Contract Name:
WhIsBeVandalz
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
// interfaces
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import { IERC2981 } from "@openzeppelin/contracts/interfaces/IERC2981.sol";
// library
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import { Errors } from "./types/Errors.sol";
import { Constants } from "./Constants.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
// contracts
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
import { ERC165Storage } from "@openzeppelin/contracts/utils/introspection/ERC165Storage.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./ERC721RandomlyAssignVandalzTier.sol";
interface IGoodKarmaToken {
function burnTokenForVandal(address holderAddress) external;
}
// solhint-disable
// // // // // // // // // // // // // // // // // // // // // //
// ██╗ ██╗ █████╗ ███╗ ██╗██████╗ █████╗ ██╗ ███████╗ //
// ██║ ██║██╔══██╗████╗ ██║██╔══██╗██╔══██╗██║ ╚══███╔╝ //
// ██║ ██║███████║██╔██╗ ██║██║ ██║███████║██║ ███╔╝ //
// ╚██╗ ██╔╝██╔══██║██║╚██╗██║██║ ██║██╔══██║██║ ███╔╝ //
// ╚████╔╝ ██║ ██║██║ ╚████║██████╔╝██║ ██║███████╗███████╗ //
// ╚═══╝ ╚═╝ ╚═╝╚═╝ ╚═══╝╚═════╝ ╚═╝ ╚═╝╚══════╝╚══════╝ //
// // // // // // // // // // // // // // // // // // // // // //
// solhint-enable
/**
* @title tirewise random assignment contract for vandalz
* @author
*/
contract WhIsBeVandalz is
ERC721,
Ownable,
ERC721RandomlyAssignVandalzTier,
ERC721Holder,
ERC721Burnable,
ERC165Storage,
IERC2981
{
//==Type declarations==//
using Strings for uint256;
using SafeERC20 for IERC20;
//==state variables==//
/**
* @notice
* @dev
*/
uint256 public publicSalePrice;
/**
* @notice
* @dev
*/
bool public publicMintPaused = true;
/**
* @notice
* @dev
*/
bool public whitelistState = true;
/**
* @notice
* @dev
*/
bool public revealed = true;
/**
* @notice
* @dev
*/
bool public redeemPaused = true;
/**
* @notice
* @dev
*/
bool public includeTier1 = false;
/**
* @notice list of allowlist address hashed
* @dev the merkle root hash allowlist
*/
bytes32 public merkleRoot;
address public royaltyAddress;
uint256 public royaltyPercent;
/**
* @notice
* @dev
*/
uint256[] public groupTier15678Indexes;
/**
* @notice
* @dev
*/
uint256[] public groupTier5678Indexes;
/**
* @notice
* @dev
*/
string public baseURI;
/**
* @notice
* @dev
*/
string public baseExtension = ".json";
/**
* @notice
* @dev
*/
string public notRevealedUri;
/**
* @notice
* @dev
*/
mapping(address => bool) public acceptedCollections;
/**
* @notice nft burn tracker
* @dev increments the counter whenever nft is redeemed
*/
mapping(address => uint256) public burnCounter;
/**
* @notice public mint tracker per wallet
* @dev maps amount of "publicly" minted vandalz per wallet
*/
mapping(address => uint256) public publicMintCounter;
//==Constants==//
// bytes4 constants for ERC165
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
bytes4 private constant _INTERFACE_ID_IERC2981 = 0x2a55205a;
bytes4 private constant _INTERFACE_ID_IERC721Metadata = 0x5b5e139f;
/**
* @notice number of tiers
* @dev the length of `_tiers` array in constructor should exactly match this number
*/
uint256 public constant TIERS = uint256(8);
//==events==//
event UpdatedRoyalties(address newRoyaltyAddress, uint256 newPercentage);
//==Modifiers==//
/**
* @dev Throws if timestamp already set.
*/
modifier publicMintNotPaused() {
require(publicMintPaused == false, "Public mint is paused");
_;
}
/**
* @dev Throws if timestamp already set.
