Contract Name:
StakingPoolToken
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
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) {
// 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) {
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) {
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) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
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) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
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) {
require(b > 0, "SafeMath: modulo by zero");
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) {
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.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
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) {
require(b > 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "../../utils/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.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 guidelines: functions revert instead
* of 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 {
using SafeMath for uint256;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
/**
* @dev Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
constructor (string memory name_, string memory symbol_) public {
_name = name_;
_symbol = symbol_;
_decimals = 18;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual 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 {_setupDecimals} is
* called.
*
* 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 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:
*
* - `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);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {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].add(addedValue));
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {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) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
/**
* @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);
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This 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 Sets {decimals} to a value other than the default one of 18.
*
* WARNING: This function should only be called from the constructor. Most
* applications that interact with token contracts will not expect
* {decimals} to ever change, and may work incorrectly if it does.
*/
function _setupDecimals(uint8 decimals_) internal virtual {
_decimals = decimals_;
}
/**
* @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 to 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 { }
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.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 SafeMath for uint256;
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'
// solhint-disable-next-line max-line-length
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).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_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
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <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;
// solhint-disable-next-line no-inline-assembly
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");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(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");
// solhint-disable-next-line avoid-low-level-calls
(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");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <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 GSN meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
/// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
/// @dev In the implementation you must pay the pool tokens owed for the swap.
/// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
/// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
/// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
/// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
/// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
/// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
function uniswapV3SwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes calldata data
) external;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.4.0;
/// @title FixedPoint96
/// @notice A library for handling binary fixed point numbers, see https://en.wikipedia.org/wiki/Q_(number_format)
/// @dev Used in SqrtPriceMath.sol
library FixedPoint96 {
uint8 internal constant RESOLUTION = 96;
uint256 internal constant Q96 = 0x1000000000000000000000000;
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Immutable state
/// @notice Functions that return immutable state of the router
interface IPeripheryImmutableState {
/// @return Returns the address of the Uniswap V3 factory
function factory() external view returns (address);
/// @return Returns the address of WETH9
function WETH9() external view returns (address);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.7.5;
pragma abicoder v2;
import '@uniswap/v3-core/contracts/interfaces/callback/IUniswapV3SwapCallback.sol';
/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface ISwapRouter is IUniswapV3SwapCallback {
struct ExactInputSingleParams {
address tokenIn;
address tokenOut;
uint24 fee;
address recipient;
uint256 deadline;
uint256 amountIn;
uint256 amountOutMinimum;
uint160 sqrtPriceLimitX96;
}
/// @notice Swaps `amountIn` of one token for as much as possible of another token
/// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
/// @return amountOut The amount of the received token
function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);
struct ExactInputParams {
bytes path;
address recipient;
uint256 deadline;
uint256 amountIn;
uint256 amountOutMinimum;
}
/// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
/// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
/// @return amountOut The amount of the received token
