{{ "language": "Solidity", "sources": { "src/USAToken.sol": { "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0 <0.9.0;\n\nimport \"./Ownable.sol\";\nimport \"./ERC20Permit.sol\";\nimport \"./interfaces/IUSAToken.sol\";\nimport \"./interfaces/ITokenSwapHelper.sol\";\n\ncontract USAToken is IUSAToken, ERC20Permit, Ownable {\n uint256 public taxFeeOnBuy = 0;\n\n uint256 public taxFeeOnSell = 0;\n\n // max supply of the token (50 million)\n uint256 public immutable maximumSupply = 50 * 1e6 * 1e18;\n\n uint256 public minSwapAmount = 1e18;\n\n bool public swapToEthOnSell = false;\n\n bool public feesStatus = true;\n\n uint256 public constant percentDivider = 1e8;\n\n // the swapHelper allows the token to use potentially other types of dex designs\n ITokenSwapHelper public swapHelper;\n\n // the address that receives the dao tax\n address public daoTaxReceiver;\n\n // bool to prevernt the contract from being stuck in a loop on swapping\n bool internal swapping;\n\n // mappings with addresses that are excluded from fees\n mapping(address => bool) public isExcludedFromFee;\n\n mapping(address => bool) public approvedMinter;\n\n // mapping with addresses that are registered swap contracts (so pair contracts of DEXs)\n mapping(address => bool) internal registeredSwapContract;\n\n mapping(address => bool) public _isBlacklisted;\n\n modifier onlyMinter() {\n require(approvedMinter[_msgSender()], \"USAToken: Caller is not a minter\");\n _;\n }\n\n constructor(address _firstOwner, address _daoReceiver)\n ERC20Permit(\"USAToken\")\n ERC20(\"USA Token\", \"USA\")\n Ownable(_firstOwner)\n {\n daoTaxReceiver = _daoReceiver;\n isExcludedFromFee[address(this)] = true;\n }\n\n function transfer(address recipient, uint256 amount) public override returns (bool) {\n _transfer(_msgSender(), recipient, amount);\n return true;\n }\n\n function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {\n _transfer(sender, recipient, amount);\n _approve(sender, _msgSender(), _allowances[sender][_msgSender()] - amount);\n return true;\n }\n\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + (addedValue));\n return true;\n }\n\n function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\n _approve(_msgSender(), spender, _allowances[_msgSender()][spender] - subtractedValue);\n return true;\n }\n\n // Internal functions\n\n function _transfer(address _from, address _to, uint256 _amount) internal override {\n require(_from != address(0), \"USAToken: Transfer _from the zero address\");\n require(_to != address(0), \"USAToken: Transfer _to the zero address\");\n require(_amount > 0, \"USAToken: Amount must be greater than zero\");\n\n require(!_isBlacklisted[_from], \"USAToken: Blacklisted address\");\n require(!_isBlacklisted[_to], \"USAToken: Blacklisted address\");\n\n if (registeredSwapContract[_to] && swapToEthOnSell) {\n // only swap the collected tokens to ETH if the recipient is the swap contract (so if the user is selling)\n _distributeAndLiquify();\n }\n\n //indicates if fee should be deducted from transfer\n bool takeFee = true;\n\n //if any account belongs to isExcludedFromFee account then remove the fee\n if (isExcludedFromFee[_from] || isExcludedFromFee[_to] || !feesStatus) {\n // note: the transferhelper contract is excluded from fees by default\n takeFee = false;\n }\n\n _tokenTransfer(_from, _to, _amount, takeFee);\n }\n\n function _tokenTransfer(address _from, address _to, uint256 _amount, bool takeFee) private {\n unchecked {\n if (registeredSwapContract[_from] && takeFee) {\n // the user is buying - buy tax is applied\n uint256 allFee_;\n uint256 tTransferAmount_;\n allFee_ = totalBuyFeePerTx(_amount);\n tTransferAmount_ = _amount - allFee_;\n\n uint256 fromBalance_ = _balances[_from];\n\n if (fromBalance_ < _amount) {\n revert ERC20InsufficientBalance(_from, fromBalance_, _amount);\n }\n\n // Overflow not possible: value <= fromBalance <= totalSupply.\n _balances[_from] = fromBalance_ - _amount;\n _balances[_to] += tTransferAmount_;\n\n emit Transfer(_from, _to, tTransferAmount_);\n\n _takeTokenFee(_from, allFee_);\n } else if (registeredSwapContract[_to] && takeFee) {\n // the user is selling - sell tax is applied\n uint256 allFee_ = totalSellFeePerTx(_amount);\n uint256 tTransferAmount_ = _amount - allFee_;\n\n uint256 fromBalance_ = _balances[_from];\n\n if (fromBalance_ < _amount) {\n revert ERC20InsufficientBalance(_from, fromBalance_, _amount);\n }\n\n // Overflow not possible: value <= fromBalance <= totalSupply.\n _balances[_from] = fromBalance_ - _amount;\n _balances[_to] += tTransferAmount_;\n\n emit Transfer(_from, _to, tTransferAmount_);\n\n _takeTokenFee(_from, allFee_);\n } else {\n // the user is transfering - no tax is applied\n uint256 fromBalance_ = _balances[_from];\n\n if (fromBalance_ < _amount) {\n revert ERC20InsufficientBalance(_from, fromBalance_, _amount);\n }\n\n // Overflow not possible: value <= fromBalance <= totalSupply.\n _balances[_from] = fromBalance_ - _amount;\n _balances[_to] += _amount;\n\n emit Transfer(_from, _to, _amount);\n }\n }\n }\n\n function _distributeAndLiquify() private {\n uint256 contractTokenBalance_ = balanceOf(address(this));\n\n if (contractTokenBalance_ >= minSwapAmount && !swapping) {\n swapping = true;\n\n _transfer(address(this), address(swapHelper), contractTokenBalance_);\n\n swapHelper.swapTokenForETH(contractTokenBalance_, 0);\n\n swapping = false;\n }\n }\n\n function _takeTokenFee(address _from, uint256 _amount) private {\n unchecked {\n _balances[address(this)] += _amount;\n }\n emit Transfer(_from, address(this), _amount);\n }\n\n // Minting and burning functions\n\n function mint(address _to, uint256 _amount) external onlyMinter {\n require(totalSupply() + _amount <= maximumSupply, \"USAToken: Max supply reached\");\n _mint(_to, _amount);\n }\n\n function burn(address _from, uint256 _amount) external onlyMinter {\n _burn(_from, _amount);\n }\n\n function manualSwap() external onlyOwner {\n uint256 contractTokenBalance_ = balanceOf(address(this));\n _transfer(address(this), address(swapHelper), contractTokenBalance_);\n swapHelper.swapTokenForETH(contractTokenBalance_, 0);\n }\n\n function withdrawTokens(address _token, address _to, uint256 _amount) external onlyOwner {\n IERC20(_token).transfer(_to, _amount);\n emit WithdrawTokens(_token, _to, _amount);\n }\n\n // Configuration functions\n\n function addRegisteredSwapContract(address _swapContract, bool _setting) external onlyOwner {\n registeredSwapContract[_swapContract] = _setting;\n emit RegisteredSwapContract(_swapContract, _setting);\n }\n\n function blacklistAddress(address account, bool value) external onlyOwner {\n _isBlacklisted[account] = value;\n emit BlacklistAddress(account, value);\n }\n\n function addMinter(address _minter) external onlyOwner {\n approvedMinter[_minter] = true;\n emit MinterAdded(_minter);\n }\n\n function removeMinter(address _minter) external onlyOwner {\n approvedMinter[_minter] = false;\n emit MinterRemoved(_minter);\n }\n\n function setMinSwapAmount(uint256 _minSwapAmount) external onlyOwner {\n minSwapAmount = _minSwapAmount;\n emit MinSwapAmountChanged(_minSwapAmount);\n }\n\n function setExcludedFromFee(address _address, bool _excluded) external onlyOwner {\n isExcludedFromFee[_address] = _excluded;\n emit ExcludedFromFeeChanged(_address, _excluded);\n }\n\n function setTaxFeeOnBuy(uint256 _taxFeeOnBuy) external onlyOwner {\n require(_taxFeeOnBuy <= 5 * 1e7, \"USAToken: Tax fee on buy must be less than 50%\");\n taxFeeOnBuy = _taxFeeOnBuy;\n emit TaxFeeOnBuyChanged(_taxFeeOnBuy);\n }\n\n function setTaxFeeOnSell(uint256 _taxFeeOnSell) external onlyOwner {\n require(_taxFeeOnSell <= 5 * 1e7, \"USAToken: Tax fee on sell must be less than 50%\");\n taxFeeOnSell = _taxFeeOnSell;\n emit TaxFeeOnSellChanged(_taxFeeOnSell);\n }\n\n function setSwapToEthOnSell(bool _swapToEthOnSell) external onlyOwner {\n swapToEthOnSell = _swapToEthOnSell;\n emit SwapToEthOnSellChanged(_swapToEthOnSell);\n }\n\n function setDaoTaxReceiver(address _daoTaxReceiver) external onlyOwner {\n daoTaxReceiver = _daoTaxReceiver;\n emit DaoTaxReceiverChanged(_daoTaxReceiver);\n }\n\n function changeSwapHelper(address _swapHelper) external onlyOwner {\n swapHelper = ITokenSwapHelper(_swapHelper);\n isExcludedFromFee[_swapHelper] = true;\n emit SwapHelperChanged(_swapHelper);\n }\n\n function enableOrDisableFees(bool _value) external onlyOwner {\n // Check if the new value is different _from the current state\n require(_value != feesStatus, \"Value must be different _from current state\");\n feesStatus = _value;\n emit FeeStatus(_value);\n }\n\n // View functions\n\n function isRegisteredSwapContract(address _swapContract) external view returns (bool) {\n return registeredSwapContract[_swapContract];\n }\n\n function totalBuyFeePerTx(uint256 _amount) public view returns (uint256 fee_) {\n fee_ = (_amount * taxFeeOnBuy) / percentDivider;\n }\n\n function totalSellFeePerTx(uint256 _amount) public view returns (uint256 fee_) {\n fee_ = (_amount * taxFeeOnSell) / percentDivider;\n }\n\n //to receive ETH from dexRouter when swapping\n receive() external payable {}\n}\n" }, "src/Ownable.