*/
modifier redeemNotPaused() {
require(redeemPaused == false, "Redeem is paused");
_;
}
//===Constructor===//
/**
* @notice
* @dev
* @param _name name of the collection
* @param _symbol symbol of the collection
* @param _totalSupply maximum pieces if the collection
* @param _startFrom first token ID of collection
* @param _tiers list of tier details
* @param _initBaseURI x
* @param _initNotRevealedUri v
*/
constructor(
string memory _name,
string memory _symbol,
uint256 _totalSupply,
uint256 _startFrom,
DataTypes.Tier[] memory _tiers,
string memory _initBaseURI,
string memory _initNotRevealedUri
) ERC721(_name, _symbol) ERC721RandomlyAssignVandalzTier(_totalSupply, _startFrom) {
uint256 _tiersLen = _tiers.length;
if (_tiersLen != TIERS) {
revert Errors.WhisbeVandalz__EightTiersRequired(_tiersLen);
}
baseURI = _initBaseURI;
// no reveal uri
notRevealedUri = _initNotRevealedUri;
// whitelisted collections
acceptedCollections[address(Constants.EXTINCTION_OPEN_EDITION_BY_WHISBE)] = true;
acceptedCollections[address(Constants.THE_HORNED_KARMA_CHAMELEON_BURN_REDEMPTION_BY_WHISBE)] = true;
acceptedCollections[address(Constants.KARMA_KEY_BLACK_BY_WHISBE)] = true;
acceptedCollections[address(Constants.KARMA_KEYS_BY_WHISBE)] = true;
acceptedCollections[address(Constants.GOOD_KARMA_TOKEN)] = true;
// tiers
for (uint256 _i; _i < _tiersLen; _i++) {
tiers.push(_tiers[_i]);
}
// custom : group tiers 1,5,6,7,& 8
groupTier15678Indexes.push(0); // tier1 , group index -> 0
groupTier15678Indexes.push(4); // tier5 , group index -> 1
groupTier15678Indexes.push(5); // tier6 , group index -> 2
groupTier15678Indexes.push(6); // tier7 , group index -> 3
groupTier15678Indexes.push(7); // tier8 , group index -> 4
// custom : group tiers 5,6,7,& 8
groupTier5678Indexes.push(4); // tier5 , group index -> 0
groupTier5678Indexes.push(5); // tier6 , group index -> 1
groupTier5678Indexes.push(6); // tier7 , group index -> 2
groupTier5678Indexes.push(7); // tier8 , group index -> 3
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_IERC2981);
_registerInterface(_INTERFACE_ID_IERC721Metadata);
_setRoyalties(msg.sender, 1100); // 11% royalty
}
//===receive function===//
receive() external payable {
publicMint(new bytes32[](0));
}
//===External functions===//
/**
* @notice
* @dev
*/
function redeem(address[] memory _collections, uint256[][] memory _tokenIds) external redeemNotPaused {
uint256 _collectionsLen = _collections.length;
require(_collectionsLen == _tokenIds.length, "");
for (uint256 _j; _j < _collectionsLen; _j++) {
if (!acceptedCollections[_collections[_j]]) {
revert Errors.WhisbeVandalz__InvalidCollection(_collections[_j]);
}
uint256 _tokenIdsLen = _tokenIds[_j].length;
burnCounter[_collections[_j]] += _tokenIdsLen;
for (uint256 _i; _i < _tokenIdsLen; _i++) {
// transfer ownership or burn
if (_collections[_j] == Constants.EXTINCTION_OPEN_EDITION_BY_WHISBE) {
ERC721Burnable(_collections[_j]).safeTransferFrom(msg.sender, address(this), _tokenIds[_j][_i]);
