Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@1001-digital/erc721-extensions/contracts/WithContractMetaData.sol";
import "@1001-digital/erc721-extensions/contracts/RandomlyAssigned.sol";
import "@1001-digital/erc721-extensions/contracts/WithIPFSMetaData.sol";
import "@1001-digital/erc721-extensions/contracts/WithWithdrawals.sol";
import "@1001-digital/erc721-extensions/contracts/WithSaleStart.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./CryptoPunkInterface.sol";
import "./OneDayPunk.sol";
import "./WithMarketOffers.sol";
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contract PunkScape is
ERC721,
Ownable,
WithSaleStart,
WithWithdrawals,
WithIPFSMetaData,
RandomlyAssigned,
WithMarketOffers,
WithContractMetaData
{
uint256 public price = 0.03 ether;
string constant public provenanceHash = "Qme5GyE2rUHeSSHPeXdvGBAqQdLxzE31J1HTP6aJPJcGgA";
bool public frozen = false;
address private cryptoPunksAddress;
address private oneDayPunkAddress;
/// Stores the PunkScape that was claimed during
/// early access for each OneDayPunk.
mapping(uint256 => uint256) public oneDayPunkToPunkScape;
/// Instantiate the PunkScape Contract
constructor(
address payable _punkscape,
string memory _cid,
uint256 _saleStart,
string memory _contractMetaDataURI,
address _cryptoPunksAddress,
address _oneDayPunkAddress
)
ERC721("PunkScape", "PS")
WithIPFSMetaData(_cid)
WithMarketOffers(_punkscape, 500)
WithSaleStart(_saleStart)
RandomlyAssigned(10000, 1)
WithContractMetaData(_contractMetaDataURI)
{
cryptoPunksAddress = _cryptoPunksAddress;
oneDayPunkAddress = _oneDayPunkAddress;
}
/// Claim a PunkScape for a given OneDayPunk during early access.
/// The scape will be sent to the owner of the OneDayPunk.
function claimForOneDayPunk(uint256 oneDayPunkId) external payable
afterSaleStart
ensureAvailability
{
OneDayPunk oneDayPunk = OneDayPunk(oneDayPunkAddress);
address owner = oneDayPunk.ownerOf(oneDayPunkId);
require(
msg.value >= price,
"Pay up, friend"
);
require(
oneDayPunkToPunkScape[oneDayPunkId] == 0,
"PunkScape for this OneDayPunk has already been claimed"
);
// Get the token ID
uint256 newScape = nextToken();
// Redeem the PunkScape for the given OneDayPunk
oneDayPunkToPunkScape[oneDayPunkId] = newScape;
// Mint the token
_safeMint(owner, newScape);
}
/// General claiming phase starts 618 minutes after OneDayPunk sale start. Why?
/// Because that's the amount of time it took for all OneDayPunks to sell out.
function claimAfter618Minutes(uint256 amount) external payable
ensureAvailabilityFor(amount)
{
uint256 _saleStart = saleStart();
// General claiming only available 618 minutes after sale start.
require(
block.timestamp > (_saleStart + 618 * 60),
"General claiming phase starts 618 minutes after sale start"
);
// Can mint up to three PunkScapes per transaction.
require(
amount > 0,
"Have to mint at least one PunkScape"
);
require(
amount <= 3,
"Can't mint more than 3 PunkScapes per transaction"
);
require(
msg.value >= (price * amount),
"Pay up, friend"
);
// Within the first 24 hours only OneDayPunk / CryptoPunk holders can mint.
if (block.timestamp < (_saleStart + 24 * 60 * 60)) {
CryptoPunks cryptoPunks = CryptoPunks(cryptoPunksAddress);
OneDayPunk oneDayPunk = OneDayPunk(oneDayPunkAddress);
require(
oneDayPunk.balanceOf(msg.sender) == 1 ||
cryptoPunks.balanceOf(msg.sender) >= 1,
"You have to own a CryptoPunk or a OneDayPunk to mint a PunkScape"
);
}
// Mint the new tokens
for (uint256 index = 0; index < amount; index++) {
uint256 newScape = nextToken();
_safeMint(msg.sender, newScape);
}
}
/// Allow the contract owner to update the IPFS content identifier until sale starts.
function setCID(string memory _cid) external onlyOwner {
require(frozen == false, "Metadata is frozen");
_setCID(_cid);
}
/// Allow the contract owner to freeze the metadata.
