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I am using a factory A to produce child contracts. Now I want to guarantee that only these child contracts have access to a different contract B.

Using the factory as a proxy is somehow a detour as I also would like to send stuff back from B to the children. I thought using the nonce of the factory A would be great but this is not accessible in Solidity. Is there any other way?

Thanks!

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    How about just whitelisting the right contract addresses so only those addresses are able to call the contract B? – Lauri Peltonen Apr 1 '19 at 6:09
  • B can just ask A if the calling contract is a valid caller. (A needs to keep a mapping of its children.) – user19510 Apr 1 '19 at 6:47
  • @smarx Thanks! I was thinking to complicated here. – RobOnChain Apr 1 '19 at 7:56

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