ISO 4217 currency code of the currency that will be used for the purchase.
The amount of the base currency to spend; pass an empty string if the user selected cryptocurrency_amount.
The cryptocurrency that will be bought.
The amount of the cryptocurrency to buy; pass an empty string if the user selected base_currency_amount.
Name of the chosen payment method; pass an empty string if none.
Unique identifier of the on-ramp provider.
Returns a quote for an on-ramp payment; only for providers that supports quote retrieval. Request type for Tdjson#getOnRampPaymentQuote.