polar-fastify

@polar-sh/fastify

Payments and Checkouts made dead simple with Fastify.

pnpm install @polar-sh/fastify zod

Checkout

Create a Checkout handler which takes care of redirections.

import fastify from "fastify";
import { Checkout } from "@polar-sh/fastify";

fastify().get(
  "/checkout",
  Checkout({
    accessToken: "xxx", // Or set an environment variable to POLAR_ACCESS_TOKEN
    successUrl: process.env.SUCCESS_URL,
    server: "sandbox", // Use sandbox if you're testing Polar - omit the parameter or pass 'production' otherwise
  }),
);

Query Params

Pass query params to this route.

• productId (or productPriceId) ?productId=xxx
• productPriceId (or productId) ?productPriceId=xxx
• customerId (optional) ?productId=xxx&customerId=xxx
• customerEmail (optional) ?productId=xxx&[email protected]
• customerName (optional) ?productId=xxx&customerName=Jane
• metadata (optional) URL-Encoded JSON string

Customer Portal

Create a customer portal where your customer can view orders and subscriptions.

import fastify from "fastify";
import { CustomerPortal } from "@polar-sh/fastify";

fastify().get(
  "/portal",
  CustomerPortal({
    accessToken: "xxx", // Or set an environment variable to POLAR_ACCESS_TOKEN
    getCustomerId: (event) => "", // Fuction to resolve a Polar Customer ID
    server: "sandbox", // Use sandbox if you're testing Polar - omit the parameter or pass 'production' otherwise
  }),
);

Webhooks

A simple utility which resolves incoming webhook payloads by signing the webhook secret properly.

import fastify from 'fastify'
import { Webhooks } from "@polar-sh/fastify";

fastify.post('/polar/webhooks', Webhooks({
  webhookSecret: process.env.POLAR_WEBHOOK_SECRET!,
  onPayload: async (payload) => /** Handle payload */,
}))

Payload Handlers

The Webhook handler also supports granular handlers for easy integration.

• onCheckoutCreated: (payload) =>
• onCheckoutUpdated: (payload) =>
• onOrderCreated: (payload) =>
• onSubscriptionCreated: (payload) =>
• onSubscriptionUpdated: (payload) =>
• onSubscriptionActive: (payload) =>
• onSubscriptionCanceled: (payload) =>
• onSubscriptionRevoked: (payload) =>
• onProductCreated: (payload) =>
• onProductUpdated: (payload) =>
• onOrganizationUpdated: (payload) =>
• onBenefitCreated: (payload) =>
• onBenefitUpdated: (payload) =>
• onBenefitGrantCreated: (payload) =>
• onBenefitGrantUpdated: (payload) =>
• onBenefitGrantRevoked: (payload) =>