// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)pragmasolidity ^0.8.1;/**
* @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
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/functionisContract(address account) internalviewreturns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0// for contracts in construction, since the code is only stored at the end// of the constructor execution.return account.code.length>0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/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 assembly/// @solidity memory-safe-assemblyassembly {
let returndata_size :=mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
Contract Source Code
File 2 of 22: 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;
}
}
// 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 22: ERC721.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (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: address zero is not a valid owner");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/functionownerOf(uint256 tokenId) publicviewvirtualoverridereturns (address) {
address owner = _owners[tokenId];
require(owner !=address(0), "ERC721: invalid token ID");
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) {
_requireMinted(tokenId);
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 overridden 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 token owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/functiongetApproved(uint256 tokenId) publicviewvirtualoverridereturns (address) {
_requireMinted(tokenId);
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: caller is not token 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: caller is not token 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) {
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/function_safeMint(address to, uint256 tokenId) 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);
_afterTokenTransfer(address(0), to, tokenId);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/function_burn(uint256 tokenId) 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);
_afterTokenTransfer(owner, address(0), tokenId);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/function_transfer(addressfrom,
address to,
uint256 tokenId
) internalvirtual{
require(ERC721.ownerOf(tokenId) ==from, "ERC721: transfer from incorrect owner");
require(to !=address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_balances[from] -=1;
_balances[to] +=1;
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {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 an {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 Reverts if the `tokenId` has not been minted yet.
*/function_requireMinted(uint256 tokenId) internalviewvirtual{
require(_exists(tokenId), "ERC721: invalid token ID");
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/function_checkOnERC721Received(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 {
/// @solidity memory-safe-assemblyassembly {
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{}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/function_afterTokenTransfer(addressfrom,
address to,
uint256 tokenId
) internalvirtual{}
}
Contract Source Code
File 6 of 22: ERC721URIStorage.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/extensions/ERC721URIStorage.sol)pragmasolidity ^0.8.0;import"../ERC721.sol";
/**
* @dev ERC721 token with storage based token URI management.
*/abstractcontractERC721URIStorageisERC721{
usingStringsforuint256;
// Optional mapping for token URIsmapping(uint256=>string) private _tokenURIs;
/**
* @dev See {IERC721Metadata-tokenURI}.
*/functiontokenURI(uint256 tokenId) publicviewvirtualoverridereturns (stringmemory) {
_requireMinted(tokenId);
stringmemory _tokenURI = _tokenURIs[tokenId];
stringmemory base = _baseURI();
// If there is no base URI, return the token URI.if (bytes(base).length==0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).if (bytes(_tokenURI).length>0) {
returnstring(abi.encodePacked(base, _tokenURI));
}
returnsuper.tokenURI(tokenId);
}
/**
* @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/function_setTokenURI(uint256 tokenId, stringmemory _tokenURI) internalvirtual{
require(_exists(tokenId), "ERC721URIStorage: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev See {ERC721-_burn}. This override additionally checks to see if a
* token-specific URI was set for the token, and if so, it deletes the token URI from
* the storage mapping.
*/function_burn(uint256 tokenId) internalvirtualoverride{
super._burn(tokenId);
if (bytes(_tokenURIs[tokenId]).length!=0) {
delete _tokenURIs[tokenId];
}
}
}
Contract Source Code
File 7 of 22: IDuelPepes.sol
interfaceIDuelPepes{
structDuel {
// unique identifier for duel (salt)bytes32 identifier;
// 0 index = creator, 1 index = challengeraddress[2] duellors;
// Wager amount in WETHuint wager;
// Fees at the time of duel creationuint fees;
// Initial hashed move set signature when creating duelbytes initialMovesSignature;
// Moves selected by duel participants// 0 index = creator, 1 index = challengeruint[5][2] moves;
// Who won the duelbool isCreatorWinner;
// 0 index - Time created, 1 index - time challenged, 2 - time decideduint[3] timestamps;
}
enumMoves {
// Accurate [0, 1, 0]
Punch,
// Strength [2, 0, 0]
Kick,
// Defense [0, 0, 3]
Block,
// Special attack [3, 0, 0]
Special
}
functiongetDuel(uint _id)
externalviewreturns (Duel memory);
}
// 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 10 of 22: IERC721.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (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`.
*
* 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;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/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 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 the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/functiongetApproved(uint256 tokenId) externalviewreturns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/functionisApprovedForAll(address owner, address operator) externalviewreturns (bool);
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.6.0) (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 `IERC721Receiver.onERC721Received.selector`.
