/**
 * Timing behavior simulation
 */
import type { TimingBehavior } from '../types/config.js';
/**
 * Calculate a delay value from a fixed number or random range
 */
export declare function calculateDelay(delay: number | [number, number] | undefined): number;
/**
 * Calculate transmission delay based on baud rate and frame size
 * Formula: (frameBytes * 11 bits per byte) / (baudRate / 1000)
 */
export declare function calculateTransmissionDelay(frameBytes: number, baudRate: number): number;
/**
 * Thin abstraction over setTimeout for dependency injection
 */
export interface DelayFunction {
    (ms: number): Promise<void>;
}
/**
 * Default delay implementation using setTimeout
 */
export declare const defaultDelay: DelayFunction;
/**
 * Timing simulator that calculates and applies realistic device delays
 */
export declare class TimingSimulator {
    private config;
    private delayFn;
    constructor(config: TimingBehavior, delayFn?: DelayFunction);
    /**
     * Calculate total delay for a request
     * @param request - The Modbus request buffer
     * @param registerCount - Number of registers being accessed
     * @returns Total delay in milliseconds
     */
    calculateTotalDelay(request: Buffer, registerCount: number): number;
    /**
     * Apply timing delay for a request
     * @param request - The Modbus request buffer
     * @param registerCount - Number of registers being accessed
     * @returns Promise that resolves after the calculated delay
     */
    delay(request: Buffer, registerCount: number): Promise<void>;
}
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