Token

NFTrees (TREE)

Feature Tip: Add private address tag to any address under My Name Tag !

ERC-721

NFT

Overview

Max Total Supply

420 TREE

Holders

248

Market

Volume (24H)

N/A

Min Price (24H)

N/A

Max Price (24H)

N/A

Other Info

Token Contract

0xeaa4c58427c184413b04db47889b28b5c98ebb7b

Filtered by Token Holder

0x7FF800391cD65046221F380783F8047B85d9AD2c

paulstayt.eth

Balance

0 TREE

0x7ff800391cd65046221f380783f8047b85d9ad2c

OVERVIEW

https://www.twitter.com/thetreeverse

#	Exchange	Pair	Price	24H Volume	% Volume

Contract Source Code Verified (Exact Match)

Contract Name:

Nftrees

Compiler Version

v0.7.6+commit.7338295f

Optimization Enabled:

Yes with 200 runs

Other Settings:

default evmVersion, MIT license

Contract Source Code (Solidity)

IDE

/**
 *Submitted for verification at Etherscan.io on 2021-02-01
*/

// File: @openzeppelin/contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/introspection/IERC165.sol


pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol


pragma solidity >=0.6.2 <0.8.0;


/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
      * @dev Safely transfers `tokenId` token from `from` to `to`.
      *
      * Requirements:
      *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
      * - `tokenId` token must exist and be owned by `from`.
      * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
      * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
      *
      * Emits a {Transfer} event.
      */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Metadata.sol


pragma solidity >=0.6.2 <0.8.0;


/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {

    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Enumerable.sol


pragma solidity >=0.6.2 <0.8.0;


/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {

    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol


pragma solidity >=0.6.0 <0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external returns (bytes4);
}

// File: @openzeppelin/contracts/introspection/ERC165.sol


pragma solidity >=0.6.0 <0.8.0;


/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts may inherit from this and call {_registerInterface} to declare
 * their support of an interface.
 */
abstract contract ERC165 is IERC165 {
    /*
     * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
     */
    bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;

    /**
     * @dev Mapping of interface ids to whether or not it's supported.
     */
    mapping(bytes4 => bool) private _supportedInterfaces;

    constructor () internal {
        // Derived contracts need only register support for their own interfaces,
        // we register support for ERC165 itself here
        _registerInterface(_INTERFACE_ID_ERC165);
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     *
     * Time complexity O(1), guaranteed to always use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
        return _supportedInterfaces[interfaceId];
    }

    /**
     * @dev Registers the contract as an implementer of the interface defined by
     * `interfaceId`. Support of the actual ERC165 interface is automatic and
     * registering its interface id is not required.
     *
     * See {IERC165-supportsInterface}.
     *
     * Requirements:
     *
     * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
     */
    function _registerInterface(bytes4 interfaceId) internal virtual {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        _supportedInterfaces[interfaceId] = true;
    }
}

// File: @openzeppelin/contracts/math/SafeMath.sol


pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @openzeppelin/contracts/utils/Address.sol


pragma solidity >=0.6.2 <0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts/utils/EnumerableSet.sol


pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;

        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) { // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint256(_at(set._inner, index)));
    }


