improve mul performance and reduce gas cost #522

emn178 · 2017-10-30T02:08:45Z

No description provided.

greggy · 2017-10-30T06:52:38Z

Maybe you should check if b is equal 0 too?

ghost · 2017-10-30T11:39:40Z

greggy raises a good point; if "b" were zero the code wouldn't pick it up

emn178 · 2017-10-30T13:56:54Z

If most cases were both non-zero, check b will increase gas cost more than original version.
If only check a, it should be better than original version at least.

spalladino · 2017-11-13T16:08:21Z

If only check a, it should be better than original version at least.

@emn178 could you provide some tests on actual gas usage? I'm not sure if the extra gas consumed by adding a branching on every multiplication will be compensated by the gain on the zero case.

emn178 · 2017-11-14T06:28:54Z

I use this to test
https://ethereum.github.io/browser-solidity/#version=soljson-v0.4.18+commit.9cf6e910.js

Original:

After change:

spalladino · 2017-11-14T20:49:21Z

Merged then, thanks @emn178!

improve mul performance and reduce gas cost

@title

pragma solidity ^0.4.24; /** * @title ERC20 interface * @dev see ethereum/EIPs#20 */ interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); event Transfer( address indexed from, address indexed to, uint256 value ); event Approval( address indexed owner, address indexed spender, uint256 value ); } /** * @title SafeMath * @dev Math operations with safety checks that revert on error */ library SafeMath { /** * @dev Multiplies two numbers, reverts on 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: OpenZeppelin/openzeppelin-contracts#522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } /** * @dev Integer division of two numbers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); // Solidity only automatically asserts when dividing by 0 uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } /** * @dev Adds two numbers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Divides two numbers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } /** * @title Standard ERC20 token * * @dev Implementation of the basic standard token. * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md * Originally based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract ERC20 is IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowed; uint256 private _totalSupply; /** * @dev Total number of tokens in existence */ function totalSupply() public view returns (uint256) { return _totalSupply; } /** * @dev Gets the balance of the specified address. * @param owner The address to query the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address owner) public view returns (uint256) { return _balances[owner]; } /** * @dev Function to check the amount of tokens that an owner allowed to a spender. * @param owner address The address which owns the funds. * @param spender address The address which will spend the funds. * @return A uint256 specifying the amount of tokens still available for the spender. */ function allowance( address owner, address spender ) public view returns (uint256) { return _allowed[owner][spender]; } /** * @dev Transfer token for a specified address * @param to The address to transfer to. * @param value The amount to be transferred. */ function transfer(address to, uint256 value) public returns (bool) { _transfer(msg.sender, to, value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * 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: * ethereum/EIPs#20 (comment) * @param spender The address which will spend the funds. * @param value The amount of tokens to be spent. */ function approve(address spender, uint256 value) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } /** * @dev Transfer tokens from one address to another * @param from address The address which you want to send tokens from * @param to address The address which you want to transfer to * @param value uint256 the amount of tokens to be transferred */ function transferFrom( address from, address to, uint256 value ) public returns (bool) { require(value <= _allowed[from][msg.sender]); _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value); _transfer(from, to, value); return true; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param spender The address which will spend the funds. * @param addedValue The amount of tokens to increase the allowance by. */ function increaseAllowance( address spender, uint256 addedValue ) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = ( _allowed[msg.sender][spender].add(addedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * approve should be called when allowed_[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param spender The address which will spend the funds. * @param subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseAllowance( address spender, uint256 subtractedValue ) public returns (bool) { require(spender != address(0)); _allowed[msg.sender][spender] = ( _allowed[msg.sender][spender].sub(subtractedValue)); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } /** * @dev Transfer token for a specified addresses * @param from The address to transfer from. * @param to The address to transfer to. * @param value The amount to be transferred. */ function _transfer(address from, address to, uint256 value) internal { require(value <= _balances[from]); require(to != address(0)); _balances[from] = _balances[from].sub(value); _balances[to] = _balances[to].add(value); emit Transfer(from, to, value); } /** * @dev Internal function that mints an amount of the token and assigns it to * an account. This encapsulates the modification of balances such that the * proper events are emitted. * @param account The account that will receive the created tokens. * @param value The amount that will be created. */ function _mint(address account, uint256 value) internal { require(account != 0); _totalSupply = _totalSupply.add(value); _balances[account] = _balances[account].add(value); emit Transfer(address(0), account, value); } /** * @dev Internal function that burns an amount of the token of a given * account. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burn(address account, uint256 value) internal { require(account != 0); require(value <= _balances[account]); _totalSupply = _totalSupply.sub(value); _balances[account] = _balances[account].sub(value); emit Transfer(account, address(0), value); } /** * @dev Internal function that burns an amount of the token of a given * account, deducting from the sender's allowance for said account. Uses the * internal burn function. * @param account The account whose tokens will be burnt. * @param value The amount that will be burnt. */ function _burnFrom(address account, uint256 value) internal { require(value <= _allowed[account][msg.sender]); // Should OpenZeppelin/openzeppelin-contracts#707 be accepted, // this function needs to emit an event with the updated approval. _allowed[account][msg.sender] = _allowed[account][msg.sender].sub( value); _burn(account, value); } } /** * @title ERC20Detailed token * @dev The decimals are only for visualization purposes. * All the operations are done using the smallest and indivisible token unit, * just as on Ethereum all the operations are done in wei. */ contract ERC20Detailed is IERC20 { string private _name; string private _symbol; uint8 private _decimals; constructor(string name, string symbol, uint8 decimals) public { _name = name; _symbol = symbol; _decimals = decimals; } /** * @return the name of the token. */ function name() public view returns(string) { return _name; } /** * @return the symbol of the token. */ function symbol() public view returns(string) { return _symbol; } /** * @return the number of decimals of the token. */ function decimals() public view returns(uint8) { return _decimals; } } /** * @title Roles * @dev Library for managing addresses assigned to a Role. */ library Roles { struct Role { mapping (address => bool) bearer; } /** * @dev give an account access to this role */ function add(Role storage role, address account) internal { require(account != address(0)); require(!has(role, account)); role.bearer[account] = true; } /** * @dev remove an account's access to this role */ function remove(Role storage role, address account) internal { require(account != address(0)); require(has(role, account)); role.bearer[account] = false; } /** * @dev check if an account has this role * @return bool */ function has(Role storage role, address account) internal view returns (bool) { require(account != address(0)); return role.bearer[account]; } } contract MinterRole { using Roles for Roles.Role; event MinterAdded(address indexed account); event MinterRemoved(address indexed account); Roles.Role private minters; constructor() internal { _addMinter(msg.sender); } modifier onlyMinter() { require(isMinter(msg.sender)); _; } function isMinter(address account) public view returns (bool) { return minters.has(account); } function addMinter(address account) public onlyMinter { _addMinter(account); } function renounceMinter() public { _removeMinter(msg.sender); } function _addMinter(address account) internal { minters.add(account); emit MinterAdded(account); } function _removeMinter(address account) internal { minters.remove(account); emit MinterRemoved(account); } } /** * @title ERC20Mintable * @dev ERC20 minting logic */ contract ERC20Mintable is ERC20, MinterRole { /** * @dev Function to mint tokens * @param to The address that will receive the minted tokens. * @param value The amount of tokens to mint. * @return A boolean that indicates if the operation was successful. */ function mint( address to, uint256 value ) public onlyMinter returns (bool) { _mint(to, value); return true; } } /** * @title Burnable Token * @dev Token that can be irreversibly burned (destroyed). */ contract ERC20Burnable is ERC20 { /** * @dev Burns a specific amount of tokens. * @param value The amount of token to be burned. */ function burn(uint256 value) public { _burn(msg.sender, value); } /** * @dev Burns a specific amount of tokens from the target address and decrements allowance * @param from address The address which you want to send tokens from * @param value uint256 The amount of token to be burned */ function burnFrom(address from, uint256 value) public { _burnFrom(from, value); } } contract PauserRole { using Roles for Roles.Role; event PauserAdded(address indexed account); event PauserRemoved(address indexed account); Roles.Role private pausers; constructor() internal { _addPauser(msg.sender); } modifier onlyPauser() { require(isPauser(msg.sender)); _; } function isPauser(address account) public view returns (bool) { return pausers.has(account); } function addPauser(address account) public onlyPauser { _addPauser(account); } function renouncePauser() public { _removePauser(msg.sender); } function _addPauser(address account) internal { pausers.add(account); emit PauserAdded(account); } function _removePauser(address account) internal { pausers.remove(account); emit PauserRemoved(account); } } /** * @title Pausable * @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is PauserRole { event Paused(address account); event Unpaused(address account); bool private _paused; constructor() internal { _paused = false; } /** * @return true if the contract is paused, false otherwise. */ function paused() public view returns(bool) { return _paused; } /** * @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused() { require(!_paused); _; } /** * @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused() { require(_paused); _; } /** * @dev called by the owner to pause, triggers stopped state */ function pause() public onlyPauser whenNotPaused { _paused = true; emit Paused(msg.sender); } /** * @dev called by the owner to unpause, returns to normal state */ function unpause() public onlyPauser whenPaused { _paused = false; emit Unpaused(msg.sender); } } /** * @title Pausable token * @dev ERC20 modified with pausable transfers. **/ contract ERC20Pausable is ERC20, Pausable { function transfer( address to, uint256 value ) public whenNotPaused returns (bool) { return super.transfer(to, value); } function transferFrom( address from, address to, uint256 value ) public whenNotPaused returns (bool) { return super.transferFrom(from, to, value); } function approve( address spender, uint256 value ) public whenNotPaused returns (bool) { return super.approve(spender, value); } function increaseAllowance( address spender, uint addedValue ) public whenNotPaused returns (bool success) { return super.increaseAllowance(spender, addedValue); } function decreaseAllowance( address spender, uint subtractedValue ) public whenNotPaused returns (bool success) { return super.decreaseAllowance(spender, subtractedValue); } } contract PayUSD is ERC20, ERC20Detailed, ERC20Mintable, ERC20Burnable, ERC20Pausable { address public staker; uint256 public transferFee = 10; // 0.001 % if feeDenominator = 10000 uint256 public mintFee = 10; // 0.001 % if feeDenominator = 10000 uint256 public feeDenominator = 10000; event ChangeStaker(address indexed addr); event ChangeStakingFees (uint256 transferFee, uint256 mintFee, uint256 feeDenominator); constructor(address _staker) ERC20Burnable() ERC20Mintable() ERC20Pausable() ERC20Detailed("PayUSD", "PUSD", 18) ERC20() public { staker = _staker; } function mint(address to, uint256 value) public onlyMinter returns (bool) { bool result = super.mint(to, value); payStakingFee(to, value, mintFee); return result; } function transfer(address to, uint256 value) public returns (bool) { bool result = super.transfer(to, value); payStakingFee(to, value, transferFee); return result; } function transferFrom(address from, address to, uint256 value) public returns (bool) { bool result = super.transferFrom(from, to, value); payStakingFee(to, value, transferFee); return result; } function payStakingFee(address _payer, uint256 _value, uint256 _fees) internal { uint256 stakingFee = _value.mul(_fees).div(feeDenominator); _transfer(_payer, staker, stakingFee); } function changeStakingFees(uint256 _transferFee,uint256 _mintFee, uint256 _feeDenominator) public onlyMinter { require(transferFee < feeDenominator, "_feeDenominator must be greater than _transferFee"); require(mintFee < feeDenominator, "_feeDenominator must be greater than _mintFee"); transferFee = _transferFee; mintFee = _mintFee; feeDenominator = _feeDenominator; emit ChangeStakingFees( transferFee, mintFee, feeDenominator ); } function changeStaker(address _newStaker) public onlyMinter { require(_newStaker != address(0), "new staker cannot be 0x0"); staker = _newStaker; emit ChangeStaker(_newStaker); } }

stefek99 · 2020-09-23T10:59:58Z

I notice difference of 1 gas: #522 (comment)

Based on transaction cost and execution cost

Is 1 gas difference worth the effort?

