Contract Source Code:
File 1 of 1 : NFYStaking
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
/**
* @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);
}
// File: @openzeppelin/contracts/math/SafeMath.sol
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: @openzeppelin/contracts/utils/Address.sol
pragma solidity ^0.6.2;
/**
* @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
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies in extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
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");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(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");
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol
pragma solidity ^0.6.0;
/**
* @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 SafeMath for uint256;
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'
// solhint-disable-next-line max-line-length
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).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_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(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
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: @openzeppelin/contracts/GSN/Context.sol
pragma solidity ^0.6.0;
/*
* @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 GSN 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 payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: contracts/Ownable.sol
pragma solidity ^0.6.10;
contract Ownable is Context {
address payable public owner;
event TransferredOwnership(address _previous, address _next, uint256 _time);
event AddedPlatformAddress(address _platformAddress, uint256 _time);
modifier onlyOwner() {
require(_msgSender() == owner, "Owner only");
_;
}
modifier onlyPlatform() {
require(platformAddress[_msgSender()] == true, "Only Platform");
_;
}
mapping(address => bool) platformAddress;
constructor() public {
owner = _msgSender();
}
function transferOwnership(address payable _owner) public onlyOwner() {
address previousOwner = owner;
owner = _owner;
emit TransferredOwnership(previousOwner, owner, now);
}
function addPlatformAddress(address _platformAddress) public onlyOwner() {
platformAddress[_platformAddress] = true;
emit AddedPlatformAddress(_platformAddress, now);
}
}
// File: contracts/NFYStaking.sol
pragma solidity ^0.6.10;
interface INFYStakingNFT {
function nftTokenId(address _stakeholder) external view returns(uint256 id);
function revertNftTokenId(address _stakeholder, uint256 _tokenId) external;
function ownerOf(uint256 tokenId) external view returns (address owner);
function balanceOf(address owner) external view returns (uint256 balance);
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
}
contract NFYStaking is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
struct NFT {
address _addressOfMinter;
uint256 _NFYDeposited;
bool _inCirculation;
uint256 _rewardDebt;
}
event StakeCompleted(address _staker, uint256 _amount, uint256 _tokenId, uint256 _totalStaked, uint256 _time);
event WithdrawCompleted(address _staker, uint256 _amount, uint256 _tokenId, uint256 _time);
event PoolUpdated(uint256 _blocksRewarded, uint256 _amountRewarded, uint256 _time);
event RewardsClaimed(address _staker, uint256 _rewardsClaimed, uint256 _tokenId, uint256 _time);
event RewardsCompounded(address _staker, uint256 _rewardsCompounded, uint256 _tokenId, uint256 _totalStaked, uint256 _time);
event MintedToken(address _staker, uint256 _tokenId, uint256 _time);
