feat(server): support lifetime subscription (#7405)

closes CLOUD-48

- [x] lifetime subscription quota
- [ ] tests

packages/backend/server/migrations/20240416042935_lifetime_subscription/migration.sql

@@ -0,0 +1,3 @@
+-- AlterTable
+ALTER TABLE "user_subscriptions" ALTER COLUMN "stripe_subscription_id" DROP NOT NULL,
+ALTER COLUMN "end" DROP NOT NULL;

packages/backend/server/schema.prisma

@@ -377,14 +377,14 @@ model UserSubscription {
   plan                 String    @db.VarChar(20)
   // yearly/monthly
   recurring            String    @db.VarChar(20)
-  // subscription.id
-  stripeSubscriptionId String    @unique @map("stripe_subscription_id")
+  // subscription.id, null for linefetime payment
+  stripeSubscriptionId String?   @unique @map("stripe_subscription_id")
   // subscription.status, active/past_due/canceled/unpaid...
   status               String    @db.VarChar(20)
   // subscription.current_period_start
   start                DateTime  @map("start") @db.Timestamptz(6)
-  // subscription.current_period_end
-  end                  DateTime  @map("end") @db.Timestamptz(6)
+  // subscription.current_period_end, null for lifetime payment
+  end                  DateTime? @map("end") @db.Timestamptz(6)
   // subscription.billing_cycle_anchor
   nextBillAt           DateTime? @map("next_bill_at") @db.Timestamptz(6)
   // subscription.canceled_at

packages/backend/server/src/core/quota/schema.ts

@@ -155,6 +155,25 @@ export const Quotas: Quota[] = [
       copilotActionLimit: 10,
     },
   },
+  {
+    feature: QuotaType.LifetimeProPlanV1,
+    type: FeatureKind.Quota,
+    version: 1,
+    configs: {
+      // quota name
+      name: 'Lifetime Pro',
+      // single blob limit 100MB
+      blobLimit: 100 * OneMB,
+      // total blob limit 1TB
+      storageQuota: 1024 * OneGB,
+      // history period of validity 30 days
+      historyPeriod: 30 * OneDay,
+      // member limit 10
+      memberLimit: 10,
+      // copilot action limit 10
+      copilotActionLimit: 10,
+    },
+  },
 ];
 
 export function getLatestQuota(type: QuotaType) {
@@ -165,6 +184,7 @@ export function getLatestQuota(type: QuotaType) {
 
 export const FreePlan = getLatestQuota(QuotaType.FreePlanV1);
 export const ProPlan = getLatestQuota(QuotaType.ProPlanV1);
+export const LifetimeProPlan = getLatestQuota(QuotaType.LifetimeProPlanV1);
 
 export const Quota_FreePlanV1_1 = {
   feature: Quotas[5].feature,

packages/backend/server/src/core/quota/service.ts

@@ -3,7 +3,6 @@ import { PrismaClient } from '@prisma/client';
 
 import type { EventPayload } from '../../fundamentals';
 import { OnEvent, PrismaTransaction } from '../../fundamentals';
-import { SubscriptionPlan } from '../../plugins/payment/types';
 import { FeatureManagementService } from '../features/management';
 import { FeatureKind } from '../features/types';
 import { QuotaConfig } from './quota';
@@ -152,15 +151,18 @@ export class QuotaService {
   async onSubscriptionUpdated({
     userId,
     plan,
+    recurring,
   }: EventPayload<'user.subscription.activated'>) {
     switch (plan) {
-      case SubscriptionPlan.AI:
+      case 'ai':
         await this.feature.addCopilot(userId, 'subscription activated');
         break;
-      case SubscriptionPlan.Pro:
+      case 'pro':
         await this.switchUserQuota(
           userId,
-          QuotaType.ProPlanV1,
+          recurring === 'lifetime'
+            ? QuotaType.LifetimeProPlanV1
+            : QuotaType.ProPlanV1,
           'subscription activated'
         );
         break;
@@ -175,16 +177,22 @@ export class QuotaService {
     plan,
   }: EventPayload<'user.subscription.canceled'>) {
     switch (plan) {
-      case SubscriptionPlan.AI:
+      case 'ai':
         await this.feature.removeCopilot(userId);
         break;
-      case SubscriptionPlan.Pro:
-        await this.switchUserQuota(
-          userId,
-          QuotaType.FreePlanV1,
-          'subscription canceled'
-        );
+      case 'pro': {
+        // edge case: when user switch from recurring Pro plan to `Lifetime` plan,
+        // a subscription canceled event will be triggered because `Lifetime` plan is not subscription based
+        const quota = await this.getUserQuota(userId);
+        if (quota.feature.name !== QuotaType.LifetimeProPlanV1) {
+          await this.switchUserQuota(
+            userId,
+            QuotaType.FreePlanV1,
+            'subscription canceled'
+          );
+        }
         break;
+      }
       default:
         break;
     }