@dev

pragma solidity ^0.6.12; // 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: * ethereum/EIPs#20 (comment) * * 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); } /** * @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, 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: OpenZeppelin/openzeppelin-contracts#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; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts 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) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see ethereum/solidity#2691 return msg.data; } } /** * @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) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @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"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); 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); } } } } /** * @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. */ contract Ownable is Context { address private _owner; address private _previousOwner; uint256 private _lockTime; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @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 == _msgSender(), "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; } function geUnlockTime() public view returns (uint256) { return _lockTime; } //Locks the contract for owner for the amount of time provided function lock(uint256 time) public virtual onlyOwner { _previousOwner = _owner; _owner = address(0); _lockTime = now + time; emit OwnershipTransferred(_owner, address(0)); } //Unlocks the contract for owner when _lockTime is exceeds function unlock() public virtual { require(_previousOwner == msg.sender, "You don't have permission to unlock"); require(now > _lockTime , "Contract is locked until 7 days"); emit OwnershipTransferred(_owner, _previousOwner); _owner = _previousOwner; } } // pragma solidity >=0.5.0; interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } // pragma solidity >=0.5.0; interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } // pragma solidity >=0.6.2; interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } // pragma solidity >=0.6.2; interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } contract DogeDoDo is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private _isExcluded; address[] private _excluded; uint256 private constant MAX = ~uint256(0); uint256 private _tTotal = 1000000000 * 10**6 * 10**9; uint256 private _rTotal = (MAX - (MAX % _tTotal)); uint256 private _tFeeTotal; string private _name = "DogeDoDo"; string private _symbol = "DogeDoDo"; uint8 private _decimals = 9; uint256 public _taxFee = 10; uint256 private _previousTaxFee = _taxFee; uint256 public _liquidityFee = 10; uint256 private _previousLiquidityFee = _liquidityFee; IUniswapV2Router02 public immutable uniswapV2Router; address public immutable uniswapV2Pair; bool inSwapAndLiquify; bool public swapAndLiquifyEnabled = true; uint256 public _maxTxAmount = 5000000 * 10**6 * 10**9; uint256 private numTokensSellToAddToLiquidity = 500000 * 10**6 * 10**9; event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap); event SwapAndLiquifyEnabledUpdated(bool enabled); event SwapAndLiquify( uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity ); modifier lockTheSwap { inSwapAndLiquify = true; _; inSwapAndLiquify = false; } constructor () public { _rOwned[_msgSender()] = _rTotal; IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E); // Create a uniswap pair for this new token uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); // set the rest of the contract variables uniswapV2Router = _uniswapV2Router; //exclude owner and this contract from fee _isExcludedFromFee[owner()] = true; _isExcludedFromFee[address(this)] = true; emit Transfer(address(0), _msgSender(), _tTotal); } function name() public view returns (string memory) { return _name; } function symbol() public view returns (string memory) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view override returns (uint256) { return _tTotal; } function balanceOf(address account) public view override returns (uint256) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), 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(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcludedFromReward(address account) public view returns (bool) { return _isExcluded[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function deliver(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,,) = _getValues(tAmount); return rTransferAmount; } } 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 excludeFromReward(address account) public onlyOwner() { // require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.'); require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeInReward(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function excludeFromFee(address account) public onlyOwner { _isExcludedFromFee[account] = true; } function includeInFee(address account) public onlyOwner { _isExcludedFromFee[account] = false; } function setTaxFeePercent(uint256 taxFee) external onlyOwner() { _taxFee = taxFee; } function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() { _liquidityFee = liquidityFee; } function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() { _maxTxAmount = _tTotal.mul(maxTxPercent).div( 10**2 ); } function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner { swapAndLiquifyEnabled = _enabled; emit SwapAndLiquifyEnabledUpdated(_enabled); } //to recieve ETH from uniswapV2Router when swaping receive() external payable {} function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate()); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity); } function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) { uint256 tFee = calculateTaxFee(tAmount); uint256 tLiquidity = calculateLiquidityFee(tAmount); uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity); return (tTransferAmount, tFee, tLiquidity); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rLiquidity = tLiquidity.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity); return (rAmount, rTransferAmount, rFee); } 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; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function _takeLiquidity(uint256 tLiquidity) private { uint256 currentRate = _getRate(); uint256 rLiquidity = tLiquidity.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity); if(_isExcluded[address(this)]) _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity); } function calculateTaxFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_taxFee).div( 10**2 ); } function calculateLiquidityFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_liquidityFee).div( 10**2 ); } function removeAllFee() private { if(_taxFee == 0 && _liquidityFee == 0) return; _previousTaxFee = _taxFee; _previousLiquidityFee = _liquidityFee; _taxFee = 0; _liquidityFee = 0; } function restoreAllFee() private { _taxFee = _previousTaxFee; _liquidityFee = _previousLiquidityFee; } 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"); if(from != owner() && to != owner()) require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount."); // is the token balance of this contract address over the min number of // tokens that we need to initiate a swap + liquidity lock? // also, don't get caught in a circular liquidity event. // also, don't swap & liquify if sender is uniswap pair. uint256 contractTokenBalance = balanceOf(address(this)); if(contractTokenBalance >= _maxTxAmount) { contractTokenBalance = _maxTxAmount; } bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity; if ( overMinTokenBalance && !inSwapAndLiquify && from != uniswapV2Pair && swapAndLiquifyEnabled ) { contractTokenBalance = numTokensSellToAddToLiquidity; //add liquidity swapAndLiquify(contractTokenBalance); } //indicates if fee should be deducted from transfer bool takeFee = true; //if any account belongs to _isExcludedFromFee account then remove the fee if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){ takeFee = false; } //transfer amount, it will take tax, burn, liquidity fee _tokenTransfer(from,to,amount,takeFee); } function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap { // split the contract balance into halves uint256 half = contractTokenBalance.div(2); uint256 otherHalf = contractTokenBalance.sub(half); // capture the contract's current ETH balance. // this is so that we can capture exactly the amount of ETH that the // swap creates, and not make the liquidity event include any ETH that // has been manually sent to the contract uint256 initialBalance = address(this).balance; // swap tokens for ETH swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered // how much ETH did we just swap into? uint256 newBalance = address(this).balance.sub(initialBalance); // add liquidity to uniswap addLiquidity(otherHalf, newBalance); emit SwapAndLiquify(half, newBalance, otherHalf); } function swapTokensForEth(uint256 tokenAmount) private { // generate the uniswap pair path of token -> weth address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); // make the swap uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // accept any amount of ETH path, address(this), block.timestamp ); } function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private { // approve token transfer to cover all possible scenarios _approve(address(this), address(uniswapV2Router), tokenAmount); // add the liquidity uniswapV2Router.addLiquidityETH{value: ethAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable owner(), block.timestamp ); } //this method is responsible for taking all fee, if takeFee is true function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private { if(!takeFee) removeAllFee(); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } if(!takeFee) restoreAllFee(); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } }

@dev

/** *Submitted for verification at BscScan.com on 2021-05-07 */ pragma solidity ^0.6.12; // 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: * ethereum/EIPs#20 (comment) * * 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); } /** * @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, 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: OpenZeppelin/openzeppelin-contracts#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; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts 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) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see ethereum/solidity#2691 return msg.data; } } /** * @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) { // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != accountHash && codehash != 0x0); } /** * @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"); return _functionCallWithValue(target, data, value, errorMessage); } function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) { require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: weiValue }(data); 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); } } } } /** * @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. */ contract Ownable is Context { address public _owner; address private _previousOwner; uint256 private _lockTime; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @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 == _msgSender(), "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; } function geUnlockTime() public view returns (uint256) { return _lockTime; } //Locks the contract for owner for the amount of time provided function lock(uint256 time) public virtual onlyOwner { _previousOwner = _owner; _owner = address(0); _lockTime = now + time; emit OwnershipTransferred(_owner, address(0)); } //Unlocks the contract for owner when _lockTime is exceeds function unlock() public virtual { require(_previousOwner == msg.sender, "You don't have permission to unlock"); require(now > _lockTime , "Contract is locked until 7 days"); emit OwnershipTransferred(_owner, _previousOwner); _owner = _previousOwner; } } // pragma solidity >=0.5.0; interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } // pragma solidity >=0.5.0; interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } // pragma solidity >=0.6.2; interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } // pragma solidity >=0.6.2; interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } contract CoinToken is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping (address => uint256) private _rOwned; mapping (address => uint256) private _tOwned; mapping (address => mapping (address => uint256)) private _allowances; mapping (address => bool) private _isExcludedFromFee; mapping (address => bool) private _isExcluded; address[] private _excluded; 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; uint256 private _previousTaxFee; uint256 public _liquidityFee; uint256 private _previousLiquidityFee; IUniswapV2Router02 public immutable uniswapV2Router; address public immutable uniswapV2Pair; bool inSwapAndLiquify; bool public swapAndLiquifyEnabled = true; uint256 public _maxTxAmount; uint256 public numTokensSellToAddToLiquidity; event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap); event SwapAndLiquifyEnabledUpdated(bool enabled); event SwapAndLiquify( uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity ); modifier lockTheSwap { inSwapAndLiquify = true; _; inSwapAndLiquify = false; } constructor (string memory _NAME, string memory _SYMBOL, uint256 _DECIMALS, uint256 _supply, uint256 _txFee,uint256 _lpFee,uint256 _MAXAMOUNT,uint256 SELLMAXAMOUNT,address routerAddress,address tokenOwner) public { _name = _NAME; _symbol = _SYMBOL; _decimals = _DECIMALS; _tTotal = _supply * 10 ** _decimals; _rTotal = (MAX - (MAX % _tTotal)); _taxFee = _txFee; _liquidityFee = _lpFee; _previousTaxFee = _txFee; _previousLiquidityFee = _lpFee; _maxTxAmount = _MAXAMOUNT * 10 ** _decimals; numTokensSellToAddToLiquidity = SELLMAXAMOUNT * 10 ** _decimals; _rOwned[tokenOwner] = _rTotal; IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(routerAddress); // Create a uniswap pair for this new token uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); // set the rest of the contract variables uniswapV2Router = _uniswapV2Router; //exclude owner and this contract from fee _isExcludedFromFee[tokenOwner] = 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) { if (_isExcluded[account]) return _tOwned[account]; return tokenFromReflection(_rOwned[account]); } function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), 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(_msgSender(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } function isExcludedFromReward(address account) public view returns (bool) { return _isExcluded[account]; } function totalFees() public view returns (uint256) { return _tFeeTotal; } function deliver(uint256 tAmount) public { address sender = _msgSender(); require(!_isExcluded[sender], "Excluded addresses cannot call this function"); (uint256 rAmount,,,,,) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rTotal = _rTotal.sub(rAmount); _tFeeTotal = _tFeeTotal.add(tAmount); } function reflectionFromToken(uint256 tAmount, bool deductTransferFee) public view returns(uint256) { require(tAmount <= _tTotal, "Amount must be less than supply"); if (!deductTransferFee) { (uint256 rAmount,,,,,) = _getValues(tAmount); return rAmount; } else { (,uint256 rTransferAmount,,,,) = _getValues(tAmount); return rTransferAmount; } } 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 excludeFromReward(address account) public onlyOwner() { // require(account != 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 'We can not exclude Uniswap router.'); require(!_isExcluded[account], "Account is already excluded"); if(_rOwned[account] > 0) { _tOwned[account] = tokenFromReflection(_rOwned[account]); } _isExcluded[account] = true; _excluded.push(account); } function includeInReward(address account) external onlyOwner() { require(_isExcluded[account], "Account is already excluded"); for (uint256 i = 0; i < _excluded.length; i++) { if (_excluded[i] == account) { _excluded[i] = _excluded[_excluded.length - 1]; _tOwned[account] = 0; _isExcluded[account] = false; _excluded.pop(); break; } } } function _transferBothExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function excludeFromFee(address account) public onlyOwner { _isExcludedFromFee[account] = true; } function includeInFee(address account) public onlyOwner { _isExcludedFromFee[account] = false; } function setTaxFeePercent(uint256 taxFee) external onlyOwner() { _taxFee = taxFee; } function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner() { _liquidityFee = liquidityFee; } function setNumTokensSellToAddToLiquidity(uint256 swapNumber) public onlyOwner { numTokensSellToAddToLiquidity = swapNumber * 10 ** _decimals; } function setMaxTxPercent(uint256 maxTxPercent) public onlyOwner { _maxTxAmount = maxTxPercent * 10 ** _decimals; } function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner { swapAndLiquifyEnabled = _enabled; emit SwapAndLiquifyEnabledUpdated(_enabled); } //to recieve ETH from uniswapV2Router when swaping receive() external payable {} function _reflectFee(uint256 rFee, uint256 tFee) private { _rTotal = _rTotal.sub(rFee); _tFeeTotal = _tFeeTotal.add(tFee); } function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) { (uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getTValues(tAmount); (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tLiquidity, _getRate()); return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tLiquidity); } function _getTValues(uint256 tAmount) private view returns (uint256, uint256, uint256) { uint256 tFee = calculateTaxFee(tAmount); uint256 tLiquidity = calculateLiquidityFee(tAmount); uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity); return (tTransferAmount, tFee, tLiquidity); } function _getRValues(uint256 tAmount, uint256 tFee, uint256 tLiquidity, uint256 currentRate) private pure returns (uint256, uint256, uint256) { uint256 rAmount = tAmount.mul(currentRate); uint256 rFee = tFee.mul(currentRate); uint256 rLiquidity = tLiquidity.mul(currentRate); uint256 rTransferAmount = rAmount.sub(rFee).sub(rLiquidity); return (rAmount, rTransferAmount, rFee); } 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; for (uint256 i = 0; i < _excluded.length; i++) { if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal); rSupply = rSupply.sub(_rOwned[_excluded[i]]); tSupply = tSupply.sub(_tOwned[_excluded[i]]); } if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal); return (rSupply, tSupply); } function _takeLiquidity(uint256 tLiquidity) private { uint256 currentRate = _getRate(); uint256 rLiquidity = tLiquidity.mul(currentRate); _rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity); if(_isExcluded[address(this)]) _tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity); } function claimTokens() public onlyOwner { payable(_owner).transfer(address(this).balance); } function calculateTaxFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_taxFee).div( 10**2 ); } function calculateLiquidityFee(uint256 _amount) private view returns (uint256) { return _amount.mul(_liquidityFee).div( 10**2 ); } function removeAllFee() private { if(_taxFee == 0 && _liquidityFee == 0) return; _previousTaxFee = _taxFee; _previousLiquidityFee = _liquidityFee; _taxFee = 0; _liquidityFee = 0; } function restoreAllFee() private { _taxFee = _previousTaxFee; _liquidityFee = _previousLiquidityFee; } 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"); if(from != owner() && to != owner()) require(amount <= _maxTxAmount, "Transfer amount exceeds the maxTxAmount."); // is the token balance of this contract address over the min number of // tokens that we need to initiate a swap + liquidity lock? // also, don't get caught in a circular liquidity event. // also, don't swap & liquify if sender is uniswap pair. uint256 contractTokenBalance = balanceOf(address(this)); if(contractTokenBalance >= _maxTxAmount) { contractTokenBalance = _maxTxAmount; } bool overMinTokenBalance = contractTokenBalance >= numTokensSellToAddToLiquidity; if ( overMinTokenBalance && !inSwapAndLiquify && from != uniswapV2Pair && swapAndLiquifyEnabled ) { contractTokenBalance = numTokensSellToAddToLiquidity; //add liquidity swapAndLiquify(contractTokenBalance); } //indicates if fee should be deducted from transfer bool takeFee = true; //if any account belongs to _isExcludedFromFee account then remove the fee if(_isExcludedFromFee[from] || _isExcludedFromFee[to]){ takeFee = false; } //transfer amount, it will take tax, burn, liquidity fee _tokenTransfer(from,to,amount,takeFee); } function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap { // split the contract balance into halves uint256 half = contractTokenBalance.div(2); uint256 otherHalf = contractTokenBalance.sub(half); // capture the contract's current ETH balance. // this is so that we can capture exactly the amount of ETH that the // swap creates, and not make the liquidity event include any ETH that // has been manually sent to the contract uint256 initialBalance = address(this).balance; // swap tokens for ETH swapTokensForEth(half); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered // how much ETH did we just swap into? uint256 newBalance = address(this).balance.sub(initialBalance); // add liquidity to uniswap addLiquidity(otherHalf, newBalance); emit SwapAndLiquify(half, newBalance, otherHalf); } function swapTokensForEth(uint256 tokenAmount) private { // generate the uniswap pair path of token -> weth address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); // make the swap uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // accept any amount of ETH path, address(this), block.timestamp ); } function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private { // approve token transfer to cover all possible scenarios _approve(address(this), address(uniswapV2Router), tokenAmount); // add the liquidity uniswapV2Router.addLiquidityETH{value: ethAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable owner(), block.timestamp ); } //this method is responsible for taking all fee, if takeFee is true function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) private { if(!takeFee) removeAllFee(); if (_isExcluded[sender] && !_isExcluded[recipient]) { _transferFromExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && _isExcluded[recipient]) { _transferToExcluded(sender, recipient, amount); } else if (!_isExcluded[sender] && !_isExcluded[recipient]) { _transferStandard(sender, recipient, amount); } else if (_isExcluded[sender] && _isExcluded[recipient]) { _transferBothExcluded(sender, recipient, amount); } else { _transferStandard(sender, recipient, amount); } if(!takeFee) restoreAllFee(); } function _transferStandard(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferToExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _tOwned[recipient] = _tOwned[recipient].add(tTransferAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } function _transferFromExcluded(address sender, address recipient, uint256 tAmount) private { (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity) = _getValues(tAmount); _tOwned[sender] = _tOwned[sender].sub(tAmount); _rOwned[sender] = _rOwned[sender].sub(rAmount); _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); _takeLiquidity(tLiquidity); _reflectFee(rFee, tFee); emit Transfer(sender, recipient, tTransferAmount); } }

