Contract Source Code:
File 1 of 1 : WetWaifus
// Sources flattened with hardhat v2.4.3 https://hardhat.org
// File @openzeppelin/contracts/utils/[email protected]
// SPDX-License-Identifier: MIT
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]
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() {
_setOwner(_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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// File contracts/MerkleProof.sol
pragma solidity ^0.8.5;
/**
* @dev These functions deal with verification of Merkle trees (hash trees),
*/
contract MerkleProof is Ownable {
// merkle tree root used to validate the provided address and assigned proof
bytes32 public root;
bool public canChangeMerkleRoot = true;
/**
* @dev Disable changes for merkle root
*/
function disableMerkleRootChanges() external onlyOwner {
require(canChangeMerkleRoot, "MerkleRoot changes are disabled");
canChangeMerkleRoot = false;
}
/**
* @dev Set the merkle tree root hash
* @param _root hash to save
*/
function setMerkleRoot(bytes32 _root) external onlyOwner {
require(canChangeMerkleRoot, "The MerkleRoot can't be changed anymore");
require(_root.length > 0, "Root is empty");
root = _root;
}
/**
* @dev Modifier to check if the sender can mint tokens
* @param proof hashes to validate
*/
modifier canMintEarly(bytes32[] memory proof) {
require(isProofValid(proof), "the proof for this sender is not valid");
_;
}
/**
* @dev Check if the sender can mint tokens
* @param proof hashes to validate
*/
function isProofValid(bytes32[] memory proof) public view returns (bool) {
bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
return verify(leaf, proof);
}
/**
* @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
* defined by `root`. For this, a `proof` must be provided, containing
* sibling hashes on the branch from the leaf to the root of the tree. Each
* pair of leaves and each pair of pre-images are assumed to be sorted.
*/
function verify(bytes32 leaf, bytes32[] memory proof)
internal
view
returns (bool)
{
bytes32 computedHash = leaf;
for (uint256 i = 0; i < proof.length; i++) {
bytes32 proofElement = proof[i];
if (computedHash <= proofElement) {
// Hash(current computed hash + current element of the proof)
computedHash = keccak256(
abi.encodePacked(computedHash, proofElement)
);
} else {
// Hash(current element of the proof + current computed hash)
computedHash = keccak256(
abi.encodePacked(proofElement, computedHash)
);
}
}
// Check if the computed hash (root) is equal to the provided root
return computedHash == root;
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
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]
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]
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]
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]
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);
}
function _verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) private 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]
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]
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 @openzeppelin/contracts/token/ERC721/[email protected]
pragma solidity ^0.8.0;
/**
* @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 {
require(operator != _msgSender(), "ERC721: approve to caller");
_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 {
//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);
}
/**
* @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);
}
/**
* @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 of token that is not own");
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);
}
/**
* @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 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("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 {}
}
// File @openzeppelin/contracts/security/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev ERC721 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC721Pausable is ERC721, Pausable {
/**
* @dev See {ERC721-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
require(!paused(), "ERC721Pausable: token transfer while paused");
}
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}
// File @openzeppelin/contracts/token/ERC721/extensions/[email protected]
pragma solidity ^0.8.0;
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @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` cannot be the zero address.
* - `to` cannot be the zero address.
