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import { Transaction } from '../models/Transaction';
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import { Redis } from 'ioredis';
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const redis = new Redis(process.env.REDIS_URL);
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export class PaymentService {
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  async processPayment(idempotencyKey: string, data: any) {
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    const cached = await redis.get(`pay:${idempotencyKey}`);
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    if (cached) return JSON.parse(cached);
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    const transaction = await Transaction.create(data);
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    // Complex logic...
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    await redis.set(`pay:${idempotencyKey}`, JSON.stringify(transaction), 'EX', 86400);
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    return transaction;
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  }
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}