import WebSocket from "ws";
export type RealtimeAuth = {
    type: "api";
    apiKey: string;
} | {
    type: "oauth";
    accessToken: string;
    accountId?: string;
};
export type RealtimePlan = {
    session: Record<string, unknown>;
    items: Record<string, unknown>[];
    response: Record<string, unknown>;
};
export declare function isRealtimeModelID(modelID: unknown): modelID is string;
export declare function realtimeWebSocketURL(modelID: string, base?: string): string;
export declare function realtimeWebSocketHeaders(auth: RealtimeAuth): Record<string, string>;
export declare function realtimePlanFromResponsesBody(body: Record<string, unknown>): RealtimePlan;
/**
 * Translate one realtime server event into zero or one Responses-API SSE payloads.
 * Session bookkeeping frames (session.*, conversation.*, rate_limits.*) are dropped;
 * response.* frames pass through nearly verbatim because the realtime event family
 * matches the Responses streaming event family, with response.done reshaped into
 * response.completed/failed/incomplete carrying Responses-shaped usage.
 */
export declare function translateRealtimeEvent(modelID: string, event: Record<string, unknown>): Record<string, unknown> | undefined;
type RealtimeBridgeOptions = {
    url: string;
    headers: Record<string, string>;
    body: Record<string, unknown>;
    signal?: AbortSignal;
    handshakeTimeoutMs?: number;
    idleTimeoutMs?: number;
};
type WebSocketConstructorLike = new (url: string, options: {
    headers: Record<string, string>;
}) => WebSocket;
export declare function supportsRealtimeUnexpectedResponseEvent(constructorName: string, bunVersion?: string | undefined): boolean;
export declare function setRealtimeWebSocketConstructorForTesting(ctor?: WebSocketConstructorLike): void;
/**
 * Bridge one Responses-API request body onto a realtime WebSocket session.
 * Streams Responses-shaped SSE back to the caller; when the caller asked for a
 * non-streaming response (body.stream === false) the final response object is
 * aggregated and returned as JSON instead.
 */
export declare function bridgeRealtimeWebSocket(options: RealtimeBridgeOptions): Promise<Response>;
export {};
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