mirror of
https://github.com/HamzaSha1/zod-backend.git
synced 2026-03-10 15:11:46 +00:00
feat: refine transaction notification listener for improved balance calculations
- Updated TransactionNotificationListener to differentiate between child top-up and spending notifications, ensuring accurate balance retrieval. - Enhanced error handling and fallback mechanisms for both child and parent account balance fetching. - Improved logging to provide detailed insights into balance calculations, including available balance after accounting for reserved amounts.
This commit is contained in:
Abdalhamid Alhamad
@ -105,39 +105,59 @@ export class TransactionNotificationListener {
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const amount = transaction.transactionAmount;
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const merchant = transaction.merchantName || 'merchant';
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// Fetch account by reference number to get fresh balance (bypasses entity cache)
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// This ensures we get the updated balance after the transaction
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// For child top-up notifications, show card.limit (newAmount) instead of account balance
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// card.limit represents the total spending limit on the card after the transfer
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let balance = 0;
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let accountCurrency: string | undefined;
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try {
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// Reload card to get account reference
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const cardWithUpdatedBalance = await this.cardService.getCardById(card.id);
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if (cardWithUpdatedBalance?.account?.accountReference) {
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// Fetch by reference number to get fresh balance from database
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const account = await this.accountService.getAccountByReferenceNumber(
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cardWithUpdatedBalance.account.accountReference
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);
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balance = account.balance;
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accountCurrency = account.currency;
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if (isTopUp) {
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// For top-up: show card limit (newAmount from transfer response)
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try {
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// Reload card to get updated limit
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const cardWithUpdatedLimit = await this.cardService.getCardById(card.id);
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balance = cardWithUpdatedLimit.limit || card.limit || 0;
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accountCurrency = cardWithUpdatedLimit.account?.currency || card.account?.currency;
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this.logger.debug(
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`[Child Notification] Fetched account by reference - balance: ${balance} ${accountCurrency}`
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`[Child Top-Up Notification] Using card limit (newAmount) - limit: ${balance} ${accountCurrency}`
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);
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} else {
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// Fallback: use card's account balance
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balance = cardWithUpdatedBalance.account?.balance || card.account?.balance || 0;
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accountCurrency = cardWithUpdatedBalance.account?.currency || card.account?.currency;
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this.logger.debug(
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`[Child Notification] Using card account balance - balance: ${balance} ${accountCurrency}`
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} catch (error: any) {
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this.logger.warn(
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`[Child Top-Up Notification] Could not reload card: ${error?.message}. Using card limit from event.`
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);
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balance = card.limit || 0;
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accountCurrency = card.account?.currency;
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}
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} else {
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// For spending: show account balance
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try {
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// Reload card to get account reference
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const cardWithUpdatedBalance = await this.cardService.getCardById(card.id);
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if (cardWithUpdatedBalance?.account?.accountReference) {
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// Fetch by reference number to get fresh balance from database
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const account = await this.accountService.getAccountByReferenceNumber(
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cardWithUpdatedBalance.account.accountReference
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);
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balance = account.balance;
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accountCurrency = account.currency;
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this.logger.debug(
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`[Child Spending Notification] Fetched account by reference - balance: ${balance} ${accountCurrency}`
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);
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} else {
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// Fallback: use card's account balance
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balance = cardWithUpdatedBalance.account?.balance || card.account?.balance || 0;
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accountCurrency = cardWithUpdatedBalance.account?.currency || card.account?.currency;
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this.logger.debug(
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`[Child Spending Notification] Using card account balance - balance: ${balance} ${accountCurrency}`
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);
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}
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} catch (error: any) {
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this.logger.warn(
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`[Child Spending Notification] Could not fetch account by reference: ${error?.message}. Using card account balance.`
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);
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// Fallback: use card's account balance
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balance = card.account?.balance || 0;
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accountCurrency = card.account?.currency;
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}
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} catch (error: any) {
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this.logger.warn(
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`[Child Notification] Could not fetch account by reference: ${error?.message}. Using card account balance.`
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);
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// Fallback: use card's account balance
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balance = card.account?.balance || 0;
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accountCurrency = card.account?.currency;
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}
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const currency = getCurrency(
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accountCurrency,
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@ -362,13 +382,16 @@ export class TransactionNotificationListener {
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const amount = transaction.transactionAmount;
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// Fetch parent account by reference number to get fresh balance (bypasses entity cache)
