Contract Name:
JellyBabies
Contract Source Code:
// SPDX-License-Identifier: Unlicense
// Creator: CrudeBorne
// ∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰
// ∰∰∰∰∰∰∰∰∰∰∰∰∰∰ __爪爪__ ∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰
// ∰∰∰∰∰∰∰∰∰∰∰∰ 爪ρρρρρρρρρρρρ爪 ∰∰∰∰∰∰∰∰∰∰∰∰∰
// ∰∰∰∰∰∰∰∰∰∰ 爪ρρρρρρρρρρρρρρρρρρρρ爪 ∰∰∰∰∰∰∰∰∰∰∰
// ∰∰∰∰∰∰∰∰Ω 爪ρρρρρρρρρρρρ☤☤ρρρρρρρρρρρρ爪 Ω∰∰∰∰∰∰∰∰∰
// ∰∰∰∰∰∰∰Ω 爪ρρρρρρρρρρρρρρρ☤☤ρρρρρρρρρρρρρρρ爪 Ω∰∰∰∰∰∰∰∰
// ∰∰∰∰∰∰Ω 爪ρρρρρρρρρρρρρρρρρ☤☤ρρρρρρρρρρρρρρρρρ爪 Ω∰∰∰∰∰∰∰
// ∰∰∰∰∰Ω 爪ρρρρρρρρρρρρρρρρρρ☤☤☤☤ρρρρρρρρρρρρρρρρρρ爪 Ω∰∰∰∰∰∰
// ∰∰∰∰∰ 爪ρρρρρρρρρρρρρρρρρρ☤☤☤☤☤☤ρρρρρρρρρρρρρρρρρρ爪 ∰∰∰∰∰∰
// ∰∰∰∰Ω 爪ρρρρρρρρρρρρρρρρρρ☤☤☤☤☤☤☤☤ρρρρρρρρρρρρρρρρρρ爪 Ω∰∰∰∰∰
// ∰∰∰∰ 爪ρρρρρρρρρρρρρρρρρ☤☤☤☤☤☤☤☤☤☤☤☤ρρρρρρρρρρρρρρρρρ爪 ∰∰∰∰∰
// ∰∰∰Ω 爪ρρρρρρρρρρρρρρρρ☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤ρρρρρρρρρρρρρρρρ爪 Ω∰∰∰∰
// ∰∰∰Ω 爪ρρρρρρρρρρρρρ☤☤☤☤☤☤☤☤EGGGGG☤☤☤☤☤☤☤☤ρρρρρρρρρρρρρ爪 Ω∰∰∰∰
// ∰∰∰Ω 爪ρρρρρρρρρρρρ☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤☤ρρρρρρρρρρρρ爪 Ω∰∰∰∰
// ∰∰∰Ω 爪ρρρρρρρρρρρρ☤☤☤☤☤☤☤☤☤☤ρ☤☤ρ☤☤☤☤☤☤☤☤☤☤ρρρρρρρρρρρρ爪 Ω∰∰∰∰
// ∰∰∰∰ 爪ρρρρρρρρρρρρρ☤☤☤☤☤☤ρρρ☤☤ρρρ☤☤☤☤☤☤ρρρρρρρρρρρρρ爪 ∰∰∰∰∰
// ∰∰∰∰Ω 爪ρρρρρρρρρρρρρρρρρρρρρ☤☤ρρρρρρρρρρρρρρρρρρρρρ爪 Ω∰∰∰∰∰
// ∰∰∰∰∰ 爪ρρρρρρρρρρρρρρρρρρ☤☤☤☤ρρρρρρρρρρρρρρρρρρ爪 ∰∰∰∰∰∰
// ∰∰∰∰∰∰Ω 爪ρρρρρρρρρρρρρ☤☤☤☤☤☤☤☤ρρρρρρρρρρρρρ爪 Ω∰∰∰∰∰∰∰
// ∰∰∰∰∰∰∰∰Ω 爪ρρρρρρρρρρρρρρρρρρρρρρρρ爪 Ω∰∰∰∰∰∰∰∰∰
// ∰∰∰∰∰∰∰∰∰∰ΩΩΩ °°°°爪爪爪爪°°°° ΩΩΩ∰∰∰∰∰∰∰∰∰∰
// ∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰∰
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "./ERC721.sol";
// ꃃꆂ꒓ꁒꍟ
// ________ ________ __ __ _______ _________
// /⚚⚚⚚⚚⚚⚚⚚⚚\ ||.‾‾‾‾‾\\ ||. || ||.‾‾‾‾\\ |⚚.‾‾‾‾‾‾\\
// /⚚⚚/‾‾‾‾\⚚⚚\ ||. \\ ||. || ||. \\ ||. ‾
// /⚚⚚/ ‾‾‾ ||. // ||. || |⚚. \\ ||.
