Merge pull request #85 from Zod-Alkhair/feature/notification-system-fcm-registration

feat: refine transaction notification listener for improved balance c…

src/auth/dtos/request/junior-login.request.dto.ts

@@ -1,5 +1,5 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsEmail, IsString } from 'class-validator';
+import { IsEmail, IsOptional, IsString } from 'class-validator';
 import { i18nValidationMessage as i18n } from 'nestjs-i18n';
 export class JuniorLoginRequestDto {
   @ApiProperty({ example: 'test@junior.com' })
@@ -9,4 +9,27 @@ export class JuniorLoginRequestDto {
   @ApiProperty({ example: 'Abcd1234@' })
   @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.password' }) })
   password!: string;
+
+  @ApiProperty({ example: 'device-123', description: 'Unique device identifier', required: false })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.deviceId' }) })
+  deviceId?: string;
+
+  @ApiProperty({
+    example: 'cXYzABC:APA91bHunvwY7rKpn8N7y6vDxS0qmQ5RZx2C8K...',
+    description: 'Firebase Cloud Messaging token for push notifications',
+    required: false,
+  })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.fcmToken' }) })
+  fcmToken?: string;
+
+  @ApiProperty({
+    example: 'Asia/Riyadh',
+    description: 'Device timezone (auto-detected from device OS)',
+    required: false,
+  })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.timezone' }) })
+  timezone?: string;
 }

src/auth/dtos/request/login.request.dto.ts

@@ -21,4 +21,27 @@ export class LoginRequestDto {
   @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.password' }) })
   @ValidateIf((o) => o.grantType === GrantType.PASSWORD)
   password!: string;
+
+  @ApiProperty({ example: 'device-123', description: 'Unique device identifier', required: false })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.deviceId' }) })
+  deviceId?: string;
+
+  @ApiProperty({
+    example: 'cXYzABC:APA91bHunvwY7rKpn8N7y6vDxS0qmQ5RZx2C8K...',
+    description: 'Firebase Cloud Messaging token for push notifications',
+    required: false,
+  })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.fcmToken' }) })
+  fcmToken?: string;
+
+  @ApiProperty({
+    example: 'Asia/Riyadh',
+    description: 'Device timezone (auto-detected from device OS)',
+    required: false,
+  })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.timezone' }) })
+  timezone?: string;
 }

src/auth/dtos/request/verify-user.request.dto.ts

@@ -101,4 +101,27 @@ export class VerifyUserRequestDto {
     message: i18n('validation.MinLength', { path: 'general', property: 'auth.otp', length: DEFAULT_OTP_LENGTH }),
   })
   otp!: string;
+
+  @ApiProperty({ example: 'device-123', description: 'Unique device identifier', required: false })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.deviceId' }) })
+  deviceId?: string;
+
+  @ApiProperty({
+    example: 'cXYzABC:APA91bHunvwY7rKpn8N7y6vDxS0qmQ5RZx2C8K...',
+    description: 'Firebase Cloud Messaging token for push notifications',
+    required: false,
+  })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.fcmToken' }) })
+  fcmToken?: string;
+
+  @ApiProperty({
+    example: 'Asia/Riyadh',
+    description: 'Device timezone (auto-detected from device OS)',
+    required: false,
+  })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.timezone' }) })
+  timezone?: string;
 }

src/auth/services/auth.service.ts

@@ -86,6 +86,12 @@ export class AuthService {
 
     const tokens = await this.generateAuthToken(user);
     this.logger.log(`User with phone number ${user.fullPhoneNumber} verified successfully`);
+
+    // Register/update device with FCM token and timezone if provided
+    if (verifyUserDto.fcmToken && verifyUserDto.deviceId) {
+      await this.registerDeviceToken(user.id, verifyUserDto.deviceId, verifyUserDto.fcmToken, verifyUserDto.timezone);
+    }
+
     return [tokens, user];
   }
 
@@ -271,6 +277,12 @@ export class AuthService {
 
     const tokens = await this.generateAuthToken(user);
     this.logger.log(`Password validated successfully for user`);
+
+    // Register/update device with FCM token and timezone if provided
+    if (loginDto.fcmToken && loginDto.deviceId) {
+      await this.registerDeviceToken(user.id, loginDto.deviceId, loginDto.fcmToken, loginDto.timezone);
+    }
+
     return [tokens, user];
   }
 
@@ -291,9 +303,76 @@ export class AuthService {
 
     const tokens = await this.generateAuthToken(user);
     this.logger.log(`Password validated successfully for user`);
+
+    // Register/update device with FCM token and timezone if provided
+    if (juniorLoginDto.fcmToken && juniorLoginDto.deviceId) {
+      await this.registerDeviceToken(user.id, juniorLoginDto.deviceId, juniorLoginDto.fcmToken, juniorLoginDto.timezone);
+    }
+
     return [tokens, user];
   }
 
+  /**
+   * Register or update device with FCM token and timezone
+   * This method handles:
+   * 1. Device already exists for this user → Update FCM token and timezone
+   * 2. Device exists for different user → Transfer device to new user
+   * 3. Device doesn't exist → Create new device
+   */
+  private async registerDeviceToken(userId: string, deviceId: string, fcmToken: string, timezone?: string): Promise<void> {
+    try {
+      this.logger.log(`Registering/updating device ${deviceId} with FCM token for user ${userId}`);
+
+      // Step 1: Check if device already exists for this user
+      const existingDeviceForUser = await this.deviceService.findUserDeviceById(deviceId, userId);
+
+      if (existingDeviceForUser) {
+        // Device exists for this user → Update FCM token, timezone, and last access time
+        await this.deviceService.updateDevice(deviceId, {
+          fcmToken,
+          userId,
+          timezone, // Update timezone if provided
+          lastAccessOn: new Date(),
+        });
+        this.logger.log(`Device ${deviceId} updated with new FCM token and timezone for user ${userId}`);
+        return;
+      }
+
+      // Step 2: Check if device exists for any user (different user scenario)
+      const existingDevice = await this.deviceService.findByDeviceId(deviceId);
+
+      if (existingDevice) {
+        // Device exists for different user → Transfer device to new user
+        this.logger.log(
+          `Device ${deviceId} exists for user ${existingDevice.userId}, transferring to user ${userId}`
+        );
+        await this.deviceService.updateDevice(deviceId, {
+          userId,
+          fcmToken,
+          timezone, // Update timezone if provided
+          lastAccessOn: new Date(),
+        });
+        this.logger.log(`Device ${deviceId} transferred from user ${existingDevice.userId} to user ${userId}`);
+        return;
+      }
+
+      // Step 3: Device doesn't exist → Create new device
+      await this.deviceService.createDevice({
+        deviceId,
+        userId,
+        fcmToken,
+        timezone, // Store timezone if provided
+        lastAccessOn: new Date(),
+      });
+      this.logger.log(`New device ${deviceId} registered with FCM token for user ${userId}`);
+    } catch (error) {
+      // Log error but don't fail the login/signup process
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      const errorStack = error instanceof Error ? error.stack : undefined;
+      this.logger.error(`Failed to register device token for user ${userId}: ${errorMessage}`, errorStack);
+    }
+  }
+
   private async generateAuthToken(user: User) {
     this.logger.log(`Generating auth token for user with id ${user.id}`);
     const [accessToken, refreshToken] = await Promise.all([

src/card/card.module.ts

@@ -27,7 +27,7 @@ import { TransactionService } from './services/transaction.service';
     AccountService,
     AccountRepository,
   ],
-  exports: [CardService, TransactionService],
+  exports: [CardService, TransactionService, AccountService],
   controllers: [CardsController],
 })
 export class CardModule {}

src/card/repositories/card.repository.ts

@@ -42,7 +42,18 @@ export class CardRepository {
   }
 
   getCardById(id: string): Promise<Card | null> {
-    return this.cardRepository.findOne({ where: { id }, relations: ['account'] });
+    return this.cardRepository.findOne({
+      where: { id },
+      relations: [
+        'account',
+        'customer',
+        'customer.user',
+        'customer.junior',
+        'customer.junior.guardian',
+        'customer.junior.guardian.customer',
+        'customer.junior.guardian.customer.user',
+      ],
+    });
   }
 
   findCardByChildId(guardianId: string, childId: string): Promise<Card | null> {
@@ -59,14 +70,30 @@ export class CardRepository {
   getCardByVpan(vpan: string): Promise<Card | null> {
     return this.cardRepository.findOne({
       where: { vpan },
-      relations: ['account'],
+      relations: [
+        'account',
+        'customer',
+        'customer.user',
+        'customer.junior',
+        'customer.junior.guardian',
+        'customer.junior.guardian.customer',
+        'customer.junior.guardian.customer.user',
+      ],
     });
   }
 
   getCardByCustomerId(customerId: string): Promise<Card | null> {
     return this.cardRepository.findOne({
       where: { customerId },
-      relations: ['account'],
+      relations: [
+        'account',
+        'customer',
+        'customer.user',
+        'customer.junior',
+        'customer.junior.guardian',
+        'customer.junior.guardian.customer',
+        'customer.junior.guardian.customer.user',
+      ],
     });
   }
 

src/card/services/card.service.ts

@@ -1,6 +1,9 @@
 import { BadRequestException, forwardRef, Inject, Injectable, Logger } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import Decimal from 'decimal.js';
 import { Transactional } from 'typeorm-transactional';
+import { NOTIFICATION_EVENTS } from '~/common/modules/notification/constants/event-names.constant';
+import { ICardBlockedEvent, ICardCreatedEvent } from '~/common/modules/notification/interfaces/notification-events.interface';
 import { AccountCardStatusChangedWebhookRequest } from '~/common/modules/neoleap/dtos/requests';
 import { NeoLeapService } from '~/common/modules/neoleap/services';
 import { Customer } from '~/customer/entities';
@@ -8,7 +11,7 @@ import { KycStatus } from '~/customer/enums';
 import { CustomerService } from '~/customer/services';
 import { OciService } from '~/document/services';
 import { Card } from '../entities';
-import { CardColors } from '../enums';
+import { CardColors, CardStatus } from '../enums';
 import { CardStatusMapper } from '../mappers/card-status.mapper';
 import { CardRepository } from '../repositories';
 import { AccountService } from './account.service';
@@ -24,6 +27,7 @@ export class CardService {
     @Inject(forwardRef(() => TransactionService)) private readonly transactionService: TransactionService,
     @Inject(forwardRef(() => NeoLeapService)) private readonly neoleapService: NeoLeapService,
     @Inject(forwardRef(() => CustomerService)) private readonly customerService: CustomerService,
+    private readonly eventEmitter: EventEmitter2,
   ) {}
 
   @Transactional()
@@ -58,7 +62,16 @@ export class CardService {
     const account = await this.accountService.createAccount(data);
     const createdCard = await this.cardRepository.createCard(customerId, account.id, data);
 
-    return this.getCardById(createdCard.id);
+    const cardWithRelations = await this.getCardById(createdCard.id);
+    
+    const event: ICardCreatedEvent = {
+      card: cardWithRelations,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.CARD_CREATED, event);
+    this.logger.log(`Emitted CARD_CREATED event for card ${cardWithRelations.id}`);
+
+    return cardWithRelations;
   }
 
   async getChildCards(guardianId: string): Promise<Card[]> {
@@ -77,7 +90,16 @@ export class CardService {
       parentCustomer.id,
     );
 
-    return this.getCardById(createdCard.id);
+    const cardWithRelations = await this.getCardById(createdCard.id);
+    
+    const event: ICardCreatedEvent = {
+      card: cardWithRelations,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.CARD_CREATED, event);
+    this.logger.log(`Emitted CARD_CREATED event for child card ${cardWithRelations.id}`);
+
+    return cardWithRelations;
   }
 
   async getCardByChildId(guardianId: string, childId: string): Promise<Card> {
@@ -128,9 +150,24 @@ export class CardService {
 
   async updateCardStatus(body: AccountCardStatusChangedWebhookRequest) {
     const card = await this.getCardByVpan(body.cardId);
+    const previousStatus = card.status;
     const { description, status } = CardStatusMapper[body.newStatus] || CardStatusMapper['99'];
 
-    return this.cardRepository.updateCardStatus(card.id, status, description);
+    await this.cardRepository.updateCardStatus(card.id, status, description);
+
+    if (status === CardStatus.BLOCKED) {
+      const updatedCard = await this.getCardById(card.id);
+      const event: ICardBlockedEvent = {
+        card: updatedCard,
+        previousStatus,
+        blockReason: description,
+        timestamp: new Date(),
+      };
+      this.eventEmitter.emit(NOTIFICATION_EVENTS.CARD_BLOCKED, event);
+      this.logger.log(`Emitted CARD_BLOCKED event for card ${updatedCard.id}`);
+    }
+
+    return { id: card.id, status, description };
   }
 
   async getEmbossingInformation(customerId: string) {
@@ -179,14 +216,44 @@ export class CardService {
       throw new BadRequestException('CARD.INSUFFICIENT_BALANCE');
     }
 
-    const finalAmount = Decimal(amount).plus(card.limit);
+    // Validate card reference exists
+    if (!card.cardReference) {
+      this.logger.error(`Card ${card.id} does not have a cardReference`);
+      throw new BadRequestException('CARD.INVALID_CARD_REFERENCE');
+    }
+
+    // Validate card limit is a valid number
+    const cardLimit = card.limit || 0;
+    if (isNaN(cardLimit) || cardLimit < 0) {
+      this.logger.error(`Card ${card.id} has invalid limit: ${cardLimit}`);
+      throw new BadRequestException('CARD.INVALID_CARD_LIMIT');
+    }
+
+    const finalAmount = Decimal(amount).plus(cardLimit);
+    const finalAmountNumber = finalAmount.toNumber();
+
+    // Validate final amount is positive
+    if (finalAmountNumber <= 0 || !isFinite(finalAmountNumber)) {
+      this.logger.error(`Invalid final amount calculated: ${finalAmountNumber} (amount: ${amount}, limit: ${cardLimit})`);
+      throw new BadRequestException('CARD.INVALID_AMOUNT');
+    }
+
+    this.logger.debug(`Updating card control - cardReference: ${card.cardReference}, finalAmount: ${finalAmountNumber}`);
+    
+    // First, ensure all external operations succeed before creating transaction
     await Promise.all([
-      this.neoleapService.updateCardControl(card.cardReference, finalAmount.toNumber()),
-      this.updateCardLimit(card.id, finalAmount.toNumber()),
+      this.neoleapService.updateCardControl(card.cardReference, finalAmountNumber),
+      this.updateCardLimit(card.id, finalAmountNumber),
       this.accountService.increaseReservedBalance(fundingAccount, amount),
-      this.transactionService.createInternalChildTransaction(card.id, amount),
+      // Increase child account balance
+      this.accountService.creditAccountBalance(card.account.accountReference, amount),
+      // Decrease parent account balance (only if parent is funding)
+      card.parentId ? this.accountService.decreaseAccountBalance(fundingAccount.accountReference, amount) : Promise.resolve(),
     ]);
 
+    // Only create transaction and emit event after all operations succeed
+    await this.transactionService.createInternalChildTransaction(card.id, amount);
+
     return finalAmount.toNumber();
   }
 

src/card/services/transaction.service.ts

@@ -1,4 +1,5 @@
 import { forwardRef, Inject, Injectable, UnprocessableEntityException } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import Decimal from 'decimal.js';
 import moment from 'moment';
 import { Transactional } from 'typeorm-transactional';
@@ -6,6 +7,8 @@ import {
   AccountTransactionWebhookRequest,
   CardTransactionWebhookRequest,
 } from '~/common/modules/neoleap/dtos/requests';
+import { NOTIFICATION_EVENTS } from '~/common/modules/notification/constants/event-names.constant';
+import { ITransactionCreatedEvent } from '~/common/modules/notification/interfaces/notification-events.interface';
 import { Transaction } from '../entities/transaction.entity';
 import { CustomerType, TransactionType } from '../enums';
 import { TransactionRepository } from '../repositories/transaction.repository';
@@ -27,6 +30,7 @@ export class TransactionService {
     private readonly transactionRepository: TransactionRepository,
     private readonly accountService: AccountService,
     @Inject(forwardRef(() => CardService)) private readonly cardService: CardService,
+    private readonly eventEmitter: EventEmitter2,
   ) {}
 
   @Transactional()
@@ -58,6 +62,15 @@ export class TransactionService {
       await this.accountService.decreaseAccountBalance(card.account.accountReference, total.toNumber());
     }
 
+    const event: ITransactionCreatedEvent = {
+      transaction,
+      card,
+      isTopUp: false,
+      isChildSpending: card.customerType === CustomerType.CHILD,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.TRANSACTION_CREATED, event);
+
     return transaction;
   }
 
@@ -74,12 +87,44 @@ export class TransactionService {
     const transaction = await this.transactionRepository.createAccountTransaction(account, body);
     await this.accountService.creditAccountBalance(account.accountReference, body.amount);
 