*/functiononERC721Received(address operator,
addressfrom,
uint256 tokenId,
bytescalldata data
) externalreturns (bytes4);
}
Contract Source Code
File 13 of 22: ILayerZeroEndpoint.sol
// SPDX-License-Identifier: MITpragmasolidity >=0.5.0;import"./ILayerZeroUserApplicationConfig.sol";
interfaceILayerZeroEndpointisILayerZeroUserApplicationConfig{
// @notice send a LayerZero message to the specified address at a LayerZero endpoint.// @param _dstChainId - the destination chain identifier// @param _destination - the address on destination chain (in bytes). address length/format may vary by chains// @param _payload - a custom bytes payload to send to the destination contract// @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address// @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction// @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destinationfunctionsend(uint16 _dstChainId, bytescalldata _destination, bytescalldata _payload, addresspayable _refundAddress, address _zroPaymentAddress, bytescalldata _adapterParams) externalpayable;
// @notice used by the messaging library to publish verified payload// @param _srcChainId - the source chain identifier// @param _srcAddress - the source contract (as bytes) at the source chain// @param _dstAddress - the address on destination chain// @param _nonce - the unbound message ordering nonce// @param _gasLimit - the gas limit for external contract execution// @param _payload - verified payload to send to the destination contractfunctionreceivePayload(uint16 _srcChainId, bytescalldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytescalldata _payload) external;
// @notice get the inboundNonce of a lzApp from a source chain which could be EVM or non-EVM chain// @param _srcChainId - the source chain identifier// @param _srcAddress - the source chain contract addressfunctiongetInboundNonce(uint16 _srcChainId, bytescalldata _srcAddress) externalviewreturns (uint64);
// @notice get the outboundNonce from this source chain which, consequently, is always an EVM// @param _srcAddress - the source chain contract addressfunctiongetOutboundNonce(uint16 _dstChainId, address _srcAddress) externalviewreturns (uint64);
// @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery// @param _dstChainId - the destination chain identifier// @param _userApplication - the user app address on this EVM chain// @param _payload - the custom message to send over LayerZero// @param _payInZRO - if false, user app pays the protocol fee in native token// @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChainfunctionestimateFees(uint16 _dstChainId, address _userApplication, bytescalldata _payload, bool _payInZRO, bytescalldata _adapterParam) externalviewreturns (uint nativeFee, uint zroFee);
// @notice get this Endpoint's immutable source identifierfunctiongetChainId() externalviewreturns (uint16);
// @notice the interface to retry failed message on this Endpoint destination// @param _srcChainId - the source chain identifier// @param _srcAddress - the source chain contract address// @param _payload - the payload to be retriedfunctionretryPayload(uint16 _srcChainId, bytescalldata _srcAddress, bytescalldata _payload) external;
// @notice query if any STORED payload (message blocking) at the endpoint.// @param _srcChainId - the source chain identifier// @param _srcAddress - the source chain contract addressfunctionhasStoredPayload(uint16 _srcChainId, bytescalldata _srcAddress) externalviewreturns (bool);
// @notice query if the _libraryAddress is valid for sending msgs.// @param _userApplication - the user app address on this EVM chainfunctiongetSendLibraryAddress(address _userApplication) externalviewreturns (address);
// @notice query if the _libraryAddress is valid for receiving msgs.// @param _userApplication - the user app address on this EVM chainfunctiongetReceiveLibraryAddress(address _userApplication) externalviewreturns (address);
// @notice query if the non-reentrancy guard for send() is on// @return true if the guard is on. false otherwisefunctionisSendingPayload() externalviewreturns (bool);
// @notice query if the non-reentrancy guard for receive() is on// @return true if the guard is on. false otherwisefunctionisReceivingPayload() externalviewreturns (bool);
// @notice get the configuration of the LayerZero messaging library of the specified version// @param _version - messaging library version// @param _chainId - the chainId for the pending config change// @param _userApplication - the contract address of the user application// @param _configType - type of configuration. every messaging library has its own convention.functiongetConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) externalviewreturns (bytesmemory);
