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pragma solidity ^0.5.16;
pragma experimental ABIEncoderV2;

import "./GovernorBravoInterfaces.sol";

contract GovernorBravoDelegator is GovernorBravoDelegatorStorage, GovernorBravoEvents {
	constructor(
			address timelock_,
			address ring_,
			address admin_,
	        address implementation_,
	        uint votingPeriod_,
	        uint votingDelay_,
            uint proposalThreshold_) public {

        // Admin set to msg.sender for initialization
        admin = msg.sender;

        delegateTo(implementation_, abi.encodeWithSignature("initialize(address,address,uint256,uint256,uint256)",
                                                            timelock_,
                                                            ring_,
                                                            votingPeriod_,
                                                            votingDelay_,
                                                            proposalThreshold_));

        _setImplementation(implementation_);

		admin = admin_;
	}


	/**
     * @notice Called by the admin to update the implementation of the delegator
     * @param implementation_ The address of the new implementation for delegation
     */
    function _setImplementation(address implementation_) public {
        require(msg.sender == admin, "GovernorBravoDelegator::_setImplementation: admin only");
        require(implementation_ != address(0), "GovernorBravoDelegator::_setImplementation: invalid implementation address");

        address oldImplementation = implementation;
        implementation = implementation_;

        emit NewImplementation(oldImplementation, implementation);
    }

    /**
     * @notice Internal method to delegate execution to another contract
     * @dev It returns to the external caller whatever the implementation returns or forwards reverts
     * @param callee The contract to delegatecall
     * @param data The raw data to delegatecall
     */
    function delegateTo(address callee, bytes memory data) internal {
        (bool success, bytes memory returnData) = callee.delegatecall(data);
        assembly {
            if eq(success, 0) {
                revert(add(returnData, 0x20), returndatasize)
            }
        }
    }

	/**
     * @dev Delegates execution to an implementation contract.
     * It returns to the external caller whatever the implementation returns
     * or forwards reverts.
     */
    function () external payable {
        // delegate all other functions to current implementation
        (bool success, ) = implementation.delegatecall(msg.data);

        assembly {
              let free_mem_ptr := mload(0x40)
              returndatacopy(free_mem_ptr, 0, returndatasize)

              switch success
              case 0 { revert(free_mem_ptr, returndatasize) }
              default { return(free_mem_ptr, returndatasize) }
        }
    }
}

pragma solidity ^0.5.16;
pragma experimental ABIEncoderV2;


contract GovernorBravoEvents {
    /// @notice An event emitted when a new proposal is created
    event ProposalCreated(uint id, address proposer, address[] targets, uint[] values, string[] signatures, bytes[] calldatas, uint startBlock, uint endBlock, string description);

    /// @notice An event emitted when a vote has been cast on a proposal
    /// @param voter The address which casted a vote
    /// @param proposalId The proposal id which was voted on
    /// @param support Support value for the vote. 0=against, 1=for, 2=abstain
    /// @param votes Number of votes which were cast by the voter
    /// @param reason The reason given for the vote by the voter
    event VoteCast(address indexed voter, uint proposalId, uint8 support, uint votes, string reason);

    /// @notice An event emitted when a proposal has been canceled
    event ProposalCanceled(uint id);

    /// @notice An event emitted when a proposal has been queued in the Timelock
    event ProposalQueued(uint id, uint eta);

    /// @notice An event emitted when a proposal has been executed in the Timelock
    event ProposalExecuted(uint id);

    /// @notice An event emitted when the voting delay is set
    event VotingDelaySet(uint oldVotingDelay, uint newVotingDelay);

    /// @notice An event emitted when the voting period is set
    event VotingPeriodSet(uint oldVotingPeriod, uint newVotingPeriod);

    /// @notice Emitted when implementation is changed
    event NewImplementation(address oldImplementation, address newImplementation);

    /// @notice Emitted when proposal threshold is set
    event ProposalThresholdSet(uint oldProposalThreshold, uint newProposalThreshold);

    /// @notice Emitted when pendingAdmin is changed
    event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);

