diff --git a/solanaceae/tox_contacts/components.hpp b/solanaceae/tox_contacts/components.hpp
index d46cf82..f1590e5 100644
--- a/solanaceae/tox_contacts/components.hpp
+++ b/solanaceae/tox_contacts/components.hpp
@@ -4,9 +4,9 @@
 
 namespace Contact::Components {
 
-	// ==========
-	// friend
-	// ==========
+	// ====================
+	// friends
+	// ====================
 
 	struct ToxFriendPersistent {
 		ToxKey key;
@@ -17,9 +17,9 @@ namespace Contact::Components {
 	};
 
 
-	// ==========
-	// TODO: conference (old groups)
-	// ==========
+	// ====================
+	// TODO: conferences (old groups)
+	// ====================
 
 	struct ToxConfPersistent {
 		ToxKey key;
@@ -30,9 +30,9 @@ namespace Contact::Components {
 	};
 
 
-	// ==========
+	// ====================
 	// groups (ngc)
-	// ==========
+	// ====================
 
 	struct ToxGroupPersistent {
 		ToxKey chat_id;
@@ -43,7 +43,6 @@ namespace Contact::Components {
 	};
 
 	struct ToxGroupIncomingRequest {
-		//Contact3 friend_c;
 		uint32_t friend_number;
 		std::vector<uint8_t> invite_data;
 	};
diff --git a/solanaceae/tox_contacts/tox_contact_model2.cpp b/solanaceae/tox_contacts/tox_contact_model2.cpp
index 41dc354..c1d46a4 100644
--- a/solanaceae/tox_contacts/tox_contact_model2.cpp
+++ b/solanaceae/tox_contacts/tox_contact_model2.cpp
@@ -4,6 +4,7 @@
 
 #include <solanaceae/toxcore/tox_interface.hpp>
 #include <solanaceae/contact/components.hpp>
+#include <solanaceae/contact/contact_store_i.hpp>
 
 // TODO: move
 #include <solanaceae/message3/contact_components.hpp>
@@ -16,7 +17,7 @@
 #include <string_view>
 #include <iostream>
 
-ToxContactModel2::ToxContactModel2(Contact3Registry& cr, ToxI& t, ToxEventProviderI& tep) : _cr(cr), _t(t), _tep_sr(tep.newSubRef(this)) {
+ToxContactModel2::ToxContactModel2(ContactStore4I& cs, ToxI& t, ToxEventProviderI& tep) : _cs(cs), _t(t), _tep_sr(tep.newSubRef(this)) {
 	_tep_sr
 		.subscribe(Tox_Event_Type::TOX_EVENT_FRIEND_CONNECTION_STATUS)
 		.subscribe(Tox_Event_Type::TOX_EVENT_FRIEND_STATUS)
@@ -34,19 +35,23 @@ ToxContactModel2::ToxContactModel2(Contact3Registry& cr, ToxI& t, ToxEventProvid
 		.subscribe(Tox_Event_Type::TOX_EVENT_GROUP_TOPIC)
 	;
 
+	auto& cr = _cs.registry();
+
 	// add tox profile root
-	_root = _cr.create();
-	_cr.emplace<Contact::Components::TagRoot>(_root);
-	_cr.emplace<Contact::Components::ContactModel>(_root, this);
+	_root = cr.create();
+	cr.emplace<Contact::Components::TagRoot>(_root);
+	cr.emplace<Contact::Components::ContactModel>(_root, this);
+	cs.throwEventConstruct(_root);
 
 	// add self
-	_friend_self = _cr.create();
-	_cr.emplace<Contact::Components::ContactModel>(_friend_self, this);
-	_cr.emplace<Contact::Components::Parent>(_friend_self, _root);
-	_cr.emplace<Contact::Components::TagSelfStrong>(_friend_self);
-	_cr.emplace<Contact::Components::Name>(_friend_self, _t.toxSelfGetName());
+	_friend_self = cr.create();
+	cr.emplace<Contact::Components::ContactModel>(_friend_self, this);
+	cr.emplace<Contact::Components::Parent>(_friend_self, _root);
+	cr.emplace<Contact::Components::TagSelfStrong>(_friend_self);
+	cr.emplace<Contact::Components::Name>(_friend_self, _t.toxSelfGetName());
 	// TODO: can contact with id preexist here?
-	_cr.emplace<Contact::Components::ID>(_friend_self, _t.toxSelfGetPublicKey());
+	cr.emplace<Contact::Components::ID>(_friend_self, _t.toxSelfGetPublicKey());
+	cs.throwEventConstruct(_friend_self);
 
 	// fill in contacts
 	for (const uint32_t f_id : _t.toxSelfGetFriendList()) {
@@ -68,76 +73,121 @@ void ToxContactModel2::iterate(float delta) {
 	if (_group_status_timer >= 1.f) {
 		_group_status_timer = 0.f;
 
-		_cr.view<Contact::Components::ToxGroupPeerEphemeral, Contact::Components::ConnectionState>().each([this](auto c, const auto& tox_peer, auto& con) {
+		std::vector<Contact4> updated;
+
+		_cs.registry().view<Contact::Components::ToxGroupPeerEphemeral, Contact::Components::ConnectionState>().each([this, &updated](auto c, const auto& tox_peer, auto& con) {
 			auto state_opt = std::get<0>(_t.toxGroupPeerGetConnectionStatus(tox_peer.group_number, tox_peer.peer_number));
-			if (state_opt.has_value()) {
-				if (state_opt.value() == TOX_CONNECTION_UDP) {
-					con.state = Contact::Components::ConnectionState::State::direct;
-				} else if (state_opt.value() == TOX_CONNECTION_TCP) {
-					con.state = Contact::Components::ConnectionState::State::cloud;
-				}
+			if (!state_opt.has_value()) {
+				return;
 			}
+
+			Contact::Components::ConnectionState::State new_state{Contact::Components::ConnectionState::State::disconnected};
+			if (state_opt.value() == TOX_CONNECTION_UDP) {
+				new_state = Contact::Components::ConnectionState::State::direct;
+			} else if (state_opt.value() == TOX_CONNECTION_TCP) {
+				new_state = Contact::Components::ConnectionState::State::cloud;
+			}
+
+			if (con.state != new_state) {
+				updated.push_back(c);
+			}
+
+			con.state = new_state;
 		});
+
+		for (const auto c : updated) {
+			_cs.throwEventUpdate(c);
+		}
 	}
 }
 
-void ToxContactModel2::acceptRequest(Contact3 c, std::string_view self_name, std::string_view password) {
-	assert(!_cr.any_of<Contact::Components::ToxFriendEphemeral>(c));
-	assert(_cr.all_of<Contact::Components::RequestIncoming>(c));
+bool ToxContactModel2::addContact(Contact4 c) {
+	// TODO: implement me
+	return false;
+}
 