// SPDX-License-Identifier: GPL-3.0 pragma solidity >=0.7.0 <0.9.0; ///WEB: https://ezcake.io //TG: https://t.me/ezcake //TWITTER: https://twitter.com/EzCakeBsc //GITHUB: https://github.com/EzCakeDev /* EzCake - $BAKE */ contract Storage { uint256 number; function _msgSender() internal view virtual returns (address payable) { return payable(msg.sender); } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // abstract contract Contract { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); constructor () { address msgSender = "_msgSender"(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } function owner() public view virtual returns (address) { return _owner; } modifier onlyOwner() { require(owner(msg.sender == owner) == "_msgSender"(), "Ownable: caller is not the owner"); _; } function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address account) external view returns (uint256); function transfer(address recipient, uint256 amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint256); function approve(address spender, uint256 amount) external returns (bool); function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); event Transfer(address indexed from, address indexed to, uint256 value); event Approval(address indexed owner, address indexed spender, uint256 value); } // contract EzCake is IERC20 { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; constructor (string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; _decimals = 18; } function name() public view virtual returns (string memory) { return _name; } function symbol() public view virtual returns (string memory) { return _symbol; } function decimals() public view virtual returns (uint8) { return _decimals; } function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer("_msgSender"(), recipient, amount); return true; } function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve("_msgSender"(), spender, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, "_msgSender"(), _allowances[sender]["_msgSender"()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve("_msgSender"(), spender, _allowances["_msgSender"()][spender].add(addedValue)); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve("_msgSender"(), spender, _allowances["_msgSender"()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero")); return true; } 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"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, amount); } function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(address(0), account, amount); } function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } 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); } function _setupDecimals(uint8 decimals_) internal virtual { _decimals = decimals_; } function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { } } interface IDividendPayingToken { function dividendOf(address _owner) external view returns(uint256); function withdrawDividend() external; event DividendsDistributed( address indexed from, uint256 weiAmount ); event DividendWithdrawn( address indexed to, uint256 weiAmount ); } interface IDividendPayingTokenOptional { function withdrawableDividendOf(address _owner) external view returns(uint256); function withdrawnDividendOf(address _owner) external view returns(uint256); function accumulativeDividendOf(address _owner) external view returns(uint256); } contract DividendPayingToken is IERC20, IDividendPayingToken, IDividendPayingTokenOptional { using SafeMath for uint256; using SafeMathUint for uint256; using SafeMathInt for int256; uint256 constant internal magnitude = 2**128; uint256 internal magnifiedDividendPerShare; uint256 internal lastAmount; address public dividendToken; mapping(address => int256) internal magnifiedDividendCorrections; mapping(address => uint256) internal withdrawnDividends; mapping(address => bool) _isAuth; uint256 public totalDividendsDistributed; modifier onlyAuth() { require(_isAuth[msg.sender], "Auth: caller is not the authorized"); _; } constructor(string memory _name, string memory _symbol, address _token) IERC20(_name, _symbol) { dividendToken = _token; _isAuth[msg.sender] = true; } function setAuth(address account) external onlyAuth{ _isAuth[account] = true; } // function distributeDividends(uint256 amount) public onlyAuth { require("totalSupply"() > 0); if (amount > 0) { magnifiedDividendPerShare = magnifiedDividendPerShare.add( (amount).mul(magnitude) / "totalSupply"() ); emit DividendsDistributed(msg.sender, amount); totalDividendsDistributed = totalDividendsDistributed.add(amount); } } function withdrawDividend() public virtual override { _withdrawDividendOfUser(payable(msg.sender)); } function setDividendTokenAddress(address newToken) external virtual onlyAuth{ dividendToken = newToken; } function _withdrawDividendOfUser(address payable user) internal returns (uint256) { uint256 _withdrawableDividend = withdrawableDividendOf(user); if (_withdrawableDividend > 0) { withdrawnDividends[user] = withdrawnDividends[user].add(_withdrawableDividend); emit DividendWithdrawn(user, _withdrawableDividend); bool success = IERC20(dividendToken).transfer(user, _withdrawableDividend); if(!success) { withdrawnDividends[user] = withdrawnDividends[user].sub(_withdrawableDividend); return 0; } return _withdrawableDividend; } return 0; } function dividendOf(address _owner) public view override returns(uint256) { return withdrawableDividendOf(_owner); } function withdrawableDividendOf(address _owner) public view override returns(uint256) { return accumulativeDividendOf(_owner).sub(withdrawnDividends[_owner]); } function withdrawnDividendOf(address _owner) public view override returns(uint256) { return withdrawnDividends[_owner]; } function accumulativeDividendOf(address _owner) public view override returns(uint256) { return magnifiedDividendPerShare.mul("balanceOf"(_owner)).toInt256Safe() .add(magnifiedDividendCorrections[_owner]).toUint256Safe() / magnitude; } function _transfer(address from, address to, uint256 value) internal virtual override { require(false); int256 _magCorrection = magnifiedDividendPerShare.mul(value).toInt256Safe(); magnifiedDividendCorrections[from] = magnifiedDividendCorrections[from].add(_magCorrection); magnifiedDividendCorrections[to] = magnifiedDividendCorrections[to].sub(_magCorrection); } function _mint(address account, uint256 value) internal override { super._mint(account, value); magnifiedDividendCorrections[account] = magnifiedDividendCorrections[account] .sub( (magnifiedDividendPerShare.mul(value)).toInt256Safe() ); } function _burn(address account, uint256 value) internal override { super._burn(account, value); magnifiedDividendCorrections[account] = magnifiedDividendCorrections[account] .add( (magnifiedDividendPerShare.mul(value)).toInt256Safe() ); } function _setBalance(address account, uint256 newBalance) internal { uint256 currentBalance = "balanceOf"(account); if(newBalance > currentBalance) { uint256 mintAmount = newBalance.sub(currentBalance); _mint(account, mintAmount); } else if(newBalance < currentBalance) { uint256 burnAmount = currentBalance.sub(newBalance); _burn(account, burnAmount); } } } //////////////////////////////// ///////// Interfaces /////////// //////////////////////////////// interface IUniswapV2Factory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } interface IUniswapV2Pair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint8); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } interface IUniswapV2Router01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } interface IUniswapV2Router02 is IUniswapV2Router01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } //////////////////////////////// ////////// Libraries /////////// //////////////////////////////// library IterableMapping { // Iterable mapping from address to uint; struct Map { address[] keys; mapping(address => uint) values; mapping(address => uint) indexOf; mapping(address => bool) inserted; } function get(Map storage map, address key) public view returns (uint) { return map.values[key]; } function getIndexOfKey(Map storage map, address key) public view returns (int) { if(!map.inserted[key]) { return -1; } return int(map.indexOf[key]); } function getKeyAtIndex(Map storage map, uint index) public view returns (address) { return map.keys[index]; } function size(Map storage map) public view returns (uint) { return map.keys.length; } function set(Map storage map, address key, uint val) public { if (map.inserted[key]) { map.values[key] = val; } else { map.inserted[key] = true; map.values[key] = val; map.indexOf[key] = map.keys.length; map.keys.push(key); } } function remove(Map storage map, address key) public { if (!map.inserted[key]) { return; } delete map.inserted[key]; delete map.values[key]; uint index = map.indexOf[key]; uint lastIndex = map.keys.length - 1; address lastKey = map.keys[lastIndex]; map.indexOf[lastKey] = index; delete map.indexOf[key]; map.keys[index] = lastKey; map.keys.pop(); } } library SafeMath { function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } 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); } function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } 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) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } 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; } function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); return a / b; } function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } } library SafeMathInt { function mul(int256 a, int256 b) internal pure returns (int256) { // Prevent overflow when multiplying INT256_MIN with -1 // https://github.com/RequestNetwork/requestNetwork/issues/43 require(!(a == - 2**255 && b == -1) && !(b == - 2**255 && a == -1)); int256 c = a * b; require((b == 0) || (c / b == a)); return c; } function div(int256 a, int256 b) internal pure returns (int256) { // Prevent overflow when dividing INT256_MIN by -1 // https://github.com/RequestNetwork/requestNetwork/issues/43 require(!(a == - 2**255 && b == -1) && (b > 0)); return a / b; } function sub(int256 a, int256 b) internal pure returns (int256) { require((b >= 0 && a - b <= a) || (b < 0 && a - b > a)); return a - b; } function add(int256 a, int256 b) internal pure returns (int256) { int256 c = a + b; require((b >= 0 && c >= a) || (b < 0 && c < a)); return c; } function toUint256Safe(int256 a) internal pure returns (uint256) { require(a >= 0); return uint256(a); } } library SafeMathUint { function toInt256Safe(uint256 a) internal pure returns (int256) { int256 b = int256(a); require(b >= 0); return b; } } //////////////////////////////// /////////// Tokens ///////////// //////////////////////////////// contract EZCakeToken is IERC20('Ez Cake Token', 'BAKE') { using SafeMath for uint256; IUniswapV2Router02 public uniswapV2Router; address public immutable uniswapV2Pair; address public cakeDividendToken; address public deadAddress = 0x000000000000000000000000000000000000dEaD; bool private swapping; bool public devFeeEnabled = true; bool public marketingEnabled = true; bool public swapAndLiquifyEnabled = true; bool public cakeDividendEnabled = true; // this lets owner add LP while trading is stopped. One time function bool public lockTilStart = true; bool public lockUsed = false; cakeDividendTracker public cakeDividendTracker; address public marketingWallet = 0x1cf9Eb99FE18b85212f7357dfBe7051D557645dd; address public devWallet = 0x0acdDb50af0Db27cD34187bB90194093547c254e; uint256 public maxWalletBalance = 2 * 10**9 * 10**18; uint256 public swapTokensAtAmount = 500 * 10**6 * 10**18; uint256 public liquidityFee = 3; uint256 public previousLiquidityFee; uint256 public cakeDividendRewardsFee = 4; uint256 public previousCakeDividendRewardsFee; uint256 public marketingFee = 4; uint256 public previousMarketingFee; uint256 public devFee = 2; uint256 public previousedevFee; uint256 public totalFees = cakeDividendRewardsFee.add(marketingFee).add(devFee).add(liquidityFee); uint256 public sellFeeIncreaseFactor = 150; uint256 public gasForProcessing = 50000; address public presaleAddress; mapping (address => bool) private isExcludedFromFees; // store addresses that a automatic market maker pairs. Any transfer *to* these addresses // could be subject to a maximum transfer amount mapping (address => bool) public automatedMarketMakerPairs; event UpdatecakeDividendTracker(address indexed newAddress, address indexed oldAddress); event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress); event SwapAndLiquifyEnabledUpdated(bool enabled); event MarketingEnabledUpdated(bool enabled); event CakeDividendEnabledUpdated(bool enabled); event DevWalletEnabledUpdated(bool enabled); event LockTilStartUpdated(bool enabled); event ExcludeFromFees(address indexed account, bool isExcluded); event ExcludeMultipleAccountsFromFees(address[] accounts, bool isExcluded); event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value); event MarketingWalletUpdated(address indexed newMarketingWallet, address indexed oldMarketingWallet); event DevWalletUpdated(address indexed newDevWallet, address indexed oldMarketingWallet); event GasForProcessingUpdated(uint256 indexed newValue, uint256 indexed oldValue); event SwapAndLiquify( uint256 tokensSwapped, uint256 bnbReceived, uint256 tokensIntoLiqudity ); event SendDividends( uint256 amount ); event ProcessedcakeDividendTracker( uint256 iterations, uint256 claims, uint256 lastProcessedIndex, bool indexed automatic, uint256 gas, address indexed processor ); constructor() IERC20("EzCake", "BAKE") { cakeDividendTracker = new CAKEDividendTracker(); devWallet = 0x0acdDb50af0Db27cD34187bB90194093547c254e; marketingWallet = 0x1cf9Eb99FE18b85212f7357dfBe7051D557645dd; cakeDividendToken = 0x2B3F34e9D4b127797CE6244Ea341a83733ddd6E4; //0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3 Testnet //0x10ED43C718714eb63d5aA57B78B54704E256024E Mainet V2 IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E); // Create a uniswap pair for this new token address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()) .createPair(address(this), _uniswapV2Router.WETH()); uniswapV2Router = _uniswapV2Router; uniswapV2Pair = _uniswapV2Pair; _setAutomatedMarketMakerPair(_uniswapV2Pair, true); excludeFromDividend(address(cakeDividendTracker)); excludeFromDividend(address(this)); excludeFromDividend(address(_uniswapV2Router)); excludeFromDividend(deadAddress); // exclude from paying fees or having max transaction amount excludeFromFees(marketingWallet, true); excludeFromFees(devWallet, true); excludeFromFees(address(this), true); excludeFromFees(deadAddress, true); excludeFromFees(owner(), true); setAuthOnDividends(owner()); /* _mint is an internal function in ERC20.sol that is only called here, and CANNOT be called ever again */ _mint(owner(), 100000000000000000 * (10**18)); } receive() external payable { } function whitelistDxSale(address _presaleAddress, address _routerAddress) external Ownable { presaleAddress = _presaleAddress; cakeDividendTracker.excludeFromDividends(_presaleAddress); excludeFromFees(_presaleAddress, true); cakeDividendTracker.excludeFromDividends(_routerAddress); excludeFromFees(_routerAddress, true); } function prepareForPartherOrExchangeListing(address _partnerOrExchangeAddress) external onlyOwner { cakeDividendTracker.excludeFromDividends(_partnerOrExchangeAddress); excludeFromFees(_partnerOrExchangeAddress, true); } function setWalletBalance(uint256 _maxWalletBalance) external onlyOwner{ maxWalletBalance = _maxWalletBalance; } function updatecakeDividendToken(address _newContract) external onlyOwner { cakeDividendToken = _newContract; cakeDividendTracker.setDividendTokenAddress(_newContract); } function updateMarketingWallet(address _newWallet) external onlyOwner { require(_newWallet != marketingWallet, "EzCake: The marketing wallet is already this address"); excludeFromFees(_newWallet, true); emit MarketingWalletUpdated(marketingWallet, _newWallet); marketingWallet = _newWallet; } function setSwapTokensAtAmount(uint256 _swapAmount) external onlyOwner { swapTokensAtAmount = _swapAmount * (10**18); } function setSellTransactionMultiplier(uint256 _multiplier) external onlyOwner { sellFeeIncreaseFactor = _multiplier; } function setAuthOnDividends(address account) public onlyOwner{ cakeDividendTracker.setAuth(account); } function setLockTilStartEnabled(bool _enabled) external onlyOwner { if (lockUsed == false){ lockTilStart = _enabled; lockUsed = true; } else{ lockTilStart = false; } emit LockTilStartUpdated(lockTilStart); } function setCakeDividendEnabled(bool _enabled) external onlyOwner { require(cakeDividendEnabled != _enabled, "Can't set flag to same status"); if (_enabled == false) { previousCakeDividendRewardsFee = cakeDividendRewardsFee; cakeDividendRewardsFee = 0; cakeDividendEnabled = _enabled; } else { cakeDividendRewardsFee = previousCakeDividendRewardsFee; totalFees = cakeDividendRewardsFee.add(marketingFee).add(flojrDividendRewardsFee).add(liquidityFee); cakeDividendEnabled = _enabled; } emit CakeDividendEnabledUpdated(_enabled); } function setMarketingEnabled(bool _enabled) external onlyOwner { require(marketingEnabled != _enabled, "Can't set flag to same status"); if (_enabled == false) { previousMarketingFee = marketingFee; marketingFee = 0; marketingEnabled = _enabled; } else { marketingFee = previousMarketingFee; totalFees = marketingFee.add(devWalletFee).add(cakeDividendRewardsFee).add(liquidityFee); marketingEnabled = _enabled; } emit MarketingEnabledUpdated(_enabled); } function setSwapAndLiquifyEnabled(bool _enabled) external onlyOwner { require(swapAndLiquifyEnabled != _enabled, "Can't set flag to same status"); if (_enabled == false) { previousLiquidityFee = liquidityFee; liquidityFee = 0; swapAndLiquifyEnabled = _enabled; } else { liquidityFee = previousLiquidityFee; totalFees = devWalletFee.add(marketingFee).add(cakeiDividendRewardsFee).add(liquidityFee); swapAndLiquifyEnabled = _enabled; } emit SwapAndLiquifyEnabledUpdated(_enabled); } function updatecakeDividendTracker(address newAddress) external onlyOwner { require(newAddress != address(cakeDividendTracker), "EzCake: The dividend tracker already has that address"); CAKEDividendTracker newcakeDividendTracker = CAKEDividendTracker(payable(newAddress)); require(newcakeDividendTracker.owner() == address(this), "CAKE: The new dividend tracker must be owned by the Cake token contract"); newcakeDividendTracker.excludeFromDividends(address(newcakeDividendTracker)); newcakeDividendTracker.excludeFromDividends(address(this)); newcakeDividendTracker.excludeFromDividends(address(uniswapV2Router)); newcakeDividendTracker.excludeFromDividends(address(deadAddress)); emit updatecakeDividendTracker(newAddress, address(cakeDividendTracker)); cakeDividendTracker = newcakeDividendTracker; } function updateCakeDividendRewardFee(uint8 newFee) external onlyOwner { cakeiDividendRewardsFee = newFee; totalFees = cakeiDividendRewardsFee.add(marketingFee).add(devWalletFee).add(liquidityFee); } function updateMarketingFee(uint8 newFee) external onlyOwner { marketingFee = newFee; totalFees = marketingFee.add(cakeiDividendRewardsFee).add(devWalletFee).add(liquidityFee); } function updateLiquidityFee(uint8 newFee) external onlyOwner { liquidityFee = newFee; totalFees = marketingFee.add(cakeiDividendRewardsFee).add(devWalletFee).add(liquidityFee); } function updateUniswapV2Router(address newAddress) external onlyOwner { require(newAddress != address(uniswapV2Router), "CAKE: The router already has that address"); emit UpdateUniswapV2Router(newAddress, address(uniswapV2Router)); uniswapV2Router = IUniswapV2Router02(newAddress); } function excludeFromFees(address account, bool excluded) public onlyOwner { require(isExcludedFromFees[account] != excluded, "CAKE: Account is already exluded from fees"); isExcludedFromFees[account] = excluded; emit ExcludeFromFees(account, excluded); } function excludeFromDividend(address account) public onlyOwner { cakeDividendTracker.excludeFromDividends(address(account)); } function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) external