Contract Name:
StakingContractV1
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {ContextUpgradeable} from "../utils/ContextUpgradeable.sol";
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* 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 OwnableUpgradeable is Initializable, ContextUpgradeable {
/// @custom:storage-location erc7201:openzeppelin.storage.Ownable
struct OwnableStorage {
address _owner;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Ownable")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant OwnableStorageLocation = 0x9016d09d72d40fdae2fd8ceac6b6234c7706214fd39c1cd1e609a0528c199300;
function _getOwnableStorage() private pure returns (OwnableStorage storage $) {
assembly {
$.slot := OwnableStorageLocation
}
}
/**
* @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.
*/
function __Ownable_init(address initialOwner) internal onlyInitializing {
__Ownable_init_unchained(initialOwner);
}
function __Ownable_init_unchained(address initialOwner) internal onlyInitializing {
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) {
OwnableStorage storage $ = _getOwnableStorage();
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 {
OwnableStorage storage $ = _getOwnableStorage();
address oldOwner = $._owner;
$._owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.20;
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
* reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
* case an upgrade adds a module that needs to be initialized.
*
* For example:
*
* [.hljs-theme-light.nopadding]
* ```solidity
* contract MyToken is ERC20Upgradeable {
* function initialize() initializer public {
* __ERC20_init("MyToken", "MTK");
* }
* }
*
* contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
* function initializeV2() reinitializer(2) public {
* __ERC20Permit_init("MyToken");
* }
* }
* ```
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
* the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() {
* _disableInitializers();
* }
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Storage of the initializable contract.
*
* It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions
* when using with upgradeable contracts.
*
* @custom:storage-location erc7201:openzeppelin.storage.Initializable
*/
struct InitializableStorage {
/**
* @dev Indicates that the contract has been initialized.
*/
uint64 _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool _initializing;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00;
/**
* @dev The contract is already initialized.
*/
error InvalidInitialization();
/**
* @dev The contract is not initializing.
*/
error NotInitializing();
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint64 version);
/**
* @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
* `onlyInitializing` functions can be used to initialize parent contracts.
*
* Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any
* number of times. This behavior in the constructor can be useful during testing and is not expected to be used in
* production.
*
* Emits an {Initialized} event.
*/
modifier initializer() {
// solhint-disable-next-line var-name-mixedcase
InitializableStorage storage $ = _getInitializableStorage();
// Cache values to avoid duplicated sloads
bool isTopLevelCall = !$._initializing;
uint64 initialized = $._initialized;
// Allowed calls:
// - initialSetup: the contract is not in the initializing state and no previous version was
// initialized
// - construction: the contract is initialized at version 1 (no reininitialization) and the
// current contract is just being deployed
bool initialSetup = initialized == 0 && isTopLevelCall;
bool construction = initialized == 1 && address(this).code.length == 0;
if (!initialSetup && !construction) {
revert InvalidInitialization();
}
$._initialized = 1;
if (isTopLevelCall) {
$._initializing = true;
}
_;
if (isTopLevelCall) {
$._initializing = false;
emit Initialized(1);
}
}
/**
* @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
* contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
* used to initialize parent contracts.
*
* A reinitializer may be used after the original initialization step. This is essential to configure modules that
* are added through upgrades and that require initialization.
*
* When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
* cannot be nested. If one is invoked in the context of another, execution will revert.
*
* Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
* a contract, executing them in the right order is up to the developer or operator.
*
* WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization.
*
* Emits an {Initialized} event.
*/
modifier reinitializer(uint64 version) {
// solhint-disable-next-line var-name-mixedcase
InitializableStorage storage $ = _getInitializableStorage();
if ($._initializing || $._initialized >= version) {
revert InvalidInitialization();
}
$._initialized = version;
$._initializing = true;
_;
$._initializing = false;
emit Initialized(version);
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} and {reinitializer} modifiers, directly or indirectly.
