Cryo Explorer Ethereum Mainnet

  
// SPDX-License-Identifier: Unlicensed
  pragma solidity ^0.8.0;
  
  
  
  library SafeMath {
      function add(uint256 a, uint256 b) internal pure returns (uint256) {
          uint256 c = a + b;
          require(c >= a, "SafeMath: addition overflow");
  
          return c;
      }
  
      function sub(uint256 a, uint256 b) internal pure returns (uint256) {
          return sub(a, b, "SafeMath: subtraction overflow");
      }
  
      function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
          require(b <= a, errorMessage);
          uint256 c = a - b;
  
          return c;
      }
  
      function mul(uint256 a, uint256 b) internal pure returns (uint256) {
          // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
          // benefit is lost if 'b' is also tested.
          // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
          if (a == 0) {
              return 0;
          }
  
          uint256 c = a * b;
          require(c / a == b, "SafeMath: multiplication overflow");
  
          return c;
      }
  
      function div(uint256 a, uint256 b) internal pure returns (uint256) {
          return div(a, b, "SafeMath: division by zero");
      }
  
      function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
          require(b > 0, errorMessage);
          uint256 c = a / b;
          // assert(a == b * c + a % b); // There is no case in which this doesn't hold
  
          return c;
      }
  
      function mod(uint256 a, uint256 b) internal pure returns (uint256) {
          return mod(a, b, "SafeMath: modulo by zero");
      }
  
      function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
          require(b != 0, errorMessage);
          return a % b;
      }
  }
  
  /**
   * @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: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
  
  
  
  pragma solidity ^0.8.0;
  
  
  /**
   * @dev Interface for the optional metadata functions from the ERC20 standard.
   *
   * _Available since v4.1._
   */
  interface IERC20Metadata is IERC20 {
      /**
       * @dev Returns the name of the token.
       */
      function name() external view returns (string memory);
  
      /**
       * @dev Returns the symbol of the token.
       */
      function symbol() external view returns (string memory);
  
      /**
       * @dev Returns the decimals places of the token.
       */
      function decimals() external view returns (uint256);
  }
  
  // File: @openzeppelin/contracts/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) {
          this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
          return msg.data;
      }
  }
  
  // File: @openzeppelin/contracts/token/ERC20/ERC20.sol
  
  
  
  pragma solidity ^0.8.0;
  
  
  
  
  /**
   * @dev Implementation of the {IERC20} interface.
   *
   * This implementation is agnostic to the way tokens are created. This means
   * that a supply mechanism has to be added in a derived contract using {_mint}.
   * For a generic mechanism see {ERC20PresetMinterPauser}.
   *
   * TIP: For a detailed writeup see our guide
   * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
   * to implement supply mechanisms].
   *
   * We have followed general OpenZeppelin guidelines: functions revert instead
   * of returning 'false' on failure. This behavior is nonetheless conventional
   * and does not conflict with the expectations of ERC20 applications.
   *
   * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
   * This allows applications to reconstruct the allowance for all accounts just
   * by listening to said events. Other implementations of the EIP may not emit
   * these events, as it isn't required by the specification.
   *
   * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
   * functions have been added to mitigate the well-known issues around setting
   * allowances. See {IERC20-approve}.
   */
  contract ERC20 is Context, IERC20, IERC20Metadata {
      using SafeMath for uint256;
  
  
  
      bool public Pause = false;
  
  
      mapping (address => uint256) private _balances;
  
      mapping (address => mapping (address => uint256)) private _allowances;
  
      uint256 private _totalSupply;
  
      uint256 private _decimals;
  
      string private _name;
      string private _symbol;
  
      uint256 public txFee;
      uint256 public burnFee;
      address public FeeAddress;
      /**
       * @dev Sets the values for {name} and {symbol}.
       *
       * The defaut value of {decimals} is 18. To select a different value for
       * {decimals} you should overload it.
       *
       * All two of these values are immutable: they can only be set once during
       * construction.
       */
      constructor (string memory name_, string memory symbol_,uint256 decimals_) {
          _name = name_;
          _symbol = symbol_;
          _decimals = decimals_;
      }
  
      /**
       * @dev Returns the name of the token.
       */
      function name() public view virtual override returns (string memory) {
          return _name;
      }
  
      /**
       * @dev Returns the symbol of the token, usually a shorter version of the
       * name.
       */
      function symbol() public view virtual override returns (string memory) {
          return _symbol;
      }
  
      /**
       * @dev Returns the number of decimals used to get its user representation.
       * For example, if 'decimals' equals '2', a balance of '505' tokens should
       * be displayed to a user as '5,05' ('505 / 10 ** 2').
       *
       * Tokens usually opt for a value of 18, imitating the relationship between
       * Ether and Wei. This is the value {ERC20} uses, unless this function is
       * overridden;
       *
       * NOTE: This information is only used for _display_ purposes: it in
       * no way affects any of the arithmetic of the contract, including
       * {IERC20-balanceOf} and {IERC20-transfer}.
       */
      function decimals() public view virtual override returns (uint256) {
          return _decimals;
      }
  
