// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)pragmasolidity ^0.8.0;/**
* @dev Collection of functions related to the address type
*/libraryAddress{
/**
* @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
* ====
*/functionisContract(address account) internalviewreturns (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].
*/functionsendValue(addresspayable 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._
*/functionfunctionCall(address target, bytesmemory data) internalreturns (bytesmemory) {
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._
*/functionfunctionCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalreturns (bytesmemory) {
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._
*/functionfunctionCallWithValue(address target,
bytesmemory data,
uint256 value
) internalreturns (bytesmemory) {
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._
*/functionfunctionCallWithValue(address target,
bytesmemory data,
uint256 value,
stringmemory errorMessage
) internalreturns (bytesmemory) {
require(address(this).balance>= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytesmemory 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._
*/functionfunctionStaticCall(address target, bytesmemory data) internalviewreturns (bytesmemory) {
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._
*/functionfunctionStaticCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalviewreturns (bytesmemory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytesmemory 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._
*/functionfunctionDelegateCall(address target, bytesmemory data) internalreturns (bytesmemory) {
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._
*/functionfunctionDelegateCall(address target,
bytesmemory data,
stringmemory errorMessage
) internalreturns (bytesmemory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytesmemory 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._
*/functionverifyCallResult(bool success,
bytesmemory returndata,
stringmemory errorMessage
) internalpurereturns (bytesmemory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if presentif (returndata.length>0) {
// The easiest way to bubble the revert reason is using memory via assemblyassembly {
let returndata_size :=mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
Contract Source Code
File 2 of 13: AnonymiceLibrary.sol
pragmasolidity ^0.8.7;libraryAnonymiceLibrary{
stringinternalconstant TABLE ="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
functionencode(bytesmemory data) internalpurereturns (stringmemory) {
if (data.length==0) return"";
// load the table into memorystringmemory table = TABLE;
// multiply by 4/3 rounded upuint256 encodedLen =4* ((data.length+2) /3);
// add some extra buffer at the end required for the writingstringmemory result =newstring(encodedLen +32);
assembly {
// set the actual output lengthmstore(result, encodedLen)
// prepare the lookup tablelet tablePtr :=add(table, 1)
// input ptrlet dataPtr := data
let endPtr :=add(dataPtr, mload(data))
// result ptr, jump over lengthlet resultPtr :=add(result, 32)
// run over the input, 3 bytes at a timefor {
} lt(dataPtr, endPtr) {
} {
dataPtr :=add(dataPtr, 3)
// read 3 byteslet input :=mload(dataPtr)
// write 4 charactersmstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(18, input), 0x3F))))
)
resultPtr :=add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(12, input), 0x3F))))
)
resultPtr :=add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(shr(6, input), 0x3F))))
)
resultPtr :=add(resultPtr, 1)
mstore(
resultPtr,
shl(248, mload(add(tablePtr, and(input, 0x3F))))
)
resultPtr :=add(resultPtr, 1)
}
// padding with '='switchmod(mload(data), 3)
case1 {
mstore(sub(resultPtr, 2), shl(240, 0x3d3d))
}
case2 {
mstore(sub(resultPtr, 1), shl(248, 0x3d))
}
}
return result;
}
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/functiontoString(uint256 value) internalpurereturns (stringmemory) {
if (value ==0) {
return"0";
}
uint256 temp = value;
uint256 digits;
while (temp !=0) {
digits++;
temp /=10;
}
bytesmemory buffer =newbytes(digits);
while (value !=0) {
digits -=1;
buffer[digits] =bytes1(uint8(48+uint256(value %10)));
value /=10;
}
returnstring(buffer);
}
functionparseInt(stringmemory _a)
internalpurereturns (uint8 _parsedInt)
{
bytesmemory bresult =bytes(_a);
uint8 mint =0;
for (uint8 i =0; i < bresult.length; i++) {
if (
(uint8(uint8(bresult[i])) >=48) &&
(uint8(uint8(bresult[i])) <=57)
) {
mint *=10;
mint +=uint8(bresult[i]) -48;
}
}
return mint;
}
functionsubstring(stringmemory str,
uint256 startIndex,
uint256 endIndex
) internalpurereturns (stringmemory) {
bytesmemory strBytes =bytes(str);
bytesmemory result =newbytes(endIndex - startIndex);
for (uint256 i = startIndex; i < endIndex; i++) {
result[i - startIndex] = strBytes[i];
}
returnstring(result);
}
functionisContract(address account) internalviewreturns (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;
}
}
Contract Source Code
File 3 of 13: Context.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)pragmasolidity ^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.
