Purchases less than $1 cannot be refunded

[mikkoasis]

PHP-Library/FatZebra.class.php

Line 142 in 4b426eb

if(intval($amount) < 1) throw new \InvalidArgumentException("Amount is invalid - must be a positive value");

[chrisaligent]

Confirmed, even in the latest version of this package the conversion from dollars to cents (floatToInt()) takes place after the check, so $amount is still in dollars.