function freezeCID() external onlyOwner {
frozen = true;
}
/// Get the tokenURI for a specific token
function tokenURI(uint256 tokenId)
public view override(WithIPFSMetaData, ERC721)
returns (string memory)
{
return WithIPFSMetaData.tokenURI(tokenId);
}
/// Configure the baseURI for the tokenURI method
function _baseURI()
internal view override(WithIPFSMetaData, ERC721)
returns (string memory)
{
return WithIPFSMetaData._baseURI();
}
/// We support the `HasSecondarySalesFees` interface
function supportsInterface(bytes4 interfaceId)
public view override(WithMarketOffers, ERC721)
returns (bool)
{
return WithMarketOffers.supportsInterface(interfaceId);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
/// @author 1001.digital
/// @title Link to your collection's contract meta data right from within your smart contract.
abstract contract WithContractMetaData is Ownable {
// The URI to the contract meta data.
string private _contractURI;
/// Instanciate the contract
/// @param uri the URL to the contract metadata
constructor (string memory uri) {
_contractURI = uri;
}
/// Set the contract metadata URI
/// @param uri the URI to set
/// @dev the contract metadata should link to a metadata JSON file.
function setContractURI(string memory uri) public virtual onlyOwner {
_contractURI = uri;
}
/// Expose the contractURI
/// @return the contract metadata URI.
function contractURI() public view virtual returns (string memory) {
return _contractURI;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./WithLimitedSupply.sol";
/// @author 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 startFrom;
/// Instanciate the contract
/// @param _totalSupply how many tokens this collection should hold
/// @param _startFrom the tokenID with which to start counting
constructor (uint256 _totalSupply, uint256 _startFrom)
WithLimitedSupply(_totalSupply)
{
startFrom = _startFrom;
}
/// 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 ensureAvailability returns (uint256) {
uint256 maxIndex = totalSupply() - 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
super.nextToken();
return value + startFrom;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
/// @author 1001.digital
/// @title Handle NFT Metadata stored on IPFS
abstract contract WithIPFSMetaData is ERC721 {
using Strings for uint256;
/// @dev The content identifier of the folder containing all JSON files.
string public cid;
/// Instantiate the contract
/// @param _cid the content identifier for the token metadata.
/// @dev be careful & make sure your metadata is correct - you can't change this
constructor (string memory _cid) {
_setCID(_cid);
}
/// Get the tokenURI for a tokenID
/// @param tokenId the token id for which to get the matadata URL
/// @dev links to the metadata json file on IPFS.
/// @return the URL to the token metadata file
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
// We don't check whether the _baseURI is set like in the OpenZeppelin implementation
// as we're deploying the contract with the CID.
return string(abi.encodePacked(
_baseURI(), "/", tokenId.toString(), "/metadata.json"
));
}
/// Configure the baseURI for the tokenURI method.
/// @dev override the standard OpenZeppelin implementation
/// @return the IPFS base uri
function _baseURI() internal view virtual override returns (string memory) {
return string(abi.encodePacked("ipfs://", cid));
}
/// Set the content identifier for this collection.
/// @param _cid the new content identifier
/// @dev update the content identifier for this nft.
function _setCID(string memory _cid) internal virtual {
cid = _cid;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
/// @author 1001.digital
/// @title An extension that enables the contract owner to withdraw funds stored in the contract.
abstract contract WithWithdrawals is Ownable
{
/// Withdraws the ETH stored in the contract.
/// @dev only the owner can withdraw funds.
function withdraw() onlyOwner public {
payable(owner()).transfer(address(this).balance);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
/// @author 1001.digital
/// @title An extension that enables the contract owner to set and update the date of a public sale.
abstract contract WithSaleStart is Ownable
{
// Stores the sale start time
uint256 private _saleStart;
/// @dev Emitted when the sale start date changes
event SaleStartChanged(uint256 time);
/// @dev Initialize with a given timestamp when to start the sale
constructor (uint256 time) {
_saleStart = time;
}
/// @dev Sets the start of the sale. Only owners can do so.
