curl --request GET \
  --url https://api.fint.app/api/v1/invoice/{invoiceId} \
  --header 'x-api-key: <api-key>'

{
  "id": 123,
  "totalAmount": "<string>",
  "totalPaid": "<string>",
  "totalPending": "<string>",
  "totalMora": "<string>",
  "interestPaid": "<string>",
  "interestSnapshot": "<string>",
  "interestSnapshotDate": "<string>",
  "description": "<string>",
  "date": "<string>",
  "expirationDate": "<string>",
  "settlement": {
    "id": 123,
    "name": "<string>",
    "sentDate": "<string>"
  },
  "lastPaymentDate": "<string>",
  "uniqueId": "<string>",
  "applyInterest": true,
  "externalReference": "<string>",
  "contact": {
    "id": 123,
    "name": "<string>",
    "lastName": "<string>",
    "documentNumber": "<string>"
  },
  "items": [
    {
      "id": 123,
      "name": "<string>",
      "amount": "<string>",
      "description": "<string>",
      "startDate": "<string>",
      "isIndefinite": true,
      "conditionItems": [
        {
          "id": 123,
          "name": "<string>",
          "amount": "<string>",
          "description": "<string>",
          "startDate": "<string>",
          "collectionCycles": 1
        }
      ],
      "originalAmount": "<string>",
      "imageUrl": "<string>",
      "quantity": 123,
      "teachableCourseId": 123,
      "teachableCourseExpiresAt": "<string>",
      "collectionCycles": 1,
      "generateInterestForLatePayment": false,
      "moraDetails": [
        {
          "fromDay": 123,
          "untilDay": 123,
          "percentage": "<string>",
          "daysToApply": 123,
          "interestCalculated": "<string>",
          "itemId": 123,
          "configId": 123,
          "baseAmount": "<string>"
        }
      ],
      "details": {
        "source": "item",
        "discountItemId": 123,
        "amountType": "<string>",
        "configuredAmount": 123,
        "condition": "<string>",
        "conditionItems": [
          {
            "id": 123
          }
        ],
        "baseAmount": 123,
        "appliedAmount": 123,
        "maxDiscountAmount": 123,
        "cartItems": [
          {
            "itemId": 123,
            "totalAmount": 123
          }
        ],
        "breakdown": [
          {
            "itemId": 123,
            "discountAmount": 123
          }
        ]
      }
    }
  ],
  "subscriptionId": 123,
  "serviceCost": {
    "amount": "<string>",
    "percentage": "<string>",
    "description": "<string>"
  },
  "paymentMethod": "<string>",
  "isManualPayment": true,
  "payments": [
    {
      "id": 123,
      "date": "<string>",
      "totalAmount": "<string>",
      "isManual": true,
      "reference": "<string>"
    }
  ],
  "payerContacts": [
    {
      "id": 123,
      "type": "<string>",
      "notify": true,
      "name": "<string>",
      "lastName": "<string>",
      "hash": "<string>",
      "documentNumber": "<string>",
      "address": "<string>",
      "city": "<string>",
      "province": "<string>",
      "phoneNumber": "<string>",
      "whatsappNumber": "<string>",
      "email": "<string>"
    }
  ],
  "files": [
    {
      "id": 123,
      "url": "<string>",
      "createdAt": "<string>",
      "user": {
        "id": 123,
        "name": "<string>",
        "lastName": "<string>"
      }
    }
  ],
  "activities": [
    {
      "id": 123,
      "activity": "<string>",
      "createdAt": "<string>",
      "history": [
        {
          "id": 123,
          "status": "<string>",
          "createdAt": "<string>"
        }
      ],
      "reminder": {
        "id": 123,
        "days": 123
      },
      "lastStatus": "<string>"
    }
  ],
  "notes": [
    {
      "id": 123,
      "createdAt": "<string>",
      "note": "<string>",
      "user": {
        "id": 123,
        "name": "<string>",
        "lastName": "<string>"
      }
    }
  ]
}