waku-react-native/example/App.js

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import * as React from 'react';
import { StyleSheet, View, Text } from 'react-native';
import {
defaultPubsubTopic,
newNode,
start,
isStarted,
stop,
peerID,
relayEnoughPeers,
listenAddresses,
connect,
peerCnt,
peers,
relayPublish,
relayUnsubscribe,
relaySubscribe,
WakuMessage,
onMessage,
StoreQuery,
storeQuery,
Config,
FilterSubscription,
ContentFilter,
filterSubscribe,
} from '@waku/react-native';
export default function App() {
const [result, setResult] = React.useState();
React.useEffect(() => {
(async () => {
const nodeStarted = await isStarted();
if (!nodeStarted) {
await newNode(null);
await start();
}
console.log('The node ID:', await peerID());
await relaySubscribe();
onMessage((event) => {
setResult(
'Message received: ' +
event.wakuMessage.timestamp +
' - payload:[' +
event.wakuMessage.payload +
']'
);
console.log('Message received: ', event);
});
console.log('enoughPeers?', await relayEnoughPeers());
console.log('addresses', await listenAddresses());
console.log('connecting...');
try {
await connect(
'/dns4/node-01.ac-cn-hongkong-c.wakuv2.test.statusim.net/tcp/30303/p2p/16Uiu2HAkvWiyFsgRhuJEb9JfjYxEkoHLgnUQmr1N5mKWnYjxYRVm',
5000
);
} catch (err) {
console.log('Could not connect to peers');
}
try {
await connect(
'/dns4/node-01.do-ams3.wakuv2.test.statusim.net/tcp/30303/p2p/16Uiu2HAmPLe7Mzm8TsYUubgCAW1aJoeFScxrLj8ppHFivPo97bUZ',
5000
);
} catch (err) {
console.log('Could not connect to peers');
}
console.log('connected!');
console.log('PeerCNT', await peerCnt());
console.log('Peers', await peers());
let msg = new WakuMessage();
msg.contentTopic = 'ABC';
msg.payload = new Uint8Array([1, 2, 3, 4, 5]);
2023-01-03 17:48:29 +00:00
msg.timestamp = new Date();
msg.version = 0;
let messageID = await relayPublish(msg);
console.log('The messageID', messageID);
// TO RETRIEVE HISTORIC MESSAGES:
console.log('Retrieving messages from store node');
const query = new StoreQuery();
query.contentFilters.push(new ContentFilter('ABC'));
const queryResult = await storeQuery(
query,
'16Uiu2HAkvWiyFsgRhuJEb9JfjYxEkoHLgnUQmr1N5mKWnYjxYRVm'
);
console.log(queryResult);
// USING FILTER INSTEAD OF RELAY:
// Instantiate the node passing these parameters:
// let config = new Config();
// config.relay = false;
// config.filter = true;
// newNode(config})
/*
const filterSubs = new FilterSubscription();
filterSubs.contentFilters.push(new ContentFilter("/toy-chat/2/luzhou/proto"))
await filterSubscribe(filterSubs, "16Uiu2HAkvWiyFsgRhuJEb9JfjYxEkoHLgnUQmr1N5mKWnYjxYRVm")
*/
// console.log("Unsubscribing and stopping node...")
// await relayUnsubscribe();
// await stop(); // TODO: This must be called only once
})();
defaultPubsubTopic().then(setResult);
}, []);
return (
<View style={styles.container}>
<Text>{result}</Text>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
alignItems: 'center',
justifyContent: 'center',
},
box: {
width: 60,
height: 60,
marginVertical: 20,
},
});