Contract 0x1E4F97b9f9F913c46F1632781732927B9019C68b 6

Txn Hash Method
Block
From
To
Value [Txn Fee]
0x373e1ec3cf8a98d1992050d9660a6ab475f75360bd3f1bb672cb7272af34d934Approve384799012022-05-18 1:36:492 hrs 35 mins ago0x7802642131ccb84219b5ab2897052ee9cedbc895 IN  Curve.fi: CRV Token0 FTM0.012662645354
0x216895ce114b0ffd6f2330c77aabf1ded2b15fc35dccb0e2e8520addb1c792ffApprove384699432022-05-17 22:22:285 hrs 50 mins ago0x02d9cd8f4b86421bfef64deaac6afe246eefaa0b IN  Curve.fi: CRV Token0 FTM0.013051791152
0x7e77440d2ce8ae61f928f25856a9f0169b133e4b5ab1626a031df60cbd084e17Swapout384686322022-05-17 21:58:566 hrs 13 mins ago0xed9ca75f828747fe3da57f05b89665df6b1b54fe IN  Curve.fi: CRV Token0 FTM0.010699434774
0xca210594bbbc5d97dc68759c5fe118eb09e54dd7593cecda5a66da9a17ea625dApprove384676132022-05-17 21:38:426 hrs 33 mins ago0xb94eb5a8f69d80a0a8aa90226f406d99ec62cf84 IN  Curve.fi: CRV Token0 FTM0.014217893682
0x78ba241f9061b91e70368ada847adbfad4f782430a1511b49bd61f5d016fc6a8Approve384662932022-05-17 21:14:206 hrs 58 mins ago0x911362b7c5ab388df79c21b4a290468724cf0901 IN  Curve.fi: CRV Token0 FTM0.014120287623
0xa72b7743db577a15f7b46c3e55f5bdacde6492ede374bb1ad2e9aad96ea76edcApprove384662912022-05-17 21:14:186 hrs 58 mins ago0x911362b7c5ab388df79c21b4a290468724cf0901 IN  Curve.fi: CRV Token0 FTM0.018690599481
0x94114f7167b87c8b54f8c1e6f22bf38dceecf7afbfa63dba28083bedd0e35c32Transfer384649192022-05-17 20:45:577 hrs 26 mins ago0x23e817b3982ba0e033dab4fa1b47088418ad6b2a IN  Curve.fi: CRV Token0 FTM0.015583945288
0xbe0e59ccc748233718eb92837e74caca7755d4388d6766386abe8b4abb52bb17Transfer384648422022-05-17 20:44:387 hrs 28 mins ago0x5ffbd6a712064b92e111336d1a6979b5065a54be IN  Curve.fi: CRV Token0 FTM0.018043538026
0x4e602c8e7ceda0d7978839aa45a09ba88ef10c3f89378fcdcefbd0a0cd1ad38dSwapout384629312022-05-17 20:07:518 hrs 4 mins ago0x5538793f0ed24fd4ea2fcd5225a40995a8f5ac3a IN  Curve.fi: CRV Token0 FTM0.021342782907
0x840c1559f97148460b8d440dba5107ba16c5570eefabf5adf9ea26654379f9a6Swapout384606472022-05-17 19:21:268 hrs 51 mins ago0xf96da4775776ea43c42795b116c7a6eccd6e71b5 IN  Curve.fi: CRV Token0 FTM0.023568330465
0x5d449027c5b8b34ae26b38543f7fb83ff112db02c1cd1a198bf798e0fc6bbc6aApprove384602702022-05-17 19:12:269 hrs ago0xcc9ee37684c29a5d71d66946772d30ea297fe7cc IN  Curve.fi: CRV Token0 FTM0.035416773479
0x71413f7f7fa17546ea7d51368a7c2a2b9ea952c85cf4c25effd14e21f1a022eeApprove384566912022-05-17 17:47:3110 hrs 25 mins ago0x130e6d1a52b4577b3779f7cf50295d3b28e6a593 IN  Curve.fi: CRV Token0 FTM0.02771054186
0x0afdf0b466fd55e03c8a3b3a4a6185def7cc4fa448f2c0865332e241436e8a55Approve384563072022-05-17 17:38:4810 hrs 33 mins ago0x5d8a9b0b8a8aace7ddb6a631d2f2f4e00c49925a IN  Curve.fi: CRV Token0 FTM0.141418617749
