| KYC | Know Your Customer — identity verification, gated by level (0–2+). |
| Mock mode | API layer returns local fixtures instead of calling the network; same response shape as live mode. |
| Remote config | Backend-served feature/nav flags the mobile app merges over its local defaults. |
| Idempotency key | Client-generated clientTransactionId attached to financial requests to prevent duplicate submission. |
| Deep link | A nairaexchange:// URL that opens the app directly to a specific screen. |
| Device detection | Website utility that routes Login/Get Started to the right store or a QR modal. |