event TotalUnstaked(uint256 _total);
IERC20 public NFYToken;
INFYStakingNFT public StakingNFT;
address public rewardPool;
address public staking;
uint256 public dailyReward;
uint256 public accNfyPerShare;
uint256 public lastRewardBlock;
uint256 public totalStaked;
mapping(uint256 => NFT) public NFTDetails;
// Constructor will set the address of NFY token and address of NFY staking NFT
constructor(address _NFYToken, address _StakingNFT, address _staking, address _rewardPool, uint256 _dailyReward) Ownable() public {
NFYToken = IERC20(_NFYToken);
StakingNFT = INFYStakingNFT(_StakingNFT);
staking = _staking;
rewardPool = _rewardPool;
// 10:30 EST October 29th
lastRewardBlock = 11152600;
setDailyReward(_dailyReward);
accNfyPerShare = 0;
}
// 6500 blocks in average day --- decimals * NFY balance of rewardPool / blocks / 10000 * dailyReward (in hundredths of %) = rewardPerBlock
function getRewardPerBlock() public view returns(uint256) {
return NFYToken.balanceOf(rewardPool).div(6500).div(10000).mul(dailyReward);
}
// % of reward pool to be distributed each day --- in hundredths of % 30 == 0.3%
function setDailyReward(uint256 _dailyReward) public onlyOwner {
dailyReward = _dailyReward;
}
// Function that will get balance of a NFY balance of a certain stake
function getNFTBalance(uint256 _tokenId) public view returns(uint256 _amountStaked) {
return NFTDetails[_tokenId]._NFYDeposited;
}
// Function that will check if a NFY stake NFT is in circulation
function checkIfNFTInCirculation(uint256 _tokenId) public view returns(bool _inCirculation) {
return NFTDetails[_tokenId]._inCirculation;
}
// Function that returns NFT's pending rewards
function pendingRewards(uint256 _NFT) public view returns(uint256) {
NFT storage nft = NFTDetails[_NFT];
uint256 _accNfyPerShare = accNfyPerShare;
if (block.number > lastRewardBlock && totalStaked != 0) {
uint256 blocksToReward = block.number.sub(lastRewardBlock);
uint256 nfyReward = blocksToReward.mul(getRewardPerBlock());
_accNfyPerShare = _accNfyPerShare.add(nfyReward.mul(1e18).div(totalStaked));
}
return nft._NFYDeposited.mul(_accNfyPerShare).div(1e18).sub(nft._rewardDebt);
}
// Get total rewards for all of user's NFY nfts
function getTotalRewards(address _address) public view returns(uint256) {
uint256 totalRewards;
for(uint256 i = 0; i < StakingNFT.balanceOf(_address); i++) {
uint256 _rewardPerNFT = pendingRewards(StakingNFT.tokenOfOwnerByIndex(_address, i));
totalRewards = totalRewards.add(_rewardPerNFT);
}
return totalRewards;
}
// Get total stake for all user's NFY nfts
function getTotalBalance(address _address) public view returns(uint256) {
uint256 totalBalance;
for(uint256 i = 0; i < StakingNFT.balanceOf(_address); i++) {
uint256 _balancePerNFT = getNFTBalance(StakingNFT.tokenOfOwnerByIndex(_address, i));
totalBalance = totalBalance.add(_balancePerNFT);
}
return totalBalance;
}
// Function that updates NFY pool
function updatePool() public {
if (block.number <= lastRewardBlock) {
return;
}
if (totalStaked == 0) {
lastRewardBlock = block.number;
return;
}
uint256 blocksToReward = block.number.sub(lastRewardBlock);
uint256 nfyReward = blocksToReward.mul(getRewardPerBlock());
//Approve nfyReward here
NFYToken.transferFrom(rewardPool, address(this), nfyReward);
accNfyPerShare = accNfyPerShare.add(nfyReward.mul(1e18).div(totalStaked));
lastRewardBlock = block.number;
emit PoolUpdated(blocksToReward, nfyReward, now);
}
// Function that lets user stake NFY
