The TypeScript Payments SDK enables you to subscribe users without requiring a particular frontend framework.

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Getting Started

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1. Install the SDK

Install the SDK with your preferred package manager. 
npm install @microapp-io/payments

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2. Import and Initialize the Payments SDK

To use the Payments SDK in your code, import it in any file where you need to use it. 
import { Payments } from '@microapp-io/payments';

const payments = new Payments();
For local development, we recommend using the sandbox feature on the Payments class to return mocked subscriptions: 
import { Payments, MicroappSubscriptionPlanCycle } from '@microapp-io/payments';

const payments = new Payments({
  sandbox: {
    enabled: process.env.NODE_ENV !== 'production',
    subscription: () => ({
      id: 'some-subscription-id',
      appId: 'some-app-id',
      user: {
        id: 'some-user-id',
        email: '[email protected]',
        name: 'FirstName LastName',
      },
      active: true,
      subscriptionPlan: {
        id: 'some-subscription-plan-id',
        name: 'free',
        priceInCents: 0,
        cycle: SubscriptionPlanCycle.ONE_TIME,
        features: [
          {
            name: 'some-feature-name',
            description: 'some-feature-description'
          },
        ],
        createdAt: new Date(),
        updatedAt: new Date(),
      },
      createdAt: new Date(),
      updatedAt: new Date(),
    }),
  },
});
The sandbox prop should only be used for local development. Do not use it in production.

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3. Check if the User is subscribed

The hasSubscription method returns the user’s subscription status: true if subscribed and false otherwise. 
import { Payments } from '@microapp-io/payments';

const hasSubscription = await payments.hasSubscription();

if (hasSubscription) {
  console.log('User is subscribed');
} else {
  console.log('User is not subscribed');
}

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4. Get the User’s subscription information

The getSubscription method returns the user’s subscription information. 
import { Payments } from '@microapp-io/payments';

const userSubscription = await payments.getSubscription();

console.log('User subscription:', userSubscription);

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5. Prompt the User to subscribe

If the user is not subscribed, you can prompt them to subscribe by calling the requireSubscription method. 
import { Payments } from '@microapp-io/payments';

await payments.requireSubscription();

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6. Get Notified when the User is subscribed

You can get notified when the user subscribes or changes its subscription using onUserSubscribed method. 
import { Payments } from '@microapp-io/payments';

const unsubscribeCallback = payments.onUserSubscribed((userSubscription) => {
  console.log(`User just subscribed`, userSubscription);
});

await payments.requireSubscription();

// Unsubscribe the callback
unsubscribeCallback();