},
{
internalType: "uint256[]",
name: "value",
type: "uint256[]"
},
{
internalType: "bytes[]",
name: "func",
type: "bytes[]"
}
],
name: "executeBatch",
outputs: [],
stateMutability: "nonpayable",
type: "function"
}
],
data: callData
});
const calls = [];
for (let i = 0; i < decodedV7.args[0].length; i++) {
calls.push({
to: decodedV7.args[0][i],
value: decodedV7.args[1][i],
data: decodedV7.args[2][i]
});
}
return calls;
}
catch (_) {
const decodedSingle = decodeFunctionData({
abi: [
{
inputs: [
{
internalType: "address",
name: "dest",
type: "address"
},
{
internalType: "uint256",
name: "value",
type: "uint256"
},
{
internalType: "bytes",
name: "func",
type: "bytes"
}
],
name: "execute",
outputs: [],
stateMutability: "nonpayable",
type: "function"
}
],
data: callData
});
return [
{
to: decodedSingle.args[0],
value: decodedSingle.args[1],
data: decodedSingle.args[2]
}
];
}
}
},
async getNonce(args) {
return getAccountNonce(client, {
address: await this.getAddress(),
entryPointAddress: entryPoint.address,
key: nonceKey ?? args?.key
});
},
async getStubSignature() {
return "0xfffffffffffffffffffffffffffffff0000000000000000000000000000000007aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1c";
},
async sign({ hash }) {
return this.signMessage({ message: hash });
},
signMessage: async (_) => {
throw new Error("Simple account isn't 1271 compliant");
},
signTypedData: async (_) => {
throw new Error("Simple account isn't 1271 compliant");
},
async signUserOperation(parameters) {
const { chainId = await getMemoizedChainId(), ...userOperation } = parameters;
return signMessage(client, {
account: localOwner,
message: {
raw: getUserOperationHash({
userOperation: {
...userOperation,
sender: userOperation.sender ??
(await this.getAddress()),
signature: "0x"
},
entryPointAddress: entryPoint.address,
entryPointVersion: entryPoint.version,
chainId: chainId
})
}
});
}
});
}
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