// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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() {
// 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;
}
}
/**
* @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);
}
/**
* @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);
}
/**
* @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 functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
/**
* @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");
}
}
}
interface IMultiplier {
/**
* Applies a multiplier on the _amount, based on the _pool and _beneficiary.
* The multiplier is not necessarily a constant number, it can be a more complex factor.
*/
function applyMultiplier(uint256 _amount, uint256 _duration) external view returns (uint256);
function getMultiplier(uint256 _amount, uint256 _duration) external view returns (uint256);
function getDurationGroup(uint256 _duration) external view returns (uint256);
function getDurationMultiplier(uint256 _duration) external view returns (uint256);
}
interface IPenaltyFee {
/**
* Calculates the penalty fee for the given _amount for a specific _beneficiary.
*/
function calculate(
uint256 _amount,
uint256 _duration,
address _pool
) external view returns (uint256);
}
interface IStakingPool {
struct StakingInfo {
uint256 stakedAmount; // amount of the stake
uint256 minimumStakeTimestamp; // timestamp of the minimum stake
uint256 duration; // in seconds
uint256 rewardPerTokenPaid; // Reward per token paid
uint256 rewards; // rewards to be claimed
}
function rewardsMultiplier() external view returns (IMultiplier);
function penaltyFeeCalculator() external view returns (IPenaltyFee);
event Staked(address indexed user, uint256 stakeNumber, uint256 amount);
event Unstaked(address indexed user, uint256 stakeNumber, uint256 amount);
event RewardPaid(address indexed user, uint256 stakeNumber, uint256 reward);
}
contract TrestleStakingPool is ReentrancyGuard, IStakingPool {
using SafeERC20 for IERC20;
address public constant BURN_ADDRESS = 0x000000000000000000000000000000000000dEaD;
IERC20 public immutable stakingToken;
IERC20 public immutable rewardsToken;
uint256 public immutable rewardsTokenDecimals;
IMultiplier public immutable override rewardsMultiplier;
IPenaltyFee public immutable override penaltyFeeCalculator;
address public owner;
// Duration of the rewards (in seconds)
uint256 public rewardsDuration;
// Timestamp of when the staking starts
uint256 public startsAt;
// Timestamp of when the staking ends
uint256 public endsAt;
// Timestamp of the reward updated
uint256 public lastUpdateTime;
// Reward per second (total rewards / duration)
uint256 public rewardRatePerSec;
// Reward per token stored
uint256 public rewardPerTokenStored;
bool public isPaused;
// Total staked
uint256 public totalRewards;
// Raw amount staked by all users
uint256 public totalStaked;
// Total staked with each user multiplier applied
uint256 public totalWeightedStake;
// User address => array of the staking info
mapping(address => StakingInfo[]) public userStakingInfo;
// it has to be evaluated on a user basis
enum StakeTimeOptions {
Duration,
EndTime
}
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event TokenRecovered(address token, uint256 amount);
constructor(
address _stakingToken,
address _rewardToken,
uint256 _rewardsTokenDecimals,
address _multiplier,
address _penaltyFeeCalculator
) {
owner = msg.sender;
stakingToken = IERC20(_stakingToken);
rewardsToken = IERC20(_rewardToken);
rewardsTokenDecimals = _rewardsTokenDecimals;
rewardsMultiplier = IMultiplier(_multiplier);
penaltyFeeCalculator = IPenaltyFee(_penaltyFeeCalculator);
}
/* ========== VIEWS ========== */
/**
* Calculates how much rewards a user has earned up to current block, every time the user stakes/unstakes/withdraw.
* We update "rewards[_user]" with how much they are entitled to, up to current block.
* Next time we calculate how much they earned since last update and accumulate on rewards[_user].