    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

// File: @openzeppelin/contracts/utils/EnumerableMap.sol


pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Library for managing an enumerable variant of Solidity's
 * https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
 * type.
 *
 * Maps have the following properties:
 *
 * - Entries are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Entries are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableMap for EnumerableMap.UintToAddressMap;
 *
 *     // Declare a set state variable
 *     EnumerableMap.UintToAddressMap private myMap;
 * }
 * ```
 *
 * As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
 * supported.
 */
library EnumerableMap {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Map type with
    // bytes32 keys and values.
    // The Map implementation uses private functions, and user-facing
    // implementations (such as Uint256ToAddressMap) are just wrappers around
    // the underlying Map.
    // This means that we can only create new EnumerableMaps for types that fit
    // in bytes32.

    struct MapEntry {
        bytes32 _key;
        bytes32 _value;
    }

    struct Map {
        // Storage of map keys and values
        MapEntry[] _entries;

        // Position of the entry defined by a key in the `entries` array, plus 1
        // because index 0 means a key is not in the map.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Adds a key-value pair to a map, or updates the value for an existing
     * key. O(1).
     *
     * Returns true if the key was added to the map, that is if it was not
     * already present.
     */
    function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
        // We read and store the key's index to prevent multiple reads from the same storage slot
        uint256 keyIndex = map._indexes[key];

        if (keyIndex == 0) { // Equivalent to !contains(map, key)
            map._entries.push(MapEntry({ _key: key, _value: value }));
            // The entry is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            map._indexes[key] = map._entries.length;
            return true;
        } else {
            map._entries[keyIndex - 1]._value = value;
            return false;
        }
    }

    /**
     * @dev Removes a key-value pair from a map. O(1).
     *
     * Returns true if the key was removed from the map, that is if it was present.
     */
    function _remove(Map storage map, bytes32 key) private returns (bool) {
        // We read and store the key's index to prevent multiple reads from the same storage slot
        uint256 keyIndex = map._indexes[key];

        if (keyIndex != 0) { // Equivalent to contains(map, key)
            // To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
            // in the array, and then remove the last entry (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = keyIndex - 1;
            uint256 lastIndex = map._entries.length - 1;

            // When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            MapEntry storage lastEntry = map._entries[lastIndex];

            // Move the last entry to the index where the entry to delete is
            map._entries[toDeleteIndex] = lastEntry;
            // Update the index for the moved entry
            map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved entry was stored
            map._entries.pop();

            // Delete the index for the deleted slot
            delete map._indexes[key];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the key is in the map. O(1).
     */
    function _contains(Map storage map, bytes32 key) private view returns (bool) {
        return map._indexes[key] != 0;
    }

    /**
     * @dev Returns the number of key-value pairs in the map. O(1).
     */
    function _length(Map storage map) private view returns (uint256) {
        return map._entries.length;
    }

   /**
    * @dev Returns the key-value pair stored at position `index` in the map. O(1).
    *
    * Note that there are no guarantees on the ordering of entries inside the
    * array, and it may change when more entries are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
        require(map._entries.length > index, "EnumerableMap: index out of bounds");

        MapEntry storage entry = map._entries[index];
        return (entry._key, entry._value);
    }

    /**
     * @dev Returns the value associated with `key`.  O(1).
     *
     * Requirements:
     *
