Contract Name:
BrewlabsFarm
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
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 (last updated v4.8.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// 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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.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));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @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 (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @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
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or 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 {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// 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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {SafeERC20, IERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./libs/IUniRouter02.sol";
import "./libs/IWETH.sol";
// BrewlabsFarm is the master of brews. He can make brews and he is a fair guy.
//
// Note that it's ownable and the owner wields tremendous power. The ownership
// will be transferred to a governance smart contract once brews is sufficiently
// distributed and the community can show to govern itself.
//
// Have fun reading it. Hopefully it's bug-free. God bless.
contract BrewlabsFarm is Ownable, ReentrancyGuard {
using SafeERC20 for IERC20;
// Info of each user.
struct UserInfo {
uint256 amount; // How many LP tokens the user has provided.
uint256 rewardDebt; // Reward debt. See explanation below.
uint256 reflectionDebt; // Reflection debt. See explanation below.
//
// We do some fancy math here. Basically, any point in time, the amount of brewss
// entitled to a user but is pending to be distributed is:
//
// pending reward = (user.amount * pool.accTokenPerShare) - user.rewardDebt
//
// Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens:
// 1. The pool's `accTokenPerShare` (and `lastRewardBlock`) gets updated.
// 2. User receives the pending reward sent to his/her address.
// 3. User's `amount` gets updated.
// 4. User's `rewardDebt` gets updated.
}
// Info of each pool.
struct PoolInfo {
IERC20 lpToken; // Address of LP token contract.
uint256 allocPoint; // How many allocation points assigned to this pool. brewss to distribute per block.
uint256 duration;
uint256 startBlock;
uint256 bonusEndBlock;
uint256 lastRewardBlock; // Last block number that brewss distribution occurs.
uint256 accTokenPerShare; // Accumulated brewss per share, times 1e12. See below.
uint256 accReflectionPerShare; // Accumulated brewss per share, times 1e12. See below.
uint256 lastReflectionPerPoint;
uint16 depositFee; // Deposit fee in basis points
uint16 withdrawFee; // Deposit fee in basis points
}
struct SwapSetting {
IERC20 lpToken;
address swapRouter;
address[] earnedToToken0;
address[] earnedToToken1;
address[] reflectionToToken0;
address[] reflectionToToken1;
bool enabled;
}
// The brews TOKEN!
IERC20 public brews;
// Reflection Token
address public reflectionToken;
uint256 public accReflectionPerPoint;
bool public hasDividend;
bool public autoAdjustableForRewardRate = false;
// brews tokens created per block.
uint256 public rewardPerBlock;
// Bonus muliplier for early brews makers.
uint256 public constant BONUS_MULTIPLIER = 1;
uint256 public constant PERCENT_PRECISION = 10000;
uint256 private constant BLOCKS_PER_DAY = 6426;
// Deposit Fee address
address public feeAddress;
address public treasury = 0x64961Ffd0d84b2355eC2B5d35B0d8D8825A774dc;
uint256 public performanceFee = 0.00089 ether;
uint256 public rewardFee = 0;
// Info of each pool.
PoolInfo[] public poolInfo;
SwapSetting[] public swapSettings;
uint256[] public totalStaked;
// Info of each user that stakes LP tokens.
mapping(uint256 => mapping(address => UserInfo)) public userInfo;
// Total allocation points. Must be the sum of all allocation points in all pools.
uint256 public totalAllocPoint = 0;
// The block number when brews mining starts.
uint256 public startBlock;
uint256 private totalEarned;
uint256 private totalRewardStaked;
uint256 private totalReflectionStaked;
uint256 private totalReflections;
uint256 private reflectionDebt;
uint256 private paidRewards;
uint256 private shouldTotalPaid;
event Deposit(address indexed user, uint256 indexed pid, uint256 amount);
event Withdraw(address indexed user, uint256 indexed pid, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount);
event SetPool(
uint256 pid,
address indexed lpToken,
uint256 allocPoint,
uint256 duration,
uint256 depositFee,
uint256 withdrawFee,
uint256 startBlock,
uint256 endBlock
);
event SetFeeAddress(address indexed user, address indexed newAddress);
event SetBuyBackWallet(address indexed user, address newAddress);
event SetPerformanceFee(uint256 fee);
event SetRewardFee(uint256 fee);
event SetAutoAdjustableForRewardRate(bool status);
event UpdateEmissionRate(address indexed user, uint256 rewardPerBlock);
constructor(IERC20 _brews, address _reflectionToken, uint256 _rewardPerBlock, bool _hasDividend) {
brews = _brews;
reflectionToken = _reflectionToken;
rewardPerBlock = _rewardPerBlock;
hasDividend = _hasDividend;
feeAddress = msg.sender;
startBlock = block.number + 30 * BLOCKS_PER_DAY; // after 30 days
}
mapping(IERC20 => bool) public poolExistence;
modifier nonDuplicated(IERC20 _lpToken) {
require(poolExistence[_lpToken] == false, "nonDuplicated: duplicated");
_;
}
function poolLength() external view returns (uint256) {
return poolInfo.length;
}
// Add a new lp to the pool. Can only be called by the owner.