packages/backend/server/src/core/quota/types.ts

@@ -17,6 +17,7 @@ import { ByteUnit, OneDay, OneKB } from './constant';
 export enum QuotaType {
   FreePlanV1 = 'free_plan_v1',
   ProPlanV1 = 'pro_plan_v1',
+  LifetimeProPlanV1 = 'lifetime_pro_plan_v1',
   // only for test, smaller quota
   RestrictedPlanV1 = 'restricted_plan_v1',
 }
@@ -25,6 +26,7 @@ const quotaPlan = z.object({
   feature: z.enum([
     QuotaType.FreePlanV1,
     QuotaType.ProPlanV1,
+    QuotaType.LifetimeProPlanV1,
     QuotaType.RestrictedPlanV1,
   ]),
   configs: z.object({

packages/backend/server/src/data/migrations/1719917815802-lifetime-pro-quota.ts

@@ -0,0 +1,14 @@
+import { PrismaClient } from '@prisma/client';
+
+import { QuotaType } from '../../core/quota';
+import { upsertLatestQuotaVersion } from './utils/user-quotas';
+
+export class LifetimeProQuota1719917815802 {
+  // do the migration
+  static async up(db: PrismaClient) {
+    await upsertLatestQuotaVersion(db, QuotaType.LifetimeProPlanV1);
+  }
+
+  // revert the migration
+  static async down(_db: PrismaClient) {}
+}

packages/backend/server/src/fundamentals/error/def.ts

@@ -408,6 +408,10 @@ export const USER_FRIENDLY_ERRORS = {
     args: { plan: 'string', recurring: 'string' },
     message: 'You are trying to access a unknown subscription plan.',
   },
+  cant_update_lifetime_subscription: {
+    type: 'action_forbidden',
+    message: 'You cannot update a lifetime subscription.',
+  },
 
   // Copilot errors
   copilot_session_not_found: {

packages/backend/server/src/fundamentals/error/errors.gen.ts

@@ -350,6 +350,12 @@ export class SubscriptionPlanNotFound extends UserFriendlyError {
   }
 }
 
+export class CantUpdateLifetimeSubscription extends UserFriendlyError {
+  constructor(message?: string) {
+    super('action_forbidden', 'cant_update_lifetime_subscription', message);
+  }
+}
+
 export class CopilotSessionNotFound extends UserFriendlyError {
   constructor(message?: string) {
     super('resource_not_found', 'copilot_session_not_found', message);
@@ -521,6 +527,7 @@ export enum ErrorNames {
   SAME_SUBSCRIPTION_RECURRING,
   CUSTOMER_PORTAL_CREATE_FAILED,
   SUBSCRIPTION_PLAN_NOT_FOUND,
+  CANT_UPDATE_LIFETIME_SUBSCRIPTION,
   COPILOT_SESSION_NOT_FOUND,
   COPILOT_SESSION_DELETED,
   NO_COPILOT_PROVIDER_AVAILABLE,

packages/backend/server/src/plugins/payment/resolver.ts

@@ -53,12 +53,15 @@ class SubscriptionPrice {
 
   @Field(() => Int, { nullable: true })
   yearlyAmount?: number | null;
+
+  @Field(() => Int, { nullable: true })
+  lifetimeAmount?: number | null;
 }
 
 @ObjectType('UserSubscription')
 export class UserSubscriptionType implements Partial<UserSubscription> {
-  @Field({ name: 'id' })
-  stripeSubscriptionId!: string;
+  @Field(() => String, { name: 'id', nullable: true })
+  stripeSubscriptionId!: string | null;
 
   @Field(() => SubscriptionPlan, {
     description:
@@ -75,8 +78,8 @@ export class UserSubscriptionType implements Partial<UserSubscription> {
   @Field(() => Date)
   start!: Date;
 
-  @Field(() => Date)
-  end!: Date;
+  @Field(() => Date, { nullable: true })
+  end!: Date | null;
 
   @Field(() => Date, { nullable: true })
   trialStart?: Date | null;
@@ -187,11 +190,19 @@ export class SubscriptionResolver {
 
       const monthlyPrice = prices.find(p => p.recurring?.interval === 'month');
       const yearlyPrice = prices.find(p => p.recurring?.interval === 'year');
+      const lifetimePrice = prices.find(
+        p =>
+          // asserted before
+          // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+          decodeLookupKey(p.lookup_key!)[1] === SubscriptionRecurring.Lifetime
+      );
       const currency = monthlyPrice?.currency ?? yearlyPrice?.currency ?? 'usd';
+
       return {
         currency,
         amount: monthlyPrice?.unit_amount,
         yearlyAmount: yearlyPrice?.unit_amount,
+        lifetimeAmount: lifetimePrice?.unit_amount,
       };
     }
 

packages/backend/server/src/plugins/payment/service.ts

@@ -3,7 +3,6 @@ import { randomUUID } from 'node:crypto';
 import { Injectable, Logger } from '@nestjs/common';
 import { OnEvent as RawOnEvent } from '@nestjs/event-emitter';
 import type {
-  Prisma,
   User,
   UserInvoice,
   UserStripeCustomer,
@@ -16,6 +15,7 @@ import { CurrentUser } from '../../core/auth';
 import { EarlyAccessType, FeatureManagementService } from '../../core/features';
 import {
   ActionForbidden,
+  CantUpdateLifetimeSubscription,
   Config,
   CustomerPortalCreateFailed,
   EventEmitter,
@@ -131,7 +131,11 @@ export class SubscriptionService {
       }
 
       const [plan, recurring, variant] = decodeLookupKey(price.lookup_key);
-      if (recurring === SubscriptionRecurring.Monthly) {
+      // no variant price should be used for monthly or lifetime subscription
+      if (
+        recurring === SubscriptionRecurring.Monthly ||
+        recurring === SubscriptionRecurring.Lifetime
+      ) {
         return !variant;
       }
 
