Feature Tip: Add private address tag to any address under My Name Tag !
ERC-721
Overview
Max Total Supply
4,246 DUCK
Holders
1,230
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
1 DUCKLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
DuckFrensV2
Compiler Version
v0.8.13+commit.abaa5c0e
Optimization Enabled:
Yes with 800 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: CC-BY-NC-4.0 pragma solidity ^0.8.13; import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; import {MerkleProof} from "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol"; import {ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import {IERC721} from "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import {IStakeDucks} from "./interfaces/IStakeDucks.sol"; /** * MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWWWWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0O0KXNWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMMMMMMMMMMNK0OxxOOOO00KKNWMMMMMMMMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMMMMMMMMNKOO0KXXXXXXXK000K0KNMMMMMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMMMMMMNKOOKXXXXXXXXXXXXXXNXK0KNMMMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMMMMN0OOKXXXXXXXXXXXXXXXXXNNN0OXWMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMMMXkdOXXXXXXXXXXXXXXXXXXXXXNN0OXWMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMMXkdOKXXXXXXXNNNNXXXXXXXXXXXXXkkNMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMWOdOKXXXXXKkddkOKNNXXXXXXXXX0dodkXMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMKxkKXXXXX0d;;oxld0XXXXXXXXXXkclxd0MMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMXxdkKXXXXXk:,;ooc:dKXXXXXXXXXOc;;cOWMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMXddOKXXXXXk:,,,,,;dKXX0OOkxxxdl:cdO0XWMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMXdoOKXXXXX0xlcccldOKkdoolllooooooodokNMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMNkdk0KXXXXXK0OO0KKOdooddoooodddddxxlxNMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMN0kkOKXXXXXXXXXXXxlllooddddddxkkkkkKWMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMMWKxoxOKXXXXXXXXXKOxdllllllllloxkKWMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMN0OkxxdxxxkkO0KXKKKK0OkxdollloOXWMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMN0OOKK0OOkkxdddxxxddddddddddxkkkkKNMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMWKkk0KKXXKK00OOOOkkkkkkkkkkkOOOOOOOO0KWMMMMMMMMMMMMMMM * MMMMMMMMMMN00K000xxOO0KXXXXXXKKK00000000000000000KKNXO0WMMMMMMMMMMMMMM * MMMMMMMMMMKdoolcldkOKKKKKKXXXXXXKKKKXXXXXXXXXXXXXXKKXXO0WMMMMMMMMMMMMM * MMMMMMMMMMXxxkoccdkO0KK00KXKKKKOk0KXXXXXXXXXXXXXXXXKO0kONMMMMMMMMMMMMM * MMMMMMMMMMWOdkkolodxkOOO0Oxkkkxk0XXXXXXXXXXXXXXXXXXX0ddONMMMMMMMMMMMMM * MMMMMMMMMMMNOxxxxdoooodxxxdxkO0KKKXXXXXXXXXXXXXXXXXKOkKNMMMMMMMMMMMMMM * MMMMMMMMMMMMWXOxxkOxdxO0KKKXXXXOx0XXXXXXXXXXXXXXXXKO0NMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMWXOkxold0XXXXXXX0ddk0KKXXXXXXXXXXXK00KWMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMWX0xlxOKXXXX0dlooxxkOO0O000OOkO0XWMMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMMWKkdxOO0OO0K0OOOOOxlllllllxNMMMMMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMMWWN0oclookXMMMMMMMMNOlclllo0NNNNWMMMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMMNOxolooloxOOXWMMMMMN0dlcclclxkddkOKWMMMMMMMMMMMMMMMM * MMMMMMMMMMMMMMMMMWkccccloc:odlxNMMMMWOlcccc;;cddlcoodKMMMMMMMMMMMMMMMM * * @title DuckFrens Contract (V2) * @custom:website www.duckfrens.com * @author @lozzereth (www.allthingsweb3.com) * @notice A non-sequential mint of 5000 ducks, 1000 of which are migrated * from the old Duck contract and the remaining 4000 as a free mint. */ contract DuckFrensV2 is ERC721, Ownable { /// @dev Number of mint types uint256 public constant MAX_MINT_TYPES = 2; /// @dev A mint type is either a migration or a new mint enum MintType { Migration, New } /// @dev Attributes for each of the mint types struct MintAttributes { uint256 supply; uint256 startingId; uint256 minted; uint256 burnt; } /// @dev Mapping for mint types and its attributes mapping(MintType => MintAttributes) public mint; /// @dev The DuckFrens contract to migrate IERC721 public immutable legacy721Contract; /// @dev The DuckFrens legacy contract IStakeDucks public immutable legacyStakingContract; /// @dev The public sale will be based on