From 22b8e07dd13e33e8b7f2f2e73f9ddc3f9d0a5078 Mon Sep 17 00:00:00 2001
From: Bernd Storath <999999bst@gmail.com>
Date: Tue, 18 Nov 2025 09:20:28 +0100
Subject: [PATCH] try ecc levels

---
 src/server/utils/WireGuard.ts | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/server/utils/WireGuard.ts b/src/server/utils/WireGuard.ts
index 2da26fce..048d866d 100644
--- a/src/server/utils/WireGuard.ts
+++ b/src/server/utils/WireGuard.ts
@@ -166,11 +166,24 @@ class WireGuard {
 
   async getClientQRCodeSVG({ clientId }: { clientId: ID }) {
     const config = await this.getClientConfiguration({ clientId });
-    return encodeQR(config, 'svg', {
-      ecc: 'high',
-      scale: 2,
-      encoding: 'byte',
-    });
+    const ECMode = ['high', 'quartile', 'medium', 'low'] as const;
+    for (const ecc of ECMode) {
+      try {
+        return encodeQR(config, 'svg', {
+          ecc,
+          scale: 2,
+          encoding: 'byte',
+        });
+      } catch (err) {
+        if (!(err instanceof Error && err.message === 'Capacity overflow')) {
+          throw err;
+        }
+        // retry with lower ecc
+      }
+    }
+    throw new Error(
+      'Failed to generate QR code: Capacity overflow at all ECC levels'
+    );
   }
 
   cleanClientFilename(name: string): string {