WebSocket Challenge

Solving the challenge:

1. Create WebSocket and set binaryType = "arraybuffer";

2. Registration:

   /** Think about cool participant name and then send a registration message **/
   
   { "name":"SuperHero", "command": "challenge accepted" }

3. The server will respond with:

   /** 
      Message contains an authentication token which you will attach to your messages 
      for identification and the next task name.
   **/
   {"message":"You successfully accept challenge","next":"arithmetic","token":"eae34860c6f507f2"}

4. Request the next task with:

   { "token": my_saved_token, "command": saved_next_task_name }

   There are 3 simple tasks:

   {"name":"arithmetic","task":{"sign": OPERATION ,"values": ARRAY}}
      
   /**
       where:
       ARRAY {Array}        numbers array, length = 4;
       OPERATION {String}   random operator (+, -, *) which corresponds to an arithmetic operation 
                            you have to perform with ARRAY values
   
       and then send answer with:
   **/  
   { "token": my_saved_token, "command": "arithmetic", "answer": RESULT }

   /** if answer is correct, server will respond with: **/
      
   { "message":"You solve task","nextTask":"function_evaluation" }
      
    /** request the next task with: **/
   
   { "token": my_saved_token, "command": saved_next_task_name }
      

   2nd task:

      
   /** Server will send you the following message **/
      
   { "name":"function_evaluation","task": { "fn": STRING } }
   
   /** where STRING is String representation of function.
       ---------------------------------------------
       you have to somehow execute this function and send it's result 
   **/
   
   { "token": my_saved_token, "command": "function_evaluation", "answer": RESULT }

   /** if RESULT is correct, server will respond with **/
   
   { "message": "You solve task", "nextTask": "binary_arithmetic" }

   3nd task:

      
   /** Server will send you the following message **/
      
   { "name":"binary_arithmetic","task": { "bits": BITS} }
   
   /** where BITS is either 8 or 16.
       ---------------------------------------------
       Immediately after that you should receive a binary message (16 bytes) 
       which you should treat as a Uint8Array or Uint16Array 
       depending on the bits field. Your task is to sum the resulting array's 
       elements and send the result: 
   **/
   
   { "token": my_saved_token, "command": "binary_arithmetic", "answer": RESULT }

   /** if RESULT is correct, server will respond with **/
   
   { "message": "You solve task", "nextTask":"win" }

   And finish the challenge!

   /** Request the win! **/
      
   { "token": my_saved_token, "command": "win" }

5. Send the uniq code