ERC-20
Overview
Max Total Supply
12,587.780548008 SUPER_CAH
Holders
3,180
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.872817955 SUPER_CAHValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Minimal Proxy Contract for 0xa8b5bab1707dbfe035905e9175b805c27d7fcdcd
Contract Name:
VestingToken
Compiler Version
v0.8.24+commit.e11b9ed9
Optimization Enabled:
Yes with 10000 runs
Other Settings:
paris EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: None // Unvest Contracts (last updated v3.1.0) (VestingToken.sol) pragma solidity ^0.8.24; import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import { ERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol"; import { ReentrancyGuardUpgradeable } from "@openzeppelin/contracts-upgradeable/utils/ReentrancyGuardUpgradeable.sol"; import { Errors } from "./libraries/Errors.sol"; import { Arrays } from "./libraries/Arrays.sol"; import { IFeeManager } from "./interfaces/IFeeManager.sol"; import { IVestingToken } from "./interfaces/IVestingToken.sol"; /* _ _ _ _ __ __ _____ ____ _____ | | | || \ | |\ \ / /| ____|/ ___||_ _| | | | || \| | \ \ / / | _| \___ \ | | | |_| || |\ | \ V / | |___ ___) | | | \___/ |_| \_| \_/ |_____||____/ |_| */ /// @title VestingToken /// @notice VestingToken locks ERC20 and contains the logic for tokens to be partially unlocked based on milestones. /// @author JA (@ubinatus) v3 /// @author Klaus Hott (@Janther) v2 contract VestingToken is ERC20Upgradeable, ReentrancyGuardUpgradeable, IVestingToken { using SafeERC20 for ERC20Upgradeable; /// @dev `claimedAmountAfterTransfer` is used to calculate the `_claimableAmount` of an account. It's value is /// updated on every `transfer`, `transferFrom`, and `claim` calls. /// @dev While `claimedAmountAfterTransfer` contains a fraction of the `claimedAmountAfterTransfer`s of every token /// transfer the owner of account receives, `claimedBalance` works as a counter for tokens claimed by this account. struct Metadata { uint256 claimedAmountAfterTransfer; uint256 claimedBalance; } /// @param account Address that will receive the `amount` of `underlyingToken`. /// @param amount Amount of tokens that will be sent to the `account`. event Claim(address indexed account, uint256 amount); /// @param account Address that will burn the `amount` of `underlyingToken`. /// @param amount Amount of tokens that will be sent to the dead address. event Burn(address indexed account, uint256 amount); /// @param milestoneIndex Index of the Milestone reached. event MilestoneReached(uint256 indexed milestoneIndex); /// @dev Percentages and fees are calculated using 18 decimals where 1 ether is 100%. uint256 internal constant ONE = 1 ether; /// @notice The ERC20 token that this contract will be vesting. ERC20Upgradeable public underlyingToken; /// @notice The manager that deployed this contract which controls the values for `fee` and `feeCollector`. IFeeManager public manager; /// @dev The `decimals` value that is fetched from `underlyingToken`. uint8 internal _decimals; /// @dev The initial supply used for calculating the `claimableSupply`, `claimedSupply`, and `lockedSupply`. uint256 internal _startingSupply; /// @dev The imported claimed supply is necessary for an accurate `claimableSupply` but leads to an improper offset /// in `claimedSupply`, so we keep track of this to account for it. uint256 internal _importedClaimedSupply; /// @notice An array of Milestones describing the times and behaviour of the rules to release the vested tokens. Milestone[] internal _milestones; /// @notice Keep track of the last reached Milestone to minimize the iterations over the milestones and save gas. uint256 internal _lastReachedMilestone; /// @dev Maps a an address to the metadata needed to calculate `claimableBalance` and `lockedBalanceOf`. mapping(address => Metadata) internal _metadata; /// @notice Stores the custom permanent fee data. IFeeManager.PermanentFeeData public permFeeData; /// @custom:oz-upgrades-unsafe-allow constructor constructor() { _disableInitializers(); } /** * @notice Initializes the contract by setting up the ERC20 variables, the `underlyingToken`, and the * `milestonesArray` information. * * @dev The Ramp of the first Milestone in the `milestonesArray` will always act as a Cliff since it doesn't have * a previous milestone. * * Requirements: * * - `underlyingTokenAddress` cannot be the zero address. * - `timestamps` must be given in ascending order. * - `percentages` must be given in ascending order and the last one must always be 1 eth, where 1 eth equals to * 100%. * - 2 `percentages` may have the same value as long as they are followed by a `Ramp.Linear` Milestone. * * @param name This ERC20 token name. * @param symbol This ERC20 token symbol. * @param underlyingTokenAddress The ERC20 token that will be held by this contract. * @param milestonesArray Array of all `Milestone`s for this contract's lifetime. * @param customPermanentFee The custom permanent fee for the `VestingToken`, in case it has one. */ function initialize( string calldata name, string calldata symbol, address underlyingTokenAddress, Milestone[] calldata milestonesArray, IFeeManager.PermanentFeeData calldata customPermanentFee ) external initializer { __ERC20_init(name, symbol); __ReentrancyGuard_init(); manager = IFeeManager(msg.sender); _setupMilestones(milestonesArray); underlyingToken = ERC20Upgradeable(underlyingTokenAddress); _decimals = _tryFetchDecimals(); permFeeData = customPermanentFee; } /// @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. Since we can't predict /// the decimals the `underlyingToken` will have, we need to provide our own implementation which is setup at /// initialization. /// /// NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the /// contract. function decimals() public view virtual override returns (uint8) { return _decimals; } /// @notice Vests an `amount` of `underlyingToken` and mints LVTs for a `recipient`. /// /// Requirements: /// /// - `msg.sender` must have approved this contract an amount of `underlyingToken` greater or equal than `amount`. /// /// @param recipient The address that will receive the newly minted LVT. /// @param amount The amount of `underlyingToken` to be vested. function addRecipient(address recipient, uint256 amount) external nonReentrant { uint256 currentBalance = _getBalanceOfThis(); underlyingToken.safeTransferFrom(msg.sender, address(this), amount); uint256 transferredAmount = _getBalanceOfThis() - currentBalance; _startingSupply = _startingSupply + transferredAmount; _mint(recipient, transferredAmount); } /// @notice Vests multiple `amounts` of `underlyingToken` and mints LVTs for multiple `recipients`. /// /// Requirements: /// /// - `recipients` and `amounts` must have the same length. /// - `msg.sender` must have approved this contract an amount of `underlyingToken` greater or equal than the sum of /// all of the `amounts`. /// /// @param recipients Array of addresses that will receive the newly minted LVTs. /// @param amounts Array of amounts of `underlyingToken` to be vested. function addRecipients( address[] calldata recipients, uint256[] calldata amounts, uint256 totalAmount ) external nonReentrant { if (recipients.length != amounts.length) revert Errors.InputArraysMustHaveSameLength(); uint256 currentBalance = _getBalanceOfThis(); underlyingToken.safeTransferFrom(msg.sender, address(this), totalAmount); uint256 transferredAmount = _getBalanceOfThis() - currentBalance; _startingSupply = _startingSupply + transferredAmount; uint256 _totalAmount; uint256 recipientsLen = recipients.length; for (uint256 i = recipientsLen; i != 0;) { unchecked { --i; } address recipient = Arrays.unsafeMemoryAccess(recipients, i); uint256 curAmount = Arrays.unsafeMemoryAccess(amounts, i); _totalAmount += Arrays.unsafeMemoryAccess(amounts, i); uint256 amount = transferredAmount == totalAmount ? curAmount : (curAmount * transferredAmount) / totalAmount; _mint(recipient, amount); } if (_totalAmount != totalAmount) revert Errors.InvalidTotalAmount(); } /** * @notice Behaves as `addRecipient` but provides the ability to set the initial state of the recipient's