getStakingData.ts

/*
  Simple code snippet to fetch parachain staking related data using 
  Polkadot.js API - Not to be used in production
  Use at your own discretion
*/
import { ApiPromise, WsProvider } from '@polkadot/api';
import yargs from 'yargs';

// Get input arguments
const args = yargs.options({
  network: { type: 'string', demandOption: true, alias: 'n' },
}).argv;

// Create Provider
let wsProvider;
if (args['network'] === 'moonbeam') {
  wsProvider = new WsProvider('wss://wss.api.moonbeam.network');
} else if (args['network'] === 'moonriver') {
  wsProvider = new WsProvider('wss://wss.api.moonriver.moonbeam.network');
} else {
  console.error('Network not supported');
  process.exit();
}

const main = async () => {
  // Wait for Provider
  const api = await ApiPromise.create({
    provider: wsProvider,
  });
  await api.isReady;

  // Get the list of active collators
  const collatorList: any = (await api.query.parachainStaking.selectedCandidates()).toJSON();

  // Get details of each collator
  for (let i = 0; i < collatorList.length - 1; i++) {
    console.log(`\n Collator: ${collatorList[i]}`);
    const collatorData = await api.query.parachainStaking.candidateInfo(collatorList[i]);
    console.log(collatorData.toHuman());
  }

  await api.disconnect();
};

main();