Address Details
contract

0x4d67E77aD6CBe472A66164EB8959062BC6Ee7EE4

Creator
0x4c828d–78dc3e at 0xc803b4–3a97c5
Balance
0 CELO ( )
Locked CELO Balance
0.00 CELO
Voting CELO Balance
0.00 CELO
Pending Unlocked Gold
0.00 CELO
Tokens
Fetching tokens...
Transactions
20 Transactions
Transfers
0 Transfers
Gas Used
1,292,957
Last Balance Update
11827942
This contract has been verified via Sourcify. View contract in Sourcify repository
Contract name:
UbeswapOrderBook




Optimization enabled
true
Compiler version
v0.8.11+commit.d7f03943




Optimization runs
1000000
EVM Version
london




Verified at
2022-03-06T03:10:22.727186Z

contracts/UbeswapOrderBook.sol

// SPDX-License-Identifier: MIT

pragma solidity 0.8.11;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

import "./OrderBook.sol";

/// @title Public Ubeswap order book
contract UbeswapOrderBook is OrderBook, Ownable {
    using SafeERC20 for IERC20;
    using SafeMath for uint256;

    /// @notice Maximum fee is 10 bps
    uint256 public constant MAX_FEE = 1_000;
    /// @notice Denominator for the fee
    uint256 public constant FEE_DENOMINATOR = 1_000_000;

    /// @notice Fee for broadcasting an order. Always divided by FEE_DENOMINATOR
    uint256 public fee;

    /// @notice Fee recipient
    address public feeRecipient;

    event FeeChanged(uint256 oldFee, uint256 newFee);
    event FeeRecipientChanged(address oldFeeRecipient, address newFeeRecipient);

    constructor(
        LimitOrderProtocol _limitOrderProtocol,
        uint256 _fee,
        address _feeRecipient
    ) OrderBook(_limitOrderProtocol) {
        require(_fee <= MAX_FEE, "UOB: Fee exceeds MAX_FEE");
        fee = _fee;
        feeRecipient = _feeRecipient;
    }

    function changeFee(uint256 _fee) external onlyOwner {
        require(_fee <= MAX_FEE, "UOB: Fee exceeds MAX_FEE");
        emit FeeChanged(fee, _fee);
        fee = _fee;
    }

    function changeFeeRecipient(address _feeRecipient) external onlyOwner {
        emit FeeRecipientChanged(feeRecipient, _feeRecipient);
        feeRecipient = _feeRecipient;
    }

    function broadcastOrder(
        LimitOrderProtocol.Order memory _order,
        bytes calldata _signature
    ) public {
        if (feeRecipient != address(0) && fee > 0) {
            uint256 feeAmount = _order.makingAmount.mul(fee).div(FEE_DENOMINATOR);
            if (feeAmount > 0) {
                IERC20(_order.makerAsset).safeTransferFrom(
                    msg.sender,
                    feeRecipient,
                    feeAmount
                );
            }
        }
        _broadcastOrder(_order, _signature);
    }
}

Contract ABI

[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_limitOrderProtocol","internalType":"contract LimitOrderProtocol"},{"type":"uint256","name":"_fee","internalType":"uint256"},{"type":"address","name":"_feeRecipient","internalType":"address"}]},{"type":"event","name":"FeeChanged","inputs":[{"type":"uint256","name":"oldFee","internalType":"uint256","indexed":false},{"type":"uint256","name":"newFee","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"FeeRecipientChanged","inputs":[{"type":"address","name":"oldFeeRecipient","internalType":"address","indexed":false},{"type":"address","name":"newFeeRecipient","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"OrderBroadcasted","inputs":[{"type":"address","name":"maker","internalType":"address","indexed":true},{"type":"bytes32","name":"orderHash","internalType":"bytes32","indexed":true},{"type":"tuple","name":"order","internalType":"struct OrderMixin.Order","indexed":false,"components":[{"type":"uint256","name":"salt","internalType":"uint256"},{"type":"address","name":"makerAsset","internalType":"address"},{"type":"address","name":"takerAsset","internalType":"address"},{"type":"address","name":"maker","internalType":"address"},{"type":"address","name":"receiver","internalType":"address"},{"type":"address","name":"allowedSender","internalType":"address"},{"type":"uint256","name":"makingAmount","internalType":"uint256"},{"type":"uint256","name":"takingAmount","internalType":"uint256"},{"type":"bytes","name":"makerAssetData","internalType":"bytes"},{"type":"bytes","name":"takerAssetData","internalType":"bytes"},{"type":"bytes","name":"getMakerAmount","internalType":"bytes"},{"type":"bytes","name":"getTakerAmount","internalType":"bytes"},{"type":"bytes","name":"predicate","internalType":"bytes"},{"type":"bytes","name":"permit","internalType":"bytes"},{"type":"bytes","name":"interaction","internalType":"bytes"}]},{"type":"bytes","name":"signature","internalType":"bytes","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"FEE_DENOMINATOR","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"MAX_FEE","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"broadcastOrder","inputs":[{"type":"tuple","name":"_order","internalType":"struct OrderMixin.Order","components":[{"type":"uint256","name":"salt","internalType":"uint256"},{"type":"address","name":"makerAsset","internalType":"address"},{"type":"address","name":"takerAsset","internalType":"address"},{"type":"address","name":"maker","internalType":"address"},{"type":"address","name":"receiver","internalType":"address"},{"type":"address","name":"allowedSender","internalType":"address"},{"type":"uint256","name":"makingAmount","internalType":"uint256"},{"type":"uint256","name":"takingAmount","internalType":"uint256"},{"type":"bytes","name":"makerAssetData","internalType":"bytes"},{"type":"bytes","name":"takerAssetData","internalType":"bytes"},{"type":"bytes","name":"getMakerAmount","internalType":"bytes"},{"type":"bytes","name":"getTakerAmount","internalType":"bytes"},{"type":"bytes","name":"predicate","internalType":"bytes"},{"type":"bytes","name":"permit","internalType":"bytes"},{"type":"bytes","name":"interaction","internalType":"bytes"}]},{"type":"bytes","name":"_signature","internalType":"bytes"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"changeFee","inputs":[{"type":"uint256","name":"_fee","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"changeFeeRecipient","inputs":[{"type":"address","name":"_feeRecipient","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"fee","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"feeRecipient","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract LimitOrderProtocol"}],"name":"limitOrderProtocol","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]}]

Contract Creation Code

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