+    const accountWithCards = await this.accountService.getAccountByAccountNumber(body.accountId);
+    const card = accountWithCards.cards?.[0] 
+      ? await this.cardService.getCardById(accountWithCards.cards[0].id)
+      : null;
+
+    if (card) {
+      const event: ITransactionCreatedEvent = {
+        transaction,
+        card,
+        isTopUp: true,
+        isChildSpending: false,
+        timestamp: new Date(),
+      };
+      this.eventEmitter.emit(NOTIFICATION_EVENTS.TRANSACTION_CREATED, event);
+    }
+
     return transaction;
   }
 
   async createInternalChildTransaction(cardId: string, amount: number) {
     const card = await this.cardService.getCardById(cardId);
     const transaction = await this.transactionRepository.createInternalChildTransaction(card, amount);
+    
+    // Reload card to get updated account balance after the transfer
+    const cardWithUpdatedBalance = await this.cardService.getCardById(cardId);
+    
+    const event: ITransactionCreatedEvent = {
+      transaction,
+      card: cardWithUpdatedBalance, // Use card with updated balance
+      isTopUp: true,
+      isChildSpending: true,
+      timestamp: new Date(),
+    };
+    
+    console.log(`[TransactionService] Emitting TRANSACTION_CREATED event for transaction ${transaction.id}`);
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.TRANSACTION_CREATED, event);
+    console.log(`[TransactionService] Event emitted successfully`);
+    
     return transaction;
   }
 

src/common/modules/neoleap/services/neoleap.service.ts

@@ -427,10 +427,18 @@ export class NeoLeapService {
       });
     } catch (error: any) {
       if (error.status === 400) {
-        console.error('Error sending request to NeoLeap:', error);
-        throw new BadRequestException(error.response?.data?.ResponseHeader?.ResponseDescription || error.message);
+        const errorMessage = error.response?.data?.ResponseHeader?.ResponseDescription || 
+                            error.response?.data?.message || 
+                            error.message;
+        const errorCode = error.response?.data?.ResponseHeader?.ResponseCode || 'UNKNOWN';
+        this.logger.error(
+          `NeoLeap API returned 400 error for endpoint ${endpoint}. ` +
+          `Error Code: ${errorCode}, Message: ${errorMessage}. ` +
+          `Payload: ${JSON.stringify(payload)}`
+        );
+        throw new BadRequestException(errorMessage || 'Request failed with status code 400');
       }
-      console.error('Error sending request to NeoLeap:', error);
+      this.logger.error(`Error sending request to NeoLeap endpoint ${endpoint}:`, error);
       throw new InternalServerErrorException('Error communicating with NeoLeap service');
     }
   }

src/common/modules/notification/constants/event-names.constant.ts

@@ -0,0 +1,37 @@
+/**
+ * Notification event names
+ * These are the event identifiers used throughout the notification system
+ */
+export const NOTIFICATION_EVENTS = {
+  // Transaction events
+  TRANSACTION_CREATED: 'notification.transaction.created',
+  
+  // Money Request events
+  MONEY_REQUEST_CREATED: 'notification.money-request.created',
+  MONEY_REQUEST_APPROVED: 'notification.money-request.approved',
+  MONEY_REQUEST_DECLINED: 'notification.money-request.declined',
+  
+  // KYC Update events
+  KYC_APPROVED: 'notification.kyc.approved',
+  KYC_REJECTED: 'notification.kyc.rejected',
+  
+  // Card Status events
+  CARD_CREATED: 'notification.card.created',
+  CARD_BLOCKED: 'notification.card.blocked',
+  CARD_REISSUED: 'notification.card.reissued',
+  
+  // Profile Update events
+  PROFILE_UPDATED: 'notification.profile.updated',
+  
+  // System Alert events
+  MAINTENANCE_ALERT: 'notification.system.maintenance',
+  TRANSACTION_FAILED: 'notification.system.transaction-failed',
+  SUSPICIOUS_LOGIN: 'notification.system.suspicious-login',
+} as const;
+
+export type NotificationEventName = 
+  typeof NOTIFICATION_EVENTS[keyof typeof NOTIFICATION_EVENTS];
+
+
+
+

src/common/modules/notification/constants/index.ts

@@ -0,0 +1,3 @@
+// Export all constants from this folder
+export * from './event-names.constant';
+

src/common/modules/notification/dtos/response/notifications.response.dto.ts

@@ -23,6 +23,17 @@ export class NotificationsResponseDto {
     this.title = notification.title;
     this.body = notification.message;
     this.status = notification.status!;
-    this.createdAt = notification.createdAt;
+    
+    // Use event timestamp from data if available, otherwise use notification creation time
+    // This ensures notifications show when the event occurred, not when notification was saved
+    // Note: Timestamps are stored in UTC. The client should convert to the user's local timezone.
+    if (notification.data?.timestamp) {
+      // Parse the ISO string timestamp (which is in UTC)
+      // The client should convert this to the user's local timezone based on their device settings
+      this.createdAt = new Date(notification.data.timestamp);
+    } else {
+      // Use notification creation time (also in UTC)
+      this.createdAt = notification.createdAt;
+    }
   }
 }

src/common/modules/notification/entities/notification.entity.ts

@@ -36,6 +36,9 @@ export class Notification {
   @Column('uuid', { name: 'user_id', nullable: true })
   userId!: string;
 
+  @Column('jsonb', { name: 'data', nullable: true })
+  data?: Record<string, any>;
+
   @ManyToOne(() => User, (user) => user.notifications, { onDelete: 'CASCADE', nullable: true })
   @JoinColumn({ name: 'user_id' })
   user!: User;

src/common/modules/notification/enums/notification-scope.enum.ts

@@ -1,7 +1,63 @@
 export enum NotificationScope {
+  // Existing scopes
   USER_REGISTERED = 'USER_REGISTERED',
   TASK_COMPLETED = 'TASK_COMPLETED',
   GIFT_RECEIVED = 'GIFT_RECEIVED',
   OTP = 'OTP',
   USER_INVITED = 'USER_INVITED',
+
+  // Transaction notifications - Top-up
+  CHILD_TOP_UP = 'CHILD_TOP_UP',
+  PARENT_TOP_UP_CONFIRMATION = 'PARENT_TOP_UP_CONFIRMATION',
+
+  // Transaction notifications - Spending
+  CHILD_SPENDING = 'CHILD_SPENDING',
+  PARENT_SPENDING_ALERT = 'PARENT_SPENDING_ALERT',
+
+  // Money Request notifications
+  MONEY_REQUEST_CREATED = 'MONEY_REQUEST_CREATED',
+  MONEY_REQUEST_APPROVED = 'MONEY_REQUEST_APPROVED',
+  MONEY_REQUEST_DECLINED = 'MONEY_REQUEST_DECLINED',
+
+  // KYC Update notifications
+  KYC_APPROVED = 'KYC_APPROVED',
+  KYC_REJECTED = 'KYC_REJECTED',
+
+  // Card Status notifications
+  CARD_CREATED = 'CARD_CREATED',
+  CARD_BLOCKED = 'CARD_BLOCKED',
+  CARD_REISSUED = 'CARD_REISSUED',
+
+  // Profile Update notifications
+  PROFILE_UPDATED = 'PROFILE_UPDATED',
+
+  // System Alert notifications
+  MAINTENANCE_ALERT = 'MAINTENANCE_ALERT',
+  TRANSACTION_FAILED = 'TRANSACTION_FAILED',
+  SUSPICIOUS_LOGIN = 'SUSPICIOUS_LOGIN',
 }
+
+/**
+ * Critical notification scopes that require guaranteed delivery
+ * These will use RabbitMQ/Kafka instead of Redis PubSub when configured
+ * 
+ * Add scopes here when you need guaranteed delivery for specific notification types
+ * Examples:
+ * - ACCOUNT_LOCKED
+ * - SUSPICIOUS_ACTIVITY
+ * - LARGE_TRANSACTION_ALERT
+ * - PAYMENT_FAILED
+ */
+export const CRITICAL_NOTIFICATION_SCOPES = new Set<NotificationScope>([
+  // Add critical scopes here as needed
+  // Example: NotificationScope.ACCOUNT_LOCKED,
+]);
+
+/**
+ * Check if a notification scope requires guaranteed delivery
+ * @param scope - Notification scope to check
+ * @returns true if the scope requires guaranteed delivery
+ */
+export function requiresGuaranteedDelivery(scope: NotificationScope): boolean {
+  return CRITICAL_NOTIFICATION_SCOPES.has(scope);
+}

src/common/modules/notification/interfaces/index.ts

@@ -1 +1,3 @@
 export * from './notification-page-meta.interface';
+export * from './notification-events.interface';
+export * from './messaging-system.interface';

src/common/modules/notification/interfaces/messaging-system.interface.ts

@@ -0,0 +1,25 @@
+/**
+ * Interface for messaging systems (Redis PubSub, RabbitMQ, Kafka, etc.)
+ * Allows switching between different messaging systems based on notification requirements
+ */
+export interface IMessagingSystem {
+  /**
+   * Publish a notification event
+   * @param channel - Channel/topic name
+   * @param payload - Notification payload
+   */
+  publish(channel: string, payload: any): Promise<void>;
+  
+  /**
+   * Subscribe to a channel
+   * @param channel - Channel/topic name
+   * @param handler - Message handler function
+   */
+  subscribe(channel: string, handler: (message: any) => Promise<void>): Promise<void>;
+  
+  /**
+   * Get system name (for logging)
+   */
+  getName(): string;
+}
+

src/common/modules/notification/interfaces/notification-events.interface.ts

@@ -0,0 +1,221 @@
+import { Transaction } from '~/card/entities/transaction.entity';
+import { Card } from '~/card/entities/card.entity';
+import { MoneyRequest } from '~/money-request/entities/money-request.entity';
+import { Customer } from '~/customer/entities';
+import { KycStatus } from '~/customer/enums';
+
+/**
+ * Event payload for when a transaction is created
+ * Used to notify users about transactions (spending or top-ups)
+ */
+export interface ITransactionCreatedEvent {
+  /** The transaction that was created */
+  transaction: Transaction;
+  
+  /** The card used in the transaction (with all relations loaded) */
+  card: Card;
+  
+  /** True if this is a top-up/load transaction, false if spending */
+  isTopUp: boolean;
+  
+  /** True if this transaction was made by a child (requires parent notification) */
+  isChildSpending: boolean;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a money request is created
+ * Used to notify parents when their child requests money
+ */
+export interface IMoneyRequestCreatedEvent {
+  /** The money request that was created */
+  moneyRequest: MoneyRequest;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a money request is approved
+ * Used to notify children when their money request is approved
+ */
+export interface IMoneyRequestApprovedEvent {
+  /** The money request that was approved */
+  moneyRequest: MoneyRequest;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a money request is declined
+ * Used to notify children when their money request is declined
+ */
+export interface IMoneyRequestDeclinedEvent {
+  /** The money request that was declined */
+  moneyRequest: MoneyRequest;
+  
+  /** Rejection reason provided by parent */
+  rejectionReason?: string;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when KYC is approved
+ * Used to notify users when their KYC verification is approved
+ */
+export interface IKycApprovedEvent {
+  /** The customer whose KYC was approved */
+  customer: Customer;
+  
+  /** Previous KYC status */
+  previousStatus: KycStatus;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when KYC is rejected
+ * Used to notify users when their KYC verification is rejected
+ */
+export interface IKycRejectedEvent {
+  /** The customer whose KYC was rejected */
+  customer: Customer;
+  
+  /** Previous KYC status */
+  previousStatus: KycStatus;
+  
+  /** Rejection reason (if provided) */
+  rejectionReason?: string;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a card is created
+ * Used to notify users when their card is successfully created
+ */
+export interface ICardCreatedEvent {
+  /** The card that was created */
+  card: Card;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a card is blocked
+ * Used to notify users when their card is blocked
+ */
+export interface ICardBlockedEvent {
+  /** The card that was blocked */
+  card: Card;
+  
+  /** Previous card status */
+  previousStatus: string;
+  
+  /** Block reason/description */
+  blockReason?: string;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a card is reissued
+ * Used to notify users when their card is reissued
+ */
+export interface ICardReissuedEvent {
+  /** The new card that was issued */
+  card: Card;
+  
+  /** The old card that was replaced */
+  oldCardId?: string;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for when a user profile is updated
+ * Used to notify users when their profile information is changed
+ */
+export interface IProfileUpdatedEvent {
+  /** The user whose profile was updated */
+  user: any;
+  
+  /** Fields that were updated */
+  updatedFields: string[];
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for system maintenance alerts
+ * Used to notify users about scheduled or unscheduled maintenance
+ */
+export interface IMaintenanceAlertEvent {
+  /** User ID to notify (null for broadcast to all users) */
+  userId: string | null;
+  
+  /** Maintenance message */
+  message: string;
+  
+  /** Scheduled start time */
+  startTime?: Date;
+  
+  /** Scheduled end time */
+  endTime?: Date;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for failed transaction alerts
+ * Used to notify users when a transaction fails
+ */
+export interface ITransactionFailedEvent {
+  /** The user whose transaction failed */
+  userId: string;
+  
+  /** Transaction details */
+  transactionId?: string;
+  
+  /** Failure reason */
+  reason: string;
+  
+  /** Transaction amount (if applicable) */
+  amount?: number;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}
+
+/**
+ * Event payload for suspicious login detection
+ * Used to notify users about suspicious login attempts
+ */
+export interface ISuspiciousLoginEvent {
+  /** The user whose account had suspicious activity */
+  userId: string;
+  
+  /** IP address of the login attempt */
+  ipAddress?: string;
+  
+  /** Location of the login attempt */
+  location?: string;
+  
+  /** Device information */
+  device?: string;
+  
+  /** When the event occurred */
+  timestamp: Date;
+}

src/common/modules/notification/listeners/card-notification.listener.ts

@@ -0,0 +1,162 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { I18nService } from 'nestjs-i18n';
+import { NotificationFactory, NotificationPreferences } from '../services/notification-factory.service';
+import { UserService } from '~/user/services/user.service';
+import { NOTIFICATION_EVENTS } from '../constants/event-names.constant';
+import { ICardBlockedEvent, ICardCreatedEvent } from '../interfaces/notification-events.interface';
+import { NotificationScope } from '../enums/notification-scope.enum';
+import { User } from '~/user/entities';
+import { UserLocale } from '~/core/enums/user-locale.enum';
+
+@Injectable()
+export class CardNotificationListener {
+  private readonly logger = new Logger(CardNotificationListener.name);
+
+  constructor(
+    private readonly notificationFactory: NotificationFactory,
+    private readonly userService: UserService,
+    private readonly i18n: I18nService,
+  ) {}
+
+  @OnEvent(NOTIFICATION_EVENTS.CARD_CREATED)
+  async handleCardCreated(event: ICardCreatedEvent): Promise<void> {
+    try {
+      const { card } = event;
+      const user = card?.customer?.user;
+
+      if (!user) {
+        this.logger.warn(`No user found for card ${card.id}, skipping card created notification`);
+        return;
+      }
+
+      const locale = this.getUserLocale(user);
+      const lastFourDigits = card.lastFourDigits;
+
+      let title: string;
+      let message: string;
+
+      try {
+        title = this.i18n.t('app.NOTIFICATION.CARD_CREATED_TITLE', { lang: locale });
+        message = this.i18n.t('app.NOTIFICATION.CARD_CREATED_MESSAGE', {
+          lang: locale,
+          args: {
+            lastFourDigits: lastFourDigits,
+          },
+        });
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[CardNotificationListener] i18n error for user ${user.id}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        title = 'Card Created';
+        message = `Your card ending in ${lastFourDigits} has been created successfully. You can start using it once it's activated.`;
+      }
+
+      this.logger.debug(
+        `Notifying user (user ${user.id}): Card created - ${lastFourDigits}`
+      );
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message,
+        scope: NotificationScope.CARD_CREATED,
+        preferences: this.getUserPreferences(user),
+        data: {
+          cardId: card.id,
+          lastFourDigits: lastFourDigits,
+          cardReference: card.cardReference,
+          status: card.status,
+          timestamp: event.timestamp.toISOString(),
+          action: 'VIEW_CARD',
+        },
+      });
+
+      this.logger.log(`✅ Notified user ${user.id} about card creation`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process card created notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  @OnEvent(NOTIFICATION_EVENTS.CARD_BLOCKED)
+  async handleCardBlocked(event: ICardBlockedEvent): Promise<void> {
+    try {
+      const { card, blockReason } = event;
+      const user = card?.customer?.user;
+
+      if (!user) {
+        this.logger.warn(`No user found for card ${card.id}, skipping card blocked notification`);
+        return;
+      }
+
+      const locale = this.getUserLocale(user);
+      const lastFourDigits = card.lastFourDigits;
+      const reason = blockReason || 'Card has been blocked';
+
+      let title: string;
+      let message: string;
+
+      try {
+        title = this.i18n.t('app.NOTIFICATION.CARD_BLOCKED_TITLE', { lang: locale });
+        message = this.i18n.t('app.NOTIFICATION.CARD_BLOCKED_MESSAGE', {
+          lang: locale,
+          args: {
+            lastFourDigits: lastFourDigits,
+            reason: reason,
+          },
+        });
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[CardNotificationListener] i18n error for user ${user.id}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        title = 'Card Blocked';
+        message = `Your card ending in ${lastFourDigits} has been blocked. Reason: ${reason}. Please contact support for assistance.`;
+      }
+
+      this.logger.debug(
+        `Notifying user (user ${user.id}): Card blocked - ${lastFourDigits}, reason: ${reason}`
+      );
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message,
+        scope: NotificationScope.CARD_BLOCKED,
+        preferences: this.getUserPreferences(user),
+        data: {
+          cardId: card.id,
+          lastFourDigits: lastFourDigits,
+          cardReference: card.cardReference,
+          status: card.status,
+          blockReason: reason,
+          timestamp: event.timestamp.toISOString(),
+          action: 'CONTACT_SUPPORT',
+        },
+      });
+
+      this.logger.log(`✅ Notified user ${user.id} about card being blocked`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process card blocked notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  private getUserPreferences(user: User): NotificationPreferences {
+    return {
+      isPushEnabled: user.isPushEnabled,
+      isEmailEnabled: user.isEmailEnabled,
+      isSmsEnabled: user.isSmsEnabled,
+    };
+  }
+
+  private getUserLocale(user: User): UserLocale {
+    return UserLocale.ENGLISH;
+  }
+}

src/common/modules/notification/listeners/index.ts

@@ -1 +1,7 @@
 export * from './notification-created.listener';
+export * from './transaction-notification.listener';
+export * from './money-request-notification.listener';
+export * from './kyc-notification.listener';
+export * from './card-notification.listener';
+export * from './profile-notification.listener';
+export * from './system-alert-notification.listener';