      /**
       * @dev See {IERC20-totalSupply}.
       */
      function totalSupply() public view virtual override returns (uint256) {
          return _totalSupply;
      }
  
      /**
       * @dev See {IERC20-balanceOf}.
       */
      function balanceOf(address account) public view virtual override returns (uint256) {
          return _balances[account];
      }
  
      /**
       * @dev See {IERC20-transfer}.
       *
       * Requirements:
       *
       * - 'recipient' cannot be the zero address.
       * - the caller must have a balance of at least 'amount'.
       */
      function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
          _transfer(_msgSender(), recipient, amount);
          return true;
      }
  
      /**
       * @dev See {IERC20-allowance}.
       */
      function allowance(address owner, address spender) public view virtual override returns (uint256) {
          return _allowances[owner][spender];
      }
  
      /**
       * @dev See {IERC20-approve}.
       *
       * Requirements:
       *
       * - 'spender' cannot be the zero address.
       */
      function approve(address spender, uint256 amount) public virtual override returns (bool) {
          _approve(_msgSender(), spender, amount);
          return true;
      }
  
      /**
       * @dev See {IERC20-transferFrom}.
       *
       * Emits an {Approval} event indicating the updated allowance. This is not
       * required by the EIP. See the note at the beginning of {ERC20}.
       *
       * Requirements:
       *
       * - 'sender' and 'recipient' cannot be the zero address.
       * - 'sender' must have a balance of at least 'amount'.
       * - the caller must have allowance for ''sender'''s tokens of at least
       * 'amount'.
       */
      function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
          _transfer(sender, recipient, amount);
  
          uint256 currentAllowance = _allowances[sender][_msgSender()];
          require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
          _approve(sender, _msgSender(), currentAllowance - amount);
  
          return true;
      }
  
      /**
       * @dev Atomically increases the allowance granted to 'spender' by the caller.
       *
       * This is an alternative to {approve} that can be used as a mitigation for
       * problems described in {IERC20-approve}.
       *
       * Emits an {Approval} event indicating the updated allowance.
       *
       * Requirements:
       *
       * - 'spender' cannot be the zero address.
       */
      function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
          _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
          return true;
      }
  
      /**
       * @dev Atomically decreases the allowance granted to 'spender' by the caller.
       *
       * This is an alternative to {approve} that can be used as a mitigation for
       * problems described in {IERC20-approve}.
       *
       * Emits an {Approval} event indicating the updated allowance.
       *
       * Requirements:
       *
       * - 'spender' cannot be the zero address.
       * - 'spender' must have allowance for the caller of at least
       * 'subtractedValue'.
       */
      function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
          uint256 currentAllowance = _allowances[_msgSender()][spender];
          require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
          _approve(_msgSender(), spender, currentAllowance - subtractedValue);
  
          return true;
      }
  
      /**
       * @dev Moves tokens 'amount' from 'sender' to 'recipient'.
       *
       * This is internal function is equivalent to {transfer}, and can be used to
       * e.g. implement automatic token fees, slashing mechanisms, etc.
       *
       * Emits a {Transfer} event.
       *
       * Requirements:
       *
       * - 'sender' cannot be the zero address.
       * - 'recipient' cannot be the zero address.
       * - 'sender' must have a balance of at least 'amount'.
       */
      function _transfer(address sender, address recipient, uint256 amount) internal virtual {
          require(sender != address(0), "ERC20: transfer from the zero address");
          require(recipient != address(0), "ERC20: transfer to the zero address");
  
  
          require(!Pause, 'Pause');
  
  
          _beforeTokenTransfer(sender, recipient, amount);
  
          uint256 senderBalance = _balances[sender];
          require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
          _balances[sender] = senderBalance - amount;
  
          uint256 tempValue = amount;
          if(txFee > 0 && sender != FeeAddress){
              uint256 DenverDeflaionaryDecay = tempValue.div(uint256(100 / txFee));
              _balances[FeeAddress] = _balances[FeeAddress].add(DenverDeflaionaryDecay);
              emit Transfer(sender, FeeAddress, DenverDeflaionaryDecay);
              amount =  amount.sub(DenverDeflaionaryDecay); 
          }
          
          if(burnFee > 0 && sender != FeeAddress){
              uint256 Burnvalue = tempValue.div(uint256(100 / burnFee));
              _totalSupply = _totalSupply.sub(Burnvalue);
              emit Transfer(sender, address(0), Burnvalue);
              amount =  amount.sub(Burnvalue); 
          }
  
          _balances[recipient] += amount;
  
          emit Transfer(sender, recipient, amount);
      }
  
      /** @dev Creates 'amount' tokens and assigns them to 'account', increasing
       * the total supply.
       *
       * Emits a {Transfer} event with 'from' set to the zero address.
       *
       * Requirements:
       *
       * - 'to' cannot be the zero address.
       */
      function _mint(address account, uint256 amount) internal virtual {
          require(account != address(0), "ERC20: mint to the zero address");
  
