0xE8...6dfc
ZombyWorld Official NFT
ZOMBY
收藏品
收藏品
此合同的源代码已经过验证！
合同元数据
编译器
0.8.19+commit.7dd6d404
语言
Solidity
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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
}
function _throwError(RecoverError error) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert("ECDSA: invalid signature");
} else if (error == RecoverError.InvalidSignatureLength) {
revert("ECDSA: invalid signature length");
} else if (error == RecoverError.InvalidSignatureS) {
revert("ECDSA: invalid signature 's' value");
} else if (error == RecoverError.InvalidSignatureV) {
revert("ECDSA: invalid signature 'v' value");
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature` or error string. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*
* _Available since v4.3._
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
// Check the signature length
// - case 65: r,s,v signature (standard)
// - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._
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.
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 if (signature.length == 64) {
bytes32 r;
bytes32 vs;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
assembly {
r := mload(add(signature, 0x20))
vs := mload(add(signature, 0x40))
}
return tryRecover(hash, r, vs);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, signature);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address, RecoverError) {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*
* _Available since v4.2._
*/
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, r, vs);
_throwError(error);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*
* _Available since v4.3._
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS);
}
if (v != 27 && v != 28) {
return (address(0), RecoverError.InvalidSignatureV);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature);
}
return (signer, RecoverError.NoError);
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address) {
(address recovered, RecoverError error) = tryRecover(hash, v, r, s);
_throwError(error);
return recovered;
}
/**
* @dev Returns an Ethereum Signed Message, created from a `hash`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
// 32 is the length in bytes of hash,
// enforced by the type signature above
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
}
/**
* @dev Returns an Ethereum Signed Message, created from `s`. This
* produces hash corresponding to the one signed with the
* https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
* JSON-RPC method as part of EIP-191.
*
* See {recover}.
*/
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
}
/**
* @dev Returns an Ethereum Signed Typed Data, created from a
* `domainSeparator` and a `structHash`. This produces hash corresponding
* to the one signed with the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
* JSON-RPC method as part of EIP-712.
*
* See {recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
}
}
// SPDX-License-Identifier: 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 v4.5.0) (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: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _owners[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overriden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_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: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `_data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeTransfer(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _owners[tokenId] != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal virtual {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
/**
* @dev Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
_balances[owner] -= 1;
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {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 Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, ``from``'s `tokenId` will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual {}
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "@chainlink/contracts/src/v0.8/interfaces/VRFCoordinatorV2Interface.sol";
import "@chainlink/contracts/src/v0.8/VRFConsumerBaseV2.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
/**
* MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNX0OOkxxddddddxxkOO0XNWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNKkdoodddooddxxkkkkkkxxddoodddooxkKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMMMMMMMWXkdooooxOKNWMMMMMMMMMMMMMMMMMMMMWNKOxoooodkKWMMMMMMMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMMMMNOooookKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKkooookNMMMMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMXkoloxKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXkolokXMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMNOoloONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNOoloONMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMXxllkXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMXxllxXMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMXxcl0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0ocdXMMMMMMMMMMMMMM
* MMMMMMMMMMMWNxco0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKo:xNMMMMMMMMMMMM
* MMMMMMMMMMWOcc0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0ccOWMMMMMMMMMM
* MMMMMMMMMXd:xNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNx:dXWMMMMMMMM
* MMMMMMMM0clKMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKk0WMMMMMMMKlc0MMMMMMMM
* MMMMMMWO:dNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNOo;. .xWMMMMMMMNd:OWMMMMMM
* MMMMMWk;xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKxc' .dNMMMMMMMWx;kWMMMMM
* MMMMWx;xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNOo;. .oXMMMMMMMWx;xWMMMM
* MMMWO;dWMMMMMMMMMMWkc:::::::::::::::::::::::::::::::::::::::::::::' cXMMMMMMMWd;OMMMM
* MWMK:lNMMMMMMMMMMNo. :XMMMMMMMNl:KMMM
* MMNl:XMMMMMMMMMMXc .;lONMMMMMMMMK:lNMM
* MMk;xMMMMMMMMMMK: 'cxKWMMMMMMMMMMMMx;kMM
* MNccNMMMMMMMMM0, .;oONMMMMMMMMMMMMMMMMNccNM
* MO;dMMMMMMMMMMK; 'cxKWMMMMMMMMMMMMMMMMMMMMx;OM
* Md;0MMMMMMMMMMMK: ':::::::::augminted labs, llc:::::::::oolONMMMMMMMMMMMMMMMMMMMMMMMM0;dM
* Wl:NMMMMMMMMMMMMXc .xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWMMMMMMMMMMMMMMMMMMMMMMMMMMX:lW
* N:lWMMMMMMMMMMMMMNo. cNMWk:::::::::::::::ckXNMMXd:::::::::::::cOWMMMMMMMMMMMMMMMMMMMMMMMMWc:N
* X:lWMMMMMMMMMMMMMMNd. .OMM0' :KMMWK; .lXMMMMMMMMMMMMMMMMMMMMMMMMMWl:X
* X:lWMMMMMMMMMMMMMMMWx. lWMNl .oNMMWk' .xNMMMMMMMMMMMMMMMMMMMMMMMMMMWl:N
* NccNMMMMMMMMMMMMMMMMWO' ,0MMk. 'kWMNXd. ,OWMMMMMMMMMMMMMMMMMMMMMMMMMMMNccN
* Mo;KMMMMMMMMMMMMMMMMMM0, .dWMX: ;0WMKc. :KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK:oM
* Mx;kMMMMMMMMMMMMMMMMMMMK:cXMWk. .lXMW0, .oNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMk;xM
* MK:oWMMMMMMMMMMMMMMMMMMMNNMMWXOdoc;'. .xNWWx. .xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWo:KM
* MWd:0MMMMMMMMMMMMMMMMMMMMMN00XNMMMWNX0kdo0WMXo. ;0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM0;oWM
* MMK:lWMMMMMMMMMMMMMMMMMMMMNx'.';coxO0XWMMMMK: cXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWo:KMM
* MMWx;kMMMMMMMMMMMMMMMMMMMMMWk. ..,:coo' .dNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMk;xMMM
* MMMNo:KMMMMMMMMMMMMMMMMMMMMMWO' 'OWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMK:oWMMM
* MMMMXccKMMMMMMMMMMMMMMMMMMMMMW0, :KMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMKccXMMMM
* MMMMMXccKMMMMMMMMMMMMMMMMMMMMMMK: .oXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMXccXMMMMM
* MMMMMMXccKMMMMMMMMMMMMMMMMMMMMMMXc .xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMKclXMMMMMM
* MMMMMMMNo:OWMMMMMMMMMMMMMMMMMMMMMNo. ,0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWO:oNMMMMMMM
* MMMMMMMMWk:dNMMMMMMMMMMMMMMMMMMMMMWd. .cXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMXd:kWMMMMMMMM
* MMMMMMMMMMKlcOWMMMMMMMMMMMMMMMMMMMMWx' .dXNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWOclKMMMMMMMMMM
* MMMMMMMMMMMWkcl0WMMMMMMMMMMMMMMMMMMMWKOOOOOOOOOOKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0lckWMMMMMMMMMMM
* MMMMMMMMMMMMMNxco0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0ocxXMMMMMMMMMMMMM
* MMMMMMMMMMMMMWMXxclONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNOlcxXMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMNklldKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKdlokNMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMWKdlld0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKdlldKWMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMMW0doookKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKkoood0WMMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMMMMMWXkdoooxOKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXOxooodkXWMMMMMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXOxooooddkO0KXNWWWMMMMMWWNXK0OxdoddooxOXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNKOkxdooddddddddddddddoodxkOKNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
* MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWWNXXXXXXNWWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
* @title Base contract for standard ERC721 token drops
* @author Augminted Labs, LLC
* @notice Contract has been optimized for fairness and security
*/
contract ERC721Base is ERC721, Ownable, ReentrancyGuard, VRFConsumerBaseV2 {