metadata. * @notice This functionality is included in order to allow users to restart an allocation on a different chain and * keeping the inner state as close as possible to the original. * * @dev The `Metadata.claimedAmountAfterTransfer` for the recipient is inferred from the parameters. * @dev The `Metadata.claimedBalance` is lost in the transfer, the closest value will be * `claimedAmountAfterTransfer`. * @dev In the rare case where the contract and it's users are migrated after the last milestone has been reached, * the `claimedAmountAfterTransfer` can't be inferred and the `claimedSupply` value for the whole contract is lost * in the transfer. * @dev The decision to do this is to minimize the altering of metadata to the amount that is being transferred and * protect an attack that would render the contract unusable. * * Requirements: * * - `unlocked` must be less than or equal to this contracts `unlockedPercentage`. * - `claimableAmountOfImport` must be less than or equal than the amount that would be claimable given the values * of `amount` and `percentage`. * - `msg.sender` must have approved this contract an amount of `underlyingToken` greater or equal than `amount`. * * @param recipient The address that will receive the newly minted LVT. * @param amount The amount of `underlyingToken` to be vested. * @param claimableAmountOfImport The amount of `underlyingToken` from this transaction that should be considered * claimable. * @param unlocked The unlocked percentage value at the time of the export of this transaction. */ function importRecipient( address recipient, uint256 amount, uint256 claimableAmountOfImport, uint256 unlocked ) external nonReentrant { if (unlocked > unlockedPercentage()) revert Errors.UnlockedIsGreaterThanExpected(); uint256 currentBalance = _getBalanceOfThis(); underlyingToken.safeTransferFrom(msg.sender, address(this), amount); uint256 transferredAmount = _getBalanceOfThis() - currentBalance; uint256 claimedAmount = _claimedAmount(transferredAmount, claimableAmountOfImport, unlocked); _metadata[recipient].claimedAmountAfterTransfer = _metadata[recipient].claimedAmountAfterTransfer + claimedAmount; _importedClaimedSupply = _importedClaimedSupply + claimedAmount; _startingSupply = _startingSupply + transferredAmount + claimedAmount; _mint(recipient, transferredAmount); } /** * @notice Behaves as `addRecipients` but provides the ability to set the initial state of the recipient's * metadata. * @notice This functionality is included in order to allow users to restart an allocation on a different chain and * keeping the inner state as close as possible to the original. * * @dev The `Metadata.claimedAmountAfterTransfer` for each recipient is inferred from the parameters. * @dev The `Metadata.claimedBalance` is lost in the transfer, the closest value will be * `claimedAmountAfterTransfer`. * @dev In the rare case where the contract and it's users are migrated after the last milestone has been reached, * the `claimedAmountAfterTransfer` can't be inferred and the `claimedSupply` value for the whole contract is lost * in the transfer. * @dev The decision to do this to minimize the altering of metadata to the amount that is being transferred and * protect an attack that would render the contract unusable. * * @dev The Metadata for the recipient is inferred from the parameters. The decision to do this to minimize the * altering of metadata to the amount that is being transferred. * * Requirements: * * - `recipients`, `amounts`, and `claimableAmountsOfImport` must have the same length. * - `unlocked` must be less than or equal to this contracts `unlockedPercentage`. * - each value in `claimableAmountsOfImport` must be less than or equal than the amount that would be claimable * given the values in `amounts` and `percentages`. * - `msg.sender` must have approved this contract an amount of `underlyingToken` greater or equal than the sum of * all of the `amounts`. * * @param recipients Array of addresses that will receive the newly minted LVTs. * @param amounts Array of amounts of `underlyingToken` to be vested. * @param claimableAmountsOfImport Array of amounts of `underlyingToken` from this transaction that should be * considered claimable. * @param unlocked The unlocked percentage value at the time of the export of this transaction. */ function importRecipients( address[] calldata recipients, uint256[] calldata amounts, uint256[] calldata claimableAmountsOfImport, uint256 totalAmount, uint256 unlocked ) external nonReentrant { if (unlocked > unlockedPercentage()) revert Errors.UnlockedIsGreaterThanExpected(); uint256 recipientsLen = recipients.length; if (recipientsLen != amounts.length || claimableAmountsOfImport.length != amounts.length) { revert Errors.InputArraysMustHaveSameLength(); } uint256 currentBalance = _getBalanceOfThis(); underlyingToken.safeTransferFrom(msg.sender, address(this), totalAmount); uint256 transferredAmount = _getBalanceOfThis() - currentBalance; uint256 totalClaimed; uint256 _totalAmount; for (uint256 i = recipientsLen; i != 0;) { unchecked { --i; } uint256 curAmount = Arrays.unsafeMemoryAccess(amounts, i); _totalAmount += curAmount; address recipient = recipients[i]; uint256 amount = transferredAmount == totalAmount ? curAmount : (curAmount * transferredAmount) / totalAmount; uint256 claimableAmountOfImport = Arrays.unsafeMemoryAccess(claimableAmountsOfImport, i); uint256 claimedAmount = _claimedAmount(amount, claimableAmountOfImport, unlocked); _mint(recipient, amount); _metadata[recipient].claimedAmountAfterTransfer = _metadata[recipient].claimedAmountAfterTransfer + claimedAmount; totalClaimed += claimedAmount; } if (_totalAmount != totalAmount) revert Errors.InvalidTotalAmount(); _importedClaimedSupply = _importedClaimedSupply + totalClaimed; _startingSupply = _startingSupply + transferredAmount + totalClaimed; } /// @param recipient The address that will be exported. /// /// @return The arguments to use in a call `importRecipient` on a different contract to migrate the `recipient`'s /// metadata. function exportRecipient(address recipient) external view returns (address, uint256, uint256, uint256) { return (recipient, balanceOf(recipient), claimableBalanceOf(recipient), unlockedPercentage()); } /// @param recipients Array of addresses that will be exported. /// /// @return The arguments to use in a call `importRecipients` on a different contract to migrate the `recipients`' /// metadata. function exportRecipients(address[] calldata recipients) external view returns (address[] calldata, uint256[] memory, uint256[] memory, uint256) { uint256 recipientsLen = recipients.length; uint256[] memory balances = new uint256[](recipientsLen); uint256[] memory claimableBalances = new uint256[](recipientsLen); for (uint256 i = recipientsLen; i != 0;) { unchecked { --i; } address recipient = Arrays.unsafeMemoryAccess(recipients, i); balances[i] = balanceOf(recipient); claimableBalances[i] = claimableBalanceOf(recipient); } return (recipients, balances, claimableBalances, unlockedPercentage()); } /// @notice This function will check and update the `_lastReachedMilestone` so the gas usage will be minimal in /// calls to `unlockedPercentage`. /// /// @dev This function is called by claim with a value of `startIndex` equal to the previous value of /// `_lastReachedMilestone`, but can be called externally with a more accurate value in case multiple Milestones /// have been reached without anyone claiming. /// /// @param startIndex Index of the Milestone we want the loop to start checking. function updateLastReachedMilestone(uint256 startIndex) public { if (_milestones[startIndex].timestamp > block.timestamp) return; uint256 lastReachedMilestone = _lastReachedMilestone; uint256 len = _milestones.length; Milestone storage previous = _milestones[startIndex]; for (uint256 i = startIndex; i < len;) { Milestone storage current = _milestones[i]; if (current.timestamp <= block.timestamp) { previous = current; unchecked { ++i; } continue; } if (i > lastReachedMilestone + 1) { unchecked { lastReachedMilestone = i - 1; } emit MilestoneReached(lastReachedMilestone); } return; } if (lastReachedMilestone < len - 1) { unchecked { lastReachedMilestone = len - 1; } emit MilestoneReached(lastReachedMilestone); } if (lastReachedMilestone != _lastReachedMilestone) { unchecked { _lastReachedMilestone = lastReachedMilestone; } } } /// @return The percentage of `underlyingToken` that users could claim. function unlockedPercentage() public view returns (uint256) { Milestone storage previous = _milestones[_lastReachedMilestone]; // If the first Milestone is still pending, the contract hasn't started unlocking tokens if (previous.timestamp > block.timestamp) return 0; uint256 percentage = previous.percentage; uint256 milestonesLen = _milestones.length; for (uint256 i = _lastReachedMilestone + 1; i < milestonesLen;) { Milestone storage current = _milestones[i]; // If `current` Milestone has expired, `percentage` is at least `current` Milestone's percentage if (current.timestamp <= block.timestamp) { percentage = current.percentage; previous = current; unchecked { ++i; } continue; } // If `current` Milestone has a `Linear` ramp, `percentage` is between `previous` and `current` // Milestone's percentage if (current.ramp == Ramp.Linear) { percentage += ((block.timestamp - previous.timestamp) * (current.percentage - previous.percentage)) / (current.timestamp - previous.timestamp); } // `percentage` won't change after this break; } return percentage; } /// @return The amount of `underlyingToken` that were held in this contract and have been claimed. function claimedSupply() external view returns (uint256) { return _startingSupply - totalSupply() - _importedClaimedSupply; } /// @return The amount of `underlyingToken` being held in this contract and that can be claimed. function claimableSupply() public view returns (uint256) { return _claimableAmount(_startingSupply, _startingSupply - totalSupply()); } /// @return The amount of `underlyingToken` being held in this contract that can't be claimed yet. function lockedSupply() external view returns (uint256) { return totalSupply() - claimableSupply(); } /// @param account The address whose tokens are being queried. /// @return The amount of `underlyingToken` that were held in this contract and this `account` already claimed. function claimedBalanceOf(address account) external view returns (uint256) { return _metadata[account].claimedBalance; } /// @param account The address whose tokens are being queried. /// @return The amount of `underlyingToken` that this `account` owns and can claim. function claimableBalanceOf(address account) public view returns (uint256) { uint256 claimedAmountAfterTransfer = _metadata[account].claimedAmountAfterTransfer; return _claimableAmount(claimedAmountAfterTransfer + balanceOf(account), claimedAmountAfterTransfer); } /// @param account The address whose tokens are being queried. /// @return The amount of `underlyingToken` that this `account` owns but can't claim yet. function lockedBalanceOf(address account) external view returns (uint256) { return balanceOf(account) - claimableBalanceOf(account); } /// @notice Claims available unlocked `underlyingToken` for the caller. /// @dev Transfers claimable amount to `msg.sender` and requires a claim fee (`msg.value`). /// Reverts if there's no claimable amount. Protected against re-entrancy. function claim() external payable nonReentrant { address account = msg.sender; Metadata storage accountMetadata = _metadata[account]; updateLastReachedMilestone(_lastReachedMilestone); uint256 claimableAmount = _claimableAmount( accountMetadata.claimedAmountAfterTransfer + balanceOf(account), accountMetadata.claimedAmountAfterTransfer ); if (claimableAmount == 0) { revert Errors.NoClaimableAmount(); } _burn(account, claimableAmount); accountMetadata.claimedAmountAfterTransfer = accountMetadata.claimedAmountAfterTransfer + claimableAmount; accountMetadata.claimedBalance = accountMetadata.claimedBalance + claimableAmount; emit Claim(account, claimableAmount); underlyingToken.safeTransfer(account, claimableAmount); _processClaimFee(); } /// @notice Allows an investor to burn their vested and underlying tokens. /// @dev First attempts to burn the underlying tokens. If unsuccessful, these are sent to address '0xdead'. This /// operation is followed by the burning of the equivalent vested tokens. /// Assumes the underlying token has a burn function with the selector '0x42966c68'. /// @param amount Amount of tokens to be burnt. The investor's locked balance must be greater or equal than this /// amount. function burn(uint256 amount) public payable { uint256 currentBalance = _getBalanceOfThis(); address account = msg.sender; address underlyingAddress = address(underlyingToken); emit Burn(account, amount); // Selector for "burn(uint256)" bytes4 burnSelector = 0x42966c68; // Encoding calldata for burn function (bool burnSuccess,) = underlyingAddress.call(abi.encodeWithSelector(burnSelector, amount)); if (!burnSuccess) { underlyingToken.safeTransfer(address(0xdead), amount); } uint256 transferredAmount = currentBalance - _getBalanceOfThis(); _startingSupply = _startingSupply - transferredAmount; _burn(account, amount); } /// @notice Calculates and transfers the fee before executing a normal ERC20 transfer. /// /// @dev This method also updates the metadata in `msg.sender`, `to`, and `feeCollector`. /// /// @param to Address of recipient. /// @param amount Amount of tokens. function transfer(address to, uint256 amount) public override returns (bool) { _updateMetadataAndTransfer(msg.sender, to, amount, true); return true; } /// @notice Calculates and transfers the fee before executing a normal ERC20 transferFrom. /// /// @dev This method also updates the metadata in `from`, `to`, and `feeCollector`. /// /// @param from Address of sender. /// @param to Address of recipient. /// @param amount Amount of tokens. function transferFrom(address from, address to, uint256 amount) public override returns (bool) { _updateMetadataAndTransfer(from, to, amount, false); return true; } /// @notice Exposes the whole array of `_milestones`. function milestones() external view returns (Milestone[] memory) { return _milestones; } /// @notice Exposes the inner metadata for a given account. /// @param account The address whose tokens are being queried. function metadataOf(address account) external view returns (Metadata memory metadata) { metadata = _metadata[account]; } /// @notice Returns the current transfer fee associated to this `VestingToken`. function transferFeeData() public view returns (address, uint64) { IFeeManager.PermanentFeeData memory permanentFeeData = permFeeData; if (permanentFeeData.isEnabled) { return (permanentFeeData.feeCollector, permanentFeeData.transferFeePercentage); } return manager.transferFeeData(address(underlyingToken)); } /// @notice Returns the current claim fee associated to this `VestingToken`. function claimFeeData() public view returns (address, uint64) { IFeeManager.PermanentFeeData memory permanentFeeData = permFeeData; if (permanentFeeData.isEnabled) { return (permanentFeeData.feeCollector, permanentFeeData.claimFee); } return manager.claimFeeData(address(underlyingToken)); } /** * @dev This function updates the metadata on the `sender`, the `receiver`, and the `feeCollector` if there's any * fee involved. The changes on the metadata are on the value `claimedAmountAfterTransfer` which is used to * calculate `_claimableAmount`. * * @dev The math behind these changes can be explained by the following logic: * * 1) claimableAmount = (unlockedPercentage * startingAmount) / ONE - claimedAmount * * When there's a transfer of an amount, we transfer both locked and unlocked tokens so the * `claimableAmountAfterTransfer` will look like: * * 2) claimableAmountAfterTransfer = claimableAmount ± claimableAmountOfTransfer * * Notice the ± symbol is because the `sender`'s `claimableAmount` is reduced while the `receiver`'s * `claimableAmount` is increased. * * 3) claimableAmountOfTransfer = claimableAmountOfSender * amountOfTransfer / balanceOfSender * * We can expand 3) into: * * 4) claimableAmountOfTransfer = * (unlockedPercentage * ((startingAmountOfSender * amountOfTransfer) / balanceOfSender)) / ONE) - * ((claimedAmountOfSender * amountOfTransfer) / balanceOfSender) * * Notice how the structure of the equation is the same as 1) and 2 new variables can be created to calculate * `claimableAmountOfTransfer` * * a) startingAmountOfTransfer = (startingAmountOfSender * amountOfTransfer) / balanceOfSender * b) claimedAmountOfTransfer = (claimedAmountOfSender * amountOfTransfer) / balanceOfSender * * Replacing `claimableAmountOfTransfer` in equation 2) and expanding it, we get: * * 5) claimableAmountAfterTransfer = * ((unlockedPercentage * startingAmount) / ONE - claimedAmount) ± * ((unlockedPercentage * startingAmountOfTransfer) / ONE - claimedAmountOfTransfer) * * We can group similar variables like this: * * 6) claimableAmountAfterTransfer = * (unlockedPercentage * (startingAmount - startingAmountOfTransfer)) / ONE - * (claimedAmount - claimedAmountOfTransfer) * * This shows that the new values to calculate `claimableAmountAfterTransfer` if we want to continue using the * equation 1) are: * * c) startingAmountAfterTransfer = * startingAmount ± * (startingAmountOfSender * amountOfTransfer) / balanceOfSender * d) claimedAmountAfterTransfer = * claimedAmount ± * (claimedAmountOfSender * amountOfTransfer) / balanceOfSender * * Since these values depend linearly on the value of `amountOfTransfer`, and the fee is a fraction of the amount, * we can just factor in the `transferFeePercentage` to get the values for the transfer to the `feeCollector`. * * e) startingAmountOfFee = (startingAmountOfTransfer * transferFeePercentage) / ONE; * f) claimedAmountOfFee = (claimedAmountOfTransfer * transferFeePercentage) / ONE; * * If we look at equation 1) and set `unlockedPercentage` to ONE, then `claimableAmount` must equal to the * `balance`. Therefore the relation between `startingAmount`, `claimedAmount`, and `balance` should be: * * g) startingAmount = claimedAmount + balance * * Since we want to minimize independent rounding in all of the `startingAmount`s, and `claimedAmount`s we will * calculate the `claimedAmount` using multiplication and division as shown in b) and f), and the `startingAmount` * can be derived using a simple subtraction. * With this we ensure that if there's a rounding down in the divisions, we won't be leaving any token locked. * * @param from Address of sender. * @param to Address of recipient. * @param amount Amount of tokens. * @param isTransfer If a fee is charged, this will let the function know whether to use `transfer` or * `transferFrom` to collect the fee. */ function _updateMetadataAndTransfer(address from, address to, uint256 amount, bool isTransfer) internal { Metadata storage accountMetadata = _metadata[from]; // Calculate `claimedAmountOfTransfer` as described on equation b) // uint256 can handle 78 digits well. Normally token transactions have 18 decimals that gives us 43 digits of // wiggle room in the multiplication `(accountMetadata.claimedAmountAfterTransfer * amount)` without // overflowing. uint256 claimedAmountOfTransfer = (accountMetadata.claimedAmountAfterTransfer * amount) / balanceOf(from); // Modify `claimedAmountAfterTransfer` of the sender following equation d) // Notice in this case we are reducing the value accountMetadata.claimedAmountAfterTransfer = accountMetadata.claimedAmountAfterTransfer - claimedAmountOfTransfer; if (to != from) { (address feeCollector, uint64 transferFeePercentage) = transferFeeData(); if (transferFeePercentage != 0) { // The values of `fee` and `claimedAmountOfFee` are calculated using the `transferFeePercentage` shown // in equation f) uint256 fee = (amount * transferFeePercentage); unchecked { fee /= ONE; } uint256 claimedAmountOfFee = (claimedAmountOfTransfer * transferFeePercentage); unchecked { claimedAmountOfFee /= ONE; } // The values for the receiver need to be updated accordingly amount -= fee; claimedAmountOfTransfer -= claimedAmountOfFee; // Modify `claimedAmountAfterTransfer` of the feeCollector following equation d) // Notice in this case we are increasing the value _metadata[feeCollector].claimedAmountAfterTransfer = _metadata[feeCollector].claimedAmountAfterTransfer + claimedAmountOfFee; if (isTransfer) { super.transfer(feeCollector, fee); } else { super.transferFrom(from, feeCollector, fee); } } } // Modify `claimedAmountAfterTransfer` of the receiver following equation d) // Notice in this case we are increasing the value // The next line triggers the linter because it's not aware that super.transfer does not call an external // contract, nor does trigger a fallback function. // solhint-disable-next-line reentrancy _metadata[to].claimedAmountAfterTransfer = _metadata[to].claimedAmountAfterTransfer + claimedAmountOfTransfer; if (isTransfer) { super.transfer(to, amount); } else { super.transferFrom(from, to, amount); } } /// @notice Validates and initializes the VestingToken milestones. /// @dev It will perform validations on the calldata: /// @dev - Milestones have percentages and timestamps sorted in ascending order. /// @dev - No more than 2 consecutive Milestones can have the same percentage. /// @dev - 2 Milestones may have the same percentage as long as they are followed by a Milestone with a /// `Ramp.Linear`. /// @dev - Only the last Milestone should have 100% percentage. function _setupMilestones(Milestone[] calldata milestonesArray) internal { if (milestonesArray.length == 0) revert Errors.MinMilestonesNotReached(); if (milestonesArray.length > 826) revert Errors.MaxAllowedMilestonesHit(); Milestone calldata current = milestonesArray[0]; bool twoInARow; uint256 milestonesLen = milestonesArray.length; for (uint256 i; i < milestonesLen;) { if (i != 0) { Milestone calldata previous = current; current = milestonesArray[i]; if (previous.timestamp >= current.timestamp) revert Errors.MilestoneTimestampsNotSorted(); if (previous.percentage > current.percentage) revert Errors.MilestonePercentagesNotSorted(); if (twoInARow) { if (previous.percentage == current.percentage) revert Errors.MoreThanTwoEqualPercentages(); if (current.ramp != Ramp.Linear) revert Errors.EqualPercentagesOnlyAllowedBeforeLinear(); } twoInARow = previous.percentage == current.percentage; } if (i == milestonesLen - 1) { if (current.percentage != ONE) revert Errors.LastPercentageMustBe100(); } else { if (current.percentage == ONE) revert Errors.OnlyLastPercentageCanBe100(); } _milestones.push(current); unchecked { ++i; } } } /// @dev Perform a staticcall to attempt to fetch `underlyingToken`'s decimals. In case of an error, we default to /// 18. function _tryFetchDecimals() internal view returns (uint8) { (bool success, bytes memory encodedDecimals) = address(underlyingToken).staticcall(abi.encodeWithSelector(ERC20Upgradeable.decimals.selector)); if (success && encodedDecimals.length >= 32) { uint256 returnedDecimals; assembly { // Since `encodedDecimals` is a dynamic array, its first 32 bytes store the data's length returnedDecimals := mload(add(encodedDecimals, 32)) } // type(uint8).max => 255 if (returnedDecimals <= 255) { return uint8(returnedDecimals); } } return 18; } /// @dev Perform a staticcall to attempt to fetch `underlyingToken`'s balance of this contract. In case of an error, /// reverts with custom `UnsuccessfulFetchOfTokenBalance` error. function _getBalanceOfThis() internal view returns (uint256 returnedBalance) { (bool success, bytes memory encodedBalance) = address(underlyingToken).staticcall( abi.encodeWithSelector(ERC20Upgradeable.balanceOf.selector, address(this)) ); if (success && encodedBalance.length >= 32) { assembly { // Since `encodedBalance` is a dynamic array, its first 32 bytes store the data's length returnedBalance := mload(add(encodedBalance, 32)) } return returnedBalance; } revert Errors.UnsuccessfulFetchOfTokenBalance(); } /// @notice This method is used to infer the value of claimed amounts. /// /// @dev If the unlocked percentage has already reached 100%, there's no way to infer the claimed amount. /// /// @param amount Amount of `underlyingToken` in the transaction. /// @param claimableAmountOfImport Amount of `underlyingToken` from this transaction that should be considered /// claimable. /// @param unlocked The unlocked percentage value at the time of the export of this transaction. /// /// @return Amount of `underlyingToken` that has been claimed based on the arguments given. function _claimedAmount( uint256 amount, uint256 claimableAmountOfImport, uint256 unlocked ) internal pure returns (uint256) { if (unlocked == ONE) return 0; uint256 a = unlocked * amount; uint256 b = ONE * claimableAmountOfImport; // If `a - b` underflows, we display a better error message. if (b > a) revert Errors.ClaimableAmountOfImportIsGreaterThanExpected(); return (a - b) / (ONE - unlocked); } /// @param startingAmount Amount of `underlyingToken` originally held. /// @param claimedAmount Amount of `underlyingToken` already claimed. /// /// @return Amount of `underlyingToken` that can be claimed based on the milestones reached and initial amounts /// given. function _claimableAmount(uint256 startingAmount, uint256 claimedAmount) internal view returns (uint256) { uint256 unlocked = (unlockedPercentage() * startingAmount); unchecked { unlocked /= ONE; } return unlocked < claimedAmount ? 