function add(
uint256 _allocPoint,
IERC20 _lpToken,
uint16 _depositFee,
uint16 _withdrawFee,
uint256 _duration,
bool _withUpdate
) external onlyOwner nonDuplicated(_lpToken) {
require(_depositFee <= PERCENT_PRECISION, "add: invalid deposit fee basis points");
require(_withdrawFee <= PERCENT_PRECISION, "add: invalid withdraw fee basis points");
if (_withUpdate) {
massUpdatePools();
}
uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock;
totalAllocPoint = totalAllocPoint + _allocPoint;
poolExistence[_lpToken] = true;
poolInfo.push(
PoolInfo({
lpToken: _lpToken,
allocPoint: _allocPoint,
duration: _duration,
startBlock: lastRewardBlock,
bonusEndBlock: lastRewardBlock + _duration * BLOCKS_PER_DAY,
lastRewardBlock: lastRewardBlock,
accTokenPerShare: 0,
accReflectionPerShare: 0,
lastReflectionPerPoint: 0,
depositFee: _depositFee,
withdrawFee: _withdrawFee
})
);
swapSettings.push();
swapSettings[swapSettings.length - 1].lpToken = _lpToken;
totalStaked.push(0);
emit SetPool(
poolInfo.length - 1,
address(_lpToken),
_allocPoint,
_duration,
_depositFee,
_withdrawFee,
lastRewardBlock,
lastRewardBlock + _duration * BLOCKS_PER_DAY
);
}
// Update the given pool's brews allocation point and deposit fee. Can only be called by the owner.
function set(
uint256 _pid,
uint256 _allocPoint,
uint16 _depositFee,
uint16 _withdrawFee,
uint256 _duration,
bool _withUpdate
) external onlyOwner {
require(_depositFee <= PERCENT_PRECISION, "set: invalid deposit fee basis points");
require(_withdrawFee <= PERCENT_PRECISION, "set: invalid withdraw fee basis points");
if (poolInfo[_pid].bonusEndBlock > block.number) {
require(poolInfo[_pid].startBlock + _duration * BLOCKS_PER_DAY > block.number, "set: invalid duration");
}
if (_withUpdate) {
massUpdatePools();
}
totalAllocPoint = totalAllocPoint - poolInfo[_pid].allocPoint + _allocPoint;
poolInfo[_pid].allocPoint = _allocPoint;
poolInfo[_pid].depositFee = _depositFee;
poolInfo[_pid].withdrawFee = _withdrawFee;
poolInfo[_pid].duration = _duration;
if (poolInfo[_pid].bonusEndBlock < block.number) {
if (!_withUpdate) updatePool(_pid);
poolInfo[_pid].startBlock = block.number;
poolInfo[_pid].bonusEndBlock = block.number + _duration * BLOCKS_PER_DAY;
} else {
poolInfo[_pid].bonusEndBlock = poolInfo[_pid].startBlock + _duration * BLOCKS_PER_DAY;
}
emit SetPool(
_pid,
address(poolInfo[_pid].lpToken),
_allocPoint,
_duration,
_depositFee,
_withdrawFee,
poolInfo[_pid].startBlock,
poolInfo[_pid].bonusEndBlock
);
}
// Update the given pool's compound parameters. Can only be called by the owner.
function setSwapSetting(
uint256 _pid,
address _uniRouter,
address[] memory _earnedToToken0,
address[] memory _earnedToToken1,
address[] memory _reflectionToToken0,
address[] memory _reflectionToToken1,
bool _enabled
) external onlyOwner {
SwapSetting storage swapSetting = swapSettings[_pid];
swapSetting.enabled = _enabled;
swapSetting.swapRouter = _uniRouter;
swapSetting.earnedToToken0 = _earnedToToken0;
swapSetting.earnedToToken1 = _earnedToToken1;
swapSetting.reflectionToToken0 = _reflectionToToken0;
swapSetting.reflectionToToken1 = _reflectionToToken1;
}
// Return reward multiplier over the given _from to _to block.
