Is it possible to log the IP address and various system details (meta data etc.) about a msg.sender who is sending a transaction to your smart contract?
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Log it where???– goodvibrationCommented Jan 3, 2020 at 13:33
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2 Answers
I do not think it is possible. At least, it cannot be found in the documentation: https://solidity.readthedocs.io/en/v0.6.1/miscellaneous.html#index-4
Moreover, it would be a major paradox into a blockchain (at least a public one). One nice element is that it is very hard to know who is who in a network unless you want people to know it. If you have access to IP address in the smart contract, it could be very helpful knowing who is the owner of a eth address.
answered Jan 3, 2020 at 14:10
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Yeah but often, people interact with a smart contract through some sort of application running a node, i.e. they're not running a node themselves but perhaps use a wallet service. If the wallet service is running the node or let's say someone is using infura, then these 3rd parties could be logging everything no?– NowsyMeCommented Jan 3, 2020 at 16:43
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1@NowsyMe Correct. But the fact that someone is doing it is not a reason to do it too ^^ Commented Jan 6, 2020 at 8:27
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Ok, I'm asking because I read it was a research topic to create a network which anonymise meta data from transactions like this on public chains like ethereum– NowsyMeCommented Jan 6, 2020 at 12:27
No, you can't. Only the node that receive the transaction could know it, but once the transaction is spread to the others nodes, this is hopefully lost.
