Contract Source Code:
File 1 of 1 : DAOBnBNFT
// Sources flattened with hardhat v2.8.4 https://hardhat.org
// File @openzeppelin/contracts/utils/[email protected]
// 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;
}
}
// File @openzeppelin/contracts/access/[email protected]
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// 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);
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @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;
}
// File @openzeppelin/contracts/token/ERC721/[email protected]
// 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);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
/**
* @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);
}
// File @openzeppelin/contracts/utils/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @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
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 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);
}
}
}
}
// File @openzeppelin/contracts/utils/[email protected]
// 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);
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @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;
}
}
// File contracts/ERC721Opt.sol
pragma solidity ^0.8.4;
error ApprovalCallerNotOwnerNorApproved();
error ApprovalQueryForNonexistentToken();
error ApproveToCaller();
error ApprovalToCurrentOwner();
error BalanceQueryForZeroAddress();
error MintToZeroAddress();
error MintToDeadAddress();
error MintZeroQuantity();
error OwnerIndexOutOfBounds();
error OwnerQueryForNonexistentToken();
error TokenIndexOutOfBounds();
error TransferCallerNotOwnerNorApproved();
error TransferFromIncorrectOwner();
error TransferToNonERC721ReceiverImplementer();
error TransferToZeroAddress();
error TransferToDeadAddress();
error UnableGetTokenOwnerByIndex();
error URIQueryForNonexistentToken();
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints.
*
* Assumes serials are sequentially minted starting at 1 (e.g. 1, 2, 3..).
*/
contract ERC721Opt is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
uint256 internal _nextTokenId = 1;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owners details
// An empty struct value does not necessarily mean the token is unowned. See ownerOf implementation for details.
mapping(uint256 => address) internal _owners;
// Mapping owner address to balances
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;
// Address to use for burned accounting
address constant DEAD_ADDR = 0x000000000000000000000000000000000000dEaD;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual returns (uint256) {
// Counter underflow is impossible as burned cannot be incremented
// more than _nextTokenId - 1 times
unchecked {
return (_nextTokenId - 1) - balanceOf(DEAD_ADDR);
}
}
/**
* @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) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address owner) {
if (!_exists(tokenId)) revert OwnerQueryForNonexistentToken();
unchecked {
for (uint256 curr = tokenId;; curr--) {
owner = _owners[curr];
if (owner != address(0)) {
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) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
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 = ownerOf(tokenId);
if (to == owner) revert ApprovalToCurrentOwner();
if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) revert ApprovalCallerNotOwnerNorApproved();
_approve(to, tokenId, owner);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
if (operator == _msgSender()) revert ApproveToCaller();
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
_transfer(from, to, tokenId);
if (!_checkOnERC721Received(from, to, tokenId, _data)) revert TransferToNonERC721ReceiverImplementer();
}
function _isApprovedOrOwner(address sender, uint256 tokenId) internal view virtual returns (bool) {
address owner = ownerOf(tokenId);
return (sender == owner ||
getApproved(tokenId) == sender ||
isApprovedForAll(owner, sender));
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return tokenId > 0 && tokenId < _nextTokenId && _owners[tokenId] != DEAD_ADDR;
}
function _mint(address to, uint256 quantity) internal virtual {
_mint(to, quantity, '', false);
}
function _safeMint(address to, uint256 quantity) internal virtual {
_safeMint(to, quantity, '');
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal virtual {
_mint(to, quantity, _data, true);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event.
*/
function _mint(
address to,
uint256 quantity,
bytes memory _data,
bool safe
) internal virtual {
uint256 startTokenId = _nextTokenId;
if (to == address(0)) revert MintToZeroAddress();
if (to == DEAD_ADDR) revert MintToDeadAddress();
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// balance overflow if current value + quantity > 1.56e77 (2**256) - 1
// updatedIndex overflows if _nextTokenId + quantity > 1.56e77 (2**256) - 1
unchecked {
_balances[to] += quantity;
_owners[startTokenId] = to;
uint256 updatedIndex = startTokenId;
for (uint256 i; i < quantity; i++) {
emit Transfer(address(0), to, updatedIndex);
if (safe) {
if (!_checkOnERC721Received(address(0), to, updatedIndex, _data)) revert TransferToNonERC721ReceiverImplementer();
}
updatedIndex++;
}
_nextTokenId = updatedIndex;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) private {
address owner = ownerOf(tokenId);
bool isApprovedOrOwner = (_msgSender() == owner ||
isApprovedForAll(owner, _msgSender()) ||
getApproved(tokenId) == _msgSender());
if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved();
if (owner != from) revert TransferFromIncorrectOwner();
if (to == address(0)) revert TransferToZeroAddress();
if (to == DEAD_ADDR) revert TransferToDeadAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, owner);
// Underflow of the sender's balance is impossible because we check for
// owner above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_balances[from] -= 1;
_balances[to] += 1;
_owners[tokenId] = to;
// If the owner slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_owners[nextTokenId] == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _nextTokenId) {
_owners[nextTokenId] = owner;
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits a {Approval} event.
