pragma solidity >=0.4.22; contract Faucet { mapping(address => bool) processed; uint quota = 100 ether; address owner; constructor() public payable { owner = msg.sender; } function request(address payable requestor) public { require(msg.sender == owner); require(quota <= address(this).balance); require(!processed[requestor]); processed[requestor] = true; requestor.transfer(quota); } function money() public view returns(uint) { return address(this).balance; } }