Allow transfer to smart contract principal

[whoabuddy]

This started with testing a simple Clarity contract that can stack its own STX through pool delegation.

Tried to fund the contract from the sandbox using a deposit function, but without post-conditions the deposit failed.

Next tried transferring using the Send screen of the wallet extension, which resulted in Address provided is not valid

Was able to get past this by writing a script, but should this type of transfer be allowed from the wallet? Maybe with a warning?

[markmhendrickson]

Thanks for the request. It looks like we're tracking it here as well: #2514

@kyranjamie see any reason why this wouldn't be a simple validation change? Does the wallet need to handle the recipient value differently if it contains a contract?

[kyranjamie]

It could be fairly straightforward, I'd need to look into it. Not 100% sure Stacks.js supports contract principals

[dartman10]

+1 🙏