The cost of immortality: A Time To Live for smart contracts

Dimitri Saingre, T. Ledoux, Jean-Marc Menaud
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Abstract

Smart contracts, scripts at the heart of blockchain-based applications, are meant to be available forever once deployed. However, this property has a price. The amount of space required to store new contracts keeps increasing. This increase impacts each participating node's performance and makes it inconvenient for low-end devices to participate in the network. Among all contracts deployed in the blockchain, a vast majority will lead to little if any usage. We demonstrate that, in the course of one year, 70 % of deployed contracts lead to no use. Unfortunately, unused contracts keep occupying space on the blockchain. To tackle this issue, we propose a new protocol to identify and delete unused contracts. Through simulation, based on Ethereum historical data, we show that deletion of smart contracts after an inactivity period of 90 days could lead to a 66 % reduction in the number of contracts stored over a year.
永生的代价:智能合约的生存时代
智能合约是基于区块链的应用程序的核心脚本,一旦部署,就意味着永远可用。然而,这种属性是有代价的。存储新合约所需的空间不断增加。这种增加影响了每个参与节点的性能,并且不方便低端设备参与网络。在区块链中部署的所有合约中,绝大多数都很少使用。我们证明,在一年的时间里,70%的部署合同没有被使用。不幸的是,未使用的契约一直占据区块链上的空间。为了解决这个问题,我们提出了一个新的协议来识别和删除未使用的合约。通过模拟,基于以太坊的历史数据,我们表明,在90天的不活跃期后删除智能合约可能导致一年内存储的合约数量减少66%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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