Hide signature widget border for FirmaEC and bump to 1.2.23

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "linkedsign-backend",
-  "version": "1.2.22",
+  "version": "1.2.23",
   "private": true,
   "description": "Initial backend for LinkedSign",
   "main": "src/server.js",

backend/src/modules/signing/signing.service.js

@@ -1,7 +1,7 @@
 const fs = require('fs/promises');
 const path = require('path');
 const QRCode = require('qrcode');
-const { PDFDocument, rgb, StandardFonts } = require('pdf-lib');
+const { PDFDocument, PDFArray, PDFName, PDFNumber, rgb, StandardFonts } = require('pdf-lib');
 const { pdflibAddPlaceholder } = require('@signpdf/placeholder-pdf-lib');
 const { SignPdf } = require('@signpdf/signpdf');
 const { P12Signer } = require('@signpdf/signer-p12');
@@ -87,6 +87,34 @@ function buildLocalizedSignatureTimestamp({ locale, timeZone } = {}) {
   }
 }
 
+function hideSignatureWidgetBorder(pdfDoc, pageIndex) {
+  const page = pdfDoc.getPages()[pageIndex];
+  if (!page) return;
+
+  const annotations = page.node.lookupMaybe(PDFName.of('Annots'), PDFArray);
+  if (!annotations || annotations.size() === 0) return;
+
+  const widgetRef = annotations.get(annotations.size() - 1);
+  const widget = pdfDoc.context.lookup(widgetRef);
+  if (!widget) return;
+
+  const zeroBorder = PDFArray.withContext(pdfDoc.context);
+  zeroBorder.push(PDFNumber.of(0));
+  zeroBorder.push(PDFNumber.of(0));
+  zeroBorder.push(PDFNumber.of(0));
+
+  widget.set(PDFName.of('Border'), zeroBorder);
+  widget.set(PDFName.of('BS'), pdfDoc.context.obj({
+    Type: 'Border',
+    W: 0,
+    S: 'S',
+  }));
+  widget.set(PDFName.of('MK'), pdfDoc.context.obj({
+    BC: [],
+    BG: [],
+  }));
+}
+
 // ── Style: CLASSIC (blue bar + DS badge) ──────────────────────────────────────
 async function drawStyleClassic(pdfDoc, page, sx, sy, sw, sh, { signerName, reason, dateStr, timeStr, location }) {
   const f1 = await pdfDoc.embedFont(StandardFonts.HelveticaBold);
@@ -391,6 +419,7 @@ const signPdf = async ({
 
   // ── Add cryptographic signature placeholder ───────────────────────
   const pdfDocForSign = await PDFDocument.load(pdfWithStamp);
+  const placeholderPageIndex = Math.min(page, pdfDocForSign.getPageCount() - 1);
   pdflibAddPlaceholder({
     pdfDoc: pdfDocForSign,
     reason: reason || 'Firma digital',
@@ -399,8 +428,9 @@ const signPdf = async ({
     location: location || '',
     signatureLength: 32768,
     rect: [sx, sy, sx + sw, sy + sh],
-    pageIndex: Math.min(page, pdfDocForSign.getPageCount() - 1),
+    pageIndex: placeholderPageIndex,
   });
+  hideSignatureWidgetBorder(pdfDocForSign, placeholderPageIndex);
 
   const pdfWithPlaceholder = Buffer.from(await pdfDocForSign.save({ useObjectStreams: false }));