system_version - Hydration RPC Method

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

async function checkFleetVersions(endpoints) {
  const versions = await Promise.all(
    endpoints.map(async (endpoint) => {
      const provider = new WsProvider(endpoint);
      const api = await ApiPromise.create({ provider });
      const version = await api.rpc.system.version();
      const name = await api.rpc.system.name();
      await api.disconnect();
      return { endpoint, version: version.toString(), name: name.toString() };
    })
  );

  const unique = new Set(versions.map((v) => v.version));
  if (unique.size > 1) {
    console.warn('Version mismatch detected across fleet!');
  }

  versions.forEach((v) => {
    console.log(`${v.endpoint}: ${v.name} v${v.version}`);
  });
}

async function ensureMinVersion(api, minVersion) {
  const version = await api.rpc.system.version();
  const versionStr = version.toString();
  const [major, minor, patch] = versionStr.split('-')[0].split('.').map(Number);
  const [minMajor, minMinor, minPatch] = minVersion.split('.').map(Number);

  if (
    major < minMajor ||
    (major === minMajor && minor < minMinor) ||
    (major === minMajor && minor === minMinor && patch < minPatch)
  ) {
    throw new Error(
      `Node version ${versionStr} is below minimum ${minVersion}`
    );
  }

  console.log(`Node version ${versionStr} meets minimum ${minVersion}`);
  return true;
}

async function getNodeIdentity(api) {
  const [version, name, chain, properties] = await Promise.all([
    api.rpc.system.version(),
    api.rpc.system.name(),
    api.rpc.system.chain(),
    api.rpc.system.properties()
  ]);

  return {
    client: name.toString(),
    version: version.toString(),
    chain: chain.toString(),
    tokenSymbol: properties.tokenSymbol.toString(),
    ss58Format: properties.ss58Format.toString()
  };
}