Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9 <0.9.0;
// 888 888 888 888 .d8888b. 888 888b d888
// 888 o 888 888 888 d88P Y88b 888 8888b d8888
// 888 d8b 888 888 888 Y88b. 888 88888b.d88888
// 888 d888b 888 8888b. 888 888 "Y888b. 888888 888Y88888P888 .d88b. 88888b.d88b. .d8888b
// 888d88888b888 "88b 888 888 "Y88b. 888 888 Y888P 888 d88""88b 888 "888 "88b 88K
// 88888P Y88888 .d888888 888 888 "888 888 888 Y8P 888 888 888 888 888 888 "Y8888b.
// 8888P Y8888 888 888 888 888 Y88b d88P Y88b. 888 " 888 Y88..88P 888 888 888 X88
// 888P Y888 "Y888888 888 888 "Y8888P" "Y888 888 888 "Y88P" 888 888 888 88888P'
import "erc721a/contracts/ERC721A.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
contract WallStMoms is ERC721A, Ownable {
using Strings for uint256;
enum SaleType {
WHITELIST_SUPER_FRENS,
WHITELIST,
WHITELIST_FREE_MINT,
PUBLIC_SALE
}
event WhiteYeti(address indexed whiteYeti, bool value);
address public LegenDaddy_ADDRESS = 0x93ed994082734BbEc169e19386f6DC28200A17A3;
string public baseURI_1;
string public baseURI_2;
string public baseURI_3;
string public notRevealedURI;
string public PROVENANCE_1;
string public PROVENANCE_2;
string public PROVENANCE_3;
string public baseExtension = ".json";
bytes32 public merkleRootSF;
bytes32 public merkleRoot;
bytes32 public merkleRootFreeMint;
mapping(address => bool) whiteYetiAddresses;
mapping(address => bool) mintedSF;
mapping(address => bool) mintedWhiteYeti;
mapping(address => uint8) amountMintedWhitelistPhase1;
mapping(address => uint8) amountMintedWhitelistPhase2;
mapping(address => uint8) amountMintedWhitelistPhase3;
mapping(address => bool) freeMintedWithDads;
uint256 public costWhitelistedSF = 0.00 ether;
uint256 public costWhitelisted = 0.09 ether;
uint256 public costPublicSale = 0.12 ether;
uint256 public costWhiteYeti = 0.09 ether;
uint16 public phaseMaxSupply1;
uint16 public phaseMaxSupply2;
uint16 public phaseMaxSupply3;
uint16 public currPhaseMaxSupply;
uint16 public maxMintAmountWhitelistSF = 1;
uint16 public maxMintAmountWhitelist = 2;
uint16 public maxMintAmountPublicSale = 2;
uint16 public maxMintAmountWhiteYeti = 100;
uint8 public lastRevealedPhase = 0; // possible values: 0, 1, 2, 3. 0 means no phase has been revealed yet.