// @notice get the send() LayerZero messaging library version// @param _userApplication - the contract address of the user applicationfunctiongetSendVersion(address _userApplication) externalviewreturns (uint16);
// @notice get the lzReceive() LayerZero messaging library version// @param _userApplication - the contract address of the user applicationfunctiongetReceiveVersion(address _userApplication) externalviewreturns (uint16);
}
Contract Source Code
File 14 of 22: ILayerZeroReceiver.sol
// SPDX-License-Identifier: MITpragmasolidity >=0.5.0;interfaceILayerZeroReceiver{
// @notice LayerZero endpoint will invoke this function to deliver the message on the destination// @param _srcChainId - the source endpoint identifier// @param _srcAddress - the source sending contract address from the source chain// @param _nonce - the ordered message nonce// @param _payload - the signed payload is the UA bytes has encoded to be sentfunctionlzReceive(uint16 _srcChainId, bytescalldata _srcAddress, uint64 _nonce, bytescalldata _payload) external;
}
Contract Source Code
File 15 of 22: ILayerZeroUserApplicationConfig.sol
// SPDX-License-Identifier: MITpragmasolidity >=0.5.0;interfaceILayerZeroUserApplicationConfig{
// @notice set the configuration of the LayerZero messaging library of the specified version// @param _version - messaging library version// @param _chainId - the chainId for the pending config change// @param _configType - type of configuration. every messaging library has its own convention.// @param _config - configuration in the bytes. can encode arbitrary content.functionsetConfig(uint16 _version, uint16 _chainId, uint _configType, bytescalldata _config) external;
// @notice set the send() LayerZero messaging library version to _version// @param _version - new messaging library versionfunctionsetSendVersion(uint16 _version) external;
// @notice set the lzReceive() LayerZero messaging library version to _version// @param _version - new messaging library versionfunctionsetReceiveVersion(uint16 _version) external;
// @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload// @param _srcChainId - the chainId of the source chain// @param _srcAddress - the contract address of the source contract at the source chainfunctionforceResumeReceive(uint16 _srcChainId, bytescalldata _srcAddress) external;
}
Contract Source Code
File 16 of 22: IONFT721.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.7;import"@openzeppelin/contracts/token/ERC721/IERC721.sol";
/**
* @dev Interface of the ONFT standard
*/interfaceIONFT721isIERC721{
/**
* @dev estimate send token `_tokenId` to (`_dstChainId`, `_toAddress`)
* _dstChainId - L0 defined chain id to send tokens too
* _toAddress - dynamic bytes array which contains the address to whom you are sending tokens to on the dstChain
* _tokenId - token Id to transfer
* _useZro - indicates to use zro to pay L0 fees
* _adapterParams - flexible bytes array to indicate messaging adapter services in L0
*/functionestimateSendFee(uint16 _dstChainId, bytescalldata _toAddress, uint _tokenId, bool _useZro, bytescalldata _adapterParams) externalviewreturns (uint nativeFee, uint zroFee);
/**
* @dev send token `_tokenId` to (`_dstChainId`, `_toAddress`)
* `_toAddress` can be any size depending on the `dstChainId`.
* `_zroPaymentAddress` set to address(0x0) if not paying in ZRO (LayerZero Token)
* `_adapterParams` is a flexible bytes array to indicate messaging adapter services
*/functionsend(uint16 _dstChainId, bytescalldata _toAddress, uint _tokenId, addresspayable _refundAddress, address _zroPaymentAddress, bytescalldata _adapterParams) externalpayable;
/**
* @dev send token `_tokenId` to (`_dstChainId`, `_toAddress`) from `_from`
* `_toAddress` can be any size depending on the `dstChainId`.
* `_zroPaymentAddress` set to address(0x0) if not paying in ZRO (LayerZero Token)
* `_adapterParams` is a flexible bytes array to indicate messaging adapter services
*/functionsendFrom(address _from, uint16 _dstChainId, bytescalldata _toAddress, uint _tokenId, addresspayable _refundAddress, address _zroPaymentAddress, bytescalldata _adapterParams) externalpayable;
/**
* @dev Emitted when `_tokenId` are moved from the `_sender` to (`_dstChainId`, `_toAddress`)
* `_nonce` is the outbound nonce from
*/eventSendToChain(addressindexed _sender, uint16indexed _dstChainId, bytesindexed _toAddress, uint _tokenId, uint64 _nonce);
/**
* @dev Emitted when `_tokenId` are sent from `_srcChainId` to the `_toAddress` at this chain. `_nonce` is the inbound nonce.
