/**
 * Video Generation capability — generate short MP4 videos via the BlockRun
 * /v1/videos/generations endpoint. Uses x402 payment (Base or Solana).
 *
 * Default model `xai/grok-imagine-video` returns an 8-second clip for ~$0.42
 * (480p at $0.05/s; the gateway added an official 720p tier at $0.07/s on
 * 2026-08-12). Seedance (bytedance/seedance-2.0-mini through -2.5) runs
 * longer — up to a few minutes for a 10s clip.
 *
 * Flow (async since blockrun@654cd35):
 *   1. POST /v1/videos/generations with signed x-payment header. The server
 *      verifies payment (does NOT settle), submits the upstream job, and
 *      returns 202 { id, poll_url, status: "queued" }.
 *   2. GET the poll_url with the SAME x-payment header every ~5s until
 *      status=completed. On the first completed poll the server backs up
 *      the MP4 to GCS, settles payment, and returns the video URL.
 *   3. Download the MP4 and write it locally.
 *
 * If the upstream job fails, the server returns status=failed and no USDC
 * is ever transferred. If the client never polls, no charge either.
 */
import type { CapabilityHandler } from '../agent/types.js';
import type { ContentLibrary } from '../content/library.js';
import { type GatewayModel } from '../gateway-models.js';
export interface VideoGenDeps {
    library?: ContentLibrary;
    onContentChange?: () => void | Promise<void>;
}
/**
 * Resolve the per-clip USD cost used for the spend confirm, budget check, usage
 * stats, AND the content-budget asset record — one value so they can never
 * disagree. The flat $0.05/s estimate is the fallback for an unknown model, but
 * a catalog-priced per-second model (e.g. Seedance at $0.15/s) costs far more,
 * so take the HIGHER of the catalog price and the (margin-adjusted) flat
 * estimate. Without this the budget check + asset record undercount the cap ~3x
 * for Seedance. Mirrors ImageGen's resolveImageUnitCost. Exported for tests.
 */
export declare function resolveVideoUnitCost(catalogModel: GatewayModel | null, durationSeconds: number): number;
export declare function createVideoGenCapability(deps?: VideoGenDeps): CapabilityHandler;
export declare const videoGenCapability: CapabilityHandler;