如何在V2中使用API KEY身份验证正确地签署对Coinbase的请求

import requests
import hmac
import hashlib
import time
import json

# 配置
api_key = 'YOUR_API_KEY'
api_secret = 'YOUR_API_SECRET'
passphrase = 'YOUR_PASSPHRASE'

# 请求参数
method = 'GET'
url = 'https://api.coinbase.com/v2/accounts'
timestamp = str(int(time.time()))
message = timestamp + method + url

# 生成签名
signature = hmac.new(api_secret.encode(), message.encode(), hashlib.sha256).hexdigest()

# 请求头
headers = {
    'CB-ACCESS-KEY': api_key,
    'CB-ACCESS-SIGN': signature,
    'CB-ACCESS-TIMESTAMP': timestamp,
    'CB-ACCESS-PASSPHRASE': passphrase,
    'Content-Type': 'application/json'
}

# 发送请求
response = requests.get(url, headers=headers)

# 处理响应
if response.status_code == 200:
    print(json.loads(response.text))
else:
    print(f'Error: {response.status_code}')