function setSaleStart(uint256 time) public virtual onlyOwner beforeSaleStart {
_saleStart = time;
emit SaleStartChanged(time);
}
/// @dev Returns the start of the sale in seconds since the Unix Epoch
function saleStart() public view virtual returns (uint256) {
return _saleStart;
}
/// @dev Returns true if the sale has started
function saleStarted() public view virtual returns (bool) {
return _saleStart <= block.timestamp;
}
/// @dev Modifier to make a function callable only after sale start
modifier afterSaleStart() {
require(saleStarted(), "Sale hasn't started yet");
_;
}
/// @dev Modifier to make a function callable only before sale start
modifier beforeSaleStart() {
require(! saleStarted(), "Sale has already started");
_;
}
}
// 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;
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;
interface CryptoPunks {
function balanceOf(address owner) external view returns(uint256);
function punkIndexToAddress(uint index) external view returns(address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@1001-digital/erc721-extensions/contracts/RandomlyAssigned.sol";
import "@1001-digital/erc721-extensions/contracts/WithContractMetaData.sol";
import "@1001-digital/erc721-extensions/contracts/WithIPFSMetaData.sol";
import "@1001-digital/erc721-extensions/contracts/OnePerWallet.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "./CryptoPunkInterface.sol";
// ====================================================================================================================== //
// ______ __ __ ______ _____ ______ __ __ ______ __ __ __ __ __ __ //
// /\ __ \ /\ "-.\ \ /\ ___\ /\ __-. /\ __ \ /\ \_\ \ /\ == \ /\ \/\ \ /\ "-.\ \ /\ \/ / //
// \ \ \/\ \ \ \ \-. \ \ \ __\ \ \ \/\ \ \ \ __ \ \ \____ \ \ \ _-/ \ \ \_\ \ \ \ \-. \ \ \ _"-. //
// \ \_____\ \ \_\\"\_\ \ \_____\ \ \____- \ \_\ \_\ \/\_____\ \ \_\ \ \_____\ \ \_\\"\_\ \ \_\ \_\ //
// \/_____/ \/_/ \/_/ \/_____/ \/____/ \/_/\/_/ \/_____/ \/_/ \/_____/ \/_/ \/_/ \/_/\/_/ //
// //
// ====================================================================================================================== //
// 10k "ONE DAY I'LL BE A PUNK"-punks //
// limited to one per address //
// aim high, fren! //
// ====================================================================================================================== //
contract OneDayPunk is
ERC721,
OnePerWallet,
RandomlyAssigned,
WithIPFSMetaData,
WithContractMetaData
{
address private cryptoPunksAddress;
// Instantiate the OneDayPunk Contract
constructor(
string memory _cid,
string memory _contractMetaDataURI,
address _cryptopunksAddress
)
ERC721("OneDayPunk", "ODP")
RandomlyAssigned(10000, 0)
WithIPFSMetaData(_cid)
WithContractMetaData(_contractMetaDataURI)
{
cryptoPunksAddress = _cryptopunksAddress;
}
// Claim a "One Day I'll Be A Punk"-Punk
function claim() external {
_claim(msg.sender);
}
// Claim a "One Day I'll Be A Punk"-Punk to a specific address
function claimFor(address to) external {
_claim(to);
}
// Claims a token for a specific address.
function _claim (address to) internal ensureAvailability onePerWallet(to) {
CryptoPunks cryptopunks = CryptoPunks(cryptoPunksAddress);
require(cryptopunks.balanceOf(to) == 0, "You lucky one already have a CryptoPunk.");
uint256 next = nextToken();
_safeMint(to, next);
}
// Get the tokenURI for a specific token
function tokenURI(uint256 tokenId)
public view override(WithIPFSMetaData, ERC721)
returns (string memory)
{
return WithIPFSMetaData.tokenURI(tokenId);
}
// Configure the baseURI for the tokenURI method.
