/** Hard per-task input cap of the useapi Runway upscale endpoint (seconds). */
export declare const RUNWAY_UPSCALE_MAX_SECONDS = 40;
export interface RunwayUpscaleEnvOptions {
    env?: NodeJS.ProcessEnv;
    fetcher?: typeof fetch;
}
/**
 * Derive the NAMESPACED, pollable task id from the asset upload's `assetId`
 * and the submit response's bare `task.id`. PURE.
 *
 * `assetId` shape: `user:<uid>-runwayml:<email>-asset:<uuid>` — the same
 * `user:…-runwayml:…` prefix namespaces every task id on the account.
 * Polling the bare uuid instead 400s with "Parameter taskId has incorrect
 * format" (curl -sf then swallows the body, which is how the film run's
 * monitor watched a finished task in silence for an hour).
 */
export declare function runwayTaskIdFromAssetId(assetId: string, taskUuid: string): string;
/**
 * Upload a local video as a Runway asset (raw binary body, NOT multipart).
 * Returns the namespaced `assetId`.
 */
export declare function uploadRunwayUpscaleAsset(input: {
    filePath: string;
    name: string;
}, options?: RunwayUpscaleEnvOptions): Promise<{
    assetId: string;
}>;
/**
 * Submit the upscale task for an uploaded asset. `exploreMode: true` is the
 * free lane (Runway Unlimited); without Unlimited the endpoint bills
 * 2 credits/second — which is why the finish handler keeps this backend
 * behind `--confirm-spend`. Returns the BARE task uuid (see
 * {@link runwayTaskIdFromAssetId} for why it is not directly pollable).
 */
export declare function submitRunwayUpscale(input: {
    videoAssetId: string;
    exploreMode?: boolean;
}, options?: RunwayUpscaleEnvOptions): Promise<{
    taskUuid: string;
    status: string;
}>;
/** One poll of a NAMESPACED task id. */
export declare function pollRunwayUpscale(input: {
    namespacedTaskId: string;
}, options?: RunwayUpscaleEnvOptions): Promise<{
    status: string;
    outputUrl: string | null;
}>;
export interface AwaitRunwayUpscaleOptions extends RunwayUpscaleEnvOptions {
    sleep?: (ms: number) => Promise<void>;
    intervalMs?: number;
    timeoutMs?: number;
}
/**
 * Poll a submitted upscale to a terminal state. `THROTTLED` is the explore
 * queue's normal "waiting" state (it can hold for many minutes — the free
 * lane queues), so it continues; SUCCEEDED resolves with the artifact URL;
 * FAILED / CANCELED throw.
 */
export declare function awaitRunwayUpscale(input: {
    assetId: string;
    taskUuid: string;
}, options?: AwaitRunwayUpscaleOptions): Promise<{
    outputUrl: string;
}>;
/** Download the upscaled artifact to `dest`. */
export declare function downloadRunwayUpscale(url: string, dest: string, options?: RunwayUpscaleEnvOptions): Promise<string>;
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