function getMultiplier(uint256 _from, uint256 _to, uint256 _endBlock) public pure returns (uint256) {
if (_from > _endBlock) return 0;
if (_to > _endBlock) {
return (_endBlock - _from) * BONUS_MULTIPLIER;
}
return (_to - _from) * BONUS_MULTIPLIER;
}
// View function to see pending brews on frontend.
function pendingRewards(uint256 _pid, address _user) external view returns (uint256) {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accTokenPerShare = pool.accTokenPerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (block.number > pool.lastRewardBlock && lpSupply > 0 && totalAllocPoint > 0) {
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number, pool.bonusEndBlock);
uint256 brewsReward = (multiplier * rewardPerBlock * pool.allocPoint) / totalAllocPoint;
accTokenPerShare += (brewsReward * 1e12) / lpSupply;
}
return (user.amount * accTokenPerShare) / 1e12 - user.rewardDebt;
}
function pendingReflections(uint256 _pid, address _user) external view returns (uint256) {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][_user];
uint256 accReflectionPerShare = pool.accReflectionPerShare;
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (reflectionToken == address(pool.lpToken)) lpSupply = totalReflectionStaked;
if (block.number > pool.lastRewardBlock && lpSupply > 0 && hasDividend && totalAllocPoint > 0) {
uint256 reflectionAmt = availableDividendTokens();
if (reflectionAmt > totalReflections) {
reflectionAmt -= totalReflections;
} else {
reflectionAmt = 0;
}
uint256 _accReflectionPerPoint = accReflectionPerPoint + (reflectionAmt * 1e12) / totalAllocPoint;
accReflectionPerShare = pool.accReflectionPerShare
+ ((pool.allocPoint * (_accReflectionPerPoint - pool.lastReflectionPerPoint)) / lpSupply);
}
return (user.amount * accReflectionPerShare) / 1e12 - user.reflectionDebt;
}
// Update reward variables for all pools. Be careful of gas spending!
function massUpdatePools() public {
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; pid++) {
updatePool(pid);
}
}
// Update reward variables of the given pool to be up-to-date.
function updatePool(uint256 _pid) public {
PoolInfo storage pool = poolInfo[_pid];
if (block.number <= pool.lastRewardBlock) {
return;
}
uint256 lpSupply = pool.lpToken.balanceOf(address(this));
if (address(pool.lpToken) == address(brews)) lpSupply = totalRewardStaked;
if (address(pool.lpToken) == reflectionToken) lpSupply = totalReflectionStaked;
if (lpSupply == 0 || pool.allocPoint == 0) {
pool.lastRewardBlock = block.number;
return;
}
uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number, pool.bonusEndBlock);
uint256 brewsReward = (multiplier * rewardPerBlock * pool.allocPoint) / totalAllocPoint;
pool.accTokenPerShare += (brewsReward * 1e12) / lpSupply;
if (hasDividend) {
uint256 reflectionAmt = availableDividendTokens();
if (reflectionAmt > totalReflections) {
reflectionAmt -= totalReflections;
} else {
reflectionAmt = 0;
}
accReflectionPerPoint += (reflectionAmt * 1e12) / totalAllocPoint;
pool.accReflectionPerShare +=
(pool.allocPoint * (accReflectionPerPoint - pool.lastReflectionPerPoint)) / (lpSupply);
pool.lastReflectionPerPoint = accReflectionPerPoint;
totalReflections += reflectionAmt;
}
pool.lastRewardBlock = block.number;
shouldTotalPaid = shouldTotalPaid + brewsReward;
}
// Deposit LP tokens to BrewlabsFarm for brews allocation.
