I try to create a lightning invoice for donations. I want my donors to be able to determine the amount themselves.
For my question I have looked for an answere in the internet. Unfortunately, my search results didn't help me.
As background could helb my Lightning Full Node (Umbrel) and Blue Wallet App. Of course I'm open for other software too.
Do you know a good tutorial or can you explain, what I have to do?
Edit: thanks @Sachin Meier. With your help I have found a kind of BOLT11-How-to. I have to confess that neither your explanation nor the How-to helps me. Could anybody provide a noob secure introduction please?