*/abstractcontractContext{
function_msgSender() internalviewvirtualreturns (address) {
returnmsg.sender;
}
function_msgData() internalviewvirtualreturns (bytescalldata) {
returnmsg.data;
}
}
Contract Source Code
File 4 of 13: ERC165.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)pragmasolidity ^0.8.0;import"./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/abstractcontractERC165isIERC165{
/**
* @dev See {IERC165-supportsInterface}.
*/functionsupportsInterface(bytes4 interfaceId) publicviewvirtualoverridereturns (bool) {
return interfaceId ==type(IERC165).interfaceId;
}
}
Contract Source Code
File 5 of 13: ERC721.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (token/ERC721/ERC721.sol)pragmasolidity ^0.8.0;import"./IERC721.sol";
import"./IERC721Receiver.sol";
import"./extensions/IERC721Metadata.sol";
import"../../utils/Address.sol";
import"../../utils/Context.sol";
import"../../utils/Strings.sol";
import"../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/contractERC721isContext, ERC165, IERC721, IERC721Metadata{
usingAddressforaddress;
usingStringsforuint256;
// Token namestringprivate _name;
// Token symbolstringprivate _symbol;
// Mapping from token ID to owner addressmapping(uint256=>address) private _owners;
// Mapping owner address to token countmapping(address=>uint256) private _balances;
// Mapping from token ID to approved addressmapping(uint256=>address) private _tokenApprovals;
// Mapping from owner to operator approvalsmapping(address=>mapping(address=>bool)) private _operatorApprovals;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/constructor(stringmemory name_, stringmemory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/functionsupportsInterface(bytes4 interfaceId) publicviewvirtualoverride(ERC165, IERC165) returns (bool) {
return
interfaceId ==type(IERC721).interfaceId||
interfaceId ==type(IERC721Metadata).interfaceId||super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/functionbalanceOf(address owner) publicviewvirtualoverridereturns (uint256) {
require(owner !=address(0), "ERC721: balance query for the zero address");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/functionownerOf(uint256 tokenId) publicviewvirtualoverridereturns (address) {
address owner = _owners[tokenId];
require(owner !=address(0), "ERC721: owner query for nonexistent token");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/functionname() publicviewvirtualoverridereturns (stringmemory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/functionsymbol() publicviewvirtualoverridereturns (stringmemory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/functiontokenURI(uint256 tokenId) publicviewvirtualoverridereturns (stringmemory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
stringmemory baseURI = _baseURI();
returnbytes(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() internalviewvirtualreturns (stringmemory) {
return"";
}
/**
* @dev See {IERC721-approve}.
*/functionapprove(address to, uint256 tokenId) publicvirtualoverride{
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}.
*/functiongetApproved(uint256 tokenId) publicviewvirtualoverridereturns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/functionsetApprovalForAll(address operator, bool approved) publicvirtualoverride{
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/functionisApprovedForAll(address owner, address operator) publicviewvirtualoverridereturns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/functiontransferFrom(addressfrom,
address to,
uint256 tokenId
) publicvirtualoverride{
//solhint-disable-next-line max-line-lengthrequire(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId
) publicvirtualoverride{
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId,
bytesmemory _data
) publicvirtualoverride{
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(addressfrom,
address to,
uint256 tokenId,
bytesmemory _data
) internalvirtual{
_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) internalviewvirtualreturns (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) internalviewvirtualreturns (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) internalvirtual{
_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,
bytesmemory _data
) internalvirtual{
_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) internalvirtual{
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) internalvirtual{
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(addressfrom,
address to,
uint256 tokenId
) internalvirtual{
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) internalvirtual{
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits a {ApprovalForAll} event.
