/**
 * A structured endpoint for SSE connections.
 * Providers construct the URL as `origin + requestUri`.
 */
export interface EventStreamEndpoint {
    /**
     * The origin of the SSE endpoint (e.g. "https://example.com").
     * Optional per ADR-0008; when absent, providers should fall back to the configured OFREP baseUrl origin.
     */
    origin?: string;
    requestUri: string;
}
/**
 * A real-time change notification connection endpoint from the OFREP bulk evaluation response.
 * Per ADR-0008, providers must ignore entries with unknown `type` values.
 */
export interface EventStream {
    /**
     * The connection type. Currently only `"sse"` is defined.
     */
    type: string;
    /**
     * The endpoint URL. May include auth tokens or channel identifiers.
     */
    url?: string;
    /**
     * Structured endpoint components for proxy deployments.
     */
    endpoint?: EventStreamEndpoint;
    /**
     * Seconds of client inactivity after which the connection should be closed.
     * Default: 120 seconds.
     */
    inactivityDelaySec?: number;
}
/**
 * The payload of an SSE event delivered over an {@link EventStream} connection.
 * Per ADR-0008, a `refetchEvaluation` event signals that the client should
 * re-fetch the bulk evaluation, optionally carrying cache-validation metadata.
 */
export interface EventStreamMessage {
    /**
     * The event type. Currently only `"refetchEvaluation"` is defined; clients
     * must ignore events with unknown `type` values for forward compatibility.
     */
    type: string;
    /** ETag of the flag configuration that triggered the event. */
    etag?: string;
    /** Last-modified timestamp of the flag configuration. */
    lastModified?: string | number;
}