feat: add foreign key constraints and metrics for blockchain node

packages/solidity/aitbc-token/hardhat.config.ts

@@ -0,0 +1,28 @@
+import { HardhatUserConfig } from "hardhat/config";
+import "@nomicfoundation/hardhat-toolbox";
+
+const config: HardhatUserConfig = {
+  solidity: {
+    version: "0.8.24",
+    settings: {
+      optimizer: {
+        enabled: true,
+        runs: 200
+      }
+    }
+  },
+  paths: {
+    sources: "contracts",
+    tests: "test",
+    cache: "cache",
+    artifacts: "artifacts"
+  },
+  networks: {
+    hardhat: {},
+    localhost: {
+      url: "http://127.0.0.1:8545"
+    }
+  }
+};
+
+export default config;