     * - `key` must be in the map.
     */
    function _get(Map storage map, bytes32 key) private view returns (bytes32) {
        return _get(map, key, "EnumerableMap: nonexistent key");
    }

    /**
     * @dev Same as {_get}, with a custom error message when `key` is not in the map.
     */
    function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
        uint256 keyIndex = map._indexes[key];
        require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
        return map._entries[keyIndex - 1]._value; // All indexes are 1-based
    }

    // UintToAddressMap

    struct UintToAddressMap {
        Map _inner;
    }

    /**
     * @dev Adds a key-value pair to a map, or updates the value for an existing
     * key. O(1).
     *
     * Returns true if the key was added to the map, that is if it was not
     * already present.
     */
    function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
        return _set(map._inner, bytes32(key), bytes32(uint256(value)));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the key was removed from the map, that is if it was present.
     */
    function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
        return _remove(map._inner, bytes32(key));
    }

    /**
     * @dev Returns true if the key is in the map. O(1).
     */
    function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
        return _contains(map._inner, bytes32(key));
    }

    /**
     * @dev Returns the number of elements in the map. O(1).
     */
    function length(UintToAddressMap storage map) internal view returns (uint256) {
        return _length(map._inner);
    }

   /**
    * @dev Returns the element stored at position `index` in the set. O(1).
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
        (bytes32 key, bytes32 value) = _at(map._inner, index);
        return (uint256(key), address(uint256(value)));
    }

    /**
     * @dev Returns the value associated with `key`.  O(1).
     *
     * Requirements:
     *
     * - `key` must be in the map.
     */
    function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
        return address(uint256(_get(map._inner, bytes32(key))));
    }

    /**
     * @dev Same as {get}, with a custom error message when `key` is not in the map.
     */
    function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
        return address(uint256(_get(map._inner, bytes32(key), errorMessage)));
    }
}

// File: @openzeppelin/contracts/utils/Strings.sol


pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    /**
     * @dev Converts a `uint256` to its ASCII `string` representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        uint256 index = digits - 1;
        temp = value;
        while (temp != 0) {
            buffer[index--] = byte(uint8(48 + temp % 10));
            temp /= 10;
        }
        return string(buffer);
    }
}

// File: @openzeppelin/contracts/token/ERC721/ERC721.sol


pragma solidity >=0.6.0 <0.8.0;












/**
 * @title ERC721 Non-Fungible Token Standard basic implementation
 * @dev see https://eips.ethereum.org/EIPS/eip-721
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
    using SafeMath for uint256;
    using Address for address;
    using EnumerableSet for EnumerableSet.UintSet;
    using EnumerableMap for EnumerableMap.UintToAddressMap;
    using Strings for uint256;

    // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
    // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
    bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;

    // Mapping from holder address to their (enumerable) set of owned tokens
    mapping (address => EnumerableSet.UintSet) private _holderTokens;

    // Enumerable mapping from token ids to their owners
    EnumerableMap.UintToAddressMap private _tokenOwners;

    // Mapping from token ID to approved address
    mapping (uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping (address => mapping (address => bool)) private _operatorApprovals;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Optional mapping for token URIs
    mapping (uint256 => string) private _tokenURIs;

    // Base URI
    string private _baseURI;

    /*
     *     bytes4(keccak256('balanceOf(address)')) == 0x70a08231
     *     bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
     *     bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
     *     bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
     *     bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