@@ -184,7 +188,12 @@ export class SubscriptionService {
       },
     });
 
-    if (currentSubscription) {
+    if (
+      currentSubscription &&
+      // do not allow to re-subscribe unless the new recurring is `Lifetime`
+      (currentSubscription.recurring === recurring ||
+        recurring !== SubscriptionRecurring.Lifetime)
+    ) {
       throw new SubscriptionAlreadyExists({ plan });
     }
 
@@ -224,8 +233,19 @@ export class SubscriptionService {
         tax_id_collection: {
           enabled: true,
         },
+        // discount
         ...(discounts.length ? { discounts } : { allow_promotion_codes: true }),
-        mode: 'subscription',
+        // mode: 'subscription' or 'payment' for lifetime
+        ...(recurring === SubscriptionRecurring.Lifetime
+          ? {
+              mode: 'payment',
+              invoice_creation: {
+                enabled: true,
+              },
+            }
+          : {
+              mode: 'subscription',
+            }),
         success_url: redirectUrl,
         customer: customer.stripeCustomerId,
         customer_update: {
@@ -264,6 +284,12 @@ export class SubscriptionService {
       throw new SubscriptionNotExists({ plan });
     }
 
+    if (!subscriptionInDB.stripeSubscriptionId) {
+      throw new CantUpdateLifetimeSubscription(
+        'Lifetime subscription cannot be canceled.'
+      );
+    }
+
     if (subscriptionInDB.canceledAt) {
       throw new SubscriptionHasBeenCanceled();
     }
@@ -315,6 +341,12 @@ export class SubscriptionService {
       throw new SubscriptionNotExists({ plan });
     }
 
+    if (!subscriptionInDB.stripeSubscriptionId || !subscriptionInDB.end) {
+      throw new CantUpdateLifetimeSubscription(
+        'Lifetime subscription cannot be resumed.'
+      );
+    }
+
     if (!subscriptionInDB.canceledAt) {
       throw new SubscriptionHasBeenCanceled();
     }
@@ -368,6 +400,12 @@ export class SubscriptionService {
       throw new SubscriptionNotExists({ plan });
     }
 
+    if (!subscriptionInDB.stripeSubscriptionId) {
+      throw new CantUpdateLifetimeSubscription(
+        'Can not update lifetime subscription.'
+      );
+    }
+
     if (subscriptionInDB.canceledAt) {
       throw new SubscriptionHasBeenCanceled();
     }
@@ -422,60 +460,12 @@ export class SubscriptionService {
     }
   }
 
-  @OnStripeEvent('customer.subscription.created')
-  @OnStripeEvent('customer.subscription.updated')
-  async onSubscriptionChanges(subscription: Stripe.Subscription) {
-    subscription = await this.stripe.subscriptions.retrieve(subscription.id);
-    if (subscription.status === 'active') {
-      const user = await this.retrieveUserFromCustomer(
-        typeof subscription.customer === 'string'
-          ? subscription.customer
-          : subscription.customer.id
-      );
-
-      await this.saveSubscription(user, subscription);
-    } else {
-      await this.onSubscriptionDeleted(subscription);
-    }
-  }
-
-  @OnStripeEvent('customer.subscription.deleted')
-  async onSubscriptionDeleted(subscription: Stripe.Subscription) {
-    const user = await this.retrieveUserFromCustomer(
-      typeof subscription.customer === 'string'
-        ? subscription.customer
-        : subscription.customer.id
-    );
-
-    const [plan] = this.decodePlanFromSubscription(subscription);
-    this.event.emit('user.subscription.canceled', {
-      userId: user.id,
-      plan,
-    });
-
-    await this.db.userSubscription.deleteMany({
-      where: {
-        stripeSubscriptionId: subscription.id,
-      },
-    });
-  }
-
-  @OnStripeEvent('invoice.paid')
-  async onInvoicePaid(stripeInvoice: Stripe.Invoice) {
-    stripeInvoice = await this.stripe.invoices.retrieve(stripeInvoice.id);
-    await this.saveInvoice(stripeInvoice);
-
-    const line = stripeInvoice.lines.data[0];
-
-    if (!line.price || line.price.type !== 'recurring') {
-      throw new Error('Unknown invoice with no recurring price');
-    }
-  }
-
   @OnStripeEvent('invoice.created')
+  @OnStripeEvent('invoice.updated')
   @OnStripeEvent('invoice.finalization_failed')
   @OnStripeEvent('invoice.payment_failed')
-  async saveInvoice(stripeInvoice: Stripe.Invoice) {
+  @OnStripeEvent('invoice.payment_succeeded')
+  async saveInvoice(stripeInvoice: Stripe.Invoice, event: string) {
     stripeInvoice = await this.stripe.invoices.retrieve(stripeInvoice.id);
     if (!stripeInvoice.customer) {
       throw new Error('Unexpected invoice with no customer');
@@ -487,12 +477,6 @@ export class SubscriptionService {
         : stripeInvoice.customer.id
     );
 
