Advantages Of The LZN Protocol Over Other Protocols
Advantages of the LZN Protocol Over Other Protocols
The security of a protocol is of the utmost importance. The Revoluzion team has put in extensive research, development, and testing to ensure that the Luzion Protocol, when deployed on the MainNet, is secure and reliable for our users' investments. We prioritize a properly functioning protocol over rushing to meet hype or deadlines.
The Luzion Protocol was the first to successfully implement a properly functioning rebase rate, as well as the correct formula for continuous automatic compounding.
Key Features of the Luzion Protocol that Set it Apart ;-
Developing the Luzion Protocol from the Ground Up: A Dedicated Team's Commitment to Quality
The Luzion Protocol was developed entirely from scratch, with no copy-pasting of code. The lead full stack developer, Nizar, and his team spent hundreds of hours perfecting every aspect of the smart contract's logic to ensure its quality
Fully Automated Dual Rewards System: Maximizing Benefits for LZN Holders
The Luzion Protocol offers fully functional dual rewards through an automated staking system. By simply holding $LZN in their wallet, users can receive both LZN reflections and BUSD rewards on a perpetual basis. This helps to stabilize the market by incentivizing holders to hold onto their $LZN, rather than cashing out, as they are consistently earning BUSD rewards as profits.
Automated Rebalancing to Ensure Long-Term Sustainability
The Luzion Protocol utilizes a fully automated rebalancing system that operates until the maximum supply is reached after 13 years. This eliminates the need for users to stake their tokens on a smart contract, which can expose them to vulnerabilities and exploits. The automated rebalancing helps to ensure the long-term sustainability of the protocol.
A Robust Rebalancing System to Maintain Token Value
The rebase rate code and logic of the Luzion Protocol are fully functioning throughout its lifespan. Unlike other protocols, the rebase rate does not need to be amended after 365 days, which helps to maintain control over the supply and prevent the mass reduction in token value over time. The Luzion Protocol's rebalancing system is robust and helps to ensure the stability and value of the token.
Automatic Token Burn to Promote Sustainability
The Luzion Protocol has a fully automated burning mechanism in place. Every transaction on the protocol automatically burns 2% of the transaction amount directly to the blackhole. This helps to reduce the overall supply of tokens and promotes sustainability.
Other protocols may have manually-executed burns that can be manipulated or sold on the market, which does not effectively reduce the supply. The automatic burn on the Luzion Protocol ensures that the supply is consistently and transparently reduced.
Transparent Token Burn Process with a Dedicated Burn Address
Other protocols may have a "burned" address that is essentially a wallet, and burns are done manually. This can be opaque and potentially subject to manipulation. The Luzion Protocol, on the other hand, has a fully automated burning mechanism that sends burned tokens directly to an actual burn address. This ensures a transparent and tamper-proof burn process. The use of a dedicated burn address also helps to increase confidence in the protocol.
Competitive Buy and Sell Tax Rates for Investors
The Luzion Protocol offers competitive buy and sell tax rates for investors. The lower fees make it more cost-effective for investors to purchase and sell tokens on the protocol, which can encourage more participation and liquidity. These competitive tax rates are a key advantage for the Luzion Protocol in the market.
Transparent and Secure Tax Fee Structure
The Luzion Protocol has a transparent and secure tax fee structure in place. The tax fee rate is hardcoded directly into the smart contract, which ensures that it cannot be adjusted or manipulated by the team.
This provides a high level of security for transactions on the protocol. In contrast, many other protocols may have variable tax fee rates or even no limits, which can be a cause for concern for investors. The hardcoded tax fee rate on the Luzion Protocol helps to build trust and confidence in the protocol.
Maximum Security for Treasury Funds with Hardware Wallet Storage
The Luzion Protocol utilizes a hardware wallet storage vault to ensure maximum security and safety for treasury funds. By storing all treasury funds directly in a hardware wallet, the protocol is able to prevent exploitation or hacks from occurring. The use of a hardware wallet provides an additional layer of security and helps to build trust and confidence in the protocol.
Transparency and Continuity with a Fully Doxxed Team
The entire Revoluzion team behind the Luzion Protocol is fully doxxed, with all necessary information readily available through social media profiles and other channels. The team is actively involved in the development and progress of the protocol, regularly holding Video AMAs and providing updates to the community.
The Revoluzion team has been with the project from the start and is committed to continuously developing and updating the protocol on a daily basis. The team's transparency and dedication to the project helps to build trust and confidence in the Luzion Protocol.
A Unique Approach to Risk Management with a Dividend Fund
Many projects have an insurance fund wallet in case of an emergency. The Luzion Protocol, however, takes a different approach to risk management by directly paying out insurance funding to users on a regular basis. This provides a risk-free investment experience for users.
