> ## Documentation Index
> Fetch the complete documentation index at: https://docs.turnkey.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Init fiat on ramp

> Initiate a fiat on ramp flow.

export const EndpointPath = ({type, path}) => {
  return <div class="flex w-full flex-col bg-background-light dark:bg-background-dark border-standard rounded-2xl p-1.5">
      <div class="flex items-center space-x-1.5">
        <div class="relative flex-1 flex gap-2 min-w-0 rounded-xl items-center cursor-pointer p-1.5 border-standard">
          <div class="rounded-lg font-bold px-1.5 py-0.5 text-sm leading-5 bg-blue-400/20 dark:bg-blue-400/20 text-blue-700 dark:text-blue-400">
            POST
          </div>
          <div class="flex items-center space-x-2 overflow-x-auto flex-1 no-scrollbar">
            <div class="group flex items-center flex-1 gap-0.5 font-mono">
              <div class="absolute right-0 p-2 bg-background-light dark:bg-background-dark rounded-lg hidden group-hover:block">
                <svg class="w-4 h-4 bg-gray-400 dark:bg-white/30"></svg>
              </div>
              <div class="text-sm text-gray-400">/</div>
              <div class="text-sm font-medium text-gray-800 dark:text-white min-w-max">
                public
              </div>
              <div class="text-sm text-gray-400">/</div>
              <div class="text-sm font-medium text-gray-800 dark:text-white min-w-max">
                v1
              </div>
              <div class="text-sm text-gray-400">/</div>
              <div class="text-sm font-medium text-gray-800 dark:text-white min-w-max">
                {type}
              </div>
              <div class="text-sm text-gray-400">/</div>
              <div class="text-sm font-medium text-gray-800 dark:text-white min-w-max">
                {path}
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>;
};

export const NestedParam = ({parentKey, childKey, type, required, description, children}) => {
  const fullKey = `${parentKey}.${childKey}`;
  const anchorId = `body-${fullKey.replace(/\./g, '-')}`;
  return <div className="py-6 border-gray-100 dark:border-gray-800 border-b last:border-b-0">
  <div className="flex font-mono text-sm group/param-head param-head break-all relative" id={anchorId}>
    <div className="flex-1 flex content-start py-0.5 mr-5">
      <div className="flex items-center flex-wrap gap-2">
        <div className="absolute -top-1.5">
          <a href={`#${anchorId}`} className="-ml-[2.1rem] flex items-center opacity-0 border-0 group-hover/param-head:opacity-100 py-2 [.expandable-content_&]:-ml-[2.1rem]" aria-label="Navigate to header">
            <div className="w-6 h-6 text-gray-400 rounded-md flex items-center justify-center zinc-box bg-white ring-1 ring-gray-400/30 dark:ring-gray-700/25 hover:ring-gray-400/60 dark:hover:ring-white/20">
              <svg xmlns="http://www.w3.org/2000/svg" fill="gray" height="12px" viewBox="0 0 576 512">
                <path d="M0 256C0 167.6 71.6 96 160 96h72c13.3 0 24 10.7 24 24s-10.7 24-24 24H160C98.1 144 48 194.1 48 256s50.1 112 112 112h72c13.3 0 24 10.7 24 24s-10.7 24-24 24H160C71.6 416 0 344.4 0 256zm576 0c0 88.4-71.6 160-160 160H344c-13.3 0-24-10.7-24-24s10.7-24 24-24h72c61.9 0 112-50.1 112-112s-50.1-112-112-112H344c-13.3 0-24-10.7-24-24s10.7-24 24-24h72c88.4 0 160 71.6 160 160zM184 232H392c13.3 0 24 10.7 24 24s-10.7 24-24 24H184c-13.3 0-24-10.7-24-24s10.7-24 24-24z"></path>
              </svg>
            </div>
          </a>
        </div>
        <div className="font-semibold text-primary dark:text-primary-light cursor-pointer overflow-wrap-anywhere">
          <span className="text-gray-500 dark:text-gray-400">{parentKey}.</span>
          {childKey}
        </div>
        <div className="inline items-center gap-2 text-xs font-medium [&_div]:inline [&_div]:mr-2 [&_div]:leading-5">
          <div className="flex items-center px-2 py-0.5 rounded-md bg-gray-100/50 dark:bg-white/5 text-gray-600 dark:text-gray-200 font-medium break-all">
            <span>{type}</span>
          </div>
          {required && <span className="px-2 py-0.5 rounded-md bg-red-100/50 dark:bg-red-400/10 text-red-600 dark:text-red-300 font-medium whitespace-nowrap">
              required
            </span>}
        </div>
      </div>
    </div>
  </div>
  {children && <div className="mt-4">
      <div className="prose prose-sm prose-gray dark:prose-invert">
        {children}
      </div>
    </div>}
</div>;
};

export const H3Bordered = ({text}) => <h3 id={text.toLowerCase()} className="border-b pb-2.5 border-gray-100 dark:border-gray-800">
    {text}
  </h3>;

export const Authorizations = () => {
  return <div>
      <H3Bordered text="Authorizations" />