src/common/modules/notification/listeners/kyc-notification.listener.ts

@@ -0,0 +1,233 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { I18nService } from 'nestjs-i18n';
+import { NotificationFactory, NotificationPreferences } from '../services/notification-factory.service';
+import { UserService } from '~/user/services/user.service';
+import { NOTIFICATION_EVENTS } from '../constants/event-names.constant';
+import {
+  IKycApprovedEvent,
+  IKycRejectedEvent,
+} from '../interfaces/notification-events.interface';
+import { NotificationScope } from '../enums/notification-scope.enum';
+import { User } from '~/user/entities';
+import { UserLocale } from '~/core/enums/user-locale.enum';
+
+/**
+ * KycNotificationListener
+ * 
+ * Handles notifications for KYC update events.
+ * Notifies users when their KYC verification is approved or rejected.
+ * 
+ * Responsibilities:
+ * - Listen for KYC approval/rejection events
+ * - Determine notification recipient (the user whose KYC was updated)
+ * - Construct appropriate messages with rejection reason if applicable
+ * - Fetch user preferences
+ * - Call NotificationFactory to send
+ */
+@Injectable()
+export class KycNotificationListener {
+  private readonly logger = new Logger(KycNotificationListener.name);
+
+  constructor(
+    private readonly notificationFactory: NotificationFactory,
+    private readonly userService: UserService,
+    private readonly i18n: I18nService,
+  ) {}
+
+  /**
+   * Handle KYC approved event
+   * Notifies user when their KYC verification is approved
+   */
+  @OnEvent(NOTIFICATION_EVENTS.KYC_APPROVED)
+  async handleKycApproved(event: IKycApprovedEvent): Promise<void> {
+    try {
+      const { customer } = event;
+
+      this.logger.log(
+        `Processing KYC approved notification for customer ${customer.id}`
+      );
+
+      await this.notifyUserOfKycApproval(customer);
+
+      this.logger.log(
+        `KYC approved notification processed successfully for customer ${customer.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process KYC approved notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Handle KYC rejected event
+   * Notifies user when their KYC verification is rejected
+   */
+  @OnEvent(NOTIFICATION_EVENTS.KYC_REJECTED)
+  async handleKycRejected(event: IKycRejectedEvent): Promise<void> {
+    try {
+      const { customer, rejectionReason } = event;
+
+      this.logger.log(
+        `Processing KYC rejected notification for customer ${customer.id} - Reason: ${rejectionReason || 'Not provided'}`
+      );
+
+      await this.notifyUserOfKycRejection(customer, rejectionReason);
+
+      this.logger.log(
+        `KYC rejected notification processed successfully for customer ${customer.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process KYC rejected notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify user when their KYC is approved
+   */
+  private async notifyUserOfKycApproval(customer: any): Promise<void> {
+    try {
+      const user = customer?.user;
+      if (!user) {
+        this.logger.warn(`No user found for customer ${customer.id}, skipping notification`);
+        return;
+      }
+
+      const locale = this.getUserLocale(user);
+
+      let title: string;
+      let message: string;
+
+      try {
+        title = this.i18n.t('app.NOTIFICATION.KYC_APPROVED_TITLE', { lang: locale });
+        message = this.i18n.t('app.NOTIFICATION.KYC_APPROVED_MESSAGE', {
+          lang: locale,
+        });
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[KycNotificationListener] i18n error for user ${user.id}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        title = 'KYC Verification Approved';
+        message = 'Your KYC verification has been approved. You can now use all features of the app.';
+      }
+
+      this.logger.debug(
+        `Notifying user (user ${user.id}): KYC approved`
+      );
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message,
+        scope: NotificationScope.KYC_APPROVED,
+        preferences: this.getUserPreferences(user),
+        data: {
+          customerId: customer.id,
+          kycStatus: 'APPROVED',
+          timestamp: new Date().toISOString(),
+          type: 'KYC_APPROVED',
+          action: 'VIEW_PROFILE',
+        },
+      });
+
+      this.logger.log(`✅ Notified user ${user.id} about KYC approval`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify user of KYC approval: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify user when their KYC is rejected
+   */
+  private async notifyUserOfKycRejection(customer: any, rejectionReason?: string): Promise<void> {
+    try {
+      const user = customer?.user;
+      if (!user) {
+        this.logger.warn(`No user found for customer ${customer.id}, skipping notification`);
+        return;
+      }
+
+      const locale = this.getUserLocale(user);
+      const reason = rejectionReason || customer.rejectionReason || 'KYC verification failed';
+
+      let title: string;
+      let message: string;
+
+      try {
+        title = this.i18n.t('app.NOTIFICATION.KYC_REJECTED_TITLE', { lang: locale });
+        message = this.i18n.t('app.NOTIFICATION.KYC_REJECTED_MESSAGE', {
+          lang: locale,
+          args: {
+            reason: reason,
+          },
+        });
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[KycNotificationListener] i18n error for user ${user.id}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        title = 'KYC Verification Rejected';
+        message = `Your KYC verification has been rejected. Reason: ${reason}. Please review your information and try again.`;
+      }
+
+      this.logger.debug(
+        `Notifying user (user ${user.id}): KYC rejected - ${reason}`
+      );
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message,
+        scope: NotificationScope.KYC_REJECTED,
+        preferences: this.getUserPreferences(user),
+        data: {
+          customerId: customer.id,
+          kycStatus: 'REJECTED',
+          rejectionReason: reason,
+          timestamp: new Date().toISOString(),
+          type: 'KYC_REJECTED',
+          action: 'RETRY_KYC',
+        },
+      });
+
+      this.logger.log(`✅ Notified user ${user.id} about KYC rejection`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify user of KYC rejection: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Extract user preferences from User entity
+   * Converts User properties to NotificationPreferences interface
+   */
+  private getUserPreferences(user: User): NotificationPreferences {
+    return {
+      isPushEnabled: user.isPushEnabled,
+      isEmailEnabled: user.isEmailEnabled,
+      isSmsEnabled: user.isSmsEnabled,
+    };
+  }
+
+  /**
+   * Get user locale for i18n translations
+   * Defaults to English if not specified
+   * TODO: Add locale field to User entity in the future
+   */
+  private getUserLocale(user: User): UserLocale {
+    // For now, default to English
+    // In the future, this can read from user.locale or user.preferences.locale
+    return UserLocale.ENGLISH;
+  }
+}

src/common/modules/notification/listeners/money-request-notification.listener.ts

@@ -0,0 +1,310 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { I18nService } from 'nestjs-i18n';
+import { NotificationFactory, NotificationPreferences } from '../services/notification-factory.service';
+import { UserService } from '~/user/services/user.service';
+import { NOTIFICATION_EVENTS } from '../constants/event-names.constant';
+import {
+  IMoneyRequestApprovedEvent,
+  IMoneyRequestCreatedEvent,
+  IMoneyRequestDeclinedEvent,
+} from '../interfaces/notification-events.interface';
+import { NotificationScope } from '../enums/notification-scope.enum';
+import { User } from '~/user/entities';
+import { MoneyRequest } from '~/money-request/entities/money-request.entity';
+import { UserLocale } from '~/core/enums/user-locale.enum';
+import { formatCurrencyAmount, getCurrency } from '~/common/utils/currency.util';
+
+/**
+ * MoneyRequestNotificationListener
+ * 
+ * Handles notifications for money request events.
+ * Notifies parents when children request money, and children when requests are approved/declined.
+ * 
+ * Responsibilities:
+ * - Listen for money request events (created, approved, declined)
+ * - Determine notification recipients (parent or child)
+ * - Construct appropriate messages
+ * - Fetch user preferences
+ * - Call NotificationFactory to send
+ */
+@Injectable()
+export class MoneyRequestNotificationListener {
+  private readonly logger = new Logger(MoneyRequestNotificationListener.name);
+
+  constructor(
+    private readonly notificationFactory: NotificationFactory,
+    private readonly userService: UserService,
+    private readonly i18n: I18nService,
+  ) {}
+
+  /**
+   * Handle money request created event
+   * Notifies parent when child requests money
+   */
+  @OnEvent(NOTIFICATION_EVENTS.MONEY_REQUEST_CREATED)
+  async handleMoneyRequestCreated(event: IMoneyRequestCreatedEvent): Promise<void> {
+    try {
+      const { moneyRequest } = event;
+
+      this.logger.log(
+        `Processing money request notification for request ${moneyRequest.id} - ` +
+        `Amount: $${moneyRequest.amount}, Reason: ${moneyRequest.reason}`
+      );
+
+      await this.notifyParentOfMoneyRequest(moneyRequest);
+
+      this.logger.log(
+        `Money request notification processed successfully for request ${moneyRequest.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process money request notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Handle money request approved event
+   * Notifies child when their money request is approved
+   */
+  @OnEvent(NOTIFICATION_EVENTS.MONEY_REQUEST_APPROVED)
+  async handleMoneyRequestApproved(event: IMoneyRequestApprovedEvent): Promise<void> {
+    try {
+      const { moneyRequest } = event;
+
+      this.logger.log(
+        `Processing money request approved notification for request ${moneyRequest.id}`
+      );
+
+      await this.notifyChildOfApproval(moneyRequest);
+
+      this.logger.log(
+        `Money request approved notification processed successfully for request ${moneyRequest.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process money request approved notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Handle money request declined event
+   * Notifies child when their money request is declined
+   */
+  @OnEvent(NOTIFICATION_EVENTS.MONEY_REQUEST_DECLINED)
+  async handleMoneyRequestDeclined(event: IMoneyRequestDeclinedEvent): Promise<void> {
+    try {
+      const { moneyRequest, rejectionReason } = event;
+
+      this.logger.log(
+        `Processing money request declined notification for request ${moneyRequest.id}`
+      );
+
+      await this.notifyChildOfRejection(moneyRequest, rejectionReason);
+
+      this.logger.log(
+        `Money request declined notification processed successfully for request ${moneyRequest.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process money request declined notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify parent when child requests money
+   */
+  private async notifyParentOfMoneyRequest(moneyRequest: any): Promise<void> {
+    try {
+      const guardian = moneyRequest?.guardian;
+      const parentUser = guardian?.customer?.user;
+      
+      if (!parentUser) {
+        this.logger.warn(`No parent user found for money request ${moneyRequest.id}, skipping notification`);
+        return;
+      }
+
+      const child = moneyRequest?.junior;
+      const childUser = child?.customer?.user;
+      const childName = childUser?.firstName || 'Your child';
+      const amount = typeof moneyRequest.amount === 'string' ? parseFloat(moneyRequest.amount) : moneyRequest.amount;
+      const reason = moneyRequest.reason || 'No reason provided';
+      const accountCurrency = child?.customer?.cards?.[0]?.account?.currency;
+      const currency = getCurrency(accountCurrency, null, 'SAR');
+      const formattedAmount = formatCurrencyAmount(amount, currency);
+
+      this.logger.debug(
+        `Notifying parent (user ${parentUser.id}): ${childName} requested ${formattedAmount} ${currency} - ${reason}`
+      );
+
+      await this.notificationFactory.send({
+        userId: parentUser.id,
+        title: 'Money Request',
+        message: `${childName} requested ${formattedAmount} ${currency}. Reason: ${reason}`,
+        scope: NotificationScope.MONEY_REQUEST_CREATED,
+        preferences: this.getUserPreferences(parentUser),
+        data: {
+          moneyRequestId: moneyRequest.id,
+          childId: childUser?.id,
+          childName: childName,
+          amount: formattedAmount,
+          currency: currency,
+          reason: reason,
+          timestamp: moneyRequest.createdAt.toISOString(),
+          type: 'MONEY_REQUEST',
+          action: 'VIEW_MONEY_REQUEST',
+        },
+      });
+
+      this.logger.log(`✅ Notified parent ${parentUser.id} about money request ${moneyRequest.id}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify parent of money request: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify child when their money request is approved
+   */
+  private async notifyChildOfApproval(moneyRequest: any): Promise<void> {
+    try {
+      const child = moneyRequest?.junior;
+      const childUser = child?.customer?.user;
+      
+      if (!childUser) {
+        this.logger.warn(`No child user found for money request ${moneyRequest.id}, skipping notification`);
+        return;
+      }
+
+      const amount = typeof moneyRequest.amount === 'string' ? parseFloat(moneyRequest.amount) : moneyRequest.amount;
+      const accountCurrency = child?.customer?.cards?.[0]?.account?.currency;
+      const currency = getCurrency(accountCurrency, null, 'SAR');
+      const formattedAmount = formatCurrencyAmount(amount, currency);
+
+      this.logger.debug(
+        `Notifying child (user ${childUser.id}): Money request of ${formattedAmount} ${currency} was approved`
+      );
+
+      await this.notificationFactory.send({
+        userId: childUser.id,
+        title: 'Money Request Approved',
+        message: `Your request for ${formattedAmount} ${currency} has been approved. The money has been added to your account.`,
+        scope: NotificationScope.MONEY_REQUEST_APPROVED,
+        preferences: this.getUserPreferences(childUser),
+        data: {
+          moneyRequestId: moneyRequest.id,
+          amount: formattedAmount,
+          currency: currency,
+          timestamp: moneyRequest.updatedAt.toISOString(),
+          type: 'MONEY_REQUEST_APPROVED',
+          action: 'VIEW_MONEY_REQUEST',
+        },
+      });
+
+      this.logger.log(`✅ Notified child ${childUser.id} about approved money request ${moneyRequest.id}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify child of approval: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify child when their money request is declined
+   */
+  private async notifyChildOfRejection(moneyRequest: any, rejectionReason?: string): Promise<void> {
+    try {
+      const child = moneyRequest?.junior;
+      const childUser = child?.customer?.user;
+      
+      if (!childUser) {
+        this.logger.warn(`No child user found for money request ${moneyRequest.id}, skipping notification`);
+        return;
+      }
+
+      const amount = typeof moneyRequest.amount === 'string' ? parseFloat(moneyRequest.amount) : moneyRequest.amount;
+      const accountCurrency = child?.customer?.cards?.[0]?.account?.currency;
+      const currency = getCurrency(accountCurrency, null, 'SAR');
+      const formattedAmount = formatCurrencyAmount(amount, currency);
+      const reason = rejectionReason || 'No reason provided';
+      const locale = this.getUserLocale(childUser);
+
+      this.logger.debug(
+        `Notifying child (user ${childUser.id}): Money request of ${formattedAmount} ${currency} was declined`
+      );
+
+      let title: string;
+      let message: string;
+
+      try {
+        title = this.i18n.t('app.NOTIFICATION.MONEY_REQUEST_DECLINED_TITLE', { lang: locale });
+        message = this.i18n.t('app.NOTIFICATION.MONEY_REQUEST_DECLINED_MESSAGE', {
+          lang: locale,
+          args: {
+            amount: formattedAmount,
+            currency: currency,
+            reason: reason,
+          },
+        });
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[MoneyRequestNotificationListener] i18n error for child ${childUser.id}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        title = 'Money Request Declined';
+        message = `Your request for ${formattedAmount} ${currency} has been declined. Reason: ${reason}`;
+      }
+
+      await this.notificationFactory.send({
+        userId: childUser.id,
+        title,
+        message,
+        scope: NotificationScope.MONEY_REQUEST_DECLINED,
+        preferences: this.getUserPreferences(childUser),
+        data: {
+          moneyRequestId: moneyRequest.id,
+          amount: formattedAmount,
+          currency: currency,
+          rejectionReason: reason,
+          timestamp: moneyRequest.updatedAt.toISOString(),
+          type: 'MONEY_REQUEST_DECLINED',
+          action: 'VIEW_MONEY_REQUEST',
+        },
+      });
+
+      this.logger.log(`✅ Notified child ${childUser.id} about declined money request ${moneyRequest.id}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify child of rejection: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Extract user preferences from User entity
+   * Converts User properties to NotificationPreferences interface
+   */
+  private getUserPreferences(user: User): NotificationPreferences {
+    return {
+      isPushEnabled: user.isPushEnabled,
+      isEmailEnabled: user.isEmailEnabled,
+      isSmsEnabled: user.isSmsEnabled,
+    };
+  }
+
+  private getUserLocale(user: User): UserLocale {
+    // For now, default to English
+    // In the future, this can read from user.locale or user.preferences.locale
+    return UserLocale.ENGLISH;
+  }
+}

src/common/modules/notification/listeners/notification-created.listener.ts

@@ -6,6 +6,7 @@ import { EventType, NotificationChannel, NotificationScope } from '~/common/modu
 import { FirebaseService, TwilioService } from '~/common/modules/notification/services';
 import { IEventInterface } from '~/common/redis/interface';
 import { DeviceService } from '~/user/services';
+import { UserService } from '~/user/services/user.service';
 
 @Injectable()
 export class NotificationCreatedListener {
@@ -16,6 +17,7 @@ export class NotificationCreatedListener {
     private readonly deviceService: DeviceService,
     private readonly mailerService: MailerService,
     private readonly firebaseService: FirebaseService,
+    private readonly userService: UserService,
   ) {}
 
   /**
@@ -31,7 +33,7 @@ export class NotificationCreatedListener {
         return this.sendSMS(event.recipient!, event.message);
 
       case NotificationChannel.PUSH:
-        return this.sendPushNotification(event.userId, event.title, event.message);
+        return this.sendPushNotification(event.userId, event.title, event.message, event.data);
 
       case NotificationChannel.EMAIL:
         return this.sendEmail({
@@ -54,15 +56,54 @@ export class NotificationCreatedListener {
     }
   }
 
-  private async sendPushNotification(userId: string, title: string, body: string) {
-    this.logger.log(`Sending push notification to user ${userId}`);
-    const tokens = await this.deviceService.getTokens(userId);
+  private async sendPushNotification(
+    userId: string,
+    title: string,
+    body: string,
+    data?: Record<string, any>,
+  ) {
+    try {
+      // Check if user has push notifications enabled
+      const user = await this.userService.findUser({ id: userId });
+      if (!user) {
+        this.logger.warn(`User ${userId} not found, skipping push notification`);
+        return;
+      }
 
