Contract Source Code:
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.9;
import '@openzeppelin/contracts/access/Ownable.sol';
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import './ERC1155U.sol';
interface ProxyRegistry {
function proxies(address) external view returns (address);
}
interface IERC2981 {
function royaltyInfo(uint256 _tokenId, uint256 _salePrice)
external
view
returns (address receiver, uint256 royaltyAmount);
}
contract Quasars is ERC1155U, IERC2981, Ownable {
uint256 _currentTokenId = 1;
uint256 constant MAX_TOKENS = 10_000;
uint256 constant PRICE_WHEN_MINTING_SEVERAL_AT_A_TIME = 0.01 ether;
string private _uri = 'https://codemakes.art/token/quasars/{id}';
bool private _gaslessTrading = true;
uint256 private _royaltyPartsPerMillion = 50_000;
string public constant name = 'Quasars';
string public constant symbol = 'QSR';
function mint_One_4d() external {
require(_currentTokenId <= MAX_TOKENS, 'Sold out');
uint96 dna = uint96(uint256(keccak256(abi.encode(msg.sender, _currentTokenId, block.timestamp))));
_mint(msg.sender, _currentTokenId, dna, '');
unchecked {
// Can't overflow
_currentTokenId++;
}
}
function gift_One_bca(address to) external {
require(_currentTokenId <= MAX_TOKENS, 'Sold out');
// NOTE: dna still derived from sender
uint96 dna = uint96(uint256(keccak256(abi.encode(msg.sender, _currentTokenId, block.timestamp))));
_mint(to, _currentTokenId, dna, '');
unchecked {
// Can't overflow
_currentTokenId++;
}
}
function mint_Several_nmW(uint256 count) external payable {
require(count < 21, 'Max 20');
unchecked {
// Can't overflow
require(_currentTokenId + count < MAX_TOKENS, 'Sold out');
require(count * PRICE_WHEN_MINTING_SEVERAL_AT_A_TIME == msg.value, 'Wrong price');
}
uint256[] memory ids = new uint256[](count);
uint96[] memory dnas = new uint96[](count);
for (uint256 i = 0; i < count; ) {
ids[i] = _currentTokenId + i;
dnas[i] = uint96(uint256(keccak256(abi.encode(msg.sender, i, block.timestamp))));
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
i++;
}
}
_batchMint(msg.sender, ids, dnas, '');
unchecked {
// Can't overflow
_currentTokenId += count;
}
}
function totalSupply() public view returns (uint256) {
unchecked {
// Starts with 1
return _currentTokenId - 1;
}
}
function uri(uint256) public view override returns (string memory) {
return _uri;
}
function supportsInterface(bytes4 interfaceId) public pure virtual override returns (bool) {
return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
}
function royaltyInfo(uint256, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount) {
receiver = owner();
royaltyAmount = (salePrice * _royaltyPartsPerMillion) / 1_000_000;
}
function isApprovedForAll(address owner, address operator) public view override returns (bool) {
// Allow easier listing for sale on OpenSea. Based on
// https://github.com/ProjectOpenSea/opensea-creatures/blob/f7257a043e82fae8251eec2bdde37a44fee474c4/migrations/2_deploy_contracts.js#L29
if (_gaslessTrading) {
if (block.chainid == 4) {
if (ProxyRegistry(0xF57B2c51dED3A29e6891aba85459d600256Cf317).proxies(owner) == operator) {
return true;
}
} else if (block.chainid == 1) {
if (ProxyRegistry(0xa5409ec958C83C3f309868babACA7c86DCB077c1).proxies(owner) == operator) {
return true;
}
}
}
return super.isApprovedForAll(owner, operator);
}
// Admin
function setUri(string calldata newUri) public onlyOwner {
_uri = newUri;
}
function setAllowGaslessListing(bool allow) public onlyOwner {
_gaslessTrading = allow;
}
function setRoyaltyPPM(uint256 newValue) public onlyOwner {
require(newValue < 1_000_000, 'Must be < 1e6');
_royaltyPartsPerMillion = newValue;
}
function thankYouForSupportingUs_o4k() public payable onlyOwner {
require(payable(msg.sender).send(address(this).balance));
}
function thankYouForSupportingUsERC20_V1M(IERC20 erc20Token) public onlyOwner {
erc20Token.transfer(msg.sender, erc20Token.balanceOf(address(this)));
}
}
// 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 Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Minimalist and gas efficient standard ERC1155 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC1155.sol)
abstract contract ERC1155U {
/*///////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event TransferSingle(
address indexed operator,
address indexed from,
address indexed to,
uint256 id,
uint256 amount
);
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] amounts
);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
event URI(string value, uint256 indexed id);
/*///////////////////////////////////////////////////////////////
ERC1155 STORAGE
//////////////////////////////////////////////////////////////*/
uint256[10001] private _attrs;
mapping(address => mapping(address => bool)) private _isApprovedForAll;
/*///////////////////////////////////////////////////////////////
METADATA LOGIC
//////////////////////////////////////////////////////////////*/
function uri(uint256 id) public view virtual returns (string memory);
