Contract Name:
BrewlabsStaking
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 v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (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 {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.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";
interface WhiteList {
function whitelisted(address _address) external view returns (bool);
}
contract BrewlabsStaking is Ownable, ReentrancyGuard {
using SafeERC20 for IERC20;
uint256 private constant PERCENT_PRECISION = 10000;
uint256 private constant BLOCKS_PER_DAY = 6426;
// Whether it is initialized
bool public isInitialized;
uint256 public duration = 365; // 365 days
// Whether a limit is set for users
bool public hasUserLimit;
// The pool limit (0 if none)
uint256 public poolLimitPerUser;
address public whiteList;
// The block number when staking starts.
uint256 public startBlock;
// The block number when staking ends.
uint256 public bonusEndBlock;
// tokens created per block.
uint256 public rewardPerBlock;
// The block number of the last pool update
uint256 public lastRewardBlock;
// swap router and path, slipPage
uint256 public slippageFactor = 8000; // 20% default slippage tolerance
uint256 public constant slippageFactorUL = 9950;
address public uniRouterAddress;
address[] public reflectionToStakedPath;
address[] public earnedToStakedPath;
// The deposit & withdraw fee
uint256 public constant MAX_FEE = 2000;
uint256 public depositFee;
uint256 public withdrawFee;
address public walletA;
address public treasury = 0x64961Ffd0d84b2355eC2B5d35B0d8D8825A774dc;
uint256 public performanceFee = 0.00089 ether;
// The precision factor
uint256 public PRECISION_FACTOR;
uint256 public PRECISION_FACTOR_REFLECTION;
// The staked token
IERC20 public stakingToken;
// The earned token
IERC20 public earnedToken;
// The dividend token of staking token
address public dividendToken;
bool public hasDividend;
bool public autoAdjustableForRewardRate = false;
// Accrued token per share
uint256 public accTokenPerShare;
uint256 public accDividendPerShare;
uint256 public totalStaked;
uint256 private totalEarned;
uint256 private totalReflections;
uint256 private reflections;
uint256 private paidRewards;
uint256 private shouldTotalPaid;
// Info of each user that stakes tokens (stakingToken)
mapping(address => UserInfo) public userInfo;
struct UserInfo {
uint256 amount; // How many staked tokens the user has provided
uint256 rewardDebt; // Reward debt
uint256 reflectionDebt; // Reflection debt
}
event Deposit(address indexed user, uint256 amount);
event Withdraw(address indexed user, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 amount);
event AdminTokenRecovered(address tokenRecovered, uint256 amount);
event NewStartAndEndBlocks(uint256 startBlock, uint256 endBlock);
event NewRewardPerBlock(uint256 rewardPerBlock);
event RewardsStop(uint256 blockNumber);
event EndBlockUpdated(uint256 blockNumber);
event UpdatePoolLimit(uint256 poolLimitPerUser, bool hasLimit);
event ServiceInfoUpadted(address _addr, uint256 _fee);
event WalletAUpdated(address _addr);
event DurationUpdated(uint256 _duration);
event SetAutoAdjustableForRewardRate(bool status);
event SetWhiteList(address _whitelist);
event SetSettings(
uint256 _depositFee,
uint256 _withdrawFee,
uint256 _slippageFactor,
address _uniRouter,
address[] _path0,
address[] _path1
);
constructor() {}
/**
* @notice Initialize the contract
* @param _stakingToken: staked token address
* @param _earnedToken: earned token address
* @param _dividendToken: reflection token address
* @param _rewardPerBlock: reward per block (in earnedToken)
* @param _depositFee: deposit fee
* @param _withdrawFee: withdraw fee
* @param _uniRouter: uniswap router address for swap tokens
* @param _earnedToStakedPath: swap path to compound (earned -> staking path)
* @param _reflectionToStakedPath: swap path to compound (reflection -> staking path)
