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OpenSeaOverview
Max Total Supply
1,500 ZXG
Holders
446
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
4 ZXGLoading...
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| # | Exchange | Pair | Price | 24H Volume | % Volume |
|---|
Contract Name:
ZeroXGakuen
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
Yes with 1000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "@openzeppelin/contracts/interfaces/IERC2981.sol";
import "./ERC721ASGakuen.sol";
//
//
// [Note from Dev]
// PRAISE THE KAORI-CHAN!!!!!
//
// .::-----:::.
// :=+#%%%@@@@@%%%#####*+=-.
// .-===-=#@@@@@@@@@@@%%###########***=-.
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// :*@@@@@%%@@@@@@@@@@@@@@@#%@@%##########**#@%#########%#*:
// *@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%############%@%########%##=
// -@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%%%%%@@%%####%@%#%#####%##=
// +@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@%@#*%@@@%%%%%@@%%%%##@###+
// .+@@@@@@@@@@@@@@@@@@@@@#*@@@@@@@@@@@@@@@@@@@#*@@@@@%%%%@@@%%%%%@%%#+
// =%*@@@@@@@@@@@@@@@@@@@@+:#@@@@@@@@@@@@@@@@@@@@#*@@@@@@@%%@@@@@%%@%%%%-
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// - +*#%@@@@@@@@@@@@@@@@@+ %@@@@@@@@@@@@@@@@%=-=+*%#:*@@@@@@%@@@@@@@@@@@%.
// .:.-*#%@@@@@@*@@@@@@@@@* #@*+@@@@@%@@@@@@@@@@@%#-=%%#%@@@@@@@@@@@@@@@@@+
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// := :@*@@@@@@@@@+@@*-@* .#@@@@@@@@@@@@@@@@@#%@@@@@%=#+.*@@@%@@@@**@@@@@-
// .: +@%%@@@@@@@=-@@:-@: -@%@@@@@@*@@@@@@@@@@#===+*#:=%@@@@#@@@%::@@@@@+
// . +@@@@@@@@@=. =+ * .=**@@%@@#*@@@@@@@@@@@@@%*:#%#%%@@+#@@+-.#@@@@*
// ...-#@@@@@@@%.:. . .--:*#+%@-:*@@@@@@@@@@@+-@@@@@%+#=+@%=++*@@@@#
// .. :*@@@@@@#@@##%+: . :=. .=*%@@@@@*=#%@@@@@#@@-#@%####@@@@%
// .. ..=#@@@@+%: #@@@#. ..... .:%@@@#@@@@@#@#@@#-@@@@@@%@@@@%
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//
//
/// @title 0xGakuen NFT smart contact
/// @author Comet, JayB
contract ZeroXGakuen is ERC721ASGakuen, Ownable, ReentrancyGuard {
// 0b'00000111
// We can know amount user purchased by
// (purchasedInfo >> Identifier) & AMOUNT_MASK
uint256 internal constant AMOUNT_MASK = uint256(7);
//0b'1111...1000
uint256 internal constant PUBLIC_CLEAR_MASK = 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff8;
string private baseURI;
bool private hasExtention;
// Compiler will pack it into uint256
struct PrivateSaleConfig {
// [uint32 for time]
// Maximum value of uint32 == 4294967295 > Feb 07th, 2106
// Therefore, Impossible to overflow
// [Private Sale Config Structure]
// startTime : time when sale starts
// endTime : time when sale ends
// identifier : parameter to identify personal purchase info
// see purchaseInfo
// merkleRoot : merkleRoot to manage whitelist
// perosonalLimit : amount user can purchase, lte 3
//
// data above will be 120 bits
// and there will be pair of data
// so it is 240 bits
//
// totalPurchase is 16bits, 240+16 = 256 bits it will be packed as
//
uint32 firstStartTime;
uint32 firstEndTime;
// identifier also used as sale mask.
// it should be >>3
uint8 firstIdentifier;
bytes32 firstMerkleRoot;
uint8 firstPersonalLimit;
uint32 secondStartTime;
uint32 secondEndTime;
// identifier also used as sale mask.
// it should be >>6
uint8 secondIdentifier;
bytes32 secondMerkleRoot;
uint8 secondPersonalLimit;
// Keep track of total purchased amount to calculate public sale total limit
// Max value of uint16 is 65535, so there will be never overflow
uint16 totalPurchased;
}
PrivateSaleConfig private privateSaleConfig;
// Compiler will pack it into uint256
struct GeneralSaleConfig {
// [uint32 for time]
// Maximum value of uint32 == 4294967295 > Feb 07th, 2106
// Therefore, Impossible to overflow
uint32 startTime;
uint32 endTime;
// identifier also used as sale mask.
// it should be >> 0 for public sale
uint8 identifier;
bytes32 merkleRoot;
uint8 personalLimit;
uint16 totalLimit;
uint16 totalPurchased;
}
GeneralSaleConfig private publicSaleConfig;
struct PurchaseLimitation {
uint128 totalLimit;
uint128 reserved;
}
PurchaseLimitation public limitation = PurchaseLimitation({
totalLimit: 4649, reserved: 150
});
// purchasedInfo : keep track of amount user minted
// right 3bit keeps track of pulbic mint.
mapping(address => uint256) public purchasedInfo;
// IERC-2981 royalty info in percent, decimal
uint256 public royaltyRatio = 5;
// To minimize gas cost, set real mint price as default value
// there is only small chance to change price between deploy and minting
uint256 public privatePrice = 0.03 ether;
uint256 public publicPrice = 0.05 ether;
event ChangedPrivateSaleConfig(
uint32 firstStartTime,
uint32 firstEndTime,
uint8 firstIdentifier,
bytes32 firstMerkleRoot,
uint8 firstPersonalLimit,
uint32 secondStartTime,
uint32 secondEndTime,
uint8 secondIdentifier,
bytes32 secondMerkleRoot,
uint8 secondPersonalLimit
);
event ChangedPublicSaleConfig(
uint32 startTime,
uint32 endTime,
uint8 identifier,
uint8 personalLimit
);
constructor() ERC721ASGakuen("0xGakuen", "ZXG") {}
modifier callerIsUser() {
require(
tx.origin == msg.sender,
"Contract call from another contract is not allowed"
);
_;
}
/// @notice Mint additional NFT for owner
/// @dev use it for marketing, etc.
/// @param receiver address who will receive nft
/// @param numOfTokens NFTs will be minted to owner
function ownerMintTo(address receiver, uint256 numOfTokens) external payable onlyOwner {
_mint(receiver, numOfTokens);
}
/// @notice private sale Mint
/// @dev merkleProof should be calculated on frontend to prevent gas.