-	if (_cr.all_of<Contact::Components::ToxFriendPersistent>(c)) {
-		const auto& key = _cr.get<Contact::Components::ToxFriendPersistent>(c).key.data;
+bool ToxContactModel2::acceptRequest(Contact4 c, std::string_view self_name, std::string_view password) {
+	auto& cr = _cs.registry();
+
+	if (
+		cr.any_of<Contact::Components::ToxFriendEphemeral>(c) ||
+		!cr.all_of<Contact::Components::RequestIncoming>(c)
+	) {
+		return false;
+	}
+
+	assert(!cr.any_of<Contact::Components::ToxFriendEphemeral>(c));
+	assert(cr.all_of<Contact::Components::RequestIncoming>(c));
+
+	if (cr.all_of<Contact::Components::ToxFriendPersistent>(c)) {
+		const auto& key = cr.get<Contact::Components::ToxFriendPersistent>(c).key.data;
 		auto [friend_number_opt, _] = _t.toxFriendAddNorequest({key.cbegin(), key.cend()});
 		if (friend_number_opt.has_value()) {
-			_cr.emplace<Contact::Components::ToxFriendEphemeral>(c, friend_number_opt.value());
-			_cr.remove<Contact::Components::RequestIncoming>(c);
+			cr.emplace<Contact::Components::ToxFriendEphemeral>(c, friend_number_opt.value());
+			cr.remove<Contact::Components::RequestIncoming>(c);
 		} else {
 			std::cerr << "TCM2 error: failed to accept friend request/invite\n";
+			return false;
 		}
 	} else if (false) { // conf
-	} else if (_cr.all_of<Contact::Components::ToxGroupIncomingRequest>(c)) { // group
-		const auto& ir = _cr.get<Contact::Components::ToxGroupIncomingRequest>(c);
+	} else if (cr.all_of<Contact::Components::ToxGroupIncomingRequest>(c)) { // group
+		const auto& ir = cr.get<Contact::Components::ToxGroupIncomingRequest>(c);
 		auto [group_number_opt, _] = _t.toxGroupInviteAccept(ir.friend_number, ir.invite_data, self_name, password);
-		if (group_number_opt.has_value()) {
-			_cr.emplace<Contact::Components::ToxGroupEphemeral>(c, group_number_opt.value());
-
-			if (auto group_chatid_opt = _t.toxGroupGetChatId(group_number_opt.value()); group_chatid_opt.has_value()) {
-				_cr.emplace_or_replace<Contact::Components::ToxGroupPersistent>(c, group_chatid_opt.value());
-			} else {
-				std::cerr << "TCM2 error: getting chatid for group" << group_number_opt.value() << "!!\n";
-			}
-
-			if (auto self_opt = _t.toxGroupSelfGetPeerId(group_number_opt.value()); self_opt.has_value()) {
-				_cr.emplace_or_replace<Contact::Components::Self>(c, getContactGroupPeer(group_number_opt.value(), self_opt.value()));
-			} else {
-				std::cerr << "TCM2 error: getting self for group" << group_number_opt.value() << "!!\n";
-			}
-
-			_cr.remove<Contact::Components::ToxGroupIncomingRequest>(c);
-			_cr.remove<Contact::Components::RequestIncoming>(c);
-		} else {
+		if (!group_number_opt.has_value()) {
 			std::cerr << "TCM2 error: failed to accept group request/invite\n";
+			return false;
 		}
+
+		// FIXME: we are changing the contact there without event, do we just not?
+		cr.emplace<Contact::Components::ToxGroupEphemeral>(c, group_number_opt.value());
+
+		if (auto group_chatid_opt = _t.toxGroupGetChatId(group_number_opt.value()); group_chatid_opt.has_value()) {
+			cr.emplace_or_replace<Contact::Components::ToxGroupPersistent>(c, group_chatid_opt.value());
+		} else {
+			std::cerr << "TCM2 error: getting chatid for group" << group_number_opt.value() << "!!\n";
+			return false;
+		}
+
+		if (auto self_opt = _t.toxGroupSelfGetPeerId(group_number_opt.value()); self_opt.has_value()) {
+			cr.emplace_or_replace<Contact::Components::Self>(c, getContactGroupPeer(group_number_opt.value(), self_opt.value()));
+		} else {
+			std::cerr << "TCM2 error: getting self for group" << group_number_opt.value() << "!!\n";
+			return false;
+		}
+
+		cr.remove<Contact::Components::ToxGroupIncomingRequest>(c);
+		cr.remove<Contact::Components::RequestIncoming>(c);
 	} else {
 		std::cerr << "TCM2 error: failed to accept request (unk)\n";
+		return false;
 	}
+
+	_cs.throwEventUpdate(c);
+
+	return true;
 }
 
-Contact3Handle ToxContactModel2::getContactFriend(uint32_t friend_number) {
-	Contact3 c = entt::null;
+bool ToxContactModel2::leave(Contact4 c, std::string_view reason) {
+	// TODO: implement me
+	return false;
+}
+
+ContactHandle4 ToxContactModel2::getContactFriend(uint32_t friend_number) {
+	auto& cr = _cs.registry();
+	Contact4 c {entt::null};
 
 	// first check contacts with friend id
 	// TODO: lookup table
 	//_cr.view<Contact::Components::ToxFriendEphemeral>().each([&c, friend_number](const Contact3 e, const Contact::Components::ToxFriendEphemeral& f_id) {
-	for (const auto e : _cr.view<Contact::Components::ToxFriendEphemeral>()) {
-		if (_cr.get<Contact::Components::ToxFriendEphemeral>(e).friend_number == friend_number) {
+	for (const auto e : cr.view<Contact::Components::ToxFriendEphemeral>()) {
+		if (cr.get<Contact::Components::ToxFriendEphemeral>(e).friend_number == friend_number) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
-		return {_cr, c};
+	if (cr.valid(c)) {
+		return {cr, c};
 	}
 
 	// else check by pubkey
@@ -146,89 +196,94 @@ Contact3Handle ToxContactModel2::getContactFriend(uint32_t friend_number) {
 
 	const ToxKey& f_key = f_key_opt.value();
 	//_cr.view<Contact::Components::ToxFriendPersistent>().each([&c, &f_key](const Contact3 e, const Contact::Components::ToxFriendPersistent& f_key_comp) {
-	for (const auto e : _cr.view<Contact::Components::ToxFriendPersistent>()) {
-		if (f_key == _cr.get<Contact::Components::ToxFriendPersistent>(e).key) {
+	for (const auto e : cr.view<Contact::Components::ToxFriendPersistent>()) {
+		if (f_key == cr.get<Contact::Components::ToxFriendPersistent>(e).key) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
+	if (cr.valid(c)) {
 		// param friend number matches pubkey in db, add
-		_cr.emplace_or_replace<Contact::Components::ToxFriendEphemeral>(c, friend_number);
+		cr.emplace_or_replace<Contact::Components::ToxFriendEphemeral>(c, friend_number);
 
-		return {_cr, c};
+		_cs.throwEventUpdate(c);
+		return {cr, c};
 	}
 
 	// check for id (empty contact) and merge
-	for (const auto e : _cr.view<Contact::Components::ID>()) {
-		if (f_key_opt.value() == _cr.get<Contact::Components::ID>(e).data) {
-			c = e;
-			break;
-		}
-	}
+	c = _cs.getOneContactByID(_root, ByteSpan{f_key_opt.value()});
 
-	if (!_cr.valid(c)) {
+	bool created {false};
+	if (!cr.valid(c)) {
 		// else, new ent
-		c = _cr.create();
-		_cr.emplace<Contact::Components::ID>(c, f_key_opt.value());
+		c = cr.create();
+		created = true;
+		cr.emplace<Contact::Components::ID>(c, f_key_opt.value());
 	}
 
-	_cr.emplace_or_replace<Contact::Components::TagBig>(c);
-	_cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
-	_cr.emplace_or_replace<Contact::Components::ToxFriendEphemeral>(c, friend_number);
-	_cr.emplace_or_replace<Contact::Components::ToxFriendPersistent>(c, f_key);
-	_cr.emplace_or_replace<Contact::Components::Parent>(c, _root);
-	_cr.get_or_emplace<Contact::Components::ParentOf>(_root).subs.push_back(c);
-	_cr.emplace_or_replace<Contact::Components::ParentOf>(c).subs.assign({_friend_self, c});
-	_cr.emplace_or_replace<Contact::Components::TagPrivate>(c);
-	_cr.emplace_or_replace<Contact::Components::Self>(c, _friend_self);
-	_cr.emplace_or_replace<Contact::Components::Name>(c, _t.toxFriendGetName(friend_number).value_or("<unk>"));
-	_cr.emplace_or_replace<Contact::Components::StatusText>(c, _t.toxFriendGetStatusMessage(friend_number).value_or("")).fillFirstLineLength();
+	cr.emplace_or_replace<Contact::Components::TagBig>(c);
+	cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
+	cr.emplace_or_replace<Contact::Components::ToxFriendEphemeral>(c, friend_number);
+	cr.emplace_or_replace<Contact::Components::ToxFriendPersistent>(c, f_key);
+	cr.emplace_or_replace<Contact::Components::Parent>(c, _root);
+	cr.get_or_emplace<Contact::Components::ParentOf>(_root).subs.push_back(c);
+	cr.emplace_or_replace<Contact::Components::ParentOf>(c).subs.assign({_friend_self, c});
+	cr.emplace_or_replace<Contact::Components::TagPrivate>(c);
+	cr.emplace_or_replace<Contact::Components::Self>(c, _friend_self);
+	cr.emplace_or_replace<Contact::Components::Name>(c, _t.toxFriendGetName(friend_number).value_or("<unk>"));
+	cr.emplace_or_replace<Contact::Components::StatusText>(c, _t.toxFriendGetStatusMessage(friend_number).value_or("")).fillFirstLineLength();
 
 	const auto ts = getTimeMS();
 
-	if (!_cr.all_of<Contact::Components::LastSeen>(c)) {
+	if (!cr.all_of<Contact::Components::LastSeen>(c)) {
 		auto lo_opt = _t.toxFriendGetLastOnline(friend_number);
 		if (lo_opt.has_value()) {
-			_cr.emplace_or_replace<Contact::Components::LastSeen>(c, lo_opt.value()*1000ull);
+			cr.emplace_or_replace<Contact::Components::LastSeen>(c, lo_opt.value()*1000ull);
 		}
 	}
 