using ECDSA for bytes32;
VRFCoordinatorV2Interface internal immutable COORDINATOR;
uint256 internal _tokenOffset;
string internal _provenanceHash;
struct VrfRequestConfig {
bytes32 keyHash;
uint64 subId;
uint32 callbackGasLimit;
uint16 requestConfirmations;
}
VrfRequestConfig public vrfRequestConfig;
struct Metadata {
string baseURI;
string collectionURI;
string placeholderURI;
}
Metadata public metadata;
uint256 public immutable MAX_SUPPLY;
uint256 public totalSupply;
uint256 public mintPrice;
uint256 public maxPerAddress;
address public signer;
bool public revealed;
bool public saleActive;
mapping(address => uint256) public addressMinted;
mapping(bytes4 => bool) public functionLocked;
constructor(
string memory name,
string memory symbol,
uint256 maxSupply,
address vrfCoordinator
)
ERC721(name, symbol)
VRFConsumerBaseV2(vrfCoordinator)
{
MAX_SUPPLY = maxSupply;
COORDINATOR = VRFCoordinatorV2Interface(vrfCoordinator);
}
/**
* @notice Modifier applied to functions that will be disabled when they're no longer needed
*/
modifier lockable() {
require(!functionLocked[msg.sig], "Function is locked");
_;
}
/**
* @notice Return token metadata
* @param tokenId To return metadata for
* @return Token URI for the specified token
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
return revealed ? ERC721.tokenURI(tokenId) : metadata.placeholderURI;
}
/**
* @notice Override ERC721 _baseURI function to use base URI pattern
*/
function _baseURI() internal view virtual override returns (string memory) {
return metadata.baseURI;
}
/**
* @notice Token offset is added to the token ID (wrapped on overflow) to get metadata asset index
*/
function tokenOffset() public view returns (uint256) {
require(_tokenOffset != 0, "Offset is not set");
return _tokenOffset;
}
/**
* @notice Provenance hash is used as proof that token metadata has not been modified
*/
function provenanceHash() public view returns (string memory) {
require(bytes(_provenanceHash).length != 0, "Provenance hash is not set");
return _provenanceHash;
}
/**
* @notice Lock individual functions that are no longer needed. WARNING: THIS CANNOT BE UNDONE
* @dev Only affects functions with the lockable modifier
* @param id First 4 bytes of the calldata (i.e. function identifier)
*/
function lockFunction(bytes4 id) public onlyOwner {
functionLocked[id] = true;
}
/**
* @notice Set token offset using Chainlink VRF
* @dev Provenance hash must already be set
*/
function setTokenOffset() public onlyOwner {
require(_tokenOffset == 0, "Offset is already set");
provenanceHash(); // require provenance hash is set
COORDINATOR.requestRandomWords(
vrfRequestConfig.keyHash,
vrfRequestConfig.subId,
vrfRequestConfig.requestConfirmations,
vrfRequestConfig.callbackGasLimit,
1 // number of random words
);
}
/**
* @notice Callback function for Chainlink VRF request randomness call
* @dev Maximum offset value is the maximum token ID (MAX_SUPPLY - 1)
*/
function fulfillRandomWords(uint256 requestId, uint256[] memory randomWords) internal override {
_tokenOffset = randomWords[0] % MAX_SUPPLY;
}
/**
* @notice Set provenance hash
* @dev Can only be set before the token offset is generated
* @param hash Metadata proof string
*/
function setProvenanceHash(string memory hash) public onlyOwner {
require(_tokenOffset == 0, "Cannot set provenance hash after token offset is set");
_provenanceHash = hash;
}
/**
* @notice Set configuration data for Chainlink VRF
* @param _vrfRequestConfig Struct with updated configuration values
*/
function setVrfRequestConfig(VrfRequestConfig memory _vrfRequestConfig) public onlyOwner {
vrfRequestConfig = _vrfRequestConfig;
}
/**
* @notice Set metadata information
* @param _metadata Struct with updated metadata values
*/
function setMetadata(Metadata calldata _metadata) public lockable onlyOwner {
metadata = _metadata;
}
/**
* @notice Set mint price
* @param _mintPrice Amount to pay for a single token
*/
function setMintPrice(uint256 _mintPrice) public lockable onlyOwner {
mintPrice = _mintPrice;
}
/**
* @notice Set maximum number of tokens per address
* @param _maxPerAddress Maximum number of tokens a single address can mint
*/
function setMaxPerAddress(uint256 _maxPerAddress) public lockable onlyOwner {
require(_maxPerAddress > 0, "Max per address must be greater than zero");
maxPerAddress = _maxPerAddress;
}
/**
* @notice Set signature signing address
* @param _signer Address of account used to create mint signatures
*/
function setSigner(address _signer) public onlyOwner {
signer = _signer;
}
/**
* @notice Flip token metadata to revealed
* @dev Can only be revealed after token offset has been set
*/
