// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.12;

import "./UserOperation.sol";

interface IWallet {

    /**
     * Validate user's signature and nonce
     * the entryPoint will make the call to the recipient only if this validation call returns successfully.
     *
     * @dev Must validate caller is the entryPoint.
     *      Must validate the signature and nonce
     * @param userOp the operation that is about to be executed.
     * @param requestId hash of the user's request data. can be used as the basis for signature.
     * @param aggregator the aggregator used to validate the signature. NULL for non-aggregated signature wallets.
     * @param missingWalletFunds missing funds on the wallet's deposit in the entrypoint.
     *      This is the minimum amount to transfer to the sender(entryPoint) to be able to make the call.
     *      The excess is left as a deposit in the entrypoint, for future calls.
     *      can be withdrawn anytime using "entryPoint.withdrawTo()"
     *      In case there is a paymaster in the request (or the current deposit is high enough), this value will be zero.
     */
    function validateUserOp(UserOperation calldata userOp, bytes32 requestId, address aggregator, uint256 missingWalletFunds) external;
}