Scalar Core

Scalar Core is a blockchain interoperability network that enables seamless asset transfers between Bitcoin and other chains. Built on top of the Cosmos SDK, Scalar introduces specialized modules for managing cross-chain assets and protocols.

Overview

Scalar serves as a decentralized bridge between Bitcoin and various EVM chains and non-EVM chains in the future, providing secure and efficient cross-chain communication. The network utilizes a validator set to manage assets and sign transactions across different chains.

Key Features

• Bitcoin to EVM bridge functionality
• Multi-chain support for EVM-compatible networks
• Secure multi-signature schemes (Schnorr for BTC, ECDSA for EVM)
• Protocol-level asset management
• Covenant-based custody system

Core Modules

🌟 Covenant Module

Manages the secure custody of user assets across Bitcoin and EVM chains:

• Custodian management system
• Transaction signing for BTC unstaking
• EVM transaction signing for staking operations
• Asset security and management

🌟 Protocol Module

Acts as the service layer for managing staking operations:

• ERC20 token management for BTC staking
• Protocol information storage on Scalar network
• Cross-chain communication coordination

🌟 EVM ERC20 Tokens Module

Handles the deployment and management of ERC20 tokens across EVM chains:

• Multiple token deployment capability per chain
• Configuration for:
  • Bitcoin source network (testnet4, mainnet, regtest)
  • Protocol identity (protocol pubkey)
  • Covenant management settings

🌟 Bitcoin Module

Provides Bitcoin network integration:

• Transaction verification
• Transaction validation
• Confirmation management
• Bitcoin network state tracking

🌟 Multisig Module

Implements secure multi-signature schemes:

• EVM: ECDSA multisig with weighted signatures
• BTC: Schnorr multisig with Taproot support
• Validator coordination for transaction signing

Prerequisites

• Go 1.23+
• Rust 1.82+
• Docker

Building

make build

Running

make start

Docker

Building Docker Images

make docker-image

Running Docker Container

make docker-run

Development Setup

1. Clone the repository:

git clone https://github.com/scalarorg/scalar-core.git
cd scalar-core

2. Install dependencies:

make prereqs

3. Generate protocol buffers:

make proto-gen

4. Build Docker Image:

make docker-image

5. Run Docker Container:

make docker-run

Configuration

The network can be configured through environment variables or a config file. Key configuration options:

• NODE_MONIKER: The Scalar node's moniker
• PEERS_FILE: File with peer list for network connection
• CONFIG_PATH: Path to configuration file
• PRESTART_SCRIPT: Pre-launch script path

Contributing

Contributions are welcome! Please read our Contributing Guidelines before submitting pull requests.

License

[License details to be added]

Security

For security concerns, please email [security contact to be added].