Does it work? is there any gotcha that we need to watch out for?

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There is absolutely no issue for new contracts to interact with contracts which are already deployed for long time ( which suggests that they are probably older solidity versions ). Recently I deployed a contract with solidity version 7.0.0 and inside of it I created a instance of already existing contract ( by interface contract ) which is running on solidity 0.4.8 and the newer contract is passing and reading data from the old contract without any issues.

  • Nice! would you be able to share the link to your deployed contract?
    – c.sokun
    Commented Jan 13, 2022 at 5:54

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