Scan enhancements so Canoe can read amount and label defined in the Nano spec

[ceddup]

Here is the Nano spec about QRCodes : https://github.com/nanocurrency/raiblocks/wiki/URI-and-QR-Code-Standard. So I'd like to add 'amont' and 'label' support at least. Not sure what to do with 'message' for now. This is to get price tags with QRCodes to be handled by Canoe... Also adding 'nanoamount' whould be more user friendy and ultimately 'altamount' and 'altcurrency' so the users can print price tags in alt currency and it would get converted on time to Nano by Canoe.

[gokr]

See: https://github.com/getcanoe/canoe/blob/47282ad8f44ccd8244bfdb0d5c0d748869a11067/src/js/services/nanoService.js#L408-L488

[ceddup]

Update on this topic:

• amount and xrb address work fine
• I'd like to add a 'currency' param so users could make price tags in fiat (so they don't change as NANO rate changes)
• This field could also contain the 'NANO' value so the users could enter an amout in NANO and not in raw, which is way more convenient This can get tested here :http://nanosign.org/#content=xrb%3Axrb_3955mshdeaoda1nbgpuj6wiq4x967jky1c435odafpi5qpphiiye6owze4yz%3Famount%3D500000000000000000000000000000&options=%7B%22items%22%3A%5B%7B%22mode%22%3A%22image%22%2C%22msize%22%3A20%2C%22mposx%22%3A20%2C%22mposy%22%3A50%2C%22label%22%3A%22NANO%22%2C%22fontname%22%3A%22undefined%22%2C%22fontcolor%22%3A%22%23000000%22%2C%22stroke%22%3Atrue%2C%22imageurl%22%3A%22http%3A%2F%2Fnanosign.org%2FNano_basic_dark.png%22%2C%22image%22%3A%7B%7D%7D%2C%7B%22mode%22%3A%22label%22%2C%22msize%22%3A20%2C%22mposx%22%3A95%2C%22mposy%22%3A47%2C%22label%22%3A%220.5%20NANO%22%2C%22fontname%22%3A%22Nunito%22%2C%22fontcolor%22%3A%22%23000000%22%2C%22stroke%22%3Atrue%2C%22imageurl%22%3A%22undefined%22%2C%22image%22%3A%7B%7D%7D%2C%7B%22mode%22%3A%22label%22%2C%22msize%22%3A10%2C%22mposx%22%3A95%2C%22mposy%22%3A65%2C%22label%22%3A%22Pay%20with%20NANO%22%2C%22fontname%22%3A%22Nunito%22%2C%22fontcolor%22%3A%22%23ee8a2e%22%2C%22stroke%22%3Atrue%2C%22imageurl%22%3A%22undefined%22%2C%22image%22%3A%7B%7D%7D%2C%7B%22mode%22%3A%22image%22%2C%22msize%22%3A9%2C%22mposx%22%3A56%2C%22mposy%22%3A64%2C%22label%22%3A%22%22%2C%22fontname%22%3A%22Nunito%22%2C%22fontcolor%22%3A%22%23000000%22%2C%22stroke%22%3Atrue%2C%22imageurl%22%3A%22http%3A%2F%2Fnanosign.org%2FNano_basic_logo.png%22%2C%22image%22%3A%7B%7D%7D%2C%7B%22mode%22%3A%22label%22%2C%22msize%22%3A20%2C%22mposx%22%3A50%2C%22mposy%22%3A50%2C%22label%22%3A%22%22%2C%22fontname%22%3A%22Nunito%22%2C%22fontcolor%22%3A%22%23000000%22%2C%22stroke%22%3Atrue%2C%22image%22%3A%7B%7D%7D%2C%7B%22mode%22%3A%22label%22%2C%22msize%22%3A20%2C%22mposx%22%3A50%2C%22mposy%22%3A50%2C%22label%22%3A%22%22%2C%22fontname%22%3A%22Nunito%22%2C%22fontcolor%22%3A%22%23000000%22%2C%22stroke%22%3Atrue%2C%22image%22%3A%7B%7D%7D%2C%7B%22mode%22%3A%22label%22%2C%22msize%22%3A20%2C%22mposx%22%3A50%2C%22mposy%22%3A50%2C%22label%22%3A%22%22%2C%22fontname%22%3A%22Nunito%22%2C%22fontcolor%22%3A%22%23000000%22%2C%22stroke%22%3Atrue%2C%22image%22%3A%7B%7D%7D%5D%2C%22render%22%3Anull%2C%22crisp%22%3Afalse%2C%22eclevel%22%3A%22H%22%2C%22minversion%22%3A1%2C%22fill%22%3A%22%23498ac7%22%2C%22back%22%3A%22%23ffffff%22%2C%22text%22%3A%22xrb%3Axrb_3955mshdeaoda1nbgpuj6wiq4x967jky1c435odafpi5qpphiiye6owze4yz%3Famount%3D500000000000000000000000000000%22%2C%22size%22%3A350%2C%22width%22%3A2%2C%22rounded%22%3A100%2C%22quiet%22%3A2%7D