Contract Name:
LimitedSupplyMintingExtension
Contract Source Code:
File 1 of 1 : LimitedSupplyMintingExtension
// SPDX-License-Identifier: MIXED
// Sources flattened with hardhat v2.9.3 https://hardhat.org
// File @openzeppelin/contracts/utils/[email protected]
// License-Identifier: MIT
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;
}
}
// File @openzeppelin/contracts/access/[email protected]
// License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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() {
_setOwner(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// License-Identifier: MIT
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);
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @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;
}
}
// File contracts/interfaces/INFTExtension.sol
// License-Identifier: MIT
pragma solidity ^0.8.9;
interface INFTExtension is IERC165 {
}
interface INFTURIExtension is INFTExtension {
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// License-Identifier: MIT
pragma solidity ^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 contracts/interfaces/IMetaverseNFT.sol
// License-Identifier: MIT
pragma solidity ^0.8.9;
interface IAvatarNFT {
function DEVELOPER() external pure returns (string memory _url);
function DEVELOPER_ADDRESS() external pure returns (address payable _dev);
// ------ View functions ------
function saleStarted() external view returns (bool);
function isExtensionAdded(address extension) external view returns (bool);
/**
Extra information stored for each tokenId. Optional, provided on mint
*/
function data(uint256 tokenId) external view returns (bytes32);
// ------ Mint functions ------
/**
Mint from NFTExtension contract. Optionally provide data parameter.
*/
function mintExternal(
uint256 tokenId,
address to,
bytes32 data
) external payable;
// ------ Admin functions ------
function addExtension(address extension) external;
function revokeExtension(address extension) external;
function withdraw() external;
}
interface IMetaverseNFT is IAvatarNFT {
// ------ View functions ------
/**
Recommended royalty for tokenId sale.
*/
function royaltyInfo(uint256 tokenId, uint256 salePrice)
external
view
returns (address receiver, uint256 royaltyAmount);
// ------ Admin functions ------
function setRoyaltyReceiver(address receiver) external;
function setRoyaltyFee(uint256 fee) external;
}
// File contracts/extensions/base/NFTExtension.sol
// License-Identifier: MIT
pragma solidity ^0.8.9;
contract NFTExtension is INFTExtension, ERC165 {
IMetaverseNFT public immutable nft;
constructor(address _nft) {
nft = IMetaverseNFT(_nft);
}
function beforeMint() internal view {
require(nft.isExtensionAdded(address(this)), "NFTExtension: this contract is not allowed to be used as an extension");
}
function supportsInterface(bytes4 interfaceId) public virtual override(IERC165, ERC165) view returns (bool) {
return interfaceId == type(INFTExtension).interfaceId || super.supportsInterface(interfaceId);
}
}
// File contracts/extensions/base/SaleControl.sol
// License-Identifier: MIT
pragma solidity ^0.8.9;
abstract contract SaleControl is Ownable {
uint256 public constant __SALE_NEVER_STARTS = 2**256 - 1;
uint256 public startTimestamp = __SALE_NEVER_STARTS;
modifier whenSaleStarted {
require(saleStarted(), "Sale not started yet");
_;
}
function updateStartTimestamp(uint256 _startTimestamp) public onlyOwner {
startTimestamp = _startTimestamp;
}
function startSale() public onlyOwner {
startTimestamp = block.timestamp;
}
function stopSale() public onlyOwner {
startTimestamp = __SALE_NEVER_STARTS;
}
function saleStarted() public view returns (bool) {
return block.timestamp >= startTimestamp;
}
}
// File contracts/extensions/LimitedSupplyMintingExtension.sol
// License-Identifier: MIT
pragma solidity ^0.8.9;
interface NFT is IMetaverseNFT {
function maxSupply() external view returns (uint256);
function totalSupply() external view returns (uint256);
}
contract LimitedSupplyMintingExtension is NFTExtension, Ownable, SaleControl {
uint256 public price;
uint256 public maxPerMint;
uint256 public maxPerWallet;
uint256 public totalMinted;
uint256 public extensionSupply;
constructor(address _nft, uint256 _price, uint256 _maxPerMint, uint256 _maxPerWallet, uint256 _extensionSupply) NFTExtension(_nft) {
stopSale();
// sale stopped by default
price = _price;
maxPerMint = _maxPerMint;
maxPerWallet = _maxPerWallet;
extensionSupply = _extensionSupply;
}
function mint(uint256 nTokens) external whenSaleStarted payable {
require(IERC721(address(nft)).balanceOf(msg.sender) + nTokens <= maxPerWallet, "LimitedSupplyMintingExtension: max per wallet reached");
require(nTokens + totalMinted <= extensionSupply, "max extensionSupply reached");
require(nTokens <= maxPerMint, "Too many tokens to mint");
require(msg.value >= nTokens * price, "Not enough ETH to mint");
totalMinted += nTokens;
nft.mintExternal{ value: msg.value }(nTokens, msg.sender, bytes32(0x0));
}
function maxSupply() public view returns (uint256) {
return NFT(address(nft)).maxSupply();
}
function totalSupply() public view returns (uint256) {
return NFT(address(nft)).totalSupply();
}
}