      <Tabs>
        <Tab title="API Key">
          <div className="flex text-sm group/param-head param-head break-all relative" id="authorization-x-stamp">
            <ParamField header="X-Stamp" type="string" required={true}>
              Cryptographically signed (stamped) request to be passed in as a header. For more info, see <a href="https://docs.turnkey.com/developer-reference/api-overview/stamps">here</a>.
            </ParamField>
          </div>
        </Tab>

        <Tab title="WebAuthn (Passkey)">
         <div className="flex text-sm group/param-head param-head break-all relative" id="authorization-x-stamp-webauthn">
            <ParamField body="X-Stamp-WebAuthn" type="string" required={true}>
              Cryptographically signed (stamped) request to be passed in as a header. For more info, see <a href="https://docs.turnkey.com/developer-reference/api-overview/stamps">here</a>.
            </ParamField>
          </div>
        </Tab>
      </Tabs>
    </div>;
};

<EndpointPath type="submit" path="init_fiat_on_ramp" />

<Authorizations />

<H3Bordered text="Body" />

<ParamField body="type" type="enum<string>" required={true}>
  Enum options: `ACTIVITY_TYPE_INIT_FIAT_ON_RAMP`
</ParamField>

<ParamField body="timestampMs" type="string" required={true}>
  Timestamp (in milliseconds) of the request, used to verify liveness of user requests.
</ParamField>

<ParamField body="organizationId" type="string" required={true}>
  Unique identifier for a given Organization.
</ParamField>

<ParamField body="parameters" type="object" required={true} path="parameters">
  <p>The parameters object containing the specific intent data for this activity.</p>

