如何通过RStudio调用Binance API创建新订单？

Let's break down where you went wrong and walk through a working solution to create orders via the Binance API in R:

Key Issues in Your Current Script #

• Wrong API Endpoint: You're using /api/v3/account (for fetching account details) instead of the correct endpoint for creating orders: POST /api/v3/order
• Incorrect Request Method: Binance requires a POST request for order creation, not GET
• Stale Timestamp: The timestamp must be a current Unix timestamp in milliseconds, not a hardcoded old value
• Missing Signature Generation: You didn't implement the HMAC SHA256 signing logic required for authenticated endpoints

Working R Script for Binance Order Creation #

First, make sure you have the required packages installed:

install.packages(c("httr", "digest"))

Then use this script as a template:

library(httr)
library(digest)

# Replace these with your actual Binance API credentials
api_key <- "YOUR_API_KEY_HERE"
api_secret <- "YOUR_API_SECRET_HERE"

# API endpoint for creating orders
url <- "https://api.binance.com/api/v3/order"

# Generate current Unix timestamp in milliseconds
timestamp <- as.integer(Sys.time() * 1000)

# Define order parameters (adjust these as needed)
order_params <- list(
  symbol = "ETHBTC",
  side = "BUY",
  type = "MARKET",
  quantity = 0.001, # Note: Use a valid minimum quantity for the pair
  recvWindow = 5000,
  timestamp = timestamp
)

# Generate the signature: Convert params to URL query string, then HMAC SHA256 with secret key
query_string <- paste(names(order_params), order_params, sep = "=", collapse = "&")
signature <- hmac(api_secret, query_string, algo = "sha256")

# Add the signature to your params
order_params$signature <- signature

# Send the POST request
response <- POST(
  url = url,
  add_headers("X-MBX-APIKEY" = api_key),
  body = order_params,
  encode = "form"
)

# Check the response
content(response)

Important Notes #

• Test First: Use Binance's Testnet (https://testnet.binance.vision/api/v3/order) before using the mainnet to avoid accidental trades
• Quantity Validation: Ensure your quantity matches the minimum tradable size for the symbol (check Binance's trading rules for each pair)
• Signature Logic: The signature is generated from the URL-encoded query string of all parameters except the API key. The HMAC SHA256 hash must be in lowercase hex format (the digest::hmac function handles this by default)
• Timestamp Sync: If you get "timestamp expired" errors, make sure your system clock is synchronized (Binance allows a small window via recvWindow, but it's best to have accurate time)

内容的提问来源于stack exchange，提问作者Bart