-	if (!_cr.all_of<Contact::Components::FirstSeen>(c)) {
-		if (_cr.all_of<Contact::Components::LastSeen>(c)) {
-			_cr.emplace_or_replace<Contact::Components::FirstSeen>(c,
+	if (!cr.all_of<Contact::Components::FirstSeen>(c)) {
+		if (cr.all_of<Contact::Components::LastSeen>(c)) {
+			cr.emplace_or_replace<Contact::Components::FirstSeen>(c,
 				std::min(
-					_cr.get<Contact::Components::LastSeen>(c).ts,
+					cr.get<Contact::Components::LastSeen>(c).ts,
 					ts
 				)
 			);
 		} else {
 			// TODO: did we?
-			_cr.emplace_or_replace<Contact::Components::FirstSeen>(c, ts);
+			cr.emplace_or_replace<Contact::Components::FirstSeen>(c, ts);
 		}
 	}
 
 	std::cout << "TCM2: created friend contact " << friend_number << "\n";
 
-	return {_cr, c};
+	if (created) {
+		_cs.throwEventConstruct(c);
+	} else {
+		_cs.throwEventUpdate(c);
+	}
+
+	return {cr, c};
 }
 
-Contact3Handle ToxContactModel2::getContactGroup(uint32_t group_number) {
-	Contact3 c = entt::null;
+ContactHandle4 ToxContactModel2::getContactGroup(uint32_t group_number) {
+	auto& cr = _cs.registry();
+	Contact4 c = entt::null;
 
 	// first check contacts with group_number
 	// TODO: lookup table
 	//_cr.view<Contact::Components::ToxGroupEphemeral>().each([&c, group_number](const Contact3 e, const Contact::Components::ToxGroupEphemeral& g_e) {
-	for (const auto e : _cr.view<Contact::Components::ToxGroupEphemeral>()) {
-		if (_cr.get<Contact::Components::ToxGroupEphemeral>(e).group_number == group_number) {
+	for (const auto e : cr.view<Contact::Components::ToxGroupEphemeral>()) {
+		if (cr.get<Contact::Components::ToxGroupEphemeral>(e).group_number == group_number) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
-		return {_cr, c};
+	if (cr.valid(c)) {
+		return {cr, c};
 	}
 
 	// else check by pubkey
@@ -237,45 +292,43 @@ Contact3Handle ToxContactModel2::getContactGroup(uint32_t group_number) {
 
 	const ToxKey& g_key = g_key_opt.value();
 	//_cr.view<Contact::Components::ToxGroupPersistent>().each([&c, &g_key](const Contact3 e, const Contact::Components::ToxGroupPersistent& g_key_comp) {
-	for (const auto e : _cr.view<Contact::Components::ToxGroupPersistent>()) {
-		if (g_key == _cr.get<Contact::Components::ToxGroupPersistent>(e).chat_id) {
+	for (const auto e : cr.view<Contact::Components::ToxGroupPersistent>()) {
+		if (g_key == cr.get<Contact::Components::ToxGroupPersistent>(e).chat_id) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
+	if (cr.valid(c)) {
 		// param group number matches pubkey in db, add
-		_cr.emplace_or_replace<Contact::Components::ToxGroupEphemeral>(c, group_number);
+		cr.emplace_or_replace<Contact::Components::ToxGroupEphemeral>(c, group_number);
 
-		return {_cr, c};
+		_cs.throwEventUpdate(c);
+		return {cr, c};
 	}
 
 	// check for id (empty contact) and merge
-	for (const auto e : _cr.view<Contact::Components::ID>()) {
-		if (g_key_opt.value() == _cr.get<Contact::Components::ID>(e).data) {
-			c = e;
-			break;
-		}
-	}
+	c = _cs.getOneContactByID(_root, ByteSpan{g_key_opt.value()});
 
-	if (!_cr.valid(c)) {
+	bool created{false};
+	if (!cr.valid(c)) {
 		// else, new ent
-		c = _cr.create();
-		_cr.emplace<Contact::Components::ID>(c, g_key_opt.value());
+		c = cr.create();
+		created = true;
+		cr.emplace<Contact::Components::ID>(c, g_key_opt.value());
 	}
 
-	_cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
-	_cr.emplace_or_replace<Contact::Components::TagBig>(c);
-	_cr.emplace_or_replace<Contact::Components::Parent>(c, _root);
-	_cr.get_or_emplace<Contact::Components::ParentOf>(_root).subs.push_back(c);
-	_cr.emplace_or_replace<Contact::Components::ParentOf>(c); // start empty
-	_cr.emplace_or_replace<Contact::Components::ToxGroupEphemeral>(c, group_number);
-	_cr.emplace_or_replace<Contact::Components::ToxGroupPersistent>(c, g_key);
-	_cr.emplace_or_replace<Contact::Components::TagGroup>(c);
-	_cr.emplace_or_replace<Contact::Components::Name>(c, _t.toxGroupGetName(group_number).value_or("<unk>"));
-	_cr.emplace_or_replace<Contact::Components::StatusText>(c, _t.toxGroupGetTopic(group_number).value_or("")).fillFirstLineLength();
-	_cr.emplace_or_replace<Contact::Components::ConnectionState>(
+	cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
+	cr.emplace_or_replace<Contact::Components::TagBig>(c);
+	cr.emplace_or_replace<Contact::Components::Parent>(c, _root);
+	cr.get_or_emplace<Contact::Components::ParentOf>(_root).subs.push_back(c);
+	cr.emplace_or_replace<Contact::Components::ParentOf>(c); // start empty
+	cr.emplace_or_replace<Contact::Components::ToxGroupEphemeral>(c, group_number);
+	cr.emplace_or_replace<Contact::Components::ToxGroupPersistent>(c, g_key);
+	cr.emplace_or_replace<Contact::Components::TagGroup>(c);
+	cr.emplace_or_replace<Contact::Components::Name>(c, _t.toxGroupGetName(group_number).value_or("<unk>"));
+	cr.emplace_or_replace<Contact::Components::StatusText>(c, _t.toxGroupGetTopic(group_number).value_or("")).fillFirstLineLength();
+	cr.emplace_or_replace<Contact::Components::ConnectionState>(
 		c,
 		_t.toxGroupIsConnected(group_number).value_or(false)
 			? Contact::Components::ConnectionState::State::cloud
@@ -283,7 +336,7 @@ Contact3Handle ToxContactModel2::getContactGroup(uint32_t group_number) {
 	);
 
 	// TODO: remove and add OnNewContact
-	_cr.emplace_or_replace<Contact::Components::MessageIsSame>(c,
+	cr.emplace_or_replace<Contact::Components::MessageIsSame>(c,
 		[](Message3Handle lh, Message3Handle rh) -> bool {
 			if (!lh.all_of<Message::Components::ToxGroupMessageID>() || !rh.all_of<Message::Components::ToxGroupMessageID>()) {
 				return false; // cant compare
@@ -312,37 +365,45 @@ Contact3Handle ToxContactModel2::getContactGroup(uint32_t group_number) {
 		}
 	);
 
+	// TODO: move after event? throw first if create?
 	auto self_opt = _t.toxGroupSelfGetPeerId(group_number);
 	if (self_opt.has_value()) {
-		_cr.emplace_or_replace<Contact::Components::Self>(c, getContactGroupPeer(group_number, self_opt.value()));
+		cr.emplace_or_replace<Contact::Components::Self>(c, getContactGroupPeer(group_number, self_opt.value()));
 	} else {
 		std::cerr << "TCM2 error: getting self for group" << group_number << "!!\n";
 	}
 
 	std::cout << "TCM2: created group contact " << group_number << "\n";
 
-	return {_cr, c};
+	if (created) {
+		_cs.throwEventConstruct(c);
+	} else {
+		_cs.throwEventUpdate(c);
+	}
+
+	return {cr, c};
 }
 
-Contact3Handle ToxContactModel2::getContactGroupPeer(uint32_t group_number, uint32_t peer_number) {
-	Contact3 c = entt::null;
+ContactHandle4 ToxContactModel2::getContactGroupPeer(uint32_t group_number, uint32_t peer_number) {
+	auto& cr = _cs.registry();
+	Contact4 c{entt::null};
 
-	Contact3Handle group_c = getContactGroup(group_number);
+	ContactHandle4 group_c = getContactGroup(group_number);
 
 	assert(static_cast<bool>(group_c));
 
