@excubiae/contracts/build/artifacts/build-info/833ea2f606036d007ffe16f0c867180a.json

Excubiae contracts.

{"id":"833ea2f606036d007ffe16f0c867180a","_format":"hh-sol-build-info-1","solcVersion":"0.8.28","solcLongVersion":"0.8.28+commit.7893614a","input":{"language":"Solidity","sources":{"@openzeppelin/contracts/access/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 \"../utils/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"},"@openzeppelin/contracts/governance/utils/IVotes.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (governance/utils/IVotes.sol)\npragma solidity ^0.8.20;\n\n/**\n * @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts.\n */\ninterface IVotes {\n    /**\n     * @dev The signature used has expired.\n     */\n    error VotesExpiredSignature(uint256 expiry);\n\n    /**\n     * @dev Emitted when an account changes their delegate.\n     */\n    event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);\n\n    /**\n     * @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of voting units.\n     */\n    event DelegateVotesChanged(address indexed delegate, uint256 previousVotes, uint256 newVotes);\n\n    /**\n     * @dev Returns the current amount of votes that `account` has.\n     */\n    function getVotes(address account) external view returns (uint256);\n\n    /**\n     * @dev Returns the amount of votes that `account` had at a specific moment in the past. If the `clock()` is\n     * configured to use block numbers, this will return the value at the end of the corresponding block.\n     */\n    function getPastVotes(address account, uint256 timepoint) external view returns (uint256);\n\n    /**\n     * @dev Returns the total supply of votes available at a specific moment in the past. If the `clock()` is\n     * configured to use block numbers, this will return the value at the end of the corresponding block.\n     *\n     * NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.\n     * Votes that have not been delegated are still part of total supply, even though they would not participate in a\n     * vote.\n     */\n    function getPastTotalSupply(uint256 timepoint) external view returns (uint256);\n\n    /**\n     * @dev Returns the delegate that `account` has chosen.\n     */\n    function delegates(address account) external view returns (address);\n\n    /**\n     * @dev Delegates votes from the sender to `delegatee`.\n     */\n    function delegate(address delegatee) external;\n\n    /**\n     * @dev Delegates votes from signer to `delegatee`.\n     */\n    function delegateBySig(address delegatee, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s) external;\n}\n"},"@openzeppelin/contracts/interfaces/draft-IERC6093.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/draft-IERC6093.sol)\npragma solidity ^0.8.20;\n\n/**\n * @dev Standard ERC-20 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-20 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 ERC-721 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-721 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 ERC-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 ERC-1155 Errors\n * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC-1155 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"},"@openzeppelin/contracts/token/ERC20/ERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.2.0) (token/ERC20/ERC20.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC20} from \"./IERC20.sol\";\nimport {IERC20Metadata} from \"./extensions/IERC20Metadata.sol\";\nimport {Context} from \"../../utils/Context.sol\";\nimport {IERC20Errors} from \"../../interfaces/draft-IERC6093.sol\";\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 ERC-20\n * applications.\n */\nabstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {\n    mapping(address account => uint256) private _balances;\n\n    mapping(address account => mapping(address spender => uint256)) private _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     * Skips emitting an {Approval} event indicating an allowance update. This is not\n     * required by the ERC. See {xref-ERC20-_approve-address-address-uint256-bool-}[_approve].\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 {\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     * ```solidity\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"},"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC20} from \"../IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC-20 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"},"@openzeppelin/contracts/token/ERC20/IERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Interface of the ERC-20 standard as defined in the ERC.\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"},"@openzeppelin/contracts/token/ERC721/ERC721.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC721/ERC721.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC721} from \"./IERC721.sol\";\nimport {IERC721Metadata} from \"./extensions/IERC721Metadata.sol\";\nimport {ERC721Utils} from \"./utils/ERC721Utils.sol\";\nimport {Context} from \"../../utils/Context.sol\";\nimport {Strings} from \"../../utils/Strings.sol\";\nimport {IERC165, ERC165} from \"../../utils/introspection/ERC165.sol\";\nimport {IERC721Errors} from \"../../interfaces/draft-IERC6093.sol\";\n\n/**\n * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC-721] Non-Fungible Token Standard, including\n * the Metadata extension, but not including the Enumerable extension, which is available separately as\n * {ERC721Enumerable}.