Implement IPNS

[dariusc93]

The base of IPNS was removed (giving some example in commits df8a12e, af7d88b, etc) leaving only dnslink portion in tack. Since libp2p have came a long way since then, we should be able to make use of DHT to put IPNS records.

• Import newer IPNS proto file
• Create functions to create, sign (both sigv1 and sigv2), encode and decode the IPNS Record (see feat: Basic record key/prefix validator and basic ipns publisher/resolver #88)
• Implement functions to publish IPNS to DHT (see feat: Basic record key/prefix validator and basic ipns publisher/resolver #88)
• Test for go-ipfs and js-ipfs interop
• Implement IPNS over Pubsub(?) - Low priority and research would be needed

Note: This will be done in a separate crate that would be imported into rust-ipfs

[iohzrd]

My app uses/bundles Kubo, but I need to switch to a pure rust implementation of IPFS so it can go mobile, etc. It relies heavily on IPNS functionality, so I'm interested in contributing to this issue. Your write up here is very helpful and should get me on the right track, but I'm curious if you have any additional info or suggestions that might help.

[dariusc93]

Hey! Thank you for your response. IPNS, to say the least, been low priority for me since I been focusing on cleaning up and improving the overall functionality before focusing on IPNS (which i will say may be able to solve some of the things I use this project for too). As to when I will actually get to IPNS is hard to say, especially since I do need to review changes made in rust-libp2p again from libp2p/rust-libp2p#2712 to make sure im understanding the API changes.

At this time, however, I dont have any additional info for this. Regardless, all contributions are welcome. If you do have questions feel free to ask!