Add bls12381 support

[freddiecoleman]

Currently waiting on https://github.com/coinbase/kryptology/pull/48

Motivation

This allows Rosetta users to sign and verify payloads using a bls12381 curve type.

It supports both basic and aug with prefix by passing in the relevant signature type.

In order to prepend sign using aug you will need to manually prepend the relevant public key to the payload that is to be signed as the exported interface does not allow an additional argument for the public key.

Solution

Provide an implementation of the Signer interface for bls12381

Open questions

• It looks like the build/pipeline pulls a JSON file containing the specification and the bls12381 curve type will not currently be in there. I believe adding the necessary support will require a further PR somewhere else - this should be quite simple?

[shrimalmadhur]

Motivation

This allows Rosetta users to sign and verify payloads using a bls12381 curve type.

It supports both basic and aug with prefix by passing in the relevant signature type.

In order to sign using aug you will need to prepend the relevant public key to the payload that is to be signed as the exported interface does not allow an additional argument for the public key.

Solution

Provide an implementation of the Signer interface for bls12381

Open questions

• It looks like the build/pipeline pulls a JSON file containing the specification and the bls12381 curve type will not currently be in there. I believe adding the necessary support will require a further PR somewhere else - this should be quite simple?

Hello @freddiecoleman - you need to make specifications changes here - https://github.com/coinbase/rosetta-specifications You can use https://github.com/coinbase/rosetta-specifications/pull/93 as sample.