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)\n\npragma solidity ^0.8.20;\n\nimport {Context} from \"./Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * The initial owner is set to the address provided by the deployer. This can\n * later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n /**\n * @dev The caller account is not authorized to perform an operation.\n */\n error OwnableUnauthorizedAccount(address account);\n\n /**\n * @dev The owner is not a valid owner account. (eg. `address(0)`)\n */\n error OwnableInvalidOwner(address owner);\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the address provided by the deployer as the initial owner.\n */\n constructor(address initialOwner) {\n if (initialOwner == address(0)) {\n revert OwnableInvalidOwner(address(0));\n }\n _transferOwnership(initialOwner);\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n if (owner() != _msgSender()) {\n revert OwnableUnauthorizedAccount(_msgSender());\n }\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby disabling any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n if (newOwner == address(0)) {\n revert OwnableInvalidOwner(address(0));\n }\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n}\n" }, "src/ERC20Permit.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/ERC20Permit.sol)\n\npragma solidity ^0.8.20;\n\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n *\n * ==== Security Considerations\n *\n * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature\n * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be\n * considered as an intention to spend the allowance in any specific way. The second is that because permits have\n * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should\n * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be\n * generally recommended is:\n *\n * ```solidity\n * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {\n * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}\n * doThing(..., value);\n * }\n *\n * function doThing(..., uint256 value) public {\n * token.safeTransferFrom(msg.sender, address(this), value);\n * ...\n * }\n * ```\n *\n * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of\n * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also\n * {SafeERC20-safeTransferFrom}).\n *\n * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so\n * contracts should have entry points that don't rely on permit.\n */\ninterface IERC20Permit {\n /**\n * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n * given ``owner``'s signed approval.\n *\n * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n * ordering also apply here.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `deadline` must be a timestamp in the future.\n * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n * over the EIP712-formatted function arguments.\n * - the signature must use ``owner``'s current nonce (see {nonces}).\n *\n * For more information on the signature format, see the\n * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n * section].\n *\n * CAUTION: See Security Considerations above.\n */\n function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s)\n external;\n\n /**\n * @dev Returns the current nonce for `owner`. This value must be\n * included whenever a signature is generated for {permit}.\n *\n * Every successful call to {permit} increases ``owner``'s nonce by one. This\n * prevents a signature from being used multiple times.\n */\n function nonces(address owner) external view returns (uint256);\n\n /**\n * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n */\n // solhint-disable-next-line func-name-mixedcase\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\n\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n */\ninterface IERC20Metadata is IERC20 {\n /**\n * @dev Returns the name of the token.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the symbol of the token.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the decimals places of the token.\n */\n function decimals() external view returns (uint8);\n}\n\nimport {Context} from \"./Context.sol\";\n\n// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)\n\n/**\n * @dev Standard ERC20 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.\n */\ninterface IERC20Errors {\n /**\n * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.\n * @param sender Address whose tokens are being transferred.\n * @param balance Current balance for the interacting account.\n * @param needed Minimum amount required to perform a transfer.\n */\n error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);\n\n /**\n * @dev Indicates a failure with the token `sender`. Used in transfers.\n * @param sender Address whose tokens are being transferred.\n */\n error ERC20InvalidSender(address sender);\n\n /**\n * @dev Indicates a failure with the token `receiver`. Used in transfers.\n * @param receiver Address to which tokens are being transferred.\n */\n error ERC20InvalidReceiver(address receiver);\n\n /**\n * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.\n * @param spender Address that may be allowed to operate on tokens without being their owner.\n * @param allowance Amount of tokens a `spender` is allowed to operate with.\n * @param needed Minimum amount required to perform a transfer.\n */\n error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);\n\n /**\n * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n * @param approver Address initiating an approval operation.\n */\n error ERC20InvalidApprover(address approver);\n\n /**\n * @dev Indicates a failure with the `spender` to be approved. Used in approvals.\n * @param spender Address that may be allowed to operate on tokens without being their owner.\n */\n error ERC20InvalidSpender(address spender);\n}\n\n/**\n * @dev Standard ERC721 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.\n */\ninterface IERC721Errors {\n /**\n * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.\n * Used in balance queries.\n * @param owner Address of the current owner of a token.\n */\n error ERC721InvalidOwner(address owner);\n\n /**\n * @dev Indicates a `tokenId` whose `owner` is the zero address.\n * @param tokenId Identifier number of a token.\n */\n error ERC721NonexistentToken(uint256 tokenId);\n\n /**\n * @dev Indicates an error related to the ownership over a particular token. Used in transfers.\n * @param sender Address whose tokens are being transferred.\n * @param tokenId Identifier number of a token.\n * @param owner Address of the current owner of a token.\n */\n error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);\n\n /**\n * @dev Indicates a failure with the token `sender`. Used in transfers.\n * @param sender Address whose tokens are being transferred.\n */\n error ERC721InvalidSender(address sender);\n\n /**\n * @dev Indicates a failure with the token `receiver`. Used in transfers.\n * @param receiver Address to which tokens are being transferred.\n */\n error ERC721InvalidReceiver(address receiver);\n\n /**\n * @dev Indicates a failure with the `operator`’s approval. Used in transfers.\n * @param operator Address that may be allowed to operate on tokens without being their owner.\n * @param tokenId Identifier number of a token.\n */\n error ERC721InsufficientApproval(address operator, uint256 tokenId);\n\n /**\n * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n * @param approver Address initiating an approval operation.\n */\n error ERC721InvalidApprover(address approver);\n\n /**\n * @dev Indicates a failure with the `operator` to be approved. Used in approvals.