uint8 public phase = 1;
bool public paused = false;
bool public frozenMetadata = false;
bool public frozenMaxSupply = false;
SaleType public currSaleType = SaleType.WHITELIST_SUPER_FRENS;
constructor(
string memory _name,
string memory _symbol,
string memory _initNotRevealedURI,
uint16 _phaseMaxSupply1,
uint16 _phaseMaxSupply2,
uint16 _phaseMaxSupply3
) ERC721A(_name, _symbol) {
setNotRevealedURI(_initNotRevealedURI);
phaseMaxSupply1 = _phaseMaxSupply1;
phaseMaxSupply2 = _phaseMaxSupply2;
phaseMaxSupply3 = _phaseMaxSupply3;
currPhaseMaxSupply = phaseMaxSupply1;
}
//-------MINTING FUNCTIONS-------//
function mintWhitelistedSF(uint16 _mintAmount, bytes32[] calldata _merkleProof) external payable {
require(currSaleType == SaleType.WHITELIST_SUPER_FRENS, "Super Frens sale is not active");
require(isWhitelistedSF(msg.sender, _merkleProof), "You are not whitelisted");
require(mintedSF[msg.sender] == false, "You already minted");
require(_mintAmount <= maxMintAmountWhitelistSF, "Max mint amount exceeded");
require(msg.value >= costWhitelistedSF * _mintAmount, "Insufficient ETH amount");
mintedSF[msg.sender] = true;
_mint(_mintAmount);
}
function mintWhitelisted_phase1(uint16 _mintAmount, bytes32[] calldata _merkleProof)
external
payable
canWhitelistMint(_mintAmount, _merkleProof)
{
require(phase == 1, "Phase 1 is not active");
require(amountMintedWhitelistPhase1[msg.sender] + _mintAmount <= maxMintAmountWhitelist, "Max mint amount exceeded");
amountMintedWhitelistPhase1[msg.sender] += uint8(_mintAmount);
_mint(_mintAmount);
}
function mintWhitelisted_phase2(uint16 _mintAmount, bytes32[] calldata _merkleProof)
external
payable
canWhitelistMint(_mintAmount, _merkleProof)
{
require(phase == 2, "Phase 2 is not active");
require(amountMintedWhitelistPhase2[msg.sender] + _mintAmount <= maxMintAmountWhitelist, "Max mint amount exceeded");
amountMintedWhitelistPhase2[msg.sender] += uint8(_mintAmount);
_mint(_mintAmount);
}
function mintWhitelisted_phase3(uint16 _mintAmount, bytes32[] calldata _merkleProof)
external
payable
canWhitelistMint(_mintAmount, _merkleProof)
{
require(phase == 3, "Phase 3 is not active");
require(amountMintedWhitelistPhase3[msg.sender] + _mintAmount <= maxMintAmountWhitelist, "Max mint amount exceeded");
amountMintedWhitelistPhase3[msg.sender] += uint8(_mintAmount);
_mint(_mintAmount);
}
modifier canWhitelistMint(uint16 _mintAmount, bytes32[] calldata _merkleProof) {
require(currSaleType == SaleType.WHITELIST, "Whitelist sale is not active");
require(isWhitelisted(msg.sender, _merkleProof), "You are not whitelisted");
require(msg.value >= costWhitelisted * _mintAmount, "Insufficient ETH amount");
_;
}
function mintFreeWithDads(uint16 _mintAmount, bytes32[] calldata _merkleProof) external {
require(currSaleType == SaleType.WHITELIST_FREE_MINT, "Whitelist Free Mint sale is not active");
require(isWhitelistedForFreeMint(msg.sender, _mintAmount, _merkleProof), "You are not whitelisted or the amount doesn't match");
require(freeMintedWithDads[msg.sender] == false, "You already minted your free moms");
freeMintedWithDads[msg.sender] = true;
_mint(_mintAmount);
}
function mintWithWhiteYeti(uint16 _mintAmount) external payable {
require(_mintAmount <= maxMintAmountWhiteYeti, "Max mint amount exceeded");
require(msg.value >= costWhiteYeti * _mintAmount, "Insufficient ETH amount");
require(whiteYetiAddresses[msg.sender], "You don't have white yeti badge");
require(mintedWhiteYeti[msg.sender] == false, "You already minted");
mintedWhiteYeti[msg.sender] = true;
_mint(_mintAmount);
}
function mintPublicSale(uint16 _mintAmount) external payable {
require(currSaleType == SaleType.PUBLIC_SALE, "Public sale is not active");
require(_mintAmount <= maxMintAmountPublicSale, "Max mint amount exceeded");
require(msg.value >= costPublicSale * _mintAmount, "Insufficient ETH amount");
