🔨 account: script to fetch ERC1271 signature

script/Account/12_AccountIsValidSignature.s.sol

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+// SPDX-License-Identifier: APACHE-2.0
+pragma solidity >=0.8.19 <0.9.0;
+
+import { SmartAccount } from "src/v1/Account/SmartAccount.sol";
+import { EIP1271_VALIDATION_SUCCESS } from "src/v1/Account/SmartAccountEIP1271.sol";
+import { BaseScript } from "../Base.s.sol";
+
+/// @title  AccountIsValidSignature
+/// @notice Check if a EIP1271 signature is valid
+contract AccountIsValidSignature is BaseScript {
+    function run() public broadcast returns (bool isValid) {
+        // address of the account we wanna use
+        address payable accountAddress = payable(vm.envAddress("ACCOUNT"));
+        SmartAccount account = SmartAccount(accountAddress);
+
+        // the message hash and the signature
+        bytes32 hash = vm.envBytes32("HASH");
+        bytes memory signature = vm.envBytes("SIGNATURE");
+
+        // check the validity of the signature
+        isValid = account.isValidSignature(hash, signature) == EIP1271_VALIDATION_SUCCESS;
+    }
+}