The protocol's approach is based on the belief that it is not advisable to hold a large sum of insurance funds in a single entity, and instead, it is better to have the funds distributed to users consistently. The Luzion Protocol's dividend fund is a unique approach to risk management that helps to build trust and confidence in the protocol.
Luzion Protocol Smart Contract Source Code
/**
*Submitted for verification at Etherscan.io on 2022-04-11
*/
// SPDX-License-Identifier: MIT
/**
* @title Luzion Protocol
* @notice The future of Dual Reward with Auto-Staking, Auto-Compounding & BUSD Reflection all together!
*
* @custom:website https://luzion.io
* @custom:whitepaper https://docs.luzion.io
* @custom:telegram https://t.me/revoluzionecosystem
*/
pragma solidity ^0.8.13;
/** LIBRARY / DEPENDENCY **/
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @title Safe Math
*
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
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 subtraction 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;
}
}
}
/**
* @title Context
*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
/** FUNCTION **/
/**
* @dev Act as the shorthand for msg.sender reference.
*/
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
/**
* @dev Act as the shorthand for msg.data reference.
*/
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev Act as the shorthand for msg.value reference.
*/
function _msgValue() internal view virtual returns (uint256) {
return msg.value;
}
}
/**
* @title Ownable
*
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
mapping(address => bool) internal authorizations;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
authorizations[_msgSender()] = true;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Throws if called by any account other authorized accounts.
*/
modifier authorized() {
require(isAuthorized(_msgSender()), "Ownable: caller is not an authorized account");
_;
}
/**
* @dev Authorize address. Owner only
*/
function authorize(address adr) public onlyOwner {
authorizations[adr] = true;
}
/**
* @dev Remove address' authorization. Owner only
*/
function unauthorize(address adr) public onlyOwner {
authorizations[adr] = false;
}
/**
* @dev Check if address is owner
*/
function isOwner(address adr) public view returns (bool) {
return adr == owner();
}
/**
* @dev Return address' authorization status
*/
function isAuthorized(address adr) public view returns (bool) {
return authorizations[adr];
}
/**
* @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 {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
/** ERC STANDARD **/
/**
* @title IERC20Extended
*
* @dev The interface for ERC20 with metadata extension included.
*/
interface IERC20Extended {
/** FUNCTION **/
/**
* @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 (uint8);
/**
* @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);
/** EVENT **/
/**
* @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);
}
/**
* @title ERC20
*
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20Extended {
/** DATA **/
uint8 private _decimals;
uint256 private _totalSupply;
string private _name;
string private _symbol;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
/** CONSTRUTOR **/
/**
* @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(uint8 decimals_, string memory name_, string memory symbol_) {
_decimals = decimals_;
_name = name_;
_symbol = symbol_;
}
/** FUNCTION **/
/**
* @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 (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, 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}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, 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}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, 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) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, 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) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, 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:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(address from, address to, uint256 amount) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, 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 Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - 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 {}
}
/** ROUTER **/
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 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 (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 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 (uint256);
function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(address indexed sender, uint256 amount0, uint256 amount1, address indexed to);
event Swap(address indexed sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out, address indexed to);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
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 (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to) external returns (uint256 amount0, uint256 amount1);
function swap(uint256 amount0Out, uint256 amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint256);
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(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(address tokenA, address tokenB, uint256 amountADesired, uint256 amountBDesired, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline) external returns (uint256 amountA, uint256 amountB, uint256 liquidity);
function addLiquidityETH(address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline) external payable returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
function removeLiquidity(address tokenA, address tokenB, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(address tokenA, address tokenB, uint256 liquidity, uint256 amountAMin, uint256 amountBMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(uint256 amountOut, uint256 amountInMax, address[] calldata path, address to, uint256 deadline) external returns (uint256[] memory amounts);
