/**
 * Data record serialization and deserialization.
 *
 * Binary format (v2):
 * [magic:4][version:2][opType:1][flags:1][seqNum:8][timestamp:8][keyLen:2][key:N][dimension:4][embedding:D*4][checksum:4][trailer:4]
 */
import type { DataRecord, DeserializeDataResult, DataFileHeader } from './types';
/**
 * Calculate the size of a serialized data record.
 */
export declare function calculateRecordSize(keyLength: number, dimension: number): number;
/**
 * Serialize a data record to bytes.
 */
export declare function serializeDataRecord(record: DataRecord): Uint8Array;
/**
 * Deserialize a data record from bytes.
 * Returns null if the record is invalid or corrupted.
 */
export declare function deserializeDataRecord(data: Uint8Array, startOffset?: number): DeserializeDataResult | null;
/**
 * Read just the key from a data record at a given offset.
 * Useful during WAL recovery to avoid reading the entire embedding.
 */
export declare function readKeyFromBuffer(data: Uint8Array, startOffset?: number): string | null;
/**
 * Serialize the file header.
 */
export declare function serializeHeader(dimension: number): Uint8Array;
/**
 * Deserialize the file header.
 */
export declare function deserializeHeader(data: Uint8Array): DataFileHeader | null;
export declare function crc32(data: Uint8Array): number;
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