From 091736a153c8eeedfd8d43eb8a3d4a1d6348fe79 Mon Sep 17 00:00:00 2001
From: Cory Fields <cory-nospam-@coryfields.com>
Date: Tue, 3 Feb 2026 20:17:49 +0000
Subject: [PATCH] signals: re-add forward-declares to interface headers

The real includes were only needed temporarily while supporting btcsignals as
an alias for boost::signals2.
---
 src/interfaces/handler.h | 6 ++++--
 src/node/interface_ui.h  | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/interfaces/handler.h b/src/interfaces/handler.h
index 09c2363891f..a68af21a0c5 100644
--- a/src/interfaces/handler.h
+++ b/src/interfaces/handler.h
@@ -5,11 +5,13 @@
 #ifndef BITCOIN_INTERFACES_HANDLER_H
 #define BITCOIN_INTERFACES_HANDLER_H
 
-#include <btcsignals.h>
-
 #include <functional>
 #include <memory>
 
+namespace btcsignals {
+    class connection;
+} // namespace btcsignals
+
 namespace interfaces {
 
 //! Generic interface for managing an event handler or callback function
diff --git a/src/node/interface_ui.h b/src/node/interface_ui.h
index c33df59a93a..8175683f9fa 100644
--- a/src/node/interface_ui.h
+++ b/src/node/interface_ui.h
@@ -6,8 +6,6 @@
 #ifndef BITCOIN_NODE_INTERFACE_UI_H
 #define BITCOIN_NODE_INTERFACE_UI_H
 
-#include <btcsignals.h>
-
 #include <cstdint>
 #include <functional>
 #include <string>
@@ -17,6 +15,10 @@ class CBlockIndex;
 enum class SynchronizationState;
 struct bilingual_str;
 
+namespace btcsignals {
+    class connection;
+} // namespace btcsignals
+
 /** Signals for UI communication. */
 class CClientUIInterface
 {