a per txn basis uint256 public maxMintPerTxn = 2; /// @dev Modify number of maximum mints using whitelist uint256 public maxMintPerWallet = 1; /// @dev Toggle public sale bool public publicSale = false; /// @dev Toggle whitelist sale bool public whitelistSale = false; /// @dev Toggle swapping bool public swapEnabled = false; /// @dev Whitelist sale merkle root bytes32 public whitelistSaleMerkleRoot; /// @dev Track the mint counts for whitelisted wallets mapping(address => uint256) public whitelistMintCount; constructor(IERC721 _legacy721Contract, IStakeDucks _legacyStakingContract) ERC721("Duck Frens", "DUCK") { legacy721Contract = _legacy721Contract; legacyStakingContract = _legacyStakingContract; mint[MintType.Migration] = MintAttributes(1000, 0, 0, 0); mint[MintType.New] = MintAttributes(4000, 1000, 0, 0); baseURI = "ipfs://QmSXH6kSYaigqQKqrVbhXq79NpF7xwWAjjSt79C34szgZ6/"; } /** * @notice Toggle the public sale */ function togglePublicSale() external onlyOwner { publicSale = !publicSale; } modifier publicSaleActive() { require(publicSale, "Public sale not started"); _; } /** * @notice Toggle the whitelist sale */ function toggleWhitelistSale() external onlyOwner { whitelistSale = !whitelistSale; } modifier whitelistSaleActive() { require(whitelistSale, "Whitelist sale not started"); _; } /** * @notice Toggle swapping of original NFTs */ function toggleSwapping() external onlyOwner { swapEnabled = !swapEnabled; } /** * @notice Set the maximum mints per txn as owner * @param max Maximum to set */ function setMaxMintPerTxn(uint256 max) external onlyOwner { maxMintPerTxn = max; } /** * @notice Set the maximum mints per whitelist wallet * @param max Maximum to set */ function setMaxMintPerWallet(uint256 max) external onlyOwner { maxMintPerWallet = max; } /** * @notice Public minting functionality * @param quantity Quantity */ function mintPublic(uint256 quantity) public publicSaleActive withinSupplyLimit(MintType.New, quantity) withinMaximumPerTxn(quantity) { _mintMany(MintType.New, msg.sender, quantity); } modifier withinMaximumPerTxn(uint256 quantity) { require(quantity > 0 && quantity <= maxMintPerTxn, "Over max per txn"); _; } /** * @notice Set the whitelist merkle root * @param merkleRoot Merkle root for the whitelist */ function setWhitelistSaleMerkleRoot(bytes32 merkleRoot) external onlyOwner { whitelistSaleMerkleRoot = merkleRoot; } /** * @notice Mint as a whitelisted wallet address * @param merkleProof Proof of whitelist * @param quantity Quantity */ function mintWhitelist(bytes32[] calldata merkleProof, uint256 quantity) public whitelistSaleActive hasWhitelistedAddress(merkleProof) withinSupplyLimit(MintType.New, quantity) withinMaximumPerWallet(quantity) { whitelistMintCount[msg.sender] += quantity; _mintMany(MintType.New, msg.sender, quantity); } modifier withinMaximumPerWallet(uint256 _quantity) { require( _quantity > 0 && whitelistMintCount[msg.sender] + _quantity <= maxMintPerWallet, "Over max per wallet" ); _; } modifier hasWhitelistedAddress(bytes32[] calldata merkleProof) { require( _hasWhitelistProof(msg.sender, merkleProof) || _hasLegacyDucks(msg.sender), "Address not eligible" ); _; } /** * @dev Check if the address is a part of a valid whitelist proof * @param _address Address to query * @param merkleProof Proof for verification * @return hasValidProof */ function _hasWhitelistProof( address _address, bytes32[] calldata merkleProof ) private view returns (bool) { return MerkleProof.verify( merkleProof, whitelistSaleMerkleRoot, keccak256(abi.encodePacked(_address)) ); } /** * @dev Check if the address is an owner of legacy ducks * @param _address Address to query * @return hasDucks */ function _hasLegacyDucks(address _address) private view returns (bool) { return legacy721Contract.balanceOf(_address) > 0 || legacyStakingContract.depositsOf(_address).length > 0; } /** * @notice Swap your old Ducks for new Ducks. * @dev This will send the old tokens to the standard burn address and issue * new tokens. * @param tokenIds Tokens to migrate */ function swap(uint256[] calldata tokenIds) public { require(swapEnabled, "Swapping not enabled"); uint256 numTokens = tokenIds.length; unchecked { mint[MintType.Migration].minted += numTokens; } for (uint256 i; i < numTokens; ++i) { uint256 tokenId = tokenIds[i]; IERC721(legacy721Contract).safeTransferFrom( msg.sender, 