// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @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
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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://consensys.net/diligence/blog/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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or 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 {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* The default value of {decimals} is 18. To change this, you should override
* this function so it returns a different value.
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the default value returned by this function, unless
* it's overridden.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(address from, address to, uint256 amount) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
// decrementing then incrementing.
_balances[to] += amount;
}
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
unchecked {
// Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
_balances[account] += amount;
}
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
// Overflow not possible: amount <= accountBalance <= totalSupply.
_totalSupply -= amount;
}
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {Ownable} from '@openzeppelin/contracts/access/Ownable.sol';
import {CannotSetNullAddress} from '@floor/utils/Errors.sol';
import {IEpochManager} from '@floor-interfaces/EpochManager.sol';
abstract contract EpochManaged is Ownable {
/// Emits when {EpochManager} is updated
event EpochManagerUpdated(address epochManager);
/// Stores the current {EpochManager} contract
IEpochManager public epochManager;
/**
* Allows an updated {EpochManager} address to be set.
*/
function setEpochManager(address _epochManager) external virtual onlyOwner {
_setEpochManager(_epochManager);
}
/**
* Allows an updated {EpochManager} address to be set by an inheriting contract.
*/
function _setEpochManager(address _epochManager) internal virtual {
if (_epochManager == address(0)) revert CannotSetNullAddress();
epochManager = IEpochManager(_epochManager);
emit EpochManagerUpdated(_epochManager);
}
/**
* Gets the current epoch from our {EpochManager}.
*/
function currentEpoch() internal view virtual returns (uint) {
return epochManager.currentEpoch();
}
/**
* Checks that the contract caller is the {EpochManager}.
*/
modifier onlyEpochManager() {
require(msg.sender == address(epochManager), 'Only EpochManager can call');
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* Handles epoch management for all other contracts.
*/
interface IEpochManager {
/// Emitted when an epoch is ended
event EpochEnded(uint epoch, uint timestamp);
/// Emitted when a new collection war is scheduled
event CollectionAdditionWarScheduled(uint epoch, uint index);
/// Emitted when required contracts are updated
event EpochManagerContractsUpdated(address newCollectionWars, address voteMarket);
/**
* The current epoch that is running across the codebase.
*
* @return The current epoch
*/
function currentEpoch() external view returns (uint);
/**
* Stores a mapping of an epoch to a collection addition war index.
*
* @param _epoch Epoch to check
*
* @return Index of the collection addition war. Will return 0 if none found
*/
function collectionEpochs(uint _epoch) external view returns (uint);
/**
* Will return if the current epoch is a collection addition vote.
*
* @return If the current epoch is a collection addition
*/
function isCollectionAdditionEpoch() external view returns (bool);
/**
* Will return if the specified epoch is a collection addition vote.
*
* @param epoch The epoch to check
*
* @return If the specified epoch is a collection addition
*/
function isCollectionAdditionEpoch(uint epoch) external view returns (bool);
/**
* Allows an epoch to be scheduled to be a collection addition vote. An index will
* be specified to show which collection addition will be used. The index will not
* be a zero value.
*
* @param epoch The epoch that the Collection Addition will take place in
* @param index The Collection Addition array index
*/
function scheduleCollectionAdditionEpoch(uint epoch, uint index) external;
/**
* Triggers an epoch to end.
*
* @dev More information about this function can be found in the actual contract
*/
function endEpoch() external;
/**
* Provides an estimated timestamp of when an epoch started, and also the earliest
* that an epoch in the future could start.
*
* @param _epoch The epoch to find the estimated timestamp of
*
* @return The estimated timestamp of when the specified epoch started
*/
function epochIterationTimestamp(uint _epoch) external returns (uint);
/**
* The length of an epoch in seconds.
*
* @return The length of the epoch in seconds
*/
function EPOCH_LENGTH() external returns (uint);
/**
* Sets contracts that the epoch manager relies on. This doesn't have to include
* all of the contracts that are {EpochManaged}, but only needs to set ones that the
* {EpochManager} needs to interact with.
*/
function setContracts(address _newCollectionWars, address _voteMarket) external;
}
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
/**
* A collection of generic errors that can be referenced across multiple
* contracts. Contract-specific errors should still be stored in their
* individual Solidity files.
