/**
 * utils/crc32.ts — checkpoint integrity (CRC-32) + a backward-compatible trailer.
 *
 * Checkpoints had no integrity check: a truncated or bit-rotted `.bin` would
 * either throw deep in the parser or, worse, load corrupt weights silently. This
 * adds a standard IEEE CRC-32 and a self-describing trailer that callers append
 * on export and verify on load.
 *
 * The trailer is appended AFTER the existing payload as `[magic u32][crc u32]`
 * (8 bytes, little-endian). Because every checkpoint reader consumes a
 * length-bounded payload (header declares element counts) and ignores trailing
 * bytes, an old reader still loads a trailer-bearing file — the trailer is
 * purely additive. The CRC covers the payload bytes only (everything before the
 * trailer).
 */
/** Trailer sentinel: 'EVCR' (Evermind CRc), little-endian uint32. */
export declare const CRC_TRAILER_MAGIC = 1380144709;
/** IEEE CRC-32 of a byte buffer, returned as an unsigned 32-bit number. */
export declare function crc32(bytes: Uint8Array): number;
/** Return a new ArrayBuffer = `payload` followed by the CRC trailer. */
export declare function appendCrcTrailer(payload: ArrayBuffer): ArrayBuffer;
export interface CrcCheck {
    /** True when a recognised CRC trailer is present. */
    hasTrailer: boolean;
    /** True when no trailer is present, or the trailer's CRC matches the payload. */
    ok: boolean;
    /** The payload with any trailer stripped (safe to parse). */
    body: ArrayBuffer;
}
/**
 * Inspect a buffer for a CRC trailer. When present, verifies the CRC over the
 * preceding payload. When absent (legacy file), reports `ok: true` and returns
 * the buffer unchanged — so verification is opt-in by the writer, never a
 * hard requirement that would reject pre-CRC checkpoints.
 */
export declare function verifyCrcTrailer(buffer: ArrayBuffer): CrcCheck;
//# sourceMappingURL=crc32.d.ts.map