*
* 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 override {
super._beforeTokenTransfer(from, to, tokenId);
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}
// File @openzeppelin/contracts/utils/introspection/[email protected]
pragma solidity ^0.8.0;
/**
* @dev Storage based implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
abstract contract ERC165Storage is ERC165 {
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return super.supportsInterface(interfaceId) || _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
}
// File @openzeppelin/contracts/security/[email protected]
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 make 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;
}
}
// File contracts/Fields.sol
pragma solidity >=0.8.5;
contract Fields {
// emits BaseURIChanged event when the baseUri changes
event BaseURIChanged(
address indexed _owner,
string initialBaseURI,
string finalBaseURI
);
// maximum number of tokens that can be minted
uint256 public constant MAX_TOKENS = 8008;
// maximum number of tokens that can be early minted
uint256 public constant MAX_EARLY_TOKENS = 25;
// maximum number of tokens that can be early minted in the first day after minting has tarted
uint256 public constant MAX_EARLY_TOKENS_FIRST_DAY = 10;
// maximum number of tokens that can be minted in a single transaction
uint256 public constant MAX_TOKENS_PER_PURCHASE = 25;
// maximum number of blind tokens that can be minted in a single transaction
uint256 public constant MAX_BLIND_TOKENS = 5;
// the price to mint a token
uint256 public constant MINT_PRICE = 20000000000000000; // 0.02 Ether
// receiver address to ge the funds
address[] public receiverAddresses;
// receiver percentage of total funds
uint256[] public receiverPercentages;
// current balance to withdraw from contract by a specific address
uint256[] internal currentTeamBalance;
// mapping from address to index of receiverAddresses array
mapping(address => uint8) internal addressToIndex;
uint8 public MAX_TOKENS_BEFORE_BEFORE_WITHDRAW = 50;
uint8 public currentMaxTokensBeforeWithdraw = 0;
uint16 percentCommunity = 769; // 1% of sales
uint16 percentCharity = 3077; // 4% of sales
uint16 percentMarketing = 3077; // 4% of sales
uint16 percentReserve = 3077; // 4% of sales
uint256 internal oneHundred = 100;
mapping(uint8 => uint256) comunityTotalBalanceEarned;
mapping(uint8 => uint256) communityBalanceSpent;
// flag that signals if blind minting is started
bool public blindMintingStarted = false;
// maximum number of time that the blind minting is open
uint256 public blindMintingTime = 5 hours;
// save the number of tokens blind minters have minted
mapping(address => uint256) public blindMintedTokensByOwner;
// ealry miting one day time
uint256 public EARLY_MINT_TIME_ONE_DAY = 1 days;
// maximum ealry minting time
uint256 public MAX_EALRY_MINTING_TIME = 3 days;
// Reserved tokens for Team/Giveaways/Prises etc
uint256 public reservedTokens = 200;
// Already minted reserved tokens
uint256 public mintedReservedTokens = 0;
// minting start time
uint256 public mintingStartTime;
// flag for verifying if minting was started or not
bool public isMintingStarted = false;
// allow early adopters to mint tokens. Once disabled can't be enabled back
bool public earlyMinting = true;
// save the number of tokens early minters have minted
mapping(address => uint256) public earlyMintedTokensByOwner;
// flag to signal if the owner can change the baseURI
bool public canChangeBaseURI = true;
// the baseURI for token metadata
string public baseURI = "";
// flag to signal if the owner can change the provenance
bool public canChangeProvenance = true;
// provenance proof for hashed images
string public provenance = "";
// nonce to be used on generating the random token id
uint256 internal nonce = 0;
uint256[MAX_TOKENS] internal indices;
// maximum number of tokens with trap
uint256 public MAX_TRAPPED_TOKENS = 500;
// list of token ids with traps
uint256[] public tokenIdsWithTrap;
// mapping tokenIds to trap flag
mapping(uint256 => bool) public hasTrap;
// previous random number used to compute the next one
uint256 internal previousRandomNumber;
// trap description
string public trapMessage = "";
// flag to signal if the owner can change trap message
bool public canChangeTrapMessage = true;
}
// File contracts/Utils.sol
pragma solidity >=0.8.5;
abstract contract Utils is
Fields,
MerkleProof,
ERC165Storage,
ERC721Pausable,
ERC721Enumerable,
ReentrancyGuard
{
/*
* accepts ether sent with no txData
*/
receive() external payable {}
/*
* refuses ether sent with txData that does not match any function signature in the contract
*/
fallback() external {}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function pause() public onlyOwner {
super._pause();
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function unpause() public onlyOwner {
super._unpause();
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId)
public
view
virtual
override(ERC721, ERC165Storage, ERC721Enumerable)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
/**
* @dev Send an amount of value to a specific address
* @param to_ address that will receive the value
* @param value to be sent to the address
*/
function sendValueTo(address to_, uint256 value) internal {
address payable to = payable(to_);
(bool success, ) = to.call{value: value}("");
require(success, "Transfer failed.");
}
/**
* @dev See {IERC721-safeTransferFrom}.
