With the Python, what is the decimal precision required for volume and price on Kraken's REST API?

Question

I want to use Python to interact with the Kraken REST API (https://support.kraken.com/hc/en-us/articles/360025180232-REST-API-command-line-client-Python-#python). I'm US-based. I was trying to figure out what kind of decimal precision I would need for a "ETHUSD" pair,

$ ./krakenapi AddOrder pair=ETHUSD type=sell ordertype=limit price=1.00 volume=50 oflags=post

however, when I query

https://api.kraken.com/0/public/AssetPairs

I do not see this pair listed. What kind of precision (decimal places) would be required or is it not possible to trade ETHUSD within Kraken's REST API?

Answer 1

ETHUSD is listed as an altname in the AssetPairs query you mentioned, under the id/key of XETHZUSD, with a price decimal precision of 2 as shown in the pair_decimals key:

"XETHZUSD":{"altname":"ETHUSD","wsname":"ETH/USD","aclass_base":"currency","base":"XETH","aclass_quote":"currency","quote":"ZUSD","lot":"unit","cost_decimals":5,"pair_decimals":2,...

This means you can place an order of 1600.01 USD but not 1600.001 USD for the ETHUSD pair.

For more information, please read the Kraken's documentation on Price decimal precision.