*/eventReceiveFromChain(uint16 _srcChainId, address _toAddress, uint _tokenId, uint64 _nonce);
}
Contract Source Code
File 17 of 22: LzApp.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.0;import"@openzeppelin/contracts/access/Ownable.sol";
import"../interfaces/ILayerZeroReceiver.sol";
import"../interfaces/ILayerZeroUserApplicationConfig.sol";
import"../interfaces/ILayerZeroEndpoint.sol";
/*
* a generic LzReceiver implementation
*/abstractcontractLzAppisOwnable, ILayerZeroReceiver, ILayerZeroUserApplicationConfig{
ILayerZeroEndpoint publicimmutable lzEndpoint;
mapping(uint16=>bytes) public trustedRemoteLookup;
eventSetTrustedRemote(uint16 _srcChainId, bytes _srcAddress);
constructor(address _endpoint) {
lzEndpoint = ILayerZeroEndpoint(_endpoint);
}
functionlzReceive(uint16 _srcChainId, bytesmemory _srcAddress, uint64 _nonce, bytesmemory _payload) publicvirtualoverride{
// lzReceive must be called by the endpoint for securityrequire(_msgSender() ==address(lzEndpoint));
bytesmemory trustedRemote = trustedRemoteLookup[_srcChainId];
// if will still block the message pathway from (srcChainId, srcAddress). should not receive message from untrusted remote.require(_srcAddress.length== trustedRemote.length&&keccak256(_srcAddress) ==keccak256(trustedRemote), "LzReceiver: invalid source sending contract");
_blockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);
}
// abstract function - the default behaviour of LayerZero is blocking. See: NonblockingLzApp if you dont need to enforce ordered messagingfunction_blockingLzReceive(uint16 _srcChainId, bytesmemory _srcAddress, uint64 _nonce, bytesmemory _payload) internalvirtual;
function_lzSend(uint16 _dstChainId, bytesmemory _payload, addresspayable _refundAddress, address _zroPaymentAddress, bytesmemory _adapterParams) internalvirtual{
bytesmemory trustedRemote = trustedRemoteLookup[_dstChainId];
require(trustedRemote.length!=0, "LzSend: destination chain is not a trusted source.");
lzEndpoint.send{value: msg.value}(_dstChainId, trustedRemote, _payload, _refundAddress, _zroPaymentAddress, _adapterParams);
}
//---------------------------UserApplication config----------------------------------------functiongetConfig(uint16 _version, uint16 _chainId, address, uint _configType) externalviewreturns (bytesmemory) {
return lzEndpoint.getConfig(_version, _chainId, address(this), _configType);
}
// generic config for LayerZero user ApplicationfunctionsetConfig(uint16 _version, uint16 _chainId, uint _configType, bytescalldata _config) externaloverrideonlyOwner{
lzEndpoint.setConfig(_version, _chainId, _configType, _config);
}
functionsetSendVersion(uint16 _version) externaloverrideonlyOwner{
lzEndpoint.setSendVersion(_version);
}
functionsetReceiveVersion(uint16 _version) externaloverrideonlyOwner{
lzEndpoint.setReceiveVersion(_version);
}
functionforceResumeReceive(uint16 _srcChainId, bytescalldata _srcAddress) externaloverrideonlyOwner{
lzEndpoint.forceResumeReceive(_srcChainId, _srcAddress);
}
// allow owner to set it multiple times.functionsetTrustedRemote(uint16 _srcChainId, bytescalldata _srcAddress) externalonlyOwner{
trustedRemoteLookup[_srcChainId] = _srcAddress;
emit SetTrustedRemote(_srcChainId, _srcAddress);
}
//--------------------------- VIEW FUNCTION ----------------------------------------functionisTrustedRemote(uint16 _srcChainId, bytescalldata _srcAddress) externalviewreturns (bool) {
bytesmemory trustedSource = trustedRemoteLookup[_srcChainId];
returnkeccak256(trustedSource) ==keccak256(_srcAddress);
}
}
Contract Source Code
File 18 of 22: NonblockingLzApp.sol
// SPDX-License-Identifier: MITpragmasolidity ^0.8.0;import"./LzApp.sol";
/*
* the default LayerZero messaging behaviour is blocking, i.e. any failed message will block the channel
* this abstract class try-catch all fail messages and store locally for future retry. hence, non-blocking
* NOTE: if the srcAddress is not configured properly, it will still block the message pathway from (srcChainId, srcAddress)
*/abstractcontractNonblockingLzAppisLzApp{
constructor(address _endpoint) LzApp(_endpoint) {}
mapping(uint16=>mapping(bytes=>mapping(uint64=>bytes32))) public failedMessages;
eventMessageFailed(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes _payload);
// overriding the virtual function in LzReceiverfunction_blockingLzReceive(uint16 _srcChainId, bytesmemory _srcAddress, uint64 _nonce, bytesmemory _payload) internalvirtualoverride{
