OrchestrationSourceDto

amount
Type: number
required

For fiat, the local-currency amount the customer pays. For crypto, the amount of the asset they send.
kind
Type: "fiat" or "crypto"enum
required

fiat collects local currency; crypto accepts a digital asset. Either way it converts to your USDC balance.
asset_id
Type: string

The asset the customer sends, from GET /v1/orchestrate/assets (crypto source).

This alone says both what the asset is and which chain it is on, so symbol and network are not needed beside it — network describes a mobile-money network and is ignored here.
country
Type: string

Corridor country (fiat source).
currency
Type: string

Local currency paid in (fiat source).
customer_name
Type: string

Paying customer name (fiat bank).
method
Type: string

Pay-in method: bank, momo (fiat source).
network
Type: string

Mobile-money network (fiat momo).
phone_number
Type: string

Customer phone (fiat momo).
refund_to
Type: string

An address your customer can receive at, used only if the pay-in cannot complete.

Not necessarily the one they send from: a payment made from an exchange leaves an address they cannot be refunded at, and money returned there is gone. Ask them where they want a refund.

Required when you create an orchestration, and not before — a quote prices the same whatever address it would refund to, so there is no reason to have asked your customer for one yet.