EPIC: Keyring refactor

[JulianToledano]

As we talked in #14473 the main goal will be to have keystone working and integrated in the sdk.

To do so, here is the list of future works:

Phase 1: current keyring small refactors

• Use cockroachdb/errors instead of the deprecated github.com/cosmos/cosmos-sdk/types/errors Refactor of erros in keyring #14970
• Define errors as variables Refactor of erros in keyring #14970
• Style changes Refactor of erros in keyring #14970
• Create unit/integration test and add them to CI Refactor of keyring tests #14976

Phase 2: Maintein keystone

• Fix and maintain keystone
  • Have a working release
  • Define an interface that facilitates the development and integration of different backends
  • Implement the same backends already supported in the current keyring
  • Add unit/integration tests

Phase 3: Integrate on the sdk

• Integrate keystone on the sdk along side with the current keyring
• Replace the current keyring for keystone to remove the dependency with 99desings

[tac0turtle]

• Use cosmossdk.io/errors instead of the deprecated github.com/cosmos/cosmos-sdk/types/errors

for this one we can try using cockroachdb/errors instead of our library as it provides some extra functionality

[jackzampolin]

Have we looked into using the hashicorp plugins here?

[tac0turtle]

yup yup, zondax is working on a design doc

[JulianToledano]

Hi @tac0turtle @jackzampolin

I have been working on a Proof of Concept for a keyring that leverages HashiCorp plugins over gRPC. The code for this POC can be found in this repository.

In this POC, the keyring fulfills the Cosmos keyring interface, but only the methods for creating keys, retrieving keys, and signing messages have been implemented.

There are two plugins available: one written in Go and the other in Python. Both plugins are functional, and I have successfully used them to send some ATOM.

I have encountered some issues while working on it, which are explained in the readme. Could you take a look at the code and share your thoughts, as well as any suggestions for next steps.

[JulianToledano]

closing this in favor of #16637 once the ADR is approved we can create the related tasks