ETH Price: $1,802.83 (-0.44%)
Gas: 16 Gwei

Contract

0xfD53b1B4AF84D59B20bF2C20CA89a6BeeAa2c628
 

Overview

ETH Balance

0 ETH

Eth Value

$0.00

Token Holdings

Multi Chain

Multichain Addresses

6 addresses found via Blockscan
Transaction Hash
Method
Block
From
To
Value
Lock Token149729452022-06-16 11:00:18279 days 1 hr agoIN
Harmony: BUSD Bridge
0 ETH0.0022863536.59859352
Lock Token148940182022-06-03 0:15:10292 days 12 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0034537955.2757441
Lock Token148756902022-05-31 0:36:52295 days 12 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.001261220.18864239
Lock Token148546002022-05-27 14:14:18298 days 22 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0031636150.64138581
Lock Token148515582022-05-27 2:28:37299 days 10 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0027761944.43967395
Lock Token148465862022-05-26 6:56:56300 days 5 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0019222930.77690724
Lock Token148395242022-05-25 3:23:54301 days 9 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0011601318.57080122
Lock Token148054212022-05-19 14:18:55306 days 22 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0016261528.20877424
Lock Token147945942022-05-17 20:19:03308 days 16 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0020780933.27767521
Lock Token147699102022-05-13 21:55:33312 days 14 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0026896943.06342483
Lock Token147682692022-05-13 15:50:13312 days 20 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0059418295.11337551
Lock Token147676532022-05-13 13:30:46312 days 23 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0039950363.96257032
Lock Token147676012022-05-13 13:19:42312 days 23 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0059175394.76085891
Lock Token147654512022-05-13 5:15:18313 days 7 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0042616673.89612616
Lock Token147631612022-05-12 20:29:53313 days 16 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.00779092124.73662413
Lock Token147605212022-05-12 10:20:58314 days 2 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.01040945180.49713353
Lock Token147461992022-05-10 3:12:31316 days 9 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0044645871.48022838
Lock Token147444732022-05-09 20:29:28316 days 16 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0045808773.32795509
Lock Token147085982022-05-04 3:32:04322 days 9 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0028344345.37194608
Lock Token147085472022-05-04 3:20:28322 days 9 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0031118649.83214285
Lock Token146966632022-05-02 6:12:57324 days 6 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0028236845.20868212
Lock Token146961792022-05-02 4:24:29324 days 8 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0029322346.93747356
Lock Token146923702022-05-01 13:59:53324 days 22 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0026359239.19071788
Lock Token146863042022-04-30 15:07:37325 days 21 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0039025862.48230297
Lock Token146765962022-04-29 2:34:54327 days 10 hrs agoIN
Harmony: BUSD Bridge
0 ETH0.0032667452.29218755
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Contract Source Code Verified (Exact Match)

Contract Name:
BUSDEthManager

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license
/**
 *Submitted for verification at Etherscan.io on 2022-01-25
*/

// File: contracts/busd/IBUSD.sol

pragma solidity 0.5.17;

interface IBUSD {
    function balanceOf(address _addr) external returns (uint256);
    function transferFrom(address _from, address _to, uint256 _value) external returns (bool);
    function transfer(address _to, uint256 _value) external returns (bool);
    function increaseSupply(uint256 _value) external returns (bool success);
    function decreaseSupply(uint256 _value) external returns (bool success);
}

// File: @openzeppelin/contracts/math/SafeMath.sol

pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: contracts/busd/BUSDEthManager.sol

pragma solidity 0.5.17;



contract BUSDEthManager {
    using SafeMath for uint256;

    IBUSD public busd_;

    mapping(bytes32 => bool) public usedEvents_;

    event Locked(
        address indexed token,
        address indexed sender,
        uint256 amount,
        address recipient
    );

    event Unlocked(
        address ethToken,
        uint256 amount,
        address recipient,
        bytes32 receiptId
    );

    address public wallet;
    modifier onlyWallet {
        require(msg.sender == wallet, "HmyManager/not-authorized");
        _;
    }

