Here is an article with a detailed tutorial on how to use the Binance API HMAC SHA256 authentication method in Ruby using Rails.

Authentication with Binance API using HMAC SHA256

Binance API uses HMAC SHA256 for authentication, which requires a secret key. You can generate a secret key by following these steps:

• Go to the [Binance Developer Dashboard]( and create an account if you don’t already have one.

• Click on “APIs & Services” and search for the Binance API documentation.

• Click on the “Authentication” section.

• Click on “Generate Secret Key” to generate a secret key.

Ruby Code

Here is an example of how to use the Binance API HMAC SHA256 authentication method in Ruby using Rails:

require 'base64'
require 'json'





Set your Binance API credentials and secret key
BINANCE_API_KEY = "YOUR_API_KEY"
BINANCE_SECRET_KEY = "YOUR_SECRET_KEY"

Set the endpoint URL for the Binance API
END_POINT = "
class Binance
ENDPOINT = "/v3/"
def initialize(api_key, api_secret)
@api_key = api_key
@api_secret = api_secret
end

Authenticate with Binance API using HMAC SHA256
def authenticate
signature = Digest::SHA256.hexdigest(@api_key + ':' + @api_secret)
url = "#{ENDPOINT}authorization/signature"
headers = {"Content-Type" => "application/x-www-form-urlencoded"}
data = { "grant_type" => "urn:binance:api:binance:sign", "client_id" => BINANCE_API_KEY, "client_secret" => signature }
response = HTTParty.get(url, headers: headers, body: data.to_url)
if response code == 200
JSON.parse(response.body)['signature']
else
null
end
end

Get information about the current user
def get_user_info
url = "#{ENDPOINT}users/me"
headers = {"Content-Type" => "application/json"}
response = HTTParty.get(url, headers: headers)
if response code == 200
JSON.parse(response.body)['info']
else
null
end
end

Get information about a specific user
def get_user_info(user_id)
url = "#{ENDPOINT}users/me?userId=#{user_id}"
headers = {"Content-Type" => "application/json"}
response = HTTParty.get(url, headers: headers)
if response code == 200
JSON.parse(response.body)['info']
else
null
end
end
end

Usage example:
binance = Binance.new(BINANCE_API_KEY, BINANCE_SECRET_KEY)
signature = binance.authenticate

Authenticate with API using signature
user_info = binance.get_user_info
inserts user_info

Get information about a specific user
user_id = 12345
user_info = binance.get_user_info(user_id)
inserts user_info

Important Notes

• Make sure you keep your secret key safe and do not hardcode it in your application.

• You should also make sure that the HMAC algorithm is enabled in the Binance API documentation. Currently, only SHA256 is supported.

• If you encounter any authentication issues or error responses from the Binance API, please refer to the Binance API documentation for troubleshooting instructions.

Hope this helps! If you have any questions or need further assistance, please let us know.