Bikeshedding about Payments Vocabulary

[icebaker]

I'm doing an exercise describing the different ways of sending money through Lightning. The goal is to bring terms to be applied in a developer-user-friendly abstraction to interact with lnd, which does not necessarily need to stick to the words already existing internally.

I ended up with an initial table with the possible combinations and suggested vocabulary:

How	Payable	Through	Amount
spontaneous	indefinitely	amp	open
spontaneous	indefinitely	keysend	open
invoice	once	non-amp	fixed
invoice	once	non-amp	open
invoice	indefinitely	amp	fixed
invoice	indefinitely	amp	open

I'm still thinking about some alternatives:

How: Source, Origin, Approach, Method, Way, Technique, Procedure, Strategy, Mode, System, Intent, Purpose

• spontaneous: Unsolicited, Ad-hoc, Random
• invoice: Request, Billing, Receipt

Payable: Recurring, Reusable, Limited, Unique, One-time

• indefinitely: Infinite, Unlimited, Endless, Boundless
• once: One-time, Single, Sole, Unique, Static

Through: Technology, Protocol, System, Method, Technique

• non-amp: invoice, basic, standard

Amount: Value

• open: Flexible, Variable, User-determined, Customizable, Non-specific
• fixed: Specific, Set, Pre-determined, Established, Invariable

What do you think about my table? Would you suggest a different one? What would be your ideal table?