diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d295d41..0fc181c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -6,6 +6,15 @@ project(tox_ngc_ft1_tool C CXX)
 
 add_executable(tox_ngc_ft1_tool
 	./main.cpp
+
+	./command_line.hpp
+	./command_line.cpp
+
+	./tox_utils.hpp
+	./tox_utils.cpp
+
+	./tox_client.hpp
+	./tox_client.cpp
 )
 
 target_compile_features(tox_ngc_ft1_tool PUBLIC cxx_std_17)
diff --git a/src/command_line.cpp b/src/command_line.cpp
new file mode 100644
index 0000000..ff1a29f
--- /dev/null
+++ b/src/command_line.cpp
@@ -0,0 +1,94 @@
+#include "./command_line.hpp"
+
+#include <iostream>
+#include <cassert>
+
+CommandLine::CommandLine(int argc, char** argv) {
+	assert(argc > 0);
+
+	exe = argv[0];
+
+	for (int i = 1; i < argc; i++) {
+		std::string_view arg_sv{argv[i]};
+
+		if (arg_sv == "-v") {
+			version = true;
+			_should_exit = true;
+		} else if (arg_sv == "-V") {
+			verbose = true;
+		} else if (arg_sv == "-h") {
+			help = true;
+			printHelp();
+			_should_exit = true;
+		} else if (arg_sv == "-G") {
+			if (i+1 >= argc) {
+				std::cerr << "-G missing <chat_id> parameter!\n\n";
+				printHelp();
+				_should_exit = true;
+				return;
+			}
+			chat_id = argv[++i];
+		} else if (arg_sv == "-F") {
+			if (i+1 >= argc) {
+				std::cerr << "-F missing <path> parameter!\n\n";
+				printHelp();
+				_should_exit = true;
+				return;
+			}
+			profile_path = argv[++i];
+		} else if (arg_sv == "-a") {
+		} else if (arg_sv == "-f") {
+			if (i+1 >= argc) {
+				std::cerr << "-f missing <path> parameter!\n\n";
+				printHelp();
+				_should_exit = true;
+				return;
+			}
+			send_path = argv[++i];
+		} else if (arg_sv == "-d") {
+			if (i+1 >= argc) {
+				std::cerr << "-d missing <path> parameter!\n\n";
+				printHelp();
+				_should_exit = true;
+				return;
+			}
+			receive_dump_dir = argv[++i];
+		} else if (arg_sv == "-D") {
+			if (i+1 >= argc) {
+				std::cerr << "-D missing <id/hash> parameter!\n\n";
+				printHelp();
+				_should_exit = true;
+				return;
+			}
+			receive_id = argv[++i];
+		}
+	}
+}
+
+void CommandLine::printHelp(void) {
+	std::cout
+		<< "meta:\n"
+		<< " -v version info\n"
+		<< " -V verbose\n"
+		<< " -h help\n"
+		<< "\n"
+		<< " connectivity:\n"
+		<< " -G <chat_id>\n"
+		<< " -F profile.tox\n"
+		<< " will print friend id at startup\n"
+		<< " will autoaccept any invite\n"
+		<< " if no -F give, will not save profile.\n"
+		<< " if profile exists load, otherwise create new\n"
+		<< "\n"
+		<< " transfer variant:\n"
+		<< " -a id1/sha128_single/sha128_info/sha256_single/sha256_info\n"
+		<< "\n"
+		<< " send:\n"
+		<< " -f send_this_file.zip\n"
+		<< "\n"
+		<< " receive:\n"
+		<< " -d dump/everything/in/this/dir\n"
+		<< " -D <id/hash> (what to dl)\n"
+	;
+}
+
diff --git a/src/command_line.hpp b/src/command_line.hpp
new file mode 100644
index 0000000..952a77d
--- /dev/null
+++ b/src/command_line.hpp
@@ -0,0 +1,65 @@
+#pragma once
+
+#include <string>
+
+// meta:
+// -v version info
+// -V verbose
+// -h help
+//
+// connectivity:
+// -G <chat_id>
+// -F profile.tox
+// will print friend id at startup
+// will autoaccept any invite
+// if no -F give, will not save profile.