    /// @notice Emitted when pendingAdmin is accepted, which means admin is updated
    event NewAdmin(address oldAdmin, address newAdmin);
}

contract GovernorBravoDelegatorStorage {
    /// @notice Administrator for this contract
    address public admin;

    /// @notice Pending administrator for this contract
    address public pendingAdmin;

    /// @notice Active brains of Governor
    address public implementation;
}


/**
 * @title Storage for Governor Bravo Delegate
 * @notice For future upgrades, do not change GovernorBravoDelegateStorageV1. Create a new
 * contract which implements GovernorBravoDelegateStorageV1 and following the naming convention
 * GovernorBravoDelegateStorageVX.
 */
contract GovernorBravoDelegateStorageV1 is GovernorBravoDelegatorStorage {

    /// @notice The delay before voting on a proposal may take place, once proposed, in blocks
    uint public votingDelay;

    /// @notice The duration of voting on a proposal, in blocks
    uint public votingPeriod;

    /// @notice The number of votes required in order for a voter to become a proposer
    uint public proposalThreshold;

    /// @notice Initial proposal id set at become
    uint public initialProposalId;

    /// @notice The total number of proposals
    uint public proposalCount;

    /// @notice The address of the Ring Protocol Timelock
    TimelockInterface public timelock;

    /// @notice The address of the Ring governance token
    RingInterface public ring;

    /// @notice The official record of all proposals ever proposed
    mapping (uint => Proposal) public proposals;

    /// @notice The latest proposal for each proposer
    mapping (address => uint) public latestProposalIds;


    struct Proposal {
        /// @notice Unique id for looking up a proposal
        uint id;

        /// @notice Creator of the proposal
        address proposer;

        /// @notice The timestamp that the proposal will be available for execution, set once the vote succeeds
        uint eta;

        /// @notice the ordered list of target addresses for calls to be made
        address[] targets;

        /// @notice The ordered list of values (i.e. msg.value) to be passed to the calls to be made
        uint[] values;

        /// @notice The ordered list of function signatures to be called
        string[] signatures;

        /// @notice The ordered list of calldata to be passed to each call
        bytes[] calldatas;

        /// @notice The block at which voting begins: holders must delegate their votes prior to this block
        uint startBlock;

        /// @notice The block at which voting ends: votes must be cast prior to this block
        uint endBlock;

        /// @notice Current number of votes in favor of this proposal
        uint forVotes;

        /// @notice Current number of votes in opposition to this proposal
        uint againstVotes;

        /// @notice Current number of votes for abstaining for this proposal
        uint abstainVotes;

        /// @notice Flag marking whether the proposal has been canceled
        bool canceled;

        /// @notice Flag marking whether the proposal has been executed
        bool executed;

        /// @notice Receipts of ballots for the entire set of voters
        mapping (address => Receipt) receipts;
    }

    /// @notice Ballot receipt record for a voter
    struct Receipt {
        /// @notice Whether or not a vote has been cast
        bool hasVoted;

        /// @notice Whether or not the voter supports the proposal or abstains
        uint8 support;

        /// @notice The number of votes the voter had, which were cast
        uint96 votes;
    }

    /// @notice Possible states that a proposal may be in
    enum ProposalState {
        Pending,
        Active,
        Canceled,
        Defeated,
        Succeeded,
        Queued,
        Expired,
        Executed
    }
}

interface TimelockInterface {
    function delay() external view returns (uint);
    function GRACE_PERIOD() external view returns (uint);
    function acceptAdmin() external;
    function queuedTransactions(bytes32 hash) external view returns (bool);
    function queueTransaction(address target, uint value, string calldata signature, bytes calldata data, uint eta) external returns (bytes32);
    function cancelTransaction(address target, uint value, string calldata signature, bytes calldata data, uint eta) external;
    function executeTransaction(address target, uint value, string calldata signature, bytes calldata data, uint eta) external payable returns (bytes memory);
}

interface RingInterface {
    function getPriorVotes(address account, uint blockNumber) external view returns (uint96);
}

interface GovernorAlpha {
    /// @notice The total number of proposals
    function proposalCount() external returns (uint);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "evmVersion": "istanbul",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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