function swapExactETHForTokens(uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(uint256 amountOut, uint256 amountInMax, address[] calldata path, address to, uint256 deadline) external returns (uint256[] memory amounts);
function swapExactTokensForETH(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external returns (uint256[] memory amounts);
function swapETHForExactTokens(uint256 amountOut, address[] calldata path, address to, uint256 deadline) external payable returns (uint256[] memory amounts);
function quote(uint256 amountA, uint256 reserveA, uint256 reserveB) external pure returns (uint256 amountB);
function getAmountOut(uint256 amountIn, uint256 reserveIn, uint256 reserveOut) external pure returns (uint256 amountOut);
function getAmountIn(uint256 amountOut, uint256 reserveIn, uint256 reserveOut) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(address token, uint256 liquidity, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline, bool approveMax, uint8 v, bytes32 r, bytes32 s) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline) external;
}
/** DIVIDEND DISTRIBUTOR **/
interface IDividendDistributor {
function setDistributionCriteria(uint256 _minPeriod, uint256 _minDistribution) external;
function setShare(address shareholder, uint256 amount) external;
function deposit() external payable;
function process(uint256 gas) external;
}
contract DividendDistributor is IDividendDistributor, Ownable {
/* LIBRARY */
using SafeMath for uint256;
/* DATA */
IERC20Extended public rewardToken;
IUniswapV2Router02 public router;
struct Share {
uint256 amount;
uint256 totalExcluded;
uint256 totalRealised;
}
bool public initialized;
uint256 public currentIndex;
uint256 public minPeriod;
uint256 public minDistribution;
uint256 public totalShares;
uint256 public totalDividends;
uint256 public totalDistributed;
uint256 public dividendsPerShare;
uint256 public dividendsPerShareAccuracyFactor;
address public _token;
address[] public shareholders;
mapping(address => uint256) public shareholderIndexes;
mapping(address => uint256) public shareholderClaims;
mapping(address => Share) public shares;
/* MODIFIER */
modifier initializer() {
require(!initialized);
_;
initialized = true;
}
modifier onlyToken() {
require(_msgSender() == _token);
_;
}
/* CONSTRUCTOR */
constructor(address rewardToken_, address router_) {
_token = _msgSender();
rewardToken = IERC20Extended(rewardToken_);
router = IUniswapV2Router02(router_);
dividendsPerShareAccuracyFactor = 10**36;
minPeriod = 1 hours;
minDistribution = 1 * (10**rewardToken.decimals());
}
/* EVENT */
event ChangeRouter(address caller, address prevRouter, address newRouter);
/* FUNCTION */
/**
* @dev Change router address.
*/
function changeRouter(IUniswapV2Router02 _router) external authorized {
address prevRouter = address(router);
router = _router;
emit ChangeRouter(_msgSender(), prevRouter, address(router));
}
/**
* @dev Only authorized address can set initialization state for distributor.
*/
function unInitialized(bool initialization) external authorized {
initialized = initialization;
}
/**
* @dev Only authorized address can set token address for dividend distributor.
*/
function setTokenAddress(address token_) external initializer authorized {
_token = token_;
}
/**
* @dev Only authorized address can set distribution criteria for dividend distributor.
*/
function setDistributionCriteria(uint256 _minPeriod, uint256 _minDistribution) external override authorized {
minPeriod = _minPeriod;
minDistribution = _minDistribution;
}
/**
* @dev Only authorized address can change reward token for dividend distribution.
*/
function changeRewardToken(IERC20Extended _rewardToken) external authorized {
rewardToken = _rewardToken;
}
/**
* @dev Only token contract can set the number of shares owned by the address.
*/
function setShare(address shareholder, uint256 amount) external override onlyToken {
if (shares[shareholder].amount > 0) {
distributeDividend(shareholder);
}
if (amount > 0 && shares[shareholder].amount == 0) {
addShareholder(shareholder);
} else if (amount == 0 && shares[shareholder].amount > 0) {
removeShareholder(shareholder);
}
totalShares = totalShares.sub(shares[shareholder].amount).add(amount);
shares[shareholder].amount = amount;
shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount);
}
/**
* @dev Only authorized address can deposit funds into the pool.
*/
function deposit() external payable override authorized {
uint256 balanceBefore = rewardToken.balanceOf(address(this));
address[] memory path = new address[](2);
path[0] = router.WETH();
path[1] = address(rewardToken);
router.swapExactETHForTokensSupportingFeeOnTransferTokens {
value: _msgValue()
} (0, path, address(this), block.timestamp);
uint256 amount = rewardToken.balanceOf(address(this)).sub(balanceBefore);
totalDividends = totalDividends.add(amount);
dividendsPerShare = dividendsPerShare.add(dividendsPerShareAccuracyFactor.mul(amount).div(totalShares));
}
/**
* @dev Only authorized address can process and trigger dividend distribution.
*/
function process(uint256 gas) external override authorized {
uint256 shareholderCount = shareholders.length;
if (shareholderCount == 0) {
return;
}
uint256 gasUsed = 0;
uint256 gasLeft = gasleft();
uint256 iterations = 0;
while (gasUsed < gas && iterations < shareholderCount) {
if (currentIndex >= shareholderCount) {
currentIndex = 0;
}
if (shouldDistribute(shareholders[currentIndex])) {
distributeDividend(shareholders[currentIndex]);
}
gasUsed = gasUsed.add(gasLeft.sub(gasleft()));
gasLeft = gasleft();
currentIndex++;
iterations++;
}
}
/**
* @dev Check if all the predetermined conditions for dividend distribution have been met.
*/
function shouldDistribute(address shareholder) internal view returns (bool) {
return shareholderClaims[shareholder] + minPeriod < block.timestamp && getUnpaidEarnings(shareholder) > minDistribution;
}
/**
* @dev Distribute dividend to the shareholders and update dividend information.
