Check the price of ETH with GDAX

gdax-eth.js

// Check the price of ETH to determine how much to buy
gdaxClient.getProductTicker(
  'ETH-USD'
)
.then(data => {
  // Determine what $10 of ETH costs
  const price = (10/data.price);
  // Return smallest unit available for purchase
  const orderSize = price.toString().substr(0,10);

  // Place a buy order
  buyOrder(orderSize, data.price);
})
.catch(err => {
  // Dump the entire error and send failure notification
  console.error(err);
  sendSMS("Unable to get ETH ticker price. Response from GDAX: "+err.response.statusMessage+ ", "+err.data.message);
});