/**
 * Non-fatal or fatal error notification. The wire payload always carries
 * `event`, `code`, `is_fatal`, and `message`, plus an optional
 * `status_code` on fatal rejections.
 *
 * **WebSocket close codes:**
 * - `1003`: Rate limit exceeded, quota exhausted, or invalid subscription key.
 * - `1008`: Inactivity timeout.
 * - `1011`: Internal server error.
 * - `4000`: Application rejection (beta denied, invalid model, unsupported `language_code` / query param, gRPC backend unavailable). The close reason string is capped at 123 bytes.
 *
 * **Known error codes:**
 * - `invalid_config` (non-fatal): A `config.update` value was rejected (e.g. changing `stream_type` to/from `simulated`). The session continues with the previous config.
 */
export interface RealtimeError {
    event: "error";
    /** Machine-readable error code */
    code: string;
    /** Whether the error is fatal (the connection will be closed) */
    is_fatal: boolean;
    /** Human-readable error message */
    message: string;
    /**
     * HTTP-equivalent status code, present on fatal rejections
     * (e.g. `401`, `403`, `503`, `400`, `408`, `413`, `500`). Useful
     * because the WebSocket close reason string is capped at 123 bytes.
     */
    status_code?: number | undefined;
}