2.2.4.2 Example Model (User)

// src/models/User.js
const { DataTypes } = require('sequelize');
const sequelize = require('../config/db');

const User = sequelize.define('User', {
  username: {
    type: DataTypes.STRING,
    allowNull: false,
    unique: true
  },
  email: {
    type: DataTypes.STRING,
    unique: true,
    allowNull: false
  },
  passwordHash: {
    type: DataTypes.STRING,
    allowNull: false
  },
  walletAddress: {
    type: DataTypes.STRING,
    allowNull: true
  },
  role: {
    type: DataTypes.ENUM('USER', 'ADMIN', 'TRADER'),
    defaultValue: 'USER'
  }
}, {
  tableName: 'Users'
});

module.exports = User;