0xc4b8354a772303b331132f7fad039a0225224126660dd1b240fb8b19a26ed8eeSwapout384561702022-05-17 17:34:4710 hrs 37 mins ago0x8e26f746a53795a601540a68badab71aa3f72bbf IN  Curve.fi: CRV Token0 FTM0.020897515365
0x44248d90817c8ab634bc6d861ddc710290845913bcf0b09462172e813e5ebfe5Approve384559952022-05-17 17:29:3610 hrs 43 mins ago0xc7e0defdca7641b2512b13d1f9866db1de60229a IN  Curve.fi: CRV Token0 FTM0.01786958652
0xdb67f1c688fd66010bf0d7de537030aa49e930b5a9ec1177830af6c99e9a5729Approve384559882022-05-17 17:29:2710 hrs 43 mins ago0xc7e0defdca7641b2512b13d1f9866db1de60229a IN  Curve.fi: CRV Token0 FTM0.030059040987
0x14daff989210d42340f240100da66338db72f6ed6e1c011425c98eaad38f7364Approve384556712022-05-17 17:19:4610 hrs 52 mins ago0x540743fe1e3a40f25c6c2229bc6c045d30a6a009 IN  Curve.fi: CRV Token0 FTM0.027544146183
0x2b81380d85f7370cc828a7fa965acd5087552feb38181eb296f8f84fb4b5834fApprove384550662022-05-17 17:01:0111 hrs 11 mins ago0x0e7c91444722b932cb96ef4fa52dc57719a0511f IN  Curve.fi: CRV Token0 FTM0.024841809689
0x3786c497bcd240771236590065e7f5d79031baa61db1c845dcb598ab14a68b8fApprove384539762022-05-17 16:33:5011 hrs 38 mins ago0xdb4312ec778071778007d1fa7bfdb53094ea802a IN  Curve.fi: CRV Token0 FTM0.02294961385
0x8438d8acd155068e4965d72c3434bd61f221bb8eab99c0ecaebc46f744d91697Approve384534372022-05-17 16:24:1211 hrs 48 mins ago0xaf1d950e93c2b25d8633b21b8eddcfc9caf11d76 IN  Curve.fi: CRV Token0 FTM0.025781721607
0x937af1841f9782c849e5a0d6df6b1c17e1664830f359801c264bea541db00094Approve384525992022-05-17 16:08:3812 hrs 4 mins ago0x5c10afd2e8c8ae7e282aea60759209f32edfe3d8 IN  Curve.fi: CRV Token0 FTM0.027764247861
0x6ff44b8cd35ff117f48a6b28818eadab6ffa3c9bbdb6773c4229908ac60abb40Approve384519992022-05-17 15:56:4212 hrs 15 mins ago0x7727dba040af7e3c3927c74603d26565509ad694 IN  Curve.fi: CRV Token0 FTM0.025090323256
0xd7dce8d677caaae5f24f020b9bc1f8453570f63e8fa610152b3b0d43a30ff8b5Approve384511692022-05-17 15:40:0812 hrs 32 mins ago0x54d5570fb96890b99288d46332fd7d49954dbb89 IN  Curve.fi: CRV Token0 FTM0.024618269135
0x4c1ca4d12e60df7857e6a703aca4ed62fb9aa868eda42f2e3e2175038fcfb59dApprove384509702022-05-17 15:36:1912 hrs 36 mins ago0xbd6cbfadb8b3e5f8139aab7a900c316fe8f4d558 IN  Curve.fi: CRV Token0 FTM0.025723308605
0xa415b854a60bb8104ad7d26ae683acfdd0b47eb9dc142f6fc35780c5cc5e490cApprove384505932022-05-17 15:28:4412 hrs 43 mins ago0xe2e6d73fd99139586cece840057d77c72cb69b30 IN  Curve.fi: CRV Token0 FTM0.022977151934
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OVERVIEW

Curve is an exchange liquidity pool on Ethereum (like Uniswap) designed for (1) extremely efficient stablecoin trading (2) low risk, supplemental fee income for liquidity providers, without an opportunity cost.

