Using a Hardware Wallet to Validate Transactions

The hardware wallet trust on external validator and the validator creates you know some signature. The device signs it or doesn't sign it based on what the script that run decided. i was thinking of something similar for jade i was thinking wasm so a wasm interpreter in c or in brass or in jasket type sheet whatever. You could say if if the fans go to my cold wallet i check the address is if he goes to my cold wallets then always authorize it otherwise don't.