_mint(_mintAmount);
}
function mintOnlyOwner(uint16 _mintAmount) external onlyOwner {
_mint(_mintAmount);
}
//-------VIEW ONLY FUNCTIONS-------//
function isWhitelistedSF(address _user, bytes32[] calldata _merkleProof) public view returns (bool) {
bytes32 leaf = keccak256(abi.encodePacked(_user));
return MerkleProof.verify(_merkleProof, merkleRootSF, leaf);
}
function isWhitelisted(address _user, bytes32[] calldata _merkleProof) public view returns (bool) {
bytes32 leaf = keccak256(abi.encodePacked(_user));
return MerkleProof.verify(_merkleProof, merkleRoot, leaf);
}
function isWhitelistedForFreeMint(
address _user,
uint16 _mintAmount,
bytes32[] calldata _merkleProof
) public view returns (bool) {
bytes32 leaf = keccak256(abi.encodePacked(_user, _mintAmount));
return MerkleProof.verify(_merkleProof, merkleRootFreeMint, leaf);
}
function isWhiteYeti(address _user) public view returns (bool) {
return whiteYetiAddresses[_user];
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "tokenId does not exist");
if (!isPhaseRevealed(getPhaseForTokenId(tokenId))) {
return notRevealedURI;
}
string memory baseURI = _baseURI(getPhaseForTokenId(tokenId));
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString(), baseExtension)) : "";
}
function getPhaseForTokenId(uint256 tokenId) public view returns (uint8) {
if (tokenId <= phaseMaxSupply1) return 1;
if (tokenId <= phaseMaxSupply1 + phaseMaxSupply2) return 2;
return 3;
}
function maxSupply() public view returns (uint16) {
return phaseMaxSupply1 + phaseMaxSupply2 + phaseMaxSupply3;
}
//-------VIEWERS FOR SALE PHASE-------//
function isWhitelistSFSale() public view returns (bool) {
return currSaleType == SaleType.WHITELIST_SUPER_FRENS;
}
function isWhitelistSale() public view returns (bool) {
return currSaleType == SaleType.WHITELIST;
}
function isWhitelistFreeMint() public view returns (bool) {
return currSaleType == SaleType.WHITELIST_FREE_MINT;
}
function isPublicSale() public view returns (bool) {
return currSaleType == SaleType.PUBLIC_SALE;
}
//-------INTERNAL-------//
function _mint(uint16 _mintAmount) internal {
require(!paused, "Please wait until unpaused");
require(_mintAmount > 0, "Need to mint more than 0");
require(_totalMinted() + _mintAmount <= currPhaseMaxSupply, "Max supply exceeded");
super._mint(msg.sender, _mintAmount, "", true);
}
function isPhaseRevealed(uint8 _phase) internal view returns (bool) {
return _phase <= lastRevealedPhase;
}
function _baseURI(uint8 _phase) internal view returns (string memory) {
if (_phase == 1) {
return baseURI_1;
}
if (_phase == 2) {
return baseURI_2;
}
return baseURI_3;
}
function _startTokenId() internal pure override returns (uint256) {
return 1;
}
//-------ONLY OWNER-------//
//SETTERS FOR STRINGS
function setBaseURI(string memory _newBaseURI, uint8 _phase) public onlyOwner validPhase(_phase) {
require(!frozenMetadata, "Metadata is frozen");
if (_phase == 1) {
baseURI_1 = _newBaseURI;
} else if (_phase == 2) {
baseURI_2 = _newBaseURI;
} else if (_phase == 3) {
baseURI_3 = _newBaseURI;
}
}
function setNotRevealedURI(string memory _notRevealedURI) public onlyOwner {
notRevealedURI = _notRevealedURI;
}
function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
baseExtension = _newBaseExtension;
}
//SETTERS FOR PROVENANCE
function setProvenanceHash_1(string memory _provenanceHash) public onlyOwner {
PROVENANCE_1 = _provenanceHash;
}
function setProvenanceHash_2(string memory _provenanceHash) public onlyOwner {
PROVENANCE_2 = _provenanceHash;
}
function setProvenanceHash_3(string memory _provenanceHash) public onlyOwner {
PROVENANCE_3 = _provenanceHash;
}
//SETTERS FOR PAUSED, REVEALED, FREEZE METADATA AND PHASE
function setPaused(bool _state) public onlyOwner {
paused = _state;
}
function unreveal() public onlyOwner {
lastRevealedPhase = 0;
}
