It would be better if the payee crafted a cryptogram for "please pay me (authenticated address) the sum of X" Are you talking about offline? Because on a w

It would be better if the payee crafted a cryptogram for "please pay me (authenticated address) the sum of X" Are you talking about offline? Because on a website I would expect the payer to simply copy&paste the address. I would also expect a link type to evolve that browsers understand. Something like "payto:1fs8e...?amount=0.01&coin=btc" to pay 0.01 bitcoin to 1fs8e... Similar to the "mailto:user@host?subject=...&body=..." link type. An when we talk about offline (paying for a restaurant or something) - isn't there a visual link type already? I am not a user of crypto. But I think I have seen barcodes or something used for this.