 	// first check contacts with peer id
 	// TODO: lookup table
-	for (const auto e : _cr.view<Contact::Components::ToxGroupPeerEphemeral>()) {
-		const auto& p_comp = _cr.get<Contact::Components::ToxGroupPeerEphemeral>(e);
+	for (const auto e : cr.view<Contact::Components::ToxGroupPeerEphemeral>()) {
+		const auto& p_comp = cr.get<Contact::Components::ToxGroupPeerEphemeral>(e);
 		if (p_comp.group_number == group_number && p_comp.peer_number == peer_number) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
-		return {_cr, c};
+	if (cr.valid(c)) {
+		return {cr, c};
 	}
 
 	const auto& g_key = group_c.get<Contact::Components::ToxGroupPersistent>().chat_id;
@@ -357,74 +418,83 @@ Contact3Handle ToxContactModel2::getContactGroupPeer(uint32_t group_number, uint
 	}
 
 	const ToxKey& g_p_key = g_p_key_opt.value();
-	for (const auto e : _cr.view<Contact::Components::ToxGroupPeerPersistent>()) {
-		const auto& g_p_key_comp = _cr.get<Contact::Components::ToxGroupPeerPersistent>(e);
+	for (const auto e : cr.view<Contact::Components::ToxGroupPeerPersistent>()) {
+		const auto& g_p_key_comp = cr.get<Contact::Components::ToxGroupPeerPersistent>(e);
 		if (g_p_key == g_p_key_comp.peer_key && g_key == g_p_key_comp.chat_id) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
+	if (cr.valid(c)) {
 		// param numbers matches pubkey in db, add
-		_cr.emplace_or_replace<Contact::Components::ToxGroupPeerEphemeral>(c, group_number, peer_number);
+		cr.emplace_or_replace<Contact::Components::ToxGroupPeerEphemeral>(c, group_number, peer_number);
 
-		return {_cr, c};
+		_cs.throwEventUpdate(c);
+		return {cr, c};
 	}
 
 	// check for id (empty contact) and merge
-	for (const auto e : _cr.view<Contact::Components::ID>()) {
-		if (g_p_key_opt.value() == _cr.get<Contact::Components::ID>(e).data) {
-			c = e;
-			break;
-		}
-	}
+	//c = _cs.getOneContactByID(_root, ByteSpan{g_p_key_opt.value()});
+	// technically it should be possible to have multiple contacts with the same ID in the same tox profile
+	// since ngcs have their own ids, and someone might have copied the keys and uses them in multiple
+	c = _cs.getOneContactByID(group_c, ByteSpan{g_p_key_opt.value()});
 
-	if (!_cr.valid(c)) {
+	bool created{false};
+	if (!cr.valid(c)) {
 		// else, new ent
-		c = _cr.create();
-		_cr.emplace<Contact::Components::ID>(c, g_p_key_opt.value());
+		c = cr.create();
+		created = true;
+		cr.emplace<Contact::Components::ID>(c, g_p_key_opt.value());
 	}
 
-	_cr.emplace_or_replace<Contact::Components::Parent>(c, group_c);
+	cr.emplace_or_replace<Contact::Components::Parent>(c, group_c);
 	{ // add sub to parent
 		auto& parent_sub_list = group_c.get_or_emplace<Contact::Components::ParentOf>().subs;
 		if (std::find(parent_sub_list.cbegin(), parent_sub_list.cend(), c) == parent_sub_list.cend()) {
 			parent_sub_list.push_back(c);
 		}
 	}
-	_cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
-	_cr.emplace_or_replace<Contact::Components::ToxGroupPeerEphemeral>(c, group_number, peer_number);
-	_cr.emplace_or_replace<Contact::Components::ToxGroupPeerPersistent>(c, g_key, g_p_key);
-	_cr.emplace_or_replace<Contact::Components::TagPrivate>(c);
+	cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
+	cr.emplace_or_replace<Contact::Components::ToxGroupPeerEphemeral>(c, group_number, peer_number);
+	cr.emplace_or_replace<Contact::Components::ToxGroupPeerPersistent>(c, g_key, g_p_key);
+	cr.emplace_or_replace<Contact::Components::TagPrivate>(c);
 	const auto name_opt = std::get<0>(_t.toxGroupPeerGetName(group_number, peer_number));
 	if (name_opt.has_value()) {
-		_cr.emplace_or_replace<Contact::Components::Name>(c, name_opt.value());
+		cr.emplace_or_replace<Contact::Components::Name>(c, name_opt.value());
 	}
 
 	{ // self
-		// TODO: this is very flaky
+		// TODO: this is very flaky <- what did i mean with this
+		// since we have the group contact, self is likely working
 		auto self_number_opt = _t.toxGroupSelfGetPeerId(group_number);
-		if (peer_number == self_number_opt.value()) {
-			_cr.emplace_or_replace<Contact::Components::TagSelfStrong>(c);
+		if (self_number_opt.has_value()) {
+			if (peer_number == self_number_opt.value()) {
+				cr.emplace_or_replace<Contact::Components::TagSelfStrong>(c);
+			} else {
+				cr.emplace_or_replace<Contact::Components::Self>(c, getContactGroupPeer(group_number, self_number_opt.value()));
+			}
 		} else {
-			_cr.emplace_or_replace<Contact::Components::Self>(c, getContactGroupPeer(group_number, self_number_opt.value()));
+			std::cerr << "TCM2 error: getting self for group" << group_number << "!!\n";
 		}
 	}
 
 	std::cout << "TCM2: created group peer contact " << group_number << " " << peer_number << "\n";
 
-	return {_cr, c};
+	if (created) {
+		_cs.throwEventConstruct(c);
+	} else {
+		_cs.throwEventUpdate(c);
+	}
+
+	return {cr, c};
 }
 
-//Contact3Handle ToxContactModel2::getContactGroupPeer(const ToxKey& group_key, const ToxKey& peer_key) {
-	//return {};
-//}
+ContactHandle4 ToxContactModel2::getContactGroupPeer(uint32_t group_number, const ToxKey& peer_key) {
+	auto& cr = _cs.registry();
+	Contact4 c{entt::null};
 
-Contact3Handle ToxContactModel2::getContactGroupPeer(uint32_t group_number, const ToxKey& peer_key) {
-	Contact3 c = entt::null;
-
-	Contact3Handle group_c = getContactGroup(group_number);
+	auto group_c = getContactGroup(group_number);
 
 	assert(static_cast<bool>(group_c));
 
@@ -432,57 +502,59 @@ Contact3Handle ToxContactModel2::getContactGroupPeer(uint32_t group_number, cons
 
 	// search by key
 	//_cr.view<Contact::Components::ToxGroupPeerPersistent>().each([&c, &g_key, &peer_key](const Contact3 e, const Contact::Components::ToxGroupPeerPersistent& g_p_key_comp) {
-	for (const auto e : _cr.view<Contact::Components::ToxGroupPeerPersistent>()) {
-		const auto& g_p_key_comp = _cr.get<Contact::Components::ToxGroupPeerPersistent>(e);
+	for (const auto e : cr.view<Contact::Components::ToxGroupPeerPersistent>()) {
+		const auto& g_p_key_comp = cr.get<Contact::Components::ToxGroupPeerPersistent>(e);
 		if (peer_key == g_p_key_comp.peer_key && g_key == g_p_key_comp.chat_id) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
-		return {_cr, c};
+	if (cr.valid(c)) {
+		return {cr, c};
 	}
 
 	// TODO: maybe not create contacts via history sync
 	// check for id (empty contact) and merge
-	const std::vector<uint8_t> peer_key_vec{peer_key.data.cbegin(), peer_key.data.cend()};
-	for (const auto e : _cr.view<Contact::Components::ID>()) {
-		if (peer_key_vec == _cr.get<Contact::Components::ID>(e).data) {
-			c = e;
-			break;
-		}
-	}
+	c = _cs.getOneContactByID(group_c, ByteSpan{peer_key.data});
 
-	if (!_cr.valid(c)) {
+	bool created{false};
+	if (!cr.valid(c)) {
 		// else, new ent
-		c = _cr.create();
-		_cr.emplace<Contact::Components::ID>(c, peer_key_vec);
+		c = cr.create();
+		created = true;
+		cr.emplace<Contact::Components::ID>(c, std::vector<uint8_t>(ByteSpan{peer_key.data}));
 	}
 
-	_cr.emplace_or_replace<Contact::Components::Parent>(c, group_c);
+	cr.emplace_or_replace<Contact::Components::Parent>(c, group_c);
 	{ // add sub to parent
 		auto& parent_sub_list = group_c.get_or_emplace<Contact::Components::ParentOf>().subs;
 		if (std::find(parent_sub_list.cbegin(), parent_sub_list.cend(), c) == parent_sub_list.cend()) {
 			parent_sub_list.push_back(c);
 		}
 	}
-	_cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
-	//_cr.emplace_or_replace<Contact::Components::ToxGroupPeerEphemeral>(c, group_number, peer_number);
-	_cr.emplace_or_replace<Contact::Components::ToxGroupPeerPersistent>(c, g_key, peer_key);
-	_cr.emplace_or_replace<Contact::Components::TagPrivate>(c);
-	//_cr.emplace_or_replace<Contact::Components::Name>(c, "<unk>");
-	//_cr.emplace_or_replace<Contact::Components::Name>(c, std::get<0>(_t.toxGroupPeerGetName(group_number, peer_number)).value_or("<unk>"));
+	cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
+	//cr.emplace_or_replace<Contact::Components::ToxGroupPeerEphemeral>(c, group_number, peer_number);
+	cr.emplace_or_replace<Contact::Components::ToxGroupPeerPersistent>(c, g_key, peer_key);
+	cr.emplace_or_replace<Contact::Components::TagPrivate>(c);
+	//cr.emplace_or_replace<Contact::Components::Name>(c, "<unk>");
+	//cr.emplace_or_replace<Contact::Components::Name>(c, std::get<0>(_t.toxGroupPeerGetName(group_number, peer_number)).value_or("<unk>"));
 