/// @dev frontend would submit the merkleProof based on user addr
/// @param merkleProof is proof calculated on frontend
/// @param identifier is bit need to shift
/// @param numOfTokens is amount user will mint
function privateMint(bytes32[] memory merkleProof, uint256 identifier, uint256 numOfTokens)
external
payable
nonReentrant
callerIsUser
{
PrivateSaleConfig memory psc = privateSaleConfig;
uint256 currentTime = block.timestamp;
bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
GeneralSaleConfig memory saleConfig;
uint256 amount;
uint256 price = privatePrice;
if(psc.firstIdentifier == identifier) {
saleConfig.startTime = psc.firstStartTime;
saleConfig.endTime = psc.firstEndTime;
saleConfig.identifier = psc.firstIdentifier;
saleConfig.merkleRoot = psc.firstMerkleRoot;
saleConfig.personalLimit = psc.firstPersonalLimit;
amount = numOfTokens;
} else if (psc.secondIdentifier == identifier) {
saleConfig.startTime = psc.secondStartTime;
saleConfig.endTime = psc.secondEndTime;
saleConfig.identifier = psc.secondIdentifier;
saleConfig.merkleRoot = psc.secondMerkleRoot;
saleConfig.personalLimit = psc.secondPersonalLimit;
amount = psc.secondPersonalLimit;
} else {
revert('No Identifier Matched');
}
require(
MerkleProof.verify(merkleProof, saleConfig.merkleRoot, leaf),
"Not listed"
);
require(
saleConfig.startTime != 0 &&
currentTime >= saleConfig.startTime &&
currentTime < saleConfig.endTime,
"Out of sale period"
);
require(
saleConfig.totalPurchased + amount <= limitation.totalLimit-limitation.reserved,
"Mint will exceed total limit"
);
uint256 _purchasedInfo = purchasedInfo[msg.sender];
uint256 purchased = ((_purchasedInfo>>saleConfig.identifier) & AMOUNT_MASK);
require((purchased+amount) <= saleConfig.personalLimit, "Personal Limit Overflow");
uint256 cost = price * amount;
require(msg.value >= cost, "ETH is not sufficient");
// it will be not bug since personalLimit is lte 3
purchasedInfo[msg.sender] = _purchasedInfo | ((purchased+amount) << saleConfig.identifier);
privateSaleConfig.totalPurchased += uint16(amount);
_mint(msg.sender, amount);
}
/// @notice Public Sale Mint
/// @dev To finish sale earlier, call finishSale()
/// @param numOfTokens NFTs will be minted to msg.sender
function publicMint(uint256 numOfTokens)
external
payable
nonReentrant
callerIsUser
{
GeneralSaleConfig memory saleConfig = publicSaleConfig;
uint256 currentTime = block.timestamp;
uint256 startTime = saleConfig.startTime;
uint256 endTime = saleConfig.endTime;
require(
startTime != 0 &&
currentTime >= startTime &&
currentTime < endTime,
"Out of sale period"
);
require(
saleConfig.totalPurchased + privateSaleConfig.totalPurchased + numOfTokens <= limitation.totalLimit - limitation.reserved,
"Mint will exceed total limit"
);
uint256 _purchasedInfo = purchasedInfo[msg.sender];
uint256 purchased = _purchasedInfo & AMOUNT_MASK;
require(
(purchased + numOfTokens) <=
saleConfig.personalLimit,
"Mint will exceed personal limit"
);
uint256 cost = publicPrice * numOfTokens;
require(msg.value >= cost, "ETH is not sufficient");
purchasedInfo[msg.sender] += numOfTokens;
publicSaleConfig.totalPurchased += uint16(numOfTokens);
_mint(msg.sender, numOfTokens);
}
/// @notice change the price
/// @param _privatePrice privatePrice will be set to it
/// @param _publicPrice publicPrice will be set to it
function setPrice(uint256 _privatePrice, uint256 _publicPrice)
external
onlyOwner
{
privatePrice = _privatePrice;
publicPrice = _publicPrice;
}
/// @notice change the totalLimit
/// @param _totalLimit is totalLimit will be set to it
function setPurchaseLimitation(uint256 _totalLimit, uint256 _reserved) external onlyOwner
{
limitation.totalLimit = uint128(_totalLimit);
limitation.reserved = uint128(_reserved);
}
function setPrivateSaleConfig(
uint32 firstStartTime,
uint32 firstEndTime,
uint8 firstIdentifier,
bytes32 firstMerkleRoot,
uint8 firstPersonalLimit,
uint32 secondStartTime,
uint32 secondEndTime,
uint8 secondIdentifier,
bytes32 secondMerkleRoot,
uint8 secondPersonalLimit
) external onlyOwner {
PrivateSaleConfig memory saleConfig = privateSaleConfig;
saleConfig.firstStartTime = firstStartTime;
saleConfig.firstEndTime = firstEndTime;
saleConfig.firstIdentifier = firstIdentifier;
saleConfig.firstMerkleRoot = firstMerkleRoot;
saleConfig.firstPersonalLimit = firstPersonalLimit;
saleConfig.secondStartTime = secondStartTime;
saleConfig.secondEndTime = secondEndTime;
saleConfig.secondIdentifier = secondIdentifier;
saleConfig.secondMerkleRoot = secondMerkleRoot;
saleConfig.secondPersonalLimit = secondPersonalLimit;
privateSaleConfig = saleConfig;
emit ChangedPrivateSaleConfig(
firstStartTime,
firstEndTime,
firstIdentifier,
firstMerkleRoot,
firstPersonalLimit,
secondStartTime,
secondEndTime,
secondIdentifier,
secondMerkleRoot,
secondPersonalLimit
);
}
function setPublicSaleConfig(
uint32 startTime,
uint32 endTime,
uint8 identifier,
uint8 personalLimit
) external onlyOwner {
GeneralSaleConfig memory saleConfig = publicSaleConfig;
saleConfig.startTime = startTime;
saleConfig.endTime = endTime;
saleConfig.identifier = identifier;
saleConfig.personalLimit = personalLimit;
publicSaleConfig = saleConfig;
emit ChangedPublicSaleConfig(
startTime,
endTime,
identifier,
personalLimit
);
}
function getPrivateSaleConfig() external view returns(
uint32 firstStartTime,
uint32 firstEndTime,
uint8 firstIdentifier,
uint8 firstPersonalLimit,
uint32 secondStartTime,
uint32 secondEndTime,
uint8 secondIdentifier,
uint8 secondPersonalLimit,
uint16 totalPurchased
) {
PrivateSaleConfig memory saleConfig = privateSaleConfig;
firstStartTime = saleConfig.firstStartTime;
firstEndTime = saleConfig.firstEndTime;
firstIdentifier = saleConfig.firstIdentifier;
firstPersonalLimit = saleConfig.firstPersonalLimit;
secondStartTime = saleConfig.secondStartTime;
secondEndTime = saleConfig.secondEndTime;
secondIdentifier = saleConfig.secondIdentifier;
secondPersonalLimit = saleConfig.secondPersonalLimit;
totalPurchased = saleConfig.totalPurchased;
}
function getPublicSaleConfig() external view returns(
uint32 startTime,
uint32 endTime,
