export declare function isThrowRetryable(method?: string): boolean;
export interface RerouteOptions {
    /** Issue the request against the current (possibly just-rerouted) node. */
    send: () => Promise<Response>;
    /** Re-resolve the owning node and update client URL state. Throws if it fails. */
    reroute?: () => Promise<void>;
    /**
     * Whether the request may be re-sent after a thrown fetch (opaque network/CORS
     * failure). Only true for idempotent requests — see THROW_RETRYABLE.
     */
    retryOnThrow: boolean;
}
/**
 * Fetch with shard-reroute retries. A node being drained returns a readable
 * 421/503: re-resolve the owner and retry. A node that has fully rolled away no
 * longer answers, so the LB's CORS-less 5xx makes fetch reject opaquely (no
 * status to inspect); for idempotent requests we treat that throw as the same
 * reroute signal, since otherwise the request keeps targeting a dead node and
 * surfaces only as an opaque CORS error.
 */
export declare function fetchWithReroute(opts: RerouteOptions): Promise<Response>;
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