 	{ // self
 		// TODO: this is very flaky
 		auto self_number_opt = _t.toxGroupSelfGetPeerId(group_number);
-		_cr.emplace_or_replace<Contact::Components::Self>(c, getContactGroupPeer(group_number, self_number_opt.value()));
+		cr.emplace_or_replace<Contact::Components::Self>(c, getContactGroupPeer(group_number, self_number_opt.value()));
 	}
 
 	std::cout << "TCM2: created group peer contact via pubkey " << group_number << "\n";
 
-	return {_cr, c};
+	if (created) {
+		_cs.throwEventConstruct(c);
+	} else {
+		_cs.throwEventUpdate(c);
+	}
+
+	return {cr, c};
 }
 
 bool ToxContactModel2::groupPeerCanSpeak(uint32_t group_number, uint32_t peer_number) {
@@ -524,17 +596,20 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Friend_Connection_Status* e) {
 	} else {
 		const auto ts = getTimeMS();
 
-		_cr.emplace_or_replace<Contact::Components::LastSeen>(c, ts);
+		c.emplace_or_replace<Contact::Components::LastSeen>(ts);
 
-		if (!_cr.all_of<Contact::Components::FirstSeen>(c)) {
-			_cr.emplace_or_replace<Contact::Components::FirstSeen>(c, ts);
+		if (!c.all_of<Contact::Components::FirstSeen>()) {
+			c.emplace_or_replace<Contact::Components::FirstSeen>(ts);
 		}
 	}
 
+	_cs.throwEventUpdate(c);
+
 	return false;
 }
 
 bool ToxContactModel2::onToxEvent(const Tox_Event_Friend_Status* e) {
+	// TODO: add status codes (or strings?) and implement me
 	//tox_event_friend_status_get_status(e);
 
 	//TOX_USER_STATUS_NONE,
@@ -542,6 +617,9 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Friend_Status* e) {
 	//TOX_USER_STATUS_BUSY,
 
 	//auto c = getContactFriend(tox_event_friend_status_get_friend_number(e));
+
+	//_cs.throwEventUpdate(c);
+
 	return false;
 }
 
@@ -554,6 +632,8 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Friend_Name* e) {
 	auto c = getContactFriend(tox_event_friend_name_get_friend_number(e));
 	c.emplace_or_replace<Contact::Components::Name>(std::string{name});
 
+	_cs.throwEventUpdate(c);
+
 	return false; // return true?
 }
 
@@ -566,57 +646,65 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Friend_Status_Message* e) {
 	auto c = getContactFriend(tox_event_friend_status_message_get_friend_number(e));
 	c.emplace_or_replace<Contact::Components::StatusText>(std::string{status_message}).fillFirstLineLength();
 
+	_cs.throwEventUpdate(c);
+
 	return false; // true?
 }
 
 bool ToxContactModel2::onToxEvent(const Tox_Event_Friend_Request* e) {
 	const ToxKey pub_key{tox_event_friend_request_get_public_key(e), TOX_PUBLIC_KEY_SIZE};
 
-	Contact3 c = entt::null;
+	auto& cr = _cs.registry();
+	Contact4 c{entt::null};
 
 	// check for existing
-	for (const auto e : _cr.view<Contact::Components::ToxFriendPersistent>()) {
-		if (pub_key == _cr.get<Contact::Components::ToxFriendPersistent>(e).key) {
+	for (const auto e : cr.view<Contact::Components::ToxFriendPersistent>()) {
+		if (pub_key == cr.get<Contact::Components::ToxFriendPersistent>(e).key) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
-		_cr.emplace_or_replace<Contact::Components::RequestIncoming>(c);
-		_cr.remove<Contact::Components::ToxFriendEphemeral>(c);
+	if (cr.valid(c)) {
+		cr.emplace_or_replace<Contact::Components::RequestIncoming>(c);
+		cr.remove<Contact::Components::ToxFriendEphemeral>(c);
 
 		std::cout << "TCM2: marked friend contact as requested\n";
+
+		_cs.throwEventUpdate(c);
+
 		return false; // return false, so tox_message can handle the message
 	}
 
 	// check for id (empty contact) and merge
-	const std::vector<uint8_t> pub_key_vec{pub_key.data.cbegin(), pub_key.data.cend()};
-	for (const auto e : _cr.view<Contact::Components::ID>()) {
-		if (pub_key_vec == _cr.get<Contact::Components::ID>(e).data) {
-			c = e;
-			break;
-		}
-	}
+	c = _cs.getOneContactByID(_root, ByteSpan{pub_key.data});
 
-	if (!_cr.valid(c)) {
+	bool created{false};
+	if (!cr.valid(c)) {
 		// else, new ent
-		c = _cr.create();
-		_cr.emplace<Contact::Components::ID>(c, pub_key_vec);
+		c = cr.create();
+		created = true;
+		cr.emplace<Contact::Components::ID>(c, static_cast<std::vector<uint8_t>>(ByteSpan{pub_key.data}));
 	}
 
-	_cr.emplace_or_replace<Contact::Components::RequestIncoming>(c);
-	_cr.emplace_or_replace<Contact::Components::TagBig>(c);
-	_cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
-	_cr.emplace_or_replace<Contact::Components::ToxFriendPersistent>(c, pub_key);
-	_cr.emplace_or_replace<Contact::Components::Parent>(c, _root);
-	_cr.get_or_emplace<Contact::Components::ParentOf>(_root).subs.push_back(c);
-	_cr.emplace_or_replace<Contact::Components::ParentOf>(c).subs.assign({_friend_self, c});
-	_cr.emplace_or_replace<Contact::Components::TagPrivate>(c);
-	_cr.emplace_or_replace<Contact::Components::Self>(c, _friend_self);
+	cr.emplace_or_replace<Contact::Components::RequestIncoming>(c);
+	cr.emplace_or_replace<Contact::Components::TagBig>(c);
+	cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
+	cr.emplace_or_replace<Contact::Components::ToxFriendPersistent>(c, pub_key);
+	cr.emplace_or_replace<Contact::Components::Parent>(c, _root);
+	cr.get_or_emplace<Contact::Components::ParentOf>(_root).subs.push_back(c);
+	cr.emplace_or_replace<Contact::Components::ParentOf>(c).subs.assign({_friend_self, c});
+	cr.emplace_or_replace<Contact::Components::TagPrivate>(c);
+	cr.emplace_or_replace<Contact::Components::Self>(c, _friend_self);
 
 	std::cout << "TCM2: created friend contact (requested)\n";
 
+	if (created) {
+		_cs.throwEventConstruct(c);
+	} else {
+		_cs.throwEventUpdate(c);
+	}
+
 	return false; // return false, so tox_message can handle the message
 }
 
@@ -627,61 +715,63 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Group_Invite* e) {
 	};
 
 	// HACK: extract chatid
-	// TODO: request better api
+	// TODO: request better api // I forgor
 	assert(tox_event_group_invite_get_invite_data_length(e) == TOX_GROUP_CHAT_ID_SIZE + TOX_GROUP_PEER_PUBLIC_KEY_SIZE);
 	const ToxKey chat_id{tox_event_group_invite_get_invite_data(e), TOX_GROUP_CHAT_ID_SIZE};
 
-	Contact3 c = entt::null;
+	auto& cr = _cs.registry();
+	Contact4 c{entt::null};
 
 	// check for existing
-	for (const auto e : _cr.view<Contact::Components::ToxGroupPersistent>()) {
-		if (chat_id == _cr.get<Contact::Components::ToxGroupPersistent>(e).chat_id) {
+	for (const auto e : cr.view<Contact::Components::ToxGroupPersistent>()) {
+		if (chat_id == cr.get<Contact::Components::ToxGroupPersistent>(e).chat_id) {
 			c = e;
 			break;
 		}
 	}
 
-	if (_cr.valid(c)) {
+	if (cr.valid(c)) {
 		std::cout << "TCM2: already in group from invite\n";
 		return false;
 	}
 
 	// check for id (empty contact) and merge
-	const std::vector<uint8_t> chat_id_vec{chat_id.data.cbegin(), chat_id.data.cend()};
-	for (const auto e : _cr.view<Contact::Components::ID>()) {
-		if (chat_id_vec == _cr.get<Contact::Components::ID>(e).data) {
-			c = e;
-			break;
-		}
-	}
+	c = _cs.getOneContactByID(_root, ByteSpan{chat_id.data});
 
