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A special private key that can be used to make a TX to a certain wallet ONLY (self.cryptocurrency)

submitted 1 year ago* (last edited 1 year ago) by Jorgelina to c/cryptocurrency

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I want to be able to achive this:

a private key or its substitute (P) of a user wallet is stored on a server
there're 100s of user wallets there, so there're 100s of (P) too
let's say, it's ETH, SOL or any other major network
server isn't a safe environment, as it's known
there's also a main, admin wallet (M), in cold, local storage
(P) must only be used to send outbound TXs to (M). Not anywhere else

This can't be achived with a normal private key, right? But how, if at all, it can be archived? Multisignature wallets?

The goal is automate withdrawals from the user wallets on a server, to make the process safer.

I don't consider any third-party solutions.

I'm a developer

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[–] nofoxgiven 1 points 1 year ago

It's impossible to do this (at least for EVM networks) without writing your own custom contract.

If you're a Solidity dev, you should know this.