-    const invoice = await this.db.userInvoice.findUnique({
-      where: {
-        stripeInvoiceId: stripeInvoice.id,
-      },
-    });
-
     const data: Partial<UserInvoice> = {
       currency: stripeInvoice.currency,
       amount: stripeInvoice.total,
@@ -524,39 +508,135 @@ export class SubscriptionService {
       }
     }
 
-    // update invoice
-    if (invoice) {
-      await this.db.userInvoice.update({
-        where: {
-          stripeInvoiceId: stripeInvoice.id,
+    // create invoice
+    const price = stripeInvoice.lines.data[0].price;
+
+    if (!price) {
+      throw new Error('Unexpected invoice with no price');
+    }
+
+    if (!price.lookup_key) {
+      throw new Error('Unexpected subscription with no key');
+    }
+
+    const [plan, recurring] = decodeLookupKey(price.lookup_key);
+
+    const invoice = await this.db.userInvoice.upsert({
+      where: {
+        stripeInvoiceId: stripeInvoice.id,
+      },
+      update: data,
+      create: {
+        userId: user.id,
+        stripeInvoiceId: stripeInvoice.id,
+        plan,
+        recurring,
+        reason: stripeInvoice.billing_reason ?? 'contact support',
+        ...(data as any),
+      },
+    });
+
+    // handle one time payment, no subscription created by stripe
+    if (
+      event === 'invoice.payment_succeeded' &&
+      recurring === SubscriptionRecurring.Lifetime &&
+      stripeInvoice.status === 'paid'
+    ) {
+      await this.saveLifetimeSubscription(user, invoice);
+    }
+  }
+
+  async saveLifetimeSubscription(user: User, invoice: UserInvoice) {
+    // cancel previous non-lifetime subscription
+    const savedSubscription = await this.db.userSubscription.findUnique({
+      where: {
+        userId_plan: {
+          userId: user.id,
+          plan: SubscriptionPlan.Pro,
+        },
+      },
+    });
+
+    if (savedSubscription && savedSubscription.stripeSubscriptionId) {
+      await this.db.userSubscription.update({
+        where: {
+          id: savedSubscription.id,
+        },
+        data: {
+          stripeScheduleId: null,
+          stripeSubscriptionId: null,
+          status: SubscriptionStatus.Active,
+          recurring: SubscriptionRecurring.Lifetime,
+          end: null,
         },
-        data,
       });
+
+      await this.stripe.subscriptions.cancel(
+        savedSubscription.stripeSubscriptionId,
+        {
+          prorate: true,
+        }
+      );
     } else {
-      // create invoice
-      const price = stripeInvoice.lines.data[0].price;
-
-      if (!price || price.type !== 'recurring') {
-        throw new Error('Unexpected invoice with no recurring price');
-      }
-
-      if (!price.lookup_key) {
-        throw new Error('Unexpected subscription with no key');
-      }
-
-      const [plan, recurring] = decodeLookupKey(price.lookup_key);
-
-      await this.db.userInvoice.create({
+      await this.db.userSubscription.create({
         data: {
           userId: user.id,
-          stripeInvoiceId: stripeInvoice.id,
-          plan,
-          recurring,
-          reason: stripeInvoice.billing_reason ?? 'contact support',
-          ...(data as any),
+          stripeSubscriptionId: null,
+          plan: invoice.plan,
+          recurring: invoice.recurring,
+          end: null,
+          start: new Date(),
+          status: SubscriptionStatus.Active,
+          nextBillAt: null,
         },
       });
     }
+
+    this.event.emit('user.subscription.activated', {
+      userId: user.id,
+      plan: invoice.plan as SubscriptionPlan,
+      recurring: SubscriptionRecurring.Lifetime,
+    });
+  }
+
+  @OnStripeEvent('customer.subscription.created')
+  @OnStripeEvent('customer.subscription.updated')
+  async onSubscriptionChanges(subscription: Stripe.Subscription) {
+    subscription = await this.stripe.subscriptions.retrieve(subscription.id);
+    if (subscription.status === 'active') {
+      const user = await this.retrieveUserFromCustomer(
+        typeof subscription.customer === 'string'
+          ? subscription.customer
+          : subscription.customer.id
+      );
+
+      await this.saveSubscription(user, subscription);
+    } else {
+      await this.onSubscriptionDeleted(subscription);
+    }
+  }
+
+  @OnStripeEvent('customer.subscription.deleted')
+  async onSubscriptionDeleted(subscription: Stripe.Subscription) {
+    const user = await this.retrieveUserFromCustomer(
+      typeof subscription.customer === 'string'
+        ? subscription.customer
+        : subscription.customer.id
+    );
+
+    const [plan, recurring] = this.decodePlanFromSubscription(subscription);
+
+    this.event.emit('user.subscription.canceled', {
+      userId: user.id,
+      plan,
+      recurring,
+    });
+
+    await this.db.userSubscription.deleteMany({
+      where: {
+        stripeSubscriptionId: subscription.id,
+      },
+    });
   }
 
   private async saveSubscription(
@@ -576,6 +656,7 @@ export class SubscriptionService {
     this.event.emit('user.subscription.activated', {
       userId: user.id,
       plan,
+      recurring,
     });
 
     let nextBillAt: Date | null = null;
@@ -600,44 +681,21 @@ export class SubscriptionService {
         : null,
       stripeSubscriptionId: subscription.id,
       plan,
-      recurring,
       status: subscription.status,
       stripeScheduleId: subscription.schedule as string | null,
     };
 
