kejace · July 21, 2018 01:42
diff --git a/ballot.sol b/ballot.sol
 pragma solidity ^0.4.22;

 /// @title Voting with delegation.
 contract Ballot {
    // This declares a new complex type which will
    // be used for variables later.
    // It will represent a single voter.
    struct Voter {
        uint weight; // weight is accumulated by delegation
        bool voted;  // if true, that person already voted
        address delegate; // person delegated to
        uint vote;   // index of the voted proposal
    }

    // This is a type for a single proposal.
    struct Proposal {
        bytes32 name;   // short name (up to 32 bytes)
        uint voteCount; // number of accumulated votes
    }

    address public chairperson;

    // This declares a state variable that
    // stores a `Voter` struct for each possible address.
    mapping(address => Voter) public voters;

    // A dynamically-sized array of `Proposal` structs.
    Proposal[] public proposals;

    /// Create a new ballot to choose one of `proposalNames`.
    function Ballot(bytes32[] proposalNames) public {
        chairperson = msg.sender;
        voters[chairperson].weight = 1;

        // For each of the provided proposal names,
        // create a new proposal object and add it
        // to the end of the array.
        for (uint i = 0; i < proposalNames.length; i++) {
            // `Proposal({...})` creates a temporary
            // Proposal object and `proposals.push(...)`
            // appends it to the end of `proposals`.
            proposals.push(Proposal({
                name: proposalNames[i],
                voteCount: 0
            }));
        }
    }

    // Give `voter` the right to vote on this ballot.
    // May only be called by `chairperson`.
    function giveRightToVote(address voter) public {
        // If the argument of `require` evaluates to `false`,
        // it terminates and reverts all changes to
        // the state and to Ether balances. It is often
        // a good idea to use this if functions are
        // called incorrectly. But watch out, this
        // will currently also consume all provided gas
        // (this is planned to change in the future).
        require(
            (msg.sender == chairperson) &&
            !voters[voter].voted &&
            (voters[voter].weight == 0)
        );
        voters[voter].weight = 1;
    }

    /// Delegate your vote to the voter `to`.
    function delegate(address to) public {
        // assigns reference
        Voter storage sender = voters[msg.sender];
        require(!sender.voted);

        // Self-delegation is not allowed.
        require(to != msg.sender);

        // Forward the delegation as long as
        // `to` also delegated.
        // In general, such loops are very dangerous,
        // because if they run too long, they might
        // need more gas than is available in a block.
        // In this case, the delegation will not be executed,
        // but in other situations, such loops might
        // cause a contract to get "stuck" completely.
        while (voters[to].delegate != address(0)) {
            to = voters[to].delegate;

            // We found a loop in the delegation, not allowed.
            require(to != msg.sender);
        }

        // Since `sender` is a reference, this
        // modifies `voters[msg.sender].voted`
        sender.voted = true;
        sender.delegate = to;
        Voter storage delegate_ = voters[to];
        if (delegate_.voted) {
            // If the delegate already voted,
            // directly add to the number of votes
            proposals[delegate_.vote].voteCount += sender.weight;
        } else {
            // If the delegate did not vote yet,
            // add to her weight.
            delegate_.weight += sender.weight;
        }
    }

    /// Give your vote (including votes delegated to you)
    /// to proposal `proposals[proposal].name`.
    function vote(uint proposal) public {
        Voter storage sender = voters[msg.sender];
        require(!sender.voted);
        sender.voted = true;
        sender.vote = proposal;

        // If `proposal` is out of the range of the array,
        // this will throw automatically and revert all
        // changes.
        proposals[proposal].voteCount += sender.weight;
    }

    /// @dev Computes the winning proposal taking all
    /// previous votes into account.
    function winningProposal() public view
            returns (uint winningProposal_)
    {
        uint winningVoteCount = 0;
        for (uint p = 0; p < proposals.length; p++) {
            if (proposals[p].voteCount > winningVoteCount) {
                winningVoteCount = proposals[p].voteCount;
                winningProposal_ = p;
            }
        }
    }

    // Calls winningProposal() function to get the index
    // of the winner contained in the proposals array and then
    // returns the name of the winner
    function winnerName() public view
            returns (bytes32 winnerName_)
    {
        winnerName_ = proposals[winningProposal()].name;
    }
 }
diff --git a/Exchange.sol b/Exchange.sol

 contract TokenControllerI {
    function transferAllowed(address _from, address _to) external view returns (bool);
 }

 contract TokenController is TokenControllerI{

    uint MIN_COUNT = 10; // this should be _from specific
    address tokenContract = 0xabba;
    address registryContract = 0xdeadbeef;
    
    mapping(address => uint) numTransfers;
    
    function transferAllowed(address _from, address _to) external view returns (bool){
        tallyTransfer(_from, _to);
        if(numTransfers[_from] > MIN_COUNT){
            return true;
        } else {
            return false;
        }
    }
    
    function tallyTransfer (address _from, address _to) private {
        // insert proper logic here
        if(msg.sender == tokenContract && _to == registryContract){ 
            numTransfers[_from]++;
        } else {
            // someone else than tokenContract called tallyTransfer so do nothing
        }
    }
 }
	pragma solidity ^0.4.22;

