Contract 0x21be370d5312f44cb42ce377bc9b8a0cef1a4c83 1

Txn Hash
Block
From
To
Value [Txn Fee]
0x67d26f29f133d336c54063de55c313fdd210579299ac5bd91c9d7f77d45bea41135516792021-08-02 6:17:2617 secs ago0x453c40bd6d3169f526b33c78e081f53538063b02 IN  Fantom Finance: Wrapped Fantom Token4,129.28412291202 FTM0.00272466348
0xe56d5ae9fdef3862d712725c92b9018d4ddf42c4d3e491a34bc50293c4deb5dc135515392021-08-02 6:14:522 mins ago0x453c40bd6d3169f526b33c78e081f53538063b02 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.00246203056
0x46fe0580218fb5295445a79fc0ad22f1dc3d4679cc940c8a1401953df3eddf91135515132021-08-02 6:14:113 mins ago0x453c40bd6d3169f526b33c78e081f53538063b02 IN  Fantom Finance: Wrapped Fantom Token1,020.08165126309 FTM0.00192606348
0x58a80eb92f5edff635900ca2a79dfc6687af3ec0005f9c5feb708840210a1679135511292021-08-02 6:07:1810 mins ago0x368d2265a6849b198a1c59e2f79b63845d79a267 IN  Fantom Finance: Wrapped Fantom Token33 FTM0.00271401548
0xa7a2b081377a8eb9ed497efe1c1b3b9a13d9365768144d746d5d575cafa26ca5135510982021-08-02 6:06:3911 mins ago0x368d2265a6849b198a1c59e2f79b63845d79a267 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.00251436548
0x7c563f5e30595f7dbc920ee6a48723a2406c61a0d6e462416c155743acde1a07135495052021-08-02 5:36:1341 mins ago0x0000000000eb6999da9c60ac3034974be1311bf3 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.00160275
0xc40551acdacf171d79993c3043d8ff0909da97f4ae7a7cbbd8de88546881d33b135494702021-08-02 5:35:3142 mins ago0x0000000000409627331280d77901f7d3f6eba0d1 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.0034102
0x66de04dc86219636421d5dbac7b88f43bd4cbe5502f118921ead9f979f24e610135491002021-08-02 5:28:4548 mins ago0x863888f25d243ec3eb9048eeb1fe7e1267fa13dc IN  Fantom Finance: Wrapped Fantom Token0 FTM0.00243344068
0x2537f6a0ab3df8da97dd97fe330ba0f456078422643c6a990785df05d9bc532f135481252021-08-02 5:11:421 hr 6 mins ago0xb2f18beebf5fc1305ff025d751f6d2e6f818f552 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.0014783
0x4917b649e8cd7729069144c83ef25cdceebb40a82ae6152a0bbc3b97e5aa65d9135476452021-08-02 5:03:151 hr 14 mins ago0x9c8d10f132229e54269e2b34f6963e1d7030e1a7 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.002824992
0x5ac51ac3d24a4b990650b8be659ef8242ae1d5f62ce93d99003897c0798c03eb135474942021-08-02 5:00:321 hr 17 mins ago0x4a5c218cf4fb73f0c28d7a0b913a73876da21eb9 IN  Fantom Finance: Wrapped Fantom Token69.170482658094448 FTM0.00308407
0x1ea8340f810bcc4f6d0dd08d08a1ce950734c5694f4eb077fd5fda4e9b57656d135472542021-08-02 4:55:441 hr 21 mins ago0x5c3e53e7f837ec8b7ef64a4c85fceb823b64b12b IN  Fantom Finance: Wrapped Fantom Token0 FTM0.0014783
0x09da31d881e208b670def25c20178b6558868ba96d73b2b719a5c2e0c61174dd135470302021-08-02 4:51:011 hr 26 mins ago0x9c8d10f132229e54269e2b34f6963e1d7030e1a7 IN  Fantom Finance: Wrapped Fantom Token800 FTM0.0031197924
0x04ec47b2c4349d7d332901a7ff50f166c803b7b95e3e33656c71f06d237495e4135465952021-08-02 4:42:321 hr 35 mins ago0x29d0fb7aa20feb28ea9ac03d424b9317fad03077 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.0024976
0xcbc4dc62cbdf5cac9a07345560fba3637e72ade80c9a2cca54a9cb6347c84f7d135462682021-08-02 4:36:201 hr 41 mins ago0xaee7e9bb015e1543c8ab3226a9d9615971c4c060 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.002914428
