A Coordination Blockchain is a blockchain that coordinates activities of multiple private blockchains. This paper discusses the pros and cons of using Ethereum MainNet, the public Ethereum blockchain, as a Coordination Blockchain. The requirements Ethereum MainNet needs to fulfil to perform this role are analyzed within the context of Ethereum Private Sidechains, a private blockchain technology which allows many blockchains to be operated in parallel, and allows atomic crosschain transactions to execute across blockchains. We found that Ethereum MainNet is best suited to storing long-term static data that need to be widely available, such as the Ethereum Registration Authority information. However, due to Ethereum MainNet’s probabilistic finality, it is not well suited to information that needs to be available and acted upon immediately, such as the Sidechain Public Keys and Atomic Crosschain Transaction state information that need to be accessible prior to the first atomic crosschain transaction being issued on a sidechain. Although this paper examined the use of Ethereum MainNet as a Coordination Blockchain within reference to Ethereum Private Sidechains, the discussions and observations of the typical tasks a Coordination Blockchain may be expected to perform are applicable more widely to any multi-blockchain system.

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使用以太坊主网作为以太坊私有侧链的协调区块链的优点

一种协调区块链是一个协调多个私有区块链活动的区块链。本文讨论了使用以太坊主网（以太坊公共区块链）作为协调区块链的利弊。在以太坊私有侧链的背景下分析了以太坊主网执行此角色所需满足的要求，这是一种私有区块链技术，允许多个区块链并行操作，并允许跨区块链执行原子跨链交易。我们发现以太坊主网最适合存储需要广泛使用的长期静态数据，例如以太坊注册机构信息。然而，由于以太坊主网的概率确定性，它不太适合需要立即可用并采取行动的信息，例如侧链公钥和原子跨链交易状态信息，在侧链上发布第一个原子跨链交易之前需要访问这些信息。尽管本文研究了以太坊主网作为协调区块链在以太坊私有侧链中的使用，但对协调区块链可能执行的典型任务的讨论和观察更广泛地适用于任何多区块链系统。