diff --git a/external/tox_ngc_ft1/tox_ngc_ft1 b/external/tox_ngc_ft1/tox_ngc_ft1
index 27f4dd7..4c37f0c 160000
--- a/external/tox_ngc_ft1/tox_ngc_ft1
+++ b/external/tox_ngc_ft1/tox_ngc_ft1
@@ -1 +1 @@
-Subproject commit 27f4dd7180be0309aa201cdf2453197ce7acea32
+Subproject commit 4c37f0c32bd22f55756c5adacf37956a9b7dac1e
diff --git a/src/tox_callbacks.cpp b/src/tox_callbacks.cpp
index 86e4576..6ec94ac 100644
--- a/src/tox_callbacks.cpp
+++ b/src/tox_callbacks.cpp
@@ -5,6 +5,8 @@
 #include <string_view>
 #include <iostream>
 
+// TODO: maybe a dispatch table is better?
+
 // logging
 void log_cb(Tox*, TOX_LOG_LEVEL level, const char *file, uint32_t line, const char *func, const char *message, void *user_data) {
 	//ToxClient* client = static_cast<ToxClient*>(user_data);
@@ -43,3 +45,39 @@ void group_self_join_cb(Tox*, uint32_t group_number, void *user_data) {
 	static_cast<ToxClient*>(user_data)->onToxGroupSelfJoin(group_number);
 }
 
+// ==================== sha1_info ====================
+
+void ft1_recv_request_sha1_info_cb(Tox*, uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, void* user_data) {
+	static_cast<ToxClient*>(user_data)->onFT1ReceiveRequestSHA1Info(group_number, peer_number, file_id, file_id_size);
+}
+
+bool ft1_recv_init_sha1_info_cb(Tox*, uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, const uint8_t transfer_id, const size_t file_size, void* user_data) {
+	return static_cast<ToxClient*>(user_data)->onFT1ReceiveInitSHA1Info(group_number, peer_number, file_id, file_id_size, transfer_id, file_size);
+}
+
+void ft1_recv_data_sha1_info_cb(Tox*, uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, const uint8_t* data, size_t data_size, void* user_data) {
+	static_cast<ToxClient*>(user_data)->onFT1ReceiveDataSHA1Info(group_number, peer_number, transfer_id, data_offset, data, data_size);
+}
+
+void ft1_send_data_sha1_info_cb(Tox*, uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size, void* user_data) {
+	static_cast<ToxClient*>(user_data)->onFT1SendDataSHA1Info(group_number, peer_number, transfer_id, data_offset, data, data_size);
+}
+
+// ==================== sha1_chunk ====================
+
+void ft1_recv_request_sha1_chunk_cb(Tox*, uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, void* user_data) {
+	static_cast<ToxClient*>(user_data)->onFT1ReceiveRequestSHA1Chunk(group_number, peer_number, file_id, file_id_size);
+}
+
+bool ft1_recv_init_sha1_chunk_cb(Tox*, uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, const uint8_t transfer_id, const size_t file_size, void* user_data) {
+	return static_cast<ToxClient*>(user_data)->onFT1ReceiveInitSHA1Chunk(group_number, peer_number, file_id, file_id_size, transfer_id, file_size);
+}
+
+void ft1_recv_data_sha1_chunk_cb(Tox*, uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, const uint8_t* data, size_t data_size, void* user_data) {
+	static_cast<ToxClient*>(user_data)->onFT1ReceiveDataSHA1Chunk(group_number, peer_number, transfer_id, data_offset, data, data_size);
+}
+
+void ft1_send_data_sha1_chunk_cb(Tox*, uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size, void* user_data) {
+	static_cast<ToxClient*>(user_data)->onFT1SendDataSHA1Chunk(group_number, peer_number, transfer_id, data_offset, data, data_size);
+}
+
diff --git a/src/tox_callbacks.hpp b/src/tox_callbacks.hpp
index 93838b7..14563e2 100644
--- a/src/tox_callbacks.hpp
+++ b/src/tox_callbacks.hpp
@@ -38,3 +38,17 @@ void group_self_join_cb(Tox *tox, uint32_t group_number, void *user_data);
 //static void group_join_fail_cb(Tox *tox, uint32_t group_number, Tox_Group_Join_Fail fail_type, void *user_data);
 //static void group_moderation_cb(Tox *tox, uint32_t group_number, uint32_t source_peer_id, uint32_t target_peer_id, Tox_Group_Mod_Event mod_type, void *user_data);
 