Latest 4 internal transactions
Parent Txn Hash Block From To Value
0x3910e05b305de466714897661bb8da5a48b5a0a03f1f7fc27705807a90780863300822512022-02-05 14:40:13101 days 13 hrs ago 0x67fe06d4d98419ac84ad5a1fd9bea03571101996 Curve.fi: CRV Token154.52427 FTM
0x439b63180a808b279cc6a5cab6e5d0280f2b9ab834b09778fd9242a903413117288170432022-01-23 12:06:14114 days 16 hrs ago 0x4362bd219a89e6e8f5cda73b1482cbb0021c762d Curve.fi: CRV Token43.071502396 FTM
0xa1d64d847f201a0863b1de20f9fe05bb626faa9198865c1c8c56959cbfc934cb288166152022-01-23 11:59:05114 days 16 hrs ago 0x4362bd219a89e6e8f5cda73b1482cbb0021c762d Curve.fi: CRV Token43.461 FTM
0x4e37cae004759c31f6c7b7e6f5dc943b1956369145f7c22dda3a3cb10003837323011382021-02-19 18:30:12452 days 9 hrs ago Fantom: Deployer  Contract Creation0 FTM
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Contract Source Code Verified (Exact Match)

Contract Name:
CurveDAO

Compiler Version
v0.8.1+commit.df193b15

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

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

// SPDX-License-Identifier: GPL-3.0-or-later

pragma solidity 0.8.1;

/**
 * @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);
}

/**
 * @dev Interface of the ERC2612 standard as defined in the EIP.
 *
 * Adds the {permit} method, which can be used to change one's
 * {IERC20-allowance} without having to send a transaction, by signing a
 * message. This allows users to spend tokens without having to hold Ether.
 *
 * See https://eips.ethereum.org/EIPS/eip-2612.
 */
interface IERC2612 {
    /**
     * @dev Sets `amount` as the allowance of `spender` over `owner`'s tokens,
     * given `owner`'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;

    /**
     * @dev Returns the current ERC2612 nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);
}

/// @dev Wrapped ERC-20 v10 (WERC10) is an ERC-20 ERC-20 wrapper. You can `deposit` ERC-20 and obtain an WERC10 balance which can then be operated as an ERC-20 token. You can
/// `withdraw` ERC-20 from WERC10, which will then burn WERC10 token in your wallet. The amount of WERC10 token in any wallet is always identical to the
/// balance of ERC-20 deposited minus the ERC-20 withdrawn with that specific wallet.
interface IWERC10 is IERC20, IERC2612 {

    /// @dev Sets `value` as allowance of `spender` account over caller account's WERC10 token,
    /// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
    /// Emits {Approval} event.
    /// Returns boolean value indicating whether operation succeeded.
    /// For more information on approveAndCall format, see https://github.com/ethereum/EIPs/issues/677.
    function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);

    /// @dev Moves `value` WERC10 token from caller's account to account (`to`), 
    /// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
    /// A transfer to `address(0)` triggers an ERC-20 withdraw matching the sent WERC10 token in favor of caller.
    /// Emits {Transfer} event.
    /// Returns boolean value indicating whether operation succeeded.
    /// Requirements:
    ///   - caller account must have at least `value` WERC10 token.
    /// For more information on transferAndCall format, see https://github.com/ethereum/EIPs/issues/677.
    function transferAndCall(address to, uint value, bytes calldata data) external returns (bool);
}

interface ITransferReceiver {
    function onTokenTransfer(address, uint, bytes calldata) external returns (bool);
}

interface IApprovalReceiver {
    function onTokenApproval(address, uint, bytes calldata) external returns (bool);
}