* @param _whiteList: whitelist contract address
* @param _hasDividend: reflection available flag
*/
function initialize(
IERC20 _stakingToken,
IERC20 _earnedToken,
address _dividendToken,
uint256 _rewardPerBlock,
uint256 _depositFee,
uint256 _withdrawFee,
address _uniRouter,
address[] memory _earnedToStakedPath,
address[] memory _reflectionToStakedPath,
address _whiteList,
bool _hasDividend
) external onlyOwner {
require(!isInitialized, "Already initialized");
// Make this contract initialized
isInitialized = true;
stakingToken = _stakingToken;
earnedToken = _earnedToken;
dividendToken = _dividendToken;
hasDividend = _hasDividend;
rewardPerBlock = _rewardPerBlock;
require(_depositFee < MAX_FEE, "Invalid deposit fee");
require(_withdrawFee < MAX_FEE, "Invalid withdraw fee");
depositFee = _depositFee;
withdrawFee = _withdrawFee;
walletA = msg.sender;
uint256 decimalsRewardToken = uint256(IERC20Metadata(address(earnedToken)).decimals());
require(decimalsRewardToken < 30, "Must be inferior to 30");
PRECISION_FACTOR = uint256(10 ** (40 - decimalsRewardToken));
uint256 decimalsdividendToken = 18;
if (address(dividendToken) != address(0x0)) {
decimalsdividendToken = uint256(IERC20Metadata(address(dividendToken)).decimals());
require(decimalsdividendToken < 30, "Must be inferior to 30");
}
PRECISION_FACTOR_REFLECTION = uint256(10 ** (40 - decimalsdividendToken));
uniRouterAddress = _uniRouter;
earnedToStakedPath = _earnedToStakedPath;
reflectionToStakedPath = _reflectionToStakedPath;
whiteList = _whiteList;
}
/**
* @notice Deposit staked tokens and collect reward tokens (if any)
* @param _amount: amount to withdraw (in earnedToken)
*/
function deposit(uint256 _amount) external payable nonReentrant {
require(startBlock > 0 && startBlock < block.number, "Staking hasn't started yet");
require(_amount > 0, "Amount should be greator than 0");
if (whiteList != address(0x0)) {
require(WhiteList(whiteList).whitelisted(msg.sender), "not whitelisted");
}
UserInfo storage user = userInfo[msg.sender];
if (hasUserLimit) {
require(_amount + user.amount <= poolLimitPerUser, "User amount above limit");
}
_transferPerformanceFee();
_updatePool();
if (user.amount > 0) {
uint256 pending = user.amount * accTokenPerShare / PRECISION_FACTOR - user.rewardDebt;
if (pending > 0) {
require(availableRewardTokens() >= pending, "Insufficient reward tokens");
earnedToken.safeTransfer(address(msg.sender), pending);
if (totalEarned > pending) {
totalEarned = totalEarned - pending;
} else {
totalEarned = 0;
}
paidRewards = paidRewards + pending;
}
uint256 pendingReflection =
user.amount * accDividendPerShare / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;
if (pendingReflection > 0 && hasDividend) {
if (address(dividendToken) == address(0x0)) {
payable(msg.sender).transfer(estimateDividendAmount(pendingReflection));
} else {
IERC20(dividendToken).safeTransfer(address(msg.sender), estimateDividendAmount(pendingReflection));
}
totalReflections = totalReflections - pendingReflection;
}
}
uint256 beforeAmount = stakingToken.balanceOf(address(this));
stakingToken.safeTransferFrom(address(msg.sender), address(this), _amount);
uint256 afterAmount = stakingToken.balanceOf(address(this));
uint256 realAmount = afterAmount - beforeAmount;
if (realAmount > _amount) realAmount = _amount;
if (depositFee > 0) {
uint256 fee = realAmount * depositFee / PERCENT_PRECISION;
stakingToken.safeTransfer(walletA, fee);
realAmount = realAmount - fee;
}
user.amount = user.amount + realAmount;
user.rewardDebt = user.amount * accTokenPerShare / PRECISION_FACTOR;
user.reflectionDebt = user.amount * accDividendPerShare / PRECISION_FACTOR_REFLECTION;
totalStaked = totalStaked + realAmount;
emit Deposit(msg.sender, realAmount);
if (autoAdjustableForRewardRate) _updateRewardRate();
}
/**
* @notice Withdraw staked tokens and collect reward tokens
* @param _amount: amount to withdraw (in earnedToken)
*/