0x905ab5752d18fe1734cb19339cbf9906d430d28db613d3f09e5e4cf11f971840135462472021-08-02 4:36:001 hr 41 mins ago0x0000000000eb6999da9c60ac3034974be1311bf3 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.00160275
0xd7300fea028e4d6237e3756b8e03677f5947bff295bc75ed947203781e0a1dd0135462112021-08-02 4:35:181 hr 42 mins ago0x0000000000409627331280d77901f7d3f6eba0d1 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.0040852
0x8231160112071bcd2811c394259f0b5b2cf5385f30ed1e77fff5ae2f52c4e6c0135461272021-08-02 4:33:401 hr 44 mins ago0x7360e97d481e1bce6e93a4cceeac8c28c2ac75f2 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.003016662
0x1394d333724df374d1b0343ff3b7d19e34194b024fa6d40ea576019e4ac047e9135448792021-08-02 4:09:412 hrs 8 mins ago0x151f6285d5f64e491ee5f2c059b1c0e15b12d4e0 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.001707609112
0x1453acd7e9bd8e993b4e1cf51dd5d788462a1b6b60db34a9d570c88cd113b5d3135446812021-08-02 4:06:262 hrs 11 mins ago0x90e8f692a6ceb20fb8df11709f29f051052b141e IN  Fantom Finance: Wrapped Fantom Token0 FTM0.001720727448
0x9cfd6407ebeeee1d747da970665ed7b57136e2e3965a247689c6305b0eb4c384135442702021-08-02 3:58:592 hrs 18 mins ago0x5bfaad4a04ab0fab6d206c9ea1144da886d31f9a IN  Fantom Finance: Wrapped Fantom Token0 FTM0.002706125312
0x8dc36e31cb12e9ca936a14fa5d15b6e2f61eb6885a8c7b4e58c6f6aca44e1152135441392021-08-02 3:56:462 hrs 20 mins ago0x5bfaad4a04ab0fab6d206c9ea1144da886d31f9a IN  Fantom Finance: Wrapped Fantom Token500 FTM0.002985417028
0x923aaab3751e5d102fc30d05f896f1403806d8aab71408cc522c37aa32cd9824135440532021-08-02 3:55:152 hrs 22 mins ago0xeb93f70a395ac430e94a0733645a8cc41f91c5b8 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.002676784748
0xbe3cf24baad826a716cda3347de037084c8a2ba348b15487dd0c4367be4ab185135439612021-08-02 3:53:392 hrs 24 mins ago0x60eab18f4926de63292e312736f04037ea454f02 IN  Fantom Finance: Wrapped Fantom Token0 FTM0.002676784748
0x79a0d4b2010cf3b4a84ac5b502eebce32f75d68b6db86596e3e8915c8205279d135438882021-08-02 3:52:232 hrs 25 mins ago0x60eab18f4926de63292e312736f04037ea454f02 IN  Fantom Finance: Wrapped Fantom Token1 FTM0.005672274784
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x68441e1274846ab9d1772f2f29579c0ddaad6dbaaf9fe801b5a4208f4cd719e3135516892021-08-02 6:17:376 secs ago SpiritSwap: Router Fantom Finance: Wrapped Fantom Token7.123139308755250122 FTM
0x031726383364611c41d7b1680b8abe524978b3bc8092da29178a86ef47d0bcc3135516852021-08-02 6:17:3013 secs ago SpiritSwap: Router Fantom Finance: Wrapped Fantom Token3.208238794569426054 FTM
0x67d26f29f133d336c54063de55c313fdd210579299ac5bd91c9d7f77d45bea41135516792021-08-02 6:17:2617 secs ago 0x453c40bd6d3169f526b33c78e081f53538063b02 Fantom Finance: Wrapped Fantom Token4,129.28412291202 FTM
0xa3271051047c6bae60af0d983952a9c2b3b2ee5035d6001f48a7c6f63d33be31135516732021-08-02 6:17:2023 secs ago Fantom Finance: Wrapped Fantom Token SpiritSwap: Router16.698627581145748299 FTM
0x1a0e8705c709c4ca15442b3a95f3446344ebe6231287863d2a272a6ab7947d05135516082021-08-02 6:16:131 min ago Fantom Finance: Wrapped Fantom Token SpookySwap: Router0.455414416149980266 FTM
0x473ec393ec276ba76493fbfea379c69c55b4563de0ae1fe288665414a638b4d3135515932021-08-02 6:15:571 min ago Fantom Finance: Wrapped Fantom Token PaintSwap: Router0.031632473541074996 FTM
0xa7261ce5a84cc52b96608367990cf3f47575db82ee985a286b4e1ccd7af856e3135515912021-08-02 6:15:551 min ago Fantom Finance: Wrapped Fantom Token SpookySwap: Router0.000008495994651434 FTM
