What is ed25519 used for?

[JustinDrake]

During the technical call @cpacia mentioned that OpenBazaar will be moving away from RSA crypto, and use ed25519 instead. This brings a number of improvements, including safer crypto, faster identity key generation, and the replacement of certain signatures with HMACs for better deniability.

While libp2p-crypto supports ed25519, it looks like [libp2p-secio still doesn't](ipfs/kubo#3625 (comment). Did I misunderstand that OpenBazaar will use ed25519 for fast identity key generation?

[cpacia]

As far as I can tell the secio uses the libp2p-crypto key interface for which there is an implementation of ed25519. @whyrusleeping can maybe confirm.

[JustinDrake]

See response here.