* @param from address from which to transfer the token
* @param to address to which to transfer the token
* @param tokenId to transfer
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
super.safeTransferFrom(from, to, tokenId);
}
/**
* @dev See {IERC721-transferFrom}.
* @param from address from which to transfer the token
* @param to address to which to transfer the token
* @param tokenId to transfer
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
super.transferFrom(from, to, tokenId);
}
/**
* @dev See {ERC721-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override(ERC721Pausable, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId);
}
/**
* @dev Get the ETH balance of the current contract
*/
function getBalance() public view returns (uint256) {
return address(this).balance;
}
/**
* @dev Get the remaining contract balance
*/
function getRemainingContractBalance() public view returns (uint256) {
uint256 balance = address(this).balance;
uint256 teamBalance = 0;
for (uint8 i = 0; i < currentTeamBalance.length; i++) {
teamBalance += currentTeamBalance[i];
}
if (balance > teamBalance) {
return balance - teamBalance;
}
return 0;
}
/**
* @dev Withdraw remaining contract balance to owner
*/
function withdrawRemainingContractBalance() public onlyOwner {
uint256 remainingBalance = getRemainingContractBalance();
require(
remainingBalance > 0,
"There is no contract balance to withdraw"
);
sendValueTo(owner(), remainingBalance);
}
/**
* @dev baseURI for computing {tokenURI}. Empty by default, can be overwritten
* in child contracts.
*/
function _baseURI() internal view override returns (string memory) {
return baseURI;
}
/**
* @dev Disable changes for provenance
*/
function disableProvenanceChange() external onlyOwner {
require(canChangeProvenance, "Provenance changes are disabled");
canChangeProvenance = false;
}
/**
* @dev Set the NFT IPFS hash proof for tokens metadata
* @param provenance_ string to save
*/
function setProvenance(string memory provenance_) public onlyOwner {
require(canChangeProvenance, "Provenance can't be changed anymore");
require(bytes(provenance_).length > 0, "provenance is empty");
provenance = provenance_;
}
/**
* @dev Get the list of tokens for a specific owner
* @param _owner address to retrieve token ids for
*/
function tokensByOwner(address _owner)
external
view
returns (uint256[] memory)
{
uint256 tokenCount = balanceOf(_owner);
if (tokenCount == 0) {
return new uint256[](0);
} else {
uint256[] memory result = new uint256[](tokenCount);
uint256 index;
for (index = 0; index < tokenCount; index++) {
result[index] = tokenOfOwnerByIndex(_owner, index);
}
return result;
}
}
/**
* @dev Disable changes for baseURI
*/
function disableBaseURIChanges() external onlyOwner {
require(canChangeBaseURI, "BaseURI changes are disabled");
canChangeBaseURI = false;
}
/**
* @dev Set the baseURI to a given uri
* @param baseURI_ string to save
*/
function changeBaseURI(string memory baseURI_) public onlyOwner {
require(canChangeBaseURI, "The baseURI can't be changed anymore");
require(!blindMintingStarted, "Blind minting is started");
require(bytes(baseURI_).length > 0, "baseURI is empty");
emit BaseURIChanged(msg.sender, baseURI, baseURI_);
baseURI = baseURI_;
}
/**
* Get a random number used to check if a token has a trap
*/
function getTrapRandom(uint256 id) internal returns (uint256) {
uint256 number = uint256(
keccak256(
abi.encodePacked(
id,
previousRandomNumber,
nonce,
msg.sender,
block.difficulty,
block.timestamp
)
)
) % MAX_TOKENS;
