functions/src/payments/phonepe/invoice/invoiceService.ts

@@ -4,10 +4,18 @@ import * as os from 'os';
 import * as path from 'path';
 import { format } from 'date-fns';
 import { sendEmailWithAttachmentUtil } from "../../../utils/emailService";
-import * as pdfMake from 'pdfmake/build/pdfmake';
-import * as pdfFonts from 'pdfmake/build/vfs_fonts';
 
-(pdfMake as any).vfs = (pdfFonts as any).pdfMake ? (pdfFonts as any).pdfMake.vfs : pdfFonts.vfs;
+let pdfMake: any;
+let pdfFonts: any;
+
+function initPdfLibraries() {
+  if (!pdfMake) {
+    pdfMake = require('pdfmake/build/pdfmake');
+    pdfFonts = require('pdfmake/build/vfs_fonts');
+    pdfMake.vfs = pdfFonts.pdfMake ? pdfFonts.pdfMake.vfs : pdfFonts.vfs;
+  }
+  return pdfMake;
+}
 
 const admin = getAdmin();
 const logger = getLogger();
@@ -45,6 +53,7 @@ export interface EmailOptions {
 export class InvoiceService {
   async generateInvoice(data: InvoiceData): Promise<string> {
     try {
+      const pdfMake = initPdfLibraries();
       const tempFilePath = path.join(os.tmpdir(), `invoice_${data.invoiceNumber}.pdf`);
       
       const hasGst = data.gstNumber && data.gstNumber.length > 0;
@@ -255,7 +264,7 @@ export class InvoiceService {
       const pdfDoc = pdfMake.createPdf(docDefinition);
       
       await new Promise<void>((resolve, reject) => {
-        pdfDoc.getBuffer((buffer) => {
+        pdfDoc.getBuffer((buffer: Buffer) => {
           fs.writeFile(tempFilePath, buffer, (err) => {
             if (err) reject(err);
             else resolve();