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 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");
        }
    }
}

/// @dev Wrapped Ether v10 (WERC10) is an Ether (ETH) ERC-20 wrapper. You can `deposit` ETH and obtain an WERC10 balance which can then be operated as an ERC-20 token. You can
/// `withdraw` ETH from WERC10, which will then burn WERC10 token in your wallet. The amount of WERC10 token in any wallet is always identical to the
/// balance of ETH deposited minus the ETH withdrawn with that specific wallet.
contract CurveDAO is IWERC10 {
    using SafeERC20 for IERC20;
    string public name;
    string public symbol;
    uint8  public immutable decimals;

    bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant TRANSFER_TYPEHASH = keccak256("Transfer(address owner,address to,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public immutable DOMAIN_SEPARATOR;

    /// @dev Records amount of WERC10 token owned by account.
    mapping (address => uint256) public override balanceOf;
    uint256 private _totalSupply;
    
    address private _oldOwner;
    address private _newOwner;
    uint256 private _newOwnerEffectiveTime;
    
    
    modifier onlyOwner() {
        require(msg.sender == owner(), "only owner");
        _;
    }
    
    function owner() public view returns (address) {
        if (block.timestamp >= _newOwnerEffectiveTime) {
            return _newOwner;
        }
        return _oldOwner;
    }
    
    
    function changeDCRMOwner(address newOwner) public onlyOwner returns (bool) {
        require(newOwner != address(0), "new owner is the zero address");
        _oldOwner = owner();
        _newOwner = newOwner;
        _newOwnerEffectiveTime = block.timestamp + 2*24*3600;
        emit LogChangeDCRMOwner(_oldOwner, _newOwner, _newOwnerEffectiveTime);
        return true;
    }

    function Swapin(bytes32 txhash, address account, uint256 amount) public onlyOwner returns (bool) {
        _mint(account, amount);
        emit LogSwapin(txhash, account, amount);
        return true;
    }

    function Swapout(uint256 amount, address bindaddr) public returns (bool) {
        require(bindaddr != address(0), "bind address is the zero address");
        _burn(msg.sender, amount);
        emit LogSwapout(msg.sender, bindaddr, amount);
        return true;
    }

    /// @dev Records current ERC2612 nonce for account. This value must be included whenever signature is generated for {permit}.
    /// Every successful call to {permit} increases account's nonce by one. This prevents signature from being used multiple times.
    mapping (address => uint256) public override nonces;

    /// @dev Records number of WERC10 token that account (second) will be allowed to spend on behalf of another account (first) through {transferFrom}.
    mapping (address => mapping (address => uint256)) public override allowance;
    
    event LogChangeDCRMOwner(address indexed oldOwner, address indexed newOwner, uint indexed effectiveTime);
    event LogSwapin(bytes32 indexed txhash, address indexed account, uint amount);
    event LogSwapout(address indexed account, address indexed bindaddr, uint amount);
    
    constructor(string memory _name, string memory _symbol, uint8 _decimals, address _owner) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
        
        _newOwner = _owner;
        _newOwnerEffectiveTime = block.timestamp;
        
        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)));
    }
    
    /// @dev Returns the total supply of WERC10 token as the ETH held in this contract.
    function totalSupply() external view override returns (uint256) {
        return _totalSupply;
    }
    
    /** @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 += amount;
        balanceOf[account] += 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");

        balanceOf[account] -= amount;
        _totalSupply -= amount;
        emit Transfer(account, address(0), amount);
    }
    