*/
modifier onlyInitializing() {
_checkInitializing();
_;
}
/**
* @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}.
*/
function _checkInitializing() internal view virtual {
if (!_isInitializing()) {
revert NotInitializing();
}
}
/**
* @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
* Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
* to any version. It is recommended to use this to lock implementation contracts that are designed to be called
* through proxies.
*
* Emits an {Initialized} event the first time it is successfully executed.
*/
function _disableInitializers() internal virtual {
// solhint-disable-next-line var-name-mixedcase
InitializableStorage storage $ = _getInitializableStorage();
if ($._initializing) {
revert InvalidInitialization();
}
if ($._initialized != type(uint64).max) {
$._initialized = type(uint64).max;
emit Initialized(type(uint64).max);
}
}
/**
* @dev Returns the highest version that has been initialized. See {reinitializer}.
*/
function _getInitializedVersion() internal view returns (uint64) {
return _getInitializableStorage()._initialized;
}
/**
* @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
*/
function _isInitializing() internal view returns (bool) {
return _getInitializableStorage()._initializing;
}
/**
* @dev Returns a pointer to the storage namespace.
*/
// solhint-disable-next-line var-name-mixedcase
function _getInitializableStorage() private pure returns (InitializableStorage storage $) {
assembly {
$.slot := INITIALIZABLE_STORAGE
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
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
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol)
pragma solidity ^0.8.20;
import {Initializable} from "../proxy/utils/Initializable.sol";
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuardUpgradeable is Initializable {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant NOT_ENTERED = 1;
uint256 private constant ENTERED = 2;
/// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard
struct ReentrancyGuardStorage {
uint256 _status;
}
// keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff))
bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00;
function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) {
assembly {
$.slot := ReentrancyGuardStorageLocation
}
}
/**
* @dev Unauthorized reentrant call.
*/
error ReentrancyGuardReentrantCall();
function __ReentrancyGuard_init() internal onlyInitializing {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal onlyInitializing {
ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
$._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 {
ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
// On the first call to nonReentrant, _status will be NOT_ENTERED
if ($._status == ENTERED) {
revert ReentrancyGuardReentrantCall();
}
// Any calls to nonReentrant after this point will fail
$._status = ENTERED;
}
function _nonReentrantAfter() private {
ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
// 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) {
ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage();
return $._status == ENTERED;
}
}
// 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: UNLICENSED
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./StakingRecord.sol";
import "./StakingRateInfo.sol";
import "./StakingPeriod.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol";
contract StakingContractV1 is OwnableUpgradeable, ReentrancyGuardUpgradeable {
uint public constant DAY = 3600 * 24;
// uint public constant DAY = 1; // For test
address public upcAddress;
mapping (uint => StakingRateInfo) public stakingInfos;
mapping (address => bool) public staked;
StakingRecord[] public records;
uint public stakingAmountLimit;
uint public totalStakingAmount;
mapping (string=>address) public referralCodes;
uint public referralFee; //20%
event SetUPCAddress(address upcAddress);
