Contract Name:
NiftyBuilderInstance
Contract Source Code:
// File: contracts/core/NiftyEntity.sol
/**
* @dev Authenticator of state mutating operations for Nifty Gateway contracts.
*
* addresses for stateful operations.
*
* Rinkeby: 0xCefBf44ff649B6E0Bc63785699c6F1690b8cF73b
* Mainnet: 0x6e53130dDfF21E3BC963Ee902005223b9A202106
*/
contract NiftyEntity {
// Address of {NiftyRegistry} contract.
address internal immutable niftyRegistryContract;
/**
* @dev Determines whether accounts are allowed to invoke state mutating operations on child contracts.
*/
modifier onlyValidSender() {
NiftyRegistry niftyRegistry = NiftyRegistry(niftyRegistryContract);
bool isValid = niftyRegistry.isValidNiftySender(msg.sender);
require(isValid, "NiftyEntity: Invalid msg.sender");
_;
}
/**
* @param _niftyRegistryContract Points to the repository of authenticated
*/
constructor(address _niftyRegistryContract) {
niftyRegistryContract = _niftyRegistryContract;
}
}
/**
* @dev Defined to mediate interaction with externally deployed {NiftyRegistry} dependency.
*/
interface NiftyRegistry {
function isValidNiftySender(address sending_key) external view returns (bool);
}
// File: contracts/interface/IERC165.sol
/**
* @title IERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
interface IERC165 {
/**
* @notice Query if a contract implements an interface
* @param interfaceId The interface identifier, as specified in ERC-165
* @dev Interface identification is specified in ERC-165. This function
* uses less than 30,000 gas.
*/
function supportsInterface(bytes4 interfaceId)
external
view
returns (bool);
}
// File: contracts/interface/IERC721.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;
}
// File: contracts/interface/IERC721Receiver.sol
/**
* @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);
}
// File: contracts/interface/IERC721Metadata.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);
}
// File: contracts/util/Context.sol
/*
* @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;
}
}
// File: contracts/util/Strings.sol
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "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);
}
}
// File: contracts/standard/ERC165.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;
}
}
// File: contracts/core/ERC721.sol
/**
* @dev Nifty Gateway implementation of Non-Fungible Token Standard.
*/
contract ERC721 is NiftyEntity, Context, ERC165, IERC721, IERC721Metadata {
// Tracked individual instance spawned by {BuilderShop} contract.
uint immutable public _id;
// Number of distinct NFTs housed in this contract.
uint immutable public _typeCount;
// Intial receiver of all newly minted NFTs.
address immutable public _defaultOwner;
// Component(s) of 'tokenId' calculation.
uint immutable internal topLevelMultiplier;
uint immutable internal midLevelMultiplier;
// Token name.
string private _name;
// Token symbol.
string private _symbol;
// Token artifact location.
string private _baseURI;
// Mapping from Nifty type to name of token.
mapping(uint256 => string) private _niftyTypeName;
// Mapping from Nifty type to IPFS hash of canonical artifcat file.
mapping(uint256 => string) private _niftyTypeIPFSHashes;
// Mapping from token ID to owner address.
mapping (uint256 => address) internal _owners;
// Mapping owner address to token count, by aggregating all _typeCount NFTs in the contact.
mapping (address => uint256) internal _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 token collection.
*
* @param name_ Of the collection being deployed.
* @param symbol_ Shorthand token identifier, for wallets, etc.
* @param id_ Number instance deployed by {BuilderShop} contract.
* @param baseURI_ The location where the artifact assets are stored.
* @param typeCount_ The number of different Nifty types (different
* individual NFTs) associated with the deployed collection.
* @param defaultOwner_ Intial receiver of all newly minted NFTs.
* @param niftyRegistryContract Points to the repository of authenticated
* addresses for stateful operations.
*/
constructor(string memory name_,
string memory symbol_,
uint256 id_,
string memory baseURI_,
uint256 typeCount_,
address defaultOwner_,
address niftyRegistryContract) NiftyEntity(niftyRegistryContract) {
_name = name_;
_symbol = symbol_;
_id = id_;
_baseURI = baseURI_;
_typeCount = typeCount_;
_defaultOwner = defaultOwner_;
midLevelMultiplier = 10000;
topLevelMultiplier = id_ * 100000000;
}
/**
* @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 Returns the link to artificat location for a given token by 'tokenId'.
* Throws if the token ID does not exist. May return an empty string.
* @param tokenId uint256 ID of the token to query.
* @return The location where the artifact assets are stored.
