import type { Transport } from '@ya-modbus/driver-types';
import { Mutex } from 'async-mutex';
/**
 * Wraps a transport with mutex-based serialization.
 * All operations are executed sequentially to prevent concurrent access issues.
 *
 * Used for:
 * - RTU transports: Prevents bus collisions when multiple devices share a serial bus
 * - TCP transports: Many Modbus devices support only one connection or process
 *   requests sequentially. Serialization prevents timeouts and communication errors.
 */
export declare class MutexTransport implements Transport {
    private readonly transport;
    private readonly mutex;
    constructor(transport: Transport, mutex: Mutex);
    readHoldingRegisters(address: number, count: number): Promise<Buffer>;
    readInputRegisters(address: number, count: number): Promise<Buffer>;
    readCoils(address: number, count: number): Promise<Buffer>;
    readDiscreteInputs(address: number, count: number): Promise<Buffer>;
    writeSingleRegister(address: number, value: number): Promise<void>;
    writeSingleCoil(address: number, value: boolean): Promise<void>;
    writeMultipleRegisters(address: number, values: Buffer): Promise<void>;
    writeMultipleCoils(address: number, values: Buffer): Promise<void>;
    close(): Promise<void>;
}
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