did:pkh - Public Key Hash DID method

[clehner]

Implement #123

Depends on #133

• Add DID method skeleton
• Decide on DID format. Decided: it will be like did:pkh:tz:…, did:pkh:eth:…, did:pkh:btc:…
• Enable proof types used with did:tz
• Test DID resolution
• Test LD-Proofs
• DID generation from JWK? For didkit key-to-did: would need a way to indicate the pkh subtype.
• Support addresses for Tezos and Ethereum
• Support Bitcoin addresses
• Represent Solana addresses? Yes, they appear to use the identity hash. Note: verifying SolanaMethod2021 is not yet implemented.
• Support blockchainId property
• Support Dogecoin addresses

[wyc]

IMO, we can reasonably claim that Solana uses the identity hash function.

[wyc]

This is looking great. Could we also add support for dogecoin?

[ChristopherA]

I’d love to see support for did:onion. We already have a working server at http://fscst5exmlmr262byztwz4kzhggjlzumvc2ndvgytzoucr2tkgxf7mid.onion/ and example but real did:onion did document at http://fscst5exmlmr262byztwz4kzhggjlzumvc2ndvgytzoucr2tkgxf7mid.onion/.well-known/did.json

Code for server at: https://github.com/BlockchainCommons/torgap-demo

Basically did:onion uses 25519 keys but encoded in the onion address url rather than base64 or hex, can work like did:key or did:web, but has the advantage of no dns and no correlation of either the client or server. Getting the current did:document also serves as proof of control of the private key as you can’t receive it over the onion protocol unless you control it.

We also have a Open Time Stamp service available at , which can serve as a proof of existence on a particular date for did:documents or VCs. http://3xcaaswwserqnox56z7d7wifwyxm2jsdv4fniffym5jwncqx3qr7uzid.onion/

/cc @gorazdko

[clehner]

@wyc yes, we can add a pkh:doge.

@ChristopherA thanks for the info; I've opened a new issue to track did:onion: #134

[wyc]

@clehner did you want to squash your fixups prior to commit? Otherwise I will merge tomorrow evening ET. Thanks!

[clehner]

@wyc I will rebase and squash these changes shortly.

[clehner]

Squashed related commits, rebased, and updated changelog.

Edit: CI failed due to #150

[clehner]

Rebased

[clehner]

Merged.