-    const currentSubscription = await this.db.userSubscription.findUnique({
+    return await this.db.userSubscription.upsert({
       where: {
-        userId_plan: {
-          userId: user.id,
-          plan,
-        },
+        stripeSubscriptionId: subscription.id,
+      },
+      update: commonData,
+      create: {
+        userId: user.id,
+        recurring,
+        ...commonData,
       },
     });
-
-    if (currentSubscription) {
-      const update: Prisma.UserSubscriptionUpdateInput = {
-        ...commonData,
-      };
-
-      // a schedule exists, update the recurring to scheduled one
-      if (update.stripeScheduleId) {
-        delete update.recurring;
-      }
-
-      return await this.db.userSubscription.update({
-        where: {
-          id: currentSubscription.id,
-        },
-        data: update,
-      });
-    } else {
-      return await this.db.userSubscription.create({
-        data: {
-          userId: user.id,
-          ...commonData,
-        },
-      });
-    }
   }
 
   private async getOrCreateCustomer(

packages/backend/server/src/plugins/payment/types.ts

@@ -5,6 +5,7 @@ import type { Payload } from '../../fundamentals/event/def';
 export enum SubscriptionRecurring {
   Monthly = 'monthly',
   Yearly = 'yearly',
+  Lifetime = 'lifetime',
 }
 
 export enum SubscriptionPlan {
@@ -46,10 +47,12 @@ declare module '../../fundamentals/event/def' {
       activated: Payload<{
         userId: User['id'];
         plan: SubscriptionPlan;
+        recurring: SubscriptionRecurring;
       }>;
       canceled: Payload<{
         userId: User['id'];
         plan: SubscriptionPlan;
+        recurring: SubscriptionRecurring;
       }>;
     };
   }

packages/backend/server/src/plugins/payment/webhook.ts

@@ -45,9 +45,16 @@ export class StripeWebhook {
       setImmediate(() => {
         // handle duplicated events?
         // see https://stripe.com/docs/webhooks#handle-duplicate-events
-        this.event.emitAsync(event.type, event.data.object).catch(e => {
-          this.logger.error('Failed to handle Stripe Webhook event.', e);
-        });
+        this.event
+          .emitAsync(
+            event.type,
+            event.data.object,
+            // here to let event listeners know what exactly the event is if a handler can handle multiple events
+            event.type
+          )
+          .catch(e => {
+            this.logger.error('Failed to handle Stripe Webhook event.', e);
+          });
       });
     } catch (err: any) {
       throw new InternalServerError(err.message);

packages/backend/server/src/schema.gql

@@ -189,6 +189,7 @@ enum ErrorNames {
   BLOB_NOT_FOUND
   BLOB_QUOTA_EXCEEDED
   CANT_CHANGE_WORKSPACE_OWNER
+  CANT_UPDATE_LIFETIME_SUBSCRIPTION
   COPILOT_ACTION_TAKEN
   COPILOT_FAILED_TO_CREATE_MESSAGE
   COPILOT_FAILED_TO_GENERATE_TEXT
@@ -657,12 +658,14 @@ type SubscriptionPlanNotFoundDataType {
 type SubscriptionPrice {
   amount: Int
   currency: String!
+  lifetimeAmount: Int
   plan: SubscriptionPlan!
   type: String!
   yearlyAmount: Int
 }
 
 enum SubscriptionRecurring {
+  Lifetime
   Monthly
   Yearly
 }
@@ -733,8 +736,8 @@ type UserQuotaHumanReadable {
 type UserSubscription {
   canceledAt: DateTime
   createdAt: DateTime!
-  end: DateTime!
-  id: String!
+  end: DateTime
+  id: String
   nextBillAt: DateTime
 
   """

packages/backend/server/tests/payment/service.spec.ts

@@ -84,6 +84,7 @@ test.afterEach.always(async t => {
 
 const PRO_MONTHLY = `${SubscriptionPlan.Pro}_${SubscriptionRecurring.Monthly}`;
 const PRO_YEARLY = `${SubscriptionPlan.Pro}_${SubscriptionRecurring.Yearly}`;
+const PRO_LIFETIME = `${SubscriptionPlan.Pro}_${SubscriptionRecurring.Lifetime}`;
 const PRO_EA_YEARLY = `${SubscriptionPlan.Pro}_${SubscriptionRecurring.Yearly}_${SubscriptionPriceVariant.EA}`;
 const AI_YEARLY = `${SubscriptionPlan.AI}_${SubscriptionRecurring.Yearly}`;
 const AI_YEARLY_EA = `${SubscriptionPlan.AI}_${SubscriptionRecurring.Yearly}_${SubscriptionPriceVariant.EA}`;
@@ -105,6 +106,11 @@ const PRICES = {
     currency: 'usd',
     lookup_key: PRO_YEARLY,
   },
+  [PRO_LIFETIME]: {
+    unit_amount: 49900,
+    currency: 'usd',
+    lookup_key: PRO_LIFETIME,
+  },
   [PRO_EA_YEARLY]: {
     recurring: {
       interval: 'year',
@@ -170,10 +176,9 @@ test('should list normal price for unauthenticated user', async t => {
 
   const prices = await service.listPrices();
 