-	if (!_cr.valid(c)) {
+	bool created{false};
+	if (!cr.valid(c)) {
 		// else, new ent
-		c = _cr.create();
-		_cr.emplace<Contact::Components::ID>(c, chat_id_vec);
+		c = cr.create();
+		created = true;
+		cr.emplace<Contact::Components::ID>(c, static_cast<std::vector<uint8_t>>(ByteSpan{chat_id.data}));
 	}
 
-	_cr.emplace_or_replace<Contact::Components::RequestIncoming>(c, true, true);
-	_cr.emplace_or_replace<Contact::Components::TagBig>(c);
-	_cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
-	_cr.emplace_or_replace<Contact::Components::Parent>(c, _root);
-	_cr.get_or_emplace<Contact::Components::ParentOf>(_root).subs.push_back(c);
-	_cr.emplace_or_replace<Contact::Components::ToxGroupPersistent>(c, chat_id);
-	_cr.emplace_or_replace<Contact::Components::TagGroup>(c);
-	_cr.emplace_or_replace<Contact::Components::Name>(c, std::string(group_name));
+	cr.emplace_or_replace<Contact::Components::RequestIncoming>(c, true, true);
+	cr.emplace_or_replace<Contact::Components::TagBig>(c);
+	cr.emplace_or_replace<Contact::Components::ContactModel>(c, this);
+	cr.emplace_or_replace<Contact::Components::Parent>(c, _root);
+	cr.get_or_emplace<Contact::Components::ParentOf>(_root).subs.push_back(c);
+	cr.emplace_or_replace<Contact::Components::ToxGroupPersistent>(c, chat_id);
+	cr.emplace_or_replace<Contact::Components::TagGroup>(c);
+	cr.emplace_or_replace<Contact::Components::Name>(c, std::string(group_name));
 
-	auto& ir = _cr.emplace<Contact::Components::ToxGroupIncomingRequest>(c);
+	auto& ir = cr.emplace<Contact::Components::ToxGroupIncomingRequest>(c);
 	ir.friend_number = tox_event_group_invite_get_friend_number(e);
 	ir.invite_data = {
 		tox_event_group_invite_get_invite_data(e),
 		tox_event_group_invite_get_invite_data(e) + tox_event_group_invite_get_invite_data_length(e)
 	};
 
-	// TODO: self
-	//_cr.emplace<Contact::Components::Self>(c, _friend_self);
+	// there is no self yet
 
 	std::cout << "TCM2: created group contact (requested)\n";
 
+	if (created) {
+		_cs.throwEventConstruct(c);
+	} else {
+		_cs.throwEventUpdate(c);
+	}
+
 	return false;
 }
 
@@ -689,6 +779,11 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Group_Self_Join* e) {
 	const uint32_t group_number = tox_event_group_self_join_get_group_number(e);
 	if (const auto self_id_opt = _t.toxGroupSelfGetPeerId(group_number); self_id_opt.has_value()) {
 		auto c = getContactGroupPeer(group_number, self_id_opt.value());
+
+		if (!static_cast<bool>(c)) {
+			return false;
+		}
+
 		c.emplace_or_replace<Contact::Components::TagSelfStrong>();
 		c.emplace_or_replace<Contact::Components::ConnectionState>(Contact::Components::ConnectionState::State::direct);
 
@@ -699,6 +794,7 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Group_Self_Join* e) {
 				? Contact::Components::ConnectionState::State::cloud
 				: Contact::Components::ConnectionState::State::disconnected
 		);
+		_cs.throwEventUpdate(gc);
 	} else {
 		assert(false);
 	}
@@ -712,6 +808,10 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Group_Peer_Join* e) {
 
 	auto c = getContactGroupPeer(group_number, peer_number);
 
+	if (!static_cast<bool>(c)) {
+		return false;
+	}
+
 	// ensure its set
 	c.emplace_or_replace<Contact::Components::ToxGroupPeerEphemeral>(group_number, peer_number);
 
@@ -724,18 +824,20 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Group_Peer_Join* e) {
 
 	const auto ts = getTimeMS();
 
-	_cr.emplace_or_replace<Contact::Components::LastSeen>(c, ts);
+	c.emplace_or_replace<Contact::Components::LastSeen>(ts);
 
-	if (!_cr.all_of<Contact::Components::FirstSeen>(c)) {
-		_cr.emplace_or_replace<Contact::Components::FirstSeen>(c, ts);
+	if (!c.all_of<Contact::Components::FirstSeen>()) {
+		c.emplace_or_replace<Contact::Components::FirstSeen>(ts);
 	}
 
 	// update name
 	const auto name_opt = std::get<0>(_t.toxGroupPeerGetName(group_number, peer_number));
 	if (name_opt.has_value()) {
-		_cr.emplace_or_replace<Contact::Components::Name>(c, name_opt.value());
+		c.emplace_or_replace<Contact::Components::Name>(name_opt.value());
 	}
 
+	_cs.throwEventUpdate(c);
+
 	return false;
 }
 
@@ -761,6 +863,7 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Group_Peer_Exit* e) {
 	}
 
 	c.emplace_or_replace<Contact::Components::ConnectionState>(Contact::Components::ConnectionState::State::disconnected);
+	_cs.throwEventUpdate(c); // HACK: throw update before removing ephemeral ids, so they can be used in the look up (but after setting disconnected)
 	c.remove<Contact::Components::ToxGroupPeerEphemeral>();
 
 	// TODO: produce system message with reason?
@@ -784,9 +887,14 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Group_Peer_Name* e) {
 	};
 
 	auto c = getContactGroupPeer(group_number, peer_number);
+	if (!static_cast<bool>(c)) {
+		return false;
+	}
 
 	c.emplace_or_replace<Contact::Components::Name>(std::string{name});
 
+	_cs.throwEventUpdate(c);
+
 	return false;
 }
 
@@ -799,8 +907,14 @@ bool ToxContactModel2::onToxEvent(const Tox_Event_Group_Topic* e) {
 	};
 
 	auto c = getContactGroup(group_number);
+	if (!static_cast<bool>(c)) {
+		return false;
+	}
+
 	c.emplace_or_replace<Contact::Components::StatusText>(std::string{topic}).fillFirstLineLength();
 
+	_cs.throwEventUpdate(c);
+
 	return false; // message model needs to produce a system message
 }
 
diff --git a/solanaceae/tox_contacts/tox_contact_model2.hpp b/solanaceae/tox_contacts/tox_contact_model2.hpp
index 5f802c4..3096680 100644
--- a/solanaceae/tox_contacts/tox_contact_model2.hpp
+++ b/solanaceae/tox_contacts/tox_contact_model2.hpp
@@ -1,45 +1,49 @@
 #pragma once
 
 #include <solanaceae/toxcore/tox_event_interface.hpp>
-#include <solanaceae/contact/contact_model3.hpp>
+#include <solanaceae/contact/contact_model4.hpp>
 
 #include <solanaceae/toxcore/tox_key.hpp>
 
 // fwd
 struct ToxI;
 
-// tox contact model for ContactModel3I
-class ToxContactModel2 : public ContactModel3I, public ToxEventI {
-	Contact3Registry& _cr;
+// tox contact model for ContactModel4I
+class ToxContactModel2 : public ContactModel4I, public ToxEventI {
+	ContactStore4I& _cs;
 	ToxI& _t;
 	ToxEventProviderI::SubscriptionReference _tep_sr;
 
-	Contact3 _root;
-	Contact3 _friend_self;
+	Contact4 _root;
+	Contact4 _friend_self;
 
 	float _group_status_timer {0.f};
 
 	public:
-		static constexpr const char* version {"3"};
+		static constexpr const char* version {"4"};
 
-		ToxContactModel2(Contact3Registry& cr, ToxI& t, ToxEventProviderI& tep);
+		ToxContactModel2(ContactStore4I& cs, ToxI& t, ToxEventProviderI& tep);
 		virtual ~ToxContactModel2(void);
 
 		// TODO: continually fetch group peer connection state, since JF does not want to add cb/event
 		void iterate(float delta);
 
 	protected: // mmi
+		bool addContact(Contact4 c) override;
+
 		// accept incoming request
-		void acceptRequest(Contact3 c, std::string_view self_name, std::string_view password) override;
+		bool acceptRequest(Contact4 c, std::string_view self_name, std::string_view password) override;
+
+		bool leave(Contact4 c, std::string_view reason) override;
 
 	public: // util for tox code
 		// also creates if non existant
-		Contact3Handle getContactFriend(uint32_t friend_number);
+		ContactHandle4 getContactFriend(uint32_t friend_number);
 
-		Contact3Handle getContactGroup(uint32_t group_number);
-		Contact3Handle getContactGroupPeer(uint32_t group_number, uint32_t peer_number);
-		//Contact3Handle getContactGroupPeer(const ToxKey& group_key, const ToxKey& peer_key);
-		Contact3Handle getContactGroupPeer(uint32_t group_number, const ToxKey& peer_key);
+		ContactHandle4 getContactGroup(uint32_t group_number);
+		ContactHandle4 getContactGroupPeer(uint32_t group_number, uint32_t peer_number);
+		//ContactHandle4 getContactGroupPeer(const ToxKey& group_key, const ToxKey& peer_key);
+		ContactHandle4 getContactGroupPeer(uint32_t group_number, const ToxKey& peer_key);
 
