Implement one-time deposit addresses

[Savio-Sou]

Problem

Deposits to a Payy account currently goes through one public (Polygon PoS) address. This renders deposits from different sources into the same Payy account easily linkable.

Happy Case

Implement one-time deposit addresses, where the app suggests a new deposit address once it is aware that a deposit was performed on the previous one.

Used deposit addresses should still be supported though, in case users intuitively / prefer depositing assets through the same address.

[calummoore]

Yes, we actually had plans for something like this (and also multiple request links). The only challenge is that if a user has too many, then checking them all might slow down the app.