function revealPhase1(string memory _baseURI_1) public onlyOwner {
require(lastRevealedPhase == 0, "Cannot reveal this phase");
lastRevealedPhase = 1;
if (!frozenMetadata) {
baseURI_1 = _baseURI_1;
}
}
function revealPhase2(string memory _baseURI_2) public onlyOwner {
require(lastRevealedPhase == 1, "Cannot reveal this phase");
lastRevealedPhase = 2;
if (!frozenMetadata) {
baseURI_2 = _baseURI_2;
}
}
function revealPhase3(string memory _baseURI_3) public onlyOwner {
require(lastRevealedPhase == 2, "Cannot reveal this phase");
lastRevealedPhase = 3;
if (!frozenMetadata) {
baseURI_3 = _baseURI_3;
}
}
function freezeMetadata() public onlyOwner {
require(bytes(baseURI_1).length > 0, "BaseURI 1 is not set");
require(bytes(baseURI_2).length > 0, "BaseURI 2 is not set");
require(bytes(baseURI_3).length > 0, "BaseURI 3 is not set");
require(phase == 3, "Phase is not 3");
frozenMetadata = true;
}
function freezeMaxSupply() public onlyOwner {
require(phase == 3, "Phase is not 3");
frozenMaxSupply = true;
}
function setPhase(uint8 _phase) public onlyOwner validPhase(_phase) {
require(_phase >= 1 && _phase <= 3, "Phase must be between 1 and 3");
phase = _phase;
currPhaseMaxSupply = calculatePhaseMaxSupply(phase);
}
function calculatePhaseMaxSupply(uint8 _phase) public view onlyOwner returns (uint16) {
if (_phase == 1) {
return phaseMaxSupply1;
}
if (_phase == 2) {
return phaseMaxSupply1 + phaseMaxSupply2;
}
if (_phase == 3) {
return phaseMaxSupply1 + phaseMaxSupply2 + phaseMaxSupply3;
}
return 0;
}
modifier validPhase(uint8 _phase) {
require(_phase <= 3, "Phase must be 1, 2 or 3");
_;
}
//SETTERS FOR SALE PHASE
function setWhitelistSFSale() public onlyOwner {
currSaleType = SaleType.WHITELIST_SUPER_FRENS;
}
function setWhitelistSale() public onlyOwner {
currSaleType = SaleType.WHITELIST;
}
function setWhitelistFreeMintSale() public onlyOwner {
currSaleType = SaleType.WHITELIST_FREE_MINT;
}
function setPublicSale() public onlyOwner {
currSaleType = SaleType.PUBLIC_SALE;
}
//SETTERS FOR COSTS
function setCostWhitelistedSF(uint256 _newCostWhitelisted) public onlyOwner {
costWhitelistedSF = _newCostWhitelisted;
}
function setCostWhitelisted(uint256 _newCostWhitelisted) public onlyOwner {
costWhitelisted = _newCostWhitelisted;
}
function setCostPublicSale(uint256 _newCostPublicSale) public onlyOwner {
costPublicSale = _newCostPublicSale;
}
function setCostWhiteYeti(uint256 _newCostWhiteYeti) public onlyOwner {
costWhiteYeti = _newCostWhiteYeti;
}
//SETTERS FOR MAXMINTAMOUNT
function setMaxMintAmountWhitelistSF(uint16 _maxMintAmount) public onlyOwner {
maxMintAmountWhitelistSF = _maxMintAmount;
}
function setMaxMintAmountWhitelist(uint16 _maxMintAmount) public onlyOwner {
maxMintAmountWhitelist = _maxMintAmount;
}
function setMaxMintAmountPublicSale(uint16 _maxMintAmount) public onlyOwner {
maxMintAmountPublicSale = _maxMintAmount;
}
function setMaxMintAmountWhiteYeti(uint16 _maxMintAmount) public onlyOwner {
maxMintAmountWhiteYeti = _maxMintAmount;
}
//SETTER FOR PHASE MAXSUPPLY
function setPhaseMaxSupply(uint8 _phase, uint16 _newPhaseMaxSupply) public onlyOwner {
require(!frozenMaxSupply, "Max supply is frozen");
require(_phase == 1 || _phase == 2 || phase == 3, "Phase must be 1, 2 or 3");
if (_phase == 1) {
phaseMaxSupply1 = _newPhaseMaxSupply;
} else if (_phase == 2) {
phaseMaxSupply2 = _newPhaseMaxSupply;
} else if (_phase == 3) {
phaseMaxSupply3 = _newPhaseMaxSupply;
}
if (phase == _phase) {
currPhaseMaxSupply = calculatePhaseMaxSupply(phase);
}
}
//SETTERS FOR WHITELISTS
function setWhitelist(bytes32 _merkleRoot) external onlyOwner {
merkleRoot = _merkleRoot;
}
function setWhitelistSF(bytes32 _merkleRoot) external onlyOwner {
merkleRootSF = _merkleRoot;
}
function setWhitelistForFreeMint(bytes32 _merkleRoot) external onlyOwner {
merkleRootFreeMint = _merkleRoot;
}