-    if (!tokens.length) {
-      this.logger.log(`No device tokens found for user ${userId}, but notification was created in the DB.`);
-      return;
+      if (!user.isPushEnabled) {
+        this.logger.log(
+          `Push notifications disabled for user ${userId}, notification saved to DB but push not sent`
+        );
+        return;
+      }
+
+      this.logger.log(`Sending push notification to user ${userId}`);
+      const tokens = await this.deviceService.getTokens(userId);
+
+      if (!tokens.length) {
+        this.logger.log(`No device tokens found for user ${userId}, but notification was created in the DB.`);
+        return;
+      }
+
+      // Convert data to string values (Firebase requires string values in data payload)
+      const stringData: Record<string, string> | undefined = data
+        ? Object.entries(data).reduce(
+            (acc, [key, value]) => {
+              acc[key] = String(value);
+              return acc;
+            },
+            {} as Record<string, string>,
+          )
+        : undefined;
+
+      return this.firebaseService.sendNotification(tokens, title, body, stringData);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to send push notification to user ${userId}: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+      // Don't throw - notification is already saved to DB
     }
-    return this.firebaseService.sendNotification(tokens, title, body);
   }
 
   private async sendSMS(to: string, body: string) {

src/common/modules/notification/listeners/profile-notification.listener.ts

@@ -0,0 +1,149 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { I18nService } from 'nestjs-i18n';
+import { NotificationFactory, NotificationPreferences } from '../services/notification-factory.service';
+import { UserService } from '~/user/services/user.service';
+import { NOTIFICATION_EVENTS } from '../constants/event-names.constant';
+import { IProfileUpdatedEvent } from '../interfaces/notification-events.interface';
+import { NotificationScope } from '../enums/notification-scope.enum';
+import { User } from '~/user/entities';
+import { UserLocale } from '~/core/enums/user-locale.enum';
+
+@Injectable()
+export class ProfileNotificationListener {
+  private readonly logger = new Logger(ProfileNotificationListener.name);
+
+  constructor(
+    private readonly notificationFactory: NotificationFactory,
+    private readonly userService: UserService,
+    private readonly i18n: I18nService,
+  ) {}
+
+  @OnEvent(NOTIFICATION_EVENTS.PROFILE_UPDATED)
+  async handleProfileUpdated(event: IProfileUpdatedEvent): Promise<void> {
+    try {
+      const { user, updatedFields } = event;
+
+      this.logger.log(
+        `Processing profile updated notification for user ${user.id} - Updated fields: ${updatedFields.join(', ')}`
+      );
+
+      await this.notifyUserOfProfileUpdate(user, updatedFields);
+
+      this.logger.log(
+        `Profile updated notification processed successfully for user ${user.id}`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process profile updated notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  private async notifyUserOfProfileUpdate(user: any, updatedFields: string[]): Promise<void> {
+    try {
+      if (!user) {
+        this.logger.warn(`No user found, skipping profile update notification`);
+        return;
+      }
+
+      const locale = this.getUserLocale(user);
+      const isEmailUpdate = updatedFields.includes('email');
+      const isPasswordUpdate = updatedFields.includes('password');
+      const isProfilePictureUpdate = updatedFields.includes('profilePictureId');
+      const isNameUpdate = updatedFields.includes('firstName') || updatedFields.includes('lastName');
+
+      let title: string;
+      let message: string;
+
+      try {
+        if (isEmailUpdate) {
+          title = this.i18n.t('app.NOTIFICATION.PROFILE_EMAIL_UPDATED_TITLE', { lang: locale });
+          message = this.i18n.t('app.NOTIFICATION.PROFILE_EMAIL_UPDATED_MESSAGE', {
+            lang: locale,
+            args: {
+              email: user.email || 'your email',
+            },
+          });
+        } else if (isPasswordUpdate) {
+          title = this.i18n.t('app.NOTIFICATION.PROFILE_PASSWORD_UPDATED_TITLE', { lang: locale });
+          message = this.i18n.t('app.NOTIFICATION.PROFILE_PASSWORD_UPDATED_MESSAGE', {
+            lang: locale,
+          });
+        } else if (isProfilePictureUpdate) {
+          title = this.i18n.t('app.NOTIFICATION.PROFILE_PICTURE_UPDATED_TITLE', { lang: locale });
+          message = this.i18n.t('app.NOTIFICATION.PROFILE_PICTURE_UPDATED_MESSAGE', {
+            lang: locale,
+          });
+        } else if (isNameUpdate) {
+          title = this.i18n.t('app.NOTIFICATION.PROFILE_NAME_UPDATED_TITLE', { lang: locale });
+          message = this.i18n.t('app.NOTIFICATION.PROFILE_NAME_UPDATED_MESSAGE', {
+            lang: locale,
+          });
+        } else {
+          title = this.i18n.t('app.NOTIFICATION.PROFILE_UPDATED_TITLE', { lang: locale });
+          message = this.i18n.t('app.NOTIFICATION.PROFILE_UPDATED_MESSAGE', {
+            lang: locale,
+            args: {
+              fields: updatedFields.join(', '),
+            },
+          });
+        }
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[ProfileNotificationListener] i18n error for user ${user.id}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        
+        if (isEmailUpdate) {
+          title = 'Email Updated';
+          message = `Your email has been updated to ${user.email || 'a new email'}. Please verify your new email address.`;
+        } else if (isPasswordUpdate) {
+          title = 'Password Updated';
+          message = 'Your password has been successfully updated. If you did not make this change, please contact support immediately.';
+        } else {
+          title = 'Profile Updated';
+          message = `Your profile has been updated. Changes: ${updatedFields.join(', ')}`;
+        }
+      }
+
+      this.logger.debug(
+        `Notifying user (user ${user.id}): Profile updated - ${updatedFields.join(', ')}`
+      );
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message,
+        scope: NotificationScope.PROFILE_UPDATED,
+        preferences: this.getUserPreferences(user),
+        data: {
+          updatedFields: updatedFields,
+          timestamp: new Date().toISOString(),
+          type: 'PROFILE_UPDATE',
+          action: 'VIEW_PROFILE',
+        },
+      });
+
+      this.logger.log(`✅ Notified user ${user.id} about profile update`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify user of profile update: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  private getUserPreferences(user: User): NotificationPreferences {
+    return {
+      isPushEnabled: user.isPushEnabled,
+      isEmailEnabled: user.isEmailEnabled,
+      isSmsEnabled: user.isSmsEnabled,
+    };
+  }
+
+  private getUserLocale(user: User): UserLocale {
+    return UserLocale.ENGLISH;
+  }
+}

src/common/modules/notification/listeners/system-alert-notification.listener.ts

@@ -0,0 +1,282 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { I18nService } from 'nestjs-i18n';
+import { NotificationFactory, NotificationPreferences } from '../services/notification-factory.service';
+import { UserService } from '~/user/services/user.service';
+import { NOTIFICATION_EVENTS } from '../constants/event-names.constant';
+import {
+  IMaintenanceAlertEvent,
+  ISuspiciousLoginEvent,
+  ITransactionFailedEvent,
+} from '../interfaces/notification-events.interface';
+import { NotificationScope } from '../enums/notification-scope.enum';
+import { User } from '~/user/entities';
+import { UserLocale } from '~/core/enums/user-locale.enum';
+
+@Injectable()
+export class SystemAlertNotificationListener {
+  private readonly logger = new Logger(SystemAlertNotificationListener.name);
+
+  constructor(
+    private readonly notificationFactory: NotificationFactory,
+    private readonly userService: UserService,
+    private readonly i18n: I18nService,
+  ) {}
+
+  @OnEvent(NOTIFICATION_EVENTS.MAINTENANCE_ALERT)
+  async handleMaintenanceAlert(event: IMaintenanceAlertEvent): Promise<void> {
+    try {
+      const { userId, message, startTime, endTime } = event;
+
+      this.logger.log(
+        `Processing maintenance alert notification - User: ${userId || 'ALL'}, Message: ${message}`
+      );
+
+      if (userId) {
+        await this.notifyUserOfMaintenance(userId, message, startTime, endTime);
+      } else {
+        this.logger.warn('Broadcast maintenance alerts to all users not yet implemented');
+      }
+
+      this.logger.log(`Maintenance alert notification processed successfully`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process maintenance alert notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  @OnEvent(NOTIFICATION_EVENTS.TRANSACTION_FAILED)
+  async handleTransactionFailed(event: ITransactionFailedEvent): Promise<void> {
+    try {
+      const { userId, transactionId, reason, amount } = event;
+
+      this.logger.log(
+        `Processing transaction failed notification for user ${userId} - Transaction: ${transactionId}, Reason: ${reason}`
+      );
+
+      await this.notifyUserOfTransactionFailure(userId, transactionId, reason, amount);
+
+      this.logger.log(`Transaction failed notification processed successfully for user ${userId}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process transaction failed notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  @OnEvent(NOTIFICATION_EVENTS.SUSPICIOUS_LOGIN)
+  async handleSuspiciousLogin(event: ISuspiciousLoginEvent): Promise<void> {
+    try {
+      const { userId, ipAddress, location, device } = event;
+
+      this.logger.log(
+        `Processing suspicious login notification for user ${userId} - IP: ${ipAddress}, Location: ${location}`
+      );
+
+      await this.notifyUserOfSuspiciousLogin(userId, ipAddress, location, device);
+
+      this.logger.log(`Suspicious login notification processed successfully for user ${userId}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to process suspicious login notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  private async notifyUserOfMaintenance(
+    userId: string,
+    message: string,
+    startTime?: Date,
+    endTime?: Date,
+  ): Promise<void> {
+    try {
+      const user = await this.userService.findUserOrThrow({ id: userId });
+      const locale = this.getUserLocale(user);
+
+      let title: string;
+      let notificationMessage: string;
+
+      try {
+        title = this.i18n.t('app.NOTIFICATION.MAINTENANCE_ALERT_TITLE', { lang: locale });
+        notificationMessage = this.i18n.t('app.NOTIFICATION.MAINTENANCE_ALERT_MESSAGE', {
+          lang: locale,
+          args: {
+            message: message,
+            startTime: startTime ? startTime.toLocaleString() : '',
+            endTime: endTime ? endTime.toLocaleString() : '',
+          },
+        });
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[SystemAlertNotificationListener] i18n error for user ${userId}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        title = 'Scheduled Maintenance';
+        notificationMessage = message || 'The system will be under maintenance. Please check back later.';
+        if (startTime && endTime) {
+          notificationMessage += ` Scheduled from ${startTime.toLocaleString()} to ${endTime.toLocaleString()}.`;
+        }
+      }
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message: notificationMessage,
+        scope: NotificationScope.MAINTENANCE_ALERT,
+        preferences: this.getUserPreferences(user),
+        data: {
+          message: message,
+          startTime: startTime?.toISOString(),
+          endTime: endTime?.toISOString(),
+          timestamp: new Date().toISOString(),
+          type: 'MAINTENANCE',
+          action: 'VIEW_STATUS',
+        },
+      });
+
+      this.logger.log(`✅ Notified user ${userId} about maintenance`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify user of maintenance: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  private async notifyUserOfTransactionFailure(
+    userId: string,
+    transactionId: string | undefined,
+    reason: string,
+    amount?: number,
+  ): Promise<void> {
+    try {
+      const user = await this.userService.findUserOrThrow({ id: userId });
+      const locale = this.getUserLocale(user);
+
+      let title: string;
+      let message: string;
+
+      try {
+        title = this.i18n.t('app.NOTIFICATION.TRANSACTION_FAILED_TITLE', { lang: locale });
+        message = this.i18n.t('app.NOTIFICATION.TRANSACTION_FAILED_MESSAGE', {
+          lang: locale,
+          args: {
+            reason: reason,
+            amount: amount ? amount.toString() : '',
+          },
+        });
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[SystemAlertNotificationListener] i18n error for user ${userId}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        title = 'Transaction Failed';
+        message = `Your transaction could not be completed. Reason: ${reason}.`;
+        if (amount) {
+          message += ` Amount: ${amount}`;
+        }
+        message += ' Please try again or contact support if the issue persists.';
+      }
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message,
+        scope: NotificationScope.TRANSACTION_FAILED,
+        preferences: this.getUserPreferences(user),
+        data: {
+          transactionId: transactionId,
+          reason: reason,
+          amount: amount,
+          timestamp: new Date().toISOString(),
+          type: 'TRANSACTION_FAILED',
+          action: 'RETRY_TRANSACTION',
+        },
+      });
+
+      this.logger.log(`✅ Notified user ${userId} about failed transaction`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify user of transaction failure: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  private async notifyUserOfSuspiciousLogin(
+    userId: string,
+    ipAddress?: string,
+    location?: string,
+    device?: string,
+  ): Promise<void> {
+    try {
+      const user = await this.userService.findUserOrThrow({ id: userId });
+      const locale = this.getUserLocale(user);
+
+      let title: string;
+      let message: string;
+
+      try {
+        title = this.i18n.t('app.NOTIFICATION.SUSPICIOUS_LOGIN_TITLE', { lang: locale });
+        message = this.i18n.t('app.NOTIFICATION.SUSPICIOUS_LOGIN_MESSAGE', {
+          lang: locale,
+          args: {
+            location: location || 'unknown location',
+            device: device || 'unknown device',
+            ipAddress: ipAddress || 'unknown IP',
+          },
+        });
+      } catch (i18nError: any) {
+        this.logger.error(
+          `[SystemAlertNotificationListener] i18n error for user ${userId}: ${i18nError?.message || 'Unknown i18n error'}. Falling back to English.`,
+          i18nError?.stack
+        );
+        title = 'Suspicious Login Detected';
+        message = `We detected a login attempt from ${location || 'an unknown location'} (${ipAddress || 'unknown IP'})`;
+        if (device) {
+          message += ` using ${device}`;
+        }
+        message += '. If this was not you, please change your password immediately and contact support.';
+      }
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message,
+        scope: NotificationScope.SUSPICIOUS_LOGIN,
+        preferences: this.getUserPreferences(user),
+        data: {
+          ipAddress: ipAddress,
+          location: location,
+          device: device,
+          timestamp: new Date().toISOString(),
+          type: 'SUSPICIOUS_LOGIN',
+          action: 'CHANGE_PASSWORD',
+        },
+      });
+
+      this.logger.log(`✅ Notified user ${userId} about suspicious login`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify user of suspicious login: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  private getUserPreferences(user: User): NotificationPreferences {
+    return {
+      isPushEnabled: user.isPushEnabled,
+      isEmailEnabled: user.isEmailEnabled,
+      isSmsEnabled: user.isSmsEnabled,
+    };
+  }
+
+  private getUserLocale(user: User): UserLocale {
+    return UserLocale.ENGLISH;
+  }
+}

