Unscanable QR code

[JimmyMow]

Not sure if this is because my invoices are really large for some reason? But, the QR code i’m getting when generating an invoices can’t be scanned by anyone I’m with currently. Not sure what the best workaround would be, but definitely a UX bug imo

[JimmyMow]

Ok, when testing more, I think this is because the invoice is considerably large. I assume this is because my node is huge and including a crazy amount of route hints or something?

[ottosuess]

yes. there are 18 routing hints in the invoice.
lnd's api only has the option to disable routing hints completely or set custom routing hints.

no way to limit the number. what should we do? open an issue on lnd's github to request a flag max_ routing_hints to limit the number?

[ottosuess]

this PR (by @Crypt-iQ 🔥) seems to have a solution: lightningnetwork/lnd#3022

[Crypt-iQ]

What's the size of the invoice in bytes? I merged a PR a while back that limited the size of an invoice to 7089 bytes lightningnetwork/lnd#3505
If yours is bigger, can definitely open up a PR to change the max.

[ottosuess]

$ echo -n lightning:LNBC1M1PWMFHK6PP5NF032E6DD3G7HFZC9KG6F83C6SQ9MPHWN8UTWDQ23QEVP6FNNYGSDQQCQZPGXQRRSSRZJQGUG6U90565TEMHWVVECDTFTCE7P430W7ZH8TDK57F0L7K6ZTFQHUZXG0SQQGNQQQYQQQQLGQQQQQQGQ9QRZJQGUG6U90565TEMHWVVECDTFTCE7P430W7ZH8TDK57F0L7K6ZTFQHUZ8JR5QQRDCQQYQQQQLGQQQQQQGQ9QRZJQ2HRCPHKMD4G0658FMMM4PKG02CQG84T7MVTUPV5TQJSTV0AT4LWSZ8TLVQQX3GQQQQQQQLGQQQQQQGQ9QRZJQ2ETVKJZ5N83699LFPSQRR50LQAWYH559CGE9XMTR42RQPKJCR2AWZG7ZVQQVSSQQQQQQQLGQQQQQQGQ9QRZJQTTKRTL97TPFEVVJTLG0PU5PZJLM56N88R8VK8AJKFDRTA5KDL8K5ZFFVSQQ29QQQYQQQQLGQQQQQQGQ9QRZJQTDDX37J02Z8Z4GZLQ34454KL9CMCWQ8YR2N6TDHD3GQYZS0D42ZXZ8KRQQQVDSQQQQQQQLGQQQQQQGQ9QRZJQTDAJ2VVP6R3GVNKGSYR33XRK6KL6XPL6XWFRQW08ZJ4P34DY944ZZXZSYQQ4NCQQYQQQQLGQQQQQQGQJQRZJQVH5D50F5RQDHXW00ZXALKRDS9D7D6WH22HN0AXW7KSN55NK4ACQGZF2CQQQH9CQQQQQQQLGQQQQQQGQ9QRZJQDRCK2J36WF8HC69RM4ZHKVNQ03GUHDJ04JDKKWPF6UNGQ69RDR82ZFTHQQQSWSQQYQQQQLGQQQQQQGQ9QRZJQWVTPC0F6U83X8SCED4PT7JV2X2Y85VVKNC29PWMRUWAHN97V2VR2ZXELYQQXPGQQQQQQQLGQQQQQQGQ9QRZJQW0KVSSJWHRCEUYEJW4JVP5LQQERSAZRXFC6DYUMYK4YNE226ZR4CZ8PJVQQFMCQQQQQQQLGQQQQQQGQ9QRZJQWS7KCGU8YDHNCVLM52C5UL77MHKQ343PK05TAL9DQMVEZPNUXVFWZFYYGQQC9QQQQQQQQLGQQQQQQGQ9QRZJQWNFKFLGQ3D2CZ0ZNP8LHJL6EFHCADD6CSVKKRLC28KEQPT4CGLRGZGHY5QQS5CQQYQQQQLGQQQQQQGQ9QRZJQWKVYMRMG99WQWJWLYPMDCGCGRJXFGAC3THLL8TZLRSHW68CTUF4VZXCLSQQN4SQQQQQQQLGQQQQQQGQJQRZJQWKVN7GHDAG3KEAW6CA6QSRQRL8952M6G5SC23M8UQEWFNT37H8K2Z895QQQ8CGQQQQQQQLGQQQQQQGQ9QRZJQWMW5CA9DQ3MQ3PTT20E7V29E9DDSRT2052ZTZL0QU67KASC5KJ0CZXE4GQQGSSQQQQQQQLGQQQQQQGQ9QRZJQ0TY33DGN88PMJN8W7N8Q3NA9LWWHDGSV9L0HUWH26E2DR7SW6N97ZG8VSQQV6GQQYQQQYUGQQQQN3QQ9QRZJQ0MJ6YVRMDE4XGYY6L5JJZNCUD48J6ENGEMM9A5TCSCJME8CNKWGQZGT5UQQP5CQQYQQQQLGQQQQQQGQ9QUAVQC5HLHWW5YP5YW22F09SEKNTZRAAMUEJDA66KAT2QEAAM0TXSAE5TMCNPU85TM3LH40MZ8AAXUKWETVUZDKL5ST6EAHXNQM5VW4SP8A7V2H | wc -c
    1733

[Crypt-iQ]

Weird, do you guys me to check this one out and see if it's on lnd side? I'm updating the PR otto linked today and it might get in by 0.9 🤞