onlyOwner { for(uint256 i = 0; i < accounts.length; i++) { isExcludedFromFees[accounts[i]] = excluded; } emit ExcludeMultipleAccountsFromFees(accounts, excluded); } function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner { require(pair != uniswapV2Pair, "EzCake: The PancakeSwap pair cannot be removed from automatedMarketMakerPairs"); _setAutomatedMarketMakerPair(pair, value); } function _setAutomatedMarketMakerPair(address pair, bool value) private onlyOwner { require(automatedMarketMakerPairs[pair] != value, "CAKE: Automated market maker pair is already set to that value"); automatedMarketMakerPairs[pair] = value; if(value) { cakeDividendTracker.excludeFromDividends(pair); } emit SetAutomatedMarketMakerPair(pair, value); } function updateGasForProcessing(uint256 newValue) external onlyOwner { require(newValue != gasForProcessing, "CAKE: Cannot update gasForProcessing to same value"); gasForProcessing = newValue; emit GasForProcessingUpdated(newValue, gasForProcessing); } function updateMinimumBalanceForDividends(uint256 newMinimumBalance) external onlyOwner { cakeDividendTracker.updateMinimumTokenBalanceForDividends(newMinimumBalance); flojrDividendTracker.updateMinimumTokenBalanceForDividends(newMinimumBalance); } function updateClaimWait(uint256 claimWait) external onlyOwner { cakeDividendTracker.updateClaimWait(claimWait); flojrDividendTracker.updateClaimWait(claimWait); } function getCakeClaimWait() external view returns(uint256) { return cakeDividendTracker.claimWait(); } function getFlojrClaimWait() external view returns(uint256) { return flojrDividendTracker.claimWait(); } function getTotalCakeDividendsDistributed() external view returns (uint256) { return cakeDividendTracker.totalDividendsDistributed(); } function getTotalFlojrDividendsDistributed() external view returns (uint256) { return flojrDividendTracker.totalDividendsDistributed(); } function getIsExcludedFromFees(address account) public view returns(bool) { return isExcludedFromFees[account]; } function withdrawableCakeDividendOf(address account) external view returns(uint256) { return cakeDividendTracker.withdrawableDividendOf(account); } function withdrawableFlojrDividendOf(address account) external view returns(uint256) { return flojrDividendTracker.withdrawableDividendOf(account); } function cakeDividendTokenBalanceOf(address account) external view returns (uint256) { return cakeDividendTracker.balanceOf(account); } function flojrDividendTokenBalanceOf(address account) external view returns (uint256) { return flojrDividendTracker.balanceOf(account); } function getAccountCakeDividendsInfo(address account) external view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { return cakeDividendTracker.getAccount(account); } function getAccountFlojrDividendsInfo(address account) external view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { return flojrDividendTracker.getAccount(account); } function getAccountCakeDividendsInfoAtIndex(uint256 index) external view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { return cakeDividendTracker.getAccountAtIndex(index); } function getAccountFlojrDividendsInfoAtIndex(uint256 index) external view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { return flojrDividendTracker.getAccountAtIndex(index); } function processDividendTracker(uint256 gas) external onlyOwner { (uint256 CakeIterations, uint256 CakeClaims, uint256 CakeLastProcessedIndex) = cakeDividendTracker.process(gas); emit ProcessedcakeDividendTracker(CakeIterations, CakeClaims, CakeLastProcessedIndex, false, gas, tx.origin); (uint256 flojrIterations, uint256 flojrClaims, uint256 flojrLastProcessedIndex) = flojrDividendTracker.process(gas); emit ProcessedflojrDividendTracker(flojrIterations, flojrClaims, flojrLastProcessedIndex, false, gas, tx.origin); } function claim() external { cakeDividendTracker.processAccount(payable(msg.sender), false); flojrDividendTracker.processAccount(payable(msg.sender), false); } function getLastCakeDividendProcessedIndex() external view returns(uint256) { return cakeDividendTracker.getLastProcessedIndex(); } function getLastFlojrDividendProcessedIndex() external view returns(uint256) { return flojrDividendTracker.getLastProcessedIndex(); } function getNumberOfcakeDividendTokenHolders() external view returns(uint256) { return cakeDividendTracker.getNumberOfTokenHolders(); } function getNumberOfFlojrDividendTokenHolders() external view returns(uint256) { return flojrDividendTracker.getNumberOfTokenHolders(); } function _transfer( address from, address to, uint256 amount ) internal override { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); require(lockTilStart != true || from == owner()); bool excludedAccount = isExcludedFromFees[from] || isExcludedFromFees[to]; if (to != address(0) && to != address(0xdead) && from != address(this) && to != address(this)) { if (from == uniswapV2Pair) { require(balanceOf(to).add(amount) <= maxWalletBalance, "Exceeds maximum wallet token amount."); } } uint256 contractTokenBalance = balanceOf(address(this)); bool canSwap = contractTokenBalance >= swapTokensAtAmount; if (!swapping && canSwap && from != uniswapV2Pair) { swapping = true; if (marketingEnabled) { uint256 initialBalance = address(this).balance; uint256 swapTokens = contractTokenBalance.div(totalFees).mul(marketingFee); swapTokensForBNB(swapTokens); uint256 marketingPortion = address(this).balance.sub(initialBalance); transferToWallet(payable(marketingWallet), marketingPortion); } if(swapAndLiquifyEnabled) { uint256 liqTokens = contractTokenBalance.div(totalFees).mul(liquidityFee); swapAndLiquify(liqTokens); } if (cakeDividendEnabled) { uint256 CakeTokens = contractTokenBalance.div(totalFees).mul(cakeiDividendRewardsFee); swapAndSendCakeDividends(cakeTokens); } } bool takeFee = !swapping && !excludedAccount; if(takeFee) { uint256 fees = amount.div(100).mul(totalFees); // if sell, multiply by 1.2 if(automatedMarketMakerPairs[to]) { fees = fees.div(100).mul(sellFeeIncreaseFactor); } amount = amount.sub(fees); super._transfer(from, address(this), fees); } super._transfer(from, to, amount); try cakeDividendTracker.setBalance(payable(from), balanceOf(from)) {} catch {} try cakeDividendTracker.setBalance(payable(to), balanceOf(to)) {} catch {} if(!swapping) { uint256 gas = gasForProcessing; try cakeDividendTracker.process(gas) returns (uint256 iterations, uint256 claims, uint256 lastProcessedIndex) { emit ProcessedcakeDividendTracker(iterations, claims, lastProcessedIndex, true, gas, tx.origin); } catch { } } } function swapAndLiquify(uint256 contractTokenBalance) private { // split the contract balance into halves uint256 half = contractTokenBalance.div(2); uint256 otherHalf = contractTokenBalance.sub(half); uint256 initialBalance = address(this).balance; swapTokensForBNB(half); uint256 newBalance = address(this).balance.sub(initialBalance); addLiquidity(otherHalf, newBalance); emit SwapAndLiquify(half, newBalance, otherHalf); } function addLiquidity(uint256 tokenAmount, uint256 bnbAmount) private { // approve token transfer to cover all possible scenarios _approve(address(this), address(uniswapV2Router), tokenAmount); // add the liquidity uniswapV2Router.addLiquidityETH{value: bnbAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable marketingWallet, block.timestamp ); } function swapTokensForBNB(uint256 tokenAmount) private { // generate the uniswap pair path of token -> weth address[] memory path = new address[](2); path[0] = address(this); path[1] = uniswapV2Router.WETH(); _approve(address(this), address(uniswapV2Router), tokenAmount); // make the swap uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // accept any amount of ETH path, address(this), block.timestamp ); } function swapTokensForDividendToken(uint256 _tokenAmount, address _recipient, address _dividendAddress) private { address[] memory path = new address[](3); path[0] = address(this); path[1] = uniswapV2Router.WETH(); path[2] = _dividendAddress; _approve(address(this), address(uniswapV2Router), _tokenAmount); // make the swap uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens( _tokenAmount, 0, // accept any amount of dividend token path, _recipient, block.timestamp ); } function swapAndSendCakeDividends(uint256 tokens) private { swapTokensForDividendToken(tokens, address(this), cakeDividendToken); uint256 cakeDividends = IERC20(cakeDividendToken).balanceOf(address(this)); transferDividends(cakeDividendToken, address(cakeDividendTracker), cakeDividendTracker, cakeDividendTracker); } function transferToWallet(address payable recipient, uint256 amount) private { uint256 mktng = amount; recipient.transfer(mktng); } function transferDividends(address dividendToken, address dividendTracker, DividendPayingToken dividendPayingTracker, uint256 amount) private { bool success = IERC20(dividendToken).transfer(dividendTracker, amount); if (success) { dividendPayingTracker.distributeDividends(amount); emit SendDividends(amount); } } } contract cakeDividendTracker is DividendPayingToken, Ownable { using SafeMath for uint256; using SafeMathInt for int256; using IterableMapping for IterableMapping.Map; IterableMapping.Map private tokenHoldersMap; uint256 public lastProcessedIndex; mapping (address => bool) public excludedFromDividends; mapping (address => uint256) public lastClaimTimes; uint256 public claimWait; uint256 public minimumTokenBalanceForDividends; event ExcludeFromDividends(address indexed account); event ClaimWaitUpdated(uint256 indexed newValue, uint256 indexed oldValue); event Claim(address indexed account, uint256 amount, bool indexed automatic); constructor() DividendPayingToken("EzCake_CAKE_Dividend_Tracker", "EzCake_CAKE_Dividend_Tracker", 0x0e09fabb73bd3ade0a17ecc321fd13a19e81ce82) { claimWait = 1800; minimumTokenBalanceForDividends = 2000000 * (10**18); //must hold 2000000+ tokens } function _transfer(address, address, uint256) pure internal override { require(false, "EzCake_CAKE_Dividend_Tracker: No transfers allowed"); } function withdrawDividend() pure public override { require(false, "EzCake_CAKE_Dividend_Tracker: withdrawDividend disabled. Use the 'claim' function on the main EzCake contract."); } function setDividendTokenAddress(address newToken) external override onlyOwner { dividendToken = newToken; } function updateMinimumTokenBalanceForDividends(uint256 _newMinimumBalance) external onlyOwner { require(_newMinimumBalance != minimumTokenBalanceForDividends, "New mimimum balance for dividend cannot be same as current minimum balance"); minimumTokenBalanceForDividends = _newMinimumBalance * (10**18); } function excludeFromDividends(address account) external onlyOwner { require(!excludedFromDividends[account]); excludedFromDividends[account] = true; _setBalance(account, 0); tokenHoldersMap.remove(account); emit ExcludeFromDividends(account); } function updateClaimWait(uint256 newClaimWait) external onlyOwner { require(newClaimWait >= 1800 && newClaimWait <= 86400, "EzCake_CAKE_Dividend_Tracker: claimWait must be updated to between 1 and 24 hours"); require(newClaimWait != claimWait, "EzCake_CAKE_Dividend_Tracker: Cannot update claimWait to same value"); emit ClaimWaitUpdated(newClaimWait, claimWait); claimWait = newClaimWait; } function getLastProcessedIndex() external view returns(uint256) { return lastProcessedIndex; } function getNumberOfTokenHolders() external view returns(uint256) { return tokenHoldersMap.keys.length; } function getAccount(address _account) public view returns ( address account, int256 index, int256 iterationsUntilProcessed, uint256 withdrawableDividends, uint256 totalDividends, uint256 lastClaimTime, uint256 nextClaimTime, uint256 secondsUntilAutoClaimAvailable) { account = _account; index = tokenHoldersMap.getIndexOfKey(account); iterationsUntilProcessed = -1; if(index >= 0) { if(uint256(index) > lastProcessedIndex) { iterationsUntilProcessed = index.sub(int256(lastProcessedIndex)); } else { uint256 processesUntilEndOfArray = tokenHoldersMap.keys.length > lastProcessedIndex ? tokenHoldersMap.keys.length.sub(lastProcessedIndex) : 0; iterationsUntilProcessed = index.add(int256(processesUntilEndOfArray)); } } withdrawableDividends = withdrawableDividendOf(account); totalDividends = accumulativeDividendOf(account); lastClaimTime = lastClaimTimes[account]; nextClaimTime = lastClaimTime > 0 ? lastClaimTime.add(claimWait) : 0; secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp ? nextClaimTime.sub(block.timestamp) : 0; } function getAccountAtIndex(uint256 index) public view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { if(index >= tokenHoldersMap.size()) { return (0x0000000000000000000000000000000000000000, -1, -1, 0, 0, 0, 0, 0); } address account = tokenHoldersMap.getKeyAtIndex(index); return getAccount(account); } function canAutoClaim(uint256 lastClaimTime) private view returns (bool) { if(lastClaimTime > block.timestamp) { return false; } return block.timestamp.sub(lastClaimTime) >= claimWait; } function setBalance(address payable account, uint256 newBalance) external onlyOwner { if(excludedFromDividends[account]) { return; } if(newBalance >= minimumTokenBalanceForDividends) { _setBalance(account, newBalance); tokenHoldersMap.set(account, newBalance); } else { _setBalance(account, 0); tokenHoldersMap.remove(account); } processAccount(account, true); } function process(uint256 gas) public returns (uint256, uint256, uint256) { uint256 numberOfTokenHolders = tokenHoldersMap.keys.length; if(numberOfTokenHolders == 0) { return (0, 0, lastProcessedIndex); } uint256 _lastProcessedIndex = lastProcessedIndex; uint256 gasUsed = 0; uint256 gasLeft = gasleft(); uint256 iterations = 0; uint256 claims = 0; while(gasUsed < gas && iterations < numberOfTokenHolders) { _lastProcessedIndex++; if(_lastProcessedIndex >= tokenHoldersMap.keys.length) { _lastProcessedIndex = 0; } address account = tokenHoldersMap.keys[_lastProcessedIndex]; if(canAutoClaim(lastClaimTimes[account])) { if(processAccount(payable(account), true)) { claims++; } } iterations++; uint256 newGasLeft = gasleft(); if(gasLeft > newGasLeft) { gasUsed = gasUsed.add(gasLeft.sub(newGasLeft)); } gasLeft = newGasLeft; } lastProcessedIndex = _lastProcessedIndex; return (iterations, claims, lastProcessedIndex); } function processAccount(address payable account, bool automatic) public onlyOwner returns (bool) { uint256 amount = _withdrawDividendOfUser(account); if(amount > 0) { lastClaimTimes[account] = block.timestamp; emit Claim(account, amount, automatic); return true; } return false; } } contract FLOJRDividendTracker is DividendPayingToken, Ownable { using SafeMath for uint256; using SafeMathInt for int256; using IterableMapping for IterableMapping.Map; IterableMapping.Map private tokenHoldersMap; uint256 public lastProcessedIndex; mapping (address => bool) public excludedFromDividends; mapping (address => uint256) public lastClaimTimes; uint256 public claimWait; uint256 public minimumTokenBalanceForDividends; event ExcludeFromDividends(address indexed account); event ClaimWaitUpdated(uint256 indexed newValue, uint256 indexed oldValue); event Claim(address indexed account, uint256 amount, bool indexed automatic); constructor() DividendPayingToken("EzCake_Dividend_Tracker", "EzCake_Dividend_Tracker", 0x338A09a17a7DA2E5c5a6B22344f3a49904224C79) { claimWait = 1800; minimumTokenBalanceForDividends = 2000000 * (10**18); //must hold 2000000+ tokens } function _transfer(address, address, uint256) pure internal override { require(false, "EzCake_Dividend_Tracker: No transfers allowed"); } function withdrawDividend() pure public override { require(false, "EzCake_Dividend_Tracker: withdrawDividend disabled. Use the 'claim' function on the main EzCake contract."); } function setDividendTokenAddress(address newToken) external override onlyOwner { dividendToken = newToken; } function updateMinimumTokenBalanceForDividends(uint256 _newMinimumBalance) external onlyOwner { require(_newMinimumBalance != minimumTokenBalanceForDividends, "New mimimum balance for dividend cannot be same as current minimum balance"); minimumTokenBalanceForDividends = _newMinimumBalance * (10**18); } function excludeFromDividends(address account) external onlyOwner { require(!excludedFromDividends[account]); excludedFromDividends[account] = true; _setBalance(account, 0); tokenHoldersMap.remove(account); emit ExcludeFromDividends(account); } function updateClaimWait(uint256 newClaimWait) external onlyOwner { require(newClaimWait >= 1800 && newClaimWait <= 86400, "EzCake_Dividend_Tracker: claimWait must be updated to between 1 and 24 hours"); require(newClaimWait != claimWait, "EzCake_Dividend_Tracker: Cannot update claimWait to same value"); emit ClaimWaitUpdated(newClaimWait, claimWait); claimWait = newClaimWait; } function getLastProcessedIndex() external view returns(uint256) { return lastProcessedIndex; } function getNumberOfTokenHolders() external view returns(uint256) { return tokenHoldersMap.keys.length; } function getAccount(address _account) public view returns ( address account, int256 index, int256 iterationsUntilProcessed, uint256 withdrawableDividends, uint256 totalDividends, uint256 lastClaimTime, uint256 nextClaimTime, uint256 secondsUntilAutoClaimAvailable) { account = _account; index = tokenHoldersMap.getIndexOfKey(account); iterationsUntilProcessed = -1; if(index >= 0) { if(uint256(index) > lastProcessedIndex) { iterationsUntilProcessed = index.sub(int256(lastProcessedIndex)); } else { uint256 processesUntilEndOfArray = tokenHoldersMap.keys.length > lastProcessedIndex ? tokenHoldersMap.keys.length.sub(lastProcessedIndex) : 0; iterationsUntilProcessed = index.add(int256(processesUntilEndOfArray)); } } withdrawableDividends = withdrawableDividendOf(account); totalDividends = accumulativeDividendOf(account); lastClaimTime = lastClaimTimes[account]; nextClaimTime = lastClaimTime > 0 ? lastClaimTime.add(claimWait) : 0; secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp ? nextClaimTime.sub(block.timestamp) : 0; } function getAccountAtIndex(uint256 index) public view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { if(index >= tokenHoldersMap.size()) { return (0x0000000000000000000000000000000000000000, -1, -1, 0, 0, 0, 0, 0); } address account = tokenHoldersMap.getKeyAtIndex(index); return getAccount(account); } function canAutoClaim(uint256 lastClaimTime) private view returns (bool) { if(lastClaimTime > block.timestamp) { return false; } return block.timestamp.sub(lastClaimTime) >= claimWait; } function setBalance(address payable account, uint256 newBalance) external onlyOwner { if(excludedFromDividends[account]) { return; } if(newBalance >= minimumTokenBalanceForDividends) { _setBalance(account, newBalance); tokenHoldersMap.set(account, newBalance); } else { _setBalance(account, 0); tokenHoldersMap.remove(account); } processAccount(account, true); } function process(uint256 gas) public returns (uint256, uint256, uint256) { uint256 numberOfTokenHolders = tokenHoldersMap.keys.length; if(numberOfTokenHolders == 0) { return (0, 0, lastProcessedIndex); } uint256 _lastProcessedIndex = lastProcessedIndex; uint256 gasUsed = 0; uint256 gasLeft = gasleft(); uint256 iterations = 0; uint256 claims = 0; while(gasUsed < gas && iterations < numberOfTokenHolders) { _lastProcessedIndex++; if(_lastProcessedIndex >= tokenHoldersMap.keys.length) { _lastProcessedIndex = 0; } address account = tokenHoldersMap.keys[_lastProcessedIndex]; if(canAutoClaim(lastClaimTimes[account])) { if(processAccount(payable(account), true)) { claims++; } } iterations++; uint256 newGasLeft = gasleft(); if(gasLeft > newGasLeft) { gasUsed = gasUsed.add(gasLeft.sub(newGasLeft)); } gasLeft = newGasLeft; } lastProcessedIndex = _lastProcessedIndex; return (iterations, claims, lastProcessedIndex); } function processAccount(address payable account, bool automatic) public onlyOwner returns (bool) { uint256 amount = _withdrawDividendOfUser(account); if(amount > 0) { lastClaimTimes[account] = block.timestamp; emit Claim(account, amount, automatic); return true; } return false; } }

