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@whilb
Created June 17, 2020 20:59
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Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.5.9+commit.a1d534e.js&optimize=true&gist=
pragma solidity >=0.4.22 <0.6.0;
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.
constructor(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 view 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;
}
}
}
pragma solidity ^0.5.0;
contract Owned {
constructor() public { owner = msg.sender; }
address payable owner;
modifier onlyOwner {
require(
msg.sender == owner,
"Only owner can call this function."
);
_;
}
}
contract Entry is Owned {
address public associated;
string public shorturl;
string public longurl;
bool public exists = false;
constructor(address payable owner_, address associated_, string memory shorturl_, string memory longurl_) public {
owner = owner_;
associated = associated_;
shorturl = shorturl_;
longurl = longurl_;
exists = true;
}
function associate(address associated_) public onlyOwner {
associated = associated_;
}
function change(string memory longurl_) public onlyOwner {
longurl = longurl_;
}
function unlock() public onlyOwner {
exists = false;
}
function wipe() public onlyOwner {
if (msg.sender == owner) selfdestruct(owner);
}
}
contract Directory {
mapping(string => Entry) entries;
function lookup(string memory shorturl_) public {
}
function createEntry(string memory shorturl_, string memory longurl_) public {
require(!entries[shorturl_].exists(), "Entry already exists!");
Entry entry_ = new Entry(msg.sender, msg.sender, shorturl_, longurl_);
insert(entry_);
}
function insert(Entry entry_) internal {
entries[entry_.shorturl()] = entry_;
}
}
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