/*///////////////////////////////////////////////////////////////
Ownership & Data
//////////////////////////////////////////////////////////////*/
function ownerOf(uint256 id) public view returns (address) {
return address(uint160(_attrs[id] & 0x00ffffffffffffffffffffffffffffffffffffffff));
}
function dnaOf(uint256 id) public view returns (uint96) {
return uint96(_attrs[id] >> 160);
}
function _setOwner(uint256 id, address to) private {
_attrs[id] = (_attrs[id] & (0xffffffffffffffffffffffff << 160)) | uint160(to);
}
/*///////////////////////////////////////////////////////////////
ERC1155 LOGIC
//////////////////////////////////////////////////////////////*/
function isApprovedForAll(address owner, address operator) public view virtual returns (bool) {
return _isApprovedForAll[owner][operator];
}
function setApprovalForAll(address operator, bool approved) public virtual {
_isApprovedForAll[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes memory data
) public virtual {
require(msg.sender == from || isApprovedForAll(from, msg.sender), 'NOT_AUTHORIZED');
require(amount == 1, 'Can only transfer one');
require(ownerOf(id) == from, 'Not owner');
_setOwner(id, to);
emit TransferSingle(msg.sender, from, to, id, amount);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155Received(msg.sender, from, id, amount, data) ==
ERC1155TokenReceiver.onERC1155Received.selector,
'UNSAFE_RECIPIENT'
);
}
function safeBatchTransferFrom(
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) public virtual {
uint256 idsLength = ids.length; // Saves MLOADs.
require(idsLength == amounts.length, 'LENGTH_MISMATCH');
require(msg.sender == from || isApprovedForAll(from, msg.sender), 'NOT_AUTHORIZED');
for (uint256 i = 0; i < idsLength; ) {
uint256 id = ids[i];
uint256 amount = amounts[i];
require(amount == 1, 'Can only transfer one');
require(ownerOf(id) == from, 'Not owner');
_setOwner(id, to);
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
i++;
}
}
emit TransferBatch(msg.sender, from, to, ids, amounts);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155BatchReceived(msg.sender, from, ids, amounts, data) ==
ERC1155TokenReceiver.onERC1155BatchReceived.selector,
'UNSAFE_RECIPIENT'
);
}
function balanceOf(address owner, uint256 id) public view virtual returns (uint256 balance) {
if (ownerOf(id) == owner) {
balance = 1;
}
}
function balanceOfBatch(address[] memory owners, uint256[] memory ids)
public
view
virtual
returns (uint256[] memory balances)
{
uint256 ownersLength = owners.length; // Saves MLOADs.
require(ownersLength == ids.length, 'LENGTH_MISMATCH');
balances = new uint256[](owners.length);
// Unchecked because the only math done is incrementing
// the array index counter which cannot possibly overflow.
unchecked {
for (uint256 i = 0; i < ownersLength; i++) {
balances[i] = balanceOf(owners[i], ids[i]);
}
}
}
/*///////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
function supportsInterface(bytes4 interfaceId) public pure virtual returns (bool) {
return
interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
interfaceId == 0xd9b67a26 || // ERC165 Interface ID for ERC1155
interfaceId == 0x0e89341c; // ERC165 Interface ID for ERC1155MetadataURI
}
/*///////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(
address to,
uint256 id,
uint96 dna,
bytes memory data
) internal {
require(_attrs[id] == 0, 'Already minted');
_attrs[id] = (uint256(dna) << 160) | uint160(to);
emit TransferSingle(msg.sender, address(0), to, id, 1);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155Received(msg.sender, address(0), id, 1, data) ==
ERC1155TokenReceiver.onERC1155Received.selector,
'UNSAFE_RECIPIENT'
);
}
function _batchMint(
address to,
uint256[] memory ids,
uint96[] memory dnas,
bytes memory data
) internal {
uint256 idsLength = ids.length; // Saves MLOADs.
uint256[] memory amounts = new uint256[](idsLength);
for (uint256 i = 0; i < idsLength; ) {
uint256 id = ids[i];
uint96 dna = dnas[i];
require(_attrs[id] == 0, 'Already minted');
_attrs[id] = (uint256(dna) << 160) | uint160(to);
amounts[i] = 1;
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
i++;
}
}
emit TransferBatch(msg.sender, address(0), to, ids, amounts);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155BatchReceived(msg.sender, address(0), ids, amounts, data) ==
ERC1155TokenReceiver.onERC1155BatchReceived.selector,
'UNSAFE_RECIPIENT'
);
}
}
/// @notice A generic interface for a contract which properly accepts ERC1155 tokens.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC1155.sol)
interface ERC1155TokenReceiver {
function onERC1155Received(
address operator,
address from,
uint256 id,
uint256 amount,
bytes calldata data
) external returns (bytes4);
function onERC1155BatchReceived(
address operator,
address from,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) external returns (bytes4);
}
// 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;
}
}