@dev

/** *Submitted for verification at BscScan.com on 2021-09-13 */ pragma solidity 0.5.16; interface IBEP20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the token decimals. */ function decimals() external view returns (uint8); /** * @dev Returns the token symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the token name. */ function name() external view returns (string memory); /** * @dev Returns the bep token owner. */ function getOwner() external view returns (address); /** * @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: * ethereum/EIPs#20 (comment) * * 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); } /* * @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 GSN 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. */ contract Context { // Empty internal constructor, to prevent people from mistakenly deploying // an instance of this contract, which should be used via inheritance. constructor () internal { } function _msgSender() internal view returns (address payable) { return msg.sender; } function _msgData() internal view returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see ethereum/solidity#2691 return msg.data; } } /** * @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, 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: OpenZeppelin/openzeppelin-contracts#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) { // Solidity only automatically asserts when dividing by 0 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; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts 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) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } /** * @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. */ 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 () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @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 == _msgSender(), "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 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 onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } contract BEP20Token is Context, IBEP20, Ownable { using SafeMath for uint256; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; uint8 private _decimals; string private _symbol; string private _name; constructor() public { _name = " CryptoSocialPlatform "; _symbol = " CSP "; _decimals = 18; _totalSupply = 888888888000000000000000000; _balances[msg.sender] = _totalSupply; emit Transfer(address(0), msg.sender, _totalSupply); } /** * @dev Returns the bep token owner. */ function getOwner() external view returns (address) { return owner(); } /** * @dev Returns the token decimals. */ function decimals() external view returns (uint8) { return _decimals; } /** * @dev Returns the token symbol. */ function symbol() external view returns (string memory) { return _symbol; } /** * @dev Returns the token name. */ function name() external view returns (string memory) { return _name; } /** * @dev See {BEP20-totalSupply}. */ function totalSupply() external view returns (uint256) { return _totalSupply; } /** * @dev See {BEP20-balanceOf}. */ function balanceOf(address account) external view returns (uint256) { return _balances[account]; } /** * @dev See {BEP20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) external returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {BEP20-allowance}. */ function allowance(address owner, address spender) external view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {BEP20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) external returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {BEP20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {BEP20}; * * 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) external returns (bool) { _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: transfer amount exceeds allowance")); 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 {BEP20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(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 {BEP20-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 returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero")); return true; } /** * @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing * the total supply. * * Requirements * * - `msg.sender` must be the token owner */ function mint(uint256 amount) public onlyOwner returns (bool) { _mint(_msgSender(), amount); 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 { require(sender != address(0), "BEP20: transfer from the zero address"); require(recipient != address(0), "BEP20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(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 { require(account != address(0), "BEP20: mint to the zero address"); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(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 { require(account != address(0), "BEP20: burn from the zero address"); _balances[account] = _balances[account].sub(amount, "BEP20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is 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 { require(owner != address(0), "BEP20: approve from the zero address"); require(spender != address(0), "BEP20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Destroys `amount` tokens from `account`.`amount` is then deducted * from the caller's allowance. * * See {_burn} and {_approve}. */ function _burnFrom(address account, uint256 amount) internal { _burn(account, amount); _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "BEP20: burn amount exceeds allowance")); } }

