Contract Source Code:
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol";
import "../libraries/Errors.sol";
import "../interfaces/IBentCVX.sol";
import "../interfaces/IBentPool.sol";
import "../interfaces/IBentPoolManager.sol";
import "../interfaces/convex/IConvexBooster.sol";
import "../interfaces/convex/IBaseRewardPool.sol";
import "../interfaces/convex/IConvexToken.sol";
import "../interfaces/convex/IVirtualBalanceRewardPool.sol";
contract BentLocker is OwnableUpgradeable, ReentrancyGuardUpgradeable {
using SafeERC20Upgradeable for IERC20Upgradeable;
// events
event Deposit(address indexed user, uint256 amount, uint256 shares);
event Withdraw(address indexed user, uint256 amount, uint256 shares);
event ClaimAll(address indexed user);
event Claim(address indexed user, uint256[] pids);
// structs
struct PoolData {
address rewardToken;
uint256 accRewardPerShare; // Accumulated Rewards per share, times 1e36. See below.
uint256 rewardRate;
uint256 reserves;
}
struct LockedBalance {
uint256 amount;
uint256 unlockAt;
}
struct Epoch {
uint256 supply;
uint256 startAt;
}
struct StreamInfo {
uint256 windowLength;
uint256 endRewardBlock; // end block of rewards stream
}
IERC20Upgradeable public bent;
IBentCVX public bentCVX;
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
// reward settings
uint256 public rewardPoolsCount;
mapping(uint256 => PoolData) public rewardPools;
mapping(address => bool) public isRewardToken;
mapping(uint256 => mapping(address => uint256)) internal userRewardDebt;
mapping(uint256 => mapping(address => uint256)) internal userPendingRewards;
// lock settings
uint256 internal firstEpoch; // first epoch start in week
uint256 public epochLength; // 1 weeks
uint256 public lockDurationInEpoch; // in lock group = 8 weeks
mapping(address => mapping(uint256 => uint256)) public userLocks; // user => epoch => locked balance
uint256 lastRewardBlock; // last block of rewards streamed
StreamInfo public bentStreamInfo; // only for bentCVX rewards
StreamInfo public votiumStreamInfo; // for non-bentCVX rewards
function initialize(
address _bent,
address _bentCVX,
address[] memory _rewardTokens,
uint256 bentWindowLength, // 7 days
uint256 votiumWindowLength, // 15 days
uint256 _epochLength, // 1 weeks
uint256 _lockDurationInEpoch // in lock group = 8 weeks
) public initializer {
__Ownable_init();
__ReentrancyGuard_init();
bent = IERC20Upgradeable(_bent);
bentCVX = IBentCVX(_bentCVX);
addRewardTokens(_rewardTokens);
bentStreamInfo.windowLength = bentWindowLength;
votiumStreamInfo.windowLength = votiumWindowLength;
epochLength = _epochLength;
lockDurationInEpoch = _lockDurationInEpoch;
firstEpoch = block.timestamp / epochLength;
}
function name() external pure returns (string memory) {
return "weBENT";
}
function decimals() external pure returns (uint256) {
return 18;
}
function addRewardTokens(address[] memory _rewardTokens) public onlyOwner {
uint256 length = _rewardTokens.length;
for (uint256 i = 0; i < length; i++) {
require(!isRewardToken[_rewardTokens[i]], Errors.ALREADY_EXISTS);
rewardPools[rewardPoolsCount + i].rewardToken = _rewardTokens[i];
isRewardToken[_rewardTokens[i]] = true;
}
rewardPoolsCount += length;
}
function removeRewardToken(uint256 _index) external onlyOwner {
require(_index < rewardPoolsCount, Errors.INVALID_INDEX);
isRewardToken[rewardPools[_index].rewardToken] = false;
delete rewardPools[_index];
}
function currentEpoch() public view returns (uint256) {
return block.timestamp / epochLength - firstEpoch;
}
function epochExpireAt(uint256 epoch) public view returns (uint256) {
return (firstEpoch + epoch + 1) * epochLength;
}
function unlockableBalances(address user) public view returns (uint256) {
uint256 lastEpoch = currentEpoch();
