A Survey on Off-chain Networks: Frameworks, Technologies, Solutions and Challenges.
CoRR(2023)
Abstract
Blockchain has received increasing attention in academia and industry.
However, the increasing transaction volumes and limited on-chain storage
underscore scalability as a key challenge hindering the widespread adoption of
blockchain. Fortunately, off-chain networks that enable transactions outside
the blockchain show promising potential to mitigate the scalability challenge.
Off-chain solutions that address blockchain scalability hurdles, such as
payment channel networks, facilitate secure and fast off-chain transactions,
thus relieving the main chain's strain. In this article, we provide a
comprehensive review of key technologies, solutions, and challenges of
off-chain networks. First, we introduce the background of off-chain networks
encompassing design motivation, framework, overview, and application scenarios.
We then review the key issues and technologies associated with off-chain
networks. Subsequently, we summarize the mainstream solutions for the
corresponding key issues. Finally, we discuss some research challenges and open
issues in this area.
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