} else if (_collections[_j] == Constants.GOOD_KARMA_TOKEN) {
IGoodKarmaToken(_collections[_j]).burnTokenForVandal(msg.sender);
} else {
ERC721Burnable(_collections[_j]).burn(_tokenIds[_j][_i]);
}
// mint Vandalz
_mintRandomVandalz(msg.sender, _collections[_j]);
}
}
}
/**
* @notice
* @dev
*/
function airDropToOG(address[] memory _tos) external onlyOwner {
if (includeTier1) {
for (uint256 _i; _i < _tos.length; _i++) {
_handleMintRandomlyFromTierGroup15678(_tos[_i], 1);
}
} else {
for (uint256 _i; _i < _tos.length; _i++) {
_handleMintRandomlyFromTierGroup5678(_tos[_i], 1);
}
}
}
/**
* @notice
* @dev
*/
function creatorMint(address _to, uint256[] memory _tokenIds) external onlyOwner {
for (uint256 _i; _i < _tokenIds.length; _i++) {
_internalCreatorMint(_to, _tokenIds[_i]);
}
}
/**
* @notice
* @dev
*/
function _internalCreatorMint(address _to, uint256 _tokenId) internal ensureAvailability {
_updateTierTokenCount(_tokenId);
_safeMint(_to, _tokenId);
}
/**
* @notice
* @dev
*/
function setSupply(uint256 _supply) external onlyOwner {
_setSupply(_supply);
}
/**
* @notice
* @dev
*/
function setTier(
uint256[] memory _tierIndex,
uint256[] memory _from,
uint256[] memory _to
) external onlyOwner {
require(
_tierIndex.length == _from.length && _from.length == _to.length,
"WhisbeVandalz: tier details length mismatch"
);
for (uint256 _i; _i < _tierIndex.length; _i++) {
require(_tierIndex[_i] < TIERS, "WhisbeVandalz: tierIndex exceeds max permitted tiers");
_setTier(_tierIndex[_i], _from[_i], _to[_i]);
}
}
/**
* @notice
* @dev
*/
function reveal() external onlyOwner {
revealed = true;
}
/**
* @notice
* @dev
*/
function setPublicSalePrice(uint256 _publicSalePrice) external onlyOwner {
publicSalePrice = _publicSalePrice;
}
/**
* @notice
* @dev
*/
function setBaseExtension(string memory _newBaseExtension) external onlyOwner {
baseExtension = _newBaseExtension;
}
/**
* @notice
* @dev
*/
function pauseRedeem(bool _state) external onlyOwner {
redeemPaused = _state;
}
/**
* @notice
* @dev
*/
function pausePublicMint(bool _state) external onlyOwner {
publicMintPaused = _state;
}
/**
* @notice
* @dev
*/
function setWhitelistState(bool _state) external onlyOwner {
whitelistState = _state;
}
/**
* @notice
* @dev
*/
function setIncludeTier1(bool _includeTier1) external onlyOwner {
includeTier1 = _includeTier1;
}
/**
* @notice
* @dev
*/
function updateMerkleRoot(bytes32 _merkleRoot) external onlyOwner {
merkleRoot = _merkleRoot;
}
/**
* @notice
* @dev
*/
function setBaseURI(string memory _newBaseURI) external onlyOwner {
baseURI = _newBaseURI;
}
/**
* @notice
* @dev
*/
function setNotRevealedURI(string memory _notRevealedURI) external onlyOwner {
notRevealedUri = _notRevealedURI;
}
/**
* @notice
* @dev
*/
function withdrawETH() external onlyOwner {
payable(msg.sender).transfer(address(this).balance);
}
/**
* @notice Transfer accidentally locked ERC20 tokens
* @dev can be called by owner only.
* @param _token - ERC20 token address.
* @param _amount - ERC20 token amount.
