Ethereum: Accurate Binance API Prices from Historical Data

As a Python developer, you’re probably familiar with the importance of having accurate and up-to-date historical price data for Ethereum. In this article, we’ll explore how to fetch accurate Binance API prices in Python at specific points in time.

Prerequisites

• A Binance API key

• A library that can handle asynchronous data fetching (e.g. requests, aiohttp)

• A Python environment with the required libraries installed

Method 1: Using requests and a callback function

We’ll use the requests library to make an HTTP request to the Binance API. We’ll create a callback function that will be triggered whenever a new data point is received from the API.

import requests
from datetime import datetime
def get_api_price(start_date_str, end_date_str):





Set your Binance API key and API endpoint URL here
api_key = "YOUR_API_KEY"
api_url = f"
whileTrue:
try:
response = requests.get(api_url, headers={"x-api-key": api_key})
data = response.json()

Find the price of ETH on the specified date
for item in data["result"]:
if "timestamp" in item and int(item["timestamp"]) >= start_date_str:
return float(item["price"])
except requests.exceptions.RequestException as e:
print(f"Error: {e}")

Method 2: Using aiohttp and a Loop

If you prefer a more asynchronous approach, we can use the aiohttp library to fetch data from the API.

import aiohttp
async def get_api_price(start_date_str, end_date_str):
async with aiohttp.ClientSession() as session:
api_url = f"
start_date = datetime.strptime(start_date_str, "%Y-%m-%d")
end_date = datetime.strptime(end_date_str, "%Y-%m-%d")
while start_date <= end_date:
try:
response = await session.get(api_url)
data = await response.json()

Find the price of ETH on the specified date
for item in data["result"]:
if "timestamp" in item and int(item["timestamp"]) >= start_date:
return float(item["price"])
except aiohttp.ClientResponseError as e:
print(f"Error: {e}")

Example usage:
start_date_str = "2022-01-01"
end_date_str = "2022-12-31"
get_api_price(start_date_str, end_date_str)

Tips and Variations

• Make sure to replace YOUR_API_KEY with your actual Binance API key.

• You can adjust the limit parameter in both examples to fetch more or fewer data points.

• Consider adding error handling for cases where the API request fails or returns an invalid response.

• If you need to perform additional processing on the received prices, feel free to modify the callback functions accordingly.