💳 Node.js Lemon Squeezy Payments Function

Appwrite Function to receive payments in Lemon Squeezy and store paid orders.

🧰 Usage

POST /checkout

This endpoint creates a Lemon Squeezy checkout. The user ID is fetched from the headers of the request. If the user ID is not found or a Lemon Squeezy checkout fails, the request will be redirected to a failure URL.

Parameters

Name	Description	Location	Type	Sample Value
x-appwrite-user-id	User ID from Appwrite.	Header	String	642...7cd
Content-Type	The content type of the request body	Header	application/json	N/A
failureUrl	The URL to redirect to after a cancelled payment attempt.	Body	String	https://example.com/failure

Response

Sample 303 Response:

The response is a redirect to the Lemon Squeezy checkout URL or to the failure URL if an error occurs

Location: https://ap...re.lemonsqueezy.com/checkout/custom/7576abf3-...e2fb

Location: https://mywebapp.com/cancel

POST /webhook

This endpoint is a webhook that handles Lemon Squeezy event order_created. It validates the incoming request using the X-Signature header from the Lemon Squeezy webhook. If the validation fails, a 401 response is sent.

Parameters

Name	Description	Location	Type	Sample Value
None	Webhook payload from Lemon Squeezy.	Body	Object	See Lemon Squeezy docs
x-signature	Signature from Lemon Squeezy.	Headers	String	See Lemon Squeezy docs

Response

Sample 200 Response:

In case of order_created event, document for the order is created in Appwrite Database.

{ "success": true }

Sample 401 Response:

{ "success": false }

⚙️ Configuration

Setting	Value
Runtime	Node (18.0)
Entrypoint	src/main.js
Build Commands	npm install && npm run setup
Permissions	any
Timeout (Seconds)	15

If using a demo web app to create order, make sure to add your function domain as a web platform to your Appwrite project. Doing this fixes CORS errors and allows proper functionality.

🔒 Environment Variables

APPWRITE_API_KEY

Your Appwrite project's API key.

Question	Answer
Required	Yes
Sample Value	083d341ee48...
Documentation	Appwrite: Create an API key

APPWRITE_ENDPOINT

The endpoint where your Appwrite server is located. If not provided, it defaults to the Appwrite Cloud server: https://cloud.appwrite.io/v1.

Question	Answer
Required	No
Sample Value	https://cloud.appwrite.io/v1

APPWRITE_DATABASE_ID

The ID of the database to store the orders.

Question	Answer
Required	No
Sample Value	orders

APPWRITE_COLLECTION_ID

The ID of the collection to store the orders.

Question	Answer
Required	No
Sample Value	orders

LEMON_SQUEEZY_API_KEY

API key for sending requests to the Lemon Squeezy API.

Question	Answer
Required	Yes
Sample Value	eyJ0eXAiOiJ...
Documentation	Lemon Squeezy: API Keys

LEMON_SQUEEZY_WEBHOOK_SECRET

Secret used to validate the Lemon Squuezy Webhook signature.

Question	Answer
Required	Yes
Sample Value	abcd...
Documentation	Lemon Squeezy: Webhooks

LEMON_SQUEEZY_STORE_ID

Store ID required to create a checkout using the Lemon Squeezy API.

Question	Answer
Required	Yes
Sample Value	123456
Documentation	Lemon Squeezy: Checkouts

LEMON_SQUEEZY_VARIANT_ID

Variant ID of a product required to create a checkout using the Lemon Squeezy API.

Question	Answer
Required	Yes
Sample Value	123456
Documentation	Lemon Squeezy: Checkouts