uint8 identifier,
uint8 personalLimit,
uint16 totalPurchased
) {
GeneralSaleConfig memory saleConfig = publicSaleConfig;
startTime = saleConfig.startTime;
endTime = saleConfig.endTime;
identifier = saleConfig.identifier;
personalLimit = saleConfig.personalLimit;
totalPurchased = saleConfig.totalPurchased;
}
function getTotalPurchased() external view returns(uint256 totalPurchased) {
totalPurchased = privateSaleConfig.totalPurchased
+ limitation.reserved
+ publicSaleConfig.totalPurchased;
}
/// @notice Change baseURI
/// @param _newURI is URI to set
function setBaseURI(string memory _newURI) external onlyOwner {
baseURI = _newURI;
}
/// @notice Change hasExtention
/// @param _newState is new state to set
function setHasExtention(bool _newState) external onlyOwner {
hasExtention= _newState;
}
/// @dev override baseURI() in ERC721ASGakuen
function _baseURI()
internal
view
override(ERC721ASGakuen)
returns (string memory)
{
return baseURI;
}
/// @dev override _hasExtention() in ERC721ASGakuen
function _hasExtention()
internal
view
override(ERC721ASGakuen)
returns (bool)
{
return hasExtention;
}
/// @dev override _startTokenId() in ERC721ASGakuen
function _startTokenId() internal view virtual override returns (uint256) {
return 1;
}
/// General@dev this function will increase the schoolingId, and will reset the whole checkpoint
/// @dev use this function to start next schooling period
/// @param _begin _schoolingPolicy.schoolingBegin will be set to it
/// @param _end _schoolingPolicy.schoolingEnd will be set to it
/// @param _breaktime _schoolingPolicy.breaktime will be set to it
function _applyNewSchoolingPolicy(
uint256 _begin,
uint256 _end,
uint256 _breaktime
) external onlyOwner {
_applyNewSchoolingPolicy(
uint40(_begin),
uint40(_end),
uint40(_breaktime)
);
}
/// @dev this function change schoolingBegin without increasing the schoolingId
/// @dev use this function to fix the value set wrong
/// @param begin _schoolingPolicy.schoolingBegin will be set to it
function setSchoolingBegin(uint256 begin) external onlyOwner {
_setSchoolingBegin(uint40(begin));
}
/// @dev this function change schoolingEnd without increasing the schoolingId
/// @dev use this function to fix the value set wrong
/// @param end _schoolingPolicy.schoolingEnd will be set to it
function setSchoolingEnd(uint256 end) external onlyOwner {
_setSchoolingEnd(uint40(end));
}
/// @dev this function change breaktime without increasing the schoolingId
/// @dev use this function to fix the value set wrong
/// @param breaktime _schoolingPolicy.breaktime will be set to it
function setSchoolingBreaktime(uint256 breaktime) external onlyOwner {
_setSchoolingBreaktime(uint40(breaktime));
}
/// @dev add new checkpoint & uri to schoolingURI
/// @param checkpoint schoolingTotal required to reach this checkpoint
/// @param uri to be returned when schoolingTotal is gte to checkpoint
function addCheckpoint(uint256 checkpoint, string memory uri)
external
onlyOwner
{
_addCheckpoint(checkpoint, uri);
}
/// @dev replace existing checkpoint & uri in schoolingURI
/// @param checkpoint schoolingTotal required to reach this checkpoint
/// @param uri to be returned when schoolingTotal is gte to checkpoint
/// @param index means nth element, start from 0
function replaceCheckpoint(
uint256 checkpoint,
string memory uri,
uint256 index
) external onlyOwner {
_replaceCheckpoint(checkpoint, uri, index);
}
/// @dev replace existing checkpoint & uri in schoolingURI
/// @param index means nth element, start from 0
function removeCheckpoint(uint256 index) external onlyOwner {
_removeCheckpoint(index);
}
function exists(uint256 tokenId) public view returns (bool) {
return _exists(tokenId);
}
/// @dev withdraw balance of smart contract patially
/// @param amount is the amout to withdraw
function patialWithdraw(uint256 amount) external onlyOwner nonReentrant {
uint256 balance = address(this).balance;
require(balance >= amount, "Not enough balance");
payable(msg.sender).transfer(balance);
}
/// @dev withdraw all balance of smart contract
function withdraw() external onlyOwner nonReentrant {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
function setRoylatyInfo(uint256 _royaltyRatio) external onlyOwner nonReentrant {
royaltyRatio = _royaltyRatio;
}
/// @dev see IERC-2981
function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view returns (address receiver, uint256 royaltyAmount) {
_tokenId; // silence solc warning
receiver = owner();
royaltyAmount = (_salePrice / 100) * royaltyRatio;
return (receiver, royaltyAmount);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/cryptography/MerkleProof.sol)
pragma solidity ^0.8.0;
/**
* @dev These functions deal with verification of Merkle Tree proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*
* WARNING: You should avoid using leaf values that are 64 bytes long prior to
* hashing, or use a hash function other than keccak256 for hashing leaves.
* This is because the concatenation of a sorted pair of internal nodes in
* the merkle tree could be reinterpreted as a leaf value.
*/
library MerkleProof {
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(
bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Calldata version of {verify}
*
* _Available since v4.7._
*/
function verifyCalldata(
bytes32[] calldata proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool) {
return processProofCalldata(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/
function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
computedHash = _hashPair(computedHash, proof[i]);
}
return computedHash;
}
/**
* @dev Calldata version of {processProof}
*
* _Available since v4.7._
*/
function processProofCalldata(bytes32[] calldata proof, bytes32 leaf) internal pure returns (bytes32) {
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
computedHash = _hashPair(computedHash, proof[i]);
}
return computedHash;
}
/**
* @dev Returns true if the `leaves` can be proved to be a part of a Merkle tree defined by
* `root`, according to `proof` and `proofFlags` as described in {processMultiProof}.