function _baseURI()
internal view override(WithIPFSMetaData, ERC721)
returns (string memory)
{
return WithIPFSMetaData._baseURI();
}
// Mark OnePerWallet implementation as override for ERC721, OnePerWallet
function _mint(address to, uint256 tokenId) internal override(ERC721, OnePerWallet) {
OnePerWallet._mint(to, tokenId);
}
// Mark OnePerWallet implementation as override for ERC721, OnePerWallet
function _transfer(address from, address to, uint256 tokenId) internal override(ERC721, OnePerWallet) {
OnePerWallet._transfer(from, to, tokenId);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@1001-digital/erc721-extensions/contracts/WithFees.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
/// @author 1001.digital
/// @title Implement a basic integrated marketplace with fees
abstract contract WithMarketOffers is ERC721, WithFees {
event OfferCreated(uint256 indexed tokenId, uint256 indexed value, address indexed to);
event OfferWithdrawn(uint256 indexed tokenId);
event Sale(uint256 indexed tokenId, address indexed from, address indexed to, uint256 value);
struct Offer {
uint256 price;
address payable specificBuyer;
}
/// @dev All active offers
mapping (uint256 => Offer) private _offers;
/// Instantiate the contract
/// @param _feeRecipient the fee recipient for secondary sales
/// @param _bps the basis points measure for the fees
constructor (address payable _feeRecipient, uint256 _bps)
WithFees(_feeRecipient, _bps)
{}
/// @dev All active offers
function offerFor(uint256 tokenId) external view returns(Offer memory) {
require(_offers[tokenId].price > 0, "No active offer for this item");
return _offers[tokenId];
}
function _makeOffer(uint256 tokenId, uint256 price, address to) internal {
require(_isApprovedOrOwner(_msgSender(), tokenId), "Caller is neither owner nor approved");
require(price > 0, "Price should be higher than 0");
require(price > _offers[tokenId].price, "Price should be higher than existing offer");
_offers[tokenId] = Offer(price, payable(to));
emit OfferCreated(tokenId, price, to);
}
/// @dev Make a new offer
function makeOffer(uint256 tokenId, uint256 price) external {
_makeOffer(tokenId, price, address(0));
}
/// @dev Make a new offer to a specific person
function makeOfferTo(uint256 tokenId, uint256 price, address to) external {
_makeOffer(tokenId, price, to);
}
/// @dev Revoke an active offer
function cancelOffer(uint256 tokenId) external {
require(_isApprovedOrOwner(_msgSender(), tokenId), "Caller is neither owner nor approved");
delete _offers[tokenId];
emit OfferWithdrawn(tokenId);
}
/// @dev Buy an item that is for offer
function buy(uint256 tokenId) external payable isForSale(tokenId) {
Offer memory offer = _offers[tokenId];
address payable seller = payable(ownerOf(tokenId));
// If it is a private sale, make sure the buyer is the private sale recipient.
if (offer.specificBuyer != address(0)) {
require(offer.specificBuyer == msg.sender, "Can't buy a privately offered item");
}
require(msg.value >= offer.price, "Price not met");
// Seller gets msg value - fees set as BPS.
seller.transfer(msg.value - (offer.price * bps / 10000));
// We transfer the token.
_safeTransfer(seller, msg.sender, tokenId, "");
emit Sale(tokenId, seller, msg.sender, offer.price);
delete _offers[tokenId];
}
/// @dev Check whether the token is for sale
modifier isForSale(uint256 tokenId) {
require(_offers[tokenId].price > 0, "Item not for sale");
_;
}
/// We support the `HasSecondarySalesFees` interface
function supportsInterface(bytes4 interfaceId)
public view virtual override(WithFees, ERC721)
returns (bool)
{
return WithFees.supportsInterface(interfaceId);
}
}
// 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 "@openzeppelin/contracts/utils/Counters.sol";
/// @author 1001.digital
/// @title A token tracker that limits the token supply and increments token IDs on each new mint.
abstract contract WithLimitedSupply {
using Counters for Counters.Counter;
// Keeps track of how many we have minted
Counters.Counter private _tokenCount;
/// @dev The maximum count of tokens this token tracker will hold.
uint256 private _totalSupply;
/// Instanciate the contract
/// @param totalSupply_ how many tokens this collection should hold
constructor (uint256 totalSupply_) {
_totalSupply = totalSupply_;
}
/// @dev Get the max Supply
/// @return the maximum token count
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
/// @dev Get the current token count
/// @return the created token count
function tokenCount() public view returns (uint256) {
return _tokenCount.current();
}
/// @dev Check whether tokens are still available
/// @return the available token count
function availableTokenCount() public view returns (uint256) {
return totalSupply() - tokenCount();
}
/// @dev Increment the token count and fetch the latest count
/// @return the next token id
function nextToken() internal virtual ensureAvailability returns (uint256) {
uint256 token = _tokenCount.current();
_tokenCount.increment();
return token;
}
/// @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");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// 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;
/**
* @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;
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 "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@1001-digital/check-address/contracts/CheckAddress.sol";
/// @author 1001.digital
/// @title An extension that enables checking that an address only holds one token.
abstract contract OnePerWallet is ERC721 {
// Mapping owner address to token
mapping (address => uint256) private _ownedToken;
/// Require an externally owned account to only hold one token.
