No fingerprint function implemented for secp256k1-verification-key-2019

[wip-abramson]

I am attempting to use the secp256k1-verification-key-2019 library with Digital Bazaar's DID Key driver - https://github.com/digitalbazaar/did-method-key

When attempting to covert a generated keypair into a DID Document I run into the following error:

Error: Abstract method, must be implemented in subclass.
    at EcdsaSecp256k1VerificationKey2019.fingerprint

I believe it should be fairly easy to add this function.

Alternatively, could you point to examples that takes a secp key and converts to its did-key based DID doc?

[djvs]

Hi @wip-abramson - not sure this is a covered use case. Our libraries are based on did:elem and I believe the DID document functionality is exposed via the elem-did-legacy-non-anchored library.

[wip-abramson]

Ah I see, so if I wanted to support this I should fork the repo, add the functionality and create my own library?

[djvs]

I'm not entirely sure what the intended functionality is - you're welcome to submit a PR.

[wip-abramson]

Thanks, I will have a go. I just want to be able to use this library with the did key driver from digital bazaar.

[djvs]

Also, re: "converting secp key to did-key based DID doc" - the element DID docs we're creating are actually based on multiple keys (a primary and a recovery).

[djvs]

It's very straightforward to actually generate a DID doc if you have two keys. It basically boils down to taking apart the DID document, which is basically recursively nested base64 strings with JSON at different levels, take a look for yourself.