Contract Name:
RebasingReflectionToken
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @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;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @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 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);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @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:
*
* - `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 {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
interface IUniswapV2Factory
{
function getPair(address _tokenA, address _tokenB) external view returns (address _pair);
function createPair(address _tokenA, address _tokenB) external returns (address _pair);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
interface IUniswapV2Pair
{
function sync() external;
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
interface IUniswapV2Router {
function factory() external view returns (address _factory);
function swapExactTokensForTokens(
uint256 _amountIn,
uint256 _amountOutMin,
address[] calldata _path,
address _to,
uint256 _deadline
) external returns (uint256[] memory _amounts);
function swapExactTokensForETH(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
interface IWrappedToken
{
function deposit() external payable;
function transfer(address to, uint256 value) external returns (bool);
function withdraw(uint256) external;
function approve(address spender, uint256 value) external returns (bool);
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { ERC20 } from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { IUniswapV2Router } from "./IUniswapV2Router.sol";
import { IUniswapV2Factory } from "./IUniswapV2Factory.sol";
import { IUniswapV2Pair } from "./IUniswapV2Pair.sol";
import { IWrappedToken } from "./IWrappedToken.sol";
uint256 constant N = 9;
contract Silo
{
using SafeERC20 for IERC20;
constructor(address[N] memory _rewardTokens)
{
for (uint256 _i = 0; _i < N; _i++) {
IERC20(_rewardTokens[_i]).safeApprove(msg.sender, type(uint256).max);
}
}
}
library LibSilo
{
function createSilo(address[N] memory _rewardTokens) public returns (address _silo)
{
return address(new Silo(_rewardTokens));
}
}
contract RebasingReflectionToken is Ownable, ERC20
{
using Address for address;
using Address for address payable;
using SafeERC20 for IERC20;
struct AccountInfo {
bool exists; // existence flag
bool excludeFromRewards; // whether or not receive rewards
uint256 activeBalance; // 0 or user's balance
uint256[N] rewardDebt; // base for reward distribution
uint256[N] unclaimedReward; // reward balance available for claim
uint256[N] minimumRewardBalanceToClaim; // minimum unclaimed balance to auto claim
}
address constant FURNACE = 0x000000000000000000000000000000000000dEaD;
address constant INTERNAL_ADDRESS = address(1); // used internally to record pending rebase balances
uint256 constant BUY_FEE = 6e16; // 6%
uint256 constant SELL_FEE = 9e16; // 9%
uint256 constant DEFAULT_LAUNCH_TIME = 1740542400; // Oct 7th 2PM UTC
address public burnToken = 0x3Ad2234eBFED9dEEfab94B9719aEbc07f8510D47; // Daddy
bool private bypass_ = false; // internal flag to bypass all token logic
bool private inswap_ = false; // internal flag to bypass additional token transfer logic
address public router; // router V2
address[N] public pairs; // n pairs liquidity pool adddresses
address[][N] public paths; // routes from WMM to reward tokens
uint256 public launchTime = DEFAULT_LAUNCH_TIME; // timestamp when the trading starts
uint256 public totalActiveSupply = 0; // sum of active balances for all 7WMM holders
address[N] public rewardTokens; // n reward tokens
uint256[N] public buybackPercents; // buyback percentage of each token
address public wrappedToken; // WETH
uint256[N] public rewardBalance = [0, 0, 0, 0, 0, 0, 0, 0, 0]; // 8 reward balance
uint256[N] public accRewardPerShare = [0, 0, 0, 0, 0, 0, 0, 0, 0]; // accumulated reward per share (double precision)