\n */\nabstract contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Errors {\n    using Strings for uint256;\n\n    // Token name\n    string private _name;\n\n    // Token symbol\n    string private _symbol;\n\n    mapping(uint256 tokenId => address) private _owners;\n\n    mapping(address owner => uint256) private _balances;\n\n    mapping(uint256 tokenId => address) private _tokenApprovals;\n\n    mapping(address owner => mapping(address operator => bool)) private _operatorApprovals;\n\n    /**\n     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.\n     */\n    constructor(string memory name_, string memory symbol_) {\n        _name = name_;\n        _symbol = symbol_;\n    }\n\n    /**\n     * @dev See {IERC165-supportsInterface}.\n     */\n    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {\n        return\n            interfaceId == type(IERC721).interfaceId ||\n            interfaceId == type(IERC721Metadata).interfaceId ||\n            super.supportsInterface(interfaceId);\n    }\n\n    /**\n     * @dev See {IERC721-balanceOf}.\n     */\n    function balanceOf(address owner) public view virtual returns (uint256) {\n        if (owner == address(0)) {\n            revert ERC721InvalidOwner(address(0));\n        }\n        return _balances[owner];\n    }\n\n    /**\n     * @dev See {IERC721-ownerOf}.\n     */\n    function ownerOf(uint256 tokenId) public view virtual returns (address) {\n        return _requireOwned(tokenId);\n    }\n\n    /**\n     * @dev See {IERC721Metadata-name}.\n     */\n    function name() public view virtual returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-symbol}.\n     */\n    function symbol() public view virtual returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev See {IERC721Metadata-tokenURI}.\n     */\n    function tokenURI(uint256 tokenId) public view virtual returns (string memory) {\n        _requireOwned(tokenId);\n\n        string memory baseURI = _baseURI();\n        return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : \"\";\n    }\n\n    /**\n     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each\n     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty\n     * by default, can be overridden in child contracts.\n     */\n    function _baseURI() internal view virtual returns (string memory) {\n        return \"\";\n    }\n\n    /**\n     * @dev See {IERC721-approve}.\n     */\n    function approve(address to, uint256 tokenId) public virtual {\n        _approve(to, tokenId, _msgSender());\n    }\n\n    /**\n     * @dev See {IERC721-getApproved}.\n     */\n    function getApproved(uint256 tokenId) public view virtual returns (address) {\n        _requireOwned(tokenId);\n\n        return _getApproved(tokenId);\n    }\n\n    /**\n     * @dev See {IERC721-setApprovalForAll}.\n     */\n    function setApprovalForAll(address operator, bool approved) public virtual {\n        _setApprovalForAll(_msgSender(), operator, approved);\n    }\n\n    /**\n     * @dev See {IERC721-isApprovedForAll}.\n     */\n    function isApprovedForAll(address owner, address operator) public view virtual returns (bool) {\n        return _operatorApprovals[owner][operator];\n    }\n\n    /**\n     * @dev See {IERC721-transferFrom}.\n     */\n    function transferFrom(address from, address to, uint256 tokenId) public virtual {\n        if (to == address(0)) {\n            revert ERC721InvalidReceiver(address(0));\n        }\n        // Setting an \"auth\" arguments enables the `_isAuthorized` check which verifies that the token exists\n        // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.\n        address previousOwner = _update(to, tokenId, _msgSender());\n        if (previousOwner != from) {\n            revert ERC721IncorrectOwner(from, tokenId, previousOwner);\n        }\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(address from, address to, uint256 tokenId) public {\n        safeTransferFrom(from, to, tokenId, \"\");\n    }\n\n    /**\n     * @dev See {IERC721-safeTransferFrom}.\n     */\n    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual {\n        transferFrom(from, to, tokenId);\n        ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data);\n    }\n\n    /**\n     * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist\n     *\n     * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the\n     * core ERC-721 logic MUST be matched with the use of {_increaseBalance} to keep balances\n     * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by\n     * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`.\n     */\n    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {\n        return _owners[tokenId];\n    }\n\n    /**\n     * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted.\n     */\n    function _getApproved(uint256 tokenId) internal view virtual returns (address) {\n        return _tokenApprovals[tokenId];\n    }\n\n    /**\n     * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in\n     * particular (ignoring whether it is owned by `owner`).\n     *\n     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this\n     * assumption.\n     */\n    function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) {\n        return\n            spender != address(0) &&\n            (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender);\n    }\n\n    /**\n     * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner.\n     * Reverts if:\n     * - `spender` does not have approval from `owner` for `tokenId`.\n     * - `spender` does not have approval to manage all of `owner`'s assets.\n     *\n     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this\n     * assumption.\n     */\n    function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual {\n        if (!_isAuthorized(owner, spender, tokenId)) {\n            if (owner == address(0)) {\n                revert ERC721NonexistentToken(tokenId);\n            } else {\n                revert ERC721InsufficientApproval(spender, tokenId);\n            }\n        }\n    }\n\n    /**\n     * @dev Unsafe write access to the balances, used by extensions that \"mint\" tokens using an {ownerOf} override.