*/
/// If a NULL address tries to be stored which should not be accepted
error CannotSetNullAddress();
/// If the caller has entered an insufficient amount to process the action. This
/// will likely be a zero amount.
error InsufficientAmount();
/// If the caller enters a percentage value that is too high for the requirements
error PercentageTooHigh(uint amount);
/// If a required ETH or token `transfer` call fails
error TransferFailed();
/// If a user calls a deposit related function with a zero amount
error CannotDepositZeroAmount();
/// If a user calls a withdrawal related function with a zero amount
error CannotWithdrawZeroAmount();
/// If there are no rewards available to be claimed
error NoRewardsAvailableToClaim();
/// If the requested collection is not approved
/// @param collection Address of the collection requested
error CollectionNotApproved(address collection);
/// If the requested strategy implementation is not approved
/// @param strategyImplementation Address of the strategy implementation requested
error StrategyNotApproved(address strategyImplementation);
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v1;
interface IDaiLikePermit {
function permit(
address holder,
address spender,
uint256 nonce,
uint256 expiry,
bool allowed,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IPermit2 {
struct PermitDetails {
// ERC20 token address
address token;
// the maximum amount allowed to spend
uint160 amount;
// timestamp at which a spender's token allowances become invalid
uint48 expiration;
// an incrementing value indexed per owner,token,and spender for each signature
uint48 nonce;
}
/// @notice The permit message signed for a single token allownce
struct PermitSingle {
// the permit data for a single token alownce
PermitDetails details;
// address permissioned on the allowed tokens
address spender;
// deadline on the permit signature
uint256 sigDeadline;
}
/// @notice Packed allowance
struct PackedAllowance {
// amount allowed
uint160 amount;
// permission expiry
uint48 expiration;
// an incrementing value indexed per owner,token,and spender for each signature
uint48 nonce;
}
function transferFrom(address user, address spender, uint160 amount, address token) external;
function permit(address owner, PermitSingle memory permitSingle, bytes calldata signature) external;
function allowance(address user, address token, address spender) external view returns (PackedAllowance memory);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface INewCollectionWars {
/**
* For each FloorWar that is created, this structure will be created. When
* the epoch ends, the FloorWar will remain and will be updated with information
* on the winning collection and the votes attributed to each collection.
*/
struct FloorWar {
uint index;
uint startEpoch;
address[] collections;
}
/// Sent when a user casts a vote
event VoteCast(address sender, address collection, uint userVotes, uint collectionVotes);
/// Sent when a collection vote is revoked
event VoteRevoked(address sender, address collection, uint collectionVotes);
/// Sent when a collection NFT is staked to vote
event NftVoteCast(address sender, uint war, address collection, uint collectionVotes, uint collectionNftVotes);
/// Sent when a Collection Addition War is created
event CollectionAdditionWarCreated(uint epoch, address[] collections, uint[] floorPrices);
/// Sent when a Collection Addition War is started
event CollectionAdditionWarStarted(uint warIndex);
/// Sent when a Collection Addition War ends
event CollectionAdditionWarEnded(uint warIndex, address collection);
/// Sent when Collection Addition War NFTs are exercised
event CollectionExercised(uint warIndex, address collection, uint value);
/// Sent when the {NewCollectionWarOptions} contract address is updated
event NewCollectionWarOptionsUpdated(address newCollectionWarOptions);
/// Stores the number of votes a user has placed against a war collection
function userVotes(bytes32) external view returns (uint);
/// Stores the floor spot price of a collection token against a war collection
function collectionSpotPrice(bytes32) external view returns (uint);
/// Stores the total number of votes against a war collection
function collectionVotes(bytes32) external view returns (uint);
function collectionNftVotes(bytes32) external view returns (uint);
/// Stores which collection the user has cast their votes towards to allow for
/// reallocation on subsequent votes if needed.
function userCollectionVote(bytes32) external view returns (address);
/// Stores the address of the collection that won a Floor War
function floorWarWinner(uint _epoch) external view returns (address);
/// Stores if a collection has been flagged as ERC1155
function is1155(address) external returns (bool);
/// Stores the unlock epoch of a collection in a floor war
function collectionEpochLock(bytes32) external returns (uint);
/**
* The total voting power of a user, regardless of if they have cast votes
* or not.
*
* @param _user User address being checked
*/
function userVotingPower(address _user) external view returns (uint);
/**
* The total number of votes that a user has available.
*
* @param _user User address being checked
*
* @return uint Number of votes available to the user
*/
function userVotesAvailable(uint _war, address _user) external view returns (uint);
/**
* Allows the user to cast 100% of their voting power against an individual
* collection. If the user has already voted on the FloorWar then this will
* additionally reallocate their votes.
*/
function vote(address collection) external;
/**
* Allows an approved contract to submit option-related votes against a collection
* in the current war.
