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ContractCreator
TokenTracker
Latest 25 from a total of 502 transactions
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Set Approval For... | 20325927 | 51 days ago | IN | 0 ETH | 0.00046618 | ||||
Set Approval For... | 19223732 | 206 days ago | IN | 0 ETH | 0.00078653 | ||||
Set Approval For... | 17073292 | 507 days ago | IN | 0 ETH | 0.00179118 | ||||
Set Approval For... | 16946489 | 525 days ago | IN | 0 ETH | 0.00107088 | ||||
Set Approval For... | 16639060 | 569 days ago | IN | 0 ETH | 0.00134279 | ||||
Set Approval For... | 16632282 | 570 days ago | IN | 0 ETH | 0.00123652 | ||||
Set Approval For... | 16501854 | 588 days ago | IN | 0 ETH | 0.00065977 | ||||
Set Approval For... | 16203075 | 630 days ago | IN | 0 ETH | 0.00055629 | ||||
Set Approval For... | 16164638 | 635 days ago | IN | 0 ETH | 0.00063083 | ||||
Set Approval For... | 15918449 | 669 days ago | IN | 0 ETH | 0.00108639 | ||||
Set Approval For... | 15904620 | 671 days ago | IN | 0 ETH | 0.00083936 | ||||
Set Approval For... | 15890310 | 673 days ago | IN | 0 ETH | 0.00099012 | ||||
Set Approval For... | 15887214 | 674 days ago | IN | 0 ETH | 0.00067074 | ||||
Set Approval For... | 15875446 | 675 days ago | IN | 0 ETH | 0.00056086 | ||||
Set Approval For... | 15874501 | 675 days ago | IN | 0 ETH | 0.00045754 | ||||
Set Approval For... | 15818648 | 683 days ago | IN | 0 ETH | 0.00146336 | ||||
Set Approval For... | 15811953 | 684 days ago | IN | 0 ETH | 0.00074298 | ||||
Set Approval For... | 15811912 | 684 days ago | IN | 0 ETH | 0.00076162 | ||||
Set Approval For... | 15811896 | 684 days ago | IN | 0 ETH | 0.00072047 | ||||
Set Approval For... | 15801506 | 686 days ago | IN | 0 ETH | 0.00083026 | ||||
Set Approval For... | 15788724 | 687 days ago | IN | 0 ETH | 0.00084282 | ||||
Set Approval For... | 15788712 | 687 days ago | IN | 0 ETH | 0.00091222 | ||||
Set Approval For... | 15696851 | 700 days ago | IN | 0 ETH | 0.00053032 | ||||
Set Approval For... | 15688032 | 701 days ago | IN | 0 ETH | 0.00032102 | ||||
Safe Transfer Fr... | 15688002 | 702 days ago | IN | 0 ETH | 0.00033118 |
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Contract Name:
PurPeeps
Compiler Version
v0.8.15+commit.e14f2714
Optimization Enabled:
Yes with 690 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./ERC721PsiMod.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; contract PurPeeps is ERC721PsiMod,Ownable { uint256 public constant MAX_TOKENS = 690; string private _tokenBaseURI; constructor() ERC721PsiMod ("PurPeeps NFT", "PURPEEPS"){ } function adminMint(address recipient, uint256 quantity) external onlyOwner { require(totalSupply() + quantity <= MAX_TOKENS, "Minting too many"); _safeMint(recipient, quantity); } function _startTokenId() internal override pure returns (uint256) { return 1; } function setBaseURI(string calldata URI) external onlyOwner { _tokenBaseURI = URI; } function _baseURI() internal view override returns (string memory){ return _tokenBaseURI; } }
// SPDX-License-Identifier: MIT /** Base on ERC721Psi with some modification - Optimize transfers by making approval clearing implicit instead of emitting an event. (https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3481) - Start Sequentially Minting at _startTokenId */ pragma solidity ^0.8.0; 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/token/ERC721/extensions/IERC721Enumerable.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import "@openzeppelin/contracts/utils/Address.sol"; import "@openzeppelin/contracts/utils/StorageSlot.sol"; import "solidity-bits/contracts/BitMaps.sol"; contract ERC721PsiMod is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using Address for address; using Strings for uint256; using BitMaps for BitMaps.BitMap; BitMaps.BitMap private _batchHead; string private _name; string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) internal _owners; uint256 internal _currentIndex; mapping(uint256 => address) private _tokenApprovals; 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_; _currentIndex = _startTokenId(); } /** * To change the starting tokenId, please override this function. */ function _startTokenId() internal view virtual returns (uint256) { return 0; } /** * @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 || interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint) { require(owner != address(0), "ERC721Psi: balance query for the zero address"); uint count; for( uint i = _startTokenId(); i < _currentIndex; ++i ){ if(_exists(i)){ if( owner == ownerOf(i)){ ++count; } } } return count; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { (address owner, ) = _ownerAndBatchHeadOf(tokenId); return owner; } function _ownerAndBatchHeadOf(uint256 tokenId) internal view returns (address owner, uint256 tokenIdBatchHead){ require(_exists(tokenId), "ERC721Psi: owner query for nonexistent token"); tokenIdBatchHead = _getBatchHead(tokenId); owner = _owners[tokenIdBatchHead]; } /** * @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), "ERC721Psi: 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 overriden 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 = ownerOf(tokenId); require(to != owner, "ERC721Psi: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721Psi: 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), "ERC721Psi: approved query for nonexistent token" ); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(operator != _msgSender(), "ERC721Psi: approve to caller"); _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 { //solhint-disable-next-line max-line-length require( _isApprovedOrOwner(_msgSender(), tokenId), "ERC721Psi: 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), "ERC721Psi: 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, 1,_data), "ERC721Psi: 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`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return tokenId >= _startTokenId() && tokenId < _currentIndex; } /** * @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), "ERC721Psi: operator query for nonexistent token" ); address owner = ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @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) internal virtual { _safeMint(to, quantity, ""); } function _safeMint( address to, uint256 quantity, bytes memory _data ) internal virtual { uint256 startTransferTokenId = _currentIndex; _mint(to, quantity); require( _checkOnERC721Received(address(0), to, startTransferTokenId, quantity, _data), "ERC721Psi: transfer to non ERC721Receiver implementer" ); } function _mint( address to, uint256 quantity ) internal virtual { uint256 tokenIdBatchHead = _currentIndex; require(quantity > 0, "ERC721Psi: quantity must be greater 0"); require(to != address(0), "ERC721Psi: mint to the zero address"); _beforeTokenTransfers(address(0), to, tokenIdBatchHead, quantity); _currentIndex += quantity; _owners[tokenIdBatchHead] = to; _batchHead.set(tokenIdBatchHead); _afterTokenTransfers(address(0), to, tokenIdBatchHead, quantity); // Emit events for(uint256 tokenId=tokenIdBatchHead;tokenId < tokenIdBatchHead + quantity; tokenId++){ emit Transfer(address(0), to, 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 { (address owner, uint256 tokenIdBatchHead) = _ownerAndBatchHeadOf(tokenId); require( owner == from, "ERC721Psi: transfer of token that is not own" ); require(to != address(0), "ERC721Psi: transfer to the zero address"); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner delete _tokenApprovals[tokenId]; uint256 nextTokenId = tokenId + 1; if(!_batchHead.get(nextTokenId) && nextTokenId < _currentIndex ) { _owners[nextTokenId] = from; _batchHead.set(nextTokenId); } _owners[tokenId] = to; if(tokenId != tokenIdBatchHead) { _batchHead.set(tokenId); } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ownerOf(tokenId), to, tokenId); } /** * @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 startTransferTokenId uint256 the first ID of the tokens to be transferred * @param quantity uint256 amount of the tokens to be transfered. * @param _data bytes optional data to send along with the call * @return r bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 startTransferTokenId, uint256 quantity, bytes memory _data ) private returns (bool r) { if (to.isContract()) { r = true; for(uint256 tokenId = startTransferTokenId; tokenId < startTransferTokenId + quantity; tokenId++){ try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { r = r && retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721Psi: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } return r; } else { return true; } } function _getBatchHead(uint256 tokenId) internal view returns (uint256 tokenIdBatchHead) { tokenIdBatchHead = _batchHead.scanForward(tokenId); } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _currentIndex - _startTokenId(); } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view virtual override returns (uint256 tokenId) { require(index < totalSupply(), "ERC721Psi: global index out of bounds"); uint count; for( uint i = _startTokenId(); i < _currentIndex; ++i ){ if(_exists(i)){ if(count == index) return i; else count++; } } } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256 tokenId) { uint count; for( uint i = _startTokenId(); i < _currentIndex; ++i ){ if(_exists(i) && owner == ownerOf(i)){ if(count == index) return i; else count++; } } revert("ERC721Psi: owner index out of bounds"); } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * * startTransferTokenId - 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`. */ function _beforeTokenTransfers( address from, address to, uint256 startTransferTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes * minting. * * startTransferTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTransferTokenId, uint256 quantity ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (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) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol) pragma solidity ^0.8.0; /** * @dev Library for reading and writing primitive types to specific storage slots. * * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. * This library helps with reading and writing to such slots without the need for inline assembly. * * The functions in this library return Slot structs that contain a `value` member that can be used to read or write. * * Example usage to set ERC1967 implementation slot: * ``` * contract ERC1967 { * bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; * * function _getImplementation() internal view returns (address) { * return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; * } * * function _setImplementation(address newImplementation) internal { * require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract"); * StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; * } * } * ``` * * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._ */ library StorageSlot { struct AddressSlot { address value; } struct BooleanSlot { bool value; } struct Bytes32Slot { bytes32 value; } struct Uint256Slot { uint256 value; } /** * @dev Returns an `AddressSlot` with member `value` located at `slot`. */ function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `BooleanSlot` with member `value` located at `slot`. */ function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Bytes32Slot` with member `value` located at `slot`. */ function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } /** * @dev Returns an `Uint256Slot` with member `value` located at `slot`. */ function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) { /// @solidity memory-safe-assembly assembly { r.slot := slot } } }
// SPDX-License-Identifier: MIT /** _____ ___ ___ __ ____ _ __ / ___/____ / (_)___/ (_) /___ __ / __ )(_) /______ \__ \/ __ \/ / / __ / / __/ / / / / __ / / __/ ___/ ___/ / /_/ / / / /_/ / / /_/ /_/ / / /_/ / / /_(__ ) /____/\____/_/_/\__,_/_/\__/\__, / /_____/_/\__/____/ /____/ - npm: https://www.npmjs.com/package/solidity-bits - github: https://github.com/estarriolvetch/solidity-bits */ pragma solidity ^0.8.0; import "./BitScan.sol"; /** * @dev This Library is a modified version of Openzeppelin's BitMaps library. * Functions of finding the index of the closest set bit from a given index are added. * The indexing of each bucket is modifed to count from the MSB to the LSB instead of from the LSB to the MSB. * The modification of indexing makes finding the closest previous set bit more efficient in gas usage. */ /** * @dev Library for managing uint256 to bool mapping in a compact and efficient way, providing the keys are sequential. * Largelly inspired by Uniswap's https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol[merkle-distributor]. */ library BitMaps { using BitScan for uint256; uint256 private constant MASK_INDEX_ZERO = (1 << 255); uint256 private constant MASK_FULL = type(uint256).max; struct BitMap { mapping(uint256 => uint256) _data; } /** * @dev Returns whether the bit at `index` is set. */ function get(BitMap storage bitmap, uint256 index) internal view returns (bool) { uint256 bucket = index >> 8; uint256 mask = MASK_INDEX_ZERO >> (index & 0xff); return bitmap._data[bucket] & mask != 0; } /** * @dev Sets the bit at `index` to the boolean `value`. */ function setTo( BitMap storage bitmap, uint256 index, bool value ) internal { if (value) { set(bitmap, index); } else { unset(bitmap, index); } } /** * @dev Sets the bit at `index`. */ function