coderatio/ok-assessment

An assessment to build microservices with Nest.js, MongoDB and Typescript

Microservices Take Home Assessment

The project has three microservices.

• User Service
• Authentication Service
• Payment Service

Structure

.
├── User Service (Nest.js)/
│   ├── src/
│   │   ├── common
│   │   ├── filters
│   │   ├── guards
│   │   ├── payment
│   │   ├── schemas
│   │   ├── users
│   │   └── wallets
│   ├── Dockerfile
│   ├── .env
│   └── package.json
├── Auth Service (Nest.js)/
│   ├── src/
│   │   ├── auth
│   │   ├── common
│   │   └── filters
│   ├── Dockerfile
│   ├── .env
│   └── package.json
├── Payment Service (Nest.js)/
│   ├── src/
│   │   ├── common
│   │   ├── filters
│   │   ├── guards
│   │   ├── payment
│   │   ├── schemas
│   │   └── wallets
│   ├── Dockerfile
│   ├── .env
│   └── package.json
├── .gitignore
├── docker-compose.yaml
├── package.json
└── README.md

All the services are using nest.js so all dependencies are expected to be installed.

Technologies Used

• Node.js
• Nest.js
• Typescript
• Mongo
• Docker
• RxJs

User Service

This service is responsible for managing users. The following endpoints are available

• POST /users

• POST /wallets - communicates with payment service

• GET /users/:id

• GET /payments/:id - communicates with payment service

• GET /wallets/:id- communicates with payment service

Authentication Service

This service is responsible for authenticating registered users. It's used by both user and payment services. It has the following routes.

• POST /login

• RPC ({ role: 'auth', cmd: 'check' }) - Verifies JWT token

Payment Service

The payment service is responsible for generating wallets and processing all forms of payments. The service has the following endpoints

• POST /wallets/fund

• POST /initiate

• POST /payment/refund

• GET /paymets/verify/:id

• RPC ({ role: 'wallets', cmd: 'create' })

• RPC ({ role: 'wallets', cmd: 'get' })

• RPC ({ role: 'payments', cmd: 'get' })