project init

apps/api/src/payments/stripe.service.ts

@@ -0,0 +1,69 @@
+import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import Stripe from 'stripe';
+
+@Injectable()
+export class StripeService {
+  private stripe: Stripe;
+
+  constructor(private configService: ConfigService) {
+    this.stripe = new Stripe(this.configService.get<string>('STRIPE_SECRET_KEY')!, {
+      apiVersion: '2023-10-16',
+    });
+  }
+
+  getClient(): Stripe {
+    return this.stripe;
+  }
+
+  async createCustomer(email: string, name?: string): Promise<Stripe.Customer> {
+    return this.stripe.customers.create({
+      email,
+      name: name || undefined,
+    });
+  }
+
+  async createCheckoutSession(params: {
+    customerId: string;
+    priceId: string;
+    successUrl: string;
+    cancelUrl: string;
+    metadata?: Record<string, string>;
+  }): Promise<Stripe.Checkout.Session> {
+    return this.stripe.checkout.sessions.create({
+      customer: params.customerId,
+      mode: 'subscription',
+      line_items: [
+        {
+          price: params.priceId,
+          quantity: 1,
+        },
+      ],
+      success_url: params.successUrl,
+      cancel_url: params.cancelUrl,
+      metadata: params.metadata,
+    });
+  }
+
+  async createPortalSession(customerId: string, returnUrl: string): Promise<Stripe.BillingPortal.Session> {
+    return this.stripe.billingPortal.sessions.create({
+      customer: customerId,
+      return_url: returnUrl,
+    });
+  }
+
+  async getSubscription(subscriptionId: string): Promise<Stripe.Subscription> {
+    return this.stripe.subscriptions.retrieve(subscriptionId);
+  }
+
+  async cancelSubscription(subscriptionId: string): Promise<Stripe.Subscription> {
+    return this.stripe.subscriptions.update(subscriptionId, {
+      cancel_at_period_end: true,
+    });
+  }
+
+  constructWebhookEvent(payload: Buffer, signature: string): Stripe.Event {
+    const webhookSecret = this.configService.get<string>('STRIPE_WEBHOOK_SECRET')!;
+    return this.stripe.webhooks.constructEvent(payload, signature, webhookSecret);
+  }
+}