-  t.is(prices.length, 3);
   t.deepEqual(
     new Set(prices.map(p => p.lookup_key)),
-    new Set([PRO_MONTHLY, PRO_YEARLY, AI_YEARLY])
+    new Set([PRO_MONTHLY, PRO_YEARLY, PRO_LIFETIME, AI_YEARLY])
   );
 });
 
@@ -190,10 +195,9 @@ test('should list normal prices for authenticated user', async t => {
 
   const prices = await service.listPrices(u1);
 
-  t.is(prices.length, 3);
   t.deepEqual(
     new Set(prices.map(p => p.lookup_key)),
-    new Set([PRO_MONTHLY, PRO_YEARLY, AI_YEARLY])
+    new Set([PRO_MONTHLY, PRO_YEARLY, PRO_LIFETIME, AI_YEARLY])
   );
 });
 
@@ -210,10 +214,9 @@ test('should list early access prices for pro ea user', async t => {
 
   const prices = await service.listPrices(u1);
 
-  t.is(prices.length, 3);
   t.deepEqual(
     new Set(prices.map(p => p.lookup_key)),
-    new Set([PRO_MONTHLY, PRO_EA_YEARLY, AI_YEARLY])
+    new Set([PRO_MONTHLY, PRO_LIFETIME, PRO_EA_YEARLY, AI_YEARLY])
   );
 });
 
@@ -246,10 +249,9 @@ test('should list normal prices for pro ea user with old subscriptions', async t
 
   const prices = await service.listPrices(u1);
 
-  t.is(prices.length, 3);
   t.deepEqual(
     new Set(prices.map(p => p.lookup_key)),
-    new Set([PRO_MONTHLY, PRO_YEARLY, AI_YEARLY])
+    new Set([PRO_MONTHLY, PRO_YEARLY, PRO_LIFETIME, AI_YEARLY])
   );
 });
 
@@ -266,10 +268,9 @@ test('should list early access prices for ai ea user', async t => {
 
   const prices = await service.listPrices(u1);
 
-  t.is(prices.length, 3);
   t.deepEqual(
     new Set(prices.map(p => p.lookup_key)),
-    new Set([PRO_MONTHLY, PRO_YEARLY, AI_YEARLY_EA])
+    new Set([PRO_MONTHLY, PRO_YEARLY, PRO_LIFETIME, AI_YEARLY_EA])
   );
 });
 
@@ -286,10 +287,9 @@ test('should list early access prices for pro and ai ea user', async t => {
 
   const prices = await service.listPrices(u1);
 
-  t.is(prices.length, 3);
   t.deepEqual(
     new Set(prices.map(p => p.lookup_key)),
-    new Set([PRO_MONTHLY, PRO_EA_YEARLY, AI_YEARLY_EA])
+    new Set([PRO_MONTHLY, PRO_LIFETIME, PRO_EA_YEARLY, AI_YEARLY_EA])
   );
 });
 
@@ -322,10 +322,9 @@ test('should list normal prices for ai ea user with old subscriptions', async t
 
   const prices = await service.listPrices(u1);
 
-  t.is(prices.length, 3);
   t.deepEqual(
     new Set(prices.map(p => p.lookup_key)),
-    new Set([PRO_MONTHLY, PRO_YEARLY, AI_YEARLY])
+    new Set([PRO_MONTHLY, PRO_YEARLY, PRO_LIFETIME, AI_YEARLY])
   );
 });
 
@@ -458,6 +457,22 @@ test('should get correct pro plan price for checking out', async t => {
       coupon: undefined,
     });
   }
+
+  // any user, lifetime recurring
+  {
+    feature.isEarlyAccessUser.resolves(false);
+    // @ts-expect-error stub
+    subListStub.resolves({ data: [] });
+    const ret = await getAvailablePrice(
+      customer,
+      SubscriptionPlan.Pro,
+      SubscriptionRecurring.Lifetime
+    );
+    t.deepEqual(ret, {
+      price: PRO_LIFETIME,
+      coupon: undefined,
+    });
+  }
 });
 
 test('should get correct ai plan price for checking out', async t => {
@@ -639,6 +654,7 @@ test('should be able to create subscription', async t => {
     emitStub.calledOnceWith('user.subscription.activated', {
       userId: u1.id,
       plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Monthly,
     })
   );
 
@@ -674,6 +690,7 @@ test('should be able to update subscription', async t => {
     emitStub.calledOnceWith('user.subscription.activated', {
       userId: u1.id,
       plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Monthly,
     })
   );
 
@@ -706,6 +723,7 @@ test('should be able to delete subscription', async t => {
     emitStub.calledOnceWith('user.subscription.canceled', {
       userId: u1.id,
       plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Monthly,
     })
   );
 
