IBAN Checksum Validation and Breakdown

{
  "type": "object",
  "required": [
    "iban"
  ],
  "properties": {
    "iban": {
      "type": "string",
      "minLength": 1,
      "description": "The IBAN to check, written without spaces."
    }
  },
  "additionalProperties": false
}

{
  "type": "object",
  "properties": {
    "bban": {
      "type": "string",
      "description": "The basic bank account number: the part of the IBAN after the check digits."
    },
    "valid": {
      "type": "boolean",
      "description": "Whether the IBAN passed the format, length and checksum check."
    },
    "bank_code": {
      "type": "string",
      "description": "The bank identifier read from the BBAN."
    },
    "check_digits": {
      "type": "string",
      "description": "The two check digits that follow the country code."
    },
    "country_code": {
      "type": "string",
      "description": "The two-letter country code at the start of the IBAN."
    },
    "expected_length": {
      "type": "number",
      "description": "The number of characters an IBAN from that country must have."
    }
  },
  "description": "The IBAN check result, as returned after shaping."
}