previousRandomNumber = number;
return number;
}
/**
* Credits to LarvaLabs Meebits contract
*/
function randomIndex() internal returns (uint256) {
uint256 totalSize = MAX_TOKENS - totalSupply();
uint256 index = uint256(
keccak256(
abi.encodePacked(
nonce,
msg.sender,
block.difficulty,
block.timestamp
)
)
) % totalSize;
uint256 value = 0;
if (indices[index] != 0) {
value = indices[index];
} else {
value = index;
}
// Move last value to selected position
if (indices[totalSize - 1] == 0) {
// Array position not initialized, so use position
indices[index] = totalSize - 1;
} else {
// Array position holds a value so use that
indices[index] = indices[totalSize - 1];
}
nonce++;
// Don't allow a zero index, start counting at 1
return value + 1;
}
}
// File @openzeppelin/contracts/utils/math/[email protected]
pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// File contracts/WetWaifus.sol
pragma solidity >=0.8.5;
contract WetWaifus is Utils {
using SafeMath for uint256;
constructor(
string memory name_,
string memory symbol_,
address[] memory receiverAddresses_,
uint256[] memory receiverPercentages_
) ERC721(name_, symbol_) {
require(
receiverAddresses.length == receiverPercentages.length,
"Addresses and percentage lengths are not the same"
);
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(type(IERC721).interfaceId);
_registerInterface(type(IERC721Metadata).interfaceId);
_registerInterface(type(IERC721Enumerable).interfaceId);
receiverAddresses = receiverAddresses_;
receiverPercentages = receiverPercentages_;
currentTeamBalance = new uint256[](receiverAddresses.length);
for (uint8 i = 0; i < receiverAddresses.length; i++) {
addressToIndex[receiverAddresses[i]] = i + 1;
}
}
/**
* @dev Return the community address
*/
function getCommuntiyAddress() public view returns (address) {
return receiverAddresses[receiverAddresses.length - 1];
}
/**
* @dev Get the current balance of a calling team member
*/
function getCurrentTeamMemberBalanceToWithdraw()
public
view
returns (uint256)
{
uint8 index = addressToIndex[msg.sender];
require(index > 0, "The sender doesn't have balance");
return currentTeamBalance[index - 1];
}
/**
* @dev Withdraw the entire balance of calling team member
*/
function withdrawBalance() public {
require(
msg.sender != getCommuntiyAddress(),
"Can't withdraw community balance from this function"
);
uint8 index = addressToIndex[msg.sender];
require(index > 0, "The sender is not allowed to check the balance");
index -= 1;
uint256 value = currentTeamBalance[index];
require(value > 0, "No balance to withdraw");
currentTeamBalance[index] = 0;
sendValueTo(msg.sender, value);
}
/**
* @dev Change the address of the calling team member
* @param newAddress to witch to update to
*/
function changeAddress(address newAddress) public {
uint8 index = addressToIndex[msg.sender];
require(index > 0, "The sender is not allowed to change the address");
addressToIndex[msg.sender] = 0;
addressToIndex[newAddress] = index;
receiverAddresses[index - 1] = newAddress;
}
/**
* @dev Get the total balance collected for the community wallet
*/
function getTotalEarnedCommunityWalletBalance()
public
view
returns (uint256)
{
return comunityTotalBalanceEarned[0];
}
/**
* @dev Get the remaining balance for the community wallet
*/
function getCommunityWalletBalance() public view returns (uint256) {
return
getTotalEarnedCommunityWalletBalance() - communityBalanceSpent[0];
}
/**
* @dev Get the total balance collected for the charity
*/
