Add EIP-7702 qa

Author: hyeonLewis

Diff for: package-lock.json

@@ -21,12 +21,12 @@
     "tslib": "^2.6.1"
   },
   "dependencies": {
-    "@klaytn/ethers-ext": "^1.0.2",
+    "@kaiachain/ethers-ext": "^1.1.1",
     "axios": "^1.6.5",
     "bls-signatures": "^2.0.2",
     "caver-js": "^1.11.0",
     "dotenv": "^16.3.2",
-    "ethers": "^5.7.0",
+    "ethers": "^5.7.2",
     "plotly": "^1.0.6"
   }
 }

Diff for: package.json

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: LGPL-3.0-only
+pragma solidity 0.8.25;
+
+contract Delegation {
+    uint256 public count;
+
+    function increment() external {
+        count++;
+    }
+
+    // It will increase count2 of Delegation2 contract
+    function callIncrement(address _addr) external {
+        (bool success, ) = _addr.call(abi.encodeWithSignature("increment()"));
+        require(success, "Call failed");
+    }
+
+    function getCount(address _addr) external view returns (uint256) {
+        (bool success, bytes memory data) = _addr.staticcall(abi.encodeWithSignature("count()"));
+        require(success, "Staticcall failed");
+        return abi.decode(data, (uint256));
+    }
+
+    // callcode has been deprecated
+
+    // It will increase count of Delegation contract
+    function delegatecallIncrement(address _addr) external {
+        (bool success, ) = _addr.delegatecall(abi.encodeWithSignature("increment()"));
+        require(success, "Delegatecall failed");
+    }
+
+    function callcodeIncrement(address _addr) external {
+        bytes memory data = abi.encodeWithSignature("increment()");
+        assembly {
+            let success := callcode(gas(), _addr, 0, add(data, 0x20), mload(data), 0, 0)
+            if iszero(success) {
+                revert(0, 0)
+            }
+        }
+    }
+
+    function getCodeFields(address _addr) external view returns (bytes memory code, bytes32 codehash, uint256 size) {
+        // Testing EXTCODESIZE, EXTCODECOPY, EXTCODEHASH
+        return (_addr.code, _addr.codehash, _addr.code.length);
+    }
+}