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YFLink (YFL) ($3.98)

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To
Approve240008932025-12-13 3:05:4728 hrs ago1765595147IN
Yflink: YFL Token
0 ETH0.000006030.12981671
Approve239568612025-12-06 22:41:117 days ago1765060871IN
Yflink: YFL Token
0 ETH0.000004180.09
Approve239372322025-12-04 3:18:3510 days ago1764818315IN
Yflink: YFL Token
0 ETH0.000049272.03415775
Approve239163752025-12-01 4:52:5913 days ago1764564779IN
Yflink: YFL Token
0 ETH0.000006450.13879424
Approve239123592025-11-30 15:25:2313 days ago1764516323IN
Yflink: YFL Token
0 ETH0.000001760.03828688
Approve238969092025-11-28 11:34:5915 days ago1764329699IN
Yflink: YFL Token
0 ETH0.000025521.05391229
Approve238061372025-11-15 17:40:2328 days ago1763228423IN
Yflink: YFL Token
0 ETH0.000044750.96834665
Approve237923742025-11-13 19:29:2330 days ago1763062163IN
Yflink: YFL Token
0 ETH0.000079733.29194245
Approve237264122025-11-04 14:00:2339 days ago1762264823IN
Yflink: YFL Token
0 ETH0.000073283.02553291
Approve237186192025-11-03 11:51:4740 days ago1762170707IN
Yflink: YFL Token
0 ETH0.000106482.3052543
Approve237179412025-11-03 9:35:4740 days ago1762162547IN
Yflink: YFL Token
0 ETH0.000024491.01129937
Approve237159182025-11-03 2:48:4741 days ago1762138127IN
Yflink: YFL Token
0 ETH0.00000330.12610906
Approve237159182025-11-03 2:48:4741 days ago1762138127IN
Yflink: YFL Token
0 ETH0.000003330.12721898
Approve237159042025-11-03 2:45:5941 days ago1762137959IN
Yflink: YFL Token
0 ETH0.000003260.13475025
Approve237159042025-11-03 2:45:5941 days ago1762137959IN
Yflink: YFL Token
0 ETH0.000003260.13475025
Approve236988932025-10-31 17:42:1143 days ago1761932531IN
Yflink: YFL Token
0 ETH0.000012660.52296474
Approve236988922025-10-31 17:41:5943 days ago1761932519IN
Yflink: YFL Token
0 ETH0.000012830.52992004
Approve236340032025-10-22 15:38:3552 days ago1761147515IN
Yflink: YFL Token
0 ETH0.000032480.7039228
Approve236248322025-10-21 8:44:4753 days ago1761036287IN
Yflink: YFL Token
0 ETH0.000019080.78783422
Approve236248302025-10-21 8:44:2353 days ago1761036263IN
Yflink: YFL Token
0 ETH0.000018250.7536607
Approve236248292025-10-21 8:44:1153 days ago1761036251IN
Yflink: YFL Token
0 ETH0.000017770.73391894
Approve235630122025-10-12 17:03:2362 days ago1760288603IN
Yflink: YFL Token
0 ETH0.000215244.63434437
Approve235447872025-10-10 3:56:3565 days ago1760068595IN
Yflink: YFL Token
0 ETH0.000080591.74386528
Approve235011192025-10-04 1:25:1171 days ago1759541111IN
Yflink: YFL Token
0 ETH0.000027631.14086759
Transfer234860892025-10-01 23:01:1173 days ago1759359671IN
Yflink: YFL Token
0 ETH0.000013180.28140291
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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
/**
 *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

API
[{"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 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.

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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.