function flipRevealed() public lockable onlyOwner {
require(_tokenOffset != 0, "Offset is not set");
revealed = !revealed;
}
/**
* @notice Flip state of the token sale
*/
function flipSaleActive() public lockable onlyOwner {
saleActive = !saleActive;
}
/**
* @notice Mint the specified number of token using a signature
* @param amount Of tokens to mint
* @param signature Ethereum signed message of transaction sender's address, created by signer
*/
function mint(uint256 amount, bytes memory signature) public virtual payable nonReentrant {
require(saleActive, "Sale is not active");
require(totalSupply + amount <= MAX_SUPPLY, "Insufficient supply");
require(msg.value == mintPrice * amount, "Invalid Ether amount sent");
require(addressMinted[_msgSender()] + amount <= maxPerAddress, "Insufficient mints available");
require(signer == ECDSA.recover(
ECDSA.toEthSignedMessageHash(keccak256(abi.encodePacked(_msgSender()))),
signature
), "Invalid signature");
for (uint256 i = 0; i < amount; i++) {
_safeMint(_msgSender(), totalSupply);
totalSupply += 1;
}
addressMinted[_msgSender()] += amount;
}
/**
* @notice Permanently commit the state of the mint configuration. WARNING: THIS CANNOT BE UNDONE
*/
function commitMintConfig() external {
lockFunction(this.setMintPrice.selector);
lockFunction(this.setMaxPerAddress.selector);
}
/**
* @notice Permanently commit the state of the metadata information. WARNING: THIS CANNOT BE UNDONE
* @dev Metadata should be migrated to a decentralized and, ideally, permanent storage solution
*/
function commitMetadata() external {
require(revealed, "Metadata must be revealed");
lockFunction(this.setMetadata.selector);
lockFunction(this.flipRevealed.selector);
}
/**
* @notice Withdraw all ETH transferred to the contract
*/
function withdraw() external onlyOwner {
Address.sendValue(payable(_msgSender()), address(this).balance);
}
}// 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 (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`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// SPDX-License-Identifier: MIT
// 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 v4.4.1 (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 `IERC721.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _HEX_SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/** ****************************************************************************
* @notice Interface for contracts using VRF randomness
* *****************************************************************************
* @dev PURPOSE
*
* @dev Reggie the Random Oracle (not his real job) wants to provide randomness
* @dev to Vera the verifier in such a way that Vera can be sure he's not
* @dev making his output up to suit himself. Reggie provides Vera a public key
* @dev to which he knows the secret key. Each time Vera provides a seed to
* @dev Reggie, he gives back a value which is computed completely
* @dev deterministically from the seed and the secret key.
*
* @dev Reggie provides a proof by which Vera can verify that the output was
* @dev correctly computed once Reggie tells it to her, but without that proof,
* @dev the output is indistinguishable to her from a uniform random sample
* @dev from the output space.
*
* @dev The purpose of this contract is to make it easy for unrelated contracts
* @dev to talk to Vera the verifier about the work Reggie is doing, to provide
* @dev simple access to a verifiable source of randomness. It ensures 2 things:
* @dev 1. The fulfillment came from the VRFCoordinator
* @dev 2. The consumer contract implements fulfillRandomWords.
* *****************************************************************************
* @dev USAGE
*
* @dev Calling contracts must inherit from VRFConsumerBase, and can
* @dev initialize VRFConsumerBase's attributes in their constructor as
* @dev shown:
*
* @dev contract VRFConsumer {
* @dev constructor(<other arguments>, address _vrfCoordinator, address _link)
* @dev VRFConsumerBase(_vrfCoordinator) public {
* @dev <initialization with other arguments goes here>
* @dev }
* @dev }
*
* @dev The oracle will have given you an ID for the VRF keypair they have
* @dev committed to (let's call it keyHash). Create subscription, fund it
* @dev and your consumer contract as a consumer of it (see VRFCoordinatorInterface
* @dev subscription management functions).
* @dev Call requestRandomWords(keyHash, subId, minimumRequestConfirmations,
* @dev callbackGasLimit, numWords),
* @dev see (VRFCoordinatorInterface for a description of the arguments).
*
* @dev Once the VRFCoordinator has received and validated the oracle's response
* @dev to your request, it will call your contract's fulfillRandomWords method.
