Function parseAndRespond

packages/core/utils/src/check.js:7–22

(data, cb)

const LIVENESS_CHECK=`{"jsonrpc":"2.0","method":"web3_clientVersion","params":[],"id":42}`;

const parseAndRespond = (data, cb) => {
  let resp;
  try {
    resp = JSON.parse(data);
    if (resp.error) {
      return cb(resp.error);
    }
  } catch (e) {
    return cb('Version data is not valid JSON');
  }
  if (!resp || !resp.result) {
    return cb('No version returned');
  }
  const [_, version, __] = resp.result.split('/');
  cb(null, version);
};

const testRpcWithEndpoint = (endpoint, cb) => {
  const options = {