*/function_setApprovalForAll(address owner,
address operator,
bool approved
) internalvirtual{
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/function_checkOnERC721Received(addressfrom,
address to,
uint256 tokenId,
bytesmemory _data
) privatereturns (bool) {
if (to.isContract()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytesmemory reason) {
if (reason.length==0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
returntrue;
}
}
/**
* @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(addressfrom,
address to,
uint256 tokenId
) internalvirtual{}
}
Contract Source Code
File 6 of 13: IERC165.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)pragmasolidity ^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}.
*/interfaceIERC165{
/**
* @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.
*/functionsupportsInterface(bytes4 interfaceId) externalviewreturns (bool);
}
Contract Source Code
File 7 of 13: IERC721.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)pragmasolidity ^0.8.0;import"../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/interfaceIERC721isIERC165{
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/eventTransfer(addressindexedfrom, addressindexed to, uint256indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/eventApproval(addressindexed owner, addressindexed approved, uint256indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/eventApprovalForAll(addressindexed owner, addressindexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/functionbalanceOf(address owner) externalviewreturns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functionownerOf(uint256 tokenId) externalviewreturns (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.
*/functionsafeTransferFrom(addressfrom,
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.
*/functiontransferFrom(addressfrom,
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.
*/functionapprove(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functiongetApproved(uint256 tokenId) externalviewreturns (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.
*/functionsetApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/functionisApprovedForAll(address owner, address operator) externalviewreturns (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.
*/functionsafeTransferFrom(addressfrom,
address to,
uint256 tokenId,
bytescalldata data
) external;
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)pragmasolidity ^0.8.0;/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/interfaceIERC721Receiver{
/**
* @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`.
*/functiononERC721Received(address operator,
addressfrom,
uint256 tokenId,
bytescalldata data
) externalreturns (bytes4);
}
Contract Source Code
File 10 of 13: MerkleProof.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/cryptography/MerkleProof.sol)pragmasolidity ^0.8.0;/**
* @dev These functions deal with verification of Merkle Trees proofs.
*
* The proofs can be generated using the JavaScript library
* https://github.com/miguelmota/merkletreejs[merkletreejs].
* Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
*
* See `test/utils/cryptography/MerkleProof.test.js` for some examples.
*/libraryMerkleProof{
/**
* @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.
*/functionverify(bytes32[] memory proof,
bytes32 root,
bytes32 leaf
) internalpurereturns (bool) {
return processProof(proof, leaf) == root;
}
/**
* @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
* from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
* hash matches the root of the tree. When processing the proof, the pairs
* of leafs & pre-images are assumed to be sorted.
*
* _Available since v4.4._
*/functionprocessProof(bytes32[] memory proof, bytes32 leaf) internalpurereturns (bytes32) {
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));
}
}
return computedHash;
}
}
Contract Source Code
File 11 of 13: Ownable.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)pragmasolidity ^0.8.0;import"../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/abstractcontractOwnableisContext{
addressprivate _owner;
eventOwnershipTransferred(addressindexed previousOwner, addressindexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Returns the address of the current owner.
*/functionowner() publicviewvirtualreturns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/modifieronlyOwner() {
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.