src/common/modules/notification/listeners/transaction-notification.listener.ts

@@ -0,0 +1,558 @@
+import { forwardRef, Inject, Injectable, Logger } from '@nestjs/common';
+import { OnEvent } from '@nestjs/event-emitter';
+import { I18nService } from 'nestjs-i18n';
+import { NotificationFactory, NotificationPreferences } from '../services/notification-factory.service';
+import { UserService } from '~/user/services/user.service';
+import { AccountService } from '~/card/services/account.service';
+import { CardService } from '~/card/services/card.service';
+import { NOTIFICATION_EVENTS } from '../constants/event-names.constant';
+import { ITransactionCreatedEvent } from '../interfaces/notification-events.interface';
+import { NotificationScope } from '../enums/notification-scope.enum';
+import { Transaction } from '~/card/entities/transaction.entity';
+import { Card } from '~/card/entities/card.entity';
+import { User } from '~/user/entities';
+import { UserLocale } from '~/core/enums/user-locale.enum';
+import { formatCurrencyAmount, getCurrency, numericToCurrencyCode } from '~/common/utils/currency.util';
+
+/**
+ * TransactionNotificationListener
+ * 
+ * Handles notifications for transaction events.
+ * Determines who should be notified and what message to send.
+ * 
+ * Responsibilities:
+ * - Listen for transaction events
+ * - Determine notification recipients (child, parent, or both)
+ * - Construct appropriate messages
+ * - Fetch user preferences
+ * - Call NotificationFactory to send
+ */
+@Injectable()
+export class TransactionNotificationListener {
+  private readonly logger = new Logger(TransactionNotificationListener.name);
+
+  constructor(
+    private readonly notificationFactory: NotificationFactory,
+    private readonly userService: UserService,
+    private readonly i18n: I18nService,
+    @Inject(forwardRef(() => AccountService))
+    private readonly accountService: AccountService,
+    @Inject(forwardRef(() => CardService))
+    private readonly cardService: CardService,
+  ) {}
+
+  /**
+   * Main event handler for transaction created events
+   * Routes to appropriate notification logic based on transaction type
+   */
+  @OnEvent(NOTIFICATION_EVENTS.TRANSACTION_CREATED)
+  async handleTransactionCreated(event: ITransactionCreatedEvent): Promise<void> {
+    try {
+      console.log(`[TransactionNotificationListener] Event received: ${NOTIFICATION_EVENTS.TRANSACTION_CREATED}`);
+      const { transaction, card, isTopUp, isChildSpending } = event;
+
+      this.logger.log(
+        `Processing transaction notification for transaction ${transaction.id} - ` +
+        `isTopUp: ${isTopUp}, isChildSpending: ${isChildSpending}`
+      );
+      
+      console.log(`[TransactionNotificationListener] Transaction: ${transaction.id}, Card: ${card?.id}, isTopUp: ${isTopUp}, isChildSpending: ${isChildSpending}`);
+
+      await this.notifyTransactionOwner(transaction, card, isTopUp, isChildSpending);
+
+      if (isChildSpending) {
+        if (isTopUp) {
+          await this.notifyParentOfTopUp(transaction, card);
+        } else {
+          await this.notifyParentOfChildSpending(transaction, card);
+        }
+      }
+
+      this.logger.log(
+        `Transaction notification processed successfully for transaction ${transaction.id}`
+      );
+    } catch (error: any) {
+      console.error(`[TransactionNotificationListener] ERROR:`, error);
+      this.logger.error(
+        `Failed to process transaction notification: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify the transaction owner (the cardholder)
+   * Could be a child or a parent depending on whose card was used
+   */
+  private async notifyTransactionOwner(
+    transaction: Transaction,
+    card: Card,
+    isTopUp: boolean,
+    isChildSpending: boolean
+  ): Promise<void> {
+    try {
+      const user = card?.customer?.user;
+      if (!user) {
+        this.logger.warn(`No user found for transaction ${transaction.id}, skipping notification`);
+        return;
+      }
+
+      const scope = isTopUp
+        ? NotificationScope.CHILD_TOP_UP
+        : NotificationScope.CHILD_SPENDING;
+
+      const locale = this.getUserLocale(user);
+      const amount = transaction.transactionAmount;
+      const merchant = transaction.merchantName || 'merchant';
+      
+      // For child top-up notifications, show card.limit (newAmount) instead of account balance
+      // card.limit represents the total spending limit on the card after the transfer
+      let balance = 0;
+      let accountCurrency: string | undefined;
+      
+      if (isTopUp) {
+        // For top-up: show card limit (newAmount from transfer response)
+        try {
+          // Reload card to get updated limit
+          const cardWithUpdatedLimit = await this.cardService.getCardById(card.id);
+          balance = cardWithUpdatedLimit.limit || card.limit || 0;
+          accountCurrency = cardWithUpdatedLimit.account?.currency || card.account?.currency;
+          this.logger.debug(
+            `[Child Top-Up Notification] Using card limit (newAmount) - limit: ${balance} ${accountCurrency}`
+          );
+        } catch (error: any) {
+          this.logger.warn(
+            `[Child Top-Up Notification] Could not reload card: ${error?.message}. Using card limit from event.`
+          );
+          balance = card.limit || 0;
+          accountCurrency = card.account?.currency;
+        }
+      } else {
+        // For spending: show account balance
+        try {
+          // Reload card to get account reference
+          const cardWithUpdatedBalance = await this.cardService.getCardById(card.id);
+          if (cardWithUpdatedBalance?.account?.accountReference) {
+            // Fetch by reference number to get fresh balance from database
+            const account = await this.accountService.getAccountByReferenceNumber(
+              cardWithUpdatedBalance.account.accountReference
+            );
+            balance = account.balance;
+            accountCurrency = account.currency;
+            this.logger.debug(
+              `[Child Spending Notification] Fetched account by reference - balance: ${balance} ${accountCurrency}`
+            );
+          } else {
+            // Fallback: use card's account balance
+            balance = cardWithUpdatedBalance.account?.balance || card.account?.balance || 0;
+            accountCurrency = cardWithUpdatedBalance.account?.currency || card.account?.currency;
+            this.logger.debug(
+              `[Child Spending Notification] Using card account balance - balance: ${balance} ${accountCurrency}`
+            );
+          }
+        } catch (error: any) {
+          this.logger.warn(
+            `[Child Spending Notification] Could not fetch account by reference: ${error?.message}. Using card account balance.`
+          );
+          // Fallback: use card's account balance
+          balance = card.account?.balance || 0;
+          accountCurrency = card.account?.currency;
+        }
+      }
+      const currency = getCurrency(
+        accountCurrency,
+        transaction.transactionCurrency,
+        'SAR'
+      );
+      
+      this.logger.debug(
+        `[Child Notification] Account currency: ${accountCurrency}, Transaction currency: ${transaction.transactionCurrency}, Final currency: ${currency}, Balance: ${balance}, Amount: ${amount}`
+      );
+      
+      const formattedAmount = formatCurrencyAmount(amount, currency);
+      const formattedBalance = formatCurrencyAmount(balance, currency);
+
+      let title: string;
+      let message: string;
+      
+      try {
+        title = isTopUp
+          ? this.i18n.t('app.NOTIFICATION.CHILD_TOP_UP_TITLE', { lang: locale })
+          : this.i18n.t('app.NOTIFICATION.CHILD_SPENDING_TITLE', { lang: locale });
+
+              message = isTopUp
+                ? this.i18n.t('app.NOTIFICATION.CHILD_TOP_UP_MESSAGE', {
+                    lang: locale,
+                    args: {
+                      amount: formattedAmount,
+                      currency: currency,
+                      balance: formattedBalance,
+                    },
+                  })
+                : this.i18n.t('app.NOTIFICATION.CHILD_SPENDING_MESSAGE', {
+                    lang: locale,
+                    args: {
+                      amount: formattedAmount,
+                      currency: currency,
+                      merchant: merchant,
+                      balance: formattedBalance,
+                    },
+                  });
+      } catch (i18nError: any) {
+        console.error(`[TransactionNotificationListener] i18n error:`, i18nError);
+        this.logger.error(`i18n translation failed: ${i18nError?.message}`, i18nError?.stack);
+        // Fallback to English without i18n
+              title = isTopUp ? 'Card Topped Up' : 'Purchase Successful';
+              message = isTopUp
+                ? `You received ${formattedAmount} ${currency}. Total balance: ${formattedBalance} ${currency}`
+                : `You spent ${formattedAmount} ${currency} at ${merchant}. Balance: ${formattedBalance} ${currency}`;
+      }
+
+      this.logger.debug(
+        `Notifying transaction owner (user ${user.id}) - Amount: ${amount} ${currency}, Merchant: ${merchant}`
+      );
+
+      await this.notificationFactory.send({
+        userId: user.id,
+        title,
+        message,
+        scope,
+        preferences: this.getUserPreferences(user),
+              data: {
+                transactionId: transaction.id,
+                amount: formattedAmount,
+                currency: currency, // ISO currency code (SAR, USD, etc.)
+                merchant: merchant,
+                merchantCategory: transaction.merchantCategoryCode || 'OTHER',
+                balance: formattedBalance,
+                timestamp: transaction.transactionDate.toISOString(),
+                type: isTopUp ? 'TOP_UP' : 'SPENDING',
+                action: 'OPEN_TRANSACTION',
+              },
+      });
+
+      this.logger.log(`✅ Notified user ${user.id} for transaction ${transaction.id}`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify transaction owner: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify parent when their child makes a purchase
+   * This is a spending alert for parents to monitor their children's expenses
+   */
+  private async notifyParentOfChildSpending(transaction: Transaction, card: Card): Promise<void> {
+    try {
+      this.logger.debug(`Checking for parent to notify about child spending`);
+
+      const customer = card?.customer;
+      const parentUser = customer?.junior?.guardian?.customer?.user;
+      
+      if (!parentUser) {
+        this.logger.debug(`No parent found for transaction ${transaction.id}, skipping parent notification`);
+        return;
+      }
+
+      const childUser = customer.user;
+      const locale = this.getUserLocale(parentUser);
+      const defaultChildName = this.i18n.t('app.NOTIFICATION.YOUR_CHILD', { lang: locale });
+      const childName = childUser?.firstName || defaultChildName;
+      const amount = transaction.transactionAmount;
+      const merchant = transaction.merchantName || 'a merchant';
+      
+      // Get parent's account balance (not child's balance) - reload to get fresh balance
+      let parentAccountBalance = 0;
+      let parentAccountCurrency: string | undefined;
+      try {
+        if (card.parentId) {
+          // Always reload parent account to get fresh balance after transaction
+          const parentAccount = await this.accountService.getAccountByCustomerId(card.parentId);
+          parentAccountBalance = parentAccount.balance;
+          parentAccountCurrency = parentAccount.currency;
+          this.logger.debug(`Fetched parent account balance: ${parentAccountBalance}, currency: ${parentAccountCurrency}`);
+        } else {
+          const parentCustomer = customer?.junior?.guardian?.customer;
+          if (parentCustomer?.cards?.[0]?.account) {
+            // Reload to get fresh balance
+            const parentAccount = await this.accountService.getAccountByCustomerId(parentCustomer.id);
+            parentAccountBalance = parentAccount.balance;
+            parentAccountCurrency = parentAccount.currency;
+            this.logger.debug(`Fetched parent account balance via customer: ${parentAccountBalance}, currency: ${parentAccountCurrency}`);
+          }
+        }
+      } catch (error: any) {
+        this.logger.warn(`Could not fetch parent account for parent notification: ${error?.message}, using child account balance as fallback`);
+        parentAccountBalance = card.account?.balance || 0;
+        parentAccountCurrency = card.account?.currency;
+      }
+      
+      const accountCurrency = parentAccountCurrency || card.account?.currency;
+      const currency = getCurrency(
+        accountCurrency,
+        transaction.transactionCurrency,
+        'SAR'
+      );
+      
+      this.logger.debug(
+        `[Parent Spending Notification] Parent account currency: ${parentAccountCurrency}, Account currency: ${accountCurrency}, Transaction currency: ${transaction.transactionCurrency}, Final currency: ${currency}, Parent balance: ${parentAccountBalance}, Amount: ${amount}`
+      );
+      
+      const formattedAmount = formatCurrencyAmount(amount, currency);
+      const formattedBalance = formatCurrencyAmount(parentAccountBalance, currency);
+
+      this.logger.debug(
+        `Notifying parent (user ${parentUser.id}): ${childName} spent ${formattedAmount} ${currency} at ${merchant}`
+      );
+
+      let title: string;
+      let message: string;
+      
+      try {
+        title = this.i18n.t('app.NOTIFICATION.PARENT_SPENDING_TITLE', { lang: locale });
+              message = this.i18n.t('app.NOTIFICATION.PARENT_SPENDING_MESSAGE', {
+                lang: locale,
+                args: {
+                  childName: childName,
+                  amount: formattedAmount,
+                  currency: currency,
+                  merchant: merchant,
+                  balance: formattedBalance,
+                },
+              });
+      } catch (i18nError: any) {
+        console.error(`[TransactionNotificationListener] i18n error in parent spending:`, i18nError);
+        this.logger.error(`i18n translation failed: ${i18nError?.message}`, i18nError?.stack);
+        title = 'Child Spending Alert';
+              message = `${childName} spent ${formattedAmount} ${currency} at ${merchant}. Balance: ${formattedBalance} ${currency}`;
+      }
+
+      await this.notificationFactory.send({
+        userId: parentUser.id,
+        title,
+        message,
+        scope: NotificationScope.PARENT_SPENDING_ALERT,
+        preferences: this.getUserPreferences(parentUser),
+        data: {
+          transactionId: transaction.id,
+          childId: childUser.id,
+          childName: childName,
+          amount: formattedAmount, // Use formatted amount instead of raw amount
+          currency: currency, // ISO currency code (SAR, USD, etc.)
+          merchant: merchant,
+          merchantCategory: transaction.merchantCategoryCode || 'OTHER',
+          balance: formattedBalance,
+          timestamp: transaction.transactionDate.toISOString(),
+          type: 'CHILD_SPENDING',
+          action: 'OPEN_TRANSACTION',
+        },
+      });
+
+      this.logger.log(`✅ Notified parent ${parentUser.id} about child spending`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify parent of child spending: ${        error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Notify parent when they top up their child's card
+   * This is a confirmation notification for the parent
+   */
+  private async notifyParentOfTopUp(transaction: Transaction, card: Card): Promise<void> {
+    try {
+      this.logger.debug(`Checking for parent to notify about top-up`);
+
+      const customer = card?.customer;
+      const parentUser = customer?.junior?.guardian?.customer?.user;
+      
+      if (!parentUser) {
+        this.logger.debug(`No parent found for transaction ${transaction.id}, skipping parent notification`);
+        return;
+      }
+
+      const childUser = customer.user;
+      const locale = this.getUserLocale(parentUser);
+      const defaultChildName = this.i18n.t('app.NOTIFICATION.YOUR_CHILD', { lang: locale });
+      const childName = childUser?.firstName || defaultChildName;
+      const amount = transaction.transactionAmount;
+      
+      // Fetch parent account by reference number to get fresh balance (bypasses entity cache)
+      // For parent notification, show available_balance = balance - reserved_balance
+      let parentAccountBalance = 0;
+      let parentAccountReservedBalance = 0;
+      let parentAccountCurrency: string | undefined;
+      let availableBalance = 0;
+      
+      if (card.parentId) {
+        try {
+          // Get parent's card to access their account reference
+          // card.parentId is the parent's CUSTOMER ID
+          const parentCard = await this.cardService.getCardByCustomerId(card.parentId);
+          if (parentCard?.account?.accountReference) {
+            // Fetch by reference number to get fresh balance from database
+            const parentAccount = await this.accountService.getAccountByReferenceNumber(
+              parentCard.account.accountReference
+            );
+            parentAccountBalance = parentAccount.balance;
+            parentAccountReservedBalance = parentAccount.reservedBalance;
+            availableBalance = parentAccountBalance - parentAccountReservedBalance;
+            parentAccountCurrency = parentAccount.currency;
+            this.logger.debug(
+              `[Parent Top-Up] Fetched parent account by reference - balance: ${parentAccountBalance}, reserved: ${parentAccountReservedBalance}, available: ${availableBalance} ${parentAccountCurrency}`
+            );
+          } else {
+            // Fallback: try by customer ID
+            const parentAccount = await this.accountService.getAccountByCustomerId(card.parentId);
+            parentAccountBalance = parentAccount.balance;
+            parentAccountReservedBalance = parentAccount.reservedBalance;
+            availableBalance = parentAccountBalance - parentAccountReservedBalance;
+            parentAccountCurrency = parentAccount.currency;
+            this.logger.debug(
+              `[Parent Top-Up] Fetched parent account by customer ID - balance: ${parentAccountBalance}, reserved: ${parentAccountReservedBalance}, available: ${availableBalance} ${parentAccountCurrency}`
+            );
+          }
+        } catch (error: any) {
+          this.logger.warn(
+            `[Parent Top-Up] Could not fetch parent account for customer ${card.parentId}: ${error?.message}. Using child account balance as fallback.`
+          );
+          availableBalance = card.account?.balance || 0;
+          parentAccountCurrency = card.account?.currency;
+        }
+      } else {
+        // If no parentId, try via customer relation
+        const parentCustomer = customer?.junior?.guardian?.customer;
+        if (parentCustomer?.id) {
+          try {
+            const parentCard = await this.cardService.getCardByCustomerId(parentCustomer.id);
+            if (parentCard?.account?.accountReference) {
+              const parentAccount = await this.accountService.getAccountByReferenceNumber(
+                parentCard.account.accountReference
+              );
+              parentAccountBalance = parentAccount.balance;
+              parentAccountReservedBalance = parentAccount.reservedBalance;
+              availableBalance = parentAccountBalance - parentAccountReservedBalance;
+              parentAccountCurrency = parentAccount.currency;
+              this.logger.debug(
+                `[Parent Top-Up] Fetched parent account via customer relation (by reference) - balance: ${parentAccountBalance}, reserved: ${parentAccountReservedBalance}, available: ${availableBalance} ${parentAccountCurrency}`
+              );
+            } else {
+              const parentAccount = await this.accountService.getAccountByCustomerId(parentCustomer.id);
+              parentAccountBalance = parentAccount.balance;
+              parentAccountReservedBalance = parentAccount.reservedBalance;
+              availableBalance = parentAccountBalance - parentAccountReservedBalance;
+              parentAccountCurrency = parentAccount.currency;
+              this.logger.debug(
+                `[Parent Top-Up] Fetched parent account via customer relation - balance: ${parentAccountBalance}, reserved: ${parentAccountReservedBalance}, available: ${availableBalance} ${parentAccountCurrency}`
+              );
+            }
+          } catch (error: any) {
+            this.logger.warn(
+              `[Parent Top-Up] Could not fetch parent account via customer: ${error?.message}. Using child account balance as fallback.`
+            );
+            availableBalance = card.account?.balance || 0;
+            parentAccountCurrency = card.account?.currency;
+          }
+        } else {
+          availableBalance = card.account?.balance || 0;
+          parentAccountCurrency = card.account?.currency;
+        }
+      }
+      
+      // Use available_balance for parent notification (balance - reserved_balance)
+      const balance = availableBalance;
+      const accountCurrency = parentAccountCurrency;
+      const currency = getCurrency(
+        accountCurrency,
+        transaction.transactionCurrency,
+      );
+      
+      this.logger.debug(
+        `[Parent Top-Up Notification] Parent account currency: ${parentAccountCurrency}, Account currency: ${accountCurrency}, Transaction currency: ${transaction.transactionCurrency}, Final currency: ${currency}, Parent balance: ${balance}, Amount: ${amount}`
+      );
+      
+      const formattedAmount = formatCurrencyAmount(amount, currency);
+      const formattedBalance = formatCurrencyAmount(balance, currency);
+
+      this.logger.debug(
+        `Notifying parent (user ${parentUser.id}): Transferred ${formattedAmount} ${currency} to ${childName}, parent balance: ${formattedBalance} ${currency}`
+      );
+
+      let title: string;
+      let message: string;
+      
+      try {
+        title = this.i18n.t('app.NOTIFICATION.PARENT_TOP_UP_TITLE', { lang: locale });
+        message = this.i18n.t('app.NOTIFICATION.PARENT_TOP_UP_MESSAGE', {
+          lang: locale,
+          args: {
+            amount: formattedAmount,
+            currency: currency,
+            childName: childName,
+            balance: formattedBalance,
+          },
+        });
+      } catch (i18nError: any) {
+        console.error(`[TransactionNotificationListener] i18n error in parent top-up:`, i18nError);
+        this.logger.error(`i18n translation failed: ${i18nError?.message}`, i18nError?.stack);
+        title = 'Top-Up Confirmation';
+              message = `You transferred ${formattedAmount} ${currency} to ${childName}. Balance: ${formattedBalance} ${currency}`;
+      }
+
+      await this.notificationFactory.send({
+        userId: parentUser.id,
+        title,
+        message,
+        scope: NotificationScope.PARENT_TOP_UP_CONFIRMATION,
+        preferences: this.getUserPreferences(parentUser),
+        data: {
+          transactionId: transaction.id,
+          childId: childUser.id,
+          childName: childName,
+          amount: formattedAmount,
+          currency: currency, // ISO currency code (SAR, USD, etc.)
+          balance: formattedBalance,
+          timestamp: transaction.transactionDate.toISOString(),
+          type: 'TOP_UP',
+          action: 'OPEN_TRANSACTION',
+        },
+      });
+
+      this.logger.log(`✅ Notified parent ${parentUser.id} about top-up`);
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to notify parent of top-up: ${        error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    }
+  }
+
+  /**
+   * Extract user preferences from User entity
+   * Converts User properties to NotificationPreferences interface
+   */
+  private getUserPreferences(user: User): NotificationPreferences {
+    return {
+      isPushEnabled: user.isPushEnabled,
+      isEmailEnabled: user.isEmailEnabled,
+      isSmsEnabled: user.isSmsEnabled,
+    };
+  }
+
+  /**
+   * Get user locale for i18n translations
+   * Defaults to English if not specified
+   * TODO: Add locale field to User entity in the future
+   */
+  private getUserLocale(user: User): UserLocale {
+    // For now, default to English
+    // In the future, this can read from user.locale or user.preferences.locale
+    return UserLocale.ENGLISH;
+  }
+}
+
+

src/common/modules/notification/notification.module.ts

@@ -3,19 +3,30 @@ import { forwardRef, Module } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { TwilioModule } from 'nestjs-twilio';
+import { CardModule } from '~/card/card.module';
 import { RedisModule } from '~/common/redis/redis.module';
 import { buildMailerOptions, buildTwilioOptions } from '~/core/module-options';
 import { UserModule } from '~/user/user.module';
 import { NotificationsController } from './controllers';
 import { Notification } from './entities';
-import { NotificationCreatedListener } from './listeners';
+import {
+  CardNotificationListener,
+  KycNotificationListener,
+  MoneyRequestNotificationListener,
+  NotificationCreatedListener,
+  ProfileNotificationListener,
+  SystemAlertNotificationListener,
+  TransactionNotificationListener,
+} from './listeners';
 import { NotificationsRepository } from './repositories';
-import { FirebaseService, NotificationsService, TwilioService } from './services';
+import { FirebaseService, NotificationFactory, NotificationsService, TwilioService } from './services';
+import { MessagingSystemFactory, RedisPubSubMessagingService } from './services/messaging';
 