+// if profile exists load, otherwise create new
+//
+// transfer variant:
+// -a id1/sha128_single/sha128_info/sha256_single/sha256_info
+//
+// send:
+// -f send_this_file.zip
+//
+// receive:
+// -d dump/everything/in/this/dir
+// -D <id/hash> (what to dl)
+
+struct CommandLine {
+	std::string exe;
+
+	// meta:
+	// -v
+	bool version {false};
+	// -V
+	bool verbose {false};
+	// -h
+	bool help {false};
+
+	// connectivity:
+	// -G <chat_id>
+	std::string chat_id;
+	// -F profile.tox
+	std::string profile_path;
+
+	// transfer variant:
+	// -a id1/sha128_single/sha128_info/sha256_single/sha256_info
+	// some enum?
+
+	// send:
+	// -f send_this_file.zip
+	std::string send_path;
+
+	// receive:
+	// -d dump/everything/in/this/dir
+	std::string receive_dump_dir;
+	// -D <id/hash> (what to dl)
+	std::string receive_id;
+
+	CommandLine(int argc, char** argv);
+
+	void printHelp(void);
+
+	bool _should_exit {false};
+};
+
diff --git a/src/main.cpp b/src/main.cpp
index 462ba71..6a706ec 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6 +1,29 @@
-#include <tox/tox.h>
+#include "./tox_client.hpp"
+
+#include "./command_line.hpp"
+
+#include <memory>
+#include <iostream>
+#include <unordered_map>
 
 int main(int argc, char** argv) {
+	CommandLine cl(argc, argv);
+
+	if (cl.version) {
+		std::cout << "tox_ngc_ft1_tool v0.0.1\n";
+	}
+
+	if (cl._should_exit) {
+		return 0;
+	}
+
+	ToxClient client(cl);
+
+	std::cout << "tox id: " << client.getOwnAddress() << "\n";
+
+	while (true) {
+		client.iterate();
+	}
 
 	return 0;
 }
diff --git a/src/tox_client.cpp b/src/tox_client.cpp
new file mode 100644
index 0000000..4cadb46
--- /dev/null
+++ b/src/tox_client.cpp
@@ -0,0 +1,98 @@
+#include "./tox_client.hpp"
+
+#include "./tox_utils.hpp"
+
+#include <vector>
+#include <fstream>
+#include <cassert>
+#include <iostream>
+#include <stdexcept>
+
+ToxClient::ToxClient(const CommandLine& cl) :
+	_tox_profile_path(cl.profile_path)
+{
+	TOX_ERR_OPTIONS_NEW err_opt_new;
+	Tox_Options* options = tox_options_new(&err_opt_new);
+	assert(err_opt_new == TOX_ERR_OPTIONS_NEW::TOX_ERR_OPTIONS_NEW_OK);
+
+	// use cl for options
+	//tox_options_set_log_callback(options, log_cb);
+	tox_options_set_local_discovery_enabled(options, false);
+	tox_options_set_udp_enabled(options, true);
+	tox_options_set_hole_punching_enabled(options, true);
+
+	std::vector<uint8_t> profile_data{};
+	if (!_tox_profile_path.empty()) {
+		std::ifstream ifile{_tox_profile_path, std::ios::binary};
+
+		if (ifile.is_open()) {
+			std::cout << "TOX loading save " << _tox_profile_path << "\n";
+			// fill savedata
+			while (ifile.good()) {
+				auto ch = ifile.get();
+				if (ch == EOF) {
+					break;
+				} else {
+					profile_data.push_back(ch);
+				}
+			}
+
+			if (profile_data.empty()) {
+				std::cerr << "empty tox save\n";
+			} else {
+				// set options
+				tox_options_set_savedata_type(options, TOX_SAVEDATA_TYPE_TOX_SAVE);
+				tox_options_set_savedata_data(options, profile_data.data(), profile_data.size());
+			}
+
+			ifile.close(); // do i need this?
