Unified QR scanning

[benalleng]

adds support for scanning bip21 qrs on withdrawal.

I didn't really make an attempt to add any substantial bip21 support as we only use it for finding the lightning param.

Closes #734

[ekzyis]

Welcome first-time contributor :)

Changes look good, I will test them today. Thanks in advance!

Btw, you can add your SN nym to contributors.txt if you want to have verified stacker.news contributor in your SN profile (assuming you're on SN). For example, see my profile.

Can you also format/lint your code? Our CI failed because of this:

Run npm run lint

> [email protected] lint
> standard

standard: Use JavaScript Standard Style (https://standardjs.com)
standard: Run `standard --fix` to automatically fix some problems.
  /home/runner/work/stacker.news/stacker.news/pages/wallet.js:281:38: Trailing spaces not allowed. (no-trailing-spaces)
  /home/runner/work/stacker.news/stacker.news/pages/wallet.js:283:[4](https://github.com/stackernews/stacker.news/actions/runs/7537135803/job/20532278497?pr=755#step:5:5)[9](https://github.com/stackernews/stacker.news/actions/runs/7537135803/job/20532278497?pr=755#step:5:10): Strings must use singlequote. (quotes)
Error: Process completed with exit code 1.

[ekzyis]

Tested the code manually with a unified invoice that Mutiny generated since I wasn't able to reliably scan the QR code with my webcam [0]

Welcome to Node.js v21.4.0.
Type ".help" for more information.
> result = "bitcoin:bc1plrevlm0tr0yccfg499hgrl57u0fc7lnwupqcu9qpssd845lzrt5skcx9xz?amount=0.00001&lightning=lnbc10u1pj6wfs4dqqpp52gw5tjtfaahkws2lv2s8lmfgyr34h9nv5z2nqgs7p9lt88g4w9mssp5guyscxept4v92rjamz2sxuj0qu8t92gdqklc98ja9fe0u8u6g22q9qrsgqcqpjnp4q05axhx0lmcwhhg53d20nzmwmh3ugzkqf7n6xsfrhcvwchjznwqesxqrrssrzjq25kye844yxfwqs4fck9qf6p6apclwa0ns28362gtg5q8kz5l4t5xqqqqqqqqqqqqyqqqqqqqqqqqqqqrcckcl7dtwdx30hmwrhalsrrrup9wx66vvnulh4ymzy7kdd4yccv6jl4my5msswp48jqd7wkq09hq47akn2ctzmk6av9kc5pus67rw56gpxzl7m8"
'bitcoin:bc1plrevlm0tr0yccfg499hgrl57u0fc7lnwupqcu9qpssd845lzrt5skcx9xz?amount=0.00001&lightning=lnbc10u1pj6wfs4dqqpp52gw5tjtfaahkws2lv2s8lmfgyr34h9nv5z2nqgs7p9lt88g4w9mssp5guyscxept4v92rjamz2sxuj0qu8t92gdqklc98ja9fe0u8u6g22q9qrsgqcqpjnp4q05axhx0lmcwhhg53d20nzmwmh3ugzkqf7n6xsfrhcvwchjznwqesxqrrssrzjq25kye844yxfwqs4fck9qf6p6apclwa0ns28362gtg5q8kz5l4t5xqqqqqqqqqqqqyqqqqqqqqqqqqqqrcckcl7dtwdx30hmwrhalsrrrup9wx66vvnulh4ymzy7kdd4yccv6jl4my5msswp48jqd7wkq09hq47akn2ctzmk6av9kc5pus67rw56gpxzl7m8'
> result.startsWith("bitcoin:")
true
> result.split("lightning=")
[
  'bitcoin:bc1plrevlm0tr0yccfg499hgrl57u0fc7lnwupqcu9qpssd845lzrt5skcx9xz?amount=0.00001&',
  'lnbc10u1pj6wfs4dqqpp52gw5tjtfaahkws2lv2s8lmfgyr34h9nv5z2nqgs7p9lt88g4w9mssp5guyscxept4v92rjamz2sxuj0qu8t92gdqklc98ja9fe0u8u6g22q9qrsgqcqpjnp4q05axhx0lmcwhhg53d20nzmwmh3ugzkqf7n6xsfrhcvwchjznwqesxqrrssrzjq25kye844yxfwqs4fck9qf6p6apclwa0ns28362gtg5q8kz5l4t5xqqqqqqqqqqqqyqqqqqqqqqqqqqqrcckcl7dtwdx30hmwrhalsrrrup9wx66vvnulh4ymzy7kdd4yccv6jl4my5msswp48jqd7wkq09hq47akn2ctzmk6av9kc5pus67rw56gpxzl7m8'
]
> result.split("lightning=")[1].split(/[&?]/)
[
  'lnbc10u1pj6wfs4dqqpp52gw5tjtfaahkws2lv2s8lmfgyr34h9nv5z2nqgs7p9lt88g4w9mssp5guyscxept4v92rjamz2sxuj0qu8t92gdqklc98ja9fe0u8u6g22q9qrsgqcqpjnp4q05axhx0lmcwhhg53d20nzmwmh3ugzkqf7n6xsfrhcvwchjznwqesxqrrssrzjq25kye844yxfwqs4fck9qf6p6apclwa0ns28362gtg5q8kz5l4t5xqqqqqqqqqqqqyqqqqqqqqqqqqqqrcckcl7dtwdx30hmwrhalsrrrup9wx66vvnulh4ymzy7kdd4yccv6jl4my5msswp48jqd7wkq09hq47akn2ctzmk6av9kc5pus67rw56gpxzl7m8'
]
> result.split("lightning=")[1].split(/[&?]/)[0].toLowerCase()
'lnbc10u1pj6wfs4dqqpp52gw5tjtfaahkws2lv2s8lmfgyr34h9nv5z2nqgs7p9lt88g4w9mssp5guyscxept4v92rjamz2sxuj0qu8t92gdqklc98ja9fe0u8u6g22q9qrsgqcqpjnp4q05axhx0lmcwhhg53d20nzmwmh3ugzkqf7n6xsfrhcvwchjznwqesxqrrssrzjq25kye844yxfwqs4fck9qf6p6apclwa0ns28362gtg5q8kz5l4t5xqqqqqqqqqqqqyqqqqqqqqqqqqqqrcckcl7dtwdx30hmwrhalsrrrup9wx66vvnulh4ymzy7kdd4yccv6jl4my5msswp48jqd7wkq09hq47akn2ctzmk6av9kc5pus67rw56gpxzl7m8'

However, I was able to scan it once and it entered some numbers into the invoice field. Not sure if that's relevant, it's probably just my webcam being bad.

But @huumn mentioned a good point here. User feedback in cases where we can detect they are doing something wrong (trying to scan onchain invoices for SN which is a LApp) sounds like the way to go.

[0] because my webcam produces unsharp images, I assume.

[huumn]

Merged! Feel free to add your nym to contributors.txt in another PR.

Also send me your lightning address when you get a chance so I can send you some sats when this ships.