first

packages/payments/biome.json

@@ -0,0 +1,3 @@
+{
+	"extends": ["../../biome.json"]
+}

packages/payments/index.ts

@@ -0,0 +1,2 @@
+export * from "./provider";
+export * from "./src/lib/customer";

packages/payments/package.json

@@ -0,0 +1,32 @@
+{
+	"dependencies": {
+		"@lemonsqueezy/lemonsqueezy.js": "^4.0.0",
+		"@polar-sh/sdk": "^0.33.0",
+		"@repo/config": "workspace:*",
+		"@repo/database": "workspace:*",
+		"@repo/logs": "workspace:*",
+		"chargebee-typescript": "^2.48.0",
+		"stripe": "^18.2.1",
+		"ufo": "^1.6.1"
+	},
+	"devDependencies": {
+		"@biomejs/biome": "1.9.4",
+		"@repo/tsconfig": "workspace:*",
+		"@types/node": "^22.15.30"
+	},
+	"main": "./index.ts",
+	"exports": {
+		".": {
+			"types": "./index.ts",
+			"default": "./index.ts"
+		},
+		"./types": "./types.ts",
+		"./lib/helper": "./src/lib/helper.ts"
+	},
+	"name": "@repo/payments",
+	"scripts": {
+		"type-check": "tsc --noEmit"
+	},
+	"types": "./**/.ts",
+	"version": "0.0.0"
+}

