Contract Name:
GenericDrippingVault
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../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.
*
* 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 Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing 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);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (proxy/utils/Initializable.sol)
pragma solidity ^0.8.0;
/**
* @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 a proxied contract can't have 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.
*
* 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 initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(_initializing || !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @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 on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
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");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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;
}
}
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity 0.8.9;
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { Initializable } from "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import { ReentrancyGuard } from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
// ERC20 virtual deposit contract, with 11% in and out fees, 1% burned, 7% to drip pool, 1% to boosted stakers (boost by depositing another ERC20) 2% instant divs
contract GenericDrippingVault is Initializable, Ownable, ReentrancyGuard
{
using SafeERC20 for IERC20;
struct AccountInfo {
uint256 amount; // vdc token staked
uint256 burned; // boost burned
uint256 drip; // drip pool accumulated but not claimed
uint256 boost; // boost accumulated but not claimed
uint256 accDripDebt; // reward debt from PCS distribution algorithm
uint256 accBoostDebt; // reward debt from PCS distribution algorithm
bool whitelisted; // flag indicating whether or not account pays withdraw penalties
bool exists; // flag to index account
uint256 reserved0;
uint256 reserved1;
uint256 reserved2;
}
address constant FURNACE = 0x000000000000000000000000000000000000dEaD;
uint256 constant DEFAULT_LAUNCH_TIME = 1731337200; // Thu NOV 11 2024 15:00:00 GMT+0000
uint256 constant DEFAULT_DRIP_RATE_PER_DAY = 1e16; // 1% per day
uint256 constant DEFAULT_DRIP_BOOST_RATE_PER_DAY = 1e16; // 1% per day
uint256 constant DAY = 1 days;
uint256 constant TZ_OFFSET = 16 hours; // UTC-8
address public reserveToken;
address public boostToken;
uint256 public launchTime;
uint256 public dripRatePerDay;
uint256 public dripBoostRatePerDay;
bool public whitelistAll;
uint256 public totalStaked; // total staked balance
uint256 public totalBurned; // total burned balance
uint256 public totalDrip; // total drip pool balance
uint256 public allocDrip; // total drip pool balance allocated
uint256 public totalBoost; // total boost balance
uint256 public accDripPerShare; // cumulative drip pool per staked from PCS distribution algorithm
uint256 public accBoostPerShare; // cumulative boost per burned from PCS distribution algorithm
uint64 public day;
address[] public accountIndex;
mapping(address => AccountInfo) public accountInfo;
function accountIndexLength() external view returns (uint256 _length)
{
return accountIndex.length;
}
function getAccountByIndex(uint256 _index) external view returns (AccountInfo memory _accountInfo)
{
return accountInfo[accountIndex[_index]];
}
function today() public view returns (uint64 _today)
{
return uint64((block.timestamp + TZ_OFFSET) / DAY);
}
modifier hasLaunched()
{
require(block.timestamp >= launchTime, "unavailable");
_;
}
constructor(address _reserveToken, address _boostToken)
{
initialize(msg.sender, _reserveToken, _boostToken);
}
function initialize(address _owner, address _reserveToken, address _boostToken) public initializer
{
_transferOwnership(_owner);
launchTime = DEFAULT_LAUNCH_TIME;
dripRatePerDay = DEFAULT_DRIP_RATE_PER_DAY;
dripBoostRatePerDay = DEFAULT_DRIP_BOOST_RATE_PER_DAY;
whitelistAll = false;
totalStaked = 0;
totalBurned = 0;
totalDrip = 0;
allocDrip = 0;
totalBoost = 0;
accDripPerShare = 0;
accBoostPerShare = 0;
day = today();
reserveToken = _reserveToken;
boostToken = _boostToken;
}
// updates the launch time
function setLaunchTime(uint256 _launchTime) external onlyOwner
{
require(block.timestamp < launchTime, "unavailable");
require(_launchTime >= block.timestamp, "invalid time");