uint256 public minimumFeeBalanceToBuyback = 20000; // need to be more than just dust
address public silo; // holds reward balances
address[] public accountIndex; // list of all accounts that ever received WMM
mapping(address => AccountInfo) public accountInfo; // account attributes
function accountIndexLength() external view returns (uint256 _length)
{
return accountIndex.length;
}
function accountRewardInfo(address _account, uint256 _i) external view returns (uint256 _rewardDebt, uint256 _unclaimedReward, uint256 _minimumRewardBalanceToClaim)
{
AccountInfo storage _accountInfo = accountInfo[_account];
return (_accountInfo.rewardDebt[_i], _accountInfo.unclaimedReward[_i], _accountInfo.minimumRewardBalanceToClaim[_i]);
}
constructor(string memory _name, string memory _symbol)
ERC20(_name, _symbol)
{
}
function initialize(uint256 _supply, address[N] memory _rewardTokens, address _router, address _wrappedToken, uint256[N] memory _buybackPercents, address _owner) external
{
require(router == address(0), "already initialized");
router = _router;
address _factory = IUniswapV2Router(_router).factory();
uint256 _totalBuybackPercent = 0;
for (uint256 _i = 0; _i < N; _i++) {
address _rewardToken = _rewardTokens[_i];
uint256 _buybackPercent = _buybackPercents[_i];
address _pair = IUniswapV2Factory(_factory).createPair(_rewardToken, address(this));
address[] memory _path = new address[](2);
_path[0] = address(this);
_path[1] = _rewardToken;
pairs[_i] = _pair;
paths[_i] = _path;
rewardTokens[_i] = _rewardToken;
buybackPercents[_i] = _buybackPercent;
_totalBuybackPercent += _buybackPercent;
}
require(_totalBuybackPercent <= 100e16, "invalid percentages");
wrappedToken = _wrappedToken;
silo = LibSilo.createSilo(_rewardTokens);
_approve(address(this), _router, type(uint256).max);
_mint(_owner, _supply);
}
function updateLaunchTime(uint256 _launchTime) external onlyOwner
{
require(_launchTime > block.timestamp, "invalid time");
launchTime = _launchTime;
emit UpdateLaunchTime(_launchTime);
}
function updateMinimumFeeBalanceToBuyback(uint256 _minimumFeeBalanceToBuyback) external onlyOwner
{
minimumFeeBalanceToBuyback = _minimumFeeBalanceToBuyback;
emit UpdateMinimumFeeBalanceToBuyback(_minimumFeeBalanceToBuyback);
}
function updateMinimumRewardBalanceToClaim(uint256[N] memory _minimumRewardBalanceToClaim) external
{
AccountInfo storage _accountInfo = accountInfo[msg.sender];
_accountInfo.minimumRewardBalanceToClaim = _minimumRewardBalanceToClaim;
emit UpdateMinimumRewardBalanceToClaim(_minimumRewardBalanceToClaim);
}
function updateExcludeFromRewards(address _account, bool _excludeFromRewards) external onlyOwner
{
_updateAccount(_account);
AccountInfo storage _accountInfo = accountInfo[_account];
_accountInfo.excludeFromRewards = _excludeFromRewards;
_postUpdateAccount(_account);
emit UpdateExcludeFromRewards(_account, _excludeFromRewards);
}
function updateExcludeFromRewards(bool _excludeFromRewards) external
{
_updateAccount(msg.sender);
AccountInfo storage _accountInfo = accountInfo[msg.sender];
_accountInfo.excludeFromRewards = _excludeFromRewards;
_postUpdateAccount(msg.sender);
emit UpdateExcludeFromRewards(msg.sender, _excludeFromRewards);
}
function _updateAccount(address _account) internal
{
AccountInfo storage _accountInfo = accountInfo[_account];
if (!_accountInfo.exists) {
accountIndex.push(_account);
_accountInfo.exists = true;
_accountInfo.excludeFromRewards = _account == FURNACE || _account.isContract();
_accountInfo.activeBalance = 0;
_accountInfo.rewardDebt = [0, 0, 0, 0, 0, 0, 0, 0, 0];
_accountInfo.unclaimedReward = [0, 0, 0, 0, 0, 0, 0, 0, 0];
_accountInfo.minimumRewardBalanceToClaim = [1, 1, 1, 1, 1, 1, 1, 1, 1];
return;
}
uint256 _activeBalance = _accountInfo.activeBalance;
if (_activeBalance > 0) {
for (uint256 _i = 0; _i < N; _i++) {
uint256 _rewardDebt = _activeBalance * accRewardPerShare[_i] / 1e36;
if (_rewardDebt > _accountInfo.rewardDebt[_i]) {
uint256 _rewardAmount = _rewardDebt - _accountInfo.rewardDebt[_i];
_accountInfo.unclaimedReward[_i] += _rewardAmount;
