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Scenario

A user wants to sell Bitcoin (via Lightning Network) and receive cash in their local bank account (e.g., Brazil PIX) immediately using a single streamlined flow.

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Workflow

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1. Add Beneficiary Bank Account

First, add the destination bank account as a beneficiary. This is where the funds will be sent after the crypto is received.
See the Add Beneficiary API reference for full details.
curl --request POST \
  --url https://api.bullring.finance/v1/ramp/{subaccountId}/banking/beneficiaries \
  --header 'Content-Type: application/json' \
  --header 'Authorization: Bearer <token>' \
  --data '{
  "account_id": "667.136.083-96",
  "account_type": "cpf",
  "currency": "BRL"
}'
Response: 
{
  "id": "343bb162-d0ae-46ef-a5bb-13505eb52c89",
  "account_id": "667.136.083-96",
  "account_type": "cpf",
  "currency": "BRL",
  "status": "active",
  "created_at": "2025-11-25T12:00:00.000Z"
}

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2. Initiate Crypto Offramp

Initiate the offramp by specifying the recipient (beneficiary ID) and the amount in the destination currency. The API will generate a Lightning invoice that the user needs to pay.
See the Offramp Crypto API reference for full details.
curl --request POST \
  --url https://api.bullring.finance/v1/ramp/{subaccountId}/banking/offramp/initiate \
  --header 'Content-Type: application/json' \
  --header 'Authorization: Bearer <token>' \
  --data '{
  "recipient_id": "343bb162-d0ae-46ef-a5bb-13505eb52c89",
  "amount": 88
}'
Response: 
{
  "success": true,
  "data": {
    "id": "d79c9799-bb8e-4c17-9d5a-79fefa34484f",
    "lightningInvoice": "lntbs190270n1p5jtvf2pp53pk7mdfvc9d8szp7m0kpym4q5j8axwy6zk7j8ylk03j6vn24cv6sdqqcqzpuxqzfvsp5phce46p7sk0dyejc2wnn0c0vcehdwa8p4fugj734rvy6eed7g2ds9qxpqysgqlas9q8el7l57vn7ht84tqha22c53s5797uqtv70lsn55xa9rhe53l0z2ashzeq9jcz54wkczzyqznqeunthfw4cnyjp3v2y7vha6yxspe0u76h",
    "lightningInvoiceId": "d0abc66e-9ab3-43b7-bb07-09465a048d54",
    "targetAmount": 88,
    "targetCurrency": "brl",
    "lightningAmount": 1656,
    "lightningCurrency": "stablesats",
    "exchangeRate": 0.18822915501882292,
    "lightningFee": 0,
    "withdrawalFee": 0.64,
    "targetAmountReceivable": 87.34,
    "totalFees": 0.64,
    "bankAccount": {
      "id": "343bb162-d0ae-46ef-a5bb-13505eb52c89",
      "bankName": null,
      "accountId": "667.136.083-96",
      "currency": "BRL"
    },
    "expiresAt": null,
    "status": "pending",
    "createdAt": "2025-11-25T13:37:46.829Z"
  },
  "message": "Lightning invoice generated. Pay to receive funds in your bank account."
}
Key Response Fields:
  • lightningInvoice - The Lightning invoice that the user needs to pay
  • lightningAmount - The amount of satoshis to pay
  • targetAmountReceivable - The amount the user will receive (after fees)
  • totalFees - Total fees charged for the transaction

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3. User Pays Lightning Invoice

The user pays the Lightning invoice using their Bitcoin Lightning wallet. Once the invoice is paid, Bullring automatically processes the withdrawal to the beneficiary’s bank account.

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4. Check Offramp Status

You can check the status of the offramp transaction at any time using the offramp ID.
See the Get Offramp Status API reference for full details.
curl --request GET \
  --url https://api.bullring.finance/v1/ramp/{subaccountId}/banking/offramp/{offrampId}/status \
  --header 'Authorization: Bearer <token>'
Response: 
{
  "success": true,
  "data": {
    "id": "6b32169e-c20e-49c9-aa7f-b73fe863c231",
    "status": "pending",
    "targetAmount": 12,
    "targetCurrency": "brl",
    "lightningAmount": 226,
    "withdrawalId": null,
    "invoicePaidAt": null,
    "withdrawalInitiatedAt": null,
    "completedAt": null,
    "errorMessage": null,
    "createdAt": "2025-11-25T13:48:02.667Z",
    "updatedAt": "2025-11-25T13:48:02.667Z",
    "lightningCurrency": "stablesats",
    "exchangeRate": 0.18822916,
    "lightningFee": 0,
    "withdrawalFee": 0.11,
    "targetAmountReceivable": 53.09,
    "totalFees": 0.11
  }
}
Status Values:
  • pending - Waiting for Lightning invoice to be paid
  • processing - Invoice paid, withdrawal being processed
  • completed - Funds successfully sent to beneficiary
  • failed - Transaction failed (see errorMessage for details)

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Advantages

This streamlined offramp flow offers several benefits:
  • Single API Call: Generate the Lightning invoice and initiate the withdrawal in one request
  • Automatic Processing: Once the Lightning invoice is paid, the withdrawal is automatically processed
  • Real-time Exchange Rates: Get the current exchange rate and fees upfront
  • Simple Integration: No need to manage separate deposit and withdrawal flows