DUBAI

• EIPs

  486 12,514 9.8 Python

  The Ethereum Improvement Proposal repository

  

/** *Submitted for verification at hecoinfo.com on 2021-11-07 */ pragma solidity ^0.8.6; // SPDX-License-Identifier: Unlicensed interface IERC20 { 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 ); } contract Ownable { address public _owner; /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == msg.sender, "Ownable: caller is not the owner"); _; } function changeOwner(address newOwner) public onlyOwner { _owner = newOwner; } } library SafeMath { /** * @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) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * 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); uint256 c = a - b; return c; } /** * @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) { // 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; } /** * @dev Returns the integer division of two unsigned integers. Reverts 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) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message 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, 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; } } contract DUBAI is IERC20, Ownable { using SafeMath for uint256; mapping(address => uint256) private _rOwned; mapping(address => uint256) private _tOwned; mapping(address => uint256) private buyAmount; mapping(address => mapping(address => uint256)) private _allowances; mapping(address => bool) private _isExcludedFromFee; uint256 private constant MAX = ~uint256(0); uint256 private _tTotal; uint256 private _rTotal; uint256 private _tFeeTotal; string private _name; string private _symbol; uint256 private _decimals; uint256 public _taxFee = 4; uint256 public _liquidityFee = 2; uint256 public _destroyFee = 3; address private _destroyAddress = address(0x000000000000000000000000000000000000dEaD); address public uniswapV2Pair; address public _fundddress; constructor(address tokenOwner,address fundaddress) { _name = "DUBAI"; _symbol = "DUBAI"; _decimals = 6; _fundddress = fundaddress; _tTotal = 41140000 * 10**_decimals; _rTotal = (MAX - (MAX % _tTotal)); _rOwned[tokenOwner] = _rTotal; //exclude owner and this contract from fee _isExcludedFromFee[tokenOwner] = true; _isExcludedFromFee[_fundddress] = true; _isExcludedFromFee[address(this)] = true; _owner = tokenOwner; emit Transfer(address(0), tokenOwner, _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint256) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(msg.sender, spender, amount); return true; } function transferFrom( address sender, address recipient, uint256 amount ) public override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, msg.sender, _allowances[sender][msg.sender].sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve( msg.sender, spender, _allowances[msg.sender][spender].add(addedValue) ); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve( msg.sender, spender, _allowances[msg.sender][spender].sub( subtractedValue, "ERC20: decreased allowance below zero" ) ); return true; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function tokenFromReflection(uint256 rAmount) public view returns (uint256) { require( rAmount <= _rTotal, "Amount must be less than total reflections" ); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeFromFee(address account) public onlyOwner { _isExcludedFromFee[account] = true; } function includeInFee(address account) public onlyOwner { _isExcludedFromFee[account] = false; } //to recieve ETH from uniswapV2Router when swaping receive() external payable {} function _getRate() private view returns (uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns (uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function claimTokens() public onlyOwner { payable(_owner).transfer(address(this).balance); } function isExcludedFromFee(address account) public view returns (bool) { return _isExcludedFromFee[account]; } function _approve( address owner, address spender, uint256 amount ) private { 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); } function _transfer( address from, address to, uint256 amount ) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); bool takeFee = true; if(_isExcludedFromFee[from]||_isExcludedFromFee[to]){ takeFee = false; } _tokenTransfer(from, to, amount,takeFee); } function _tokenTransfer( address sender, address recipient, uint256 tAmount, bool takeFee ) private { uint256 currentRate = _getRate(); uint256 rAmount = tAmount.mul(currentRate); _rOwned[sender] = _rOwned[sender].sub(rAmount); uint256 rate; if (takeFee) { _takeTransfer( sender, _fundddress, tAmount.div(100), currentRate ); _takeTransfer( sender, uniswapV2Pair, tAmount.div(100).mul(2), currentRate ); _reflectFee( rAmount.div(100).mul(_taxFee), tAmount.div(100).mul(_taxFee) ); rate = 7; } uint256 recipientRate = 100 - rate; _rOwned[recipient] = _rOwned[recipient].add( rAmount.div(100).mul(recipientRate) ); emit Transfer(sender, recipient, tAmount.div(100).mul(recipientRate)); } function _takeTransfer( address sender, address to, uint256 tAmount, uint256 currentRate ) private { uint256 rAmount = tAmount.mul(currentRate); _rOwned[to] = _rOwned[to].add(rAmount); emit Transfer(sender, to, tAmount); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function changeRouter(address router) public onlyOwner { uniswapV2Pair = router; } }

• openzeppelin-contracts

  233 24,079 9.5 JavaScript

  OpenZeppelin Contracts is a library for secure smart contract development.

