/**
 * Shared utilities for Native format codec.
 */
export type TypedArray = Int8Array | Uint8Array | Int16Array | Uint16Array | Int32Array | Uint32Array | BigInt64Array | BigUint64Array | Float32Array | Float64Array;
export interface ColumnDef {
    name: string;
    type: string;
}
export interface DecodeResult {
    columns: ColumnDef[];
    rows: unknown[][];
}
export interface DecodeOptions {
    /** Decode Map types as Array<[K, V]> instead of Map<K, V> to preserve duplicate keys */
    mapAsArray?: boolean;
    /** Client version or protocol revision (e.g. 54454) */
    clientVersion?: number;
    /** Decode Enum types as numeric values instead of string names (default: false = strings) */
    enumAsNumber?: boolean;
}
export interface EnumMapping {
    nameToValue: Map<string, number>;
    valueToName: Map<number, string>;
}
export declare function parseEnumDefinition(type: string): EnumMapping | null;
export declare const TEXT_ENCODER: import("util").TextEncoder;
export declare const TEXT_DECODER: import("util").TextDecoder;
export declare const HEX_LUT: Uint8Array<ArrayBuffer>;
export declare const BYTE_TO_HEX: string[];
export declare class ClickHouseDateTime64 {
    ticks: bigint;
    precision: number;
    private pow;
    constructor(ticks: bigint, precision: number);
    /**
     * Convert to native Date object.
     * Throws if value overflows JS Date range or precision is lost (sub-millisecond components).
     */
    toDate(): Date;
    /**
     * Convert to native Date object, truncating sub-millisecond precision and clamping to JS Date range.
     */
    toClosestDate(): Date;
    toJSON(): string;
    toString(): string;
}
export declare function writeBigInt128(v: DataView, o: number, val: bigint, signed: boolean): void;
export declare function readBigInt128(v: DataView, o: number, signed: boolean): bigint;
export declare function writeBigInt256(v: DataView, o: number, val: bigint, signed: boolean): void;
export declare function readBigInt256(v: DataView, o: number, signed: boolean): bigint;
export declare function parseTypeList(inner: string): string[];
export declare function parseTupleElements(inner: string): {
    name: string | null;
    type: string;
}[];
export declare function decimalByteSize(type: string): 4 | 8 | 16 | 32;
export declare function extractDecimalScale(type: string): number;
export declare function parseDecimalToScaledBigInt(str: string, scale: number): bigint;
export declare function formatScaledBigInt(val: bigint, scale: number): string;
export declare function ipv6ToBytes(ip: string): Uint8Array;
export declare function bytesToIpv6(bytes: Uint8Array): string;
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