import type net from 'node:net';
type Stats = {
    bytesWritten: number | null;
    bytesRead: number | null;
};
/**
 * Socket object extended with previous read and written bytes.
 * Necessary due to target socket re-use.
 */
export type SocketWithPreviousStats = net.Socket & {
    previousBytesWritten?: number;
    previousBytesRead?: number;
};
export declare const countTargetBytes: (sourceSocket: net.Socket, target: SocketWithPreviousStats, registerCloseHandler?: (handler: () => void) => void) => void;
export declare const getTargetStats: (rawSocket: net.Socket) => Stats;
export {};
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