Noosphere Client for ROAST Threshold Signatures

This Dart library provides a Client class to communicate with a Noosphere coordinator server for the generation of FROST keys and Taproot Schnorr threshold signatures using coordinated Distributed Key Generation and ROAST.

This allows generation of one or more m-of-n threshold keys for a group of participants given by a GroupConfig. Clients can request new DKGs or signatures from the group, and may accept or reject requests made by others.

Consumers of the library should usually use the high-level Client class. The login() method allows a client to login with a given ClientConfig and ClientStorageInterface with a getter function to obtain the client's private key. The GrpcClientApi can be used as an ApiRequestInterface to communicate with a coordinator server over gRPC.

The server and the Client class tests are not included under this repository. The Client class integration with the server is tested elsewhere.

Installation

To use the library, the underlying frosty package requires the associated native library which can be built from the frosty repository using Podman or Docker. Linux and Android builds are supported and require placing the libraries in the necessary location. Please see the frosty README.md.

Libraries

common

internals

Provides access to internal client state for testing purposes only. Not guaranteed to be stable.

noosphere_roast_client

pbgrpc