add script to test upgrade

v2/scripts/deploy/UpgradeGatewayEVM.s.sol

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.26;
+
+import "forge-std/Script.sol";
+import "src/evm/GatewayEVM.sol";
+import "test/utils/GatewayEVMUpgradeTest.sol";
+import "test/utils/TestERC20.sol";
+import { ERC1967Proxy } from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
+import { Upgrades } from "openzeppelin-foundry-upgrades/Upgrades.sol";
+
+contract UpgradeGatewayEVM is Script {
+    function run() external {
+        // TODO: should be passed as arg
+        string memory mnemonic = "test test test test test test test test test test test junk";
+        uint256 privateKey = vm.deriveKey(mnemonic, 0);
+        address deployer = vm.rememberKey(privateKey);
+
+        // TODO: should be passed as arg
+        address proxy = vm.envOr("PROXY_ADDRESS", address(0xA7806c719bd377F15bA6CaDf2F94Afb7FfA66256));
+
+        GatewayEVM prevImpl = GatewayEVM(proxy);
+
+        vm.startBroadcast(deployer);
+
+        Upgrades.upgradeProxy(proxy, "GatewayEVMUpgradeTest.sol", "");
+
+        GatewayEVM newImpl = GatewayEVM(proxy);
+
+        require(prevImpl.tssAddress() == newImpl.tssAddress(), "tss addr changed");
+        require(prevImpl.zetaToken() == newImpl.zetaToken(), "zeta token addr changed");
+
+        vm.stopBroadcast();
+    }
+}