*
* _Available since v4.7._
*/
function multiProofVerify(
bytes32[] memory proof,
bool[] memory proofFlags,
bytes32 root,
bytes32[] memory leaves
) internal pure returns (bool) {
return processMultiProof(proof, proofFlags, leaves) == root;
}
/**
* @dev Calldata version of {multiProofVerify}
*
* _Available since v4.7._
*/
function multiProofVerifyCalldata(
bytes32[] calldata proof,
bool[] calldata proofFlags,
bytes32 root,
bytes32[] memory leaves
) internal pure returns (bool) {
return processMultiProofCalldata(proof, proofFlags, leaves) == root;
}
/**
* @dev Returns the root of a tree reconstructed from `leaves` and the sibling nodes in `proof`,
* consuming from one or the other at each step according to the instructions given by
* `proofFlags`.
*
* _Available since v4.7._
*/
function processMultiProof(
bytes32[] memory proof,
bool[] memory proofFlags,
bytes32[] memory leaves
) internal pure returns (bytes32 merkleRoot) {
// This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
// consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
// `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
// the merkle tree.
uint256 leavesLen = leaves.length;
uint256 totalHashes = proofFlags.length;
// Check proof validity.
require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");
// The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
// `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
bytes32[] memory hashes = new bytes32[](totalHashes);
uint256 leafPos = 0;
uint256 hashPos = 0;
uint256 proofPos = 0;
// At each step, we compute the next hash using two values:
// - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
// get the next hash.
// - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
// `proof` array.
for (uint256 i = 0; i < totalHashes; i++) {
bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
hashes[i] = _hashPair(a, b);
}
if (totalHashes > 0) {
return hashes[totalHashes - 1];
} else if (leavesLen > 0) {
return leaves[0];
} else {
return proof[0];
}
}
/**
* @dev Calldata version of {processMultiProof}
*
* _Available since v4.7._
*/
function processMultiProofCalldata(
bytes32[] calldata proof,
bool[] calldata proofFlags,
bytes32[] memory leaves
) internal pure returns (bytes32 merkleRoot) {
// This function rebuild the root hash by traversing the tree up from the leaves. The root is rebuilt by
// consuming and producing values on a queue. The queue starts with the `leaves` array, then goes onto the
// `hashes` array. At the end of the process, the last hash in the `hashes` array should contain the root of
// the merkle tree.
uint256 leavesLen = leaves.length;
uint256 totalHashes = proofFlags.length;
// Check proof validity.
require(leavesLen + proof.length - 1 == totalHashes, "MerkleProof: invalid multiproof");
// The xxxPos values are "pointers" to the next value to consume in each array. All accesses are done using
// `xxx[xxxPos++]`, which return the current value and increment the pointer, thus mimicking a queue's "pop".
bytes32[] memory hashes = new bytes32[](totalHashes);
uint256 leafPos = 0;
uint256 hashPos = 0;
uint256 proofPos = 0;
// At each step, we compute the next hash using two values:
// - a value from the "main queue". If not all leaves have been consumed, we get the next leaf, otherwise we
// get the next hash.
// - depending on the flag, either another value for the "main queue" (merging branches) or an element from the
// `proof` array.
for (uint256 i = 0; i < totalHashes; i++) {
bytes32 a = leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++];
bytes32 b = proofFlags[i] ? leafPos < leavesLen ? leaves[leafPos++] : hashes[hashPos++] : proof[proofPos++];
hashes[i] = _hashPair(a, b);
}
if (totalHashes > 0) {
return hashes[totalHashes - 1];
} else if (leavesLen > 0) {
return leaves[0];
} else {
return proof[0];
}
}
function _hashPair(bytes32 a, bytes32 b) private pure returns (bytes32) {
return a < b ? _efficientHash(a, b) : _efficientHash(b, a);
}
function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, a)
mstore(0x20, b)
value := keccak256(0x00, 0x40)
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (interfaces/IERC2981.sol)
pragma solidity ^0.8.0;
import "../utils/introspection/IERC165.sol";
/**
* @dev Interface for the NFT Royalty Standard.
*
* A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal
* support for royalty payments across all NFT marketplaces and ecosystem participants.
*
* _Available since v4.5._
*/
interface IERC2981 is IERC165 {
/**
* @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of
* exchange. The royalty amount is denominated and should be paid in that same unit of exchange.
*/
function royaltyInfo(uint256 tokenId, uint256 salePrice)
external
view
returns (address receiver, uint256 royaltyAmount);
}//SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import "./IERC721ASGakuen.sol";
//
// @@@@@%+@@@@@-@@@@%#: =%@@@#- -#@@@%+ -@@@@# %@@--@@#.@@%.%@@:+@@@@@.*%%- %%#
// .=*@@@:%@@*==+@@+:@@#*@@#-@@@-@@#-+#@@#:@@@.@@@: %@@@@# .@@%-@@# +@@.:@@@ %@*==+ @@@#-@@+
// .@@@-.%@#=- %@#*=#@=@@@-+@@* *@@--@@* *@@* === =@@.@@# =@@*%@# %@@:=@@*.%@#=- -@@@@#@@:
// .@@@- +@@@@#.@@@@@@*-@@@ %@@- =@@@@+ @@@ @@@#.@@@:@@# #@@@@@+ .@@@.=@@-+@@@@#.*@@%@@@@
//.@@@= #@#= =@@%:@@%*@@*:@@@ .%@--@%::@@@ %@=*@@@@@@#.@@%-%@% =@@%:%@@ #@#= @@#+@@@+
//%@@@@@-@@@@@+%@@==@@++@@%%@@- :@@#-+#@@+@@@@@@@-@@@:*@@*=@@=.*%@.=@@@@@@--@@@@@+-@@=:@@@:
//
//
// ERC721AS is implemented based on ERC721A (Copyright (c) 2022 Chiru Labs)
// ERC721AS follow same license policy to ERC721A
//
// MIT License
//
// Copyright (c) 2022 OG Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
//
/// @title ERC721ASGakuen
/// ERC721ASGakuen for 'A'uto 'S'chooling & Zero x 'G'akuen NFT smart contract
/// @author MoeKun
/// @author JayB
contract ERC721ASGakuen is Context, ERC165, IERC721ASGakuen {
using Address for address;
using Strings for uint256;
/*
* @dev this contract use _schoolingPolicy.alpha & beta
* - alpha : current index
* - beta : number of checkpoint
*/
// Presenting whether checkpoint is deleted or not.
