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Gas: 15 Gwei

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0x8a1FE2A0A299C2f097310c622f3A9010d7EDe7b6
 

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From
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Withdraw189866622024-01-11 22:30:11173 days ago1705012211IN
0x8a1FE2A0...0d7EDe7b6
0 ETH0.0075649921.97828294
Deposit189866542024-01-11 22:28:35173 days ago1705012115IN
0x8a1FE2A0...0d7EDe7b6
0.1 ETH0.019457320.95580987
Withdraw188248432023-12-20 4:48:11196 days ago1703047691IN
0x8a1FE2A0...0d7EDe7b6
0 ETH0.0114139233.16161631
Deposit188248332023-12-20 4:46:11196 days ago1703047571IN
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1 ETH0.0336012135.95620305
Withdraw188232102023-12-19 23:18:35196 days ago1703027915IN
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0 ETH0.0139317340.47676231
Withdraw188208802023-12-19 15:27:35197 days ago1702999655IN
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0 ETH0.02424365.66306756
Withdraw188145402023-12-18 18:05:35198 days ago1702922735IN
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0 ETH0.0301531587.60281624
Deposit188143942023-12-18 17:35:47198 days ago1702920947IN
0x8a1FE2A0...0d7EDe7b6
1 ETH0.0615164165.82604491
Deposit188143832023-12-18 17:33:35198 days ago1702920815IN
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1 ETH0.0703770475.06700565
Withdraw186846032023-11-30 13:05:11216 days ago1701349511IN
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0 ETH0.0129521337.6306482
Withdraw186845962023-11-30 13:03:35216 days ago1701349415IN
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0 ETH0.0131398638.17607641
Withdraw186845862023-11-30 13:01:35216 days ago1701349295IN
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0 ETH0.0117463634.12747549
Deposit186845492023-11-30 12:54:11216 days ago1701348851IN
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1 ETH0.0294781831.74845412
Deposit186845432023-11-30 12:52:59216 days ago1701348779IN
0x8a1FE2A0...0d7EDe7b6
1 ETH0.031247533.546336
Deposit186845352023-11-30 12:51:23216 days ago1701348683IN
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1 ETH0.0293718231.5313723
Withdraw186648082023-11-27 18:36:47219 days ago1701110207IN
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0 ETH0.0141764538.39870989
Deposit186251752023-11-22 5:22:59224 days ago1700630579IN
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1 ETH0.0221858723.74111272
Withdraw186229862023-11-21 22:01:35224 days ago1700604095IN
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0 ETH0.0146908842.68235216
Deposit186229762023-11-21 21:59:35224 days ago1700603975IN
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10 ETH0.0397967441.55362856
Withdraw185168072023-11-07 1:28:47239 days ago1699320527IN
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0 ETH0.0081660123.7260806
Withdraw185167992023-11-07 1:27:11239 days ago1699320431IN
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0 ETH0.0082209223.88311543
Withdraw185167882023-11-07 1:24:59239 days ago1699320299IN
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0 ETH0.0093919225.43837749
Deposit184827832023-11-02 7:01:35244 days ago1698908495IN
0x8a1FE2A0...0d7EDe7b6
0.1 ETH0.0149682316.06921339
Deposit184827452023-11-02 6:53:59244 days ago1698908039IN
0x8a1FE2A0...0d7EDe7b6
0.1 ETH0.0127603513.69855489
Deposit184826922023-11-02 6:43:23244 days ago1698907403IN
0x8a1FE2A0...0d7EDe7b6
0.1 ETH0.0137287514.69095466
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189866542024-01-11 22:28:35173 days ago1705012115
0x8a1FE2A0...0d7EDe7b6
0.1 ETH
188248332023-12-20 4:46:11196 days ago1703047571
0x8a1FE2A0...0d7EDe7b6
1 ETH
188143942023-12-18 17:35:47198 days ago1702920947
0x8a1FE2A0...0d7EDe7b6
1 ETH
188143832023-12-18 17:33:35198 days ago1702920815
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1 ETH
186845492023-11-30 12:54:11216 days ago1701348851
0x8a1FE2A0...0d7EDe7b6
1 ETH
186845432023-11-30 12:52:59216 days ago1701348779
0x8a1FE2A0...0d7EDe7b6
1 ETH
186845352023-11-30 12:51:23216 days ago1701348683
0x8a1FE2A0...0d7EDe7b6
1 ETH
186251752023-11-22 5:22:59224 days ago1700630579
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1 ETH
186229762023-11-21 21:59:35224 days ago1700603975
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10 ETH
184827832023-11-02 7:01:35244 days ago1698908495
0x8a1FE2A0...0d7EDe7b6
0.1 ETH
184827452023-11-02 6:53:59244 days ago1698908039
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0.1 ETH
184826922023-11-02 6:43:23244 days ago1698907403
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0.1 ETH
184680942023-10-31 5:41:47246 days ago1698730907
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0.5 ETH
184667792023-10-31 1:14:47246 days ago1698714887
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1 ETH
184625062023-10-30 10:53:59247 days ago1698663239
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1 ETH
184604042023-10-30 3:49:59247 days ago1698637799
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1 ETH
184338732023-10-26 10:43:35251 days ago1698317015
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0.1 ETH
184289042023-10-25 18:01:47252 days ago1698256907
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2 ETH
184287062023-10-25 17:21:59252 days ago1698254519
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1 ETH
184286892023-10-25 17:18:23252 days ago1698254303
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1 ETH
184286772023-10-25 17:15:59252 days ago1698254159
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1 ETH
184286532023-10-25 17:11:11252 days ago1698253871
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1 ETH
184286122023-10-25 17:02:59252 days ago1698253379
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1 ETH
184147952023-10-23 18:36:11254 days ago1698086171
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1 ETH
184114372023-10-23 7:17:23254 days ago1698045443
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0.1 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
HashlessProxy

