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Bot X
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How can I check if a contract exists in Solidity?

I have got a problem: I have a contract factory that creates some temporary contracts. I want every contract to exist for about 5 days, afterwards, it self-destructs. However, I want to create a directory that stores the addresses of all temporary contracts and lists them for you. Registering the temporary contracts to the directory contract is no problem I just don't know how I can find out if a contract does still exist so that the destroyed contracts are not listed anymore.

Thank you in advance.

Bot X
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