Four payment-flow concerns surfaced during the RN integration that
need explicit design decisions before scaling:
1. Rabby wallet unsupported by RN's hosted UI - mitigated by
bringing the checkout screen in-house.
2. RN auto-bridges cross-chain payments via LiFi, costing someone
money - mitigated by gating chain selection in our own UI based
on seller-accepted chains.
3. Single shared escrow wallet exposes the whole platform to
sanctioned-funds taint - needs per-escrow ephemeral wallets and
a wallet-abstraction layer.
4. The above pushes RN into a notification-only role - viable but
needs validation tests (webhook reliability, custom destinations,
API-only pricing) before commitment.
