pragma solidity ^0.4.19;

contract Transaction{
    event ValueLogger(uint);
    event Logger(address);

    address owner;

    modifier isOwner{
        require(owner == msg.sender);
        _;
    }

    modifier validValue{
        assert(msg.value >= 1 ether);
        _;
    }

    function Transaction() public {
        owner = msg.sender;
    }

    function() payable public isOwner validValue {
        ValueLogger(msg.value);
        Logger(msg.sender);
    }
}