*/
function distributeDividend(address shareholder) internal {
if (shares[shareholder].amount == 0) {
return;
}
uint256 amount = getUnpaidEarnings(shareholder);
if (amount > 0) {
totalDistributed = totalDistributed.add(amount);
rewardToken.transfer(shareholder, amount);
shareholderClaims[shareholder] = block.timestamp;
shares[shareholder].totalRealised = shares[shareholder].totalRealised.add(amount);
shares[shareholder].totalExcluded = getCumulativeDividends(shares[shareholder].amount);
}
}
/**
* @dev Get the cumulative dividend for the given share.
*/
function getCumulativeDividends(uint256 share) internal view returns (uint256) {
return share.mul(dividendsPerShare).div(dividendsPerShareAccuracyFactor);
}
/**
* @dev Get unpaid dividend that needed to be distributed for the given address.
*/
function getUnpaidEarnings(address shareholder) public view returns (uint256) {
if (shares[shareholder].amount == 0) {
return 0;
}
uint256 shareholderTotalDividends = getCumulativeDividends(shares[shareholder].amount);
uint256 shareholderTotalExcluded = shares[shareholder].totalExcluded;
if (shareholderTotalDividends <= shareholderTotalExcluded) {
return 0;
}
return shareholderTotalDividends.sub(shareholderTotalExcluded);
}
/**
* @dev Add the address to the array of shareholders.
*/
function addShareholder(address shareholder) internal {
shareholderIndexes[shareholder] = shareholders.length;
shareholders.push(shareholder);
}
/**
* @dev Remove the address from the array of shareholders.
*/
function removeShareholder(address shareholder) internal {
shareholders[shareholderIndexes[shareholder]] = shareholders[shareholders.length - 1];
shareholderIndexes[shareholders[shareholders.length - 1]] = shareholderIndexes[shareholder];
shareholders.pop();
}
/**
* @dev Allow user to manually claim their accumulated dividend.
*/
function claimDividend() external {
distributeDividend(_msgSender());
}
}
/** LUZION PROTOCOL **/
contract LuzionProtocol is ERC20, Ownable {
/** LIBRARY **/
using SafeMath for uint256;
/** DATA **/
IUniswapV2Router02 public router;
IUniswapV2Pair public pairContract;
DividendDistributor public distributor;
address private constant DEAD = address(0xdead);
address private constant ZERO = address(0);
address public pair;
address public autoLiquidityReceiver;
address public treasuryReceiver;
address public ecosystemReceiver;
address public autoBlackhole;
uint8 public rateDecimals;
uint256 public rebaseRate;
uint256 public uintMax;
uint256 public gonsTotal;
uint256 public supplyTotal;
uint256 public supplyMax;
uint256 public supplyInitialFragment;
uint256 public lastRebasedTime;
uint256 public lastAddLiquidityTime;
uint256 public initRebaseStartTime;
uint256 public distributorGas;
uint256 public liquidityFee;
uint256 public treasuryFee;
uint256 public ecosystemFee;
uint256 public dividendFee;
uint256 public sellFee;
uint256 public autoBlackholeFee;
uint256 public totalFee;
uint256 public feeDenominator;
uint256 public gonsPerFragment;
uint256 public gonSwapThreshold;
uint256 public targetLiquidity;
uint256 public targetLiquidityDenominator;
bool public inSwap;
bool public swapEnabled;
bool public autoAddLiquidity;
bool public autoRebase;
mapping(address => bool) public _blacklistBotContract;
mapping(address => bool) public _isFeeExempt;
mapping(address => bool) public _isDividendExempt;
mapping(address => uint256) public _gonBalances;
mapping(address => mapping(address => uint256)) public _allowedFragments;
/** MODIFIER **/
modifier swapping() {
inSwap = true;
_;
inSwap = false;
}
modifier validRecipient(address from, address to) {
require(to != address(ZERO), "Cannot send to zero address!");
require(!_blacklistBotContract[from], "Sender address has been blacklisted because it is a bot contract address!");
require(!_blacklistBotContract[to], "Recipient address has been blacklisted because it is a bot contract address!");
_;
}
/** CONSTRUCTOR **/
constructor(
uint256 _supplyMax,
uint256 _supplyInitial,
address _router,
DividendDistributor _distributor,
address[4] memory _feeReceiverSettings
) ERC20(5, "Luzion Protocol", "LZN") {
router = IUniswapV2Router02(_router);
pair = IUniswapV2Factory(router.factory()).createPair(address(this), router.WETH());
pairContract = IUniswapV2Pair(pair);
_allowedFragments[address(this)][address(router)] = type(uint256).max;
uintMax = ~uint256(0);
rateDecimals = 7;
distributorGas = 500000;
dividendFee = 4;
liquidityFee = 2;
treasuryFee = 2;
