README.md

# Proof of Concept Portal

**Backend Stack**

* Nginx HTTP proxy <-> Gunicorn[Uvicorn ASGI] <-> [FastAPI](https://fastapi.tiangolo.com) @ Python 3.7
* SqlAlchemy ORM -> PostgreSQL
* (MJML](https://mjml.io)

**Frontend Stack**

* React https://reactjs.org
* Webpack build https://create-react-app.derv
* Sass stylesheet
* Nginx HTTP proxy

# Urls

* Backend OpenAPI : http://localtest.me:8000/docs
* Frontend: http://localhost:3000/checkout

# Stripe TEST CARD

| Type               | Issuer    | Payment  | ID                  |
| ------------------ | --------- | -------- | --------------------|
| French Visa        | Stripe.uk | succeeds | 4000 0025 0000 0003 |
| International Visa | Stripe.us | succeeds | 4242 4242 4242 4242 |
| International Visa | Stripe.us | declined | 4000 0025 0000 3155 |

# Stripe Fee Computation

```
P = N + 0.25 + N*f
  = N*(1+f) + 0.25

N = (P - 0.25) / (1 + f)

10*(1+1.4/100) + 0.25 = + 0.39
100                   = + 1.65
500                   = + 7.25
```