Secure and Efficient Interledger Communication With Trusted Hardware

Distributed ledgers are enabling novel applications in traditional domains, such as finance, healthcare and supply chains, and in emerging domains such as metaverse. We observe that the current ecosystem is fragmented, with different blockchains operating in silos. Interledger applications that can access resources in different ledgers can tap into the billions of dollars worth of locked resources, but they require support for interledger communication. Existing interledger communications, however, are either insecure, inefficient, or application specific. Our goal is to design a system for interledger applications. To this end, we design and implement that achieves strong security guarantees and high performance while providing the general message passing abstraction to the applications. Our system leverages trusted hardware for performance and threshold signature schemes for strong security. It consists of multiple lightweight clients that verify transactions within their trusted execution environments before generating threshold signatures. We conduct extensive performance evaluations of and compare it against three state-of-the-art systems, namely WeCross, Cosmos IBC and LayerZero-V2. The results show that is efficient, achieving up to$42\times$higher throughput than the baselines.