    /// @dev Sets `value` as allowance of `spender` account over caller account's WERC10 token.
    /// Emits {Approval} event.
    /// Returns boolean value indicating whether operation succeeded.
    function approve(address spender, uint256 value) external override returns (bool) {
        // _approve(msg.sender, spender, value);
        allowance[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);

        return true;
    }

    /// @dev Sets `value` as allowance of `spender` account over caller account's WERC10 token,
    /// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
    /// Emits {Approval} event.
    /// Returns boolean value indicating whether operation succeeded.
    /// For more information on approveAndCall format, see https://github.com/ethereum/EIPs/issues/677.
    function approveAndCall(address spender, uint256 value, bytes calldata data) external override returns (bool) {
        // _approve(msg.sender, spender, value);
        allowance[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        
        return IApprovalReceiver(spender).onTokenApproval(msg.sender, value, data);
    }

    /// @dev Sets `value` as allowance of `spender` account over `owner` account's WERC10 token, given `owner` account's signed approval.
    /// Emits {Approval} event.
    /// Requirements:
    ///   - `deadline` must be timestamp in future.
    ///   - `v`, `r` and `s` must be valid `secp256k1` signature from `owner` account over EIP712-formatted function arguments.
    ///   - the signature must use `owner` account's current nonce (see {nonces}).
    ///   - the signer cannot be zero address and must be `owner` account.
    /// For more information on signature format, see https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP section].
    /// WERC10 token implementation adapted from https://github.com/albertocuestacanada/ERC20Permit/blob/master/contracts/ERC20Permit.sol.
    function permit(address target, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external override {
        require(block.timestamp <= deadline, "WERC10: Expired permit");

        bytes32 hashStruct = keccak256(
            abi.encode(
                PERMIT_TYPEHASH,
                target,
                spender,
                value,
                nonces[target]++,
                deadline));

        require(verifyEIP712(target, hashStruct, v, r, s) || verifyPersonalSign(target, hashStruct, v, r, s));

        // _approve(owner, spender, value);
        allowance[target][spender] = value;
        emit Approval(target, spender, value);
    }

    function transferWithPermit(address target, address to, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external returns (bool) {
        require(block.timestamp <= deadline, "WERC10: Expired permit");

        bytes32 hashStruct = keccak256(
            abi.encode(
                TRANSFER_TYPEHASH,
                target,
                to,
                value,
                nonces[target]++,
                deadline));

        require(verifyEIP712(target, hashStruct, v, r, s) || verifyPersonalSign(target, hashStruct, v, r, s));

        require(to != address(0) || to != address(this));
        
        uint256 balance = balanceOf[target];
        require(balance >= value, "WERC10: transfer amount exceeds balance");

        balanceOf[target] = balance - value;
        balanceOf[to] += value;
        emit Transfer(target, to, value);
        
        return true;
    }
    
    function verifyEIP712(address target, bytes32 hashStruct, uint8 v, bytes32 r, bytes32 s) internal view returns (bool) {
        bytes32 hash = keccak256(
            abi.encodePacked(
                "\x19\x01",
                DOMAIN_SEPARATOR,
                hashStruct));
        address signer = ecrecover(hash, v, r, s);
        return (signer != address(0) && signer == target);
    }
    
    function verifyPersonalSign(address target, bytes32 hashStruct, uint8 v, bytes32 r, bytes32 s) internal pure returns (bool) {
        bytes32 hash = prefixed(hashStruct);
        address signer = ecrecover(hash, v, r, s);
        return (signer != address(0) && signer == target);
    }
    
    // Builds a prefixed hash to mimic the behavior of eth_sign.
    function prefixed(bytes32 hash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /// @dev Moves `value` WERC10 token from caller's account to account (`to`).
    /// A transfer to `address(0)` triggers an ETH withdraw matching the sent WERC10 token in favor of caller.
    /// Emits {Transfer} event.
    /// Returns boolean value indicating whether operation succeeded.
    /// Requirements:
    ///   - caller account must have at least `value` WERC10 token.
    function transfer(address to, uint256 value) external override returns (bool) {
        require(to != address(0) || to != address(this));
        uint256 balance = balanceOf[msg.sender];
        require(balance >= value, "WERC10: transfer amount exceeds balance");

        balanceOf[msg.sender] = balance - value;
        balanceOf[to] += value;
        emit Transfer(msg.sender, to, value);
        
