Add not_found protocol overrides at bip37.

builds/gnu/Makefile.am

@@ -77,6 +77,7 @@ src_libbitcoin_node_la_SOURCES = \
     ${srcdir}/../../src/protocols/protocol_block_in_106.cpp \
     ${srcdir}/../../src/protocols/protocol_block_in_31800.cpp \
     ${srcdir}/../../src/protocols/protocol_block_out_106.cpp \
+    ${srcdir}/../../src/protocols/protocol_block_out_70001.cpp \
     ${srcdir}/../../src/protocols/protocol_block_out_70012.cpp \
     ${srcdir}/../../src/protocols/protocol_filter_out_70015.cpp \
     ${srcdir}/../../src/protocols/protocol_header_in_31800.cpp \
@@ -88,6 +89,7 @@ src_libbitcoin_node_la_SOURCES = \
     ${srcdir}/../../src/protocols/protocol_performer.cpp \
     ${srcdir}/../../src/protocols/protocol_transaction_in_106.cpp \
     ${srcdir}/../../src/protocols/protocol_transaction_out_106.cpp \
+    ${srcdir}/../../src/protocols/protocol_transaction_out_70001.cpp \
     ${srcdir}/../../src/sessions/session.cpp \
     ${srcdir}/../../src/sessions/session_inbound.cpp \
     ${srcdir}/../../src/sessions/session_manual.cpp \
@@ -162,6 +164,7 @@ include_bitcoin_node_protocols_HEADERS = \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_block_in_106.hpp \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_block_in_31800.hpp \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_block_out_106.hpp \
+    ${srcdir}/../../include/bitcoin/node/protocols/protocol_block_out_70001.hpp \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_block_out_70012.hpp \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_filter_out_70015.hpp \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_header_in_31800.hpp \
@@ -173,6 +176,7 @@ include_bitcoin_node_protocols_HEADERS = \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_performer.hpp \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_transaction_in_106.hpp \
     ${srcdir}/../../include/bitcoin/node/protocols/protocol_transaction_out_106.hpp \
+    ${srcdir}/../../include/bitcoin/node/protocols/protocol_transaction_out_70001.hpp \
     ${srcdir}/../../include/bitcoin/node/protocols/protocols.hpp
 
 include_bitcoin_node_sessionsdir = \

builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.vcxproj

@@ -146,6 +146,7 @@
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_in_106.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_in_31800.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_106.cpp" />
+    <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_70001.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_70012.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_filter_out_70015.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_header_in_31800.cpp" />
@@ -157,6 +158,7 @@
     <ClCompile Include="..\..\..\..\src\protocols\protocol_performer.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_in_106.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_out_106.cpp" />
+    <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_out_70001.cpp" />
     <ClCompile Include="..\..\..\..\src\sessions\session.cpp" />
     <ClCompile Include="..\..\..\..\src\sessions\session_inbound.cpp" />
     <ClCompile Include="..\..\..\..\src\sessions\session_manual.cpp" />
@@ -196,6 +198,7 @@
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_in_106.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_in_31800.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_106.hpp" />
+    <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_70001.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_70012.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_filter_out_70015.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_header_in_31800.hpp" />
@@ -207,6 +210,7 @@
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_performer.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_in_106.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_out_106.hpp" />
+    <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_out_70001.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocols.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\sessions\session.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\sessions\session_inbound.hpp" />

builds/msvc/vs2022/libbitcoin-node/libbitcoin-node.vcxproj.filters

@@ -132,6 +132,9 @@
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_106.cpp">
       <Filter>src\protocols</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_70001.cpp">
+      <Filter>src\protocols</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_70012.cpp">
       <Filter>src\protocols</Filter>
     </ClCompile>
@@ -165,6 +168,9 @@
     <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_out_106.cpp">
       <Filter>src\protocols</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_out_70001.cpp">
+      <Filter>src\protocols</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\src\sessions\session.cpp">
       <Filter>src\sessions</Filter>
     </ClCompile>
@@ -278,6 +284,9 @@
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_106.hpp">
       <Filter>include\bitcoin\node\protocols</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_70001.hpp">
+      <Filter>include\bitcoin\node\protocols</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_70012.hpp">
       <Filter>include\bitcoin\node\protocols</Filter>
     </ClInclude>
@@ -311,6 +320,9 @@
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_out_106.hpp">
       <Filter>include\bitcoin\node\protocols</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_out_70001.hpp">
+      <Filter>include\bitcoin\node\protocols</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocols.hpp">
       <Filter>include\bitcoin\node\protocols</Filter>
     </ClInclude>

builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.vcxproj

@@ -146,6 +146,7 @@
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_in_106.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_in_31800.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_106.cpp" />
+    <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_70001.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_70012.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_filter_out_70015.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_header_in_31800.cpp" />
@@ -157,6 +158,7 @@
     <ClCompile Include="..\..\..\..\src\protocols\protocol_performer.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_in_106.cpp" />
     <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_out_106.cpp" />
+    <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_out_70001.cpp" />
     <ClCompile Include="..\..\..\..\src\sessions\session.cpp" />
     <ClCompile Include="..\..\..\..\src\sessions\session_inbound.cpp" />
     <ClCompile Include="..\..\..\..\src\sessions\session_manual.cpp" />
@@ -196,6 +198,7 @@
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_in_106.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_in_31800.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_106.hpp" />
+    <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_70001.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_70012.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_filter_out_70015.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_header_in_31800.hpp" />
@@ -207,6 +210,7 @@
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_performer.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_in_106.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_out_106.hpp" />
+    <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_out_70001.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocols.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\sessions\session.hpp" />
     <ClInclude Include="..\..\..\..\include\bitcoin\node\sessions\session_inbound.hpp" />

builds/msvc/vs2026/libbitcoin-node/libbitcoin-node.vcxproj.filters

@@ -132,6 +132,9 @@
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_106.cpp">
       <Filter>src\protocols</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_70001.cpp">
+      <Filter>src\protocols</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\src\protocols\protocol_block_out_70012.cpp">
       <Filter>src\protocols</Filter>
     </ClCompile>
@@ -165,6 +168,9 @@
     <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_out_106.cpp">
       <Filter>src\protocols</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\src\protocols\protocol_transaction_out_70001.cpp">
+      <Filter>src\protocols</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\src\sessions\session.cpp">
       <Filter>src\sessions</Filter>
     </ClCompile>
@@ -278,6 +284,9 @@
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_106.hpp">
       <Filter>include\bitcoin\node\protocols</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_70001.hpp">
+      <Filter>include\bitcoin\node\protocols</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_block_out_70012.hpp">
       <Filter>include\bitcoin\node\protocols</Filter>
     </ClInclude>
@@ -311,6 +320,9 @@
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_out_106.hpp">
       <Filter>include\bitcoin\node\protocols</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocol_transaction_out_70001.hpp">
+      <Filter>include\bitcoin\node\protocols</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\..\..\include\bitcoin\node\protocols\protocols.hpp">
       <Filter>include\bitcoin\node\protocols</Filter>
     </ClInclude>

include/bitcoin/node/impl/sessions/session_peer.ipp

@@ -140,22 +140,25 @@ inline void CLASS::attach_protocols(const channel_ptr& channel) NOEXCEPT
             channel->attach<protocol_header_out_70012>(self)->start();
             channel->attach<protocol_block_out_70012>(self)->start();
         }
-        else if (headers && peer->is_negotiated(level::headers_protocol))
-        {
-            channel->attach<protocol_header_out_31800>(self)->start();
-            channel->attach<protocol_block_out_106>(self)->start();
-        }
         else
         {
-            channel->attach<protocol_block_out_106>(self)->start();
+            if (headers && peer->is_negotiated(level::headers_protocol))
+                channel->attach<protocol_header_out_31800>(self)->start();
+
+            // not_found is defined at bip37.
+            if (peer->is_negotiated(level::bip37))
+                channel->attach<protocol_block_out_70001>(self)->start();
+            else
+                channel->attach<protocol_block_out_106>(self)->start();
         }
     }
 
     // Relay is configured, active, and txs are ready (txs in/out).
     if (txs_in_out)
     {
+        // Attached above bip37, where not_found is defined.
         if (peer->peer_version()->relay)
-            channel->attach<protocol_transaction_out_106>(self)->start();
+            channel->attach<protocol_transaction_out_70001>(self)->start();
     }
 }
 

include/bitcoin/node/protocols/protocol_block_out_106.hpp

@@ -54,6 +54,7 @@ class BCN_API protocol_block_out_106
 protected:
     using get_data = network::messages::peer::get_data;
     using get_blocks = network::messages::peer::get_blocks;
+    using inventory_item = network::messages::peer::inventory_item;
 
     /// Block announcements are superseded by send_headers.
     virtual bool superseded() const NOEXCEPT;
@@ -71,9 +72,11 @@ class BCN_API protocol_block_out_106
         const get_data::cptr& message) NOEXCEPT;
     virtual void send_block(const code& ec) NOEXCEPT;
 
+    /// The requested item cannot be served, stops the channel.
+    virtual void handle_unservable(const inventory_item& item) NOEXCEPT;
+
 private:
     using inventory = network::messages::peer::inventory;
-    using inventory_item = network::messages::peer::inventory_item;
     using inventory_items = network::messages::peer::inventory_items;
 
     bool is_under_checkpoint(const database::header_link& link) NOEXCEPT;

include/bitcoin/node/protocols/protocol_block_out_70001.hpp

@@ -0,0 +1,55 @@
+/**
+ * Copyright (c) 2011-2026 libbitcoin developers
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NODE_PROTOCOLS_PROTOCOL_BLOCK_OUT_70001_HPP
+#define LIBBITCOIN_NODE_PROTOCOLS_PROTOCOL_BLOCK_OUT_70001_HPP
+
+#include <bitcoin/node/define.hpp>
+#include <bitcoin/node/protocols/protocol_block_out_106.hpp>
+
+namespace libbitcoin {
+namespace node {
+
+class BCN_API protocol_block_out_70001
+  : public protocol_block_out_106,
+    protected network::tracker<protocol_block_out_70001>
+{
+public:
+    typedef std::shared_ptr<protocol_block_out_70001> ptr;
+
+    protocol_block_out_70001(const auto& session,
+        const network::channel::ptr& channel) NOEXCEPT
+      : protocol_block_out_106(session, channel),
+        enable_not_found_(session->network_settings().enable_not_found),
+        network::tracker<protocol_block_out_70001>(session->log)
+    {
+    }
+
+protected:
+    /// The requested item cannot be served, replies not_found.
+    void handle_unservable(const inventory_item& item) NOEXCEPT override;
+
+private:
+    // This is thread safe.
+    const bool enable_not_found_;
+};
+
+} // namespace node
+} // namespace libbitcoin
+
+#endif