     *     bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
     *     bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
     *     bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
     *     bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
     *
     *     => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
     *        0xa22cb465 ^ 0xe985e9c5 ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
     */
    bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;

    /*
     *     bytes4(keccak256('name()')) == 0x06fdde03
     *     bytes4(keccak256('symbol()')) == 0x95d89b41
     *     bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
     *
     *     => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
     */
    bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;

    /*
     *     bytes4(keccak256('totalSupply()')) == 0x18160ddd
     *     bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
     *     bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
     *
     *     => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
     */
    bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor (string memory name_, string memory symbol_) public {
        _name = name_;
        _symbol = symbol_;

        // register the supported interfaces to conform to ERC721 via ERC165
        _registerInterface(_INTERFACE_ID_ERC721);
        _registerInterface(_INTERFACE_ID_ERC721_METADATA);
        _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");

        return _holderTokens[owner].length();
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view override returns (address) {
        return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory _tokenURI = _tokenURIs[tokenId];

        // If there is no base URI, return the token URI.
        if (bytes(_baseURI).length == 0) {
            return _tokenURI;
        }
        // If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
        if (bytes(_tokenURI).length > 0) {
            return string(abi.encodePacked(_baseURI, _tokenURI));
        }
        // If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
        return string(abi.encodePacked(_baseURI, tokenId.toString()));
    }

    /**
    * @dev Returns the base URI set via {_setBaseURI}. This will be
    * automatically added as a prefix in {tokenURI} to each token's URI, or
    * to the token ID if no specific URI is set for that token ID.
    */
    function baseURI() public view returns (string memory) {
        return _baseURI;
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
        return _holderTokens[owner].at(index);
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        // _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
        return _tokenOwners.length();
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view override returns (uint256) {
        (uint256 tokenId, ) = _tokenOwners.at(index);
        return tokenId;
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        require(operator != _msgSender(), "ERC721: approve to caller");

        _operatorApprovals[_msgSender()][operator] = approved;
        emit ApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(address from, address to, uint256 tokenId) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        return _tokenOwners.contains(tokenId);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     d*
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
        _mint(to, tokenId);
        require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _holderTokens[to].add(tokenId);

        _tokenOwners.set(tokenId, to);

        emit Transfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        // Clear metadata (if any)
        if (bytes(_tokenURIs[tokenId]).length != 0) {
            delete _tokenURIs[tokenId];
        }

        _holderTokens[owner].remove(tokenId);

        _tokenOwners.remove(tokenId);

        emit Transfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(address from, address to, uint256 tokenId) internal virtual {
        require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _holderTokens[from].remove(tokenId);
        _holderTokens[to].add(tokenId);

        _tokenOwners.set(tokenId, to);

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
        require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
        _tokenURIs[tokenId] = _tokenURI;
    }

    /**
     * @dev Internal function to set the base URI for all token IDs. It is