 @Module({
   imports: [
     forwardRef(() => RedisModule.register()),
     forwardRef(() => UserModule),
+    forwardRef(() => CardModule),
     TypeOrmModule.forFeature([Notification]),
     TwilioModule.forRootAsync({
       useFactory: buildTwilioOptions,
@@ -28,12 +39,21 @@ import { FirebaseService, NotificationsService, TwilioService } from './services
   ],
   providers: [
     NotificationsService,
+    NotificationFactory,
     FirebaseService,
     NotificationsRepository,
     TwilioService,
     NotificationCreatedListener,
+    TransactionNotificationListener,
+    MoneyRequestNotificationListener,
+    KycNotificationListener,
+    CardNotificationListener,
+    ProfileNotificationListener,
+    SystemAlertNotificationListener,
+    RedisPubSubMessagingService,
+    MessagingSystemFactory,
   ],
-  exports: [NotificationsService, NotificationCreatedListener],
+  exports: [NotificationsService, NotificationFactory, NotificationCreatedListener],
   controllers: [NotificationsController],
 })
 export class NotificationModule {}

src/common/modules/notification/services/firebase.service.ts

@@ -1,29 +1,77 @@
 import { Injectable, Logger } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import * as admin from 'firebase-admin';
+
 @Injectable()
 export class FirebaseService {
   private readonly logger = new Logger(FirebaseService.name);
+
   constructor(private readonly configService: ConfigService) {
-    admin.initializeApp({
-      credential: admin.credential.cert({
-        projectId: this.configService.get('FIREBASE_PROJECT_ID'),
-        clientEmail: this.configService.get('FIREBASE_CLIENT_EMAIL'),
-        privateKey: this.configService.get('FIREBASE_PRIVATE_KEY').replace(/\\n/g, '\n'),
-      }),
-    });
+    try {
+      this.logger.log('🔥 Initializing Firebase Admin SDK...');
+
+      const projectId = this.configService.get('FIREBASE_PROJECT_ID');
+      const clientEmail = this.configService.get('FIREBASE_CLIENT_EMAIL');
+      const privateKey = this.configService.get('FIREBASE_PRIVATE_KEY');
+
+      // Log configuration (without exposing sensitive data)
+      this.logger.log(`📋 Project ID: ${projectId}`);
+      this.logger.log(`📋 Client Email: ${clientEmail}`);
+      this.logger.log(`📋 Private Key: ${privateKey ? 'SET ✅' : 'MISSING ❌'}`);
+
+      admin.initializeApp({
+        credential: admin.credential.cert({
+          projectId,
+          clientEmail,
+          privateKey: privateKey.replace(/\\n/g, '\n'),
+        }),
+      });
+
+      this.logger.log('✅ Firebase Admin SDK initialized successfully!');
+      this.logger.log(`📱 Connected to project: ${projectId}`);
+    } catch (error: any) {
+      this.logger.error('❌ Failed to initialize Firebase Admin SDK');
+      this.logger.error(`Error: ${error.message}`);
+      throw error;
+    }
   }
 
-  sendNotification(tokens: string | string[], title: string, body: string) {
-    this.logger.log(`Sending push notification to ${tokens}`);
-    const message = {
-      notification: {
-        title,
-        body,
-      },
-      tokens: Array.isArray(tokens) ? tokens : [tokens],
-    };
+  async sendNotification(tokens: string | string[], title: string, body: string, data?: Record<string, string>) {
+    this.logger.log(
+      `Sending push notification to ${Array.isArray(tokens) ? tokens.length : 1} device(s)`,
+    );
 
-    admin.messaging().sendEachForMulticast(message);
+    try {
+      const message = {
+        notification: {
+          title,
+          body,
+        },
+        data: data || {},
+        tokens: Array.isArray(tokens) ? tokens : [tokens],
+      };
+
+      const response = await admin.messaging().sendEachForMulticast(message);
+
+      this.logger.log(
+        `✅ Push sent! Success: ${response.successCount}, Failed: ${response.failureCount}`,
+      );
+
+      // Log failed tokens for debugging
+      if (response.failureCount > 0) {
+        response.responses.forEach((resp, idx) => {
+          if (!resp.success) {
+            this.logger.warn(
+              `Failed to send to token ${idx}: ${resp.error?.code} - ${resp.error?.message}`,
+            );
+          }
+        });
+      }
+
+      return response;
+    } catch (error: any) {
+      this.logger.error(`❌ Failed to send push notification: ${error.message}`);
+      throw error;
+    }
   }
 }

src/common/modules/notification/services/index.ts

@@ -1,3 +1,4 @@
 export * from './firebase.service';
+export * from './notification-factory.service';
 export * from './notifications.service';
 export * from './twilio.service';

src/common/modules/notification/services/messaging/index.ts

@@ -0,0 +1,3 @@
+export * from './redis-pubsub-messaging.service';
+export * from './messaging-system-factory.service';
+

src/common/modules/notification/services/messaging/messaging-system-factory.service.ts

@@ -0,0 +1,58 @@
+import { Injectable, Logger, Optional } from '@nestjs/common';
+import { NotificationScope, requiresGuaranteedDelivery } from '../../enums/notification-scope.enum';
+import { IMessagingSystem } from '../../interfaces/messaging-system.interface';
+import { RedisPubSubMessagingService } from './redis-pubsub-messaging.service';
+
+/**
+ * Messaging System Factory
+ * 
+ * Determines which messaging system to use based on notification requirements.
+ * 
+ * - Regular notifications → Redis PubSub (fast, 2-5ms)
+ * - Critical notifications → RabbitMQ/Kafka (guaranteed delivery, 20-50ms)
+ * 
+ * Usage:
+ * ```typescript
+ * const system = factory.getMessagingSystem(NotificationScope.CHILD_SPENDING);
+ * await system.publish('NOTIFICATION_CREATED', payload);
+ * ```
+ */
+@Injectable()
+export class MessagingSystemFactory {
+  private readonly logger = new Logger(MessagingSystemFactory.name);
+
+  constructor(
+    private readonly redisPubSubService: RedisPubSubMessagingService,
+  ) {}
+
+  /**
+   * Get the appropriate messaging system based on notification scope
+   * 
+   * @param scope - Notification scope
+   * @returns Messaging system to use
+   */
+  getMessagingSystem(scope: NotificationScope): IMessagingSystem {
+    const needsGuaranteedDelivery = requiresGuaranteedDelivery(scope);
+    
+    if (needsGuaranteedDelivery) {
+      this.logger.warn(
+        `[Factory] Critical notification ${scope} requires guaranteed delivery, ` +
+        `but RabbitMQ not configured. Falling back to Redis PubSub.`
+      );
+      return this.redisPubSubService;
+    } else {
+      this.logger.debug(`[Factory] Using Redis PubSub for notification: ${scope}`);
+      return this.redisPubSubService;
+    }
+  }
+
+  /**
+   * Get default messaging system (Redis PubSub)
+   * 
+   * @returns Default messaging system
+   */
+  getDefaultMessagingSystem(): IMessagingSystem {
+    return this.redisPubSubService;
+  }
+}
+

src/common/modules/notification/services/messaging/redis-pubsub-messaging.service.ts

@@ -0,0 +1,55 @@
+import { Inject, Injectable, Logger } from '@nestjs/common';
+import { RedisClientType } from '@keyv/redis';
+import { IMessagingSystem } from '../../interfaces/messaging-system.interface';
+
+/**
+ * Redis PubSub Messaging System Implementation
+ * 
+ * Fast, real-time messaging for regular notifications.
+ * Uses Redis PubSub for 2-5ms latency.
+ * 
+ * Note: Messages are not persisted (fire-and-forget).
+ * Suitable for notifications that are already saved in PostgreSQL.
+ */
+@Injectable()
+export class RedisPubSubMessagingService implements IMessagingSystem {
+  private readonly logger = new Logger(RedisPubSubMessagingService.name);
+
+  constructor(
+    @Inject('REDIS_PUBLISHER') private readonly publisher: RedisClientType,
+    @Inject('REDIS_SUBSCRIBER') private readonly subscriber: RedisClientType,
+  ) {}
+
+  getName(): string {
+    return 'Redis PubSub';
+  }
+
+  async publish(channel: string, payload: any): Promise<void> {
+    try {
+      const message = JSON.stringify(payload);
+      const subscriberCount = await this.publisher.publish(channel, message);
+      
+      this.logger.debug(
+        `[Redis PubSub] Published to ${channel}, ${subscriberCount} subscriber(s) received`
+      );
+    } catch (error: any) {
+      this.logger.error(`[Redis PubSub] Failed to publish to ${channel}: ${error?.message}`);
+      throw error;
+    }
+  }
+
+  async subscribe(channel: string, handler: (message: any) => Promise<void>): Promise<void> {
+    await this.subscriber.subscribe(channel, async (message) => {
+      try {
+        const data = JSON.parse(message);
+        await handler(data);
+      } catch (error: any) {
+        this.logger.error(
+          `[Redis PubSub] Failed to process message from ${channel}: ${error?.message}`
+        );
+      }
+    });
+    
+    this.logger.log(`[Redis PubSub] Subscribed to channel: ${channel}`);
+  }
+}

src/common/modules/notification/services/notification-factory.service.ts

@@ -0,0 +1,150 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { NotificationsService } from './notifications.service';
+import { NotificationChannel } from '../enums/notification-channel.enum';
+import { NotificationScope } from '../enums/notification-scope.enum';
+
+/**
+ * User notification preferences
+ * Determines which channels are enabled for a user
+ */
+export interface NotificationPreferences {
+  /** Whether push notifications are enabled */
+  isPushEnabled: boolean;
+  
+  /** Whether email notifications are enabled */
+  isEmailEnabled: boolean;
+  
+  /** Whether SMS notifications are enabled */
+  isSmsEnabled: boolean;
+}
+
+/**
+ * Payload for sending a notification
+ */
+export interface NotificationPayload {
+  /** ID of the user to notify */
+  userId: string;
+  
+  /** Notification title */
+  title: string;
+  
+  /** Notification message body */
+  message: string;
+  
+  /** Category/type of notification */
+  scope: NotificationScope;
+  
+  /** 
+   * User's notification preferences
+   * If not provided, defaults to push-only
+   */
+  preferences?: NotificationPreferences;
+  
+  /** Additional data to attach to the notification */
+  data?: Record<string, any>;
+}
+
+/**
+ * NotificationFactory
+ * 
+ * Central service for sending notifications.
+ * Independent service with no external dependencies (microservice-ready).
+ * 
+ * Handles:
+ * - Channel routing based on provided preferences
+ * - Parallel notification delivery
+ * - Error handling
+ * 
+ * Note: Caller is responsible for providing user preferences.
+ * This keeps the factory independent and testable.
+ * 
+ * Usage:
+ * await notificationFactory.send({
+ *   userId: 'user-123',
+ *   title: 'Transaction Alert',
+ *   message: 'You spent $50.00',
+ *   scope: NotificationScope.CHILD_SPENDING,
+ *   preferences: {
+ *     isPushEnabled: true,
+ *     isEmailEnabled: false,
+ *     isSmsEnabled: false,
+ *   },
+ * });
+ */
+@Injectable()
+export class NotificationFactory {
+  private readonly logger = new Logger(NotificationFactory.name);
+
+  constructor(
+    private readonly notificationsService: NotificationsService,
+  ) {}
+
+  /**
+   * Send a notification to a user
+   * Routes to enabled channels based on provided preferences
+   * 
+   * Note: Notifications are always saved to the database (via PUSH channel)
+   * for history/audit purposes, even if push notifications are disabled.
+   * The preferences only control whether push/email/SMS are actually sent.
+   * 
+   * @param payload - Notification payload including preferences
+   */
+  async send(payload: NotificationPayload): Promise<void> {
+    try {
+      this.logger.log(`Sending notification to user ${payload.userId} - ${payload.title}`);
+
+      const preferences = payload.preferences || {
+        isPushEnabled: true,
+        isEmailEnabled: false,
+        isSmsEnabled: false,
+      };
+
+      const promises: Promise<any>[] = [];
+
+      // Always create notification record in database (via PUSH channel for storage)
+      // This ensures notifications are saved for history, even if push is disabled
+      this.logger.debug(`Creating notification record for user ${payload.userId}`);
+      promises.push(
+        this.sendToChannel(payload, NotificationChannel.PUSH)
+      );
+
+      // Only send via additional channels if enabled
+      // Note: PUSH channel is already added above for database storage
+      // The actual push delivery will check preferences in FirebaseService
+
+      await Promise.all(promises);
+
+      const activeChannels = preferences.isPushEnabled ? 1 : 0;
+      this.logger.log(
+        `Notification sent to user ${payload.userId} via ${activeChannels} active channel(s) ` +
+        `(saved to database regardless of preferences)`
+      );
+    } catch (error: any) {
+      this.logger.error(
+        `Failed to send notification to user ${payload.userId}: ${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+      // Don't throw - prevents breaking the main business flow
+      // Notification failures should not break transactions, etc.
+    }
+  }
+
+  /**
+   * Send notification via a specific channel
+   * Creates the notification record and publishes it for delivery
+   */
+  private async sendToChannel(
+    payload: NotificationPayload,
+    channel: NotificationChannel
+  ): Promise<void> {
+    await this.notificationsService.createNotification({
+      userId: payload.userId,
+      title: payload.title,
+      message: payload.message,
+      scope: payload.scope,
+      channel,
+      data: payload.data,
+    });
+  }
+}
+

src/common/modules/notification/services/notifications.service.ts

@@ -6,8 +6,9 @@ import { OtpType } from '../../otp/enums';
 import { ISendOtp } from '../../otp/interfaces';
 import { SendEmailRequestDto } from '../dtos/request';
 import { Notification } from '../entities';
-import { EventType, NotificationChannel, NotificationScope } from '../enums';
+import { EventType, NotificationChannel, NotificationScope, NotificationStatus } from '../enums';
 import { NotificationsRepository } from '../repositories';
+import { MessagingSystemFactory } from './messaging/messaging-system-factory.service';
 
 @Injectable()
 export class NotificationsService {
@@ -17,6 +18,7 @@ export class NotificationsService {
 
     @Inject(forwardRef(() => RedisPubSubService))
     private readonly redisPubSubService: RedisPubSubService,
+    private readonly messagingSystemFactory: MessagingSystemFactory,
   ) {}
 
   async getNotifications(userId: string, pageOptionsDto: PageOptionsRequestDto) {
@@ -31,9 +33,32 @@ export class NotificationsService {
     return { notifications, count, unreadCount };
   }
 
-  createNotification(notification: Partial<Notification>) {
+  async createNotification(notification: Partial<Notification>) {
     this.logger.log(`Creating notification for user ${notification.userId}`);
-    return this.notificationRepository.createNotification(notification);
+    const savedNotification = await this.notificationRepository.createNotification({
+      ...notification,
+      status: notification.status || NotificationStatus.UNREAD,
+    });
+    
+    const scope = notification.scope || NotificationScope.USER_REGISTERED;
+    const messagingSystem = this.messagingSystemFactory.getMessagingSystem(scope);
+    
+    this.logger.log(
+      `Publishing ${EventType.NOTIFICATION_CREATED} event to ${messagingSystem.getName()}`
+    );
+    
+    messagingSystem.publish(EventType.NOTIFICATION_CREATED, {
+      ...savedNotification,
+      data: notification.data || savedNotification.data,
+    }).catch((error) => {
+      this.logger.error(
+        `Failed to publish notification ${savedNotification.id} to ${messagingSystem.getName()}: ` +
+        `${error?.message || 'Unknown error'}`,
+        error?.stack
+      );
+    });
+    
+    return savedNotification;
   }
 
   markAsRead(userId: string) {
@@ -42,34 +67,25 @@ export class NotificationsService {
   }
 
   async sendEmailAsync(data: SendEmailRequestDto) {
-    this.logger.log(`emitting ${EventType.NOTIFICATION_CREATED} event`);
-    const notification = await this.createNotification({
+    this.logger.log(`Creating email notification for ${data.to}`);
+    await this.createNotification({
       recipient: data.to,
       title: data.subject,
       message: '',
       scope: NotificationScope.USER_INVITED,
       channel: NotificationChannel.EMAIL,
-    });
-    // return this.redisPubSubService.emit(EventType.NOTIFICATION_CREATED, notification, data.data);
-    this.redisPubSubService.publishEvent(EventType.NOTIFICATION_CREATED, {
-      ...notification,
-      data,
+      data: data.data,
     });
   }
 
   async sendOtpNotification(sendOtpRequest: ISendOtp, otp: string) {
     this.logger.log(`Sending OTP to ${sendOtpRequest.recipient}`);
-    const notification = await this.createNotification({
+    return this.createNotification({
       recipient: sendOtpRequest.recipient,
       title: OTP_TITLE,
       message: OTP_BODY.replace('{otp}', otp),
       scope: NotificationScope.OTP,
       channel: sendOtpRequest.otpType === OtpType.EMAIL ? NotificationChannel.EMAIL : NotificationChannel.SMS,
-    });
-
-    this.logger.log(`emitting ${EventType.NOTIFICATION_CREATED} event`);
-    return this.redisPubSubService.publishEvent(EventType.NOTIFICATION_CREATED, {
-      ...notification,
       data: { otp },
     });
   }

src/common/redis/redis.module.ts

@@ -14,7 +14,15 @@ export class RedisModule {
         {
           provide: 'REDIS_PUBLISHER',
           useFactory: async (configService: ConfigService) => {
-            const publisher = createClient({ url: configService.get<string>('REDIS_URL') });
+            // Skip Redis connection during migration generation
+            if (process.env.MIGRATIONS_RUN === 'false') {
+              return null;
+            }
+            const redisUrl = configService.get<string>('REDIS_URL');
+            if (!redisUrl) {
+              return null;
+            }
+            const publisher = createClient({ url: redisUrl });
             await publisher.connect();
             return publisher;
           },
@@ -24,7 +32,15 @@ export class RedisModule {
         {
           provide: 'REDIS_SUBSCRIBER',
           useFactory: async (configService: ConfigService) => {
-            const subscriber = createClient({ url: configService.get<string>('REDIS_URL') });
+            // Skip Redis connection during migration generation
+            if (process.env.MIGRATIONS_RUN === 'false') {
+              return null;
+            }
+            const redisUrl = configService.get<string>('REDIS_URL');
+            if (!redisUrl) {
+              return null;
+            }
+            const subscriber = createClient({ url: redisUrl });
             await subscriber.connect();
             return subscriber;
           },
@@ -32,7 +48,11 @@ export class RedisModule {
         },
         RedisPubSubService,
       ],
-      exports: [RedisPubSubService],
+      exports: [
+        RedisPubSubService,
+        'REDIS_PUBLISHER',
+        'REDIS_SUBSCRIBER',
+      ],
       imports: [NotificationModule],
     };
   }

