ubinix-warun · November 1, 2020 10:29 · Apr 21, 2019
diff --git a/ballot.sol b/ballot.sol
@@ -0,0 +1,52 @@
+pragma solidity ^0.4.0;
+contract Ballot {
+
+    struct Voter {
+        uint weight;
+        bool voted;
+        uint8 vote;
+       // address delegate;
+    }
+    struct Proposal {
+        uint voteCount; // could add other data about proposal
+    }
+
+    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 = 2;
+        proposals.length = _numProposals; 
+    }
+
+    /// Give $(toVoter) the right to vote on this ballot.
+    /// May only be called by $(chairperson).
+    function register(address toVoter) public {
+        if (msg.sender != chairperson || voters[toVoter].voted) return;
+        voters[toVoter].weight = 1;
+        voters[toVoter].voted = false;
+    }
+
+    /// 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;
+            }
+    }
+}
+