ecosystemFee = 2;
autoBlackholeFee = 2;
sellFee = 4;
feeDenominator = 100;
targetLiquidity = 50;
targetLiquidityDenominator = 100;
_initializeFeeReceivers(_feeReceiverSettings);
_initializeDistributor(_distributor);
initRebaseStartTime = block.timestamp;
lastRebasedTime = block.timestamp;
totalFee = liquidityFee.add(treasuryFee).add(ecosystemFee).add(dividendFee).add(autoBlackholeFee);
supplyInitialFragment = _supplyInitial.mul(10**5);
supplyTotal = supplyInitialFragment;
supplyMax = _supplyMax.mul(10**5);
gonsTotal = uintMax - (uintMax % supplyInitialFragment);
gonsPerFragment = gonsTotal.div(supplyTotal);
gonSwapThreshold = gonsTotal.div(10000).mul(10);
_gonBalances[_msgSender()] = gonsTotal;
autoRebase = false;
autoAddLiquidity = true;
swapEnabled = true;
_isFeeExempt[_msgSender()] = true;
_isFeeExempt[address(this)] = true;
_isFeeExempt[treasuryReceiver] = true;
_isFeeExempt[ecosystemReceiver] = true;
_isDividendExempt[_msgSender()] = true;
_isDividendExempt[pair] = true;
_isDividendExempt[address(this)] = true;
_isDividendExempt[DEAD] = true;
_transferOwnership(_msgSender());
emit Transfer(address(ZERO), _msgSender(), supplyTotal);
}
/** EVENT **/
event RebaseInitiated(uint256 indexed epoch, uint256 totalSupply);
event ChangeRouter(address caller, address prevRouter, address newRouter);
event ChangePairContract(address caller, address prevPairContract, address newPairContract);
event BotBlacklisted(address botAddress);
/** FUNCTION **/
// General function
receive() external payable {}
/**
* @dev Change router address.
*/
function changeRouter(IUniswapV2Router02 _router) external authorized {
address prevRouter = address(router);
router = _router;
emit ChangeRouter(_msgSender(), prevRouter, address(router));
}
/**
* @dev Change pair contract address.
*/
function changePairContract(address _address) external authorized {
address prevPairContract = address(pairContract);
pairContract = IUniswapV2Pair(_address);
emit ChangeRouter(_msgSender(), prevPairContract, address(pairContract));
}
/**
* @dev Initiate manual synchronization.
*/
function manualSync() external {
IUniswapV2Pair(pair).sync();
}
/**
* @dev Get the circulating supply based on fragment.
*/
function getCirculatingSupply() public view returns (uint256) {
return (gonsTotal.sub(_gonBalances[DEAD]).sub(_gonBalances[ZERO])).div(gonsPerFragment);
}
/**
* @dev Get the status for auto rebase.
*/
function setAutoRebase(bool _flag) external authorized {
if (_flag) {
autoRebase = _flag;
lastRebasedTime = block.timestamp;
} else {
autoRebase = _flag;
}
}
/**
* @dev Set blacklist for known bot contract.
*/
function setBotBlacklist(address _botAddress, bool _flag) external authorized {
require(
isContract(_botAddress),
"Externally owned account are not allowed to be blacklisted only input smart contract address used for bot."
);
_blacklistBotContract[_botAddress] = _flag;
emit BotBlacklisted(_botAddress);
}
/**
* @dev Set settings for swap back.
*/
function setSwapBackSettings(bool _enabled, uint256 _numerator, uint256 _denominator) external authorized {
swapEnabled = _enabled;
gonSwapThreshold = gonsTotal.div(_denominator).mul(_numerator);
}
/**
* @dev Allow authorized account to rescue the token in the smart contract.
*/
function rescueToken(address _tokenAddress, uint256 _tokens) external authorized returns (bool success) {
return ERC20(_tokenAddress).transfer(_msgSender(), _tokens);
}
// Internal functions
/**
* @dev Rebase logic that will run internally.
*/
function rebase() internal {
if ( inSwap ) {
return;
}
uint256 deltaTimeFromInit = block.timestamp - initRebaseStartTime;
uint256 deltaTime = block.timestamp - lastRebasedTime;
uint256 times = deltaTime.div(15 minutes);
uint256 epoch = times.mul(15);
if (deltaTimeFromInit < (365 days)) {
rebaseRate = 2355;
} else if (deltaTimeFromInit >= (365 days) && deltaTimeFromInit < ((15 * 365 days) / 10)) {
rebaseRate = 211;
} else if (deltaTimeFromInit >= ((15 * 365 days) / 10) && deltaTimeFromInit < (7 * 365 days)) {
rebaseRate = 14;
} else if (deltaTimeFromInit >= (7 * 365 days)) {
rebaseRate = 2;
}
for (uint256 i = 0; i < times; i++) {
supplyTotal = supplyTotal.mul((10**rateDecimals).add(rebaseRate)).div(10**rateDecimals);
}
gonsPerFragment = gonsTotal.div(supplyTotal);
lastRebasedTime = lastRebasedTime.add(times.mul(15 minutes));
pairContract.sync();
emit RebaseInitiated(epoch, supplyTotal);
}
/**
* @dev Logic to take fee that will run internally.