0 : unlocked - claimedAmount; } /// @notice Processes the claim fee for a transaction. /// @dev This function retrieves the claim fee data from the manager contract and, if the claim fee is greater than /// zero, sends the `msg.value` to the fee collector address. Reverts if the transferred value is less than the /// required claim fee or if the transfer fails. function _processClaimFee() private { (address feeCollector, uint64 claimFeeValue) = claimFeeData(); if (claimFeeValue != 0) { if (msg.value != claimFeeValue) revert Errors.IncorrectClaimFee(); bytes4 unsuccessfulClaimFeeTransfer = Errors.UnsuccessfulClaimFeeTransfer.selector; assembly { let ptr := mload(0x40) let sendSuccess := call(gas(), feeCollector, callvalue(), 0x00, 0x00, 0x00, 0x00) if iszero(sendSuccess) { mstore(ptr, unsuccessfulClaimFeeTransfer) revert(ptr, 0x04) } } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; import {IERC20Permit} from "../extensions/IERC20Permit.sol"; import {Address} from "../../../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; /** * @dev An operation with an ERC20 token failed. */ error SafeERC20FailedOperation(address token); /** * @dev Indicates a failed `decreaseAllowance` request. */ error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease); /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value))); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value))); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); forceApprove(token, spender, oldAllowance + value); } /** * @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no * value, non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal { unchecked { uint256 currentAllowance = token.allowance(address(this), spender); if (currentAllowance < requestedDecrease) { revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease); } forceApprove(token, spender, currentAllowance - requestedDecrease); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval * to be set to zero before setting it to a non-zero value, such as USDT. */ function forceApprove(IERC20 token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value)); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0))); _callOptionalReturn(token, approvalCall); } } /** * @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); if (returndata.length != 0 && !abi.decode(returndata, (bool))) { revert SafeERC20FailedOperation(address(token)); } } /** * @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). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) { // 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 cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/ERC20.sol) pragma solidity ^0.8.20; import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import {IERC20Metadata} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import {ContextUpgradeable} from "../../utils/ContextUpgradeable.sol"; import {IERC20Errors} from "@openzeppelin/contracts/interfaces/draft-IERC6093.sol"; import {Initializable} from "../../proxy/utils/Initializable.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}. * * 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. */ abstract contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20, IERC20Metadata, IERC20Errors { /// @custom:storage-location erc7201:openzeppelin.storage.ERC20 struct ERC20Storage { mapping(address account => uint256) _balances; mapping(address account => mapping(address spender => uint256)) _allowances; uint256 _totalSupply; string _name; string _symbol; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ERC20")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant ERC20StorageLocation = 0x52c63247e1f47db19d5ce0460030c497f067ca4cebf71ba98eeadabe20bace00; function _getERC20Storage() private pure returns (ERC20Storage storage $) { assembly { $.slot := ERC20StorageLocation } } /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing { __ERC20_init_unchained(name_, symbol_); } function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing { ERC20Storage storage $ = _getERC20Storage(); $._name = name_; $._symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual returns (string memory) { ERC20Storage storage $ = _getERC20Storage(); return $._name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual returns (string memory) { ERC20Storage storage $ = _getERC20Storage(); 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 returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual returns (uint256) { ERC20Storage storage $ = _getERC20Storage(); return $._totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual returns (uint256) { ERC20Storage storage $ = _getERC20Storage(); return $._balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `value`. */ function transfer(address to, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _transfer(owner, to, value); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual returns (uint256) { ERC20Storage storage $ = _getERC20Storage(); return $._allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `value` 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 value) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, value); 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 `value`. * - the caller must have allowance for ``from``'s tokens of at least * `value`. */ function transferFrom(address from, address to, uint256 value) public virtual returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, value); _transfer(from, to, value); return true; } /** * @dev Moves a `value` 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. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _transfer(address from, address to, uint256 value) internal { if (from == address(0)) { revert ERC20InvalidSender(address(0)); } if (to == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(from, to, value); } /** * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from` * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding * this function. * * Emits a {Transfer} event. */ function _update(address from, address to, uint256 value) internal virtual { ERC20Storage storage $ = _getERC20Storage(); if (from == address(0)) { // Overflow check required: The rest of the code assumes that totalSupply never overflows $._totalSupply += value; } else { uint256 fromBalance = $._balances[from]; if (fromBalance < value) { revert ERC20InsufficientBalance(from, fromBalance, value); } unchecked { // Overflow not possible: value <= fromBalance <= totalSupply. $._balances[from] = fromBalance - value; } } if (to == address(0)) { unchecked { // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply. $._totalSupply -= value; } } else { unchecked { // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256. $._balances[to] += value; } } emit Transfer(from, to, value); } /** * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0). * Relies on the `_update` mechanism * * Emits a {Transfer} event with `from` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _mint(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(address(0), account, value); } /** * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply. * Relies