packages/payments/provider/creem/index.ts

@@ -0,0 +1,220 @@
+import { createHmac } from "node:crypto";
+import {
+	createPurchase,
+	deletePurchaseBySubscriptionId,
+	getPurchaseBySubscriptionId,
+	updatePurchase,
+} from "@repo/database";
+import { logger } from "@repo/logs";
+import { joinURL } from "ufo";
+import type {
+	CancelSubscription,
+	CreateCheckoutLink,
+	CreateCustomerPortalLink,
+	SetSubscriptionSeats,
+	WebhookHandler,
+} from "../../types";
+
+export function creemFetch(path: string, init: Parameters<typeof fetch>[1]) {
+	const creemApiKey = process.env.CREEM_API_KEY as string;
+
+	if (!creemApiKey) {
+		throw new Error("Missing env variable CREEM_API_KEY");
+	}
+
+	const baseUrl =
+		process.env.NODE_ENV === "production"
+			? "https://api.creem.io/v1"
+			: "https://test-api.creem.io/v1";
+
+	const requestUrl = joinURL(baseUrl, path);
+
+	return fetch(requestUrl, {
+		...init,
+		headers: {
+			"x-api-key": creemApiKey,
+			"Content-Type": "application/json",
+		},
+	});
+}
+
+export const createCheckoutLink: CreateCheckoutLink = async (options) => {
+	const { productId, redirectUrl, organizationId, userId, seats, email } =
+		options;
+
+	const response = await creemFetch("/checkouts", {
+		method: "POST",
+		body: JSON.stringify({
+			product_id: productId,
+			units: seats ?? 1,
+			success_url: redirectUrl ?? undefined,
+			metadata: {
+				organization_id: organizationId || null,
+				user_id: userId || null,
+			},
+			customer: {
+				email,
+			},
+		}),
+	});
+
+	if (!response.ok) {
+		logger.error("Failed to create checkout link", await response.json());
+		throw new Error("Failed to create checkout link");
+	}
+
+	const { checkout_url } = await response.json();
+
+	return checkout_url;
+};
+
+export const createCustomerPortalLink: CreateCustomerPortalLink = async ({
+	customerId,
+}) => {
+	const response = await creemFetch("/customers/billing", {
+		method: "POST",
+		body: JSON.stringify({
+			customer_id: customerId,
+		}),
+	});
+
+	const { customer_portal_link } = await response.json();
+
+	return customer_portal_link;
+};
+
+export const setSubscriptionSeats: SetSubscriptionSeats = async ({
+	id,
+	seats,
+}) => {
+	const response = await creemFetch(`/subscriptions?subscription_id=${id}`, {
+		method: "GET",
+	});
+
+	const { items } = await response.json();
+
+	await creemFetch(`/subscriptions/${id}`, {
+		method: "POST",
+		body: JSON.stringify({
+			items: [
+				{
+					id: items[0].id,
+					quantity: seats,
+				},
+			],
+		}),
+	});
+};
+
+export const cancelSubscription: CancelSubscription = async (id) => {
+	await creemFetch(`/subscriptions/${id}/cancel`, {
+		method: "POST",
+	});
+};
+
+export const webhookHandler: WebhookHandler = async (req) => {
+	if (req.method !== "POST") {
+		return new Response("Method not allowed.", {
+			status: 405,
+		});
+	}
+
+	const signature = req.headers.get("creem-signature");
+
+	if (!signature) {
+		return new Response("Missing signature.", {
+			status: 400,
+		});
+	}
+
+	const secret = process.env.CREEM_WEBHOOK_SECRET as string;
+
+	if (!secret) {
+		return new Response("Missing webhook secret.", {
+			status: 400,
+		});
+	}
+
+	const bodyText = await req.text();
+
+	const computedSignature = createHmac("sha256", secret)
+		.update(bodyText)
+		.digest("hex");
+
+	if (computedSignature !== signature) {
+		return new Response("Invalid signature.", {
+			status: 400,
+		});
+	}
+
+	const payload = JSON.parse(bodyText);
+
+	try {
+		switch (payload.eventType) {
+			case "checkout.completed": {
+				const { product, metadata, object, customer } = payload.object;
+				if (!product?.id) {
+					return new Response("Missing product ID.", {
+						status: 400,
+					});
+				}
+
+				if (object === "subscription") {
+					break;
+				}
+
+				await createPurchase({
+					organizationId: metadata?.organization_id || null,
+					userId: metadata?.user_id || null,
+					customerId: customer as string,
+					type: "ONE_TIME",
+					productId: product.id,
+				});
+
+				break;
+			}
+			case "subscription.active": {
+				const { id, customer, product, metadata } = payload.object;
+				const existingPurchase = await getPurchaseBySubscriptionId(id);
+
+				if (existingPurchase) {
+					await updatePurchase({
+						id: existingPurchase.id,
+						status: product.status,
+						productId: product.id,
+					});
+					break;
+				}
+
+				await createPurchase({
+					subscriptionId: id,
+					customerId: customer.id,
+					type: "SUBSCRIPTION",
+					productId: product.id,
+					organizationId: metadata?.organization_id || null,
+					userId: metadata?.user_id || null,
+				});
+
+				break;
+			}
+			case "subscription.canceled":
+			case "subscription.expired": {
+				const { id } = payload.object;
+				await deletePurchaseBySubscriptionId(id);
+				break;
+			}
+			default:
+				return new Response("Unhandled event type.", {
+					status: 200,
+				});
+		}
+		return new Response(null, { status: 204 });
+	} catch (error) {
+		return new Response(
+			`Webhook error: ${error instanceof Error ? error.message : ""}`,
+			{
+				status: 400,
+			},
+		);
+	}
+};

packages/payments/provider/index.ts

@@ -0,0 +1 @@
+export * from "./stripe";