*/
function takeFee(address _from, address _to, uint256 _gonAmount) internal returns (uint256) {
uint256 _totalFee = totalFee;
uint256 _treasuryFee = treasuryFee;
if (_to == pair) {
_totalFee = totalFee.add(sellFee);
_treasuryFee = treasuryFee.add(sellFee);
}
uint256 feeAmount = _gonAmount.mul(_totalFee).div(feeDenominator);
_gonBalances[autoBlackhole] = _gonBalances[autoBlackhole].add(
_gonAmount.mul(autoBlackholeFee).div(feeDenominator)
);
_gonBalances[address(this)] = _gonBalances[address(this)].add(
_gonAmount.mul(_treasuryFee).div(feeDenominator)
);
_gonBalances[address(this)] = _gonBalances[address(this)].add(
_gonAmount.mul(ecosystemFee).div(feeDenominator)
);
_gonBalances[address(this)] = _gonBalances[address(this)].add(
_gonAmount.mul(dividendFee).div(feeDenominator)
);
_gonBalances[autoLiquidityReceiver] = _gonBalances[autoLiquidityReceiver].add(
_gonAmount.mul(liquidityFee).div(feeDenominator)
);
emit Transfer(_from, address(this), feeAmount.div(gonsPerFragment));
return _gonAmount.sub(feeAmount);
}
/**
* @dev Logic to swap back the token that will run internally.
*/
function swapBack() internal swapping {
uint256 amountToSwap = _gonBalances[address(this)].div(gonsPerFragment);
if( amountToSwap == 0) {
return;
}
uint256 balanceBefore = address(this).balance;
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap, 0, path, address(this), block.timestamp);
uint256 amountETHToRespectiveReceiver = address(this).balance.sub(balanceBefore);
uint256 feeTotal = treasuryFee.add(ecosystemFee).add(dividendFee);
try distributor.deposit {
value: amountETHToRespectiveReceiver.mul(dividendFee).div(feeTotal)
} () {} catch {}
(bool success, ) = payable(treasuryReceiver).call{
value: amountETHToRespectiveReceiver.mul(treasuryFee).div(feeTotal),
gas: 30000
}("");
(success, ) = payable(ecosystemReceiver).call{
value: amountETHToRespectiveReceiver.mul(ecosystemFee).div(feeTotal),
gas: 30000
}("");
success = false;
}
/**
* @dev Add liquidity logic that will run internally.
*/
function addLiquidity() internal swapping {
uint256 dynamicLiquidityFee = isOverLiquified(targetLiquidity, targetLiquidityDenominator) ? 0 : liquidityFee;
uint256 autoLiquidityAmount = _gonBalances[address(this)].div(gonsPerFragment);
_gonBalances[autoLiquidityReceiver] = 0;
uint256 amountToLiquify = autoLiquidityAmount.mul(dynamicLiquidityFee).div(totalFee).div(2);
uint256 amountToSwap = autoLiquidityAmount.sub(amountToLiquify);
if( amountToSwap == 0 ) {
return;
}
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
uint256 balanceBefore = address(this).balance;
router.swapExactTokensForETHSupportingFeeOnTransferTokens(amountToSwap, 0, path, address(this), block.timestamp);
uint256 amountETHLiquidity = address(this).balance.sub(balanceBefore);
if (amountToLiquify > 0 && amountETHLiquidity > 0) {
router.addLiquidityETH{value: amountETHLiquidity}(
address(this),
amountToLiquify,
0,
0,
autoLiquidityReceiver,
block.timestamp
);
}
lastAddLiquidityTime = block.timestamp;
}
/**
* @dev Token buyback logic that will run internally.
*/
function buyTokens(uint256 amount, address to) internal swapping {
address[] memory path = new address[](2);
path[0] = router.WETH();
path[1] = address(this);
router.swapExactETHForTokensSupportingFeeOnTransferTokens {
value: amount
} (0, path, to, block.timestamp);
}
// Override ERC standard
/**
* @dev Override ERC logic for approve to accommodate fragments.
*/
function approve(address _spender, uint256 _value) public override returns (bool) {
_allowedFragments[_msgSender()][_spender] = _value;
emit Approval(_msgSender(), _spender, _value);
return true;
}
/**
* @dev Override ERC logic for allowance to accommodate fragments.
*/
function allowance(address _owner, address _spender) public view override returns (uint256) {
return _allowedFragments[_owner][_spender];
}
/**
* @dev Override ERC logic for decrease allowance to accommodate fragments.
