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March 6, 2018 13:17
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Created using browser-solidity: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://ethereum.github.io/browser-solidity/#version=soljson-v0.4.20+commit.3155dd80.js&optimize=false&gist=
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pragma solidity ^0.4.0; | |
contract Ballot { | |
struct Voter { | |
uint weight; | |
bool voted; | |
uint8 vote; | |
address delegate; | |
} | |
struct Proposal { | |
uint voteCount; | |
} | |
address chairperson; | |
mapping(address => Voter) voters; | |
Proposal[] proposals; | |
/// Create a new ballot with $(_numProposals) different proposals. | |
function Ballot(uint8 _numProposals) public { | |
chairperson = msg.sender; | |
voters[chairperson].weight = 1; | |
proposals.length = _numProposals; | |
} | |
/// Give $(toVoter) the right to vote on this ballot. | |
/// May only be called by $(chairperson). | |
function giveRightToVote(address toVoter) public { | |
if (msg.sender != chairperson || voters[toVoter].voted) return; | |
voters[toVoter].weight = 1; | |
} | |
/// Delegate your vote to the voter $(to). | |
function delegate(address to) public { | |
Voter storage sender = voters[msg.sender]; // assigns reference | |
if (sender.voted) return; | |
while (voters[to].delegate != address(0) && voters[to].delegate != msg.sender) | |
to = voters[to].delegate; | |
if (to == msg.sender) return; | |
sender.voted = true; | |
sender.delegate = to; | |
Voter storage delegateTo = voters[to]; | |
if (delegateTo.voted) | |
proposals[delegateTo.vote].voteCount += sender.weight; | |
else | |
delegateTo.weight += sender.weight; | |
} | |
/// Give a single vote to proposal $(toProposal). | |
function vote(uint8 toProposal) public { | |
Voter storage sender = voters[msg.sender]; | |
if (sender.voted || toProposal >= proposals.length) return; | |
sender.voted = true; | |
sender.vote = toProposal; | |
proposals[toProposal].voteCount += sender.weight; | |
} | |
function winningProposal() public constant returns (uint8 _winningProposal) { | |
uint256 winningVoteCount = 0; | |
for (uint8 prop = 0; prop < proposals.length; prop++) | |
if (proposals[prop].voteCount > winningVoteCount) { | |
winningVoteCount = proposals[prop].voteCount; | |
_winningProposal = prop; | |
} | |
} | |
} |
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pragma solidity ^0.4.19; | |
contract HelloWorld { | |
function helloWorld() public returns(string) { | |
return "Hello World"; | |
} | |
} |
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pragma solidity ^0.4.19; | |
contract PizzaFactory { | |
// Define Owner | |
address public linkPizzaPlace; | |
function PizzaFactory(string _pizzaName) public { | |
linkPizzaPlace = msg.sender; | |
} | |
// Define Payment Status | |
uint public totalAmountPaid; | |
// Define Pizza (Wei) | |
string public pizzaName = "Peperoni"; | |
uint public pizzaPrice = 100 ether; | |
// Define Users | |
mapping(address => uint) public users; | |
// Pay for Pizza | |
function payPizza() public payable { | |
// Do not allow Contract owner to pay for Pizza | |
require(msg.sender != linkPizzaPlace); | |
// Save Payment | |
totalAmountPaid += msg.value; | |
users[msg.sender] = msg.value; | |
} | |
// Make Pizza | |
function orderPizza() public returns(string) { | |
// Check if totalAmountPaid = pizzaPrice | |
if(totalAmountPaid == pizzaPrice) { | |
// Pay Owner | |
linkPizzaPlace.transfer(totalAmountPaid); | |
totalAmountPaid = 0; | |
// Return Success Message | |
return "Pizza is being made. Thanks!"; | |
} else { | |
// Otherwise Return Fail Message | |
return "Nope, no pizza for you!"; | |
} | |
} | |
} |
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