nodejs-cryptomus/src/utils/signature.ts

A comprehensive Node.js client for the Cryptomus API

import * as crypto from 'crypto';
// Add explicit type import for Node.js Buffer
import { Buffer } from 'buffer';

/**
 * Generate signature for API requests
 * 
 * @param payload - Request payload
 * @param apiKey - API key
 * @returns Generated signature
 */
export function generateSignature(payload: Record<string, any>, apiKey: string): string {
  const payloadString = JSON.stringify(payload);
  const sign = crypto.createHash('md5')
    .update(Buffer.from(payloadString).toString('base64') + apiKey)
    .digest('hex');
  
  return sign;
}

/**
 * Verify webhook signature
 * 
 * @param payload - Webhook payload
 * @param signature - Signature from webhook headers
 * @param apiKey - API key
 * @returns Whether the signature is valid
 */
export function verifyWebhookSignature(payload: string, signature: string, apiKey: string): boolean {
  const calculatedSignature = crypto.createHash('md5')
    .update(Buffer.from(payload).toString('base64') + apiKey)
    .digest('hex');
  
  return calculatedSignature === signature;
}