feat(sdk-lib-mpc): Added EdDSA DKG multi-party schnorr Impl

[sasikumar-bitgo]

Description

This pull request adds EdDSA multi-party schnorr Distributed Key Generation (DKG) support to the BitGoJS SDK, specifically within the sdk-lib-mpc module.
It introduces new dependencies for Silence Laboratories' EdDSA WASM libraries, implements the EdDSA DKG protocol for multi-party threshold key generation, and provides supporting types and utility functions.
The PR also includes comprehensive unit tests that cover key share generation, deterministic and random seeding, and utility behaviors.

Issue Number

TICKET: WP-6122

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Unit Testing

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My code compiles correctly for both Node and Browser environments
• I have commented my code, particularly in hard-to-understand areas
• My commits follow Conventional Commits and I have properly described any BREAKING CHANGES
• The ticket or github issue was included in the commit message as a reference
• I have made corresponding changes to the documentation and on any new/updated functions and/or methods - jsdoc
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[Copilot]

Pull Request Overview

This pull request adds EdDSA multi-party Schnorr Distributed Key Generation (DKG) support to the BitGoJS SDK's sdk-lib-mpc module, enabling threshold key generation using Silence Laboratories' EdDSA WASM libraries.

Key changes:

• Introduces EdDSA DKG protocol implementation with support for 3-party, threshold-2 key generation
• Adds comprehensive utility functions for key share management and byte concatenation
• Includes extensive unit tests covering deterministic/random seeding, session management, and protocol execution

Reviewed Changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
modules/sdk-lib-mpc/src/tss/eddsa-mps/dkg.ts	Core DKG class implementing the EdDSA multi-party Schnorr protocol
modules/sdk-lib-mpc/src/tss/eddsa-mps/types.ts	Type definitions for EdDSA key shares and WASM module interfaces
modules/sdk-lib-mpc/src/tss/eddsa-mps/util.ts	Utility functions for byte concatenation and key share processing
modules/sdk-lib-mpc/src/tss/eddsa-mps/index.ts	Module exports for EdDSA MPS functionality
modules/sdk-lib-mpc/src/tss/index.ts	Added export for eddsa-mps module
modules/sdk-lib-mpc/package.json	Added dependencies for Silence Laboratories EdDSA WASM libraries
modules/sdk-lib-mpc/test/unit/tss/eddsa/dkg.ts	Comprehensive unit tests for DKG protocol execution
modules/sdk-lib-mpc/test/unit/tss/eddsa/eddsa-utils.ts	Unit tests for utility functions
modules/sdk-lib-mpc/test/unit/tss/eddsa/util.ts	Test utility for generating EdDSA DKG key shares

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[pranavjain97]

Nice work! You have a typo on eddsa-mps -> eddsa-mpc.

[pranavjain97]

when would it be in this state? is it needed?

[sasikumar-bitgo]

When the DKG class instance is created.

[sasikumar-bitgo]

Nice work! You have a typo on eddsa-mps -> eddsa-mpc.

It was intentional MPS (multi party schnorr)