  <Expandable title="details">
    <NestedParam parentKey="parameters" childKey="onrampProvider" type="enum<string>" required={true} default="">
      Enum options: `FIAT_ON_RAMP_PROVIDER_COINBASE`, `FIAT_ON_RAMP_PROVIDER_MOONPAY`
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="walletAddress" type="string" required={true} default="">
      Destination wallet address for the buy transaction.
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="network" type="enum<string>" required={true} default="">
      Enum options: `FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_BITCOIN`, `FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_ETHEREUM`, `FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_SOLANA`, `FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_BASE`
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="cryptoCurrencyCode" type="enum<string>" required={true} default="">
      Enum options: `FIAT_ON_RAMP_CRYPTO_CURRENCY_BTC`, `FIAT_ON_RAMP_CRYPTO_CURRENCY_ETH`, `FIAT_ON_RAMP_CRYPTO_CURRENCY_SOL`, `FIAT_ON_RAMP_CRYPTO_CURRENCY_USDC`
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="fiatCurrencyCode" type="enum<string>" required={false} default="">
      Enum options: `FIAT_ON_RAMP_CURRENCY_AUD`, `FIAT_ON_RAMP_CURRENCY_BGN`, `FIAT_ON_RAMP_CURRENCY_BRL`, `FIAT_ON_RAMP_CURRENCY_CAD`, `FIAT_ON_RAMP_CURRENCY_CHF`, `FIAT_ON_RAMP_CURRENCY_COP`, `FIAT_ON_RAMP_CURRENCY_CZK`, `FIAT_ON_RAMP_CURRENCY_DKK`, `FIAT_ON_RAMP_CURRENCY_DOP`, `FIAT_ON_RAMP_CURRENCY_EGP`, `FIAT_ON_RAMP_CURRENCY_EUR`, `FIAT_ON_RAMP_CURRENCY_GBP`, `FIAT_ON_RAMP_CURRENCY_HKD`, `FIAT_ON_RAMP_CURRENCY_IDR`, `FIAT_ON_RAMP_CURRENCY_ILS`, `FIAT_ON_RAMP_CURRENCY_JOD`, `FIAT_ON_RAMP_CURRENCY_KES`, `FIAT_ON_RAMP_CURRENCY_KWD`, `FIAT_ON_RAMP_CURRENCY_LKR`, `FIAT_ON_RAMP_CURRENCY_MXN`, `FIAT_ON_RAMP_CURRENCY_NGN`, `FIAT_ON_RAMP_CURRENCY_NOK`, `FIAT_ON_RAMP_CURRENCY_NZD`, `FIAT_ON_RAMP_CURRENCY_OMR`, `FIAT_ON_RAMP_CURRENCY_PEN`, `FIAT_ON_RAMP_CURRENCY_PLN`, `FIAT_ON_RAMP_CURRENCY_RON`, `FIAT_ON_RAMP_CURRENCY_SEK`, `FIAT_ON_RAMP_CURRENCY_THB`, `FIAT_ON_RAMP_CURRENCY_TRY`, `FIAT_ON_RAMP_CURRENCY_TWD`, `FIAT_ON_RAMP_CURRENCY_USD`, `FIAT_ON_RAMP_CURRENCY_VND`, `FIAT_ON_RAMP_CURRENCY_ZAR`
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="fiatCurrencyAmount" type="string" required={false} default="">
      Specifies a preset fiat amount for the transaction, e.g., '100'. Must be greater than '20'. If not provided, the user will be prompted to enter an amount.
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="paymentMethod" type="enum<string>" required={false} default="">
      Enum options: `FIAT_ON_RAMP_PAYMENT_METHOD_CREDIT_DEBIT_CARD`, `FIAT_ON_RAMP_PAYMENT_METHOD_APPLE_PAY`, `FIAT_ON_RAMP_PAYMENT_METHOD_GBP_BANK_TRANSFER`, `FIAT_ON_RAMP_PAYMENT_METHOD_GBP_OPEN_BANKING_PAYMENT`, `FIAT_ON_RAMP_PAYMENT_METHOD_GOOGLE_PAY`, `FIAT_ON_RAMP_PAYMENT_METHOD_SEPA_BANK_TRANSFER`, `FIAT_ON_RAMP_PAYMENT_METHOD_PIX_INSTANT_PAYMENT`, `FIAT_ON_RAMP_PAYMENT_METHOD_PAYPAL`, `FIAT_ON_RAMP_PAYMENT_METHOD_VENMO`, `FIAT_ON_RAMP_PAYMENT_METHOD_MOONPAY_BALANCE`, `FIAT_ON_RAMP_PAYMENT_METHOD_CRYPTO_ACCOUNT`, `FIAT_ON_RAMP_PAYMENT_METHOD_FIAT_WALLET`, `FIAT_ON_RAMP_PAYMENT_METHOD_ACH_BANK_ACCOUNT`
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="countryCode" type="string" required={false} default="">
      ISO 3166-1 two-digit country code for Coinbase representing the purchasing user’s country of residence, e.g., US, GB.
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="countrySubdivisionCode" type="string" required={false} default="">
      ISO 3166-2 two-digit country subdivision code for Coinbase representing the purchasing user’s subdivision of residence within their country, e.g. NY. Required if country\_code=US.
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="sandboxMode" type="boolean" required={false} default="">
      Optional flag to indicate whether to use the sandbox mode to simulate transactions for the on-ramp provider. Default is false.
    </NestedParam>

    <NestedParam parentKey="parameters" childKey="urlForSignature" type="string" required={false} default="">
      Optional MoonPay Widget URL to sign when using MoonPay client SDKs with URL Signing enabled.
    </NestedParam>
  </Expandable>
</ParamField>

<ParamField body="generateAppProofs" type="boolean" required={false}>
  Enable to have your activity generate and return App Proofs, enabling verifiability.
</ParamField>

<H3Bordered text="Response" />

A successful response returns the following fields:

<ResponseField name="activity" type="object" required={true}>
  The activity object containing type, intent, and result

  <Expandable title="activity details">
    <NestedParam parentKey="activity" childKey="id" type="string" required={true}>
      Unique identifier for a given Activity object.
    </NestedParam>

    <NestedParam parentKey="activity" childKey="organizationId" type="string" required={true}>
      Unique identifier for a given Organization.
    </NestedParam>

    <NestedParam parentKey="activity" childKey="status" type="string" required={true}>
      The activity status
    </NestedParam>

    <NestedParam parentKey="activity" childKey="type" type="string" required={true}>
      The activity type
    </NestedParam>

    <NestedParam parentKey="activity" childKey="intent" type="object" required={true}>
      The intent of the activity

