Contract 0x0000000000095413afC295d19EDeb1Ad7B71c952 8

 
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Value
0xce33bf2c8152e592859cb3362f830ab0ff5f274c4e8e14482a415918eeade20fTransfer(pending)2021-12-15 5:21:1616 mins ago0xc99e10d7667ab4fa533338706493903ae89a467c IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x8e142febc09a16056498848a37bf37cbf806d72c1388ddff25ef42d95ac4e8baApprove(pending)2021-12-15 5:10:3226 mins ago0x965eeafaa56d275f13afac7bf7aa8bfe1fb1505a IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x7c123c7db7502cb50a47f5e08d384100d777d2190406ef01b439d2f310f10a06Approve(pending)2021-12-15 5:10:3226 mins ago0x965eeafaa56d275f13afac7bf7aa8bfe1fb1505a IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x68a02224321158bd4ff32f0970c110d39d09527b0677016265106e000789e8f4Approve(pending)2021-12-15 5:10:3226 mins ago0x965eeafaa56d275f13afac7bf7aa8bfe1fb1505a IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x5e81d070dded196386c0ab8859d1fbb21784ff7d45b289e0de2fa23f4a2ea448Approve(pending)2021-12-15 5:10:3226 mins ago0x965eeafaa56d275f13afac7bf7aa8bfe1fb1505a IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x4393f5cadde9c554e8fa44a7161bcdb260e80dee57f369dea5212ef23fc405c5Approve(pending)2021-12-15 5:10:3226 mins ago0x965eeafaa56d275f13afac7bf7aa8bfe1fb1505a IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xbceb1e291d311edf1c8b3fcfe8b8f443554c1bcce2541e53c71fb36120c5eaeaApprove(pending)2021-12-15 5:01:5335 mins ago0x965eeafaa56d275f13afac7bf7aa8bfe1fb1505a IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x3f67f1d59c7c0338b09b7081e46af1e94499a2f5b94e0bcb3d3194b40b744c1cApprove(pending)2021-12-15 4:51:5845 mins ago0x965eeafaa56d275f13afac7bf7aa8bfe1fb1505a IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x9e69fa7fa045244ea71726e2b60484bbde6bdd7d946dfe21b95cf9566abafc4aTransfer(pending)2021-12-15 4:39:0458 mins ago0xa22d053e30e4f9ad6cde1f5225eb12234f813d5c IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x39e2442c838ce0beed6f84739922c3980b39ca7fd0a11c36abfd74b7c3b59e3aTransfer(pending)2021-12-14 16:18:3113 hrs 19 mins ago0x1d1efff6ff2e92a17dcb8c05d4d5325b47990a53 IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x4250a4edd02c1e8bdc81da806ac626605acb047ade74beaeb34b37ed7c586f62Transfer(pending)2021-12-14 13:54:0915 hrs 43 mins ago0x95408ed3278b379b5f25f60eb7782fc03db29f2d IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xd56130ad89339b07994ba869e74d758492f1a506f2956f8d6f0dceb47b040290Transfer(pending)2021-12-13 15:34:111 day 14 hrs ago0x06bb6d6a33b434cb1c1c917aa6a08b5d7874f731 IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xc968ca641b07a94761a1994266baa0d6c04bac2d770ae1b2ce1ea55bcc2e62ffTransfer(pending)2021-12-13 