Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity 0.8.4;
import "@limitbreak/creator-token-contracts/contracts/erc721c/ERC721C.sol";
import "@limitbreak/creator-token-contracts/contracts/programmable-royalties/BasicRoyalties.sol";
import "@limitbreak/creator-token-contracts/contracts/access/OwnableBasic.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
contract RunaAGI is OwnableBasic, ERC721C, ReentrancyGuard, BasicRoyalties {
using Counters for Counters.Counter;
Counters.Counter private _tokenIdCounter;
uint256 public saleSupplyMinted;
string private __baseURI;
using ECDSA for bytes32;
uint256 public maxSupply;
uint256 private constant treasurySupply = 50;
uint256 private constant preSaleSupply = 500;
uint256 public saleSupply = 1450;
uint256 private constant salePrice = 0.06 ether;
uint256 private _totalSupply;
address public immutable signer;
bool public isTradeActive;
bool public isClaimActive;
bool public isWhiteListMintingActive;
bool public isFCFSMintingActive;
mapping(address => uint256) public claimedNFTs;
mapping(address => bool) public whitelistMinted;
mapping(address => uint256) public fcfsMinted;
mapping(bytes => bool) private signatures;
event TradeStateUpdated(bool indexed isActive);
event ClaimStateUpdated(bool indexed isActive);
event WhitelistMintingStateUpdated(bool indexed isActive);
event FCFSMintingStateUpdated(bool indexed isActive);
event SupplyChanged(uint256 indexed newSupply);
event FundsWithdrawn(address indexed to, uint256 indexed amount);
event PreSaleClaimed(address indexed claimer, uint256 indexed quantity);
event WhiteListMinted(address indexed minter, uint256 indexed tokenId);
event FCFSMinted(address indexed minter, uint256 indexed tokenId);
event TokensMinted(address indexed to, uint256 indexed amount);
event BaseURIUpdated(string newBaseURI);
constructor(
address royaltyReceiver_,
uint96 royaltyFeeNumerator_,
string memory name,
string memory symbol,
string memory baseURI,
address _signer
)
ERC721OpenZeppelin(name, symbol)
BasicRoyalties(royaltyReceiver_, royaltyFeeNumerator_)
{
require(_signer != address(0), "Invalid signer address");
signer = _signer;
__baseURI = baseURI;
maxSupply = saleSupply + treasurySupply + preSaleSupply;
_tokenIdCounter.increment();
isTradeActive = false;
isClaimActive = false;
isWhiteListMintingActive = false;
isFCFSMintingActive = false;
}
function setDefaultRoyalty(
address receiver_,
uint96 feeNumerator_
) public onlyOwner {
_setDefaultRoyalty(receiver_, feeNumerator_);
}
function setTokenRoyalty(
uint256 tokenId_,
address receiver_,
uint96 feeNumerator_
) public onlyOwner {
_setTokenRoyalty(tokenId_, receiver_, feeNumerator_);
}
function claimPreSale(
uint256 _quantity,
uint256 _salt,
bytes32 _msgHash,
bytes memory _signature
) external nonReentrant {
require(isClaimActive, "Claiming is not active");
require(
_totalSupply + _quantity <= preSaleSupply,
"Exceeds presale token supply"
);
bytes32 msgHash = keccak256(
abi.encodePacked(msg.sender, _quantity, _salt)
);
bytes32 signedMsgHash = msgHash.toEthSignedMessageHash();
require(signedMsgHash == _msgHash, "Invalid message hash!");
require(_msgHash.recover(_signature) == signer, "Invalid signer!");
signatures[_signature] = true;
for (uint256 i = 0; i < _quantity; i++) {
_safeMint(msg.sender, _tokenIdCounter.current());
_totalSupply++;
_tokenIdCounter.increment();
}
claimedNFTs[msg.sender] += _quantity;
emit PreSaleClaimed(msg.sender, _quantity);
}
function whitelistMint(
uint256 _salt,
bytes32 _msgHash,
bytes memory _signature
) external payable nonReentrant {
require(isWhiteListMintingActive, "Whitelist minting is not active");
require(saleSupplyMinted + 1 <= saleSupply, "Maximum supply reached");
require(msg.value == salePrice, "Incorrect ether amount");
require(
!whitelistMinted[msg.sender],
"Already minted through whitelist"
);
bytes32 msgHash = keccak256(abi.encodePacked(msg.sender, _salt));
bytes32 signedMsgHash = msgHash.toEthSignedMessageHash();
require(signedMsgHash == _msgHash, "Invalid message hash!");
require(_msgHash.recover(_signature) == signer, "Invalid signer!");
signatures[_signature] = true;
whitelistMinted[msg.sender] = true;
_safeMint(msg.sender, _tokenIdCounter.current());
_tokenIdCounter.increment();
_totalSupply++;
saleSupplyMinted++;
emit WhiteListMinted(msg.sender, _tokenIdCounter.current() - 1);
}
function FCFSMint(
uint256 _quantity,
uint256 _salt,
bytes32 _msgHash,
bytes memory _signature
) external payable nonReentrant {
require(isFCFSMintingActive, "FCFS minting is not active");
require(
