Contract Source Code:
File 1 of 1 : Pari
// SPDX-License-Identifier: MIT
// File: IParidex.sol
pragma solidity >=0.6.6;
pragma experimental ABIEncoderV2;
interface IParidex {
function isMan(address _sender) external returns (bool);
function isPari(address _pari) external returns (bool);
function isLeva(address _leva) external returns (bool);
function getPari() external returns (address);
function getLevaList() external returns (address[] memory);
function getSmartLock() external returns (bool);
function getSLNONContract() external returns (bool);
function addLiquidity(address factory, 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 addLiquidityAuto(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 removeLiquidity(address factory, address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline) external returns (uint amountA, uint amountB);
function removeLiquidityAuto(address tokenA, address tokenB, uint liquidity, uint amountAMin, uint amountBMin, address to, uint deadline) external returns (uint amountA, uint amountB);
function consultLeva2Usd(address _leva, uint _amount) external returns (uint);
function consultPari2Usd(uint _amount) external returns (uint);
function consultPari2Leva(address _leva, uint _pariAmount) external returns (uint);
function consultLeva2Pari(address _leva, uint _levaAmount) external returns (uint);
function consultLeva2Leva(address _levaIn, address _levaOut, uint _levaInAmount) external returns (uint);
function consultSmart(address _inToken, address _outToken, uint _inAmount) external returns (uint);
function swapPari2Leva(address _leva, uint _pariAmount, uint _minLevaAmount) external returns (uint out);
function swapLeva2Pari(address _leva, uint _levaAmount, uint _minPariAmount) external returns (uint out);
function swapLeva2Leva(address _levaIn, address _levaOut, uint _levaAmount, uint _minLevaAmount) external returns (uint out);
function swapSmart(address _inToken, address _outToken, uint _inAmount, uint _minOutAmount) external returns (uint out);
function swapExactTokensForTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint steps, uint deadline) external returns (address[] memory factories, uint[] memory amounts);
function arbitrage(address _token, uint _amount, address _middleToken) external returns (uint revenue, address[] memory factories, uint[] memory amounts);
function stabilize(address _sender, address _taker, uint _amount) external returns (uint revenue, address[] memory factories, uint[] memory amounts);
function addLeva(address _leva) external returns (bool);
function removeLeva(address _leva) external returns (bool);
function changePari(address _pari) external returns (bool);
function changeStableCoin2Usd(address _stablecoin2usd) external returns (bool);
function changeSTABLECOIN(address _STABLECOIN) external returns (bool);
function changeAnyOracle(address _anyOracle) external returns (bool);
function changeTax(uint _tax) external returns (bool);
function changeSmartLock(bool _smartLock) external returns (bool);
function changeSLNONContract(bool _SLNONContract) external returns (bool);
function changeTrigger(address _trigger) external returns (bool);
function changeMan(address _manager) external returns (bool);
function migrate(address _newInstance) external returns (bool);
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev 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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
uint256 amount
) external returns (bool);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: ILeva.sol
pragma solidity ^0.8.7;
interface ILeva is IERC20, IERC20Metadata {
function burn(uint amount) external;
function burnFrom(address account, uint amount) external;
function burnNGet(uint _amount) external returns (uint);
function burnFromNGet(address _account, uint _amount) external returns (uint);
function mint(address _to, uint _amount) external returns (bool);
function getPeg() external view returns (address);
function rePeg(address _pegOracle) external returns (bool);
function setParidex(address _paridex) external returns (bool);
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin 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, 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 (uint8) {
return 18;
}
/**
* @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 `from` to `to`.
*
* 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 {}
}
// File: Pari.sol
pragma solidity ^0.8.7;
contract Pari is ERC20 {
address public paridex;
event FailedStabilization(address indexed from, address indexed to, uint amount, bytes reason);
event ParidexChanged(address indexed _paridex);
constructor(
address _paridex,
uint _initialSupply
) ERC20("PariDEX", "PARI") {
paridex = _paridex;
_mint(_msgSender(), _initialSupply * 10 ** decimals());
}
function _onlyLeva() internal {
require(IParidex(paridex).isLeva(_msgSender()), "ONLY_LEVA");
}
function _onlyMan() internal {
if(_msgSender() != paridex) {
require(IParidex(paridex).isMan(_msgSender()), "ONLY_MANAGER");
}
}
function _smartLocked() internal {
require(!IParidex(paridex).getSmartLock() || (IParidex(paridex).getSLNONContract() && !_isContractOrNull(_msgSender())) || _msgSender() == paridex || IParidex(paridex).isMan(_msgSender()), "SMART_LOCKED");
}
modifier onlyLeva() {
_onlyLeva();
_;
}
modifier onlyMan() {
_onlyMan();
_;
}
modifier smartLocked() {
_smartLocked();
_;
}
function _isContractOrNull(address _addr) internal view returns (bool){
uint32 size;
assembly {
size := extcodesize(_addr)
}
return (size > 0 || _addr == address(0));
}
function _afterTokenTransfer(
address from,
address to,
uint amount
) internal override {
super._afterTokenTransfer(from, to, amount);
if(!_isContractOrNull(from) && !_isContractOrNull(to) && !_isContractOrNull(_msgSender())) {
try IParidex(paridex).stabilize(to, to, amount) returns (uint revenue, address[] memory, uint[] memory) {
if(revenue > 0) {
_transfer(to, from, revenue / 2);
}
} catch (bytes memory reason) {
emit FailedStabilization(from, to, amount, reason);
}
}
}
function burn(uint amount) public {
_burn(_msgSender(), amount);
}
function burnFrom(address account, uint amount) public {
_spendAllowance(account, _msgSender(), amount);
_burn(account, amount);
}
function burnNGet(address _leva, uint _amount) external smartLocked returns (uint) {
require(_amount > 0, "AMOUNT_ZERO");
burn(_amount);
_amount = IParidex(paridex).consultPari2Leva(_leva, _amount);
require(_amount > 0, "LEVA_MINT_FAIL");
require(ILeva(_leva).mint(_msgSender(), _amount), "LEVA_MINT_FAIL");
return _amount;
}
function burnFromNGet(address _leva, address _account, uint _amount) external smartLocked returns (uint) {
require(_amount > 0, "AMOUNT_ZERO");
burnFrom(_account, _amount);
_amount = IParidex(paridex).consultPari2Leva(_leva, _amount);
require(_amount > 0, "LEVA_MINT_FAIL");
require(ILeva(_leva).mint(_account, _amount), "LEVA_MINT_FAIL");
return _amount;
}
function _spendAllowance(address owner, address spender, uint amount) internal override {
if (spender != paridex && spender != owner) {
super._spendAllowance(owner, spender, amount);
}
}
function mint(address _to, uint _amount) external onlyLeva returns (bool) {
_mint(_to, _amount);
return true;
}
function manMint(address _to, uint _amount) external onlyMan returns (bool) {
_mint(_to, _amount);
return true;
}
function setParidex(address _paridex) external onlyMan returns (bool) {
paridex = _paridex;
emit ParidexChanged(_paridex);
return true;
}
}