Python 新手就能搞定 Bitfinex API

做 Bitfinex 放貸已經 2、3年了，曾經想過用 Bitfinex API 來記錄每天融資錢包的餘額，配合 Line Notify，每天傳餘額數字給自己，但苦於程式底子不足，就放棄了

2 年後的今天，我對於簽名、Nonce 等技術術語仍然一知半解，但我將 Bitfinex API 的網址直接提供給 ChatGPT，請他幫我寫程式，沒想到還真的寫出來了，過程中難免還是會出錯，但我把錯誤訊息丟回給 ChatGPT，它就能迅速幫我進行修改，最後終於完成，分享給大家

import requests
import json
import time
import hmac
import hashlib

# 設置您的 API 金鑰和秘密
api_key = 'YOUR_API_KEY'
api_secret = 'YOUR_API_SECRET'

# API 請求的資訊
api_path = 'v2/auth/r/wallets'
nonce = str(int(time.time() * 1000000))
body = {}

# 創建簽名
signature = '/api/' + api_path + nonce + json.dumps(body)
h = hmac.new(api_secret.encode(), signature.encode(), hashlib.sha384)
signature = h.hexdigest()

# 發送請求
url = 'https://api.bitfinex.com/' + api_path
headers = {
    'bfx-nonce': nonce,
    'bfx-apikey': api_key,
    'bfx-signature': signature,
    'content-type': 'application/json'
}

response = requests.post(url, headers=headers, data=json.dumps(body))

# 處理響應
if response.status_code == 200:
    wallets = response.json()
    # 查找 USD 餘額
    usd_balance = next((wallet for wallet in wallets if wallet[0] == 'funding' and wallet[1] == 'USD'), None)
    if usd_balance:
        print("USD Balance:", usd_balance[2])
    else:
        print("USD wallet not found.")
else:
    print("Error:", response.status_code, response.text)

加碼 Google Apps Script，因為我都用 Google Apps Script 串 Line 機器人，原以為有些東西只有 Python 套件才有，但反正最後還是成功寫出來了

function getUsdBalance() {
  var api_key = 'YOUR_API_KEY';
  var api_secret = 'YOUR_API_SECRET';

  var api_path = 'v2/auth/r/wallets';
  var nonce = new Date().getTime().toString() + '000'; // 增加三個零以提高精度
  var body = JSON.stringify({});

  var signature = '/api/' + api_path + nonce + body;
  var hmac = Utilities.computeHmacSignature(Utilities.MacAlgorithm.HMAC_SHA_384, signature, api_secret, Utilities.Charset.UTF_8);
  var signatureHex = arrayToHex(hmac);

  var url = 'https://api.bitfinex.com/' + api_path;
  var headers = {
    'bfx-nonce': nonce,
    'bfx-apikey': api_key,
    'bfx-signature': signatureHex,
    'Content-Type': 'application/json'
  };

  var options = {
    'method': 'post',
    'headers': headers,
    'payload': body,
    'muteHttpExceptions': true
  };

  var response = UrlFetchApp.fetch(url, options);
  if (response.getResponseCode() == 200) {
    var wallets = JSON.parse(response.getContentText());
    var usdBalance = wallets.find(function(wallet) {
      return wallet[0] === 'funding' && wallet[1] === 'USD';
    });
    if (usdBalance) {
      Logger.log("USD Balance: " + usdBalance[2]);
    } else {
      Logger.log("USD wallet not found.");
    }
  } else {
    Logger.log("Error: " + response.getResponseCode() + " - " + response.getContentText());
  }
}

function arrayToHex(byteArray) {
  var hexString = '';
  byteArray.forEach(function(byte) {
    var byteHex = ('0' + (byte & 0xFF).toString(16)).slice(-2);
    hexString += byteHex;
  });
  return hexString;
}