saleSupplyMinted + _quantity <= saleSupply,
"Maximum supply reached"
);
require(msg.value == salePrice * _quantity, "Incorrect ether amount");
require(_quantity <= 2, "Quantity cannot exceed 2");
require(fcfsMinted[msg.sender] + _quantity <= 2, "Limit reached");
bytes32 msgHash = keccak256(
abi.encodePacked(msg.sender, _quantity, _salt)
);
bytes32 signedMsgHash = msgHash.toEthSignedMessageHash();
require(signedMsgHash == _msgHash, "Invalid message hash!");
require(_msgHash.recover(_signature) == signer, "Invalid signer!");
signatures[_signature] = true;
for (uint256 i = 0; i < _quantity; i++) {
_safeMint(msg.sender, _tokenIdCounter.current());
_tokenIdCounter.increment();
_totalSupply++;
saleSupplyMinted++;
fcfsMinted[msg.sender]++;
emit FCFSMinted(msg.sender, _tokenIdCounter.current() - 1);
}
}
function mintToWallet(address _to, uint256 _amount) external onlyOwner {
require(_totalSupply + _amount <= maxSupply, "Exceeds maximum supply");
for (uint256 i = 0; i < _amount; i++) {
_safeMint(_to, _tokenIdCounter.current());
emit TokensMinted(_to, _tokenIdCounter.current());
_tokenIdCounter.increment();
_totalSupply++;
// this condition is applied bcx if sale SaleSupply all minted then this function can be able to mint from treasurySupply.
if (saleSupplyMinted < saleSupply) {
saleSupplyMinted++;
}
}
}
function changeSupply(uint256 _newTotalSupply) external onlyOwner {
require(
_newTotalSupply >=
(preSaleSupply + treasurySupply + saleSupplyMinted),
"New total supply must be greater than or equal to the sum of pre-sale and treasury supplies"
);
require(
_newTotalSupply < maxSupply,
"Supply cannot be greater greater than or equal old supply"
);
// Decrease in total supply
uint256 decreaseAmount = maxSupply - _newTotalSupply;
require(
saleSupply - decreaseAmount >= saleSupplyMinted,
"Cannot set sale supply lower than minted supply"
);
saleSupply -= decreaseAmount;
maxSupply = _newTotalSupply;
emit SupplyChanged(_newTotalSupply);
}
function withdrawFunds(address payable _to) external onlyOwner {
require(_to != address(0), "Invalid recipient address");
uint256 balance = address(this).balance;
(bool success, ) = payable(_to).call{value: balance}("");
require(success, "Transfer failed.");
emit FundsWithdrawn(_to, balance);
}
function toggleTradeState() public onlyOwner {
isTradeActive = !isTradeActive;
emit TradeStateUpdated(isTradeActive);
}
function toggleClaimState() public onlyOwner {
isClaimActive = !isClaimActive;
emit ClaimStateUpdated(isClaimActive);
}
function toggleWhitelistMintingState() public onlyOwner {
isWhiteListMintingActive = !isWhiteListMintingActive;
emit WhitelistMintingStateUpdated(isWhiteListMintingActive);
}
function toggleFCFSMintingState() public onlyOwner {
isFCFSMintingActive = !isFCFSMintingActive;
emit FCFSMintingStateUpdated(isFCFSMintingActive);
}
function setBaseURI(string calldata newBaseURI) external onlyOwner {
__baseURI = newBaseURI;
emit BaseURIUpdated(newBaseURI);
}
function _baseURI()
internal
view
virtual
override(ERC721)
returns (string memory)
{
return __baseURI;
}
function totalSupply() public view returns (uint256) {
return _totalSupply;
}
function setApprovalForAll(
address operator,
bool approved
) public virtual override(ERC721) {
require(isTradeActive, "Contract is not tradable");
super.setApprovalForAll(operator, approved);
}
function approve(
address to,
uint256 tokenId
) public virtual override(ERC721) {
require(isTradeActive, "Contract is not tradable");
super.approve(to, tokenId);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize
) internal virtual override(ERC721C) {
// Check if trade is paused and the sender is not the zero address
if (from != address(0) && to != address(0)) {
require(isTradeActive, "Token transfer while trade paused");
}
super._beforeTokenTransfer(from, to, firstTokenId, batchSize);
}
function supportsInterface(
bytes4 interfaceId
) public view virtual override(ERC721C, ERC2981) returns (bool) {
return
ERC721C.supportsInterface(interfaceId) ||
ERC2981.supportsInterface(interfaceId);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard signed math utilities missing in the Solidity language.
*/
library SignedMath {
/**
* @dev Returns the largest of two signed numbers.
*/
function max(int256 a, int256 b) internal pure returns (int256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two signed numbers.
*/
function min(int256 a, int256 b) internal pure returns (int256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two signed numbers without overflow.
* The result is rounded towards zero.