// "1" represent deleted.
uint256 internal constant CHECKPOINT_DELETEDMASK = uint256(1);
//0b1111111111111111111111111111111111111111111111111111111111111110
uint256 internal constant CHECKPOINT_GENERATEDMASK =
uint256(18446744073709551614);
// The tokenId of the next token to be minted.
uint256 internal _currentIndex;
// The number of tokens burned.
uint256 internal _burnCounter;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned. See _ownershipOf implementation for details.
mapping(uint256 => TokenStatus) internal _tokenStatus;
// Mapping from address to total balance
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;
SchoolingPolicy internal _schoolingPolicy;
// Array to hold schooling checkpoint
mapping(uint256 => uint256) internal _schoolingCheckpoint;
// Array to hold URI based on schooling checkpoint
mapping(uint256 => string) internal _schoolingURI;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
_currentIndex = _startTokenId();
}
/**
* If want to change the Start TokenId, override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 0;
}
/**
* Returns whether token is schooling or not.
*/
function isTakingBreak(uint256 tokenId)
external
view
override
returns (bool)
{
if (!_exists(tokenId)) revert SchoolingQueryForNonexistentToken();
return _isTakingBreak(tokenId);
}
/**
* Returns latest change time of schooling status.
*/
function schoolingTimestamp(uint256 tokenId)
external
view
override
returns (uint256)
{
if (!_exists(tokenId)) revert SchoolingQueryForNonexistentToken();
return uint256(_tokenStatus[tokenId].schoolingTimestamp);
}
/**
* Returns token's total time of shcooling.
* Used for optimizing and readablilty.
*/
function _schoolingTotal(
uint40 currentTime,
TokenStatus memory _status,
SchoolingPolicy memory _policy
) internal pure returns (uint256) {
// If schooling is on different phase, existing total = 0
if (_status.schoolingId != _policy.schoolingId) {
_status.schoolingTotal = 0;
}
// If schooling is not begun yet, total = 0
if (_policy.schoolingBegin == 0 || currentTime < _policy.schoolingBegin) {
return 0;
}
// If schooling is End,
if (_policy.schoolingEnd < currentTime) {
if (_status.schoolingTimestamp < _policy.schoolingBegin) {
return uint256(_policy.schoolingEnd - _policy.schoolingBegin);
}
if (_status.schoolingTimestamp + _policy.breaktime > _policy.schoolingEnd) {
return uint256(_status.schoolingTotal);
}
return uint256(
_status.schoolingTotal +
_policy.schoolingEnd -
_policy.breaktime -
_status.schoolingTimestamp
);
}
if (
_status.schoolingTimestamp == 0 ||
_status.schoolingTimestamp < _policy.schoolingBegin
) {
return uint256(currentTime - _policy.schoolingBegin);
}
if (_status.schoolingTimestamp + _policy.breaktime > currentTime) {
return uint256(_status.schoolingTotal);
}
return uint256(
_status.schoolingTotal +
currentTime -
_status.schoolingTimestamp -
_policy.breaktime
);
}
/**
* Returns token's total time of schooling.
*/
function schoolingTotal(uint256 tokenId)
external
view
override
returns (uint256)
{
if (!_exists(tokenId)) revert SchoolingQueryForNonexistentToken();
return
_schoolingTotal(
uint40(block.timestamp),
_tokenStatus[tokenId],
_schoolingPolicy
);
}
/**
* Returns whether token is taking break
*/
function _isTakingBreak(uint256 tokenId) internal view returns (bool) {
unchecked {
return
_schoolingPolicy.schoolingBegin != 0 &&
block.timestamp >= _schoolingPolicy.schoolingBegin &&
_tokenStatus[tokenId].schoolingTimestamp >=
_schoolingPolicy.schoolingBegin &&
((_tokenStatus[tokenId].schoolingTimestamp +
_schoolingPolicy.breaktime) > block.timestamp);
}
}
/**
* @dev use this to get first custom data in schooling policy.
*/
function _getSchoolingAlpha() internal view returns (uint256) {
unchecked {
return uint256(_schoolingPolicy.alpha);
}
}
/**
* @dev use this to set first custom data in schooling policy.
*/
function _setSchoolingAlpha(uint64 _alpha) internal {
unchecked {
_schoolingPolicy.alpha = _alpha;
}
}
/**
* @dev use this to get second custom data in schooling policy.
*/
function _getSchoolingBeta() internal view returns (uint256) {
unchecked {
return uint256(_schoolingPolicy.beta);
}
}
/**
* @dev use this to set second custom data in schooling policy.
*/
function _setSchoolingBeta(uint64 _beta) internal {
unchecked {
_schoolingPolicy.beta = _beta;
}
}
function _setSchoolingBreaktime(uint40 _breaktime) internal {
unchecked {
_schoolingPolicy.breaktime = _breaktime;
}
}
/**
* @dev set schooling begin manually
* changing it manually could be resulted in unexpected result
* please do not use it witout reasonable reason
*/
function _setSchoolingBegin(uint40 _begin) internal {
unchecked {
_schoolingPolicy.schoolingBegin = _begin;
}
}
/**
* @dev set schooling end manually
* changing it manually could be resulted in unexpected result
* please do not use it witout reasonable reason
*/
function _setSchoolingEnd(uint40 _end) internal {
unchecked {
_schoolingPolicy.schoolingEnd = _end;
}
}
/**
* @dev set schooling identifier manually
* changing it manually could be resulted in unexpected result
* please do not use it witout reasonable reason
*/
function _setSchoolingId(uint8 _schoolingId) internal {
unchecked {
_schoolingPolicy.schoolingId = _schoolingId;
}
}
/**
* Returns period of timelock.
*/
function schoolingBreaktime() external view override returns (uint256) {
unchecked {
return uint256(_schoolingPolicy.breaktime);
}
}
/**
* Returns when schooling begin in timestamp
*/
function schoolingBegin() external view override returns (uint256) {
unchecked {
return uint256(_schoolingPolicy.schoolingBegin);
}
}
/**
* Returns when schooling end in timestamp
*/
function schoolingEnd() external view override returns (uint256) {
unchecked {
return uint256(_schoolingPolicy.schoolingEnd);
}
}
/**
* Returns when schooling identifier
*/
function schoolingId() external view override returns (uint256) {
unchecked {
return uint256(_schoolingPolicy.schoolingId);
}
}
/**
* Apply new schooling policy.
* Please use this function to start new season.
*
* schoolingId will increase automatically.