src/common/redis/services/redis-pubsub.service.ts

@@ -15,6 +15,10 @@ export class RedisPubSubService implements OnModuleInit {
   ) {}
 
   onModuleInit() {
+    // Skip subscription during migration generation
+    if (process.env.MIGRATIONS_RUN === 'false' || !this.subscriber) {
+      return;
+    }
     this.subscriber.subscribe(EventType.NOTIFICATION_CREATED, async (message) => {
       const data = JSON.parse(message);
       this.logger.log('Received message on NOTIFICATION_CREATED channel:', data);

src/common/utils/currency.util.ts

@@ -0,0 +1,111 @@
+/**
+ * Currency utility functions
+ * Handles currency code mapping and formatting
+ */
+
+/**
+ * ISO 4217 numeric currency codes to ISO currency code mapping
+ * Common codes used in the system:
+ * - 682: SAR (Saudi Riyal)
+ * - 900: USD (US Dollar) - if used
+ * - 784: AED (UAE Dirham)
+ * - 414: KWD (Kuwaiti Dinar)
+ * - 512: OMR (Omani Rial)
+ * - 048: BHD (Bahraini Dinar)
+ * - 400: JOD (Jordanian Dinar)
+ */
+export const NUMERIC_TO_CURRENCY_CODE: Record<string, string> = {
+  '682': 'SAR',
+  '900': 'USD',
+  '784': 'AED',
+  '414': 'KWD',
+  '512': 'OMR',
+  '048': 'BHD',
+  '400': 'JOD',
+  '586': 'PKR',
+};
+
+/**
+ * Currency decimal places mapping
+ * ISO 4217 standard decimal places for each currency
+ */
+export const CURRENCY_DECIMAL_PLACES: Record<string, number> = {
+  'SAR': 2, // Saudi Riyal
+  'USD': 2, // US Dollar
+  'AED': 2, // UAE Dirham
+  'KWD': 3, // Kuwaiti Dinar
+  'OMR': 3, // Omani Rial
+  'BHD': 3, // Bahraini Dinar
+  'JOD': 3, // Jordanian Dinar
+  'PKR': 2, // Pakistani Rupee
+  'JPY': 0, // Japanese Yen (if used)
+  'KRW': 0, // South Korean Won (if used)
+};
+
+/**
+ * Convert numeric currency code to ISO currency code
+ * @param numericCode - Numeric currency code (e.g., '682')
+ * @returns ISO currency code (e.g., 'SAR') or the original code if not found
+ */
+export function numericToCurrencyCode(numericCode: string | null | undefined): string {
+  if (!numericCode) {
+    return 'SAR'; // Default fallback
+  }
+
+  // If already an ISO code (3 letters), return as is
+  if (/^[A-Z]{3}$/.test(numericCode)) {
+    return numericCode;
+  }
+
+  // Map numeric code to ISO code
+  return NUMERIC_TO_CURRENCY_CODE[numericCode] || numericCode;
+}
+
+/**
+ * Format amount based on currency decimal places
+ * @param amount - Amount to format (number or string)
+ * @param currency - ISO currency code (e.g., 'SAR', 'KWD')
+ * @returns Formatted amount string
+ */
+export function formatCurrencyAmount(amount: number | string, currency: string): string {
+  const numAmount = typeof amount === 'string' ? parseFloat(amount) : amount;
+  
+  if (isNaN(numAmount)) {
+    return '0';
+  }
+
+  const decimalPlaces = CURRENCY_DECIMAL_PLACES[currency] ?? 2;
+  return numAmount.toFixed(decimalPlaces);
+}
+
+/**
+ * Get currency from account or transaction, with fallback
+ * @param accountCurrency - Currency from account entity (may be numeric like '682')
+ * @param transactionCurrency - Currency from transaction entity (may be numeric)
+ * @param fallback - Fallback currency (default: 'SAR')
+ * @returns ISO currency code
+ */
+export function getCurrency(
+  accountCurrency?: string | null,
+  transactionCurrency?: string | null,
+  fallback: string = 'SAR'
+): string {
+  // Convert account currency first (it may be numeric like '682')
+  if (accountCurrency) {
+    const converted = numericToCurrencyCode(accountCurrency);
+    if (converted && converted !== accountCurrency) {
+      return converted; // Successfully converted from numeric to ISO
+    }
+    // If already ISO format, return as is
+    if (/^[A-Z]{3}$/.test(accountCurrency)) {
+      return accountCurrency;
+    }
+  }
+
+  // Convert transaction currency (may be numeric)
+  if (transactionCurrency) {
+    return numericToCurrencyCode(transactionCurrency);
+  }
+
+  return fallback;
+}

src/customer/services/customer.service.ts

@@ -1,10 +1,16 @@
 import { BadRequestException, ConflictException, forwardRef, Inject, Injectable, Logger } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import moment from 'moment';
 import { Transactional } from 'typeorm-transactional';
 import { CountryIso } from '~/common/enums';
 import { NumericToCountryIso } from '~/common/mappers';
 import { KycWebhookRequest } from '~/common/modules/neoleap/dtos/requests';
 import { NeoLeapService } from '~/common/modules/neoleap/services';
+import { NOTIFICATION_EVENTS } from '~/common/modules/notification/constants/event-names.constant';
+import {
+  IKycApprovedEvent,
+  IKycRejectedEvent,
+} from '~/common/modules/notification/interfaces/notification-events.interface';
 import { GuardianService } from '~/guardian/services';
 import { CreateJuniorRequestDto } from '~/junior/dtos/request';
 import { User } from '~/user/entities';
@@ -23,6 +29,7 @@ export class CustomerService {
     private readonly guardianService: GuardianService,
     @Inject(forwardRef(() => NeoLeapService)) private readonly neoleapService: NeoLeapService,
     private readonly metadataService: MetadataService,
+    private readonly eventEmitter: EventEmitter2,
   ) {}
 
   async updateCustomer(userId: string, data: Partial<Customer>): Promise<Customer> {
@@ -151,6 +158,7 @@ export class CustomerService {
     }
 
     const customer = await this.findCustomerById(transaction.customerId);
+    const previousStatus = customer.kycStatus;
 
     // Update transaction record
     await this.kycTransactionRepo.updateByStateId(body.stateId, {
@@ -165,8 +173,32 @@ export class CustomerService {
     await this.customerRepository.updateCustomer(customer.id, {
       kycStatus,
       neoleapExternalCustomerId: body.entity.externalId,
+      rejectionReason: kycStatus === KycStatus.REJECTED ? 'KYC verification failed' : null,
     });
 
+    // Reload customer with updated data
+    const updatedCustomer = await this.findCustomerById(customer.id);
+
+    // Emit notification event
+    if (kycStatus === KycStatus.APPROVED) {
+      const event: IKycApprovedEvent = {
+        customer: updatedCustomer,
+        previousStatus,
+        timestamp: new Date(),
+      };
+      this.eventEmitter.emit(NOTIFICATION_EVENTS.KYC_APPROVED, event);
+      this.logger.log(`Emitted KYC_APPROVED event for customer ${customer.id}`);
+    } else {
+      const event: IKycRejectedEvent = {
+        customer: updatedCustomer,
+        previousStatus,
+        rejectionReason: updatedCustomer.rejectionReason || 'KYC verification failed',
+        timestamp: new Date(),
+      };
+      this.eventEmitter.emit(NOTIFICATION_EVENTS.KYC_REJECTED, event);
+      this.logger.log(`Emitted KYC_REJECTED event for customer ${customer.id}`);
+    }
+
     this.logger.log(`KYC updated successfully for customer ${customer.id}, status: ${body.status}, externalId: ${body.entity.externalId}`);
   }
 

src/db/migrations/1767172707881-AddDataColumnToNotifications.ts

@@ -0,0 +1,16 @@
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+export class AddDataColumnToNotifications1767172707881 implements MigrationInterface {
+    name = 'AddDataColumnToNotifications1767172707881'
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "notifications" ADD "data" jsonb`);
+        await queryRunner.query(`ALTER TABLE "kyc_transactions" ALTER COLUMN "national_id" DROP DEFAULT`);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "kyc_transactions" ALTER COLUMN "national_id" SET DEFAULT ''`);
+        await queryRunner.query(`ALTER TABLE "notifications" DROP COLUMN "data"`);
+    }
+
+}

src/db/migrations/1768395622276-AddTimezoneFields.ts

@@ -0,0 +1,18 @@
+import { MigrationInterface, QueryRunner } from "typeorm";
+
+export class AddTimezoneFields1768395622276 implements MigrationInterface {
+    name = 'AddTimezoneFields1768395622276'
+
+    public async up(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "users" ADD "timezone" character varying(50)`);
+        await queryRunner.query(`ALTER TABLE "devices" ADD "timezone" character varying(50)`);
+        await queryRunner.query(`ALTER TABLE "users" ALTER COLUMN "is_push_enabled" SET DEFAULT true`);
+    }
+
+    public async down(queryRunner: QueryRunner): Promise<void> {
+        await queryRunner.query(`ALTER TABLE "users" ALTER COLUMN "is_push_enabled" SET DEFAULT false`);
+        await queryRunner.query(`ALTER TABLE "devices" DROP COLUMN "timezone"`);
+        await queryRunner.query(`ALTER TABLE "users" DROP COLUMN "timezone"`);
+    }
+
+}

src/db/migrations/index.ts

@@ -6,7 +6,9 @@ export * from './1757433339849-add-reservation-amount-to-account-entity';
 export * from './1757915357218-add-deleted-at-column-to-junior';
 export * from './1760869651296-AddMerchantInfoToTransactions';
 export * from './1761032305682-AddUniqueConstraintToUserEmail';
+export * from './1767172707881-AddDataColumnToNotifications';
 export * from './1765804942393-AddKycFieldsAndTransactions';
 export * from './1765877128065-AddNationalIdToKycTransactions';
 export * from './1765891028260-RemoveOldCustomerColumns';
-export * from './1765975126402-RemoveAddressColumns';
+export * from './1765975126402-RemoveAddressColumns';
+export * from './1768395622276-AddTimezoneFields';

src/i18n/ar/app.json

@@ -110,5 +110,46 @@
     "INSUFFICIENT_BALANCE": "البطاقة لا تحتوي على رصيد كافٍ لإكمال هذا التحويل.",
     "DOES_NOT_BELONG_TO_GUARDIAN": "البطاقة لا تنتمي إلى ولي الأمر.",
     "NOT_FOUND": "لم يتم العثور على البطاقة."
+  },
+  "NOTIFICATION": {
+    "CHILD_TOP_UP_TITLE": "تم شحن البطاقة",
+    "CHILD_TOP_UP_MESSAGE": "لقد استلمت {amount} {currency}. الرصيد الإجمالي: {balance} {currency}",
+    "CHILD_SPENDING_TITLE": "تمت العملية بنجاح",
+    "CHILD_SPENDING_MESSAGE": "لقد أنفقت {amount} {currency} في {merchant}. الرصيد: {balance} {currency}",
+    "PARENT_TOP_UP_TITLE": "تأكيد الشحن",
+    "PARENT_TOP_UP_MESSAGE": "لقد قمت بتحويل {amount} {currency} إلى {childName}. الرصيد: {balance} {currency}",
+    "PARENT_SPENDING_TITLE": "تنبيه إنفاق الطفل",
+    "PARENT_SPENDING_MESSAGE": "أنفق {childName} {amount} {currency} في {merchant}. الرصيد: {balance} {currency}",
+    "YOUR_CHILD": "طفلك",
+    "MONEY_REQUEST_CREATED_TITLE": "طلب مال",
+    "MONEY_REQUEST_CREATED_MESSAGE": "طلب {childName} مبلغ {amount} {currency}. السبب: {reason}",
+    "MONEY_REQUEST_APPROVED_TITLE": "تمت الموافقة على طلب المال",
+    "MONEY_REQUEST_APPROVED_MESSAGE": "تمت الموافقة على طلبك بمبلغ {amount} {currency}. تمت إضافة المال إلى حسابك.",
+    "MONEY_REQUEST_DECLINED_TITLE": "تم رفض طلب المال",
+    "MONEY_REQUEST_DECLINED_MESSAGE": "تم رفض طلبك بمبلغ {amount} {currency}. السبب: {reason}",
+    "KYC_APPROVED_TITLE": "تمت الموافقة على التحقق من الهوية",
+    "KYC_APPROVED_MESSAGE": "تمت الموافقة على التحقق من هويتك. يمكنك الآن استخدام جميع ميزات التطبيق.",
+    "KYC_REJECTED_TITLE": "تم رفض التحقق من الهوية",
+    "KYC_REJECTED_MESSAGE": "تم رفض التحقق من هويتك. السبب: {reason}. يرجى مراجعة معلوماتك والمحاولة مرة أخرى.",
+    "CARD_CREATED_TITLE": "تم إنشاء البطاقة",
+    "CARD_CREATED_MESSAGE": "تم إنشاء بطاقتك التي تنتهي بـ {lastFourDigits} بنجاح. يمكنك البدء في استخدامها بمجرد تفعيلها.",
+    "CARD_BLOCKED_TITLE": "تم حظر البطاقة",
+    "CARD_BLOCKED_MESSAGE": "تم حظر بطاقتك التي تنتهي بـ {lastFourDigits}. السبب: {reason}. يرجى الاتصال بالدعم للحصول على المساعدة.",
+    "PROFILE_UPDATED_TITLE": "تم تحديث الملف الشخصي",
+    "PROFILE_UPDATED_MESSAGE": "تم تحديث ملفك الشخصي. التغييرات: {fields}",
+    "PROFILE_EMAIL_UPDATED_TITLE": "تم تحديث البريد الإلكتروني",
+    "PROFILE_EMAIL_UPDATED_MESSAGE": "تم تحديث بريدك الإلكتروني إلى {email}. يرجى التحقق من عنوان بريدك الإلكتروني الجديد.",
+    "PROFILE_PASSWORD_UPDATED_TITLE": "تم تحديث كلمة المرور",
+    "PROFILE_PASSWORD_UPDATED_MESSAGE": "تم تحديث كلمة المرور بنجاح. إذا لم تقم بهذا التغيير، يرجى الاتصال بالدعم فوراً.",
+    "PROFILE_PICTURE_UPDATED_TITLE": "تم تحديث صورة الملف الشخصي",
+    "PROFILE_PICTURE_UPDATED_MESSAGE": "تم تحديث صورة ملفك الشخصي بنجاح.",
+    "PROFILE_NAME_UPDATED_TITLE": "تم تحديث الاسم",
+    "PROFILE_NAME_UPDATED_MESSAGE": "تم تحديث اسمك بنجاح.",
+    "MAINTENANCE_ALERT_TITLE": "صيانة مجدولة",
+    "MAINTENANCE_ALERT_MESSAGE": "{message}",
+    "TRANSACTION_FAILED_TITLE": "فشلت المعاملة",
+    "TRANSACTION_FAILED_MESSAGE": "لم يتم إكمال معاملتك. السبب: {reason}. يرجى المحاولة مرة أخرى أو الاتصال بالدعم إذا استمرت المشكلة.",
+    "SUSPICIOUS_LOGIN_TITLE": "تم اكتشاف تسجيل دخول مشبوه",
+    "SUSPICIOUS_LOGIN_MESSAGE": "اكتشفنا محاولة تسجيل دخول من {location} ({ipAddress}) باستخدام {device}. إذا لم تكن أنت، يرجى تغيير كلمة المرور فوراً والاتصال بالدعم."
   }
 }

src/i18n/en/app.json

@@ -109,5 +109,46 @@
     "INSUFFICIENT_BALANCE": "The card does not have sufficient balance to complete this transfer.",
     "DOES_NOT_BELONG_TO_GUARDIAN": "The card does not belong to the guardian.",
     "NOT_FOUND": "The card was not found."
+  },
+  "NOTIFICATION": {
+    "CHILD_TOP_UP_TITLE": "Card Topped Up",
+    "CHILD_TOP_UP_MESSAGE": "You received {amount} {currency}. Total balance: {balance} {currency}",
+    "CHILD_SPENDING_TITLE": "Purchase Successful",
+    "CHILD_SPENDING_MESSAGE": "You spent {amount} {currency} at {merchant}. Balance: {balance} {currency}",
+    "PARENT_TOP_UP_TITLE": "Top-Up Confirmation",
+    "PARENT_TOP_UP_MESSAGE": "You transferred {amount} {currency} to {childName}. Balance: {balance} {currency}",
+    "PARENT_SPENDING_TITLE": "Child Spending Alert",
+    "PARENT_SPENDING_MESSAGE": "{childName} spent {amount} {currency} at {merchant}. Balance: {balance} {currency}",
+    "YOUR_CHILD": "Your child",
+    "MONEY_REQUEST_CREATED_TITLE": "Money Request",
+    "MONEY_REQUEST_CREATED_MESSAGE": "{childName} requested {amount} {currency}. Reason: {reason}",
+    "MONEY_REQUEST_APPROVED_TITLE": "Money Request Approved",
+    "MONEY_REQUEST_APPROVED_MESSAGE": "Your request for {amount} {currency} has been approved. The money has been added to your account.",
+    "MONEY_REQUEST_DECLINED_TITLE": "Money Request Declined",
+    "MONEY_REQUEST_DECLINED_MESSAGE": "Your request for {amount} {currency} has been declined. Reason: {reason}",
+    "KYC_APPROVED_TITLE": "KYC Verification Approved",
+    "KYC_APPROVED_MESSAGE": "Your KYC verification has been approved. You can now use all features of the app.",
+    "KYC_REJECTED_TITLE": "KYC Verification Rejected",
+    "KYC_REJECTED_MESSAGE": "Your KYC verification has been rejected. Reason: {reason}. Please review your information and try again.",
+    "CARD_CREATED_TITLE": "Card Created",
+    "CARD_CREATED_MESSAGE": "Your card ending in {lastFourDigits} has been created successfully. You can start using it once it's activated.",
+    "CARD_BLOCKED_TITLE": "Card Blocked",
+    "CARD_BLOCKED_MESSAGE": "Your card ending in {lastFourDigits} has been blocked. Reason: {reason}. Please contact support for assistance.",
+    "PROFILE_UPDATED_TITLE": "Profile Updated",
+    "PROFILE_UPDATED_MESSAGE": "Your profile has been updated. Changes: {fields}",
+    "PROFILE_EMAIL_UPDATED_TITLE": "Email Updated",
+    "PROFILE_EMAIL_UPDATED_MESSAGE": "Your email has been updated to {email}. Please verify your new email address.",
+    "PROFILE_PASSWORD_UPDATED_TITLE": "Password Updated",
+    "PROFILE_PASSWORD_UPDATED_MESSAGE": "Your password has been successfully updated. If you did not make this change, please contact support immediately.",
+    "PROFILE_PICTURE_UPDATED_TITLE": "Profile Picture Updated",
+    "PROFILE_PICTURE_UPDATED_MESSAGE": "Your profile picture has been updated successfully.",
+    "PROFILE_NAME_UPDATED_TITLE": "Name Updated",
+    "PROFILE_NAME_UPDATED_MESSAGE": "Your name has been updated successfully.",
+    "MAINTENANCE_ALERT_TITLE": "Scheduled Maintenance",
+    "MAINTENANCE_ALERT_MESSAGE": "{message}",
+    "TRANSACTION_FAILED_TITLE": "Transaction Failed",
+    "TRANSACTION_FAILED_MESSAGE": "Your transaction could not be completed. Reason: {reason}. Please try again or contact support if the issue persists.",
+    "SUSPICIOUS_LOGIN_TITLE": "Suspicious Login Detected",
+    "SUSPICIOUS_LOGIN_MESSAGE": "We detected a login attempt from {location} ({ipAddress}) using {device}. If this was not you, please change your password immediately and contact support."
   }
 }