*/
function average(int256 a, int256 b) internal pure returns (int256) {
// Formula from the book "Hacker's Delight"
int256 x = (a & b) + ((a ^ b) >> 1);
return x + (int256(uint256(x) >> 255) & (a ^ b));
}
/**
* @dev Returns the absolute unsigned value of a signed value.
*/
function abs(int256 n) internal pure returns (uint256) {
unchecked {
// must be unchecked in order to support `n = type(int256).min`
return uint256(n >= 0 ? n : -n);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}
// 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 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 (last updated v4.9.0) (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 // Deprecated in v4.8
}
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");
}
}
/**
* @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 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 message) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, "\x19Ethereum Signed Message:\n32")
mstore(0x1c, hash)
message := keccak256(0x00, 0x3c)
}
}
/**
* @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 data) {
/// @solidity memory-safe-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, "\x19\x01")
mstore(add(ptr, 0x02), domainSeparator)
mstore(add(ptr, 0x22), structHash)
data := keccak256(ptr, 0x42)
}
}
/**
* @dev Returns an Ethereum Signed Data with intended validator, created from a
* `validator` and `data` according to the version 0 of EIP-191.
*
* See {recover}.
*/
function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x00", validator, data));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
import "./math/Math.sol";
import "./math/SignedMath.sol";
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _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) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `int256` to its ASCII `string` decimal representation.
*/
function toString(int256 value) internal pure returns (string memory) {
return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMath.abs(value))));
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @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] = _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);
}
/**
* @dev Returns true if the two strings are equal.
*/
function equal(string memory a, string memory b) internal pure returns (bool) {
return keccak256(bytes(a)) == keccak256(bytes(b));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
*/
library Counters {
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (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;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or 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 {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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 (last updated v4.9.0) (token/common/ERC2981.sol)
pragma solidity ^0.8.0;
import "../../interfaces/IERC2981.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of the NFT Royalty Standard, a standardized way to retrieve royalty payment information.
*
* Royalty information can be specified globally for all token ids via {_setDefaultRoyalty}, and/or individually for
* specific token ids via {_setTokenRoyalty}. The latter takes precedence over the first.
*
* Royalty is specified as a fraction of sale price. {_feeDenominator} is overridable but defaults to 10000, meaning the
* fee is specified in basis points by default.
*
* IMPORTANT: ERC-2981 only specifies a way to signal royalty information and does not enforce its payment. See
* https://eips.ethereum.org/EIPS/eip-2981#optional-royalty-payments[Rationale] in the EIP. Marketplaces are expected to
* voluntarily pay royalties together with sales, but note that this standard is not yet widely supported.
*
* _Available since v4.5._
*/
abstract contract ERC2981 is IERC2981, ERC165 {
struct RoyaltyInfo {
address receiver;
uint96 royaltyFraction;
}
RoyaltyInfo private _defaultRoyaltyInfo;
mapping(uint256 => RoyaltyInfo) private _tokenRoyaltyInfo;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC165) returns (bool) {
return interfaceId == type(IERC2981).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @inheritdoc IERC2981
*/
function royaltyInfo(uint256 tokenId, uint256 salePrice) public view virtual override returns (address, uint256) {
RoyaltyInfo memory royalty = _tokenRoyaltyInfo[tokenId];
if (royalty.receiver == address(0)) {
royalty = _defaultRoyaltyInfo;
}
uint256 royaltyAmount = (salePrice * royalty.royaltyFraction) / _feeDenominator();
return (royalty.receiver, royaltyAmount);
}
/**
* @dev The denominator with which to interpret the fee set in {_setTokenRoyalty} and {_setDefaultRoyalty} as a
* fraction of the sale price. Defaults to 10000 so fees are expressed in basis points, but may be customized by an
* override.
*/
function _feeDenominator() internal pure virtual returns (uint96) {
return 10000;
}
/**
* @dev Sets the royalty information that all ids in this contract will default to.
*
* Requirements:
*
* - `receiver` cannot be the zero address.
* - `feeNumerator` cannot be greater than the fee denominator.
*/
function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual {
require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
require(receiver != address(0), "ERC2981: invalid receiver");
_defaultRoyaltyInfo = RoyaltyInfo(receiver, feeNumerator);
}
/**
* @dev Removes default royalty information.
*/
function _deleteDefaultRoyalty() internal virtual {
delete _defaultRoyaltyInfo;
}
/**
* @dev Sets the royalty information for a specific token id, overriding the global default.
*
* Requirements:
*
* - `receiver` cannot be the zero address.
* - `feeNumerator` cannot be greater than the fee denominator.
*/
function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual {
require(feeNumerator <= _feeDenominator(), "ERC2981: royalty fee will exceed salePrice");
require(receiver != address(0), "ERC2981: Invalid parameters");
_tokenRoyaltyInfo[tokenId] = RoyaltyInfo(receiver, feeNumerator);
}
/**
* @dev Resets royalty information for the token id back to the global default.
