Write a PowerDNS backend that serves data from a Tor Exit List
Using one of the backends from https://doc.powerdns.com/authoritative/backends/index.html we will write a simple replacement for the TorDNSEL DNSBL service that consumes Tor Exit Lists and is not tightly coupled to the exit scanner service.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information