This paper proposes an efficient framework to execute Smart Contract Transactions (SCTs) concurrently based on object semantics, using optimistic Single-Version Object-based Software Transactional Memory Systems (SVOSTMs) and Multi-Version OSTMs (MVOSTMs). In our framework, a multi-threaded miner constructs a Block Graph (BG), capturing the object-conflicts relations between SCTs, and stores it in the block. Later, validators re-execute the same SCTs concurrently and deterministically relying on this BG. A malicious miner can modify the BG to harm the blockchain, e.g., to cause double-spending. To identify malicious miners, we propose Smart Multi-threaded Validator (SMV). Experimental analysis shows that the proposed multi-threaded miner and validator achieve significant performance gains over state-of-the-art SCT execution framework.

中文翻译：

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使用基于对象的事务内存在区块链中高效并发执行智能合约

本文提出了一种基于对象语义并发执行智能合约事务 (SCT) 的有效框架，使用乐观的基于单版本对象的软件事务内存系统 (SVOSTMs) 和多版本 OSSTMs (MVOTMs)。在我们的框架中，多线程矿工构建块图（BG），捕获 SCT 之间的对象冲突关系，并将其存储在块中。之后，验证者依赖这个 BG 并发地和确定性地重新执行相同的 SCT。恶意矿工可以修改 BG 以损害区块链，例如导致双花。为了识别恶意矿工，我们提出了智能多线程验证器（SMV）。实验分析表明，与最先进的 SCT 执行框架相比，所提出的多线程矿工和验证器实现了显着的性能提升。