*/
function transferAccidentallyLockedTokens(IERC20 _token, uint256 _amount) external onlyOwner {
require(address(_token) != address(0), "Token address can not be zero");
// Transfer the amount of the specified ERC20 tokens, to the owner of this contract
_token.safeTransfer(msg.sender, _amount);
}
function setRoyaltyInfo(address $royaltyAddress, uint256 $percentage) external onlyOwner {
_setRoyalties($royaltyAddress, $percentage);
emit UpdatedRoyalties($royaltyAddress, $percentage);
}
//===Public functions===//
/**
* @notice
* @dev
* @param _proof a
*/
function publicMint(bytes32[] memory _proof) public payable publicMintNotPaused {
// Notes: 1592 will be comprised of Tier 3 pieces (approximately 650pieces)
// Remaining pieces chosen from Tier 1/5/6/7/8
// cannot mint more than two Vandalz
if (publicMintCounter[msg.sender] >= 2) {
revert Errors.WhisbeVandalz__PublicMintUpToTwoPerWallet();
}
require(msg.value == publicSalePrice, "WhisbeVandalz: eth value should be equal to publicSalePrice");
if (whitelistState) {
_isWhitelistedAddress(_proof);
}
_safeMint(msg.sender, _nextToken());
publicMintCounter[msg.sender] += 1;
}
//===Public view functions===//
function royaltyInfo(uint256, uint256 $salePrice)
public
view
override(IERC2981)
returns (address _receiver, uint256 _royaltyAmount)
{
_receiver = royaltyAddress;
// This sets percentages by price * percentage / 10000
_royaltyAmount = ($salePrice * royaltyPercent) / 10000;
}
function supportsInterface(bytes4 $interfaceId)
public
view
override(ERC165Storage, ERC721, IERC165)
returns (bool)
{
return super.supportsInterface($interfaceId);
}
/**
* @notice
* @dev
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
if (revealed == false) {
return notRevealedUri;
}
string memory currentBaseURI = _baseURI();
return
bytes(currentBaseURI).length > 0
? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
: "";
}
/**
* @notice
* @dev
*/
function getBlockTimestamp() public view virtual returns (uint256) {
return block.timestamp;
}
//===Internal functions===//
function _setRoyalties(address $receiver, uint256 $percentage) internal {
royaltyAddress = $receiver;
royaltyPercent = $percentage;
}
/**
* @notice
* @dev
*/
function _mintRandomVandalz(address _to, address _collection) internal {
if (_collection == Constants.EXTINCTION_OPEN_EDITION_BY_WHISBE) {
_handleMintForExtinctionOpenEditionByWhisbe(_to);
} else if (_collection == Constants.THE_HORNED_KARMA_CHAMELEON_BURN_REDEMPTION_BY_WHISBE) {
_handleMintForTheHornedKarmaChamaleonBurnRedemptionByWhisbe(_to);
} else if (_collection == Constants.KARMA_KEY_BLACK_BY_WHISBE) {
_handleMintForKarmaKeyBlackByWhisbe(_to);
} else if (_collection == Constants.KARMA_KEYS_BY_WHISBE) {
_handleMintForKarmaKeysByWhisbe(_to);
} else if (_collection == Constants.GOOD_KARMA_TOKEN) {
_handleMintForGoodKarmaToken(_to);
} else {
revert Errors.WhisbeVandalz__MintNotAvailable();
}
}
//===Internal view functions===//
/**
* @notice function to check via merkle proof whether an address is whitelisted
* @param _proof the nodes required for the merkle proof
*/
function _isWhitelistedAddress(bytes32[] memory _proof) internal view {
bytes32 addressHash = keccak256(abi.encodePacked(msg.sender));
require(MerkleProof.verify(_proof, merkleRoot, addressHash), "Whitelist: caller is not whitelisted");
}
/**
* @inheritdoc ERC721
*/
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
//===Private functions===//
/**
* @notice
* @dev
*/
function _handleMintForExtinctionOpenEditionByWhisbe(address _to) private {
// 1 from tier 4
_safeMint(_to, _nextTokenFromTier(3));
// 1 from tier 1,5,6,7,8
if (includeTier1) {
_handleMintRandomlyFromTierGroup15678(_to, 1);
} else {