*/
function tokenURI(uint256 tokenId) external view override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory tokenIdStr = Strings.toString(tokenId);
return string(abi.encodePacked(_baseURI, tokenIdStr));
}
/**
* @dev Returns an IPFS hash for a given token ID.
* Throws if the token ID does not exist. May return an empty string.
* @param tokenId uint256 ID of the token to query.
* @return IPFS hash for this (_typeCount) NFT.
*/
function tokenIPFSHash(uint256 tokenId) external view returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: IPFS hash query for nonexistent token");
uint256 niftyType = _getNiftyTypeId(tokenId);
return _niftyTypeIPFSHashes[niftyType];
}
/**
* @dev Determine which NFT in the contract (_typeCount) is associated
* with this 'tokenId'.
*/
function _getNiftyTypeId(uint256 tokenId) private view returns (uint256) {
return (tokenId - topLevelMultiplier) / midLevelMultiplier;
}
/**
* @dev Returns the Name for a given token ID.
* Throws if the token ID does not exist. May return an empty string.
* @param tokenId uint256 ID of the token to query
*/
function tokenName(uint256 tokenId) external view returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: Name query for nonexistent token");
uint256 niftyType = _getNiftyTypeId(tokenId);
return _niftyTypeName[niftyType];
}
/**
* @dev Internal function to set the token IPFS hash for a nifty type.
* @param niftyType uint256 ID component of the token to set its IPFS hash
* @param ipfs_hash string IPFS link to assign
*/
function _setTokenIPFSHashNiftyType(uint256 niftyType, string memory ipfs_hash) internal {
require(bytes(_niftyTypeIPFSHashes[niftyType]).length == 0, "ERC721Metadata: IPFS hash already set");
_niftyTypeIPFSHashes[niftyType] = ipfs_hash;
}
/**
* @dev Internal function to set the name for a nifty type.
* @param niftyType uint256 of nifty type name to be set
* @param nifty_type_name name of nifty type
*/
function _setNiftyTypeName(uint256 niftyType, string memory nifty_type_name) internal {
_niftyTypeName[niftyType] = nifty_type_name;
}
/**
* @dev Base URI for computing {tokenURI}.
*/
function _setBaseURI(string memory baseURI_) internal {
_baseURI = baseURI_;
}
/**
* @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 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);
// 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");
// 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 (isContract(to)) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
// solhint-disable-next-line no-inline-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @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;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
}
// File: contracts/standard/ERC721Burnable.sol
/**
* @title ERC721 Burnable Token
* @dev ERC721 Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721Burnable is Context, ERC721 {
/**
* @dev Burns `tokenId`. See {ERC721-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721Burnable: caller is not owner nor approved");
_burn(tokenId);
}
}
// File: contracts/core/NiftyBuilderInstance.sol
/**
* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX .*** XXXXXXXXXXXXXXXXXX
* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX ,********* XXXXXXXXXXXXXXXX
* XXXXXXXXXXXXXXXXXXXXXXXXXXXX *************** XXXXXXXXXXXXX
* XXXXXXXXXXXXXXXXXXXXXXXXX .******************* XXXXXXXXXXX
* XXXXXXXXXXXXXXXXXXXXXXX *********** ********** XXXXXXXX
* XXXXXXXXXXXXXXXXXXXX *********** *********** XXXXXX
* XXXXXXXXXXXXXXXXXX *********** *************** XXX
* XXXXXXXXXXXXXXXX *********** **** ********* XX
* XXXXXXXXXXXXXXXX ********* *** *** ********* X
* XXXXXXXXXXXXXXXX ********** ***** *********** XXX
* XXXXXXXXXXXX /////.************* *********** XXXX
* XXXXXXXXX /////////...*********** ************ XXXXXX
* XXXXXXX/ ///////////..... ///////// /////////// XXXXXXXX
* XXXXXX / //////........./////////////////// XXXXXXXXXX
* XXXXXXXXXX .///////...........////////////// XXXXXXXXXXXXX
* XXXXXXXXX .///////.....//..//// ///////// XXXXXXXXXXXXXXXX
* XXXXXXX# ///////////////////// XXXXXXXXXXXXXXXXXXXXXXXXXXXX
* XXXXX //////////////////// XXXXXXXXXXXXXXXXXXXXXXXXXXXXX
* XX ////////////// ////// XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
*
* @dev Nifty Gateway extension of customized NFT contract, encapsulates
* logic for minting new tokens, and concluding the minting process.
