Coding Test

• Deposit to specify user wallet
• Withdraw from specify user wallet
• Transfer from one user to another user
• Get specify user balance
• Get specify user transaction history

Preparing the environment

• Postgres
• Redis

Installation steps

Before use, PostgreSQL and Docker need to be prepared. Of course, you can also build binary programs directly without using Docker. Thank you

Step 1: Create Db And Import Script

There are an SQL scripts in the scripts directory. Please create a database named app and import these two scripts into the database

Step 2: Check Config

Please check the configuration information of the config file in the config directory and modify the configuration according to your actual situation

db:
    host: 127.0.0.1
    user: postgres
    password: hs2024!@#
    database: app
redis:
    addr: 192.168.31.106:6379
    password: ""
    db: 0

Step 3: Create an image

docker build -t app .

Step 4: Run the image

docker run -it -d -p 9090:9090 app

The forwarded port is 9090, you can adjust it according to the actual situation, and the default remains unchanged

Some things that have been done

• Completed golangci-lint verification
• Provides a json script for the Postman interface
• Provides Dockerfile image building, although it is a very simple deployment

Some work that has not been implemented but is under consideration, I need to consider some time costs

• When adding or subtracting balance, a distributed lock is used and no renewal is done
• There is a data table t_transaction that may have performance problems in the later stage of the project. You can adapt to the actual scenario.
• No cache is used in querying balances and historical transactions, so consistency issues need to be considered, such as the initial time cost.

Support

For support, email huangsheng7638@gmail.com or commit issue! Developer: Huang Sheng