Improve LND functionality

[im-adithya]

LND currently misses some methods implemented by LDK, we have to make sure it's up to speed

[bumi]

which ones are missing?

[im-adithya]

Not exactly methods but functionality (minor things like this), I have to review the new changes in LDK (mostly channel related stuff)

Opened just to keep track of it.

[rolznz]

@im-adithya maybe it doesn't need a issue then, otherwise this will never be closed