function deposit(uint256 _pid, uint256 _amount) external payable nonReentrant {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
_transferPerformanceFee();
massUpdatePools();
if (user.amount > 0) {
uint256 pending = (user.amount * pool.accTokenPerShare) / 1e12 - user.rewardDebt;
if (pending > 0) {
require(availableRewardTokens() >= pending, "Insufficient reward tokens");
paidRewards = paidRewards + pending;
pending = (pending * (PERCENT_PRECISION - rewardFee)) / PERCENT_PRECISION;
safeTokenTransfer(msg.sender, pending);
if (totalEarned > pending) {
totalEarned = totalEarned - pending;
} else {
totalEarned = 0;
}
}
uint256 pendingReflection = (user.amount * pool.accReflectionPerShare) / 1e12 - user.reflectionDebt;
if (pendingReflection > 0 && hasDividend) {
if (address(reflectionToken) == address(0x0)) {
payable(msg.sender).transfer(_estimateDividendAmount(pendingReflection));
} else {
IERC20(reflectionToken).safeTransfer(msg.sender, _estimateDividendAmount(pendingReflection));
}
totalReflections -= pendingReflection;
}
}
uint256 realAmount = _amount;
if (_amount > 0) {
uint256 beforeAmt = pool.lpToken.balanceOf(address(this));
pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount);
uint256 afterAmt = pool.lpToken.balanceOf(address(this));
uint256 amount = afterAmt - beforeAmt;
if (pool.depositFee > 0) {
uint256 depositFee = (amount * pool.depositFee) / PERCENT_PRECISION;
pool.lpToken.safeTransfer(feeAddress, depositFee);
user.amount += amount - depositFee;
realAmount -= depositFee;
} else {
user.amount = user.amount + amount;
}
_calculateTotalStaked(_pid, pool.lpToken, amount, true);
}
user.rewardDebt = (user.amount * pool.accTokenPerShare) / 1e12;
user.reflectionDebt = (user.amount * pool.accReflectionPerShare) / 1e12;
emit Deposit(msg.sender, _pid, realAmount);
if (pool.bonusEndBlock <= block.number) {
totalAllocPoint = totalAllocPoint - pool.allocPoint;
pool.allocPoint = 0;
rewardPerBlock = 0;
emit UpdateEmissionRate(msg.sender, rewardPerBlock);
} else if ((rewardFee > 0 && _amount > 0) || autoAdjustableForRewardRate) {
_updateRewardRate();
}
}
// Withdraw LP tokens from BrewlabsFarm.
function withdraw(uint256 _pid, uint256 _amount) external payable nonReentrant {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
require(user.amount >= _amount, "withdraw: not good");
require(_amount > 0, "Amount should be greator than 0");
_transferPerformanceFee();
if (pool.bonusEndBlock < block.number) {
massUpdatePools();
totalAllocPoint = totalAllocPoint - pool.allocPoint;
pool.allocPoint = 0;
rewardPerBlock = 0;
emit UpdateEmissionRate(msg.sender, rewardPerBlock);
} else {
updatePool(_pid);
}
uint256 pending = (user.amount * pool.accTokenPerShare) / 1e12 - user.rewardDebt;
if (pending > 0) {
require(availableRewardTokens() >= pending, "Insufficient reward tokens");
paidRewards = paidRewards + pending;
pending = (pending * (PERCENT_PRECISION - rewardFee)) / PERCENT_PRECISION;
safeTokenTransfer(msg.sender, pending);
if (totalEarned > pending) {
totalEarned = totalEarned - pending;
} else {
totalEarned = 0;
}
}
uint256 pendingReflection = (user.amount * pool.accReflectionPerShare) / 1e12 - user.reflectionDebt;
if (pendingReflection > 0 && hasDividend) {
if (address(reflectionToken) == address(0x0)) {
payable(msg.sender).transfer(_estimateDividendAmount(pendingReflection));
} else {
IERC20(reflectionToken).safeTransfer(msg.sender, _estimateDividendAmount(pendingReflection));
}
totalReflections -= pendingReflection;
}
if (_amount > 0) {
user.amount = user.amount - _amount;
if (pool.withdrawFee > 0) {
uint256 withdrawFee = (_amount * pool.withdrawFee) / PERCENT_PRECISION;
pool.lpToken.safeTransfer(feeAddress, withdrawFee);
pool.lpToken.safeTransfer(address(msg.sender), _amount - withdrawFee);
} else {
pool.lpToken.safeTransfer(address(msg.sender), _amount);
}
_calculateTotalStaked(_pid, pool.lpToken, _amount, false);
}
user.rewardDebt = (user.amount * pool.accTokenPerShare) / 1e12;
user.reflectionDebt = (user.amount * pool.accReflectionPerShare) / 1e12;
emit Withdraw(msg.sender, _pid, _amount);
if (autoAdjustableForRewardRate) _updateRewardRate();
}
function claimReward(uint256 _pid) external payable nonReentrant {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