packages/payments/provider/lemonsqueezy/index.ts

@@ -0,0 +1,246 @@
+import { createHmac, timingSafeEqual } from "node:crypto";
+import {
+	cancelSubscription as cancelSubscriptionResolver,
+	createCheckout,
+	getCustomer,
+	getSubscription,
+	lemonSqueezySetup,
+	updateSubscriptionItem,
+} from "@lemonsqueezy/lemonsqueezy.js";
+import {
+	createPurchase,
+	deletePurchaseBySubscriptionId,
+	getPurchaseBySubscriptionId,
+	updatePurchase,
+} from "@repo/database";
+import { setCustomerIdToEntity } from "../../src/lib/customer";
+import type {
+	CancelSubscription,
+	CreateCheckoutLink,
+	CreateCustomerPortalLink,
+	SetSubscriptionSeats,
+	WebhookHandler,
+} from "../../types";
+
+function initLemonsqueezyApi() {
+	lemonSqueezySetup({
+		apiKey: process.env.LEMONSQUEEZY_API_KEY as string,
+	});
+}
+
+export const createCheckoutLink: CreateCheckoutLink = async (options) => {
+	initLemonsqueezyApi();
+
+	const { customerId, seats, productId, redirectUrl, email, name } = options;
+
+	const response = await createCheckout(
+		String(process.env.LEMONSQUEEZY_STORE_ID),
+		productId,
+		{
+			productOptions: {
+				redirectUrl,
+				enabledVariants: [Number.parseInt(productId)],
+			},
+			checkoutData: {
+				email,
+				name,
+				variantQuantities: [
+					{
+						variantId: Number.parseInt(productId),
+						quantity: seats ?? 1,
+					},
+				],
+				custom:
+					"organizationId" in options
+						? {
+								organization_id: options.organizationId,
+							}
+						: {
+								user_id: options.userId,
+							},
+			},
+		},
+	);
+
+	return response.data?.data.attributes.url ?? null;
+};
+
+export const createCustomerPortalLink: CreateCustomerPortalLink = async ({
+	customerId,
+}) => {
+	initLemonsqueezyApi();
+
+	const response = await getCustomer(customerId);
+
+	return response.data?.data.attributes.urls.customer_portal ?? null;
+};
+
+export const setSubscriptionSeats: SetSubscriptionSeats = async ({
+	id,
+	seats,
+}) => {
+	initLemonsqueezyApi();
+
+	const subscription = await getSubscription(id, {
+		include: ["subscription-items"],
+	});
+
+	if (!subscription) {
+		throw new Error("Subscription not found.");
+	}
+
+	const subscriptionItem =
+		subscription.data?.data.relationships["subscription-items"].data?.[0];
+
+	if (!subscriptionItem) {
+		throw new Error("Subscription item not found.");
+	}
+
+	await updateSubscriptionItem(subscriptionItem.id, {
+		quantity: seats,
+	});
+};
+
+export const cancelSubscription: CancelSubscription = async (id) => {
+	initLemonsqueezyApi();
+
+	await cancelSubscriptionResolver(id);
+};
+
+export const webhookHandler: WebhookHandler = async (req: Request) => {
+	try {
+		const text = await req.text();
+		const hmac = createHmac(
+			"sha256",
+			process.env.LEMONSQUEEZY_WEBHOOK_SECRET as string,
+		);
+		const digest = Buffer.from(hmac.update(text).digest("hex"), "utf8");
+		const signature = Buffer.from(
+			req.headers.get("x-signature") as string,
+			"utf8",
+		);
+
+		if (!timingSafeEqual(digest, signature)) {
+			return new Response("Invalid signature.", {
+				status: 400,
+			});
+		}
+
+		const payload = JSON.parse(text) as {
+			meta: {
+				event_name: string;
+				custom_data: {
+					organization_id?: string;
+					user_id?: string;
+				};
+			};
+			data: {
+				id: string;
+				attributes: {
+					customer_id: string;
+					product_id: string;
+					variant_id: string;
+					status: string;
+					trial_ends_at?: number;
+					renews_at?: number;
+				};
+			};
+		} | null;
+
+		if (!payload) {
+			return new Response("Invalid payload.", {
+				status: 400,
+			});
+		}
+
+		const {
+			meta: { event_name: eventName, custom_data: customData },
+			data,
+		} = payload;
+
+		const id = String(data.id);
+
+		switch (eventName) {
+			case "subscription_created": {
+				await createPurchase({
+					organizationId: customData.organization_id,
+					userId: customData.user_id,
+					subscriptionId: id,
+					customerId: String(data.attributes.customer_id),
+					productId: String(data.attributes.variant_id),
+					status: data.attributes.status,
+					type: "SUBSCRIPTION",
+				});
+
+				await setCustomerIdToEntity(
+					String(data.attributes.customer_id),
+					{
+						organizationId: customData.organization_id,
+						userId: customData.user_id,
+					},
+				);
+
+				break;
+			}
+			case "subscription_updated":
+			case "subscription_cancelled":
+			case "subscription_resumed": {
+				const subscriptionId = String(data.id);
+
+				const existingPurchase =
+					await getPurchaseBySubscriptionId(subscriptionId);
+
+				if (existingPurchase) {
+					await updatePurchase({
+						id: existingPurchase.id,
+						status: data.attributes.status,
+					});
+				}
+
+				break;
+			}
+
+			case "subscription_expired": {
+				const subscriptionId = String(data.id);
+
+				await deletePurchaseBySubscriptionId(subscriptionId);
+
+				break;
+			}
+			case "order_created": {
+				await createPurchase({
+					organizationId: customData.organization_id,
+					userId: customData.user_id,
+					customerId: String(data.attributes.customer_id),
+					productId: String(data.attributes.product_id),
+					type: "ONE_TIME",
+				});
+
+				await setCustomerIdToEntity(
+					String(data.attributes.customer_id),
+					{
+						organizationId: customData.organization_id,
+						userId: customData.user_id,
+					},
+				);
+
+				break;
+			}
+
+			default: {
+				return new Response("Unhandled event type.", {
+					status: 200,
+				});
+			}
+		}
+
+		return new Response(null, { status: 204 });
+	} catch (error) {
+		return new Response(
+			`Webhook error: ${error instanceof Error ? error.message : ""}`,
+			{
+				status: 400,
+			},
+		);
+	}
+};

