Contract Name:
MegaplexPass
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import './ERC721Batch.sol';
import './Delegated.sol';
import './Royalties.sol';
contract MegaplexPass is ERC721Batch, Delegated, Royalties {
using Address for address;
using Strings for uint256;
struct MintConfig{
uint64 ethPrice;
uint16 maxMint;
uint16 maxOrder;
uint16 maxSupply;
SaleState saleState;
}
enum SaleState{
NONE,
MAINSALE
}
MintConfig public config = MintConfig(
0.25 ether, //ethPrice
300, //maxMint
300, //maxOrder
300, //maxSupply
SaleState.NONE
);
string public tokenURIPrefix;
string public tokenURISuffix;
address payable public treasury = payable(0x2Be23419b258c3c82EE0C0E41B4a9C600e8860bd);
constructor()
Delegated()
ERC721B("Megaplex Pass", "MP")
Royalties( treasury, 1000, 10000 ){
setDelegate(treasury, true);
}
//payable
function mint( uint16 quantity ) external payable {
require( quantity > 0, "Must order 1+" );
MintConfig memory cfg = config;
require( cfg.saleState == SaleState.MAINSALE, "Sale is not active" );
require( quantity <= cfg.maxOrder, "Order too big" );
Owner memory prev = owners[msg.sender];
require( prev.purchased + quantity <= cfg.maxMint, "Mint limit reached" );
uint supply = totalSupply();
require( supply + quantity <= cfg.maxSupply, "Mint/Order exceeds supply" );
require( msg.value == cfg.ethPrice * quantity, "Ether sent is not correct" );
unchecked{
owners[msg.sender] = Owner(
prev.balance + quantity,
prev.purchased + quantity
);
for(uint256 i; i < quantity; ++i ){
_mint( msg.sender, supply + i );
}
}
Address.sendValue(treasury, msg.value);
}
//onlyDelegates
function mintTo(uint16[] calldata quantity, address[] calldata recipient) external payable onlyDelegates{
require(quantity.length == recipient.length, "Must provide equal quantities and recipients" );
uint256 totalQuantity = 0;
unchecked{
for(uint256 i = 0; i < quantity.length; ++i){
totalQuantity += quantity[i];
}
}
uint supply = totalSupply();
require( supply + totalQuantity <= config.maxSupply, "Mint/order exceeds supply" );
unchecked{
for(uint256 i; i < recipient.length; ++i){
owners[recipient[i]].balance += quantity[i];
for(uint256 j; j < quantity[i]; ++j ){
_mint( recipient[i], supply + j );
}
}
}
}
function setConfig( MintConfig calldata newConfig ) external onlyDelegates{
require( newConfig.maxOrder <= newConfig.maxSupply, "max order must be lte max supply" );
require( totalSupply() <= newConfig.maxSupply, "max supply must be gte total supply" );
require( newConfig.saleState <= type(SaleState).max, "invalid sale state" );
config = newConfig;
}
function setTokenURI( string calldata prefix, string calldata suffix ) external onlyDelegates{
tokenURIPrefix = prefix;
tokenURISuffix = suffix;
}
//only owner or treasury
function setDefaultRoyalty( uint16 feeNumerator, uint16 feeDenominator ) external {
require(msg.sender == treasury || msg.sender == owner(), "Only the treasury or owner can set royalties");
_setDefaultRoyalty( treasury, feeNumerator, feeDenominator );
}
//only treasure
function setTreasury( address payable newTreasury ) external {
require(msg.sender == treasury, "Only the current treasury can set a successor");
_setDefaultRoyalty( newTreasury, defaultRoyalty.fraction.numerator, defaultRoyalty.fraction.denominator );
treasury = newTreasury;
}
//view: IERC165
function supportsInterface(bytes4 interfaceId) public view override(ERC721EnumerableB, Royalties) returns (bool) {
return ERC721EnumerableB.supportsInterface(interfaceId)
|| Royalties.supportsInterface(interfaceId);
}
//view: IERC721Metadata
function tokenURI( uint256 tokenId ) external view returns( string memory ){
require(_exists(tokenId), "query for nonexistent token");
return string(abi.encodePacked(tokenURIPrefix, tokenId.toString(), tokenURISuffix));
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/interfaces/IERC2981.sol";
contract Royalties is IERC2981{
struct Fraction{
uint16 numerator;
uint16 denominator;
}
struct Royalty{
address receiver;
Fraction fraction;
}
Royalty public defaultRoyalty;
//mapping(uint => Royalty) public tokenRoyalties;
constructor( address receiver, uint16 royaltyNum, uint16 royaltyDenom ){
_setDefaultRoyalty( receiver, royaltyNum, royaltyDenom );
}
//view: IERC2981
/**
* @dev See {IERC2981-royaltyInfo}.