src/money-request/repositories/money-requests.repository.ts

@@ -56,7 +56,35 @@ export class MoneyRequestsRepository {
     }
     return this.moneyRequestRepository.findOne({
       where: whereCondition,
-      relations: ['junior', 'junior.customer', 'junior.customer.user', 'junior.customer.user.profilePicture'],
+      relations: [
+        'junior',
+        'junior.customer',
+        'junior.customer.user',
+        'junior.customer.user.profilePicture',
+      ],
+    });
+  }
+
+  findByIdWithAllRelations(id: string, userId?: string, role?: Roles): Promise<MoneyRequest | null> {
+    const whereCondition: any = { id };
+    if (role === Roles.JUNIOR) {
+      whereCondition.juniorId = userId;
+    } else {
+      whereCondition.guardianId = userId;
+    }
+    return this.moneyRequestRepository.findOne({
+      where: whereCondition,
+      relations: [
+        'junior',
+        'junior.customer',
+        'junior.customer.user',
+        'junior.customer.user.profilePicture',
+        'junior.customer.cards',
+        'junior.customer.cards.account',
+        'guardian',
+        'guardian.customer',
+        'guardian.customer.user',
+      ],
     });
   }
 

src/money-request/services/money-requests.service.ts

@@ -1,6 +1,13 @@
 import { BadRequestException, Injectable, Logger } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import { Transactional } from 'typeorm-transactional';
 import { Roles } from '~/auth/enums';
+import { NOTIFICATION_EVENTS } from '~/common/modules/notification/constants/event-names.constant';
+import {
+  IMoneyRequestApprovedEvent,
+  IMoneyRequestCreatedEvent,
+  IMoneyRequestDeclinedEvent,
+} from '~/common/modules/notification/interfaces/notification-events.interface';
 import { OciService } from '~/document/services';
 import { Junior } from '~/junior/entities/junior.entity';
 import { JuniorService } from '~/junior/services';
@@ -16,10 +23,19 @@ export class MoneyRequestsService {
     private readonly moneyRequestsRepository: MoneyRequestsRepository,
     private readonly juniorService: JuniorService,
     private readonly ociService: OciService,
+    private readonly eventEmitter: EventEmitter2,
   ) {}
   async createMoneyRequest(juniorId: string, body: CreateMoneyRequestDto) {
     const junior = await this.juniorService.findJuniorById(juniorId);
     const moneyRequest = await this.moneyRequestsRepository.createMoneyRequest(junior.id, junior.guardianId, body);
+    const moneyRequestWithRelations = await this.moneyRequestsRepository.findByIdWithAllRelations(moneyRequest.id);
+
+    const event: IMoneyRequestCreatedEvent = {
+      moneyRequest: moneyRequestWithRelations!,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.MONEY_REQUEST_CREATED, event);
+
     return this.findById(moneyRequest.id);
   }
 
@@ -63,6 +79,13 @@ export class MoneyRequestsService {
         moneyRequest.guardianId,
       ),
     ]);
+
+    const updatedMoneyRequest = await this.moneyRequestsRepository.findByIdWithAllRelations(id, guardianId, Roles.GUARDIAN);
+    const event: IMoneyRequestApprovedEvent = {
+      moneyRequest: updatedMoneyRequest!,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.MONEY_REQUEST_APPROVED, event);
   }
 
   async rejectMoneyRequest(
@@ -85,6 +108,14 @@ export class MoneyRequestsService {
     }
 
     await this.moneyRequestsRepository.rejectMoneyRequest(id, rejectionReasondto?.rejectionReason);
+
+    const updatedMoneyRequest = await this.moneyRequestsRepository.findByIdWithAllRelations(id, guardianId, Roles.GUARDIAN);
+    const event: IMoneyRequestDeclinedEvent = {
+      moneyRequest: updatedMoneyRequest!,
+      rejectionReason: rejectionReasondto?.rejectionReason,
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.MONEY_REQUEST_DECLINED, event);
   }
 
   private async prepareJuniorImages(juniors: Junior[]) {

src/user/controllers/user.controller.ts

@@ -1,15 +1,15 @@
-import { Body, Controller, Get, Headers, HttpCode, HttpStatus, Patch, UseGuards } from '@nestjs/common';
+import { Body, Controller, Get, HttpCode, HttpStatus, Patch, UseGuards } from '@nestjs/common';
 import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
 import { VerifyOtpRequestDto } from '~/auth/dtos/request';
 import { UserResponseDto } from '~/auth/dtos/response';
 import { IJwtPayload } from '~/auth/interfaces';
-import { DEVICE_ID_HEADER } from '~/common/constants';
 import { AuthenticatedUser } from '~/common/decorators';
 import { AccessTokenGuard } from '~/common/guards';
 import { ApiDataResponse } from '~/core/decorators';
 import { ResponseFactory } from '~/core/utils';
 import { UpdateNotificationsSettingsRequestDto, UpdateUserRequestDto } from '../dtos/request';
 import { UpdateEmailRequestDto } from '../dtos/request/update-email.request.dto';
+import { NotificationsSettingsResponseDto } from '../dtos/response/notifications-settings.response.dto';
 import { UserService } from '../services';
 
 @Controller('profile')
@@ -45,13 +45,22 @@ export class UserController {
     return this.userService.verifyEmail(user.sub, otp);
   }
 
+  @Get('notifications-settings')
+  @HttpCode(HttpStatus.OK)
+  @ApiDataResponse(NotificationsSettingsResponseDto)
+  async getNotificationSettings(@AuthenticatedUser() { sub }: IJwtPayload) {
+    const user = await this.userService.findUserOrThrow({ id: sub });
+    return ResponseFactory.data(new NotificationsSettingsResponseDto({
+      isPushEnabled: user.isPushEnabled ?? true,
+    }));
+  }
+
   @Patch('notifications-settings')
   @HttpCode(HttpStatus.NO_CONTENT)
   async updateNotificationSettings(
     @AuthenticatedUser() user: IJwtPayload,
     @Body() data: UpdateNotificationsSettingsRequestDto,
-    @Headers(DEVICE_ID_HEADER) deviceId: string,
   ) {
-    return this.userService.updateNotificationSettings(user.sub, data, deviceId);
+    return this.userService.updateNotificationSettings(user.sub, data, data.deviceId);
   }
 }

src/user/dtos/request/update-notifications-settings.request.dto.ts

@@ -2,23 +2,19 @@ import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 import { IsBoolean, IsOptional, IsString, ValidateIf } from 'class-validator';
 import { i18nValidationMessage as i18n } from 'nestjs-i18n';
 export class UpdateNotificationsSettingsRequestDto {
-  @ApiProperty()
-  @IsBoolean({ message: i18n('validation.IsBoolean', { path: 'general', property: 'customer.isEmailEnabled' }) })
-  @IsOptional()
-  isEmailEnabled!: boolean;
-
-  @ApiProperty()
+  @ApiPropertyOptional({ example: true, description: 'Enable/disable push notifications (default: true)', default: true })
   @IsBoolean({ message: i18n('validation.IsBoolean', { path: 'general', property: 'customer.isPushEnabled' }) })
   @IsOptional()
-  isPushEnabled!: boolean;
+  isPushEnabled?: boolean;
 
-  @ApiProperty()
-  @IsBoolean({ message: i18n('validation.IsBoolean', { path: 'general', property: 'customer.isSmsEnabled' }) })
-  @IsOptional()
-  isSmsEnabled!: boolean;
-
-  @ApiPropertyOptional()
+  @ApiPropertyOptional({ example: 'cXYzABC:APA91bH...', description: 'Firebase Cloud Messaging token (required if enabling push)' })
   @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.fcmToken' }) })
-  @ValidateIf((o) => o.isPushEnabled)
+  @ValidateIf((o) => o.isPushEnabled !== false)
+  @IsOptional()
   fcmToken?: string;
+
+  @ApiPropertyOptional({ example: 'device-123', description: 'Device identifier (optional, will be found automatically if not provided)' })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'auth.deviceId' }) })
+  deviceId?: string;
 }

src/user/dtos/request/update-user.request.dto.ts

@@ -34,4 +34,12 @@ export class UpdateUserRequestDto {
   @IsDateString({}, { message: i18n('validation.IsDateString', { path: 'general', property: 'customer.dateOfBirth' }) })
   @IsOptional()
   dateOfBirth!: Date;
+
+  @ApiPropertyOptional({
+    example: 'Asia/Riyadh',
+    description: 'User preferred timezone for reports/statements (e.g., "Asia/Riyadh", "America/New_York"). Leave empty or "Auto" to use device timezone.',
+  })
+  @IsOptional()
+  @IsString({ message: i18n('validation.IsString', { path: 'general', property: 'user.timezone' }) })
+  timezone?: string;
 }

src/user/dtos/response/notifications-settings.response.dto.ts

@@ -0,0 +1,10 @@
+import { ApiProperty } from '@nestjs/swagger';
+
+export class NotificationsSettingsResponseDto {
+  @ApiProperty({ example: true, description: 'Push notifications enabled/disabled' })
+  isPushEnabled!: boolean;
+
+  constructor(data: { isPushEnabled: boolean }) {
+    this.isPushEnabled = data.isPushEnabled;
+  }
+}

src/user/entities/device.entity.ts

@@ -18,6 +18,9 @@ export class Device {
   @Column('varchar', { name: 'fcm_token', nullable: true })
   fcmToken?: string | null;
 
+  @Column('varchar', { name: 'timezone', nullable: true, length: 50 })
+  timezone?: string | null; // e.g., "Asia/Riyadh", "America/New_York" - auto-detected from device
+
   @Column('timestamp with time zone', { name: 'last_access_on', default: () => 'CURRENT_TIMESTAMP' })
   lastAccessOn!: Date;
 

src/user/entities/user.entity.ts

@@ -61,12 +61,15 @@ export class User extends BaseEntity {
   @Column({ name: 'is_email_enabled', default: false })
   isEmailEnabled!: boolean;
 
-  @Column({ name: 'is_push_enabled', default: false })
+  @Column({ name: 'is_push_enabled', default: true })
   isPushEnabled!: boolean;
 
   @Column({ name: 'is_sms_enabled', default: false })
   isSmsEnabled!: boolean;
 
+  @Column('varchar', { name: 'timezone', nullable: true, length: 50 })
+  timezone?: string | null; // User's preferred timezone for reports/statements (e.g., "Asia/Riyadh")
+
   @Column('text', { nullable: true, array: true, name: 'roles' })
   roles!: Roles[];
 

src/user/repositories/device.repository.ts

@@ -11,6 +11,10 @@ export class DeviceRepository {
     return this.deviceRepository.findOne({ where: { deviceId, userId } });
   }
 
+  findByDeviceId(deviceId: string) {
+    return this.deviceRepository.findOne({ where: { deviceId } });
+  }
+
   createDevice(data: Partial<Device>) {
     return this.deviceRepository.save(data);
   }
@@ -22,4 +26,8 @@ export class DeviceRepository {
   getTokens(userId: string) {
     return this.deviceRepository.find({ where: { userId, fcmToken: Not(IsNull()) }, select: ['fcmToken'] });
   }
+
+  findUserDevices(userId: string) {
+    return this.deviceRepository.find({ where: { userId } });
+  }
 }

src/user/services/device.service.ts

@@ -10,6 +10,11 @@ export class DeviceService {
     return this.deviceRepository.findUserDeviceById(deviceId, userId);
   }
 
+  findByDeviceId(deviceId: string) {
+    this.logger.log(`Finding device with id ${deviceId} (any user)`);
+    return this.deviceRepository.findByDeviceId(deviceId);
+  }
+
   createDevice(data: Partial<Device>) {
     this.logger.log(`Creating device with data ${JSON.stringify(data)}`);
     return this.deviceRepository.createDevice(data);
@@ -26,4 +31,9 @@ export class DeviceService {
 
     return devices.map((device) => device.fcmToken!);
   }
+
+  findUserDevices(userId: string) {
+    this.logger.log(`Finding all devices for user ${userId}`);
+    return this.deviceRepository.findUserDevices(userId);
+  }
 }

src/user/services/user.service.ts

@@ -1,9 +1,12 @@
 import { BadRequestException, forwardRef, Inject, Injectable, Logger } from '@nestjs/common';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import { ConfigService } from '@nestjs/config';
 import * as bcrypt from 'bcrypt';
 import { FindOptionsWhere } from 'typeorm';
 import { Transactional } from 'typeorm-transactional';
 import { CountryIso } from '~/common/enums';
+import { NOTIFICATION_EVENTS } from '~/common/modules/notification/constants/event-names.constant';
+import { IProfileUpdatedEvent } from '~/common/modules/notification/interfaces/notification-events.interface';
 import { NotificationsService } from '~/common/modules/notification/services';
 import { OtpScope, OtpType } from '~/common/modules/otp/enums';
 import { OtpService } from '~/common/modules/otp/services';
@@ -28,6 +31,7 @@ export class UserService {
     private readonly documentService: DocumentService,
     private readonly otpService: OtpService,
     private readonly ociService: OciService,
+    private readonly eventEmitter: EventEmitter2,
   ) {}
 
   async findUser(where: FindOptionsWhere<User> | FindOptionsWhere<User>[], includeSignedUrl = false) {
@@ -131,22 +135,55 @@ export class UserService {
 
   async updateNotificationSettings(userId: string, data: UpdateNotificationsSettingsRequestDto, deviceId?: string) {
     this.logger.log(`Updating notification settings for user ${userId} with data ${JSON.stringify(data)}`);
-    if (data.isPushEnabled && !data.fcmToken) {
+    
+    const isPushEnabled = data.isPushEnabled ?? true;
+    
+    if (isPushEnabled && !data.fcmToken) {
       throw new BadRequestException('USER.FCM_TOKEN_REQUIRED');
     }
 
-    if (data.isPushEnabled && !deviceId) {
-      throw new BadRequestException('DEVICE_ID_REQUIRED');
-    }
+    if (isPushEnabled && data.fcmToken) {
+      let targetDeviceId = deviceId;
 
-    if (data.isPushEnabled && deviceId && data.fcmToken) {
-      await this.deviceService.updateDevice(deviceId, { fcmToken: data.fcmToken, userId });
+      if (!targetDeviceId) {
+        const userDevices = await this.deviceService.findUserDevices(userId);
+        if (userDevices.length > 0) {
+          targetDeviceId = userDevices[0].deviceId;
+          this.logger.log(`No deviceId provided, using first device: ${targetDeviceId}`);
+        } else {
+          targetDeviceId = `device-${userId}-${Date.now()}`;
+          this.logger.log(`No device found, creating new device: ${targetDeviceId}`);
+          await this.deviceService.createDevice({
+            deviceId: targetDeviceId,
+            userId,
+            fcmToken: data.fcmToken,
+            lastAccessOn: new Date(),
+          });
+        }
+      }
+
+      if (targetDeviceId) {
+        const existingDevice = await this.deviceService.findUserDeviceById(targetDeviceId, userId);
+        if (existingDevice) {
+          await this.deviceService.updateDevice(targetDeviceId, { fcmToken: data.fcmToken, userId });
+        } else {
+          const anyDevice = await this.deviceService.findByDeviceId(targetDeviceId);
+          if (anyDevice) {
+            await this.deviceService.updateDevice(targetDeviceId, { fcmToken: data.fcmToken, userId });
+          } else {
+            await this.deviceService.createDevice({
+              deviceId: targetDeviceId,
+              userId,
+              fcmToken: data.fcmToken,
+              lastAccessOn: new Date(),
+            });
+          }
+        }
+      }
     }
 
     await this.userRepository.update(userId, {
-      isPushEnabled: data.isPushEnabled,
-      isEmailEnabled: data.isEmailEnabled,
-      isSmsEnabled: data.isSmsEnabled,
+      isPushEnabled: isPushEnabled,
     });
   }
 
@@ -216,6 +253,19 @@ export class UserService {
       }
       await this.customerService.updateCustomer(userId, customerData);
     }
+
+    const updatedUser = await this.findUserOrThrow({ id: userId });
+    const updatedFields = Object.keys(data).filter(key => (data as any)[key] !== undefined);
+    
+    if (updatedFields.length > 0) {
+      const event: IProfileUpdatedEvent = {
+        user: updatedUser,
+        updatedFields,
+        timestamp: new Date(),
+      };
+      this.eventEmitter.emit(NOTIFICATION_EVENTS.PROFILE_UPDATED, event);
+      this.logger.log(`Emitted PROFILE_UPDATED event for user ${userId}, updated fields: ${updatedFields.join(', ')}`);
+    }
   }
 
   async updateUserEmail(userId: string, email: string) {
@@ -246,6 +296,15 @@ export class UserService {
       throw new BadRequestException('USER.NOT_FOUND');
     }
 
+    const updatedUser = await this.findUserOrThrow({ id: userId });
+    const event: IProfileUpdatedEvent = {
+      user: updatedUser,
+      updatedFields: ['email'],
+      timestamp: new Date(),
+    };
+    this.eventEmitter.emit(NOTIFICATION_EVENTS.PROFILE_UPDATED, event);
+    this.logger.log(`Emitted PROFILE_UPDATED event for user ${userId}, updated field: email`);
+
     return this.otpService.generateAndSendOtp({
       userId,
       recipient: email,