make contracts upgradeable

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "lib/openzeppelin-contracts"]
 	path = lib/openzeppelin-contracts
 	url = https://github.com/OpenZeppelin/openzeppelin-contracts
+[submodule "lib/openzeppelin-contracts-upgradeable"]
+	path = lib/openzeppelin-contracts-upgradeable
+	url = https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable

foundry.toml

@@ -2,5 +2,9 @@
 src = "src"
 out = "out"
 libs = ["lib"]
+ffi = true
+ast = true
+build_info = true
+extra_output = ["storageLayout"]
 
 # See more config options https://github.com/foundry-rs/foundry/blob/master/crates/config/README.md#all-options

remappings.txt

@@ -1 +1,2 @@
-@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/
+@openzeppelin/contracts/=lib/openzeppelin-contracts-upgradeable/lib/openzeppelin-contracts/contracts/
+@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/

script/RaidGeld.s.sol

@@ -3,15 +3,28 @@ pragma solidity ^0.8.13;
 
 import {Script, console} from "forge-std/Script.sol";
 import {RaidGeld} from "../src/RaidGeld.sol";
+import {Upgrades} from "openzeppelin-foundry-upgrades/Upgrades.sol";
 
 contract RaidGeldScript is Script {
-    RaidGeld public raidgeld;
-
     function setUp() public {}
 
     function run() public {
         vm.startBroadcast();
-        raidgeld = new RaidGeld();
+
+        // Deploy the upgradeable contract
+        address _proxyAddress = Upgrades.deployTransparentProxy(
+            "RaidGeld.sol",
+            msg.sender,
+            abi.encodeCall(RaidGeld.initialize, (msg.sender))
+        );
+
+        // Get the implementation address
+        address implementationAddress = Upgrades.getImplementationAddress(
+            _proxyAddress
+        );
+
         vm.stopBroadcast();
+
+        return (implementationAddress, _proxyAddress);
     }
 }

src/RaidGeld.sol

@@ -1,12 +1,13 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.13;
 
-import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
-import "@openzeppelin/contracts/access/Ownable.sol";
+import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
+import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
 import {RaidGeldUtils} from "../src/RaidGeldUtils.sol";
 import {Army, Player, Raider} from "../src/RaidGeldStructs.sol";
 
-contract RaidGeld is ERC20, Ownable {
+contract RaidGeld is Initializable, ERC20Upgradeable, OwnableUpgradeable {
     uint256 public constant MANTISSA = 1e4;
 
     uint256 public constant BUY_IN_AMOUNT = 0.00005 ether;
@@ -21,7 +22,10 @@ contract RaidGeld is ERC20, Ownable {
         _;
     }
 
-    constructor() ERC20("Raid Geld", "GELD") Ownable(msg.sender) {}
+    function initialize() public initializer {
+        __ERC20_init("Raid Geld", "GELD");
+        __Ownable_init();
+    }
 
     // This effectively registers the user
     function register() external payable {