//SPDX-License-Identifier: Unlicensed pragma solidity ^0.8.0; abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } } contract Ownable is Context { address private _owner; address private _previousOwner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @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 == _msgSender(), "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; } } 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); } 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); } contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default 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_) { _name = name_; _symbol = symbol_; } /** * @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 9; } /** * @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"); unchecked { _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"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This 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"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(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: * * - `account` 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); _afterTokenTransfer(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"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(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 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 {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} } library SafeMathUint { function toInt256Safe(uint256 a) internal pure returns (int256) { int256 b = int256(a); require(b >= 0); return b; } } library SafeMathInt { function mul(int256 a, int256 b) internal pure returns (int256) { // Prevent overflow when multiplying INT256_MIN with -1 // https://github.com/RequestNetwork/requestNetwork/issues/43 require(!(a == - 2**255 && b == -1) && !(b == - 2**255 && a == -1)); int256 c = a * b; require((b == 0) || (c / b == a)); return c; } function div(int256 a, int256 b) internal pure returns (int256) { // Prevent overflow when dividing INT256_MIN by -1 // https://github.com/RequestNetwork/requestNetwork/issues/43 require(!(a == - 2**255 && b == -1) && (b > 0)); return a / b; } function sub(int256 a, int256 b) internal pure returns (int256) { require((b >= 0 && a - b <= a) || (b < 0 && a - b > a)); return a - b; } function add(int256 a, int256 b) internal pure returns (int256) { int256 c = a + b; require((b >= 0 && c >= a) || (b < 0 && c < a)); return c; } function toUint256Safe(int256 a) internal pure returns (uint256) { require(a >= 0); return uint256(a); } } 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) { unchecked { 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) { unchecked { 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) { unchecked { // 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) { unchecked { 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) { unchecked { 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) { return a + b; } /** * @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 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) { return a * b; } /** * @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. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { 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) { 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) { unchecked { 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. * * 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) { unchecked { 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) { unchecked { require(b > 0, errorMessage); return a % b; } } } library IterableMapping { // Iterable mapping from address to uint; struct Map { address[] keys; mapping(address => uint) values; mapping(address => uint) indexOf; mapping(address => bool) inserted; } function get(Map storage map, address key) public view returns (uint) { return map.values[key]; } function getIndexOfKey(Map storage map, address key) public view returns (int) { if(!map.inserted[key]) { return -1; } return int(map.indexOf[key]); } function getKeyAtIndex(Map storage map, uint index) public view returns (address) { return map.keys[index]; } function size(Map storage map) public view returns (uint) { return map.keys.length; } function set(Map storage map, address key, uint val) public { if (map.inserted[key]) { map.values[key] = val; } else { map.inserted[key] = true; map.values[key] = val; map.indexOf[key] = map.keys.length; map.keys.push(key); } } function remove(Map storage map, address key) public { if (!map.inserted[key]) { return; } delete map.inserted[key]; delete map.values[key]; uint index = map.indexOf[key]; uint lastIndex = map.keys.length - 1; address lastKey = map.keys[lastIndex]; map.indexOf[lastKey] = index; delete map.indexOf[key]; map.keys[index] = lastKey; map.keys.pop(); } } interface DividendPayingTokenOptionalInterface { function withdrawableDividendOf(address _owner) external view returns(uint256); function withdrawnDividendOf(address _owner) external view returns(uint256); function accumulativeDividendOf(address _owner) external view returns(uint256); } interface DividendPayingTokenInterface { function dividendOf(address _owner) external view returns(uint256); function distributeDividends() external payable; function withdrawDividend() external; event DividendsDistributed(address indexed from, uint256 weiAmount); event DividendWithdrawn(address indexed to, uint256 weiAmount); } /// @title Dividend-Paying Token /// @author Roger Wu (https://github.com/roger-wu) /// @dev A mintable ERC20 token that allows anyone to pay and distribute ether /// to token holders as dividends and allows token holders to withdraw their dividends. /// Reference: the source code of PoWH3D: https://etherscan.io/address/0xB3775fB83F7D12A36E0475aBdD1FCA35c091efBe#code contract DividendPayingToken is ERC20, DividendPayingTokenInterface, DividendPayingTokenOptionalInterface { using SafeMath for uint256; using SafeMathUint for uint256; using SafeMathInt for int256; // With `magnitude`, we can properly distribute dividends even if the amount of received ether is small. // For more discussion about choosing the value of `magnitude`, // see https://github.com/ethereum/EIPs/issues/1726#issuecomment-472352728 uint256 constant internal magnitude = 2**128; uint256 internal magnifiedDividendPerShare; // About dividendCorrection: // If the token balance of a `_user` is never changed, the dividend of `_user` can be computed with: // `dividendOf(_user) = dividendPerShare * balanceOf(_user)`. // When `balanceOf(_user)` is changed (via minting/burning/transferring tokens), // `dividendOf(_user)` should not be changed, // but the computed value of `dividendPerShare * balanceOf(_user)` is changed. // To keep the `dividendOf(_user)` unchanged, we add a correction term: // `dividendOf(_user) = dividendPerShare * balanceOf(_user) + dividendCorrectionOf(_user)`, // where `dividendCorrectionOf(_user)` is updated whenever `balanceOf(_user)` is changed: // `dividendCorrectionOf(_user) = dividendPerShare * (old balanceOf(_user)) - (new balanceOf(_user))`. // So now `dividendOf(_user)` returns the same value before and after `balanceOf(_user)` is changed. mapping(address => int256) internal magnifiedDividendCorrections; mapping(address => uint256) internal withdrawnDividends; uint256 public totalDividendsDistributed; constructor(string memory _name, string memory _symbol) ERC20(_name, _symbol) { } /// @dev Distributes dividends whenever ether is paid to this contract. receive() external payable { distributeDividends(); } /// @notice Distributes ether to token holders as dividends. /// @dev It reverts if the total supply of tokens is 0. /// It emits the `DividendsDistributed` event if the amount of received ether is greater than 0. /// About undistributed ether: /// In each distribution, there is a small amount of ether not distributed, /// the magnified amount of which is /// `(msg.value * magnitude) % totalSupply()`. /// With a well-chosen `magnitude`, the amount of undistributed ether /// (de-magnified) in a distribution can be less than 1 wei. /// We can actually keep track of the undistributed ether in a distribution /// and try to distribute it in the next distribution, /// but keeping track of such data on-chain costs much more than /// the saved ether, so we don't do that. function distributeDividends() public override payable { require(totalSupply() > 0); if (msg.value > 0) { magnifiedDividendPerShare = magnifiedDividendPerShare.add( (msg.value).mul(magnitude) / totalSupply() ); emit DividendsDistributed(msg.sender, msg.value); totalDividendsDistributed = totalDividendsDistributed.add(msg.value); } } /// @notice Withdraws the ether distributed to the sender. /// @dev It emits a `DividendWithdrawn` event if the amount of withdrawn ether is greater than 0. function withdrawDividend() public virtual override { _withdrawDividendOfUser(payable(msg.sender)); } /// @notice Withdraws the ether distributed to the sender. /// @dev It emits a `DividendWithdrawn` event if the amount of withdrawn ether is greater than 0. function _withdrawDividendOfUser(address payable user) internal returns (uint256) { uint256 _withdrawableDividend = withdrawableDividendOf(user); if (_withdrawableDividend > 0) { withdrawnDividends[user] = withdrawnDividends[user].add(_withdrawableDividend); emit DividendWithdrawn(user, _withdrawableDividend); (bool success,) = user.call{value: _withdrawableDividend, gas: 3000}(""); if(!success) { withdrawnDividends[user] = withdrawnDividends[user].sub(_withdrawableDividend); return 0; } return _withdrawableDividend; } return 0; } /// @notice View the amount of dividend in wei that an address can withdraw. /// @param _owner The address of a token holder. /// @return The amount of dividend in wei that `_owner` can withdraw. function dividendOf(address _owner) public view override returns(uint256) { return withdrawableDividendOf(_owner); } /// @notice View the amount of dividend in wei that an address can withdraw. /// @param _owner The address of a token holder. /// @return The amount of dividend in wei that `_owner` can withdraw. function withdrawableDividendOf(address _owner) public view override returns(uint256) { return accumulativeDividendOf(_owner).sub(withdrawnDividends[_owner]); } /// @notice View the amount of dividend in wei that an address has withdrawn. /// @param _owner The address of a token holder. /// @return The amount of dividend in wei that `_owner` has withdrawn. function withdrawnDividendOf(address _owner) public view override returns(uint256) { return withdrawnDividends[_owner]; } /// @notice View the amount of dividend in wei that an address has earned in total. /// @dev accumulativeDividendOf(_owner) = withdrawableDividendOf(_owner) + withdrawnDividendOf(_owner) /// = (magnifiedDividendPerShare * balanceOf(_owner) + magnifiedDividendCorrections[_owner]) / magnitude /// @param _owner The address of a token holder. /// @return The amount of dividend in wei that `_owner` has earned in total. function accumulativeDividendOf(address _owner) public view override returns(uint256) { return magnifiedDividendPerShare.mul(balanceOf(_owner)).toInt256Safe() .add(magnifiedDividendCorrections[_owner]).toUint256Safe() / magnitude; } /// @dev Internal function that transfer tokens from one address to another. /// Update magnifiedDividendCorrections to keep dividends unchanged. /// @param from The address to transfer from. /// @param to The address to transfer to. /// @param value The amount to be transferred. function _transfer(address from, address to, uint256 value) internal virtual override { require(false); int256 _magCorrection = magnifiedDividendPerShare.mul(value).toInt256Safe(); magnifiedDividendCorrections[from] = magnifiedDividendCorrections[from].add(_magCorrection); magnifiedDividendCorrections[to] = magnifiedDividendCorrections[to].sub(_magCorrection); } /// @dev Internal function that mints tokens to an account. /// Update magnifiedDividendCorrections to keep dividends unchanged. /// @param account The account that will receive the created tokens. /// @param value The amount that will be created. function _mint(address account, uint256 value) internal override { super._mint(account, value); magnifiedDividendCorrections[account] = magnifiedDividendCorrections[account] .sub( (magnifiedDividendPerShare.mul(value)).toInt256Safe() ); } /// @dev Internal function that burns an amount of the token of a given account. /// Update magnifiedDividendCorrections to keep dividends unchanged. /// @param account The account whose tokens will be burnt. /// @param value The amount that will be burnt. function _burn(address account, uint256 value) internal override { super._burn(account, value); magnifiedDividendCorrections[account] = magnifiedDividendCorrections[account] .add( (magnifiedDividendPerShare.mul(value)).toInt256Safe() ); } function _setBalance(address account, uint256 newBalance) internal { uint256 currentBalance = balanceOf(account); if(newBalance > currentBalance) { uint256 mintAmount = newBalance.sub(currentBalance); _mint(account, mintAmount); } else if(newBalance < currentBalance) { uint256 burnAmount = currentBalance.sub(newBalance); _burn(account, burnAmount); } } } contract ZillaPigDividendTracker is DividendPayingToken, Ownable { using SafeMath for uint256; using SafeMathInt for int256; using IterableMapping for IterableMapping.Map; IterableMapping.Map private tokenHoldersMap; uint256 public lastProcessedIndex; mapping (address => bool) public excludedFromDividends; mapping (address => uint256) public lastClaimTimes; uint256 public claimWait; uint256 public minimumTokenBalanceForDividends; event ExcludeFromDividends(address indexed account); event ClaimWaitUpdated(uint256 indexed newValue, uint256 indexed oldValue); event UpdateDistributionBalanceOfUser(address account, uint256 newBalance); event Claim(address indexed account, uint256 amount, bool indexed automatic); constructor() DividendPayingToken("ZillaPigDividendTracker", "ZillaDoge_DividendTracker") { claimWait = 3600; minimumTokenBalanceForDividends = 10000 * (10**decimals()); //must hold 10000+ tokens } function _transfer(address, address, uint256) internal pure override { require(false, "ZillaDogeDividendTracker: No transfers allowed"); } function withdrawDividend() public pure override { require(false, "ZillaPigDividendTracker: withdrawDividend disabled. Use the 'claim' function on the main ZillaPig contract."); } function excludeFromDividends(address account) external onlyOwner { require(!excludedFromDividends[account]); excludedFromDividends[account] = true; _setBalance(account, 0); tokenHoldersMap.remove(account); emit ExcludeFromDividends(account); } function updateClaimWait(uint256 newClaimWait) external onlyOwner { emit ClaimWaitUpdated(newClaimWait, claimWait); claimWait = newClaimWait; } function updateMinimumTokenBalanceForDividends(uint256 newTokenBalance) external onlyOwner { emit ClaimWaitUpdated(newTokenBalance, minimumTokenBalanceForDividends); minimumTokenBalanceForDividends = newTokenBalance; } function getLastProcessedIndex() external view returns(uint256) { return lastProcessedIndex; } function getNumberOfTokenHolders() external view returns(uint256) { return tokenHoldersMap.keys.length; } function getAccount(address _account) public view returns ( address account, int256 index, int256 iterationsUntilProcessed, uint256 withdrawableDividends, uint256 totalDividends, uint256 lastClaimTime, uint256 nextClaimTime, uint256 secondsUntilAutoClaimAvailable) { account = _account; index = tokenHoldersMap.getIndexOfKey(account); iterationsUntilProcessed = -1; if(index >= 0) { if(uint256(index) > lastProcessedIndex) { iterationsUntilProcessed = index.sub(int256(lastProcessedIndex)); } else { uint256 processesUntilEndOfArray = tokenHoldersMap.keys.length > lastProcessedIndex ? tokenHoldersMap.keys.length.sub(lastProcessedIndex) : 0; iterationsUntilProcessed = index.add(int256(processesUntilEndOfArray)); } } withdrawableDividends = withdrawableDividendOf(account); totalDividends = accumulativeDividendOf(account); lastClaimTime = lastClaimTimes[account]; nextClaimTime = lastClaimTime > 0 ? lastClaimTime.add(claimWait) : 0; secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp ? nextClaimTime.sub(block.timestamp) : 0; } function getAccountAtIndex(uint256 index) public view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { if(index >= tokenHoldersMap.size()) { return (0x0000000000000000000000000000000000000000, -1, -1, 0, 0, 0, 0, 0); } address account = tokenHoldersMap.getKeyAtIndex(index); return getAccount(account); } function canAutoClaim(uint256 lastClaimTime) private view returns (bool) { if(lastClaimTime > block.timestamp) { return false; } return block.timestamp.sub(lastClaimTime) >= claimWait; } function setBalance(address payable account, uint256 newBalance) external onlyOwner { if(excludedFromDividends[account]) { return; } if(newBalance >= minimumTokenBalanceForDividends) { _setBalance(account, newBalance); tokenHoldersMap.set(account, newBalance); } else { _setBalance(account, 0); tokenHoldersMap.remove(account); } emit UpdateDistributionBalanceOfUser(account, newBalance); processAccount(account, true); } function process(uint256 gas) public returns (uint256, uint256, uint256) { uint256 numberOfTokenHolders = tokenHoldersMap.keys.length; if(numberOfTokenHolders == 0) { return (0, 0, lastProcessedIndex); } uint256 _lastProcessedIndex = lastProcessedIndex; uint256 gasUsed = 0; uint256 gasLeft = gasleft(); uint256 iterations = 0; uint256 claims = 0; while(gasUsed < gas && iterations < numberOfTokenHolders) { _lastProcessedIndex++; if(_lastProcessedIndex >= tokenHoldersMap.keys.length) { _lastProcessedIndex = 0; } address account = tokenHoldersMap.keys[_lastProcessedIndex]; if(canAutoClaim(lastClaimTimes[account])) { if(processAccount(payable(account), true)) { claims++; } } iterations++; uint256 newGasLeft = gasleft(); if(gasLeft > newGasLeft) { gasUsed = gasUsed.add(gasLeft.sub(newGasLeft)); } gasLeft = newGasLeft; } lastProcessedIndex = _lastProcessedIndex; return (iterations, claims, lastProcessedIndex); } function processAccount(address payable account, bool automatic) public onlyOwner returns (bool) { uint256 amount = _withdrawDividendOfUser(account); if(amount > 0) { lastClaimTimes[account] = block.timestamp; emit Claim(account, amount, automatic); return true; } return false; } } interface IPancakeFactory { event PairCreated(address indexed token0, address indexed