*/
function decreaseAllowance(address _spender, uint256 _subtractedValue) public override returns (bool) {
uint256 oldValue = _allowedFragments[_msgSender()][_spender];
if (_subtractedValue >= oldValue) {
_allowedFragments[_msgSender()][_spender] = 0;
} else {
_allowedFragments[_msgSender()][_spender] = oldValue.sub(_subtractedValue);
}
emit Approval(_msgSender(), _spender, _allowedFragments[_msgSender()][_spender]);
return true;
}
/**
* @dev Override ERC logic for increase allowance to accommodate fragments.
*/
function increaseAllowance(address _spender, uint256 _addedValue) public override returns (bool) {
_allowedFragments[_msgSender()][_spender] = _allowedFragments[_msgSender()][_spender].add(_addedValue);
emit Approval(_msgSender(), _spender, _allowedFragments[_msgSender()][_spender]);
return true;
}
/**
* @dev Override ERC logic for transfer to check addresses.
*/
function transfer(address _to, uint256 _value) public override validRecipient(_msgSender(), _to) returns (bool) {
_transferFrom(_msgSender(), _to, _value);
return true;
}
/**
* @dev Override ERC logic for transfer from to check addresses and accommodate fragment.
*/
function transferFrom(address _from, address _to, uint256 _value) public override validRecipient(_from, _to) returns (bool) {
if (_allowedFragments[_from][_msgSender()] != type(uint256).max) {
_allowedFragments[_from][_msgSender()] = _allowedFragments[_from][_msgSender()].sub(_value, "Insufficient Allowance");
}
_transferFrom(_from, _to, _value);
return true;
}
/**
* @dev Override ERC logic for transfer that will be executed internally based on predetermined conditions.
*/
function _basicTransfer(address _from, address _to, uint256 _amount) internal returns (bool) {
uint256 gonAmount = _amount.mul(gonsPerFragment);
_gonBalances[_from] = _gonBalances[_from].sub(gonAmount);
_gonBalances[_to] = _gonBalances[_to].add(gonAmount);
return true;
}
/**
* @dev Override ERC logic for transfer from that will be executed internally based on predetermined conditions.
*/
function _transferFrom(address _from, address _to, uint256 _amount) internal returns (bool) {
if (inSwap) {
return _basicTransfer(_from, _to, _amount);
}
if (shouldRebase()) {
rebase();
}
if (shouldAddLiquidity()) {
addLiquidity();
}
if (shouldSwapBack()) {
swapBack();
}
uint256 gonAmount = _amount.mul(gonsPerFragment);
_gonBalances[_from] = _gonBalances[_from].sub(gonAmount);
uint256 gonAmountReceived = shouldTakeFee(_from, _to) ? takeFee(_from, _to, gonAmount) : gonAmount;
_gonBalances[_to] = _gonBalances[_to].add(gonAmountReceived);
if(!_isDividendExempt[_from]) {
try distributor.setShare(_from, balanceOf(_from)) {} catch {}
}
if(!_isDividendExempt[_to]) {
try distributor.setShare(_to, balanceOf(_to)) {} catch {}
}
try distributor.process(distributorGas) {} catch {}
emit Transfer(_from, _to, gonAmountReceived.div(gonsPerFragment));
return true;
}
/**
* @dev Override ERC logic for total supply.
*/
function totalSupply() public view override returns (uint256) {
return supplyTotal;
}
/**
* @dev Override ERC logic for balance of an address and accommodate balance based on fragment.
*/
function balanceOf(address account) public view override returns (uint256) {
return _gonBalances[account].div(gonsPerFragment);
}
// Check function
/**
* @dev Check whether the predetermined conditions for taking fees have been met.
*/
function shouldTakeFee(address from, address to) internal view returns (bool) {
return (pair == from || pair == to) && !_isFeeExempt[from];
}
/**
* @dev Check whether the predetermined conditions for rebase have been met.
*/
function shouldRebase() internal view returns (bool) {
return autoRebase && (supplyTotal < supplyMax) && _msgSender() != pair && !inSwap && block.timestamp >= (lastRebasedTime + 15 minutes);
}
/**
* @dev Check whether the predetermined conditions for adding liquidity have been met.
*/
function shouldAddLiquidity() internal view returns (bool) {
return autoAddLiquidity && !inSwap && _msgSender() != pair && block.timestamp >= (lastAddLiquidityTime + 12 hours);
}
/**
* @dev Check whether the predetermined condition for swap back have been met.
*/
function shouldSwapBack() internal view returns (bool) {
return swapEnabled && !inSwap && _msgSender() != pair && _gonBalances[address(this)] >= gonSwapThreshold;
}
/**
* @dev Check if it is currently overliquified.