*/
function _resetTokenRoyalty(uint256 tokenId) internal virtual {
delete _tokenRoyaltyInfo[tokenId];
}
}
// 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 v4.6.0) (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 (last updated v4.9.0) (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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* 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 v4.9.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// Mapping from token ID to approved address
mapping(uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: address zero is not a valid owner");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _ownerOf(tokenId);
require(owner != address(0), "ERC721: invalid token ID");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
_requireMinted(tokenId);
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not token owner or approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
_requireMinted(tokenId);
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
_safeTransfer(from, to, tokenId, data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
*/
function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
return _owners[tokenId];
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _ownerOf(tokenId) != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId, 1);
// Check that tokenId was not minted by `_beforeTokenTransfer` hook
require(!_exists(tokenId), "ERC721: token already minted");
unchecked {
// Will not overflow unless all 2**256 token ids are minted to the same owner.
// Given that tokens are minted one by one, it is impossible in practice that
// this ever happens. Might change if we allow batch minting.
// The ERC fails to describe this case.
_balances[to] += 1;
}
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId, 1);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
* This is an internal function that does not check if the sender is authorized to operate on the token.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId, 1);
// Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
owner = ERC721.ownerOf(tokenId);
// Clear approvals
delete _tokenApprovals[tokenId];
unchecked {
// Cannot overflow, as that would require more tokens to be burned/transferred
// out than the owner initially received through minting and transferring in.
_balances[owner] -= 1;
}
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId, 1);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId, 1);
// Check that tokenId was not transferred by `_beforeTokenTransfer` hook
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
// Clear approvals from the previous owner
delete _tokenApprovals[tokenId];
unchecked {
// `_balances[from]` cannot overflow for the same reason as described in `_burn`:
// `from`'s balance is the number of token held, which is at least one before the current
// transfer.
// `_balances[to]` could overflow in the conditions described in `_mint`. That would require
// all 2**256 token ids to be minted, which in practice is impossible.
_balances[from] -= 1;
_balances[to] += 1;
}
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId, 1);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits an {ApprovalForAll} event.
*/
function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Reverts if the `tokenId` has not been minted yet.
*/
function _requireMinted(uint256 tokenId) internal view virtual {
require(_exists(tokenId), "ERC721: invalid token ID");
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
/// @solidity memory-safe-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
* used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
* - When `from` is zero, the tokens will be minted for `to`.
* - When `to` is zero, ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
* - `batchSize` is non-zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}
/**
* @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
* used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
* - When `from` is zero, the tokens were minted for `to`.
* - When `to` is zero, ``from``'s tokens were burned.
* - `from` and `to` are never both zero.
* - `batchSize` is non-zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(address from, address to, uint256 firstTokenId, uint256 batchSize) internal virtual {}
/**
* @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
*
* WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant
* being that for any address `a` the value returned by `balanceOf(a)` must be equal to the number of tokens such
* that `ownerOf(tokenId)` is `a`.
*/
// solhint-disable-next-line func-name-mixedcase
function __unsafe_increaseBalance(address account, uint256 amount) internal {
_balances[account] += amount;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol)
pragma solidity ^0.8.0;
import "../utils/introspection/IERC165.sol";
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling 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
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/utils/Context.sol";
/**
* @title TransferValidation
* @author Limit Break, Inc.
* @notice A mix-in that can be combined with ERC-721 contracts to provide more granular hooks.
* Openzeppelin's ERC721 contract only provides hooks for before and after transfer. This allows
* developers to validate or customize transfers within the context of a mint, a burn, or a transfer.
*/
abstract contract TransferValidation is Context {
error ShouldNotMintToBurnAddress();
/// @dev Inheriting contracts should call this function in the _beforeTokenTransfer function to get more granular hooks.
function _validateBeforeTransfer(address from, address to, uint256 tokenId) internal virtual {
bool fromZeroAddress = from == address(0);
bool toZeroAddress = to == address(0);
if(fromZeroAddress && toZeroAddress) {
revert ShouldNotMintToBurnAddress();
} else if(fromZeroAddress) {
_preValidateMint(_msgSender(), to, tokenId, msg.value);
} else if(toZeroAddress) {
_preValidateBurn(_msgSender(), from, tokenId, msg.value);
} else {
_preValidateTransfer(_msgSender(), from, to, tokenId, msg.value);
}
}
/// @dev Inheriting contracts should call this function in the _afterTokenTransfer function to get more granular hooks.
