I can't believe I'm saying this about a domain name registering website, but I actually enjoy buying domains through porkbun.
There are no refunds on Handshake domains. No exceptions. Don't even ask. Seriously.
Handshake is an experimental and permissionless naming protocol that uses blockchain technology to create a decentralized root zone, as opposed to a centralized root zone regulated by ICANN. You can read more about the Handshake protocol at handshake.org
There are no guarantees with Handshake domains. You may not be able to renew Handshake domains upon expiration and, although the chances are very small, there's a chance that the TLD you purchase the domain on top of could stop functioning prior to expiration.
Because Handshake domain names do not use the same root zone as other domains on the internet they do not currently resolve like normal domains, they require special browser plugins or network configurations. Furthermore, Porkbun services such as email and SSL certificate generation don't work on Handshake domains.
WARNING: This site has been known to cause a mind blowing experience. We recommend you prepare yourself mentally and if possible be sitting down. Side effects may include saving money, letting out a chuckle, and sporadic oinking.