So what happens when the amount paid for a lightning invoice is not the same as the amount invoiced? Does the transaction go through or fail?
My understanding is that an invoice requires the specific amount of bitcoin (or coin) to be paid. I understand that if any other amount is attempted to be paid, the transaction will not be valid.
The reason for this is that both parties to a channel need to agree on the proposed new channel balance and the specific new channel balance amount needs to be known in advance.