// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
/**
* @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;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
contract DoggyAiStake is Ownable, ReentrancyGuard {
IERC20 public stakingToken;
bool public isEarlyWithdrawal;
uint256 public minStake = 10 * 10 ** 18;
uint256 public stakePeriod;
uint256 public totalStaked;
uint public constantTotalFunds;
uint public totalFund;
uint public rewardRate;
event Staked(address indexed, uint256 amount);
event Claimed(address indexed, uint256 amount);
event Withdrawn(address indexed, uint256 amount);
event PoolRefilled(
address indexed,
uint256 amount,
bool isEarlyWithdral,
uint256 newStakePeriod,
uint256 amountMinStake
);
struct Stake {
uint256 amount;
uint256 startTime;
uint256 lastClaimTimestamp;
}
mapping(address => uint256) public userTotalStaked;
mapping(address => Stake[]) public stakes;
modifier _checkRewardRate() {
if (totalStaked == 0) {
rewardRate = ((totalFund / stakePeriod) / minStake);
if (rewardRate == 0) {
rewardRate = 1;
}
} else {
rewardRate = ((totalFund / stakePeriod) / totalStaked);
if (rewardRate == 0) {
rewardRate = 1;
}
}
_;
}
constructor(
address DoggyAi,
address initialOwner,
uint256 _stakePeriod,
uint amountToFill
) Ownable(initialOwner) {
stakingToken = IERC20(DoggyAi);
isEarlyWithdrawal = false;
stakePeriod = _stakePeriod * 1 days;
constantTotalFunds = amountToFill;
totalFund = constantTotalFunds;
rewardRate = (((totalFund / stakePeriod) / 10) * 10 ** 18);
if (rewardRate == 0) {
rewardRate = 1;
}
}
function getStakes(
address user,
uint stakesIndex
) public view returns (Stake memory) {
return stakes[user][stakesIndex];
}
function calculateReward(
address userAddress,
uint256 stakeIndex
) public view returns (uint256) {
Stake storage userStake = stakes[userAddress][stakeIndex];
uint256 elapsedSeconds = block.timestamp - userStake.lastClaimTimestamp;
return (userStake.amount * elapsedSeconds * rewardRate);
}
function getUserStakes(
address userAddress
) external view returns (Stake[] memory userStakes) {
return stakes[userAddress];
}
function stake(uint256 _amount) public _checkRewardRate {
require(
_amount >= minStake,
"The amount must be greater than minimum 10 tokens"
);
userTotalStaked[msg.sender] += _amount;
stakes[msg.sender].push(
Stake(_amount, block.timestamp, block.timestamp)
);
require(
stakingToken.transferFrom(msg.sender, address(this), _amount),
"Token transfer failed"
);
totalStaked += _amount;
emit Staked(msg.sender, _amount);
}
function calculatePoolPercentage() external view returns (uint256) {
return (totalFund / constantTotalFunds) * 100;
}
function claimReward(uint256 stakeIndex) internal {
Stake storage userStake = stakes[msg.sender][stakeIndex];
uint256 rewardAmount = calculateReward(msg.sender, stakeIndex);
require(rewardAmount > 0, "No reward available");
require(rewardAmount <= totalFund, "Not enough funds in contract");
userStake.lastClaimTimestamp = block.timestamp;
require(
stakingToken.transfer(msg.sender, rewardAmount),
"Token transfer failed"
);
unchecked {
totalFund -= rewardAmount;
}
emit Claimed(msg.sender, rewardAmount);
}
function claimAllRewards() external nonReentrant _checkRewardRate {
require(isEarlyWithdrawal, "Early claim is not allowed");
Stake[] memory userStakes = stakes[msg.sender];
for (uint256 i; i < userStakes.length; i++) {
rewardRate = ((totalFund / stakePeriod) / totalStaked);
if (rewardRate == 0) {
rewardRate = 1;
}
claimReward(i);
}
}
function claimAndStake() public nonReentrant _checkRewardRate {
require(isEarlyWithdrawal, "Early claim is not allowed");
Stake[] memory userStakes = stakes[msg.sender];
for (uint256 i; i < userStakes.length; i++) {
uint reward = calculateReward(msg.sender, i);
require(reward > 0, "No reward available");
require(
userStakes[i].amount + reward <= totalFund,
"Not enough funds in contract"
);
totalFund -= reward;
totalStaked += reward;
userTotalStaked[msg.sender] += reward;
stakes[msg.sender].push(
Stake(reward, block.timestamp, block.timestamp)
);
}
}
function withdraw() public nonReentrant _checkRewardRate {
Stake[] storage userStake = stakes[msg.sender];
uint i;
for (i; i < userStake.length; i++) {
if (userStake[i].amount <= 0) {
revert("The amount must be greater than minimum 10 tokens");
}
require(isEarlyWithdrawal, "Early withdrawal is not allowed");
uint256 rewardAmount = calculateReward(msg.sender, i);
require(
stakingToken.transfer(
msg.sender,
userStake[i].amount + rewardAmount
),
"Token transfer failed"
);
userTotalStaked[msg.sender] -= userStake[i].amount;
totalStaked -= userStake[i].amount;
totalFund -= rewardAmount;
emit Withdrawn(msg.sender, userStake[i].amount + rewardAmount);
delete stakes[msg.sender];
}
}
function refillPool(
uint256 amountToRefill,
bool isLock,
uint256 newStakePeriod,
uint256 newMinStake
) public onlyOwner {
require(
newStakePeriod > 0,
"New stake period should be greater than 0"
);
require(amountToRefill > 0, "Amount to refill must be greater than 0");
require(
stakingToken.transferFrom(
msg.sender,
address(this),
amountToRefill
),
"Your transaction is not valid"
);
toggleEarlyWithdrawal(isLock);
stakePeriod = newStakePeriod * 1 days;
setMinStake(minStake);
constantTotalFunds = amountToRefill + totalFund;
totalFund = constantTotalFunds;
if (totalStaked == 0) {