function _validateAfterTransfer(address from, address to, uint256 tokenId) internal virtual {
bool fromZeroAddress = from == address(0);
bool toZeroAddress = to == address(0);
if(fromZeroAddress && toZeroAddress) {
revert ShouldNotMintToBurnAddress();
} else if(fromZeroAddress) {
_postValidateMint(_msgSender(), to, tokenId, msg.value);
} else if(toZeroAddress) {
_postValidateBurn(_msgSender(), from, tokenId, msg.value);
} else {
_postValidateTransfer(_msgSender(), from, to, tokenId, msg.value);
}
}
/// @dev Optional validation hook that fires before a mint
function _preValidateMint(address caller, address to, uint256 tokenId, uint256 value) internal virtual {}
/// @dev Optional validation hook that fires after a mint
function _postValidateMint(address caller, address to, uint256 tokenId, uint256 value) internal virtual {}
/// @dev Optional validation hook that fires before a burn
function _preValidateBurn(address caller, address from, uint256 tokenId, uint256 value) internal virtual {}
/// @dev Optional validation hook that fires after a burn
function _postValidateBurn(address caller, address from, uint256 tokenId, uint256 value) internal virtual {}
/// @dev Optional validation hook that fires before a transfer
function _preValidateTransfer(address caller, address from, address to, uint256 tokenId, uint256 value) internal virtual {}
/// @dev Optional validation hook that fires after a transfer
function _postValidateTransfer(address caller, address from, address to, uint256 tokenId, uint256 value) internal virtual {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
enum AllowlistTypes {
Operators,
PermittedContractReceivers
}
enum ReceiverConstraints {
None,
NoCode,
EOA
}
enum CallerConstraints {
None,
OperatorWhitelistEnableOTC,
OperatorWhitelistDisableOTC
}
enum StakerConstraints {
None,
CallerIsTxOrigin,
EOA
}
enum TransferSecurityLevels {
Zero,
One,
Two,
Three,
Four,
Five,
Six
}
struct TransferSecurityPolicy {
CallerConstraints callerConstraints;
ReceiverConstraints receiverConstraints;
}
struct CollectionSecurityPolicy {
TransferSecurityLevels transferSecurityLevel;
uint120 operatorWhitelistId;
uint120 permittedContractReceiversId;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../access/OwnablePermissions.sol";
import "../interfaces/ICreatorToken.sol";
import "../interfaces/ICreatorTokenTransferValidator.sol";
import "../utils/TransferValidation.sol";
import "@openzeppelin/contracts/interfaces/IERC165.sol";
/**
* @title CreatorTokenBase
* @author Limit Break, Inc.
* @notice CreatorTokenBase is an abstract contract that provides basic functionality for managing token
* transfer policies through an implementation of ICreatorTokenTransferValidator. This contract is intended to be used
* as a base for creator-specific token contracts, enabling customizable transfer restrictions and security policies.
*
* <h4>Features:</h4>
* <ul>Ownable: This contract can have an owner who can set and update the transfer validator.</ul>
* <ul>TransferValidation: Implements the basic token transfer validation interface.</ul>
* <ul>ICreatorToken: Implements the interface for creator tokens, providing view functions for token security policies.</ul>
*
* <h4>Benefits:</h4>
* <ul>Provides a flexible and modular way to implement custom token transfer restrictions and security policies.</ul>
* <ul>Allows creators to enforce policies such as whitelisted operators and permitted contract receivers.</ul>
* <ul>Can be easily integrated into other token contracts as a base contract.</ul>
*
* <h4>Intended Usage:</h4>
* <ul>Use as a base contract for creator token implementations that require advanced transfer restrictions and
* security policies.</ul>
* <ul>Set and update the ICreatorTokenTransferValidator implementation contract to enforce desired policies for the
* creator token.</ul>
*/
abstract contract CreatorTokenBase is OwnablePermissions, TransferValidation, ICreatorToken {
error CreatorTokenBase__InvalidTransferValidatorContract();
error CreatorTokenBase__SetTransferValidatorFirst();
address public constant DEFAULT_TRANSFER_VALIDATOR = address(0x0000721C310194CcfC01E523fc93C9cCcFa2A0Ac);
TransferSecurityLevels public constant DEFAULT_TRANSFER_SECURITY_LEVEL = TransferSecurityLevels.One;
uint120 public constant DEFAULT_OPERATOR_WHITELIST_ID = uint120(1);
ICreatorTokenTransferValidator private transferValidator;
/**
* @notice Allows the contract owner to set the transfer validator to the official validator contract
* and set the security policy to the recommended default settings.
* @dev May be overridden to change the default behavior of an individual collection.
*/
function setToDefaultSecurityPolicy() public virtual {
_requireCallerIsContractOwner();
setTransferValidator(DEFAULT_TRANSFER_VALIDATOR);
ICreatorTokenTransferValidator(DEFAULT_TRANSFER_VALIDATOR).setTransferSecurityLevelOfCollection(address(this), DEFAULT_TRANSFER_SECURITY_LEVEL);
ICreatorTokenTransferValidator(DEFAULT_TRANSFER_VALIDATOR).setOperatorWhitelistOfCollection(address(this), DEFAULT_OPERATOR_WHITELIST_ID);
}
/**
* @notice Allows the contract owner to set the transfer validator to a custom validator contract
* and set the security policy to their own custom settings.
