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Ongoing smart contract attack events have seriously impeded the practical application of blockchain. Although lots of researches have been conducted, they mostly focus on off-chain vulnerability detection. However, smart contracts cannot be modified once they have been deployed on-chain, thus existing techniques cannot protect those deployed contracts from being attacked. To mitigate this problem, we propose a general smart contract repairer named Aroc, which can automatically patch vulnerabledoi:10.1109/tse.2021.3123170 fatcat:bjsdbduscbbnvgrt7xbseydvmu