Hardhat3

eth/.gitignore

@@ -18,3 +18,7 @@ ignition/deployments/chain-31337
 
 # Local hardhat test-run deployment records — ephemeral addresses, no on-chain value
 scripts/deployments/*-hardhat-*.json
+deployments/*-default*.json
+deployments/*-undefined*.json
+scripts/deployments/*-default*.json
+scripts/deployments/*-undefined*.json

eth/contracts/ERC1967Proxy.sol

@@ -1,6 +1,9 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.27;
 
-import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
+import {ERC1967Proxy as OZErc1967Proxy} from "@openzeppelin/contracts/proxy/ERC1967/ERC1967Proxy.sol";
 
-// Diese Datei exportiert einfach den OpenZeppelin ERC1967Proxy für die Verwendung in unserem Projekt
+// Expose ERC1967Proxy as a named project artifact for tests that deploy proxies manually.
+contract ERC1967Proxy is OZErc1967Proxy {
+    constructor(address implementation, bytes memory _data) OZErc1967Proxy(implementation, _data) {}
+}

eth/deployments/support-v2-default.json

@@ -0,0 +1,8 @@
+{
+  "network": "default",
+  "proxyAddress": "0xc0F115A19107322cFBf1cDBC7ea011C19EbDB4F8",
+  "implementationAddress": "0x4631BCAbD6dF18D94796344963cB60d44a4136b6",
+  "owner": "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266",
+  "deployedAt": "2026-05-30T08:19:03.459Z",
+  "version": "1.0.0-test"
+}

eth/hardhat.config.ts

@@ -1,19 +1,12 @@
-import "@nomicfoundation/hardhat-toolbox-viem";
-import "@nomicfoundation/hardhat-verify";
-import "hardhat-abi-exporter";
-import "@openzeppelin/hardhat-upgrades";
-import { vars } from "hardhat/config";
+import { defineConfig, configVariable } from "hardhat/config";
+import hardhatToolboxViem from "@nomicfoundation/hardhat-toolbox-viem";
+import hardhatUpgrades from "@openzeppelin/hardhat-upgrades";
+import hardhatAbiExporter from "@solidstate/hardhat-abi-exporter";
+import hardhatEthersChaiMatchers from "@nomicfoundation/hardhat-ethers-chai-matchers";
 
-// Use default values for CI/testing if environment variables are not set
-const ALCHEMY_API_KEY: string = vars.get("ALCHEMY_API_KEY", "dummy-key-for-testing");
-const SEPOLIA_PRIVATE_KEY: string = vars.get(
-  "SEPOLIA_PRIVATE_KEY",
-  "0x1234567890123456789012345678901234567890123456789012345678901234",
-);
-// V2 API uses single Etherscan key for all chains (including Optimism, Base, Polygon, etc.)
-const ETHERSCAN_API_KEY: string = vars.get("ETHERSCAN_API_KEY", "dummy-etherscan-key");
-
-const config = {
+export default defineConfig({
+  defaultNetwork: "hardhat",
+  plugins: [hardhatToolboxViem, hardhatUpgrades, hardhatAbiExporter, hardhatEthersChaiMatchers],
   solidity: {
     compilers: [
       {
@@ -24,33 +17,39 @@ const config = {
       },
     ],
   },
-  gasReporter: {
-    enabled: false,
-  },
   networks: {
+    hardhat: {
+      type: "edr-simulated",
+    },
     sepolia: {
-      url: `https://eth-sepolia.g.alchemy.com/v2/${ALCHEMY_API_KEY}`,
-      accounts: [SEPOLIA_PRIVATE_KEY],
+      type: "http",
+      url: configVariable("ALCHEMY_API_KEY", "https://eth-sepolia.g.alchemy.com/v2/{variable}"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
     },
     optsepolia: {
-      url: `https://opt-sepolia.g.alchemy.com/v2/${ALCHEMY_API_KEY}`,
-      accounts: [SEPOLIA_PRIVATE_KEY],
+      type: "http",
+      url: configVariable("ALCHEMY_API_KEY", "https://opt-sepolia.g.alchemy.com/v2/{variable}"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
     },
     optimisticEthereum: {
-      url: `https://opt-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}`,
-      accounts: [SEPOLIA_PRIVATE_KEY],
+      type: "http",
+      url: configVariable("ALCHEMY_API_KEY", "https://opt-mainnet.g.alchemy.com/v2/{variable}"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
     },
     baseSepolia: {
-      url: `https://base-sepolia.g.alchemy.com/v2/${ALCHEMY_API_KEY}`,
-      accounts: [SEPOLIA_PRIVATE_KEY],
+      type: "http",
+      url: configVariable("ALCHEMY_API_KEY", "https://base-sepolia.g.alchemy.com/v2/{variable}"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
     },
     base: {
-      url: `https://base-mainnet.g.alchemy.com/v2/${ALCHEMY_API_KEY}`,
-      accounts: [SEPOLIA_PRIVATE_KEY],
+      type: "http",
+      url: configVariable("ALCHEMY_API_KEY", "https://base-mainnet.g.alchemy.com/v2/{variable}"),
+      accounts: [configVariable("SEPOLIA_PRIVATE_KEY")],
     },
   },
   etherscan: {
-    apiKey: ETHERSCAN_API_KEY, // V2 API uses single Etherscan key for all chains
+    // V2 API uses single Etherscan key for all chains (including Optimism, Base, Polygon, etc.)
+    apiKey: configVariable("ETHERSCAN_API_KEY"),
     customChains: [
       {
         network: "optsepolia",
@@ -86,6 +85,4 @@ const config = {
       },
     ],
   },
-};
-
-export default config;
+});