session-flow: add session payment algorithms structure

[asurkov]

No description provided.

[sidvishnoi]

In the extension's algorithm (specially when dealing with cross currency payments), there's a concept of "bucket" which fills according to user's rate of pay, and when there is enough in the bucket to be sent for next session in queue, the bucket empties and sends that amount to sessions. I don't see such thing in this algorithm here. Do you plan to handle cross currency scenarios later and keeping it simple for now?

[asurkov]

In the extension's algorithm (specially when dealing with cross currency payments), there's a concept of "bucket" which fills according to user's rate of pay, and when there is enough in the bucket to be sent for next session in queue, the bucket empties and sends that amount to sessions. I don't see such thing in this algorithm here. Do you plan to handle cross currency scenarios later and keeping it simple for now?

Yeah, the idea is to keep it intentionally basic for now and then implement all improvements on top of it.