if (user.amount == 0) return;
_transferPerformanceFee();
updatePool(_pid);
uint256 pending = (user.amount * pool.accTokenPerShare) / 1e12 - user.rewardDebt;
if (pending > 0) {
require(availableRewardTokens() >= pending, "Insufficient reward tokens");
paidRewards = paidRewards + pending;
pending = (pending * (PERCENT_PRECISION - rewardFee)) / PERCENT_PRECISION;
safeTokenTransfer(msg.sender, pending);
if (totalEarned > pending) {
totalEarned = totalEarned - pending;
} else {
totalEarned = 0;
}
}
user.rewardDebt = (user.amount * pool.accTokenPerShare) / 1e12;
}
function compoundReward(uint256 _pid) external payable nonReentrant {
PoolInfo storage pool = poolInfo[_pid];
SwapSetting memory swapSetting = swapSettings[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
if (user.amount == 0) return;
if (!swapSetting.enabled) return;
_transferPerformanceFee();
updatePool(_pid);
uint256 pending = (user.amount * pool.accTokenPerShare) / 1e12 - user.rewardDebt;
if (pending > 0) {
require(availableRewardTokens() >= pending, "Insufficient reward tokens");
paidRewards = paidRewards + pending;
pending = (pending * (PERCENT_PRECISION - rewardFee)) / PERCENT_PRECISION;
if (totalEarned > pending) {
totalEarned = totalEarned - pending;
} else {
totalEarned = 0;
}
}
if (address(brews) != address(pool.lpToken)) {
uint256 tokenAmt = pending / 2;
uint256 tokenAmt0 = tokenAmt;
address token0 = address(brews);
if (swapSetting.earnedToToken0.length > 0) {
token0 = swapSetting.earnedToToken0[swapSetting.earnedToToken0.length - 1];
tokenAmt0 = _safeSwap(swapSetting.swapRouter, tokenAmt, swapSetting.earnedToToken0, address(this));
}
uint256 tokenAmt1 = tokenAmt;
address token1 = address(brews);
if (swapSetting.earnedToToken1.length > 0) {
token1 = swapSetting.earnedToToken1[swapSetting.earnedToToken1.length - 1];
tokenAmt1 = _safeSwap(swapSetting.swapRouter, tokenAmt, swapSetting.earnedToToken1, address(this));
}
uint256 beforeAmt = pool.lpToken.balanceOf(address(this));
_addLiquidity(swapSetting.swapRouter, token0, token1, tokenAmt0, tokenAmt1, address(this));
uint256 afterAmt = pool.lpToken.balanceOf(address(this));
pending = afterAmt - beforeAmt;
}
user.amount = user.amount + pending;
user.rewardDebt = (user.amount * pool.accTokenPerShare) / 1e12;
user.reflectionDebt = user.reflectionDebt + (pending * pool.accReflectionPerShare) / 1e12;
_calculateTotalStaked(_pid, pool.lpToken, pending, true);
emit Deposit(msg.sender, _pid, pending);
}
function claimDividend(uint256 _pid) external payable nonReentrant {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
if (user.amount == 0) return;
if (!hasDividend) return;
_transferPerformanceFee();
updatePool(_pid);
uint256 pendingReflection = (user.amount * pool.accReflectionPerShare) / 1e12 - user.reflectionDebt;
if (pendingReflection > 0) {
if (address(reflectionToken) == address(0x0)) {
payable(msg.sender).transfer(_estimateDividendAmount(pendingReflection));
} else {
IERC20(reflectionToken).safeTransfer(msg.sender, _estimateDividendAmount(pendingReflection));
}
totalReflections = totalReflections - pendingReflection;
}
user.reflectionDebt = (user.amount * pool.accReflectionPerShare) / 1e12;
}
function compoundDividend(uint256 _pid) external payable nonReentrant {
PoolInfo storage pool = poolInfo[_pid];
SwapSetting memory swapSetting = swapSettings[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
if (user.amount == 0) return;
if (!hasDividend) return;
_transferPerformanceFee();
updatePool(_pid);
uint256 _pending = (user.amount * pool.accReflectionPerShare) / 1e12 - user.reflectionDebt;
uint256 pending = _estimateDividendAmount(_pending);
totalReflections = totalReflections - _pending;
if (reflectionToken != address(pool.lpToken)) {
if (reflectionToken == address(0x0)) {
address wethAddress = IUniRouter02(swapSetting.swapRouter).WETH();
IWETH(wethAddress).deposit{value: pending}();
}
uint256 tokenAmt = pending / 2;
uint256 tokenAmt0 = tokenAmt;
address token0 = reflectionToken;
if (swapSetting.reflectionToToken0.length > 0) {
token0 = swapSetting.reflectionToToken0[swapSetting.reflectionToToken0.length - 1];
tokenAmt0 = _safeSwap(swapSetting.swapRouter, tokenAmt, swapSetting.reflectionToToken0, address(this));