*
* @param sender The address of the user that staked the token
* @param collection The collection to cast the vote against
* @param votingPower The voting power added from the option creation
*/
function optionVote(address sender, uint war, address collection, uint votingPower) external;
/**
* Revokes a user's current votes in the current war.
*
* @dev This is used when a user unstakes their floor
*
* @param account The address of the account that is having their vote revoked
*/
function revokeVotes(address account) external;
/**
* Allow an authorised user to create a new floor war to start with a range of
* collections from a specific epoch.
*/
function createFloorWar(uint epoch, address[] calldata collections, bool[] calldata isErc1155, uint[] calldata floorPrices)
external
returns (uint);
/**
* Sets a scheduled {FloorWar} to be active.
*
* @dev This function is called by the {EpochManager} when a new epoch starts
*
* @param index The index of the {FloorWar} being started
*/
function startFloorWar(uint index) external;
/**
* When the epoch has come to an end, this function will be called to finalise
* the votes and decide which collection has won. This collection will then need
* to be added to the {CollectionRegistry}.
*
* Any NFTs that have been staked will be timelocked for an additional epoch to
* give the DAO time to exercise or reject any options.
*
* @dev We can't action this in one single call as we will need information about
* the underlying NFTX token as well.
*/
function endFloorWar() external returns (address highestVoteCollection);
/**
* Allows us to update our collection floor prices if we have seen a noticable difference
* since the start of the epoch. This will need to be called for this reason as the floor
* price of the collection heavily determines the amount of voting power awarded when
* creating an option.
*/
function updateCollectionFloorPrice(address collection, uint floorPrice) external;
/**
* Allows our options contract to be updated.
*
* @param _contract The new contract to use
*/
function setOptionsContract(address _contract) external;
/**
* Check if a collection is in a FloorWar.
*/
function isCollectionInWar(bytes32 warCollection) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 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 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
pragma solidity ^0.8.0;
pragma abicoder v1;
/// @title Revert reason forwarder.
library RevertReasonForwarder {
/// @dev Forwards latest externall call revert.
function reRevert() internal pure {
// bubble up revert reason from latest external call
/// @solidity memory-safe-assembly
assembly { // solhint-disable-line no-inline-assembly
let ptr := mload(0x40)
returndatacopy(ptr, 0, returndatasize())
revert(ptr, returndatasize())
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v1;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol";
import "../interfaces/IDaiLikePermit.sol";
import "../interfaces/IPermit2.sol";
import "../libraries/RevertReasonForwarder.sol";
/// @title Implements efficient safe methods for ERC20 interface.
library SafeERC20 {
error SafeTransferFailed();
error SafeTransferFromFailed();
error ForceApproveFailed();
error SafeIncreaseAllowanceFailed();
error SafeDecreaseAllowanceFailed();
error SafePermitBadLength();
address private constant _PERMIT2 = 0x000000000022D473030F116dDEE9F6B43aC78BA3;
bytes4 private constant _PERMIT_LENGHT_ERROR = 0x68275857; // SafePermitBadLength.selector
/// @dev Ensures method do not revert or return boolean `true`, admits call to non-smart-contract.
function safeTransferFromUniversal(
IERC20 token,
address from,
address to,
uint256 amount,
bool permit2
) internal {
if (permit2) {
safeTransferFromPermit2(token, from, to, amount);
} else {
safeTransferFrom(token, from, to, amount);
}
}
/// @dev Ensures method do not revert or return boolean `true`, admits call to non-smart-contract.
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 amount
) internal {
bytes4 selector = token.transferFrom.selector;
bool success;
/// @solidity memory-safe-assembly
assembly { // solhint-disable-line no-inline-assembly
let data := mload(0x40)
mstore(data, selector)
mstore(add(data, 0x04), from)
mstore(add(data, 0x24), to)
mstore(add(data, 0x44), amount)
success := call(gas(), token, 0, data, 100, 0x0, 0x20)
if success {
switch returndatasize()
case 0 {
success := gt(extcodesize(token), 0)
}
default {
success := and(gt(returndatasize(), 31), eq(mload(0), 1))
}
}
}
if (!success) revert SafeTransferFromFailed();
}
/// @dev Permit2 version of safeTransferFrom above.
function safeTransferFromPermit2(
IERC20 token,
address from,
address to,
uint256 amount
) internal {
bytes4 selector = IPermit2.transferFrom.selector;
bool success;
/// @solidity memory-safe-assembly
assembly { // solhint-disable-line no-inline-assembly
let data := mload(0x40)
mstore(data, selector)
mstore(add(data, 0x04), from)
mstore(add(data, 0x24), to)
mstore(add(data, 0x44), amount)
mstore(add(data, 0x64), token)
success := call(gas(), _PERMIT2, 0, data, 0x84, 0x0, 0x20)
if success {
switch returndatasize()
case 0 {
success := gt(extcodesize(token), 0)
}
default {
success := and(gt(returndatasize(), 31), eq(mload(0), 1))
}
}
}
if (!success) revert SafeTransferFromFailed();
}
/// @dev Ensures method do not revert or return boolean `true`, admits call to non-smart-contract.
