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// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.22;

import {Proxy} from "@openzeppelin/contracts/proxy/Proxy.sol";
import {IBeacon} from "contracts/interfaces/base/proxy/IBeacon.sol";
import {SafeCall} from "contracts/libraries/SafeCall.sol";

contract ImmutableBeaconProxy is Proxy {
    using {SafeCall.safeDelegateCall} for address;

    address private immutable beacon;

    error BeaconCallFailed();
    error BeaconReturnedUnexpectedNumberOfBytes(uint256);
    error BeaconReturnedAddressZero();

    constructor(bytes memory initDataWithSelector) {
        beacon = msg.sender;

        if (initDataWithSelector.length > 0) {
            _implementation().safeDelegateCall(initDataWithSelector);
        } else {
            // Make sure msg.sender implements IBeacon interface
            _implementation();
        }
    }

    function _implementation() internal view override returns (address impl) {
        (bool success, bytes memory result) = beacon.staticcall(
            abi.encodeCall(IBeacon.implementation, ())
        );

        if (!success) revert BeaconCallFailed();
        if (result.length != 32) revert BeaconReturnedUnexpectedNumberOfBytes(result.length);

        impl = abi.decode(result, (address));
        if (impl == address(0)) revert BeaconReturnedAddressZero();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/Proxy.sol)

pragma solidity ^0.8.20;

/**
 * @dev This abstract contract provides a fallback function that delegates all calls to another contract using the EVM
 * instruction `delegatecall`. We refer to the second contract as the _implementation_ behind the proxy, and it has to
 * be specified by overriding the virtual {_implementation} function.
 *
 * Additionally, delegation to the implementation can be triggered manually through the {_fallback} function, or to a
 * different contract through the {_delegate} function.
 *
 * The success and return data of the delegated call will be returned back to the caller of the proxy.
 */
abstract contract Proxy {
    /**
     * @dev Delegates the current call to `implementation`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _delegate(address implementation) internal virtual {
        assembly {
            // Copy msg.data. We take full control of memory in this inline assembly
            // block because it will not return to Solidity code. We overwrite the
            // Solidity scratch pad at memory position 0.
            calldatacopy(0, 0, calldatasize())

            // Call the implementation.
            // out and outsize are 0 because we don't know the size yet.
            let result := delegatecall(gas(), implementation, 0, calldatasize(), 0, 0)

            // Copy the returned data.
            returndatacopy(0, 0, returndatasize())

            switch result
            // delegatecall returns 0 on error.
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @dev This is a virtual function that should be overridden so it returns the address to which the fallback
     * function and {_fallback} should delegate.
     */
    function _implementation() internal view virtual returns (address);

    /**
     * @dev Delegates the current call to the address returned by `_implementation()`.
     *
     * This function does not return to its internal call site, it will return directly to the external caller.
     */
    function _fallback() internal virtual {
        _delegate(_implementation());
    }

    /**
     * @dev Fallback function that delegates calls to the address returned by `_implementation()`. Will run if no other
     * function in the contract matches the call data.
     */
    fallback() external payable virtual {
        _fallback();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
     */
    function _revert(bytes memory returndata) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert FailedInnerCall();
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.22;

import {CommandLibrary} from "contracts/libraries/CommandLibrary.sol";

/**
 * @title Command
 * @notice Contains arguments for a low-level call.
 * @dev This struct allows deferring the call's execution, suspending it by passing it to another function or contract.
 * @dev `target` The address to be called.
 * @dev `value` Value to send in the call.
 * @dev `payload` Encoded call with function selector and arguments.
 */
struct Command {
    address target;
    uint256 value;
    bytes payload;
}

using CommandLibrary for Command global;

// SPDX-License-Identifier: MIT
pragma solidity 0.8.22;

interface IBeacon {
    error ImplementationAddressIsZero();

    /**
     * This upgrade will affect all Beacon Proxies that use this Beacon
     * @param newImplementation New implementation to delegate calls from Beacon Proxies
     */
    function upgradeTo(address newImplementation) external;

    /**
     * Returns address of the current used by Beacon Proxies
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.22;

import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {Command} from "contracts/interfaces/accountAbstraction/interpreter/Command.sol";
import {SafeCall} from "contracts/libraries/SafeCall.sol";