function setWhiteYetiAddress(address _yetiAddress, bool value) external onlyOwner {
whiteYetiAddresses[_yetiAddress] = value;
emit WhiteYeti(_yetiAddress, value);
}
//WITHDRAWALS
function withdraw() public payable onlyOwner {
// ================This will pay 2%=========================
(bool coldsuccess, ) = payable(LegenDaddy_ADDRESS).call{value: (address(this).balance * 2) / 100}("");
require(coldsuccess);
// ====================================================================
// This will payout the OWNER the remainder of the contract balance if any left.
(bool os, ) = payable(owner()).call{value: address(this).balance}("");
require(os);
// =====================================================================
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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.
*/
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 Merklee 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 = keccak256(abi.encodePacked(computedHash, proofElement));
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
}
}
return computedHash;
}
}
// 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
// Creator: Chiru Labs
pragma solidity ^0.8.4;
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/Strings.sol';
import '@openzeppelin/contracts/utils/introspection/ERC165.sol';
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintToZeroAddress();
error MintZeroQuantity();
error OwnerQueryForNonexistentToken();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error URIQueryForNonexistentToken();
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at _startTokenId() (defaults to 0, e.g. 0, 1, 2, 3..).
*
* Assumes that an owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
*
* Assumes that the maximum token id cannot exceed 2**256 - 1 (max value of uint256).
*/
contract ERC721A is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Compiler will pack this into a single 256bit word.
struct TokenOwnership {
// The address of the owner.
address addr;
// Keeps track of the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct AddressData {
// Realistically, 2**64-1 is more than enough.
uint64 balance;
// Keeps track of mint count with minimal overhead for tokenomics.
uint64 numberMinted;
// Keeps track of burn count with minimal overhead for tokenomics.
uint64 numberBurned;
// For miscellaneous variable(s) pertaining to the address
// (e.g. number of whitelist mint slots used).
// If there are multiple variables, please pack them into a uint64.
uint64 aux;
}
// The tokenId of the next token to be minted.
uint256 internal _currentIndex;
// The number of tokens burned.
uint256 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
mapping(uint256 => TokenOwnership) internal _ownerships;
// Mapping owner address to address data
mapping(address => AddressData) private _addressData;
// 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;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_currentIndex = _startTokenId();
}
/**
* To change the starting tokenId, please override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 0;
}
/**
* @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
*/
function totalSupply() public view returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than _currentIndex - _startTokenId() times
unchecked {
return _currentIndex - _burnCounter - _startTokenId();
}
}
/**
* Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view returns (uint256) {
// Counter underflow is impossible as _currentIndex does not decrement,
// and it is initialized to _startTokenId()
unchecked {
return _currentIndex - _startTokenId();
}
}
/**
* @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 override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return uint256(_addressData[owner].balance);
}
/**
* Returns the number of tokens minted by `owner`.
