A Multi-Chain Bitcoin Bridging Protocol - Comprehensive technical documentation covering architecture, security, and implementation details.
Overview of SatsFlux protocol and key features
System design and component interactions
Taproot-enabled vault and threshold signatures
Cross-chain bridging protocol mechanics
Cross-chain coordination and routing
On-chain contract implementations
Threat model and mitigation strategies
SatsFlux token distribution and utility
SatsFlux is a decentralized protocol that bridges Bitcoin (BTC) to multiple blockchain networks in a secure, trust-minimized way. It introduces sBTC, a 1:1 BTC-backed token that can move across Ethereum, Arbitrum, Base, Solana, and other chains while being fully collateralized by BTC held in a robust cross-chain vault.
The SatsFlux network leverages Bitcoin's latest advancements – including Taproot-enabled threshold signatures (MuSig2 and FROST) – to custody BTC in a multi-party vault with strong security and privacy. A decentralized federation of signers (node operators) collectively controls the BTC vault using threshold cryptography, eliminating any single point of failure.
These signers are economically bonded by the SatsFlux native token (with a fixed 500 billion supply) to align incentives, and can be slashed for misbehavior, ensuring the safety of the peg.
MuSig2 and FROST cryptography for secure multi-party Bitcoin custody
Leverages Bitcoin's latest privacy and efficiency improvements
Native sBTC tokens on Ethereum, Arbitrum, Base, Solana and more
Signers stake SatsFlux tokens and can be slashed for misbehavior
Robust on-chain verification and minting/burning logic
No centralized custodian, cryptographic and economic guarantees
Core protocol implementation, signer network setup, initial testing
Comprehensive security audits, bug bounty program, final testing
Production deployment, initial chain support (Ethereum, Arbitrum)
Base, Solana integration, enhanced routing layer