*/functionrenounceOwnership() publicvirtualonlyOwner{
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/functiontransferOwnership(address newOwner) publicvirtualonlyOwner{
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) internalvirtual{
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
Contract Source Code
File 12 of 13: SnowCrash.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.7;import"./AnonymiceLibrary.sol";
import"@openzeppelin/contracts/token/ERC721/ERC721.sol";
import"@openzeppelin/contracts/access/Ownable.sol";
import"@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
contractSnowCrashisERC721, Ownable{
/*
______ __ __ ______ __ __ ______ ______ ______ ______ __ __
/\ ___\ /\ "-.\ \ /\ __ \ /\ \ _ \ \ /\ ___\ /\ == \ /\ __ \ /\ ___\ /\ \_\ \
\ \___ \ \ \ \-. \ \ \ \/\ \ \ \ \/ ".\ \ \ \ \____ \ \ __< \ \ __ \ \ \___ \ \ \ __ \
\/\_____\ \ \_\\"\_\ \ \_____\ \ \__/".~\_\ \ \_____\ \ \_\ \_\ \ \_\ \_\ \/\_____\ \ \_\ \_\
\/_____/ \/_/ \/_/ \/_____/ \/_/ \/_/ \/_____/ \/_/ /_/ \/_/\/_/ \/_____/ \/_/\/_/
*/usingAnonymiceLibraryforuint8;
structTrait {
string traitName;
string traitType;
}
//Mappingsmapping(uint256=> Trait[]) public traitTypes;
mapping(uint256=>string) internal tokenIdToHash;
mapping(address=>uint256) private lastWrite;
//Mint Checksmapping(address=>bool) addressFreeMinted;
mapping(address=>bool) contributorMints;
uint256 contributorCount =0;
uint256 regularCount =0;
uint256public totalSupply =0;
//uint256suint256constant MAX_SUPPLY =256;
uint256constant MINT_COST =0.0256ether;
uint256constant PUBLIC_START_BLOCK =14651420;
uint256 SEED_NONCE =0;
//minting flagbool ogMinted =false;
boolpublic MINTING_LIVE =false;
//uint arraysuint16[][8] TIERS;
//p5js urlstring p5jsUrl;
string p5jsIntegrity;
string imageUrl;
string animationUrl;
bytes32constant whitelistRoot =0x2cd756bd043061e7f4cd5b02ccfbd86ac3965d315356463f26afa7c6915ab14f;
constructor() payableERC721("SnwCrsh", "SNOW") {
//Declare all the rarity tiers//col
TIERS[0] = [1600, 1200, 550, 550, 1200, 700, 1600, 700, 1200, 700];
//border size
TIERS[1] = [1000, 4000, 4000, 1000];
//noise Max
TIERS[2] = [1000, 2000, 4000, 3000];
//speed
TIERS[3] = [1000, 5500, 2500, 1000];
//Slice thickness
TIERS[4] = [2500, 3500, 2500, 1500];
//secCol
TIERS[5] = [7000, 3000];
//charset
TIERS[6] = [1000, 2500, 3000, 2500, 500, 500];
//flowType
TIERS[7] = [8500, 1500];
}
//prevents someone calling read functions the same block they mintmodifierdisallowIfStateIsChanging() {
require(
owner() ==msg.sender|| lastWrite[msg.sender] <block.number,
"not so fast!"
);
_;
}
/*
__ __ __ __ __ ______ __ __ __ ______
/\ "-./ \ /\ \ /\ "-.\ \ /\__ _\ /\ \ /\ "-.\ \ /\ ___\
\ \ \-./\ \ \ \ \ \ \ \-. \ \/_/\ \/ \ \ \ \ \ \-. \ \ \ \__ \
\ \_\ \ \_\ \ \_\ \ \_\\"\_\ \ \_\ \ \_\ \ \_\\"\_\ \ \_____\
\/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_____/
*//**
* @dev Converts a digit from 0 - 10000 into its corresponding rarity based on the given rarity tier.
* @param _randinput The input from 0 - 10000 to use for rarity gen.
* @param _rarityTier The tier to use.
*/functionrarityGen(uint256 _randinput, uint8 _rarityTier)
internalviewreturns (uint8)
{
uint16 currentLowerBound =0;
for (uint8 i =0; i < TIERS[_rarityTier].length; i++) {
uint16 thisPercentage = TIERS[_rarityTier][i];
if (
_randinput >= currentLowerBound &&
_randinput < currentLowerBound + thisPercentage
) return i;
currentLowerBound = currentLowerBound + thisPercentage;
}
revert();
}
/**
* @dev Generates a 11 digit hash from a tokenId, address, and random number.