*/
function setToCustomValidatorAndSecurityPolicy(
address validator,
TransferSecurityLevels level,
uint120 operatorWhitelistId,
uint120 permittedContractReceiversAllowlistId) public {
_requireCallerIsContractOwner();
setTransferValidator(validator);
ICreatorTokenTransferValidator(validator).
setTransferSecurityLevelOfCollection(address(this), level);
ICreatorTokenTransferValidator(validator).
setOperatorWhitelistOfCollection(address(this), operatorWhitelistId);
ICreatorTokenTransferValidator(validator).
setPermittedContractReceiverAllowlistOfCollection(address(this), permittedContractReceiversAllowlistId);
}
/**
* @notice Allows the contract owner to set the security policy to their own custom settings.
* @dev Reverts if the transfer validator has not been set.
*/
function setToCustomSecurityPolicy(
TransferSecurityLevels level,
uint120 operatorWhitelistId,
uint120 permittedContractReceiversAllowlistId) public {
_requireCallerIsContractOwner();
ICreatorTokenTransferValidator validator = getTransferValidator();
if (address(validator) == address(0)) {
revert CreatorTokenBase__SetTransferValidatorFirst();
}
validator.setTransferSecurityLevelOfCollection(address(this), level);
validator.setOperatorWhitelistOfCollection(address(this), operatorWhitelistId);
validator.setPermittedContractReceiverAllowlistOfCollection(address(this), permittedContractReceiversAllowlistId);
}
/**
* @notice Sets the transfer validator for the token contract.
*
* @dev Throws when provided validator contract is not the zero address and doesn't support
* the ICreatorTokenTransferValidator interface.
* @dev Throws when the caller is not the contract owner.
*
* @dev <h4>Postconditions:</h4>
* 1. The transferValidator address is updated.
* 2. The `TransferValidatorUpdated` event is emitted.
*
* @param transferValidator_ The address of the transfer validator contract.
*/
function setTransferValidator(address transferValidator_) public {
_requireCallerIsContractOwner();
bool isValidTransferValidator = false;
if(transferValidator_.code.length > 0) {
try IERC165(transferValidator_).supportsInterface(type(ICreatorTokenTransferValidator).interfaceId)
returns (bool supportsInterface) {
isValidTransferValidator = supportsInterface;
} catch {}
}
if(transferValidator_ != address(0) && !isValidTransferValidator) {
revert CreatorTokenBase__InvalidTransferValidatorContract();
}
emit TransferValidatorUpdated(address(transferValidator), transferValidator_);
transferValidator = ICreatorTokenTransferValidator(transferValidator_);
}
/**
* @notice Returns the transfer validator contract address for this token contract.
*/
function getTransferValidator() public view override returns (ICreatorTokenTransferValidator) {
return transferValidator;
}
/**
* @notice Returns the security policy for this token contract, which includes:
* Transfer security level, operator whitelist id, permitted contract receiver allowlist id.
*/
function getSecurityPolicy() public view override returns (CollectionSecurityPolicy memory) {
if (address(transferValidator) != address(0)) {
return transferValidator.getCollectionSecurityPolicy(address(this));
}
return CollectionSecurityPolicy({
transferSecurityLevel: TransferSecurityLevels.Zero,
operatorWhitelistId: 0,
permittedContractReceiversId: 0
});
}
/**
* @notice Returns the list of all whitelisted operators for this token contract.
* @dev This can be an expensive call and should only be used in view-only functions.
*/
function getWhitelistedOperators() public view override returns (address[] memory) {
if (address(transferValidator) != address(0)) {
return transferValidator.getWhitelistedOperators(
transferValidator.getCollectionSecurityPolicy(address(this)).operatorWhitelistId);
}
return new address[](0);
}
/**
* @notice Returns the list of permitted contract receivers for this token contract.
* @dev This can be an expensive call and should only be used in view-only functions.
*/
function getPermittedContractReceivers() public view override returns (address[] memory) {
if (address(transferValidator) != address(0)) {
return transferValidator.getPermittedContractReceivers(
transferValidator.getCollectionSecurityPolicy(address(this)).permittedContractReceiversId);
}
return new address[](0);
}
/**
* @notice Checks if an operator is whitelisted for this token contract.
* @param operator The address of the operator to check.
*/
function isOperatorWhitelisted(address operator) public view override returns (bool) {
if (address(transferValidator) != address(0)) {
return transferValidator.isOperatorWhitelisted(
transferValidator.getCollectionSecurityPolicy(address(this)).operatorWhitelistId, operator);
}
return false;
}
/**
* @notice Checks if a contract receiver is permitted for this token contract.
* @param receiver The address of the receiver to check.
*/
function isContractReceiverPermitted(address receiver) public view override returns (bool) {
if (address(transferValidator) != address(0)) {
return transferValidator.isContractReceiverPermitted(
transferValidator.getCollectionSecurityPolicy(address(this)).permittedContractReceiversId, receiver);
}
return false;
}
/**
* @notice Determines if a transfer is allowed based on the token contract's security policy. Use this function
* to simulate whether or not a transfer made by the specified `caller` from the `from` address to the `to`
* address would be allowed by this token's security policy.
*
* @notice This function only checks the security policy restrictions and does not check whether token ownership
* or approvals are in place.
