The fetchOnrampOptions utility retrieves supported fiat currencies and available crypto assets for a specific country. This information is essential for determining which assets can be purchased in the user’s jurisdiction.

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Usage

import { fetchOnrampOptions } from '@coinbase/onchainkit/fund';

const options = await fetchOnrampOptions({
country: 'US',
subdivision: 'CA', // Required for US residents
apiKey: 'your-api-key', // Required when using without OnchainKitProvider or in non-React environment
});

​
Parameters

{
  /**
   * ISO 3166-1 two-letter country code string representing
   * the purchasing user’s country of residence, e.g., US.
   */
  country: string;
  /**
   * ISO 3166-2 two-letter country subdivision code representing
   * the purchasing user’s subdivision of residence within their country,
   * e.g. NY. Required if the country=“US” because certain states (e.g., NY)
   * have state specific asset restrictions.
   */
  subdivision?: string;
  /**
   * Optional API key for Coinbase Onramp. If not provided, the API key from
   * OnchainKitProvider will be used. Required when using the utility without
   * OnchainKitProvider or in a non-React environment.
   */
  apiKey?: string;
}

​
Returns

Promise<OnrampOptionsResponseData> - Returns a promise that resolves to the available options for the specified location. 
type OnrampOptionsResponseData = {
  /**
   * List of supported fiat currencies that can be exchanged for crypto on Onramp in the given location.
   * Each currency contains a list of available payment methods, with min and max transaction limits for that currency.
   */
  paymentCurrencies: OnrampPaymentCurrency[];
  /**
   * List of available crypto assets that can be bought on Onramp in the given location.
   */
  purchaseCurrencies: OnrampPurchaseCurrency[];
};

type OnrampPurchaseCurrency = {
  id: string;
  name: string;
  symbol: string;
  iconUrl: string;
  networks: OnrampNetwork[];
};

type OnrampPaymentCurrency = {
  id: string;
  limits: OnrampPaymentMethodLimit[];
  iconUrl: string;
};

type OnrampPaymentMethodLimit = {
  id: string;
  min: string;
  max: string;
};

type OnrampNetwork = {
  name: string;
  displayName: string;
  chainId: string;
  contractAddress: string;
};