}
uint256 tokenAmt1 = tokenAmt;
address token1 = reflectionToken;
if (swapSetting.reflectionToToken1.length > 0) {
token0 = swapSetting.reflectionToToken1[swapSetting.reflectionToToken1.length - 1];
tokenAmt1 = _safeSwap(swapSetting.swapRouter, tokenAmt, swapSetting.reflectionToToken1, address(this));
}
uint256 beforeAmt = pool.lpToken.balanceOf(address(this));
_addLiquidity(swapSetting.swapRouter, token0, token1, tokenAmt0, tokenAmt1, address(this));
uint256 afterAmt = pool.lpToken.balanceOf(address(this));
pending = afterAmt - beforeAmt;
}
user.amount = user.amount + pending;
user.rewardDebt = user.rewardDebt + (pending * pool.accTokenPerShare) / 1e12;
user.reflectionDebt = (user.amount * pool.accReflectionPerShare) / 1e12;
_calculateTotalStaked(_pid, pool.lpToken, pending, true);
emit Deposit(msg.sender, _pid, pending);
}
// Withdraw without caring about rewards. EMERGENCY ONLY.
function emergencyWithdraw(uint256 _pid) external nonReentrant {
PoolInfo storage pool = poolInfo[_pid];
UserInfo storage user = userInfo[_pid][msg.sender];
uint256 amount = user.amount;
user.amount = 0;
user.rewardDebt = 0;
user.reflectionDebt = 0;
pool.lpToken.safeTransfer(address(msg.sender), amount);
_calculateTotalStaked(_pid, pool.lpToken, amount, false);
emit EmergencyWithdraw(msg.sender, _pid, amount);
}
function _transferPerformanceFee() internal {
require(msg.value >= performanceFee, "should pay small gas");
payable(treasury).transfer(performanceFee);
if (msg.value > performanceFee) {
payable(msg.sender).transfer(msg.value - performanceFee);
}
}
function _calculateTotalStaked(uint256 _pid, IERC20 _lpToken, uint256 _amount, bool _deposit) internal {
if (_deposit) {
totalStaked[_pid] = totalStaked[_pid] + _amount;
if (address(_lpToken) == address(brews)) {
totalRewardStaked = totalRewardStaked + _amount;
}
if (address(_lpToken) == reflectionToken) {
totalReflectionStaked = totalReflectionStaked + _amount;
}
} else {
totalStaked[_pid] = totalStaked[_pid] - _amount;
if (address(_lpToken) == address(brews)) {
if (totalRewardStaked < _amount) totalRewardStaked = _amount;
totalRewardStaked = totalRewardStaked - _amount;
}
if (address(_lpToken) == reflectionToken) {
if (totalReflectionStaked < _amount) totalReflectionStaked = _amount;
totalReflectionStaked = totalReflectionStaked - _amount;
}
}
}
function _estimateDividendAmount(uint256 amount) internal view returns (uint256) {
uint256 dTokenBal = availableDividendTokens();
if (amount > totalReflections) amount = totalReflections;
if (amount > dTokenBal) amount = dTokenBal;
return amount;
}
/**
* @notice Available amount of reward token
*/
function availableRewardTokens() public view returns (uint256) {
if (address(brews) == reflectionToken && hasDividend) return totalEarned;
uint256 _amount = brews.balanceOf(address(this));
return _amount - totalRewardStaked;
}
/**
* @notice Available amount of reflection token
*/
function availableDividendTokens() public view returns (uint256) {
if (hasDividend == false) return 0;
if (address(reflectionToken) == address(0x0)) {
return address(this).balance;
}
uint256 _amount = IERC20(reflectionToken).balanceOf(address(this));
if (address(reflectionToken) == address(brews)) {
if (_amount < totalEarned) return 0;
_amount = _amount - totalEarned;
}
return _amount - totalReflectionStaked;
}
function insufficientRewards() external view returns (uint256) {
uint256 adjustedShouldTotalPaid = shouldTotalPaid;
uint256 remainRewards = availableRewardTokens() + paidRewards;
uint256 length = poolInfo.length;
for (uint256 pid = 0; pid < length; pid++) {
PoolInfo memory pool = poolInfo[pid];
if (startBlock == 0) {
adjustedShouldTotalPaid +=
(rewardPerBlock * pool.allocPoint * pool.duration * BLOCKS_PER_DAY) / totalAllocPoint;
} else {
uint256 multiplier = getMultiplier(pool.lastRewardBlock, pool.bonusEndBlock, pool.bonusEndBlock);
adjustedShouldTotalPaid += (multiplier * rewardPerBlock * pool.allocPoint) / totalAllocPoint;
}
}
if (remainRewards >= adjustedShouldTotalPaid) return 0;
return adjustedShouldTotalPaid - remainRewards;
}
// Safe brews transfer function, just in case if rounding error causes pool to not have enough brewss.