0xa7261ce5a84cc52b96608367990cf3f47575db82ee985a286b4e1ccd7af856e3135515912021-08-02 6:15:551 min ago SpookySwap: Router Fantom Finance: Wrapped Fantom Token46.982992138534426895 FTM
0xa7261ce5a84cc52b96608367990cf3f47575db82ee985a286b4e1ccd7af856e3135515912021-08-02 6:15:551 min ago Fantom Finance: Wrapped Fantom Token SpookySwap: Router46.982992138534426895 FTM
0xc83d006a2e2d58a44ae50b236cf979e090b2e8ab9d3fa32498ffff60b733f00b135515852021-08-02 6:15:481 min ago SpiritSwap: Router Fantom Finance: Wrapped Fantom Token8.2520285124012037 FTM
0x9a18a676cdaf7ba5680fbdafd1be85ea92170476a0e6bc2626ecadf9ce3f8b76135515632021-08-02 6:15:232 mins ago Fantom Finance: Wrapped Fantom Token SpookySwap: Router0.009603841144983806 FTM
0xa3a77f21a01bc64b3b6e849ef346697db42dfd933b32cf611cecff8328b90ebb135515612021-08-02 6:15:222 mins ago Fantom Finance: Wrapped Fantom Token SpookySwap: Router367.508626139048456615 FTM
0x2536522954730782e85da47c00eba7493ac1a0961b42467a768ed1d1cd0a4868135515592021-08-02 6:15:202 mins ago Fantom Finance: Wrapped Fantom Token SpiritSwap: Router10.280903488991742161 FTM
0xde1ea9acfaadce5a1c82d5f7e140ccd02796e9137763213ad1a3f562f12b448e135515562021-08-02 6:15:172 mins ago SpookySwap: Router Fantom Finance: Wrapped Fantom Token12.475171313664417498 FTM
0x8604a08872702df6b70e684b1b2def3c5961798c666508444aaa3507c263d5af135515522021-08-02 6:15:112 mins ago 0x4d2cf285a519261f30b4d9c2c344baf260d65fa2 Fantom Finance: Wrapped Fantom Token842.9 FTM
0xeaa6e3287b5563857dfd757e135ab0ee5128d45605378493c1afed6afab86149135515432021-08-02 6:15:002 mins ago SpookySwap: Router Fantom Finance: Wrapped Fantom Token12.5 FTM
0xa7bf66634dbf1064c989f81a445d1f4e71b7db5517269042cc464a87d44dfe84135515422021-08-02 6:14:582 mins ago 0x40b12a3e261416ff0035586ff96e23c2894560f2 Fantom Finance: Wrapped Fantom Token23 FTM
0x3a4577c102ae4d6a20cfe07f4a7998f77f585a548ee055729a6f63a91654f6d8135515282021-08-02 6:14:273 mins ago Fantom Finance: Wrapped Fantom Token SpookySwap: Router8.215607039396307527 FTM
0xe4abb404fe22c280f2efdede45817a08d899b5b7fbfaa835cb3ca1ac7248672e135515222021-08-02 6:14:223 mins ago SpiritSwap: Router Fantom Finance: Wrapped Fantom Token1 FTM
0x09d208d781ff465fd94f1c99467789b79867b1d8e5898f2a5ac841e5e973b941135515172021-08-02 6:14:163 mins ago SpookySwap: Router Fantom Finance: Wrapped Fantom Token99.627177869295394903 FTM
0x46fe0580218fb5295445a79fc0ad22f1dc3d4679cc940c8a1401953df3eddf91135515132021-08-02 6:14:113 mins ago 0x453c40bd6d3169f526b33c78e081f53538063b02 Fantom Finance: Wrapped Fantom Token1,020.08165126309 FTM
0x96665b0f55a53d174e662560938a3a54282336024f35d93895eae22150549b47135515032021-08-02 6:14:033 mins ago Fantom Finance: Wrapped Fantom Token SpiritSwap: Router15.592856755322519468 FTM
0x39c9a9f4ee61abf794160a46aba6d18c463642949c0d917f56e252174cba43d5135515022021-08-02 6:14:033 mins ago SpiritSwap: Router Fantom Finance: Wrapped Fantom Token1 FTM
0x0c661d8bda41d3c262f77d2acd7633fd76dca1ac2f56101ffa81b9dc115119c4135514922021-08-02 6:13:533 mins ago SpiritSwap: Router Fantom Finance: Wrapped Fantom Token2.799944684787138066 FTM
0xa200e21ac22335a14e419500511422218ff32f70d3bfe437ea495723ae9d86da135514902021-08-02 6:13:513 mins ago 0xb6deb303e0bc7164dbfa66c0460935bf6f9aaaf6 Fantom Finance: Wrapped Fantom Token10 FTM
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Contract Source Code Verified (Exact Match)