*/
function _approve(
address to,
uint256 tokenId,
address owner
) private {
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev 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 = ownerOf(tokenId);
_beforeTokenTransfers(owner, address(0), tokenId, 1);
// Clear approvals from the previous owner
_approve(address(0), tokenId, owner);
// Underflow of the sender's balance is impossible because we check for
// owner above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as tokenId would have to be 2**256.
unchecked {
_balances[owner] -= 1;
_balances[DEAD_ADDR] += 1;
_owners[tokenId] = DEAD_ADDR;
// If the owner slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it.
// Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls.
uint256 nextTokenId = tokenId + 1;
if (_owners[nextTokenId] == address(0)) {
// This will suffice for checking _exists(nextTokenId),
// as a burned slot cannot contain the zero address.
if (nextTokenId < _nextTokenId) {
_owners[nextTokenId] = owner;
}
}
}
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfers(owner, address(0), tokenId, 1);
}
/**
* @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(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) revert TransferToNonERC721ReceiverImplementer();
else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes
* minting.
*
* startTokenId - the first token id to be transferred
* quantity - the amount to be transferred
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
}
// File contracts/extensions/ERC721OptOwnersExplicit.sol
pragma solidity ^0.8.4;
error AllOwnersHaveBeenSet();
error QuantityMustBeNonZero();
error NoTokensMintedYet();
abstract contract ERC721OptOwnersExplicit is ERC721Opt {
uint256 public nextOwnerToExplicitlySet = 1;
/**
* @dev Explicitly set `owners` to eliminate loops in future calls of ownerOf().
*/
function _setOwnersExplicit(uint256 quantity) internal {
if (quantity == 0) revert QuantityMustBeNonZero();
if (_nextTokenId == 1) revert NoTokensMintedYet();
uint256 _nextOwnerToExplicitlySet = nextOwnerToExplicitlySet;
if (_nextOwnerToExplicitlySet >= _nextTokenId) revert AllOwnersHaveBeenSet();
// Index underflow is impossible.
// Counter or index overflow is incredibly unrealistic.
unchecked {
uint256 endIndex = _nextOwnerToExplicitlySet + quantity - 1;
// Set the end index to be the last token index
if (endIndex + 1 > _nextTokenId) {
endIndex = _nextTokenId - 1;
}
for (uint256 i = _nextOwnerToExplicitlySet; i <= endIndex; i++) {
if (_owners[i] == address(0) && _owners[i] != DEAD_ADDR) {
address ownership = ownerOf(i);
_owners[i] = ownership;
}
}
nextOwnerToExplicitlySet = endIndex + 1;
}
}
}
// File contracts/extensions/ERC721OptBurnable.sol
pragma solidity ^0.8.4;
error BurnCallerNotOwnerNorApproved();
/**
* @title ERC721Opt Burnable Token
* @dev ERC721Opt Token that can be irreversibly burned (destroyed).
*/
abstract contract ERC721OptBurnable is ERC721Opt {
/**
* @dev Burns `tokenId`. See {ERC721Opt-_burn}.
*
* Requirements:
*
* - The caller must own `tokenId` or be an approved operator.
*/
function burn(uint256 tokenId) public virtual {
if (!_isApprovedOrOwner(_msgSender(), tokenId)) revert BurnCallerNotOwnerNorApproved();
_burn(tokenId);
}
}
// File contracts/extensions/ERC721OptBatchBurnable.sol
pragma solidity ^0.8.4;
/**
* @title ERC721Opt Batch Burnable Token
* @dev ERC721Opt Token that can be irreversibly batch burned (destroyed).
