Feature Tip: Add private address tag to any address under My Name Tag !
ERC-1155
Overview
Max Total Supply
1,756 BELLO
Holders
1,754
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Minimal Proxy Contract for 0x33524da1fb4bebaf2c9046407a6944d6e16b460f
Contract Name:
TokenERC1155
Compiler Version
v0.8.12+commit.f00d7308
Optimization Enabled:
Yes with 800 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; // Interface import { ITokenERC1155 } from "../interfaces/token/ITokenERC1155.sol"; // Token import "@openzeppelin/contracts-upgradeable/token/ERC1155/ERC1155Upgradeable.sol"; // Signature utils import "@openzeppelin/contracts-upgradeable/utils/cryptography/ECDSAUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/utils/cryptography/draft-EIP712Upgradeable.sol"; // Access Control + security import "@openzeppelin/contracts-upgradeable/access/AccessControlEnumerableUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol"; // Utils import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/utils/MulticallUpgradeable.sol"; import "../lib/CurrencyTransferLib.sol"; import "../lib/FeeType.sol"; import "../openzeppelin-presets/metatx/ERC2771ContextUpgradeable.sol"; // Helper interfaces import "@openzeppelin/contracts-upgradeable/interfaces/IERC2981Upgradeable.sol"; // Thirdweb top-level import "../interfaces/ITWFee.sol"; contract TokenERC1155 is Initializable, EIP712Upgradeable, ReentrancyGuardUpgradeable, ERC2771ContextUpgradeable, MulticallUpgradeable, AccessControlEnumerableUpgradeable, ERC1155Upgradeable, ITokenERC1155 { using ECDSAUpgradeable for bytes32; using StringsUpgradeable for uint256; bytes32 private constant MODULE_TYPE = bytes32("TokenERC1155"); uint256 private constant VERSION = 1; // Token name string public name; // Token symbol string public symbol; bytes32 private constant TYPEHASH = keccak256( "MintRequest(address to,address royaltyRecipient,uint256 royaltyBps,address primarySaleRecipient,uint256 tokenId,string uri,uint256 quantity,uint256 pricePerToken,address currency,uint128 validityStartTimestamp,uint128 validityEndTimestamp,bytes32 uid)" ); /// @dev Only TRANSFER_ROLE holders can have tokens transferred from or to them, during restricted transfers. bytes32 private constant TRANSFER_ROLE = keccak256("TRANSFER_ROLE"); /// @dev Only MINTER_ROLE holders can sign off on `MintRequest`s. bytes32 private constant MINTER_ROLE = keccak256("MINTER_ROLE"); /// @dev Max bps in the thirdweb system uint256 private constant MAX_BPS = 10_000; /// @dev The address interpreted as native token of the chain. address private constant NATIVE_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @dev The thirdweb contract with fee related information. ITWFee public immutable thirdwebFee; /// @dev Owner of the contract (purpose: OpenSea compatibility, etc.) address private _owner; /// @dev The next token ID of the NFT to mint. uint256 public nextTokenIdToMint; /// @dev The adress that receives all primary sales value. address public primarySaleRecipient; /// @dev The adress that receives all primary sales value. address public platformFeeRecipient; /// @dev The recipient of who gets the royalty. address private royaltyRecipient; /// @dev The percentage of royalty how much royalty in basis points. uint128 private royaltyBps; /// @dev The % of primary sales collected by the contract as fees. uint128 public platformFeeBps; /// @dev Contract level metadata. string public contractURI; /// @dev Mapping from mint request UID => whether the mint request is processed. mapping(bytes32 => bool) private minted; mapping(uint256 => string) private _tokenURI; /// @dev Token ID => total circulating supply of tokens with that ID. mapping(uint256 => uint256) public totalSupply; /// @dev Token ID => the address of the recipient of primary sales. mapping(uint256 => address) public saleRecipientForToken; /// @dev Token ID => royalty recipient and bps for token mapping(uint256 => RoyaltyInfo) private royaltyInfoForToken; constructor(address _thirdwebFee) initializer { thirdwebFee = ITWFee(_thirdwebFee); } /// @dev Initiliazes the contract, like a constructor. function initialize( address _defaultAdmin, string memory _name, string memory _symbol, string memory _contractURI, address[] memory _trustedForwarders, address _primarySaleRecipient, address _royaltyRecipient, uint128 _royaltyBps, uint128 _platformFeeBps, address _platformFeeRecipient ) external initializer { // Initialize inherited contracts, most base-like -> most derived. __ReentrancyGuard_init(); __EIP712_init("TokenERC1155", "1"); __ERC2771Context_init(_trustedForwarders); __ERC1155_init(""); // Initialize this contract's state. name = _name; symbol = _symbol; royaltyRecipient = _royaltyRecipient; royaltyBps = _royaltyBps; platformFeeRecipient = _platformFeeRecipient; primarySaleRecipient = _primarySaleRecipient; contractURI = _contractURI; platformFeeBps = _platformFeeBps; _owner = _defaultAdmin; _setupRole(DEFAULT_ADMIN_ROLE, _defaultAdmin); _setupRole(MINTER_ROLE, _defaultAdmin); _setupRole(TRANSFER_ROLE, _defaultAdmin); _setupRole(TRANSFER_ROLE, address(0)); } /// ===== Public functions ===== /// @dev Returns the module type of the contract. function contractType() external pure returns (bytes32) { return MODULE_TYPE; } /// @dev Returns the version of the contract. function contractVersion() external pure returns (uint8) { return uint8(VERSION); } /** * @dev Returns the address of the current owner. */ function owner() public view returns (address) { return hasRole(DEFAULT_ADMIN_ROLE, _owner) ? _owner : address(0); } /// @dev Verifies that a mint request is signed by an account holding MINTER_ROLE (at the time of the function call). function verify(MintRequest calldata _req, bytes calldata _signature) public view returns (bool, address) { address signer = recoverAddress(_req, _signature); return (!minted[_req.uid] && hasRole(MINTER_ROLE, signer), signer); } /// @dev Returns the URI for a tokenId function uri(uint256 _tokenId) public view override returns (string memory) { return _tokenURI[_tokenId]; } /// @dev Lets an account with MINTER_ROLE mint an NFT. function mintTo( address _to, uint256 _tokenId, string calldata _uri, uint256 _amount ) external onlyRole(MINTER_ROLE) { uint256 tokenIdToMint; if (_tokenId == type(uint256).max) { tokenIdToMint = nextTokenIdToMint; nextTokenIdToMint += 1; } else { require(_tokenId < nextTokenIdToMint, "invalid id"); tokenIdToMint = _tokenId; } // `_mintTo` is re-used. `mintTo` just adds a minter role check. _mintTo(_to, _uri, tokenIdToMint, _amount); } /// ===== External functions ===== /// @dev