function withdraw(uint256 _amount) external payable nonReentrant {
require(_amount > 0, "Amount should be greator than 0");
UserInfo storage user = userInfo[msg.sender];
require(user.amount >= _amount, "Amount to withdraw too high");
_transferPerformanceFee();
_updatePool();
if (user.amount > 0) {
uint256 pending = user.amount * accTokenPerShare / PRECISION_FACTOR - user.rewardDebt;
if (pending > 0) {
require(availableRewardTokens() >= pending, "Insufficient reward tokens");
earnedToken.safeTransfer(address(msg.sender), pending);
if (totalEarned > pending) {
totalEarned = totalEarned - pending;
} else {
totalEarned = 0;
}
paidRewards = paidRewards + pending;
}
uint256 pendingReflection =
user.amount * accDividendPerShare / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;
if (pendingReflection > 0 && hasDividend) {
if (address(dividendToken) == address(0x0)) {
payable(msg.sender).transfer(estimateDividendAmount(pendingReflection));
} else {
IERC20(dividendToken).safeTransfer(address(msg.sender), estimateDividendAmount(pendingReflection));
}
totalReflections = totalReflections - pendingReflection;
}
}
uint256 realAmount = _amount;
if (user.amount < _amount) {
realAmount = user.amount;
}
user.amount = user.amount - realAmount;
totalStaked = totalStaked - realAmount;
emit Withdraw(msg.sender, realAmount);
if (withdrawFee > 0) {
uint256 fee = realAmount * withdrawFee / PERCENT_PRECISION;
stakingToken.safeTransfer(walletA, fee);
realAmount = realAmount - fee;
}
stakingToken.safeTransfer(address(msg.sender), realAmount);
user.rewardDebt = user.amount * accTokenPerShare / PRECISION_FACTOR;
user.reflectionDebt = user.amount * accDividendPerShare / PRECISION_FACTOR_REFLECTION;
if (autoAdjustableForRewardRate) _updateRewardRate();
}
function claimReward() external payable nonReentrant {
UserInfo storage user = userInfo[msg.sender];
_transferPerformanceFee();
_updatePool();
if (user.amount == 0) return;
uint256 pending = user.amount * accTokenPerShare / PRECISION_FACTOR - user.rewardDebt;
if (pending > 0) {
require(availableRewardTokens() >= pending, "Insufficient reward tokens");
earnedToken.safeTransfer(address(msg.sender), pending);
if (totalEarned > pending) {
totalEarned = totalEarned - pending;
} else {
totalEarned = 0;
}
paidRewards = paidRewards + pending;
}
user.rewardDebt = user.amount * accTokenPerShare / PRECISION_FACTOR;
}
function claimDividend() external payable nonReentrant {
require(hasDividend == true, "No reflections");
UserInfo storage user = userInfo[msg.sender];
_transferPerformanceFee();
_updatePool();
if (user.amount == 0) return;
uint256 pendingReflection =
user.amount * accDividendPerShare / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;
if (pendingReflection > 0) {
if (address(dividendToken) == address(0x0)) {
payable(msg.sender).transfer(estimateDividendAmount(pendingReflection));
} else {
IERC20(dividendToken).safeTransfer(address(msg.sender), estimateDividendAmount(pendingReflection));
}
totalReflections = totalReflections - pendingReflection;
}
user.reflectionDebt = user.amount * accDividendPerShare / PRECISION_FACTOR_REFLECTION;
}
function compoundReward() external payable nonReentrant {
UserInfo storage user = userInfo[msg.sender];
_transferPerformanceFee();
_updatePool();
if (user.amount == 0) return;
uint256 pending = user.amount * accTokenPerShare / PRECISION_FACTOR - user.rewardDebt;
if (pending > 0) {
require(availableRewardTokens() >= pending, "Insufficient reward tokens");
if (totalEarned > pending) {
totalEarned = totalEarned - pending;
} else {
totalEarned = 0;
}
paidRewards = paidRewards + pending;
if (address(stakingToken) != address(earnedToken)) {
uint256 beforeAmount = stakingToken.balanceOf(address(this));
_safeSwap(pending, earnedToStakedPath, address(this));
uint256 afterAmount = stakingToken.balanceOf(address(this));
pending = afterAmount - beforeAmount;
}
if (hasUserLimit) {
require(pending + user.amount <= poolLimitPerUser, "User amount above limit");
