findPeer.js

#!/usr/bin/env node

// requires installing node-fetch `npm install node-fetch`
const fetch = require('node-fetch');

const myNodeId = 'NodeID-Hdc3Czu3AzW5rHvSAyLztNevu6bDNoKqo';

async function main() {
    const body = `{
    "jsonrpc":"2.0",
    "id"     :1,
    "method" :"info.peers",
    "params": {
        "chain":"2hUULz82ZYMKwjBHZybVRyouk38EmcW7UKP4iocf9rghpvfm84"
    }
}`;
   
    const response = await fetch('http://127.0.0.1:9650/ext/info', {
        method: 'post',
        body: body,
        headers: {'Content-Type': 'application/json'}

    })
    const myNode = (await response.json())['result']['peers'].find(p => p['nodeID'] == myNodeId);
    if (myNode) {
        console.log(`Success! Found node ${myNodeId}`);
    } else {
        console.log(`Failed: Node ${myNodeId} not found`);
    }
    
}


main().catch((e) => {
  console.error(e);
  process.exit(1);
});