\n * @param operator Address that may be allowed to operate on tokens without being their owner.\n */\n error ERC721InvalidOperator(address operator);\n}\n\n/**\n * @dev Standard ERC1155 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.\n */\ninterface IERC1155Errors {\n /**\n * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.\n * @param sender Address whose tokens are being transferred.\n * @param balance Current balance for the interacting account.\n * @param needed Minimum amount required to perform a transfer.\n * @param tokenId Identifier number of a token.\n */\n error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);\n\n /**\n * @dev Indicates a failure with the token `sender`. Used in transfers.\n * @param sender Address whose tokens are being transferred.\n */\n error ERC1155InvalidSender(address sender);\n\n /**\n * @dev Indicates a failure with the token `receiver`. Used in transfers.\n * @param receiver Address to which tokens are being transferred.\n */\n error ERC1155InvalidReceiver(address receiver);\n\n /**\n * @dev Indicates a failure with the `operator`’s approval. Used in transfers.\n * @param operator Address that may be allowed to operate on tokens without being their owner.\n * @param owner Address of the current owner of a token.\n */\n error ERC1155MissingApprovalForAll(address operator, address owner);\n\n /**\n * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.\n * @param approver Address initiating an approval operation.\n */\n error ERC1155InvalidApprover(address approver);\n\n /**\n * @dev Indicates a failure with the `operator` to be approved. Used in approvals.\n * @param operator Address that may be allowed to operate on tokens without being their owner.\n */\n error ERC1155InvalidOperator(address operator);\n\n /**\n * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.\n * Used in batch transfers.\n * @param idsLength Length of the array of token identifiers\n * @param valuesLength Length of the array of token amounts\n */\n error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);\n}\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * The default value of {decimals} is 18. To change this, you should override\n * this function so it returns a different value.\n *\n * We have followed general OpenZeppelin Contracts guidelines: functions revert\n * instead returning `false` on failure. This behavior is nonetheless\n * conventional and does not conflict with the expectations of ERC20\n * applications.\n *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n */\nabstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {\n mapping(address account => uint256) internal _balances;\n\n mapping(address account => mapping(address spender => uint256)) internal _allowances;\n\n uint256 private _totalSupply;\n\n string private _name;\n string private _symbol;\n\n /**\n * @dev Sets the values for {name} and {symbol}.\n *\n * All two of these values are immutable: they can only be set once during\n * construction.\n */\n constructor(string memory name_, string memory symbol_) {\n _name = name_;\n _symbol = symbol_;\n }\n\n /**\n * @dev Returns the name of the token.\n */\n function name() public view virtual returns (string memory) {\n return _name;\n }\n\n /**\n * @dev Returns the symbol of the token, usually a shorter version of the\n * name.\n */\n function symbol() public view virtual returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev Returns the number of decimals used to get its user representation.\n * For example, if `decimals` equals `2`, a balance of `505` tokens should\n * be displayed to a user as `5.05` (`505 / 10 ** 2`).\n *\n * Tokens usually opt for a value of 18, imitating the relationship between\n * Ether and Wei. This is the default value returned by this function, unless\n * it's overridden.\n *\n * NOTE: This information is only used for _display_ purposes: it in\n * no way affects any of the arithmetic of the contract, including\n * {IERC20-balanceOf} and {IERC20-transfer}.\n */\n function decimals() public view virtual returns (uint8) {\n return 18;\n }\n\n /**\n * @dev See {IERC20-totalSupply}.\n */\n function totalSupply() public view virtual returns (uint256) {\n return _totalSupply;\n }\n\n /**\n * @dev See {IERC20-balanceOf}.\n */\n function balanceOf(address account) public view virtual returns (uint256) {\n return _balances[account];\n }\n\n /**\n * @dev See {IERC20-transfer}.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - the caller must have a balance of at least `value`.\n */\n function transfer(address to, uint256 value) public virtual returns (bool) {\n address owner = _msgSender();\n _transfer(owner, to, value);\n return true;\n }\n\n /**\n * @dev See {IERC20-allowance}.\n */\n function allowance(address owner, address spender) public view virtual returns (uint256) {\n return _allowances[owner][spender];\n }\n\n /**\n * @dev See {IERC20-approve}.\n *\n * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on\n * `transferFrom`. This is semantically equivalent to an infinite approval.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 value) public virtual returns (bool) {\n address owner = _msgSender();\n _approve(owner, spender, value);\n return true;\n }\n\n /**\n * @dev See {IERC20-transferFrom}.\n *\n * Emits an {Approval} event indicating the updated allowance. This is not\n * required by the EIP. See the note at the beginning of {ERC20}.\n *\n * NOTE: Does not update the allowance if the current allowance\n * is the maximum `uint256`.\n *\n * Requirements:\n *\n * - `from` and `to` cannot be the zero address.\n * - `from` must have a balance of at least `value`.\n * - the caller must have allowance for ``from``'s tokens of at least\n * `value`.\n */\n function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {\n address spender = _msgSender();\n _spendAllowance(from, spender, value);\n _transfer(from, to, value);\n return true;\n }\n\n /**\n * @dev Moves a `value` amount of tokens from `from` to `to`.\n *\n * This internal function is equivalent to {transfer}, and can be used to\n * e.g. implement automatic token fees, slashing mechanisms, etc.\n *\n * Emits a {Transfer} event.\n *\n * NOTE: This function is not virtual, {_update} should be overridden instead.\n */\n function _transfer(address from, address to, uint256 value) internal virtual {\n if (from == address(0)) {\n revert ERC20InvalidSender(address(0));\n }\n if (to == address(0)) {\n revert ERC20InvalidReceiver(address(0));\n }\n _update(from, to, value);\n }\n\n /**\n * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from`\n * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding\n * this function.\n *\n * Emits a {Transfer} event.\n */\n function _update(address from, address to, uint256 value) internal virtual {\n if (from == address(0)) {\n // Overflow check required: The rest of the code assumes that totalSupply never overflows\n _totalSupply += value;\n } else {\n uint256 fromBalance = _balances[from];\n if (fromBalance < value) {\n revert ERC20InsufficientBalance(from, fromBalance, value);\n }\n unchecked {\n // Overflow not possible: value <= fromBalance <= totalSupply.\n _balances[from] = fromBalance - value;\n }\n }\n\n if (to == address(0)) {\n unchecked {\n // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply.\n _totalSupply -= value;\n }\n } else {\n unchecked {\n // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.\n _balances[to] += value;\n }\n }\n\n emit Transfer(from, to, value);\n }\n\n /**\n * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0).\n * Relies on the `_update` mechanism\n *\n * Emits a {Transfer} event with `from` set to the zero address.\n *\n * NOTE: This function is not virtual, {_update} should be overridden instead.\n */\n function _mint(address account, uint256 value) internal {\n if (account == address(0)) {\n revert ERC20InvalidReceiver(address(0));\n }\n _update(address(0), account, value);\n }\n\n /**\n * @dev Destroys a `value` amount of tokens from `account`, lowering the total supply.\n * Relies on the `_update` mechanism.\n *\n * Emits a {Transfer} event with `to` set to the zero address.\n *\n * NOTE: This function is not virtual, {_update} should be overridden instead\n */\n function _burn(address account, uint256 value) internal {\n if (account == address(0)) {\n revert ERC20InvalidSender(address(0));\n }\n _update(account, address(0), value);\n }\n\n /**\n * @dev Sets `value` as the allowance of `spender` over the `owner` s tokens.