Add validation to prevent duplicate host accounts in addPaymentDetails method

src/modules/host/services/host.service.ts

@@ -368,6 +368,19 @@ export class HostService {
 
   async addPaymentDetails(data: AddPaymentDetailsDTO) {
     return await this.prisma.$transaction(async (tx) => {
+      const existingAccount = await tx.hostBankDetails.findFirst({
+        where: {
+          accountNumber: data.accountNumber,
+          isActive: true,
+        },
+      });
+
+      if (existingAccount) {
+        throw new ApiError(
+          400,
+          'Host account with this account number already exists.'
+        );
+      }
       const addedPaymentDetails = await tx.hostBankDetails.create({
         data,
       });