**/
function royaltyInfo(uint256, uint256 _salePrice) external view virtual returns (address, uint256) {
/*
Royalty memory royalty = _tokenRoyaltyInfo[_tokenId];
if (royalty.receiver == address(0)) {
royalty = _defaultRoyaltyInfo;
}
*/
uint256 royaltyAmount = (_salePrice * defaultRoyalty.fraction.numerator) / defaultRoyalty.fraction.denominator;
return (defaultRoyalty.receiver, royaltyAmount);
}
//view: IERC165
/**
* @dev See {IERC165-supportsInterface}.
**/
function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
return interfaceId == type(IERC2981).interfaceId;
}
function _setDefaultRoyalty( address receiver, uint16 royaltyNum, uint16 royaltyDenom ) internal {
defaultRoyalty.receiver = receiver;
defaultRoyalty.fraction = Fraction(royaltyNum, royaltyDenom);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
interface IERC721Batch {
function isOwnerOf( address account, uint[] calldata tokenIds ) external view returns( bool );
function safeTransferBatch( address from, address to, uint[] calldata tokenIds, bytes calldata data ) external;
function transferBatch( address from, address to, uint[] calldata tokenIds ) external;
function walletOfOwner( address account ) external view returns( uint[] memory );
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol";
import "./ERC721B.sol";
abstract contract ERC721EnumerableB is ERC721B, IERC721Enumerable {
function supportsInterface( bytes4 interfaceId ) public view virtual override(ERC721B, IERC165) returns( bool ){
return interfaceId == type(IERC721Enumerable).interfaceId
|| super.supportsInterface( interfaceId );
}
function tokenOfOwnerByIndex( address owner, uint256 index ) external view returns( uint256 ){
require( owners[ owner ].balance > index, "ERC721EnumerableB: owner index out of bounds" );
uint256 count;
uint256 tokenId;
for( tokenId = 0; tokenId < 8888; ++tokenId ){
if( owner != tokens[tokenId] )
continue;
if( index == count++ )
break;
}
return tokenId;
}
function tokenByIndex( uint256 index ) external view returns( uint256 ){
require( _exists( index ), "ERC721EnumerableB: query for nonexistent token");
return index;
}
function totalSupply() public view returns( uint256 ){
return _supply;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
import "./IERC721Batch.sol";
import "./ERC721EnumerableB.sol";
abstract contract ERC721Batch is ERC721EnumerableB, IERC721Batch {
function isOwnerOf( address account, uint[] calldata tokenIds ) external view returns( bool ){
for(uint i; i < tokenIds.length; ++i ){
if( account != tokens[ tokenIds[i] ] )
return false;
}
return true;
}
function safeTransferBatch( address from, address to, uint256[] calldata tokenIds, bytes calldata data ) external{
for(uint i; i < tokenIds.length; ++i ){
safeTransferFrom( from, to, tokenIds[i], data );
}
}
function transferBatch( address from, address to, uint256[] calldata tokenIds ) external{
for(uint i; i < tokenIds.length; ++i ){
transferFrom( from, to, tokenIds[i] );
}
}
function walletOfOwner( address account ) external view returns( uint[] memory ){
uint256 count;
uint256 quantity = owners[ account ].balance;
uint256[] memory wallet = new uint[]( quantity );
for( uint i = 0; i < 8888; ++i ){
if( account == tokens[i] ){
wallet[ count++ ] = i;
if( count == quantity )
break;
}
}
return wallet;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
abstract contract ERC721B is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
struct Owner{
uint16 balance;
uint16 purchased;
}
mapping(uint256 => address) public tokens;
mapping(address => Owner) public owners;
uint256 internal _supply;
string private _name;
string private _symbol;
mapping(uint256 => address) internal _tokenApprovals;
mapping(address => mapping(address => bool)) private _operatorApprovals;
constructor(string memory name_, string memory symbol_ ){
_name = name_;
_symbol = symbol_;
}
//public view
function balanceOf(address owner) external view returns( uint256 balance ){
require(owner != address(0), "ERC721B: balance query for the zero address");
return owners[owner].balance;
}
function name() external view returns( string memory name_ ){
return _name;
}
function ownerOf(uint256 tokenId) public virtual view returns( address owner ){
require(_exists(tokenId), "ERC721B: query for nonexistent token");
return tokens[tokenId];
}
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns( bool isSupported ){
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
function symbol() external view returns( string memory symbol_ ){
return _symbol;
}
//approvals
function approve(address to, uint tokenId) external{
address owner = tokens[tokenId];
require(to != owner, "ERC721B: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721B: caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
