Initial code commit.

backend/src/database.ts

@@ -0,0 +1,26 @@
+const config = require('../mempool-config.json');
+import { createPool } from 'mysql2/promise';
+
+export class DB {
+  static pool = createPool({
+    host: config.DB_HOST,
+    port: config.DB_PORT,
+    database: config.DB_DATABASE,
+    user: config.DB_USER,
+    password: config.DB_PASSWORD,
+    connectionLimit: 10,
+    supportBigNumbers: true,
+  });
+}
+
+export async function checkDbConnection() {
+  try {
+    const connection = await DB.pool.getConnection();
+    console.log('MySQL connection established.');
+    connection.release();
+  } catch (e) {
+    console.log('Could not connect to MySQL.');
+    console.log(e);
+    process.exit(1);
+  }
+}