Allow text conditionaly

Please how best do i go about this.
Each user needs a crypto wallet address to withdraw but i intend that if an address has been used by a different user before, Current user cant use it to withdraw. Therefore the “input address” should either be first time use or already linked to current user.

You can just check if the address is tied to another user (or if not tied - whether it has been used for withdrawals by another user searching trough logs, if you have logs) and block the withdrawal process.

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