packages/payments/provider/polar/index.ts

@@ -0,0 +1,181 @@
+import { Polar } from "@polar-sh/sdk";
+import {
+	WebhookVerificationError,
+	validateEvent,
+} from "@polar-sh/sdk/webhooks.js";
+import {
+	createPurchase,
+	deletePurchaseBySubscriptionId,
+	getPurchaseBySubscriptionId,
+	updatePurchase,
+} from "@repo/database";
+import { setCustomerIdToEntity } from "../../src/lib/customer";
+import type {
+	CancelSubscription,
+	CreateCheckoutLink,
+	CreateCustomerPortalLink,
+	SetSubscriptionSeats,
+	WebhookHandler,
+} from "../../types";
+
+const polarAccessToken = process.env.POLAR_ACCESS_TOKEN as string;
+const polarWebhookSecret = process.env.POLAR_WEBHOOK_SECRET as string;
+
+if (!polarAccessToken) {
+	throw new Error("Missing env variable POLAR_ACCESS_TOKEN");
+}
+
+if (!polarWebhookSecret) {
+	throw new Error("Missing env variable POLAR_WEBHOOK_SECRET");
+}
+
+const polarClient = new Polar({
+	accessToken: polarAccessToken,
+	server: process.env.NODE_ENV === "production" ? "production" : "sandbox",
+});
+
+export const createCheckoutLink: CreateCheckoutLink = async (options) => {
+	const { productId, redirectUrl, customerId, organizationId, userId } =
+		options;
+
+	const metadata: Record<string, string> = {};
+
+	if (organizationId) {
+		metadata.organization_id = organizationId;
+	}
+
+	if (userId) {
+		metadata.user_id = userId;
+	}
+
+	const response = await polarClient.checkouts.create({
+		products: [productId],
+		successUrl: redirectUrl ?? "",
+		metadata,
+		customerId: customerId || undefined,
+	});
+
+	return response.url;
+};
+
+export const createCustomerPortalLink: CreateCustomerPortalLink = async ({
+	customerId,
+}) => {
+	const response = await polarClient.customerSessions.create({
+		customerId: customerId,
+	});
+
+	return response.customerPortalUrl;
+};
+
+export const setSubscriptionSeats: SetSubscriptionSeats = async () => {
+	throw new Error("Not implemented");
+};
+
+export const cancelSubscription: CancelSubscription = async (id) => {
+	await polarClient.subscriptions.revoke({
+		id,
+	});
+};
+
+export const webhookHandler: WebhookHandler = async (req) => {
+	try {
+		if (!req.body) {
+			return new Response("No body", {
+				status: 400,
+			});
+		}
+
+		const event = validateEvent(
+			await req.text(),
+			Object.fromEntries(req.headers.entries()),
+			polarWebhookSecret,
+		);
+
+		switch (event.type) {
+			case "order.created": {
+				const { metadata, customerId, subscription, productId } =
+					event.data;
+
+				if (subscription) {
+					break;
+				}
+
+				await createPurchase({
+					organizationId:
+						(metadata?.organization_id as string) || null,
+					userId: (metadata?.user_id as string) || null,
+					customerId,
+					type: "ONE_TIME",
+					productId,
+				});
+
+				await setCustomerIdToEntity(customerId, {
+					organizationId: metadata?.organization_id as string,
+					userId: metadata?.user_id as string,
+				});
+
+				break;
+			}
+			case "subscription.created": {
+				const { metadata, customerId, productId, id, status } =
+					event.data;
+
+				await createPurchase({
+					subscriptionId: id,
+					organizationId: metadata?.organization_id as string,
+					userId: metadata?.user_id as string,
+					customerId,
+					type: "SUBSCRIPTION",
+					productId,
+					status,
+				});
+
+				await setCustomerIdToEntity(customerId, {
+					organizationId: metadata?.organization_id as string,
+					userId: metadata?.user_id as string,
+				});
+
+				break;
+			}
+			case "subscription.updated": {
+				const { id, status, productId } = event.data;
+
+				const existingPurchase = await getPurchaseBySubscriptionId(id);
+
+				if (existingPurchase) {
+					await updatePurchase({
+						id: existingPurchase.id,
+						status,
+						productId,
+					});
+				}
+
+				break;
+			}
+			case "subscription.canceled": {
+				const { id } = event.data;
+
+				await deletePurchaseBySubscriptionId(id);
+
+				break;
+			}
+
+			default:
+				return new Response("Unhandled event type.", {
+					status: 200,
+				});
+		}
+
+		return new Response(null, {
+			status: 202,
+		});
+	} catch (error) {
+		if (error instanceof WebhookVerificationError) {
+			return new Response("Invalid request.", {
+				status: 403,
+			});
+		}
+		throw error;
+	}
+};

