How to use this library?

[rekire]

I'm interested in building a Flutter chat app using the signal protocol. However I'm not really sure how to use this library.

Of cause I checked the example, but that one is more or less just a unit test out of my view. I'm looking for information which generated keys I need to store so that I can decrypt them when I restart my app. Which and how do I exchange the keys?

I also tried to check the "real" sample app, but I cannot compile it. At first I get dart compile errors and then (after simply removing the broken code) native errors. Great! I installed therefore the Windows App which requires a sign in from your Android app. Then on my mobile I have to register... I do not want to share my mobile number with you just to check your app. Even the strings from the onboarding are not in the code base. This is so strange.

[Tougee]

Here we have a better example to show how to use this lib that you can try. https://github.com/MixinNetwork/libsignal_protocol_dart/pull/62

And could you please share compilation error message, maybe we can help with this.

[rekire]

I got this compile error here (the encoding errors are already in my console):

Nuget.exe not found, trying to download or use cached version.
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_GetRestrictedErrorInfo" in Funktion ""public: __cdecl winrt::hresult_error::hresult_error(struct winrt::hresult,struct winrt::take_ownership_from_abi_t)" (??0hresult_error@winrt@@QEAA@Uhresult@1@Utake_ownership_from_abi_t@1@@Z)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
DesktopNotificationManagerCompat.obj : error LNK2001: Nicht aufgel�stes externes Symbol "WINRT_GetRestrictedErrorInfo". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_RoGetActivationFactory" in Funktion ""struct winrt::Windows::Foundation::IActivationFactory __cdecl winrt::get_activation_factory<struct winrt::Windows::Foundation::IActivationFactory>(struct winrt::param::hstring const &)" (??$get_activation_factory@UIActivationFactory@Foundation@Windows@winrt@@@winrt@@YA?AUIActivationFactory@Foundation@Windows@0@AEBUhstring@param@0@@Z)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
DesktopNotificationManagerCompat.obj : error LNK2001: Nicht aufgel�stes externes Symbol "WINRT_RoGetActivationFactory". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_RoOriginateLanguageException" in Funktion ""private: void __cdecl winrt::hresult_error::originate(struct winrt::hresult,void *)" (?originate@hresult_error@winrt@@AEAAXUhresult@2@PEAX@Z)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
DesktopNotificationManagerCompat.obj : error LNK2001: Nicht aufgel�stes externes Symbol "WINRT_RoOriginateLanguageException". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_SetRestrictedErrorInfo" in Funktion ""public: struct winrt::hresult __cdecl winrt::hresult_error::to_abi(void)const " (?to_abi@hresult_error@winrt@@QEBA?AUhresult@2@XZ)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_WindowsCreateString" in Funktion ""void * __cdecl winrt::impl::create_string(wchar_t const *,unsigned int)" (?create_string@impl@winrt@@YAPEAXPEB_WI@Z)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
DesktopNotificationManagerCompat.obj : error LNK2001: Nicht aufgel�stes externes Symbol "WINRT_WindowsCreateString". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_WindowsCreateStringReference" in Funktion ""public: __cdecl winrt::param::hstring::hstring(class std::basic_string<wchar_t,struct std::char_traits<wchar_t>,class std::allocator<wchar_t> > const &)" (??0hstring@param@winrt@@QEAA@AEBV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@@Z)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
DesktopNotificationManagerCompat.obj : error LNK2001: Nicht aufgel�stes externes Symbol "WINRT_WindowsCreateStringReference". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_WindowsDeleteString" in Funktion ""public: static void __cdecl winrt::impl::hstring_traits::close(void *)" (?close@hstring_traits@impl@winrt@@SAXPEAX@Z)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
DesktopNotificationManagerCompat.obj : error LNK2001: Nicht aufgel�stes externes Symbol "WINRT_WindowsDeleteString". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_WindowsPreallocateStringBuffer" in Funktion ""public: __cdecl winrt::impl::hstring_builder::hstring_builder(unsigned int)" (??0hstring_builder@impl@winrt@@QEAA@I@Z)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_WindowsDeleteStringBuffer" in Funktion ""public: __cdecl winrt::impl::hstring_builder::~hstring_builder(void)" (??1hstring_builder@impl@winrt@@QEAA@XZ)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_WindowsPromoteStringBuffer" in Funktion ""public: struct winrt::hstring __cdecl winrt::impl::hstring_builder::to_hstring(void)" (?to_hstring@hstring_builder@impl@winrt@@QEAA?AUhstring@3@XZ)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
win_toast_plugin.obj : error LNK2019: Verweis auf nicht aufgel�stes externes Symbol "WINRT_WindowsGetStringRawBuffer" in Funktion ""public: wchar_t const * __cdecl winrt::hstring::begin(void)const " (?begin@hstring@winrt@@QEBAPEB_WXZ)". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
DesktopNotificationManagerCompat.obj : error LNK2001: Nicht aufgel�stes externes Symbol "WINRT_WindowsGetStringRawBuffer". [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\Debug\win_toast_plugin.dll : fatal error LNK1120: 11 nicht aufgel�ste Externe [C:\*censored*\mixin_network_chat\build\windows\plugins\win_toast\win_toast_plugin.vcxproj]
Exception: Build process failed.

This is most likely related to WINRT, I did not google yet how I can install it. Sorry for my laziness.

[rekire]

I just noticed that the repo of the PR 62 was deleted. How can I checkout that PR? Was there not some kind of hidden branch?

EDIT Got it with:

git clone git@github.com:MixinNetwork/libsignal_protocol_dart.git
git fetch origin pull/62/head:example_app
git switch example_app

[Tougee]

A new branch example has been added.

@boyan01 can you help with flutter-app compilation error?

[boyan01]

This is most likely related to WINRT, I did not google yet how I can install it. Sorry for my laziness.

The same as https://github.com/MixinNetwork/flutter-plugins/issues/185 Upgrade visual studio version to latest would solve this error.