How to properly get decimal precision for Quantity for a Symbol?

daimyo · March 20, 2021, 10:52am

I would like to get the number of decimal places for a symbol that can used for Spot trading like in the example below.

The Amount/Quantity is 0.074 which would be 3 decimal places.

I believe in order to get the precision you would use the Lot Size Filter using the StepSize. If that is correct then the json below is taken from the Exchange Info for BNBUSDT. It shows two decimal places for the Step Size but in the Binance UI it can have 3 decimal places? Is it possible the Exchange Info on the TestNet is incorrect?

      "lotSizeFilter": {
        "minQuantity": 0.01,
        "maxQuantity": 9000,
        "stepSize": 0.01,
        "filterType": 3
      }

MJW · March 20, 2021, 10:48pm

Try https://api.binance.com/api/v3/exchangeInfo and get LOT_SIZE for quantity precision

daimyo · March 21, 2021, 12:41am

Great thank you for the confirmation. Just sharing for the benefit of others.

The Test API can have different settings for the LOT_SIZE.

Left side is result from the Test API and on the right is Live API.