Feat/otp mechanism

src/database/migrations/20230214055456-create-otps.js

@@ -0,0 +1,49 @@
+/** @type {import('sequelize-cli').Migration} */
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    await queryInterface.createTable("otps", {
+      id: {
+        allowNull: false,
+        autoIncrement: true,
+        primaryKey: true,
+        type: Sequelize.INTEGER,
+      },
+      email: {
+        allowNull: true,
+        unique: true,
+        type: Sequelize.STRING,
+      },
+      mobile_number: {
+        allowNull: true,
+        unique: true,
+        type: Sequelize.STRING,
+      },
+      hashed_otp: {
+        allowNull: false,
+        validate: {
+          notEmpty: true,
+        },
+        type: Sequelize.STRING,
+      },
+      attempts: {
+        allowNull: false,
+        type: Sequelize.INTEGER,
+      },
+      expires_at: {
+        allowNull: false,
+        type: Sequelize.DATE,
+      },
+      created_at: {
+        allowNull: false,
+        type: Sequelize.DATE,
+      },
+      updated_at: {
+        allowNull: false,
+        type: Sequelize.DATE,
+      },
+    })
+  },
+  async down(queryInterface, Sequelize) {
+    await queryInterface.dropTable("otps")
+  },
+}

src/database/models/Otp.ts

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+import {
+  Column,
+  CreatedAt,
+  DataType,
+  Model,
+  Table,
+  UpdatedAt,
+} from "sequelize-typescript"
+
+@Table({ tableName: "otps" })
+export class Otp extends Model {
+  @Column({
+    autoIncrement: true,
+    primaryKey: true,
+    allowNull: false,
+    type: DataType.BIGINT,
+  })
+  id!: number
+
+  @Column({
+    allowNull: true,
+    unique: true,
+    type: DataType.TEXT,
+  })
+  email?: string | null
+
+  @Column({
+    allowNull: true,
+    unique: true,
+    type: DataType.TEXT,
+  })
+  mobileNumber?: string | null
+
+  @Column({
+    allowNull: false,
+    type: DataType.TEXT,
+    validate: {
+      notEmpty: true,
+    },
+  })
+  hashedOtp!: string
+
+  // tracks number of times user attempts to submit the OTP code and log in
+  @Column({
+    type: DataType.INTEGER,
+    defaultValue: 0,
+  })
+  attempts!: number
+
+  @Column({
+    allowNull: false,
+    type: DataType.DATE,
+  })
+  expiresAt!: Date
+
+  @CreatedAt
+  createdAt!: Date
+
+  @UpdatedAt
+  updatedAt!: Date
+}