See EIP-2981 function royaltyInfo(uint256 tokenId, uint256 salePrice) external view virtual returns (address receiver, uint256 royaltyAmount) { (address recipient, uint256 bps) = getRoyaltyInfoForToken(tokenId); receiver = recipient; royaltyAmount = (salePrice * bps) / MAX_BPS; } /// @dev Mints an NFT according to the provided mint request. function mintWithSignature(MintRequest calldata _req, bytes calldata _signature) external payable nonReentrant { address signer = verifyRequest(_req, _signature); address receiver = _req.to == address(0) ? _msgSender() : _req.to; uint256 tokenIdToMint; if (_req.tokenId == type(uint256).max) { tokenIdToMint = nextTokenIdToMint; nextTokenIdToMint += 1; } else { require(_req.tokenId < nextTokenIdToMint, "invalid id"); tokenIdToMint = _req.tokenId; } if (_req.royaltyRecipient != address(0)) { royaltyInfoForToken[tokenIdToMint] = RoyaltyInfo({ recipient: _req.royaltyRecipient, bps: _req.royaltyBps }); } _mintTo(receiver, _req.uri, tokenIdToMint, _req.quantity); collectPrice(_req); emit TokensMintedWithSignature(signer, receiver, tokenIdToMint, _req); } // ===== Setter functions ===== /// @dev Lets a module admin set the default recipient of all primary sales. function setPrimarySaleRecipient(address _saleRecipient) external onlyRole(DEFAULT_ADMIN_ROLE) { primarySaleRecipient = _saleRecipient; emit PrimarySaleRecipientUpdated(_saleRecipient); } /// @dev Lets a module admin update the royalty bps and recipient. function setDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) external onlyRole(DEFAULT_ADMIN_ROLE) { require(_royaltyBps <= MAX_BPS, "exceed royalty bps"); royaltyRecipient = _royaltyRecipient; royaltyBps = uint128(_royaltyBps); emit DefaultRoyalty(_royaltyRecipient, _royaltyBps); } /// @dev Lets a module admin set the royalty recipient for a particular token Id. function setRoyaltyInfoForToken( uint256 _tokenId, address _recipient, uint256 _bps ) external onlyRole(DEFAULT_ADMIN_ROLE) { require(_bps <= MAX_BPS, "exceed royalty bps"); royaltyInfoForToken[_tokenId] = RoyaltyInfo({ recipient: _recipient, bps: _bps }); emit RoyaltyForToken(_tokenId, _recipient, _bps); } /// @dev Lets a module admin update the fees on primary sales. function setPlatformFeeInfo(address _platformFeeRecipient, uint256 _platformFeeBps) external onlyRole(DEFAULT_ADMIN_ROLE) { require(_platformFeeBps <= MAX_BPS, "bps <= 10000."); platformFeeBps = uint64(_platformFeeBps); platformFeeRecipient = _platformFeeRecipient; emit PlatformFeeInfoUpdated(_platformFeeRecipient, _platformFeeBps); } /// @dev Lets a module admin set a new owner for the contract. The new owner must be a module admin. function setOwner(address _newOwner) external onlyRole(DEFAULT_ADMIN_ROLE) { require(hasRole(DEFAULT_ADMIN_ROLE, _newOwner), "new owner not module admin."); address _prevOwner = _owner; _owner = _newOwner; emit OwnerUpdated(_prevOwner, _newOwner); } /// @dev Lets a module admin set the URI for contract-level metadata. function setContractURI(string calldata _uri) external onlyRole(DEFAULT_ADMIN_ROLE) { contractURI = _uri; } /// ===== Getter functions ===== /// @dev Returns the platform fee bps and recipient. function getPlatformFeeInfo() external view returns (address, uint16) { return (platformFeeRecipient, uint16(platformFeeBps)); } /// @dev Returns the platform fee bps and recipient. function getDefaultRoyaltyInfo() external view returns (address, uint16) { return (royaltyRecipient, uint16(royaltyBps)); } /// @dev Returns the royalty recipient for a particular token Id. function getRoyaltyInfoForToken(uint256 _tokenId) public view returns (address, uint16) { RoyaltyInfo memory royaltyForToken = royaltyInfoForToken[_tokenId]; return royaltyForToken.recipient == address(0) ? (royaltyRecipient, uint16(royaltyBps)) : (royaltyForToken.recipient, uint16(royaltyForToken.bps)); } /// ===== Internal functions ===== /// @dev Mints an NFT to `to` function _mintTo( address _to, string calldata _uri, uint256 _tokenId, uint256 _amount ) internal { if (bytes(_tokenURI[_tokenId]).length == 0) { require(bytes(_uri).length > 0, "empty uri."); _tokenURI[_tokenId] = _uri; } _mint(_to, _tokenId, _amount, ""); emit TokensMinted(_to, _tokenId, _tokenURI[_tokenId], _amount); } /// @dev Returns the address of the signer of the mint request. function recoverAddress(MintRequest calldata _req, bytes calldata _signature) internal view returns (address) { return _hashTypedDataV4(keccak256(_encodeRequest(_req))).recover(_signature); } /// @dev Resolves 'stack too deep' error in `recoverAddress`. function _encodeRequest(MintRequest calldata _req) internal pure returns (bytes memory) { return abi.encode( TYPEHASH, _req.to, _req.royaltyRecipient, _req.royaltyBps, _req.primarySaleRecipient, _req.tokenId, keccak256(bytes(_req.uri)), _req.quantity, _req.pricePerToken, _req.currency, _req.validityStartTimestamp, _req.validityEndTimestamp, _req.uid ); } /// @dev Verifies that a mint request is valid. function verifyRequest(MintRequest calldata _req, bytes calldata _signature) internal returns (address) { (bool success, address signer) = verify(_req, _signature); require(success, "invalid signature"); require( _req.validityStartTimestamp <= block.timestamp && _req.validityEndTimestamp >= block.timestamp, "request expired" ); minted[_req.uid] = true; return signer; } /// @dev Collects and distributes the primary sale value of tokens being claimed. function collectPrice(MintRequest memory _req) internal { if (_req.pricePerToken == 0) { return; } uint256 totalPrice = _req.pricePerToken * _req.quantity; uint256 platformFees = (totalPrice * platformFeeBps) / MAX_BPS; (address twFeeRecipient, uint256 twFeeBps) = thirdwebFee.getFeeInfo(address(this), FeeType.PRIMARY_SALE); uint256 twFee = (totalPrice * twFeeBps) / MAX_BPS; if (_req.currency == NATIVE_TOKEN) { require(msg.value == totalPrice, "must send total price."); } address saleRecipient = _req.primarySaleRecipient == address(0) ? primarySaleRecipient : _req.primarySaleRecipient; CurrencyTransferLib.transferCurrency(_req.currency, _msgSender(), platformFeeRecipient, platformFees); CurrencyTransferLib.transferCurrency(_req.currency, _msgSender(), twFeeRecipient, twFee); CurrencyTransferLib.transferCurrency( _req.currency, _msgSender(), saleRecipient, totalPrice - platformFees - twFee ); } /// ===== Low-level overrides ===== /// @dev Lets a token owner burn the tokens they own (i.e. destroy for good) function burn( address account, uint256 id, uint256 value ) public virtual { require( account == _msgSender() || isApprovedForAll(account, _msgSender()), "ERC1155: caller is not owner nor approved." ); _burn(account, id, value); } /// @dev Lets a token owner burn multiple tokens they own at once (i.e. destroy for good) function burnBatch( address account, uint256[] memory ids, uint256[] memory values ) public virtual { require( account == _msgSender() || isApprovedForAll(account, _msgSender()), "ERC1155: caller is not owner nor approved." ); _burnBatch(account, ids, values); } /** * @dev See {ERC1155-_beforeTokenTransfer}. */ function _beforeTokenTransfer( address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) internal virtual override { super._beforeTokenTransfer(operator, from, to, ids, amounts, data); // if transfer is restricted on the contract, we still want to allow burning and minting if (!hasRole(TRANSFER_ROLE, address(0)) && from != address(0) && to != address(0)) { require(hasRole(TRANSFER_ROLE, from) || hasRole(TRANSFER_ROLE, to), "restricted to TRANSFER_ROLE holders."); } if (from == address(0)) { for (uint256 i = 0; i < ids.length; ++i) { totalSupply[ids[i]] += amounts[i]; } } if (to == address(0)) { for (uint256 i = 0; i < ids.length; ++i) { totalSupply[ids[i]] -= amounts[i]; } } } function supportsInterface(bytes4 interfaceId) public view virtual override(AccessControlEnumerableUpgradeable, ERC1155Upgradeable, IERC165Upgradeable) returns (bool) { return super.supportsInterface(interfaceId) || interfaceId == type(IERC1155Upgradeable).interfaceId || interfaceId == type(IERC2981Upgradeable).interfaceId; } function _msgSender() internal view virtual override(ContextUpgradeable, ERC2771ContextUpgradeable) returns (address sender) { return ERC2771ContextUpgradeable._msgSender(); } function _msgData() internal view virtual override(ContextUpgradeable, ERC2771ContextUpgradeable) returns (bytes calldata) { return ERC2771ContextUpgradeable._msgData(); } }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; import "@openzeppelin/contracts-upgradeable/token/ERC1155/IERC1155Upgradeable.sol"; import "../IThirdwebContract.sol"; import "../IThirdwebPlatformFee.sol"; import "../IThirdwebPrimarySale.sol"; import "../IThirdwebRoyalty.sol"; import "../IThirdwebOwnable.sol"; /** * `SignatureMint1155` is an ERC 1155 contract. It lets anyone mint NFTs by producing a mint request * and a signature (produced by an account with MINTER_ROLE, signing the mint request). */ interface ITokenERC1155 is IThirdwebContract, IThirdwebOwnable, IThirdwebRoyalty, IThirdwebPrimarySale, IThirdwebPlatformFee, IERC1155Upgradeable { /** * @notice The body of a request to mint NFTs. * * @param to The receiver of the NFTs to mint. * @param royaltyRecipient The recipient of the minted NFT's secondary sales royalties. * @param primarySaleRecipient The recipient of the minted NFT's primary sales proceeds. * @param tokenId Optional: specify only if not first mint. * @param uri The URI of the NFT to mint. * @param quantity The quantity of NFTs to mint. * @param pricePerToken Price to pay for minting with the signature. * @param currency The currency in which the price per token must be paid. * @param validityStartTimestamp The unix timestamp after which the request is valid. * @param validityEndTimestamp The unix timestamp after which the request expires. * @param uid A unique identifier for the request. */ struct MintRequest { address to; address royaltyRecipient; uint256 royaltyBps; address primarySaleRecipient; uint256 tokenId; string uri; uint256 quantity; uint256 pricePerToken; address currency; uint128 validityStartTimestamp; uint128 validityEndTimestamp; bytes32 uid; } /// @dev Emitted when an account with MINTER_ROLE mints an NFT. event TokensMinted(address indexed mintedTo, uint256 indexed tokenIdMinted, string uri, uint256 quantityMinted); /// @dev Emitted when tokens are minted. event TokensMintedWithSignature( address indexed signer, address indexed mintedTo, uint256 indexed tokenIdMinted, MintRequest mintRequest ); /// @dev Emitted when a new sale recipient is set. event PrimarySaleRecipientUpdated(address indexed recipient); /// @dev Emitted when fee on primary sales is updated. event PlatformFeeInfoUpdated(address platformFeeRecipient, uint256 platformFeeBps); /// @dev Emitted when a new Owner is set. event OwnerUpdated(address prevOwner, address newOwner); /** * @notice Verifies that a mint request is signed by an account holding * MINTER_ROLE (at the time of the function call). * * @param req The mint request. * @param signature The signature produced by an account signing the mint request. * * returns (success, signer) Result of verification and the recovered address. */ function verify(MintRequest calldata req, bytes calldata signature) external view returns (bool success, address signer); /** * @notice Lets an account with MINTER_ROLE mint an NFT. * * @param to The address to mint the NFT to. * @param tokenId The tokenId of the NFTs to mint * @param uri The URI to assign to the NFT. * @param amount The number of copies of the NFT to mint. * */ function mintTo( address to, uint256 tokenId, string calldata uri, uint256 amount ) external; /** * @notice Mints an NFT according to the provided mint request. * * @param req The mint request. * @param signature he signature produced by an account signing the mint request. */ function mintWithSignature(MintRequest calldata req, bytes calldata signature) external payable; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC1155/ERC1155.sol) pragma solidity ^0.8.0; import "./IERC1155Upgradeable.sol"; import "./IERC1155ReceiverUpgradeable.sol"; import "./extensions/IERC1155MetadataURIUpgradeable.sol"; import "../../utils/AddressUpgradeable.sol"; import "../../utils/ContextUpgradeable.sol"; import "../../utils/introspection/ERC165Upgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the basic standard multi-token. * See https://eips.ethereum.org/EIPS/eip-1155 * Originally based on code by Enjin: https://github.com/enjin/erc-1155 * * _Available since v3.1._ */ contract ERC1155Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC1155Upgradeable, IERC1155MetadataURIUpgradeable { using AddressUpgradeable for address; // Mapping from token ID to account balances mapping(uint256 => mapping(address => uint256)) private _balances; // Mapping from account to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json string private _uri; /** * @dev See {_setURI}. */ function __ERC1155_init(string memory uri_) internal onlyInitializing { __ERC1155_init_unchained(uri_); } function __ERC1155_init_unchained(string memory uri_) internal onlyInitializing { _setURI(uri_); } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) { return interfaceId == type(IERC1155Upgradeable).interfaceId || interfaceId == type(IERC1155MetadataURIUpgradeable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC1155MetadataURI-uri}. * * This implementation returns the same URI for *all* token types. It relies * on the token type ID substitution mechanism * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP]. * * Clients calling this function must replace the `\{id\}` substring with the * actual token type ID. */ function uri(uint256) public view virtual override returns (string memory) { return _uri; } /** * @dev See {IERC1155-balanceOf}. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) public view virtual override returns (uint256) { require(account != address(0), "ERC1155: balance query for the zero address"); return _balances[id][account]; } /** * @dev See {IERC1155-balanceOfBatch}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch(address[] memory accounts, uint256[] memory ids) public view virtual override returns (uint256[] memory) { require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch"); uint256[] memory batchBalances = new uint256[](accounts.length); for (uint256 i = 0; i < accounts.length; ++i) { batchBalances[i] = balanceOf(accounts[i], ids[i]); } return batchBalances; } /** * @dev See {IERC1155-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC1155-isApprovedForAll}. */ function isApprovedForAll(address account, address operator) public view virtual override returns (bool) { return _operatorApprovals[account][operator]; } /** * @dev See {IERC1155-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes memory data ) public virtual override { require( from == _msgSender() || isApprovedForAll(from, _msgSender()), "ERC1155: caller is not owner nor approved" ); _safeTransferFrom(from, to, id, amount, data); } /** * @dev See {IERC1155-safeBatchTransferFrom}. */ function safeBatchTransferFrom( address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) public virtual override { require( from == _msgSender() || isApprovedForAll(from, _msgSender()), "ERC1155: transfer caller is not owner nor approved" ); _safeBatchTransferFrom(from, to, ids, amounts, data); } /** * @dev Transfers `amount` tokens of token type `id` from `from` to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - `from` must have a balance of tokens of type `id` of at least `amount`. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function _safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes memory data ) internal virtual { require(to != address(0), "ERC1155: transfer to the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data); uint256 fromBalance = _balances[id][from]; require(fromBalance >= amount, "ERC1155: insufficient balance for transfer"); unchecked { _balances[id][from] = fromBalance - amount; } _balances[id][to] += amount; emit TransferSingle(operator, from, to, id, amount); _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data); } /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}. * * Emits a {TransferBatch} event. * * Requirements: * * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function _safeBatchTransferFrom( address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) internal virtual { require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch"); require(to != address(0), "ERC1155: transfer to the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, from, to, ids, amounts, data); for (uint256 i = 0; i < ids.length; ++i) { uint256 id = ids[i]; uint256 amount = amounts[i]; uint256 fromBalance = _balances[id][from]; require(fromBalance >= amount, "ERC1155: insufficient balance for transfer"); unchecked { _balances[id][from] = fromBalance - amount; } _balances[id][to] += amount; } emit TransferBatch(operator, from, to, ids, amounts); _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data); } /** * @dev Sets a new URI for all token types, by relying on the token type ID * substitution mechanism * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP]. * * By this mechanism, any occurrence of the `\{id\}` substring in either the * URI or any of the amounts in the JSON file at said URI will be replaced by * clients with the token type ID. * * For example, the `https://token-cdn-domain/\{id\}.json` URI would be * interpreted by clients as * `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json` * for token type ID 0x4cce0. * * See {uri}. * * Because these URIs cannot be meaningfully represented by the {URI} event, * this function emits no events. */ function _setURI(string memory newuri) internal virtual { _uri = newuri; } /** * @dev Creates `amount` tokens of token type `id`, and assigns them to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function _mint( address to, uint256 id, uint256 amount, bytes memory data ) internal virtual { require(to != address(0), "ERC1155: mint to the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data); _balances[id][to] += amount; emit TransferSingle(operator, address(0), to, id, amount); _doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data); } /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function _mintBatch( address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) internal virtual { require(to != address(0), "ERC1155: mint to the zero address"); require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch"); address operator = _msgSender(); _beforeTokenTransfer(operator, address(0), to, ids, amounts, data); for (uint256 i = 0; i < ids.length; i++) { _balances[ids[i]][to] += amounts[i]; } emit TransferBatch(operator, address(0), to, ids, amounts); _doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data); } /** * @dev Destroys `amount` tokens of token type `id` from `from` * * Requirements: * * - `from` cannot be the zero address. * - `from` must have at least `amount` tokens of token type `id`. */ function _burn( address from, uint256 id, uint256 amount ) internal virtual { require(from != address(0), "ERC1155: burn from the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), ""); uint256 fromBalance = _balances[id][from]; require(fromBalance >= amount, "ERC1155: burn amount exceeds balance"); unchecked { _balances[id][from] = fromBalance - amount; } emit TransferSingle(operator, from, address(0), id, amount); } /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}. * * Requirements: * * - `ids` and `amounts` must have the same length. */ function _burnBatch( address from, uint256[] memory ids, uint256[] memory amounts ) internal virtual { require(from != address(0), "ERC1155: burn from the zero address"); require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch"); address operator = _msgSender(); _beforeTokenTransfer(operator, from, address(0), ids, amounts, ""); for (uint256 i = 0; i < ids.length; i++) { uint256 id = ids[i]; uint256 amount = amounts[i]; uint256 fromBalance = _balances[id][from]; require(fromBalance >= amount, "ERC1155: burn amount exceeds balance"); unchecked { _balances[id][from] = fromBalance - amount; } } emit TransferBatch(operator, from, address(0), ids, amounts); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits a {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC1155: setting approval status for self"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Hook that is called before any token transfer. This includes minting * and burning, as well as batched variants. * * The same hook is called on both single and batched variants. For single * transfers, the length of the `id` and `amount` arrays will be 1. * * Calling conditions (for each `id` and `amount` pair): * * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens * of token type `id` will be transferred to `to`. * - When `from` is zero, `amount` tokens of token type `id` will be minted * for `to`. * - when `to` is zero, `amount` of ``from``'s tokens of token type `id` * will be burned. * - `from` and `to` are never both zero. * - `ids` and `amounts` have the same, non-zero length. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) internal virtual {} function _doSafeTransferAcceptanceCheck( address operator, address from, address to, uint256 id, uint256 amount, bytes memory data ) private { if (to.isContract()) { try IERC1155ReceiverUpgradeable(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) { if (response != IERC1155ReceiverUpgradeable.onERC1155Received.selector) { revert("ERC1155: ERC1155Receiver rejected tokens"); } } catch Error(string memory reason) { revert(reason); } catch { revert("ERC1155: transfer to non ERC1155Receiver implementer"); } } } function _doSafeBatchTransferAcceptanceCheck( address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) private { if (to.isContract()) { try IERC1155ReceiverUpgradeable(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns ( bytes4 response ) { if (response != IERC1155ReceiverUpgradeable.onERC1155BatchReceived.selector) { revert("ERC1155: ERC1155Receiver rejected tokens"); } } catch Error(string memory reason) { revert(reason); } catch { revert("ERC1155: transfer to non ERC1155Receiver implementer"); } } } function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) { uint256[] memory array = new uint256[](1); array[0] = element; return array; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[47] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../StringsUpgradeable.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSAUpgradeable { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } else if (error == RecoverError.InvalidSignatureV) { revert("ECDSA: invalid signature 'v' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { // Check the signature length // - case 65: r,s,v signature (standard) // - case 64: r,vs signature (cf https://eips.ethereum.org/EIPS/eip-2098) _Available since v4.1._ if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else if (signature.length == 64) { bytes32 r; bytes32 vs; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } return tryRecover(hash, r, vs); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } if (v != 27 && v != 28) { return (address(0), RecoverError.InvalidSignatureV); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", StringsUpgradeable.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/cryptography/draft-EIP712.sol) pragma solidity ^0.8.0; import "./ECDSAUpgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * _Available since v3.4._ */ abstract contract EIP712Upgradeable is Initializable { /* solhint-disable var-name-mixedcase */ bytes32 private _HASHED_NAME; bytes32 private _HASHED_VERSION; bytes32 private constant _TYPE_HASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"); /* solhint-enable var-name-mixedcase */ /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ function __EIP712_init(string memory name, string memory version) internal onlyInitializing { __EIP712_init_unchained(name, version); } function __EIP712_init_unchained(string memory name, string memory version) internal onlyInitializing { bytes32 hashedName = keccak256(bytes(name)); bytes32 hashedVersion = keccak256(bytes(version)); _HASHED_NAME = hashedName; _HASHED_VERSION = hashedVersion; } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { return _buildDomainSeparator(_TYPE_HASH, _EIP712NameHash(), _EIP712VersionHash()); } function _buildDomainSeparator( bytes32 typeHash, bytes32 nameHash, bytes32 versionHash ) private view returns (bytes32) { return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSAUpgradeable.toTypedDataHash(_domainSeparatorV4(), structHash); } /** * @dev The hash of the name parameter for the EIP712 domain. * * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs * are a concern. */ function _EIP712NameHash() internal virtual view returns (bytes32) { return _HASHED_NAME; } /** * @dev The hash of the version parameter for the EIP712 domain. * * NOTE: This function reads from storage by default, but can be redefined to return a constant value if gas costs * are a concern. */ function _EIP712VersionHash() internal virtual view returns (bytes32) { return _HASHED_VERSION; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControlEnumerable.sol) pragma solidity ^0.8.0; import "./IAccessControlEnumerableUpgradeable.sol"; import "./AccessControlUpgradeable.sol"; import "../utils/structs/EnumerableSetUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Extension of {AccessControl} that allows enumerating the members of each role. */ abstract contract AccessControlEnumerableUpgradeable is Initializable, IAccessControlEnumerableUpgradeable, AccessControlUpgradeable { function __AccessControlEnumerable_init() internal onlyInitializing { } function __AccessControlEnumerable_init_unchained() internal onlyInitializing { } using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet; mapping(bytes32 => EnumerableSetUpgradeable.AddressSet) private _roleMembers; /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControlEnumerableUpgradeable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) public view virtual override returns (address) { return _roleMembers[role].at(index); } /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) public