uint256 fromLockedEpoch = lastEpoch >= lockDurationInEpoch
? lastEpoch - lockDurationInEpoch + 1
: 0;
uint256 locked;
for (uint256 i = fromLockedEpoch; i <= lastEpoch; i++) {
locked += userLocks[user][i];
}
return balanceOf[user] - locked;
}
function lockedBalances(address user)
external
view
returns (
uint256 unlockable,
uint256 locked,
LockedBalance[] memory lockData
)
{
uint256 lastEpoch = currentEpoch();
uint256 fromLockedEpoch = lastEpoch >= lockDurationInEpoch
? lastEpoch - lockDurationInEpoch + 1
: 0;
lockData = new LockedBalance[](lastEpoch - fromLockedEpoch + 1);
for (uint256 i = fromLockedEpoch; i <= lastEpoch; i++) {
uint256 amount = userLocks[user][i];
lockData[i - fromLockedEpoch] = LockedBalance(
amount,
epochExpireAt(i)
);
locked += amount;
}
return (balanceOf[user] - locked, locked, lockData);
}
function pendingReward(address user)
external
view
returns (uint256[] memory pending)
{
uint256 _rewardPoolsCount = rewardPoolsCount;
pending = new uint256[](_rewardPoolsCount);
if (totalSupply != 0) {
uint256[] memory addedRewards = _calcAddedRewards();
for (uint256 i = 0; i < _rewardPoolsCount; ++i) {
PoolData memory pool = rewardPools[i];
if (pool.rewardToken == address(0)) {
continue;
}
uint256 newAccRewardPerShare = pool.accRewardPerShare +
((addedRewards[i] * 1e36) / totalSupply);
pending[i] =
userPendingRewards[i][user] +
((balanceOf[user] * newAccRewardPerShare) / 1e36) -
userRewardDebt[i][user];
}
}
}
function deposit(uint256 _amount) external nonReentrant {
require(_amount != 0, Errors.ZERO_AMOUNT);
_updateAccPerShare(true);
uint256 shares = _amount;
if (totalSupply != 0) {
shares = (shares * totalSupply) / bent.balanceOf(address(this));
}
bent.safeTransferFrom(msg.sender, address(this), _amount);
_mint(msg.sender, shares);
_updateUserRewardDebt();
emit Deposit(msg.sender, _amount, shares);
}
function withdraw(uint256 _shares) external nonReentrant {
require(
unlockableBalances(msg.sender) >= _shares && _shares != 0,
Errors.INVALID_AMOUNT
);
_updateAccPerShare(true);
uint256 amount = _shares;
if (totalSupply != 0) {
amount = (amount * bent.balanceOf(address(this))) / totalSupply;
}
_burn(msg.sender, _shares);
// transfer to msg.sender
bent.safeTransfer(msg.sender, amount);
_updateUserRewardDebt();
emit Withdraw(msg.sender, amount, _shares);
}
function claimAll() external virtual nonReentrant {
_updateAccPerShare(true);
bool claimed = false;
uint256 _rewardPoolsCount = rewardPoolsCount;
for (uint256 i = 0; i < _rewardPoolsCount; ++i) {
uint256 claimAmount = _claim(i);
if (claimAmount > 0) {
claimed = true;
}
}
require(claimed, Errors.NO_PENDING_REWARD);
_updateUserRewardDebt();
emit ClaimAll(msg.sender);
}
function claim(uint256[] memory pids) external nonReentrant {
_updateAccPerShare(true);
bool claimed = false;
for (uint256 i = 0; i < pids.length; ++i) {
uint256 claimAmount = _claim(pids[i]);
if (claimAmount > 0) {
claimed = true;
}
}
require(claimed, Errors.NO_PENDING_REWARD);
_updateUserRewardDebt();
emit Claim(msg.sender, pids);
}
function onReward() external nonReentrant {
_updateAccPerShare(false);
bool isBentAvaialble = false;
bool isVotiumAvailable = false;
// stream the rewards
for (uint256 i = 0; i < rewardPoolsCount; ++i) {
PoolData storage pool = rewardPools[i];
if (pool.rewardToken == address(0)) {
continue;
}
uint256 newRewards = IERC20Upgradeable(pool.rewardToken).balanceOf(
address(this)
) - pool.reserves;
if (newRewards == 0) {
continue;
}
StreamInfo memory streamInfo = bentStreamInfo;
isBentAvaialble = true;
if (pool.rewardToken != address(bentCVX)) {
streamInfo = votiumStreamInfo;
isVotiumAvailable = true;
}
if (streamInfo.endRewardBlock > lastRewardBlock) {
pool.rewardRate =
(pool.rewardRate *
(streamInfo.endRewardBlock - lastRewardBlock) +