launchTime = _launchTime;
}
// updates the percentual rate of distribution from the drip pool
function setDripRatePerDay(uint256 _dripRatePerDay) external onlyOwner
{
require(_dripRatePerDay + dripBoostRatePerDay <= 100e16, "invalid rate");
dripRatePerDay = _dripRatePerDay;
}
// updates the percentual rate of distribution from the drip pool
function setDripBoostRatePerDay(uint256 _dripBoostRatePerDay) external onlyOwner
{
require(dripRatePerDay + _dripBoostRatePerDay <= 100e16, "invalid rate");
dripBoostRatePerDay = _dripBoostRatePerDay;
}
// flags all accounts for withdrawing without penalty (useful for migration)
function updateWhitelistAll(bool _whitelistAll) external onlyOwner
{
whitelistAll = _whitelistAll;
}
// flags multiple accounts for withdrawing without penalty
function updateWhitelist(address[] calldata _accounts, bool _whitelisted) external onlyOwner
{
for (uint256 _i; _i < _accounts.length; _i++) {
accountInfo[_accounts[_i]].whitelisted = _whitelisted;
}
}
// this is a safety net method for recovering funds that are not being used
function recoverFunds(address _token) external onlyOwner nonReentrant
{
uint256 _amount = IERC20(_token).balanceOf(address(this));
if (_token == reserveToken) _amount -= totalStaked + totalDrip + totalBoost;
require(_amount > 0, "no balance");
IERC20(_token).safeTransfer(msg.sender, _amount);
}
// burns
function burn(uint256 _amount) external
{
burnOnBehalfOf(_amount, msg.sender);
}
// burns on behalf of another account
function burnOnBehalfOf(uint256 _amount, address _account) public hasLaunched nonReentrant
{
require(_amount > 0, "invalid amount");
_updateDay();
_updateAccount(_account, 0, _amount);
totalBurned += _amount;
IERC20(boostToken).safeTransferFrom(msg.sender, FURNACE, _amount);
emit Burn(_account, boostToken, _amount);
}
// stakes
function deposit(uint256 _amount) external hasLaunched nonReentrant
{
_deposit(msg.sender, _amount, msg.sender);
emit Deposit(msg.sender, reserveToken, _amount);
}
// stakes on behalf of another account
function depositOnBehalfOf(uint256 _amount, address _account) external hasLaunched nonReentrant
{
_deposit(msg.sender, _amount, _account);
emit Deposit(_account, reserveToken, _amount);
}
function _deposit(address _sender, uint256 _amount, address _account) internal
{
require(_amount > 0, "invalid amount");
_updateDay();
if (_sender != address(this)) {
uint256 _balance = IERC20(reserveToken).balanceOf(address(this));
IERC20(reserveToken).safeTransferFrom(_sender, address(this), _amount);
_amount = IERC20(reserveToken).balanceOf(address(this)) - _balance;
}
uint256 _1percent = _amount * 1e16 / 100e16;
uint256 _dripAmount = 9 * _1percent;
uint256 _netAmount = _amount - (11 * _1percent);
// 9% accounted for the drip pool
totalDrip += _dripAmount;
// 2% instant rewards (only 7% actually go to the drip pool)
if (totalStaked > 0) {
accDripPerShare += (2 * _1percent) * 1e36 / totalStaked;
allocDrip += 2 * _1percent;
}
// rewards users for burned
if (totalBurned > 0) {
accBoostPerShare += _1percent * 1e36 / totalBurned;
totalBoost += _1percent;
}
_updateAccount(_account, int256(_netAmount), 0);
totalStaked += _netAmount;
IERC20(reserveToken).safeTransfer(FURNACE, _1percent);
}
// unstakes
function withdraw(uint256 _amount) external nonReentrant
{
require(_amount > 0, "invalid amount");
AccountInfo storage _accountInfo = accountInfo[msg.sender];
uint256 _available = _accountInfo.amount;
require(_amount <= _available, "insufficient balance");
_updateDay();
_updateAccount(msg.sender, -int256(_amount), 0);
totalStaked -= _amount;
if (_accountInfo.whitelisted || whitelistAll) {
IERC20(reserveToken).safeTransfer(msg.sender, _amount);
} else {
uint256 _1percent = _amount * 1e16 / 100e16;
uint256 _dripAmount = 9 * _1percent;
uint256 _netAmount = _amount - (11 * _1percent);
// 9% accounted for the drip pool
totalDrip += _dripAmount;
// 2% instant rewards (only 7% actually go to the drip pool)
if (totalStaked > 0) {
accDripPerShare += (2 * _1percent) * 1e36 / totalStaked;
allocDrip += 2 * _1percent;
}
// rewards users for burned
if (totalBurned > 0) {
accBoostPerShare += _1percent * 1e36 / totalBurned;
totalBoost += _1percent;
}
IERC20(reserveToken).safeTransfer(FURNACE, _1percent);
IERC20(reserveToken).safeTransfer(msg.sender, _netAmount);
}
emit Withdraw(msg.sender, reserveToken, _amount);
}
// claims
function claimReserve() external nonReentrant returns (uint256 _dripAmount, uint256 _boostAmount)