function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);
struct ExactOutputSingleParams {
address tokenIn;
address tokenOut;
uint24 fee;
address recipient;
uint256 deadline;
uint256 amountOut;
uint256 amountInMaximum;
uint160 sqrtPriceLimitX96;
}
/// @notice Swaps as little as possible of one token for `amountOut` of another token
/// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
/// @return amountIn The amount of the input token
function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);
struct ExactOutputParams {
bytes path;
address recipient;
uint256 deadline;
uint256 amountOut;
uint256 amountInMaximum;
}
/// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
/// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
/// @return amountIn The amount of the input token
function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
}
// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;
/// @title Provides functions for deriving a pool address from the factory, tokens, and the fee
library PoolAddress {
bytes32 internal constant POOL_INIT_CODE_HASH = 0xe34f199b19b2b4f47f68442619d555527d244f78a3297ea89325f843f87b8b54;
/// @notice The identifying key of the pool
struct PoolKey {
address token0;
address token1;
uint24 fee;
}
/// @notice Returns PoolKey: the ordered tokens with the matched fee levels
/// @param tokenA The first token of a pool, unsorted
/// @param tokenB The second token of a pool, unsorted
/// @param fee The fee level of the pool
/// @return Poolkey The pool details with ordered token0 and token1 assignments
function getPoolKey(
address tokenA,
address tokenB,
uint24 fee
) internal pure returns (PoolKey memory) {
if (tokenA > tokenB) (tokenA, tokenB) = (tokenB, tokenA);
return PoolKey({token0: tokenA, token1: tokenB, fee: fee});
}
/// @notice Deterministically computes the pool address given the factory and PoolKey
/// @param factory The Uniswap V3 factory contract address
/// @param key The PoolKey
/// @return pool The contract address of the V3 pool
function computeAddress(address factory, PoolKey memory key) internal pure returns (address pool) {
require(key.token0 < key.token1);
pool = address(
uint256(
keccak256(
abi.encodePacked(
hex'ff',
factory,
keccak256(abi.encode(key.token0, key.token1, key.fee)),
POOL_INIT_CODE_HASH
)
)
)
);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
interface IBARL is IERC20 {
event Burn(address indexed user, uint256 amount);
function burn(uint256 amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
interface IReferral {
function caller() external view returns (address);
function getRelationsREF(
address _wallet
) external view returns (address[2] memory);
function getUserInTeamByIndex(
address _user,
uint256 _index
) external view returns (address);
function isSetted(address) external view returns (bool);
function owner() external view returns (address);
function referralLevel() external view returns (uint256);
function relations(address, uint256) external view returns (address);
function renounceOwnership() external;
function updateSetted(address _address) external;
function setReferral(address _from, address _to) external;
function teamSize(address _user) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
interface IStakingPoolToken {
event Stake(address indexed executor, address indexed user, uint256 amount);
event Unstake(address indexed user, uint256 amount);
function indexFund() external view returns (address);
function stakingToken() external view returns (address);
function poolRewards() external view returns (address);
function stakeUserRestriction() external view returns (address);
function stake(address user, uint256 amount) external;
function unstake(uint256 amount) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
interface ITokenRewards {
event AddShares(address indexed wallet, uint256 amount);
event RemoveShares(address indexed wallet, uint256 amount);
event ClaimReward(address indexed wallet);
event DistributeReward(address indexed wallet, uint256 amount);
event DepositRewards(address indexed wallet, uint256 amount);
event ReferralDistribution(
address indexed wallet,
address indexed referrer,
uint256 level,
uint256 amount
);
function totalShares() external view returns (uint256);
function totalStakers() external view returns (uint256);
function rewardsToken() external view returns (address);
function trackingToken() external view returns (address);
function depositFromDAI(uint256 amount) external;
function depositRewards(uint256 amount) external;
function claimReward(address wallet, address referrer) external;
function setShares(
address wallet,
uint256 amount,
bool sharesRemoving
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
interface IV3TwapUtilities {
function getV3Pool(
address v3Factory,
address token0,
address token1,
uint24 poolFee
) external view returns (address);
function getPoolPriceUSDX96(
address pricePool,
address nativeStablePool,
address WETH9
) external view returns (uint256);
function sqrtPriceX96FromPoolAndInterval(
address pool
) external view returns (uint160);
function priceX96FromSqrtPriceX96(
uint160 sqrtPriceX96
) external pure returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
// ----------------------------------------------------------------------------
// BokkyPooBah's DateTime Library v1.00
//
// A gas-efficient Solidity date and time library
//
// https://github.com/bokkypoobah/BokkyPooBahsDateTimeLibrary
//
// Tested date range 1970/01/01 to 2345/12/31
//
// Conventions:
// Unit | Range | Notes
// :-------- |:-------------:|:-----
// timestamp | >= 0 | Unix timestamp, number of seconds since 1970/01/01 00:00:00 UTC
// year | 1970 ... 2345 |
// month | 1 ... 12 |
// day | 1 ... 31 |
// hour | 0 ... 23 |
// minute | 0 ... 59 |
// second | 0 ... 59 |
// dayOfWeek | 1 ... 7 | 1 = Monday, ..., 7 = Sunday
//
//
// Enjoy. (c) BokkyPooBah / Bok Consulting Pty Ltd 2018.