\n     *\n     * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that\n     * a uint256 would ever overflow from increments when these increments are bounded to uint128 values.\n     *\n     * WARNING: Increasing an account's balance using this function tends to be paired with an override of the\n     * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership\n     * remain consistent with one another.\n     */\n    function _increaseBalance(address account, uint128 value) internal virtual {\n        unchecked {\n            _balances[account] += value;\n        }\n    }\n\n    /**\n     * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner\n     * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update.\n     *\n     * The `auth` argument is optional. If the value passed is non 0, then this function will check that\n     * `auth` is either the owner of the token, or approved to operate on the token (by the owner).\n     *\n     * Emits a {Transfer} event.\n     *\n     * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}.\n     */\n    function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) {\n        address from = _ownerOf(tokenId);\n\n        // Perform (optional) operator check\n        if (auth != address(0)) {\n            _checkAuthorized(from, auth, tokenId);\n        }\n\n        // Execute the update\n        if (from != address(0)) {\n            // Clear approval. No need to re-authorize or emit the Approval event\n            _approve(address(0), tokenId, address(0), false);\n\n            unchecked {\n                _balances[from] -= 1;\n            }\n        }\n\n        if (to != address(0)) {\n            unchecked {\n                _balances[to] += 1;\n            }\n        }\n\n        _owners[tokenId] = to;\n\n        emit Transfer(from, to, tokenId);\n\n        return from;\n    }\n\n    /**\n     * @dev Mints `tokenId` and transfers it to `to`.\n     *\n     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible\n     *\n     * Requirements:\n     *\n     * - `tokenId` must not exist.\n     * - `to` cannot be the zero address.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _mint(address to, uint256 tokenId) internal {\n        if (to == address(0)) {\n            revert ERC721InvalidReceiver(address(0));\n        }\n        address previousOwner = _update(to, tokenId, address(0));\n        if (previousOwner != address(0)) {\n            revert ERC721InvalidSender(address(0));\n        }\n    }\n\n    /**\n     * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must not exist.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _safeMint(address to, uint256 tokenId) internal {\n        _safeMint(to, tokenId, \"\");\n    }\n\n    /**\n     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is\n     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.\n     */\n    function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {\n        _mint(to, tokenId);\n        ERC721Utils.checkOnERC721Received(_msgSender(), address(0), to, tokenId, data);\n    }\n\n    /**\n     * @dev Destroys `tokenId`.\n     * The approval is cleared when the token is burned.\n     * This is an internal function that does not check if the sender is authorized to operate on the token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _burn(uint256 tokenId) internal {\n        address previousOwner = _update(address(0), tokenId, address(0));\n        if (previousOwner == address(0)) {\n            revert ERC721NonexistentToken(tokenId);\n        }\n    }\n\n    /**\n     * @dev Transfers `tokenId` from `from` to `to`.\n     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.\n     *\n     * Requirements:\n     *\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _transfer(address from, address to, uint256 tokenId) internal {\n        if (to == address(0)) {\n            revert ERC721InvalidReceiver(address(0));\n        }\n        address previousOwner = _update(to, tokenId, address(0));\n        if (previousOwner == address(0)) {\n            revert ERC721NonexistentToken(tokenId);\n        } else if (previousOwner != from) {\n            revert ERC721IncorrectOwner(from, tokenId, previousOwner);\n        }\n    }\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients\n     * are aware of the ERC-721 standard to prevent tokens from being forever locked.\n     *\n     * `data` is additional data, it has no specified format and it is sent in call to `to`.\n     *\n     * This internal function is like {safeTransferFrom} in the sense that it invokes\n     * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g.\n     * implement alternative mechanisms to perform token transfer, such as signature-based.\n     *\n     * Requirements:\n     *\n     * - `tokenId` token must exist and be owned by `from`.\n     * - `to` cannot be the zero address.\n     * - `from` cannot be the zero address.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function _safeTransfer(address from, address to, uint256 tokenId) internal {\n        _safeTransfer(from, to, tokenId, \"\");\n    }\n\n    /**\n     * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is\n     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.\n     */\n    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {\n        _transfer(from, to, tokenId);\n        ERC721Utils.checkOnERC721Received(_msgSender(), from, to, tokenId, data);\n    }\n\n    /**\n     * @dev Approve `to` to operate on `tokenId`\n     *\n     * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is\n     * either the owner of the token, or approved to operate on all tokens held by this owner.