  

/** *Submitted for verification at hecoinfo.com on 2021-11-07 */ pragma solidity ^0.8.6; // SPDX-License-Identifier: Unlicensed interface IERC20 { 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 ); } contract Ownable { address public _owner; /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(_owner == msg.sender, "Ownable: caller is not the owner"); _; } function changeOwner(address newOwner) public onlyOwner { _owner = newOwner; } } library SafeMath { /** * @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) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * 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); uint256 c = a - b; return c; } /** * @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) { // 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; } /** * @dev Returns the integer division of two unsigned integers. Reverts 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) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message 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, 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; } } contract DUBAI is IERC20, Ownable { using SafeMath for uint256; mapping(address => uint256) private _rOwned; mapping(address => uint256) private _tOwned; mapping(address => uint256) private buyAmount; mapping(address => mapping(address => uint256)) private _allowances; mapping(address => bool) private _isExcludedFromFee; uint256 private constant MAX = ~uint256(0); uint256 private _tTotal; uint256 private _rTotal; uint256 private _tFeeTotal; string private _name; string private _symbol; uint256 private _decimals; uint256 public _taxFee = 4; uint256 public _liquidityFee = 2; uint256 public _destroyFee = 3; address private _destroyAddress = address(0x000000000000000000000000000000000000dEaD); address public uniswapV2Pair; address public _fundddress; constructor(address tokenOwner,address fundaddress) { _name = "DUBAI"; _symbol = "DUBAI"; _decimals = 6; _fundddress = fundaddress; _tTotal = 41140000 * 10**_decimals; _rTotal = (MAX - (MAX % _tTotal)); _rOwned[tokenOwner] = _rTotal; //exclude owner and this contract from fee _isExcludedFromFee[tokenOwner] = true; _isExcludedFromFee[_fundddress] = true; _isExcludedFromFee[address(this)] = true; _owner = tokenOwner; emit Transfer(address(0), tokenOwner, _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint256) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } function allowance(address owner, address spender) public view override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public override returns (bool) { _approve(msg.sender, spender, amount); return true; } function transferFrom( address sender, address recipient, uint256 amount ) public override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, msg.sender, _allowances[sender][msg.sender].sub( amount, "ERC20: transfer amount exceeds allowance" ) ); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve( msg.sender, spender, _allowances[msg.sender][spender].add(addedValue) ); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve( msg.sender, spender, _allowances[msg.sender][spender].sub( subtractedValue, "ERC20: decreased allowance below zero" ) ); return true; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function tokenFromReflection(uint256 rAmount) public view returns (uint256) { require( rAmount <= _rTotal, "Amount must be less than total reflections" ); uint256 currentRate = _getRate(); return rAmount.div(currentRate); } function excludeFromFee(address account) public onlyOwner { _isExcludedFromFee[account] = true; } function includeInFee(address account) public onlyOwner { _isExcludedFromFee[account] = false; } //to recieve ETH from uniswapV2Router when swaping receive() external payable {} function _getRate() private view returns (uint256) { (uint256 rSupply, uint256 tSupply) = _getCurrentSupply(); return rSupply.div(tSupply); } function _getCurrentSupply() private view returns (uint256, uint256) { uint256 rSupply = _rTotal; uint256 tSupply = _tTotal; if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function claimTokens() public onlyOwner { payable(_owner).transfer(address(this).balance); } function isExcludedFromFee(address account) public view returns (bool) { return _isExcludedFromFee[account]; } function _approve( address owner, address spender, uint256 amount ) private { 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); } function _transfer( address from, address to, uint256 amount ) private { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(amount > 0, "Transfer amount must be greater than zero"); bool takeFee = true; if(_isExcludedFromFee[from]||_isExcludedFromFee[to]){ takeFee = false; } _tokenTransfer(from, to, amount,takeFee); } function _tokenTransfer( address sender, address recipient, uint256 tAmount, bool takeFee ) private { uint256 currentRate = _getRate(); uint256 rAmount = tAmount.mul(currentRate); _rOwned[sender] = _rOwned[sender].sub(rAmount); uint256 rate; if (takeFee) { _takeTransfer( sender, _fundddress, tAmount.div(100), currentRate ); _takeTransfer( sender, uniswapV2Pair, tAmount.div(100).mul(2), currentRate ); _reflectFee( rAmount.div(100).mul(_taxFee), tAmount.div(100).mul(_taxFee) ); rate = 7; } uint256 recipientRate = 100 - rate; _rOwned[recipient] = _rOwned[recipient].add( rAmount.div(100).mul(recipientRate) ); emit Transfer(sender, recipient, tAmount.div(100).mul(recipientRate)); } function _takeTransfer( address sender, address to, uint256 tAmount, uint256 currentRate ) private { uint256 rAmount = tAmount.mul(currentRate); _rOwned[to] = _rOwned[to].add(rAmount); emit Transfer(sender, to, tAmount); } function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function changeRouter(address router) public onlyOwner { uniswapV2Pair = router; } }

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

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