_handleMintRandomlyFromTierGroup5678(_to, 1);
}
}
/**
* @notice
* @dev
*/
function _handleMintForTheHornedKarmaChamaleonBurnRedemptionByWhisbe(address _to) private {
// 1 from tier 2
_safeMint(_to, _nextTokenFromTier(1));
// 1 from tier 4
_safeMint(_to, _nextTokenFromTier(3));
// 8 from tier 1,5,6,7,8
if (includeTier1) {
_handleMintRandomlyFromTierGroup15678(_to, uint256(8));
} else {
_handleMintRandomlyFromTierGroup5678(_to, uint256(8));
}
}
/**
* @notice
* @dev
*/
function _handleMintForKarmaKeyBlackByWhisbe(address _to) private {
// 1 from tier 4
_safeMint(_to, _nextTokenFromTier(3));
// 1 from tier 1,5,6,7,8
if (includeTier1) {
_handleMintRandomlyFromTierGroup15678(_to, uint256(1));
} else {
_handleMintRandomlyFromTierGroup5678(_to, uint256(1));
}
}
/**
* @notice
* @dev
*/
function _handleMintForKarmaKeysByWhisbe(address _to) private {
// 1 from tier 1,5,6,7,8
if (includeTier1) {
_handleMintRandomlyFromTierGroup15678(_to, uint256(1));
} else {
_handleMintRandomlyFromTierGroup5678(_to, uint256(1));
}
}
/**
* @notice
* @dev
*/
function _handleMintForGoodKarmaToken(address _to) private {
// 1 from tier 1,5,6,7,8
if (includeTier1) {
_handleMintRandomlyFromTierGroup15678(_to, uint256(1));
} else {
_handleMintRandomlyFromTierGroup5678(_to, uint256(1));
}
}
/**
* @notice
* @dev
*/
function _handleMintRandomlyFromTierGroup15678(address _to, uint256 _count) private {
uint256 _groupTier15678IndexesLen = groupTier15678Indexes.length;
if (_groupTier15678IndexesLen == 0) {
revert Errors.WhisbeVandalz__NoGroupTier15678Group();
}
uint256 _randomTier15678GroupIndex;
for (uint256 _i; _i < _count; _i++) {
// get random tier index from tier group
_randomTier15678GroupIndex = _getRandomNumber() % _groupTier15678IndexesLen;
// mint
_safeMint(_to, _nextTokenFromTier(groupTier15678Indexes[_randomTier15678GroupIndex]));
// check and update tier group based on each tier's token availability
_checkAndUpdateGroupTier15678TokenAvailability(_randomTier15678GroupIndex);
if (_randomTier15678GroupIndex != 0) {
_checkAndUpdateGroupTier5678TokenAvailability(_randomTier15678GroupIndex - 1);
}
}
}
/**
* @notice
* @dev
*/
function _handleMintRandomlyFromTierGroup5678(address _to, uint256 _count) private {
uint256 _groupTier5678IndexesLen = groupTier5678Indexes.length;
if (_groupTier5678IndexesLen == 0) {
revert Errors.WhisbeVandalz__NoGroupTier5678Group();
}
uint256 _randomTier5678GroupIndex;
for (uint256 _i; _i < _count; _i++) {
// get random tier index from tier group
_randomTier5678GroupIndex = _getRandomNumber() % _groupTier5678IndexesLen;
// mint
_safeMint(_to, _nextTokenFromTier(groupTier5678Indexes[_randomTier5678GroupIndex]));
// check and update tier group based on each tier's token availability
_checkAndUpdateGroupTier5678TokenAvailability(_randomTier5678GroupIndex);
_checkAndUpdateGroupTier15678TokenAvailability(_randomTier5678GroupIndex + 1);
}
}
/**
* @dev
* @param _index
*/
function _checkAndUpdateGroupTier15678TokenAvailability(uint256 _index) private {
if (availableTierTokenCount(groupTier15678Indexes[_index]) == 0) {
groupTier15678Indexes[_index] = groupTier15678Indexes[groupTier15678Indexes.length - 1];
groupTier15678Indexes.pop();
}
}
/**
* @dev
* @param _index
*/
function _checkAndUpdateGroupTier5678TokenAvailability(uint256 _index) private {
if (availableTierTokenCount(groupTier5678Indexes[_index]) == 0) {
groupTier5678Indexes[_index] = groupTier5678Indexes[groupTier5678Indexes.length - 1];
groupTier5678Indexes.pop();
}
}
}
// 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 v4.4.1 (token/ERC1155/IERC1155.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC1155 compliant contract, as defined in the
* https://eips.ethereum.org/EIPS/eip-1155[EIP].
