ETH Price: $2,692.95 (-0.15%)

Contract

0x28cb7e841ee97947a86B06fA4090C8451f64c0be
 
Transaction Hash
Method
Block
From
To
Approve218540602025-02-15 19:59:2336 hrs ago1739649563IN
Yflink: YFL Token
0 ETH0.000030161.24546634
Approve218540602025-02-15 19:59:2336 hrs ago1739649563IN
Yflink: YFL Token
0 ETH0.000030161.24546634
Approve218540422025-02-15 19:55:4736 hrs ago1739649347IN
Yflink: YFL Token
0 ETH0.000032171.32850357
Approve218523162025-02-15 14:07:2342 hrs ago1739628443IN
Yflink: YFL Token
0 ETH0.000038481.58869353
Approve218208372025-02-11 4:16:596 days ago1739247419IN
Yflink: YFL Token
0 ETH0.000038751.6
Approve218072322025-02-09 6:41:238 days ago1739083283IN
Yflink: YFL Token
0 ETH0.000084291.81265763
Approve218043642025-02-08 21:05:238 days ago1739048723IN
Yflink: YFL Token
0 ETH0.000032631.34731038
Approve218043642025-02-08 21:05:238 days ago1739048723IN
Yflink: YFL Token
0 ETH0.000032631.34731038
Approve218042042025-02-08 20:33:118 days ago1739046791IN
Yflink: YFL Token
0 ETH0.000027551.05083232
Approve218041992025-02-08 20:32:118 days ago1739046731IN
Yflink: YFL Token
0 ETH0.0000230.94960661
Approve218016632025-02-08 12:01:478 days ago1739016107IN
Yflink: YFL Token
0 ETH0.000051431.11291094
Approve218007652025-02-08 9:01:238 days ago1739005283IN
Yflink: YFL Token
0 ETH0.000030331.2525745
Approve218007612025-02-08 9:00:358 days ago1739005235IN
Yflink: YFL Token
0 ETH0.000032611.34632597
Approve218007602025-02-08 9:00:238 days ago1739005223IN
Yflink: YFL Token
0 ETH0.000031391.29625699
Approve218006072025-02-08 8:29:358 days ago1739003375IN
Yflink: YFL Token
0 ETH0.000029061.2
Approve218006032025-02-08 8:28:478 days ago1739003327IN
Yflink: YFL Token
0 ETH0.000033911.4
Approve218006012025-02-08 8:28:118 days ago1739003291IN
Yflink: YFL Token
0 ETH0.000033911.4
Approve218005922025-02-08 8:26:238 days ago1739003183IN
Yflink: YFL Token
0 ETH0.000031481.3
Approve218005902025-02-08 8:25:598 days ago1739003159IN
Yflink: YFL Token
0 ETH0.000026641.1
Approve217691852025-02-03 23:12:4713 days ago1738624367IN
Yflink: YFL Token
0 ETH0.000423139.15529415
Approve217545782025-02-01 22:12:5915 days ago1738447979IN
Yflink: YFL Token
0 ETH0.000065982.72422844
Approve217507902025-02-01 9:31:4715 days ago1738402307IN
Yflink: YFL Token
0 ETH0.000174453.7560944
Approve217365452025-01-30 9:45:2317 days ago1738230323IN
Yflink: YFL Token
0 ETH0.000075211.61740769
Transfer217357892025-01-30 7:13:4718 days ago1738221227IN
Yflink: YFL Token
0 ETH0.000055231.85660579
Transfer217354772025-01-30 6:11:2318 days ago1738217483IN
Yflink: YFL Token
0 ETH0.000048691.6372713
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Contract Source Code Verified (Exact Match)

Contract Name:
YFLink

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2020-08-05
*/

/**

Link marines the time has finally come. Presenting YFLink governance token:

#     # ####### #
 #   #  #       #       # #    # #    #     #  ####
  # #   #       #       # ##   # #   #      # #    #
   #    #####   #       # # #  # ####       # #    #
   #    #       #       # #  # # #  #   ### # #    #
   #    #       #       # #   ## #   #  ### # #    #
   #    #       ####### # #    # #    # ### #  ####