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
if (!_makeCall(token, token.transfer.selector, to, value)) {
revert SafeTransferFailed();
}
}
/// @dev If `approve(from, to, amount)` fails, try to `approve(from, to, 0)` before retry.
function forceApprove(
IERC20 token,
address spender,
uint256 value
) internal {
if (!_makeCall(token, token.approve.selector, spender, value)) {
if (
!_makeCall(token, token.approve.selector, spender, 0) ||
!_makeCall(token, token.approve.selector, spender, value)
) {
revert ForceApproveFailed();
}
}
}
/// @dev Allowance increase with safe math check.
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 allowance = token.allowance(address(this), spender);
if (value > type(uint256).max - allowance) revert SafeIncreaseAllowanceFailed();
forceApprove(token, spender, allowance + value);
}
/// @dev Allowance decrease with safe math check.
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 allowance = token.allowance(address(this), spender);
if (value > allowance) revert SafeDecreaseAllowanceFailed();
forceApprove(token, spender, allowance - value);
}
function safePermit(IERC20 token, bytes calldata permit) internal {
if (!tryPermit(token, msg.sender, address(this), permit)) RevertReasonForwarder.reRevert();
}
function safePermit(IERC20 token, address owner, address spender, bytes calldata permit) internal {
if (!tryPermit(token, owner, spender, permit)) RevertReasonForwarder.reRevert();
}
function tryPermit(IERC20 token, bytes calldata permit) internal returns(bool success) {
return tryPermit(token, msg.sender, address(this), permit);
}
function tryPermit(IERC20 token, address owner, address spender, bytes calldata permit) internal returns(bool success) {
bytes4 permitSelector = IERC20Permit.permit.selector;
bytes4 daiPermitSelector = IDaiLikePermit.permit.selector;
bytes4 permit2Selector = IPermit2.permit.selector;
/// @solidity memory-safe-assembly
assembly { // solhint-disable-line no-inline-assembly
let ptr := mload(0x40)
switch permit.length
case 100 {
mstore(ptr, permitSelector)
mstore(add(ptr, 0x04), owner)
mstore(add(ptr, 0x24), spender)
// Compact IERC20Permit.permit(uint256 value, uint32 deadline, uint256 r, uint256 vs)
{ // stack too deep
let deadline := shr(224, calldataload(add(permit.offset, 0x20)))
let vs := calldataload(add(permit.offset, 0x44))
calldatacopy(add(ptr, 0x44), permit.offset, 0x20) // value
mstore(add(ptr, 0x64), sub(deadline, 1))
mstore(add(ptr, 0x84), add(27, shr(255, vs)))
calldatacopy(add(ptr, 0xa4), add(permit.offset, 0x24), 0x20) // r
mstore(add(ptr, 0xc4), shr(1, shl(1, vs)))
}
// IERC20Permit.permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s)
success := call(gas(), token, 0, ptr, 0xe4, 0, 0)
}
case 72 {
mstore(ptr, daiPermitSelector)
mstore(add(ptr, 0x04), owner)
mstore(add(ptr, 0x24), spender)
// Compact IDaiLikePermit.permit(uint32 nonce, uint32 expiry, uint256 r, uint256 vs)
{ // stack too deep
let nonce := shr(224, calldataload(permit.offset))
let expiry := shr(224, calldataload(add(permit.offset, 0x04)))
let vs := calldataload(add(permit.offset, 0x28))
mstore(add(ptr, 0x44), nonce)
mstore(add(ptr, 0x64), sub(expiry, 1))
mstore(add(ptr, 0x84), true)
mstore(add(ptr, 0xa4), add(27, shr(255, vs)))
calldatacopy(add(ptr, 0xc4), add(permit.offset, 0x08), 0x20) // r
mstore(add(ptr, 0xe4), shr(1, shl(1, vs)))
}
// IDaiLikePermit.permit(address holder, address spender, uint256 nonce, uint256 expiry, bool allowed, uint8 v, bytes32 r, bytes32 s)
success := call(gas(), token, 0, ptr, 0x104, 0, 0)
}
case 224 {
mstore(ptr, permitSelector)
calldatacopy(add(ptr, 0x04), permit.offset, permit.length)
// IERC20Permit.permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s)
success := call(gas(), token, 0, ptr, add(4, permit.length), 0, 0)
}
case 256 {
mstore(ptr, daiPermitSelector)
calldatacopy(add(ptr, 0x04), permit.offset, permit.length)
// IDaiLikePermit.permit(address holder, address spender, uint256 nonce, uint256 expiry, bool allowed, uint8 v, bytes32 r, bytes32 s)
