App.js

import React from 'react';
import {NativeModules, NativeEventEmitter, Button, View} from 'react-native';

const {GetID} = NativeModules;
const GetIDEmitter = new NativeEventEmitter(GetID);
GetIDEmitter.addListener('GetIDEvent', (body) => console.log(body));

const VerifyButton = () => {
  // Note: Don't use your SDK key in the client-side code in the production environment.
  const apiUrl = 'API_URL';
  const sdkKey = 'SDK_KEY';
  const flowName = 'getid-doc-selfie';

  const getToken = () => {
    return fetch(apiUrl + '/sdk/v2/token', {
      method: 'POST',
      headers: {
        Accept: 'application/json',
        'Content-Type': 'application/json',
        'x-sdk-key': sdkKey,
      },
    });
  };

  const onPress = () => {
    getToken()
      .then((response) => response.json())
      .then((json) => {
        GetID.start(apiUrl, json.token, flowName);
      });
  };

  return (
    <View
      style={[
        // eslint-disable-next-line react-native/no-inline-styles
        {
          marginLeft: 20,
          marginTop: 100,
          marginRight: 20,
          backgroundColor: 'white',
        },
      ]}>
      <Button title="Verify me!" color="blue" onPress={onPress} />
    </View>
  );
};

export default VerifyButton;