curl --request POST \
  --url https://preview.kotanipay.com/api/v3/offramp \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "cryptoAmount": 123,
  "referenceId": "<string>",
  "senderAddress": "<string>",
  "callbackUrl": "<string>",
  "rateId": "<string>",
  "refundInitiated": true,
  "refundStatus": "<string>",
  "refundTransactionHash": "<string>",
  "refundAmount": 123
}
'

{
  "success": true,
  "message": "Offramp has been successfully created",
  "data": {
    "referenceId": "<string>",
    "fiatAmount": 123,
    "fiatTransactionAmount": 123,
    "cryptoAmount": 123,
    "customerKey": "<string>",
    "fiatWalletId": "<string>",
    "senderAddress": "<string>",
    "transactionHash": "<string>",
    "transactionHashAmount": 123,
    "status": "<string>",
    "onchainStatus": "<string>",
    "rate": {},
    "escrowAddress": "<string>",
    "usingIntegratedWallet": true,
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "onchainError": {},
    "transactionError": {}
  }
}