set(BitMap storage bitmap, uint256 index) internal { uint256 bucket = index >> 8; uint256 mask = MASK_INDEX_ZERO >> (index & 0xff); bitmap._data[bucket] |= mask; } /** * @dev Unsets the bit at `index`. */ function unset(BitMap storage bitmap, uint256 index) internal { uint256 bucket = index >> 8; uint256 mask = MASK_INDEX_ZERO >> (index & 0xff); bitmap._data[bucket] &= ~mask; } /** * @dev Consecutively sets `amount` of bits starting from the bit at `startIndex`. */ function setBatch(BitMap storage bitmap, uint256 startIndex, uint256 amount) internal { uint256 bucket = startIndex >> 8; uint256 bucketStartIndex = (startIndex & 0xff); unchecked { if(bucketStartIndex + amount < 256) { bitmap._data[bucket] |= MASK_FULL << (256 - amount) >> bucketStartIndex; } else { bitmap._data[bucket] |= MASK_FULL >> bucketStartIndex; amount -= (256 - bucketStartIndex); bucket++; while(amount > 256) { bitmap._data[bucket] = MASK_FULL; amount -= 256; bucket++; } bitmap._data[bucket] |= MASK_FULL << (256 - amount); } } } /** * @dev Consecutively unsets `amount` of bits starting from the bit at `startIndex`. */ function unsetBatch(BitMap storage bitmap, uint256 startIndex, uint256 amount) internal { uint256 bucket = startIndex >> 8; uint256 bucketStartIndex = (startIndex & 0xff); unchecked { if(bucketStartIndex + amount < 256) { bitmap._data[bucket] &= ~(MASK_FULL << (256 - amount) >> bucketStartIndex); } else { bitmap._data[bucket] &= ~(MASK_FULL >> bucketStartIndex); amount -= (256 - bucketStartIndex); bucket++; while(amount > 256) { bitmap._data[bucket] = 0; amount -= 256; bucket++; } bitmap._data[bucket] &= ~(MASK_FULL << (256 - amount)); } } } /** * @dev Find the closest index of the set bit before `index`. */ function scanForward(BitMap storage bitmap, uint256 index) internal view returns (uint256 setBitIndex) { uint256 bucket = index >> 8; // index within the bucket uint256 bucketIndex = (index & 0xff); // load a bitboard from the bitmap. uint256 bb = bitmap._data[bucket]; // offset the bitboard to scan from `bucketIndex`. bb = bb >> (0xff ^ bucketIndex); // bb >> (255 - bucketIndex) if(bb > 0) { unchecked { setBitIndex = (bucket << 8) | (bucketIndex - bb.bitScanForward256()); } } else { while(true) { require(bucket > 0, "BitMaps: The set bit before the index doesn't exist."); unchecked { bucket--; } // No offset. Always scan from the least significiant bit now. bb = bitmap._data[bucket]; if(bb > 0) { unchecked { setBitIndex = (bucket << 8) | (255 - bb.bitScanForward256()); break; } } } } } function getBucket(BitMap storage bitmap, uint256 bucket) internal view returns (uint256) { return bitmap._data[bucket]; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT /** _____ ___ ___ __ ____ _ __ / ___/____ / (_)___/ (_) /___ __ / __ )(_) /______ \__ \/ __ \/ / / __ / / __/ / / / / __ / / __/ ___/ ___/ / /_/ / / / /_/ / / /_/ /_/ / / /_/ / / /_(__ ) /____/\____/_/_/\__,_/_/\__/\__, / /_____/_/\__/____/ /____/ - npm: https://www.npmjs.com/package/solidity-bits - github: https://github.com/estarriolvetch/solidity-bits */ pragma solidity ^0.8.0; library BitScan { uint256 constant private DEBRUIJN_256 = 0x818283848586878898a8b8c8d8e8f929395969799a9b9d9e9faaeb6bedeeff; bytes constant private LOOKUP_TABLE_256 = hex"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"; /** @dev Isolate the least significant set bit. */ function isolateLS1B256(uint256 bb) pure internal returns (uint256) { require(bb > 0); unchecked { return bb & (0 - bb); } } /** @dev Isolate the most significant set bit. */ function isolateMS1B256(uint256 bb) pure internal returns (uint256) { require(bb > 0); unchecked { bb |= bb >> 128; bb |= bb >> 64; bb |= bb >> 32; bb |= bb >> 16; bb |= bb >> 8; bb |= bb >> 4; bb |= bb >> 2; bb |= bb >> 1; return (bb >> 1) + 1; } } /** @dev Find the index of the lest significant set bit. (trailing zero count) */ function bitScanForward256(uint256 bb) pure internal returns (uint8) { unchecked { return uint8(LOOKUP_TABLE_256[(isolateLS1B256(bb) * DEBRUIJN_256) >> 248]); } } /** @dev Find the index of the most significant set bit. */ function bitScanReverse256(uint256 bb) pure internal returns (uint8) { unchecked { return 255 - uint8(LOOKUP_TABLE_256[((isolateMS1B256(bb) * DEBRUIJN_256) >> 248)]); } } function log2(uint256 bb) pure internal returns (uint8) { unchecked { return uint8(LOOKUP_TABLE_256[(isolateMS1B256(bb) * DEBRUIJN_256) >> 248]); } } }
{ "optimizer": { "enabled": true, "runs": 690 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.