* @param _t The token id to be used within the hash.
* @param _a The address to be used within the hash.
* @param _c The custom nonce to be used within the hash.
*/functionhash(uint256 _t,
address _a,
uint256 _c
) internalreturns (stringmemory) {
require(_c <11);
// This will generate a 11 character string.// The first 2 digits are the palette.stringmemory currentHash ="";
for (uint8 i =0; i <8; i++) {
SEED_NONCE++;
uint16 _randinput =uint16(
uint256(
keccak256(
abi.encodePacked(
block.timestamp,
block.difficulty,
_t,
_a,
_c,
SEED_NONCE
)
)
) %10000
);
currentHash =string(
abi.encodePacked(
currentHash,
rarityGen(_randinput, i).toString()
)
);
}
return currentHash;
}
/**
* @dev Mint internal, this is to avoid code duplication.
*/functionmintInternal() internal{
require(
MINTING_LIVE ==true||msg.sender== owner(),
"Minting not live"
);
uint256 _totalSupply = totalSupply;
require(_totalSupply < MAX_SUPPLY);
require(!AnonymiceLibrary.isContract(msg.sender));
require(regularCount <241);
uint256 thisTokenId = _totalSupply;
tokenIdToHash[thisTokenId] = hash(thisTokenId, msg.sender, 0);
lastWrite[msg.sender] =block.number;
++totalSupply;
_mint(msg.sender, thisTokenId);
}
functionmintOgBatch(address[] memory _addresses)
externalpayableonlyOwner{
require(ogMinted ==false);
require(_addresses.length==10);
for (uint256 i =0; i <10; i++) {
uint256 thisTokenId = i;
tokenIdToHash[thisTokenId] = hash(thisTokenId, _addresses[i], 0);
_mint(_addresses[i], thisTokenId);
}
totalSupply =10;
regularCount =10;
ogMinted =true;
}
/**
* @dev Mints new tokens.
*/functionmintFreeSnowCrash(address account, bytes32[] calldata merkleProof)
external{
bytes32 node =keccak256(abi.encodePacked(account));
require(MerkleProof.verify(merkleProof, whitelistRoot, node));
require(
addressFreeMinted[msg.sender] !=true,
"Address already free minted"
);
addressFreeMinted[msg.sender] =true;
++regularCount;
return mintInternal();
}
functionmintPaidSnowCrash() externalpayable{
require(msg.value== MINT_COST, "Insufficient ETH sent");
require(block.number> PUBLIC_START_BLOCK);
++regularCount;
return mintInternal();
}
functionmintCircolorsContributor() external{
require(contributorMints[msg.sender] ==true);
require(contributorCount <16);
contributorMints[msg.sender] =false;
++contributorCount;
return mintInternal();
}
/*
______ ______ ______ _____ __ __ __ ______
/\ == \ /\ ___\ /\ __ \ /\ __-. /\ \ /\ "-.\ \ /\ ___\
\ \ __< \ \ __\ \ \ __ \ \ \ \/\ \ \ \ \ \ \ \-. \ \ \ \__ \
\ \_\ \_\ \ \_____\ \ \_\ \_\ \ \____- \ \_\ \ \_\\"\_\ \ \_____\
\/_/ /_/ \/_____/ \/_/\/_/ \/____/ \/_/ \/_/ \/_/ \/_____/
*//**