     * automatically added as a prefix to the value returned in {tokenURI},
     * or to the token ID if {tokenURI} is empty.
     */
    function _setBaseURI(string memory baseURI_) internal virtual {
        _baseURI = baseURI_;
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
        private returns (bool)
    {
        if (!to.isContract()) {
            return true;
        }
        bytes memory returndata = to.functionCall(abi.encodeWithSelector(
            IERC721Receiver(to).onERC721Received.selector,
            _msgSender(),
            from,
            tokenId,
            _data
        ), "ERC721: transfer to non ERC721Receiver implementer");
        bytes4 retval = abi.decode(returndata, (bytes4));
        return (retval == _ERC721_RECEIVED);
    }

    function _approve(address to, uint256 tokenId) private {
        _tokenApprovals[tokenId] = to;
        emit Approval(ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
}

// File: @openzeppelin/contracts/utils/Counters.sol


pragma solidity >=0.6.0 <0.8.0;


/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 * Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath}
 * overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never
 * directly accessed.
 */
library Counters {
    using SafeMath for uint256;

    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        // The {SafeMath} overflow check can be skipped here, see the comment at the top
        counter._value += 1;
    }

    function decrement(Counter storage counter) internal {
        counter._value = counter._value.sub(1);
    }
}

// File: contracts/Nftrees.sol

pragma solidity >=0.7.0 <0.8.0;




contract Nftrees is ERC721 {
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;

    address payable private _owner;
    uint256 private _cap = 0;

    event CapChanged(uint256 newCap);

    constructor(string memory myBase) ERC721("NFTrees", "TREE") {
        _setBaseURI(myBase);
        _owner = msg.sender;
    }

    function buyItem()
        public
        payable
        returns (uint256)
    {
        require(msg.value == 0.2 ether, "Need to send exactly 0.2 ether");
        _tokenIds.increment();
        uint256 newItemId = _tokenIds.current();
        _safeMint(msg.sender, newItemId);
        _owner.transfer(msg.value);
        return newItemId;
    }   

    function getOwner() public view returns (address) {
        return _owner;
    }
    
    function getCap() public view returns (uint256){
        return _cap;
    }

    function setCap(uint256 newCap) public {
        require(_owner==msg.sender);
        require(newCap<=420);
        _cap = newCap;
        emit CapChanged(newCap);
    }

    function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {
        super._beforeTokenTransfer(from, to, tokenId);
        if (from == address(0)) { 
            require(totalSupply() < _cap, "ERC721 Capped: cap exceeded");
        }
    }
}

Contract Security Audit

No Contract Security Audit Submitted- Submit Audit Here

Contract ABI

[{"inputs":[{"internalType":"string","name":"myBase","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newCap","type":"uint256"}],"name":"CapChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"buyItem","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCap","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newCap","type":"uint256"}],"name":"setCap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"}]

Contract Creation Code

Decompile Bytecode Switch to Opcodes View

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

Deployed Bytecode

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

Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000036697066733a2f2f516d554573357731575a4b72486b78773370336659476a326a5a4b664c5a43555277577673584a647a484c4a42392f00000000000000000000

-----Decoded View---------------
Arg [0] : myBase (string): ipfs://QmUEs5w1WZKrHkxw3p3fYGj2jZKfLZCURwWvsXJdzHLJB9/

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000020
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000036
Arg [2] : 697066733a2f2f516d554573357731575a4b72486b78773370336659476a326a
Arg [3] : 5a4b664c5a43555277577673584a647a484c4a42392f00000000000000000000

Deployed Bytecode Sourcemap

