Contract Name:
FlowerNFTStaking
Contract Source Code:
File 1 of 1 : FlowerNFTStaking
// SPDX-License-Identifier: MIT
// File: @openzeppelin/[email protected]/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/[email protected]/token/ERC721/IERC721.sol
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
}
// File: @openzeppelin/[email protected]/token/ERC721/IERC721Receiver.sol
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// File: @openzeppelin/[email protected]/token/ERC20/IERC20.sol
// OpenZeppelin Contracts (last updated v4.9.0) (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);
}
// File: @openzeppelin/[email protected]/utils/Context.sol
// OpenZeppelin Contracts (last updated v4.9.4) (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;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
// File: @openzeppelin/[email protected]/access/Ownable.sol
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @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. 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 {
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);
}
}
// File: @openzeppelin/[email protected]/security/ReentrancyGuard.sol
// OpenZeppelin Contracts (last updated v4.9.0) (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;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// File: @openzeppelin/[email protected]/security/Pausable.sol
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
_requireNotPaused();
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
_requirePaused();
_;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Throws if the contract is paused.
*/
function _requireNotPaused() internal view virtual {
require(!paused(), "Pausable: paused");
}
/**
* @dev Throws if the contract is not paused.
*/
function _requirePaused() internal view virtual {
require(paused(), "Pausable: not paused");
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File: flowergrowop.sol
pragma solidity ^0.8.0;
interface IFlowerNFT {
function levels(uint256 tokenId) external view returns (uint256);
}
contract FlowerNFTStaking is Ownable, ReentrancyGuard, Pausable, IERC721Receiver {
IERC721 public flowerNFT;
IERC20 public flowerToken;
IERC721 public stonerToken;
uint256 public rewardRate = 1 ether;
uint256 public stonerBonusMultiplier = 10;
uint256 public flowerNFTBonusMultiplier = 5;
uint256 public tapBonusAmount = 0.1 ether;
uint256 public tapCooldown = 1 hours;
struct Stake {
uint256 tokenId;
uint256 stakedAt;
uint256 lastTapped;
}
mapping(address => Stake[]) public stakes;
mapping(uint256 => address) public stakedTokenOwners;
mapping(address => uint256[]) public stonerStakes;
event Staked(address indexed user, uint256[] flowerTokenIds, uint256[] stonerTokenIds);
event Unstaked(address indexed user, uint256[] flowerTokenIds, uint256[] stonerTokenIds);
event RewardClaimed(address indexed user, uint256 amount);
event TapBonusClaimed(address indexed user, uint256 amount);
event TokensWithdrawn(address indexed owner, uint256 amount);
event RewardRateUpdated(uint256 newRate);
event StonerBonusUpdated(uint256 newMultiplier);
event FlowerNFTBonusUpdated(uint256 newMultiplier);
event TapBonusUpdated(uint256 newAmount);
event TapCooldownUpdated(uint256 newCooldown);
constructor(address _flowerNFT, address _flowerToken, address _stonerToken) {
flowerNFT = IERC721(_flowerNFT);
flowerToken = IERC20(_flowerToken);
stonerToken = IERC721(_stonerToken);
}
/** ADMIN FUNCTIONS TO SET REWARD PARAMETERS **/
function setRewardRate(uint256 newRate) external onlyOwner {
require(newRate > 0, "Reward rate must be greater than zero");
rewardRate = newRate;
emit RewardRateUpdated(newRate);
}
function setStonerBonusMultiplier(uint256 newMultiplier) external onlyOwner {
require(newMultiplier >= 1, "Multiplier must be at least 1");
stonerBonusMultiplier = newMultiplier;
emit StonerBonusUpdated(newMultiplier);
}
function setFlowerNFTBonusMultiplier(uint256 newMultiplier) external onlyOwner {
require(newMultiplier >= 1, "Multiplier must be at least 1");
flowerNFTBonusMultiplier = newMultiplier;
emit FlowerNFTBonusUpdated(newMultiplier);
}
function setTapBonusAmount(uint256 newAmount) external onlyOwner {