packages/payments/provider/stripe/index.ts

@@ -0,0 +1,254 @@
+import {
+	createPurchase,
+	deletePurchaseBySubscriptionId,
+	getPurchaseBySubscriptionId,
+	updatePurchase,
+} from "@repo/database";
+import { logger } from "@repo/logs";
+import Stripe from "stripe";
+import { setCustomerIdToEntity } from "../../src/lib/customer";
+import type {
+	CancelSubscription,
+	CreateCheckoutLink,
+	CreateCustomerPortalLink,
+	SetSubscriptionSeats,
+	WebhookHandler,
+} from "../../types";
+
+let stripeClient: Stripe | null = null;
+
+export function getStripeClient() {
+	if (stripeClient) {
+		return stripeClient;
+	}
+
+	const stripeSecretKey = process.env.STRIPE_SECRET_KEY as string;
+
+	if (!stripeSecretKey) {
+		throw new Error("Missing env variable STRIPE_SECRET_KEY");
+	}
+
+	stripeClient = new Stripe(stripeSecretKey);
+
+	return stripeClient;
+}
+
+export const createCheckoutLink: CreateCheckoutLink = async (options) => {
+	const stripeClient = getStripeClient();
+	const {
+		type,
+		productId,
+		redirectUrl,
+		customerId,
+		organizationId,
+		userId,
+		trialPeriodDays,
+		seats,
+		email,
+	} = options;
+
+	const metadata = {
+		organization_id: organizationId || null,
+		user_id: userId || null,
+	};
+
+	const response = await stripeClient.checkout.sessions.create({
+		mode: type === "subscription" ? "subscription" : "payment",
+		success_url: redirectUrl ?? "",
+		line_items: [
+			{
+				quantity: seats ?? 1,
+				price: productId,
+			},
+		],
+		customer: customerId,
+		customer_email: email,
+		...(type === "one-time"
+			? {
+					payment_intent_data: {
+						metadata,
+					},
+					customer_creation: "always",
+				}
+			: {
+					subscription_data: {
+						metadata,
+						trial_period_days: trialPeriodDays,
+					},
+				}),
+		metadata,
+	});
+
+	return response.url;
+};
+
+export const createCustomerPortalLink: CreateCustomerPortalLink = async ({
+	customerId,
+	redirectUrl,
+}) => {
+	const stripeClient = getStripeClient();
+
+	const response = await stripeClient.billingPortal.sessions.create({
+		customer: customerId,
+		return_url: redirectUrl ?? "",
+	});
+
+	return response.url;
+};
+
+export const setSubscriptionSeats: SetSubscriptionSeats = async ({
+	id,
+	seats,
+}) => {
+	const stripeClient = getStripeClient();
+
+	const subscription = await stripeClient.subscriptions.retrieve(id);
+
+	if (!subscription) {
+		throw new Error("Subscription not found.");
+	}
+
+	await stripeClient.subscriptions.update(id, {
+		items: [
+			{
+				id: subscription.items.data[0].id,
+				quantity: seats,
+			},
+		],
+	});
+};
+
+export const cancelSubscription: CancelSubscription = async (id) => {
+	const stripeClient = getStripeClient();
+
+	await stripeClient.subscriptions.cancel(id);
+};
+
+export const webhookHandler: WebhookHandler = async (req) => {
+	const stripeClient = getStripeClient();
+
+	if (!req.body) {
+		return new Response("Invalid request.", {
+			status: 400,
+		});
+	}
+
+	let event: Stripe.Event | undefined;
+
+	try {
+		event = await stripeClient.webhooks.constructEventAsync(
+			await req.text(),
+			req.headers.get("stripe-signature") as string,
+			process.env.STRIPE_WEBHOOK_SECRET as string,
+		);
+	} catch (e) {
+		logger.error(e);
+
+		return new Response("Invalid request.", {
+			status: 400,
+		});
+	}
+
+	try {
+		switch (event.type) {
