论文标题

基于HTLC的跨链原子掉期更快的定居点

Towards faster settlement in HTLC-based Cross-Chain Atomic Swaps

论文作者

Mazumdar, Subhra

论文摘要

基于时间索洛克(HTLC)基于原子交换协议,可以在两个或多个各方之间交换硬币,而无需依靠受信任的实体。该协议就像没有溢价的美国呼叫选项。它允许在一定时期内完成交易。这使掉期发起人自由延迟,然后决定继续交易。如果她认为这笔交易无利可图,她只会等待合同的时间到期。但是,由于他的资产仍然锁定在合同中,因此对手会亏损。他能做的最好的方法是根据将来的资产价格波动来预测发起人的行为。但是很难预测,因为加密货币非常波动,而且其价格突然波动。我们对基于HTLC的原子跨链交换进行游戏理论分析,以预测交换是否会成功。从玩家的战略行为来看,我们推断出该模型缺乏公平性。我们建议快速交换,这是一种基于Hashlock和Timelock的两党协议,可以促进交换的更快结算。当事方必须与本金一起锁定悲伤的基础。如果党的悲伤,他最终要支付悲伤的态度。如果一方发现一项不利的交易,他就有规定取消掉期。我们证明,与基于HTLC的原子交换相比,快速交换对参与者更友好。我们的工作是第一个提出一项协议,以确保在循环多方环境中进行原子 - 交通的公平性。

Hashed Timelock (HTLC)-based atomic swap protocols enable the exchange of coins between two or more parties without relying on a trusted entity. This protocol is like the American call option without premium. It allows the finalization of a deal within a certain period. This puts the swap initiator at liberty to delay before deciding to proceed with the deal. If she finds the deal unprofitable, she just waits for the time-period of the contract to elapse. However, the counterparty is at a loss since his assets remain locked in the contract. The best he can do is to predict the initiator's behavior based on the asset's price fluctuation in the future. But it is difficult to predict as cryptocurrencies are quite volatile, and their price fluctuates abruptly. We perform a game theoretic analysis of HTLC-based atomic cross-chain swap to predict whether a swap will succeed or not. From the strategic behavior of the players, we infer that this model lacks fairness. We propose Quick Swap, a two-party protocol based on hashlock and timelock that fosters faster settlement of the swap. The parties are required to lock griefing-premium along with the principal amount. If the party griefs, he ends up paying the griefing-premium. If a party finds a deal unfavorable, he has the provision to cancel the swap. We prove that Quick Swap is more participant-friendly than HTLC-based atomic swap. Our work is the first to propose a protocol to ensure fairness of atomic-swap in a cyclic multi-party setting.

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