creation_sourcecode: // File: @openzeppelin/contracts/security/ReentrancyGuard.sol
  
  
  // 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: @openzeppelin/contracts/utils/Context.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @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;
      }
  
      function _contextSuffixLength() internal view virtual returns (uint256) {
          return 0;
      }
  }
  
  // File: @openzeppelin/contracts/access/Ownable.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
  
  pragma solidity ^0.8.20;
  
  
  /**
   * @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.
   *
   * The initial owner is set to the address provided by the deployer. 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;
  
      /**
       * @dev The caller account is not authorized to perform an operation.
       */
      error OwnableUnauthorizedAccount(address account);
  
      /**
       * @dev The owner is not a valid owner account. (eg. `address(0)`)
       */
      error OwnableInvalidOwner(address owner);
  
      event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
  
      /**
       * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
       */
      constructor(address initialOwner) {
          if (initialOwner == address(0)) {
              revert OwnableInvalidOwner(address(0));
          }
          _transferOwnership(initialOwner);
      }
  
      /**
       * @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 {
          if (owner() != _msgSender()) {
              revert OwnableUnauthorizedAccount(_msgSender());
          }
      }
  
      /**
       * @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 {
          if (newOwner == address(0)) {
              revert OwnableInvalidOwner(address(0));
          }
          _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: @openzeppelin/contracts/token/ERC20/IERC20.sol
  
  
  // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)
  
  pragma solidity ^0.8.20;
  
  /**
   * @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 value of tokens in existence.
       */
      function totalSupply() external view returns (uint256);
  
      /**
       * @dev Returns the value of tokens owned by `account`.
       */
      function balanceOf(address account) external view returns (uint256);
  
      /**
       * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);
  
      /**
       * @dev Moves a `value` amount of tokens from `from` to `to` using the
       * allowance mechanism. `value` 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 value) external returns (bool);
  }
  
  // File: contracts/Cadaico Tokensale/Cadaico Token Vesting.sol
  
  
  pragma solidity ^0.8.0;
  
  
  
  
  /**
   * @title TokenVesting
   * @dev A token holder contract that can release its token balance gradually like a
   * typical vesting scheme, with a cliff and vesting period. Optionally revocable by the owner.
   */
  contract TokenVesting is Ownable, ReentrancyGuard {
      IERC20 private _token;
  
      struct VestingSchedule {
          uint256 amountTotal;
          uint256 amountReleased;
          bool isBlacklisted;
      }
  
      uint256 public start;
      uint256 public duration;
  
      mapping(address => VestingSchedule) public vestingSchedules;
  
      event BeneficiaryAdded(address indexed beneficiary, uint256 totalAmount);
      event TokensReleased(address indexed beneficiary, uint256 amount);
      event BeneficiaryBlacklisted(address indexed beneficiary);
      event BeneficiaryWhitelisted(address indexed beneficiary);
      event VestingScheduleUpdated(uint256 start, uint256 duration);
  
      /**
       * @dev Sets the initial parameters for the vesting contract.
       */
      constructor(address initialOwner) Ownable(initialOwner) {}
  
      /**
       * @notice Adds multiple beneficiaries to the vesting schedule in a single transaction.
       * @param beneficiaries Array of addresses of the beneficiaries to whom vested tokens are transferred.
       * @param totalAmounts Array of total amounts of tokens to be vested for each beneficiary.
       */
      function addBeneficiaries(address[] calldata beneficiaries, uint256[] calldata totalAmounts) public onlyOwner {
          require(beneficiaries.length == totalAmounts.length, "TokenVesting: Array lengths do not match");
          for (uint256 i = 0; i < beneficiaries.length; i++) {
              address beneficiary = beneficiaries[i];
              uint256 totalAmount = totalAmounts[i]*(10**18);
              require(beneficiary != address(0), "TokenVesting: beneficiary is the zero address");
              require(vestingSchedules[beneficiary].amountTotal == 0, "TokenVesting: beneficiary already added");
              vestingSchedules[beneficiary] = VestingSchedule(totalAmount, 0, false);
              emit BeneficiaryAdded(beneficiary, totalAmount);
          }
      }
  
      /**
       * @notice Sets the global vesting schedule for all beneficiaries.
       * @param _start The time (as Unix time) at which point vesting starts.
       * @param _duration Duration in seconds of the period in which the tokens will vest.
       */
      function setVestingSchedule(uint256 _start, uint256 _duration) public onlyOwner {
          start = _start;
          duration = _duration;
          emit VestingScheduleUpdated(_start, _duration);
      }
  
      /**
       * @notice Transfers vested tokens to beneficiary
       */
      function Withdraw() public nonReentrant {
          address beneficiary = msg.sender; // beneficiary is the message sender
          require(!vestingSchedules[beneficiary].isBlacklisted, "TokenVesting: beneficiary is blacklisted");
          require(vestingSchedules[beneficiary].amountTotal > 0, "TokenVesting: sender is not a beneficiary");
          uint256 unreleased = _releasableAmount(beneficiary);
  
          require(unreleased > 0, "TokenVesting: no tokens are due");
  
          vestingSchedules[beneficiary].amountReleased += unreleased;
          _token.transfer(beneficiary, unreleased);
  
          emit TokensReleased(beneficiary, unreleased);
      }
  
      /**
       * @notice Calculates the amount that has already vested but hasn't been released yet.
       * @param beneficiary address of the beneficiary
       */
      function _releasableAmount(address beneficiary) public view returns (uint256) {
          return _vestedAmount(beneficiary) - vestingSchedules[beneficiary].amountReleased;
      }
  
      /**
       * @notice Calculates the amount that has already vested.
       * @param beneficiary address of the beneficiary
       */
      function _vestedAmount(address beneficiary) private view returns (uint256) {
          VestingSchedule storage schedule = vestingSchedules[beneficiary];
          uint256 totalBalance = schedule.amountTotal;
  
          if (block.timestamp < start) {
              return 0;
          } else if (block.timestamp >= start + duration) {
              return totalBalance;
          } else {
              uint256 initialUnlock = totalBalance * 15 / 100;
              uint256 postStart = block.timestamp - start;
              uint256 remainingBalance = totalBalance - initialUnlock;
              uint256 vestingDuration = duration;
  
              return initialUnlock + (remainingBalance * postStart / vestingDuration);
          }
      }
  
      /**
       * @notice Blacklists a beneficiary
       * @param beneficiary address of the beneficiary
       */
      function blacklistBeneficiary(address beneficiary) public onlyOwner {
          vestingSchedules[beneficiary].isBlacklisted = true;
          emit BeneficiaryBlacklisted(beneficiary);
      }
  
      /**
       * @notice Whitelists a beneficiary
       * @param beneficiary address of the beneficiary
       */
      function whitelistBeneficiary(address beneficiary) public onlyOwner {
          vestingSchedules[beneficiary].isBlacklisted = false;
          emit BeneficiaryWhitelisted(beneficiary);
      }
  
      /**
       * @dev Set the token for vesting.
       * @param newToken address of the new ERC20 token
       */
      function setToken(address newToken) public onlyOwner {
          require(newToken != address(0), "TokenVesting: new token is the zero address");
          _token = IERC20(newToken);
      }
  
      function ownerWithdraw(uint256 amount) public onlyOwner nonReentrant {
          require(amount > 0, "TokenVesting: Amount must be greater than 0");
         
          _token.transfer(owner(), amount);
      }
  
  }