*
* @param caller The address of the simulated caller.
* @param from The address of the sender.
* @param to The address of the receiver.
* @return True if the transfer is allowed, false otherwise.
*/
function isTransferAllowed(address caller, address from, address to) public view override returns (bool) {
if (address(transferValidator) != address(0)) {
try transferValidator.applyCollectionTransferPolicy(caller, from, to) {
return true;
} catch {
return false;
}
}
return true;
}
/**
* @dev Pre-validates a token transfer, reverting if the transfer is not allowed by this token's security policy.
* Inheriting contracts are responsible for overriding the _beforeTokenTransfer function, or its equivalent
* and calling _validateBeforeTransfer so that checks can be properly applied during token transfers.
*
* @dev Throws when the transfer doesn't comply with the collection's transfer policy, if the transferValidator is
* set to a non-zero address.
*
* @param caller The address of the caller.
* @param from The address of the sender.
* @param to The address of the receiver.
*/
function _preValidateTransfer(
address caller,
address from,
address to,
uint256 /*tokenId*/,
uint256 /*value*/) internal virtual override {
if (address(transferValidator) != address(0)) {
transferValidator.applyCollectionTransferPolicy(caller, from, to);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../../access/OwnablePermissions.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
abstract contract ERC721OpenZeppelinBase is ERC721 {
// Token name
string internal _contractName;
// Token symbol
string internal _contractSymbol;
function name() public view virtual override returns (string memory) {
return _contractName;
}
function symbol() public view virtual override returns (string memory) {
return _contractSymbol;
}
function _setNameAndSymbol(string memory name_, string memory symbol_) internal {
_contractName = name_;
_contractSymbol = symbol_;
}
}
abstract contract ERC721OpenZeppelin is ERC721OpenZeppelinBase {
constructor(string memory name_, string memory symbol_) ERC721("", "") {
_setNameAndSymbol(name_, symbol_);
}
}
abstract contract ERC721OpenZeppelinInitializable is OwnablePermissions, ERC721OpenZeppelinBase {
error ERC721OpenZeppelinInitializable__AlreadyInitializedERC721();
/// @notice Specifies whether or not the contract is initialized
bool private _erc721Initialized;
/// @dev Initializes parameters of ERC721 tokens.
/// These cannot be set in the constructor because this contract is optionally compatible with EIP-1167.
function initializeERC721(string memory name_, string memory symbol_) public {
_requireCallerIsContractOwner();
if(_erc721Initialized) {
revert ERC721OpenZeppelinInitializable__AlreadyInitializedERC721();
}
_erc721Initialized = true;
_setNameAndSymbol(name_, symbol_);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/token/common/ERC2981.sol";
/**
* @title BasicRoyaltiesBase
* @author Limit Break, Inc.
* @dev Base functionality of an NFT mix-in contract implementing the most basic form of programmable royalties.
*/
abstract contract BasicRoyaltiesBase is ERC2981 {
event DefaultRoyaltySet(address indexed receiver, uint96 feeNumerator);
event TokenRoyaltySet(uint256 indexed tokenId, address indexed receiver, uint96 feeNumerator);
function _setDefaultRoyalty(address receiver, uint96 feeNumerator) internal virtual override {
super._setDefaultRoyalty(receiver, feeNumerator);
emit DefaultRoyaltySet(receiver, feeNumerator);
}
function _setTokenRoyalty(uint256 tokenId, address receiver, uint96 feeNumerator) internal virtual override {
super._setTokenRoyalty(tokenId, receiver, feeNumerator);
emit TokenRoyaltySet(tokenId, receiver, feeNumerator);
}
}
/**
* @title BasicRoyalties
* @author Limit Break, Inc.
* @notice Constructable BasicRoyalties Contract implementation.
*/
abstract contract BasicRoyalties is BasicRoyaltiesBase {
constructor(address receiver, uint96 feeNumerator) {
_setDefaultRoyalty(receiver, feeNumerator);
}
}
/**
* @title BasicRoyaltiesInitializable
* @author Limit Break, Inc.
* @notice Initializable BasicRoyalties Contract implementation to allow for EIP-1167 clones.
