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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) {
chairperson = msg.sender;
voters[chairperson].weight = 1;
proposals.length = _numProposals;
}
/// Give $(voter) the right to vote on this ballot.
/// May only be called by $(chairperson).
function giveRightToVote(address voter) {
if (msg.sender != chairperson || voters[voter].voted) return;
voters[voter].weight = 1;
}
/// Delegate your vote to the voter $(to).
function delegate(address to) {
Voter 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 delegate = voters[to];
if (delegate.voted)
proposals[delegate.vote].voteCount += sender.weight;
else
delegate.weight += sender.weight;
}
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