on the `_update` mechanism. * * Emits a {Transfer} event with `to` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead */ function _burn(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidSender(address(0)); } _update(account, address(0), value); } /** * @dev Sets `value` 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. * * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument. */ function _approve(address owner, address spender, uint256 value) internal { _approve(owner, spender, value, true); } /** * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event. * * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any * `Approval` event during `transferFrom` operations. * * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to * true using the following override: * ``` * function _approve(address owner, address spender, uint256 value, bool) internal virtual override { * super._approve(owner, spender, value, true); * } * ``` * * Requirements are the same as {_approve}. */ function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual { ERC20Storage storage $ = _getERC20Storage(); if (owner == address(0)) { revert ERC20InvalidApprover(address(0)); } if (spender == address(0)) { revert ERC20InvalidSpender(address(0)); } $._allowances[owner][spender] = value; if (emitEvent) { emit Approval(owner, spender, value); } } /** * @dev Updates `owner` s allowance for `spender` based on spent `value`. * * Does not update the allowance value in case of infinite allowance. * Revert if not enough allowance is available. * * Does not emit an {Approval} event. */ function _spendAllowance(address owner, address spender, uint256 value) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { if (currentAllowance < value) { revert ERC20InsufficientAllowance(spender, currentAllowance, value); } unchecked { _approve(owner, spender, currentAllowance - value, false); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (utils/ReentrancyGuard.sol) pragma solidity ^0.8.20; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuardUpgradeable is Initializable { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant NOT_ENTERED = 1; uint256 private constant ENTERED = 2; /// @custom:storage-location erc7201:openzeppelin.storage.ReentrancyGuard struct ReentrancyGuardStorage { uint256 _status; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.ReentrancyGuard")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant ReentrancyGuardStorageLocation = 0x9b779b17422d0df92223018b32b4d1fa46e071723d6817e2486d003becc55f00; function _getReentrancyGuardStorage() private pure returns (ReentrancyGuardStorage storage $) { assembly { $.slot := ReentrancyGuardStorageLocation } } /** * @dev Unauthorized reentrant call. */ error ReentrancyGuardReentrantCall(); function __ReentrancyGuard_init() internal onlyInitializing { __ReentrancyGuard_init_unchained(); } function __ReentrancyGuard_init_unchained() internal onlyInitializing { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); $._status = NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); // On the first call to nonReentrant, _status will be NOT_ENTERED if ($._status == ENTERED) { revert ReentrancyGuardReentrantCall(); } // Any calls to nonReentrant after this point will fail $._status = ENTERED; } function _nonReentrantAfter() private { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) $._status = NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { ReentrancyGuardStorage storage $ = _getReentrancyGuardStorage(); return $._status == ENTERED; } }
// SPDX-License-Identifier: None // Unvest Contracts (last updated v3.1.0) (libraries/Errors.sol) pragma solidity ^0.8.24; /// @title Errors Library /// @notice Provides custom errors for VestingTokenFactory and VestingToken contracts. library Errors { /*////////////////////////////////////////////////////// VestingTokenFactory //////////////////////////////////////////////////////*/ /// @notice Error to indicate that an address cannot be the zero address. error AddressCanNotBeZero(); /// @notice Error to indicate that deployment of a contract failed. error FailedToDeploy(); /// @notice Error to indicate that a fee is out of the accepted range. error FeeOutOfRange(); /// @notice Error to indicate that the creation fee is insufficient. error InsufficientCreationFee(); /// @notice Error to indicate an unsuccessful transfer of the creation fee. error UnsuccessfulCreationFeeTransfer(); /*////////////////////////////////////////////////////// VestingToken //////////////////////////////////////////////////////*/ /// @notice Error to indicate that the minimum number of milestones has not been reached. error MinMilestonesNotReached(); /// @notice Error to indicate that the maximum number of milestones has been exceeded. error MaxAllowedMilestonesHit(); /// @notice Error to indicate that the claimable amount of an import is greater than expected. error ClaimableAmountOfImportIsGreaterThanExpected(); /// @notice Error to indicate that equal percentages are only allowed before setting up linear milestones. error EqualPercentagesOnlyAllowedBeforeLinear(); /// @notice Error to indicate that the sum of all individual amounts is not equal to the `totalAmount`. error InvalidTotalAmount(); /// @notice Error to indicate that input arrays must have the same length. error InputArraysMustHaveSameLength(); /// @notice Error to indicate that the last percentage in a milestone must be 100. error LastPercentageMustBe100(); /// @notice Error to indicate that milestone percentages are not sorted in ascending order. error MilestonePercentagesNotSorted(); /// @notice Error to indicate that milestone timestamps are not sorted in ascending chronological order. error MilestoneTimestampsNotSorted(); /// @notice Error to indicate that there are more than two equal percentages, which is not allowed. error MoreThanTwoEqualPercentages(); /// @notice Error to indicate that only the last percentage in a series can be 100. error OnlyLastPercentageCanBe100(); /// @notice Error to indicate that the amount unlocked is greater than expected. error UnlockedIsGreaterThanExpected(); /// @notice Error to indicate an unsuccessful fetch of token balance. error UnsuccessfulFetchOfTokenBalance(); /// @notice Error to indicate that the claim fee provided does not match the expected claim fee. error IncorrectClaimFee(); /// @notice Error to indicate an unsuccessful transfer of the claim fee. error UnsuccessfulClaimFeeTransfer(); /// @notice Error to indicate that there is no balance available to claim. error NoClaimableAmount(); }
// SPDX-License-Identifier: None // Unvest Contracts (last updated v3.1.0) (libraries/Arrays.sol) pragma solidity ^0.8.24; /** * @dev Collection of functions related to array types. * @dev This is an extract from OpenZeppelin Arrays util contract. */ library Arrays { struct AddressSlot { address value; } struct Uint256Slot { uint256 value; } /// @dev Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. function unsafeMemoryAccess(address[] memory arr, uint256 pos) internal pure returns (address res) { assembly { res := mload(add(add(arr, 0x20), mul(pos, 0x20))) } } /// @dev Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. function unsafeMemoryAccess(bytes32[] memory arr, uint256 pos) internal pure returns (bytes32 res) { assembly { res := mload(add(add(arr, 0x20), mul(pos, 0x20))) } } /// @dev Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. function unsafeMemoryAccess(uint256[] memory arr, uint256 pos) internal pure returns (uint256 res) { assembly { res := mload(add(add(arr, 0x20), mul(pos, 0x20))) } } }