success := call(gas(), token, 0, ptr, add(4, permit.length), 0, 0)
}
case 384 {
mstore(ptr, permit2Selector)
calldatacopy(add(ptr, 0x04), permit.offset, permit.length)
success := call(gas(), _PERMIT2, 0, ptr, add(4, permit.length), 0, 0)
}
// TODO: add case for compact permit2
default {
mstore(ptr, _PERMIT_LENGHT_ERROR)
revert(ptr, 4)
}
}
}
function _makeCall(
IERC20 token,
bytes4 selector,
address to,
uint256 amount
) private returns (bool success) {
/// @solidity memory-safe-assembly
assembly { // solhint-disable-line no-inline-assembly
let data := mload(0x40)
mstore(data, selector)
mstore(add(data, 0x04), to)
mstore(add(data, 0x24), amount)
success := call(gas(), token, 0, data, 0x44, 0x0, 0x20)
if success {
switch returndatasize()
case 0 {
success := gt(extcodesize(token), 0)
}
default {
success := and(gt(returndatasize(), 31), eq(mload(0), 1))
}
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* The GWV will allow users to assign their veFloor position to a strategy, or
* optionally case it to a veFloor, which will use a constant value. As the
* strategies will be rendered as an address, the veFloor vote will take a NULL
* address value.
*
* At point of development this can take influence from:
* https://github.com/saddle-finance/saddle-contract/blob/master/contracts/tokenomics/gauges/GaugeController.vy
*/
interface ISweepWars {
/// Sent when a user casts or revokes their vote
event VoteCast(address sender, address collection, int amount);
/// Sent when a user has revoked their vote, or it is revoked on their behalf
event VotesRevoked(address account, address collection, uint forVotesRevoked, uint againstVotesRevoked);
/// Sent when the Sample Size is updated
event SampleSizeUpdated(uint size);
/// Sent when the {NftStaking} contract address is updated
event NftStakingUpdated(address nftStaking);
/**
* Gets the number of votes for a collection at the current epoch.
*/
function votes(address) external view returns (int);
/**
* The total voting power of a user, regardless of if they have cast votes
* or not.
*/
function userVotingPower(address _user) external view returns (uint);
/**
* The total number of votes that a user has available, calculated by:
*
* ```
* votesAvailable_ = balanceOf(_user) - SUM(userVotes.votes_)
* ```
*/
function userVotesAvailable(address _user) external view returns (uint votesAvailable_);
/**
* Provides a list of collection addresses that can be voted on.
*/
function voteOptions() external view returns (address[] memory collections_);
/**
* Allows a user to cast a vote using their veFloor allocation. We don't
* need to monitor transfers as veFloor can only be minted or burned, and
* we check the voters balance during the `snapshot` call.
*
* A user can vote with a partial amount of their veFloor holdings, and when
* it comes to calculating their voting power this will need to be taken into
* consideration that it will be:
*
* ```
* staked balance + (gains from staking * (total balance - staked balance)%)
* ```
*
* The {Treasury} cannot vote with it's holdings, as it shouldn't be holding
* any staked Floor.
*/
function vote(address _collection, int _amount) external;
/**
* Allows a user to revoke their votes from strategies. This will free up the
* user's available votes that can subsequently be voted again with.
*/
function revokeVotes(address[] memory _collection) external;
/**
* Allows an authorised contract or wallet to revoke all user votes. This
* can be called when the veFLOOR balance is reduced.
*/
function revokeAllUserVotes(address _account) external;
/**
* The snapshot function will need to iterate over all strategies that have
* more than 0 votes against them. With that we will need to find each
* strategy percentage share in relation to other strategies.
*
* This percentage share will instruct the {Treasury} on how much additional
* FLOOR to allocate to the users staked in the strategies. These rewards will
* become available in the {RewardLedger}.
