The first sophisticated Layer-2 (L2) solution built on Bitcoin.
Bitcoin and other UTXO chains (Unspent Transaction Output) have remained largely untapped in terms of their vast liquidity potential. Sundial Protocol is set to change this dynamic by seamlessly merging Bitcoin’s liquidity with advanced eUTXO smart contracts. As the first sophisticated Layer-2 (L2) solution built on Bitcoin, Sundial offers scalability, security, and institutional-grade compliance while addressing the limitations of existing blockchain networks.
Technical Documentation
Full L2 protocol documentation for developers.
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The full protocol specification: ledger rules, fraud proofs, and implementation.
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Learn how it all works!
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Read the code review and security analysis report from Hacken.
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Unlocking the DeFi Opportunities Available on Sundial
Sundial Attends Liquidity and Consensus 2026, Hong Kong
Fida and Sundial: Pioneering DeFi Insurance on Bitcoin
Sundial Reaches Top 2 at BitAngels London
Sundial Attends Token2049 Singapore and the Tech for Impact Summit, Tokyo
Designing a Bitcoin DeFi for Institutions - Trust, Compliance and UX
Empowering Your Bitcoin Treasury to Be More Than Just a Hedge
Join leading institutions leveraging Sundial's secure infrastructure for sustainable Bitcoin yield