view virtual override returns (uint256) { return _roleMembers[role].length(); } /** * @dev Overload {_grantRole} to track enumerable memberships */ function _grantRole(bytes32 role, address account) internal virtual override { super._grantRole(role, account); _roleMembers[role].add(account); } /** * @dev Overload {_revokeRole} to track enumerable memberships */ function _revokeRole(bytes32 role, address account) internal virtual override { super._revokeRole(role, account); _roleMembers[role].remove(account); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuardUpgradeable is Initializable { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; function __ReentrancyGuard_init() internal onlyInitializing { __ReentrancyGuard_init_unchained(); } function __ReentrancyGuard_init_unchained() internal onlyInitializing { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library StringsUpgradeable { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Multicall.sol) pragma solidity ^0.8.0; import "./AddressUpgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Provides a function to batch together multiple calls in a single external call. * * _Available since v4.1._ */ abstract contract MulticallUpgradeable is Initializable { function __Multicall_init() internal onlyInitializing { } function __Multicall_init_unchained() internal onlyInitializing { } /** * @dev Receives and executes a batch of function calls on this contract. */ function multicall(bytes[] calldata data) external virtual returns (bytes[] memory results) { results = new bytes[](data.length); for (uint256 i = 0; i < data.length; i++) { results[i] = _functionDelegateCall(address(this), data[i]); } return results; } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) { require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed"); } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; // Helper interfaces import { IWETH } from "../interfaces/IWETH.sol"; import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol"; library CurrencyTransferLib { /// @dev The address interpreted as native token of the chain. address public constant NATIVE_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; /// @dev Transfers a given amount of currency. function transferCurrency( address _currency, address _from, address _to, uint256 _amount ) internal { if (_amount == 0) { return; } if (_currency == NATIVE_TOKEN) { safeTransferNativeToken(_to, _amount); } else { safeTransferERC20(_currency, _from, _to, _amount); } } /// @dev Transfers a given amount of currency. (With native token wrapping) function transferCurrencyWithWrapperAndBalanceCheck( address _currency, address _from, address _to, uint256 _amount, address _nativeTokenWrapper ) internal { if (_amount == 0) { return; } if (_currency == NATIVE_TOKEN) { if (_from == address(this)) { // withdraw from weth then transfer withdrawn native token to recipient IWETH(_nativeTokenWrapper).withdraw(_amount); safeTransferNativeTokenWithWrapper(_to, _amount, _nativeTokenWrapper); } else if (_to == address(this)) { // store native currency in weth require(_amount == msg.value, "msg.value != amount"); IWETH(_nativeTokenWrapper).deposit{ value: _amount }(); } else { safeTransferNativeTokenWithWrapper(_to, _amount, _nativeTokenWrapper); } } else { safeTransferERC20WithBalanceCheck(_currency, _from, _to, _amount); } } /// @dev Transfer `amount` of ERC20 token from `from` to `to`. function safeTransferERC20( address _currency, address _from, address _to, uint256 _amount ) internal { if (_from == _to) { return; } bool success = _from == address(this) ? IERC20Upgradeable(_currency).transfer(_to, _amount) : IERC20Upgradeable(_currency).transferFrom(_from, _to, _amount); require(success, "currency transfer failed."); } /// @dev Transfer `amount` of ERC20 token from `from` to `to`. function safeTransferERC20WithBalanceCheck( address _currency, address _from, address _to, uint256 _amount ) internal { if (_from == _to) { return; } uint256 balBefore = IERC20Upgradeable(_currency).balanceOf(_to); bool success = _from == address(this) ? IERC20Upgradeable(_currency).transfer(_to, _amount) : IERC20Upgradeable(_currency).transferFrom(_from, _to, _amount); uint256 balAfter = IERC20Upgradeable(_currency).balanceOf(_to); require(success && (balAfter == balBefore + _amount), "currency transfer failed."); } /// @dev Transfers `amount` of native token to `to`. function safeTransferNativeToken(address to, uint256 value) internal { // solhint-disable avoid-low-level-calls // slither-disable-next-line low-level-calls (bool success, ) = to.call{ value: value }(""); require(success, "native token transfer failed"); } /// @dev Transfers `amount` of native token to `to`. (With native token wrapping) function safeTransferNativeTokenWithWrapper( address to, uint256 value, address _nativeTokenWrapper ) internal { // solhint-disable avoid-low-level-calls // slither-disable-next-line low-level-calls (bool success, ) = to.call{ value: value }(""); if (!success) { IWETH(_nativeTokenWrapper).deposit{ value: value }(); require(IERC20Upgradeable(_nativeTokenWrapper).transfer(to, value), "transfer failed"); } } }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; library FeeType { uint256 internal constant PRIMARY_SALE = 0; uint256 internal constant MARKET_SALE = 1; uint256 internal constant SPLIT = 2; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.0 (metatx/ERC2771Context.sol) pragma solidity ^0.8.11; import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; /** * @dev Context variant with ERC2771 support. */ abstract contract ERC2771ContextUpgradeable is Initializable, ContextUpgradeable { mapping(address => bool) private _trustedForwarder; function __ERC2771Context_init(address[] memory trustedForwarder) internal onlyInitializing { __Context_init_unchained(); __ERC2771Context_init_unchained(trustedForwarder); } function __ERC2771Context_init_unchained(address[] memory trustedForwarder) internal onlyInitializing { for (uint256 i = 0; i < trustedForwarder.length; i++) { _trustedForwarder[trustedForwarder[i]] = true; } } function isTrustedForwarder(address forwarder) public view virtual returns (bool) { return _trustedForwarder[forwarder]; } function _msgSender() internal view virtual override returns (address sender) { if (isTrustedForwarder(msg.sender)) { // The assembly code is more direct than the Solidity version using `abi.decode`. assembly { sender := shr(96, calldataload(sub(calldatasize(), 20))) } } else { return super._msgSender(); } } function _msgData() internal view virtual override