* @dev Hash to HTML function
*/functionhashToHTML(stringmemory _hash, uint256 _tokenId)
externalviewdisallowIfStateIsChangingreturns (stringmemory)
{
stringmemory htmlString =string(
abi.encodePacked(
"data:text/html,%3Chtml%3E%3Chead%3E%3Cscript%20src%3D%22",
p5jsUrl,
"%22%20integrity%3D%22",
p5jsIntegrity,
"%22%20crossorigin%3D%22anonymous%22%3E%3C%2Fscript%3E%3C%2Fhead%3E%3Cbody%3E%3Cscript%3Evar%20tokenId%3D",
AnonymiceLibrary.toString(_tokenId),
"%3Bvar%20hash%3D%22",
_hash,
"%22%3B"
)
);
htmlString =string(
abi.encodePacked(
htmlString,
"let%20f%3D0%3Blet%20cSet%3D%5B%22%C3%91%2450c-%22%2C%22%4097%3F%3B%2C%22%2C%22%238%C2%A3%21%3A.%22%2C%22%E2%82%A942a%2B_%22%2C%22%25gm%3B%29%27%22%2C%220101%2F%20%22%5D%3Blet%20xoff1%2Cyoff1%2Cxyoff%2Cn%2Ccols%3D%5B0%2C1%2C2%2C4%2C5%2C6%2C7%2C8%2C9%2C11%5D%2CfSizes%3D%5B12.5%2C9%2C6%2C4.7%5D%2CnoiseEnd%3D%5B.001%2C.002%2C.005%2C.008%5D%2Cspds%3D%5B.7%2C1.2%2C2.5%2C2.6%5D%2CtextCol%3D%5B0%2C100%5D%2CcSprd%3D%5B.06%2C.12%2C.18%2C.24%5D%2Ct%3D0%2CsT%3D0%2CcT%3D0%2Clp%3D%210%2Crv%3D%211%2Cw%3D500%2Ch%3D500%3Bfunction%20setup%28%29%7BcreateCanvas%28w%2Ch%29%2CcolorMode%28HSB%2C360%2C100%2C100%29%2CtextFont%28%22Courier%22%29%2CnoiseSeed%28tokenId%29%2CcO%3D30%2Acols%5BparseInt%28hash.substring%280%2C1%29%29%5D%2CfW%3Dwidth%2FfSizes%5BparseInt%28hash.substring%281%2C2%29%29%5D%2CfH%3Dheight%2FfSizes%5BparseInt%28hash.substring%281%2C2%29%29%5D%2Cend%3DnoiseEnd%5BparseInt%28hash.substring%282%2C3%29%29%5D%2Csp%3Dspds%5BparseInt%28hash.substring%283%2C4%29%29%5D%2F%28fW%2BfH%29%2F3%2Cs%3DcSprd%5BparseInt%28hash.substring%284%2C5%29%29%5D%2CbT%3DtextCol%5BparseInt%28hash.substring%285%2C6%29%29%5D%2Cc%3DparseInt%28hash.substring%286%2C7%29%29%2CfTyp%3DparseInt%28hash.substring%287%2C8%29%29%2CsO%3D80%2C100%3D%3DbT%3FbO%3D85%3AbO%3D100%2Cfill%28cT%2CsT%2CbT%29%7Dfunction%20draw%28%29%7Bbackground%28cO%2CsO%2CbO%29%3Bfor%28let%20e%3DfW%3Be%3C%3Dwidth-fW%3Be%2B%3D10%29for%28let%20o%3DfH%3Bo%3C%3Dheight-fH%3Bo%2B%3D10%29xoff1%3Dmap%28e%2CfW%2Cwidth%2C0%2Cend%29%2Cyoff1%3Dmap%28o%2CfH%2Cheight%2C0%2Cend%29%2Cxyoff%3Dxoff1%2Byoff1%2Cn%3Dnoise%28e%2Axyoff%2Bt%2Co%2Axyoff%2Bt%2Cf%29%2CnoStroke%28%29%2Cfill%28cT%2CsT%2CbT%29%2Cn%3E.5%2B.8%2As%7C%7Cn%3C.5-.8%2As%3Ftext%28cSet%5Bc%5D%5B0%5D%2Ce%2Co%29%3An%3E.5%2B.65%2As%7C%7Cn%3C.5-.65%2As%3Ftext%28cSet%5Bc%5D%5B1%5D%2Ce%2Co%29%3An%3E.5%2B.5%2As%7C%7Cn%3C.5-.5%2As%3Ftext%28cSet%5Bc%5D%5B2%5D%2Ce%2Co%29%3An%3E.5%2B.35%2As%7C%7Cn%3C.5-.35%2As%3Ftext%28cSet%5Bc%5D%5B3%5D%2Ce%2Co%29%3An%3E.5%2B.2%2As%7C%7Cn%3C.5-.2%2As%3Ftext%28cSet%5Bc%5D%5B4%5D%2Ce%2Co%29%3Atext%28cSet%5Bc%5D%5B5%5D%2Ce%2Co%29%