function stakeNFY(uint256 _amount) public {
require(_amount > 0, "Can not stake 0 NFY");
require(NFYToken.balanceOf(_msgSender()) >= _amount, "Do not have enough NFY to stake");
updatePool();
if(StakingNFT.nftTokenId(_msgSender()) == 0){
addStakeholder(_msgSender());
}
NFT storage nft = NFTDetails[StakingNFT.nftTokenId(_msgSender())];
if(nft._NFYDeposited > 0) {
uint256 _pendingRewards = nft._NFYDeposited.mul(accNfyPerShare).div(1e18).sub(nft._rewardDebt);
if(_pendingRewards > 0) {
NFYToken.transfer(_msgSender(), _pendingRewards);
emit RewardsClaimed(_msgSender(), _pendingRewards, StakingNFT.nftTokenId(_msgSender()), now);
}
}
NFYToken.transferFrom(_msgSender(), address(this), _amount);
nft._NFYDeposited = nft._NFYDeposited.add(_amount);
totalStaked = totalStaked.add(_amount);
nft._rewardDebt = nft._NFYDeposited.mul(accNfyPerShare).div(1e18);
emit StakeCompleted(_msgSender(), _amount, StakingNFT.nftTokenId(_msgSender()), nft._NFYDeposited, now);
}
function addStakeholder(address _stakeholder) private {
(bool success, bytes memory data) = staking.call(abi.encodeWithSignature("mint(address)", _stakeholder));
require(success == true, "Mint call failed");
NFTDetails[StakingNFT.nftTokenId(_msgSender())]._addressOfMinter = _stakeholder;
NFTDetails[StakingNFT.nftTokenId(_msgSender())]._inCirculation = true;
}
function addStakeholderExternal(address _stakeholder) external onlyPlatform() {
(bool success, bytes memory data) = staking.call(abi.encodeWithSignature("mint(address)", _stakeholder));
require(success == true, "Mint call failed");
NFTDetails[StakingNFT.nftTokenId(_msgSender())]._addressOfMinter = _stakeholder;
NFTDetails[StakingNFT.nftTokenId(_msgSender())]._inCirculation = true;
}
// Function that will allow user to claim rewards
function claimRewards(uint256 _tokenId) public {
require(StakingNFT.ownerOf(_tokenId) == _msgSender(), "User is not owner of token");
require(NFTDetails[_tokenId]._inCirculation == true, "Stake has already been withdrawn");
updatePool();
NFT storage nft = NFTDetails[_tokenId];
uint256 _pendingRewards = nft._NFYDeposited.mul(accNfyPerShare).div(1e18).sub(nft._rewardDebt);
require(_pendingRewards > 0, "No rewards to claim!");
NFYToken.transfer(_msgSender(), _pendingRewards);
nft._rewardDebt = nft._NFYDeposited.mul(accNfyPerShare).div(1e18);
emit RewardsClaimed(_msgSender(), _pendingRewards, _tokenId, now);
}
// Function that will add NFY rewards to NFY staking NFT
function compoundRewards(uint256 _tokenId) public {
require(StakingNFT.ownerOf(_tokenId) == _msgSender(), "User is not owner of token");
require(NFTDetails[_tokenId]._inCirculation == true, "Stake has already been withdrawn");
updatePool();
NFT storage nft = NFTDetails[_tokenId];
uint256 _pendingRewards = nft._NFYDeposited.mul(accNfyPerShare).div(1e18).sub(nft._rewardDebt);
require(_pendingRewards > 0, "No rewards to compound!");
nft._NFYDeposited = nft._NFYDeposited.add(_pendingRewards);
totalStaked = totalStaked.add(_pendingRewards);
nft._rewardDebt = nft._NFYDeposited.mul(accNfyPerShare).div(1e18);
emit RewardsCompounded(_msgSender(), _pendingRewards, _tokenId, nft._NFYDeposited, now);
}
// Function that lets user claim all rewards from all their nfts
function claimAllRewards() public {
require(StakingNFT.balanceOf(_msgSender()) > 0, "User has no stake");
for(uint256 i = 0; i < StakingNFT.balanceOf(_msgSender()); i++) {
uint256 _currentNFT = StakingNFT.tokenOfOwnerByIndex(_msgSender(), i);
claimRewards(_currentNFT);
}
}
