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Call contract data storage problem

2022-02-04 00:07:51 Q & A of Denglian community

Suppose there is a smart contract A, There is a field message Can store a person's important information . Under this premise , Every time an external account calls the contract ,message Whether it will be overwritten ? My question is , Suppose this message It makes sense for every external account , So how can I query the overwritten message, Or in the past message How is it guaranteed to be real , Something that has not been tampered with ?PS: At present, my understanding is that when an external account invokes a contract , Traded tx data There are function selectors and parameters , Maybe you can start with the parameters .






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