}
totalStaked = totalStaked + pending;
user.amount = user.amount + pending;
user.reflectionDebt = user.reflectionDebt + pending * accDividendPerShare / PRECISION_FACTOR_REFLECTION;
emit Deposit(msg.sender, pending);
}
user.rewardDebt = user.amount * accTokenPerShare / PRECISION_FACTOR;
}
function compoundDividend() external payable nonReentrant {
require(hasDividend == true, "No reflections");
UserInfo storage user = userInfo[msg.sender];
_transferPerformanceFee();
_updatePool();
if (user.amount == 0) return;
uint256 _pending = (user.amount * accDividendPerShare) / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;
uint256 pending = estimateDividendAmount(_pending);
totalReflections = totalReflections - _pending;
if (pending > 0) {
if (address(stakingToken) != address(dividendToken)) {
if (address(dividendToken) == address(0x0)) {
address wethAddress = IUniRouter02(uniRouterAddress).WETH();
IWETH(wethAddress).deposit{value: pending}();
}
uint256 beforeAmount = stakingToken.balanceOf(address(this));
_safeSwap(pending, reflectionToStakedPath, address(this));
uint256 afterAmount = stakingToken.balanceOf(address(this));
pending = afterAmount - beforeAmount;
}
if (hasUserLimit) {
require(pending + user.amount <= poolLimitPerUser, "User amount above limit");
}
totalStaked = totalStaked + pending;
user.amount = user.amount + pending;
user.rewardDebt = user.rewardDebt + pending * accTokenPerShare / PRECISION_FACTOR;
emit Deposit(msg.sender, pending);
}
user.reflectionDebt = user.amount * accDividendPerShare / PRECISION_FACTOR_REFLECTION;
}
function _transferPerformanceFee() internal {
require(msg.value >= performanceFee, "should pay small gas to compound or harvest");
payable(treasury).transfer(performanceFee);
if (msg.value > performanceFee) {
payable(msg.sender).transfer(msg.value - performanceFee);
}
}
/**
* @notice Withdraw staked tokens without caring about rewards
* @dev Needs to be for emergency.
*/
function emergencyWithdraw() external nonReentrant {
UserInfo storage user = userInfo[msg.sender];
uint256 amountToTransfer = user.amount;
user.amount = 0;
user.rewardDebt = 0;
user.reflectionDebt = 0;
if (amountToTransfer > 0) {
stakingToken.safeTransfer(address(msg.sender), amountToTransfer);
totalStaked = totalStaked - amountToTransfer;
}
emit EmergencyWithdraw(msg.sender, amountToTransfer);
}
/**
* @notice Available amount of reward token
*/
function availableRewardTokens() public view returns (uint256) {
if (address(earnedToken) == address(dividendToken)) return totalEarned;
uint256 _amount = earnedToken.balanceOf(address(this));
if (address(earnedToken) == address(stakingToken)) {
if (_amount < totalStaked) return 0;
return _amount - totalStaked;
}
return _amount;
}
/**
* @notice Available amount of reflection token
*/
function availableDividendTokens() public view returns (uint256) {
if (address(dividendToken) == address(0x0)) {
return address(this).balance;
}
uint256 _amount = IERC20(dividendToken).balanceOf(address(this));
if (address(dividendToken) == address(earnedToken)) {
if (_amount < totalEarned) return 0;
_amount = _amount - totalEarned;
}
if (address(dividendToken) == address(stakingToken)) {
if (_amount < totalStaked) return 0;
_amount = _amount - totalStaked;
}
return _amount;
}
function insufficientRewards() external view returns (uint256) {
uint256 adjustedShouldTotalPaid = shouldTotalPaid;
uint256 remainRewards = availableRewardTokens() + paidRewards;
if (startBlock == 0) {
adjustedShouldTotalPaid = adjustedShouldTotalPaid + rewardPerBlock * duration * BLOCKS_PER_DAY;
} else {
uint256 remainBlocks = _getMultiplier(lastRewardBlock, bonusEndBlock);
adjustedShouldTotalPaid = adjustedShouldTotalPaid + rewardPerBlock * remainBlocks;
}
if (remainRewards >= adjustedShouldTotalPaid) return 0;
return adjustedShouldTotalPaid - remainRewards;
}
/**
* @notice View function to see pending reward on frontend.