Contract Name:
WrappedFtm

Compiler Version
v0.5.17+commit.d19bba13

Optimization Enabled:
Yes with 5000000 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at FtmScan.com on 2021-02-19
*/

pragma solidity ^0.5.0;

contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

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

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

library Roles {
    struct Role {
        mapping (address => bool) bearer;
    }

    /**
     * @dev Give an account access to this role.
     */
    function add(Role storage role, address account) internal {
        require(!has(role, account), "Roles: account already has role");
        role.bearer[account] = true;
    }

    /**
     * @dev Remove an account's access to this role.
     */
    function remove(Role storage role, address account) internal {
        require(has(role, account), "Roles: account does not have role");
        role.bearer[account] = false;
    }

    /**
     * @dev Check if an account has this role.
     * @return bool
     */
    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0), "Roles: account is the zero address");
        return role.bearer[account];
    }
}

contract PauserRole is Context {
    using Roles for Roles.Role;

    event PauserAdded(address indexed account);
    event PauserRemoved(address indexed account);

    Roles.Role private _pausers;

    constructor () internal {
        _addPauser(_msgSender());
    }

    modifier onlyPauser() {
        require(isPauser(_msgSender()), "PauserRole: caller does not have the Pauser role");
        _;
    }

    function isPauser(address account) public view returns (bool) {
        return _pausers.has(account);
    }

    function addPauser(address account) public onlyPauser {
        _addPauser(account);
    }

    function renouncePauser() public {
        _removePauser(_msgSender());
    }

    function _addPauser(address account) internal {
        _pausers.add(account);
        emit PauserAdded(account);
    }

    function _removePauser(address account) internal {
        _pausers.remove(account);
        emit PauserRemoved(account);
    }
}

contract Pausable is Context, PauserRole {
    /**
     * @dev Emitted when the pause is triggered by a pauser (`account`).
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by a pauser (`account`).
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state. Assigns the Pauser role
     * to the deployer.
     */
    constructor () internal {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     */
    modifier whenNotPaused() {
        require(!_paused, "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     */
    modifier whenPaused() {
        require(_paused, "Pausable: not paused");
        _;
    }

