go-serverless | Go Serverless with AWS Lambda | Serverless library

Based on Franks's post here, I've decided to wait a change from the Firebase database. Below is the workflow and the code (There's no change in index.js file):

1. A user sends payment information to Firebase realtime database such as amount currency and card token) in path of /users/{userId}/charges
2. Firebase triggers a function which sends charge request(stripe.charge.create) to Stripe.
3. After getting response, write it back to Firebase database. if the response failed, write the error message to database (see userFacingMessage functions in index.js)
4. In client side(Swift), wait for the change in the Firebase database to check the whether the response is successful or not by using Observe(.childChanged) (See the Swift code)
5. If the response is successful, display successful message to the user. If there're are any errors such as ( payment failed because a credit card expires), display failed message to the user( also display 'please try again" message)

ChargeViewController.swift

You can't run a regular Django app in AWS Lambda, but you can use Zappa to package your Django app as a Lambda-compatible app. There's no need to pay for tutorials to make Django work with Zappa, their README is fairly detailed. If you Google 'AWS Lambda Zappa Django' you'll find tons of free content as well.

Lambda is not a regular server, there's no direct HTTP access to it, you can only comunicate with a Lambda function through AWS APIs.

What Zappa does is use AWS API Gateway (which does expose HTTP endpoints to any client with internet connection) and map API Gateway endpoints with functions/classes in your application (in your case, a Django app). It's kind of a 'hack', because you can't really run a WSGI-app on Lambda.

Zappa kind of 'simulates' running your Djando app, get the response from your app, return it from the Lambda to API Gateway, which then send to the client requesting your endpoint.

Another option similar to Zappa that you should check out is Serverless. AWS also has an open source and lightweight framework for running Python apps in Lambda which is Chalice. If you already have your app developed in Django, you'd need to rewrite it to work in Chalice.