+		}
+	}
+
+	TOX_ERR_NEW err_new;
+	_tox = tox_new(options, &err_new);
+	tox_options_free(options);
+	if (err_new != TOX_ERR_NEW_OK) {
+		std::cerr << "tox_new failed with error code " << err_new << "\n";
+		throw std::runtime_error{"tox failed"};
+	}
+
+	_tox_profile_dirty = true;
+}
+
+void ToxClient::iterate(void) {
+	tox_iterate(_tox, this);
+
+	if (_tox_profile_dirty) {
+		saveToxProfile();
+	}
+}
+
+std::string ToxClient::getOwnAddress(void) const {
+	std::vector<uint8_t> self_addr{};
+	self_addr.resize(TOX_ADDRESS_SIZE);
+
+	tox_self_get_address(_tox, self_addr.data());
+
+	return bin2hex(self_addr);
+}
+
+void ToxClient::saveToxProfile(void) {
+	if (_tox_profile_path.empty()) {
+		return;
+	}
+
+	std::vector<uint8_t> data{};
+	data.resize(tox_get_savedata_size(_tox));
+	tox_get_savedata(_tox, data.data());
+
+	std::ofstream ofile{_tox_profile_path, std::ios::binary};
+	// TODO: improve
+	for (const auto& ch : data) {
+		ofile.put(ch);
+	}
+	ofile.close(); // TODO: do i need this
+
+	_tox_profile_dirty = false;
+}
+
diff --git a/src/tox_client.hpp b/src/tox_client.hpp
new file mode 100644
index 0000000..ad5c736
--- /dev/null
+++ b/src/tox_client.hpp
@@ -0,0 +1,31 @@
+#pragma once
+
+#include "./command_line.hpp"
+
+#include <tox/tox.h>
+#include <ngc_ext.h>
+#include <ngc_ft1.h>
+
+#include <string>
+
+struct ToxClient final {
+	ToxClient(const CommandLine& cl);
+
+	void iterate(void);
+
+	void setToxProfilePath(const std::string& new_path) { _tox_profile_path = new_path; }
+
+	std::string getOwnAddress(void) const;
+
+	private:
+		void saveToxProfile(void);
+
+	private:
+		Tox* _tox {nullptr};
+		NGC_EXT_CTX* _ext_ctx {nullptr};
+		NGC_FT1* _ft1_ctx {nullptr};
+
+		std::string _tox_profile_path;
+		bool _tox_profile_dirty {false}; // set in callbacks
+};
+
diff --git a/src/tox_utils.cpp b/src/tox_utils.cpp
new file mode 100644
index 0000000..e8ddb11
--- /dev/null
+++ b/src/tox_utils.cpp
@@ -0,0 +1,23 @@
+#include "./tox_utils.hpp"
+
+#include <sodium.h>
+
+std::vector<uint8_t> hex2bin(const std::string& str) {
+	std::vector<uint8_t> bin{};
+	bin.resize(str.size()/2, 0);
+
+	sodium_hex2bin(bin.data(), bin.size(), str.c_str(), str.length(), nullptr, nullptr, nullptr);
+
+	return bin;
+}
+
+std::string bin2hex(const std::vector<uint8_t>& bin) {
+	std::string str{};
+	str.resize(bin.size()*2, '?');
+
+	// HECK, std is 1 larger than size returns ('\0')
+	sodium_bin2hex(str.data(), str.size()+1, bin.data(), bin.size());
+
+	return str;
+}
+
diff --git a/src/tox_utils.hpp b/src/tox_utils.hpp
new file mode 100644
index 0000000..21e62cd
--- /dev/null
+++ b/src/tox_utils.hpp
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+std::vector<uint8_t> hex2bin(const std::string& str);
+std::string bin2hex(const std::vector<uint8_t>& bin);
+