######                                            #
#     # #  ####  #####  #        ##   #   #      # #   #####    ##   #####  #####   ##   #####  # #      # ##### #   #
#     # # #      #    # #       #  #   # #      #   #  #    #  #  #  #    #   #    #  #  #    # # #      #   #    # #
#     # #  ####  #    # #      #    #   #      #     # #    # #    # #    #   #   #    # #####  # #      #   #     #
#     # #      # #####  #      ######   #      ####### #    # ###### #####    #   ###### #    # # #      #   #     #
#     # # #    # #      #      #    #   #      #     # #    # #    # #        #   #    # #    # # #      #   #     #
######  #  ####  #      ###### #    #   #      #     # #####  #    # #        #   #    # #####  # ###### #   #     #


This code was forked from Andre Cronje's YFI and modified.
It has not been audited and may contain bugs - be warned.
Similarly as YFI, it has zero initial supply and has zero financial value.
There is no sale of it either, it can only be minted by staking Link.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

*/

pragma solidity ^0.5.16;

interface IERC20 {
    function totalSupply() external view returns (uint);
    function balanceOf(address account) external view returns (uint);
    function transfer(address recipient, uint amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint);
    function approve(address spender, uint amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);
}

contract Context {
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }
}

contract ERC20 is Context, IERC20 {
    using SafeMath for uint;

    mapping (address => uint) private _balances;

    mapping (address => mapping (address => uint)) private _allowances;

    uint private _totalSupply;
    function totalSupply() public view returns (uint) {
        return _totalSupply;
    }
    function balanceOf(address account) public view returns (uint) {
        return _balances[account];
    }
    function transfer(address recipient, uint amount) public returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    function allowance(address owner, address spender) public view returns (uint) {
        return _allowances[owner][spender];
    }
    function approve(address spender, uint amount) public returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    function transferFrom(address sender, address recipient, uint amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }
    function increaseAllowance(address spender, uint addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }
    function decreaseAllowance(address spender, uint subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }
    function _transfer(address sender, address recipient, uint amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }
    function _mint(address account, uint amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }
    function _burn(address account, uint amount) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }
    function _approve(address owner, address spender, uint amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }
}

contract ERC20Detailed is IERC20 {
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }
    function name() public view returns (string memory) {
        return _name;
    }
    function symbol() public view returns (string memory) {
        return _symbol;
    }
    function decimals() public view returns (uint8) {
        return _decimals;
    }
}

library SafeMath {
    function add(uint a, uint b) internal pure returns (uint) {
        uint c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }
    function sub(uint a, uint b) internal pure returns (uint) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
        require(b <= a, errorMessage);
        uint c = a - b;

        return c;
    }
    function mul(uint a, uint b) internal pure returns (uint) {
        if (a == 0) {
            return 0;
        }

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

        return c;
    }
    function div(uint a, uint b) internal pure returns (uint) {
        return div(a, b, "SafeMath: division by zero");
    }
    function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint c = a / b;

        return c;
    }
}

library Address {
    function isContract(address account) internal view returns (bool) {
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != 0x0 && codehash != accountHash);
    }
}

library SafeERC20 {
    using SafeMath for uint;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
        callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    function safeApprove(IERC20 token, address spender, uint value) internal {
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }
    function callOptionalReturn(IERC20 token, bytes memory data) private {
        require(address(token).isContract(), "SafeERC20: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = address(token).call(data);
        require(success, "SafeERC20: low-level call failed");

        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

contract YFLink is ERC20, ERC20Detailed {
    using SafeERC20 for IERC20;
    using Address for address;
    using SafeMath for uint;


    address public governance;
    mapping (address => bool) public minters;

    constructor () public ERC20Detailed("YFLink", "YFL", 18) {
        governance = tx.origin;
    }

    function mint(address account, uint256 amount) public {
        require(minters[msg.sender], "!minter");
        _mint(account, amount);
    }

    function setGovernance(address _governance) public {
        require(msg.sender == governance, "!governance");
        governance = _governance;
    }

    function addMinter(address _minter) public {
        require(msg.sender == governance, "!governance");
        minters[_minter] = true;
    }

    function removeMinter(address _minter) public {
        require(msg.sender == governance, "!governance");
        minters[_minter] = false;
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"constant":false,"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"addMinter","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"governance","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"minters","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_minter","type":"address"}],"name":"removeMinter","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_governance","type":"address"}],"name":"setGovernance","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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Swarm Source

bzzr://538c9892e4f8aaeba2310059d97161cdc686a1c8208cc178b3f92747acb569b5

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

YFLINK is a DeFi powered governance token that enables LINK holders to come together, organize and work towards common objectives.

Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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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.