/**
 * CRC32 — pure TypeScript, no native deps.
 * Standard IEEE 802.3 polynomial (0xEDB88320, reflected form).
 */
/** Compute CRC32 of a Buffer. Returns an unsigned 32-bit integer. */
export declare function crc32(buf: Buffer): number;
/**
 * Incremental CRC32 for streaming use.
 * Call update() for each chunk; call digest() to get the final value.
 */
export declare class Crc32Stream {
    private crc;
    update(buf: Buffer): void;
    digest(): number;
}
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