The API call abf_policy_dump returns next hop IP address in every FibPath as a byte array with length=16 (as usually), however, the first byte has value either 1 or 2 (according to my testing, it depends whether it is IPv4 or IPv6 address) and rest of the array is the actual IP address.

This is harder to parse since the IP is "shifted", but most importantly an IPv6 address cannot be parsed at all since it misses the last byte.