@MFAFirstEnabledHook()

Package: @nauth-toolkit/nestjs Type: Class Decorator

Class decorator that automatically registers a provider as an MFA first enabled hook. Executes when user enables their first MFA device. Non-blocking - errors are logged but don't affect enrollment.

Not in Main Barrel Export

MFAFirstEnabledHook is not exported from the @nauth-toolkit/nestjs main entry point. Register this hook manually using HookRegistryService instead of the decorator pattern.

Overview

The @MFAFirstEnabledHook() decorator enables automatic hook registration. Classes decorated with this decorator are discovered at module initialization and registered with the HookRegistryService.

Key Features:

• Automatic hook discovery and registration
• Full dependency injection support
• Priority-based execution ordering
• Non-blocking - errors don't affect enrollment

Usage

Basic Hook

import { Injectable } from '@nestjs/common';
import {
  MFAFirstEnabledHook,
  IMFAFirstEnabledHook,
  MFAFirstEnabledMetadata,
} from '@nauth-toolkit/nestjs';

@Injectable()
@MFAFirstEnabledHook()
export class MFAFirstEnabledConfirmationHook implements IMFAFirstEnabledHook {
  constructor(private readonly emailService: EmailService) {}

  async execute(metadata: MFAFirstEnabledMetadata): Promise<void> {
    await this.emailService.sendMFAEnabledCongratulationsEmail({
      to: metadata.user.email,
      method: metadata.firstMethod,
    });
  }
}

With Priority

@Injectable()
@MFAFirstEnabledHook({ priority: 1 })
export class MFAFirstEnabledEmailHook implements IMFAFirstEnabledHook {
  // Executes first
}

Default Priority: 100

Module Registration

import { Module } from '@nestjs/common';
import { AuthModule, NAuthHooksModule } from '@nauth-toolkit/nestjs';
import { MFAFirstEnabledConfirmationHook } from './hooks/mfa-first-enabled.hook';

@Module({
  imports: [
    AuthModule.forRoot(authConfig),
    NAuthHooksModule.forFeature([MFAFirstEnabledConfirmationHook]),
  ],
})
export class CustomAuthModule {}

Related

• IMFAFirstEnabledHook - Hook interface
• HookRegistryService - Hook registry
• Lifecycle Hooks Guide - Complete hooks overview