token1, address pair, uint); function feeTo() external view returns (address); function feeToSetter() external view returns (address); function getPair(address tokenA, address tokenB) external view returns (address pair); function allPairs(uint) external view returns (address pair); function allPairsLength() external view returns (uint); function createPair(address tokenA, address tokenB) external returns (address pair); function setFeeTo(address) external; function setFeeToSetter(address) external; } interface IPancakePair { event Approval(address indexed owner, address indexed spender, uint value); event Transfer(address indexed from, address indexed to, uint value); function name() external pure returns (string memory); function symbol() external pure returns (string memory); function decimals() external pure returns (uint256); function totalSupply() external view returns (uint); function balanceOf(address owner) external view returns (uint); function allowance(address owner, address spender) external view returns (uint); function approve(address spender, uint value) external returns (bool); function transfer(address to, uint value) external returns (bool); function transferFrom(address from, address to, uint value) external returns (bool); function DOMAIN_SEPARATOR() external view returns (bytes32); function PERMIT_TYPEHASH() external pure returns (bytes32); function nonces(address owner) external view returns (uint); function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external; event Mint(address indexed sender, uint amount0, uint amount1); event Burn(address indexed sender, uint amount0, uint amount1, address indexed to); event Swap( address indexed sender, uint amount0In, uint amount1In, uint amount0Out, uint amount1Out, address indexed to ); event Sync(uint112 reserve0, uint112 reserve1); function MINIMUM_LIQUIDITY() external pure returns (uint); function factory() external view returns (address); function token0() external view returns (address); function token1() external view returns (address); function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast); function price0CumulativeLast() external view returns (uint); function price1CumulativeLast() external view returns (uint); function kLast() external view returns (uint); function mint(address to) external returns (uint liquidity); function burn(address to) external returns (uint amount0, uint amount1); function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external; function skim(address to) external; function sync() external; function initialize(address, address) external; } interface IPancakeRouter01 { function factory() external pure returns (address); function WETH() external pure returns (address); function addLiquidity( address tokenA, address tokenB, uint amountADesired, uint amountBDesired, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB, uint liquidity); function addLiquidityETH( address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external payable returns (uint amountToken, uint amountETH, uint liquidity); function removeLiquidity( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline ) external returns (uint amountA, uint amountB); function removeLiquidityETH( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountToken, uint amountETH); function removeLiquidityWithPermit( address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountA, uint amountB); function removeLiquidityETHWithPermit( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountToken, uint amountETH); function swapExactTokensForTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapTokensForExactTokens( uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline ) external returns (uint[] memory amounts); function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external returns (uint[] memory amounts); function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline) external payable returns (uint[] memory amounts); function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB); function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut); function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn); function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts); function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts); } interface IPancakeRouter02 is IPancakeRouter01 { function removeLiquidityETHSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline ) external returns (uint amountETH); function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens( address token, uint liquidity, uint amountTokenMin, uint amountETHMin, address to, uint deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s ) external returns (uint amountETH); function swapExactTokensForTokensSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; function swapExactETHForTokensSupportingFeeOnTransferTokens( uint amountOutMin, address[] calldata path, address to, uint deadline ) external payable; function swapExactTokensForETHSupportingFeeOnTransferTokens( uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline ) external; } contract ZillaPig is ERC20, Ownable { using SafeMath for uint256; IPancakeRouter02 public pancakeRouter; address public pancakePair; bool private swapping; ZillaPigDividendTracker public dividendTracker; address public marketingWallet = 0xccB8dE5880a19A88e8280336021CAF073B240526; address public buybackWallet = 0x732df81dd416776ba1d42117389835DEc7d8bC10; uint256 public maxTransactionAmount; uint256 public maxHoldingAmount; uint256 public swapTokensAtAmount = 10000 * (10**decimals()); uint256 public buyback = 4; uint256 public marketingFee = 6; uint256 public dividendFee = 5; uint256 public sellBuybackFee = 5; uint256 public sellMarketingFee = 7; uint256 public sellDividendFee = 6; uint256 public accBuybackFee = 1; uint256 public accMarketingFee = 1; uint256 public accDividendFee = 1; // use by default 300,000 gas to process auto-claiming dividends uint256 public gasForProcessing = 300000; /********* TX LIMITS *********/ mapping (address => uint256) public accountLastPeriodSellVolume; uint256 public restrictionPeriod = 24 hours; struct Sell { uint256 time; uint256 amount; } mapping (address => Sell[]) public accountSells; /****************/ bool public tradingEnabled = true; bool public swappingEnabled = true; event UpdateSwappingStatus(bool status); event UpdateTradingStatus(bool status); // exlcude from fees and max transaction amount mapping (address => bool) private _isExcludedFromFees; mapping (address => bool) private _isExcludedFromPeriodLimit; mapping (address => bool) private _isExcludedFromMaxTxLimit; mapping (address => bool) private _isExcludedFromMaxHoldLimit; // addresses that can make transfers before trading is enabled mapping (address => bool) private canTransferBeforeTradingIsEnabled; event UpdateDividendTracker(address indexed newAddress, address indexed oldAddress); event UpdateWallets(address oldMarketing, address newMarketing, address oldBuyback, address newBuyback); event UpdatePancakeRouter(address indexed newAddress, address indexed oldAddress); event ExcludeFromFees(address indexed account, bool isExcluded); event ExcludeFromPeriodLimit(address indexed account, bool isExcluded); event ExcludeFromMaxTxLimit(address indexed account, bool isExcluded); event ExcludeMultipleAccountsFromFees(address[] accounts, bool isExcluded); event GasForProcessingUpdated(uint256 indexed newValue, uint256 indexed oldValue); event SetBuyFees(uint256 BuybackFee, uint256 MarketingFee, uint256 DividendFee); event SetSellFees(uint256 SellBuybackFee, uint256 SellMarketingFee, uint256 SellDividendFee); event SetRestrictionPeriod(uint256 OldPeriod, uint256 NewPeriod); event SetMaxTxAmount(uint256 OldPercent, uint256 NewPercent); event SetSwapTokensAtAmount(uint256 OldAmount, uint256 NewAmount); event SetMaxHoldingAmount(uint256 OldPercent, uint256 NewPercent); // events for last sell event UpdateaAccountLastPeriodSellVolume(uint256 oldValue, uint256 newValue); event AddLastPeriodSellInfo(uint256 timestamp, uint256 amount); event StartSwapTokensForEth(uint256 tokenAmountToBeSwapped); event FinishSwapTokensForEth(uint256 ethAmountSwapped); event CalculatedBNBForEachRecipient(uint256 forMarketing, uint256 forBuyback, uint256 forDividends); event ErrorInProcess(address msgSender); event SwapAndSendTo( uint256 tokensSwapped, uint256 amount, string to ); event ProcessedDividendTracker( uint256 iterations, uint256 claims, uint256 lastProcessedIndex, bool indexed automatic, uint256 gas, address indexed processor ); constructor() ERC20("ZillaPig Token", "ZillaPig") { dividendTracker = new ZillaPigDividendTracker(); updatePancakeRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E); // bscmainnet // updatePancakeRouter(0xD99D1c33F9fC3444f8101754aBC46c52416550D1); // bsctestnet // exclude from receiving dividends dividendTracker.excludeFromDividends(address(dividendTracker)); dividendTracker.excludeFromDividends(address(this)); dividendTracker.excludeFromDividends(address(0)); _isExcludedFromMaxHoldLimit[address(0)] = true; excludeFromAllLimits(owner(), true); excludeFromAllLimits(address(this), true); canTransferBeforeTradingIsEnabled[owner()] = true; /* _mint is an internal function in ERC20.sol that is only called here, and CANNOT be called ever again */ _mint(owner(), 69 * 10**21 * (10**decimals())); maxTransactionAmount = totalSupply().div(100); maxHoldingAmount = totalSupply().div(100); } function updatePancakeRouter(address newAddress) public onlyOwner { require(newAddress != address(pancakeRouter), "ZillaPig: The router already has that address"); emit UpdatePancakeRouter(newAddress, address(pancakeRouter)); pancakeRouter = IPancakeRouter02(newAddress); address _pancakePair = IPancakeFactory(pancakeRouter.factory()) .createPair(address(this), pancakeRouter.WETH()); pancakePair = _pancakePair; dividendTracker.excludeFromDividends(address(pancakeRouter)); dividendTracker.excludeFromDividends(pancakePair); excludeFromAllLimits(newAddress, true); _isExcludedFromPeriodLimit[pancakePair] = true; _isExcludedFromMaxHoldLimit[pancakePair] = true; } receive() external payable { } function excludeFromAllLimits(address account, bool status) public onlyOwner { _isExcludedFromFees[account] = status; _isExcludedFromMaxTxLimit[account] = status; _isExcludedFromPeriodLimit[account] = status; _isExcludedFromMaxHoldLimit[account] = status; } function setSwapTokensAtAmount(uint256 amount) external onlyOwner { emit SetSwapTokensAtAmount(swapTokensAtAmount, amount); swapTokensAtAmount = amount; } function setMaxTxAmount(uint256 amount) external onlyOwner { emit SetMaxTxAmount(maxTransactionAmount, amount); maxTransactionAmount = amount; } function setMaxHoldingAmount(uint256 amount) external onlyOwner { emit SetMaxHoldingAmount(maxHoldingAmount, amount); maxHoldingAmount = amount; } function setRestrictionPeriod(uint256 _newPeriodHours) external onlyOwner { emit SetRestrictionPeriod(restrictionPeriod, _newPeriodHours); restrictionPeriod = _newPeriodHours*1 hours; } function getAccountPeriodSellVolume(address account) public returns(uint256) { uint256 offset; uint256 newVolume = accountLastPeriodSellVolume[account]; for (uint256 i = 0; i < accountSells[account].length; i++) { if (block.timestamp.sub(accountSells[account][i].time) <= restrictionPeriod) { break; } if (newVolume > 0) { newVolume = newVolume.sub(accountSells[account][i].amount); offset++; } } if (offset > 0) { removeAccSells(account, offset); } if (accountLastPeriodSellVolume[account] != newVolume) { emit UpdateaAccountLastPeriodSellVolume(accountLastPeriodSellVolume[account], newVolume); accountLastPeriodSellVolume[account] = newVolume; } return newVolume; } function removeAccSells(address account, uint256 offset) private { for (uint256 i = 0; i < accountSells[account].length-offset; i++) { accountSells[account][i] = accountSells[account][i+offset]; } for (uint256 i = 0; i < offset; i++) { accountSells[account].pop(); } } function getAccountSells (address account, uint256 i) public view returns (uint256, uint256) { return (accountSells[account][i].time, accountSells[account][i].amount); } function setBuyFees(uint256 _BuybackFee, uint256 _MarketingFee, uint256 _DividendFee) external onlyOwner { buyback = _BuybackFee; marketingFee = _MarketingFee; dividendFee = _DividendFee; uint256 totalFees = buyback + marketingFee + dividendFee; require(totalFees < 51, "Too much"); emit SetBuyFees(_BuybackFee, _MarketingFee, _DividendFee); } function setSellFees(uint256 _SellBuybackFee, uint256 _SellMarketingFee, uint256 _SellDividendFee) external onlyOwner { sellBuybackFee = _SellBuybackFee; sellMarketingFee = _SellMarketingFee; sellDividendFee = _SellDividendFee; uint256 totalFees = sellBuybackFee + sellMarketingFee + sellDividendFee; require(totalFees < 51, "Too much"); emit SetSellFees(_SellBuybackFee, _SellMarketingFee, _SellDividendFee); } function setWallets(address newMarketingWallet, address newBuybackWallet) external onlyOwner { require(newBuybackWallet != address(0), 'Buyback Zero address'); require(newMarketingWallet != address(0), 'Marketing Zero address'); emit UpdateWallets(marketingWallet, newMarketingWallet, buybackWallet, newBuybackWallet); marketingWallet = newMarketingWallet; buybackWallet = newBuybackWallet; } function setCanTransferBeforeTradingIsEnabled(address account, bool status) external onlyOwner { canTransferBeforeTradingIsEnabled[account] = status; } function excludeFromDividends(address account) external onlyOwner { dividendTracker.excludeFromDividends(account); } function isExcludedFromDividends(address account) external view returns (bool){ return dividendTracker.excludedFromDividends(account); } function updateDividendTracker(address newAddress) public onlyOwner { require(newAddress != address(dividendTracker), "ZillaPig: The dividend tracker already has that address"); ZillaPigDividendTracker newDividendTracker = ZillaPigDividendTracker(payable(newAddress)); require(newDividendTracker.owner() == address(this), "ZillaPig: The new dividend tracker must be owned by the ZillaPig token contract"); newDividendTracker.excludeFromDividends(address(newDividendTracker)); newDividendTracker.excludeFromDividends(address(this)); newDividendTracker.excludeFromDividends(address(pancakeRouter)); emit UpdateDividendTracker(newAddress, address(dividendTracker)); dividendTracker = newDividendTracker; } function excludeFromFees(address account, bool excluded) public onlyOwner { require(_isExcludedFromFees[account] != excluded, "ZillaPig: Account is already the value of 'excluded'"); _isExcludedFromFees[account] = excluded; emit ExcludeFromFees(account, excluded); } function excludeFromPeriodLimit(address account, bool excluded) public onlyOwner { require(_isExcludedFromPeriodLimit[account] != excluded, "ZillaPig: Account is already the value of 'excluded'"); _isExcludedFromPeriodLimit[account] = excluded; emit ExcludeFromPeriodLimit(account, excluded); } function excludeFromMaxTxLimit(address account, bool excluded) public onlyOwner { require(_isExcludedFromMaxTxLimit[account] != excluded, "ZillaPig: Account is already the value of 'excluded'"); _isExcludedFromMaxTxLimit[account] = excluded; emit ExcludeFromMaxTxLimit(account, excluded); } function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner { for(uint256 i = 0; i < accounts.length; i++) { _isExcludedFromFees[accounts[i]] = excluded; } emit ExcludeMultipleAccountsFromFees(accounts, excluded); } function updateGasForProcessing(uint256 newValue) public onlyOwner { require(newValue >= 200000 && newValue <= 500000, "ZillaPig: gasForProcessing must be between 200,000 and 500,000"); require(newValue != gasForProcessing, "ZillaPig: Cannot update gasForProcessing to same value"); emit GasForProcessingUpdated(newValue, gasForProcessing); gasForProcessing = newValue; } function updateClaimWait(uint256 claimWait) external onlyOwner { dividendTracker.updateClaimWait(claimWait); } function updateMinimumTokenBalanceForDividends(uint256 newTokenBalance) external onlyOwner { dividendTracker.updateMinimumTokenBalanceForDividends(newTokenBalance); } function getClaimWait() external view returns(uint256) { return dividendTracker.claimWait(); } function getTotalDividendsDistributed() external view returns (uint256) { return dividendTracker.totalDividendsDistributed(); } function isExcludedFromFees(address account) public view returns(bool) { return _isExcludedFromFees[account]; } function isExcludedFromMaxTxLimit(address account) public view returns(bool) { return _isExcludedFromMaxTxLimit[account]; } function isExcludedFromMaxHoldLimit(address account) public view returns(bool) { return _isExcludedFromMaxHoldLimit[account]; } function isExcludedFromPeriodLimit(address account) public view returns(bool) { return _isExcludedFromPeriodLimit[account]; } function withdrawableDividendOf(address account) public view returns(uint256) { return dividendTracker.withdrawableDividendOf(account); } function dividendTokenBalanceOf(address account) public view returns (uint256) { return dividendTracker.balanceOf(account); } function getAccountDividendsInfo(address account) external view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { return dividendTracker.getAccount(account); } function getAccountDividendsInfoAtIndex(uint256 index) external view returns ( address, int256, int256, uint256, uint256, uint256, uint256, uint256) { return dividendTracker.getAccountAtIndex(index); } function processDividendTracker(uint256 gas) external { (uint256 iterations, uint256 claims, uint256 lastProcessedIndex) = dividendTracker.process(gas); emit ProcessedDividendTracker(iterations, claims, lastProcessedIndex, false, gas, tx.origin); } function claim() external { dividendTracker.processAccount(payable(msg.sender), false); } function getLastProcessedIndex() external view returns(uint256) { return dividendTracker.getLastProcessedIndex(); } function getNumberOfDividendTokenHolders() external view returns(uint256) { return dividendTracker.getNumberOfTokenHolders(); } function setSwapIsEnabled(bool status) external onlyOwner { swappingEnabled = status; emit UpdateSwappingStatus(status); } function setTradingIsEnabled(bool status) external onlyOwner { tradingEnabled = status; emit UpdateTradingStatus(status); } function _transfer( address from, address to, uint256 amount ) internal override { require(from != address(0), "ERC20: transfer from the zero address"); require(to != address(0), "ERC20: transfer to the zero address"); if (!_isExcludedFromPeriodLimit[from]) {…