*/
function getUserRewards(address _user, uint256 _stakeNumber) public view returns (uint256) {
uint256 weightedAmount = rewardsMultiplier.applyMultiplier(
userStakingInfo[_user][_stakeNumber].stakedAmount,
userStakingInfo[_user][_stakeNumber].duration
);
uint256 rewardsSinceLastUpdate = ((weightedAmount * (rewardPerToken() - userStakingInfo[_user][_stakeNumber].rewardPerTokenPaid)) /
(100**rewardsTokenDecimals));
return rewardsSinceLastUpdate + userStakingInfo[_user][_stakeNumber].rewards;
}
function lastTimeRewardApplicable() public view returns (uint256) {
return block.timestamp < endsAt ? block.timestamp : endsAt;
}
function rewardPerToken() public view returns (uint256) {
if (totalStaked == 0) {
return rewardPerTokenStored;
}
uint256 howLongSinceLastTime = lastTimeRewardApplicable() - lastUpdateTime;
return rewardPerTokenStored + ((rewardRatePerSec * howLongSinceLastTime * (100**rewardsTokenDecimals)) / totalWeightedStake);
}
function getUserStakes(address _user) external view returns (StakingInfo[] memory) {
return userStakingInfo[_user];
}
/* ========== MUTATIVE FUNCTIONS ========== */
function _updateReward(address _user, uint256 _stakeNumber) private {
rewardPerTokenStored = rewardPerToken();
lastUpdateTime = lastTimeRewardApplicable();
if (_user != address(0)) {
userStakingInfo[_user][_stakeNumber].rewards = getUserRewards(_user, _stakeNumber);
userStakingInfo[_user][_stakeNumber].rewardPerTokenPaid = rewardPerTokenStored;
}
}
function stake(
uint256 _amount,
StakeTimeOptions _stakeTimeOption,
uint256 _unstakeTime
) external nonReentrant inProgress {
require(_amount > 0, "TrestleStakingPool::stake: amount = 0");
uint256 _minimumStakeTimestamp = _stakeTimeOption == StakeTimeOptions.Duration ? block.timestamp + _unstakeTime : _unstakeTime;
require(_minimumStakeTimestamp > startsAt, "TrestleStakingPool::stake: _minimumStakeTimestamp <= startsAt");
require(_minimumStakeTimestamp > block.timestamp, "TrestleStakingPool::stake: _minimumStakeTimestamp <= block.timestamp");
uint256 _stakeDuration = _minimumStakeTimestamp - block.timestamp;
_updateReward(address(0), 0);
StakingInfo memory _stakingInfo = StakingInfo({
stakedAmount: _amount,
minimumStakeTimestamp: _minimumStakeTimestamp,
duration: _stakeDuration,
rewardPerTokenPaid: rewardPerTokenStored,
rewards: 0
});
userStakingInfo[msg.sender].push(_stakingInfo);
uint256 _stakeNumber = userStakingInfo[msg.sender].length - 1;
uint256 weightedStake = rewardsMultiplier.applyMultiplier(_amount, _stakeDuration);
totalWeightedStake += weightedStake;
totalStaked += _amount;
stakingToken.safeTransferFrom(msg.sender, address(this), _amount);
emit Staked(msg.sender, _stakeNumber, _amount);
}
function unstake(uint256 _amount, uint256 _stakeNumber) external nonReentrant {
require(_amount > 0, "TrestleStakingPool::unstake: amount = 0");
require(_amount <= userStakingInfo[msg.sender][_stakeNumber].stakedAmount, "TrestleStakingPool::unstake: not enough balance");
_updateReward(msg.sender, _stakeNumber);
uint256 currentWeightedStake = rewardsMultiplier.applyMultiplier(
userStakingInfo[msg.sender][_stakeNumber].stakedAmount,
userStakingInfo[msg.sender][_stakeNumber].duration
);
totalWeightedStake -= currentWeightedStake;
totalStaked -= _amount;
uint256 penaltyFee = 0;
if (block.timestamp < userStakingInfo[msg.sender][_stakeNumber].minimumStakeTimestamp) {
penaltyFee = penaltyFeeCalculator.calculate(_amount, userStakingInfo[msg.sender][_stakeNumber].duration, address(this));
if (penaltyFee > _amount) {
penaltyFee = _amount;
}
}
userStakingInfo[msg.sender][_stakeNumber].stakedAmount -= _amount;
if (userStakingInfo[msg.sender][_stakeNumber].stakedAmount == 0) {
_claimRewards(msg.sender, _stakeNumber);
// remove the staking info from array
userStakingInfo[msg.sender][_stakeNumber] = userStakingInfo[msg.sender][userStakingInfo[msg.sender].length - 1];
userStakingInfo[msg.sender].pop();
} else {
// update the weighted stake
uint256 newWeightedStake = rewardsMultiplier.applyMultiplier(
userStakingInfo[msg.sender][_stakeNumber].stakedAmount,
userStakingInfo[msg.sender][_stakeNumber].duration
);
totalWeightedStake += newWeightedStake;
}
if (penaltyFee > 0) {
stakingToken.safeTransfer(BURN_ADDRESS, penaltyFee);
_amount -= penaltyFee;
}
stakingToken.safeTransfer(msg.sender, _amount);
emit Unstaked(msg.sender, _stakeNumber, _amount);
}
function _claimRewards(address _user, uint256 _stakeNumber) private {
uint256 reward = userStakingInfo[_user][_stakeNumber].rewards;
if (reward > 0) {
userStakingInfo[_user][_stakeNumber].rewards = 0;
rewardsToken.safeTransfer(_user, reward);
emit RewardPaid(_user, _stakeNumber, reward);
}
}
function claimRewards(uint256 _stakeNumber) external nonReentrant {
_updateReward(msg.sender, _stakeNumber);
_claimRewards(msg.sender, _stakeNumber);
}
/* ========== RESTRICTED FUNCTIONS ========== */
function initializeStaking(
uint256 _startsAt,
uint256 _rewardsDuration,
uint256 _amount
) external nonReentrant onlyOwner {
require(_startsAt > block.timestamp, "TrestleStakingPool::initializeStaking: _startsAt must be in the future");
require(_rewardsDuration > 0, "TrestleStakingPool::initializeStaking: _rewardsDuration = 0");
require(_amount > 0, "TrestleStakingPool::initializeStaking: _amount = 0");
require(startsAt == 0, "TrestleStakingPool::initializeStaking: staking already started");
_updateReward(address(0), 0);
rewardsDuration = _rewardsDuration;
