author_pendingExtrinsics - Kusama RPC Method

import { ApiPromise, WsProvider } from '@polkadot/api';

async function monitorPool(api, interval = 6000) {
  let previousCount = 0;

  setInterval(async () => {
    const pending = await api.rpc.author.pendingExtrinsics();
    const count = pending.length;

    if (count !== previousCount) {
      console.log(`Pool size changed: ${previousCount} -> ${count}`);

      if (count > 100) {
        console.warn('High pool activity detected!');
      }
    }

    // Analyze pending extrinsic types
    const byPallet = {};
    pending.forEach((ext) => {
      const key = `${ext.method.section}.${ext.method.method}`;
      byPallet[key] = (byPallet[key] || 0) + 1;
    });

    if (Object.keys(byPallet).length > 0) {
      console.log('Pending by type:', byPallet);
    }

    previousCount = count;
  }, interval);
}

async function verifyInPool(api, txHash) {
  const pending = await api.rpc.author.pendingExtrinsics();

  const found = pending.find((ext) => ext.hash.toHex() === txHash);

  if (found) {
    console.log(`Transaction ${txHash} is in the pool`);
    console.log(`  Call: ${found.method.section}.${found.method.method}`);
    return true;
  }

  console.log(`Transaction ${txHash} not found in pool (may already be included)`);
  return false;
}

async function analyzeCongestion(api) {
  const pending = await api.rpc.author.pendingExtrinsics();

  const tips = pending.map((ext) => ext.tip.toBigInt());
  const totalTips = tips.reduce((sum, tip) => sum + tip, 0n);
  const avgTip = tips.length > 0 ? totalTips / BigInt(tips.length) : 0n;
  const maxTip = tips.length > 0 ? tips.reduce((a, b) => (a > b ? a : b), 0n) : 0n;

  return {
    poolSize: pending.length,
    averageTip: avgTip.toString(),
    maxTip: maxTip.toString(),
    congested: pending.length > 50
  };
}