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 # Sylk Mobile
 
 Sylk Mobile is part of Sylk Suite, a set of real-time communications
 applications using IETF SIP protocol and WebRTC specifications.  
 
 Sylk Suite consists of:
 
 * SIP/WebRTC application server
 * Mobile push notifications server
 * Desktop clients for Windows, Linux and MacOS
 * Mobile clients for Apple iOS and Google Android
 * Web page for WebRTC enabled browsers
 * Mobile client development SDK
 * Desktop client development SDK
 
 [Home page](https://sylkserver.com)
 
 
 ## License
 
 Sylk mobile licensed under GNU General Public License version 3.  A copy of
 the license is available at http://www.fsf.org/licensing/licenses/gpl-3.0.html
 
 Copyright 2020 [AG Projects](https://ag-projects.com)
 
 
 ## Availability
 
 * [Google Play](https://play.google.com/store/apps/details?id=com.agprojects.sylk)
 * [Apple Store](https://apps.apple.com/us/app/id1489960733)
 * Source code
 
 
 ## Features
 
 * 1-to-1 audio and video calls
-* Text messaging
-* Multiparty video conferencing
+* Encrypted end-to-end messaging
+* Synchronization of multiple devices 
+* Multiparty conferencing
 * Call history entries management
 * Native address book lookup
-* Wake up from sleep
 * Native OS telephony integration
-* Deep links OS integration
+* Support for multiple devices in parallel
 * Support for multiple cameras
 * Support for landscape and portrait modes
-* Support for tablet and phone sizes
-* Supports CallKeep for iOS >=13
-* Supports Telecom connection service for Android
+* Support for tablets and phones
 * Interoperable with SIP clients
+* Receive calls from the web
+
+Messages are encrypted end-to-end using OpenPGP.
 
 
 ## Credits
 
 ### Financial support
 
 * NGI0 PET Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 825310
 * [Project description](https://nlnet.nl/project/SylkMobile/)
 
 
 
 ### People
 
 * Saúl Ibarra Corretgé - Inception architect / original idea
 * Tijmen de Mes - API, Conference and desktop
 * Dan Jenkins - WebRTC and React Native mechanic
 * Adrian Georgescu - Janitor
 * Bibiana Rivadeneira - Push notifications
 * Michiel Leenaars - Strategic guidance
 
 
 ## Running dependencies
 
 * Sylk Server
 * Sylk Pushserver
 * SIP infra with push notifications support
 
 ## Demo client
 
 
 * [OpenSIPS](https://opensips.org) server software 
 * [SIP2SIP](https://sip2sip.info) public infrastructure
 * [Janus](https://github.com/meetecho/janus-gateway) Gateway
 
 
 ## Getting Started
 
 ### Building ependencies
 
 * Node.js version 12
 * NVM
   https://heynode.com/tutorial/install-nodejs-locally-nvm/
 * Yarn (for package management)
   curl -o- -L https://yarnpkg.com/install.sh | bash 
 * GPG (for git-crypt)
 * Git-Crypt (for keeping a google upload key keystore secret)
 * XCode
 * Android Studio (Or at least the Android SDK)
 * Gem (for installing gem files)
 * Fastlane (for deploying to testflight/google play store)
 * Cocoapods (for handling iOS Pods) 
   - Install RVM: curl -L https://get.rvm.io | bash -s stable
   - Update ruby: rvm install rvm install ruby
   - Add LC_ALL="en_US.UTF-8" to .bach_profile
   - sudo gem install cocoapods
 * watchman (for helping watch files during development)
   brew install watchman or port install watchman
 
 
 ### Install
 
 Follow the [Getting Started
 guide](https://facebook.github.io/react-native/docs/getting-started) as much
 as you can but not everything will be explained.  No install docs will be
 listed here for each tool as they'll change, go and check them out yourself.
 
 ### Updating the app
 
 Yarn can be a bit of a pain, especially when a git dependency changes.
 
 To be sure you're running the lastest code run:
 
 ```bash
 rm -rf node_modules
 rm -rf ios/Pods
 yarn cache clean
 yarn
 cd ios; pod install; cd ..
 ```
 
 
 ### XCODE 12.5 fixes
 
 1. https://infinitbility.com/build-failed-after-update-xcode-12.5
 
 2. https://github.com/foundation/foundation-cli/issues/98
 
 npm rebuild node-sass
 
 3. https://github.com/facebook/create-react-app/issues/4540
 
 brew install watchman or port install watchman
 
 
 
 ### Decrypting the git repo
 
 Run `git-crypt unlock` to check that you can decrypt the files in the repo. If you can't you'll need to generate a GPG key and pass it to someone with access to the repo. A good guide is located at https://medium.com/@sumitkum/securing-your-secret-keys-with-git-crypt-b2fa6ffed1a6
 
 ### Running the app
 
 Use `react-native run-ios --help` and `react-native run-android --help` to give you all you need to know. You shouldn't ever have to build from Xcode or Android Studio.
 
 ### Running on the iOS Simulator
 
 Currently we have issues running a build of ios from the cli using `yarn react-native run-ios` so instead, open up xcode and run it there
 
 ```bash
 open ios/sylk.xcworkspace/
 ```
 
 ### Running on the Android Simulator or device
 
 If you don't have any simulators running, and don't have an android device plugged in (or available to adb) React Native will start up a simulator for you. If you have a device available (doesn't matter if its real or a simulator) this command will output to the device.
 
 ```bash
 yarn react-native run-android
 ```
 
 ### Debugging
 
 Install https://reactnative.dev/docs/debugging#react-developer-tools
 
 Shake the device and touch Debug.
 
 
 ### Running on the iOS Device
 
 Currently we have issues running a build of ios from the cli using `yarn react-native run-ios --device` so instead, open up xcode and run it there
 
 ### Running on a specific Android Device
 
 ```bash
 yarn react-native run-android --deviceId "DeviceId"
 ```
 
 >   --deviceId [string] builds your app and starts it on a specific device/simulator with the given device id (listed by running "adb devices" on the command line).
 
 
 ### Running without debugging
  
 To run the app on your device without tethering it to USB:
 
 On Android:
 
 ```bash
 yarn react-native run-android --variant=release
 
 ``` 
 On iOS:
 
 Select menu Product -> Scheme -> Edit scheme andselect for Run Build Configuration = Release
 
 Beware that iOS push tokens are still meant for sandbox unless the app is
 released through Apple Store.
 
 ### Clean the project
 
 You might want to bring the project back to a clean repo if you're hitting any issues.
 
 Try it as a dry-run first
 
 ```bash
 git clean -d -x --dry-run
 ```
 
 ```bash
 git clean -d -x -f
 ```
 
 ### Building the app for deployment
 
 We use `fastlane` for building production versions of the app.
 
 Fastlane can handle all the metadata around your entry into the relevant App Stores and much much more too.
 
 Currently we have two commands - you will need to open Xcode and allow it to sync the deployment key as we allow Xcode to control that rather than do it ourselves. We could add it directly into the project with git-crypt and tell fastlane to use it to make this easier.
 
 ```bash
 fastlane ios beta
 ```
 
 ```bash
 fastlane android beta
 ```
 
 ### Patches
 
 We utilise the [patch-package](https://www.npmjs.com/package/patch-package) module in order to patch the `react-native-callkeep` module instead of maintaining a complete fork. See their README on how to make changes to the patch and how those patches get installed automatically within this project on install of npm modules.
 
 ### Update sylkrts.js
 
 yarn add -D AGProjects/sylkrtc.js
 
 ### Firebase notifications reference
 
 https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages#AndroidNotification