* @param _user: user address
* @return Pending reward for a given user
*/
function pendingReward(address _user) external view returns (uint256) {
UserInfo memory user = userInfo[_user];
uint256 adjustedTokenPerShare = accTokenPerShare;
if (block.number > lastRewardBlock && totalStaked != 0 && lastRewardBlock > 0) {
uint256 multiplier = _getMultiplier(lastRewardBlock, block.number);
uint256 rewards = multiplier * rewardPerBlock;
adjustedTokenPerShare = accTokenPerShare + (rewards * PRECISION_FACTOR / totalStaked);
}
return user.amount * adjustedTokenPerShare / PRECISION_FACTOR - user.rewardDebt;
}
function pendingDividends(address _user) external view returns (uint256) {
if (totalStaked == 0) return 0;
UserInfo memory user = userInfo[_user];
uint256 reflectionAmount = availableDividendTokens();
if (reflectionAmount > totalReflections) {
reflectionAmount -= totalReflections;
} else {
reflectionAmount = 0;
}
uint256 sTokenBal = totalStaked;
uint256 eTokenBal = availableRewardTokens();
if (address(stakingToken) == address(earnedToken)) {
sTokenBal = sTokenBal + eTokenBal;
}
uint256 adjustedReflectionPerShare =
accDividendPerShare + (reflectionAmount * PRECISION_FACTOR_REFLECTION / sTokenBal);
uint256 pendingReflection =
user.amount * adjustedReflectionPerShare / PRECISION_FACTOR_REFLECTION - user.reflectionDebt;
return pendingReflection;
}
/**
* Admin Methods
*/
function harvestTo(address _treasury) external onlyOwner {
_updatePool();
if (reflections > 0) {
if (address(dividendToken) == address(0x0)) {
payable(_treasury).transfer(estimateDividendAmount(reflections));
} else {
IERC20(dividendToken).safeTransfer(_treasury, estimateDividendAmount(reflections));
}
totalReflections = totalReflections - reflections;
reflections = 0;
}
}
/**
* @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 onlyOwner nonReentrant {
require(_amount > 0, "invalid amount");
uint256 beforeAmt = earnedToken.balanceOf(address(this));
earnedToken.safeTransferFrom(msg.sender, address(this), _amount);
uint256 afterAmt = earnedToken.balanceOf(address(this));
totalEarned = totalEarned + afterAmt - beforeAmt;
}
function increaseEmissionRate(uint256 _amount) external onlyOwner {
require(startBlock > 0, "pool is not started");
require(bonusEndBlock > block.number, "pool was already finished");
require(_amount > 0, "invalid amount");
_updatePool();
uint256 beforeAmt = earnedToken.balanceOf(address(this));
earnedToken.safeTransferFrom(msg.sender, address(this), _amount);
uint256 afterAmt = earnedToken.balanceOf(address(this));
totalEarned = totalEarned + afterAmt - beforeAmt;
_updateRewardRate();
}
function _updateRewardRate() internal {
if (bonusEndBlock <= block.number) return;
uint256 remainRewards = availableRewardTokens() + paidRewards;
if (remainRewards > shouldTotalPaid) {
remainRewards = remainRewards - shouldTotalPaid;
uint256 remainBlocks = bonusEndBlock - block.number;
rewardPerBlock = remainRewards / remainBlocks;
emit NewRewardPerBlock(rewardPerBlock);
}
}
/**
* @notice Withdraw reward token
* @dev Only callable by owner. Needs to be for emergency.