*
* +----------------+-----------------+-------------------+-------------------+
* | Voter | veFloor | Vote Weight | Strategy |
* +----------------+-----------------+-------------------+-------------------+
* | Alice | 30 | 40 | 1 |
* | Bob | 20 | 30 | 2 |
* | Carol | 40 | 55 | 3 |
* | Dave | 20 | 40 | 2 |
* | Emily | 25 | 35 | 0 |
* +----------------+-----------------+-------------------+-------------------+
*
* With the above information, and assuming that the {Treasury} has allocated
* 1000 FLOOR tokens to be additionally distributed in this snapshot, we would
* have the following allocations going to the strategies.
*
* +----------------+-----------------+-------------------+-------------------+
* | Strategy | Votes Total | Vote Percent | veFloor Rewards |
* +----------------+-----------------+-------------------+-------------------+
* | 0 (veFloor) | 35 | 17.5% | 175 |
* | 1 | 40 | 20% | 200 |
* | 2 | 70 | 35% | 350 |
* | 3 | 55 | 27.5% | 275 |
* | 4 | 0 | 0% | 0 |
* +----------------+-----------------+-------------------+-------------------+
*
* This would distribute the strategies allocated rewards against the staked
* percentage in the strategy. Any Treasury holdings that would be given in rewards
* are just deposited into the {Treasury} as FLOOR, bypassing the {RewardsLedger}.
*/
function snapshot(uint tokens) external returns (address[] memory collections, uint[] memory amounts);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {IWETH} from '@floor-interfaces/tokens/WETH.sol';
library TreasuryEnums {
/// Different sweep types that can be specified.
enum SweepType {
COLLECTION_ADDITION,
SWEEP
}
/// Different approval types that can be specified.
enum ApprovalType {
NATIVE,
ERC20,
ERC721,
ERC1155
}
}
/**
* @dev The Treasury will hold all assets.
*/
interface ITreasury {
/// Stores data that allows the Treasury to action a sweep.
struct Sweep {
TreasuryEnums.SweepType sweepType;
address[] collections;
uint[] amounts;
bool completed;
string message;
}
/// The data structure format that will be mapped against to define a token
/// approval request.
struct ActionApproval {
TreasuryEnums.ApprovalType _type; // Token type
address assetContract; // Used by 20, 721 and 1155
address target; // Used by 20, 721 and 1155
uint amount; // Used by native and 20 tokens
}
/// @dev When native network token is withdrawn from the Treasury
event Deposit(uint amount);
/// @dev When an ERC20 is depositted into the Treasury
event DepositERC20(address token, uint amount);
/// @dev When an ERC721 is depositted into the Treasury
event DepositERC721(address token, uint tokenId);
/// @dev When an ERC1155 is depositted into the Treasury
event DepositERC1155(address token, uint tokenId, uint amount);
/// @dev When native network token is withdrawn from the Treasury
event Withdraw(uint amount, address recipient);
/// @dev When an ERC20 token is withdrawn from the Treasury
event WithdrawERC20(address token, uint amount, address recipient);
/// @dev When an ERC721 token is withdrawn from the Treasury
event WithdrawERC721(address token, uint tokenId, address recipient);
/// @dev When an ERC1155 is withdrawn from the Treasury
event WithdrawERC1155(address token, uint tokenId, uint amount, address recipient);
/// @dev When FLOOR is minted
event FloorMinted(uint amount);
/// @dev When a {Treasury} action is processed
event ActionProcessed(address action, bytes data);
/// @dev When a sweep is registered against an epoch
event SweepRegistered(uint sweepEpoch, TreasuryEnums.SweepType sweepType, address[] collections, uint[] amounts);
/// @dev When an action is assigned to a sweep epoch
event SweepAction(uint sweepEpoch);
/// @dev When an epoch is swept
event EpochSwept(uint epochIndex);
/// Emitted when the {MercenarySweeper} contract address is updated
event MercenarySweeperUpdated(address mercSweeper);
/// Emitted when the minimum sweep amount is updated
event MinSweepAmountUpdated(uint minSweepAmount);
/// Emitted when the {VeFloorStaking} contract is updated
event VeFloorStakingUpdated(address veFloorStaking);
/// Emitted when the {StrategyFactory} contract is updated
event StrategyFactoryUpdated(address strategyFactory);
/**
* Our stored WETH address for the {Treasury}
*/
function weth() external returns (IWETH);
/**
* Allow FLOOR token to be minted. This should be called from the deposit method
* internally, but a public method will allow a {TreasuryManager} to bypass this
* and create additional FLOOR tokens if needed.
*
* @dev We only want to do this on creation and for inflation. Have a think on how
* we can implement this!