returns (bytes calldata) { if (isTrustedForwarder(msg.sender)) { return msg.data[:msg.data.length - 20]; } else { return super._msgData(); } } uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (interfaces/IERC2981.sol) pragma solidity ^0.8.0; import "./IERC165Upgradeable.sol"; /** * @dev Interface for the NFT Royalty Standard. * * A standardized way to retrieve royalty payment information for non-fungible tokens (NFTs) to enable universal * support for royalty payments across all NFT marketplaces and ecosystem participants. * * _Available since v4.5._ */ interface IERC2981Upgradeable is IERC165Upgradeable { /** * @dev Returns how much royalty is owed and to whom, based on a sale price that may be denominated in any unit of * exchange. The royalty amount is denominated and should be payed in that same unit of exchange. */ function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount); }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; interface ITWFee { function getFeeInfo(address _proxy, uint256 _type) external view returns (address recipient, uint256 bps); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165Upgradeable.sol"; /** * @dev Required interface of an ERC1155 compliant contract, as defined in the * https://eips.ethereum.org/EIPS/eip-1155[EIP]. * * _Available since v3.1._ */ interface IERC1155Upgradeable is IERC165Upgradeable { /** * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`. */ event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value); /** * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all * transfers. */ event TransferBatch( address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values ); /** * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to * `approved`. */ event ApprovalForAll(address indexed account, address indexed operator, bool approved); /** * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI. * * If an {URI} event was emitted for `id`, the standard * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value * returned by {IERC1155MetadataURI-uri}. */ event URI(string value, uint256 indexed id); /** * @dev Returns the amount of tokens of token type `id` owned by `account`. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) external view returns (uint256); /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory); /** * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`, * * Emits an {ApprovalForAll} event. * * Requirements: * * - `operator` cannot be the caller. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns true if `operator` is approved to transfer ``account``'s tokens. * * See {setApprovalForAll}. */ function isApprovedForAll(address account, address operator) external view returns (bool); /** * @dev Transfers `amount` tokens of token type `id` from `from` to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}. * - `from` must have a balance of tokens of type `id` of at least `amount`. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes calldata data ) external; /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}. * * Emits a {TransferBatch} event. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function safeBatchTransferFrom( address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data ) external; }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; interface IThirdwebContract { /// @dev Returns the module type of the contract. function contractType() external pure returns (bytes32); /// @dev Returns the version of the contract. function contractVersion() external pure returns (uint8); /// @dev Returns the metadata URI of the contract. function contractURI() external view returns (string memory); /** * @dev Sets contract URI for the storefront-level metadata of the contract. * Only module admin can call this function. */ function setContractURI(string calldata _uri) external; }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; interface IThirdwebPlatformFee { /// @dev Returns the platform fee bps and recipient. function getPlatformFeeInfo() external view returns (address platformFeeRecipient, uint16 platformFeeBps); /// @dev Lets a module admin update the fees on primary sales. function setPlatformFeeInfo(address _platformFeeRecipient, uint256 _platformFeeBps) external; }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; interface IThirdwebPrimarySale { /// @dev The adress that receives all primary sales value. function primarySaleRecipient() external view returns (address); /// @dev Lets a module admin set the default recipient of all primary sales. function setPrimarySaleRecipient(address _saleRecipient) external; }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; import "@openzeppelin/contracts-upgradeable/interfaces/IERC2981Upgradeable.sol"; interface IThirdwebRoyalty is IERC2981Upgradeable { struct RoyaltyInfo { address recipient; uint256 bps; } /// @dev Returns the royalty recipient and fee bps. function getDefaultRoyaltyInfo() external view returns (address, uint16); /// @dev Lets a module admin update the royalty bps and recipient. function setDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) external; /// @dev Lets a module admin set the royalty recipient for a particular token Id. function setRoyaltyInfoForToken( uint256 tokenId, address recipient, uint256 bps ) external; /// @dev Returns the royalty recipient for a particular token Id. function getRoyaltyInfoForToken(uint256 tokenId) external view returns (address, uint16); /// @dev Emitted when royalty info is updated. event DefaultRoyalty(address newRoyaltyRecipient, uint256 newRoyaltyBps); /// @dev Emitted when royalty recipient for tokenId is set event RoyaltyForToken(uint256 indexed tokenId, address royaltyRecipient, uint256 royaltyBps); }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; interface IThirdwebOwnable { /// @dev Returns the owner of the contract. function owner() external view returns (address); /// @dev Lets a module admin set a new owner for the contract. The new owner must be a module admin. function setOwner(address _newOwner) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165Upgradeable { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol) pragma solidity ^0.8.0; import "../utils/introspection/IERC165Upgradeable.