*/
abstract contract ERC721OptBatchBurnable is ERC721OptBurnable {
/**
* @dev Perform burn on a batch of tokens
*/
function batchBurn(uint16[] memory tokenIds) public virtual {
for (uint16 i = 0; i < tokenIds.length; ++i) {
if (!_isApprovedOrOwner(_msgSender(), tokenIds[i])) revert BurnCallerNotOwnerNorApproved();
_burn(tokenIds[i]);
}
}
}
// File contracts/extensions/ERC721OptBatchTransferable.sol
pragma solidity ^0.8.4;
/**
* @title ERC721Opt Batch Transferable Token
* @dev ERC721Opt Token that can be batch transfered
*/
abstract contract ERC721OptBatchTransferable is ERC721Opt {
/**
* @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
* transfers.
*/
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint16[] tokenIds
);
/**
* @dev Perform transferFrom on a batch of tokens
*/
function batchTransferFrom(
address from,
address to,
uint16[] memory tokenIds
) public virtual {
for (uint16 i = 0; i < tokenIds.length; ++i) {
if (!_isApprovedOrOwner(_msgSender(), tokenIds[i])) revert TransferCallerNotOwnerNorApproved();
transferFrom(from, to, tokenIds[i]);
}
emit TransferBatch(_msgSender(), from, to, tokenIds);
}
/**
* @dev Perform safeTransferFrom on a batch of tokens
*/
function safeBatchTransferFrom(
address from,
address to,
uint16[] memory tokenIds
) public virtual {
safeBatchTransferFrom(from, to, tokenIds, '');
}
/**
* @dev Perform safeTransferFrom on a batch of tokens
*/
function safeBatchTransferFrom(
address from,
address to,
uint16[] memory tokenIds,
bytes memory _data
) public virtual {
for (uint256 i = 0; i < tokenIds.length; ++i) {
if (!_isApprovedOrOwner(_msgSender(), tokenIds[i])) revert TransferCallerNotOwnerNorApproved();
safeTransferFrom(from, to, tokenIds[i], _data);
}
emit TransferBatch(_msgSender(), from, to, tokenIds);
}
}
// File contracts/DAOBnBNFT.sol
pragma solidity ^0.8.4;
contract OpenSeaOwnableDelegateProxy {}
contract OpenSeaProxyRegistry {
mapping(address => OpenSeaOwnableDelegateProxy) public proxies;
}
interface IToken {
/**
* @dev Called from DAOBnBNFT when one is transfered/minted/burned
*/
function updateRewards(address _user) external;
}
error CardTypeQueryForNonexistentToken();
error OnlyMintersCanMint();
error NoMintAmountProvided();
error AllSilverCardsMinted();
error AllBlackCardsMinted();
contract DAOBnBNFT is Ownable, ERC721Opt, ERC721OptOwnersExplicit, ERC721OptBatchBurnable, ERC721OptBatchTransferable {
using Strings for uint16;
/* Base URI for token URIs */
string public baseURI;
/* OpenSea user account proxy */
address public openSeaProxyRegistryAddress;
/* Token contract */
IToken public token;
uint16 silverCardsMax = 6400;
uint16 blackCardsMax = 2700;
uint16 blackCardsMinted;
/* mapping of each wallets black cards */
mapping(address => uint16) public walletBlackCards;
/* Minter addressess */
mapping(address => bool) public minters;
/* mapping of each token id to card type 0 = silver, 1 = black */
mapping(uint16 => bool) _blackCardTokenIds;
constructor(string memory name_, string memory symbol_, string memory _initialBaseURI, address _openSeaProxyRegistryAddress, address[] memory _minters) ERC721Opt(name_, symbol_) {
baseURI = _initialBaseURI;
openSeaProxyRegistryAddress = _openSeaProxyRegistryAddress;
for (uint256 i = 0; i < _minters.length; i++) {
minters[_minters[i]] = true;
}
}
/**
* @dev Get silver cards left for sale
*/
function silverCardsLeft() public view returns (uint256) {
return silverCardsMax - (_nextTokenId - 1 - blackCardsMinted);
}
/**
* @dev Get black cards left for sale
*/
function blackCardsLeft() public view returns (uint256) {
return blackCardsMax - blackCardsMinted;
}
/**
* @dev Get the card type for a specific tokenId
*/
function tokenCardType(uint16 tokenId) public view returns (string memory) {
if (!_exists(tokenId)) revert CardTypeQueryForNonexistentToken();
if (_blackCardTokenIds[tokenId]) {
return "black";
}
return "silver";
}
/**
* @dev Override to if default approved for OS proxy accounts or normal approval
*/
function isApprovedForAll(address owner, address operator)
public
view
override
returns (bool)
{
// Whitelist OpenSea proxy contract for easy trading.
