{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/FIDEScommunity/FIDES-credential-schemas/refs/heads/main/vct-schemas/einvoice/1/FIDES.invoice.schema.json",
  "title": "FIDES eInvoice Attestation (SD-JWT VC, flat schema)",
  "description": "This schema represents the claim set of an SD-JWT based Verifiable Credential for the eInvoice attestation as a single, flat JSON object. It is based on UBL attributes and aligned with the IETF SD-JWT VC data model: generic SD-JWT VC claims (iss, sub, vct, iat, nbf, exp, jti, cnf) are defined alongside the domain-specific LPID claims. Implementations may conceptually treat this as a layered model (base + domain), but the structure is flat for systems that expect a single JSON Schema document, such as current organizational wallet templates.",
  "type": "object",
  "properties": {
    "vct": {
      "type": "string",
      "const": "urn:org:fides:einvoice:1"
    },
    "invoice_id": {
      "description": "The id of the invoice",
      "type": "string"
    },
    "invoice_date": {
      "description": "The invoice date",
      "type": "string",
      "format": "date"
    },
    "due_date": {
      "description": "Due date of the invoice",
      "type": "string",
      "format": "date"
    },
    "currency_code": {
      "description": "Currency code of the invoice, as defined in ISO 4217:2015",
      "type": "string",
      "minLength": 3,
      "maxLength": 3
    },
    "tax_exclusive_amount": {
      "description": "Amount of the invoice excluding taxes",
      "type": "number"
    },
    "tax_amount": {
      "description": "Tax amount of the invoice",
      "type": "number"
    },
    "tax_inclusive_amount": {
      "description": "Amount of the invoice including taxes",
      "type": "number"
    },
    "evidence": {
      "description": "The original evidence documents, such as the UBL 2.0 invoice",
      "type": "array",
         "items": {
           "type": "object",
           "properties": {
             "id": {
               "description": "The uri to the original document",
               "type": "string",
               "format": "uri"
             },
             "type": {
               "description": "The type of document",
               "type": "array",
               "items": { "type": "string" }
             },
             "name": {
               "description": "The name of the document",
               "type": "string"
             },
             "description": {
               "description": "Description of the document",
               "type": "string"
             },
             "digestMultibase": {
               "description": "Digest of the document",
               "type": "string"
             }
           },
           "required": ["id", "type", "name", "digestMultibase"]
         }
     }
  },
  "required": [
    "invoice_id",
    "invoice_date",
    "due_date",
    "currency_code",
    "tax_exclusive_amount",
    "tax_amount",
    "tax_inclusive_amount",
    "evidence"
  ]
}