function getTotalEarnedCharityBalance() public view returns (uint256) {
return comunityTotalBalanceEarned[1];
}
/**
* @dev Get the remaining balance for the charity
*/
function geCharityBalance() public view returns (uint256) {
return getTotalEarnedCharityBalance() - communityBalanceSpent[1];
}
/**
* @dev Get the total balance collected for marketing
*/
function getTotalEarnedMarketingBalance() public view returns (uint256) {
return comunityTotalBalanceEarned[2];
}
/**
* @dev Get the remaining balance for marketing
*/
function geMarketingBalance() public view returns (uint256) {
return getTotalEarnedMarketingBalance() - communityBalanceSpent[2];
}
/**
* @dev Get the total balance collected for the reserve
*/
function getTotalEarnedReserveBalance() public view returns (uint256) {
return comunityTotalBalanceEarned[3];
}
/**
* @dev Get the remaining balance for reserve
*/
function geReserveBalance() public view returns (uint256) {
return getTotalEarnedReserveBalance() - communityBalanceSpent[3];
}
/**
* @dev Check if the sender matches the community address
*/
modifier checkIfIsCommunityAddress() {
require(
msg.sender == getCommuntiyAddress(),
"The sender is not the community address"
);
_;
}
/**
* @dev Withdraw the all the community wallet funds
*/
function withdrawCommunityWallet() public checkIfIsCommunityAddress {
withdrawCommunityWalletTo(msg.sender, 0);
}
/**
* @dev Withdraw the community balance to a given address
* @param to is the address to witch to send the funds
* @param balance are the funds that has to be sent to the address
*/
function withdrawCommunityWalletTo(address to, uint256 balance)
public
checkIfIsCommunityAddress
{
_withdrawFromCommunityTo(0, percentCommunity, to, balance);
}
/**
* @dev Withdraw all the the charirty funds
*/
function withdrawCharity() public checkIfIsCommunityAddress {
withdrawCharityTo(msg.sender, 0);
}
/**
* @dev Withdraw the charity funds to a given address
* @param to is the address to witch to send the funds
* @param balance are the funds that has to be sent to the address
*/
function withdrawCharityTo(address to, uint256 balance)
public
checkIfIsCommunityAddress
{
_withdrawFromCommunityTo(1, percentCharity, to, balance);
}
/**
* @dev Withdraw all the marketing funfs
*/
function withdrawMarketing() public checkIfIsCommunityAddress {
withdrawMarketingTo(msg.sender, 0);
}
/**
* @dev Withdraw the marketing balance to a given address
* @param to is the address to witch to send the funds
* @param balance are the funds that has to be sent to the address
*/
function withdrawMarketingTo(address to, uint256 balance)
public
checkIfIsCommunityAddress
{
_withdrawFromCommunityTo(2, percentMarketing, to, balance);
}
/**
* @dev Withdraw all the reserve funds
*/
function withdrawReserve() public checkIfIsCommunityAddress {
withdrawReserveTo(msg.sender, 0);
}
/**
* @dev Withdraw the reserve balance to a given address
* @param to is the address to witch to send the funds
* @param balance are the funds that has to be sent to the address
*/
function withdrawReserveTo(address to, uint256 balance)
public
checkIfIsCommunityAddress
{
_withdrawFromCommunityTo(3, percentReserve, to, balance);
}
/**
* @dev Withdraw the specidifed balance to a given address
* @param walletIndex is the index for community/charity/marketing/reserve
* @param percent is the maximum balance to withdraw
* @param to is the address to witch to send the funds
* @param balance are the funds that has to be sent to the address
*/
function _withdrawFromCommunityTo(
uint8 walletIndex,
uint16 percent,