4:52:102 days 45 mins ago0xa86d9d90963728a79b5dbc0b344fe6eac64f6d60 IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xa5bf833d90367a007bf2f19ac9ba1ee3808a34dde6170db134427b574ced0ce3Transfer(pending)2021-12-12 23:54:042 days 5 hrs ago0xa9710aa89141412c2f7b4d25ddfb4383f87f3a41 IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xc84c058c26ff96b7ab1ad62388ce9b875767bbfdcf3c01b3a6458b2a0c4359f9Transfer(pending)2021-12-12 14:42:142 days 14 hrs ago0x211830aa8fd193d7e452e2235c6f25a6d360bbd1 IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x7e99b7caa2d44847ed173ff3a24d4953b1d63e30cb768c9d4586d3c125edc14aApprove(pending)2021-12-12 14:01:502 days 15 hrs ago0xb3b590249d03964497252415aa5629d83f53522f IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x3b0109842c8fa156226c06eb3dd06461c7f578d3c337dbfc9e9800b9d79e0c04Transfer(pending)2021-12-12 9:44:452 days 19 hrs ago0x394552fd15202f340790d8cfd19f4e2bb38f0aec IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x3b31ecfa16d998490a9083843447d584f81ff3626e3d7bbe2937cc1eb891d262Approve(pending)2021-12-12 7:44:342 days 21 hrs ago0x0392e5f80eb00555690bda1bc812375cf86d5eca IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xcbbf8319aa607ae34d5a78a6ebf61754407a516f4efd6468b64c111ddc7836bfApprove(pending)2021-12-12 6:28:052 days 23 hrs ago0x88da9fe47173497ba158b84830552e66adba6829 IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xf34f99c4418c2a3dd495e9b1927c1aea62ab9b686bda9cabbfb22f52fb1b3313Approve(pending)2021-12-12 6:28:052 days 23 hrs ago0x88da9fe47173497ba158b84830552e66adba6829 IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xe4cc7b4564a486b5dbdb6db1e7d6a424c82dd2cff04736c7fd6fe6bba7971dceTransfer(pending)2021-12-12 6:22:472 days 23 hrs ago0x6a28bef4587fb844276cf691d64f92718195f986 IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x4ed491bc94539fc4fa60d86d52efb2e90138ff9a8edad166cc6df84b5eceea8cTransfer(pending)2021-12-12 4:48:433 days 48 mins ago0xc128ad99fd71a03f315f421914907d583a0df1cf IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0xd0397e1cf96fb6cf8963e7f02de9f61cc1a6a32ed5e5943414fb6fd72af9c963Approve(pending)2021-12-12 3:59:183 days 1 hr ago0x18b8f13e4dd7561a7da95d8b53894f8d5e698d5e IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x636024087bbf66ebde786e366ac10699b644606d4991d34e4257978ed36bd258Approve(pending)2021-12-12 3:47:053 days 1 hr ago0x7648a2e868babaa25f53c3aa41bd757995617f5a IN Tokenlon: LON Token0 Ether(Pending)(Pending)
0x844627e7c25502a91ad57f7aaaa23a9099f1858f8db9e6b3b7695dc8e4c2742fTransfer(pending)2021-12-12 3:21:323 days 2 hrs ago0xb56bb0ff485fd068d66cd459101dc07e38959345 IN Tokenlon: LON Token0 Ether(Pending)(Pending)

