import type { RuntimeToolsConfig } from '../config/schema.js';
import type { RuntimeAsset, RuntimePlatform } from './catalog.js';
type DownloadConfig = RuntimeToolsConfig['download'];
export interface ResolvedRuntimeDownload {
    url: string;
    sha256: string;
    source: 'website' | 'direct';
}
export declare function runtimeGatewayPythonMirror(gatewayBaseUrl: string): string;
export declare function canFallbackPythonInstall(output: string, timedOut: boolean): boolean;
export declare function validateGatewayDescriptor(params: {
    value: unknown;
    gatewayBaseUrl: string;
    asset: RuntimeAsset;
    platform: RuntimePlatform;
}): ResolvedRuntimeDownload;
export declare function resolveRuntimeDownloadSource(params: {
    asset: RuntimeAsset;
    platform: RuntimePlatform;
    config: DownloadConfig;
    signal?: AbortSignal;
    onFallback?: (message: string) => void;
}): Promise<ResolvedRuntimeDownload>;
export {};