// SPDX-License-Identifier: None // Unvest Contracts (last updated v3.1.0) (interfaces/IFeeManager.sol) pragma solidity ^0.8.24; /// @title IFeeManager /// @dev Interface that describes the struct and accessor function for the data related to the collection of fees. interface IFeeManager { /// @dev The `FeeData` struct is used to store fee configurations such as the collection address and fee amounts for /// various transaction types in the contract. struct FeeData { /// @notice The address designated to collect fees. /// @dev This address is responsible for receiving fees generated from various sources. address feeCollector; /// @notice The fixed fee amount required to be sent as value with each `createVestingToken` operation. /// @dev `creationFee` is denominated in the smallest unit of the token. It must be sent as the transaction /// value during the execution of the payable `createVestingToken` function. uint64 creationFee; /// @notice The transfer fee expressed in ether, where 0.01 ether corresponds to a 1% fee. /// @dev `transferFeePercentage` is not in basis points but in ether units, with each ether unit representing a /// percentage of the transaction value to be collected as a fee. This structure allows for flexible and easily /// understandable fee calculations for `transfer` and `transferFrom` operations. uint64 transferFeePercentage; /// @notice The fixed fee amount required to be sent as value with each `claim` operation. /// @dev `claimFee` is denominated in the smallest unit of the token. It must be sent as the transaction value /// during the execution of the payable `claim` function. uint64 claimFee; } /// @dev Stores global fee data upcoming change and timestamp for that change. struct UpcomingFeeData { /// @notice The new fee value in wei to be applied at `valueChangeAt`. uint64 nextValue; /// @notice Timestamp at which a new fee value becomes effective. uint64 valueChangeAt; } /// @dev Stores custom fee data, including its current state, upcoming changes, and the timestamps for those /// changes. struct CustomFeeData { /// @notice Indicates if the custom fee is currently enabled. bool isEnabled; /// @notice The current fee value in wei. uint64 value; /// @notice The new fee value in wei to be applied at `valueChangeAt`. uint64 nextValue; /// @notice Timestamp at which a new fee value becomes effective. uint64 valueChangeAt; /// @notice Indicates the future state of `isEnabled` after `statusChangeAt`. bool nextEnableState; /// @notice Timestamp at which the change to `isEnabled` becomes effective. uint64 statusChangeAt; } /// @dev Stores custom permanent fee data. struct PermanentFeeData { /// @notice Indicates if the permanent fee is currently enabled. bool isEnabled; /// @notice See `FeeData.feeCollector`. address feeCollector; /// @notice See `FeeData.transferFeePercentage`. uint64 transferFeePercentage; /// @notice See `FeeData.claimFee`. uint64 claimFee; } /// @notice Exposes the creation fee for new `VestingToken`s deployments. /// @param underlyingToken Address of the `underlyingToken`. /// @dev Enabled custom fees overrides the global creation fee. function creationFeeData(address underlyingToken) external view returns (address feeCollector, uint64 creationFeeValue); /// @notice Exposes the transfer fee for `VestingToken`s to consume. /// @param underlyingToken Address of the `underlyingToken`. /// @dev Enabled custom fees overrides the global transfer fee. function transferFeeData(address underlyingToken) external view returns (address feeCollector, uint64 transferFeePercentage); /// @notice Exposes the claim fee for `VestingToken`s to consume. /// @param underlyingToken Address of the `underlyingToken`. /// @dev Enabled custom fees overrides the global claim fee. function claimFeeData(address underlyingToken) external view returns (address feeCollector, uint64 claimFeeValue); }
// SPDX-License-Identifier: None // Unvest Contracts (last updated v3.1.0) (interfaces/IVestingToken.sol) pragma solidity ^0.8.24; import { IFeeManager } from "./IFeeManager.sol"; /// @title IVestingToken /// @dev Interface that describes the Milestone struct and initialize function so the `VestingTokenFactory` knows how to /// initialize the `VestingToken`. interface IVestingToken { /// @dev Ramps describes how the periods between release tokens. /// - Cliff releases nothing until the end of the period. /// - Linear releases tokens every second according to a linear slope. /// /// (0) Cliff (1) Linear /// | | /// | _____ | _____ /// | | | / /// | | | / /// |_______|_____ |_____/_______ /// T0 T1 T0 T1 /// enum Ramp { Cliff, Linear } /// @dev `timestamp` represents a moment in time when this Milestone is considered expired. /// @dev `ramp` defines the behaviour of the release of tokens in period between the previous Milestone and the /// current one. /// @dev `percentage` is the percentage of tokens that should be released once this Milestone has expired. struct Milestone { uint64 timestamp; Ramp ramp; uint64 percentage; } /// @notice Initializes the contract by setting up the ERC20 variables, the `underlyingToken`, and the /// `milestonesArray` information. /// /// @param name The token collection name. /// @param symbol The token collection symbol. /// @param underlyingTokenAddress The ERC20 token that will be held by this contract. /// @param milestonesArray Array of all Milestones for this Contract's lifetime. /// @param permanentFeeData The custom permanent fee for the associated with the `underlyingToken`. function initialize( string memory name, string memory symbol, address underlyingTokenAddress, Milestone[] calldata milestonesArray, IFeeManager.PermanentFeeData calldata permanentFeeData ) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.20; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the value of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the value of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves a `value` amount of tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 value) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets a `value` amount of tokens as the allowance of `spender` over the * caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 value) external returns (bool); /** * @dev Moves a `value` amount of tokens from `from` to `to` using the * allowance mechanism. `value` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 value) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.20; /** * @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. * * ==== Security Considerations * * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be * considered as an intention to spend the allowance in any specific way. The second is that because permits have * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be * generally recommended is: * * ```solidity * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public { * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {} * doThing(..., value); * } * * function doThing(..., uint256 value) public { * token.safeTransferFrom(msg.sender, address(this), value); * ... * } * ``` * * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also * {SafeERC20-safeTransferFrom}). * * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so * contracts should have entry points that don't rely on permit. */ 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]. * * CAUTION: See Security Considerations above. */ 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 // OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol) pragma solidity ^0.8.20; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev The ETH balance of the account is not enough to perform the operation. */ error AddressInsufficientBalance(address account); /** * @dev There's no code at `target` (it is not a contract). */ error AddressEmptyCode(address target); /** * @dev A call to an address target failed. The target may have reverted. */ error FailedInnerCall(); /** * @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/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { if (address(this).balance < amount) { revert AddressInsufficientBalance(address(this)); } (bool success, ) = recipient.call{value: amount}(""); if (!success) { revert FailedInnerCall(); } } /** * @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 or custom error, it is bubbled * up by this function (like regular Solidity function calls). However, if * the call reverted with no returned reason, this function reverts with a * {FailedInnerCall} error. * * 