OVERVIEW

Tokenlon is a decentralized exchange and payment settlement protocol.

Latest 1 internal transaction
Parent Txn Hash Block From To Value
0x51d5118c0c1d973f735644e52cdeb17074694bb01ecfd1ced104c3a421427838114943892020-12-21 3:58:20359 days 1 hr ago 0x4e59b44847b379578588920ca78fbf26c0b4956c  Contract Creation0 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
Lon

Compiler Version
v0.7.4+commit.3f05b770

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, MIT license
File 1 of 10 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

File 2 of 10 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @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.
     */
    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.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        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.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

File 3 of 10 : ERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

import "../../GSN/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = 18;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        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);
    }

    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal {
        _decimals = decimals_;
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}

File 4 of 10 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 5 of 10 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.7.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 6 of 10 : Lon.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";

import "../interfaces/ILon.sol";
import "./Ownable.sol";

contract Lon is ERC20, ILon, Ownable {
  using SafeMath for uint256;

  uint256 public override constant cap = 200_000_000e18; // CAP is 200,000,000 LON

  bytes32 public override immutable DOMAIN_SEPARATOR;

  // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)")
  bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;

  address public emergencyRecipient;

  address public minter;

  mapping(address => uint256) public override nonces;

  constructor(address _owner, address _emergencyRecipient) ERC20("Tokenlon", "LON") Ownable(_owner) {
    minter = _owner;
    emergencyRecipient = _emergencyRecipient;

    uint256 chainId ;
    assembly {
       chainId := chainid()
    }
    DOMAIN_SEPARATOR =  keccak256(
            abi.encode(
                keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                keccak256(bytes(name())),
                keccak256(bytes("1")),
                chainId,
                address(this)
            )
        );
  }

  modifier onlyMinter {
    require(msg.sender == minter, "not minter");
    _;
  }

  // implement the eip-2612
  function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external override {
    require(owner != address(0), "zero address");
    require(block.timestamp <= deadline || deadline == 0, "permit is expired");

    bytes32 digest = keccak256(
      abi.encodePacked(
        uint16(0x1901),
        DOMAIN_SEPARATOR,
        keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
        )
      );

    require(owner == ecrecover(digest, v, r, s), "invalid signature");
    _approve(owner, spender, value);
  }

  function burn(uint256 amount) external override {
     _burn(msg.sender, amount);
  }

  function emergencyWithdraw(IERC20 token) external override {
    token.transfer(emergencyRecipient, token.balanceOf(address(this)));
  }

  function setMinter(address newMinter) external onlyOwner {
    emit MinterChanged(minter, newMinter);
    minter = newMinter;
  }

  function mint(address to, uint256 amount) external override onlyMinter {
    require(to != address(0), "zero address");
    require(totalSupply().add(amount) <= cap, "cap exceeded");

     _mint(to, amount);
  }

  event MinterChanged(address minter, address newMinter);

}

File 7 of 10 : Ownable.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;

abstract contract Ownable {
    address public owner;
    address public nominatedOwner;

    constructor(address _owner) {
        owner = _owner;
    }

    function acceptOwnership() external {
        require(msg.sender == nominatedOwner, "not nominated");
        emit OwnerChanged(owner, nominatedOwner);

        owner = nominatedOwner;
        nominatedOwner = address(0);
    }

    function renounceOwnership() external onlyOwner {
        emit OwnerChanged(owner, address(0));
        owner = address(0);
    }

    function nominateNewOwner(address newOwner) external onlyOwner {
        nominatedOwner = newOwner;
        emit OwnerNominated(newOwner);
    }

    modifier onlyOwner {
        require(msg.sender == owner, "not owner");
        _;
    }

    event OwnerNominated(address indexed newOwner);
    event OwnerChanged(address indexed oldOwner, address indexed newOwner);
}

File 8 of 10 : IEIP2612.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IEIP2612 is IERC20 {
  function DOMAIN_SEPARATOR() external view returns (bytes32);
  function nonces(address owner) external view returns (uint256);
  function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
}

File 9 of 10 : IEmergency.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IEmergency {
    function emergencyWithdraw(IERC20 token) external ;
}

File 10 of 10 : ILon.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;

import "./IEmergency.sol";
import "./IEIP2612.sol";

interface ILon is IEmergency, IEIP2612 {
  function cap() external view returns(uint256);

  function mint(address to, uint256 amount) external; 

  function burn(uint256 amount) external;
}

Settings
{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

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

0000000000000000000000003b1b761ec28b63227a1e7204a80622180dccc22f00000000000000000000000000000000d49a1772a9ed1533f0d6b7f54a4a814e

-----Decoded View---------------
Arg [0] : _owner (address): 0x3b1b761ec28b63227a1e7204a80622180dccc22f
Arg [1] : _emergencyRecipient (address): 0x00000000d49a1772a9ed1533f0d6b7f54a4a814e

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000003b1b761ec28b63227a1e7204a80622180dccc22f
Arg [1] : 00000000000000000000000000000000d49a1772a9ed1533f0d6b7f54a4a814e


Block Transaction Difficulty Gas Used Reward
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.