*/
function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {
require(block.number > bonusEndBlock, "Pool is running");
require(availableRewardTokens() >= _amount, "Insufficient reward tokens");
if (_amount == 0) _amount = availableRewardTokens();
earnedToken.safeTransfer(address(msg.sender), _amount);
if (totalEarned > 0) {
if (_amount > totalEarned) {
totalEarned = 0;
} else {
totalEarned = totalEarned - _amount;
}
}
}
/**
* @notice It allows the admin to recover wrong tokens sent to the contract
* @param _tokenAddress: the address of the token to withdraw
* @param _tokenAmount: the number of tokens to withdraw
* @dev This function is only callable by admin.
*/
function recoverWrongTokens(address _tokenAddress, uint256 _tokenAmount) external onlyOwner {
require(_tokenAddress != address(earnedToken) || _tokenAddress == dividendToken, "Cannot be reward token");
if (_tokenAddress == address(stakingToken)) {
uint256 tokenBal = stakingToken.balanceOf(address(this));
require(_tokenAmount <= tokenBal - totalStaked, "Insufficient balance");
}
if (_tokenAddress == address(0x0)) {
payable(msg.sender).transfer(_tokenAmount);
} else {
IERC20(_tokenAddress).safeTransfer(address(msg.sender), _tokenAmount);
}
emit AdminTokenRecovered(_tokenAddress, _tokenAmount);
}
function startReward() external onlyOwner {
require(startBlock == 0, "Pool was already started");
startBlock = block.number + 100;
bonusEndBlock = startBlock + duration * BLOCKS_PER_DAY;
lastRewardBlock = startBlock;
emit NewStartAndEndBlocks(startBlock, bonusEndBlock);
}
function stopReward() external onlyOwner {
_updatePool();
uint256 remainRewards = availableRewardTokens() + paidRewards;
if (remainRewards > shouldTotalPaid) {
remainRewards = remainRewards - shouldTotalPaid;
earnedToken.transfer(msg.sender, remainRewards);
if (totalEarned > remainRewards) {
totalEarned = totalEarned - remainRewards;
} else {
totalEarned = 0;
}
}
bonusEndBlock = block.number;
emit RewardsStop(bonusEndBlock);
}
function updateEndBlock(uint256 _endBlock) external onlyOwner {
require(startBlock > 0, "Pool is not started");
require(bonusEndBlock > block.number, "Pool was already finished");
require(_endBlock > block.number && _endBlock > startBlock, "Invalid end block");
bonusEndBlock = _endBlock;
emit EndBlockUpdated(_endBlock);
}
/**
* @notice Update pool limit per user
* @dev Only callable by owner.
* @param _hasUserLimit: whether the limit remains forced
* @param _poolLimitPerUser: new pool limit per user
*/
function updatePoolLimitPerUser(bool _hasUserLimit, uint256 _poolLimitPerUser) external onlyOwner {
if (_hasUserLimit) {
require(_poolLimitPerUser > poolLimitPerUser, "New limit must be higher");
poolLimitPerUser = _poolLimitPerUser;
} else {
poolLimitPerUser = 0;
}
hasUserLimit = _hasUserLimit;
emit UpdatePoolLimit(poolLimitPerUser, hasUserLimit);
}
/**
* @notice Update reward per block
* @dev Only callable by owner.