+// ft1
+
+// sha1_info
+void ft1_recv_request_sha1_info_cb(Tox *tox, uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, void* user_data);
+bool ft1_recv_init_sha1_info_cb(Tox *tox, uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, const uint8_t transfer_id, const size_t file_size, void* user_data);
+void ft1_recv_data_sha1_info_cb(Tox *tox, uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, const uint8_t* data, size_t data_size, void* user_data);
+void ft1_send_data_sha1_info_cb(Tox *tox, uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size, void* user_data);
+
+// sha1_chunk
+void ft1_recv_request_sha1_chunk_cb(Tox *tox, uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, void* user_data);
+bool ft1_recv_init_sha1_chunk_cb(Tox *tox, uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, const uint8_t transfer_id, const size_t file_size, void* user_data);
+void ft1_recv_data_sha1_chunk_cb(Tox *tox, uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, const uint8_t* data, size_t data_size, void* user_data);
+void ft1_send_data_sha1_chunk_cb(Tox *tox, uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size, void* user_data);
+
diff --git a/src/tox_client.cpp b/src/tox_client.cpp
index 58e6f95..c4bf33d 100644
--- a/src/tox_client.cpp
+++ b/src/tox_client.cpp
@@ -65,8 +65,8 @@ ToxClient::ToxClient(const CommandLine& cl) :
 		throw std::runtime_error{"tox failed"};
 	}
 
-#define CALLBACK_REG(x) tox_callback_##x(_tox, x##_cb)
-	CALLBACK_REG(self_connection_status);
+#define TOX_CALLBACK_REG(x) tox_callback_##x(_tox, x##_cb)
+	TOX_CALLBACK_REG(self_connection_status);
 
 	//CALLBACK_REG(friend_name);
 	//CALLBACK_REG(friend_status_message);
@@ -74,7 +74,7 @@ ToxClient::ToxClient(const CommandLine& cl) :
 	//CALLBACK_REG(friend_connection_status);
 	//CALLBACK_REG(friend_typing);
 	//CALLBACK_REG(friend_read_receipt);
-	CALLBACK_REG(friend_request);
+	TOX_CALLBACK_REG(friend_request);
 	//CALLBACK_REG(friend_message);
 
 	//CALLBACK_REG(file_recv_control);
@@ -92,10 +92,13 @@ ToxClient::ToxClient(const CommandLine& cl) :
 	//CALLBACK_REG(friend_lossy_packet);
 	//CALLBACK_REG(friend_lossless_packet);
 
-	CALLBACK_REG(group_custom_packet);
-	CALLBACK_REG(group_custom_private_packet);
-	CALLBACK_REG(group_invite);
-#undef CALLBACK_REG
+	TOX_CALLBACK_REG(group_custom_packet);
+	TOX_CALLBACK_REG(group_custom_private_packet);
+	TOX_CALLBACK_REG(group_invite);
+	TOX_CALLBACK_REG(group_peer_join);
+	TOX_CALLBACK_REG(group_peer_exit);
+	TOX_CALLBACK_REG(group_self_join);
+#undef TOX_CALLBACK_REG
 
 	if (_self_name.empty()) {
 		_self_name = "tox_ngc_ft1_tool";
@@ -108,6 +111,18 @@ ToxClient::ToxClient(const CommandLine& cl) :
 	_ft1_ctx = NGC_FT1_new(&ft1_options);
 	NGC_FT1_register_ext(_ft1_ctx, _ext_ctx);
 
