手巴覺得 係現行經濟體系下 smart contract幾乎只係係transaction方面有用
Eg基於transfer with specific tag去release token比特定既人 用黎further decrypt content/activate product咁
咁就可以A issue public key比B
然後B寫一條transfer with contract id with condition that A publish private key on chain within some time period
然後A係chain到寫private key with contract id 條private key就可以用黎decrypt some content咁
如果唔想全世界都decrypt到 可以對個content加多重得AB知既encryption