is that this particular to LND or do different implementations do the identical?
Different implementations additionally ship these.
if that’s the case, it might make sense to offer routing hints even for public channels, simply to sign that they’ve enough steadiness. Is that this allowed and do implementations do that?
It would make sense, I’ve thought of concepts the place you may sign which channels you’d favor fee by way of even when they’re public. From the senders viewpoint they would not have the ability to inform what’s most handy for the recipient, so this might assist alleviate points.
if a sure vacation spot needs to obtain 100 satoshis and has 10 non-public channels which have a distant steadiness of 99 satoshis every, does this imply no routing hints might be supplied, as a result of no single channel can route the whole quantity by itself, so the fee will fail, despite the fact that the fee is possible utilizing a multi path fee?
LND tries to offer no less than 20 channels to facilitate fee to a non-public/arduous to seek out node. If the quantity of top quality channels is decrease than 20, LND will choose as many low high quality channels as attainable (with out doxxing different non-public nodes) to satisfy that 20 channel requirement.
To simplify, it should present all these 99 sat channels.
One other thought of be aware – all hophints are designed to do is add extra edges to the senders’s graph, in case their graph would not have the knowledge required to path to the recipient.
I wrote a brief weblog about hophints just a few months again, possibly you will discover it attention-grabbing!
https://write.as/arshbot/everything-you-need-to-know-about-hop-hints-in-the-lightning-network