Retrieves interest rate value for requested period. Applicable only for PERPETUAL instruments.
Instrument name Unique instrument identifier
"BTC-PERPETUAL"
The earliest timestamp to return result from (milliseconds since the UNIX epoch) The timestamp (milliseconds since the Unix epoch)
1536569522277
The most recent timestamp to return result from (milliseconds since the UNIX epoch) The timestamp (milliseconds since the Unix epoch)
1536569522277