From fdfb55d3e259c05bf7523c7308de0f1b8529f923 Mon Sep 17 00:00:00 2001
From: Matheus Marrane <matheusmarrane@gmail.com>
Date: Sun, 5 Jan 2025 14:23:52 -0300
Subject: [PATCH] fix: ensure bech32 addresses use uppercase as per BIP 0173

- Adjusted QR code generation to use uppercase for bech32 addresses, aligning with BIP 0173 specifications for optimal QR encoding efficiency.
---
 class/deeplink-schema-match.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/class/deeplink-schema-match.ts b/class/deeplink-schema-match.ts
index 1b36387ad..27d3c0c20 100644
--- a/class/deeplink-schema-match.ts
+++ b/class/deeplink-schema-match.ts
@@ -413,6 +413,12 @@ class DeeplinkSchemaMatch {
   }
 
   static bip21encode(address: string, options: TOptions): string {
+    //uppercase address if bech32 to satisfy BIP_0173
+    const isBech32 = address.startsWith('bc1');
+    if (isBech32) {
+      address = address.toUpperCase();
+    }
+
     for (const key in options) {
       if (key === 'label' && String(options[key]).replace(' ', '').length === 0) {
         delete options[key];