BOB ¹

What is BOB?

An L2 that brings Bitcoin into Ethereum DeFi while being secured by both chains — Bitcoin holders stake their BTC to validate the network and earn yield. The key difference: Unlike wrapped BTC on other chains, here your Bitcoin actively secures the network through Babylon staking, and if validators misbehave, their actual BTC gets slashed on Bitcoin itself.

Best for: Bitcoin DeFi needing EVM compatibility, BTC liquid staking protocols, cross-chain apps wanting both Ethereum composability and Bitcoin security.

Technical: OP Stack rollup with Babylon BTC staking for finality, BitVM bridges in development, member of Optimism Superchain.

• Security & Data Availability

  • OP rollup with standard 7-day fraud proof window on Ethereum.
  • Bitcoin finality via Babylon — BTC stakers validate BOB state with slashing.
  • ZK proofs being added for cryptographic state validity (Phase 2).

• Infra & Execution

  • Bitcoin light client enables reading BTC state directly in contracts.
  • BitVM bridge on testnet — trust-minimized BTC transfers without wrapping.
  • Supports all major BTC LSTs (Babylon, Solv, Bedrock, PumpBTC).

• Performance

  • Standard OP Stack performance with 2-second blocks.
  • Bitcoin finality adds 10-60 minute confirmation for maximum security.
  • Network fees contribute to BTC staking rewards, creating sustainable economics.

• Use Cases

  • BTC liquid staking hub: Native integration with Babylon LST ecosystem
  • Bitcoin DeFi: Major protocols deployed for BTC-native yield
  • Cross-chain infrastructure: Part of both Superchain and Bitcoin networks
  • Institutional BTC: Secure Bitcoin yield without leaving the ecosystem

• Trade-offs

  • Dual finality more complex than single-chain L2s.
  • BitVM bridge still on testnet — wrapped tokens dominate for now.
  • Centralized sequencer like all OP Stack chains.
  • Higher complexity for developers navigating two security models.

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