*
* _Available since v3.1._
*/
interface IERC1155 is IERC165 {
/**
* @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
*/
event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] values
);
/**
* @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
* `approved`.
*/
event ApprovalForAll(address indexed account, address indexed operator, bool approved);
/**
* @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
*
* If an {URI} event was emitted for `id`, the standard
* https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
* returned by {IERC1155MetadataURI-uri}.
*/
event URI(string value, uint256 indexed id);
/**
* @dev Returns the amount of tokens of token type `id` owned by `account`.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function balanceOf(address account, uint256 id) external view returns (uint256);
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
*
* Requirements:
*
* - `accounts` and `ids` must have the same length.
*/
function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
external
view
returns (uint256[] memory);
/**
* @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
*
* Emits an {ApprovalForAll} event.
*
* Requirements:
*
* - `operator` cannot be the caller.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address account, address operator) external view returns (bool);
/**
* @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
*
* Emits a {TransferSingle} event.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
* - `from` must have a balance of tokens of type `id` of at least `amount`.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
* acceptance magic value.
*/
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) external;
/**
* @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
*
* Emits a {TransferBatch} event.
*
* Requirements:
*
* - `ids` and `amounts` must have the same length.
* - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
* acceptance magic value.
*/
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165Storage.sol)
pragma solidity ^0.8.0;
import "./ERC165.sol";
/**
* @dev Storage based implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165Storage is ERC165 {
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return super.supportsInterface(interfaceId) || _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;
}
}
// 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 v4.6.0) (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*
* WARNING: You should avoid using leaf values that are 64 bytes long prior to
* hashing, or use a hash function other than keccak256 for hashing leaves.
* This is because the concatenation of a sorted pair of internal nodes in
* the merkle tree could be reinterpreted as a leaf value.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = _efficientHash(computedHash, proofElement);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = _efficientHash(proofElement, computedHash);
}
}
return computedHash;
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
library Errors {
error WhisbeVandalz__InvalidCollection(address);
error WhisbeVandalz__EightTiersRequired(uint256);
error ERC721RandomlyAssignVandalzTier__UnavailableTierTokens(uint256);
error WhisbeVandalz__MintNotAvailable();
error WhisbeVandalz__PublicMintUpToTwoPerWallet();
error WhisbeVandalz__NoGroupTier15678Group();
error WhisbeVandalz__NoGroupTier5678Group();
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
/**
* @title
* @author
*/
library Constants {
address public constant EXTINCTION_OPEN_EDITION_BY_WHISBE = 0xcD136E30b316837C190241e838639c619516Fdf9;
address public constant THE_HORNED_KARMA_CHAMELEON_BURN_REDEMPTION_BY_WHISBE =
0x41C884CC6847a95CfFf4EaC251173ea72C3c5eFB;
address public constant KARMA_KEY_BLACK_BY_WHISBE = 0xe2C2613E647Ebd03fdC71a1Cf1fD1F938321356c;
address public constant KARMA_KEYS_BY_WHISBE = 0xA53e7Fd6abC0fe9769690Af55f19c2b4A13F2Bc3;
address public constant GOOD_KARMA_TOKEN = 0xC5dd321472f80A3EC9779F55cc1Af854712fAE70;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// 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;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.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 virtual 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 {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual 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 virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `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);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(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 = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(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(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @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()) {
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("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @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` and `to` are never both zero.