      <Expandable title="intent details">
        <NestedParam parentKey="activity.intent" childKey="initFiatOnRampIntent" type="object" required={true}>
          The initFiatOnRampIntent object

          <Expandable title="initFiatOnRampIntent details">
            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="onrampProvider" type="enum" required={true}>
              onrampProvider field

              Enum options: `FIAT_ON_RAMP_PROVIDER_COINBASE`, `FIAT_ON_RAMP_PROVIDER_MOONPAY`
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="walletAddress" type="string" required={true}>
              Destination wallet address for the buy transaction.
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="network" type="enum" required={true}>
              network field

              Enum options: `FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_BITCOIN`, `FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_ETHEREUM`, `FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_SOLANA`, `FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_BASE`
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="cryptoCurrencyCode" type="enum" required={true}>
              cryptoCurrencyCode field

              Enum options: `FIAT_ON_RAMP_CRYPTO_CURRENCY_BTC`, `FIAT_ON_RAMP_CRYPTO_CURRENCY_ETH`, `FIAT_ON_RAMP_CRYPTO_CURRENCY_SOL`, `FIAT_ON_RAMP_CRYPTO_CURRENCY_USDC`
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="fiatCurrencyCode" type="enum" required={false}>
              fiatCurrencyCode field

              Enum options: `FIAT_ON_RAMP_CURRENCY_AUD`, `FIAT_ON_RAMP_CURRENCY_BGN`, `FIAT_ON_RAMP_CURRENCY_BRL`, `FIAT_ON_RAMP_CURRENCY_CAD`, `FIAT_ON_RAMP_CURRENCY_CHF`, `FIAT_ON_RAMP_CURRENCY_COP`, `FIAT_ON_RAMP_CURRENCY_CZK`, `FIAT_ON_RAMP_CURRENCY_DKK`, `FIAT_ON_RAMP_CURRENCY_DOP`, `FIAT_ON_RAMP_CURRENCY_EGP`, `FIAT_ON_RAMP_CURRENCY_EUR`, `FIAT_ON_RAMP_CURRENCY_GBP`, `FIAT_ON_RAMP_CURRENCY_HKD`, `FIAT_ON_RAMP_CURRENCY_IDR`, `FIAT_ON_RAMP_CURRENCY_ILS`, `FIAT_ON_RAMP_CURRENCY_JOD`, `FIAT_ON_RAMP_CURRENCY_KES`, `FIAT_ON_RAMP_CURRENCY_KWD`, `FIAT_ON_RAMP_CURRENCY_LKR`, `FIAT_ON_RAMP_CURRENCY_MXN`, `FIAT_ON_RAMP_CURRENCY_NGN`, `FIAT_ON_RAMP_CURRENCY_NOK`, `FIAT_ON_RAMP_CURRENCY_NZD`, `FIAT_ON_RAMP_CURRENCY_OMR`, `FIAT_ON_RAMP_CURRENCY_PEN`, `FIAT_ON_RAMP_CURRENCY_PLN`, `FIAT_ON_RAMP_CURRENCY_RON`, `FIAT_ON_RAMP_CURRENCY_SEK`, `FIAT_ON_RAMP_CURRENCY_THB`, `FIAT_ON_RAMP_CURRENCY_TRY`, `FIAT_ON_RAMP_CURRENCY_TWD`, `FIAT_ON_RAMP_CURRENCY_USD`, `FIAT_ON_RAMP_CURRENCY_VND`, `FIAT_ON_RAMP_CURRENCY_ZAR`
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="fiatCurrencyAmount" type="string" required={false}>
              Specifies a preset fiat amount for the transaction, e.g., '100'. Must be greater than '20'. If not provided, the user will be prompted to enter an amount.
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="paymentMethod" type="enum" required={false}>
              paymentMethod field