+	// sha1_info
+	NGC_FT1_register_callback_recv_request(_ft1_ctx, NGC_FT1_file_kind::HASH_SHA1_INFO, ft1_recv_request_sha1_info_cb, this);
+	NGC_FT1_register_callback_recv_init(_ft1_ctx, NGC_FT1_file_kind::HASH_SHA1_INFO, ft1_recv_init_sha1_info_cb, this);
+	NGC_FT1_register_callback_recv_data(_ft1_ctx, NGC_FT1_file_kind::HASH_SHA1_INFO, ft1_recv_data_sha1_info_cb, this);
+	NGC_FT1_register_callback_send_data(_ft1_ctx, NGC_FT1_file_kind::HASH_SHA1_INFO, ft1_send_data_sha1_info_cb, this);
+
+	// sha1_chunk
+	NGC_FT1_register_callback_recv_request(_ft1_ctx, NGC_FT1_file_kind::HASH_SHA1_CHUNK, ft1_recv_request_sha1_chunk_cb, this);
+	NGC_FT1_register_callback_recv_init(_ft1_ctx, NGC_FT1_file_kind::HASH_SHA1_CHUNK, ft1_recv_init_sha1_chunk_cb, this);
+	NGC_FT1_register_callback_recv_data(_ft1_ctx, NGC_FT1_file_kind::HASH_SHA1_CHUNK, ft1_recv_data_sha1_chunk_cb, this);
+	NGC_FT1_register_callback_send_data(_ft1_ctx, NGC_FT1_file_kind::HASH_SHA1_CHUNK, ft1_send_data_sha1_chunk_cb, this);
+
 	// dht bootstrap
 	{
 		struct DHT_node {
@@ -215,6 +230,34 @@ void ToxClient::onToxGroupSelfJoin(uint32_t group_number) {
 	_tox_profile_dirty = true;
 }
 
+// sha1_info
+void ToxClient::onFT1ReceiveRequestSHA1Info(uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size) {
+}
+
+bool ToxClient::onFT1ReceiveInitSHA1Info(uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, const uint8_t transfer_id, const size_t file_size) {
+	return false; // deny
+}
+
+void ToxClient::onFT1ReceiveDataSHA1Info(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, const uint8_t* data, size_t data_size) {
+}
+
+void ToxClient::onFT1SendDataSHA1Info(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size) {
+}
+
+// sha1_chunk
+void ToxClient::onFT1ReceiveRequestSHA1Chunk(uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size) {
+}
+
+bool ToxClient::onFT1ReceiveInitSHA1Chunk(uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, const uint8_t transfer_id, const size_t file_size) {
+	return false; // deny
+}
+
+void ToxClient::onFT1ReceiveDataSHA1Chunk(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, const uint8_t* data, size_t data_size) {
+}
+
+void ToxClient::onFT1SendDataSHA1Chunk(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size) {
+}
+
 void ToxClient::saveToxProfile(void) {
 	if (_tox_profile_path.empty()) {
 		return;
diff --git a/src/tox_client.hpp b/src/tox_client.hpp
index f4fac02..771a323 100644
--- a/src/tox_client.hpp
+++ b/src/tox_client.hpp
@@ -30,6 +30,19 @@ struct ToxClient {
 		void onToxGroupPeerExit(uint32_t group_number, uint32_t peer_id, Tox_Group_Exit_Type exit_type, std::string_view name, std::string_view part_message);
 		void onToxGroupSelfJoin(uint32_t group_number);
 
+	public: // FT1 callbacks
+		// sha1_info
+		void onFT1ReceiveRequestSHA1Info(uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size);
+		bool onFT1ReceiveInitSHA1Info(uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, const uint8_t transfer_id, const size_t file_size);
+		void onFT1ReceiveDataSHA1Info(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, const uint8_t* data, size_t data_size);
+		void onFT1SendDataSHA1Info(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size);
+
+		// sha1_chunk
+		void onFT1ReceiveRequestSHA1Chunk(uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size);
+		bool onFT1ReceiveInitSHA1Chunk(uint32_t group_number, uint32_t peer_number, const uint8_t* file_id, size_t file_id_size, const uint8_t transfer_id, const size_t file_size);
+		void onFT1ReceiveDataSHA1Chunk(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, const uint8_t* data, size_t data_size);
+		void onFT1SendDataSHA1Chunk(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size);
+
 	private:
 		void saveToxProfile(void);