/**
 * @notice Utility to convert often-used methods into a Command object
 */
library CommandPresets {
    function approve(
        address _token,
        address _to,
        uint256 _amount
    ) internal pure returns (Command memory cmd_) {
        cmd_.target = _token;
        cmd_.payload = abi.encodeCall(IERC20.approve, (_to, _amount));
    }

    function transfer(
        address _token,
        address _to,
        uint256 _amount
    ) internal pure returns (Command memory cmd_) {
        cmd_.target = _token;
        cmd_.payload = abi.encodeCall(IERC20.transfer, (_to, _amount));
    }
}

library CommandExecutor {
    using SafeCall for Command[];

    function execute(Command[] calldata _cmds) external {
        _cmds.safeCallAll();
    }
}

library CommandLibrary {
    using CommandLibrary for Command[];

    function last(Command[] memory _self) internal pure returns (Command memory) {
        return _self[_self.length - 1];
    }

    function asArray(Command memory _self) internal pure returns (Command[] memory result_) {
        result_ = new Command[](1);
        result_[0] = _self;
    }

    function concat(
        Command memory _self,
        Command memory _cmd
    ) internal pure returns (Command[] memory result_) {
        result_ = new Command[](2);
        result_[0] = _self;
        result_[1] = _cmd;
    }

    function concat(
        Command memory _self,
        Command[] memory _cmds
    ) internal pure returns (Command[] memory result_) {
        result_ = new Command[](_cmds.length + 1);
        result_[0] = _self;
        for (uint256 i = 1; i < result_.length; i++) {
            result_[i] = _cmds[i - 1];
        }
    }

    function append(
        Command[] memory _self,
        Command[] memory _cmds
    ) internal pure returns (Command[] memory result_) {
        result_ = new Command[](_self.length + _cmds.length);
        uint256 i;
        for (; i < _self.length; i++) {
            result_[i] = _self[i];
        }
        for (; i < result_.length; i++) {
            result_[i] = _cmds[i - _self.length];
        }
    }

    function push(
        Command[] memory _self,
        Command memory _cmd
    ) internal pure returns (Command[] memory result_) {
        result_ = new Command[](_self.length + 1);
        for (uint256 i; i < _self.length; i++) {
            result_[i] = _self[i];
        }
        result_[_self.length] = _cmd;
    }

    function unshift(
        Command[] memory _self,
        Command memory _cmd
    ) internal pure returns (Command[] memory result_) {
        result_ = new Command[](1 + _self.length);
        result_[0] = _cmd;
        for (uint256 i = 1; i < result_.length; i++) {
            result_[i] = _self[i - 1];
        }
    }

    function unshift(
        Command[] memory _self,
        Command[] memory _cmds
    ) internal pure returns (Command[] memory result_) {
        result_ = new Command[](_cmds.length + _self.length);
        uint256 i;
        for (; i < _cmds.length; i++) {
            result_[i] = _cmds[i];
        }
        for (; i < result_.length; i++) {
            result_[i] = _self[i - _cmds.length];
        }
    }

    function populateWithApprove(
        Command memory _self,
        address _token,
        uint256 _amount
    ) internal pure returns (Command[] memory result_) {
        if (_amount != 0) {
            result_ = CommandPresets.approve(_token, _self.target, _amount).concat(_self);
        } else {
            result_ = _self.asArray();
        }
    }

    function populateWithRevokeAndApprove(
        Command memory _self,
        address _token,
        uint256 _amount
    ) internal pure returns (Command[] memory result_) {
        return
            CommandPresets.approve(_token, _self.target, 0).concat(
                _self.populateWithApprove(_token, _amount)
            );
    }

    function populateWithApprove(
        Command[] memory _self,
        address _token,
        uint256 _amount
    ) internal pure returns (Command[] memory result_) {
        if (_amount != 0) {
            result_ = _self.unshift(
                CommandPresets.approve(_token, _self[_self.length - 1].target, _amount)
            );
        } else {
            result_ = _self;
        }
    }

    function populateWithApprove(
        Command memory _self,
        address[2] memory _tokens,
        uint256[2] memory _amounts
    ) internal pure returns (Command[] memory result_) {
        if (_amounts[0] != 0 && _amounts[1] != 0) {
            result_ = CommandPresets
                .approve(_tokens[0], _self.target, _amounts[0])
                .concat(CommandPresets.approve(_tokens[1], _self.target, _amounts[1]))
                .push(_self);
        } else {
            if (_amounts[0] != 0) {
                result_ = populateWithApprove(_self, _tokens[0], _amounts[0]);
            } else {
                result_ = populateWithApprove(_self, _tokens[1], _amounts[1]);
            }
        }
    }

