It includes a Pow Pub Client, which lets you buy the mining of Nostr vanity pubkeys. Similar to rana, but someone else does the mining.

Here's a demo: https://oak-node.net/wiki?name=demo-powpub-client

Pow Pub is a decentralized protocol where buyers and sellers coordinate over Nostr. The mined keys are of course only known to the Client who paid for them. Anyone can join either as a Client to buy vanity pubkeys, or as a Provider to mine them.