 		// TODO: add proper perm api to contacts
 		bool groupPeerCanSpeak(uint32_t group_number, uint32_t peer_number);
diff --git a/solanaceae/tox_messages/msg_components.hpp b/solanaceae/tox_messages/msg_components.hpp
index 69044e7..432a3f4 100644
--- a/solanaceae/tox_messages/msg_components.hpp
+++ b/solanaceae/tox_messages/msg_components.hpp
@@ -1,7 +1,5 @@
 #pragma once
 
-#include <solanaceae/contact/contact_model3.hpp>
-
 #include <cstdint>
 
 namespace Message::Components {
diff --git a/solanaceae/tox_messages/tox_message_manager.cpp b/solanaceae/tox_messages/tox_message_manager.cpp
index 758e8e1..57a1ac4 100644
--- a/solanaceae/tox_messages/tox_message_manager.cpp
+++ b/solanaceae/tox_messages/tox_message_manager.cpp
@@ -3,6 +3,7 @@
 #include <solanaceae/util/time.hpp>
 
 #include <solanaceae/toxcore/tox_interface.hpp>
+#include <solanaceae/contact/contact_store_i.hpp>
 
 #include <solanaceae/contact/components.hpp>
 #include <solanaceae/tox_contacts/components.hpp>
@@ -17,14 +18,14 @@
 
 ToxMessageManager::ToxMessageManager(
 	RegistryMessageModelI& rmm,
-	Contact3Registry& cr,
+	ContactStore4I& cs,
 	ToxContactModel2& tcm,
 	ToxI& t,
 	ToxEventProviderI& tep
 ) :
 	_rmm(rmm),
 	_rmm_sr(_rmm.newSubRef(this)),
-	_cr(cr),
+	_cs(cs),
 	_tcm(tcm),
 	_t(t),
 	_tep_sr(tep.newSubRef(this))
@@ -52,8 +53,9 @@ ToxMessageManager::ToxMessageManager(
 ToxMessageManager::~ToxMessageManager(void) {
 }
 
-bool ToxMessageManager::sendText(const Contact3 c, std::string_view message, bool action) {
-	if (!_cr.valid(c)) {
+bool ToxMessageManager::sendText(const Contact4 c, std::string_view message, bool action) {
+	const auto& cr = _cs.registry();
+	if (!cr.valid(c)) {
 		return false;
 	}
 
@@ -61,12 +63,12 @@ bool ToxMessageManager::sendText(const Contact3 c, std::string_view message, boo
 		return false; // TODO: empty messages allowed?
 	}
 
-	if (_cr.all_of<Contact::Components::TagSelfStrong>(c)) {
+	if (cr.all_of<Contact::Components::TagSelfStrong>(c)) {
 		return false; // message to self? not with tox
 	}
 
 	// testing for persistent is enough
-	if (!_cr.any_of<
+	if (!cr.any_of<
 		Contact::Components::ToxFriendPersistent,
 		// TODO: conf
 		Contact::Components::ToxGroupPersistent,
@@ -82,11 +84,11 @@ bool ToxMessageManager::sendText(const Contact3 c, std::string_view message, boo
 
 	Message3Registry& reg = *reg_ptr;
 
-	if (!_cr.all_of<Contact::Components::Self>(c)) {
+	if (!cr.all_of<Contact::Components::Self>(c)) {
 		std::cerr << "TMM error: cant get self\n";
 		return false;
 	}
-	const Contact3 c_self = _cr.get<Contact::Components::Self>(c).self;
+	const Contact4 c_self = cr.get<Contact::Components::Self>(c).self;
 
 	// get current time unix epoch utc
 	uint64_t ts = getTimeMS();
@@ -114,8 +116,8 @@ bool ToxMessageManager::sendText(const Contact3 c, std::string_view message, boo
 
 	reg.emplace<Message::Components::ReceivedBy>(new_msg_e).ts[c_self] = ts;
 
-	if (_cr.any_of<Contact::Components::ToxFriendEphemeral>(c)) {
-		const uint32_t friend_number = _cr.get<Contact::Components::ToxFriendEphemeral>(c).friend_number;
+	if (cr.any_of<Contact::Components::ToxFriendEphemeral>(c)) {
+		const uint32_t friend_number = cr.get<Contact::Components::ToxFriendEphemeral>(c).friend_number;
 
 		auto [res, _] = _t.toxFriendSendMessage(
 			friend_number,
@@ -132,16 +134,16 @@ bool ToxMessageManager::sendText(const Contact3 c, std::string_view message, boo
 		} else {
 			reg.emplace<Message::Components::ToxFriendMessageID>(new_msg_e, res.value());
 		}
-	} else if (_cr.any_of<Contact::Components::ToxFriendPersistent>(c)) {
+	} else if (cr.any_of<Contact::Components::ToxFriendPersistent>(c)) {
 		// here we just assume friend not online (no ephemeral id)
 		// set manually, so it can still be synced
 		const uint32_t msg_id = randombytes_random();
 		reg.emplace<Message::Components::ToxFriendMessageID>(new_msg_e, msg_id);
 		std::cerr << "TMM: failed to send friend message, offline and not in tox profile\n";
 	} else if (
-		_cr.any_of<Contact::Components::ToxGroupEphemeral>(c)
+		cr.any_of<Contact::Components::ToxGroupEphemeral>(c)
 	) {
-		const uint32_t group_number = _cr.get<Contact::Components::ToxGroupEphemeral>(c).group_number;
+		const uint32_t group_number = cr.get<Contact::Components::ToxGroupEphemeral>(c).group_number;
 
 		auto [message_id_opt, _] = _t.toxGroupSendMessage(
 			group_number,
@@ -164,7 +166,7 @@ bool ToxMessageManager::sendText(const Contact3 c, std::string_view message, boo
 		}
 	} else if (
 		// non online group
-		_cr.any_of<Contact::Components::ToxGroupPersistent>(c)
+		cr.any_of<Contact::Components::ToxGroupPersistent>(c)
 	) {
 		// create msg_id
 		const uint32_t msg_id = randombytes_random();
@@ -173,9 +175,9 @@ bool ToxMessageManager::sendText(const Contact3 c, std::string_view message, boo
 		// TODO: generalize?
 		reg.emplace<Message::Components::SyncedBy>(new_msg_e).ts.emplace(c_self, ts);
 	} else if (
-		_cr.any_of<Contact::Components::ToxGroupPeerEphemeral>(c)
+		cr.any_of<Contact::Components::ToxGroupPeerEphemeral>(c)
 	) {
-		const auto& numbers = _cr.get<Contact::Components::ToxGroupPeerEphemeral>(c);
+		const auto& numbers = cr.get<Contact::Components::ToxGroupPeerEphemeral>(c);
 
 		auto [message_id_opt, _] = _t.toxGroupSendPrivateMessage(
 			numbers.group_number,
diff --git a/solanaceae/tox_messages/tox_message_manager.hpp b/solanaceae/tox_messages/tox_message_manager.hpp
index 2bdd2f9..6ac4765 100644
--- a/solanaceae/tox_messages/tox_message_manager.hpp
+++ b/solanaceae/tox_messages/tox_message_manager.hpp
@@ -11,19 +11,20 @@ class ToxMessageManager : public RegistryMessageModelEventI, public ToxEventI {
 	protected:
 		RegistryMessageModelI& _rmm;
 		RegistryMessageModelI::SubscriptionReference _rmm_sr;
-		Contact3Registry& _cr;
+		ContactStore4I& _cs;
 		ToxContactModel2& _tcm;
 		ToxI& _t;
 		ToxEventProviderI::SubscriptionReference _tep_sr;
 
 	public:
-		ToxMessageManager(RegistryMessageModelI& rmm, Contact3Registry& cr, ToxContactModel2& tcm, ToxI& t, ToxEventProviderI& tep);
+		ToxMessageManager(RegistryMessageModelI& rmm, ContactStore4I& cs, ToxContactModel2& tcm, ToxI& t, ToxEventProviderI& tep);
 		virtual ~ToxMessageManager(void);
 
 	public: // mm3
-		bool sendText(const Contact3 c, std::string_view message, bool action = false) override;
+		bool sendText(const Contact4 c, std::string_view message, bool action = false) override;
 
 	protected: // tox events
+		// TODO: add friend request message handling
 		bool onToxEvent(const Tox_Event_Friend_Message* e) override;
 		bool onToxEvent(const Tox_Event_Friend_Read_Receipt* e) override;
 
diff --git a/solanaceae/tox_messages/tox_transfer_manager.cpp b/solanaceae/tox_messages/tox_transfer_manager.cpp
index b6eaba1..8cf4d42 100644
--- a/solanaceae/tox_messages/tox_transfer_manager.cpp
+++ b/solanaceae/tox_messages/tox_transfer_manager.cpp
@@ -3,6 +3,7 @@
 #include <solanaceae/util/time.hpp>
 