*/
function _numberMinted(address owner) internal view returns (uint256) {
return uint256(_addressData[owner].numberMinted);
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/
function _numberBurned(address owner) internal view returns (uint256) {
return uint256(_addressData[owner].numberBurned);
}
/**
* Returns the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
*/
function _getAux(address owner) internal view returns (uint64) {
return _addressData[owner].aux;
}
/**
* Sets the auxillary data for `owner`. (e.g. number of whitelist mint slots used).
* If there are multiple variables, please pack them into a uint64.
*/
function _setAux(address owner, uint64 aux) internal {
_addressData[owner].aux = aux;
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function _ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) {
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr && curr < _currentIndex) {
TokenOwnership memory ownership = _ownerships[curr];
if (!ownership.burned) {
if (ownership.addr != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _ownerships[curr];
if (ownership.addr != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _ownershipOf(tokenId).addr;
}
/**
* @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) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
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 overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721A.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_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 {
_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 {
_transfer(from, to, tokenId);
if (to.isContract() && !_checkContractOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @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`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return _startTokenId() <= tokenId && tokenId < _currentIndex && !_ownerships[tokenId].burned;
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, '');
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_addressData[to].balance += uint64(quantity);
_addressData[to].numberMinted += uint64(quantity);
_ownerships[startTokenId].addr = to;
_ownerships[startTokenId].startTimestamp = uint64(block.timestamp);
uint256 updatedIndex = startTokenId;
uint256 end = updatedIndex + quantity;
if (safe && to.isContract()) {
do {
emit Transfer(address(0), to, updatedIndex);
if (!_checkContractOnERC721Received(address(0), to, updatedIndex++, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
} while (updatedIndex != end);
// Reentrancy protection
if (_currentIndex != startTokenId) revert();
} else {
do {
emit Transfer(address(0), to, updatedIndex++);
} while (updatedIndex != end);
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* 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
) private {
TokenOwnership memory prevOwnership = _ownershipOf(tokenId);
if (prevOwnership.addr != from) revert TransferFromIncorrectOwner();
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_addressData[from].balance -= 1;
_addressData[to].balance += 1;
TokenOwnership storage currSlot = _ownerships[tokenId];
currSlot.addr = to;
currSlot.startTimestamp = uint64(block.timestamp);
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenOwnership storage nextSlot = _ownerships[nextTokenId];
if (nextSlot.addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.addr = from;
nextSlot.startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev This is equivalent to _burn(tokenId, false)
*/
function _burn(uint256 tokenId) internal virtual {
_burn(tokenId, false);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
TokenOwnership memory prevOwnership = _ownershipOf(tokenId);
address from = prevOwnership.addr;
if (approvalCheck) {
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
}
_beforeTokenTransfers(from, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
AddressData storage addressData = _addressData[from];
addressData.balance -= 1;
addressData.numberBurned += 1;
// Keep track of who burned the token, and the timestamp of burning.
TokenOwnership storage currSlot = _ownerships[tokenId];
currSlot.addr = from;
currSlot.startTimestamp = uint64(block.timestamp);
currSlot.burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenOwnership storage nextSlot = _ownerships[nextTokenId];
if (nextSlot.addr == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.addr = from;
nextSlot.startTimestamp = prevOwnership.startTimestamp;
}
}
}
emit Transfer(from, address(0), tokenId);
_afterTokenTransfers(from, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target 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 _checkContractOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* 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, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// 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 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
// 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 v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(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 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 (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 `IERC721.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/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`, 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;
}
// 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);
}