function lockTokens(uint _multiplier) {
	    require(msg.sender == creditDaoAddress);
	    
	    uint currentBalance = creditBitContract.balanceOf(address(this)) / 10**8;
	    uint yearlyBlockCount = creditBondContract.yearlyBlockCount();
	    creditBitContract.lockBalance(currentBalance, yearlyBlockCount * _multiplier);
	    lockedCore = creditBitContract.lockedBalanceOf(address(this));
	}