@@ -749,6 +767,7 @@ test('should be able to cancel subscription', async t => {
     emitStub.calledOnceWith('user.subscription.activated', {
       userId: u1.id,
       plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Monthly,
     })
   );
 
@@ -785,6 +804,7 @@ test('should be able to resume subscription', async t => {
     emitStub.calledOnceWith('user.subscription.activated', {
       userId: u1.id,
       plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Monthly,
     })
   );
 
@@ -929,3 +949,120 @@ test('should operate with latest subscription status', async t => {
   t.deepEqual(stub.firstCall.args[1], sub);
   t.deepEqual(stub.secondCall.args[1], sub);
 });
+
+// ============== Lifetime Subscription ===============
+const invoice: Stripe.Invoice = {
+  id: 'in_xxx',
+  object: 'invoice',
+  amount_paid: 49900,
+  total: 49900,
+  customer: 'cus_1',
+  currency: 'usd',
+  status: 'paid',
+  lines: {
+    data: [
+      {
+        // @ts-expect-error stub
+        price: PRICES[PRO_LIFETIME],
+      },
+    ],
+  },
+};
+
+test('should be able to subscribe to lifetime recurring', async t => {
+  // lifetime payment isn't a subscription, so we need to trigger the creation by invoice payment event
+  const { service, stripe, db, u1, event } = t.context;
+
+  const emitStub = Sinon.stub(event, 'emit');
+  Sinon.stub(stripe.invoices, 'retrieve').resolves(invoice as any);
+  await service.saveInvoice(invoice, 'invoice.payment_succeeded');
+
+  const subInDB = await db.userSubscription.findFirst({
+    where: { userId: u1.id },
+  });
+
+  t.true(
+    emitStub.calledOnceWith('user.subscription.activated', {
+      userId: u1.id,
+      plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Lifetime,
+    })
+  );
+  t.is(subInDB?.plan, SubscriptionPlan.Pro);
+  t.is(subInDB?.recurring, SubscriptionRecurring.Lifetime);
+  t.is(subInDB?.status, SubscriptionStatus.Active);
+  t.is(subInDB?.stripeSubscriptionId, null);
+});
+
+test('should be able to subscribe to lifetime recurring with old subscription', async t => {
+  const { service, stripe, db, u1, event } = t.context;
+
+  await db.userSubscription.create({
+    data: {
+      userId: u1.id,
+      stripeSubscriptionId: 'sub_1',
+      plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Monthly,
+      status: SubscriptionStatus.Active,
+      start: new Date(),
+      end: new Date(),
+    },
+  });
+
+  const emitStub = Sinon.stub(event, 'emit');
+  Sinon.stub(stripe.invoices, 'retrieve').resolves(invoice as any);
+  Sinon.stub(stripe.subscriptions, 'cancel').resolves(sub as any);
+  await service.saveInvoice(invoice, 'invoice.payment_succeeded');
+
+  const subInDB = await db.userSubscription.findFirst({
+    where: { userId: u1.id },
+  });
+
+  t.true(
+    emitStub.calledOnceWith('user.subscription.activated', {
+      userId: u1.id,
+      plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Lifetime,
+    })
+  );
+  t.is(subInDB?.plan, SubscriptionPlan.Pro);
+  t.is(subInDB?.recurring, SubscriptionRecurring.Lifetime);
+  t.is(subInDB?.status, SubscriptionStatus.Active);
+  t.is(subInDB?.stripeSubscriptionId, null);
+});
+
+test('should not be able to update lifetime recurring', async t => {
+  const { service, db, u1 } = t.context;
+
+  await db.userSubscription.create({
+    data: {
+      userId: u1.id,
+      plan: SubscriptionPlan.Pro,
+      recurring: SubscriptionRecurring.Lifetime,
+      status: SubscriptionStatus.Active,
+      start: new Date(),
+      end: new Date(),
+    },
+  });
+
+  await t.throwsAsync(
+    () => service.cancelSubscription('', u1.id, SubscriptionPlan.Pro),
+    { message: 'Lifetime subscription cannot be canceled.' }
+  );
+
+  await t.throwsAsync(
+    () =>
+      service.updateSubscriptionRecurring(
+        '',
+        u1.id,
+        SubscriptionPlan.Pro,
+        SubscriptionRecurring.Monthly
+      ),
+    { message: 'Can not update lifetime subscription.' }
+  );
+
+  await t.throwsAsync(
+    () => service.resumeCanceledSubscription('', u1.id, SubscriptionPlan.Pro),
+    { message: 'Lifetime subscription cannot be resumed.' }
+  );
+});

packages/frontend/core/src/components/affine/setting-modal/general-setting/billing/index.tsx