61172:1383:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;10217:142;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;10217:142:0;-1:-1:-1;;;;;;10217:142:0;;:::i;:::-;;;;;;;;;;;;;;;;;;46937:92;;;;;;;;;;;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;49624:213;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;49624:213:0;;:::i;:::-;;;;-1:-1:-1;;;;;49624:213:0;;;;;;;;;;;;;;49168:390;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;49168:390:0;;;;;;;;:::i;:::-;;48662:203;;;;;;;;;;;;;:::i;:::-;;;;;;;;;;;;;;;;50498:305;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;50498:305:0;;;;;;;;;;;;;;;;;:::i;48432:154::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;48432:154:0;;;;;;;;:::i;50874:151::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;50874:151:0;;;;;;;;;;;;;;;;;:::i;62085:174::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;62085:174:0;;:::i;48942:164::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;48942:164:0;;:::i;62000:77::-;;;;;;;;;;;;;:::i;46701:169::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;46701:169:0;;:::i;48259:89::-;;;;;;;;;;;;;:::i;46424:215::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;46424:215:0;-1:-1:-1;;;;;46424:215:0;;:::i;61538:357::-;;;:::i;61906:82::-;;;;;;;;;;;;;:::i;47098:96::-;;;;;;;;;;;;;:::i;49909:295::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;49909:295:0;;;;;;;;;;:::i;51096:285::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;51096:285:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;51096:285:0;;-1:-1:-1;51096:285:0;;-1:-1:-1;;;;;51096:285:0:i;47265:755::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;47265:755:0;;:::i;50275:156::-;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;50275:156:0;;;;;;;;;;:::i;10217:142::-;-1:-1:-1;;;;;;10318:33:0;;10294:4;10318:33;;;;;;;;;;;;;10217:142;;;;:::o;46937:92::-;47016:5;47009:12;;;;;;;;-1:-1:-1;;47009:12:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;46983:13;;47009:12;;47016:5;;47009:12;;47016:5;47009:12;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;46937:92;:::o;49624:213::-;49692:7;49720:16;49728:7;49720;:16::i;:::-;49712:73;;;;-1:-1:-1;;;49712:73:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;49805:24:0;;;;:15;:24;;;;;;-1:-1:-1;;;;;49805:24:0;;49624:213::o;49168:390::-;49249:13;49265:16;49273:7;49265;:16::i;:::-;49249:32;;49306:5;-1:-1:-1;;;;;49300:11:0;:2;-1:-1:-1;;;;;49300:11:0;;;49292:57;;;;-1:-1:-1;;;49292:57:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;49386:5;-1:-1:-1;;;;;49370:21:0;:12;:10;:12::i;:::-;-1:-1:-1;;;;;49370:21:0;;:62;;;;49395:37;49412:5;49419:12;:10;:12::i;:::-;49395:16;:37::i;:::-;49362:154;;;;-1:-1:-1;;;49362:154:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;49529:21;49538:2;49542:7;49529:8;:21::i;:::-;49168:390;;;:::o;48662:203::-;48715:7;48836:21;:12;:19;:21::i;:::-;48829:28;;48662:203;:::o;50498:305::-;50659:41;50678:12;:10;:12::i;:::-;50692:7;50659:18;:41::i;:::-;50651:103;;;;-1:-1:-1;;;50651:103:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;50767:28;50777:4;50783:2;50787:7;50767:9;:28::i;48432:154::-;-1:-1:-1;;;;;48548:20:0;;48521:7;48548:20;;;:13;:20;;;;;:30;;48572:5;48548:23;:30::i;:::-;48541:37;;48432:154;;;;;:::o;50874:151::-;50978:39;50995:4;51001:2;51005:7;50978:39;;;;;;;;;;;;:16;:39::i;62085:174::-;62143:6;;-1:-1:-1;;;;;62143:6:0;62151:10;62143:18;62135:27;;;;;;62189:3;62181:6;:11;;62173:20;;;;;;62204:4;:13;;;62233:18;;;;;;;;;;;;;;;;;62085:174;:::o;48942:164::-;49009:7;;49051:22;:12;49067:5;49051:15;:22::i;:::-;-1:-1:-1;49029:44:0;48942:164;-1:-1:-1;;;48942:164:0:o;62000:77::-;62065:4;;62000:77;:::o;46701:169::-;46765:7;46792:70;46809:7;46792:70;;;;;;;;;;;;;;;;;:12;;:70;:16;:70::i;48259:89::-;48332:8;48325:15;;;;;;;;-1:-1:-1;;48325:15:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;48299:13;;48325:15;;48332:8;;48325:15;;48332:8;48325:15;;;;;;;;;;;;;;;;;;;;;;;;46424:215;46488:7;-1:-1:-1;;;;;46516:19:0;;46508:74;;;;-1:-1:-1;;;46508:74:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;46602:20:0;;;;;;:13;:20;;;;;:29;;:27;:29::i;61538:357::-;61608:7;61641:9;61654;61641:22;61633:65;;;;;-1:-1:-1;;;61633:65:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;61709:21;:9;:19;:21::i;:::-;61741:17;61761:19;:9;:17;:19::i;:::-;61741:39;;61791:32;61801:10;61813:9;61791;:32::i;:::-;61834:6;;:26;;-1:-1:-1;;;;;61834:6:0;;;;61850:9;61834:26;;;;;:6;:26;:6;:26;61850:9;61834:6;:26;;;;;;;;;;;;;;;;;;;;-1:-1:-1;61878:9:0;-1:-1:-1;61538:357:0;:::o;61906:82::-;61974:6;;-1:-1:-1;;;;;61974:6:0;61906:82;:::o;47098:96::-;47179:7;47172:14;;;;;;;;-1:-1:-1;;47172:14:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;47146:13;;47172:14;;47179:7;;47172:14;;47179:7;47172:14;;;;;;;;;;;;;;;;;;;;;;;;49909:295;50024:12;:10;:12::i;:::-;-1:-1:-1;;;;;50012:24:0;:8;-1:-1:-1;;;;;50012:24:0;;;50004:62;;;;;-1:-1:-1;;;50004:62:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;50124:8;50079:18;:32;50098:12;:10;:12::i;:::-;-1:-1:-1;;;;;50079:32:0;;;;;;;;;;;;;;;;;-1:-1:-1;50079:32:0;;;:42;;;;;;;;;;;;:53;;-1:-1:-1;;50079:53:0;;;;;;;;;;;50163:12;:10;:12::i;:::-;-1:-1:-1;;;;;50148:48:0;;50187:8;50148:48;;;;;;;;;;;;;;;;;;;;49909:295;;:::o;51096:285::-;51228:41;51247:12;:10;:12::i;:::-;51261:7;51228:18;:41::i;:::-;51220:103;;;;-1:-1:-1;;;51220:103:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;51334:39;51348:4;51354:2;51358:7;51367:5;51334:13;:39::i;:::-;51096:285;;;;:::o;47265:755::-;47330:13;47364:16;47372:7;47364;:16::i;:::-;47356:76;;;;-1:-1:-1;;;47356:76:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;47445:23;47471:19;;;:10;:19;;;;;;;;47445:45;;;;;;;;;;;-1:-1:-1;;47445:45:0;;;;;;;;;;;;;;;;;;;;;;;;;;;47471:19;;47445:45;;;47471:19;47445:45;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;47572:8:0;47566:22;47445:45;;-1:-1:-1;;;;47566:22:0;-1:-1:-1;;47566:22:0;;;;;;;;;;;47562:76;;47617:9;-1:-1:-1;47610:16:0;;47562:76;47742:23;;:27;47738:112;;47817:8;47827:9;47800:37;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;47800:37:0;;;;;;;;;;;;;;;;;;;-1:-1:-1;;47800:37:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;47786:52;;;;;47738:112;47982:8;47992:18;:7;:16;:18::i;:::-;47965:46;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;47965:46:0;;;;;;;;;;;;;;;;;;;-1:-1:-1;;47965:46:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;47951:61;;;47265:755;;;:::o;50275:156::-;-1:-1:-1;;;;;50388:25:0;;;50364:4;50388:25;;;:18;:25;;;;;;;;:35;;;;;;;;;;;;;;;50275:156::o;52848:119::-;52905:4;52929:30;:12;52951:7;52929:21;:30::i;663:106::-;751:10;663:106;:::o;58675:158::-;58741:24;;;;:15;:24;;;;;:29;;-1:-1:-1;;;;;;58741:29:0;-1:-1:-1;;;;;58741:29:0;;;;;;;;:24;;58795:16;58741:24;58795:7;:16::i;:::-;-1:-1:-1;;;;;58786:39:0;;;;;;;;;;;58675:158;;:::o;40329:123::-;40398:7;40425:19;40433:3;40425:7;:19::i;53134:333::-;53219:4;53244:16;53252:7;53244;:16::i;:::-;53236:73;;;;-1:-1:-1;;;53236:73:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;53320:13;53336:16;53344:7;53336;:16::i;:::-;53320:32;;53382:5;-1:-1:-1;;;;;53371:16:0;:7;-1:-1:-1;;;;;53371:16:0;;:51;;;;53415:7;-1:-1:-1;;;;;53391:31:0;:20;53403:7;53391:11;:20::i;:::-;-1:-1:-1;;;;;53391:31:0;;53371:51;:87;;;;53426:32;53443:5;53450:7;53426:16;:32::i;:::-;53363:96;53134:333;-1:-1:-1;;;;53134:333:0:o;56223:574::-;56341:4;-1:-1:-1;;;;;56321:24:0;:16;56329:7;56321;:16::i;:::-;-1:-1:-1;;;;;56321:24:0;;56313:78;;;;-1:-1:-1;;;56313:78:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;56410:16:0;;56402:65;;;;-1:-1:-1;;;56402:65:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;56480:39;56501:4;56507:2;56511:7;56480:20;:39::i;:::-;56584:29;56601:1;56605:7;56584:8;:29::i;:::-;-1:-1:-1;;;;;56626:19:0;;;;;;:13;:19;;;;;:35;;56653:7;56626:26;:35::i;:::-;-1:-1:-1;;;;;;56672:17:0;;;;;;:13;:17;;;;;:30;;56694:7;56672:21;:30::i;:::-;-1:-1:-1;56715:29:0;:12;56732:7;56741:2;56715:16;:29::i;:::-;;56781:7;56777:2;-1:-1:-1;;;;;56762:27:0;56771:4;-1:-1:-1;;;;;56762:27:0;;;;;;;;;;;56223:574;;;:::o;32926:137::-;32997:7;33032:22;33036:3;33048:5;33032:3;:22::i;40791:227::-;40871:7;;;;40931:22;40935:3;40947:5;40931:3;:22::i;:::-;40900:53;;;;-1:-1:-1;40791:227:0;-1:-1:-1;;;;;40791:227:0:o;41453:204::-;41560:7;41603:44;41608:3;41628;41634:12;41603:4;:44::i;:::-;41595:53;-1:-1:-1;41453:204:0;;;;;;:::o;60791:181::-;60945:19;;60963:1;60945:19;;;60791:181::o;60669:114::-;60761:14;;60669:114::o;53810:110::-;53886:26;53896:2;53900:7;53886:26;;;;;;;;;;;;:9;:26::i;:::-;53810:110;;:::o;52263:272::-;52377:28;52387:4;52393:2;52397:7;52377:9;:28::i;:::-;52424:48;52447:4;52453:2;52457:7;52466:5;52424:22;:48::i;:::-;52416:111;;;;-1:-1:-1;;;52416:111:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;41906:744;41962:13;42183:10;42179:53;;-1:-1:-1;42210:10:0;;;;;;;;;;;;-1:-1:-1;;;42210:10:0;;;;;;42179:53;42257:5;42242:12;42298:78;42305:9;;42298:78;;42331:8;;42362:2;42354:10;;;;42298:78;;;42386:19;42418:6;42408:17;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;42408:17:0;-1:-1:-1;42480:5:0;;-1:-1:-1;42386:39:0;-1:-1:-1;;;42452:10:0;;42496:115;42503:9;;42496:115;;42570:2;42563:4;:9;42558:2;:14;42547:27;;42529:6;42536:7;;;;;;;42529:15;;;;;;;;;;;:45;-1:-1:-1;;;;;42529:45:0;;;;;;;;-1:-1:-1;42597:2:0;42589:10;;;;42496:115;;;-1:-1:-1;42635:6:0;41906:744;-1:-1:-1;;;;41906:744:0:o;40090:151::-;40174:4;40198:35;40208:3;40228;40198:9;:35::i;62267:285::-;62377:45;62404:4;62410:2;62