* If new schooling duration is duplicated to existing duration,
* IT COULD BE ERROR
*/
function _applyNewSchoolingPolicy(
uint40 _begin,
uint40 _end,
uint40 _breaktime
) internal {
_beforeApplyNewPolicy(_begin, _end, _breaktime);
SchoolingPolicy memory _policy = _schoolingPolicy;
if(_policy.schoolingEnd != 0) {
_policy.schoolingId++;
}
_policy.schoolingBegin = _begin;
_policy.schoolingEnd = _end;
_policy.breaktime = _breaktime;
_schoolingPolicy = _policy;
_afterApplyNewPolicy(_begin, _end, _breaktime);
}
/**
* @dev Adding new schooling checkpoint, schoolingURI and schoolingURI.
*/
function _addCheckpoint(uint256 checkpoint, string memory schoolingURI)
internal
virtual
{
SchoolingPolicy memory _policy = _schoolingPolicy;
_schoolingCheckpoint[_policy.alpha] = (checkpoint &
CHECKPOINT_GENERATEDMASK);
_schoolingURI[_policy.alpha] = schoolingURI;
_policy.alpha++;
_policy.beta++;
// Update schoolingPolicy.
_schoolingPolicy = _policy;
}
function _removeCheckpoint(uint256 index) internal virtual {
uint256 i = 0;
uint256 counter = 0;
if (_schoolingPolicy.beta <= index) revert CheckpointOutOfArray();
while (true) {
if (_isExistingCheckpoint(_schoolingCheckpoint[i])) {
counter++;
}
// Checkpoint deleting sequence.
if (counter > index) {
_schoolingCheckpoint[i] |= CHECKPOINT_DELETEDMASK;
_schoolingPolicy.beta--;
return;
}
i++;
}
}
/**
* Replacing certain checkpoint and uri.
* index using for checking existence and designting certain checkpoint.
*/
function _replaceCheckpoint(
uint256 checkpoint,
string memory schoolingURI,
uint256 index
) internal virtual {
uint256 i = 0;
uint256 counter = 0;
if (_schoolingPolicy.beta <= index) revert CheckpointOutOfArray();
// counter always syncs with index+1.
// After satisfying second "if" condition, it will return.
// Therefore, while condition will never loops infinitely.
while (true) {
if (_isExistingCheckpoint(_schoolingCheckpoint[i])) {
counter++;
}
// Checkpoint and uri replacing sequence.
if (counter > index) {
_schoolingCheckpoint[i] = checkpoint;
_schoolingURI[i] = schoolingURI;
return;
}
i++;
}
}
/**
* Retruns whether checkpoint is existing or not.
* Used for optimizing and readability.
*/
function _isExistingCheckpoint(uint256 _checkpoint)
internal
pure
returns (bool)
{
return (_checkpoint & CHECKPOINT_DELETEDMASK) == 0;
}
/**
* @dev Returns tokenURI of existing token.
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
// Returns baseURI depending on schooling status.
string memory baseURI = _getSchoolingURI(tokenId);
if(_hasExtention()) {
return
bytes(baseURI).length != 0
? string(abi.encodePacked(baseURI, tokenId.toString(), ".json"))
: "";
}
else {
return
bytes(baseURI).length != 0
? string(abi.encodePacked(baseURI, tokenId.toString()))
: "";
}
}
/**
* @dev Returns on schooling URI of 'tokenId'.
* @dev Depending on total schooling time.
*/
function _getSchoolingURI(uint256 tokenId)
internal
view
virtual
returns (string memory)
{
TokenStatus memory sData = _tokenStatus[tokenId];
SchoolingPolicy memory _policy = _schoolingPolicy;
uint256 total = uint256(
_schoolingTotal(uint40(block.timestamp), sData, _policy)
);
uint256 index;
uint256 counter = 0;
for (uint256 i = 0; i < _policy.alpha; i++) {
if (
_isExistingCheckpoint(_schoolingCheckpoint[i]) &&
_schoolingCheckpoint[i] <= total
) {
index = i;
counter++;
}
}
//if satisfying 'no checkpoint' condition.
if (index == 0 && counter == 0) {
return _baseURI();
}
return _schoolingURI[index];
}
/**
* Get URI at certain index.
* index can be identified as schooling.
*/
function uriAtIndex(uint256 index)
external
view
override
returns (string memory)
{
if (index >= _schoolingPolicy.beta) revert CheckpointOutOfArray();
uint256 i = 0;
uint256 counter = 0;
while (true) {
if (_isExistingCheckpoint(_schoolingCheckpoint[i])) {
counter++;
}
if (counter > index) {
return _schoolingURI[i];
}
i++;
}
}
/**
* Get Checkpoint at certain index.
* index can be identified as schooling.
*/
function checkpointAtIndex(uint256 index)
external
view
override
returns (uint256)
{
if (index >= _schoolingPolicy.beta) revert CheckpointOutOfArray();
uint256 i = 0;
uint256 counter = 0;
while (true) {
if (_isExistingCheckpoint(_schoolingCheckpoint[i])) {
counter++;
}
if (counter > index) {
return _schoolingCheckpoint[i];
}
i++;
}
}
// returns number of checkpoints not deleted
function numOfCheckpoints() external view override returns (uint256) {
return _schoolingPolicy.beta;
}
/**
* @dev Hook that is called before call applyNewSchoolingPolicy.
*
* _begin - timestamp schooling begin
* _end - timestamp schooling end
* _breaktime - breaktime in second
*/
function _beforeApplyNewPolicy(
uint40 _begin,
uint40 _end,
uint40 _breaktime
) internal virtual {
SchoolingPolicy memory _policy = _schoolingPolicy;
_policy.alpha = 0;
_policy.beta = 0;
_schoolingPolicy = _policy;
}
/**
* @dev Hook that is called before call applyNewSchoolingPolicy.
*
* _begin - timestamp schooling begin
* _end - timestamp schooling end
* _breaktime - breaktime in second
*/
function _afterApplyNewPolicy(
uint40 _begin,
uint40 _end,
uint40 _breaktime
) internal virtual {
}
/**
* Switching token's schooling status to off in forced way
*/
function _recordSchoolingStatusChange(uint256 tokenId) internal {
TokenStatus memory _status = _tokenStatus[tokenId];
SchoolingPolicy memory _policy = _schoolingPolicy;
uint40 currentTime = uint40(block.timestamp);
_status.schoolingTotal = uint40(
_schoolingTotal(currentTime, _status, _policy)
);
_status.schoolingId = _schoolingPolicy.schoolingId;
_status.schoolingTimestamp = currentTime;
_tokenStatus[tokenId] = _status;
}
/*
* ______ _____ _____ ______ ___ __
* | ____| __ \ / ____|____ |__ \/_ | /\
* | |__ | |__) | | / / ) || | / \
* | __| | _ /| | / / / / | | / /\ \
* | |____| | \ \| |____ / / / /_ | |/ ____ \
* |______|_| \_\\_____|/_/ |____||_/_/ \_\
*
* ERC721A implementation below.