\n *\n * This internal function is equivalent to `approve`, and can be used to\n * e.g. set automatic allowances for certain subsystems, etc.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `owner` cannot be the zero address.\n * - `spender` cannot be the zero address.\n *\n * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.\n */\n function _approve(address owner, address spender, uint256 value) internal {\n _approve(owner, spender, value, true);\n }\n\n /**\n * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event.\n *\n * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by\n * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any\n * `Approval` event during `transferFrom` operations.\n *\n * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to\n * true using the following override:\n * ```\n * function _approve(address owner, address spender, uint256 value, bool) internal virtual override {\n * super._approve(owner, spender, value, true);\n * }\n * ```\n *\n * Requirements are the same as {_approve}.\n */\n function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {\n if (owner == address(0)) {\n revert ERC20InvalidApprover(address(0));\n }\n if (spender == address(0)) {\n revert ERC20InvalidSpender(address(0));\n }\n _allowances[owner][spender] = value;\n if (emitEvent) {\n emit Approval(owner, spender, value);\n }\n }\n\n /**\n * @dev Updates `owner` s allowance for `spender` based on spent `value`.\n *\n * Does not update the allowance value in case of infinite allowance.\n * Revert if not enough allowance is available.\n *\n * Does not emit an {Approval} event.\n */\n function _spendAllowance(address owner, address spender, uint256 value) internal virtual {\n uint256 currentAllowance = allowance(owner, spender);\n if (currentAllowance != type(uint256).max) {\n if (currentAllowance < value) {\n revert ERC20InsufficientAllowance(spender, currentAllowance, value);\n }\n unchecked {\n _approve(owner, spender, currentAllowance - value, false);\n }\n }\n }\n}\n\nimport \"@openzeppelin/contracts/utils/cryptography/ECDSA.sol\";\n\nimport \"@openzeppelin/contracts/utils/math/Math.sol\";\n\nimport \"@openzeppelin/contracts/utils/math/SignedMath.sol\";\n\nimport \"@openzeppelin/contracts/utils/Strings.sol\";\n\nimport \"@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol\";\n\nimport \"@openzeppelin/contracts/utils/StorageSlot.sol\";\n\n// | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |\n// | length | 0x BB |\ntype ShortString is bytes32;\n\n/**\n * @dev This library provides functions to convert short memory strings\n * into a `ShortString` type that can be used as an immutable variable.\n *\n * Strings of arbitrary length can be optimized using this library if\n * they are short enough (up to 31 bytes) by packing them with their\n * length (1 byte) in a single EVM word (32 bytes). Additionally, a\n * fallback mechanism can be used for every other case.\n *\n * Usage example:\n *\n * ```solidity\n * contract Named {\n * using ShortStrings for *;\n *\n * ShortString private immutable _name;\n * string private _nameFallback;\n *\n * constructor(string memory contractName) {\n * _name = contractName.toShortStringWithFallback(_nameFallback);\n * }\n *\n * function name() external view returns (string memory) {\n * return _name.toStringWithFallback(_nameFallback);\n * }\n * }\n * ```\n */\nlibrary ShortStrings {\n // Used as an identifier for strings longer than 31 bytes.\n bytes32 private constant FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF;\n\n error StringTooLong(string str);\n error InvalidShortString();\n\n /**\n * @dev Encode a string of at most 31 chars into a `ShortString`.\n *\n * This will trigger a `StringTooLong` error is the input string is too long.\n */\n function toShortString(string memory str) internal pure returns (ShortString) {\n bytes memory bstr = bytes(str);\n if (bstr.length > 31) {\n revert StringTooLong(str);\n }\n return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length));\n }\n\n /**\n * @dev Decode a `ShortString` back to a \"normal\" string.\n */\n function toString(ShortString sstr) internal pure returns (string memory) {\n uint256 len = byteLength(sstr);\n // using `new string(len)` would work locally but is not memory safe.\n string memory str = new string(32);\n /// @solidity memory-safe-assembly\n assembly {\n mstore(str, len)\n mstore(add(str, 0x20), sstr)\n }\n return str;\n }\n\n /**\n * @dev Return the length of a `ShortString`.\n */\n function byteLength(ShortString sstr) internal pure returns (uint256) {\n uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF;\n if (result > 31) {\n revert InvalidShortString();\n }\n return result;\n }\n\n /**\n * @dev Encode a string into a `ShortString`, or write it to storage if it is too long.\n */\n function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) {\n if (bytes(value).length < 32) {\n return toShortString(value);\n } else {\n StorageSlot.getStringSlot(store).value = value;\n return ShortString.wrap(FALLBACK_SENTINEL);\n }\n }\n\n /**\n * @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}.\n */\n function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) {\n if (ShortString.unwrap(value) != FALLBACK_SENTINEL) {\n return toString(value);\n } else {\n return store;\n }\n }\n\n /**\n * @dev Return the length of a string that was encoded to `ShortString` or written to storage using\n * {setWithFallback}.\n *\n * WARNING: This will return the \"byte length\" of the string. This may not reflect the actual length in terms of\n * actual characters as the UTF-8 encoding of a single character can span over multiple bytes.\n */\n function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) {\n if (ShortString.unwrap(value) != FALLBACK_SENTINEL) {\n return byteLength(value);\n } else {\n return bytes(store).length;\n }\n }\n}\n\n// import \"@openzeppelin/contracts/utils/ShortStrings.sol\";\n\n// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol)\n\ninterface IERC5267 {\n /**\n * @dev MAY be emitted to signal that the domain could have changed.\n */\n event EIP712DomainChanged();\n\n /**\n * @dev returns the fields and values that describe the domain separator used by this contract for EIP-712\n * signature.\n */\n function eip712Domain()\n external\n view\n returns (\n bytes1 fields,\n string memory name,\n string memory version,\n uint256 chainId,\n address verifyingContract,\n bytes32 salt,\n uint256[] memory extensions\n );\n}\n\n/**\n * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.\n *\n * The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose\n * encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract\n * does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to\n * produce the hash of their typed data using a combination of `abi.encode` and `keccak256`.\n *\n * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding\n * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA\n * ({_hashTypedDataV4}).\n *\n * The implementation of the domain separator was designed to be as efficient as possible while still properly updating\n * the chain id to protect against replay attacks on an eventual fork of the chain.\n *\n * NOTE: This contract implements the version of the encoding known as \"v4\", as implemented by the JSON RPC method\n * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].\n *\n * NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain\n * separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the\n * separator from the immutable values, which is cheaper than accessing a cached version in cold storage.\n *\n * @custom:oz-upgrades-unsafe-allow state-variable-immutable\n */\nabstract contract EIP712 is IERC5267 {\n using ShortStrings for *;\n\n bytes32 private constant TYPE_HASH =\n keccak256(\"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\");\n\n // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to\n // invalidate the cached domain separator if the chain id changes.\n bytes32 private immutable _cachedDomainSeparator;\n uint256 private immutable _cachedChainId;\n address private immutable _cachedThis;\n\n bytes32 private immutable _hashedName;\n bytes32 private immutable _hashedVersion;\n\n ShortString private immutable _name;\n ShortString private immutable _version;\n string private _nameFallback;\n string private _versionFallback;\n\n /**\n * @dev Initializes the domain separator and parameter caches.