ERC-721
Overview
Max Total Supply
0 HUMAN
Holders
649
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
3 HUMANLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
Human
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @author: HodlCaulfield import '@openzeppelin/contracts/token/ERC721/ERC721.sol'; import '@openzeppelin/contracts/access/Ownable.sol'; import '@openzeppelin/contracts/utils/Strings.sol'; import '@openzeppelin/contracts/token/ERC1155/utils/ERC1155Holder.sol'; import '@openzeppelin/contracts/token/ERC1155/IERC1155.sol'; import './RandomlyAssigned.sol'; /* __ __ ____ ____ ___ ___ __ _____ ___ ________ /" | | "\ (" _||_ " ||" \ /" | /""\ (\" \|" \ /" ) (: (__) :)| ( ) : | \ \ // | / \ |.\\ \ |(: \___/ \/ \/ (: | | . ) /\\ \/. | /' /\ \ |: \. \\ | \___ \ // __ \\ \\ \__/ // |: \. | // __' \ |. \ \. | __/ \\ (: ( ) :) /\\ __ //\ |. \ /: | / / \\ \| \ \ | /" \ :) \__| |__/ (__________)|___|\__/|___|(___/ \___)\___|\____\)(_______/ ';;;;;' ~uPPK%ggg%qwz, '7WN%%%gg%%DDbqADX*' ,~LDQQQQXj>. =6QQ8%%%%%%%%%%%%%DKKKy; rUBQ8%MW#NgDDKy~ |QQ#%%%%%%%%%%%g%%%%%DqWK` L#QgRNWR%%##%Rb%q! MQQN%%%%%%ggggRDDDRg%%RqgD WQQBQ8bR8QQQB8&DQj 6QQQN%%%%ggDbKDDDRRDR%%D8D ,zQQ@QQQNQ@@QQ@@Q@D~`` `Q@QB%NQ8dqkmSmSSPRN%MNQR; %RDMQ@@@QWQQQQQQQ@z ,gQQ@Q#BQRDRXgQd%g&@Q8|' LdkQ%gQ@QQQBQ@WDS;` ;SQ@QWd6mwUkUUS6QQf~ `jR8QQQQQQQ@%Xi' ,;x%RUPm6%UmKb7' ,RQBdPm%%QDXI_ 'PBK%QgUn_ u%dqQgK%K%DZaQ7 ^jXywUwwk6Sz~ ?%dRP^XNPmSXRbQc zDZPR5I5SSwz{Qx ;fKdm|UMXwfjQ#Q7 ````` ;DAKdvSPYSmsPdQt ,\6KD8BKjyQgWi,,,:,,'` =yodPrPqfPStNBQt XQQQQu=;D}!L7c*==r!, ,\Dg%DqSu7N%RP~ yP7\i*r^~dn^|Li||\7?' .PQdqWq\nN&Qy` qm>^^*|r~di`,;;;^^~. wbZRKkPZQQXNy qB%m;.'wdQi =qdKBuzDwQn;;` qQ@7 DQ@i X%q8| ,q6Q7 qQ@7 DQ@o' XWQJ 66#7 `''d@@7 `K@@I'` XgQJ ADNo, `adWQQQ@7 q@Q@Qmyi k#QJ ,UMQJ `BQQQBDQ7 q@QQQgQa DQNDKQJ XQDDQy mDKqKkd= YDKKKUKc ______ _______ _____ ___ _______ ___________ / " \ /" "| (\" \|" \ /" "|(" _ ") // ____ \(: ______) |.\\ \ |(: ______) )__/ \\__/ / / ) :)\/ | |: \. \\ | \/ | \\_ / (: (____/ // // ___) |. \ \. | // ___) |. | \ / (: ( | \ \ |(: ( \: | \"_____/ \__/ \___|\____\) \__/ \__| */ contract Human is ERC721, ERC1155Holder, Ownable, RandomlyAssigned { using Strings for uint256; /* * Private Variables */ uint256 private constant NUMBER_OF_GENESIS_HUMANS = 229; // there are 229 Humans in the Genesis Collection uint256 private constant NUMBER_OF_RESERVED_HUMANS = 35; uint256 private constant MAX_HUMANS_SUPPLY = 1500; // collection size (including genesis and honoraries) uint256 private constant MAX_TEAM_HUMANS = 69; // reserved for the team and marketing uint256 private constant MAX_MINTS_PER_ADDRESS = 4; // max total mints (incl. presale, excl. author and genesis claims) uint256 private constant MAX_PRESALE_MINTS_PER_ADDRESS = 2; // max mints during presale per address struct MintTypes { uint256 _numberOfAuthorMintsByAddress; uint256 _numberOfMintsByAddress; } struct Coupon { bytes32 r; bytes32 s; uint8 v; } enum CouponType { Genesis, Author, Presale } enum SalePhase { Locked, PreSale, PublicSale } address private immutable _teamAddress = 0x5ad0A1eA6d7863c3930a0125bC22770A358Ebee9; address private immutable _adminSigner; address private immutable _openseaSharedContractAddress; string private _defaultUri; string private _tokenBaseURI; /* * Public Variables */ bool public claimActive = false; bool public metadataIsFrozen = false; SalePhase public phase = SalePhase.Locked; uint256 public mintPrice = 0.025 ether; uint256 public teamTokensMinted; mapping(address => MintTypes) public addressToMints; /* * Constructor */ constructor( string memory uri, address adminSigner, address openseaAddress ) ERC721('Humans Of NFT', 'HUMAN') RandomlyAssigned( MAX_HUMANS_SUPPLY, NUMBER_OF_GENESIS_HUMANS + NUMBER_OF_RESERVED_HUMANS ) { _defaultUri = uri; _adminSigner = adminSigner; _openseaSharedContractAddress = openseaAddress; } // ======================================================== Owner Functions /// Set the base URI for the metadata /// @dev modifies the state of the `_tokenBaseURI` variable /// @param URI the URI to set as the base token URI function setBaseURI(string memory URI) external onlyOwner { require(!metadataIsFrozen, 'Metadata is permanently frozen'); _tokenBaseURI = URI; } /// Freezes the metadata /// @dev sets the state of `metadataIsFrozen` to true /// @notice permamently freezes the metadata so that no more changes are possible function freezeMetadata() external onlyOwner { require(!metadataIsFrozen, 'Metadata is already frozen'); metadataIsFrozen = true; } /// Adjust the mint price /// @dev modifies the state of the `mintPrice` variable /// @notice sets the price for minting a token /// @param newPrice_ The new price for minting function adjustMintPrice(uint256 newPrice_) external onlyOwner { mintPrice = newPrice_; } /// Advance Phase /// @dev Advance the sale phase state /// @notice Advances sale phase state incrementally function enterPhase(SalePhase phase_) external onlyOwner { require(uint8(phase_) > uint8(phase), 'can only advance phases'); phase = phase_; } /// Activate claiming /// @dev set the state of `claimActive` variable to true /// @notice Activate the claiming event function activateClaiming() external onlyOwner { claimActive = true; } /// Reserve tokens for the team + marketing /// @dev Mints the number of tokens passed in as count to the _teamAddress /// @param count The number of tokens to mint function devReserveTokens(uint256 count) external onlyOwner ensureAvailabilityFor(count) { require( count + teamTokensMinted <= MAX_TEAM_HUMANS, 'Exceeds the reserved supply of team tokens' ); for (uint256 i = 0; i < count; i++) { _mintRandomId(_teamAddress); } teamTokensMinted += count; } /// Disburse payments /// @dev transfers amounts that correspond to addresses passeed in as args /// @param payees_ recipient addresses /// @param amounts_ amount to payout to address with corresponding index in the `payees_` array function disbursePayments( address[] memory payees_, uint256[] memory amounts_ ) external onlyOwner { require( payees_.length == amounts_.length, 'Payees and amounts length mismatch' ); for (uint256 i; i < payees_.length; i++) { makePaymentTo(payees_[i], amounts_[i]); } } /// Make a payment /// @dev internal fn called by `disbursePayments` to send Ether to an address function makePaymentTo(address address_, uint256 amt_) private { (bool success, ) = address_.call{value: amt_}(''); require(success, 'Transfer failed.'); } // ======================================================== External Functions /// Claim Genesis Tokens /// @dev mints genesis token IDs using verified coupons signed by an admin address /// @notice uses the the coupon supplied to confirm that only the owner of the original ID can claim /// @param idxsToClaim the indexes for the IDs array of the tokens claimed in this TX /// @param idsOfOwner IDs of genesis tokens belonging to the caller used to verify the coupon /// @param coupon coupon for verifying the signer function claimReservedTokensByIds( address owner_, uint256[] calldata idxsToClaim, uint256[] calldata idsOfOwner, Coupon memory coupon ) external { require(claimActive, 'Claim event is not active'); bytes32 digest = keccak256( abi.encode(CouponType.Genesis, idsOfOwner, owner_) ); require(_isVerifiedCoupon(digest, coupon), 'Invalid coupon'); for (uint256 i; i < idxsToClaim.length; i++) { uint256 tokenId = idsOfOwner[idxsToClaim[i]]; _claimReservedToken(owner_, tokenId); } } /// Claim Author Tokens /// @dev mints the qty of tokens verified using coupons signed by an admin signer /// @notice claims free tokens earned by Authors /// @param count number of tokens to claim in transaction /// @param allotted total number of tokens author is allowed to claim /// @param coupon coupon for verifying the signer function claimAuthorTokens( uint256 count, uint256 allotted, Coupon memory coupon ) public ensureAvailabilityFor(count) { require(claimActive, 'Claim event is not active'); bytes32 digest = keccak256( abi.encode(CouponType.Author, allotted, msg.sender) ); require(_isVerifiedCoupon(digest, coupon), 'Invalid coupon'); require( count + addressToMints[msg.sender]._numberOfAuthorMintsByAddress <= allotted, 'Exceeds number of earned Tokens' ); addressToMints[msg.sender]._numberOfAuthorMintsByAddress += count; for (uint256 i; i < count; i++) { _mintRandomId(msg.sender); } } /// Mint during presale /// @dev mints by addresses validated using verified coupons signed by an admin signer /// @notice mints tokens with randomized token IDs to addresses eligible for presale /// @param count number of tokens to mint in transaction /// @param coupon coupon signed by an admin coupon function mintPresale(uint256 count, Coupon memory coupon) external payable ensureAvailabilityFor(count) validateEthPayment(count) { require(phase == SalePhase.PreSale, 'Presale event is not active'); require( count + addressToMints[msg.sender]._numberOfMintsByAddress <= MAX_PRESALE_MINTS_PER_ADDRESS, 'Exceeds number of presale mints allowed' ); bytes32 digest = keccak256(abi.encode(CouponType.Presale, msg.sender)); require(_isVerifiedCoupon(digest, coupon), 'Invalid coupon'); addressToMints[msg.sender]._numberOfMintsByAddress += count; for (uint256 i; i < count; i++) { _mintRandomId(msg.sender); } } /// Public minting open to all /// @dev mints tokens during public sale, limited by `MAX_MINTS_PER_ADDRESS` /// @notice mints tokens with randomized IDs to the sender's address /// @param count number of tokens to mint in transaction function mint(uint256 count) external payable validateEthPayment(count) ensureAvailabilityFor(count) { require(phase == SalePhase.PublicSale, 'Public sale is not active'); require( count + addressToMints[msg.sender]._numberOfMintsByAddress <= MAX_MINTS_PER_ADDRESS, 'Exceeds maximum allowable mints' ); addressToMints[msg.sender]._numberOfMintsByAddress += count; for (uint256 i; i < count; i++) { _mintRandomId(msg.sender); } } /// override ERC1155Received to mint replacement tokens /// @dev receive a verified token and mint its replacement /// @param from the account who initiated the transfer and will claim the mint /// @param id the opensea token ID /// @param data encoded genesis ID and coupon function onERC1155Received( address, address from, uint256 id, uint256, bytes memory data ) public virtual override returns (bytes4) { require( msg.sender == _openseaSharedContractAddress, 'Sender not approved' ); (uint256 genesisId, Coupon memory coupon) = abi.decode( data, (uint256, Coupon) ); bytes32 digest = keccak256( abi.encode(CouponType.Genesis, genesisId, id) ); require(_isVerifiedCoupon(digest, coupon), 'Invalid coupon'); _claimReservedToken(from, genesisId); return this.onERC1155Received.selector; } /// Override the batch receive /// @dev revert as nobody should ever call this and we don't want the contract to receive any other tokens function onERC1155BatchReceived( address, address, uint256[] memory, uint256[] memory, bytes memory ) public override returns (bytes4) { revert('Batch Receiving not allowed.'); } // ======================================================== Overrides /// Return the tokenURI for a given ID /// @dev overrides ERC721's `tokenURI` function and returns either the `_tokenBaseURI` or a custom URI /// @notice reutrns the tokenURI using the `_tokenBase` URI if the token ID hasn't been suppleid with a unique custom URI function tokenURI(uint256 tokenId) public view override(ERC721) returns (string memory) { require(_exists(tokenId), 'Cannot query non-existent token'); return bytes(_tokenBaseURI).length > 0 ? string( abi.encodePacked(_tokenBaseURI, '/', tokenId.toString()) ) : _defaultUri; } /// override supportsInterface because two base classes define it /// @dev See {IERC165-supportsInterface}. function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721, ERC1155Receiver) returns (bool) { return ERC721.supportsInterface(interfaceId) || ERC1155Receiver.supportsInterface(interfaceId); } // ======================================================== Internal Functions /// @dev check that the coupon sent was signed by the admin signer function _isVerifiedCoupon(bytes32 digest, Coupon memory coupon) internal view returns (bool) { // address signer = digest.recover(signature); address signer = ecrecover(digest, coupon.v, coupon.r, coupon.s); require(signer != address(0), 'ECDSA: invalid signature'); // Added check for zero address return signer == _adminSigner; } /// @dev internal check to ensure a genesis token ID, or ID outside of the collection, doesn't get minted function _mintRandomId(address to) private { uint256 id = nextToken(); assert( id > NUMBER_OF_GENESIS_HUMANS + NUMBER_OF_RESERVED_HUMANS && id <= MAX_HUMANS_SUPPLY ); _safeMint(to, id); } /// @dev mints a token with a known ID, must fall within desired range function _claimReservedToken(address to, uint256 id) internal { assert(id != 0); assert(id <= NUMBER_OF_GENESIS_HUMANS + NUMBER_OF_RESERVED_HUMANS); if (!_exists(id)) { _safeMint(to, id); } } // ======================================================== Modifiers /// Modifier to validate Eth payments on payable functions /// @dev compares the product of the state variable `_mintPrice` and supplied `count` to msg.value /// @param count factor to multiply by modifier validateEthPayment(uint256 count) { require( mintPrice * count <= msg.value, 'Ether value sent is not correct' ); _; } } // End of Contract
