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/**
 *Submitted for verification at Etherscan.io on 2018-12-04
*/

pragma solidity ^0.4.21;
contract LockRequestable {
    uint256 public lockRequestCount;
    function LockRequestable() public {
        lockRequestCount = 0;
    }
    function generateLockId() internal returns (bytes32 lockId) {
        return keccak256(block.blockhash(block.number - 1), address(this), ++lockRequestCount);
    }
}
contract CustodianUpgradeable is LockRequestable {
    struct CustodianChangeRequest {
        address proposedNew;
    }
    address public custodian;
    mapping (bytes32 => CustodianChangeRequest) public custodianChangeReqs;
    function CustodianUpgradeable(
        address _custodian
    )
      LockRequestable()
      public
    {
        custodian = _custodian;
    }
    modifier onlyCustodian {
        require(msg.sender == custodian);
        _;
    }
    function requestCustodianChange(address _proposedCustodian) public returns (bytes32 lockId) {
        require(_proposedCustodian != address(0));
        lockId = generateLockId();
        custodianChangeReqs[lockId] = CustodianChangeRequest({
            proposedNew: _proposedCustodian
        });
        emit CustodianChangeRequested(lockId, msg.sender, _proposedCustodian);
    }
    function confirmCustodianChange(bytes32 _lockId) public onlyCustodian {
        custodian = getCustodianChangeReq(_lockId);
        delete custodianChangeReqs[_lockId];
        emit CustodianChangeConfirmed(_lockId, custodian);
    }
    function getCustodianChangeReq(bytes32 _lockId) private view returns (address _proposedNew) {
        CustodianChangeRequest storage changeRequest = custodianChangeReqs[_lockId];
        require(changeRequest.proposedNew != 0);
        return changeRequest.proposedNew;
    }
    event CustodianChangeRequested(
        bytes32 _lockId,
        address _msgSender,
        address _proposedCustodian
    );
    event CustodianChangeConfirmed(bytes32 _lockId, address _newCustodian);
}
contract ERC20ImplUpgradeable is CustodianUpgradeable  {
    struct ImplChangeRequest {
        address proposedNew;
    }
    ERC20Impl public erc20Impl;
    mapping (bytes32 => ImplChangeRequest) public implChangeReqs;
    function ERC20ImplUpgradeable(address _custodian) CustodianUpgradeable(_custodian) public {
        erc20Impl = ERC20Impl(0x0);
    }
    modifier onlyImpl {
        require(msg.sender == address(erc20Impl));
        _;
    }
    function requestImplChange(address _proposedImpl) public returns (bytes32 lockId) {
        require(_proposedImpl != address(0));
        lockId = generateLockId();
        implChangeReqs[lockId] = ImplChangeRequest({
            proposedNew: _proposedImpl
        });
        emit ImplChangeRequested(lockId, msg.sender, _proposedImpl);
    }
    function confirmImplChange(bytes32 _lockId) public onlyCustodian {
        erc20Impl = getImplChangeReq(_lockId);
        delete implChangeReqs[_lockId];
        emit ImplChangeConfirmed(_lockId, address(erc20Impl));
    }
    function getImplChangeReq(bytes32 _lockId) private view returns (ERC20Impl _proposedNew) {
        ImplChangeRequest storage changeRequest = implChangeReqs[_lockId];
        require(changeRequest.proposedNew != address(0));
        return ERC20Impl(changeRequest.proposedNew);
    }
    event ImplChangeRequested(
        bytes32 _lockId,
        address _msgSender,
        address _proposedImpl
    );
    event ImplChangeConfirmed(bytes32 _lockId, address _newImpl);
}
contract ERC20Interface {
  function totalSupply() public view returns (uint256);
  function balanceOf(address _owner) public view returns (uint256 balance);
  function transfer(address _to, uint256 _value) public returns (bool success);
  function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
  function approve(address _spender, uint256 _value) public returns (bool success);
  function allowance(address _owner, address _spender) public view returns (uint256 remaining);
  event Transfer(address indexed _from, address indexed _to, uint256 _value);
  event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
contract ERC20Proxy is ERC20Interface, ERC20ImplUpgradeable {
    string public name;
    string public symbol;
    uint8 public decimals;
    function ERC20Proxy(
        string _name,
        string _symbol,
        uint8 _decimals,
        address _custodian
    )
        ERC20ImplUpgradeable(_custodian)
        public
    {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
    }
    function totalSupply() public view returns (uint256) {
        return erc20Impl.totalSupply();
    }
    function balanceOf(address _owner) public view returns (uint256 balance) {
