When I tried to use the transfers method to get transfer rates. I got an undefined 0 index error.
I traced the issue to line 155 in the KingFlamez\Rave\Helpers\Transfers class
$transfer['data'] = $transfer['data'][0];
The above code was the culprit.
I had to create a copy of this class and comment out the offending line to get the code to work.
I suggest that you remove this line of code. Thank you.