art.xx-c.chat.message

{
  "$type": "com.atproto.lexicon.schema",
  "defs": {
    "main": {
      "description": "Encrypted chat message for XX C chat room",
      "key": "tid",
      "record": {
        "properties": {
          "authTag": {
            "description": "Authentication tag for GCM mode (base64 encoded)",
            "maxLength": 32,
            "type": "string"
          },
          "createdAt": {
            "description": "Timestamp when message was created",
            "format": "datetime",
            "type": "string"
          },
          "encryptedContent": {
            "description": "AES-256-GCM encrypted message content (base64 encoded)",
            "maxLength": 10000,
            "type": "string"
          },
          "encryptionVersion": {
            "description": "Encryption scheme version (currently v1: HKDF + AAD)",
            "type": "string"
          },
          "iv": {
            "description": "Initialization vector for AES-GCM (base64 encoded)",
            "maxLength": 24,
            "type": "string"
          },
          "replyTo": {
            "description": "Optional: AT-URI of message being replied to",
            "format": "at-uri",
            "type": "string"
          },
          "roomId": {
            "description": "Identifier for chat room (e.g., 'main')",
            "maxLength": 64,
            "type": "string"
          }
        },
        "required": [
          "encryptedContent",
          "roomId",
          "iv",
          "createdAt"
        ],
        "type": "object"
      },
      "type": "record"
    }
  },
  "id": "art.xx-c.chat.message",
  "lexicon": 1
}