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165Upgradeable.sol"; /** * @dev _Available since v3.1._ */ interface IERC1155ReceiverUpgradeable is IERC165Upgradeable { /** * @dev Handles the receipt of a single ERC1155 token type. This function is * called at the end of a `safeTransferFrom` after the balance has been updated. * * NOTE: To accept the transfer, this must return * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` * (i.e. 0xf23a6e61, or its own function selector). * * @param operator The address which initiated the transfer (i.e. msg.sender) * @param from The address which previously owned the token * @param id The ID of the token being transferred * @param value The amount of tokens being transferred * @param data Additional data with no specified format * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed */ function onERC1155Received( address operator, address from, uint256 id, uint256 value, bytes calldata data ) external returns (bytes4); /** * @dev Handles the receipt of a multiple ERC1155 token types. This function * is called at the end of a `safeBatchTransferFrom` after the balances have * been updated. * * NOTE: To accept the transfer(s), this must return * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` * (i.e. 0xbc197c81, or its own function selector). * * @param operator The address which initiated the batch transfer (i.e. msg.sender) * @param from The address which previously owned the token * @param ids An array containing ids of each token being transferred (order and length must match values array) * @param values An array containing amounts of each token being transferred (order and length must match ids array) * @param data Additional data with no specified format * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed */ function onERC1155BatchReceived( address operator, address from, uint256[] calldata ids, uint256[] calldata values, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol) pragma solidity ^0.8.0; import "../IERC1155Upgradeable.sol"; /** * @dev Interface of the optional ERC1155MetadataExtension interface, as defined * in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP]. * * _Available since v3.1._ */ interface IERC1155MetadataURIUpgradeable is IERC1155Upgradeable { /** * @dev Returns the URI for token type `id`. * * If the `\{id\}` substring is present in the URI, it must be replaced by * clients with the actual token type ID. */ function uri(uint256 id) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165Upgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable { function __ERC165_init() internal onlyInitializing { } function __ERC165_init_unchained() internal onlyInitializing { } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165Upgradeable).interfaceId; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.0; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() initializer {} * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. */ bool private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Modifier to protect an initializer function from being invoked twice. */ modifier initializer() { // If the contract is initializing we ignore whether _initialized is set in order to support multiple // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the // contract may have been reentered. require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized"); bool isTopLevelCall = !_initializing; if (isTopLevelCall) { _initializing = true; _initialized = true; } _; if (isTopLevelCall) { _initializing = false; } } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} modifier, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } function _isConstructor() private view returns (bool) { return !AddressUpgradeable.isContract(address(this)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControlEnumerable.sol) pragma solidity ^0.8.0; import "./IAccessControlUpgradeable.sol"; /** * @dev External interface of AccessControlEnumerable declared to support ERC165 detection. */ interface IAccessControlEnumerableUpgradeable is IAccessControlUpgradeable { /** * @dev Returns one of the accounts that have `role`. `index` must be a * value between 0 and {getRoleMemberCount}, non-inclusive. * * Role bearers are not sorted in any particular way, and their ordering may * change at any point. * * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure * you perform all queries on the same block. See the following * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post] * for more information. */ function getRoleMember(bytes32 role, uint256 index) external view returns (address); /** * @dev Returns the number of accounts that have `role`. Can be used * together with {getRoleMember} to enumerate all bearers of a role. */ function getRoleMemberCount(bytes32 role) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControlUpgradeable.sol"; import "../utils/ContextUpgradeable.sol"; import "../utils/StringsUpgradeable.sol"; import "../utils/introspection/ERC165Upgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ``` * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ``` * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. */ abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable { function __AccessControl_init() internal onlyInitializing { } function __AccessControl_init_unchained() internal onlyInitializing { } struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role, _msgSender()); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", StringsUpgradeable.toHexString(uint160(account), 20), " is missing role ", StringsUpgradeable.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/structs/EnumerableSet.sol) pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ``` * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. */ library EnumerableSetUpgradeable { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastvalue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastvalue; // Update the index for the moved value set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { return _values(set._inner); } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values on the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControlUpgradeable { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: Apache-2.0 pragma solidity ^0.8.11; interface IWETH { function deposit() external payable; function withdraw(uint256 amount) external; function transfer(address to, uint256 value) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
{ "metadata": { "bytecodeHash": "none" }, "optimizer": { "enabled": true, "runs": 800 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
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A token is a representation of an on-chain or off-chain asset. The token page shows information such as price, total supply, holders, transfers and social links. Learn more about this page in our Knowledge Base.