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. */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0); } /** * @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`. */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { if (address(this).balance < value) { revert AddressInsufficientBalance(address(this)); } (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an * unsuccessful call. */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata ) internal view returns (bytes memory) { if (!success) { _revert(returndata); } else { // only check if target is a contract if the call was successful and the return data is empty // otherwise we already know that it was a contract if (returndata.length == 0 && target.code.length == 0) { revert AddressEmptyCode(target); } return returndata; } } /** * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the * revert reason or with a default {FailedInnerCall} error. */ function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) { if (!success) { _revert(returndata); } else { return returndata; } } /** * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}. */ function _revert(bytes memory returndata) 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 FailedInnerCall(); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.20; import {IERC20} from "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. */ 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 (last updated v5.0.1) (utils/Context.sol) pragma solidity ^0.8.20; import {Initializable} from "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } function _contextSuffixLength() internal view virtual returns (uint256) { return 0; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol) pragma solidity ^0.8.20; /** * @dev Standard ERC20 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens. */ interface IERC20Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers. * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC20InvalidApprover(address approver); /** * @dev Indicates a failure with the `spender` to be approved. Used in approvals. * @param spender Address that may be allowed to operate on tokens without being their owner. */ error ERC20InvalidSpender(address spender); } /** * @dev Standard ERC721 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens. */ interface IERC721Errors { /** * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20. * Used in balance queries. * @param owner Address of the current owner of a token. */ error ERC721InvalidOwner(address owner); /** * @dev Indicates a `tokenId` whose `owner` is the zero address. * @param tokenId Identifier number of a token. */ error ERC721NonexistentToken(uint256 tokenId); /** * @dev Indicates an error related to the ownership over a particular token. Used in transfers. * @param sender Address whose tokens are being transferred. * @param tokenId Identifier number of a token. * @param owner Address of the current owner of a token. */ error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC721InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC721InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param tokenId Identifier number of a token. */ error ERC721InsufficientApproval(address operator, uint256 tokenId); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC721InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC721InvalidOperator(address operator); } /** * @dev Standard ERC1155 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens. */ interface IERC1155Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. * @param tokenId Identifier number of a token. */ error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC1155InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC1155InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `operator`’s approval. Used in transfers. * @param operator Address that may be allowed to operate on tokens without being their owner. * @param owner Address of the current owner of a token. */ error ERC1155MissingApprovalForAll(address operator, address owner); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC1155InvalidApprover(address approver); /** * @dev Indicates a failure with the `operator` to be approved. Used in approvals. * @param operator Address that may be allowed to operate on tokens without being their owner. */ error ERC1155InvalidOperator(address operator); /** * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation. * Used in batch transfers. * @param idsLength Length of the array of token identifiers * @param valuesLength Length of the array of token amounts */ error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v5.0.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.20; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ```solidity * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Storage of the initializable contract. * * It's implemented on a custom ERC-7201 namespace to reduce the risk of storage collisions * when using with upgradeable contracts. * * @custom:storage-location erc7201:openzeppelin.storage.Initializable */ struct InitializableStorage { /** * @dev Indicates that the contract has been initialized. */ uint64 _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool _initializing; } // keccak256(abi.encode(uint256(keccak256("openzeppelin.storage.Initializable")) - 1)) & ~bytes32(uint256(0xff)) bytes32 private constant INITIALIZABLE_STORAGE = 0xf0c57e16840df040f15088dc2f81fe391c3923bec73e23a9662efc9c229c6a00; /** * @dev The contract is already initialized. */ error InvalidInitialization(); /** * @dev The contract is not initializing. */ error NotInitializing(); /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint64 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that in the context of a constructor an `initializer` may be invoked any * number of times. This behavior in the constructor can be useful during testing and is not expected to be used in * production. * * Emits an {Initialized} event. */ modifier initializer() { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); // Cache values to avoid duplicated sloads bool isTopLevelCall = !$._initializing; uint64 initialized = $._initialized; // Allowed calls: // - initialSetup: the contract is not in the initializing state and no previous version was // initialized // - construction: the contract is initialized at version 1 (no reininitialization) and the // current contract is just being deployed bool initialSetup = initialized == 0 && isTopLevelCall; bool construction = initialized == 1 && address(this).code.length == 0; if (!initialSetup && !construction) { revert InvalidInitialization(); } $._initialized = 1; if (isTopLevelCall) { $._initializing = true; } _; if (isTopLevelCall) { $._initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: Setting the version to 2**64 - 1 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint64 version) { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing || $._initialized >= version) { revert InvalidInitialization(); } $._initialized = version; $._initializing = true; _; $._initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { _checkInitializing(); _; } /** * @dev Reverts if the contract is not in an initializing state. See {onlyInitializing}. */ function _checkInitializing() internal view virtual { if (!_isInitializing()) { revert NotInitializing(); } } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { // solhint-disable-next-line var-name-mixedcase InitializableStorage storage $ = _getInitializableStorage(); if ($._initializing) { revert InvalidInitialization(); } if ($._initialized != type(uint64).max) { $._initialized = type(uint64).max; emit Initialized(type(uint64).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint64) { return _getInitializableStorage()._initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _getInitializableStorage()._initializing; } /** * @dev Returns a pointer to the storage namespace. */ // solhint-disable-next-line var-name-mixedcase function _getInitializableStorage() private pure returns (InitializableStorage storage $) { assembly { $.slot := INITIALIZABLE_STORAGE } } }
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