// |⚚⚚| ||._____// ||. || ||. || ||.======|
// \⚚⚚\ ___ |⚚.‾‾‾‾‾\\ \\. // ||. // ||.
// \⚚⚚\____/⚚⚚/ ||. \\ \\. // ||. // ||. _
// \⚚⚚⚚⚚⚚⚚⚚⚚/ ||. || \⚚.__// ||.____// ||.______//
// ‾‾‾‾‾‾‾‾ ‾‾ ‾‾ ‾‾‾‾‾ ‾‾‾‾‾‾‾ ‾‾‾‾‾‾‾‾‾
// ꃃꆂ꒓ꁒꍟ
contract JellyBabies is ERC721, Ownable {
using Strings for uint256;
string public PROVENANCE;
bool provenanceSet;
bool public swimming;
enum Timeline {
Yate,
Yeet,
Yote
}
Timeline public wen = Timeline.Yate;
mapping(address => uint256) private paymentInfo;
uint256 totalReceived = 0;
mapping(address => uint256) amountsWithdrawn;
modifier onlyPayee() {
_isPayee();
_;
}
function _isPayee() internal view virtual {
require(paymentInfo[msg.sender] > 0, "not a royalty payee");
}
mapping(address => bool) public authorized;
mapping(uint256 => uint256) public companionFound;
CrudeBorneEggs public cbeContract;
string collectionDescription = "Would you like a jelly baby?";
string collecImg = "";
string externalLink = "https://crudeborne.wtf";
// ____ ____
// | | | |
// |54|====----|74|
// \ \ / /
// \68\===---/49/
// \ \ / /
// \65\=-/64/
// \ \/ /
// \⇓⇓\ /
// \⇓⇓\
// / \⇓⇓\
// / /\ \
// /6E/-=\42\
// / / \ \
// /69/---===\61\
// / / \ \
// |46|----====|73|
// | | | |
// |75|====----|65|
// \ \ / /
// \6F\===---/64/
// \ \ / /
// \59\=-/43/
// \ \/ /
// \⇑⇑\ /
// \⇑⇑\
// / \⇑⇑\
// / /\ \
// /6F/-=\6E\
// / / \ \
// /64/---===\61\
// / / \ \
// |65|----====|43|
// | | | |
// ‾‾‾‾ ‾‾‾‾
constructor(
address _cbeAddy,
string memory _name,
string memory _symbol,
address[] memory _payees,
uint128[] memory _basisPoints
) ERC721(_name, _symbol) {
for (uint256 i = 0; i < _payees.length; i++) {
paymentInfo[_payees[i]] = _basisPoints[i];
}
cbeContract = CrudeBorneEggs(_cbeAddy);
}
// p̸͓̂ą̵̢̗̘̫̼̯̻̃û̶̦̰̝͉͋̈́ͅs̵͉̒̃̐e̶͓̐̋̂̽̀̂́̕͝.̶̢̼̮͚̪̲͐̿̀̉͐̅̊͌̈̚.̴̯̮͈͋̂͗͒͐͊̌͋.̴̧͕̣͓̗͓͛̔ ̵̡͇̩̟̭̖͔͎͒̊̕͘t̴̫͚͚͚͒̀͒̃̈̈̿̍̽ĥ̸̨͓̠͖͎͙̙̱̙̄i̸̤͖̪̥͓̪̬̰͍͆́̒̊̒̃̏͒̈n̸̼̩̼̖̾͐̂̃̈́̅̈́͊̚͘ķ̸̡̋.̶̳͕̱̫͍̮́͒̉.̷̨̲̝̰̮͖̳̈́̔̄͗͊̈́̀̕.̵̙̗̦͗̄͗͝
function addAuthorized(address toAuthorize) public onlyOwner {
authorized[toAuthorize] = true;
}
function setProvenanceHash(string memory provenanceHash) public onlyOwner {
require(!provenanceSet);
PROVENANCE = provenanceHash;
provenanceSet = true;
}
function swimOrSink() external onlyOwner {
swimming = !swimming;
}
// ຟi๖๖lฯ ຟ໐๖๖lฯ
function setTimeyWimey(Timeline _wen) public onlyOwner {
require(_wen != Timeline.Yate);
wen = _wen;
}
function setBaseURI(string memory baseURI) public onlyOwner {
_setBaseURI(baseURI);
}
function hazCompanion(uint256 disEgg) public view returns (bool) {
uint256 eggBlocc = disEgg/250;
uint256 eggSlot = disEgg - eggBlocc*250;
return ((companionFound[eggBlocc] >> eggSlot)%2 == 1);
}
function dontGoAlone(uint256[] memory eggz) public {
require(wen == Timeline.Yeet || (authorized[msg.sender] && (wen == Timeline.Yate)), 'w');
uint256 curBlocc = 0;
uint256 bloccUpdates = 0;
uint256 eggBlocc;
bool companionRequire = true;
bool ownerRequire = true;
// ʂơɱɛ ɬɧıŋɠʂ ɧą۷ɛ ƈơɱɛ ɬɧཞơųɠɧ ơųɬ ơʄ ơཞɖɛཞ
for (uint256 i = 0; i < eggz.length; i++) {
eggBlocc = eggz[i]/250;
if (eggBlocc != curBlocc) {
companionFound[curBlocc] = companionFound[curBlocc] | bloccUpdates;
curBlocc = eggBlocc;
bloccUpdates = 0;
}
uint256 eggSlot = eggz[i] - curBlocc*250;
companionRequire = companionRequire && (companionFound[curBlocc] >> eggSlot)%2 == 0;
ownerRequire = ownerRequire && cbeContract.ownerOf(eggz[i]) == msg.sender;
bloccUpdates += (1 << eggSlot);
}
require(companionRequire, 'c');
require(ownerRequire, 'o');
companionFound[curBlocc] = companionFound[curBlocc] | bloccUpdates;