\n *\n * The meaning of `name` and `version` is specified in\n * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:\n *\n * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.\n * - `version`: the current major version of the signing domain.\n *\n * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart\n * contract upgrade].\n */\n constructor(string memory name, string memory version) {\n _name = name.toShortStringWithFallback(_nameFallback);\n _version = version.toShortStringWithFallback(_versionFallback);\n _hashedName = keccak256(bytes(name));\n _hashedVersion = keccak256(bytes(version));\n\n _cachedChainId = block.chainid;\n _cachedDomainSeparator = _buildDomainSeparator();\n _cachedThis = address(this);\n }\n\n /**\n * @dev Returns the domain separator for the current chain.\n */\n function _domainSeparatorV4() internal view returns (bytes32) {\n if (address(this) == _cachedThis && block.chainid == _cachedChainId) {\n return _cachedDomainSeparator;\n } else {\n return _buildDomainSeparator();\n }\n }\n\n function _buildDomainSeparator() private view returns (bytes32) {\n return keccak256(abi.encode(TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this)));\n }\n\n /**\n * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this\n * function returns the hash of the fully encoded EIP712 message for this domain.\n *\n * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:\n *\n * ```solidity\n * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(\n * keccak256(\"Mail(address to,string contents)\"),\n * mailTo,\n * keccak256(bytes(mailContents))\n * )));\n * address signer = ECDSA.recover(digest, signature);\n * ```\n */\n function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {\n return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash);\n }\n\n /**\n * @dev See {IERC-5267}.\n */\n function eip712Domain()\n public\n view\n virtual\n returns (\n bytes1 fields,\n string memory name,\n string memory version,\n uint256 chainId,\n address verifyingContract,\n bytes32 salt,\n uint256[] memory extensions\n )\n {\n return (\n hex\"0f\", // 01111\n _EIP712Name(),\n _EIP712Version(),\n block.chainid,\n address(this),\n bytes32(0),\n new uint256[](0)\n );\n }\n\n /**\n * @dev The name parameter for the EIP712 domain.\n *\n * NOTE: By default this function reads _name which is an immutable value.\n * It only reads from storage if necessary (in case the value is too large to fit in a ShortString).\n */\n // solhint-disable-next-line func-name-mixedcase\n function _EIP712Name() internal view returns (string memory) {\n return _name.toStringWithFallback(_nameFallback);\n }\n\n /**\n * @dev The version parameter for the EIP712 domain.\n *\n * NOTE: By default this function reads _version which is an immutable value.\n * It only reads from storage if necessary (in case the value is too large to fit in a ShortString).\n */\n // solhint-disable-next-line func-name-mixedcase\n function _EIP712Version() internal view returns (string memory) {\n return _version.toStringWithFallback(_versionFallback);\n }\n}\n\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/Nonces.sol)\n\n/**\n * @dev Provides tracking nonces for addresses. Nonces will only increment.\n */\nabstract contract Nonces {\n /**\n * @dev The nonce used for an `account` is not the expected current nonce.\n */\n error InvalidAccountNonce(address account, uint256 currentNonce);\n\n mapping(address account => uint256) private _nonces;\n\n /**\n * @dev Returns the next unused nonce for an address.\n */\n function nonces(address owner) public view virtual returns (uint256) {\n return _nonces[owner];\n }\n\n /**\n * @dev Consumes a nonce.\n *\n * Returns the current value and increments nonce.\n */\n function _useNonce(address owner) internal virtual returns (uint256) {\n // For each account, the nonce has an initial value of 0, can only be incremented by one, and cannot be\n // decremented or reset. This guarantees that the nonce never overflows.\n unchecked {\n // It is important to do x++ and not ++x here.\n return _nonces[owner]++;\n }\n }\n\n /**\n * @dev Same as {_useNonce} but checking that `nonce` is the next valid for `owner`.\n */\n function _useCheckedNonce(address owner, uint256 nonce) internal virtual {\n uint256 current = _useNonce(owner);\n if (nonce != current) {\n revert InvalidAccountNonce(owner, current);\n }\n }\n}\n\n/**\n * @dev Implementation of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on `{IERC20-approve}`, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n */\nabstract contract ERC20Permit is ERC20, IERC20Permit, EIP712, Nonces {\n bytes32 private constant PERMIT_TYPEHASH =\n keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n\n /**\n * @dev Permit deadline has expired.\n */\n error ERC2612ExpiredSignature(uint256 deadline);\n\n /**\n * @dev Mismatched signature.\n */\n error ERC2612InvalidSigner(address signer, address owner);\n\n /**\n * @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `\"1\"`.\n *\n * It's a good idea to use the same `name` that is defined as the ERC20 token name.\n */\n constructor(string memory name) EIP712(name, \"1\") {}\n\n /**\n * @inheritdoc IERC20Permit\n */\n function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s)\n public\n virtual\n {\n if (block.timestamp > deadline) {\n revert ERC2612ExpiredSignature(deadline);\n }\n\n bytes32 structHash = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));\n\n bytes32 hash = _hashTypedDataV4(structHash);\n\n address signer = ECDSA.recover(hash, v, r, s);\n if (signer != owner) {\n revert ERC2612InvalidSigner(signer, owner);\n }\n\n _approve(owner, spender, value);\n }\n\n /**\n * @inheritdoc IERC20Permit\n */\n function nonces(address owner) public view virtual override(IERC20Permit, Nonces) returns (uint256) {\n return super.nonces(owner);\n }\n\n /**\n * @inheritdoc IERC20Permit\n */\n // solhint-disable-next-line func-name-mixedcase\n function DOMAIN_SEPARATOR() external view virtual returns (bytes32) {\n return _domainSeparatorV4();\n }\n}\n" }, "src/interfaces/IUSAToken.sol": { "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0 <0.9.0;\n\ninterface IUSAToken {\n event WithdrawTokens(address indexed token, address indexed to, uint256 amount);\n event MinterRemoved(address indexed minter);\n event MinterAdded(address _minter);\n event TaxFeeOnBuyChanged(uint256 taxFeeOnBuy);\n event TaxFeeOnSellChanged(uint256 taxFeeOnSell);\n event DaoTaxReceiverChanged(address _daoTaxReceiver);\n event FeeStatus(bool _value);\n event SwapToEthOnSellChanged(bool swapToEthOnSell);\n event ExcludedFromFeeChanged(address indexed _address, bool _excluded);\n event MinSwapAmountChanged(uint256 _minSwapAmount);\n event SwapHelperChanged(address _swapRouter);\n event RegisteredSwapContract(address indexed _swapContract, bool _setting);\n event PoolFeeChanged(uint24 _poolFee);\n event BlacklistAddress(address indexed account, bool value);\n}\n" }, "src/interfaces/ITokenSwapHelper.sol": { "content": "// SPDX-License-Identifier: MIT\npragma solidity >=0.8.0 <0.9.0;\n\ninterface ITokenSwapHelper {\n function swapTokenForETH(uint256 amountIn, uint256 amountOutMin) external;\n}\n" }, "src/Context.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/Context.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n}\n" }, "lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the value of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the value of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves a `value` amount of tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 value) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets a `value` amount of tokens as the allowance of `spender` over the\n * caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 value) external returns (bool);\n\n /**\n * @dev Moves a `value` amount of tokens from `from` to `to` using the\n * allowance mechanism. `value` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(address from, address to, uint256 value) external returns (bool);\n}\n" }, "lib/openzeppelin-contracts/contracts/utils/cryptography/ECDSA.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/ECDSA.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.