Abstract
Transactions concurrent execution is one of the most promising solutions to enhance throughput for blockchain systems. Traditional concurrent execution schemes include on-chain concurrency and off-chain concurrency. However, they either increase hardware requirements to nodes or bring extra overheads for transaction verification, compromising the decentralization and security properties of blockchains. In this paper, we propose a new concurrent execution scheme that integrates off-chain execution into the on-chain concurrent execution scheme, by which a blockchain system can enhance performance without compromising security and decentralization. To achieve this, we first propose a consistent information scheduling mechanism. This mechanism divides scheduling information of transactions based on the execution-related information, improving the efficiency of scheduling information transmission and execution between on-chain and off-chain nodes. Then, to achieve secure and efficient collaboration between on-chain and off-chain nodes, our scheme proposes a secure collaboration validation mechanism without additional security assumptions. Finally, we implement our prototype based on Tendermint and compare it with the serial execution scheme in the blockchain. The experimental results show that our scheme can achieve a maximum throughput improvement of 2.6\(\times \), 11.2\(\times \) less execution time, and 2.1\(\times \) less verification time.
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Acknowlegements
The work described in this paper was supported by the National Key Research and Development Plan(2022YFF0903100), the National Natural Science Foundation of China (62172453), the National Natural Science Foundation of Guangdong province(2022A1515010154), the Major Key Project of PCL(PCL2021A06), and the Pearl River Talent Recruitment Program (No. 2019QN01X130).
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Chen, W., Yang, Z., Zhang, J., Liang, J., Sun, Q., Zhou, F. (2023). Enhancing Blockchain Performance via On-chain and Off-chain Collaboration. In: Monti, F., Rinderle-Ma, S., Ruiz Cortés, A., Zheng, Z., Mecella, M. (eds) Service-Oriented Computing. ICSOC 2023. Lecture Notes in Computer Science, vol 14419. Springer, Cham. https://doi.org/10.1007/978-3-031-48421-6_27
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