*/
abstract contract BasicRoyaltiesInitializable is BasicRoyaltiesBase {}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../utils/TransferPolicy.sol";
interface ITransferValidator {
function applyCollectionTransferPolicy(address caller, address from, address to) external view;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../utils/TransferPolicy.sol";
interface ITransferSecurityRegistry {
event AddedToAllowlist(AllowlistTypes indexed kind, uint256 indexed id, address indexed account);
event CreatedAllowlist(AllowlistTypes indexed kind, uint256 indexed id, string indexed name);
event ReassignedAllowlistOwnership(AllowlistTypes indexed kind, uint256 indexed id, address indexed newOwner);
event RemovedFromAllowlist(AllowlistTypes indexed kind, uint256 indexed id, address indexed account);
event SetAllowlist(AllowlistTypes indexed kind, address indexed collection, uint120 indexed id);
event SetTransferSecurityLevel(address indexed collection, TransferSecurityLevels level);
function createOperatorWhitelist(string calldata name) external returns (uint120);
function createPermittedContractReceiverAllowlist(string calldata name) external returns (uint120);
function reassignOwnershipOfOperatorWhitelist(uint120 id, address newOwner) external;
function reassignOwnershipOfPermittedContractReceiverAllowlist(uint120 id, address newOwner) external;
function renounceOwnershipOfOperatorWhitelist(uint120 id) external;
function renounceOwnershipOfPermittedContractReceiverAllowlist(uint120 id) external;
function setTransferSecurityLevelOfCollection(address collection, TransferSecurityLevels level) external;
function setOperatorWhitelistOfCollection(address collection, uint120 id) external;
function setPermittedContractReceiverAllowlistOfCollection(address collection, uint120 id) external;
function addOperatorToWhitelist(uint120 id, address operator) external;
function addPermittedContractReceiverToAllowlist(uint120 id, address receiver) external;
function removeOperatorFromWhitelist(uint120 id, address operator) external;
function removePermittedContractReceiverFromAllowlist(uint120 id, address receiver) external;
function getCollectionSecurityPolicy(address collection) external view returns (CollectionSecurityPolicy memory);
function getWhitelistedOperators(uint120 id) external view returns (address[] memory);
function getPermittedContractReceivers(uint120 id) external view returns (address[] memory);
function isOperatorWhitelisted(uint120 id, address operator) external view returns (bool);
function isContractReceiverPermitted(uint120 id, address receiver) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
interface IEOARegistry is IERC165 {
function isVerifiedEOA(address account) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "./IEOARegistry.sol";
import "./ITransferSecurityRegistry.sol";
import "./ITransferValidator.sol";
interface ICreatorTokenTransferValidator is ITransferSecurityRegistry, ITransferValidator, IEOARegistry {}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../interfaces/ICreatorTokenTransferValidator.sol";
interface ICreatorToken {
event TransferValidatorUpdated(address oldValidator, address newValidator);
function getTransferValidator() external view returns (ICreatorTokenTransferValidator);
function getSecurityPolicy() external view returns (CollectionSecurityPolicy memory);
function getWhitelistedOperators() external view returns (address[] memory);
function getPermittedContractReceivers() external view returns (address[] memory);
function isOperatorWhitelisted(address operator) external view returns (bool);
function isContractReceiverPermitted(address receiver) external view returns (bool);
function isTransferAllowed(address caller, address from, address to) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../utils/CreatorTokenBase.sol";
import "../token/erc721/ERC721OpenZeppelin.sol";
/**
* @title ERC721C
* @author Limit Break, Inc.
* @notice Extends OpenZeppelin's ERC721 implementation with Creator Token functionality, which
* allows the contract owner to update the transfer validation logic by managing a security policy in
* an external transfer validation security policy registry. See {CreatorTokenTransferValidator}.
*/
abstract contract ERC721C is ERC721OpenZeppelin, CreatorTokenBase {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(ICreatorToken).interfaceId || super.supportsInterface(interfaceId);
}
/// @dev Ties the open-zeppelin _beforeTokenTransfer hook to more granular transfer validation logic
function _beforeTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize) internal virtual override {
for (uint256 i = 0; i < batchSize;) {
_validateBeforeTransfer(from, to, firstTokenId + i);
unchecked {
++i;
}
}
}
/// @dev Ties the open-zeppelin _afterTokenTransfer hook to more granular transfer validation logic
function _afterTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize) internal virtual override {
for (uint256 i = 0; i < batchSize;) {
_validateAfterTransfer(from, to, firstTokenId + i);
unchecked {
++i;
}
}
}
}
/**
* @title ERC721CInitializable
* @author Limit Break, Inc.
* @notice Initializable implementation of ERC721C to allow for EIP-1167 proxy clones.
*/
abstract contract ERC721CInitializable is ERC721OpenZeppelinInitializable, CreatorTokenBase {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(ICreatorToken).interfaceId || super.supportsInterface(interfaceId);
}
/// @dev Ties the open-zeppelin _beforeTokenTransfer hook to more granular transfer validation logic
function _beforeTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize) internal virtual override {
for (uint256 i = 0; i < batchSize;) {
_validateBeforeTransfer(from, to, firstTokenId + i);
unchecked {
++i;
}
}
}
/// @dev Ties the open-zeppelin _afterTokenTransfer hook to more granular transfer validation logic
function _afterTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize) internal virtual override {
for (uint256 i = 0; i < batchSize;) {
_validateAfterTransfer(from, to, firstTokenId + i);
unchecked {
++i;
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "@openzeppelin/contracts/utils/Context.sol";
abstract contract OwnablePermissions is Context {
function _requireCallerIsContractOwner() internal view virtual;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "./OwnablePermissions.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
abstract contract OwnableBasic is OwnablePermissions, Ownable {
function _requireCallerIsContractOwner() internal view virtual override {
_checkOwner();
}
}