Kraken API AssetPairs

Question

I am consuming the Kraken API, and I am not able to find a good explanation to the info I have in the response.

Actually, for a given pair, I have the following info:

altname             = alternate pair name
aclass_base         = asset class of base component
base                = asset id of base component
aclass_quote        = asset class of quote component
quote               = asset id of quote component
lot                 = volume lot size
pair_decimals       = scaling decimal places for pair
lot_decimals        = scaling decimal places for volume
lot_multiplier      = amount to multiply lot volume by to get currency volume
leverage_buy        = array of leverage amounts available when buying
leverage_sell       = array of leverage amounts available when selling
fees                = fee schedule array in [volume, percent fee] tuples
fees_maker          = maker fee schedule array in [volume, percent fee] tuples (if on maker/taker)
fee_volume_currency = volume discount currency
margin_call         = margin call level
margin_stop         = stop-out/liquidation margin level

I have some questions about this payload. Thanks to everyone who will help.

1. lot_decimals and pair_decimals: how do these apply ? I am guessing that maybe the former means that the quantity of the first currency can be represented with a maximum of lot_decimals decimals, with the latter meaning that you can represent the pair value with a maximum of pair_decimals decimals. Is this any reasonable ?

2. lot_multiplier: the explanation is clear, but it's always 1. Any reason for this being there ?

3. lot: is this the amount of first currency that you want to calculate in the second currency ? Example: 100 EURBTC, 100 is the lot size ?

Thanks

Answer 1

I copied this over from inside the question by @Bruno Ripa:

I had feedback from Kraken. It is:

1. lot_decimals is the maximal precision of order size (volume), which is in base currency. pair_decimals is price precision
2. lot_multiplier is unused at the moment.
3. lot: pair is BTC/EUR, the volume of 100 is denominated in BTC, which is a base currency