	/// @title Voting with delegation.
	contract Ballot {
	// This declares a new complex type which will
	// be used for variables later.
	// It will represent a single voter.
	struct Voter {
	uint weight; // weight is accumulated by delegation
	bool voted; // if true, that person already voted
	address delegate; // person delegated to
	uint vote; // index of the voted proposal
	}

	// This is a type for a single proposal.
	struct Proposal {
	bytes32 name; // short name (up to 32 bytes)
	uint voteCount; // number of accumulated votes
	}

	address public chairperson;

	// This declares a state variable that
	// stores a `Voter` struct for each possible address.
	mapping(address => Voter) public voters;

	// A dynamically-sized array of `Proposal` structs.
	Proposal[] public proposals;

	/// Create a new ballot to choose one of `proposalNames`.
	function Ballot(bytes32[] proposalNames) public {
	chairperson = msg.sender;
	voters[chairperson].weight = 1;

	// For each of the provided proposal names,
	// create a new proposal object and add it
	// to the end of the array.
	for (uint i = 0; i < proposalNames.length; i++) {
	// `Proposal({...})` creates a temporary
	// Proposal object and `proposals.push(...)`
	// appends it to the end of `proposals`.
	proposals.push(Proposal({
	name: proposalNames[i],
	voteCount: 0
	}));
	}
	}

	// Give `voter` the right to vote on this ballot.
	// May only be called by `chairperson`.
	function giveRightToVote(address voter) public {
	// If the argument of `require` evaluates to `false`,
	// it terminates and reverts all changes to
	// the state and to Ether balances. It is often
	// a good idea to use this if functions are
	// called incorrectly. But watch out, this
	// will currently also consume all provided gas
	// (this is planned to change in the future).
	require(
	(msg.sender == chairperson) &&
	!voters[voter].voted &&
	(voters[voter].weight == 0)
	);
	voters[voter].weight = 1;
	}

	/// Delegate your vote to the voter `to`.
	function delegate(address to) public {
	// assigns reference
	Voter storage sender = voters[msg.sender];
	require(!sender.voted);

	// Self-delegation is not allowed.
	require(to != msg.sender);

	// Forward the delegation as long as
	// `to` also delegated.
	// In general, such loops are very dangerous,
	// because if they run too long, they might
	// need more gas than is available in a block.
	// In this case, the delegation will not be executed,
	// but in other situations, such loops might
	// cause a contract to get "stuck" completely.
	while (voters[to].delegate != address(0)) {
	to = voters[to].delegate;

	// We found a loop in the delegation, not allowed.
	require(to != msg.sender);
	}

	// Since `sender` is a reference, this
	// modifies `voters[msg.sender].voted`
	sender.voted = true;
	sender.delegate = to;
	Voter storage delegate_ = voters[to];
	if (delegate_.voted) {
	// If the delegate already voted,
	// directly add to the number of votes
	proposals[delegate_.vote].voteCount += sender.weight;
	} else {
	// If the delegate did not vote yet,
	// add to her weight.
	delegate_.weight += sender.weight;
	}
	}

	/// Give your vote (including votes delegated to you)
	/// to proposal `proposals[proposal].name`.
	function vote(uint proposal) public {
	Voter storage sender = voters[msg.sender];
	require(!sender.voted);
	sender.voted = true;
	sender.vote = proposal;

	// If `proposal` is out of the range of the array,
	// this will throw automatically and revert all
	// changes.
	proposals[proposal].voteCount += sender.weight;
	}

	/// @dev Computes the winning proposal taking all
	/// previous votes into account.
	function winningProposal() public view
	returns (uint winningProposal_)
	{
	uint winningVoteCount = 0;
	for (uint p = 0; p < proposals.length; p++) {
	if (proposals[p].voteCount > winningVoteCount) {
	winningVoteCount = proposals[p].voteCount;
	winningProposal_ = p;
	}
	}
	}

	// Calls winningProposal() function to get the index
	// of the winner contained in the proposals array and then
	// returns the name of the winner
	function winnerName() public view
	returns (bytes32 winnerName_)
	{
	winnerName_ = proposals[winningProposal()].name;
	}
	}

	contract TokenControllerI {
	function transferAllowed(address _from, address _to) external view returns (bool);
	}

	contract TokenController is TokenControllerI{

	uint MIN_COUNT = 10; // this should be _from specific
	address tokenContract = 0xabba;
	address registryContract = 0xdeadbeef;

	mapping(address => uint) numTransfers;

	function transferAllowed(address _from, address _to) external view returns (bool){
	tallyTransfer(_from, _to);
	if(numTransfers[_from] > MIN_COUNT){
	return true;
	} else {
	return false;
	}
	}

	function tallyTransfer (address _from, address _to) private {
	// insert proper logic here
	if(msg.sender == tokenContract && _to == registryContract){
	numTransfers[_from]++;
	} else {
	// someone else than tokenContract called tallyTransfer so do nothing
	}
	}
	}