3. Binance Pay API

This section provides comprehensive API documentation for integrating LeadsCalendar with Binance Pay API.

Integration Purpose: Enable users to pay the 1 USD equivalent in cryptocurrency using Binance Pay within LeadsCalendar.

Authentication:

  • Acquire Binance API credentials (API Key and Secret) from your Binance Developer Platform account.

API Calls:

  • Create Order (POST): Creates a payment order for the user using the /orders endpoint. Details are provided in the request body.

Parameters:

  • transactionType (string) - Required: Set to PAY for a payment transaction.
  • fiat (string) - Required: Set to USD for the desired settlement currency.
  • price (number) - Required: Specify the amount in USD (e.g., 1.00).
  • callbackUrl (string) - Required: Define a URL in your LeadsCalendar application to receive Binance Pay confirmation.

Error Handling:

Binance Pay API uses standard HTTP status codes along with JSON error responses that provide details about the encountered problem. Here's a reference table listing potential error codes, their meanings, and recommendations for handling them:

CodeMeaningRecommendation
400 (Bad Request)The request is invalid due to missing or malformed parameters.1. Parse the error message body for details. It will likely contain an error_code and a specific error message describing the problem.
2. Inspect your request parameters and identify the one causing the error based on the error code and message.
3. Correct the parameter value according to the Binance Pay API documentation.
4. Retry the API call with the corrected parameter.
401 (Unauthorized)Invalid or expired API credentials.1. Verify that your API Key and Secret used in the request are correct.
2. Check if the credentials have expired. If so, refresh them using the Binance API renewal process.
3. Retry the API call with the valid credentials.
403 (Forbidden)Insufficient permissions for the requested operation.1. Ensure your Binance API account has the necessary permissions to create payment orders (e.g., "ORDER_CREATE").
2. If unsure about permissions, contact Binance support for clarification.
429 (Too Many Requests)Rate limit exceeded for API calls.1. Implement an exponential backoff strategy. This involves retrying the request after a waiting period that doubles with each attempt.
2. This approach helps avoid overwhelming the Binance Pay API with requests.
404 (Not Found)(Less likely for order creation) Resource not found (e.g., specific order ID).1. Double-check any IDs used in the request (if applicable).
2. Verify you're using the correct API endpoint.
500 (Internal Server Error)An issue on Binance Pay's side.1. Retry the API call after a reasonable delay (e.g., a few minutes) as the server issue might be temporary.
2. If the error persists, consider contacting Binance support for assistance.

Code Snippet (Python):

Here's an example code snippet (using the requests library) demonstrating error handling based on status code and parsing the error response for Binance Pay API:

import requests

def create_binance_pay_order(api_key, secret, price, callback_url):
  headers = {"X-MBX-APIKEY": api_key}
  data = {
      "transactionType": "PAY",
      "fiat": "USD",
      "price": price,
      "callbackUrl": callback_url
  }

  url = "https://api.binance.com/orders"

  try:
    response = requests.post(url, headers=headers, json=data)
    response.raise_for_status()  # Raise exception for non-200 status codes
    return response.json()
  except requests.exceptions.HTTPError as error:
    # Check the status code
    if error.response.status_code in (400, 401, 403):
      # Parse the error JSON for details
      error_data = error.response.json()
      error_code = error_data.get('code')
      error_msg = error_data.get('msg')
      print(f"Error creating order: {error_code} - {error_msg}")
      # Handle the error based on the specific code (e.g., refresh credentials, inform user)
    elif error.response.status_code == 429:
      print(f"Rate limit exceeded. Retrying after {delay} seconds...")
      # Implement exponential backoff logic here
      # Retry the request after a calculated delay
    else:
      raise  # Re-raise unexpected errors

# Example usage with error handling
try:
  order_response = create_binance_pay_order(your_api_key, your_secret, 1.00, "https://your-callback-url")
  # Process successful response
except Exception as e:
  print(f"An error occurred: {e}")
  # Handle any errors during order creation

Remember:

  • Replace your_api_key, your_secret, 1.00, and "https://your-callback-url" with your actual values.