BOB ¹

The L2 where Bitcoin holders stake BTC to secure the network and earn Ethereum DeFi yields. BOB brings actual Bitcoin security to EVM through Babylon staking — validators get their real BTC slashed on Bitcoin if they misbehave.

Unique Position Unlike wrapped BTC on other chains, Bitcoin actively secures BOB through Babylon staking with on-chain slashing. The only L2 with dual finality from both Ethereum and Bitcoin, creating a unique security model. BitVM bridges (in development) will enable trust-minimized BTC transfers without traditional wrapping.

Primary Use Cases

• Bitcoin liquid staking protocols seeking EVM composability
• BTC holders wanting DeFi yields without wrapping risk
• Cross-chain applications needing both Bitcoin and Ethereum security
• Institutional Bitcoin strategies requiring native BTC collateral
• Bitcoin-secured synthetic assets and lending markets

Ecosystem Character Bitcoin-first ecosystem focused on BTC yield generation rather than general DeFi. Early adopters include major BTC liquid staking protocols and Bitcoin-native teams. Community values Bitcoin security principles while leveraging Ethereum's DeFi infrastructure. Part of Optimism Superchain but culturally aligned with Bitcoin.

Trade-offs

• Dual finality system more complex than single-chain security models
• BitVM bridge still on testnet — currently relies on wrapped tokens
• Centralized sequencer inherited from OP Stack architecture
• Developer complexity from managing two different security assumptions
• Smaller ecosystem compared to established L2s

Technical Details

Architecture OP Stack rollup enhanced with Babylon BTC staking for additional finality. Bitcoin light client integrated directly into EVM enables reading Bitcoin state in smart contracts. Member of Optimism Superchain with standard fraud proof mechanics plus Bitcoin validation layer.

Performance Standard OP Stack performance with two-second blocks and comparable throughput. Bitcoin finality adds 10-60 minute confirmation time for maximum security guarantees. Network fees contribute to BTC staking rewards, aligning incentives between users and validators.

Security & Trust Model Dual security from Ethereum settlement (7-day fraud proofs) and Bitcoin finality through Babylon staking. BTC stakers validate BOB state transitions with slashing penalties enforced on Bitcoin itself. ZK proof integration planned for cryptographic validity without challenge periods.

Control & Governance Centralized sequencer operated by BOB team following OP Stack standards. Protocol upgrades follow Optimism governance model with additional Bitcoin staker input mechanisms planned. BitVM development community-driven but implementation controlled by core team.