func: function validateTradeInput( ERC20 source, uint srcAmount ) constant internal returns(bool) {
          if( source != ETH_TOKEN_ADDRESS && msg.value > 0 ) {
              
              ErrorReport( tx.origin, 0x85000000, 0 );
              return false;
          }
          else if( source == ETH_TOKEN_ADDRESS && msg.value != srcAmount ) {
              
              ErrorReport( tx.origin, 0x85000001, msg.value );
              return false;
          }
          else if( source != ETH_TOKEN_ADDRESS ) {
              if( source.allowance(msg.sender,this) < srcAmount ) {
                  
                  ErrorReport( tx.origin, 0x85000002, msg.value );
                  return false;
              }
          }
  
          return true;
  
      }