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xrzhuang/eco_btn.sol

Created April 1, 2020 16:46
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  1. xrzhuang created this gist Apr 1, 2020.
    30 changes: 30 additions & 0 deletions eco_btn.sol
    View file
    Original file line number Diff line number Diff line change
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    pragma solidity ^0.4.18;

    contract EcoBtn {
    address private latestAddress;
    uint256 private latestBlock = 0;
    uint private amount = 0;

    uint public FIXED_AMOUNT_WEI = 1000000000000000000;

    constructor() public {
    latestBlock = block.number;
    latestAddress = msg.sender;
    }

    function claimTreasure() public{
    require(block.number - latestBlock >= 3);
    require(msg.sender == latestAddress);

    msg.sender.transfer(address(this).balance);
    amount = 0;
    }

    function pressBtn() public payable{
    require(msg.value >= FIXED_AMOUNT_WEI);

    msg.sender.transfer(msg.value-FIXED_AMOUNT_WEI);
    amount++;
    latestBlock = block.number;
    }
    }