function safeTokenTransfer(address _to, uint256 _amount) internal {
uint256 brewsBal = brews.balanceOf(address(this));
bool transferSuccess = false;
if (_amount > brewsBal) {
transferSuccess = brews.transfer(_to, brewsBal);
} else {
transferSuccess = brews.transfer(_to, _amount);
}
require(transferSuccess, "safeTokenTransfer: transfer failed");
}
function setFeeAddress(address _feeAddress) external onlyOwner {
feeAddress = _feeAddress;
emit SetFeeAddress(msg.sender, _feeAddress);
}
function setPerformanceFee(uint256 _fee) external {
require(msg.sender == treasury, "setPerformanceFee: FORBIDDEN");
performanceFee = _fee;
emit SetPerformanceFee(_fee);
}
function setRewardFee(uint256 _fee) external onlyOwner {
require(_fee < PERCENT_PRECISION, "setRewardFee: invalid percentage");
rewardFee = _fee;
emit SetRewardFee(_fee);
}
function setBuyBackWallet(address _addr) external {
require(msg.sender == treasury, "setBuyBackWallet: FORBIDDEN");
treasury = _addr;
emit SetBuyBackWallet(msg.sender, _addr);
}
function setAutoAdjustableForRewardRate(bool _status) external onlyOwner {
autoAdjustableForRewardRate = _status;
emit SetAutoAdjustableForRewardRate(_status);
}
//Brews has to add hidden dummy pools inorder to alter the emission, here we make it simple and transparent to all.
function updateEmissionRate(uint256 _rewardPerBlock) external onlyOwner {
massUpdatePools();
rewardPerBlock = _rewardPerBlock;
emit UpdateEmissionRate(msg.sender, _rewardPerBlock);
}
function updateStartBlock(uint256 _startBlock) external onlyOwner {
require(startBlock > block.number, "farm is running now");
require(_startBlock > block.number, "should be greater than current block");
startBlock = _startBlock;
for (uint256 pid = 0; pid < poolInfo.length; pid++) {
poolInfo[pid].startBlock = startBlock;
poolInfo[pid].lastRewardBlock = startBlock;
poolInfo[pid].bonusEndBlock = startBlock + poolInfo[pid].duration * BLOCKS_PER_DAY;
}
}
/**
* @notice Deposit reward token
* @dev Only call by owner. Needs to be for deposit of reward token when reflection token is same with reward token.
