@gateway.fm/gtw-dvf-client-js/src/lib/validators/starkPrivateKey.js

DVF client js lib with gateway.fm rpc endpoints

const DVFError = require('../dvf/DVFError')

module.exports = (dvf, tradingKey) => {
  if (!tradingKey) {
    throw new DVFError('ERR_STARK_PRIVATE_KEY_MISSING')
  }
}