Tech Stack

The following technologies were used to develop this project:

Web Frameworks

FastAPI

Website: https://fastapi.tiangolo.com/

Most microservices were implemented using this Python framework (in fact, all of them except the API Gateway and the payments microservice)

We found using FastAPI very straightforward, its automatic API documentation and validations were really helpful.

Fastify

Website: https://www.fastify.io/

Given the technical requirement of using both Python and Javascript as backend languages, we decided Fastify was a suitable choice for the API Gateway because of its features: extensibility and high performance being the most important ones.

DBMS

PostgreSQL

Website: https://www.postgresql.org/

Users, Trips, and Pricing Rules were persisted using PostgreSQL.

MongoDB

Website: https://www.mongodb.com/

We used MongoDB for storing ratings and payments data.

PaaS

Website: https://www.heroku.com

All microservices were deployed to Heroku via Docker containers.

Programming Languages & Libraries

Python 3.10.7

• psycopg2-binary: 2.9.3

• flake8: 5.0.4

• coverage: 6.4.4

• pytest: 7.1.3

• behave: 1.2.6

• uvicorn: 0.18.3

• fastapi: 0.85.0

• requests: 2.28.1

• prometheus-client: 0.15.0

• firebase–admin: 6.0.1

• pymongo: 4.3.2

• exponent-server-sdk: 2.0.0

• sqlalchemy: 1.4.41

• alembic: 1.8.1

• email-validator: 1.3.0

• passlib: 1.7.4

Javascript ES6

• @fastify/swagger: ^7.6.1

• axios: ^0.27.2

• fastify: ^4.8.1

• fastify-plugin: ^4.2.1

• firebase-admin: ^10.0.0

• @cucumber/cucumber: ^8.6.0

• @cucumber/pretty-formatter: ^1.0.0

• eslint: ^8.27.0

• eslint-config-airbnb-base: ^15.0.0

• eslint-plugin-import: ^2.26.0

• nodemon: ^2.0.20

• pg: ^8.8.0

• tap: ^16.3.0

Solidity

In the implemented Smart Contract.