/**
*Submitted for verification at BscScan.com on 2021-12-09
*/
//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;
}
}
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 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 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 ButterflySHIELD is ERC20, Ownable {
using SafeMath for uint256;
IPancakeRouter02 public pancakeRouter;
address public pancakePair;
bool private swapping;
BussDividendTracker public dividendTracker;
address public marketingWallet = 0x455a2A20d3f7DfC48913162971AF8EE207F274f1;
address public buybackWallet = 0x9A2CBA7d715b03Dd4b99b57C58b55f837DFd3103;
uint256 public maxTransactionAmount;
uint256 public maxHoldingAmount;
uint256 public swapTokensAtAmount = 10**6 * (10**decimals());
uint256 public buyback = 5;
uint256 public marketingFee = 5;
uint256 public dividendFee = 5;
uint256 public sellBuybackFee = 6;
uint256 public sellMarketingFee = 11;
uint256 public sellDividendFee = 4;
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 = false;
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("Butterfly SHIELD", "BUSS") {
dividendTracker = new BussDividendTracker();
updatePancakeRouter(0x10ED43C718714eb63d5aA57B78B54704E256024E);
// updatePancakeRouter(0xD99D1c33F9fC3444f8101754aBC46c52416550D1); // testnet
// 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(owner(), 10**9 * (10**decimals()));
maxTransactionAmount = totalSupply().div(200);
maxHoldingAmount = totalSupply().div(100);
}
function updatePancakeRouter(address newAddress) public onlyOwner {
require(newAddress != address(pancakeRouter), "Butterfly SHIELD: 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), "Butterfly SHIELD: The dividend tracker already has that address");
BussDividendTracker newDividendTracker = BussDividendTracker(payable(newAddress));
require(newDividendTracker.owner() == address(this), "Butterfly SHIELD: The new dividend tracker must be owned by the BUSS 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, "Butterfly SHIELD: 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, "Butterfly SHIELD: 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, "Butterfly SHIELD: 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, "Butterfly SHIELD: gasForProcessing must be between 200,000 and 500,000");
require(newValue != gasForProcessing, "Butterfly SHIELD: 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]) {
require(getAccountPeriodSellVolume(from).add(amount) <= balanceOf(from).div(2), "Sell limit!");
}
if (!_isExcludedFromPeriodLimit[from]) {
accountLastPeriodSellVolume[from] = accountLastPeriodSellVolume[from].add(amount);
Sell memory sell;
sell.amount = amount;
sell.time = block.timestamp;
accountSells[from].push(sell);
emit AddLastPeriodSellInfo(sell.time, sell.amount);
}
if(!tradingEnabled) {
require(canTransferBeforeTradingIsEnabled[from], "Butterfly SHIELD: This account cannot send tokens until trading is enabled");
}
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if( !swapping &&
tradingEnabled &&
!_isExcludedFromMaxTxLimit[from] &&
!_isExcludedFromMaxTxLimit[to] ) {
require(amount <= maxTransactionAmount, "Transfer amount exceeds the maxTransactionAmount.");
}
bool canSwap = balanceOf(address(this)) >= swapTokensAtAmount;
if(
tradingEnabled &&
canSwap &&
!swapping &&
swappingEnabled &&
msg.sender != pancakePair
) {
swapping = true;
swapAndDistributeBNB(swapTokensAtAmount);
swapping = false;
}
bool takeFee = tradingEnabled && !swapping;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
if(takeFee) {
uint256 forBuyback;
uint256 forMarketing;
uint256 forDividends;
if (to == pancakePair) {
forBuyback = amount.mul(sellBuybackFee).div(100);
forMarketing = amount.mul(sellMarketingFee).div(100);
forDividends = amount.mul(sellDividendFee).div(100);
} else {
forBuyback = amount.mul(buyback).div(100);
forMarketing = amount.mul(marketingFee).div(100);
forDividends = amount.mul(dividendFee).div(100);
}
accBuybackFee = accBuybackFee.add(forBuyback);
accMarketingFee = accMarketingFee.add(forMarketing);
accDividendFee = accDividendFee.add(forDividends);
uint256 fees = forBuyback.add(forMarketing).add(forDividends);
amount = amount.sub(fees);
super._transfer(from, address(this), fees);
}
if (!_isExcludedFromMaxHoldLimit[to]) {
require(balanceOf(to).add(amount) <= maxHoldingAmount, "Reached max holding limit!");
}
super._transfer(from, to, amount);
try dividendTracker.setBalance(payable(from), balanceOf(from)) {} catch {}
try dividendTracker.setBalance(payable(to), balanceOf(to)) {} catch {}
if(!swapping) {
uint256 gas = gasForProcessing;
try dividendTracker.process(gas) returns (uint256 iterations, uint256 claims, uint256 lastProcessedIndex) {
emit ProcessedDividendTracker(iterations, claims, lastProcessedIndex, true, gas, tx.origin);
}
catch {
emit ErrorInProcess(msg.sender);
}
}
}
function swapTokensForEth(uint256 tokenAmount) private {
emit StartSwapTokensForEth(tokenAmount);
// generate the pancake pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = pancakeRouter.WETH();
_approve(address(this), address(pancakeRouter), tokenAmount);
// make the swap
pancakeRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