{
_updateDay();
_updateAccount(msg.sender, 0, 0);
AccountInfo storage _accountInfo = accountInfo[msg.sender];
_dripAmount = _accountInfo.drip;
_boostAmount = _accountInfo.boost;
if (_dripAmount > 0) {
_accountInfo.drip = 0;
totalDrip -= _dripAmount;
allocDrip -= _dripAmount;
}
if (_boostAmount > 0) {
_accountInfo.boost = 0;
totalBoost -= _boostAmount;
}
uint256 _dripPlusBoostAmount = _dripAmount + _boostAmount;
if (_dripPlusBoostAmount > 0) {
IERC20(reserveToken).safeTransfer(msg.sender, _dripPlusBoostAmount);
}
emit Claim(msg.sender, reserveToken, _dripAmount);
emit Claim(msg.sender, reserveToken, _boostAmount);
return (_dripAmount, _boostAmount);
}
// compounds
function compoundReserve() external nonReentrant returns (uint256 _dripAmount, uint256 _boostAmount)
{
_updateDay();
_updateAccount(msg.sender, 0, 0);
AccountInfo storage _accountInfo = accountInfo[msg.sender];
_dripAmount = _accountInfo.drip;
_boostAmount = _accountInfo.boost;
if (_dripAmount > 0) {
_accountInfo.drip = 0;
totalDrip -= _dripAmount;
allocDrip -= _dripAmount;
}
if (_boostAmount > 0) {
_accountInfo.boost = 0;
totalBoost -= _boostAmount;
}
uint256 _dripPlusBoostAmount = _dripAmount + _boostAmount;
if (_dripPlusBoostAmount > 0) {
_deposit(address(this), _dripPlusBoostAmount, msg.sender);
}
emit Compound(msg.sender, reserveToken, _dripAmount);
emit Compound(msg.sender, reserveToken, _boostAmount);
return (_dripAmount, _boostAmount);
}
// sends to the drip pool
function donateDrip(uint256 _amount) external nonReentrant
{
require(_amount > 0, "invalid amount");
_updateDay();
{
uint256 _balance = IERC20(reserveToken).balanceOf(address(this));
IERC20(reserveToken).safeTransferFrom(msg.sender, address(this), _amount);
_amount = IERC20(reserveToken).balanceOf(address(this)) - _balance;
}
totalDrip += _amount;
emit DonateDrip(msg.sender, reserveToken, _amount);
}
// performs the daily distribution from the drip pool
function updateDay() external nonReentrant
{
_updateDay();
}
function _updateDay() internal
{
uint64 _today = today();
if (day == _today) return;
uint256 _ratePerDay = dripRatePerDay + dripBoostRatePerDay;
if (_ratePerDay > 0) {
// calculates the percentage of the drip pool and distributes
{
// formula: drip_reward = drip_pool_balance * (1 - (1 - drip_rate_per_day) ^ days_ellapsed)
uint64 _days = _today - day;
uint256 _rate = 100e16 - _exp(100e16 - _ratePerDay, _days);
uint256 _amount = (totalDrip - allocDrip) * _rate / 100e16;
uint256 _amountDrip = _amount * dripRatePerDay / _ratePerDay;
if (totalStaked > 0) {
accDripPerShare += _amountDrip * 1e36 / totalStaked;
allocDrip += _amountDrip;
}
uint256 _amountBoost = _amount - _amountDrip;
if (totalBurned > 0) {
accBoostPerShare += _amountBoost * 1e36 / totalBurned;
totalDrip -= _amountBoost;
totalBoost += _amountBoost;
}
}
}
day = _today;
}
// updates the account balances while accumulating reward/drip/boost using PCS distribution algorithm
function _updateAccount(address _account, int256 _amount, uint256 _burned) internal
{
AccountInfo storage _accountInfo = accountInfo[_account];
if (!_accountInfo.exists) {
// adds account to index
_accountInfo.exists = true;
accountIndex.push(_account);
}
_accountInfo.drip += _accountInfo.amount * accDripPerShare / 1e36 - _accountInfo.accDripDebt;
_accountInfo.boost += _accountInfo.burned * accBoostPerShare / 1e36 - _accountInfo.accBoostDebt;
if (_amount > 0) {
_accountInfo.amount += uint256(_amount);
}
else
if (_amount < 0) {
_accountInfo.amount -= uint256(-_amount);
}
_accountInfo.burned += _burned;
_accountInfo.accDripDebt = _accountInfo.amount * accDripPerShare / 1e36;
_accountInfo.accBoostDebt = _accountInfo.burned * accBoostPerShare / 1e36;
}
// exponentiation with integer exponent
function _exp(uint256 _x, uint256 _n) internal pure returns (uint256 _y)
{
_y = 1e18;
while (_n > 0) {
if (_n & 1 != 0) _y = _y * _x / 1e18;
_n >>= 1;
_x = _x * _x / 1e18;
}
return _y;
}
event Burn(address indexed _account, address indexed _boostToken, uint256 _amount);
event Deposit(address indexed _account, address indexed _reserveToken, uint256 _amount);
event Withdraw(address indexed _account, address indexed _reserveToken, uint256 _amount);
event Claim(address indexed _account, address indexed _reserveToken, uint256 _amount);
event Compound(address indexed _account, address indexed _reserveToken, uint256 _amount);
event DonateDrip(address indexed _account, address indexed _reserveToken, uint256 _amount);
}