+			case "checkout.session.completed": {
+				const { mode, metadata, customer, id } = event.data.object;
+
+				if (mode === "subscription") {
+					break;
+				}
+
+				const checkoutSession =
+					await stripeClient.checkout.sessions.retrieve(id, {
+						expand: ["line_items"],
+					});
+
+				const productId = checkoutSession.line_items?.data[0].price?.id;
+
+				if (!productId) {
+					return new Response("Missing product ID.", {
+						status: 400,
+					});
+				}
+
+				await createPurchase({
+					organizationId: metadata?.organization_id || null,
+					userId: metadata?.user_id || null,
+					customerId: customer as string,
+					type: "ONE_TIME",
+					productId,
+				});
+
+				await setCustomerIdToEntity(customer as string, {
+					organizationId: metadata?.organization_id,
+					userId: metadata?.user_id,
+				});
+
+				break;
+			}
+			case "customer.subscription.created": {
+				const { metadata, customer, items, id } = event.data.object;
+
+				const productId = items?.data[0].price?.id;
+
+				if (!productId) {
+					return new Response("Missing product ID.", {
+						status: 400,
+					});
+				}
+
+				await createPurchase({
+					subscriptionId: id,
+					organizationId: metadata?.organization_id || null,
+					userId: metadata?.user_id || null,
+					customerId: customer as string,
+					type: "SUBSCRIPTION",
+					productId,
+					status: event.data.object.status,
+				});
+
+				await setCustomerIdToEntity(customer as string, {
+					organizationId: metadata?.organization_id,
+					userId: metadata?.user_id,
+				});
+
+				break;
+			}
+			case "customer.subscription.updated": {
+				const subscriptionId = event.data.object.id;
+
+				const existingPurchase =
+					await getPurchaseBySubscriptionId(subscriptionId);
+
+				if (existingPurchase) {
+					await updatePurchase({
+						id: existingPurchase.id,
+						status: event.data.object.status,
+						productId: event.data.object.items?.data[0].price?.id,
+					});
+				}
+
+				break;
+			}
+			case "customer.subscription.deleted": {
+				await deletePurchaseBySubscriptionId(event.data.object.id);
+
+				break;
+			}
+
+			default:
+				return new Response("Unhandled event type.", {
+					status: 200,
+				});
+		}
+
+		return new Response(null, { status: 204 });
+	} catch (error) {
+		return new Response(
+			`Webhook error: ${error instanceof Error ? error.message : ""}`,
+			{
+				status: 400,
+			},
+		);
+	}
+};

packages/payments/src/lib/customer.ts

@@ -0,0 +1,36 @@
+import {
+	getOrganizationById,
+	getUserById,
+	updateOrganization,
+	updateUser,
+} from "@repo/database";
+
+export async function setCustomerIdToEntity(
+	customerId: string,
+	{ organizationId, userId }: { organizationId?: string; userId?: string },
+) {
+	if (organizationId) {
+		await updateOrganization({
+			id: organizationId,
+			paymentsCustomerId: customerId,
+		});
+	} else if (userId) {
+		await updateUser({
+			id: userId,
+			paymentsCustomerId: customerId,
+		});
+	}
+}
+
+export const getCustomerIdFromEntity = async (
+	props: { organizationId: string } | { userId: string },
+) => {
+	if ("organizationId" in props) {
+		return (
+			(await getOrganizationById(props.organizationId))
+				?.paymentsCustomerId ?? null
+		);
+	}
+
+	return (await getUserById(props.userId))?.paymentsCustomerId ?? null;
+};