//
// GNU Lesser General Public License 3.0
// https://www.gnu.org/licenses/lgpl-3.0.en.html
// ----------------------------------------------------------------------------
library BokkyPooBahsDateTimeLibrary {
uint constant SECONDS_PER_DAY = 24 * 60 * 60;
int constant OFFSET19700101 = 2440588;
// ------------------------------------------------------------------------
// Calculate year/month/day from the number of days since 1970/01/01 using
// the date conversion algorithm from
// http://aa.usno.navy.mil/faq/docs/JD_Formula.php
// and adding the offset 2440588 so that 1970/01/01 is day 0
//
// int L = days + 68569 + offset
// int N = 4 * L / 146097
// L = L - (146097 * N + 3) / 4
// year = 4000 * (L + 1) / 1461001
// L = L - 1461 * year / 4 + 31
// month = 80 * L / 2447
// dd = L - 2447 * month / 80
// L = month / 11
// month = month + 2 - 12 * L
// year = 100 * (N - 49) + year + L
// ------------------------------------------------------------------------
function _daysToDate(
uint _days
) internal pure returns (uint year, uint month, uint day) {
int __days = int(_days);
int L = __days + 68569 + OFFSET19700101;
int N = (4 * L) / 146097;
L = L - (146097 * N + 3) / 4;
int _year = (4000 * (L + 1)) / 1461001;
L = L - (1461 * _year) / 4 + 31;
int _month = (80 * L) / 2447;
int _day = L - (2447 * _month) / 80;
L = _month / 11;
_month = _month + 2 - 12 * L;
_year = 100 * (N - 49) + _year + L;
year = uint(_year);
month = uint(_month);
day = uint(_day);
}
function timestampToDate(
uint timestamp
) internal pure returns (uint year, uint month, uint day) {
(year, month, day) = _daysToDate(timestamp / SECONDS_PER_DAY);
}
}
// Website: https://barley.finance/
// Docs: https://docs.barley.finance/
// Twitter: https://twitter.com/Barley_Finance
// Telegram Group: https://t.me/Barley_Finance
// Telegram Channel: https://t.me/BarleyFinance
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
import '@openzeppelin/contracts/token/ERC20/ERC20.sol';
import '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
import './interfaces/IStakingPoolToken.sol';
import './TokenRewards.sol';
contract StakingPoolToken is IStakingPoolToken, ERC20 {
using SafeERC20 for IERC20;
address public override indexFund;
address public override stakingToken;
address public override poolRewards;
address public override stakeUserRestriction;
modifier onlyRestricted() {
require(_msgSender() == stakeUserRestriction, 'RESUSERAUTH');
_;
}
constructor(
string memory _name,
string memory _symbol,
address _dai,
address _stakingToken,
address _rewardsToken,
address _stakeUserRestriction,
IV3TwapUtilities _v3TwapUtilities
) ERC20(_name, _symbol) {
indexFund = _msgSender();
stakingToken = _stakingToken;
stakeUserRestriction = _stakeUserRestriction;
poolRewards = address(
new TokenRewards(_v3TwapUtilities, _dai, address(this), _rewardsToken)
);
}
function stake(address _user, uint256 _amount) external override {
if (stakeUserRestriction != address(0)) {
require(_user == stakeUserRestriction, 'RESTRICT');
}
_mint(_user, _amount);
IERC20(stakingToken).safeTransferFrom(_msgSender(), address(this), _amount);
emit Stake(_msgSender(), _user, _amount);
}
function unstake(uint256 _amount) external override {
_burn(_msgSender(), _amount);
IERC20(stakingToken).safeTransfer(_msgSender(), _amount);
emit Unstake(_msgSender(), _amount);
}
function removeStakeUserRestriction() external onlyRestricted {
stakeUserRestriction = address(0);
}
function setStakeUserRestriction(address _user) external onlyRestricted {
stakeUserRestriction = _user;
}
function _transfer(
address _from,
address _to,
uint256 _amount
) internal virtual override {
super._transfer(_from, _to, _amount);
_afterTokenTransfer(_from, _to, _amount);
}
function _mint(address _to, uint256 _amount) internal override {
super._mint(_to, _amount);
_afterTokenTransfer(address(0), _to, _amount);
}
function _burn(address _from, uint256 _amount) internal override {
super._burn(_from, _amount);
_afterTokenTransfer(_from, address(0), _amount);