*/
function depositRewards(uint256 _amount) external nonReentrant {
require(_amount > 0);
uint256 beforeAmt = brews.balanceOf(address(this));
brews.safeTransferFrom(msg.sender, address(this), _amount);
uint256 afterAmt = brews.balanceOf(address(this));
totalEarned = totalEarned + afterAmt - beforeAmt;
}
function increaseEmissionRate(uint256 _amount) external onlyOwner {
require(startBlock > 0, "pool is not started");
require(_amount > 0, "invalid amount");
uint256 bonusEndBlock = 0;
for (uint256 i = 0; i < poolInfo.length; i++) {
if (bonusEndBlock < poolInfo[i].bonusEndBlock) {
bonusEndBlock = poolInfo[i].bonusEndBlock;
}
}
require(bonusEndBlock > block.number, "pool was already finished");
massUpdatePools();
uint256 beforeAmt = brews.balanceOf(address(this));
brews.safeTransferFrom(msg.sender, address(this), _amount);
uint256 afterAmt = brews.balanceOf(address(this));
totalEarned = totalEarned + afterAmt - beforeAmt;
_updateRewardRate();
}
function _updateRewardRate() internal {
uint256 bonusEndBlock = 0;
for (uint256 i = 0; i < poolInfo.length; i++) {
if (bonusEndBlock < poolInfo[i].bonusEndBlock) {
bonusEndBlock = poolInfo[i].bonusEndBlock;
}
}
if (bonusEndBlock <= block.number) return;
uint256 remainRewards = availableRewardTokens() + paidRewards;
if (remainRewards > shouldTotalPaid) {
remainRewards = remainRewards - shouldTotalPaid;
uint256 remainBlocks = bonusEndBlock - block.number;
rewardPerBlock = remainRewards / remainBlocks;
emit UpdateEmissionRate(msg.sender, rewardPerBlock);
}
}
function emergencyWithdrawRewards(uint256 _amount) external onlyOwner {
if (_amount == 0) {
uint256 amount = brews.balanceOf(address(this));
safeTokenTransfer(msg.sender, amount);
} else {
safeTokenTransfer(msg.sender, _amount);
}
}
function emergencyWithdrawReflections() external onlyOwner {
if (address(reflectionToken) == address(0x0)) {
uint256 amount = address(this).balance;
payable(address(msg.sender)).transfer(amount);
} else {
uint256 amount = IERC20(reflectionToken).balanceOf(address(this));
IERC20(reflectionToken).transfer(msg.sender, amount);
}
}
function transferToHarvest() external onlyOwner {
if (hasDividend || address(brews) == reflectionToken) return;
if (reflectionToken == address(0x0)) {
payable(treasury).transfer(address(this).balance);
} else {
uint256 _amount = IERC20(reflectionToken).balanceOf(address(this));
IERC20(reflectionToken).safeTransfer(treasury, _amount);
}
}
function recoverWrongToken(address _token) external onlyOwner {
require(
_token != address(brews) && _token != reflectionToken, "cannot recover reward token or reflection token"
);
require(poolExistence[IERC20(_token)] == false, "token is using on pool");
if (_token == address(0x0)) {
uint256 amount = address(this).balance;
payable(address(msg.sender)).transfer(amount);
} else {
uint256 amount = IERC20(_token).balanceOf(address(this));
if (amount > 0) {
IERC20(_token).transfer(msg.sender, amount);
}
}
}
function _safeSwap(address _uniRouter, uint256 _amountIn, address[] memory _path, address _to)
internal
returns (uint256)
{
uint256 beforeAmt = IERC20(_path[_path.length - 1]).balanceOf(address(this));
IERC20(_path[0]).safeApprove(_uniRouter, _amountIn);
IUniRouter02(_uniRouter).swapExactTokensForTokensSupportingFeeOnTransferTokens(
_amountIn, 0, _path, _to, block.timestamp + 600
);
uint256 afterAmt = IERC20(_path[_path.length - 1]).balanceOf(address(this));
return afterAmt - beforeAmt;
}
function _addLiquidity(
address _uniRouter,
address _token0,
address _token1,
uint256 _tokenAmt0,
uint256 _tokenAmt1,
address _to
) internal returns (uint256 amountA, uint256 amountB, uint256 liquidity) {
IERC20(_token0).safeIncreaseAllowance(_uniRouter, _tokenAmt0);
IERC20(_token1).safeIncreaseAllowance(_uniRouter, _tokenAmt1);
(amountA, amountB, liquidity) = IUniRouter02(_uniRouter).addLiquidity(
_token0, _token1, _tokenAmt0, _tokenAmt1, 0, 0, _to, block.timestamp + 600
);
IERC20(_token0).safeApprove(_uniRouter, uint256(0));
IERC20(_token1).safeApprove(_uniRouter, uint256(0));
}
receive() external payable {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IUniRouter01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB, uint256 liquidity);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external payable returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(uint256 amountOutMin, address[] calldata path, address to, uint256 deadline)
external
payable
returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(uint256 amountOut, address[] calldata path, address to, uint256 deadline)
external
payable
returns (uint256[] memory amounts);
function quote(uint256 amountA, uint256 reserveA, uint256 reserveB) external pure returns (uint256 amountB);
function getAmountOut(uint256 amountIn, uint256 reserveIn, uint256 reserveOut)
external
pure
returns (uint256 amountOut);
function getAmountIn(uint256 amountOut, uint256 reserveIn, uint256 reserveOut)
external
pure
returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IUniRouter01.sol";
interface IUniRouter02 is IUniRouter01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;
interface IWETH {
function deposit() external payable;
function transfer(address to, uint256 value) external returns (bool);
function withdraw(uint256) external;
}