Which wallets support merchant message transactions such as bip 70 - 72? I want to build static html page where a user can just send their btc to my address with a message attached to it. The message would just be their email address so I can send them an order confirmation.
From my understanding the URI: "bitcoin:1zsfkje2034908234" would just have the r parameter and you would just specify a url for the wallet to goto. This url would just be something like this I'd assume: http://www.example.com?phone=83282829323
Let me know if this is even possible or if this is even correct?