*
* 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 {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/utils/ERC721Holder.sol)
pragma solidity ^0.8.0;
import "../IERC721Receiver.sol";
/**
* @dev Implementation of the {IERC721Receiver} interface.
*
* Accepts all token transfers.
* Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
*/
contract ERC721Holder is IERC721Receiver {
/**
* @dev See {IERC721Receiver-onERC721Received}.
*
* Always returns `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address,
address,
uint256,
bytes memory
) public virtual override returns (bytes4) {
return this.onERC721Received.selector;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/ERC721Burnable.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "../../../utils/Context.sol";
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721Burnable is Context, ERC721 {
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
_burn(tokenId);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 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 {
_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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ERC721Extensions/ERC721LimitedSupply.sol";
import { DataTypes } from "./types/DataTypes.sol";
import { Errors } from "./types/Errors.sol";
/**
* @title Randomly assign tokenIDs from a given set of tokens.
*/
abstract contract ERC721RandomlyAssignVandalzTier is ERC721LimitedSupply {
using Counters for Counters.Counter;
/**
* @dev token id of first token
*/
uint256 public startFrom;
/**
* @dev Used for random index assignment
*/
mapping(uint256 => uint256) private tokenMatrix;
/**
* @notice
* @dev
*/
DataTypes.Tier[] public tiers;
/**
* @notice Instanciate the contract
* @param _totalSupply how many tokens this collection should hold
*/
constructor(uint256 _totalSupply, uint256 _startFrom) ERC721LimitedSupply(_totalSupply) {
startFrom = _startFrom;
}
/**
* @notice Get the current token count of give tier
* @param _tierIndex the tier index
* @return the created token count of given tier
*/
function tierWiseTokenCount(uint256 _tierIndex) public view returns (uint256) {
return tiers[_tierIndex].tokenCount.current();
}
/**
* @notice Check whether tokens are still available for a given tier
* @param _tierIndex the tier index
* @return the available token count for given tier
*/
function availableTierTokenCount(uint256 _tierIndex) public view returns (uint256) {
return tiers[_tierIndex].pieces - tiers[_tierIndex].tokenCount.current();
}
/**
* @notice Get the next token ID
* @dev Randomly gets a new token ID and keeps track of the ones that are still available.
* @return the next token ID
*/
function _nextToken() internal override ensureAvailability returns (uint256) {
uint256 _nextTokenId = _internalNextToken(totalSupply() - tokenCount()) + startFrom;
_updateTierTokenCount(_nextTokenId);
return _nextTokenId;
}
function _updateTierTokenCount(uint256 _nextTokenId) internal {
for (uint256 _i; _i < tiers.length; _i++) {
if (_nextTokenId >= tiers[_i].from && _nextTokenId <= tiers[_i].to) {
// Increment tier token count
tiers[_i].tokenCount.increment();
break;
}
}
}
/**
* @notice Get the next token ID from given tier
* @dev Randomly gets a new token ID from given tier and keeps track of the ones that are still available.
* @return the next token ID from given tier
*/
function _nextTokenFromTier(uint256 _tierIndex) internal ensureAvailability returns (uint256) {
if (availableTierTokenCount(_tierIndex) == 0) {
revert Errors.ERC721RandomlyAssignVandalzTier__UnavailableTierTokens(_tierIndex);
}
uint256 _nextTokenId =
_internalNextToken(tiers[_tierIndex].pieces - tiers[_tierIndex].tokenCount.current()) +
tiers[_tierIndex].from;
// Increment tier token count
tiers[_tierIndex].tokenCount.increment();
return _nextTokenId;
}
function _internalNextToken(uint256 _maxIndex) internal returns (uint256) {
uint256 _randomNumber = _getRandomNumber() % _maxIndex;
uint256 value;
if (tokenMatrix[_randomNumber] == 0) {
// If this matrix position is empty, set the value to the generated random number.
