Blueprint Keystore

A flexible and secure keystore implementation supporting multiple key types, storage backends, and remote signing capabilities.

Features

Core Features

• std - Standard library support (default enabled)
  • Enables std-dependent functionality across all enabled features
  • Required for filesystem storage and remote signing
• no_std - No standard library support (not yet working)

Cryptographic Primitives

• ecdsa - ECDSA support using k256

  • Enables secp256k1 ECDSA keys
  • Required for EVM compatibility
  • Includes RIPEMD for address generation

• sr25519-schnorrkel - Schnorrkel/sr25519 support

  • Substrate's signature scheme
  • Used for Polkadot/Substrate chains

• zebra - Ed25519 implementation from Zebra

  • High-performance Ed25519 implementation
  • Used for Zcash compatibility

• bls381 - BLS signatures on BLS12-381

  • W3F's BLS implementation
  • Used for threshold signatures

• bn254 - BN254 curve support

  • Used for Ethereum 2.0 BLS signatures
  • Required for EigenLayer compatibility

Protocol Support

• evm - Ethereum Virtual Machine support

  • Enables ECDSA key generation and signing
  • Includes Alloy primitives for EVM compatibility
  • Required for all EVM-based chains

• tangle - Tangle protocol support

  • Includes Substrate core functionality
  • Enables BLS381 experimental features
  • Required for Tangle chain interaction

• eigenlayer - EigenLayer protocol support

  • Includes EVM compatibility
  • Enables BN254 curve support
  • Required for EigenLayer operator nodes

• symbiotic - Symbiotic protocol support

  • Basic EVM compatibility
  • Extensible for future features

Remote Signing Support

• remote - Base remote signing support

  • Required for all remote signing features
  • Enables async signing capabilities

• aws-signer - AWS KMS support

  • Sign with AWS KMS keys
  • Requires AWS credentials

• gcp-signer - Google Cloud KMS support

  • Sign with GCP KMS keys
  • Requires GCP credentials

• ledger-browser - Ledger support (browser)

  • Sign with Ledger devices in browser
  • WebUSB support

• ledger-node - Ledger support (node)

  • Sign with Ledger devices in Node.js
  • Node HID support

Feature Bundles

• tangle-full - Complete Tangle support

  • Includes tangle and bn254
  • All Tangle-specific key types

• eigenlayer-full - Complete EigenLayer support

  • Includes eigenlayer, sr25519-schnorrkel, zebra, bls381, bn254
  • All operator node key types

• symbiotic-full - Complete Symbiotic support

  • Includes symbiotic, sr25519-schnorrkel, zebra, bls381, bn254
  • All supported key types

• all-remote-signers - All remote signing capabilities

  • Includes all remote signer features
  • AWS, GCP, and Ledger support

Usage

Enable the features you need in your Cargo.toml:

[dependencies]
blueprint-keystore = { version = "0.1", features = ["std", "ecdsa", "remote", "aws-signer"] }

For full functionality:

blueprint-keystore = { version = "0.1", features = ["std", "tangle-full", "eigenlayer-full", "all-remote-signers"] }

Feature Dependencies

• aws-signer requires remote, evm, and std
• gcp-signer requires remote, evm, and std
• ledger-browser requires remote and evm
• ledger-node requires remote and evm
• eigenlayer requires evm and bn254
• tangle-full requires tangle and bn254