*
* @dev The randomness argument to fulfillRandomWords is a set of random words
* @dev generated from your requestId and the blockHash of the request.
*
* @dev If your contract could have concurrent requests open, you can use the
* @dev requestId returned from requestRandomWords to track which response is associated
* @dev with which randomness request.
* @dev See "SECURITY CONSIDERATIONS" for principles to keep in mind,
* @dev if your contract could have multiple requests in flight simultaneously.
*
* @dev Colliding `requestId`s are cryptographically impossible as long as seeds
* @dev differ.
*
* *****************************************************************************
* @dev SECURITY CONSIDERATIONS
*
* @dev A method with the ability to call your fulfillRandomness method directly
* @dev could spoof a VRF response with any random value, so it's critical that
* @dev it cannot be directly called by anything other than this base contract
* @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method).
*
* @dev For your users to trust that your contract's random behavior is free
* @dev from malicious interference, it's best if you can write it so that all
* @dev behaviors implied by a VRF response are executed *during* your
* @dev fulfillRandomness method. If your contract must store the response (or
* @dev anything derived from it) and use it later, you must ensure that any
* @dev user-significant behavior which depends on that stored value cannot be
* @dev manipulated by a subsequent VRF request.
*
* @dev Similarly, both miners and the VRF oracle itself have some influence
* @dev over the order in which VRF responses appear on the blockchain, so if
* @dev your contract could have multiple VRF requests in flight simultaneously,
* @dev you must ensure that the order in which the VRF responses arrive cannot
* @dev be used to manipulate your contract's user-significant behavior.
*
* @dev Since the block hash of the block which contains the requestRandomness
* @dev call is mixed into the input to the VRF *last*, a sufficiently powerful
* @dev miner could, in principle, fork the blockchain to evict the block
* @dev containing the request, forcing the request to be included in a
* @dev different block with a different hash, and therefore a different input
* @dev to the VRF. However, such an attack would incur a substantial economic
* @dev cost. This cost scales with the number of blocks the VRF oracle waits
* @dev until it calls responds to a request. It is for this reason that
* @dev that you can signal to an oracle you'd like them to wait longer before
* @dev responding to the request (however this is not enforced in the contract
* @dev and so remains effective only in the case of unmodified oracle software).
*/
abstract contract VRFConsumerBaseV2 {
error OnlyCoordinatorCanFulfill(address have, address want);
address private immutable vrfCoordinator;
/**
* @param _vrfCoordinator address of VRFCoordinator contract
*/
constructor(address _vrfCoordinator) {
vrfCoordinator = _vrfCoordinator;
}
/**
* @notice fulfillRandomness handles the VRF response. Your contract must
* @notice implement it. See "SECURITY CONSIDERATIONS" above for important
* @notice principles to keep in mind when implementing your fulfillRandomness
* @notice method.
*
* @dev VRFConsumerBaseV2 expects its subcontracts to have a method with this
* @dev signature, and will call it once it has verified the proof
* @dev associated with the randomness. (It is triggered via a call to
* @dev rawFulfillRandomness, below.)
*
* @param requestId The Id initially returned by requestRandomness
* @param randomWords the VRF output expanded to the requested number of words
*/
function fulfillRandomWords(uint256 requestId, uint256[] memory randomWords) internal virtual;
// rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF
// proof. rawFulfillRandomness then calls fulfillRandomness, after validating
// the origin of the call
function rawFulfillRandomWords(uint256 requestId, uint256[] memory randomWords) external {
if (msg.sender != vrfCoordinator) {
revert OnlyCoordinatorCanFulfill(msg.sender, vrfCoordinator);
}
fulfillRandomWords(requestId, randomWords);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface VRFCoordinatorV2Interface {
/**
* @notice Get configuration relevant for making requests
* @return minimumRequestConfirmations global min for request confirmations
* @return maxGasLimit global max for request gas limit
* @return s_provingKeyHashes list of registered key hashes
*/
function getRequestConfig()
external
view
returns (
uint16,
uint32,
bytes32[] memory
);
/**
* @notice Request a set of random words.
* @param keyHash - Corresponds to a particular oracle job which uses
* that key for generating the VRF proof. Different keyHash's have different gas price
* ceilings, so you can select a specific one to bound your maximum per request cost.
