{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:room-relay-sender-key-distribution:v1",
  "title": "RoomRelaySenderKeyDistribution v1",
  "description": "Pairwise sealed and sender-authenticated distribution of one Room relay sender key. This artifact is recipient-private and MUST NOT be routed through or retained by the federation relay.",
  "type": "object",
  "additionalProperties": false,
  "x-dia-workflow": "project",
  "x-dia-status": "draft",
  "x-dia-basis": ["P070"],
  "required": [
    "schema/v", "room/id", "relay/epoch", "membership/epoch", "sender/subject",
    "recipient/subject", "sender/ephemeral-pub", "nonce", "ciphertext",
    "ciphertext/digest", "signer/ref", "signature"
  ],
  "properties": {
    "schema/v": { "const": 1 },
    "room/id": { "$ref": "room.v1.schema.json#/$defs/room_id" },
    "relay/epoch": { "type": "integer", "minimum": 1 },
    "membership/epoch": { "type": "integer", "minimum": 1 },
    "sender/subject": { "$ref": "room.v1.schema.json#/$defs/subject" },
    "recipient/subject": { "$ref": "room.v1.schema.json#/$defs/subject" },
    "sender/ephemeral-pub": {
      "type": "string",
      "minLength": 43,
      "maxLength": 43,
      "pattern": "^[A-Za-z0-9_-]+$"
    },
    "nonce": {
      "type": "string",
      "minLength": 32,
      "maxLength": 32,
      "pattern": "^[A-Za-z0-9_-]+$"
    },
    "ciphertext": {
      "type": "string",
      "minLength": 64,
      "maxLength": 64,
      "pattern": "^[A-Za-z0-9_-]+$"
    },
    "ciphertext/digest": {
      "type": "string",
      "minLength": 16,
      "maxLength": 128,
      "pattern": "^sha256:[A-Za-z0-9_-]+$"
    },
    "signer/ref": {
      "type": "string",
      "minLength": 1,
      "maxLength": 512
    },
    "signature": {
      "type": "object",
      "additionalProperties": false,
      "required": ["alg", "value"],
      "properties": {
        "alg": { "const": "ed25519" },
        "value": {
          "type": "string",
          "minLength": 86,
          "maxLength": 86,
          "pattern": "^[A-Za-z0-9_-]+$"
        }
      }
    }
  }
}