value = _randomNumber;
} else {
// Otherwise, use the previously stored number from the matrix.
value = tokenMatrix[_randomNumber];
}
// If the last available tokenID is still unused...
if (tokenMatrix[_maxIndex - 1] == 0) {
// ...store that ID in the current matrix position.
tokenMatrix[_randomNumber] = _maxIndex - 1;
} else {
// ...otherwise copy over the stored number to the current matrix position.
tokenMatrix[_randomNumber] = tokenMatrix[_maxIndex - 1];
}
// Increment counts
super._nextToken();
return value;
}
function _setTier(
uint256 _tierIndex,
uint256 _from,
uint256 _to
) internal virtual {
require(_to - _from >= tiers[_tierIndex].pieces, "ERC721RandomlyAssignVandalzTier : misaligned pieces");
tiers[_tierIndex].from = _from;
tiers[_tierIndex].to = _to;
tiers[_tierIndex].pieces = _to - _from + 1;
}
/**
* @notice Get the next token ID
* @dev Randomly gets a new token ID and keeps track of the ones that are still available.
* @return the next token ID
*/
function _getRandomNumber() internal view virtual returns (uint256) {
return
uint256(
keccak256(
abi.encodePacked(
msg.sender,
block.coinbase,
blockhash(block.number),
block.gaslimit,
block.timestamp,
tokenCount(),
availableTokenCount(),
totalSupply()
)
)
);
}
}
// 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 v4.5.0) (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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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 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 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 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 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
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Counters.sol";
/**
* @title A token tracker that limits the token supply and increments token IDs on each new mint.
* @author
*/
abstract contract ERC721LimitedSupply {
using Counters for Counters.Counter;
/**
* @dev Emitted when the supply of this collection changes
*/
event SupplyChanged(uint256 indexed supply);
/**
* @dev Keeps track of how many we have minted
*/
Counters.Counter private _tokenCount;
/**
* @dev The maximum count of tokens this token tracker will hold.
*/
uint256 private _totalSupply;
/**
* @dev Instanciate the contract
* @param totalSupply_ how many tokens this collection should hold
*/
constructor(uint256 totalSupply_) {
_totalSupply = totalSupply_;
}
/**
* @notice Get the max Supply
* @return the maximum token count
*/
function totalSupply() public view virtual returns (uint256) {
return _totalSupply;
}
/**
* @notice Get the current token count
* @return the created token count
*/
function tokenCount() public view returns (uint256) {
return _tokenCount.current();
}
/**
* @notice Check whether tokens are still available
* @return the available token count
*/
function availableTokenCount() public view returns (uint256) {
return totalSupply() - tokenCount();
}
/**
* @dev Increment the token count and fetch the latest count
* @return the next token id
*/
function _nextToken() internal virtual returns (uint256) {
uint256 token = _tokenCount.current();
_tokenCount.increment();
return token;
}
/**
* @dev Check whether another token is still available
*/
modifier ensureAvailability() {
require(availableTokenCount() > 0, "No more tokens available");
_;
}
/**
* @dev Check whether tokens are still available
* @param amount Check whether number of tokens are still available
*/
modifier ensureAvailabilityFor(uint256 amount) {
require(availableTokenCount() >= amount, "Requested number of tokens not available");
_;
}
/**
* @notice Update the supply for the collection
* @dev create additional token supply for this collection.
* @param _supply the new token supply.
*/
function _setSupply(uint256 _supply) internal virtual {
require(_supply > tokenCount(), "Can't set the supply to less than the current token count");
_totalSupply = _supply;
emit SupplyChanged(totalSupply());
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
import "@openzeppelin/contracts/utils/Counters.sol";
/**
* @title container of the data types
* @author
*/
library DataTypes {
/**
* @notice
* @dev
* @param
* @param
*/
struct Tier {
uint256 from;
uint256 to;
uint256 pieces;
Counters.Counter tokenCount;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. 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;`
*/
library Counters {
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 {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}