OpenSeaProxyRegistry openSeaProxyRegistry = OpenSeaProxyRegistry(
openSeaProxyRegistryAddress
);
if (address(openSeaProxyRegistry.proxies(owner)) == operator) {
return true;
}
return ERC721Opt.isApprovedForAll(owner, operator);
}
/**
* @dev Override to change the baseURI used in tokenURI
*/
function _baseURI() internal view virtual override returns (string memory) {
return baseURI;
}
/**
* @dev Override to change tokenURI format
*/
function tokenURI(uint256 tokenId)
public
view
virtual
override
returns (string memory)
{
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
return
bytes(baseURI).length > 0
? string(abi.encodePacked(_baseURI(), tokenCardType(uint16(tokenId)), '.json'))
: '';
}
/**
* @dev Mint of specific card type to address.
*/
function mint(uint16 silverCardsAmount, uint16 blackCardsAmount, address to) public {
if(!minters[msg.sender]) revert OnlyMintersCanMint();
if(silverCardsAmount + blackCardsAmount == 0) revert NoMintAmountProvided();
if(_nextTokenId - 1 - blackCardsMinted + silverCardsAmount > silverCardsMax) revert AllSilverCardsMinted();
if(blackCardsMinted + blackCardsAmount > blackCardsMax) revert AllBlackCardsMinted();
if (blackCardsAmount > 0) {
blackCardsMinted += blackCardsAmount;
uint16 tokenId = uint16(_nextTokenId) + silverCardsAmount;
for (uint16 i; i < blackCardsAmount; i++) {
_blackCardTokenIds[tokenId++] = true;
}
}
_safeMint(to, silverCardsAmount + blackCardsAmount, '');
}
/**
* @dev Override so we can update token rewards before transfer happens
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual override {
if (address(token) != address(0)) {
token.updateRewards(from);
token.updateRewards(to);
}
uint16 blackCards;
for(uint16 i = uint16(startTokenId); i < startTokenId + quantity; i++) {
if (_blackCardTokenIds[i]) {
blackCards += 1;
}
}
if (from != address(0)) {
walletBlackCards[from] -= blackCards;
}
if (to != address(0)) {
walletBlackCards[to] += blackCards;
}
super._beforeTokenTransfers(from, to, startTokenId, quantity);
}
/**
* @dev Set the base uri for token metadata
*/
function setBaseURI(string memory _newBaseURI) external onlyOwner {
baseURI = _newBaseURI;
}
/**
* @dev Set minter status for addresses
*/
function setMinters(address[] calldata addresses, bool allowed) external onlyOwner {
for(uint256 i = 0; i < addresses.length; i++) {
minters[addresses[i]] = allowed;
}
}
/**
* @dev Update available cards
*/
function updateAvailableCards(uint16 silverCards, uint16 blackCards) external onlyOwner {
silverCardsMax = silverCards;
blackCardsMax = blackCards;
}
/**
* @dev Set the token contract
*/
function setToken(IToken _token) external onlyOwner {
token = _token;
}
/**
* @dev Force update all owners for better transfers
*/
function updateOwners(uint256 quantity) external onlyOwner {
_setOwnersExplicit(quantity);
}
}
// File @openzeppelin/contracts/utils/cryptography/[email protected]
// OpenZeppelin Contracts v4.4.1 (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.0;
/**
* @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;
uint8 v;
assembly {
s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
v := add(shr(255, vs), 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));
}
}
// File contracts/DAOBnBMinter.sol
pragma solidity ^0.8.0;
contract DAOBnBMinter is Ownable {
using Strings for uint16;
using ECDSA for bytes32;
/* DAObnb NFT contract */
DAOBnBNFT nftContract;
/* Is Pre Sale Active */
bool public preSaleIsActive;
/* Is Sale Active */
bool public saleIsActive;
/* If > 0 limit pre sale silver cards purchases per address */
uint16 public maxPreSaleSilverCardsPerAddress = 2;
/* If > 0 limit pre sale black cards purchases per address */
uint16 public maxPreSaleBlackCardsPerAddress = 1;
/* Limit how many silver cards can be purchased in single transaction for pre sale */
uint16 public maxPreSaleSilverCardsPerTransaction = 2;
/* Limit how many black cards can be purchased in single transaction for pre sale */
uint16 public maxPreSaleBlackCardsPerTransaction = 1;