event Stake(uint id, address staker, uint amount, uint stakedAt, uint stakingInfoID, string referralCode, uint reward, uint referralReward);
event Claim(uint id, address staker, uint claimAmount);
event ClaimReferralFee(uint id, address referrer, uint claimAmount);
event Deposit(uint amount);
event GenerateReferralCode(address staker, string code);
event SetStakingPeriod(uint id, StakingPeriod[] periods);
function initialvalue(address owner) initializer external {
stakingInfos[1].day = 180; stakingInfos[1].apy = 100;
stakingInfos[2].day = 90; stakingInfos[2].apy = 50;
stakingInfos[3].day = 30; stakingInfos[3].apy = 20;
// upcAddress = 0xCADC40cE57164b3193cCAAf0E5C498F8180DEF5f; //testnet
upcAddress = 0x487d62468282Bd04ddf976631C23128A425555EE; //mainnet
stakingAmountLimit = 10 ** 6 * 10 ** 5;
referralFee = 20;
__Ownable_init(owner);
__ReentrancyGuard_init();
}
function stake(uint amount, uint stakingInfoID, string memory referralCode) public nonReentrant {
require(amount >= 0, "It's not able to stake 0 UPC.");
require(isStakablePeriod(stakingInfoID), "Out of staking period.");
require(totalStakingAmount + amount <= stakingAmountLimit, "Staking amount limit exceeds.");
if (bytes(referralCode).length != 0) {
require(referralCodes[referralCode] != msg.sender, "Not able to use own referral code.");
}
require(IERC20(upcAddress).allowance(msg.sender, address(this)) >= amount, "UPC token is not allowed.");
require(IERC20(upcAddress).balanceOf(msg.sender) >= amount, "UPC token balance is not enough.");
require(IERC20(upcAddress).transferFrom(msg.sender, address(this), amount), "UPC token transfer failed.");
records.push(StakingRecord(msg.sender, amount, block.timestamp, false, stakingInfoID, referralCode, false));
totalStakingAmount += amount;
staked[msg.sender] = true;
emit Stake(records.length - 1, msg.sender, amount, block.timestamp, stakingInfoID, referralCode, finalClaimableAmount(records.length - 1), referralAmount(records.length - 1));
}
function isStakablePeriod(uint id) public view returns(bool) {
for (uint i = 0; i < stakingInfos[id].periods.length; i++) {
if (block.timestamp >= stakingInfos[id].periods[i].from && block.timestamp <= stakingInfos[id].periods[i].to) {
return true;
}
}
return false;
}
function isClaimable(uint id) public view returns(bool) {
if (records[id].claimed) {
return false;
}
if (block.timestamp - records[id].stakedAt < DAY * stakingInfos[records[id].stakingRateInfoID].day) {
return false;
}
return true;
}
function referralAmount(uint id) public view returns(uint) {
if (records[id].claimedReferralFee) {
return 0;
}
if (bytes(records[id].referralCode).length == 0) {
return 0;
}
if (referralCodes[records[id].referralCode] == address(0)) {
return 0;
}
return (records[id].amount * stakingInfos[records[id].stakingRateInfoID].apy * (DAY * stakingInfos[records[id].stakingRateInfoID].day) / 100 / 365 / DAY) * referralFee / 100;
}
function finalClaimableAmount(uint id) public view returns(uint) {
if (records[id].claimed) {
return 0;
}
return records[id].amount * stakingInfos[records[id].stakingRateInfoID].apy * (DAY * stakingInfos[records[id].stakingRateInfoID].day) / 100 / 365 / DAY;
}
function claim(uint id) public {
require(msg.sender == records[id].staker, "Only owner can claim.");
require(isClaimable(id), "This staking record is not able to claim.");
uint amount = finalClaimableAmount(id);
require(IERC20(upcAddress).transfer(msg.sender, records[id].amount + amount), "Claim failed.");
records[id].claimed = true;
emit Claim(id, msg.sender, amount);
}
function claimReferralFee(uint id) public {
require(msg.sender == referralCodes[records[id].referralCode], "Only referer can claim the referral fee.");
require(block.timestamp - records[id].stakedAt >= DAY * stakingInfos[records[id].stakingRateInfoID].day, "It is not able to claim, yet");
require(!records[id].claimedReferralFee, "Alreay claimed.");
uint amount = referralAmount(id);
require(IERC20(upcAddress).transfer(msg.sender, amount), "Claim failed.");