@@ -38,6 +38,7 @@ enum DescriptionI18NKey {
   Basic = 'com.affine.payment.billing-setting.current-plan.description',
   Monthly = 'com.affine.payment.billing-setting.current-plan.description.monthly',
   Yearly = 'com.affine.payment.billing-setting.current-plan.description.yearly',
+  Lifetime = 'com.affine.payment.billing-setting.current-plan.description.lifetime',
 }
 
 const INVOICE_PAGE_SIZE = 12;
@@ -204,7 +205,7 @@ const SubscriptionSettings = () => {
                 })}
               />
             )}
-            {proSubscription.canceledAt ? (
+            {proSubscription.end && proSubscription.canceledAt ? (
               <SettingRow
                 name={t['com.affine.payment.billing-setting.expiration-date']()}
                 desc={t[

packages/frontend/graphql/src/schema.ts

@@ -259,6 +259,7 @@ export enum ErrorNames {
   BLOB_NOT_FOUND = 'BLOB_NOT_FOUND',
   BLOB_QUOTA_EXCEEDED = 'BLOB_QUOTA_EXCEEDED',
   CANT_CHANGE_WORKSPACE_OWNER = 'CANT_CHANGE_WORKSPACE_OWNER',
+  CANT_UPDATE_LIFETIME_SUBSCRIPTION = 'CANT_UPDATE_LIFETIME_SUBSCRIPTION',
   COPILOT_ACTION_TAKEN = 'COPILOT_ACTION_TAKEN',
   COPILOT_FAILED_TO_CREATE_MESSAGE = 'COPILOT_FAILED_TO_CREATE_MESSAGE',
   COPILOT_FAILED_TO_GENERATE_TEXT = 'COPILOT_FAILED_TO_GENERATE_TEXT',
@@ -950,12 +951,14 @@ export interface SubscriptionPrice {
   __typename?: 'SubscriptionPrice';
   amount: Maybe<Scalars['Int']['output']>;
   currency: Scalars['String']['output'];
+  lifetimeAmount: Maybe<Scalars['Int']['output']>;
   plan: SubscriptionPlan;
   type: Scalars['String']['output'];
   yearlyAmount: Maybe<Scalars['Int']['output']>;
 }
 
 export enum SubscriptionRecurring {
+  Lifetime = 'Lifetime',
   Monthly = 'Monthly',
   Yearly = 'Yearly',
 }
@@ -1027,8 +1030,8 @@ export interface UserSubscription {
   __typename?: 'UserSubscription';
   canceledAt: Maybe<Scalars['DateTime']['output']>;
   createdAt: Scalars['DateTime']['output'];
-  end: Scalars['DateTime']['output'];
-  id: Scalars['String']['output'];
+  end: Maybe<Scalars['DateTime']['output']>;
+  id: Maybe<Scalars['String']['output']>;
   nextBillAt: Maybe<Scalars['DateTime']['output']>;
   /**
    * The 'Free' plan just exists to be a placeholder and for the type convenience of frontend.
@@ -1213,7 +1216,7 @@ export type CancelSubscriptionMutation = {
   __typename?: 'Mutation';
   cancelSubscription: {
     __typename?: 'UserSubscription';
-    id: string;
+    id: string | null;
     status: SubscriptionStatus;
     nextBillAt: string | null;
     canceledAt: string | null;
@@ -1347,7 +1350,7 @@ export type EarlyAccessUsersQuery = {
       recurring: SubscriptionRecurring;
       status: SubscriptionStatus;
       start: string;
-      end: string;
+      end: string | null;
     } | null;
   }>;
 };
@@ -1834,11 +1837,11 @@ export type ResumeSubscriptionMutation = {
   __typename?: 'Mutation';
   resumeSubscription: {
     __typename?: 'UserSubscription';
-    id: string;
+    id: string | null;
     status: SubscriptionStatus;
     nextBillAt: string | null;
     start: string;
-    end: string;
+    end: string | null;
   };
 };
 
@@ -1955,12 +1958,12 @@ export type SubscriptionQuery = {
     id: string;
     subscriptions: Array<{
       __typename?: 'UserSubscription';
-      id: string;
+      id: string | null;
       status: SubscriptionStatus;
       plan: SubscriptionPlan;
       recurring: SubscriptionRecurring;
       start: string;
-      end: string;
+      end: string | null;
       nextBillAt: string | null;
       canceledAt: string | null;
     }>;
@@ -1990,7 +1993,7 @@ export type UpdateSubscriptionMutation = {
   __typename?: 'Mutation';
   updateSubscriptionRecurring: {
     __typename?: 'UserSubscription';
-    id: string;
+    id: string | null;
     plan: SubscriptionPlan;
     recurring: SubscriptionRecurring;
     nextBillAt: string | null;

packages/frontend/i18n/src/resources/en.json

@@ -941,6 +941,7 @@
   "com.affine.payment.billing-setting.current-plan.description": "You are currently on the <1>{{planName}} plan</1>.",
   "com.affine.payment.billing-setting.current-plan.description.monthly": "You are currently on the monthly <1>{{planName}} plan</1>.",
   "com.affine.payment.billing-setting.current-plan.description.yearly": "You are currently on the yearly <1>{{planName}} plan</1>.",
+  "com.affine.payment.billing-setting.current-plan.description.lifetime": "You are currently on the believer <1>{{planName}} plan</1>.",
   "com.affine.payment.billing-setting.expiration-date": "Expiration Date",
   "com.affine.payment.billing-setting.expiration-date.description": "Your subscription is valid until {{expirationDate}}",
   "com.affine.payment.billing-setting.history": "Billing history",