1. Exchange API

Using FastAPI1 (or other framework) on Python , create a REST API that allows the user to convert between currencies. The API should have the following endpoints:

GET /exchange/{from}/{to}

Get the current of a coin from one currency to another. E.g. GET /coin/USD/EUR.

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{
    "sell": 0.82,
    "buy": 0.80,
    "date": "2021-09-01 14:23:42",
    "id-account": "0195ae95-5be7-7dd3-b35d-7a7d87c404fb"
}

Response code: 200 (ok)

The API should use a third-party API to get the exchange rates. You can use the free tier of the API, e.g.:

Or, you can scrape the data from a website.

Hint

You can use the requests library to make HTTP requests to the third-party API.

Attention

To consume the API, the user must be authenticated.

Gateway

This API should be consumed through the Gateway of the platform.

flowchart LR
    subgraph api [Trusted Layer]
        direction TB
        gateway --> account
        gateway --> auth
        account --> db@{ shape: cyl, label: "Database" }
        auth --> account
        gateway e1@==> exchange:::red
        e1@{ animate: true }
    end
    exchange e2@==> 3partyapi@{label: "3rd-party API"}
    internet e3@==>|request| gateway
    e2@{ animate: true }
    e3@{ animate: true }
    classDef red fill:#fcc
    click exchange "#exchange-api" "Exchange API"

  1. FastAPI - First Steps. ↩