export type SecureFetchOptions = {
    label: string;
    maxBytes: number;
    timeoutMs: number;
};
/** Read a small HTTPS resource with redirect, timeout, and streamed size bounds. */
export declare function fetchHttpsBytes(url: string, options: SecureFetchOptions): Promise<Buffer>;
export declare function fetchHttpsText(url: string, options: SecureFetchOptions): Promise<string>;
/** Stream a large HTTPS artifact to a new private file while hashing it. */
export declare function downloadHttpsFile(url: string, destination: string, options: SecureFetchOptions): Promise<string>;
/** Hash a local file without buffering the complete artifact in memory. */
export declare function sha256File(path: string): Promise<string>;
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