_safeMint(msg.sender, eggz.length);
}
// ρ(௶؆ξ) ∺ 爪(ϒ६∑ナ)/∰(￥Ꭿ₸ໂ) //
function setCollectionDescription(string memory _collectionDescription) public onlyOwner {
collectionDescription = _collectionDescription;
}
function setCollecImg(string memory _collecImg) public onlyOwner {
collecImg = _collecImg;
}
function setExternalLink(string memory _externalLink) public onlyOwner {
externalLink = _externalLink;
}
// ᄃ8ん10刀4の2
function contractURI() public view returns (string memory) {
return string(
abi.encodePacked(
"data:application/json;utf8,{\"name\":\"CrudeBorne: Jelly Babies\",",
"\"description\":\"", collectionDescription, "\",",
"\"image\":\"", collecImg, "\",",
"\"external_link\":\"", externalLink, "\",",
"\"seller_fee_basis_points\":420,\"fee_recipient\":\"",
uint256(uint160(address(this))).toHexString(), "\"}"
)
);
}
///////////////////////
// 鷹 //
// ☢☢☢☢☢☢☢☢☢☢☢☢☢☢☢☢ //
/////////////////////
receive() external payable {
totalReceived += msg.value;
}
function withdraw() public onlyPayee {
uint256 totalForPayee = (totalReceived/10000)*paymentInfo[msg.sender];
uint256 toWithdraw = totalForPayee - amountsWithdrawn[msg.sender];
amountsWithdrawn[msg.sender] = totalForPayee;
(bool success, ) = payable(msg.sender).call{value: toWithdraw}("");
require(success, "Payment failed!");
}
}
// ⟨ρ|∞⟩
abstract contract CrudeBorneEggs {
function balanceOf(address owner) public view virtual returns (uint256);
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual returns (uint256);
function ownerOf(uint256 tokenId) public view virtual returns (address);
}
////////////////////////////////////////
// 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 (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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);
/**
* @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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
uint256 amount
) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.3) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
import "../Strings.sol";
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS,
InvalidSignatureV
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
/// @solidity memory-safe-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// SPDX-License-Identifier: Unlicense
// Creator: CrudeBorne
pragma solidity ^0.8.9;
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/token/ERC721/extensions/IERC721Enumerable.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";
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable {
using Address for address;
using Strings for uint256;
uint256 private currentIndex = 0;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Base URI
string private _baseURI;
string private _preRevealURI;
mapping(uint256 => address) private _ownerships;
mapping(address => uint256) private _balances;
address public immutable burnAddress = 0x000000000000000000000000000000000000dEaD;
uint256 private numTokensBurned;
// 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;
constructor(
string memory name_,
string memory symbol_
) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view override returns (uint256) {
return (currentIndex - numTokensBurned);
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
require(index < totalSupply(), "g");
require(ownerOf(index) != burnAddress, "b");
return index;
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
* This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first.
