Add Lemon Squeezy Billing System

packages/billing/core/src/services/billing-strategy-provider.service.ts

@@ -0,0 +1,47 @@
+import { z } from 'zod';
+
+import {
+  CancelSubscriptionParamsSchema,
+  CreateBillingCheckoutSchema,
+  CreateBillingPortalSessionSchema,
+  RetrieveCheckoutSessionSchema,
+} from '../schema';
+import { ReportBillingUsageSchema } from '../schema';
+
+export abstract class BillingStrategyProviderService {
+  abstract createBillingPortalSession(
+    params: z.infer<typeof CreateBillingPortalSessionSchema>,
+  ): Promise<{
+    url: string;
+  }>;
+
+  abstract retrieveCheckoutSession(
+    params: z.infer<typeof RetrieveCheckoutSessionSchema>,
+  ): Promise<{
+    checkoutToken: string | null;
+    status: 'complete' | 'expired' | 'open';
+    isSessionOpen: boolean;
+
+    customer: {
+      email: string | null;
+    };
+  }>;
+
+  abstract createCheckoutSession(
+    params: z.infer<typeof CreateBillingCheckoutSchema>,
+  ): Promise<{
+    checkoutToken: string;
+  }>;
+
+  abstract cancelSubscription(
+    params: z.infer<typeof CancelSubscriptionParamsSchema>,
+  ): Promise<{
+    success: boolean;
+  }>;
+
+  abstract reportUsage(
+    params: z.infer<typeof ReportBillingUsageSchema>,
+  ): Promise<{
+    success: boolean;
+  }>;
+}