{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:inquirium-model-package-provider-key-endorsement:v1",
  "title": "Inquirium Model Package Provider Key Endorsement v1",
  "description": "Federation-root-signed, expiring trust statement for one provider release public key. Verification may project the exact key into distributor trust but never authorizes a release, source, install, or activation by itself.",
  "type": "object",
  "additionalProperties": false,
  "x-dia-workflow": "project",
  "x-dia-status": "accepted",
  "x-dia-basis": [
    "doc/project/40-proposals/064-inquirium-implementation-recommendations.md",
    "doc/project/40-proposals/066-inquirium-assistant-channel.md",
    "doc/project/40-proposals/076-federation-identity-and-network-selector.md"
  ],
  "required": [
    "schema",
    "schema/v",
    "endorsement/ref",
    "federation/id",
    "federation-root/version",
    "federation-root/digest",
    "provider/ref",
    "purpose",
    "key/id",
    "public/key",
    "endorser/subject-ref",
    "issued-at",
    "expires-at",
    "signatures"
  ],
  "properties": {
    "schema": { "const": "inquirium.model-package.provider-key-endorsement.v1" },
    "schema/v": { "const": 1 },
    "endorsement/ref": {
      "type": "string",
      "pattern": "^model-provider-key-endorsement/.+$",
      "maxLength": 256
    },
    "federation/id": { "type": "string", "minLength": 1, "maxLength": 256 },
    "federation-root/version": { "type": "integer", "minimum": 1 },
    "federation-root/digest": {
      "type": "string",
      "pattern": "^sha256:[A-Za-z0-9_-]{43}$"
    },
    "provider/ref": {
      "type": "string",
      "pattern": "^provider/.+$",
      "maxLength": 256
    },
    "purpose": { "const": "model-package-distribution" },
    "key/id": {
      "type": "string",
      "pattern": "^key/.+$",
      "maxLength": 256
    },
    "public/key": {
      "type": "string",
      "pattern": "^z[1-9A-HJ-NP-Za-km-z]+$",
      "maxLength": 256
    },
    "endorser/subject-ref": {
      "type": "string",
      "pattern": "^(participant|org):did:key:z[1-9A-HJ-NP-Za-km-z]+$",
      "maxLength": 256
    },
    "issued-at": { "type": "string", "format": "date-time" },
    "expires-at": { "type": "string", "format": "date-time" },
    "revocation/ref": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256
    },
    "signatures": {
      "type": "array",
      "minItems": 1,
      "maxItems": 8,
      "items": { "$ref": "#/$defs/signature" }
    }
  },
  "$defs": {
    "signature": {
      "type": "object",
      "additionalProperties": false,
      "required": ["alg", "key_public", "value"],
      "properties": {
        "alg": { "const": "ed25519" },
        "key_public": {
          "type": "string",
          "pattern": "^z[1-9A-HJ-NP-Za-km-z]+$",
          "maxLength": 256
        },
        "value": {
          "type": "string",
          "pattern": "^[A-Za-z0-9_-]{86}$"
        }
      }
    }
  }
}