emit FinishSwapTokensForEth(address(this).balance);
}
function swapAndDistributeBNB(uint256 tokens) private {
swapTokensForEth(tokens);
uint256 balance = address(this).balance;
uint256 accTotal = accBuybackFee.add(accDividendFee).add(accMarketingFee);
uint256 forMarketing = balance.mul(accMarketingFee).div(accTotal);
uint256 forBuyback = balance.mul(accBuybackFee).div(accTotal);
uint256 forDividends = balance.sub(forBuyback).sub(forMarketing);
emit CalculatedBNBForEachRecipient(forMarketing, forBuyback, forDividends);
(bool success,) = address(marketingWallet).call{value: forMarketing}("");
if(success) {
emit SwapAndSendTo(accMarketingFee, forMarketing, "MARKETING");
accMarketingFee = 1;
}
(success,) = address(buybackWallet).call{value: forBuyback}("");
if(success) {
emit SwapAndSendTo(accBuybackFee, forBuyback, "ANTI DUMP");
accBuybackFee = 1;
}
(success,) = address(dividendTracker).call{value: forDividends}("");
if(success) {
emit SwapAndSendTo(accDividendFee, forDividends, "DIVIDENDS");
accDividendFee = 1;
}
}
function withdrawStuckTokens(address _token, uint256 _amount) public onlyOwner {
IERC20(_token).transfer(msg.sender, _amount);
}
}
contract BussDividendTracker 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("BussDividendTracker", "Buss_DividendTracker") {
claimWait = 3600;
minimumTokenBalanceForDividends = 10000 * (10**decimals()); //must hold 10000+ tokens
}
function _transfer(address, address, uint256) internal pure override {
require(false, "BussDividendTracker: No transfers allowed");
}
function withdrawDividend() public pure override {
require(false, "BussDividendTracker: withdrawDividend disabled. Use the 'claim' function on the main BUSS 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;
}
}
1 Like
Hi, welcome to the community! 
It seems like when you deploy the contract ButterflySHIELD, it will mint some token the owner, so its total supply is not zero, maybe you can share the contract address.
How to see those minted token because I don't see them ...when I add in metamusk it shows zero tokens minted
Which function is not in good ..because everytime I tried to deploy it mint zero tokens
I am not sure how did you deploy your contract, so I want the contract address to have a look.
And I think when you deploy your contract, you should choose the correct one to deploy rather than use the default one.
Thanks for supporting
Can you help me where should I exactly edit and deploy
I need to edit name of contract
Symbol
Decimal
And supply only
And try again to deploy if total supply will be minted
0x8397E6Cbed1b450A217591ccfb004B8d66A429e5
This is contract in testnet
It doesn't display name,symbol and total supply ...help please
You can have a look at your contract, it is the Ownable contract, so it does not have the variable name and symbol
Contract Address 0x8397E6Cbed1b450A217591ccfb004B8d66A429e5 | BscScan
Make sure you are deploying the correct contract, which is ButterflySHIELD in this example.
How to change contract to be able to see name and symbol and total supply
Okay let me try again ...did it shows name and supply in your side ??
Hello I tried again to deploy ...now symbol and name is displaying as normal ...problem is total supply is reading zero
Help how to solve this
Use the flattener, flatten the contract after it comples. You will be instructed exactly how to save the flattened contract file. When you go to deploy the contract. Make sure it says your contract with the _flat.sol in the modal box, if not select it from the drop do menu. It might not deploy as the contract in abstract. If the abstract modifier doesn’t not agree with the constructor on chain. It is possible that is won’t launch.
Lastly, I hope that you changed all those hard codes wallet addresses that are in this forked contract. If you did not you could end up giving away whatever DEFI rugpull you are trying to launch. Be careful when copying and pasting contracts. You should understand what the contract does and how to read said contract. Visit Ethereum.org /read.the.docs. Essentially you would be pulling a rugpull on yourself if you leave at the wallet addresses that you do not have custody to. I hope you know, that you will have to deploy a DAPP to control the functions of the token externally. Doing this from inside Remix is not advisable. If none of this is making sense, you should kindly and respectfully educate yourself before playing in the remix sand box. Launch a few simple smart contracts in the test net. You can find many great follow along videos on YouTube. Please be responsible this is a DEFI project that you are planning on launching. You should be serious, have a team, understand that this is the future not away to fill your wallet with investors hard earned money. If you are asking all these questions , there is no reason for you to be forking a token, that a Master Chef Dev worked tirelessly on.
You deployed an ERC20 token and it does not mint new token to anyone, so the totalSupply is zero.
totalSupply have to be amount * the decimal of the token, else, it wont show the supply amount correctly.
2 posts were merged into an existing topic: Erc20 token smart contract shows Total Supply is 0 uint256