3B0%3D%3Drv%3F0%3D%3DfTyp%3Ft%2B%3Dsp%3A%28f%2B%3Dsp%2Ct%2B%3Dsp%2F10%29%3A0%3D%3DfTyp%3Ft-%3Dsp%3A%28f-%3Dsp%2Ct-%3Dsp%2F10%29%2Ctext%28%22%23%22%2BtokenId.toString%28%29%2C10%2Cheight-10%29%7Dfunction%20mouseClicked%28%29%7BcB%3DcO%2CsB%3DsO%2CbB%3DbO%2CcO%3DcT%2CsO%3DsT%2CbO%3DbT%2CcT%3DcB%2CsT%3DsB%2CbT%3DbB%7Dfunction%20keyPressed%28%29%7B32%3D%3D%3DkeyCode%26%261%3D%3Dlp%3F%28noLoop%28%29%2Clp%3D%211%29%3AkeyCode%3D%3D%3DLEFT_ARROW%3F%28rv%3D%211%2Cloop%28%29%2Clp%3D%210%29%3AkeyCode%3D%3D%3DRIGHT_ARROW%3F%28rv%3D%210%2Cloop%28%29%2Clp%3D%210%29%3AkeyCode%3D%3D%3DUP_ARROW%3FresizeCanvas%28750%2C250%29%3AkeyCode%3D%3D%3DDOWN_ARROW%3FresizeCanvas%28500%2C500%29%3A16%3D%3D%3DkeyCode%3FresizeCanvas%28350%2C600%29%3A%28loop%28%29%2Clp%3D%210%29%7D%3C%2Fscript%3E%3C%2Fbody%3E%3C%2Fhtml%3E"
)
);
return htmlString;
}
/**
* @dev Hash to metadata function
*/functionhashToMetadata(stringmemory _hash)
publicviewdisallowIfStateIsChangingreturns (stringmemory)
{
stringmemory metadataString;
for (uint8 i =0; i <8; i++) {
uint8 thisTraitIndex = AnonymiceLibrary.parseInt(
AnonymiceLibrary.substring(_hash, i, i +1)
);
metadataString =string(
abi.encodePacked(
metadataString,
'{"trait_type":"',
traitTypes[i][thisTraitIndex].traitType,
'","value":"',
traitTypes[i][thisTraitIndex].traitName,
'"}'
)
);
if (i !=7)
metadataString =string(abi.encodePacked(metadataString, ","));
}
returnstring(abi.encodePacked("[", metadataString, "]"));
}
/**
* @dev Returns the SVG and metadata for a token Id
* @param _tokenId The tokenId to return the SVG and metadata for.
*/functiontokenURI(uint256 _tokenId)
publicviewoverridereturns (stringmemory)
{
require(_exists(_tokenId));
stringmemory tokenHash = _tokenIdToHash(_tokenId);
stringmemory description ='", "description": "256 ASCII SnowCrashes. Metadata & images mirrored on chain permanently and loops infinitely",';
stringmemory encodedTokenId = AnonymiceLibrary.encode(
bytes(string(abi.encodePacked(AnonymiceLibrary.toString(_tokenId))))
);
stringmemory encodedHash = AnonymiceLibrary.encode(
bytes(string(abi.encodePacked(tokenHash)))
);
returnstring(
abi.encodePacked(
"data:application/json;base64,",
AnonymiceLibrary.encode(
bytes(
string(
abi.encodePacked(
'{"name": "SnowCrash #',
AnonymiceLibrary.toString(_tokenId),
description,
'"animation_url":"',
animationUrl,
encodedTokenId,
"&t=",
encodedHash,
'","image":"',
imageUrl,
AnonymiceLibrary.toString(_tokenId),
"&t=",
tokenHash,
'","attributes":',
hashToMetadata(tokenHash),
"}"
)
)
)
)
)
);
}
/**
* @dev Returns a hash for a given tokenId
* @param _tokenId The tokenId to return the hash for.
