POL Price: $0.699494 (-0.06%)
 

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Method
Block
From
To
Withdraw615386162024-09-07 15:33:3891 days ago1725723218IN
0x5ECfeC22...2BD160f18
0 POL0.0012358432.99999999
Set Deadline505021692023-11-28 18:32:35375 days ago1701196355IN
0x5ECfeC22...2BD160f18
0 POL0.00482743158.77643447
Set Start Timest...505021142023-11-28 18:30:39375 days ago1701196239IN
0x5ECfeC22...2BD160f18
0 POL0.00483426158.77643447
Withdraw505017442023-11-28 18:17:33375 days ago1701195453IN
0x5ECfeC22...2BD160f18
0 POL0.00707474167.54485873
Migrate458637922023-08-03 15:23:41492 days ago1691076221IN
0x5ECfeC22...2BD160f18
0 POL0.01103204119.56907806
Migrate458281362023-08-02 17:56:43493 days ago1690999003IN
0x5ECfeC22...2BD160f18
0 POL0.0095974878.88455519

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Contract Source Code Verified (Exact Match)

Contract Name:
TarotMigrator

Compiler Version
v0.8.13+commit.abaa5c0e

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 5 : TarotMigrator.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";

contract TarotMigrator is Ownable, ReentrancyGuard {
  IERC20 immutable public oldToken;
  IERC20 immutable public wrappedOldToken;
  IERC20 immutable public newToken;
  bool immutable oldTokenIsNative;
  uint256 public expectedBalance;
  uint256 public startTimestamp;
  uint256 public deadline;
  uint256 public amountMigrated;

  event SetExpectedBalance(address indexed from, uint256 oldExpectedBalance, uint256 newExpectedBalance);
  event SetStartTimestamp(address indexed from, uint256 oldStartTimestamp, uint256 newStartTimestamp);
  event SetDeadline(address indexed from, uint256 oldDeadline, uint256 newDeadline);
  event Migrate(address indexed from, uint256 amount, uint256 totalAmountMigrated);
  event Withdraw(address indexed from, address indexed to, uint256 oldAmount, uint256 newAmount);

  constructor(
    IERC20 _oldToken,
    IERC20 _wrappedOldToken,
    IERC20 _newToken,
    bool _oldTokenIsNative,
    uint256 _expectedBalance,
    uint256 _startTimestamp,
    uint256 _deadline
  ) Ownable() ReentrancyGuard() {
    oldToken = _oldToken;
    wrappedOldToken = _wrappedOldToken;
    newToken = _newToken;
    oldTokenIsNative = _oldTokenIsNative;
    expectedBalance = _expectedBalance;
    startTimestamp = _startTimestamp;
    deadline = _deadline;
  }

  function setExpectedBalance(uint256 _expectedBalance) onlyOwner external {
    uint256 oldExpectedBalance = expectedBalance;
    expectedBalance = _expectedBalance;
    emit SetExpectedBalance(msg.sender, oldExpectedBalance, expectedBalance);
  }

  function setStartTimestamp(uint256 _startTimestamp) onlyOwner external {
    uint256 oldStartTimestamp = startTimestamp;
    startTimestamp = _startTimestamp;
    emit SetStartTimestamp(msg.sender, oldStartTimestamp, startTimestamp);
  }

  function setDeadline(uint256 _deadline) onlyOwner external {
    uint256 oldDeadline = deadline;
    deadline = _deadline;
    emit SetDeadline(msg.sender, oldDeadline, deadline);
  }

  function checkExpectedBalance() public view returns (bool) {
    if (oldTokenIsNative) {
      return oldToken.balanceOf(address(wrappedOldToken)) >= expectedBalance;
    } else {
      return oldToken.totalSupply() == expectedBalance;
    }
  }