              Enum options: `FIAT_ON_RAMP_PAYMENT_METHOD_CREDIT_DEBIT_CARD`, `FIAT_ON_RAMP_PAYMENT_METHOD_APPLE_PAY`, `FIAT_ON_RAMP_PAYMENT_METHOD_GBP_BANK_TRANSFER`, `FIAT_ON_RAMP_PAYMENT_METHOD_GBP_OPEN_BANKING_PAYMENT`, `FIAT_ON_RAMP_PAYMENT_METHOD_GOOGLE_PAY`, `FIAT_ON_RAMP_PAYMENT_METHOD_SEPA_BANK_TRANSFER`, `FIAT_ON_RAMP_PAYMENT_METHOD_PIX_INSTANT_PAYMENT`, `FIAT_ON_RAMP_PAYMENT_METHOD_PAYPAL`, `FIAT_ON_RAMP_PAYMENT_METHOD_VENMO`, `FIAT_ON_RAMP_PAYMENT_METHOD_MOONPAY_BALANCE`, `FIAT_ON_RAMP_PAYMENT_METHOD_CRYPTO_ACCOUNT`, `FIAT_ON_RAMP_PAYMENT_METHOD_FIAT_WALLET`, `FIAT_ON_RAMP_PAYMENT_METHOD_ACH_BANK_ACCOUNT`
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="countryCode" type="string" required={false}>
              ISO 3166-1 two-digit country code for Coinbase representing the purchasing user’s country of residence, e.g., US, GB.
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="countrySubdivisionCode" type="string" required={false}>
              ISO 3166-2 two-digit country subdivision code for Coinbase representing the purchasing user’s subdivision of residence within their country, e.g. NY. Required if country\_code=US.
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="sandboxMode" type="boolean" required={false}>
              Optional flag to indicate whether to use the sandbox mode to simulate transactions for the on-ramp provider. Default is false.
            </NestedParam>

            <NestedParam parentKey="activity.intent.initFiatOnRampIntent" childKey="urlForSignature" type="string" required={false}>
              Optional MoonPay Widget URL to sign when using MoonPay client SDKs with URL Signing enabled.
            </NestedParam>
          </Expandable>
        </NestedParam>
      </Expandable>
    </NestedParam>

    <NestedParam parentKey="activity" childKey="result" type="object" required={true}>
      The result of the activity

      <Expandable title="result details">
        <NestedParam parentKey="activity.result" childKey="initFiatOnRampResult" type="object" required={true}>
          The initFiatOnRampResult object

          <Expandable title="initFiatOnRampResult details">
            <NestedParam parentKey="activity.result.initFiatOnRampResult" childKey="onRampUrl" type="string" required={true}>
              Unique URL for a given fiat on-ramp flow.
            </NestedParam>

            <NestedParam parentKey="activity.result.initFiatOnRampResult" childKey="onRampTransactionId" type="string" required={true}>
              Unique identifier used to retrieve transaction statuses for a given fiat on-ramp flow.
            </NestedParam>

            <NestedParam parentKey="activity.result.initFiatOnRampResult" childKey="onRampUrlSignature" type="string" required={false}>
              Optional signature of the MoonPay Widget URL. The signature is generated if the Init Fiat On Ramp intent includes the urlForSignature field. The signature can be used to initialize the MoonPay SDKs when URL signing is enabled for your project.
            </NestedParam>
          </Expandable>
        </NestedParam>
      </Expandable>
    </NestedParam>

    <NestedParam parentKey="activity" childKey="votes" type="array" required={true}>
      A list of objects representing a particular User's approval or rejection of a Consensus request, including all relevant metadata.
    </NestedParam>

    <NestedParam parentKey="activity" childKey="fingerprint" type="string" required={true}>
      An artifact verifying a User's action.
    </NestedParam>

    <NestedParam parentKey="activity" childKey="canApprove" type="boolean" required={true}>
      Whether the activity can be approved.
    </NestedParam>

    <NestedParam parentKey="activity" childKey="canReject" type="boolean" required={true}>
      Whether the activity can be rejected.
    </NestedParam>

    <NestedParam parentKey="activity" childKey="createdAt" type="string" required={true}>
      The creation timestamp.
    </NestedParam>

    <NestedParam parentKey="activity" childKey="updatedAt" type="string" required={true}>
      The last update timestamp.
    </NestedParam>
  </Expandable>
</ResponseField>