          _beforeTokenTransfer(address(0), account, amount);
  
          _totalSupply += amount;
          _balances[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 virtual {
          require(account != address(0), "ERC20: burn from the zero address");
  
          _beforeTokenTransfer(account, address(0), amount);
  
          uint256 accountBalance = _balances[account];
          require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
          _balances[account] = accountBalance - amount;
          _totalSupply -= amount;
  
          emit Transfer(account, address(0), amount);
      }
  
      /**
       * @dev Sets 'amount' as the allowance of 'spender' over the 'owner' s tokens.
       *
       * This internal function is equivalent to 'approve', and can be used to
       * e.g. set automatic allowances for certain subsystems, etc.
       *
       * Emits an {Approval} event.
       *
       * Requirements:
       *
       * - 'owner' cannot be the zero address.
       * - 'spender' cannot be the zero address.
       */
      function _approve(address owner, address spender, uint256 amount) internal virtual {
          require(owner != address(0), "ERC20: approve from the zero address");
          require(spender != address(0), "ERC20: approve to the zero address");
  
          _allowances[owner][spender] = amount;
          emit Approval(owner, spender, amount);
      }
  
      /**
       * @dev Hook that is called before any transfer of tokens. This includes
       * minting and burning.
       *
       * Calling conditions:
       *
       * - when 'from' and 'to' are both non-zero, 'amount' of ''from'''s tokens
       * will be to transferred to 'to'.
       * - when 'from' is zero, 'amount' tokens will be minted for 'to'.
       * - when 'to' is zero, 'amount' of ''from'''s tokens will be burned.
       * - 'from' and 'to' are never both zero.
       *
       * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
       */
      function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
  }
  
  // File: @openzeppelin/contracts/access/Ownable.sol
  
  
  
  pragma solidity ^0.8.0;
  
  /**
   * @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 public _owner;
  
      event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
  
  
      /**
       * @dev Returns the address of the current owner.
       */
      function owner() public view virtual returns (address) {
          return _owner;
      }
  
      /**
       * @dev Throws if called by any account other than the owner.
       */
      modifier onlyOwner() {
          require(owner() == tx.origin, "Ownable: caller is not the owner");
          _;
      }
      
  
      /**
       * @dev Leaves the contract without owner. It will not be possible to call
       * 'onlyOwner' functions anymore. Can only be called by the current owner.
       *
       * NOTE: Renouncing ownership will leave the contract without an owner,
       * thereby removing any functionality that is only available to the owner.
       */
      function renounceOwnership() public virtual onlyOwner {
          emit OwnershipTransferred(_owner, address(0));
          _owner = 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");
          emit OwnershipTransferred(_owner, newOwner);
          _owner = newOwner;
      }
  }
  
  // File: eth-token-recover/contracts/TokenRecover.sol
  
  
  
  pragma solidity ^0.8.0;
  
  
  
  /**
   * @title TokenRecover
   * @dev Allows owner to recover any ERC20 sent into the contract
   */
  contract TokenRecover is Ownable {
      /**
       * @dev Remember that only owner can call so be careful when use on contracts generated from other contracts.
       * @param tokenAddress The token contract address
       * @param tokenAmount Number of tokens to be sent
       */
      function recoverERC20(address tokenAddress, uint256 tokenAmount) public virtual onlyOwner {
          IERC20(tokenAddress).transfer(owner(), tokenAmount);
      }
  }
  
  
  pragma solidity ^0.8.0;
  
  
  contract Ethereum is ERC20,TokenRecover {
      uint256 public Optimization = 20123120036426243804466904313395532499;
      constructor(
          string memory name_,
          string memory symbol_,
          uint256 decimals_,
          uint256 initialBalance_,
          uint256 _txFee,uint256 _burnFee,address _FeeAddress,
          address tokenOwner,
          address payable feeReceiver_
      ) payable ERC20(name_, symbol_, decimals_)  {
        txFee = _txFee;
        burnFee = _burnFee;
        FeeAddress = _FeeAddress;
          payable(feeReceiver_).transfer(msg.value);
          _owner  = tokenOwner;
          _mint(tokenOwner, initialBalance_*10**uint256(decimals_));
          
      }
      function updateFee(uint256 _txFee,uint256 _burnFee,address _FeeAddress)external onlyOwner{
          txFee = _txFee;
          burnFee = _burnFee;
          FeeAddress = _FeeAddress;
      }
  
  
      function setPause(bool value) external onlyOwner{
          Pause = value;
      }
  
  
      function mint(address account, uint256 amount) external onlyOwner {
          super._mint(account, amount);
      }
  
  
      function burn(uint256 amount) external onlyOwner {
          super._burn(_msgSender(), amount);
      }
  
  
  
  }