// SPDX-License-Identifier: MIT 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 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 = 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 { require(operator != _msgSender(), "ERC721: 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), "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 || getApproved(tokenId) == spender || isApprovedForAll(owner, 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); } /** * @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); } /** * @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 of token that is not own"); 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); } /** * @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 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 {} }
// SPDX-License-Identifier: MIT 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() { _setOwner(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _setOwner(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _setOwner(newOwner); } function _setOwner(address newOwner) private { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./ERC1155Receiver.sol"; /** * @dev _Available since v3.1._ */ contract ERC1155Holder is ERC1155Receiver { function onERC1155Received( address, address, uint256, uint256, bytes memory ) public virtual override returns (bytes4) { return this.onERC1155Received.selector; } function onERC1155BatchReceived( address, address, uint256[] memory, uint256[] memory, bytes memory ) public virtual override returns (bytes4) { return this.onERC1155BatchReceived.selector; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC1155 compliant contract, as defined in the * https://eips.ethereum.org/EIPS/eip-1155[EIP]. * * _Available since v3.1._ */ interface IERC1155 is IERC165 { /** * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`. */ event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value); /** * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all * transfers. */ event TransferBatch( address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values ); /** * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to * `approved`. */ event ApprovalForAll(address indexed account, address indexed operator, bool approved); /** * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI. * * If an {URI} event was emitted for `id`, the standard * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value * returned by {IERC1155MetadataURI-uri}. */ event URI(string value, uint256 indexed id); /** * @dev Returns the amount of tokens of token type `id` owned by `account`. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) external view returns (uint256); /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory); /** * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`, * * Emits an {ApprovalForAll} event. * * Requirements: * * - `operator` cannot be the caller. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns true if `operator` is approved to transfer ``account``'s tokens. * * See {setApprovalForAll}. */ function isApprovedForAll(address account, address operator) external view returns (bool); /** * @dev Transfers `amount` tokens of token type `id` from `from` to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}. * - `from` must have a balance of tokens of type `id` of at least `amount`. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes calldata data ) external; /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}. * * Emits a {TransferBatch} event. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function safeBatchTransferFrom( address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import './WithLimitedSupply.sol'; /// @author Modified version of original code by 1001.digital /// @title Randomly assign tokenIDs from a given set of tokens. abstract contract RandomlyAssigned is WithLimitedSupply { // Used for random index assignment mapping(uint256 => uint256) private tokenMatrix; // The initial token ID uint256 private immutable startFrom; /// Instanciate the contract /// @param maxSupply_ how many tokens this collection should hold /// @param numReserved_ the number of tokens reserved whose IDs dont come from the randomizer constructor(uint256 maxSupply_, uint256 numReserved_) WithLimitedSupply(maxSupply_, numReserved_) { startFrom = numReserved_ + 1; } /// Get the next token ID /// @dev Randomly gets a new token ID and keeps track of the ones that are still available. /// @return the next token ID function nextToken() internal override returns (uint256) { uint256 maxIndex = maxAvailableSupply() - tokenCount(); uint256 random = uint256( keccak256( abi.encodePacked( msg.sender, block.coinbase, block.difficulty, block.gaslimit, block.timestamp ) ) ) % maxIndex; uint256 value = 0; if (tokenMatrix[random] == 0) { // If this matrix position is empty, set the value to the generated random number. value = random; } else { // Otherwise, use the previously stored number from the matrix. value = tokenMatrix[random]; } // If the last available tokenID is still unused... if (tokenMatrix[maxIndex - 1] == 0) { // ...store that ID in the current matrix position. tokenMatrix[random] = maxIndex - 1; } else { // ...otherwise copy over the stored number to the current matrix position. tokenMatrix[random] = tokenMatrix[maxIndex - 1]; } // Increment counts (ie. qty minted) super.nextToken(); return value + startFrom; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT 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 pragma solidity ^0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./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 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 pragma solidity ^0.8.0; import "../IERC1155Receiver.sol"; import "../../../utils/introspection/ERC165.sol"; /** * @dev _Available since v3.1._ */ abstract contract ERC1155Receiver is ERC165, IERC1155Receiver { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev _Available since v3.1._ */ interface IERC1155Receiver is IERC165 { /** @dev Handles the receipt of a single ERC1155 token type. This function is called at the end of a `safeTransferFrom` after the balance has been updated. To accept the transfer, this must return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` (i.e. 0xf23a6e61, or its own function selector). @param operator The address which initiated the transfer (i.e. msg.sender) @param from The address which previously owned the token @param id The ID of the token being transferred @param value The amount of tokens being transferred @param data Additional data with no specified format @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed */ function onERC1155Received( address operator, address from, uint256 id, uint256 value, bytes calldata data ) external returns (bytes4); /** @dev Handles the receipt of a multiple ERC1155 token types. This function is called at the end of a `safeBatchTransferFrom` after the balances have been updated. To accept the transfer(s), this must return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` (i.e. 0xbc197c81, or its own function selector). @param operator The address which initiated the batch transfer (i.e. msg.sender) @param from The address which previously owned the token @param ids An array containing ids of each token being transferred (order and length must match values array) @param values An array containing amounts of each token being transferred (order and length must match ids array) @param data Additional data with no specified format @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed */ function onERC1155BatchReceived( address operator, address from, uint256[] calldata ids, uint256[] calldata values, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; /// @author Modified version of original code by 1001.digital /// @title A token tracker that limits the token supply and increments token IDs on each new mint. abstract contract WithLimitedSupply { // Keeps track of how many we have minted uint256 private _tokenCount; /// @dev The maximum count of tokens this token tracker will issue. uint256 private immutable _maxAvailableSupply; /// Instanciate the contract /// @param maxSupply_ how many tokens this collection should hold constructor(uint256 maxSupply_, uint256 reserved_) { _maxAvailableSupply = maxSupply_ - reserved_; } function maxAvailableSupply() public view returns (uint256) { return _maxAvailableSupply; } /// @dev Get the current token count /// @return the created token count /// TODO: if this is not required externally, does making it `public view` use unneccary gas? function tokenCount() public view returns (uint256) { return _tokenCount; } /// @dev Check whether tokens are still available /// @return the available token count function availableTokenCount() public view returns (uint256) { return maxAvailableSupply() - tokenCount(); } /// @dev Increment the token count and fetch the latest count /// @return the next token id function nextToken() internal virtual ensureAvailability returns (uint256) { return _tokenCount++; } /// @dev Check whether another token is still available modifier ensureAvailability() { require(availableTokenCount() > 0, 'No more tokens available'); _; } /// @param amount Check whether number of tokens are still available /// @dev Check whether tokens are still available modifier ensureAvailabilityFor(uint256 amount) { require( availableTokenCount() >= amount, 'Requested number of tokens not available' ); _; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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- No Contract Security Audit Submitted- Submit Audit Here
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Human.Coupon","name":"coupon","type":"tuple"}],"name":"claimAuthorTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner_","type":"address"},{"internalType":"uint256[]","name":"idxsToClaim","type":"uint256[]"},{"internalType":"uint256[]","name":"idsOfOwner","type":"uint256[]"},{"components":[{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint8","name":"v","type":"uint8"}],"internalType":"struct Human.Coupon","name":"coupon","type":"tuple"}],"name":"claimReservedTokensByIds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"count","type":"uint256"}],"name":"devReserveTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"payees_","type":"address[]"},{"internalType":"uint256[]","name":"amounts_","type":"uint256[]"}],"name":"disbursePayments","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"enum Human.SalePhase","name":"phase_","type":"uint8"}],"name":"enterPhase","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"freezeMetadata","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxAvailableSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"metadataIsFrozen","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"count","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"count","type":"uint256"},{"components":[{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"},{"internalType":"uint8","name":"v","type":"uint8"}],"internalType":"struct Human.Coupon","name":"coupon","type":"tuple"}],"name":"mintPresale","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"mintPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"uint256[]","name":"","type":"uint256[]"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC1155BatchReceived","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC1155Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"phase","outputs":[{"internalType":"enum Human.SalePhase","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"URI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"teamTokensMinted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"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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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000000000000000000000000000000000000000000060000000000000000000000000c7eb865d2d4f6033cae0e81248173209a2e6843d000000000000000000000000495f947276749ce646f68ac8c248420045cb7b5e000000000000000000000000000000000000000000000000000000000000005668747470733a2f2f68756d616e736f666e66742e6d7970696e6174612e636c6f75642f697066732f516d59646b43714e314b666234695575425631734d506641644279483268486d684e66576a67784447474c5a397300000000000000000000
-----Decoded View---------------
Arg [0] : uri (string): https://humansofnft.mypinata.cloud/ipfs/QmYdkCqN1Kfb4iUuBV1sMPfAdByH2hHmhNfWjgxDGGLZ9s
Arg [1] : adminSigner (address): 0xc7EB865d2D4f6033cAe0e81248173209A2E6843d
Arg [2] : openseaAddress (address): 0x495f947276749Ce646f68AC8c248420045cb7b5e
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [1] : 000000000000000000000000c7eb865d2d4f6033cae0e81248173209a2e6843d
Arg [2] : 000000000000000000000000495f947276749ce646f68ac8c248420045cb7b5e
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000056
Arg [4] : 68747470733a2f2f68756d616e736f666e66742e6d7970696e6174612e636c6f
Arg [5] : 75642f697066732f516d59646b43714e314b666234695575425631734d506641
Arg [6] : 644279483268486d684e66576a67784447474c5a397300000000000000000000
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.