function getApproved(uint256 tokenId) public view returns( address approver ){
require(_exists(tokenId), "ERC721: query for nonexistent token");
return _tokenApprovals[tokenId];
}
function isApprovedForAll(address owner, address operator) public view returns( bool isApproved ){
return _operatorApprovals[owner][operator];
}
function setApprovalForAll(address operator, bool approved) external{
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
//transfers
function safeTransferFrom(address from, address to, uint256 tokenId) external{
safeTransferFrom(from, to, tokenId, "");
}
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public{
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721B: caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
function transferFrom(address from, address to, uint256 tokenId) public{
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721B: caller is not owner nor approved");
_transfer(from, to, tokenId);
}
//internal
function _approve(address to, uint tokenId) internal{
_tokenApprovals[tokenId] = to;
emit Approval(tokens[tokenId], to, tokenId);
}
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data) private returns( bool ){
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721B: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
function _exists(uint256 tokenId) internal view returns( bool ){
return tokens[tokenId] != address(0);
}
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns( bool isApproved ){
require(_exists(tokenId), "ERC721B: query for nonexistent token");
address owner = tokens[tokenId];
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
function _mint( address to, uint256 tokenId ) internal{
require(!_exists(tokenId), "ERC721B: mint for existing token");
++_supply;
tokens[ tokenId ] = to;
emit Transfer( address(0), to, tokenId );
}
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal{
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721B: transfer to non ERC721Receiver implementer");
}
function _transfer(address from, address to, uint256 tokenId) internal virtual{
require(tokens[tokenId] == from, "ERC721B: transfer of token that is not own");
// Clear approvals from the previous owner
delete _tokenApprovals[tokenId];
unchecked{
--owners[from].balance;
++owners[to].balance;
}
tokens[tokenId] = to;
emit Transfer(from, to, tokenId);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.8.9;
import "@openzeppelin/contracts/access/Ownable.sol";
contract Delegated is Ownable{
mapping(address => bool) internal _delegates;
modifier onlyDelegates {
require(_delegates[msg.sender], "Invalid delegate" );
_;
}
constructor()
Ownable(){
setDelegate( owner(), true );
}
//onlyOwner
function isDelegate( address addr ) external view onlyOwner returns( bool ){
return _delegates[addr];
}
function setDelegate( address addr, bool isDelegate_ ) public onlyOwner{
_delegates[addr] = isDelegate_;
}
function transferOwnership(address newOwner) public override onlyOwner {
super.transferOwnership( newOwner );
setDelegate( owner(), true );
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal 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);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://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");
(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");
(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");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @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);
/**
* @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^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 `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @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`.
*
* 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;
/**
* @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 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 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 the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @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);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)
pragma solidity ^0.8.0;
import "../utils/introspection/IERC165.sol";
/**
* @dev Interface for the NFT Royalty Standard.
*
* A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
* support for royalty payments across all NFT marketplaces and ecosystem participants.
*
* _Available since v4.5._
*/
interface IERC2981 is IERC165 {
/**
* @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
* exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
*/
function royaltyInfo(uint256 tokenId, uint256 salePrice)
external
view
returns (address receiver, uint256 royaltyAmount);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}