{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:contact-request:v1",
  "title": "ContactRequest v1",
  "description": "Private artifact sent to a route candidate returned by Contact Catalog to request a narrow messaging/contact relationship. It carries a sender subject and optional sender-handle proof; it is not the private message body.",
  "type": "object",
  "additionalProperties": true,
  "x-dia-workflow": "project",
  "x-dia-status": "draft",
  "x-dia-basis": [
    "doc/project/30-stories/story-010-message-to-a-friend.md",
    "doc/project/40-proposals/058-contact-catalog.md",
    "doc/project/40-proposals/057-user-and-operator-notifications.md"
  ],
  "required": [
    "schema",
    "schema/v",
    "request/id",
    "request/kind",
    "sender/subject",
    "requested/capability-id",
    "requested/purposes",
    "issued/at",
    "expires/at",
    "proof/signature"
  ],
  "properties": {
    "schema": {
      "const": "contact-request.v1"
    },
    "schema/v": {
      "const": 1
    },
    "request/id": {
      "type": "string",
      "pattern": "^contact-request:[a-z0-9][a-z0-9:-]*$"
    },
    "request/kind": {
      "type": "string",
      "enum": ["messaging-contact"]
    },
    "sender/display-name": {
      "type": "string",
      "minLength": 1,
      "maxLength": 140
    },
    "sender/subject": {
      "$ref": "#/$defs/subject"
    },
    "sender/handle-proof-ref": {
      "type": "string",
      "minLength": 1,
      "description": "Optional `email-control` or `phone-control` passport reference proving that the sender controls the displayed contact handle."
    },
    "sender/reply-route": {
      "$ref": "#/$defs/subject"
    },
    "recipient/route": {
      "$ref": "#/$defs/subject",
      "description": "Optional explicit recipient route. Contact Catalog lookup deliveries MAY omit it; the receiving node then binds the request to the local node-id selected by the delivery route."
    },
    "recipient/public-handle-ref": {
      "type": "string",
      "minLength": 1,
      "description": "Opaque reference to the external handle used for lookup. Raw email or phone MAY be stored locally, but network artifacts SHOULD prefer a redacted or digest-bound reference."
    },
    "requested/capability-id": {
      "type": "string",
      "enum": ["messaging-receive"],
      "description": "Capability passport profile requested from the recipient if the user accepts."
    },
    "requested/purposes": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "type": "string",
        "enum": ["messaging"]
      }
    },
    "greeting": {
      "type": "string",
      "maxLength": 255
    },
    "issued/at": {
      "type": "string",
      "format": "date-time"
    },
    "expires/at": {
      "type": "string",
      "format": "date-time"
    },
    "correlation/id": {
      "type": "string",
      "minLength": 1
    },
    "proof/signature": {
      "$ref": "#/$defs/signature"
    },
    "policy_annotations": {
      "type": "object",
      "additionalProperties": true
    }
  },
  "$defs": {
    "subject": {
      "type": "object",
      "additionalProperties": false,
      "minProperties": 1,
      "properties": {
        "participant/id": {
          "type": "string",
          "pattern": "^participant:did:key:z[1-9A-HJ-NP-Za-km-z]+$"
        },
        "routing-subject/id": {
          "type": "string",
          "pattern": "^routing:did:key:z[1-9A-HJ-NP-Za-km-z]+$"
        },
        "contact-nym/id": {
          "type": "string",
          "pattern": "^contact-nym:[a-z0-9][a-z0-9:-]*$"
        },
        "node/id": {
          "type": "string",
          "pattern": "^node:did:key:z[1-9A-HJ-NP-Za-km-z]+$"
        }
      }
    },
    "signature": {
      "type": "object",
      "additionalProperties": true,
      "required": ["alg", "value"],
      "properties": {
        "alg": {
          "const": "ed25519"
        },
        "signer": {
          "type": "string",
          "pattern": "^(participant|routing|contact-nym):"
        },
        "value": {
          "type": "string",
          "minLength": 1
        }
      }
    }
  }
}