newRewards *
1e36) /
streamInfo.windowLength;
} else {
pool.rewardRate = (newRewards * 1e36) / streamInfo.windowLength;
}
pool.reserves += newRewards;
}
if (isBentAvaialble) {
bentStreamInfo.endRewardBlock =
lastRewardBlock +
bentStreamInfo.windowLength;
}
if (isVotiumAvailable) {
votiumStreamInfo.endRewardBlock =
lastRewardBlock +
votiumStreamInfo.windowLength;
}
}
function bentBalanceOf(address user) external view returns (uint256) {
if (totalSupply == 0) {
return 0;
}
return (balanceOf[user] * bent.balanceOf(address(this))) / totalSupply;
}
// Internal Functions
function _updateAccPerShare(bool withdrawReward) internal {
uint256[] memory addedRewards = _calcAddedRewards();
uint256 _rewardPoolsCount = rewardPoolsCount;
for (uint256 i = 0; i < _rewardPoolsCount; ++i) {
PoolData storage pool = rewardPools[i];
if (pool.rewardToken == address(0)) {
continue;
}
if (totalSupply == 0) {
pool.accRewardPerShare = block.number;
} else {
pool.accRewardPerShare +=
(addedRewards[i] * (1e36)) /
totalSupply;
}
if (withdrawReward) {
uint256 pending = ((balanceOf[msg.sender] *
pool.accRewardPerShare) / 1e36) -
userRewardDebt[i][msg.sender];
if (pending > 0) {
userPendingRewards[i][msg.sender] += pending;
}
}
}
lastRewardBlock = block.number;
}
function _calcAddedRewards()
internal
view
returns (uint256[] memory addedRewards)
{
uint256 bentStreamDuration = _calcRewardDuration(
bentStreamInfo.windowLength,
bentStreamInfo.endRewardBlock
);
uint256 votiumStreamDuration = _calcRewardDuration(
votiumStreamInfo.windowLength,
votiumStreamInfo.endRewardBlock
);
uint256 _rewardPoolsCount = rewardPoolsCount;
addedRewards = new uint256[](_rewardPoolsCount);
for (uint256 i = 0; i < _rewardPoolsCount; ++i) {
if (rewardPools[i].rewardToken == address(bentCVX)) {
addedRewards[i] =
(rewardPools[i].rewardRate * bentStreamDuration) /
1e36;
} else {
addedRewards[i] =
(rewardPools[i].rewardRate * votiumStreamDuration) /
1e36;
}
}
}
function _calcRewardDuration(uint256 windowLength, uint256 endRewardBlock)
internal
view
returns (uint256)
{
uint256 startBlock = endRewardBlock > lastRewardBlock + windowLength
? endRewardBlock - windowLength
: lastRewardBlock;
uint256 endBlock = block.number > endRewardBlock
? endRewardBlock
: block.number;
return endBlock > startBlock ? endBlock - startBlock : 0;
}
function _updateUserRewardDebt() internal {
uint256 _rewardPoolsCount = rewardPoolsCount;
for (uint256 i = 0; i < _rewardPoolsCount; ++i) {
if (rewardPools[i].rewardToken != address(0)) {
userRewardDebt[i][msg.sender] =
(balanceOf[msg.sender] * rewardPools[i].accRewardPerShare) /
1e36;
}
}
}
function _claim(uint256 pid) internal returns (uint256 claimAmount) {
claimAmount = userPendingRewards[pid][msg.sender];
if (claimAmount > 0) {
IERC20Upgradeable(rewardPools[pid].rewardToken).safeTransfer(
msg.sender,
claimAmount
);
rewardPools[pid].reserves -= claimAmount;
userPendingRewards[pid][msg.sender] = 0;
}
}
function _mint(address _user, uint256 _amount) internal {
balanceOf[_user] += _amount;
totalSupply += _amount;
userLocks[_user][currentEpoch()] += _amount;
}
function _burn(address _user, uint256 _amount) internal {
balanceOf[_user] -= _amount;
totalSupply -= _amount;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal initializer {
__Context_init_unchained();
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal initializer {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20Upgradeable.sol";
import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
using AddressUpgradeable for address;
function safeTransfer(
IERC20Upgradeable token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20Upgradeable 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(
IERC20Upgradeable 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(
