Congress

// Submitted by EthereumHistory (ethereumhistory.com)
contract owned {
    address public owner;

    function owned() {
        owner = msg.sender;
    }

    modifier onlyOwner {
        if (msg.sender != owner) throw;
        _
    }

    function transferOwnership(address newOwner) onlyOwner {
        owner = newOwner;
    }
}

contract Congress is owned {

    /* Contract Variables and events */
    uint public minimumQuorum;
    uint public debatingPeriodInMinutes;
    int public majorityMargin;
    Proposal[] public proposals;
    uint public numProposals;
    mapping (address => uint) public memberId;
    Member[] public members;

    event ProposalAdded(uint proposalID, address recipient, uint amount, string description);
    event Voted(uint proposalID, bool position, address voter, string justification);
    event ProposalTallied(uint proposalID, int result, uint quorum, bool active);
    event MembershipChanged(address member, bool isMember);
    event ChangeOfRules(uint minimumQuorum, uint debatingPeriodInMinutes, int majorityMargin);

    struct Proposal {
        address recipient;
        uint amount;
        string description;
        uint votingDeadline;
        bool executed;
        bool proposalPassed;
        uint numberOfVotes;
        int currentResult;
        bytes32 proposalHash;
        Vote[] votes;
        mapping (address => bool) voted;
    }

    struct Member {
        address member;
        bool canVote;
        string name;
        uint memberSince;
    }

    struct Vote {
        bool inSupport;
        address voter;
        string justification;
    }

    /* modifier that allows only shareholders to vote and create new proposals */
    modifier onlyMembers {
        if (memberId[msg.sender] == 0
        || !members[memberId[msg.sender]].canVote)
        throw;
        _
    }

    /* First time setup */
    function Congress(
        uint minimumQuorumForProposals,
        uint minutesForDebate,
        int marginOfVotesForMajority, address congressLeader
    ) {
        changeVotingRules(minimumQuorumForProposals, minutesForDebate, marginOfVotesForMajority);
        members.length++;
        members[0] = Member({member: 0, canVote: false, memberSince: now, name: ''});
        if (congressLeader != 0) owner = congressLeader;

    }

    /*make member*/
    function changeMembership(address targetMember, bool canVote, string memberName) onlyOwner {
        uint id;
        if (memberId[targetMember] == 0) {
           memberId[targetMember] = members.length;
           id = members.length++;
           members[id] = Member({member: targetMember, canVote: canVote, memberSince: now, name: memberName});
        } else {
            id = memberId[targetMember];
            Member m = members[id];
            m.canVote = canVote;
        }

        MembershipChanged(targetMember, canVote);

    }

    /*change rules*/
    function changeVotingRules(
        uint minimumQuorumForProposals,
        uint minutesForDebate,
        int marginOfVotesForMajority
    ) onlyOwner {
        minimumQuorum = minimumQuorumForProposals;
        debatingPeriodInMinutes = minutesForDebate;
        majorityMargin = marginOfVotesForMajority;

        ChangeOfRules(minimumQuorum, debatingPeriodInMinutes, majorityMargin);
    }

    /* Function to create a new proposal */
    function newProposal(
        address beneficiary,
        uint etherAmount,
        string JobDescription,
        bytes transactionBytecode
    )
        onlyMembers
        returns (uint proposalID)
    {
        proposalID = proposals.length++;
        Proposal p = proposals[proposalID];
        p.recipient = beneficiary;
        p.amount = etherAmount;
        p.description = JobDescription;
        p.proposalHash = sha3(beneficiary, etherAmount, transactionBytecode);
        p.votingDeadline = now + debatingPeriodInMinutes * 1 minutes;
        p.executed = false;
        p.proposalPassed = false;
        p.numberOfVotes = 0;
        ProposalAdded(proposalID, beneficiary, etherAmount, JobDescription);
        numProposals = proposalID+1;
    }

    /* function to check if a proposal code matches */
    function checkProposalCode(
        uint proposalNumber,
        address beneficiary,
        uint etherAmount,
        bytes transactionBytecode
    )
        constant
        returns (bool codeChecksOut)
    {
        Proposal p = proposals[proposalNumber];
        return p.proposalHash == sha3(beneficiary, etherAmount, transactionBytecode);
    }

    function vote(
        uint proposalNumber,
        bool supportsProposal,
        string justificationText
    )
        onlyMembers
        returns (uint voteID)
    {
        Proposal p = proposals[proposalNumber];         // Get the proposal
        if (p.voted[msg.sender] == true) throw;         // If has already voted, cancel
        p.voted[msg.sender] = true;                     // Set this voter as having voted
        p.numberOfVotes++;                              // Increase the number of votes
        if (supportsProposal) {                         // If they support the proposal
            p.currentResult++;                          // Increase score
        } else {                                        // If they don't
            p.currentResult--;                          // Decrease the score
        }
        // Create a log of this event
        Voted(proposalNumber,  supportsProposal, msg.sender, justificationText);
    }

    function executeProposal(uint proposalNumber, bytes transactionBytecode) returns (int result) {
        Proposal p = proposals[proposalNumber];
        /* Check if the proposal can be executed:
           - Has the voting deadline arrived?
           - Has it been already executed or is it being executed?
           - Does the transaction code match the proposal?
           - Has a minimum quorum?
        */

        if (now < p.votingDeadline
            || p.executed
            || p.proposalHash != sha3(p.recipient, p.amount, transactionBytecode)
            || p.numberOfVotes < minimumQuorum)
            throw;