include/bitcoin/node/protocols/protocol_block_out_70012.hpp

@@ -20,21 +20,21 @@
 #define LIBBITCOIN_NODE_PROTOCOLS_PROTOCOL_BLOCK_OUT_70012_HPP
 
 #include <bitcoin/node/define.hpp>
-#include <bitcoin/node/protocols/protocol_block_out_106.hpp>
+#include <bitcoin/node/protocols/protocol_block_out_70001.hpp>
 
 namespace libbitcoin {
 namespace node {
 
 class BCN_API protocol_block_out_70012
-  : public protocol_block_out_106,
+  : public protocol_block_out_70001,
     protected network::tracker<protocol_block_out_70012>
 {
 public:
     typedef std::shared_ptr<protocol_block_out_70012> ptr;
 
     protocol_block_out_70012(const auto& session,
         const network::channel::ptr& channel) NOEXCEPT
-      : protocol_block_out_106(session, channel),
+      : protocol_block_out_70001(session, channel),
         network::tracker<protocol_block_out_70012>(session->log)
     {
     }

include/bitcoin/node/protocols/protocol_transaction_out_106.hpp

@@ -63,6 +63,11 @@ class BCN_API protocol_transaction_out_106
     virtual void send_transaction(const code& ec, size_t index,
         const network::messages::peer::get_data::cptr& message) NOEXCEPT;
 
+    /// The requested item cannot be served, stops the channel.
+    virtual void handle_unservable(
+        const network::messages::peer::inventory_item& item, size_t index,
+        const network::messages::peer::get_data::cptr& message) NOEXCEPT;
+
     virtual bool announce(const system::hash_digest& hash) NOEXCEPT;
 
 private:

include/bitcoin/node/protocols/protocol_transaction_out_70001.hpp

@@ -0,0 +1,58 @@
+/**
+ * Copyright (c) 2011-2026 libbitcoin developers
+ *
+ * This file is part of libbitcoin.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef LIBBITCOIN_NODE_PROTOCOLS_PROTOCOL_TRANSACTION_OUT_70001_HPP
+#define LIBBITCOIN_NODE_PROTOCOLS_PROTOCOL_TRANSACTION_OUT_70001_HPP
+
+#include <bitcoin/node/define.hpp>
+#include <bitcoin/node/protocols/protocol_transaction_out_106.hpp>
+
+namespace libbitcoin {
+namespace node {
+
+class BCN_API protocol_transaction_out_70001
+  : public protocol_transaction_out_106,
+    protected network::tracker<protocol_transaction_out_70001>
+{
+public:
+    typedef std::shared_ptr<protocol_transaction_out_70001> ptr;
+
+    protocol_transaction_out_70001(const auto& session,
+        const network::channel::ptr& channel) NOEXCEPT
+      : protocol_transaction_out_106(session, channel),
+        enable_not_found_(session->network_settings().enable_not_found),
+        network::tracker<protocol_transaction_out_70001>(session->log)
+    {
+    }
+
+protected:
+    /// The requested item cannot be served, replies not_found.
+    void handle_unservable(
+        const network::messages::peer::inventory_item& item, size_t index,
+        const network::messages::peer::get_data::cptr& message) NOEXCEPT
+        override;
+
+private:
+    // This is thread safe.
+    const bool enable_not_found_;
+};
+
+} // namespace node
+} // namespace libbitcoin
+
+#endif

include/bitcoin/node/protocols/protocols.hpp

@@ -23,6 +23,7 @@
 #include <bitcoin/node/protocols/protocol_block_in_106.hpp>
 #include <bitcoin/node/protocols/protocol_block_in_31800.hpp>
 #include <bitcoin/node/protocols/protocol_block_out_106.hpp>
+#include <bitcoin/node/protocols/protocol_block_out_70001.hpp>
 #include <bitcoin/node/protocols/protocol_block_out_70012.hpp>
 #include <bitcoin/node/protocols/protocol_filter_out_70015.hpp>
 #include <bitcoin/node/protocols/protocol_header_in_31800.hpp>
@@ -34,5 +35,6 @@
 #include <bitcoin/node/protocols/protocol_performer.hpp>
 #include <bitcoin/node/protocols/protocol_transaction_in_106.hpp>
 #include <bitcoin/node/protocols/protocol_transaction_out_106.hpp>
+#include <bitcoin/node/protocols/protocol_transaction_out_70001.hpp>
 
 #endif