add public adapter for public withdraw endpoints

lib/binance/client/rest.rb

@@ -41,6 +41,8 @@ def initialize(api_key: '', secret_key: '',
  @library[:signed] = signed_client api_key, secret_key, adapter
  # Endpoint requires an api_key and secret_key - for the Withdraw API
  @library[:withdraw] = withdraw_client api_key, secret_key, adapter
+ # Endpoint doesn't require an api_key or secret_key
+ @library[:public_withdraw] = public_withdraw_client adapter
 
  end
 
@@ -75,6 +77,14 @@ def withdraw_client(api_key, secret_key, adapter)
  conn.adapter adapter
  end
  end
+
+ def public_withdraw_client(adapter)
+ Faraday.new(url: "#{BASE_URL}/wapi") do |conn|
+ conn.request :json
+ conn.response :json, content_type: /\bjson$/
+ conn.adapter adapter
+ end
+ end
 
  def verified_client(api_key, adapter)
  Faraday.new(url: "#{BASE_URL}/api") do |conn|