matrix-spec-proposals/event-schemas/schema/m.room.avatar

{
    "title": "RoomAvatar",
    "description": "A picture that is associated with the room. This can be displayed alongside the room information.",
    "type": "object",
    "allOf": [{
        "$ref": "core-event-schema/state_event.yaml"
    }],
    "properties": {
        "content": {
            "type": "object",
            "properties": {
                "url": {
                    "type": "string",
                    "description": "The URL to the image."
                },
                "thumbnail_url": {
                    "type": "string",
                    "description": "The URL to the thumbnail of the image."
                },
                "thumbnail_info": {
                    "type": "object",
                    "title": "ImageInfo",
                    "description": "Metadata about the image referred to in ``thumbnail_url``.",
                    "allOf": [{
                        "$ref": "core-event-schema/msgtype_infos/image_info.yaml"
                    }]
                },
                "info": {
                    "type": "object",
                    "title": "ImageInfo",
                    "description": "Metadata about the image referred to in ``url``.",
                    "allOf": [{
                        "$ref": "core-event-schema/msgtype_infos/image_info.yaml"
                    }]
                }
            },
            "required": ["url"]
        },
        "state_key": {
            "type": "string",
            "description": "A zero-length string.",
            "pattern": "^$"
        },
        "type": {
            "type": "string",
            "enum": ["m.room.avatar"]
        }
    }
}