address to,
uint256 balance
) private {
uint8 index = addressToIndex[msg.sender];
index -= 1;
uint256 value = currentTeamBalance[index];
require(value > 0, "No balance to withdraw");
uint256 availableBalance = (value * percent) / oneHundred**2;
if (balance > 0) {
require(availableBalance >= balance, "Too much to witdraw");
currentTeamBalance[index] -= balance;
communityBalanceSpent[walletIndex] += balance;
sendValueTo(to, balance);
} else {
currentTeamBalance[index] -= availableBalance;
communityBalanceSpent[walletIndex] += availableBalance;
sendValueTo(to, availableBalance);
}
}
/**
* @dev Enable minting of tokens
*/
function startMinting() public onlyOwner {
require(!isMintingStarted, "Minting is already started");
mintingStartTime = block.timestamp;
isMintingStarted = true;
blindMintingStarted = true;
}
/**
* @dev Disable changes for trap message
*/
function disableTrapMessageChanges() external onlyOwner {
require(canChangeTrapMessage, "The trap message changes are disabled");
canChangeTrapMessage = false;
}
/**
* @dev Set the trap message
* @param trapMessage_ string to save
*/
function changeTrapMessage(string memory trapMessage_) public onlyOwner {
require(
canChangeTrapMessage,
"The trap message can't be changed anymore"
);
require(bytes(trapMessage_).length > 0, "trap message is empty");
trapMessage = trapMessage_;
}
/**
* @dev Disable blind minting
*/
function disableBlindMinting() external onlyOwner {
require(isMintingStarted, "Minting hasn't started yet");
require(blindMintingStarted, "Blind minting already disabled");
blindMintingStarted = false;
mintingStartTime = block.timestamp;
}
/**
* @dev Disable early minting
*/
function disableEarlyMinting() external onlyOwner {
require(earlyMinting, "Early minting already disabled");
earlyMinting = false;
}
/**
* @dev Mint tokens for community wallet
*/
function mintToCommunityWallet(uint8 _count) external {
// TODO add onlyOwner
require(
_count > 0 && _count <= reservedTokens,
"Too many reserved tokens to mint at once"
);
require(
_count + mintedReservedTokens <= reservedTokens,
"Too many reserved tokens to mint"
);
mintedReservedTokens += _count;
mintNTokensFor(getCommuntiyAddress(), _count);
}
/**
* @dev Mint blind tokens
* @param _count the number of tokens to be minted
*/
function blindMint(uint8 _count) public payable nonReentrant {
require(isMintingStarted, "Minting hasn't started yet");
require(blindMintingStarted, "Blind minting is not started");
require(
block.timestamp - mintingStartTime <= blindMintingTime,
"Blind minting has passed"
);
require(_count <= MAX_BLIND_TOKENS, "To many blind tokens to mint");
require(
_count + blindMintedTokensByOwner[msg.sender] <= MAX_BLIND_TOKENS,
"Too many blind tokens to mint in total"
);
blindMintedTokensByOwner[msg.sender] += _count;
_mint(_count);
}
/**
* @dev Mint tokens early
* @param _count the number of tokens to be minted
* @param proof to validate if the sender can mint the tokens early
*/
function earlyMint(uint8 _count, bytes32[] memory proof)
public
payable
nonReentrant
canMintEarly(proof)
{
require(isMintingStarted, "Minting hasn't started yet");
require(!blindMintingStarted, "Blind minting is started");
require(
block.timestamp - mintingStartTime <= MAX_EALRY_MINTING_TIME,
"Early minting has passed"
);
require(
earlyMinting,
"The early minting is disabled. Use the mint function"
);
if (block.timestamp - mintingStartTime <= EARLY_MINT_TIME_ONE_DAY) {
require(
_count <= MAX_EARLY_TOKENS_FIRST_DAY,
"To many tokens to be minted early in the first day"