\n *\n * These functions can be used to verify that a message was signed by the holder\n * of the private keys of a given address.\n */\nlibrary ECDSA {\n enum RecoverError {\n NoError,\n InvalidSignature,\n InvalidSignatureLength,\n InvalidSignatureS\n }\n\n /**\n * @dev The signature derives the `address(0)`.\n */\n error ECDSAInvalidSignature();\n\n /**\n * @dev The signature has an invalid length.\n */\n error ECDSAInvalidSignatureLength(uint256 length);\n\n /**\n * @dev The signature has an S value that is in the upper half order.\n */\n error ECDSAInvalidSignatureS(bytes32 s);\n\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not\n * return address(0) without also returning an error description. Errors are documented using an enum (error type)\n * and a bytes32 providing additional information about the error.\n *\n * If no error is returned, then the address can be used for verification purposes.\n *\n * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise\n * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.\n *\n * Documentation for signature generation:\n * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]\n * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]\n */\n function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError, bytes32) {\n if (signature.length == 65) {\n bytes32 r;\n bytes32 s;\n uint8 v;\n // ecrecover takes the signature parameters, and the only way to get them\n // currently is to use assembly.\n /// @solidity memory-safe-assembly\n assembly {\n r := mload(add(signature, 0x20))\n s := mload(add(signature, 0x40))\n v := byte(0, mload(add(signature, 0x60)))\n }\n return tryRecover(hash, v, r, s);\n } else {\n return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length));\n }\n }\n\n /**\n * @dev Returns the address that signed a hashed message (`hash`) with\n * `signature`. This address can then be used for verification purposes.\n *\n * The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:\n * this function rejects them by requiring the `s` value to be in the lower\n * half order, and the `v` value to be either 27 or 28.\n *\n * IMPORTANT: `hash` _must_ be the result of a hash operation for the\n * verification to be secure: it is possible to craft signatures that\n * recover to arbitrary addresses for non-hashed data. A safe way to ensure\n * this is by receiving a hash of the original message (which may otherwise\n * be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.\n */\n function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {\n (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature);\n _throwError(error, errorArg);\n return recovered;\n }\n\n /**\n * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.\n *\n * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]\n */\n function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) {\n unchecked {\n bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);\n // We do not check for an overflow here since the shift operation results in 0 or 1.\n uint8 v = uint8((uint256(vs) >> 255) + 27);\n return tryRecover(hash, v, r, s);\n }\n }\n\n /**\n * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.\n */\n function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {\n (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs);\n _throwError(error, errorArg);\n return recovered;\n }\n\n /**\n * @dev Overload of {ECDSA-tryRecover} that receives the `v`,\n * `r` and `s` signature fields separately.\n */\n function tryRecover(\n bytes32 hash,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal pure returns (address, RecoverError, bytes32) {\n // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature\n // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines\n // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most\n // signatures from current libraries generate a unique signature with an s-value in the lower half order.\n //\n // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value\n // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or\n // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept\n // these malleable signatures as well.\n if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {\n return (address(0), RecoverError.InvalidSignatureS, s);\n }\n\n // If the signature is valid (and not malleable), return the signer address\n address signer = ecrecover(hash, v, r, s);\n if (signer == address(0)) {\n return (address(0), RecoverError.InvalidSignature, bytes32(0));\n }\n\n return (signer, RecoverError.NoError, bytes32(0));\n }\n\n /**\n * @dev Overload of {ECDSA-recover} that receives the `v`,\n * `r` and `s` signature fields separately.\n */\n function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {\n (address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s);\n _throwError(error, errorArg);\n return recovered;\n }\n\n /**\n * @dev Optionally reverts with the corresponding custom error according to the `error` argument provided.\n */\n function _throwError(RecoverError error, bytes32 errorArg) private pure {\n if (error == RecoverError.NoError) {\n return; // no error: do nothing\n } else if (error == RecoverError.InvalidSignature) {\n revert ECDSAInvalidSignature();\n } else if (error == RecoverError.InvalidSignatureLength) {\n revert ECDSAInvalidSignatureLength(uint256(errorArg));\n } else if (error == RecoverError.InvalidSignatureS) {\n revert ECDSAInvalidSignatureS(errorArg);\n }\n }\n}\n" }, "lib/openzeppelin-contracts/contracts/utils/math/Math.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary Math {\n /**\n * @dev Muldiv operation overflow.\n */\n error MathOverflowedMulDiv();\n\n enum Rounding {\n Floor, // Toward negative infinity\n Ceil, // Toward positive infinity\n Trunc, // Toward zero\n Expand // Away from zero\n }\n\n /**\n * @dev Returns the addition of two unsigned integers, with an overflow flag.\n */\n function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n uint256 c = a + b;\n if (c < a) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, with an overflow flag.\n */\n function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b > a) return (false, 0);\n return (true, a - b);\n }\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n */\n function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n if (a == 0) return (true, 0);\n uint256 c = a * b;\n if (c / a != b) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the division of two unsigned integers, with a division by zero flag.\n */\n function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a / b);\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n */\n function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a % b);\n }\n }\n\n /**\n * @dev Returns the largest of two numbers.\n */\n function max(uint256 a, uint256 b) internal pure returns (uint256) {\n return a > b ? a : b;\n }\n\n /**\n * @dev Returns the smallest of two numbers.\n */\n function min(uint256 a, uint256 b) internal pure returns (uint256) {\n return a < b ? a : b;\n }\n\n /**\n * @dev Returns the average of two numbers. The result is rounded towards\n * zero.\n */\n function average(uint256 a, uint256 b) internal pure returns (uint256) {\n // (a + b) / 2 can overflow.\n return (a & b) + (a ^ b) / 2;\n }\n\n /**\n * @dev Returns the ceiling of the division of two numbers.\n *\n * This differs from standard division with `/` in that it rounds towards infinity instead\n * of rounding towards zero.\n */\n function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\n if (b == 0) {\n // Guarantee the same behavior as in a regular Solidity division.\n return a / b;\n }\n\n // (a + b - 1) / b can overflow on addition, so we distribute.\n return a == 0 ? 0 : (a - 1) / b + 1;\n }\n\n /**\n * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or\n * denominator == 0.\n * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by\n * Uniswap Labs also under MIT license.\n */\n function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {\n unchecked {\n // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use\n // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256\n // variables such that product = prod1 * 2^256 + prod0.\n uint256 prod0 = x * y; // Least significant 256 bits of the product\n uint256 prod1; // Most significant 256 bits of the product\n assembly {\n let mm := mulmod(x, y, not(0))\n prod1 := sub(sub(mm, prod0), lt(mm, prod0))\n }\n\n // Handle non-overflow cases, 256 by 256 division.