        /* execute result */
        /* If difference between support and opposition is larger than margin */
        if (p.currentResult > majorityMargin) {
            // Avoid recursive calling

            p.executed = true;
            if (!p.recipient.call.value(p.amount * 1 ether)(transactionBytecode)) {
                throw;
            }

            p.proposalPassed = true;
        } else {
            p.proposalPassed = false;
        }
        // Fire Events
        ProposalTallied(proposalNumber, p.currentResult, p.numberOfVotes, p.proposalPassed);
    }
}

contract Association is owned {

    /* Contract Variables and events */
    uint public minimumQuorum;
    uint public debatingPeriodInMinutes;
    Proposal[] public proposals;
    uint public numProposals;
    token public sharesTokenAddress;

    event ProposalAdded(uint proposalID, address recipient, uint amount, string description);
    event Voted(uint proposalID, bool position, address voter);
    event ProposalTallied(uint proposalID, int result, uint quorum, bool active);
    event ChangeOfRules(uint minimumQuorum, uint debatingPeriodInMinutes, address sharesTokenAddress);

    struct Proposal {
        address recipient;
        uint amount;
        string description;
        uint votingDeadline;
        bool executed;
        bool proposalPassed;
        uint numberOfVotes;
        bytes32 proposalHash;
        Vote[] votes;
        mapping (address => bool) voted;
    }

    struct Vote {
        bool inSupport;
        address voter;
    }

    /* modifier that allows only shareholders to vote and create new proposals */
    modifier onlyShareholders {
        if (sharesTokenAddress.balanceOf(msg.sender) == 0) throw;
        _
    }

    /* First time setup */
    function Association(token sharesAddress, uint minimumSharesToPassAVote, uint minutesForDebate) {
        changeVotingRules(sharesAddress, minimumSharesToPassAVote, minutesForDebate);
    }

    /*change rules*/
    function changeVotingRules(token sharesAddress, uint minimumSharesToPassAVote, uint minutesForDebate) onlyOwner {
        sharesTokenAddress = token(sharesAddress);
        if (minimumSharesToPassAVote == 0 ) minimumSharesToPassAVote = 1;
        minimumQuorum = minimumSharesToPassAVote;
        debatingPeriodInMinutes = minutesForDebate;
        ChangeOfRules(minimumQuorum, debatingPeriodInMinutes, sharesTokenAddress);
    }

    /* Function to create a new proposal */
    function newProposal(
        address beneficiary,
        uint etherAmount,
        string JobDescription,
        bytes transactionBytecode
    )
        onlyShareholders
        returns (uint proposalID)
    {
        proposalID = proposals.length++;
        Proposal p = proposals[proposalID];
        p.recipient = beneficiary;
        p.amount = etherAmount;
        p.description = JobDescription;
        p.proposalHash = sha3(beneficiary, etherAmount, transactionBytecode);
        p.votingDeadline = now + debatingPeriodInMinutes * 1 minutes;
        p.executed = false;
        p.proposalPassed = false;
        p.numberOfVotes = 0;
        ProposalAdded(proposalID, beneficiary, etherAmount, JobDescription);
        numProposals = proposalID+1;
    }

    /* function to check if a proposal code matches */
    function checkProposalCode(
        uint proposalNumber,
        address beneficiary,
        uint etherAmount,
        bytes transactionBytecode
    )
        constant
        returns (bool codeChecksOut)
    {
        Proposal p = proposals[proposalNumber];
        return p.proposalHash == sha3(beneficiary, etherAmount, transactionBytecode);
    }

    /* */
    function vote(uint proposalNumber, bool supportsProposal)
        onlyShareholders
        returns (uint voteID)
    {
        Proposal p = proposals[proposalNumber];
        if (p.voted[msg.sender] == true) throw;

        voteID = p.votes.length++;
        p.votes[voteID] = Vote({inSupport: supportsProposal, voter: msg.sender});
        p.voted[msg.sender] = true;
        p.numberOfVotes = voteID +1;
        Voted(proposalNumber,  supportsProposal, msg.sender);
    }

    function executeProposal(uint proposalNumber, bytes transactionBytecode) returns (int result) {
        Proposal p = proposals[proposalNumber];
        /* Check if the proposal can be executed */
        if (now < p.votingDeadline  /* has the voting deadline arrived? */
            ||  p.executed        /* has it been already executed? */
            ||  p.proposalHash != sha3(p.recipient, p.amount, transactionBytecode)) /* Does the transaction code match the proposal? */
            throw;

        /* tally the votes */
        uint quorum = 0;
        uint yea = 0;
        uint nay = 0;

        for (uint i = 0; i <  p.votes.length; ++i) {
            Vote v = p.votes[i];
            uint voteWeight = sharesTokenAddress.balanceOf(v.voter);
            quorum += voteWeight;
            if (v.inSupport) {
                yea += voteWeight;
            } else {
                nay += voteWeight;
            }
        }

        /* execute result */
        if (quorum <= minimumQuorum) {
            /* Not enough significant voters */
            throw;
        } else if (yea > nay ) {
            /* has quorum and was approved */
            p.executed = true;
            if (!p.recipient.call.value(p.amount * 1 ether)(transactionBytecode)) {
                throw;
            }
            p.proposalPassed = true;
        } else {
            p.proposalPassed = false;
        }
        // Fire Events
        ProposalTallied(proposalNumber, result, quorum, p.proposalPassed);
    }
}

contract token { mapping (address => uint256) public balanceOf; }