Credential Required CAT Guardrails

[nezzee]

While Credential Required CATs aren't commonplace as of yet, I think it might be pertinent to think about how more casual users may accidentally do things in a way that would cause issues.

One such problem appears that it is possible to send a CR-CAT direct to a wallet that does not have a valid credential to be able to spend it. While a solution may be that they simply GET a valid credential, it's entirely possible that the recipient would NEVER be able to get the required credential in order to spend that CAT (for instance, a CAT being sent to a non-US citizen who is either unable or unwilling to become a US citizen.) In this instance, the CR-CAT would essentially be bricked, which in the case of securities, would not be ideal.

Obviously, this is not to say users can't do what they want, however, I believe it should be prevented or at least heavily warned against in the Chia reference wallet if sending CR-CATs directly to a wallet address without a clawback. That way, at the very least, if the receiving wallet is unable to collect, it can be requested back from the sender.