//#region src/proxy.d.ts
declare const PROXY_SECRET_HEADER = "pinboard-proxy-secret";
declare const isReservedPinboardHeader: (name: string) => boolean;
declare const proxySecretHeaders: (secret: string) => Record<string, string>;
/** In-band placement NACK: a pinned worker marks responses that refused to
 * start a new activation; stripped before anything reaches the client. */
declare const REFUSAL_HEADER = "pinned-refusal";
declare const LEASE_UNHEALTHY_REFUSAL = "lease-unhealthy";
declare const FROM_HEADER = "pinboard-from";
/** Placement epoch of the row a forward resolved against. */
declare const EPOCH_HEADER = "pinboard-epoch";
declare const SESSION_HEADER = "pinboard-session";
declare const SESSION_SECRET_HEADER = "pinboard-session-secret";
declare const DEPTH_HEADER = "pinboard-subrequest-depth";
declare const isConnectError: (err: unknown) => boolean;
declare const isTimeoutError: (err: unknown) => boolean;
type ForwardOutcome = "forwarded" | "aborted" | "unreachable" | "failed";
declare namespace Transport {
  type FetchLike = (request: Request) => Promise<Response>;
  type UpgradeHooks = {
    onFailure(outcome: Exclude<ForwardOutcome, "forwarded">): void;
    onClose(): void;
  };
  /** Performs the upgrade forward; the returned Response completes the
   * client's upgrade (on Workers, a 101 carrying `webSocket`). */
  type Upgrade = (req: Request, outbound: {
    url: string;
    headers: Headers;
  }, hooks: UpgradeHooks) => Promise<Response>;
  type Options = {
    fetch?: FetchLike | undefined;
    upgrade?: Upgrade | undefined;
  };
}
/** Outbound headers: hop-by-hop and reserved Pinboard-* stripped, the stamp
 * applied, X-Forwarded-For reduced to the observed peer address. */
declare const outboundHeaders: (req: Request, address: string | undefined, stamp: Record<string, string>) => Headers;
declare const forward: (fetchImpl: Transport.FetchLike, req: Request, target: string, headers: Headers, onOutcome: (outcome: ForwardOutcome) => void,
/** Cap on the wait for upstream response headers; streaming bodies are
 * never cut. Exceeding answers 504. */
timeoutMs?: number) => Promise<Response>;
/** Workers-style upgrade: the platform fetch returns the 101 Response
 * (carrying the socket) directly. */
declare const fetchUpgrade: (fetchImpl: Transport.FetchLike) => Transport.Upgrade;
//#endregion
export { DEPTH_HEADER, EPOCH_HEADER, FROM_HEADER, ForwardOutcome, LEASE_UNHEALTHY_REFUSAL, PROXY_SECRET_HEADER, REFUSAL_HEADER, SESSION_HEADER, SESSION_SECRET_HEADER, Transport, fetchUpgrade, forward, isConnectError, isReservedPinboardHeader, isTimeoutError, outboundHeaders, proxySecretHeaders };
//# sourceMappingURL=proxy.d.ts.map