import type { BinaryReader } from './binary_reader';
import type { BinaryWriter } from './binary_writer';
import type { BlockInfo } from './block_info';
export interface ColumnData {
    name: string;
    type: string;
    data: unknown[];
}
export interface Block {
    info: BlockInfo;
    columns: ColumnData[];
    rows: number;
}
export declare function emptyBlock(): Block;
export declare function writeDataPacketHeader(writer: BinaryWriter): void;
export declare function writeEmptyBlock(writer: BinaryWriter): void;
export declare function writeBlockHeader(writer: BinaryWriter, block: Block): void;
export interface BlockHeader {
    info: BlockInfo;
    numColumns: number;
    numRows: number;
}
export declare function readBlockHeader(reader: BinaryReader): BlockHeader;