user module

src/modules/user/repositories/credit-transaction.repository.ts

@@ -0,0 +1,20 @@
+import { Injectable } from '@nestjs/common';
+import { EntityManager, EntityRepository } from '@mikro-orm/postgresql';
+import { CreditTransaction } from '../entities/credit-transaction.entity';
+
+@Injectable()
+export class CreditTransactionRepository extends EntityRepository<CreditTransaction> {
+  constructor(readonly em: EntityManager) {
+    super(em, CreditTransaction);
+  }
+  async getCurrentCredit(userId: string,): Promise<number> {
+    const lastRow = await this.em.findOne(
+      CreditTransaction,
+      {
+        user: { id: userId },
+      },
+      { orderBy: { createdAt: 'desc' } },
+    );
+    return lastRow?.balance || 0;
+  }
+}