IERC20Upgradeable 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(
IERC20Upgradeable token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20Upgradeable 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
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @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 ReentrancyGuardUpgradeable is Initializable {
// 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;
function __ReentrancyGuard_init() internal initializer {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal initializer {
_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 make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
library Errors {
string public constant ZERO_ADDRESS = "100";
string public constant ZERO_AMOUNT = "101";
string public constant INVALID_ADDRESS = "102";
string public constant INVALID_AMOUNT = "103";
string public constant NO_PENDING_REWARD = "104";
string public constant INVALID_PID = "105";
string public constant INVALID_POOL_ADDRESS = "106";
string public constant UNAUTHORIZED = "107";
string public constant ALREADY_EXISTS = "108";
string public constant SAME_ALLOCPOINT = "109";
string public constant INVALID_REWARD_PER_BLOCK = "110";
string public constant INSUFFICIENT_REWARDS = "111";
string public constant EXCEED_MAX_HARVESTER_FEE = "112";
string public constant EXCEED_MAX_FEE = "113";
string public constant INVALID_INDEX = "114";
string public constant INVALID_REQUEST = "115";
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
interface IBentCVX {
function deposit(uint256 _amount) external;
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IBentPool {
function lpToken() external view returns (address);
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IBentPoolManager {
function feeInfo()
external
view
returns (
uint256,
address,
uint256,
address,
uint256
);
function rewardToken() external view returns (address);
function mint(address user, uint256 cvxAmount) external;
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
interface IConvexBooster {
function poolInfo(uint256)
external
view
returns (
address,
address,
address,
address,
address,
bool
);
function deposit(
uint256,
uint256,
bool
) external returns (bool);
function depositAll(uint256, bool) external returns (bool);
function withdraw(uint256, uint256) external returns (bool);
function withdrawAll(uint256) external returns (bool);
function rewardClaimed(
uint256,
address,
uint256
) external returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
interface IBaseRewardPool {
function getReward(address, bool) external returns (bool);
function getReward() external returns (bool);
function earned(address) external view returns (uint256);
function balanceOf(address) external view returns (uint256);
function extraRewards(uint256) external view returns (address);
function withdrawAndUnwrap(uint256, bool) external returns (bool);
function extraRewardsLength() external view returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IConvexToken is IERC20 {
function reductionPerCliff() external view returns (uint256);
function totalCliffs() external view returns (uint256);
function maxSupply() external view returns (uint256);
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;
interface IVirtualBalanceRewardPool {
function getReward(address) external;
function getReward() external;
function balanceOf(address) external view returns (uint256);
function earned(address) external view returns (uint256);
function rewardToken() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @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 ContextUpgradeable is Initializable {
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}