* @param subId - The ID of the VRF subscription. Must be funded
* with the minimum subscription balance required for the selected keyHash.
* @param minimumRequestConfirmations - How many blocks you'd like the
* oracle to wait before responding to the request. See SECURITY CONSIDERATIONS
* for why you may want to request more. The acceptable range is
* [minimumRequestBlockConfirmations, 200].
* @param callbackGasLimit - How much gas you'd like to receive in your
* fulfillRandomWords callback. Note that gasleft() inside fulfillRandomWords
* may be slightly less than this amount because of gas used calling the function
* (argument decoding etc.), so you may need to request slightly more than you expect
* to have inside fulfillRandomWords. The acceptable range is
* [0, maxGasLimit]
* @param numWords - The number of uint256 random values you'd like to receive
* in your fulfillRandomWords callback. Note these numbers are expanded in a
* secure way by the VRFCoordinator from a single random value supplied by the oracle.
* @return requestId - A unique identifier of the request. Can be used to match
* a request to a response in fulfillRandomWords.
*/
function requestRandomWords(
bytes32 keyHash,
uint64 subId,
uint16 minimumRequestConfirmations,
uint32 callbackGasLimit,
uint32 numWords
) external returns (uint256 requestId);
/**
* @notice Create a VRF subscription.
* @return subId - A unique subscription id.
* @dev You can manage the consumer set dynamically with addConsumer/removeConsumer.
* @dev Note to fund the subscription, use transferAndCall. For example
* @dev LINKTOKEN.transferAndCall(
* @dev address(COORDINATOR),
* @dev amount,
* @dev abi.encode(subId));
*/
function createSubscription() external returns (uint64 subId);
/**
* @notice Get a VRF subscription.
* @param subId - ID of the subscription
* @return balance - LINK balance of the subscription in juels.
* @return reqCount - number of requests for this subscription, determines fee tier.
* @return owner - owner of the subscription.
* @return consumers - list of consumer address which are able to use this subscription.
*/
function getSubscription(uint64 subId)
external
view
returns (
uint96 balance,
uint64 reqCount,
address owner,
address[] memory consumers
);
/**
* @notice Request subscription owner transfer.
* @param subId - ID of the subscription
* @param newOwner - proposed new owner of the subscription
*/
function requestSubscriptionOwnerTransfer(uint64 subId, address newOwner) external;
/**
* @notice Request subscription owner transfer.
* @param subId - ID of the subscription
* @dev will revert if original owner of subId has
* not requested that msg.sender become the new owner.
*/
function acceptSubscriptionOwnerTransfer(uint64 subId) external;
/**
* @notice Add a consumer to a VRF subscription.
* @param subId - ID of the subscription
* @param consumer - New consumer which can use the subscription
*/
function addConsumer(uint64 subId, address consumer) external;
/**
* @notice Remove a consumer from a VRF subscription.
* @param subId - ID of the subscription
* @param consumer - Consumer to remove from the subscription
*/
function removeConsumer(uint64 subId, address consumer) external;
/**
* @notice Cancel a subscription
* @param subId - ID of the subscription
* @param to - Where to send the remaining LINK to
*/
function cancelSubscription(uint64 subId, address to) external;
}
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;
import "../Augminted/ERC721Base.sol";
/**
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,''...... .......'',,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'''.... .,:ccc:;,'.. ....'',,,,,,,,,,,,,,,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,''.... .:xO0NWMMMMWWNX0koc,. ...'',,,,,,,,,,,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'... .':cc..;xXWMMMMMMMMMMMMMMMNX0Oxl;. ...'',,,,,,,,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,''... .:ONWMKxkNMMMMMMMMMMMMMMMMNx,..';lxOd:. ...'',,,,,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,'... .,l0WMMMMMMMMMMMMMMMMMMMMMMMMO. .lXMWKx:. ..',,,,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,''.. .;o0NMMMMMMMMMMMMMMMMMMMMMMMMMMMKdcc:cdkkdlcclooc,. ..'',,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,'.. .cxKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0oxXWXx:' 'ldc. ..',,,,,,,,,,,
* ,,,,,,,,,,',,,,,,'.. .:kXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWO,.,kk, cK0l. ..',,,,,,,,,
* ,,,,,,,,,,',,,,'.. .l0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKkOKk' .kMWKl. ..',,,,,,,
* ,,,,,,,,,,,,,''. .cOKXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMO, .,dXMMMW0, ..',,,,,
* ,,,,,,,,,,,',.. ,oxOXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKkoc;,,;:coxOKNMMMMMMWk, .',,,,
* ,,,,,,,,,,,'.. .,oONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWNWWWMMMMMMMMMMMMMMXx;. ..',,
* ,,,,,,,,,''.. .cONMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNOc. .',
* ,,,,,,,,,,.. .:0WMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMW0:. .'