    /**
     * @dev Called by a pauser to pause, triggers stopped state.
     */
    function pause() public onlyPauser whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Called by a pauser to unpause, returns to normal state.
     */
    function unpause() public onlyPauser whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

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;
    }
}

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);
}

contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

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

    uint256 private _totalSupply;

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

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view 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 returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

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

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public 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 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 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 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 {
        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);
    }

    /** @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 {
        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);
    }

    /**
     * @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 {
        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);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is 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 {
        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 Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }
}

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

    /**
     * @dev Sets the values for `name`, `symbol`, and `decimals`. All three of
     * these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name, string memory symbol, uint8 decimals) public {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

    /**
     * @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.
     *
     * 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;
    }
}

contract ERC20Pausable is ERC20, Pausable {
    function transfer(address to, uint256 value) public whenNotPaused returns (bool) {
        return super.transfer(to, value);
    }

    function transferFrom(address from, address to, uint256 value) public whenNotPaused returns (bool) {
        return super.transferFrom(from, to, value);
    }

    function approve(address spender, uint256 value) public whenNotPaused returns (bool) {
        return super.approve(spender, value);
    }

    function increaseAllowance(address spender, uint256 addedValue) public whenNotPaused returns (bool) {
        return super.increaseAllowance(spender, addedValue);
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public whenNotPaused returns (bool) {
        return super.decreaseAllowance(spender, subtractedValue);
    }
}

contract WrappedFtm is ERC20, ERC20Detailed, ERC20Pausable {
    // Error Code: No error.
    uint256 public constant ERR_NO_ERROR = 0x0;

    // Error Code: Non-zero value expected to perform the function.
    uint256 public constant ERR_INVALID_ZERO_VALUE = 0x01;

    // create instance of the wFTM token
    constructor () public ERC20Detailed("Wrapped Fantom", "WFTM", 18) {
    }

    // deposit wraps received FTM tokens as wFTM in 1:1 ratio by minting
    // the received amount of FTMs in wFTM on the sender's address.
    function deposit() public whenNotPaused payable returns (uint256) {
        // there has to be some value to be converted
        if (msg.value == 0) {
            return ERR_INVALID_ZERO_VALUE;
        }

        // we already received FTMs, mint the appropriate amount of wFTM
        _mint(msg.sender, msg.value);

        // all went well here
        return ERR_NO_ERROR;
    }

    // withdraw unwraps FTM tokens by burning specified amount
    // of wFTM from the caller address and sending the same amount
    // of FTMs back in exchange.
    function withdraw(uint256 amount) public whenNotPaused returns (uint256) {
        // there has to be some value to be converted
        if (amount == 0) {
            return ERR_INVALID_ZERO_VALUE;
        }

        // burn wFTM from the sender first to prevent re-entrance issue
        _burn(msg.sender, amount);

        // if wFTM were burned, transfer native tokens back to the sender
        msg.sender.transfer(amount);

        // all went well here
        return ERR_NO_ERROR;
    }
}

Contract ABI

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Swarm Source

bzzr://5aa4bd727a32addbd7562837838048136c5d3570e72e58054c8b7b09443fe6ca
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Validator ID :
0 FTM

Amount Staked
0

Amount Delegated
0

Staking Total
0

Staking Start Epoch
0

Staking Start Time
0

Proof of Importance
0

Origination Score
0

Validation Score
0

Active
0

Online
0

Downtime
0 s
Address Amount claimed Rewards Created On Epoch Created On
Block Uncle Number Difficulty Gas Used Reward
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