*/
contract NiftyBuilderInstance is ERC721, ERC721Burnable {
// The artist associated with the collection.
string private _creator;
// Number of NFTs minted for a given 'typeCount'.
mapping (uint256 => uint256) public _mintCount;
/**
* @dev Serves as a gas cost optimized boolean flag
* to indicate whether the minting process has been
* concluded for a given 'typeCount', correspinds
* to the {_getFinalized} and {setFinalized}.
*/
mapping (uint256 => bytes32) private _finalized;
/**
* @dev Emitted when tokens are created.
*/
event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed fromAddress, address indexed toAddress);
/**
* @dev Ultimate instantiation of a Nifty Gateway NFT collection.
*
* @param name Of the collection being deployed.
* @param symbol Shorthand token identifier, for wallets, etc.
* @param id Number instance deployed by {BuilderShop} contract.
* @param typeCount The number of different Nifty types (different
* individual NFTs) associated with the deployed collection.
* @param baseURI The location where the artifact assets are stored.
* @param creator_ The artist associated with the collection.
* @param niftyRegistryContract Points to the repository of authenticated
* addresses for stateful operations.
* @param defaultOwner Intial receiver of all newly minted NFTs.
*/
constructor(
string memory name,
string memory symbol,
uint256 id,
uint256 typeCount,
string memory baseURI,
string memory creator_,
address niftyRegistryContract,
address defaultOwner) ERC721(name, symbol, id, baseURI, typeCount, defaultOwner, niftyRegistryContract) {
_creator = creator_;
}
/**
* @dev Generate canonical Nifty Gateway token representation.
* Nifty contracts have a data model called a 'niftyType' (typeCount)
* The 'niftyType' refers to a specific nifty in our contract, note
* that it gives no information about the edition size. In a given
* contract, 'niftyType' 1 could be an edition of 10, while 'niftyType'
* 2 is a 1/1, etc.
* The token IDs are encoded as follows: {id}{niftyType}{edition #}
* 'niftyType' has 4 digits, and edition number does as well, to allow
* for 9999 possible 'niftyType' and 9999 of each edition in each contract.
* Example token id: [500010270]
* This is from contract #5, it is 'niftyType' 1 in the contract, and it is
* edition #270 of 'niftyType' 1.
*/
function _encodeTokenId(uint256 niftyType, uint256 tokenNumber) private view returns (uint256) {
return (topLevelMultiplier + (niftyType * midLevelMultiplier) + tokenNumber);
}
/**
* @dev Determine whether it is possible to mint additional NFTs for this 'niftyType'.
*/
function _getFinalized(uint256 niftyType) public view returns (bool) {
bytes32 chunk = _finalized[niftyType / 256];
return (chunk & bytes32(1 << (niftyType % 256))) != 0x0;
}
/**
* @dev Prevent the minting of additional NFTs of this 'niftyType'.
*/
function setFinalized(uint256 niftyType) public onlyValidSender {
uint256 quotient = niftyType / 256;
bytes32 chunk = _finalized[quotient];
_finalized[quotient] = chunk | bytes32(1 << (niftyType % 256));
}
/**
* @dev The artist of this collection.
*/
function creator() public view virtual returns (string memory) {
return _creator;
}
/**
* @dev Assign the root location where the artifact assets are stored.
*/
function setBaseURI(string memory baseURI) public onlyValidSender {
_setBaseURI(baseURI);
}
/**
* @dev Allow owner to change nifty name, by 'niftyType'.
*/
function setNiftyName(uint256 niftyType, string memory niftyName) public onlyValidSender {
_setNiftyTypeName(niftyType, niftyName);
}
/**
* @dev Assign the IPFS hash of canonical artifcat file, by 'niftyType'.
*/
function setNiftyIPFSHash(uint256 niftyType, string memory hashIPFS) public onlyValidSender {
_setTokenIPFSHashNiftyType(niftyType, hashIPFS);
}
/**
* @dev Create specified number of nifties en masse.
* Once an NFT collection is spawned by the factory contract, we make calls to set the IPFS
* hash (above) for each Nifty type in the collection.
* Subsequently calls are issued to this function to mint the appropriate number of tokens
* for the project.
