Trustless Cross-chain Communication for Zendoo Sidechains

TL;DR

This paper presents a comprehensive method for cross-chain communication and token transfer among sidechains in a Bitcoin-like blockchain ecosystem, enabling new decentralized applications and interoperability.

Contribution

It introduces a novel cross-chain communication protocol and token transfer mechanism that extend previous sidechain constructions, facilitating inter-sidechain interactions.

Findings

Enables cross-chain token transfers across multiple sidechains.

Supports new applications like decentralized exchanges.

Enhances interoperability in blockchain ecosystems.

Abstract

In the Zendoo white paper, we introduced a novel sidechain construction for Bitcoin-like blockchains, which allows a mainchain to create and communicate with sidechains of different types without knowing their internal structure. In this paper, we take a step further by introducing a comprehensive method for sidechains to communicate amongst each other. We will also discuss the details of a cross-chain token transfer protocol that extends the generic communication mechanism. With the cross-chain token transfer protocol, it can enable a broad range of new applications, such as an exchange platform, that allows the ability to trade tokens issued from different sidechains.