* ,,,,,,,,,'. .oNMWNWMWXNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNx. .
* ,,,,,,,,'. cXMNx;;c,.;kNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWk.
* ,,,,,,,,'. .kWKc. .oNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWWMMMMMMMMWO'
* ,,,,,,,,. ,KNl .xW0dKWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWWNNXK0kxdoc;:dKWMN0xo:. .
* ,,,,,,,'. cNX: :Xk'cNMMMMMMMMMMMMMMMMMMMMWWWNXXKXNMMMMMMMMNklc:;'... .lK0l' .''
* ,,,,,,,,. ;KWk' cXk,oNMMMMMMMWNXK0kxdolccc;,,'....c0MMMMMMM0;.. .oWWKc .',
* ,,,,,,,,'. .xWWKdc,.. ..lKWX0NMMMWKkoc;'.. cXMMMMMMMWXKO: :KMMWk. .',
* ,,,,''''.. 'OWWKdcokO0XWMMMMMMMNd. .xWMMMMMW0olxX0:. 'dXMMMMk. .,
* ,''... ;KWx,.,OMMMMMMMMMMMK; :XMMMMMNx. 'xXOc. .'cxXWMWMW0; .',
* '. .',;;;'...lNWNKXWMMMMMMMMMMMWd. .oXMMMMMMO' .kWWXx:..'l0WMMNkodl. ..''
* . .o0XWNNXXX0kONMMMMMMMMMMMMMMMMMWOo;,'......',. .l0WMMMMMMWx. .;'.,OWMMMWXkdx0WNk;. ..',''
* .kWMKo;'',lOXWNNWMMMMMMMMMMMMMMMMMMWNNXKKKKXNK; .:xKWMMMMMMMMMKll0WX0XWMMMMMMMMMWO:. ..'',,,,
* . '0MMKo;. .',':KMMMMMMMMMMMMMMMMMMMMMMMMMMMMNxoxkXWMMMMMMMMMMMMMWMMMMMMMMMMMMMMMKl. ..',,,,,,,
* . .dWMMMNl. cNMWXKNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWO, ..'',,,,,,,,,
* '. 'kWMMMNk:. oWWx'.:xkOO0KXWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWO' ..',,,,,,,,,,,,
* '.. .dXMMMMK: .kWK; ....';cox0XWMMMMMMMMMMMWWX0NMMMMMMMMMMMMMMMMMMMXdokkxoc. .',,,,,,,,,,,,,,
* ,''. .,dKWMWKx::kNXl. .......... ..':okXWMMMMMMMX0c.cKMWX0XWMMWWNXK0Okxo; .',,,,,,,,,,,,,,
* ,,,'.. .:dOXXXK0d, ..',,,,,,,,''... .:xKWMMMMX0l..'::'..;::;,'... .'',,,,,,,,,,,,,
* ,,,,,''.. ..''.. .',,,,,,,,,,,,,,'. ....cOWMMMWNKkc. .. .',,,,,,,,,,,,,
* ,,,,,,,'''.........',,,,,,,,,,,,,,,,,'. .od, .c0WMMMMMKooO000kxdlc;'.. ... .,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'.. .kXd. .kWMMMMMWMMMMMMMMMMWNXKx, ,lllodkKO, .',,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'. .kN0ll0WMMMMMMMMMMMMMMMMMMMMWOdKMMMMMWO, ..,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'. .xNMMMMMMMMMMMMMMMMMMMMMMMMMMWMMMMMMKl. .',,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'. .oNMMXOk0WNkodkXWMMMMMMMMMMMMMMMMMMWN0: .',,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'.. .cKWk;.'kx. 'xWMMMMMMMMMMMMMMMMMMMMx. .',,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,''. 'xKKkxXx. ,0MMMMMMMMMMMMMMMMMMMM0' .,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'.. .:dOWMO. .OMMMMMMMMMMMMMMMMMMMMK, .,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'. .c0Xd. ;KMMMMMMMMMMMMMMMMMMMMk. .',,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,''.. .:xOxdxKWMMMMMMMMMMMMMMMMMMMK; ..,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'''. 'lOXWMMMMMMMMMMMMMMMMMMNk, .',,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'''.. 'cx0NMMMMMMMMMMMMWKx;. ..',,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'... .'coxO0KK0Okdl;. ..',,,,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'''... .... ...',,,,,,,,,,,,,,,,,,
* ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,'..... ...'',,,,,,,,,,,,,,,,,,,,
* @author Augminted Labs, LLC
*/
contract ZombyWorld is ERC721Base {
uint256 public constant MAX_RESERVED = 100;
uint256 public reserved;
constructor(
address signer,
address vrfCoordinator,
bytes32 keyHash,
uint64 subId
)
ERC721Base(
"ZombyWorld",
"ZOMBY",
6669,
vrfCoordinator
)
{
setMintPrice(0.11 ether);
setMaxPerAddress(2);
setSigner(signer);
setVrfRequestConfig(VrfRequestConfig({
keyHash: keyHash,
subId: subId,
callbackGasLimit: 200000,
requestConfirmations: 20
}));
}
/**
* @notice Mint a specified amount of tokens to a specified receiver
* @param amount Of tokens to reserve
* @param receiver Of reserved tokens
*/
function reserve(uint256 amount, address receiver) external onlyOwner {
require(totalSupply + amount <= MAX_SUPPLY, "Insufficient total supply");
require(reserved + amount <= MAX_RESERVED, "Insufficient reserved supply");
for (uint256 i = 0; i < amount; i++) {
