add batchers + build functions

.eslintrc.js

@@ -0,0 +1,27 @@
+module.exports = {
+    "env": {
+        "browser": true,
+        "es2021": true,
+        "node": true
+    },
+    "extends": "standard-with-typescript",
+    "overrides": [
+        {
+            "env": {
+                "node": true
+            },
+            "files": [
+                ".eslintrc.{js,cjs}"
+            ],
+            "parserOptions": {
+                "sourceType": "script"
+            }
+        }
+    ],
+    "parserOptions": {
+        "ecmaVersion": "latest",
+        "sourceType": "module"
+    },
+    "rules": {
+    }
+}

contracts/IERC2771Context.sol

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+// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/metatx/ERC2771Context.sol
+// SPDX-License-Identifier: MIT
+// OpenZeppelin Contracts (last updated v5.0.1) (metatx/ERC2771Context.sol)
+pragma solidity ^0.8.20;
+
+interface IERC2771Context {
+    function isTrustedForwarder(address forwarder) external view returns (bool);
+}

contracts/ISmartAccount.sol

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+// https://github.com/bcnmy/scw-contracts/blob/main/contracts/smart-account/SmartAccount.sol
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.17;
+
+interface ISmartAccount {
+    function executeBatch(
+        address[] calldata dest,
+        uint256[] calldata value,
+        bytes[] calldata func
+    ) external;
+}

contracts/ITrustedMulticallForwarder.sol

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+// https://github.com/Synthetixio/synthetix-v3/blob/main/auxiliary/TrustedMulticallForwarder/src/TrustedMulticallForwarder.sol
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.20;
+
+interface ITrustedMulticallForwarder {
+    struct Call3Value {
+        address target;
+        bool requireSuccess;
+        uint256 value;
+        bytes callData;
+    }
+
+    struct Result {
+        bool success;
+        bytes returnData;
+    }
+
+    function aggregate3Value(
+        Call3Value[] calldata calls
+    ) external payable returns (Result[] memory returnData);
+}