/* Limit how many silver cards can be purchased in single transaction for public sale */
uint16 public maxSilverCardsPerTransaction = 16;
/* Limit how many black cards can be purchased in single transaction for public sale */
uint16 public maxBlackCardsPerTransaction = 4;
/* silver cards reserved for marketing */
uint16 public reservedSilverCards = 640;
/* black cards reserved for marketing */
uint16 public reservedBlackCards = 270;
/* Price for silver card during pre sale */
uint256 public preSaleSilverCardPrice = 0.175 ether;
/* Price for black card during pre sale */
uint256 public preSaleBlackCardPrice = 0.7 ether;
/* Price for silver card during public sale */
uint256 public silverCardPrice = 0.175 ether;
/* Price for black card during public sale */
uint256 public blackCardPrice = 0.7 ether;
/* PreSaleList Signature Addresses */
mapping(address => bool) public preSaleListSignatureAddresses;
/* PreSaleList Signature Nounces used */
mapping(uint16 => address) public preSaleListSignatureUsedNounces;
/* PreSaleListed addressess */
mapping(address => bool) public preSaleListedAddresses;
/* Silver cards minted per address during pre sale */
mapping(address => uint16) public preSaleSilverCardPurchases;
/* Black cards minted per address during pre sale */
mapping(address => uint16) public preSaleBlackCardPurchases;
constructor(
DAOBnBNFT _nftContract,
address[] memory _preSaleListSignatureAddresses
) {
nftContract = _nftContract;
for (uint256 i = 0; i < _preSaleListSignatureAddresses.length; i++) {
preSaleListSignatureAddresses[_preSaleListSignatureAddresses[i]] = true;
}
}
function getPreSaleListMessage(uint16 nounce, address sender)
public
pure
returns (bytes32)
{
if (nounce > 0) {
return keccak256(abi.encodePacked('ProjectId: 621285d3e200cdf5b5ef5704, Nounce: ', nounce));
}
return keccak256(abi.encodePacked('ProjectId: 621285d3e200cdf5b5ef5704, Address: ', sender));
}
function mintPreSale(uint16 silverCardsAmount, uint16 blackCardsAmount, uint16 nounce, bytes calldata signature) external payable {
require(preSaleIsActive, 'Pre sale must be active to mint pre sale');
require(!saleIsActive, 'Regular sale is already active');
require(
silverCardsAmount + blackCardsAmount > 0,
'No amounts provided'
);
require(
silverCardsAmount <= maxPreSaleSilverCardsPerTransaction,
'Can not mint that many silver tokens in a single transaction during the pre sale'
);
require(
blackCardsAmount <= maxPreSaleBlackCardsPerTransaction,
'Can not mint that many black tokens in a single transaction during the pre sale'
);
require(
silverCardsAmount <= nftContract.silverCardsLeft() - reservedSilverCards,
'Sold Out'
);
require(
blackCardsAmount <= nftContract.blackCardsLeft() - reservedBlackCards,
'Sold Out'
);
require(
preSaleSilverCardPurchases[msg.sender] + silverCardsAmount <= maxPreSaleSilverCardsPerAddress,
'Can only mint so many silver cards during the presale'
);
require(
preSaleBlackCardPurchases[msg.sender] + blackCardsAmount <= maxPreSaleBlackCardsPerAddress,
'Can only mint so many black cards during the presale'
);
require(
msg.value >= (preSaleSilverCardPrice * silverCardsAmount) + (preSaleBlackCardPrice * blackCardsAmount),
'Ether value sent is not correct'
);
require(preSaleListedAddresses[_msgSender()] || signature.length > 0, 'Signature required for pre sale');
require(nounce == 0 || preSaleListSignatureUsedNounces[nounce] == address(0) || preSaleListSignatureUsedNounces[nounce] == _msgSender(), 'Invalid or used nounce');
if (!preSaleListedAddresses[_msgSender()] && preSaleListSignatureUsedNounces[nounce] != _msgSender()) {
bytes32 message = getPreSaleListMessage(nounce, _msgSender());
bytes32 messageHash = message.toEthSignedMessageHash();
address signer = messageHash.recover(signature);
require(preSaleListSignatureAddresses[signer], 'Signature invalid');
if (nounce > 0) {
preSaleListSignatureUsedNounces[nounce] = _msgSender();
}
}
preSaleSilverCardPurchases[msg.sender] += silverCardsAmount;
preSaleBlackCardPurchases[msg.sender] += blackCardsAmount;
nftContract.mint(silverCardsAmount, blackCardsAmount, msg.sender);
