server.py

#! /usr/bin/env python3.6
import stripe
import json
import os

from flask import Flask, render_template, jsonify, request, send_from_directory
from dotenv import load_dotenv, find_dotenv

load_dotenv(find_dotenv())

# For sample support and debugging, not required for production:
stripe.set_app_info(
    'stripe-samples/accept-a-payment/custom-payment-flow',
    version='0.0.2',
    url='https://github.com/stripe-samples')

stripe.api_version = '2020-08-27'
stripe.api_key = os.getenv('STRIPE_SECRET_KEY')

static_dir = str(os.path.abspath(os.path.join(__file__ , "..", os.getenv("STATIC_DIR"))))
app = Flask(__name__, static_folder=static_dir, static_url_path="", template_folder=static_dir)

@app.route('/', methods=['GET'])
def get_root():
    return render_template('index.html')


@app.route('/config', methods=['GET'])
def get_config():
    return jsonify({'publishableKey': os.getenv('STRIPE_PUBLISHABLE_KEY')})


@app.route('/create-payment-intent', methods=['POST'])
def create_payment():
    data = json.loads(request.data)

    # Each payment method type has support for different currencies. In order to
    # support many payment method types and several currencies, this server
    # endpoint accepts both the payment method type and the currency as
    # parameters.
    #
    # Some example payment method types include `card`, `ideal`, and `alipay`.
    payment_method_type = data['paymentMethodType']
    currency = data['currency']

    # Create a PaymentIntent with the amount, currency, and a payment method type.
    #
    # See the documentation [0] for the full list of supported parameters.
    #
    # [0] https://stripe.com/docs/api/payment_intents/create
    params = {
        'payment_method_types': [payment_method_type],
        'amount': 1999,
        'currency': currency
    }

    # If this is for an ACSS payment, we add payment_method_options
    # to create the Mandate. This is not required if you're not accepting
    # ACSS (Pre-authorized debit in Canada).
    if payment_method_type == 'acss_debit':
        params['payment_method_options'] = {
            'acss_debit': {
                'mandate_options': {
                    'payment_schedule': 'sporadic',
                    'transaction_type': 'personal'
                }
            }
        }


    try:
        intent = stripe.PaymentIntent.create(**params)

        # Send PaymentIntent details to the front end.
        return jsonify({'clientSecret': intent.client_secret})
    except stripe.error.StripeError as e:
        return jsonify({'error': {'message': str(e)}}), 400
    except Exception as e:
        return jsonify({'error': {'message': str(e)}}), 400


@app.route('/webhook', methods=['POST'])
def webhook_received():
    # You can use webhooks to receive information about asynchronous payment events.
    # For more about our webhook events check out https://stripe.com/docs/webhooks.
    webhook_secret = os.getenv('STRIPE_WEBHOOK_SECRET')
    request_data = json.loads(request.data)

    if webhook_secret:
        # Retrieve the event by verifying the signature using the raw body and secret if webhook signing is configured.
        signature = request.headers.get('stripe-signature')
        try:
            event = stripe.Webhook.construct_event(
                payload=request.data, sig_header=signature, secret=webhook_secret)
            data = event['data']
        except Exception as e:
            return e
        # Get the type of webhook event sent - used to check the status of PaymentIntents.
        event_type = event['type']
    else:
        data = request_data['data']
        event_type = request_data['type']
    data_object = data['object']

    if event_type == 'payment_intent.succeeded':
        print('💰 Payment received!')
        # Fulfill any orders, e-mail receipts, etc
        # To cancel the payment you will need to issue a Refund (https://stripe.com/docs/api/refunds)
    elif event_type == 'payment_intent.payment_failed':
        print('❌ Payment failed.')
    return jsonify({'status': 'success'})


if __name__ == '__main__':
    app.run(port=4242, debug=True)