Test env NATS cluster cut-over

src/lib/receiptPdf.js

@@ -0,0 +1,89 @@
+/**
+ * Branded PDF retrieval receipt (no native deps).
+ * @module lib/receiptPdf
+ */
+
+function pdfEscape(s) {
+  return String(s).replace(/\\/g, '\\\\').replace(/\(/g, '\\(').replace(/\)/g, '\\)');
+}
+
+function wrap(s, n) {
+  const str = String(s || '');
+  const out = [];
+  for (let i = 0; i < str.length; i += n) out.push(str.slice(i, i + n));
+  return out.length ? out : [''];
+}
+
+/**
+ * @param {object} receipt
+ * @returns {Buffer}
+ */
+export function buildReceiptPdf(receipt) {
+  const lines = [];
+  const add = (label, value) => {
+    lines.push({ kind: 'label', text: label });
+    wrap(value, 86).forEach((t) => lines.push({ kind: 'value', text: t }));
+    lines.push({ kind: 'gap' });
+  };
+  add('Job ID', receipt.jobId);
+  add('SHA-256', receipt.sha256 ?? '');
+  add('Original timestamp', receipt.timestamp ?? '');
+  add('Retrieved at', receipt.extraSeal?.retrievedAt ?? '');
+  add('Tenant', receipt.extraSeal?.tenantId ?? '');
+  add('Seal event', receipt.extraSeal?.event ?? '');
+  add('Certificate', String(receipt.certificate ?? '').slice(0, 240));
+
+  const ops = [];
+  ops.push('0.192 0.180 0.506 rg');
+  ops.push('0 742 612 50 re f');
+  ops.push('1 1 1 rg');
+  ops.push('BT /F1 16 Tf 36 760 Td (Verae Time) Tj ET');
+  ops.push('BT /F1 9 Tf 36 746 Td (CERTIFIED RETRIEVAL RECEIPT) Tj ET');
+  ops.push('0.09 0.10 0.15 rg');
+  let y = 710;
+  for (const line of lines) {
+    if (line.kind === 'gap') {
+      y -= 8;
+      continue;
+    }
+    const size = line.kind === 'label' ? 8 : 11;
+    ops.push(`BT /F1 ${size} Tf 36 ${y} Td (${pdfEscape(line.text)}) Tj ET`);
+    y -= line.kind === 'label' ? 12 : 14;
+  }
+  ops.push('0.192 0.180 0.506 rg');
+  ops.push('36 48 540 0.8 re f');
+  ops.push('0.42 0.44 0.52 rg');
+  ops.push(
+    'BT /F1 8 Tf 36 34 Td (This is a certified retrieval receipt. The extra-seal event is recorded with the hash. It is not a substitute for the chain record.) Tj ET',
+  );
+  ops.push(
+    `BT /F1 8 Tf 36 22 Td (${pdfEscape('Verae Time x Zapier  ·  type ' + (receipt.type || 'verae.retrieval-receipt'))}) Tj ET`,
+  );
+
+  const stream = `${ops.join('\n')}\n`;
+  const objects = [
+    '1 0 obj << /Type /Catalog /Pages 2 0 R >> endobj',
+    '2 0 obj << /Type /Pages /Kids [3 0 R] /Count 1 >> endobj',
+    '3 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 612 792] /Contents 4 0 R /Resources << /Font << /F1 5 0 R >> >> >> endobj',
+    `4 0 obj << /Length ${Buffer.byteLength(stream)} >> stream\n${stream}endstream endobj`,
+    '5 0 obj << /Type /Font /Subtype /Type1 /BaseFont /Helvetica >> endobj',
+  ];
+
+  let offset = '%PDF-1.4\n'.length;
+  const xref = [0];
+  let body = '%PDF-1.4\n';
+  for (const obj of objects) {
+    xref.push(offset);
+    const chunk = `${obj}\n`;
+    body += chunk;
+    offset += Buffer.byteLength(chunk);
+  }
+  const xrefStart = offset;
+  let xrefTable = `xref\n0 ${objects.length + 1}\n0000000000 65535 f \n`;
+  for (let i = 1; i < xref.length; i += 1) {
+    xrefTable += `${String(xref[i]).padStart(10, '0')} 00000 n \n`;
+  }
+  body += xrefTable;
+  body += `trailer << /Size ${objects.length + 1} /Root 1 0 R >>\nstartxref\n${xrefStart}\n%%EOF\n`;
+  return Buffer.from(body, 'utf8');
+}