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julianduque/HelloWorld.sol

Last active Oct 27, 2017
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pragma solidity ^0.4.11;
contract HelloWorld {
uint public balance;
address public owner;
function HelloWorld() public {
owner = msg.sender;
balance = 0;
}
function update() public payable isOwner() {
balance = msg.value;
}
modifier isOwner() {
require(msg.sender == owner);
_;
}
}
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