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SimpleAccountFactory.sol
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SimpleAccountFactory.sol
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// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.23;
import "@openzeppelin/contracts/utils/Create2.sol";
import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
import "./SimpleAccount.sol";
/**
* A sample factory contract for SimpleAccount
* A UserOperations "initCode" holds the address of the factory, and a method call (to createAccount, in this sample factory).
* The factory's createAccount returns the target account address even if it is already installed.
* This way, the entryPoint.getSenderAddress() can be called either before or after the account is created.
*/
contract SimpleAccountFactory {
SimpleAccount public immutable accountImplementation;
constructor(IEntryPoint _entryPoint) {
accountImplementation = new SimpleAccount(_entryPoint);
}
/**
* create an account, and return its address.
* returns the address even if the account is already deployed.
* Note that during UserOperation execution, this method is called only if the account is not deployed.
* This method returns an existing account address so that entryPoint.getSenderAddress() would work even after account creation
*/
function createAccount(address owner,uint256 salt) public returns (SimpleAccount ret) {
address addr = getAddress(owner, salt);
uint256 codeSize = addr.code.length;
if (codeSize > 0) {
return SimpleAccount(payable(addr));
}
ret = SimpleAccount(payable(new ERC1967Proxy{salt : bytes32(salt)}(
address(accountImplementation),
abi.encodeCall(SimpleAccount.initialize, (owner))
)));
}
/**
* calculate the counterfactual address of this account as it would be returned by createAccount()
*/
function getAddress(address owner,uint256 salt) public view returns (address) {
return Create2.computeAddress(bytes32(salt), keccak256(abi.encodePacked(
type(ERC1967Proxy).creationCode,
abi.encode(
address(accountImplementation),
abi.encodeCall(SimpleAccount.initialize, (owner))
)
)));
}
}