}
function mint(uint16 silverCardsAmount, uint16 blackCardsAmount) external payable {
require(saleIsActive, 'Regular sale is not active');
require(
silverCardsAmount + blackCardsAmount > 0,
'No amounts provided'
);
require(
silverCardsAmount <= maxSilverCardsPerTransaction,
'Can not mint that many silver cards in a single transaction during the sale'
);
require(
blackCardsAmount <= maxBlackCardsPerTransaction,
'Can not mint that many black cards in a single transaction during the sale'
);
require(
silverCardsAmount <= nftContract.silverCardsLeft() - reservedSilverCards,
'Sold Out'
);
require(
blackCardsAmount <= nftContract.blackCardsLeft() - reservedBlackCards,
'Sold Out'
);
require(
msg.value >= (silverCardPrice * silverCardsAmount) + (blackCardPrice * blackCardsAmount),
'Ether value sent is not correct'
);
nftContract.mint(silverCardsAmount, blackCardsAmount, _msgSender());
}
/**
* @dev Update a list of addresses to be allowed to be used for signature based preSaleList
*/
function updatePreSaleListSignatureAddresses(address[] memory _preSaleListSignatureAddresses, bool allowed)
external
onlyOwner
{
for (uint256 i = 0; i < _preSaleListSignatureAddresses.length; i++) {
preSaleListSignatureAddresses[_preSaleListSignatureAddresses[i]] = allowed;
}
}
/**
* @dev Update a list of addresses to be allowed in preSaleList
*/
function updatePreSaleListedAddresses(address[] memory _preSaleListedAddresses, bool allowed)
external
onlyOwner
{
for (uint256 i = 0; i < _preSaleListedAddresses.length; i++) {
preSaleListedAddresses[_preSaleListedAddresses[i]] = allowed;
}
}
function flipPreSaleState() external onlyOwner {
preSaleIsActive = !preSaleIsActive;
}
function flipSaleState() external onlyOwner {
saleIsActive = !saleIsActive;
}
function setMaxPreSaleCardsPerAddress(uint16 _silverCardsAmount, uint16 _blackCardsAmount) external onlyOwner {
maxPreSaleSilverCardsPerAddress = _silverCardsAmount;
maxPreSaleBlackCardsPerAddress = _blackCardsAmount;
}
function setMaxPreSaleCardsPerTransaction(uint16 _silverCardsAmount, uint16 _blackCardsAmount) external onlyOwner {
maxPreSaleSilverCardsPerTransaction = _silverCardsAmount;
maxPreSaleBlackCardsPerTransaction = _blackCardsAmount;
}
function setMaxCardsPerTransaction(uint16 _silverCardsAmount, uint16 _blackCardsAmount, bool updatePreSaleAlso) external onlyOwner {
maxSilverCardsPerTransaction = _silverCardsAmount;
maxBlackCardsPerTransaction = _blackCardsAmount;
if (updatePreSaleAlso) {
maxPreSaleSilverCardsPerTransaction = _silverCardsAmount;
maxPreSaleBlackCardsPerTransaction = _blackCardsAmount;
}
}
function setReservedCards(uint16 _silverCardsAmount, uint16 _blackCardsAmount) external onlyOwner {
reservedSilverCards = _silverCardsAmount;
reservedBlackCards = _blackCardsAmount;
}
function setPreSalePrice(uint256 _silverCardPrice, uint256 _blackCardPrice) external onlyOwner {
preSaleSilverCardPrice = _silverCardPrice;
preSaleBlackCardPrice = _blackCardPrice;
}
function setPrice(uint256 _silverCardPrice, uint256 _blackCardPrice, bool updatePreSaleAlso) external onlyOwner {
silverCardPrice = _silverCardPrice;
blackCardPrice = _blackCardPrice;
if (updatePreSaleAlso) {
preSaleSilverCardPrice = _silverCardPrice;
preSaleBlackCardPrice = _blackCardPrice;
}
}
function reserveMint(uint16 silverCardsAmount, uint16 blackCardsAmount, address[] calldata to) external onlyOwner {
require(
(silverCardsAmount * to.length) <= reservedSilverCards,
'Not enough reserve left for team'
);
require(
(blackCardsAmount * to.length) <= reservedBlackCards,
'Not enough reserve left for team'
);
require(
silverCardsAmount + blackCardsAmount > 0,
'No amounts provided'
);
for (uint16 i = 0; i < to.length; i++) {
nftContract.mint(silverCardsAmount, blackCardsAmount, to[i]);
}
reservedSilverCards = uint16(reservedSilverCards - (silverCardsAmount * to.length));
reservedBlackCards = uint16(reservedBlackCards - (blackCardsAmount * to.length));
}
function withdraw() external onlyOwner {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
}