\n if (prod1 == 0) {\n // Solidity will revert if denominator == 0, unlike the div opcode on its own.\n // The surrounding unchecked block does not change this fact.\n // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.\n return prod0 / denominator;\n }\n\n // Make sure the result is less than 2^256. Also prevents denominator == 0.\n if (denominator <= prod1) {\n revert MathOverflowedMulDiv();\n }\n\n ///////////////////////////////////////////////\n // 512 by 256 division.\n ///////////////////////////////////////////////\n\n // Make division exact by subtracting the remainder from [prod1 prod0].\n uint256 remainder;\n assembly {\n // Compute remainder using mulmod.\n remainder := mulmod(x, y, denominator)\n\n // Subtract 256 bit number from 512 bit number.\n prod1 := sub(prod1, gt(remainder, prod0))\n prod0 := sub(prod0, remainder)\n }\n\n // Factor powers of two out of denominator and compute largest power of two divisor of denominator.\n // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.\n\n uint256 twos = denominator & (0 - denominator);\n assembly {\n // Divide denominator by twos.\n denominator := div(denominator, twos)\n\n // Divide [prod1 prod0] by twos.\n prod0 := div(prod0, twos)\n\n // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.\n twos := add(div(sub(0, twos), twos), 1)\n }\n\n // Shift in bits from prod1 into prod0.\n prod0 |= prod1 * twos;\n\n // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such\n // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for\n // four bits. That is, denominator * inv = 1 mod 2^4.\n uint256 inverse = (3 * denominator) ^ 2;\n\n // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also\n // works in modular arithmetic, doubling the correct bits in each step.\n inverse *= 2 - denominator * inverse; // inverse mod 2^8\n inverse *= 2 - denominator * inverse; // inverse mod 2^16\n inverse *= 2 - denominator * inverse; // inverse mod 2^32\n inverse *= 2 - denominator * inverse; // inverse mod 2^64\n inverse *= 2 - denominator * inverse; // inverse mod 2^128\n inverse *= 2 - denominator * inverse; // inverse mod 2^256\n\n // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.\n // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is\n // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1\n // is no longer required.\n result = prod0 * inverse;\n return result;\n }\n }\n\n /**\n * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.\n */\n function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {\n uint256 result = mulDiv(x, y, denominator);\n if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {\n result += 1;\n }\n return result;\n }\n\n /**\n * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded\n * towards zero.\n *\n * Inspired by Henry S. Warren, Jr.'s \"Hacker's Delight\" (Chapter 11).\n */\n function sqrt(uint256 a) internal pure returns (uint256) {\n if (a == 0) {\n return 0;\n }\n\n // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.\n //\n // We know that the \"msb\" (most significant bit) of our target number `a` is a power of 2 such that we have\n // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.\n //\n // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`\n // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`\n // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`\n //\n // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.\n uint256 result = 1 << (log2(a) >> 1);\n\n // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,\n // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at\n // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision\n // into the expected uint128 result.\n unchecked {\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n return min(result, a / result);\n }\n }\n\n /**\n * @notice Calculates sqrt(a), following the selected rounding direction.\n */\n function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = sqrt(a);\n return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 2 of a positive value rounded towards zero.\n * Returns 0 if given 0.\n */\n function log2(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >> 128 > 0) {\n value >>= 128;\n result += 128;\n }\n if (value >> 64 > 0) {\n value >>= 64;\n result += 64;\n }\n if (value >> 32 > 0) {\n value >>= 32;\n result += 32;\n }\n if (value >> 16 > 0) {\n value >>= 16;\n result += 16;\n }\n if (value >> 8 > 0) {\n value >>= 8;\n result += 8;\n }\n if (value >> 4 > 0) {\n value >>= 4;\n result += 4;\n }\n if (value >> 2 > 0) {\n value >>= 2;\n result += 2;\n }\n if (value >> 1 > 0) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 2, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log2(value);\n return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 10 of a positive value rounded towards zero.\n * Returns 0 if given 0.\n */\n function log10(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >= 10 ** 64) {\n value /= 10 ** 64;\n result += 64;\n }\n if (value >= 10 ** 32) {\n value /= 10 ** 32;\n result += 32;\n }\n if (value >= 10 ** 16) {\n value /= 10 ** 16;\n result += 16;\n }\n if (value >= 10 ** 8) {\n value /= 10 ** 8;\n result += 8;\n }\n if (value >= 10 ** 4) {\n value /= 10 ** 4;\n result += 4;\n }\n if (value >= 10 ** 2) {\n value /= 10 ** 2;\n result += 2;\n }\n if (value >= 10 ** 1) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log10(value);\n return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 256 of a positive value rounded towards zero.\n * Returns 0 if given 0.\n *\n * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.\n */\n function log256(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >> 128 > 0) {\n value >>= 128;\n result += 16;\n }\n if (value >> 64 > 0) {\n value >>= 64;\n result += 8;\n }\n if (value >> 32 > 0) {\n value >>= 32;\n result += 4;\n }\n if (value >> 16 > 0) {\n value >>= 16;\n result += 2;\n }\n if (value >> 8 > 0) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 256, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log256(value);\n return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.\n */\n function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {\n return uint8(rounding) % 2 == 1;\n }\n}\n" }, "lib/openzeppelin-contracts/contracts/utils/math/SignedMath.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Standard signed math utilities missing in the Solidity language.\n */\nlibrary SignedMath {\n /**\n * @dev Returns the largest of two signed numbers.\n */\n function max(int256 a, int256 b) internal pure returns (int256) {\n return a > b ? a : b;\n }\n\n /**\n * @dev Returns the smallest of two signed numbers.\n */\n function min(int256 a, int256 b) internal pure returns (int256) {\n return a < b ? a : b;\n }\n\n /**\n * @dev Returns the average of two signed numbers without overflow.\n * The result is rounded towards zero.\n */\n function average(int256 a, int256 b) internal pure returns (int256) {\n // Formula from the book \"Hacker's Delight\"\n int256 x = (a & b) + ((a ^ b) >> 1);\n return x + (int256(uint256(x) >> 255) & (a ^ b));\n }\n\n /**\n * @dev Returns the absolute unsigned value of a signed value.\n */\n function abs(int256 n) internal pure returns (uint256) {\n unchecked {\n // must be unchecked in order to support `n = type(int256).min`\n return uint256(n >= 0 ? n : -n);\n }\n }\n}\n" }, "lib/openzeppelin-contracts/contracts/utils/Strings.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)\n\npragma solidity ^0.8.20;\n\nimport {Math} from \"./math/Math.sol\";\nimport {SignedMath} from \"./math/SignedMath.sol\";\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n bytes16 private constant HEX_DIGITS = \"0123456789abcdef\";\n uint8 private constant ADDRESS_LENGTH = 20;\n\n /**\n * @dev The `value` string doesn't fit in the specified `length`.\n */\n error StringsInsufficientHexLength(uint256 value, uint256 length);\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n */\n function toString(uint256 value) internal pure returns (string memory) {\n unchecked {\n uint256 length = Math.log10(value) + 1;\n string memory buffer = new string(length);\n uint256 ptr;\n /// @solidity memory-safe-assembly\n assembly {\n ptr := add(buffer, add(32, length))\n }\n while (true) {\n ptr--;\n /// @solidity memory-safe-assembly\n assembly {\n mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))\n }\n value /= 10;\n if (value == 0) break;\n }\n return buffer;\n }\n }\n\n /**\n * @dev Converts a `int256` to its ASCII `string` decimal representation.