* @param _rewardPerBlock: the reward per block
*/
function updateRewardPerBlock(uint256 _rewardPerBlock) external onlyOwner {
// require(block.number < startBlock, "Pool was already started");
rewardPerBlock = _rewardPerBlock;
emit NewRewardPerBlock(_rewardPerBlock);
}
function setServiceInfo(address _treasury, uint256 _fee) external {
require(msg.sender == treasury, "setServiceInfo: FORBIDDEN");
require(_treasury != address(0x0), "Invalid address");
treasury = _treasury;
performanceFee = _fee;
emit ServiceInfoUpadted(_treasury, _fee);
}
function updateWalletA(address _walletA) external onlyOwner {
require(_walletA != address(0x0) || _walletA != walletA, "Invalid address");
walletA = _walletA;
emit WalletAUpdated(_walletA);
}
function setDuration(uint256 _duration) external onlyOwner {
require(_duration >= 30, "lower limit reached");
duration = _duration;
if (startBlock > 0) {
bonusEndBlock = startBlock + duration * BLOCKS_PER_DAY;
require(bonusEndBlock > block.number, "invalid duration");
}
emit DurationUpdated(_duration);
}
function setAutoAdjustableForRewardRate(bool _status) external onlyOwner {
autoAdjustableForRewardRate = _status;
emit SetAutoAdjustableForRewardRate(_status);
}
function setSettings(
uint256 _depositFee,
uint256 _withdrawFee,
uint256 _slippageFactor,
address _uniRouter,
address[] memory _earnedToStakedPath,
address[] memory _reflectionToStakedPath
) external onlyOwner {
require(_depositFee < MAX_FEE, "Invalid deposit fee");
require(_withdrawFee < MAX_FEE, "Invalid withdraw fee");
require(_slippageFactor <= slippageFactorUL, "_slippageFactor too high");
depositFee = _depositFee;
withdrawFee = _withdrawFee;
slippageFactor = _slippageFactor;
uniRouterAddress = _uniRouter;
reflectionToStakedPath = _reflectionToStakedPath;
earnedToStakedPath = _earnedToStakedPath;
emit SetSettings(
_depositFee, _withdrawFee, _slippageFactor, _uniRouter, _earnedToStakedPath, _reflectionToStakedPath
);
}
function setWhitelist(address _whitelist) external onlyOwner {
whiteList = _whitelist;
emit SetWhiteList(_whitelist);
}
/**
* @notice Update reward variables of the given pool to be up-to-date.
*/
function _updatePool() internal {
// calc reflection rate
if (totalStaked > 0 && hasDividend) {
uint256 reflectionAmount = availableDividendTokens();
if (reflectionAmount > totalReflections) {
reflectionAmount -= totalReflections;
} else {
reflectionAmount = 0;
}
uint256 sTokenBal = totalStaked;
uint256 eTokenBal = availableRewardTokens();
if (address(stakingToken) == address(earnedToken)) {
sTokenBal = sTokenBal + eTokenBal;
}
accDividendPerShare += reflectionAmount * PRECISION_FACTOR_REFLECTION / sTokenBal;
reflections += reflectionAmount * eTokenBal / sTokenBal;
totalReflections += reflectionAmount;
}
if (block.number <= lastRewardBlock || lastRewardBlock == 0) return;
if (totalStaked == 0) {
lastRewardBlock = block.number;
return;
}
uint256 multiplier = _getMultiplier(lastRewardBlock, block.number);
uint256 _reward = multiplier * rewardPerBlock;
accTokenPerShare += _reward * PRECISION_FACTOR / totalStaked;
lastRewardBlock = block.number;
shouldTotalPaid = shouldTotalPaid + _reward;
}
function estimateDividendAmount(uint256 amount) internal view returns (uint256) {
uint256 dTokenBal = availableDividendTokens();
if (amount > totalReflections) amount = totalReflections;
if (amount > dTokenBal) amount = dTokenBal;
return amount;
}
/**
* @notice Return reward multiplier over the given _from to _to block.
* @param _from: block to start
* @param _to: block to finish
*/
function _getMultiplier(uint256 _from, uint256 _to) internal view returns (uint256) {
if (_to <= bonusEndBlock) {
return _to - _from;
} else if (_from >= bonusEndBlock) {
return 0;
} else {
return bonusEndBlock - _from;
}
}
function _safeSwap(uint256 _amountIn, address[] memory _path, address _to) internal {
uint256[] memory amounts = IUniRouter02(uniRouterAddress).getAmountsOut(_amountIn, _path);
uint256 amountOut = amounts[amounts.length - 1];
IERC20(_path[0]).safeApprove(uniRouterAddress, _amountIn);
IUniRouter02(uniRouterAddress).swapExactTokensForTokensSupportingFeeOnTransferTokens(
_amountIn, amountOut * slippageFactor / PERCENT_PRECISION, _path, _to, block.timestamp + 600
);
}
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;
}