startsAt = _startsAt;
endsAt = _startsAt + _rewardsDuration;
// add the amount to the pool
uint256 initialAmount = rewardsToken.balanceOf(address(this));
rewardsToken.safeTransferFrom(msg.sender, address(this), _amount);
uint256 actualAmount = rewardsToken.balanceOf(address(this)) - initialAmount;
totalRewards = actualAmount;
rewardRatePerSec = actualAmount / _rewardsDuration;
// set the staking to in progress
isPaused = false;
}
function resumeStaking() external onlyOwner {
require(rewardRatePerSec > 0, "TrestleStakingPool::startStaking: reward rate = 0");
require(isPaused, "TrestleStakingPool::startStaking: staking already started");
isPaused = false;
}
function pauseStaking() external onlyOwner {
require(!isPaused, "TrestleStakingPool::pauseStaking: staking already paused");
isPaused = true;
}
function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner {
IERC20(tokenAddress).safeTransfer(owner, tokenAmount);
emit TokenRecovered(tokenAddress, tokenAmount);
}
function transferOwnership(address _newOwner) external onlyOwner {
address currentOwner = owner;
owner = _newOwner;
emit OwnershipTransferred(currentOwner, _newOwner);
}
/* ========== MODIFIERS ========== */
modifier inProgress() {
require(!isPaused, "TrestleStakingPool::initialized: staking is paused");
require(startsAt <= block.timestamp, "TrestleStakingPool::initialized: staking has not started yet");
require(endsAt > block.timestamp, "TrestleStakingPool::notFinished: staking has finished");
_;
}
modifier onlyOwner() {
require(msg.sender == owner, "TrestleStakingPool::onlyOwner: not authorized");
_;
}
}
{
"compilationTarget": {
"TrestleStakingPool.sol": "TrestleStakingPool"
},
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 1000
},
"remappings": []
}
[{"inputs":[{"internalType":"address","name":"_stakingToken","type":"address"},{"internalType":"address","name":"_rewardToken","type":"address"},{"internalType":"uint256","name":"_rewardsTokenDecimals","type":"uint256"},{"internalType":"address","name":"_multiplier","type":"address"},{"internalType":"address","name":"_penaltyFeeCalculator","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"stakeNumber","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"stakeNumber","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"TokenRecovered","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"stakeNumber","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Unstaked","type":"event"},{"inputs":[],"name":"BURN_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_stakeNumber","type":"uint256"}],"name":"claimRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"endsAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"},{"internalType":"uint256","name":"_stakeNumber","type":"uint256"}],"name":"getUserRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_user","type":"address"}],"name":"getUserStakes","outputs":[{"components":[{"internalType":"uint256","name":"stakedAmount","type":"uint256"},{"internalType":"uint256","name":"minimumStakeTimestamp","type":"uint256"},{"internalType":"uint256","name":"duration","type":"uint256"},{"internalType":"uint256","name":"rewardPerTokenPaid","type":"uint256"},{"internalType":"uint256","name":"rewards","type":"uint256"}],"internalType":"struct IStakingPool.StakingInfo[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_startsAt","type":"uint256"},{"internalType":"uint256","name":"_rewardsDuration","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"initializeStaking","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"isPaused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastTimeRewardApplicable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastUpdateTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pauseStaking","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"penaltyFeeCalculator","outputs":[{"internalType":"contract IPenaltyFee","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"tokenAmount","type":"uint256"}],"name":"recoverERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"resumeStaking","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardPerTokenStored","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardRatePerSec","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsMultiplier","outputs":[{"internalType":"contract IMultiplier","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsTokenDecimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"enum TrestleStakingPool.StakeTimeOptions","name":"_stakeTimeOption","type":"uint8"},{"internalType":"uint256","name":"_unstakeTime","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"startsAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalRewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalStaked","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalWeightedStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"uint256","name":"_stakeNumber","type":"uint256"}],"name":"unstake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"userStakingInfo","outputs":[{"internalType":"uint256","name":"stakedAmount","type":"uint256"},{"internalType":"uint256","name":"minimumStakeTimestamp","type":"uint256"},{"internalType":"uint256","name":"duration","type":"uint256"},{"internalType":"uint256","name":"rewardPerTokenPaid","type":"uint256"},{"internalType":"uint256","name":"rewards","type":"uint256"}],"stateMutability":"view","type":"function"}]