From 883b7cf3b24118a1aa3bbb8d60b88162a58113ec Mon Sep 17 00:00:00 2001
From: Craig Raw <craigraw@gmail.com>
Date: Mon, 6 Apr 2026 09:12:13 +0200
Subject: [PATCH] fix concurrent modification of descriptor maps in bitcoind
 client

---
 .../sparrow/net/cormorant/bitcoind/BitcoindClient.java        | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/sparrowwallet/sparrow/net/cormorant/bitcoind/BitcoindClient.java b/src/main/java/com/sparrowwallet/sparrow/net/cormorant/bitcoind/BitcoindClient.java
index 5fd49920..08086952 100644
--- a/src/main/java/com/sparrowwallet/sparrow/net/cormorant/bitcoind/BitcoindClient.java
+++ b/src/main/java/com/sparrowwallet/sparrow/net/cormorant/bitcoind/BitcoindClient.java
@@ -66,8 +66,8 @@ public class BitcoindClient {
     private final Map<String, Lock> descriptorLocks = Collections.synchronizedMap(new HashMap<>());
     private final Map<String, ScanDate> importedDescriptors = Collections.synchronizedMap(new HashMap<>());
 
-    private final Map<String, Date> descriptorBirthDates = new HashMap<>();
-    private final Map<String, Integer> descriptorUsedIndexes = new HashMap<>();
+    private final Map<String, Date> descriptorBirthDates = Collections.synchronizedMap(new HashMap<>());
+    private final Map<String, Integer> descriptorUsedIndexes = new ConcurrentHashMap<>();
 
     private boolean initialized;
     private boolean stopped;