code: function stopMining( nRoundIndex )
  {
  	if ( _bBrowser && !_bWallet )
  	{
  		throw new Error( 'I am not be able to run in a Web Browser.' );
  	}
  	if ( 'number' !== typeof nRoundIndex || nRoundIndex < 1 )
  	{
  		return false;
  	}
  
  	//	stop
  	_pow_miner.stopMining();
  
  	//	...
  	return true;
  }
docs: stop mining
  @param	{number}	nRoundIndex
  @return	{boolean}