From 910a400b18a83f4db36159337090432b7ee1e558 Mon Sep 17 00:00:00 2001
From: Craig Raw <craigraw@gmail.com>
Date: Tue, 7 Nov 2023 11:58:18 +0200
Subject: [PATCH] fix computation of master fingerprint for satochip

---
 .../com/sparrowwallet/sparrow/io/satochip/SatoCardApi.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/sparrowwallet/sparrow/io/satochip/SatoCardApi.java b/src/main/java/com/sparrowwallet/sparrow/io/satochip/SatoCardApi.java
index b7b4cbb9..5be4b3ac 100644
--- a/src/main/java/com/sparrowwallet/sparrow/io/satochip/SatoCardApi.java
+++ b/src/main/java/com/sparrowwallet/sparrow/io/satochip/SatoCardApi.java
@@ -139,7 +139,9 @@ public class SatoCardApi extends CardApi {
         ExtendedKey.Header xtype = Network.get().getXpubHeader();
         String xpub = this.cardProtocol.cardBip32GetXpub(keyDerivationString, xtype);
         ExtendedKey extendedKey = ExtendedKey.fromDescriptor(xpub);
-        String masterFingerprint = Utils.bytesToHex(extendedKey.getKey().getFingerprint());
+        String masterXpub = this.cardProtocol.cardBip32GetXpub("m", xtype);
+        ExtendedKey masterExtendedKey = ExtendedKey.fromDescriptor(masterXpub);
+        String masterFingerprint = Utils.bytesToHex(masterExtendedKey.getKey().getFingerprint());
         KeyDerivation keyDerivation = new KeyDerivation(masterFingerprint, keyDerivationString);
 
         Keystore keystore = new Keystore();