*/
function isOverLiquified(uint256 target, uint256 accuracy) public view returns (bool) {
return getLiquidityBacking(accuracy) > target;
}
/**
* @dev Check to make sure that the transaction is not in swap.
*/
function isNotInSwap() external view returns (bool) {
return !inSwap;
}
/**
* @dev Check whether fees are exempted from the given address.
*/
function checkFeeExempt(address _addr) external view returns (bool) {
return _isFeeExempt[_addr];
}
/**
* @dev Check the value of swap threshold.
*/
function checkSwapThreshold() external view returns (uint256) {
return gonSwapThreshold.div(gonsPerFragment);
}
/**
* @dev Check whether the given address is a contract address.
*/
function isContract(address addr) internal view returns (bool) {
uint256 size;
assembly { size := extcodesize(addr) }
return size > 0;
}
// Fees related functions
/**
* @dev Set all the fee receiver settings during contract initialization.
*
* NOTE:
* 0 - Auto liquidity receiver
* 1 - Treasury receiver
* 2 - Ecosystem receiver
* 3 - Auto blackhole
*/
function _initializeFeeReceivers(address[4] memory _feeReceiverSettings) internal {
_setFeeReceivers(_feeReceiverSettings[0], _feeReceiverSettings[1], _feeReceiverSettings[2], _feeReceiverSettings[3]);
}
/**
* @dev Set all the addresses that will receive fee.
*/
function setFeeReceivers(address _autoLiquidityReceiver, address _treasuryReceiver, address _ecosystemReceiver, address _autoBlackhole) external authorized {
_setFeeReceivers(_autoLiquidityReceiver, _treasuryReceiver, _ecosystemReceiver, _autoBlackhole);
}
/**
* @dev Run internally to set all the fee receiver settings.
*/
function _setFeeReceivers(address _autoLiquidityReceiver, address _treasuryReceiver, address _ecosystemReceiver, address _autoBlackhole) internal {
autoLiquidityReceiver = _autoLiquidityReceiver;
treasuryReceiver = _treasuryReceiver;
ecosystemReceiver = _ecosystemReceiver;
autoBlackhole = _autoBlackhole;
}
/**
* @dev Exempt an address from fee.
*/
function setIsFeeExempt(address holder, bool exempt) external authorized {
_isFeeExempt[holder] = exempt;
}
// Dividend related functions
/**
* @dev Set dividend distributor to be used for this contract.
*/
function _initializeDistributor(DividendDistributor distributor_) internal {
distributor = DividendDistributor(distributor_);
}
/**
* @dev Initialize dividend distributor.
*/
function distributorInitialization(bool initialized) public authorized {
distributor.unInitialized(initialized);
}
/**
* @dev Set the information for dividend distributor.
*/
function setDividendDistributor(address distributor_) public authorized {
distributor.unInitialized(false);
distributor.setTokenAddress(_msgSender());
distributor = DividendDistributor(distributor_);
}
/**
* @dev Set the criteria for dividend distribution.
*/
function setDistributionCriteria(uint256 _minPeriod, uint256 _minDistribution) external authorized {
distributor.setDistributionCriteria(_minPeriod, _minDistribution);
}
/**
* @dev Set the maximum gas to be used for auto dividend distribution.
*/
function setDistributorSettings(uint256 gas) external authorized {
require(gas < 750000, "Gas must be lower than 750000");
distributorGas = gas;
}
/**
* @dev Exempt an address from dividend.
*/
function setIsDividendExempt(address holder, bool exempt) external authorized {
require(holder != address(this) && holder != pair);
_isDividendExempt[holder] = exempt;
if (exempt) {
distributor.setShare(holder, 0);
} else {
distributor.setShare(holder, balanceOf(holder));
}
}
// Liquidity related functions
/**
* @dev Get liquidity backing.
*/
function getLiquidityBacking(uint256 accuracy) public view returns (uint256) {
uint256 liquidityBalance = _gonBalances[pair].div(gonsPerFragment);
return accuracy.mul(liquidityBalance.mul(2)).div(getCirculatingSupply());
}
/**
* @dev Set the status for add liquidity automation.
*/
function setAutoAddLiquidity(bool _flag) external authorized {
if(_flag) {
autoAddLiquidity = _flag;
lastAddLiquidityTime = block.timestamp;
} else {
autoAddLiquidity = _flag;
}
}
/**
* @dev Set settings for target liquidity.
*/
function setTargetLiquidity(uint256 _target, uint256 _denominator) external authorized {
targetLiquidity = _target;
targetLiquidityDenominator = _denominator;
}
// Buyback relateed functions
/**
* @dev Allow buyback and burn the token using funds stucked in smart contract.
*/
function triggerZeusBuyback(uint256 amount) external authorized {
buyTokens(amount, DEAD);
}
}Last updated