/** Default unary request budget so a hung host does not hang callers. */
export declare const DEFAULT_GATEWAY_TIMEOUT_MS = 30000;
export type GatewayRequestOptions = {
    timeoutMs?: number;
    signal?: AbortSignal;
};
export declare function resolveGatewayTimeoutMs(perRequest: number | undefined, instance: number | undefined, applyDefault: boolean): number | undefined;
export declare function composeGatewayAbort(timeoutMs: number | undefined, signals: Array<AbortSignal | undefined>): {
    signal?: AbortSignal;
    cleanup: () => void;
};
export declare function isTimeoutAbort(signal: AbortSignal | undefined): boolean;
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