}
function _afterTokenTransfer(
address _from,
address _to,
uint256 _amount
) internal {
if (_from != address(0) && _from != address(0xdead)) {
TokenRewards(poolRewards).setShares(_from, _amount, true);
}
if (_to != address(0) && _to != address(0xdead)) {
TokenRewards(poolRewards).setShares(_to, _amount, false);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.6;
pragma abicoder v2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@uniswap/v3-core/contracts/libraries/FixedPoint96.sol";
import "@uniswap/v3-periphery/contracts/interfaces/ISwapRouter.sol";
import "@uniswap/v3-periphery/contracts/interfaces/IPeripheryImmutableState.sol";
import "@uniswap/v3-periphery/contracts/libraries/PoolAddress.sol";
import "./libraries/BokkyPooBahsDateTimeLibrary.sol";
import "./interfaces/IBARL.sol";
import "./interfaces/ITokenRewards.sol";
import "./interfaces/IV3TwapUtilities.sol";
import "./interfaces/IReferral.sol";
contract TokenRewards is ITokenRewards, Context {
using SafeERC20 for IERC20;
address constant V3_ROUTER = 0xE592427A0AEce92De3Edee1F18E0157C05861564;
uint256 constant PRECISION = 10 ** 36;
uint24 constant REWARDS_POOL_FEE = 10000; // 1%
address immutable DAI;
IV3TwapUtilities immutable V3_TWAP_UTILS;
IReferral public referral;
struct Reward {
uint256 excluded;
uint256 realized;
}
address public override trackingToken;
address public override rewardsToken;
uint256 public override totalShares;
uint256 public override totalStakers;
mapping(address => uint256) public shares;
mapping(address => Reward) public rewards;
uint256 _rewardsSwapSlippage = 10; // 1%
uint256 _rewardsPerShare;
uint256 public rewardsDistributed;
uint256 public rewardsDeposited;
mapping(uint256 => uint256) public rewardsDepMonthly;
modifier onlyTrackingToken() {
require(_msgSender() == trackingToken, "UNAUTHORIZED");
_;
}
constructor(
IV3TwapUtilities _v3TwapUtilities,
address _dai,
address _trackingToken,
address _rewardsToken
) {
V3_TWAP_UTILS = _v3TwapUtilities;
DAI = _dai;
trackingToken = _trackingToken;
rewardsToken = _rewardsToken;
}
function updateReferral(address _referral) external {
if (address(referral) == address(0)) {
referral = IReferral(_referral);
} else {
require(_msgSender() == referral.owner(), "UNAUTHORIZED");
referral = IReferral(_referral);
}
}
function setShares(
address _wallet,
uint256 _amount,
bool _sharesRemoving
) external override onlyTrackingToken {
_setShares(_wallet, _amount, _sharesRemoving);
}
function _setShares(
address _wallet,
uint256 _amount,
bool _sharesRemoving
) internal {
if (_sharesRemoving) {
_removeShares(_wallet, _amount);
emit RemoveShares(_wallet, _amount);
} else {
_addShares(_wallet, _amount);
emit AddShares(_wallet, _amount);
}
}
function _addShares(address _wallet, uint256 _amount) internal {
if (shares[_wallet] > 0) {
_distributeReward(_wallet);
}
uint256 sharesBefore = shares[_wallet];
totalShares += _amount;
shares[_wallet] += _amount;
if (sharesBefore == 0 && shares[_wallet] > 0) {
totalStakers++;
}
rewards[_wallet].excluded = _cumulativeRewards(shares[_wallet]);
}
function _removeShares(address _wallet, uint256 _amount) internal {
require(shares[_wallet] > 0 && _amount <= shares[_wallet], "REMOVE");
_distributeReward(_wallet);
totalShares -= _amount;
shares[_wallet] -= _amount;
if (shares[_wallet] == 0) {
totalStakers--;
}
rewards[_wallet].excluded = _cumulativeRewards(shares[_wallet]);
}
function depositFromDAI(uint256 _amountDAIDepositing) external override {
if (_amountDAIDepositing > 0) {
IERC20(DAI).safeTransferFrom(
_msgSender(),
address(this),
_amountDAIDepositing
);
}
uint256 _amountDAI = IERC20(DAI).balanceOf(address(this));
require(_amountDAI > 0, "NEEDDAI");
(address _token0, address _token1) = DAI < rewardsToken
? (DAI, rewardsToken)
: (rewardsToken, DAI);
PoolAddress.PoolKey memory _poolKey = PoolAddress.PoolKey({
token0: _token0,
token1: _token1,
fee: REWARDS_POOL_FEE
});
address _pool = PoolAddress.computeAddress(
IPeripheryImmutableState(V3_ROUTER).factory(),
_poolKey
);