*/
function mint(uint amount) external;
/**
* Allows an ERC20 token to be deposited and generates FLOOR tokens based on
* the current determined value of FLOOR and the token.
*/
function depositERC20(address token, uint amount) external;
/**
* Allows an ERC721 token to be deposited and generates FLOOR tokens based on
* the current determined value of FLOOR and the token.
*/
function depositERC721(address token, uint tokenId) external;
/**
* Allows an ERC1155 token(s) to be deposited and generates FLOOR tokens based on
* the current determined value of FLOOR and the token.
*/
function depositERC1155(address token, uint tokenId, uint amount) external;
/**
* Allows an approved user to withdraw native token.
*/
function withdraw(address recipient, uint amount) external;
/**
* Allows an approved user to withdraw and ERC20 token from the Treasury.
*/
function withdrawERC20(address recipient, address token, uint amount) external;
/**
* Allows an approved user to withdraw and ERC721 token from the Treasury.
*/
function withdrawERC721(address recipient, address token, uint tokenId) external;
/**
* Allows an approved user to withdraw an ERC1155 token(s) from the Treasury.
*/
function withdrawERC1155(address recipient, address token, uint tokenId, uint amount) external;
/**
* Actions a sweep to be used against a contract that implements {ISweeper}. This
* will fulfill the sweep and we then mark the sweep as completed.
*/
function sweepEpoch(uint epochIndex, address sweeper, bytes calldata data, uint mercSweep) external;
/**
* Allows the DAO to resweep an already swept "Sweep" struct, using a contract that
* implements {ISweeper}. This will fulfill the sweep again and keep the sweep marked
* as completed.
*/
function resweepEpoch(uint epochIndex, address sweeper, bytes calldata data, uint mercSweep) external;
/**
* When an epoch ends, we have the ability to register a sweep against the {Treasury}
* via an approved contract. This will store a DAO sweep that will need to be actioned
* using the `sweepEpoch` function.
*/
function registerSweep(uint epoch, address[] calldata collections, uint[] calldata amounts, TreasuryEnums.SweepType sweepType)
external;
/**
* The minimum sweep amount that can be implemented, or excluded, as desired by the DAO.
*/
function minSweepAmount() external returns (uint);
/**
* Allows the mercenary sweeper contract to be updated.
*/
function setMercenarySweeper(address _mercSweeper) external;
/**
* Allows us to set a new VeFloorStaking contract that is used when sweeping epochs.
*/
function setVeFloorStaking(address _veFloorStaking) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
struct Depositor {
uint160 epochStart;
uint8 epochCount;
uint88 amount;
}
interface IVeFloorStaking {
/// Set a list of locking periods that the user can lock for
function LOCK_PERIODS(uint) external returns (uint8);
// function floor() external returns (IERC20);
function earlyWithdrawFeeExemptions(address) external returns (bool);
function depositors(address) external returns (uint160, uint8, uint88);
function totalDeposits() external returns (uint);
function emergencyExit() external returns (bool);
function maxLossRatio() external returns (uint);
function minLockPeriodRatio() external returns (uint);
function feeReceiver() external returns (address);
function setFeeReceiver(address feeReceiver_) external;
function setMaxLossRatio(uint maxLossRatio_) external;
function setMinLockPeriodRatio(uint minLockPeriodRatio_) external;
function setEmergencyExit(bool emergencyExit_) external;
function deposit(uint amount, uint epochs) external;
function earlyWithdraw(uint minReturn, uint maxLoss) external;
function earlyWithdrawTo(address to, uint minReturn, uint maxLoss) external;
function earlyWithdrawLoss(address account) external view returns (uint loss, uint ret, bool canWithdraw);
function withdraw() external;
function withdrawTo(address to) external;
// function rescueFunds(IERC20 token, uint256 amount) external;
function isExemptFromEarlyWithdrawFees(address account) external view returns (bool);
function addEarlyWithdrawFeeExemption(address account, bool exempt) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
interface IVotable is IERC20 {
/// @dev we assume that voting power is a function of balance that preserves order
function votingPowerOf(address account) external view returns (uint);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
interface IWETH is IERC20 {
function allowance(address, address) external view returns (uint);
function balanceOf(address) external view returns (uint);
function approve(address, uint) external returns (bool);
function transfer(address, uint) external returns (bool);
function transferFrom(address, address, uint) external returns (bool);
function deposit() external payable;
function withdraw(uint) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
// EIP-2612 is Final as of 2022-11-01. This file is deprecated.