        return erc20Impl.balanceOf(_owner);
    }
    function emitTransfer(address _from, address _to, uint256 _value) public onlyImpl {
        emit Transfer(_from, _to, _value);
    }
    function transfer(address _to, uint256 _value) public returns (bool success) {
        return erc20Impl.transferWithSender(msg.sender, _to, _value);
    }
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        return erc20Impl.transferFromWithSender(msg.sender, _from, _to, _value);
    }
    function emitApproval(address _owner, address _spender, uint256 _value) public onlyImpl {
        emit Approval(_owner, _spender, _value);
    }
    function approve(address _spender, uint256 _value) public returns (bool success) {
        return erc20Impl.approveWithSender(msg.sender, _spender, _value);
    }
    function increaseApproval(address _spender, uint256 _addedValue) public returns (bool success) {
        return erc20Impl.increaseApprovalWithSender(msg.sender, _spender, _addedValue);
    }
    function decreaseApproval(address _spender, uint256 _subtractedValue) public returns (bool success) {
        return erc20Impl.decreaseApprovalWithSender(msg.sender, _spender, _subtractedValue);
    }
    function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
        return erc20Impl.allowance(_owner, _spender);
    }
    function burn(uint256 _value) public returns (bool success) {
      return erc20Impl.burnWithSender(msg.sender, _value);
    }
}
contract ERC20Impl is CustodianUpgradeable {
    struct PendingPrint {
        address receiver;
        uint256 value;
    }
    ERC20Proxy public erc20Proxy;
    ERC20Store public erc20Store;
    address public sweeper;
    bytes32 public sweepMsg;
    mapping (address => bool) public sweptSet;
    mapping (bytes32 => PendingPrint) public pendingPrintMap;
    function ERC20Impl(
          address _erc20Proxy,
          address _erc20Store,
          address _custodian,
          address _sweeper
    )
        CustodianUpgradeable(_custodian)
        public
    {
        require(_sweeper != 0);
        erc20Proxy = ERC20Proxy(_erc20Proxy);
        erc20Store = ERC20Store(_erc20Store);
        sweeper = _sweeper;
        sweepMsg = keccak256(address(this), "sweep");
    }
    modifier onlyProxy {
        require(msg.sender == address(erc20Proxy));
        _;
    }
    modifier onlySweeper {
        require(msg.sender == sweeper);
        _;
    }
    function approveWithSender(
        address _sender,
        address _spender,
        uint256 _value
    )
        public
        onlyProxy
        returns (bool success)
    {
        require(_spender != address(0));
        erc20Store.setAllowance(_sender, _spender, _value);
        erc20Proxy.emitApproval(_sender, _spender, _value);
        return true;
    }
    function increaseApprovalWithSender(
        address _sender,
        address _spender,
        uint256 _addedValue
    )
        public
        onlyProxy
        returns (bool success)
    {
        require(_spender != address(0));
        uint256 currentAllowance = erc20Store.allowed(_sender, _spender);
        uint256 newAllowance = currentAllowance + _addedValue;
        require(newAllowance >= currentAllowance);
        erc20Store.setAllowance(_sender, _spender, newAllowance);
        erc20Proxy.emitApproval(_sender, _spender, newAllowance);
        return true;
    }
    function decreaseApprovalWithSender(
        address _sender,
        address _spender,
        uint256 _subtractedValue
    )
        public
        onlyProxy
        returns (bool success)
    {
        require(_spender != address(0));
        uint256 currentAllowance = erc20Store.allowed(_sender, _spender);
        uint256 newAllowance = currentAllowance - _subtractedValue;
        require(newAllowance <= currentAllowance);
        erc20Store.setAllowance(_sender, _spender, newAllowance);
        erc20Proxy.emitApproval(_sender, _spender, newAllowance);
        return true;
    }
    function requestPrint(address _receiver, uint256 _value) public returns (bytes32 lockId) {
        require(_receiver != address(0));
        lockId = generateLockId();
        pendingPrintMap[lockId] = PendingPrint({
            receiver: _receiver,
            value: _value
        });
        emit PrintingLocked(lockId, _receiver, _value);
    }
    function confirmPrint(bytes32 _lockId) public onlyCustodian {
        PendingPrint storage print = pendingPrintMap[_lockId];
        address receiver = print.receiver;
        require (receiver != address(0));
        uint256 value = print.value;
        delete pendingPrintMap[_lockId];
        uint256 supply = erc20Store.totalSupply();
