# Use Cases (Examples)

## Use case A — FIAT -> FIAT (Payout)

1. `POST /quotes` with `railType=FIAT_FIAT`
2. `POST /payouts` with the beneficiary details and optional `quoteId`
3. Receive `payout.completed` via webhook


## Use case B — FIAT -> CRYPTO (Payment)

1. `POST /quotes` with `railType=FIAT_CRYPTO`
2. `POST /payments` (destination is a crypto address/handle/phone)
3. Receive `payment.succeeded` via webhook


## Use case C — CRYPTO -> FIAT (Off-ramp payout)

1. `POST /quotes` with `railType=CRYPTO_FIAT`
2. `POST /payouts` with beneficiary details
3. Receive `payout.completed` via webhook


## Use case D — CRYPTO -> CRYPTO (On-chain transfer)

1. (Optional) `POST /chain/estimate-fee`
2. `POST /payments` with `railType=CRYPTO_CRYPTO`
3. (If you manage signing) `POST /chain/tx/broadcast` with `signedTx`
4. Receive `payment.succeeded` via webhook (or poll tx status if your product does so)