/// @param wallet the address to check
/// @dev Only allow one token per wallet
modifier onePerWallet(address wallet) {
if (CheckAddress.isExternal(wallet)) {
require(_ownedToken[wallet] == 0, "Can only hold one token per wallet");
}
_;
}
/// Require any account on the network to only hold one token.
/// @param account the address to checkk
/// @dev Only allow one token per account
modifier onePerAccount(address account) {
require(
msg.sender == tx.origin &&
_ownedToken[account] == 0,
"Can only hold one token per account"
);
_;
}
/// Query the owner of a token.
/// @param owner the address of the owner
/// @dev Get the the token of an owner
function tokenOf(address owner) public view virtual returns (uint256) {
require(_ownedToken[owner] > 0, "No token for this account.");
// We subtract 1 as we added 1 to account for 0-index based collections
return _ownedToken[owner] - 1;
}
/// Store `_ownedToken` instead of `_balances`.
/// @param to the address to which to mint the token
/// @param tokenId the tokenId that should be minted
/// @dev overrides the OpenZeppelin `_mint` method to accomodate for our own balance tracker
function _mint(address to, uint256 tokenId) internal virtual override onePerWallet(to) {
super._mint(to, tokenId);
// We add one to account for 0-index based collections
_ownedToken[to] = tokenId + 1;
}
/// Track transfers in `_ownedToken` instead of `_balances`
/// @param from the address from which to transfer the token
/// @param to the address to which to transfer the token
/// @param tokenId the tokenId that is being transferred
/// @dev overrides the OpenZeppelin `_transfer` method to accomodate for our own balance tracker
function _transfer(address from, address to, uint256 tokenId) internal virtual override onePerWallet(to) {
super._transfer(from, to, tokenId);
_ownedToken[from] = 0;
// We add one to account for 0-index based collections
_ownedToken[to] = tokenId + 1;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/// @author 1001.digital
/// @title A helper to distinguish external and contract addresses
library CheckAddress {
/// Check whether an address is a smart contract.
/// @param account the address to check
/// @dev checks if the `extcodesize` of `address` is greater zero
/// @return true for contracts
function isContract(address account) external view returns (bool) {
return getSize(account) > 0;
}
/// Check whether an address is an external wallet.
/// @param account the address to check
/// @dev checks if the `extcodesize` of `address` is zero
/// @return true for external wallets
function isExternal(address account) external view returns (bool) {
return getSize(account) == 0;
}
/// Get the size of the code of an address
/// @param account the address to check
/// @dev gets the `extcodesize` of `address`
/// @return the size of the address
function getSize(address account) internal view returns (uint256) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "./standards/HasSecondarySaleFees.sol";
/// @author 1001.digital
/// @title Implements the various fee standards that are floating around.
/// @dev We need a proper standard for this.
abstract contract WithFees is ERC721, HasSecondarySaleFees {
// The address to pay fees to
address payable internal beneficiary;
// The fee basis points
uint256 internal bps;
/// Instanciate the contract
/// @param _beneficiary the address to send fees to
/// @param _bps the basis points measure for the fees
constructor (address payable _beneficiary, uint256 _bps) {
beneficiary = _beneficiary;
bps = _bps;
}
/// Implement the `HasSecondarySalesFees` Contract
/// @dev implements the standard pushed by Rarible
/// @return list of fee recipients, in our case always one
function getFeeRecipients(uint256) public view override returns (address payable[] memory) {
address payable[] memory recipients = new address payable[](1);
recipients[0] = beneficiary;
return recipients;
}
/// Implement the `HasSecondarySalesFees` Contract
/// @dev implements the standard pushed by Rarible
/// @return list of fee basis points, in our case always one
function getFeeBps(uint256) public view override returns (uint256[] memory) {
uint256[] memory bpsArray = new uint256[](1);
bpsArray[0] = bps;
return bpsArray;
}
/// Make sure the contract reports that it supportsthe `HasSecondarySalesFees` Interface
/// @param interfaceId the interface to check
/// @dev extends the ERC721 method
/// @return whether the given interface is supported
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721, ERC165) returns (bool) {
return interfaceId == type(HasSecondarySaleFees).interfaceId
|| ERC721.supportsInterface(interfaceId);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
abstract contract HasSecondarySaleFees is ERC165 {
function getFeeRecipients(uint256 id) public view virtual returns (address payable[] memory);
function getFeeBps(uint256 id) public view virtual returns (uint256[] memory);
}