\n */\n function toStringSigned(int256 value) internal pure returns (string memory) {\n return string.concat(value < 0 ? \"-\" : \"\", toString(SignedMath.abs(value)));\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n */\n function toHexString(uint256 value) internal pure returns (string memory) {\n unchecked {\n return toHexString(value, Math.log256(value) + 1);\n }\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n */\n function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n uint256 localValue = value;\n bytes memory buffer = new bytes(2 * length + 2);\n buffer[0] = \"0\";\n buffer[1] = \"x\";\n for (uint256 i = 2 * length + 1; i > 1; --i) {\n buffer[i] = HEX_DIGITS[localValue & 0xf];\n localValue >>= 4;\n }\n if (localValue != 0) {\n revert StringsInsufficientHexLength(value, length);\n }\n return string(buffer);\n }\n\n /**\n * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal\n * representation.\n */\n function toHexString(address addr) internal pure returns (string memory) {\n return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);\n }\n\n /**\n * @dev Returns true if the two strings are equal.\n */\n function equal(string memory a, string memory b) internal pure returns (bool) {\n return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));\n }\n}\n" }, "lib/openzeppelin-contracts/contracts/utils/cryptography/MessageHashUtils.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MessageHashUtils.sol)\n\npragma solidity ^0.8.20;\n\nimport {Strings} from \"../Strings.sol\";\n\n/**\n * @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing.\n *\n * The library provides methods for generating a hash of a message that conforms to the\n * https://eips.ethereum.org/EIPS/eip-191[EIP 191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712]\n * specifications.\n */\nlibrary MessageHashUtils {\n /**\n * @dev Returns the keccak256 digest of an EIP-191 signed data with version\n * `0x45` (`personal_sign` messages).\n *\n * The digest is calculated by prefixing a bytes32 `messageHash` with\n * `\"\\x19Ethereum Signed Message:\\n32\"` and hashing the result. It corresponds with the\n * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.\n *\n * NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with\n * keccak256, although any bytes32 value can be safely used because the final digest will\n * be re-hashed.\n *\n * See {ECDSA-recover}.\n */\n function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) {\n /// @solidity memory-safe-assembly\n assembly {\n mstore(0x00, \"\\x19Ethereum Signed Message:\\n32\") // 32 is the bytes-length of messageHash\n mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix\n digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20)\n }\n }\n\n /**\n * @dev Returns the keccak256 digest of an EIP-191 signed data with version\n * `0x45` (`personal_sign` messages).\n *\n * The digest is calculated by prefixing an arbitrary `message` with\n * `\"\\x19Ethereum Signed Message:\\n\" + len(message)` and hashing the result. It corresponds with the\n * hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.\n *\n * See {ECDSA-recover}.\n */\n function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) {\n return\n keccak256(bytes.concat(\"\\x19Ethereum Signed Message:\\n\", bytes(Strings.toString(message.length)), message));\n }\n\n /**\n * @dev Returns the keccak256 digest of an EIP-191 signed data with version\n * `0x00` (data with intended validator).\n *\n * The digest is calculated by prefixing an arbitrary `data` with `\"\\x19\\x00\"` and the intended\n * `validator` address. Then hashing the result.\n *\n * See {ECDSA-recover}.\n */\n function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {\n return keccak256(abi.encodePacked(hex\"19_00\", validator, data));\n }\n\n /**\n * @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`).\n *\n * The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with\n * `\\x19\\x01` and hashing the result. It corresponds to the hash signed by the\n * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712.\n *\n * See {ECDSA-recover}.\n */\n function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) {\n /// @solidity memory-safe-assembly\n assembly {\n let ptr := mload(0x40)\n mstore(ptr, hex\"19_01\")\n mstore(add(ptr, 0x02), domainSeparator)\n mstore(add(ptr, 0x22), structHash)\n digest := keccak256(ptr, 0x42)\n }\n }\n}\n" }, "lib/openzeppelin-contracts/contracts/utils/StorageSlot.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol)\n// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Library for reading and writing primitive types to specific storage slots.\n *\n * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.\n * This library helps with reading and writing to such slots without the need for inline assembly.\n *\n * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.\n *\n * Example usage to set ERC1967 implementation slot:\n * ```solidity\n * contract ERC1967 {\n * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;\n *\n * function _getImplementation() internal view returns (address) {\n * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;\n * }\n *\n * function _setImplementation(address newImplementation) internal {\n * require(newImplementation.code.length > 0);\n * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;\n * }\n * }\n * ```\n */\nlibrary StorageSlot {\n struct AddressSlot {\n address value;\n }\n\n struct BooleanSlot {\n bool value;\n }\n\n struct Bytes32Slot {\n bytes32 value;\n }\n\n struct Uint256Slot {\n uint256 value;\n }\n\n struct StringSlot {\n string value;\n }\n\n struct BytesSlot {\n bytes value;\n }\n\n /**\n * @dev Returns an `AddressSlot` with member `value` located at `slot`.\n */\n function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {\n /// @solidity memory-safe-assembly\n assembly {\n r.slot := slot\n }\n }\n\n /**\n * @dev Returns an `BooleanSlot` with member `value` located at `slot`.\n */\n function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {\n /// @solidity memory-safe-assembly\n assembly {\n r.slot := slot\n }\n }\n\n /**\n * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.\n */\n function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {\n /// @solidity memory-safe-assembly\n assembly {\n r.slot := slot\n }\n }\n\n /**\n * @dev Returns an `Uint256Slot` with member `value` located at `slot`.\n */\n function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {\n /// @solidity memory-safe-assembly\n assembly {\n r.slot := slot\n }\n }\n\n /**\n * @dev Returns an `StringSlot` with member `value` located at `slot`.\n */\n function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {\n /// @solidity memory-safe-assembly\n assembly {\n r.slot := slot\n }\n }\n\n /**\n * @dev Returns an `StringSlot` representation of the string storage pointer `store`.\n */\n function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {\n /// @solidity memory-safe-assembly\n assembly {\n r.slot := store.slot\n }\n }\n\n /**\n * @dev Returns an `BytesSlot` with member `value` located at `slot`.\n */\n function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {\n /// @solidity memory-safe-assembly\n assembly {\n r.slot := slot\n }\n }\n\n /**\n * @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.\n */\n function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {\n /// @solidity memory-safe-assembly\n assembly {\n r.slot := store.slot\n }\n }\n}\n" } }, "settings": { "remappings": [ "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/", "@uniswap/v3-periphery/contracts/=lib/v3-periphery/contracts/", "@uniswap/v3-core/contracts/=lib/v3-core/contracts/", "forge-std/=lib/forge-std/src/", "ds-test/=lib/forge-std/lib/ds-test/src/", "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/", "openzeppelin-contracts/=lib/openzeppelin-contracts/", "v3-core/=lib/v3-core/", "v3-periphery/=lib/v3-periphery/contracts/" ], "optimizer": { "enabled": true, "runs": 200 }, "metadata": { "useLiteralContent": false, "bytecodeHash": "ipfs", "appendCBOR": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "paris", "libraries": {} } }}

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