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App.js
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/**
* Sample React Native App
* https://github.com/facebook/react-native
*
* @format
* @flow
*/
import React, { useEffect, useState, Fragment } from 'react';
import { StyleSheet, View, Text } from 'react-native';
import { Colors } from 'react-native/Libraries/NewAppScreen';
import { Keyring } from '@polkadot/keyring';
import { mnemonicGenerate, cryptoWaitReady } from '@polkadot/util-crypto';
const App = () => {
const [info, setInfo] = useState({});
useEffect(() => {
cryptoWaitReady().then(() => {
try {
const keyring = new Keyring({ type: 'sr25519' });
const phrase = mnemonicGenerate(12);
const { address, type } = keyring.createFromUri(phrase);
setInfo({ address, phrase, type });
} catch (error) {
console.error(error.message)
}
});
}, []);
return (
<Fragment>
<View style={styles.body}>
<View style={styles.sectionContainer}>
<Text style={styles.sectionTitle}>phrase</Text>
<Text style={styles.sectionDescription}>
{info.phrase || '<unknown>'}
</Text>
</View>
<View style={styles.sectionContainer}>
<Text style={styles.sectionTitle}>address</Text>
<Text style={styles.sectionDescription}>
{info.address || '<unknown>'}
</Text>
</View>
<View style={styles.sectionContainer}>
<Text style={styles.sectionTitle}>type</Text>
<Text style={styles.sectionDescription}>
{info.type || '<unknown>'}
</Text>
</View>
</View>
</Fragment>
);
};
const styles = StyleSheet.create({
scrollView: {
backgroundColor: Colors.lighter,
},
engine: {
position: 'absolute',
right: 0,
},
body: {
backgroundColor: Colors.white,
},
sectionContainer: {
marginTop: 32,
paddingHorizontal: 24,
},
sectionTitle: {
fontSize: 24,
fontWeight: '600',
color: Colors.black,
},
sectionDescription: {
marginTop: 8,
fontSize: 18,
fontWeight: '400',
color: Colors.dark,
},
highlight: {
fontWeight: '700',
},
footer: {
color: Colors.dark,
fontSize: 12,
fontWeight: '600',
padding: 4,
paddingRight: 12,
textAlign: 'right',
},
});
export default App;