0x000000000000000000000000000000000000dEaD, tokenId, "" ); _mint(msg.sender, tokenId); } } /** * @notice Allows the contract owner to mint within limits * @param _recipient Mint to recipient * @param _quantity Quantity to mint */ function mintAdmin(address _recipient, uint256 _quantity) public onlyOwner withinSupplyLimit(MintType.New, _quantity) { _mintMany(MintType.New, _recipient, _quantity); } /** * @notice Burn a token * @param tokenId Token to burn */ function burn(uint256 tokenId) public { require( _isApprovedOrOwner(msg.sender, tokenId), "DuckFrensV2: caller is not owner nor approved" ); MintType _type = getMintType(tokenId); unchecked { mint[_type].burnt++; } _burn(tokenId); } /** * @notice Get the mint type for a token id * @param _tokenId Return the type of mint the token belongs in * @return mintType */ function getMintType(uint256 _tokenId) public view returns (MintType) { for (uint256 s; s < MAX_MINT_TYPES; s++) { MintType _type = MintType(s); uint256 start = mint[_type].startingId; if (_tokenId >= start && _tokenId <= start + mint[_type].minted) { return _type; } } revert("DuckFrensV2: mint status query for nonexistent token"); } /** * @notice Base URI for the NFT */ string private baseURI; function setBaseURI(string memory baseURI_) external onlyOwner { baseURI = baseURI_; } function _baseURI() internal view virtual override returns (string memory) { return baseURI; } /** * @dev Mints many nfts * @param _type Mint type * @param _to Destination address * @param _quantity Quantity to mint */ function _mintMany( MintType _type, address _to, uint256 _quantity ) private { uint256 startingId = mint[_type].minted + mint[_type].startingId; unchecked { mint[_type].minted += _quantity; } for (uint256 i; i < _quantity; i++) { _mint(_to, startingId + i); } } modifier withinSupplyLimit(MintType _type, uint256 _quantity) { require( mint[_type].minted + _quantity <= mint[_type].supply, "Surpasses supply" ); _; } /** * @notice Fetch total supply * @return totalSupply */ function totalSupply() public view returns (uint256) { uint256 total; for (uint256 s; s < MAX_MINT_TYPES; s++) { total += mint[MintType(s)].minted; } return total; } /** * @notice Track tokens of an account * @dev Intended for off-chain computation having O(totalSupply) complexity * @param account - Account to query * @return tokenIds */ function tokensOfOwner(address account) external view returns (uint256[] memory) { unchecked { uint256 tokenIdsIdx; uint256 tokenIdsLength = balanceOf(account); uint256[] memory tokenIds = new uint256[](tokenIdsLength); for (uint256 i; tokenIdsIdx != tokenIdsLength; ++i) { if (!_exists(i)) { continue; } if (ownerOf(i) == account) { tokenIds[tokenIdsIdx++] = i; } } return tokenIds; } } }
// 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 // 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 (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 (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 pragma solidity ^0.8.13; interface IStakeDucks { function depositsOf(address account) external view returns (uint256[] 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 // 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/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (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 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/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/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); }
{ "optimizer": { "enabled": true, "runs": 800 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelistMintCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"whitelistSale","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"whitelistSaleMerkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000001a3043d23dc70aea1d9912725e2aa056be1a471e000000000000000000000000401cee9353466b3d249701c3ebcbf26452ee61b5
-----Decoded View---------------
Arg [0] : _legacy721Contract (address): 0x1a3043d23dC70AEa1D9912725E2aA056bE1A471E
Arg [1] : _legacyStakingContract (address): 0x401cEe9353466B3d249701c3EBCBf26452EE61b5
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000001a3043d23dc70aea1d9912725e2aa056be1a471e
Arg [1] : 000000000000000000000000401cee9353466b3d249701c3ebcbf26452ee61b5
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