func: constructor(address _traded_token,uint256 _eth_seed_amount, uint256 _traded_token_seed_amount, uint256 _commission_ratio) public {
      admin = tx.origin;
      platform = msg.sender; 
      traded_token = _traded_token;
      eth_seed_amount = _eth_seed_amount;
      traded_token_seed_amount = _traded_token_seed_amount;
      commission_ratio = _commission_ratio;
    }