// try-catch all errors/exceptionstrythis.nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload) {
// do nothing
} catch {
// error / exception
failedMessages[_srcChainId][_srcAddress][_nonce] =keccak256(_payload);
emit MessageFailed(_srcChainId, _srcAddress, _nonce, _payload);
}
}
functionnonblockingLzReceive(uint16 _srcChainId, bytesmemory _srcAddress, uint64 _nonce, bytesmemory _payload) publicvirtual{
// only internal transactionrequire(_msgSender() ==address(this), "LzReceiver: caller must be LzApp");
_nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);
}
//@notice override this functionfunction_nonblockingLzReceive(uint16 _srcChainId, bytesmemory _srcAddress, uint64 _nonce, bytesmemory _payload) internalvirtual;
functionretryMessage(uint16 _srcChainId, bytesmemory _srcAddress, uint64 _nonce, bytescalldata _payload) publicpayablevirtual{
// assert there is message to retrybytes32 payloadHash = failedMessages[_srcChainId][_srcAddress][_nonce];
require(payloadHash !=bytes32(0), "LzReceiver: no stored message");
require(keccak256(_payload) == payloadHash, "LzReceiver: invalid payload");
// clear the stored message
failedMessages[_srcChainId][_srcAddress][_nonce] =bytes32(0);
// execute the message. revert if it fails again
_nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);
}
}
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (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 Throws if called by any account other than the owner.
*/modifieronlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/functionowner() publicviewvirtualreturns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/function_checkOwner() internalviewvirtual{
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 21 of 22: Strings.sol
// SPDX-License-Identifier: MIT// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)pragmasolidity ^0.8.0;/**
* @dev String operations.
*/libraryStrings{
bytes16privateconstant _HEX_SYMBOLS ="0123456789abcdef";
uint8privateconstant _ADDRESS_LENGTH =20;
/**
* @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);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/functiontoHexString(address addr) internalpurereturns (stringmemory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
}
Contract Source Code
File 22 of 22: UniversalONFT721.sol
// SPDX-License-Identifier: BUSL-1.1pragmasolidity ^0.8.7;import"./ONFT721.sol";
import {IDuelPepesWhitelist} from'./interfaces/IDuelPepesWhitelist.sol';
import {IDuelPepes} from'./interfaces/IDuelPepes.sol';
import"@openzeppelin/contracts/utils/Strings.sol";
/// @title Interface of the UniversalONFT standardcontractUniversalONFT721isONFT721{
addresspublic trustedMinter;
uintpublic nextMintId;
uintpublic publicMints;
uintpublic maxPublicMints;
/// @notice Constructor for the UniversalONFT/// @param _maxPublicMints the max number of public sale mints on this chain/// @param _trustedMinter whitelisted address/// @param _name the name of the token/// @param _symbol the token symbol/// @param _layerZeroEndpoint handles message transmission across chains/// @param _maxPublicMints the max number of public sale mints on this chainconstructor(address _trustedMinter,
stringmemory _name,
stringmemory _symbol,
address _layerZeroEndpoint,
uint _maxPublicMints
) ONFT721(_name, _symbol, _layerZeroEndpoint) {
maxPublicMints = _maxPublicMints;
trustedMinter = _trustedMinter;
}
/// @notice Mint your ONFTfunctionmint(uint256 number, address receiver) external{
require(msg.sender== trustedMinter, "Not authorized");
require(publicMints + number -1<= maxPublicMints, "ONFT: Max Mint limit reached");
uint256 newId;
for (uint i =0; i < number; ++i) {
newId = nextMintId;
nextMintId++;
_safeMint(receiver, newId);
}
}
/// @notice Mint admin NFTsfunctionadminMint() externalonlyOwner{
uint newId = nextMintId;
nextMintId++;
_safeMint(msg.sender, newId);
}
/// @notice Set trusted minterfunctionadminSetTrustedMinter(address minter) externalonlyOwner{
trustedMinter = minter;
}
/// @notice Set base urifunctionadminSetURI(stringmemory URI) externalonlyOwner{
baseURI = URI;
}
/// @notice Get token urifunctiontokenURI(uint256 tokenId) publicviewoverridereturns (stringmemory) {
returnbytes(baseURI).length>0 ? string(abi.encodePacked(baseURI, Strings.toString(tokenId), ".json")) : "";
}
}