\n     *\n     * Emits an {Approval} event.\n     *\n     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.\n     */\n    function _approve(address to, uint256 tokenId, address auth) internal {\n        _approve(to, tokenId, auth, true);\n    }\n\n    /**\n     * @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not\n     * emitted in the context of transfers.\n     */\n    function _approve(address to, uint256 tokenId, address auth, bool emitEvent) internal virtual {\n        // Avoid reading the owner unless necessary\n        if (emitEvent || auth != address(0)) {\n            address owner = _requireOwned(tokenId);\n\n            // We do not use _isAuthorized because single-token approvals should not be able to call approve\n            if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) {\n                revert ERC721InvalidApprover(auth);\n            }\n\n            if (emitEvent) {\n                emit Approval(owner, to, tokenId);\n            }\n        }\n\n        _tokenApprovals[tokenId] = to;\n    }\n\n    /**\n     * @dev Approve `operator` to operate on all of `owner` tokens\n     *\n     * Requirements:\n     * - operator can't be the address zero.\n     *\n     * Emits an {ApprovalForAll} event.\n     */\n    function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {\n        if (operator == address(0)) {\n            revert ERC721InvalidOperator(operator);\n        }\n        _operatorApprovals[owner][operator] = approved;\n        emit ApprovalForAll(owner, operator, approved);\n    }\n\n    /**\n     * @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned).\n     * Returns the owner.\n     *\n     * Overrides to ownership logic should be done to {_ownerOf}.\n     */\n    function _requireOwned(uint256 tokenId) internal view returns (address) {\n        address owner = _ownerOf(tokenId);\n        if (owner == address(0)) {\n            revert ERC721NonexistentToken(tokenId);\n        }\n        return owner;\n    }\n}\n"},"@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/IERC721Metadata.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC721} from \"../IERC721.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional metadata extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Metadata is IERC721 {\n    /**\n     * @dev Returns the token collection name.\n     */\n    function name() external view returns (string memory);\n\n    /**\n     * @dev Returns the token collection symbol.\n     */\n    function symbol() external view returns (string memory);\n\n    /**\n     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.\n     */\n    function tokenURI(uint256 tokenId) external view returns (string memory);\n}\n"},"@openzeppelin/contracts/token/ERC721/IERC721.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC721/IERC721.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC165} from \"../../utils/introspection/IERC165.sol\";\n\n/**\n * @dev Required interface of an ERC-721 compliant contract.\n */\ninterface IERC721 is IERC165 {\n    /**\n     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.\n     */\n    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.\n     */\n    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);\n\n    /**\n     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.\n     */\n    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);\n\n    /**\n     * @dev Returns the number of tokens in ``owner``'s account.\n     */\n    function balanceOf(address owner) external view returns (uint256 balance);\n\n    /**\n     * @dev Returns the owner of the `tokenId` token.\n     *\n     * Requirements:\n     *\n     * - `tokenId` must exist.\n     */\n    function ownerOf(uint256 tokenId) external view returns (address owner);\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon\n     *   a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;\n\n    /**\n     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients\n     * are aware of the ERC-721 protocol to prevent tokens from being forever locked.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must exist and be owned by `from`.\n     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or\n     *   {setApprovalForAll}.\n     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon\n     *   a safe transfer.\n     *\n     * Emits a {Transfer} event.\n     */\n    function safeTransferFrom(address from, address to, uint256 tokenId) external;\n\n    /**\n     * @dev Transfers `tokenId` token from `from` to `to`.\n     *\n     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC-721\n     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must\n     * understand this adds an external call which potentially creates a reentrancy vulnerability.\n     *\n     * Requirements:\n     *\n     * - `from` cannot be the zero address.\n     * - `to` cannot be the zero address.\n     * - `tokenId` token must be owned by `from`.\n     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.\n     *\n     * Emits a {Transfer} event.\n     */\n    function transferFrom(address from, address to, uint256 tokenId) external;\n\n    /**\n     * @dev Gives permission to `to` to transfer `tokenId` token to another account.\n     * The approval is cleared when the token is transferred.\n     *\n     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.\n     *\n     * Requirements:\n     *\n     * - The caller must own the token or be an approved operator.\n     * - `tokenId` must exist.\n     *\n     * Emits an {Approval} event.\n     */\n    function approve(address to, uint256 tokenId) external;\n\n    /**\n     * @dev Approve or remove `operator` as an operator for the caller.\n     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.\n     *\n     *