A Distributed Scalable Cross-chain State Channel Scheme Based on Recursive State Synchronization
Xinyu Liang, Ruiying Du, Jing Chen, Yu Zhang, Meng Jia, Shuangxi Cao, Yufeng Wei, Shixiong Yao
TL;DR
Interpipe tackles cross-chain scalability and trust by introducing a distributed cross-chain state channel with real-time synchronization and batch verification. It combines a recursive SNARK-based batch proof system with a state-pulling, round-based synchronization to keep two parachains in lockstep, recording cross-chain transactions efficiently. The design supports opening, updating, closing, and disputing channels while resisting hard forks, DoS, replay, and other attacks, backed by formal security reasoning and a proof-of-concept prototype. Practically, Interpipe aims to make cross-chain state channels nearly as efficient as intra-chain state channels, enabling large-scale cross-chain activity without centralized trust in intermediaries.
Abstract
As cross-chain technology continues to advance, the scale of cross-chain transactions is experiencing significant expansion. To improve scalability, researchers have turned to the study of cross-chain state channels. However, most of the existing schemes rely on trusted parties to support channel operations. To address this issue, we present Interpipe: a distributed cross-chain state channel scheme. Specifically, we propose a real-time cross-chain synchronization scheme to ensure consistent operations between two blockchains to a cross-chain state channel. Moreover, we propose a batch transaction proof scheme based on recursive SNARK to meet the cross-chain verification needs of large-scale users. Based on the above designs, Interpipe offers protocols for opening, updating, closing, and disputing operations to cross-chain state channels. Security analysis shows that Interpipe has consistency and resistance, and experimental results demonstrate that a cross-chain state channel can be nearly as efficient as an existing intra-chain state channel.