*/function_tokenIdToHash(uint256 _tokenId)
publicviewdisallowIfStateIsChangingreturns (stringmemory)
{
stringmemory tokenHash = tokenIdToHash[_tokenId];
return tokenHash;
}
/*
______ __ __ __ __ ______ ______
/\ __ \ /\ \ _ \ \ /\ "-.\ \ /\ ___\ /\ == \
\ \ \/\ \ \ \ \/ ".\ \ \ \ \-. \ \ \ __\ \ \ __<
\ \_____\ \ \__/".~\_\ \ \_\\"\_\ \ \_____\ \ \_\ \_\
\/_____/ \/_/ \/_/ \/_/ \/_/ \/_____/ \/_/ /_/
/**
* @dev Add a trait type
* @param _traitTypeIndex The trait type index
* @param traits Array of traits to add
*/functionaddTraitType(uint256 _traitTypeIndex, Trait[] memory traits)
externalpayableonlyOwner{
for (uint256 i =0; i < traits.length; i++) {
traitTypes[_traitTypeIndex].push(
Trait(traits[i].traitName, traits[i].traitType)
);
}
return;
}
functionaddContributorMint(address _account) externalpayableonlyOwner{
contributorMints[_account] =true;
}
functionflipMintingSwitch() externalpayableonlyOwner{
MINTING_LIVE =!MINTING_LIVE;
}
/**
* @dev Sets the p5js url
* @param _p5jsUrl The address of the p5js file hosted on CDN
*/functionsetJsAddress(stringmemory _p5jsUrl) externalpayableonlyOwner{
p5jsUrl = _p5jsUrl;
}
/**
* @dev Sets the p5js resource integrity
* @param _p5jsIntegrity The hash of the p5js file (to protect w subresource integrity)
*/functionsetJsIntegrity(stringmemory _p5jsIntegrity)
externalpayableonlyOwner{
p5jsIntegrity = _p5jsIntegrity;
}
/**
* @dev Sets the base image url
* @param _imageUrl The base url for image field
*/functionsetImageUrl(stringmemory _imageUrl) externalpayableonlyOwner{
imageUrl = _imageUrl;
}
functionsetAnimationUrl(stringmemory _animationUrl)
externalpayableonlyOwner{
animationUrl = _animationUrl;
}
functionwithdraw() externalpayableonlyOwner{
(bool success, ) =payable(msg.sender).call{
value: address(this).balance
}("");
require(success);
}
}
Contract Source Code
File 13 of 13: Strings.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)pragmasolidity ^0.8.0;/**
* @dev String operations.
*/libraryStrings{
bytes16privateconstant _HEX_SYMBOLS ="0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/functiontoString(uint256 value) internalpurereturns (stringmemory) {
// Inspired by OraclizeAPI's implementation - MIT licence// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.solif (value ==0) {
return"0";
}
uint256 temp = value;
uint256 digits;
while (temp !=0) {
digits++;
temp /=10;
}
bytesmemory buffer =newbytes(digits);
while (value !=0) {
digits -=1;
buffer[digits] =bytes1(uint8(48+uint256(value %10)));
value /=10;
}
returnstring(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/functiontoHexString(uint256 value) internalpurereturns (stringmemory) {
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.
*/functiontoHexString(uint256 value, uint256 length) internalpurereturns (stringmemory) {
bytesmemory buffer =newbytes(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");
returnstring(buffer);
}
}