import "./IERC20Permit.sol";
{
"compilationTarget": {
"src/contracts/staking/VeFloorStaking.sol": "VeFloorStaking"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "none"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": [
":@1inch/=lib/",
":@ERC721A/=lib/ERC721A/contracts/",
":@chainlink/=lib/chainlink/",
":@charmfi/=lib/charmfi-contracts-0.8.0-support/",
":@floor-interfaces/=src/interfaces/",
":@floor-scripts/=script/",
":@floor/=src/contracts/",
":@manifoldxyz/=lib/lssvm2/lib/",
":@mocks/=lib/nftx-protocol-v3/src/mocks/",
":@murky/=lib/murky/src/",
":@nftx-protocol-v3/=lib/nftx-protocol-v3/src/",
":@openzeppelin-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
":@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
":@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
":@permit2/=lib/nftx-protocol-v3/lib/permit2/src/",
":@prb/math/=lib/lssvm2/lib/prb-math/src/",
":@prb/test/=lib/foundry-random/lib/prb-test/src/",
":@solidity-math-utils/=lib/solidity-math-utils/project/contracts/",
":@solidity-trigonometry/=lib/solidity-trigonometry/src/",
":@src/=lib/nftx-protocol-v3/src/",
":@sudoswap/=lib/lssvm/src/",
":@test/=lib/nftx-protocol-v3/test/",
":@uni-core/=lib/nftx-protocol-v3/src/uniswap/v3-core/",
":@uni-periphery/=lib/nftx-protocol-v3/src/uniswap/v3-periphery/",
":@uniswap-v3/=lib/",
":@uniswap/lib/=lib/nftx-protocol-v3/lib/solidity-lib/",
":@uniswap/v2-core/=lib/nftx-protocol-v3/lib/v2-core/",
":@uniswap/v3-core/contracts/=lib/nftx-protocol-v3/src/uniswap/v3-core/",
":@uniswap/v3-periphery/=lib/v3-periphery/",
":CramBit/=lib/foundry-random/lib/CramBit/",
":ERC721A/=lib/ERC721A/contracts/",
":base64-sol/=lib/nftx-protocol-v3/src/uniswap/v3-periphery/libraries/",
":chainlink/=lib/chainlink/",
":charmfi-contracts-0.8.0-support/=lib/charmfi-contracts-0.8.0-support/",
":clones-with-immutable-args/=lib/lssvm2/lib/clones-with-immutable-args/src/",
":crambit/=lib/foundry-random/lib/CramBit/src/",
":create2-helpers/=lib/lssvm2/lib/royalty-registry-solidity/lib/create2-helpers/",
":create3-factory/=lib/lssvm2/lib/create3-factory/",
":ds-test/=lib/forge-std/lib/ds-test/src/",
":erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
":forge-std/=lib/forge-std/src/",
":foundry-huff/=lib/lssvm2/lib/foundry-huff/src/",
":foundry-random/=lib/foundry-random/src/",
":huffmate/=lib/lssvm2/lib/huffmate/src/",
":libraries-solidity/=lib/lssvm2/lib/libraries-solidity/contracts/",
":lssvm/=lib/lssvm/src/",
":lssvm2/=lib/lssvm2/src/",
":manifoldxyz/=lib/lssvm2/lib/royalty-registry-solidity/contracts/",
":murky/=lib/murky/src/",
":nftx-protocol-v3/=lib/nftx-protocol-v3/src/",
":openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
":openzeppelin-contracts/=lib/openzeppelin-contracts/",
":prb-math/=lib/solidity-trigonometry/lib/prb-math/contracts/",
":prb-test/=lib/foundry-random/lib/prb-test/src/",
":royalty-registry-solidity.git/=lib/lssvm/lib/royalty-registry-solidity.git/contracts/",
":royalty-registry-solidity/=lib/lssvm2/lib/royalty-registry-solidity/",
":solidity-bytes-utils/=lib/foundry-random/lib/solidity-bytes-utils/contracts/",
":solidity-math-utils/=lib/solidity-math-utils/",
":solidity-stringutils/=lib/lssvm2/lib/foundry-huff/lib/solidity-stringutils/",
":solidity-trigonometry/=lib/solidity-trigonometry/src/",
":solidity-utils/=lib/solidity-utils/contracts/",
":solmate/=lib/lssvm2/lib/solmate/src/",
":src/=lib/foundry-random/src/",
":stringutils/=lib/lssvm2/lib/foundry-huff/lib/solidity-stringutils/",
":v3-core/=lib/v3-core/contracts/",
":v3-periphery/=lib/v3-periphery/contracts/",
":weird-erc20/=lib/lssvm/lib/solmate/lib/weird-erc20/src/"
]
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