​
Get your Application Keys

Signup for CometChat and then:
  1. Create a new app
  2. Head over to the API & Auth Keys section and note the Auth Key, App ID & Region

​
Add the CometChatCalls Dependency

Install the package as NPM module: 
npm install @cometchat-pro/react-native-calls@latest --save
Then, import the CometChatCalls class wherever you want to use CometChatCalls. 
import { CometChatCalls } from "@cometchat-pro/react-native-calls";

​
Calling Component Configuration

For @cometchat-pro/react-native-calls version starting 3.0.0, please make sure you add the following additional dependencies & permissions. 
{
  "@cometchat-pro/react-native-chat": "^3.0.13",
  "@react-native-async-storage/async-storage": "^1.17.5",
  "@react-native-community/netinfo": "7.1.7", // for react-native 0.63 & above.
  "@react-native-community/netinfo": "6.1.0", // for react-native below 0.63
  "react-native-background-timer": "2.4.1",
  "react-native-callstats": "3.73.7",
  "react-native-webrtc": "^1.106.1"
}

​
Permissions:

Android: 
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
iOS: 
<key>NSCameraUsageDescription</key>
<string>This is for Camera permission</string>
<key>NSMicrophoneUsageDescription</key>
<string>This is for Mic permission</string>

​
Android:

Also in the same file in buildscript section in ext block make sure you have set minSdkVersion to 24. 
buildscript {
    ext {
        buildToolsVersion = "29.0.2"
        minSdkVersion = 24
        compileSdkVersion = 29
        targetSdkVersion = 29
    }
}

​
iOS:

Please update the minimum target version in the Podfile. Goto ./ios folder and open the Podfile. In the Podfile update the platform version to 12.0. 
platform :ios, '12.0'
Open the ios/App folder and run pod install this will create an App.xcworkspace open this and run the app.

​
Initialize CometChatCalls

The init() method initialises the settings required for CometChatCalls. The init() method takes a single paramater, that is the instance of CallAppSettingsBuilder class. The CallAppSettings class allows you to configure three settings:
  • App ID: CometChat app ID.
  • Region: The region where you app was created.
  • Host(host: string): This method takes the client URL as input and uses this client URL instead of the default client URL. This can be used in case of dedicated deployment of CometChat.
You need to call init() before calling any other method from CometChatCalls. We suggest you call the init() method on app startup, preferably in the index.js file. 
let appID = "APP_ID";
let region = "REGION";

const callAppSettings = new CometChatCalls.CallAppSettingsBuilder()
    .setAppId(appID)
    .setRegion(region)
    .build();

CometChatCalls.init(callAppSettings).then(
    () => {
        console.log('CometChatCalls initialization completed successfully');
    },
    error => {
        console.log('CometChatCalls initialization failed with error:', error);
    },
);
Make sure you replace the APP_ID with your CometChat AppID and REGION with your App Region in the above code.
ParameterDescription
callAppSettingsAn object of the CallAppSettings class