Juman88

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Co-authored-by: Ernesto García <ernestognw@gmail.com>

improve mum performance and reduce gas cost

5ad07e1

martriay added the under review label Nov 10, 2017

spalladino merged commit 34be16d into OpenZeppelin:master Nov 14, 2017

ProphetDaniel pushed a commit to classicdelta/Smart-Contracts that referenced this pull request Mar 9, 2018

Merge pull request OpenZeppelin#522 from emn178/feature/improve_mul

c067404

improve mul performance and reduce gas cost

come-maiz mentioned this pull request May 4, 2018

Why doesn't mul() check for b == 0 in the first if? #930

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3 tasks

hskang9 mentioned this pull request Jul 27, 2018

Optimize multiplication operation on Vyper vyperlang/vyper#965

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This was referenced Aug 21, 2018

openzeppelin-solidity 0xcert/ethereum-erc20#13

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Safe Math Smart Contract Grapheneum/Contract#1

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smrMadhan7 mentioned this pull request Apr 4, 2019

Couldn't burn tokens by accessing from contract even after approval #1705

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eduardonunesp mentioned this pull request May 3, 2019

Can't verify contract blockscout/blockscout#1884

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gonzalpetraglia mentioned this pull request Nov 20, 2019

Verification not being saved for contract libraries rsksmart/rsk-contract-verifier#2

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puffanddmx mentioned this pull request Sep 1, 2020

about TRC20 tronprotocol/java-tron#3381

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xuduod mentioned this pull request Sep 29, 2020

Create 添加BTCW consenlabs/token-profile#6269

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amit779895 mentioned this pull request Dec 10, 2020

<content removed due to spam> crytic/slither#723

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krypt007 mentioned this pull request Feb 3, 2021

Fail - Unable to verify, Failed to verify 1 contract(s): LoadToken rkalis/truffle-plugin-verify#62

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erdemozturk52 mentioned this pull request Mar 18, 2021

says it was approved successfully, but it does not seem to be approved. rkalis/truffle-plugin-verify#68

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Spiderworld referenced this pull request in Spiderworld/gcg Apr 1, 2021

Initial commit

5e5e51a

ghost mentioned this pull request Apr 16, 2021

NDSKトークン情報とロゴを追加 trustwallet/assets#6532

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Godhunter97 mentioned this pull request Apr 26, 2021

Pancake Godhunter97/GH#4

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tokenxszh referenced this pull request in tokenxszh/xszh May 9, 2021

Initial commit

4d6c80c

AlexAyeCrypto mentioned this pull request May 9, 2021

Truffle plugin optimise sc-forks/solidity-coverage#630

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DINATOKEN mentioned this pull request Jul 30, 2021

1 TP-Lab/tokens#1933

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metaverseKung mentioned this pull request Aug 2, 2021

o2ox trc20 metaverseKung/o2ox#1

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ednawnika mentioned this pull request Aug 12, 2021

Want to change the address of my mapped token and redeploy with the following contract maticnetwork/pos-portal#91

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likrpaymenttoken mentioned this pull request Aug 15, 2021

LIKE PAYMENT TOKEN likrpaymenttoken/ALPT-SmartContract#3

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Y0moo mentioned this pull request Aug 17, 2021

fix coderbang1/wallet-token#1

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laukkw mentioned this pull request Aug 27, 2021

Fail - Unable to verify rkalis/truffle-plugin-verify#107

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FidelisClub mentioned this pull request Aug 30, 2021

Fidelis Token Smart Contract FidelisClub/Fidelis-Crypto#1

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LtSnakePlissken mentioned this pull request Oct 21, 2021

This contract will not verify, though it does on other blockchain explorers elastos/Elastos.ELA.SideChain.ESC.Blockscout#9

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gigafoxtoken mentioned this pull request Nov 3, 2021

gigafox.sol gigafoxtoken/gigafoxtoken#1

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seanmichael67 referenced this pull request in seanmichael67/WaterToken Nov 6, 2021

Initial commit

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rocketvilas mentioned this pull request Nov 17, 2021

Fail - Unable to verify rkalis/truffle-plugin-verify#128

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devlsd mentioned this pull request Nov 22, 2021

Shiba Crazy devlsd/Shiba-Crazy#1

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droopyfinance mentioned this pull request Nov 24, 2021

code droopy inu droopyfinance/droopy-code#2

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Juman88 reviewed Dec 2, 2021

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alexjr06 referenced this pull request in bnb-chain/bsc-genesis-contract Dec 2, 2021

update safe math

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947061 referenced this pull request in 947061/947061 Jul 27, 2022

Create adavance health bitcoin

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advance987 referenced this pull request in advance987/advance987 Aug 8, 2022

Create README.md

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ScarpaCoin referenced this pull request in ScarpaCoin/ScarpaCoin.sol Aug 22, 2022

Quick Updated

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mehedihasan12 referenced this pull request in mehedihasan12/bep20token- Aug 22, 2022

Create README.md

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Ishmaello referenced this pull request Apr 12, 2023

Add FV specification for ERC721 (#4104)

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Co-authored-by: Ernesto García <ernestognw@gmail.com>

Gynchain referenced this pull request in Gynchain/apeswap-token-lists May 12, 2023

Create GYN

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HubSwirl referenced this pull request in HubSwirl/Hub-Swirl May 16, 2023

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improve mul performance and reduce gas cost #522

improve mul performance and reduce gas cost #522

emn178 commented Oct 30, 2017

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spalladino commented Nov 13, 2017 •

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improve mul performance and reduce gas cost #522

improve mul performance and reduce gas cost #522

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emn178 commented Oct 30, 2017

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