Dear All Smart Contract Developers,
I am an amateur in this space and would greatly appreciate your help in helping me understand certain concepts from this documentation (Uni-Directional Payment Channel).
In this documentation, it states that "
Alice authorizes a payment by signing a message (off chain) and sends the signature to
Bob". I am unsure what it means by signing a message (off chain) in this case, is there a function I am supposed to create or what am I supposed to do?
I sincerely apologise for my inept in this field!