Описание изменений

backend/config/default.js

@@ -0,0 +1,28 @@
+import dotenv from 'dotenv';
+dotenv.config();
+
+export default {
+  port: process.env.PORT || 3000,
+  ethereumNetwork: {
+    url: process.env.ETHEREUM_NETWORK_URL,
+    privateKey: process.env.PRIVATE_KEY
+  },
+  etherscan: {
+    apiKey: process.env.ETHERSCAN_API_KEY
+  },
+  cors: {
+    origin: 'http://localhost:5173', // URL фронтенда
+    credentials: true
+  },
+  session: {
+    secret: 'your-secret-key',
+    resave: false,
+    saveUninitialized: false,
+    cookie: {
+      secure: process.env.NODE_ENV === 'production',
+      sameSite: process.env.NODE_ENV === 'production' ? 'none' : 'lax',
+      maxAge: 24 * 60 * 60 * 1000 // 24 часа
+    }
+  }
+};
+