        uint256 newSupply = supply + value;
        if (newSupply >= supply) {
          erc20Store.setTotalSupply(newSupply);
          erc20Store.addBalance(receiver, value);
          emit PrintingConfirmed(_lockId, receiver, value);
          erc20Proxy.emitTransfer(address(0), receiver, value);
        }
    }
    function burn(uint256 _value) public returns (bool success) {
        uint256 balanceOfSender = erc20Store.balances(msg.sender);
        require(_value <= balanceOfSender);
        erc20Store.setBalance(msg.sender, balanceOfSender - _value);
        erc20Store.setTotalSupply(erc20Store.totalSupply() - _value);
        erc20Proxy.emitTransfer(msg.sender, address(0), _value);
        return true;
    }
    function burnWithSender(address _sender, uint256 _value) public onlyProxy returns (bool success) {
        uint256 balanceOfSender = erc20Store.balances(_sender);
        require(_value <= balanceOfSender);
        erc20Store.setBalance(_sender, balanceOfSender - _value);
        erc20Store.setTotalSupply(erc20Store.totalSupply() - _value);
        erc20Proxy.emitTransfer(_sender, address(0), _value);
        return true;
    }
    function batchTransfer(address[] _tos, uint256[] _values) public returns (bool success) {
        require(_tos.length == _values.length);
        uint256 numTransfers = _tos.length;
        uint256 senderBalance = erc20Store.balances(msg.sender);
        for (uint256 i = 0; i < numTransfers; i++) {
          address to = _tos[i];
          require(to != address(0));
          uint256 v = _values[i];
          require(senderBalance >= v);
          if (msg.sender != to) {
            senderBalance -= v;
            erc20Store.addBalance(to, v);
          }
          erc20Proxy.emitTransfer(msg.sender, to, v);
        }
        erc20Store.setBalance(msg.sender, senderBalance);
        return true;
    }
    function enableSweep(uint8[] _vs, bytes32[] _rs, bytes32[] _ss, address _to) public onlySweeper {
        require(_to != address(0));
        require((_vs.length == _rs.length) && (_vs.length == _ss.length));
        uint256 numSignatures = _vs.length;
        uint256 sweptBalance = 0;
        for (uint256 i=0; i<numSignatures; ++i) {
          address from = ecrecover(sweepMsg, _vs[i], _rs[i], _ss[i]);
          if (from != address(0)) {
            sweptSet[from] = true;
            uint256 fromBalance = erc20Store.balances(from);
            if (fromBalance > 0) {
              sweptBalance += fromBalance;
              erc20Store.setBalance(from, 0);
              erc20Proxy.emitTransfer(from, _to, fromBalance);
            }
          }
        }
        if (sweptBalance > 0) {
          erc20Store.addBalance(_to, sweptBalance);
        }
    }
    function replaySweep(address[] _froms, address _to) public onlySweeper {
        require(_to != address(0));
        uint256 lenFroms = _froms.length;
        uint256 sweptBalance = 0;
        for (uint256 i=0; i<lenFroms; ++i) {
            address from = _froms[i];
            if (sweptSet[from]) {
                uint256 fromBalance = erc20Store.balances(from);
                if (fromBalance > 0) {
                    sweptBalance += fromBalance;
                    erc20Store.setBalance(from, 0);
                    erc20Proxy.emitTransfer(from, _to, fromBalance);
                }
            }
        }
        if (sweptBalance > 0) {
            erc20Store.addBalance(_to, sweptBalance);
        }
    }
    function transferFromWithSender(
        address _sender,
        address _from,
        address _to,
        uint256 _value
    )
        public
        onlyProxy
        returns (bool success)
    {
        require(_to != address(0));
        uint256 balanceOfFrom = erc20Store.balances(_from);
        require(_value <= balanceOfFrom);
        uint256 senderAllowance = erc20Store.allowed(_from, _sender);
        require(_value <= senderAllowance);
        erc20Store.setBalance(_from, balanceOfFrom - _value);
        erc20Store.addBalance(_to, _value);
        erc20Store.setAllowance(_from, _sender, senderAllowance - _value);
        erc20Proxy.emitTransfer(_from, _to, _value);
        return true;
    }
    function transferWithSender(
        address _sender,
        address _to,
        uint256 _value
    )
        public
        onlyProxy
        returns (bool success)
    {
        require(_to != address(0));
        uint256 balanceOfSender = erc20Store.balances(_sender);
        require(_value <= balanceOfSender);
        erc20Store.setBalance(_sender, balanceOfSender - _value);
        erc20Store.addBalance(_to, _value);
        erc20Proxy.emitTransfer(_sender, _to, _value);
        return true;
    }