uint160 _rewardsSqrtPriceX96 = V3_TWAP_UTILS
.sqrtPriceX96FromPoolAndInterval(_pool);
uint256 _rewardsPriceX96 = V3_TWAP_UTILS.priceX96FromSqrtPriceX96(
_rewardsSqrtPriceX96
);
uint256 _amountOut = _token0 == DAI
? (_rewardsPriceX96 * _amountDAI) / FixedPoint96.Q96
: (_amountDAI * FixedPoint96.Q96) / _rewardsPriceX96;
uint256 _rewardsBalBefore = IERC20(rewardsToken).balanceOf(
address(this)
);
IERC20(DAI).safeIncreaseAllowance(V3_ROUTER, _amountDAI);
try
ISwapRouter(V3_ROUTER).exactInputSingle(
ISwapRouter.ExactInputSingleParams({
tokenIn: DAI,
tokenOut: rewardsToken,
fee: REWARDS_POOL_FEE,
recipient: address(this),
deadline: block.timestamp,
amountIn: _amountDAI,
amountOutMinimum: (_amountOut *
(1000 - _rewardsSwapSlippage)) / 1000,
sqrtPriceLimitX96: 0
})
)
{
_rewardsSwapSlippage = 10;
_depositRewards(
IERC20(rewardsToken).balanceOf(address(this)) -
_rewardsBalBefore
);
} catch {
_rewardsSwapSlippage += 10;
IERC20(DAI).safeDecreaseAllowance(V3_ROUTER, _amountDAI);
}
}
function depositRewards(uint256 _amount) external override {
require(_amount > 0, "DEPAM");
uint256 _rewardsBalBefore = IERC20(rewardsToken).balanceOf(
address(this)
);
IERC20(rewardsToken).safeTransferFrom(
_msgSender(),
address(this),
_amount
);
_depositRewards(
IERC20(rewardsToken).balanceOf(address(this)) - _rewardsBalBefore
);
}
function _depositRewards(uint256 _amountTotal) internal {
if (_amountTotal == 0) {
return;
}
if (totalShares == 0) {
_burnRewards(_amountTotal);
return;
}
uint256 _burnAmount = _amountTotal / 20; // 5% burn, 95% to rewards
uint256 _depositAmount = _amountTotal - _burnAmount;
_burnRewards(_burnAmount);
rewardsDeposited += _depositAmount;
rewardsDepMonthly[beginningOfMonth(block.timestamp)] += _depositAmount;
_rewardsPerShare += (PRECISION * _depositAmount) / totalShares;
emit DepositRewards(_msgSender(), _depositAmount);
}
function _distributeReward(address _wallet) internal {
if (shares[_wallet] == 0) {
return;
}
uint256 _amount = getUnpaid(_wallet);
rewards[_wallet].realized += _amount;
rewards[_wallet].excluded = _cumulativeRewards(shares[_wallet]);
if (_amount > 0) {
rewardsDistributed += _amount;
address[2] memory referrers = referral.getRelationsREF(_wallet);
uint256 amount2Referrer = (_amount * ((100 - 5) * 7)) / 10000;
IERC20(rewardsToken).safeTransfer(
_wallet,
_amount - amount2Referrer
);
emit DistributeReward(_wallet, _amount);
uint256 amount2Level1 = (amount2Referrer * 5) / 7;
uint256 amount2Level2 = amount2Referrer - amount2Level1;
if (referrers[0] == address(0)) {
_burnRewards(amount2Level1);
} else {
IERC20(rewardsToken).safeTransfer(referrers[0], amount2Level1);
emit ReferralDistribution(
_wallet,
referrers[0],
1,
amount2Level1
);
}
if (referrers[1] == address(0)) {
_burnRewards(amount2Level2);
} else {
IERC20(rewardsToken).safeTransfer(referrers[1], amount2Level2);
emit ReferralDistribution(
_wallet,
referrers[1],
2,
amount2Level2
);
}
}
}
function _burnRewards(uint256 _burnAmount) internal {
try IBARL(rewardsToken).burn(_burnAmount) {} catch {
IERC20(rewardsToken).safeTransfer(address(0xdead), _burnAmount);
}
}
function beginningOfMonth(
uint256 _timestamp
) public pure returns (uint256) {
(, , uint256 _dayOfMonth) = BokkyPooBahsDateTimeLibrary.timestampToDate(
_timestamp
);
return
_timestamp - ((_dayOfMonth - 1) * 1 days) - (_timestamp % 1 days);
}
function claimReward(address _wallet, address _referrer) external override {
if (!referral.isSetted(_wallet) && _referrer != address(0)) {
referral.setReferral(_referrer, _wallet);
}
_distributeReward(_wallet);
emit ClaimReward(_wallet);
}
function getUnpaid(address _wallet) public view returns (uint256) {
if (shares[_wallet] == 0) {
return 0;
}
uint256 earnedRewards = _cumulativeRewards(shares[_wallet]);
uint256 rewardsExcluded = rewards[_wallet].excluded;
if (earnedRewards <= rewardsExcluded) {
return 0;
}
return earnedRewards - rewardsExcluded;
}
function _cumulativeRewards(
uint256 _share
) internal view returns (uint256) {
return (_share * _rewardsPerShare) / PRECISION;
}
}