    /**
     * @dev constructor
     * @param busd token contract address, e.g., erc20 contract
     * @param _wallet is the multisig wallet
     */
    constructor(IBUSD busd, address _wallet) public {
        busd_ = busd;
        wallet = _wallet;
    }

    /**
     * @dev lock tokens to be minted on harmony chain
     * @param amount amount of tokens to lock
     * @param recipient recipient address on the harmony chain
     */
    function lockToken(uint256 amount, address recipient) public {
        require(
            recipient != address(0),
            "EthManager/recipient is a zero address"
        );
        require(amount > 0, "EthManager/zero token locked");
        uint256 _balanceBefore = busd_.balanceOf(msg.sender);
        require(
            busd_.transferFrom(msg.sender, address(this), amount),
            "EthManager/lock failed"
        );
        uint256 _balanceAfter = busd_.balanceOf(msg.sender);
        uint256 _actualAmount = _balanceBefore.sub(_balanceAfter);
        emit Locked(address(busd_), msg.sender, _actualAmount, recipient);
    }

    /**
     * @dev lock tokens for an user address to be minted on harmony chain
     * @param amount amount of tokens to lock
     * @param recipient recipient address on the harmony chain
     */
    function lockTokenFor(
        address userAddr,
        uint256 amount,
        address recipient
    ) public onlyWallet {
        require(
            recipient != address(0),
            "EthManager/recipient is a zero address"
        );
        require(amount > 0, "EthManager/zero token locked");
        uint256 _balanceBefore = busd_.balanceOf(userAddr);
        require(
            busd_.transferFrom(userAddr, address(this), amount),
            "EthManager/lock failed"
        );
        uint256 _balanceAfter = busd_.balanceOf(userAddr);
        uint256 _actualAmount = _balanceBefore.sub(_balanceAfter);
        emit Locked(address(busd_), userAddr, _actualAmount, recipient);
    }

    /**
     * @dev unlock tokens after burning them on harmony chain
     * @param amount amount of unlock tokens
     * @param recipient recipient of the unlock tokens
     * @param receiptId transaction hash of the burn event on harmony chain
     */
    function unlockToken(
        uint256 amount,
        address recipient,
        bytes32 receiptId
    ) public onlyWallet {
        require(
            !usedEvents_[receiptId],
            "EthManager/The burn event cannot be reused"
        );
        usedEvents_[receiptId] = true;
        require(busd_.transfer(recipient, amount), "EthManager/unlock failed");
        emit Unlocked(address(busd_), amount, recipient, receiptId);
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract IBUSD","name":"busd","type":"address"},{"internalType":"address","name":"_wallet","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"recipient","type":"address"}],"name":"Locked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"ethToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"bytes32","name":"receiptId","type":"bytes32"}],"name":"Unlocked","type":"event"},{"constant":true,"inputs":[],"name":"busd_","outputs":[{"internalType":"contract IBUSD","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"name":"lockToken","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"userAddr","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"name":"lockTokenFor","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"bytes32","name":"receiptId","type":"bytes32"}],"name":"unlockToken","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"usedEvents_","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"wallet","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000004fabb145d64652a948d72533023f6e7a623c7c53000000000000000000000000715cdda5e9ad30a0ced14940f9997ee611496de6

-----Decoded View---------------
Arg [0] : busd (address): 0x4Fabb145d64652a948d72533023f6E7A623C7C53
Arg [1] : _wallet (address): 0x715CdDa5e9Ad30A0cEd14940F9997EE611496De6

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000004fabb145d64652a948d72533023f6e7a623c7c53
Arg [1] : 000000000000000000000000715cdda5e9ad30a0ced14940f9997ee611496de6


Deployed ByteCode Sourcemap

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Swarm Source

bzzr://e430232cf4b59c88d6c457c149ee2b330909c2e7d7ce2a45958d873e6f154dbe

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.