* It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
require(index < balanceOf(owner), "b");
uint256 numMintedSoFar = totalSupply();
uint256 tokenIdsIdx = 0;
address currOwnershipAddr = address(0);
for (uint256 i = 0; i < numMintedSoFar; i++) {
address ownership = _ownerships[i];
if (ownership != address(0)) {
currOwnershipAddr = ownership;
}
if (currOwnershipAddr == owner) {
if (tokenIdsIdx == index) {
return i;
}
tokenIdsIdx++;
}
}
revert("u");
}
/**
* @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 ||
interfaceId == type(IERC721Enumerable).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "0");
return uint256(_balances[owner]);
}
// function ownershipOf(uint256 tokenId) internal view returns (address) {
// require(tokenId < currentIndex, "t");
//
//// uint256 lowestTokenToCheck;
//// // if (tokenId >= maxBatchSize) {
//// // lowestTokenToCheck = tokenId - maxBatchSize + 1;
//// // }
//// if (tokenId >= maxOwnerBatchSize) {
//// lowestTokenToCheck = tokenId - maxOwnerBatchSize + 1;
//// }
//
//// for (uint256 curr = tokenId; curr >= lowestTokenToCheck; curr--) {
// for (uint256 curr = tokenId; curr >= 0; curr--) {
// address ownership = _ownerships[curr];
// if (ownership != address(0)) {
// return ownership;
// }
// }
//
// revert("o");
// }
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
// return ownershipOf(tokenId);
require(tokenId < currentIndex, "t");
for (uint256 curr = tokenId; curr >= 0; curr--) {
address ownership = _ownerships[curr];
if (ownership != address(0)) {
return ownership;
}
}
revert("o");
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "z");
if (bytes(_baseURI).length > 0) {
return string(abi.encodePacked(_baseURI, "/", tokenId.toString(), ".json"));
}
else {
return _preRevealURI;
}
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/
function baseURI() public view virtual returns (string memory) {
return _baseURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI},
* or to the token ID if {tokenURI} is empty.
*/
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
function preRevealURI() public view virtual returns (string memory) {
return _preRevealURI;
}
function _setPreRevealURI(string memory preRevealURI_) internal virtual {
_preRevealURI = preRevealURI_;
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "o");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"a"
);
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), "a");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public override {
require(operator != _msgSender(), "a");
_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 override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public override {
_transfer(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"z"
);
}
function burnToken(uint256 tokenId) public {
_transfer(ownerOf(tokenId), burnAddress, tokenId);
numTokensBurned++;
}
/**
* @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 (tokenId < currentIndex && ownerOf(tokenId) != burnAddress);
}
function _safeMint(address to, uint256 quantity) internal {
_safeMint(to, quantity, "");
}
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal {
uint256 startTokenId = currentIndex;
require(to != address(0), "0");
// We know if the first token in the batch doesn't exist, the other ones don't as well, because of serial ordering.
require(!_exists(startTokenId), "a");
// if (from != address(0)) {
// _beforeTokenTransfers(address(0), from, startTokenId, quantity);
// }
// if (from != to) {
// _beforeTokenTransfers(from, to, startTokenId, quantity);
// }
// _beforeTokenTransfers(address(0), to, startTokenId, quantity);
// AddressData memory addressData = _addressData[to];
// _addressData[to] = AddressData(
// addressData.balance + uint128(quantity),
// addressData.numberMinted + uint128(quantity)
// );
// _ownerships[startTokenId] = TokenOwnership(to, uint64(block.timestamp));
_balances[to] = quantity;
_ownerships[startTokenId] = to;
uint256 updatedIndex = startTokenId;
for (uint256 i = 0; i < quantity; i++) {
// if (from != address(0)) {
// emit Transfer(address(0), from, updatedIndex);
// }
// if (from != to) {
// emit Transfer(from, to, updatedIndex);
// }
emit Transfer(address(0), to, updatedIndex);
require(
// _checkOnERC721Received(address(0), from, updatedIndex, _data) && _checkOnERC721Received(from, to, updatedIndex, _data),
_checkOnERC721Received(address(0), to, updatedIndex, _data),
"z"
);
updatedIndex++;
}
currentIndex = updatedIndex;
// if (from != address(0)) {
// _afterTokenTransfers(address(0), from, startTokenId, quantity);
// }
// if (from != to) {
// _afterTokenTransfers(from, to, startTokenId, quantity);
// }
// _afterTokenTransfers(address(0), to, startTokenId, quantity);
}
function _transfer(
address from,
address to,
uint256 tokenId
) private {
address prevOwnership = ownerOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == prevOwnership ||
getApproved(tokenId) == _msgSender() ||
isApprovedForAll(prevOwnership, _msgSender()));
require(isApprovedOrOwner, "a");
require(prevOwnership == from, "o");
require(to != address(0), "0");
// _beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, prevOwnership);
_balances[from] -= 1;
_balances[to] += 1;
_ownerships[tokenId] = 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;
if (_ownerships[nextTokenId] == address(0)) {
if (_exists(nextTokenId)) {
_ownerships[nextTokenId] = prevOwnership;
}
}
emit Transfer(from, to, tokenId);
// _afterTokenTransfers(from, to, tokenId, 1);
}
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/******************/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("z");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
}
////////////////////////////////////////
// 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 (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) (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 v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// 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
// 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);
}