论文标题
快照协议：系统方面
Snap-and-Chat Protocols: System Aspects
论文作者
论文摘要
可用性基础难题表明，在动态参与和网络分区下，区块链协议既不能可用。最近提出了快照方案作为解决这一困境的解决方案。快照协议可生产一个始终可用的分类帐，其中包含最终的前缀分类帐，该账本始终是安全的，并且在网络条件允许的情况下赶上可用的分类帐。与现有的基于手工最终小工具的设计（例如以太坊2.0的共识协议Gasper）相反，Snap and Chat协议被构造为现成的BFT和最长链条协议的黑盒组成。在本文中，我们考虑了快照协议的系统方面，并展示了它们如何提供两个重要功能：1）问责，2）支持光客户端。通过这项调查，获得了对快照协议的优势和挑战的更深入的了解。
The availability-finality dilemma says that blockchain protocols cannot be both available under dynamic participation and safe under network partition. Snap-and-chat protocols have recently been proposed as a resolution to this dilemma. A snap-and-chat protocol produces an always available ledger containing a finalized prefix ledger which is always safe and catches up with the available ledger whenever network conditions permit. In contrast to existing handcrafted finality gadget based designs like Ethereum 2.0's consensus protocol Gasper, snap-and-chat protocols are constructed as a black-box composition of off-the-shelf BFT and longest chain protocols. In this paper, we consider system aspects of snap-and-chat protocols and show how they can provide two important features: 1) accountability, 2) support of light clients. Through this investigation, a deeper understanding of the strengths and challenges of snap-and-chat protocols is gained.
