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_ETHEREUM>",
        "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>"
    }
}'

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_ETHEREUM>" // 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.)"
});

{
  "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_ETHEREUM>",
            "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>"
      }
    }
  }
}