wallet-challange

Starting the web-server:

1. Creating a your own configuration file app.config.js using app.config.example.js

2. Executing the following commands:

npm install
npm run build
npm run serve

Creditionals for the default admin user with full access:

• login: admin
• password: admin

A few points about the solution:

• esbuild and gulp is used for building workflow;
• when initializing the database schema, 4 basic roles are generated, starting from having no access (1) and ending with a role with full access to all endpoints (4);
• UUID v4 is used to generate tokens for sessions;
• Token HTTP header is used to transmit the session token. Request parameters are accepted in query string format both in URL or in request body.
• /wallet/deposit and /wallet/withdraw endpoints use a separate worker-thread queue for all request to increase fault tolerance on heavy transaction load. Also these actions use mysql transactions to execute an atomic sequence of queries to solve concurrency problems