Crear link de pago

curl --location '/api/v1/transactions/checkout/links/create' \
--header 'Content-Type: application/json' \
--data '{
  "data": {
    "isDefault": false,
    "isUniquePayment": true,
    "name": "Pago curso online",
    "label": "Curso",
    "image": "cursos/imagen1.png",
    "description": "Pago único por el curso de programación",
    "price": 150000,
    "expiresAt": "2026-12-31T23:59:59.000Z",
    "redirectUrl": "https://merchant.com/gracias",
    "confirmUrl": "https://merchant.com/confirmacion",
    "additionalData": [
      { "label": "Talla", "required": true },
      { "label": "Color", "required": false }
    ]
  }
}'