// Function that lets user compound all rewards from all their nfts
function compoundAllRewards() public {
require(StakingNFT.balanceOf(_msgSender()) > 0, "User has no stake");
for(uint256 i = 0; i < StakingNFT.balanceOf(_msgSender()); i++) {
uint256 _currentNFT = StakingNFT.tokenOfOwnerByIndex(_msgSender(), i);
compoundRewards(_currentNFT);
}
}
// Function that lets user unstake NFY in system. 5% fee that gets redistributed back to reward pool
function unstakeNFY(uint256 _tokenId) public {
// Require that user is owner of token id
require(StakingNFT.ownerOf(_tokenId) == _msgSender(), "User is not owner of token");
require(NFTDetails[_tokenId]._inCirculation == true, "Stake has already been withdrawn");
updatePool();
NFT storage nft = NFTDetails[_tokenId];
uint256 _pendingRewards = nft._NFYDeposited.mul(accNfyPerShare).div(1e18).sub(nft._rewardDebt);
uint256 amountStaked = getNFTBalance(_tokenId);
uint256 stakeAfterFees = amountStaked.div(100).mul(95);
uint256 userReceives = amountStaked.div(100).mul(95).add(_pendingRewards);
uint256 fee = amountStaked.div(100).mul(5);
uint256 beingWithdrawn = nft._NFYDeposited;
nft._NFYDeposited = 0;
nft._inCirculation = false;
totalStaked = totalStaked.sub(beingWithdrawn);
StakingNFT.revertNftTokenId(_msgSender(), _tokenId);
(bool success, bytes memory data) = staking.call(abi.encodeWithSignature("burn(uint256)", _tokenId));
require(success == true, "mint call failed");
NFYToken.transfer(_msgSender(), userReceives);
NFYToken.transfer(rewardPool, fee);
emit WithdrawCompleted(_msgSender(), stakeAfterFees, _tokenId, now);
emit RewardsClaimed(_msgSender(), _pendingRewards, _tokenId, now);
}
// Function that will unstake every user's NFY stake NFT for user
function unstakeAll() public {
require(StakingNFT.balanceOf(_msgSender()) > 0, "User has no stake");
while(StakingNFT.balanceOf(_msgSender()) > 0) {
uint256 _currentNFT = StakingNFT.tokenOfOwnerByIndex(_msgSender(), 0);
unstakeNFY(_currentNFT);
}
}
// Will increment value of staking NFT when trade occurs
function incrementNFTValue (uint256 _tokenId, uint256 _amount) external onlyPlatform() {
require(checkIfNFTInCirculation(_tokenId) == true, "Token not in circulation");
updatePool();
NFT storage nft = NFTDetails[_tokenId];
if(nft._NFYDeposited > 0) {
uint256 _pendingRewards = nft._NFYDeposited.mul(accNfyPerShare).div(1e18).sub(nft._rewardDebt);
if(_pendingRewards > 0) {
NFYToken.transfer(StakingNFT.ownerOf(_tokenId), _pendingRewards);
emit RewardsClaimed(StakingNFT.ownerOf(_tokenId), _pendingRewards, _tokenId, now);
}
}
NFTDetails[_tokenId]._NFYDeposited = NFTDetails[_tokenId]._NFYDeposited.add(_amount);
nft._rewardDebt = nft._NFYDeposited.mul(accNfyPerShare).div(1e18);
}
// Will decrement value of staking NFT when trade occurs
function decrementNFTValue (uint256 _tokenId, uint256 _amount) external onlyPlatform() {
require(checkIfNFTInCirculation(_tokenId) == true, "Token not in circulation");
require(getNFTBalance(_tokenId) >= _amount, "Not enough stake in NFT");
updatePool();
NFT storage nft = NFTDetails[_tokenId];
if(nft._NFYDeposited > 0) {
uint256 _pendingRewards = nft._NFYDeposited.mul(accNfyPerShare).div(1e18).sub(nft._rewardDebt);
if(_pendingRewards > 0) {
NFYToken.transfer(StakingNFT.ownerOf(_tokenId), _pendingRewards);
emit RewardsClaimed(StakingNFT.ownerOf(_tokenId), _pendingRewards, _tokenId, now);
}
}
NFTDetails[_tokenId]._NFYDeposited = NFTDetails[_tokenId]._NFYDeposited.sub(_amount);
nft._rewardDebt = nft._NFYDeposited.mul(accNfyPerShare).div(1e18);
}
}