    function populateWithApprove(
        Command memory _self,
        address[3] memory _tokens,
        uint256[3] memory _amounts
    ) internal pure returns (Command[] memory result_) {
        if (_amounts[0] != 0 && _amounts[1] != 0 && _amounts[2] != 0) {
            result_ = CommandPresets
                .approve(_tokens[0], _self.target, _amounts[0])
                .concat(CommandPresets.approve(_tokens[1], _self.target, _amounts[1]))
                .push(CommandPresets.approve(_tokens[2], _self.target, _amounts[2]))
                .push(_self);
        } else {
            if (_amounts[0] == 0) {
                result_ = populateWithApprove(
                    _self,
                    [_tokens[1], _tokens[2]],
                    [_amounts[1], _amounts[2]]
                );
            } else if (_amounts[1] == 0) {
                result_ = populateWithApprove(
                    _self,
                    [_tokens[0], _tokens[2]],
                    [_amounts[0], _amounts[2]]
                );
            } else {
                result_ = populateWithApprove(
                    _self,
                    [_tokens[0], _tokens[1]],
                    [_amounts[0], _amounts[1]]
                );
            }
        }
    }

    function populateWithApprove(
        Command memory _self,
        address[4] memory _tokens,
        uint256[4] memory _amounts
    ) internal pure returns (Command[] memory result_) {
        if (_amounts[0] != 0 && _amounts[1] != 0 && _amounts[2] != 0 && _amounts[3] != 0) {
            result_ = CommandPresets
                .approve(_tokens[0], _self.target, _amounts[0])
                .concat(CommandPresets.approve(_tokens[1], _self.target, _amounts[1]))
                .push(CommandPresets.approve(_tokens[2], _self.target, _amounts[2]))
                .push(CommandPresets.approve(_tokens[3], _self.target, _amounts[3]))
                .push(_self);
        } else {
            if (_amounts[0] == 0) {
                result_ = populateWithApprove(
                    _self,
                    [_tokens[1], _tokens[2], _tokens[3]],
                    [_amounts[1], _amounts[2], _amounts[3]]
                );
            } else if (_amounts[1] == 0) {
                result_ = populateWithApprove(
                    _self,
                    [_tokens[0], _tokens[2], _tokens[3]],
                    [_amounts[0], _amounts[2], _amounts[3]]
                );
            } else if (_amounts[2] == 0) {
                result_ = populateWithApprove(
                    _self,
                    [_tokens[0], _tokens[1], _tokens[3]],
                    [_amounts[0], _amounts[1], _amounts[3]]
                );
            } else {
                result_ = populateWithApprove(
                    _self,
                    [_tokens[0], _tokens[1], _tokens[2]],
                    [_amounts[0], _amounts[1], _amounts[2]]
                );
            }
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.22;

import {Address} from "@openzeppelin/contracts/utils/Address.sol";
import {Command} from "contracts/interfaces/accountAbstraction/interpreter/Command.sol";

/**
 * @notice Safe methods performing a low-level calls that revert
 * if the call was not successful
 */
library SafeCall {
    using Address for address;

    function safeCallAll(Command[] memory _cmds) internal {
        for (uint256 i; i < _cmds.length; i++) {
            safeCall(_cmds[i]);
        }
    }

    function safeCall(Command memory _cmd) internal returns (bytes memory result_) {
        result_ = safeCall(_cmd.target, _cmd.value, _cmd.payload);
    }

    function safeCall(address _target, bytes memory _data) internal returns (bytes memory result_) {
        result_ = safeCall(_target, 0, _data);
    }

    function safeCall(
        address _target,
        uint256 _value,
        bytes memory _data
    ) internal returns (bytes memory result_) {
        result_ = _target.functionCallWithValue(_data, _value);
    }

    function safeDelegateCall(
        address _target,
        bytes memory _data
    ) internal returns (bytes memory result_) {
        result_ = _target.functionDelegateCall(_data);
    }
}

{
  "viaIR": true,
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"bytes","name":"initDataWithSelector","type":"bytes"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[],"name":"BeaconCallFailed","type":"error"},{"inputs":[],"name":"BeaconReturnedAddressZero","type":"error"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"BeaconReturnedUnexpectedNumberOfBytes","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"stateMutability":"payable","type":"fallback"}]

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