    function totalSupply() public view returns (uint256) {
        return erc20Store.totalSupply();
    }
    function balanceOf(address _owner) public view returns (uint256 balance) {
        return erc20Store.balances(_owner);
    }
    function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
        return erc20Store.allowed(_owner, _spender);
    }
    event PrintingLocked(bytes32 _lockId, address _receiver, uint256 _value);
    event PrintingConfirmed(bytes32 _lockId, address _receiver, uint256 _value);
}
contract ERC20Store is ERC20ImplUpgradeable {
    uint256 public totalSupply;
    mapping (address => uint256) public balances;
    mapping (address => mapping (address => uint256)) public allowed;
    function ERC20Store(address _custodian) ERC20ImplUpgradeable(_custodian) public {
        totalSupply = 0;
    }
    function setTotalSupply(
        uint256 _newTotalSupply
    )
        public
        onlyImpl
    {
        totalSupply = _newTotalSupply;
    }
    function setAllowance(
        address _owner,
        address _spender,
        uint256 _value
    )
        public
        onlyImpl
    {
        allowed[_owner][_spender] = _value;
    }
    function setBalance(
        address _owner,
        uint256 _newBalance
    )
        public
        onlyImpl
    {
        balances[_owner] = _newBalance;
    }
    function addBalance(
        address _owner,
        uint256 _balanceIncrease
    )
        public
        onlyImpl
    {
        balances[_owner] = balances[_owner] + _balanceIncrease;
    }
}
contract PrintLimiter is LockRequestable {
    struct PendingCeilingRaise {
        uint256 raiseBy;
    }
    ERC20Impl public erc20Impl;
    address public custodian;
    address public limitedPrinter;
    uint256 public totalSupplyCeiling;
    mapping (bytes32 => PendingCeilingRaise) public pendingRaiseMap;
    function PrintLimiter(
        address _erc20Impl,
        address _custodian,
        address _limitedPrinter,
        uint256 _initialCeiling
    )
        public
    {
        erc20Impl = ERC20Impl(_erc20Impl);
        custodian = _custodian;
        limitedPrinter = _limitedPrinter;
        totalSupplyCeiling = _initialCeiling;
    }
    modifier onlyCustodian {
        require(msg.sender == custodian);
        _;
    }
    modifier onlyLimitedPrinter {
        require(msg.sender == limitedPrinter);
        _;
    }
    function limitedPrint(address _receiver, uint256 _value) public onlyLimitedPrinter {
        uint256 totalSupply = erc20Impl.totalSupply();
        uint256 newTotalSupply = totalSupply + _value;
        require(newTotalSupply >= totalSupply);
        require(newTotalSupply <= totalSupplyCeiling);
        erc20Impl.confirmPrint(erc20Impl.requestPrint(_receiver, _value));
    }
    function requestCeilingRaise(uint256 _raiseBy) public returns (bytes32 lockId) {
        require(_raiseBy != 0);
        lockId = generateLockId();
        pendingRaiseMap[lockId] = PendingCeilingRaise({
            raiseBy: _raiseBy
        });
        emit CeilingRaiseLocked(lockId, _raiseBy);
    }
    function confirmCeilingRaise(bytes32 _lockId) public onlyCustodian {
        PendingCeilingRaise storage pendingRaise = pendingRaiseMap[_lockId];
        uint256 raiseBy = pendingRaise.raiseBy;
        require(raiseBy != 0);
        delete pendingRaiseMap[_lockId];
        uint256 newCeiling = totalSupplyCeiling + raiseBy;
        if (newCeiling >= totalSupplyCeiling) {
            totalSupplyCeiling = newCeiling;
            emit CeilingRaiseConfirmed(_lockId, raiseBy, newCeiling);
        }
    }
    function lowerCeiling(uint256 _lowerBy) public onlyLimitedPrinter {
        uint256 newCeiling = totalSupplyCeiling - _lowerBy;
        require(newCeiling <= totalSupplyCeiling);
        totalSupplyCeiling = newCeiling;
        emit CeilingLowered(_lowerBy, newCeiling);
    }
    function confirmPrintProxy(bytes32 _lockId) public onlyCustodian {
        erc20Impl.confirmPrint(_lockId);
    }
    function confirmCustodianChangeProxy(bytes32 _lockId) public onlyCustodian {
        erc20Impl.confirmCustodianChange(_lockId);
    }
    event CeilingRaiseLocked(bytes32 _lockId, uint256 _raiseBy);
    event CeilingRaiseConfirmed(bytes32 _lockId, uint256 _raiseBy, uint256 _newCeiling);
    event CeilingLowered(uint256 _lowerBy, uint256 _newCeiling);
}

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0000000000000000000000000240df8946c2eb0f34ba0e5c9e51b701e55a368e

-----Decoded View---------------
Arg [0] : _custodian (address): 0x0240DF8946C2eb0f34bA0e5C9e51B701e55A368E

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000240df8946c2eb0f34ba0e5c9e51b701e55a368e

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