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// This ensures we get the updated balance after the transfer
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// For parent notification, show available_balance = balance - reserved_balance
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let parentAccountBalance = 0;
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let parentAccountReservedBalance = 0;
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let parentAccountCurrency: string | undefined;
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let availableBalance = 0;
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if (card.parentId) {
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try {
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// Get parent's card to access their account reference
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// card.parentId is the parent's CUSTOMER ID
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const parentCard = await this.cardService.getCardByCustomerId(card.parentId);
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if (parentCard?.account?.accountReference) {
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// Fetch by reference number to get fresh balance from database
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@ -376,24 +399,28 @@ export class TransactionNotificationListener {
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parentCard.account.accountReference
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);
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parentAccountBalance = parentAccount.balance;
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parentAccountReservedBalance = parentAccount.reservedBalance;
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availableBalance = parentAccountBalance - parentAccountReservedBalance;
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parentAccountCurrency = parentAccount.currency;
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this.logger.debug(
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`[Parent Top-Up] Fetched parent account by reference - balance: ${parentAccountBalance} ${parentAccountCurrency}`
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`[Parent Top-Up] Fetched parent account by reference - balance: ${parentAccountBalance}, reserved: ${parentAccountReservedBalance}, available: ${availableBalance} ${parentAccountCurrency}`
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);
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} else {
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// Fallback: try by customer ID
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const parentAccount = await this.accountService.getAccountByCustomerId(card.parentId);
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parentAccountBalance = parentAccount.balance;
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parentAccountReservedBalance = parentAccount.reservedBalance;
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availableBalance = parentAccountBalance - parentAccountReservedBalance;
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parentAccountCurrency = parentAccount.currency;
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this.logger.debug(
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`[Parent Top-Up] Fetched parent account by customer ID - balance: ${parentAccountBalance} ${parentAccountCurrency}`
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`[Parent Top-Up] Fetched parent account by customer ID - balance: ${parentAccountBalance}, reserved: ${parentAccountReservedBalance}, available: ${availableBalance} ${parentAccountCurrency}`
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);
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}
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} catch (error: any) {
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this.logger.warn(
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`[Parent Top-Up] Could not fetch parent account for customer ${card.parentId}: ${error?.message}. Using child account balance as fallback.`
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);
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parentAccountBalance = card.account?.balance || 0;
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availableBalance = card.account?.balance || 0;
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parentAccountCurrency = card.account?.currency;
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}
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} else {
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@ -407,32 +434,37 @@ export class TransactionNotificationListener {
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parentCard.account.accountReference
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);
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parentAccountBalance = parentAccount.balance;
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parentAccountReservedBalance = parentAccount.reservedBalance;
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availableBalance = parentAccountBalance - parentAccountReservedBalance;
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parentAccountCurrency = parentAccount.currency;
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this.logger.debug(
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`[Parent Top-Up] Fetched parent account via customer relation (by reference) - balance: ${parentAccountBalance} ${parentAccountCurrency}`
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`[Parent Top-Up] Fetched parent account via customer relation (by reference) - balance: ${parentAccountBalance}, reserved: ${parentAccountReservedBalance}, available: ${availableBalance} ${parentAccountCurrency}`
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);
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} else {
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const parentAccount = await this.accountService.getAccountByCustomerId(parentCustomer.id);
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parentAccountBalance = parentAccount.balance;
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parentAccountReservedBalance = parentAccount.reservedBalance;
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availableBalance = parentAccountBalance - parentAccountReservedBalance;
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parentAccountCurrency = parentAccount.currency;
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this.logger.debug(
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`[Parent Top-Up] Fetched parent account via customer relation - balance: ${parentAccountBalance} ${parentAccountCurrency}`
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`[Parent Top-Up] Fetched parent account via customer relation - balance: ${parentAccountBalance}, reserved: ${parentAccountReservedBalance}, available: ${availableBalance} ${parentAccountCurrency}`
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);
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}
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} catch (error: any) {
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this.logger.warn(
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`[Parent Top-Up] Could not fetch parent account via customer: ${error?.message}. Using child account balance as fallback.`
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);
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parentAccountBalance = card.account?.balance || 0;
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availableBalance = card.account?.balance || 0;
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parentAccountCurrency = card.account?.currency;
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}
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} else {
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parentAccountBalance = card.account?.balance || 0;
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availableBalance = card.account?.balance || 0;
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parentAccountCurrency = card.account?.currency;
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}
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}
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const balance = parentAccountBalance;
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// Use available_balance for parent notification (balance - reserved_balance)
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const balance = availableBalance;
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const accountCurrency = parentAccountCurrency;
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const currency = getCurrency(
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accountCurrency,
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