  function migrate(uint256 amount) nonReentrant external {
    require(checkExpectedBalance(), "TarotMigrator: INVALID_BALANCE");
    require(block.timestamp >= startTimestamp, "TarotMigrator: TOO_SOON");
    require(block.timestamp < deadline, "TarotMigrator: TOO_LATE");
    require(amount > 0 && oldToken.balanceOf(msg.sender) >= amount, "TarotMigrator: INVALID_AMOUNT");
    oldToken.transferFrom(msg.sender, address(this), amount);
    newToken.transfer(msg.sender, amount);
    amountMigrated += amount;
    emit Migrate(msg.sender, amount, amountMigrated);
  }

  function withdraw(address to, uint256 oldAmount, uint256 newAmount) onlyOwner external {
    require(to != address(0), "TarotMigrator: INVALID_TO");
    if (oldAmount > 0) {
      oldToken.transfer(to, oldAmount);
    }
    if (newAmount > 0) {
      newToken.transfer(to, newAmount);
    }
    emit Withdraw(msg.sender, to, oldAmount, newAmount);
  }
}

File 2 of 5 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 5 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}

File 4 of 5 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from, address to, uint256 amount) external returns (bool);
}

File 5 of 5 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

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

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract IERC20","name":"_oldToken","type":"address"},{"internalType":"contract IERC20","name":"_wrappedOldToken","type":"address"},{"internalType":"contract IERC20","name":"_newToken","type":"address"},{"internalType":"bool","name":"_oldTokenIsNative","type":"bool"},{"internalType":"uint256","name":"_expectedBalance","type":"uint256"},{"internalType":"uint256","name":"_startTimestamp","type":"uint256"},{"internalType":"uint256","name":"_deadline","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"totalAmountMigrated","type":"uint256"}],"name":"Migrate","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"oldDeadline","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newDeadline","type":"uint256"}],"name":"SetDeadline","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"oldExpectedBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newExpectedBalance","type":"uint256"}],"name":"SetExpectedBalance","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"oldStartTimestamp","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newStartTimestamp","type":"uint256"}],"name":"SetStartTimestamp","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":"oldAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newAmount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"amountMigrated","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"checkExpectedBalance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"deadline","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"expectedBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"migrate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"newToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"oldToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_deadline","type":"uint256"}],"name":"setDeadline","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_expectedBalance","type":"uint256"}],"name":"setExpectedBalance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_startTimestamp","type":"uint256"}],"name":"setStartTimestamp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"oldAmount","type":"uint256"},{"internalType":"uint256","name":"newAmount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wrappedOldToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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Deployed Bytecode

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

000000000000000000000000d23ed8ca350ce2631f7ecdc5e6bf80d0a1debb7b0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000b092e1bf50f518b3ebf7ed26a40015183ae36ac2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000d1874f5f3f00792fb8fd0000000000000000000000000000000000000000000000000000000064c5a8000000000000000000000000000000000000000000000000000000000064ed3500

-----Decoded View---------------
Arg [0] : _oldToken (address): 0xd23Ed8cA350CE2631F7EcDC5E6bf80D0A1DeBB7B
Arg [1] : _wrappedOldToken (address): 0x0000000000000000000000000000000000000000
Arg [2] : _newToken (address): 0xb092e1BF50f518b3Ebf7eD26A40015183aE36AC2
Arg [3] : _oldTokenIsNative (bool): False
Arg [4] : _expectedBalance (uint256): 989470624729029688670461
Arg [5] : _startTimestamp (uint256): 1690675200
Arg [6] : _deadline (uint256): 1693267200

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000d23ed8ca350ce2631f7ecdc5e6bf80d0a1debb7b
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [2] : 000000000000000000000000b092e1bf50f518b3ebf7ed26a40015183ae36ac2
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [4] : 00000000000000000000000000000000000000000000d1874f5f3f00792fb8fd
Arg [5] : 0000000000000000000000000000000000000000000000000000000064c5a800
Arg [6] : 0000000000000000000000000000000000000000000000000000000064ed3500


Block Transaction Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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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.