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Pros
- Improved Security: Mitigates delay attacks and ensures only valid states are confirmed, with high bonds (e.g., millions in USD equivalent) deterring malice while allowing trustless defense.
- Permissionless Decentralization: Anyone can validate via bonds, reducing reliance on centralized entities and enabling community participation through pools.
- Bounded Delays: Caps withdrawal delays at ~12.8 days during disputes, providing predictability.
- Incentives: Includes bounties (1% of confiscated bonds) and reimbursements for honest defenders, plus optional chain-specific rewards.
Cons
- High Economic Barriers: Large bonds (e.g., 3600
ETHfor assertions on Arbitrum One) may limit small-scale participation without pools, and disputes impose opportunity costs on users (e.g., ~$3.27M USD/week for Arbitrum One's TVL). - Upgrade Disruptions: Enabling BoLD delays pending withdrawals and requires careful overflow handling during the upgrade.
- Complexity: Adds operational needs for proposers and parameter tuning (e.g., bond sizes, resource ratios) to maintain security.