rewardRate = ((totalFund / stakePeriod) / minStake);
if (rewardRate == 0) {
rewardRate = 1;
}
emit PoolRefilled(
msg.sender,
amountToRefill,
isLock,
newStakePeriod,
newMinStake
);
} else {
rewardRate = ((totalFund / stakePeriod) / totalStaked);
if (rewardRate == 0) {
rewardRate = 1;
}
emit PoolRefilled(
msg.sender,
amountToRefill,
isLock,
newStakePeriod,
newMinStake
);
}
}
function toggleEarlyWithdrawal(bool _isEarlyWithdrawal) public onlyOwner {
isEarlyWithdrawal = _isEarlyWithdrawal;
}
function setMinStake(uint256 newMinStake) public onlyOwner {
minStake = newMinStake;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.20;
/**
* @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 value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` 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 value) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {Context} from "../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.
*
* The initial owner is set to the address provided by the deployer. 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;
/**
* @dev The caller account is not authorized to perform an operation.
*/
error OwnableUnauthorizedAccount(address account);
/**
* @dev The owner is not a valid owner account. (eg. `address(0)`)
*/
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the address provided by the deployer as the initial owner.
*/
constructor(address initialOwner) {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
/**
* @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 {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling 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 {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_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);
}
}
{
"compilationTarget": {
"contracts/DoggyAiStaking.sol": "DoggyAiStake"
},
"evmVersion": "paris",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"details": {
"constantOptimizer": true,
"cse": true,
"deduplicate": true,
"inliner": true,
"jumpdestRemover": true,
"orderLiterals": true,
"peephole": true,
"yul": true,
"yulDetails": {
"optimizerSteps": "u:fDnTOc",
"stackAllocation": true
}
},
"runs": 200
},
"remappings": [],
"viaIR": true
}
[{"inputs":[{"internalType":"address","name":"DoggyAi","type":"address"},{"internalType":"address","name":"initialOwner","type":"address"},{"internalType":"uint256","name":"_stakePeriod","type":"uint256"},{"internalType":"uint256","name":"amountToFill","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[],"name":"ReentrancyGuardReentrantCall","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Claimed","type":"event"},{"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":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"bool","name":"isEarlyWithdral","type":"bool"},{"indexed":false,"internalType":"uint256","name":"newStakePeriod","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amountMinStake","type":"uint256"}],"name":"PoolRefilled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawn","type":"event"},{"inputs":[],"name":"calculatePoolPercentage","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"userAddress","type":"address"},{"internalType":"uint256","name":"stakeIndex","type":"uint256"}],"name":"calculateReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimAllRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimAndStake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"constantTotalFunds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"stakesIndex","type":"uint256"}],"name":"getStakes","outputs":[{"components":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"lastClaimTimestamp","type":"uint256"}],"internalType":"struct DoggyAiStake.Stake","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"userAddress","type":"address"}],"name":"getUserStakes","outputs":[{"components":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"lastClaimTimestamp","type":"uint256"}],"internalType":"struct DoggyAiStake.Stake[]","name":"userStakes","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isEarlyWithdrawal","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minStake","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountToRefill","type":"uint256"},{"internalType":"bool","name":"isLock","type":"bool"},{"internalType":"uint256","name":"newStakePeriod","type":"uint256"},{"internalType":"uint256","name":"newMinStake","type":"uint256"}],"name":"refillPool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rewardRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"newMinStake","type":"uint256"}],"name":"setMinStake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakePeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"stakes","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"lastClaimTimestamp","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"stakingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bool","name":"_isEarlyWithdrawal","type":"bool"}],"name":"toggleEarlyWithdrawal","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalFund","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalStaked","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":"address","name":"","type":"address"}],"name":"userTotalStaked","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]