/**
 * NexArt Code Mode Runtime SDK - Node-only Static PNG Renderer
 *
 * ╔══════════════════════════════════════════════════════════════════════════╗
 * ║  DETERMINISTIC REPLAY SUPPORT (additive, Node-only)                       ║
 * ║                                                                          ║
 * ║  Renders a Static Mode sketch to a PNG Buffer in a Node / headless       ║
 * ║  environment, reusing the canonical render core (executeSketchToCanvas). ║
 * ║                                                                          ║
 * ║  This module is imported ONLY from the Node entry point so that the      ║
 * ║  `crypto` import is never pulled into browser bundles.                   ║
 * ║                                                                          ║
 * ║  No silent fallback: if a headless canvas is unavailable the underlying  ║
 * ║  createRuntimeCanvas throws, and PNG encoding requires a Node canvas     ║
 * ║  (node-canvas `toBuffer`) — otherwise a clear protocol error is thrown.  ║
 * ╚══════════════════════════════════════════════════════════════════════════╝
 */
import type { EngineConfig, RunOptions } from './types';
/**
 * Result of a deterministic Node static render.
 */
export interface StaticPngResult {
    /** PNG-encoded image bytes (node-canvas `toBuffer('image/png')`). */
    png: Buffer;
    /** SHA-256 of the raw RGBA pixel buffer (canonical determinism hash). */
    pixelHash: string;
    width: number;
    height: number;
}
/**
 * renderStaticPng — deterministic Static Mode render to PNG (Node only).
 *
 * Delegates the actual sketch execution to the shared `executeSketchToCanvas`
 * core (the same code path the oracle release gate exercises), then encodes the
 * resulting canvas to PNG bytes via node-canvas.
 *
 * @throws if a headless canvas is unavailable (no silent fallback) or if the
 *         created canvas does not support Node PNG encoding.
 */
export declare function renderStaticPng(config: EngineConfig, options: RunOptions): Promise<StaticPngResult>;
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