_accountInfo.rewardDebt[_i] = _rewardDebt;
}
}
}
for (uint256 _i = 0; _i < N; _i++) {
uint256 _unclaimedReward = _accountInfo.unclaimedReward[_i];
if (_unclaimedReward >= _accountInfo.minimumRewardBalanceToClaim[_i]) {
_accountInfo.unclaimedReward[_i] = 0;
rewardBalance[_i] -= _unclaimedReward;
address _rewardToken = rewardTokens[_i];
if (_rewardToken != wrappedToken) {
IERC20(_rewardToken).safeTransferFrom(silo, _account, _unclaimedReward);
} else {
IERC20(_rewardToken).safeTransferFrom(silo, address(this), _unclaimedReward);
IWrappedToken(_rewardToken).withdraw(_unclaimedReward);
payable(_account).sendValue(_unclaimedReward);
}
}
}
}
function _postUpdateAccount(address _account) internal
{
AccountInfo storage _accountInfo = accountInfo[_account];
uint256 _oldActiveBalance = _accountInfo.activeBalance;
uint256 _newActiveBalance = _accountInfo.excludeFromRewards ? 0 : balanceOf(_account);
if (_newActiveBalance != _oldActiveBalance) {
_accountInfo.activeBalance = _newActiveBalance;
for (uint256 _i = 0; _i < N; _i++) {
_accountInfo.rewardDebt[_i] = _newActiveBalance * accRewardPerShare[_i] / 1e36;
}
totalActiveSupply -= _oldActiveBalance;
totalActiveSupply += _newActiveBalance;
}
}
function _transfer(address _from, address _to, uint256 _amount) internal override
{
if (bypass_) {
// internal transfer
super._transfer(_from, _to, _amount);
return;
}
if (inswap_) {
// fee selling transfer
super._transfer(_from, _to, _amount);
return;
}
bool _buying = false;
bool _selling = false;
for (uint256 _i = 0; _i < N; _i++) {
_buying = _buying || _from == pairs[_i];
_selling = _selling || _to == pairs[_i];
}
if (_buying || _selling) {
// buy/sell
bool _restricted = block.timestamp < launchTime && (_buying ? _to : _from) != owner();
require(!_restricted, "unavailable");
// If the sender is not the owner then fee applies
uint256 _feeAmount = (_buying ? _to : _from) != owner() ? _amount * (_buying ? BUY_FEE : SELL_FEE) / 100e16 : 0;
super._transfer(_from, _to, _amount - _feeAmount);
super._transfer(_from, address(this), _feeAmount);
return;
}
// regular transfer
super._transfer(_from, _to, _amount);
// piggyback buyback operation
uint256 _balance = balanceOf(address(this));
if (_balance >= minimumFeeBalanceToBuyback) {
inswap_ = true;
_approve(address(this), router, _balance);
for (uint256 _i = 0; _i < N; _i ++) {
uint256 _swapAmount = _balance * buybackPercents[_i] / 100e16;
// If the buy back token is the burn token, send it to the furnace
if(paths[_i][1] == burnToken) {
IUniswapV2Router(router).swapExactTokensForTokens(_swapAmount, 0, paths[_i], FURNACE, block.timestamp);
} else {
IUniswapV2Router(router).swapExactTokensForTokens(_swapAmount, 0, paths[_i], silo, block.timestamp);
}
IUniswapV2Pair(pairs[_i]).sync();
}
inswap_ = false;
if (totalActiveSupply > 0) {
for (uint256 _i = 0; _i < N; _i++) {
uint256 _rewardBalance = IERC20(rewardTokens[_i]).balanceOf(silo);
uint256 _rewardAmount = _rewardBalance - rewardBalance[_i];
if (_rewardAmount > 0) {
rewardBalance[_i] = _rewardBalance;
accRewardPerShare[_i] += _rewardAmount * 1e36 / totalActiveSupply;
}
}
}
}
}
function _beforeTokenTransfer(address _from, address _to, uint256 _amount) internal override
{
if (bypass_) return;
if (_from != address(0)) {
_updateAccount(_from);
}
if (_to != address(0)) {
require(_to != INTERNAL_ADDRESS, "invalid address");
_updateAccount(_to);
}
_amount; // silences warning
}
function _afterTokenTransfer(address _from, address _to, uint256 _amount) internal override
{
if (bypass_) return;
if (_from != address(0)) {
_postUpdateAccount(_from);
}
if (_to != address(0)) {
_postUpdateAccount(_to);
}
_amount; // silences warning
}
receive() external payable {}
event UpdateLaunchTime(uint256 _launchTime);
event UpdateMinimumFeeBalanceToBuyback(uint256 _minimumFeeBalanceToBuyback);
event UpdateMinimumRewardBalanceToClaim(uint256[N] _minimumRewardBalanceToClaim);
event UpdateExcludeFromRewards(address indexed _account, bool indexed _excludeFromRewards);
}