_safeMint(receiver, totalSupply);
totalSupply += 1;
}
reserved += amount;
}
}{
"compilationTarget": {
"contracts/ZombyWorld/ZombyWorld.sol": "ZombyWorld"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}[{"inputs":[{"internalType":"address","name":"signer","type":"address"},{"internalType":"address","name":"vrfCoordinator","type":"address"},{"internalType":"bytes32","name":"keyHash","type":"bytes32"},{"internalType":"uint64","name":"subId","type":"uint64"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"have","type":"address"},{"internalType":"address","name":"want","type":"address"}],"name":"OnlyCoordinatorCanFulfill","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"MAX_RESERVED","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_SUPPLY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"addressMinted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"commitMetadata","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"commitMintConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"flipRevealed","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"flipSaleActive","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"name":"functionLocked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"id","type":"bytes4"}],"name":"lockFunction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxPerAddress","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"metadata","outputs":[{"internalType":"string","name":"baseURI","type":"string"},{"internalType":"string","name":"collectionURI","type":"string"},{"internalType":"string","name":"placeholderURI","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"mintPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"provenanceHash","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"requestId","type":"uint256"},{"internalType":"uint256[]","name":"randomWords","type":"uint256[]"}],"name":"rawFulfillRandomWords","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"}],"name":"reserve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reserved","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"revealed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"saleActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxPerAddress","type":"uint256"}],"name":"setMaxPerAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"string","name":"baseURI","type":"string"},{"internalType":"string","name":"collectionURI","type":"string"},{"internalType":"string","name":"placeholderURI","type":"string"}],"internalType":"struct ERC721Base.Metadata","name":"_metadata","type":"tuple"}],"name":"setMetadata","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_mintPrice","type":"uint256"}],"name":"setMintPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"hash","type":"string"}],"name":"setProvenanceHash","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_signer","type":"address"}],"name":"setSigner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"setTokenOffset","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"keyHash","type":"bytes32"},{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"uint32","name":"callbackGasLimit","type":"uint32"},{"internalType":"uint16","name":"requestConfirmations","type":"uint16"}],"internalType":"struct ERC721Base.VrfRequestConfig","name":"_vrfRequestConfig","type":"tuple"}],"name":"setVrfRequestConfig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"signer","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenOffset","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"vrfRequestConfig","outputs":[{"internalType":"bytes32","name":"keyHash","type":"bytes32"},{"internalType":"uint64","name":"subId","type":"uint64"},{"internalType":"uint32","name":"callbackGasLimit","type":"uint32"},{"internalType":"uint16","name":"requestConfirmations","type":"uint16"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]