        return true;
    }

    /// @dev Moves `value` WERC10 token from account (`from`) to account (`to`) using allowance mechanism.
    /// `value` is then deducted from caller account's allowance, unless set to `type(uint256).max`.
    /// A transfer to `address(0)` triggers an ETH withdraw matching the sent WERC10 token in favor of caller.
    /// Emits {Approval} event to reflect reduced allowance `value` for caller account to spend from account (`from`),
    /// unless allowance is set to `type(uint256).max`
    /// Emits {Transfer} event.
    /// Returns boolean value indicating whether operation succeeded.
    /// Requirements:
    ///   - `from` account must have at least `value` balance of WERC10 token.
    ///   - `from` account must have approved caller to spend at least `value` of WERC10 token, unless `from` and caller are the same account.
    function transferFrom(address from, address to, uint256 value) external override returns (bool) {
        require(to != address(0) || to != address(this));
        if (from != msg.sender) {
            // _decreaseAllowance(from, msg.sender, value);
            uint256 allowed = allowance[from][msg.sender];
            if (allowed != type(uint256).max) {
                require(allowed >= value, "WERC10: request exceeds allowance");
                uint256 reduced = allowed - value;
                allowance[from][msg.sender] = reduced;
                emit Approval(from, msg.sender, reduced);
            }
        }
        
        uint256 balance = balanceOf[from];
        require(balance >= value, "WERC10: transfer amount exceeds balance");

        balanceOf[from] = balance - value;
        balanceOf[to] += value;
        emit Transfer(from, to, value);
        
        return true;
    }

    /// @dev Moves `value` WERC10 token from caller's account to account (`to`), 
    /// after which a call is executed to an ERC677-compliant contract with the `data` parameter.
    /// A transfer to `address(0)` triggers an ETH withdraw matching the sent WERC10 token in favor of caller.
    /// Emits {Transfer} event.
    /// Returns boolean value indicating whether operation succeeded.
    /// Requirements:
    ///   - caller account must have at least `value` WERC10 token.
    /// For more information on transferAndCall format, see https://github.com/ethereum/EIPs/issues/677.
    function transferAndCall(address to, uint value, bytes calldata data) external override returns (bool) {
        require(to != address(0) || to != address(this));
        
        uint256 balance = balanceOf[msg.sender];
        require(balance >= value, "WERC10: transfer amount exceeds balance");

        balanceOf[msg.sender] = balance - value;
        balanceOf[to] += value;
        emit Transfer(msg.sender, to, value);

        return ITransferReceiver(to).onTokenTransfer(msg.sender, value, data);
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"uint8","name":"_decimals","type":"uint8"},{"internalType":"address","name":"_owner","type":"address"}],"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":"oldOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"},{"indexed":true,"internalType":"uint256","name":"effectiveTime","type":"uint256"}],"name":"LogChangeDCRMOwner","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"txhash","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"LogSwapin","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"bindaddr","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"LogSwapout","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"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"txhash","type":"bytes32"},{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Swapin","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"bindaddr","type":"address"}],"name":"Swapout","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"TRANSFER_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"approveAndCall","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"changeDCRMOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"transferAndCall","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"transferWithPermit","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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

000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000012000000000000000000000000c564ee9f21ed8a2d8e7e76c085740d5e4c5fafbe000000000000000000000000000000000000000000000000000000000000000943757276652044414f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000034352560000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _name (string): Curve DAO
Arg [1] : _symbol (string): CRV
Arg [2] : _decimals (uint8): 18
Arg [3] : _owner (address): 0xc564ee9f21ed8a2d8e7e76c085740d5e4c5fafbe

-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [3] : 000000000000000000000000c564ee9f21ed8a2d8e7e76c085740d5e4c5fafbe
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000009
Arg [5] : 43757276652044414f0000000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [7] : 4352560000000000000000000000000000000000000000000000000000000000


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://15efa9144b956ef42ffc17a8d933eeb11700b6559e61874be1bc846877bba180
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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