I'm not really sure what to call this, but is there some sort of "protocol" for Bitcoin transfer, like btc:// or something? If not it ought to be made, as it makes a hell of a lot of sense (to me at least). Something like:
btc://<address>?amount=5.00&reason=1%20bar%20of%20chocolate
then Bitcoin processing apps/websites/whatever could request to use that protocol. Once you tell your computer/smart phone/what have you to use this app/website/whatever for btc:// URLs you could click a link or scan a QR code or whatever and it would open that app, which would confirm that you wish to transfer 5.00 BTC for "1 bar of chocolate" (using my example). If the user indicates that they would like to it goes ahead with the transfer. all of the parameters would be optional, as the only thing required would be the address and the rest could be manually input by the user. For people who like to store their bitcoins online, most modern browsers provide a Javascript interface for requesting the be opened when using a specific protocol. For example, mibbit, the web based IRC client, has an option to be set as your default IRC client.
I feel like something like this should exist but I haven't heard any mention of it. Does it exist? If not, i propose we implement this. I would be willing to write user scripts to modify popular web based Bitcoin services (until they implement it)