records[id].claimedReferralFee = true;
emit ClaimReferralFee(id, msg.sender, amount);
}
function generateReferralCode() public {
require(staked[msg.sender] == true, "You should have at least one staking record.");
string memory code = randomString(6);
referralCodes[code] = msg.sender;
emit GenerateReferralCode(msg.sender, code);
}
function deposit(uint amount) public onlyOwner {
require(IERC20(upcAddress).allowance(msg.sender, address(this)) >= amount, "UPC token is not allowed.");
require(IERC20(upcAddress).transferFrom(msg.sender, address(this), amount), "Deposit failed.");
emit Deposit(amount);
}
function shouldDeposit() public view returns(uint){
uint neccessaryAmount = neccessaryUPC();
if (neccessaryAmount < IERC20(upcAddress).balanceOf(address(this))) {
return 0;
}
return neccessaryAmount - IERC20(upcAddress).balanceOf(address(this));
}
function Withdrawable() public view returns(uint) {
uint neccessaryAmount = neccessaryUPC();
if (neccessaryAmount >= IERC20(upcAddress).balanceOf(address(this))) {
return 0;
}
return IERC20(upcAddress).balanceOf(address(this)) - neccessaryAmount;
}
function neccessaryUPC() private view returns(uint) {
uint ret = 0;
for (uint i = 0; i < records.length; i++) {
ret += finalClaimableAmount(i) + referralAmount(i);
if (!records[i].claimed) {
ret += records[i].amount;
}
}
return ret;
}
function withdraw(uint amount) public onlyOwner {
// bool isPeriodOver = true;
// for (uint id = 1; id <= 3; id++) {
// for (uint i = 0; i < stakingInfos[id].periods.length; i++) {
// if (block.timestamp < stakingInfos[id].periods[i].to) {
// isPeriodOver = false;
// break;
// }
// }
// }
// require(isPeriodOver, "It's able to stake now.");
require(IERC20(upcAddress).transfer(msg.sender, amount), "Withdraw failed.");
}
function setUPCAddress(address addr) public onlyOwner {
upcAddress = addr;
stakingAmountLimit = 10 ** 6 * 10 ** 5;
emit SetUPCAddress(addr);
}
function setStakingPeriod(uint id, StakingPeriod[] memory periods) public onlyOwner {
for (uint i = 0; i < stakingInfos[id].periods.length; i++) {
stakingInfos[id].periods.pop();
}
for (uint i = 0; i < periods.length; i++) {
stakingInfos[id].periods.push(periods[i]);
}
emit SetStakingPeriod(id, periods);
}
function setStakingLimit(uint limit) public onlyOwner {
stakingAmountLimit = limit;
}
function setReferralFee(uint fee) public onlyOwner {
require(fee <= 100, "Referral Fee should be less than 100%.");
referralFee = fee;
}
function randomString(uint size) private view returns(string memory){
bytes memory randomWord = new bytes(size);
// since we have 26 letters
bytes memory chars = new bytes(26);
chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for (uint i = 0; i < size; i++) {
uint randomNumber=random(26, i);
// Index access for string is not possible
randomWord[i] = chars[randomNumber];
}
return string(randomWord);
}
function random(uint number, uint randomIndex) public view returns(uint){
return uint(keccak256(abi.encodePacked(block.timestamp,block.prevrandao,
msg.sender,randomIndex))) % number;
}
function pushRecord(address staker, uint amount, uint stakedAt, uint stakingInfoID, string memory referralCode, bool claimed, bool claimedReferralFee) public onlyOwner {
records.push(StakingRecord(staker, amount, stakedAt, claimed, stakingInfoID, referralCode, claimedReferralFee));
totalStakingAmount += amount;
staked[staker] = true;
}
function pushReferralCodes(address staker, string memory code) public onlyOwner {
referralCodes[code] = staker;
}
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
struct StakingPeriod {
uint from;
uint to;
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
import "./StakingPeriod.sol";
struct StakingRateInfo {
uint day;
uint apy;
StakingPeriod[] periods;
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
struct StakingRecord {
address staker;
uint amount;
uint stakedAt;
bool claimed;
uint stakingRateInfoID;
string referralCode;
bool claimedReferralFee;
}