QUIK GAMING GO BACKEND DEVELOPER INTERVIEW

Configuration

Setup

You need to have Golang installed at the very least Go 1.16.

The easiest way to get started with the rest api in your local environment is to clone it using git:

git clone https://github.com/Yaska1706/quik-gaming-interview.git

Environment Variables

You need to configure environment variables for the rest api to work as expected.

Copy the content on .env_example to .env file cat .env_example > .env

The .env file should look like this:

# database configurations
DB_DRIVER = "mysql"
DB_HOST = "localhost"
DB_PORT = "5432"
DB_USER = "root"
DB_NAME = "wallet_player"
DB_PASSWORD = ""

# port for app to listen and serve
LISTEN_ADDRESS = "127.0.0.1"
LISTEN_PORT = "8080"

# Logging file
LOG_FILE = "wallet.log"

# redis configuration
REDIS_ADDRESS = "127.0.0.1"
REDIS_PORT = "6379"

You can change the values to your own preference.

Run

To run the REST api you need to run this on the terminal so as to download the required dependancies:

make deps

Run the application

make run

Task

The goal is to write a JSON API in Golang to get the balance and manage credit/debit operations on the players wallets. For example, you might receive calls on your API to get the balance of the wallet with id 123, or to credit the wallet with id 456 by 10.00 €. The storage mechanism to use will be MySQL.

Below are the 3 endpoints to implement, as well as the business rules. Endpoints

• balance : retrieves the balance of a given wallet id

GET /api/v1/wallets/{wallet_id}/balance

• credit : credits money on a given wallet id

POST / api/v1/wallets/{wallet_id}/credit

• debit : debits money from a given wallet id

POST / api/v1/wallets/{wallet_id}/debit

Business rules

• A wallet balance cannot go below 0.
• Amounts sent in the credit and debit operations cannot be negative.

Results

DEBIT

{
    "data": "debit created",
    "status": "success",
    "amount": "4000"
}

CREDIT

{
    
    "data": "credit successful",
    "status": "success",
    "amount": "3000"

}

Balance

{
    "balance": "1000"
}