*/
function mintNifty(uint256 niftyType, uint256 count) public onlyValidSender {
require(!_getFinalized(niftyType), "NiftyBuilderInstance: minting concluded for nifty type");
uint256 tokenNumber = _mintCount[niftyType] + 1;
uint256 tokenId00 = _encodeTokenId(niftyType, tokenNumber);
uint256 tokenId01 = tokenId00 + count - 1;
for (uint256 tokenId = tokenId00; tokenId <= tokenId01; tokenId++) {
_owners[tokenId] = _defaultOwner;
}
_mintCount[niftyType] += count;
_balances[_defaultOwner] += count;
emit ConsecutiveTransfer(tokenId00, tokenId01, address(0), _defaultOwner);
}
}
// File: contracts/core/BuilderShop.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;
/**
* ::::::::::::::::::::::::::::::::::::::::::::
* ::::::::::::::::::::::::::::::::::::::::::::::::
* ::::::::::::::::::::::::::::::::::::::::::::::::
* ::::::::::::NNNNNNNNN:::::::NNNNNNNN::::::::::::
* ::::::::::::NNNNNNNNNN::::::NNNNNNNN::::::::::::
* ::::::::::::NNNNNNNNNNN:::::NNNNNNNN::::::::::::
* ::::::::::::NNNNNNNNNNNN::::NNNNNNNN::::::::::::
* ::::::::::::NNNNNNNNNNNNN:::NNNNNNNN::::::::::::
* ::::::::::::NNNNNNNNNNNNNN::NNNNNNNN::::::::::::
* ::::::::::::NNNNNNNN:NNNNNN:NNNNNNNN::::::::::::
* ::::::::::::NNNNNNNN::NNNNNNNNNNNNNN::::::::::::
* ::::::::::::NNNNNNNN:::NNNNNNNNNNNNN::::::::::::
* ::::::::::::NNNNNNNN::::NNNNNNNNNNNN::::::::::::
* ::::::::::::NNNNNNNN:::::NNNNNNNNNNN::::::::::::
* ::::::::::::NNNNNNNN::::::NNNNNNNNNN::::::::::::
* ::::::::::::NNNNNNNN:::::::NNNNNNNNN::::::::::::
* ::::::::::::::::::::::::::::::::::::::::::::::::
* ::::::::::::::::::::::::::::::::::::::::::::::::
* ::::::::::::::::::::::::::::::::::::::::::::
*
* @dev Nexus of the Nifty Gateway smartcontract constellation.
* {BuilderShop} is a factory contract, when a new collection
* is slated for deployment, a call is made to this factory
* contract to create it.
*/
contract BuilderShop is NiftyEntity {
/**
* @dev Tracks the latest {NiftyBuilderInstance} deployment, supplied as constructor
* argument. Every time a new contract is deployed from this "master" factory contract,
* it is given a contract id that is one higher than the previous contract deployed.
*/
uint public _id;
// Provided as a argument to {NiftyBuilderInstance} deployment.
address public _defaultOwner;
// Reference for validation of posible {NiftyBuilderInstance} by address.
mapping (address => bool) public validBuilderInstance;
// Log the creation of each {NiftyBuilderInstance} deployment.
event BuilderInstanceCreated(address instanceAddress, uint id);
/**
* @param niftyRegistryContract Points to the mainnet repository of addresses
* allowed to invoke state mutating operations via the modifier 'onlyValidSender'.
* @param defaultOwner_ The address to which all tokens are initially minted.
*/
constructor(address niftyRegistryContract,
address defaultOwner_) NiftyEntity(niftyRegistryContract) {
_defaultOwner = defaultOwner_;
}
/**
* @dev Configurable address for defaultOwner.
* @param defaultOwner account to which newly minted tokens are allocated.
*/
function setDefaultOwner(address defaultOwner) onlyValidSender external {
_defaultOwner = defaultOwner;
}
/**
* @dev Allow anyone to check if a contract address is a valid nifty gateway contract.
* @param instanceAddress address of potential spawned {NiftyBuilderInstance}.
* @return bool whether or not the contract was initialized by this {BuilderShop}.
*/
function isValidBuilderInstance(address instanceAddress) external view returns (bool) {
return (validBuilderInstance[instanceAddress]);
}
/**
* @dev Collections on the platform are associated with a call to this
* function which will generate a {NiftyBuilderInstance} to house the
* NFTs for that particular artist release.
*
* @param name Of the collection being deployed.
* @param symbol Shorthand token identifier, for wallets, etc.
* @param typeCount The number of different Nifty types (different
* individual NFTs) associated with the deployed collection.
* @param baseURI The location where the artifact assets are stored.
* @param creator The artist associated with the collection.
*/
function createNewBuilderInstance(
string memory name,
string memory symbol,
uint256 typeCount,
string memory baseURI,
string memory creator) external onlyValidSender {
_id += 1;
NiftyBuilderInstance instance = new NiftyBuilderInstance(
name,
symbol,
_id,
typeCount,
baseURI,
creator,
niftyRegistryContract,
_defaultOwner
);
address instanceAddress = address(instance);
validBuilderInstance[instanceAddress] = true;
emit BuilderInstanceCreated(instanceAddress, _id);
}
}