We present BATTLE for Bitcoin, a DoS-resilient dispute layer that secures optimistic bridges between Bitcoin and rollups or sidechains. Our design adapts the BATTLE tournament protocol to Bitcoin's UTXO model using BitVM-style FLEX components and garbled circuits with on-demand L1 security bonds. Disputes are resolved in logarithmic rounds while recycling rewards, keeping the honest asserter's minimum initial capital constant even under many permissionless challengers. The construction is fully contestable (challengers can supply higher-work counter-proofs) and relies only on standard timelocks and pre-signed transaction DAGs, without new opcodes. For $N$ operators, the protocol requires $O(N^2)$ pre-signed transactions, signatures, and message exchanges, yet remains practical at $N\!\gtrsim\!10^3$, enabling high decentralization.
翻译：本文提出BATTLE for Bitcoin，这是一种抗拒绝服务攻击的争议解决层，用于保障比特币与Rollup或侧链之间乐观桥接的安全性。我们的设计通过BitVM风格的FLEX组件和按需L1安全债券的混淆电路，将BATTLE锦标赛协议适配至比特币的UTXO模型。争议解决在保持奖励循环的对数轮次内完成，即使面对大量无许可挑战者，诚实断言者的最小初始资本仍保持恒定。该构建具备完全可争议性（挑战者可提供更高工作量的反证），且仅依赖标准时间锁和预签名交易有向无环图，无需新增操作码。对于$N$个操作者，协议需要$O(N^2)$数量的预签名交易、签名和消息交换，但在$N\!\gtrsim\!10^3$规模下仍保持实用性，可实现高度去中心化。
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