require(newAmount > 0, "Bonus amount must be greater than zero");
tapBonusAmount = newAmount;
emit TapBonusUpdated(newAmount);
}
function setTapCooldown(uint256 newCooldown) external onlyOwner {
require(newCooldown > 0, "Cooldown must be greater than zero");
tapCooldown = newCooldown;
emit TapCooldownUpdated(newCooldown);
}
/** ADMIN FUNCTION TO WITHDRAW $FLOWER TOKENS **/
function withdrawTokens(uint256 amount) external onlyOwner {
require(amount > 0, "Amount must be greater than zero");
require(flowerToken.balanceOf(address(this)) >= amount, "Not enough tokens in contract");
flowerToken.transfer(msg.sender, amount);
emit TokensWithdrawn(msg.sender, amount);
}
/** STAKING MULTIPLE NFTs **/
function stakeMultiple(uint256[] memory flowerTokenIds, uint256[] memory stonerTokenIds) external nonReentrant whenNotPaused {
require(flowerTokenIds.length > 0 || stonerTokenIds.length > 0, "No NFTs provided");
for (uint256 i = 0; i < flowerTokenIds.length; i++) {
uint256 tokenId = flowerTokenIds[i];
require(flowerNFT.ownerOf(tokenId) == msg.sender, "You do not own this FlowerNFT");
require(stakedTokenOwners[tokenId] == address(0), "This NFT is already staked");
stakes[msg.sender].push(Stake({tokenId: tokenId, stakedAt: block.timestamp, lastTapped: 0}));
stakedTokenOwners[tokenId] = msg.sender;
flowerNFT.safeTransferFrom(msg.sender, address(this), tokenId);
}
for (uint256 i = 0; i < stonerTokenIds.length; i++) {
uint256 stonerId = stonerTokenIds[i];
require(stonerToken.ownerOf(stonerId) == msg.sender, "You do not own this StonerNFT");
stonerToken.safeTransferFrom(msg.sender, address(this), stonerId);
stonerStakes[msg.sender].push(stonerId);
}
emit Staked(msg.sender, flowerTokenIds, stonerTokenIds);
}
/** UNSTAKING MULTIPLE NFTs **/
function unstakeMultiple(uint256[] memory flowerTokenIds, uint256[] memory stonerTokenIds) external nonReentrant whenNotPaused {
require(flowerTokenIds.length > 0 || stonerTokenIds.length > 0, "No NFTs provided");
uint256 totalReward = 0;
for (uint256 i = 0; i < flowerTokenIds.length; i++) {
uint256 tokenId = flowerTokenIds[i];
require(stakedTokenOwners[tokenId] == msg.sender, "You do not own this staked NFT");
totalReward += calculateReward(msg.sender, tokenId);
_removeStake(msg.sender, tokenId);
flowerNFT.safeTransferFrom(address(this), msg.sender, tokenId);
}
require(stonerStakes[msg.sender].length >= stonerTokenIds.length, "Not enough staked StonerNFTs");
for (uint256 i = 0; i < stonerTokenIds.length; i++) {
uint256 stonerId = stonerTokenIds[i];
require(_removeStonerStake(msg.sender, stonerId), "StonerNFT not staked by user");
stonerToken.safeTransferFrom(address(this), msg.sender, stonerId);
}
if (totalReward > 0) {
flowerToken.transfer(msg.sender, totalReward);
emit RewardClaimed(msg.sender, totalReward);
}
emit Unstaked(msg.sender, flowerTokenIds, stonerTokenIds);
}
/** REWARD CALCULATION **/
function calculateReward(address user, uint256 tokenId) public view returns (uint256) {
for (uint256 i = 0; i < stakes[user].length; i++) {
if (stakes[user][i].tokenId == tokenId) {
uint256 timeStaked = block.timestamp - stakes[user][i].stakedAt;
uint256 baseReward = (timeStaked * getFlowerNFTLevel(tokenId) * rewardRate) / 1 days;
return baseReward;
}
}
return 0;
}
function getFlowerNFTLevel(uint256 tokenId) public view returns (uint256) {
require(address(flowerNFT) != address(0), "FlowerNFT contract not set");
return IFlowerNFT(address(flowerNFT)).levels(tokenId);
}
function _removeStake(address user, uint256 tokenId) internal {
for (uint256 i = 0; i < stakes[user].length; i++) {
if (stakes[user][i].tokenId == tokenId) {
stakes[user][i] = stakes[user][stakes[user].length - 1];
stakes[user].pop();
delete stakedTokenOwners[tokenId];
break;
}
}
}
function _removeStonerStake(address user, uint256 tokenId) internal returns (bool) {
uint256[] storage stakedNFTs = stonerStakes[user];
for (uint256 i = 0; i < stakedNFTs.length; i++) {
if (stakedNFTs[i] == tokenId) {
stakedNFTs[i] = stakedNFTs[stakedNFTs.length - 1];
stakedNFTs.pop();
return true;
}
}
return false;
}
function onERC721Received(address, address, uint256, bytes memory) public virtual override returns (bytes4) {
return this.onERC721Received.selector;
}
}