<RequestExample>
  ```bash title="cURL" theme={"system"}
  curl --request POST \
    --url https://api.turnkey.com/public/v1/submit/init_fiat_on_ramp \
    --header 'Accept: application/json' \
    --header 'Content-Type: application/json' \
    --header "X-Stamp: <string> (see Authorizations)" \
    --data '{
      "type": "ACTIVITY_TYPE_INIT_FIAT_ON_RAMP",
      "timestampMs": "<string> (e.g. 1746736509954)",
      "organizationId": "<string> (Your Organization ID)",
      "parameters": {
          "onrampProvider": "<FIAT_ON_RAMP_PROVIDER_COINBASE>",
          "walletAddress": "<string>",
          "network": "<FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_BITCOIN>",
          "cryptoCurrencyCode": "<FIAT_ON_RAMP_CRYPTO_CURRENCY_BTC>",
          "fiatCurrencyCode": "<FIAT_ON_RAMP_CURRENCY_AUD>",
          "fiatCurrencyAmount": "<string>",
          "paymentMethod": "<FIAT_ON_RAMP_PAYMENT_METHOD_CREDIT_DEBIT_CARD>",
          "countryCode": "<string>",
          "countrySubdivisionCode": "<string>",
          "sandboxMode": "<boolean>",
          "urlForSignature": "<string>"
      }
  }'
  ```

  ```javascript title="JavaScript" theme={"system"}
  import { Turnkey } from "@turnkey/sdk-server";

  const turnkeyClient = new Turnkey({
    apiBaseUrl: "https://api.turnkey.com",
    apiPublicKey: process.env.API_PUBLIC_KEY!,
    apiPrivateKey: process.env.API_PRIVATE_KEY!,
    defaultOrganizationId: process.env.ORGANIZATION_ID!,
  });

  const response = await turnkeyClient.apiClient().initFiatOnRamp({
    onrampProvider: "<FIAT_ON_RAMP_PROVIDER_COINBASE>" // onrampProvider field,
    walletAddress: "<string> (Destination wallet address for the buy transaction.)",
    network: "<FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_BITCOIN>" // network field,
    cryptoCurrencyCode: "<FIAT_ON_RAMP_CRYPTO_CURRENCY_BTC>" // cryptoCurrencyCode field,
    fiatCurrencyCode: "<FIAT_ON_RAMP_CURRENCY_AUD>" // fiatCurrencyCode field,
    fiatCurrencyAmount: "<string> (Specifies a preset fiat amount for the transaction, e.g., '100'. Must be greater than '20'. If not provided, the user will be prompted to enter an amount.)",
    paymentMethod: "<FIAT_ON_RAMP_PAYMENT_METHOD_CREDIT_DEBIT_CARD>" // paymentMethod field,
    countryCode: "<string> (ISO 3166-1 two-digit country code for Coinbase representing the purchasing user’s country of residence, e.g., US, GB.)",
    countrySubdivisionCode: "<string> (ISO 3166-2 two-digit country subdivision code for Coinbase representing the purchasing user’s subdivision of residence within their country, e.g. NY. Required if country_code=US.)",
    sandboxMode: true // Optional flag to indicate whether to use the sandbox mode to simulate transactions for the on-ramp provider. Default is false.,
    urlForSignature: "<string> (Optional MoonPay Widget URL to sign when using MoonPay client SDKs with URL Signing enabled.)"
  });
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={"system"}
  {
    "activity": {
      "id": "<activity-id>",
      "status": "ACTIVITY_STATUS_COMPLETED",
      "type": "ACTIVITY_TYPE_INIT_FIAT_ON_RAMP",
      "organizationId": "<organization-id>",
      "timestampMs": "<timestamp> (e.g. 1746736509954)",
      "result": {
        "activity": {
          "id": "<string>",
          "organizationId": "<string>",
          "status": "<string>",
          "type": "<string>",
          "intent": {
            "initFiatOnRampIntent": {
              "onrampProvider": "<FIAT_ON_RAMP_PROVIDER_COINBASE>",
              "walletAddress": "<string>",
              "network": "<FIAT_ON_RAMP_BLOCKCHAIN_NETWORK_BITCOIN>",
              "cryptoCurrencyCode": "<FIAT_ON_RAMP_CRYPTO_CURRENCY_BTC>",
              "fiatCurrencyCode": "<FIAT_ON_RAMP_CURRENCY_AUD>",
              "fiatCurrencyAmount": "<string>",
              "paymentMethod": "<FIAT_ON_RAMP_PAYMENT_METHOD_CREDIT_DEBIT_CARD>",
              "countryCode": "<string>",
              "countrySubdivisionCode": "<string>",
              "sandboxMode": "<boolean>",
              "urlForSignature": "<string>"
            }
          },
          "result": {
            "initFiatOnRampResult": {
              "onRampUrl": "<string>",
              "onRampTransactionId": "<string>",
              "onRampUrlSignature": "<string>"
            }
          },
          "votes": "<array>",
          "fingerprint": "<string>",
          "canApprove": "<boolean>",
          "canReject": "<boolean>",
          "createdAt": "<string>",
          "updatedAt": "<string>"
        }
      }
    }
  }
  ```
</ResponseExample>