 #include <solanaceae/toxcore/tox_interface.hpp>
+#include <solanaceae/contact/contact_store_i.hpp>
 
 #include <solanaceae/file/file2_std.hpp>
 
@@ -11,8 +12,6 @@
 #include <solanaceae/message3/components.hpp>
 #include "./msg_components.hpp"
 #include "./obj_components.hpp"
-#include "solanaceae/object_store/meta_components.hpp"
-#include "solanaceae/util/span.hpp"
 
 #include <sodium.h>
 
@@ -81,12 +80,12 @@ ObjectHandle ToxTransferManager::toxFriendLookupReceiving(const uint32_t friend_
 
 ToxTransferManager::ToxTransferManager(
 	RegistryMessageModelI& rmm,
-	Contact3Registry& cr,
+	ContactStore4I& cs,
 	ToxContactModel2& tcm,
 	ToxI& t,
 	ToxEventProviderI& tep,
 	ObjectStore2& os
-) : _rmm(rmm), _rmm_sr(_rmm.newSubRef(this)), _cr(cr), _tcm(tcm), _t(t), _tep_sr(tep.newSubRef(this)), _os(os), _os_sr(_os.newSubRef(this)), _ftb(os) {
+) : _rmm(rmm), _rmm_sr(_rmm.newSubRef(this)), _cs(cs), _tcm(tcm), _t(t), _tep_sr(tep.newSubRef(this)), _os(os), _os_sr(_os.newSubRef(this)), _ftb(os) {
 	_tep_sr
 		.subscribe(Tox_Event_Type::TOX_EVENT_FRIEND_CONNECTION_STATUS)
 		.subscribe(Tox_Event_Type::TOX_EVENT_FILE_RECV)
@@ -110,10 +109,11 @@ void ToxTransferManager::iterate(void) {
 	// TODO: time out transfers
 }
 
-Message3Handle ToxTransferManager::toxSendFilePath(const Contact3 c, uint32_t file_kind, std::string_view file_name, std::string_view file_path, std::vector<uint8_t> file_id) {
+Message3Handle ToxTransferManager::toxSendFilePath(const Contact4 c, uint32_t file_kind, std::string_view file_name, std::string_view file_path, std::vector<uint8_t> file_id) {
+	const auto& cr = _cs.registry();
 	if (
 		// TODO: add support of offline queuing
-		!_cr.all_of<Contact::Components::ToxFriendEphemeral>(c)
+		!cr.all_of<Contact::Components::ToxFriendEphemeral>(c)
 	) {
 		std::cerr << "TTM error: unsupported contact type\n";
 		return {};
@@ -142,8 +142,8 @@ Message3Handle ToxTransferManager::toxSendFilePath(const Contact3 c, uint32_t fi
 	}
 	assert(file_id.size() == 32);
 
-	const auto c_self = _cr.get<Contact::Components::Self>(c).self;
-	if (!_cr.valid(c_self)) {
+	const auto c_self = cr.get<Contact::Components::Self>(c).self;
+	if (!cr.valid(c_self)) {
 		std::cerr << "TTM error: failed to get self!\n";
 		return {};
 	}
@@ -173,7 +173,7 @@ Message3Handle ToxTransferManager::toxSendFilePath(const Contact3 c, uint32_t fi
 	msg.emplace<Message::Components::ReceivedBy>().ts.try_emplace(c_self, ts);
 	msg.emplace<Message::Components::MessageFileObject>(o);
 
-	const auto friend_number = _cr.get<Contact::Components::ToxFriendEphemeral>(c).friend_number;
+	const auto friend_number = cr.get<Contact::Components::ToxFriendEphemeral>(c).friend_number;
 	const auto&& [transfer_id, err] = _t.toxFileSend(friend_number, file_kind, file_impl->_file_size, file_id, file_name);
 	if (err == TOX_ERR_FILE_SEND_OK) {
 		assert(transfer_id.has_value());
@@ -383,10 +383,11 @@ bool ToxTransferManager::accept(ObjectHandle transfer, std::string_view file_pat
 	return true;
 }
 
-bool ToxTransferManager::sendFilePath(const Contact3 c, std::string_view file_name, std::string_view file_path) {
+bool ToxTransferManager::sendFilePath(const Contact4 c, std::string_view file_name, std::string_view file_path) {
+	const auto& cr = _cs.registry();
 	if (
 		// TODO: add support of offline queuing
-		!_cr.all_of<Contact::Components::ToxFriendEphemeral>(c)
+		!cr.all_of<Contact::Components::ToxFriendEphemeral>(c)
 	) {
 		// TODO: add support for persistant friend filesends
 		return false;
@@ -504,7 +505,9 @@ bool ToxTransferManager::onToxEvent(const Tox_Event_File_Recv* e) {
 	// get current time unix epoch utc
 	uint64_t ts = getTimeMS();
 
-	auto self_c = _cr.get<Contact::Components::Self>(c).self;
+	const auto& cr = _cs.registry();
+
+	auto self_c = cr.get<Contact::Components::Self>(c).self;
 
 	o = _ftb.newObject(ByteSpan{f_id_opt.value()}, false);
 
@@ -628,7 +631,7 @@ bool ToxTransferManager::onToxEvent(const Tox_Event_File_Recv_Chunk* e) {
 
 			auto c = _tcm.getContactFriend(friend_number);
 			if (static_cast<bool>(c)) {
-				auto self_c = _cr.get<Contact::Components::Self>(c).self;
+				auto self_c = c.get<Contact::Components::Self>().self;
 				auto& rb = msg.get_or_emplace<Message::Components::ReceivedBy>().ts;
 				rb.try_emplace(self_c, ts); // on completion
 			}
diff --git a/solanaceae/tox_messages/tox_transfer_manager.hpp b/solanaceae/tox_messages/tox_transfer_manager.hpp
index 6fe4c88..68646ec 100644
--- a/solanaceae/tox_messages/tox_transfer_manager.hpp
+++ b/solanaceae/tox_messages/tox_transfer_manager.hpp
@@ -7,8 +7,9 @@
 
 #include "./backends/tox_ft_filesystem.hpp"
 
-// switch to fwd or remove
-#include <solanaceae/file/file2.hpp>
+//#include <solanaceae/file/file2.hpp>
+// fwd
+struct File2I;
 
 #include <entt/container/dense_map.hpp>
 
@@ -20,12 +21,12 @@ struct ToxI;
 
 class ToxTransferManager : public RegistryMessageModelEventI, public ObjectStoreEventI, public ToxEventI {
 	public:
-		static constexpr const char* version {"2"};
+		static constexpr const char* version {"3"};
 
 	protected:
 		RegistryMessageModelI& _rmm;
 		RegistryMessageModelI::SubscriptionReference _rmm_sr;
-		Contact3Registry& _cr;
+		ContactStore4I& _cs;
 		ToxContactModel2& _tcm;
 		ToxI& _t;
 		ToxEventProviderI::SubscriptionReference _tep_sr;
@@ -48,7 +49,7 @@ class ToxTransferManager : public RegistryMessageModelEventI, public ObjectStore
 	public:
 		ToxTransferManager(
 			RegistryMessageModelI& rmm,
-			Contact3Registry& cr,
+			ContactStore4I& cs,
 			ToxContactModel2& tcm,
 			ToxI& t,
 			ToxEventProviderI& tep,
@@ -59,7 +60,7 @@ class ToxTransferManager : public RegistryMessageModelEventI, public ObjectStore
 		virtual void iterate(void);
 
 	public: // TODO: private?
-		Message3Handle toxSendFilePath(const Contact3 c, uint32_t file_kind, std::string_view file_name, std::string_view file_path, std::vector<uint8_t> file_id = {});
+		Message3Handle toxSendFilePath(const Contact4 c, uint32_t file_kind, std::string_view file_name, std::string_view file_path, std::vector<uint8_t> file_id = {});
 
 		bool resume(ObjectHandle transfer);
 		bool pause(ObjectHandle transfer);
@@ -72,7 +73,7 @@ class ToxTransferManager : public RegistryMessageModelEventI, public ObjectStore
 		bool accept(ObjectHandle transfer, std::string_view file_path, bool path_is_file);
 
 	protected: // (r)mm
-		bool sendFilePath(const Contact3 c, std::string_view file_name, std::string_view file_path) override;
+		bool sendFilePath(const Contact4 c, std::string_view file_name, std::string_view file_path) override;
 
 	protected: // os
 		//bool onEvent(const ObjectStore::Events::ObjectConstruct&) override;