* - overrided _beforeTokenTransfers to support Auto Schooling
* - remove tracking & keeping it into TokenStatus features
*
*
*/
/**
* @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
*/
function totalSupply() public view override returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
unchecked {
return _currentIndex - _burnCounter - _startTokenId();
}
}
/**
* Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view returns (uint256) {
// Counter underflow is impossible as _currentIndex does not decrement,
unchecked {
return _currentIndex - _startTokenId();
}
}
/**
* @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 override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return _balances[owner];
}
/**
* Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around in the collection over time.
*/
function _ownershipOf(uint256 tokenId)
internal
view
returns (TokenStatus memory)
{
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr && curr < _currentIndex) {
TokenStatus memory ownership = _tokenStatus[curr];
if (!ownership.burned) {
if (ownership.owner != address(0)) {
return ownership;
}
// Invariant:
// There will always be an ownership that has an address and is not burned
// before an ownership that does not have an address and is not burned.
// Hence, curr will not underflow.
while (true) {
curr--;
ownership = _tokenStatus[curr];
if (ownership.owner != address(0)) {
return ownership;
}
}
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _ownershipOf(tokenId).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;
}
// Boolean to toggle tokenURI's extension, ".json"
function _hasExtention() internal view virtual returns (bool) {
return false;
}
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721ASGakuen.ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) {
revert ApprovalCallerNotOwnerNorApproved();
}
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId)
public
view
override
returns (address)
{
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved)
public
virtual
override
{
if (operator == _msgSender()) revert ApproveToCaller();
_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 {
_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 {
_transfer(from, to, tokenId);
if (
to.isContract() &&
!_checkContractOnERC721Received(from, to, tokenId, _data)
) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return
_startTokenId() <= tokenId &&
tokenId < _currentIndex &&
!_tokenStatus[tokenId].burned;
}
/**
* @dev Equivalent to `_safeMint(to, quantity, '')`.
*/
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, "");
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement
* {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_balances[to] += quantity;
_tokenStatus[startTokenId].owner = to;
uint256 updatedIndex = startTokenId;
uint256 end = updatedIndex + quantity;
if (to.isContract()) {
do {
emit Transfer(address(0), to, updatedIndex);
if (
!_checkContractOnERC721Received(
address(0),
to,
updatedIndex++,
_data
)
) {
revert TransferToNonERC721ReceiverImplementer();
}
} while (updatedIndex != end);
// Reentrancy protection
if (_currentIndex != startTokenId) revert();
} else {
do {
emit Transfer(address(0), to, updatedIndex++);
} while (updatedIndex != end);
}
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 quantity) internal {
uint256 startTokenId = _currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance or numberMinted overflow if current value of either + quantity > 1.8e19 (2**64) - 1
// updatedIndex overflows if _currentIndex + quantity > 1.2e77 (2**256) - 1
unchecked {
_balances[to] += quantity;
_tokenStatus[startTokenId].owner = to;
uint256 updatedIndex = startTokenId;
uint256 end = updatedIndex + quantity;
do {
emit Transfer(address(0), to, updatedIndex++);
} while (updatedIndex < end);
_currentIndex = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* 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
) private {
TokenStatus memory prevOwnership = _ownershipOf(tokenId);
if (prevOwnership.owner != from) revert TransferFromIncorrectOwner();
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_balances[from] -= 1;
_balances[to] += 1;
TokenStatus storage currSlot = _tokenStatus[tokenId];
currSlot.owner = to;
// If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenStatus storage nextSlot = _tokenStatus[nextTokenId];
if (nextSlot.owner == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.owner = from;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Equivalent to `_burn(tokenId, false)`.
*/
function _burn(uint256 tokenId) internal virtual {
_burn(tokenId, false);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
TokenStatus memory prevOwnership = _ownershipOf(tokenId);
address from = prevOwnership.owner;
if (approvalCheck) {
bool isApprovedOrOwner = (_msgSender() == from ||
isApprovedForAll(from, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
}
_beforeTokenTransfers(from, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, from);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_balances[from] -= 1;
// Keep track of who burned the token, and the timestamp of burning.
TokenStatus storage currSlot = _tokenStatus[tokenId];
currSlot.owner = from;
currSlot.burned = true;
// If the ownership slot of tokenId+1 is not explicitly set, that means the burn initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
TokenStatus storage nextSlot = _tokenStatus[nextTokenId];
if (nextSlot.owner == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId != _currentIndex) {
nextSlot.owner = from;
}
}
}
emit Transfer(from, address(0), tokenId);
_afterTokenTransfers(from, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
_burnCounter++;
}
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target 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 _checkContractOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
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 TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
* And also called before burning one token.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*
* *** IT RECORDS SCHOOLING DATA ***
*
* IF YOU DON'T WANT IT, please override this funcion
*
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {
if (startTokenId == _currentIndex) return;
uint256 updatedIndex = startTokenId;
uint256 end = updatedIndex + quantity;
do {
_recordSchoolingStatusChange(updatedIndex++);
} while (updatedIndex != end);
}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
* And also called after one token has been burned.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}// SPDX-License-Identifier: MIT
// Creator: MoeKun, JayB
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol";
interface IERC721ASGakuen is IERC721, IERC721Metadata {
/**
* The caller must own the token or be an approved operator.
*/
error ApprovalCallerNotOwnerNorApproved();
/**
* The token does not exist.
*/
error ApprovalQueryForNonexistentToken();
/**
* The token does not exist.
*/
error URIQueryForNonexistentToken();
/**
* The token does not exist.
*/
error OwnerQueryForNonexistentToken();
/**
* The caller cannot approve to their own address.
*/
error ApproveToCaller();
/**
* The caller cannot approve to the current owner.
*/
error ApprovalToCurrentOwner();
/**
* Cannot query the balance for the zero address.
*/
error BalanceQueryForZeroAddress();
/**
* Cannot mint to the zero address.
*/
error MintToZeroAddress();
/**
* The quantity of tokens minted must be more than zero.
*/
error MintZeroQuantity();
/**
* The caller must own the token or be an approved operator.