);
require(
_count + earlyMintedTokensByOwner[msg.sender] <=
MAX_EARLY_TOKENS_FIRST_DAY,
"Too many early tokens to mint in total"
);
} else {
require(
_count <= MAX_EARLY_TOKENS,
"Too many early tokens to mint"
);
require(
_count + earlyMintedTokensByOwner[msg.sender] <=
MAX_EARLY_TOKENS,
"Too many early tokens to mint in total"
);
}
earlyMintedTokensByOwner[msg.sender] += _count;
_mint(_count);
}
/**
* @dev Mint new tokens
* @param _count the number of tokens to be minted
*/
function mint(uint8 _count) public payable nonReentrant {
require(isMintingStarted, "Minting hasn't started yet");
require(!blindMintingStarted, "Blind minting is started");
require(
!earlyMinting,
"The early minting is enabled. Use earlyMint function"
);
_mint(_count);
}
/**
* Check if the token can have the trap
*/
function checkAndSaveTrap(uint256 id) internal {
if (tokenIdsWithTrap.length == MAX_TRAPPED_TOKENS) {
return;
}
uint256 number = getTrapRandom(id);
if (number < MAX_TRAPPED_TOKENS) {
hasTrap[id] = true;
tokenIdsWithTrap.push(id);
}
}
/**
* @dev Mint n tokens for an address
* @param to address to mint tokens for
* @param n number of tokens to mint
*/
function mintNTokensFor(address to, uint8 n) internal {
for (uint8 i = 0; i < n; i++) {
_mintToken(to);
}
}
/**
* @dev Mint token for an address
* @param to address to mint token for
*/
function _mintToken(address to) internal {
uint256 id = randomIndex();
checkAndSaveTrap(id);
_safeMint(to, id);
}
/**
* @dev Mint new tokens
* @param _count the number of tokens to be minted
*/
function _mint(uint8 _count) internal {
require(!paused(), "Minting is paused");
uint256 totalSupply = totalSupply();
require(
_count <= MAX_TOKENS_PER_PURCHASE,
"Exceeds maximum tokens per transaction"
);
require(
totalSupply + _count <= MAX_TOKENS - reservedTokens,
"Exceeds maximum tokens available to mint"
);
require(
msg.value == MINT_PRICE.mul(_count),
"Mint value is not the expected one"
);
for (uint256 i = 0; i < _count; i++) {
_mintToken(msg.sender);
}
distributePayout(_count);
}
/**
* @dev Distribute the mint value to team and community
* @param _count the number of tokens that were minted
*/
function distributePayout(uint8 _count) internal {
uint256 value = msg.value;
uint8 n = uint8(receiverAddresses.length);
if (
currentMaxTokensBeforeWithdraw + _count <=
MAX_TOKENS_BEFORE_BEFORE_WITHDRAW
) {
currentMaxTokensBeforeWithdraw += _count;
for (uint8 i = 0; i < n; i++) {
uint256 newBalance = (value * receiverPercentages[i]) /
oneHundred;
currentTeamBalance[i] += newBalance;
if (i == n - 1) {
_assignCommunityBalance(newBalance);
}
}
return;
}
currentMaxTokensBeforeWithdraw = 0;
// the community funds are not sent automatically
for (uint8 i = 0; i < receiverAddresses.length; i++) {
uint256 valueToSend = (value * receiverPercentages[i]) / oneHundred;
if (i == n - 1) {
_assignCommunityBalance(valueToSend);
} else {
valueToSend += currentTeamBalance[i];
currentTeamBalance[i] = 0;
sendValueTo(receiverAddresses[i], valueToSend);
}
}
}
/**
* @dev Distribute the community percent to communityWallet/charity/marketing/reserve
* @param newBalance to distribute
*/
function _assignCommunityBalance(uint256 newBalance) private {
comunityTotalBalanceEarned[0] +=
(newBalance * percentCommunity) /
oneHundred**2;
comunityTotalBalanceEarned[2] +=
(newBalance * percentCharity) /
oneHundred**2;
comunityTotalBalanceEarned[1] +=
(newBalance * percentMarketing) /
oneHundred**2;
comunityTotalBalanceEarned[3] +=
(newBalance * percentReserve) /
oneHundred**2;
}
}