When transferring funds from a regulated exchange to a cold wallet in the EU, we now have to prove ownership of the address for tracking purposes. That’s because of a somewhat recent law that was passed.

One popular way to do that is through message signing. 3rd party provides a unique message that we need to sign using our wallet, thus proving that we control that wallet.

Would be nice if cySync was able to support such functionality.

In short: a text field as input where we can copy/paste the challenge. A label with a copy to clipboard option as output. On that displays the signed challenge.