*/
error TransferCallerNotOwnerNorApproved();
/**
* The token must be owned by `from`.
*/
error TransferFromIncorrectOwner();
/**
* Cannot safely transfer to a contract that does not implement the ERC721Receiver interface.
*/
error TransferToNonERC721ReceiverImplementer();
/**
* Cannot transfer to the zero address.
*/
error TransferToZeroAddress();
/**
* The token does not exist.
*/
error SchoolingQueryForNonexistentToken();
/**
* Index is out of array's range.
*/
error CheckpointOutOfArray();
// Compiler will pack this into a single 256bit word.
struct TokenStatus {
// The address of the owner.
address owner;
// Keeps track of the latest time User toggled schooling.
uint40 schoolingTimestamp;
// Keeps track of the total time of schooling.
// Left 4Most bit
uint40 schoolingTotal;
// State to support multiple seasons
uint8 schoolingId;
// Whether the token has been burned.
bool burned;
}
// Compiler will pack this into a single 256bit word.
struct SchoolingPolicy {
uint64 alpha;
uint64 beta;
uint40 schoolingBegin;
uint40 schoolingEnd;
uint8 schoolingId;
uint40 breaktime;
}
/**
* @dev Returns total schooling time.
*/
function schoolingTotal(uint256 tokenId) external view returns (uint256);
/**
* @dev Returns latest change time of schooling status.
*/
function schoolingTimestamp(uint256 tokenId)
external
view
returns (uint256);
/**
* @dev Returns whether token is schooling or not.
*/
function isTakingBreak(uint256 tokenId) external view returns (bool);
/**
* @dev Returns number of existing checkpoint + deleted checkpoint.
*/
/**
* returns number of checkpoints not deleted
*/
function numOfCheckpoints() external view returns (uint256);
/**
* Get URI at certain index.
* index can be identified as grade.
*/
function uriAtIndex(uint256 index) external view returns (string memory);
/**
* Get Checkpoint at certain index.
* index can be identified as grade.
*/
function checkpointAtIndex(uint256 index) external view returns (uint256);
/**
* @dev Returns time when schooling begin
*/
function schoolingBegin() external view returns (uint256);
/**
* @dev Returns time when schooling end
*/
function schoolingEnd() external view returns (uint256);
/**
* @dev Returns breaktime for schooling
*/
function schoolingBreaktime() external view returns (uint256);
/**
* @dev Returns breaktime for schooling
*/
function schoolingId() external view returns (uint256);
/**
* @dev Returns the total amount of tokens stored by the contract.
* @dev Burned tokens are calculated here, use _totalMinted() if you want to count just minted tokens.
*/
function totalSupply() external view returns (uint256);
}{
"optimizer": {
"enabled": true,
"runs": 1000
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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g","outputs":[{"internalType":"uint32","name":"firstStartTime","type":"uint32"},{"internalType":"uint32","name":"firstEndTime","type":"uint32"},{"internalType":"uint8","name":"firstIdentifier","type":"uint8"},{"internalType":"uint8","name":"firstPersonalLimit","type":"uint8"},{"internalType":"uint32","name":"secondStartTime","type":"uint32"},{"internalType":"uint32","name":"secondEndTime","type":"uint32"},{"internalType":"uint8","name":"secondIdentifier","type":"uint8"},{"internalType":"uint8","name":"secondPersonalLimit","type":"uint8"},{"internalType":"uint16","name":"totalPurchased","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPublicSaleConfig","outputs":[{"internalType":"uint32","name":"startTime","type":"uint32"},{"internalType":"uint32","name":"endTime","type":"uint32"},{"internalType":"uint8","name":"identifier","type":"uint8"},{"internalType":"uint8","name":"personalLimit","type":"uint8"},{"internalType":"uint16","name":"totalPurchased","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTotalPurchased","outputs":[{"internalType":"uint256","name":"totalPurchased","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"isTakingBreak","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"limitation","outputs":[{"internalType":"uint128","name":"totalLimit","type":"uint128"},{"internalType":"uint128","name":"reserved","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"numOfCheckpoints","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"numOfTokens","type":"uint256"}],"name":"ownerMintTo","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"patialWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"},{"internalType":"uint256","name":"identifier","type":"uint256"},{"internalType":"uint256","name":"numOfTokens","type":"uint256"}],"name":"privateMint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"privatePrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"numOfTokens","type":"uint256"}],"name":"publicMint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"publicPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"purchasedInfo","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"removeCheckpoint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"checkpoint","type":"uint256"},{"internalType":"string","name":"uri","type":"string"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"replaceCheckpoint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"uint256","name":"_salePrice","type":"uint256"}],"name":"royaltyInfo","outputs":[{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"royaltyAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"royaltyRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"schoolingBegin","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"schoolingBreaktime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"schoolingEnd","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"schoolingId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"schoolingTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"schoolingTotal","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_newURI","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"_newState","type":"bool"}],"name":"setHasExtention","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_privatePrice","type":"uint256"},{"internalType":"uint256","name":"_publicPrice","type":"uint256"}],"name":"setPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"firstStartTime","type":"uint32"},{"internalType":"uint32","name":"firstEndTime","type":"uint32"},{"internalType":"uint8","name":"firstIdentifier","type":"uint8"},{"internalType":"bytes32","name":"firstMerkleRoot","type":"bytes32"},{"internalType":"uint8","name":"firstPersonalLimit","type":"uint8"},{"internalType":"uint32","name":"secondStartTime","type":"uint32"},{"internalType":"uint32","name":"secondEndTime","type":"uint32"},{"internalType":"uint8","name":"secondIdentifier","type":"uint8"},{"internalType":"bytes32","name":"secondMerkleRoot","type":"bytes32"},{"internalType":"uint8","name":"secondPersonalLimit","type":"uint8"}],"name":"setPrivateSaleConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"startTime","type":"uint32"},{"internalType":"uint32","name":"endTime","type":"uint32"},{"internalType":"uint8","name":"identifier","type":"uint8"},{"internalType":"uint8","name":"personalLimit","type":"uint8"}],"name":"setPublicSaleConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_totalLimit","type":"uint256"},{"internalType":"uint256","name":"_reserved","type":"uint256"}],"name":"setPurchaseLimitation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_royaltyRatio","type":"uint256"}],"name":"setRoylatyInfo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"begin","type":"uint256"}],"name":"setSchoolingBegin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"breaktime","type":"uint256"}],"name":"setSchoolingBreaktime","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"end","type":"uint256"}],"name":"setSchoolingEnd","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"uriAtIndex","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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