4 files changed, 56 insertions, 3 deletions
diff --git a/src/common/bloom.cpp b/src/common/bloom.cpp
index aa3fcf1ce2..3ba0414b31 100644
--- a/src/common/bloom.cpp
+++ b/src/common/bloom.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2012-2021 The Bitcoin Core developers
+// Copyright (c) 2012-2022 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/common/interfaces.cpp b/src/common/interfaces.cpp
new file mode 100644
index 0000000000..c8bbe2b3c0
--- /dev/null
+++ b/src/common/interfaces.cpp
@@ -0,0 +1,53 @@
+// Copyright (c) 2021-2022 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <interfaces/echo.h>
+#include <interfaces/handler.h>
+
+#include <boost/signals2/connection.hpp>
+#include <memory>
+#include <utility>
+
+namespace common {
+namespace {
+class CleanupHandler : public interfaces::Handler
+{
+public:
+    explicit CleanupHandler(std::function<void()> cleanup) : m_cleanup(std::move(cleanup)) {}
+    ~CleanupHandler() override { if (!m_cleanup) return; m_cleanup(); m_cleanup = nullptr; }
+    void disconnect() override { if (!m_cleanup) return; m_cleanup(); m_cleanup = nullptr; }
+    std::function<void()> m_cleanup;
+};
+
+class SignalHandler : public interfaces::Handler
+{
+public:
+    explicit SignalHandler(boost::signals2::connection connection) : m_connection(std::move(connection)) {}
+
+    void disconnect() override { m_connection.disconnect(); }
+
+    boost::signals2::scoped_connection m_connection;
+};
+
+class EchoImpl : public interfaces::Echo
+{
+public:
+    std::string echo(const std::string& echo) override { return echo; }
+};
+} // namespace
+} // namespace common
+
+namespace interfaces {
+std::unique_ptr<Handler> MakeCleanupHandler(std::function<void()> cleanup)
+{
+    return std::make_unique<common::CleanupHandler>(std::move(cleanup));
+}
+
+std::unique_ptr<Handler> MakeSignalHandler(boost::signals2::connection connection)
+{
+    return std::make_unique<common::SignalHandler>(std::move(connection));
+}
+
+std::unique_ptr<Echo> MakeEcho() { return std::make_unique<common::EchoImpl>(); }
+} // namespace interfaces
diff --git a/src/common/url.cpp b/src/common/url.cpp
index 5200d55096..053e1a825c 100644
--- a/src/common/url.cpp
+++ b/src/common/url.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2019 The Bitcoin Core developers
+// Copyright (c) 2015-2022 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
diff --git a/src/common/url.h b/src/common/url.h
index 7bbd8b60de..b16b8241af 100644
--- a/src/common/url.h
+++ b/src/common/url.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2015-2020 The Bitcoin Core developers
+// Copyright (c) 2015-2022 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.