414:7;62377:26;:45::i;:::-;-1:-1:-1;;;;;62437:18:0;;62433:112;;62497:4;;62481:13;:11;:13::i;:::-;:20;62473:60;;;;;-1:-1:-1;;;62473:60:0;;;;;;;;;;;;;;;;;;;;;;;;;;;32013:137;32083:4;32107:35;32115:3;32135:5;32107:7;:35::i;31706:131::-;31773:4;31797:32;31802:3;31822:5;31797:4;:32::i;39522:176::-;39611:4;39635:55;39640:3;39660;-1:-1:-1;;;;;39674:14:0;;39635:4;:55::i;28000:204::-;28095:18;;28067:7;;28095:26;-1:-1:-1;28087:73:0;;;;-1:-1:-1;;;28087:73:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;28178:3;:11;;28190:5;28178:18;;;;;;;;;;;;;;;;28171:25;;28000:204;;;;:::o;38177:279::-;38281:19;;38244:7;;;;38281:27;-1:-1:-1;38273:74:0;;;;-1:-1:-1;;;38273:74:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;38360:22;38385:3;:12;;38398:5;38385:19;;;;;;;;;;;;;;;;;;38360:44;;38423:5;:10;;;38435:5;:12;;;38415:33;;;;;38177:279;;;;;:::o;38879:319::-;38973:7;39012:17;;;:12;;;:17;;;;;;39063:12;39048:13;39040:36;;;;-1:-1:-1;;;39040:36:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;39130:3;:12;;39154:1;39143:8;:12;39130:26;;;;;;;;;;;;;;;;;;:33;;;39123:40;;;38879:319;;;;;:::o;54147:250::-;54243:18;54249:2;54253:7;54243:5;:18::i;:::-;54280:54;54311:1;54315:2;54319:7;54328:5;54280:22;:54::i;:::-;54272:117;;;;-1:-1:-1;;;54272:117:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;58063:604;58184:4;58211:15;:2;-1:-1:-1;;;;;58211:13:0;;:15::i;:::-;58206:60;;-1:-1:-1;58250:4:0;58243:11;;58206:60;58276:23;58302:252;-1:-1:-1;;;58415:12:0;:10;:12::i;:::-;58442:4;58461:7;58483:5;58318:181;;;;;;-1:-1:-1;;;;;58318:181:0;;;;;;-1:-1:-1;;;;;58318:181:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;58318:181:0;;;;;;;-1:-1:-1;;;;;58318:181:0;;;;;;;;;;;58302:252;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;58302:15:0;;;:252;:15;:252::i;:::-;58276:278;;58565:13;58592:10;58581:32;;;;;;;;;;;;;;;-1:-1:-1;58581:32:0;-1:-1:-1;;;;;;58632:26:0;-1:-1:-1;;;58632:26:0;;-1:-1:-1;;;58063:604:0;;;;;;:::o;37492:125::-;37563:4;37587:17;;;:12;;;;;:17;;;;;;:22;;;37492:125::o;25702:1544::-;25768:4;25907:19;;;:12;;;:19;;;;;;25943:15;;25939:1300;;26378:18;;-1:-1:-1;;26329:14:0;;;;26378:22;;;;26305:21;;26378:3;;:22;;26665;;;;;;;;;;;;;;26645:42;;26811:9;26782:3;:11;;26794:13;26782:26;;;;;;;;;;;;;;;;;;;:38;;;;26888:23;;;26930:1;26888:12;;;:23;;;;;;26914:17;;;26888:43;;27040:17;;26888:3;;27040:17;;;;;;;;;;;;;;;;;;;;;;27135:3;:12;;:19;27148:5;27135:19;;;;;;;;;;;27128:26;;;27178:4;27171:11;;;;;;;;25939:1300;27222:5;27215:12;;;;;25112:414;25175:4;25197:21;25207:3;25212:5;25197:9;:21::i;:::-;25192:327;;-1:-1:-1;25235:23:0;;;;;;;;:11;:23;;;;;;;;;;;;;25418:18;;25396:19;;;:12;;;:19;;;;;;:40;;;;25451:11;;25192:327;-1:-1:-1;25502:5:0;25495:12;;34992:692;35068:4;35203:17;;;:12;;;:17;;;;;;35237:13;35233:444;;-1:-1:-1;;35322:38:0;;;;;;;;;;;;;;;;;;35304:57;;;;;;;;:12;:57;;;;;;;;;;;;;;;;;;;;;;;;35519:19;;35499:17;;;:12;;;:17;;;;;;;:39;35553:11;;35233:444;35633:5;35597:3;:12;;35621:1;35610:8;:12;35597:26;;;;;;;;;;;;;;;;;;:33;;:41;;;;35660:5;35653:12;;;;;54733:404;-1:-1:-1;;;;;54813:16:0;;54805:61;;;;;-1:-1:-1;;;54805:61:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;54886:16;54894:7;54886;:16::i;:::-;54885:17;54877:58;;;;;-1:-1:-1;;;54877:58:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;54948:45;54977:1;54981:2;54985:7;54948:20;:45::i;:::-;-1:-1:-1;;;;;55006:17:0;;;;;;:13;:17;;;;;:30;;55028:7;55006:21;:30::i;:::-;-1:-1:-1;55049:29:0;:12;55066:7;55075:2;55049:16;:29::i;:::-;-1:-1:-1;55096:33:0;;55121:7;;-1:-1:-1;;;;;55096:33:0;;;55113:1;;55096:33;;55113:1;;55096:33;54733:404;;:::o;17137:422::-;17504:20;17543:8;;;17137:422::o;20055:195::-;20158:12;20190:52;20212:6;20220:4;20226:1;20229:12;20158;21359:18;21370:6;21359:10;:18::i;:::-;21351:60;;;;;-1:-1:-1;;;21351:60:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;21485:12;21499:23;21526:6;-1:-1:-1;;;;;21526:11:0;21546:5;21554:4;21526:33;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;21526:33:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;21484:75;;;;21577:52;21595:7;21604:10;21616:12;21577:17;:52::i;:::-;21570:59;21107:530;-1:-1:-1;;;;;;;21107:530:0:o;22643:742::-;22758:12;22787:7;22783:595;;;-1:-1:-1;22818:10:0;22811:17;;22783:595;22932:17;;:21;22928:439;;23195:10;23189:17;23256:15;23243:10;23239:2;23235:19;23228:44;23143:148;23331:20;;-1:-1:-1;;;23331:20:0;;;;;;;;;;;;;;;;;23338:12;;23331:20;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

Swarm Source

ipfs://7e20a338366dcc6f750d2eb398350f18476a0a9508d7fe1fe071ae95fa85a15e

A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.

Tools & Services