prevent vote overwrite

2019-02-20 01:16:42 -03:00 · 2019-02-20 01:16:42 -03:00 · ff3aa67510
parent 26e697584e
commit ff3aa67510
1 changed files with 1 additions and 0 deletions
--- a/contracts/democracy/Proposal.sol
+++ b/contracts/democracy/Proposal.sol
@ -75,6 +75,7 @@ contract Proposal is Controlled, MessageSigned {
        require(block.number > voteBlockEnd, "Voting running");
        require(MerkleProof.verifyProof(_proof, signatures[_position], keccak256(_signature)), "Invalid proof");
        address _voter = recoverAddress(keccak256(abi.encodePacked(address(this), _vote)), _signature);
+        require(voteMap[_voter] == Vote.Null, "Already tabulated");
        voteMap[_voter] = _vote;
        setTabulation(_voter, _voter, _vote);
    }