How to building React Native App using WebRtc

Thank you for your help in advance.

I want to make a new WebRtc mobile application for video calling using react native, i checked many articles but not getting exact information how to start. Can any person please help me and guide me the path to create an application.

.\gradlew /clean

FAILURE: Build failed with an exception.

• Where:Build file 'C:\Jig\New folder\react-native-demoapp-master\react-native-demoapp-master\node_modules\react-native-webrtc\android\build.gradle' line: 30

• What went wrong:A problem occurred evaluating project ':WebRTCModule'.

  Could not find method implementation() for arguments [com.facebook.react:react-native:+] on project ':WebRTCModule'.

• Try:Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 2.903 secs