packages/payments/src/lib/helper.ts

@@ -0,0 +1,85 @@
+import { type Config, config } from "@repo/config";
+import type { Purchase } from "@repo/database";
+
+const plans = config.payments.plans as Config["payments"]["plans"];
+
+type PlanId = keyof typeof config.payments.plans;
+type PurchaseWithoutTimestamps = Omit<Purchase, "createdAt" | "updatedAt">;
+
+function getActivePlanFromPurchases(purchases?: PurchaseWithoutTimestamps[]) {
+	const subscriptionPurchase = purchases?.find(
+		(purchase) => purchase.type === "SUBSCRIPTION",
+	);
+
+	if (subscriptionPurchase) {
+		const plan = Object.entries(plans).find(([_, plan]) =>
+			plan.prices?.some(
+				(price) => price.productId === subscriptionPurchase.productId,
+			),
+		);
+
+		return {
+			id: plan?.[0] as PlanId,
+			price: plan?.[1].prices?.find(
+				(price) => price.productId === subscriptionPurchase.productId,
+			),
+			status: subscriptionPurchase.status,
+			purchaseId: subscriptionPurchase.id,
+		};
+	}
+
+	const oneTimePurchase = purchases?.find(
+		(purchase) => purchase.type === "ONE_TIME",
+	);
+
+	if (oneTimePurchase) {
+		const plan = Object.entries(plans).find(([_, plan]) =>
+			plan.prices?.some(
+				(price) => price.productId === oneTimePurchase.productId,
+			),
+		);
+
+		return {
+			id: plan?.[0] as PlanId,
+			price: plan?.[1].prices?.find(
+				(price) => price.productId === oneTimePurchase.productId,
+			),
+			status: "active",
+			purchaseId: oneTimePurchase.id,
+		};
+	}
+
+	const freePlan = Object.entries(plans).find(([_, plan]) => plan.isFree);
+
+	return freePlan
+		? {
+				id: freePlan[0] as PlanId,
+				status: "active",
+			}
+		: null;
+}
+
+export function createPurchasesHelper(purchases: PurchaseWithoutTimestamps[]) {
+	const activePlan = getActivePlanFromPurchases(purchases);
+
+	const hasSubscription = (planIds?: PlanId[] | PlanId) => {
+		return (
+			!!activePlan &&
+			(Array.isArray(planIds)
+				? planIds.includes(activePlan.id)
+				: planIds === activePlan.id)
+		);
+	};
+
+	const hasPurchase = (planId: PlanId) => {
+		return !!purchases?.some((purchase) =>
+			Object.entries(plans)
+				.find(([id]) => id === planId)?.[1]
+				.prices?.some(
+					(price) => price.productId === purchase.productId,
+				),
+		);
+	};
+
+	return { activePlan, hasSubscription, hasPurchase };
+}

packages/payments/tsconfig.json

@@ -0,0 +1,5 @@
+{
+	"extends": "@repo/tsconfig/base.json",
+	"include": ["**/*.ts"],
+	"exclude": ["dist", "build", "node_modules"]
+}

packages/payments/types.ts

@@ -0,0 +1,33 @@
+export type CreateCheckoutLink = (params: {
+	type: "subscription" | "one-time";
+	productId: string;
+	email?: string;
+	name?: string;
+	redirectUrl?: string;
+	customerId?: string;
+	organizationId?: string;
+	userId?: string;
+	trialPeriodDays?: number;
+	seats?: number;
+}) => Promise<string | null>;
+
+export type CreateCustomerPortalLink = (params: {
+	subscriptionId?: string;
+	customerId: string;
+	redirectUrl?: string;
+}) => Promise<string | null>;
+
+export type SetSubscriptionSeats = (params: {
+	id: string;
+	seats: number;
+}) => Promise<void>;
+
+export type CancelSubscription = (id: string) => Promise<void>;
+
+export type WebhookHandler = (req: Request) => Promise<Response>;
+
+export type PaymentProvider = {
+	createCheckoutLink: CreateCheckoutLink;
+	createCustomerPortalLink: CreateCustomerPortalLink;
+	webhookHandler: WebhookHandler;
+};