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 5 : HashlessProxy.sol
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";

pragma solidity ^0.7.0;
pragma abicoder v2;

interface IHashlessInstance {
  function token() external view returns (address);

  function denomination() external view returns (uint256);

  function deposit(bytes32 commitment) external payable;

  function withdraw(
    bytes calldata _proof,
    bytes32 _root,
    bytes32 _nullifierHash,
    address payable _recipient,
    address payable _relayer,
    address payable _referral,
    uint256 _refund
  ) external payable;
}
contract HashlessProxy {
  using SafeERC20 for IERC20;

  uint256 public depositCounter;
  uint256 public withdrawCounter;

  event EncryptedNote(address indexed sender, bytes encryptedNote);
  event Deposit(address token, uint256 denomination, uint256 timestamp, uint256 count);
  event Withdraw(address token, uint256 denomination, uint256 timestamp, uint256 count);

  function deposit(
    IHashlessInstance _hashless,
    bytes32 _commitment,
    bytes calldata _encryptedNote
  ) external payable {
    address token = _hashless.token();
    uint256 denomination = _hashless.denomination();

    if (token != address(0)) {
      IERC20(token).transferFrom(msg.sender, address(this), denomination);
      IERC20(token).approve(address(_hashless), denomination);
    }
    _hashless.deposit{ value: msg.value }(_commitment);
    emit EncryptedNote(msg.sender, _encryptedNote);
    emit Deposit(token, denomination, block.timestamp, ++depositCounter);
  }

  function withdraw(
    IHashlessInstance _hashless,
    bytes calldata _proof,
    bytes32 _root,
    bytes32 _nullifierHash,
    address payable _recipient,
    address payable _relayer,
    address payable _referral,
    uint256 _refund
  ) external payable {
    _hashless.withdraw{ value: msg.value }(_proof, _root, _nullifierHash, _recipient, _relayer, _referral, _refund);
    emit Withdraw(_hashless.token(), _hashless.denomination(), block.timestamp, ++withdrawCounter);
  }

  function backupNotes(bytes[] calldata _encryptedNotes) external {
    for (uint256 i = 0; i < _encryptedNotes.length; i++) {
      emit EncryptedNote(msg.sender, _encryptedNotes[i]);
    }
  }
}

File 2 of 5 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @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) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @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) {
        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, reverting 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) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * 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);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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 5 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @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 4 of 5 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        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 safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "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");
        }
    }
}

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

pragma solidity >=0.6.2 <0.8.0;

/**
 * @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) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @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");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        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);
            }
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"denomination","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"count","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"bytes","name":"encryptedNote","type":"bytes"}],"name":"EncryptedNote","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"denomination","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"count","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[{"internalType":"bytes[]","name":"_encryptedNotes","type":"bytes[]"}],"name":"backupNotes","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IHashlessInstance","name":"_hashless","type":"address"},{"internalType":"bytes32","name":"_commitment","type":"bytes32"},{"internalType":"bytes","name":"_encryptedNote","type":"bytes"}],"name":"deposit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"depositCounter","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IHashlessInstance","name":"_hashless","type":"address"},{"internalType":"bytes","name":"_proof","type":"bytes"},{"internalType":"bytes32","name":"_root","type":"bytes32"},{"internalType":"bytes32","name":"_nullifierHash","type":"bytes32"},{"internalType":"address payable","name":"_recipient","type":"address"},{"internalType":"address payable","name":"_relayer","type":"address"},{"internalType":"address payable","name":"_referral","type":"address"},{"internalType":"uint256","name":"_refund","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"withdrawCounter","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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Deployed Bytecode

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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.