Chore/freeze base url

lib/binance/client/rest/clients.rb

@@ -48,6 +48,17 @@ def withdraw_client(api_key, secret_key, adapter)
           conn.adapter adapter
         end
       end
+
+      def withdraw_sapi_client(api_key, secret_key, adapter)
+        Faraday.new(url: "#{BASE_URL}/sapi") do |conn|
+          conn.request :url_encoded
+          conn.response :json, content_type: /\bjson$/
+          conn.headers['X-MBX-APIKEY'] = api_key
+          conn.use TimestampRequestMiddleware
+          conn.use SignRequestMiddleware, secret_key
+          conn.adapter adapter
+        end
+      end
     end
   end
-end
+end

lib/binance/client/rest/endpoints.rb

@@ -26,6 +26,7 @@ class REST
 
         # Withdraw API Endpoints
         withdraw:         'v3/withdraw.html',
+        withdraw_sapi:    'v1/capital/withdraw/apply',
         deposit_history:  'v3/depositHistory.html',
         withdraw_history: 'v3/withdrawHistory.html',
         deposit_address:  'v3/depositAddress.html',

lib/binance/client/rest/methods.rb

@@ -79,6 +79,9 @@ class REST
         # #withdraw!
         { name: :withdraw!, client: :withdraw,
           action: :post, endpoint: :withdraw },
+        # #withdraw_sapi!
+        { name: :withdraw_sapi!, client: :withdraw_sapi_client,
+          action: :post, endpoint: :withdraw_sapi },
         # #deposit_history
         { name: :deposit_history, client: :withdraw,
           action: :get, endpoint: :deposit_history },