Rocket.Chat.ReactNative/app/containers/MessageBox/EmojiKeyboard.js

import React from 'react';
import { View } from 'react-native';
import { KeyboardRegistry } from 'react-native-keyboard-input';

import store from '../../lib/createStore';
import EmojiPicker from '../EmojiPicker';
import styles from './styles';

export default class EmojiKeyboard extends React.PureComponent {
	constructor(props) {
		super(props);
		const state = store.getState();
		this.baseUrl = state.settings.Site_Url || state.server ? state.server.server : '';
	}

	onEmojiSelected = (emoji) => {
		KeyboardRegistry.onItemSelected('EmojiKeyboard', { emoji });
	}

	render() {
		return (
			<View style={styles.emojiKeyboardContainer} testID='messagebox-keyboard-emoji'>
				<EmojiPicker onEmojiSelected={emoji => this.onEmojiSelected(emoji)} baseUrl={this.baseUrl} />
			</View>
		);
	}
}
KeyboardRegistry.registerKeyboard('EmojiKeyboard', () => EmojiKeyboard);