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ERC-721
Overview
Max Total Supply
10,040 DEGN
Holders
1,084
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
2 DEGNLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
PFP
Compiler Version
v0.8.15+commit.e14f2714
Optimization Enabled:
Yes with 15000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.15; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol"; import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "./VRFConsumerBase.sol"; import "./ERC721A.sol"; import "./EPSInterface/IEPSDelegationRegister.sol"; /** * @dev These functions deal with verification of Merkle Trees proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = keccak256(abi.encodePacked(computedHash, proofElement)); } else { // Hash(current element of the proof + current computed hash) computedHash = keccak256(abi.encodePacked(proofElement, computedHash)); } } return computedHash; } } contract PFP is ERC721A, Ownable, VRFConsumerBase { using Strings for uint256; uint256 public constant MAX_TOKENS = 20000; string public constant BASE_EXTENSION = ".json"; string public _baseURIextended; address public _passAddress; bool public revealed = false; string public notRevealedUri = ""; uint256 public randStartPos; bytes32 public immutable vrfKeyHash; bytes32 public request_id; IEPSDelegationRegister public immutable EPS; bytes32 public snapshotMerkleRoot; bool public claimIsActive = false; mapping (address => uint256) public _claimedAmount; error ClaimExceedsAllowance(uint128 claim, uint128 allowance); error InvalidProof(); event WebaversePFPMint(uint256 amountMinted); event CollectionRevealed(uint256 randomStartPosition); constructor( address passAddress_, address epsAddress_, address _ChainlinkVRFCoordinator, address _ChainlinkLINKToken, bytes32 _ChainlinkKeyHash ) ERC721A("Degens of The Street", "DEGN") VRFConsumerBase(_ChainlinkVRFCoordinator, _ChainlinkLINKToken) { _passAddress = passAddress_; vrfKeyHash = _ChainlinkKeyHash; EPS = IEPSDelegationRegister(epsAddress_); } function setBaseURI(string memory baseURI_) external onlyOwner() { require(!revealed, "Collection revealed, cannot set URI"); _baseURIextended = baseURI_; } function _baseURI() internal view virtual override returns (string memory) { return _baseURIextended; } function setPassContract(address passAddress_) external onlyOwner { _passAddress = passAddress_; } function getPassContract() external view returns (address) { return _passAddress; } function reveal() external onlyOwner { if(!revealed) { getRandomNumber(); } } function setNotRevealedURI(string memory _notRevealedURI) external onlyOwner { notRevealedUri = _notRevealedURI; } function setMerkleRoot(bytes32 merkleRoot) public onlyOwner returns (bytes32) { snapshotMerkleRoot = merkleRoot; return snapshotMerkleRoot; } function flipClaimState() external onlyOwner { claimIsActive = !claimIsActive; } /** * Returns the tokenURI * Random starting positions can only be set before the token's metadata is revealed. * */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if(revealed == false) { return notRevealedUri; } string memory currentBaseURI = _baseURI(); return bytes(currentBaseURI).length > 0 ? string(abi.encodePacked(currentBaseURI, ((tokenId+randStartPos) % MAX_TOKENS).toString(), BASE_EXTENSION)) : ""; } function claimTokens(bytes32[] calldata merkleProof, uint256 numberOfTokens, uint256 allowance ) external { require(claimIsActive, "Claim is not active yet!"); require(totalSupply() + numberOfTokens <= MAX_TOKENS, "Claim would exceed max supply of tokens!"); address[] memory coldWallets = EPS.getAddresses(msg.sender, _passAddress, 1, true, true); for (uint256 i = 0; i < coldWallets.length; i++) { address coldWallet = coldWallets[i]; string memory coldWallet_str = Strings.toHexString(uint256(uint160(coldWallet)), 20); string memory claiming_str = string(abi.encodePacked(coldWallet_str, '_', allowance.toString())); if (MerkleProof.verify(merkleProof, snapshotMerkleRoot, keccak256(bytes(claiming_str)))) { if(_claimedAmount[coldWallet] + numberOfTokens <= allowance ) { _claimedAmount[coldWallet] += numberOfTokens; _safeMint(msg.sender, numberOfTokens); emit WebaversePFPMint(numberOfTokens); // Function exit 1: success return; } else { // Function exit 2: claim exceeds allowance revert ClaimExceedsAllowance(uint128(numberOfTokens), uint128(allowance - _claimedAmount[coldWallet])); } } } // Function exit 3: no matching proof revert InvalidProof(); } function mintTokens(uint256 numberOfTokens) external onlyOwner { require(!claimIsActive, "Claim is not finished yet!"); require(totalSupply() + numberOfTokens <= MAX_TOKENS, "Claim would exceed max supply of tokens!"); _safeMint(msg.sender, numberOfTokens); } function getClaimedAmount(address coldWallet) external view returns (uint256) { return _claimedAmount[coldWallet]; } function withdraw() external onlyOwner { uint256 balance = address(this).balance; payable(msg.sender).transfer(balance); } function getRandomNumber() internal returns (bytes32 requestId) { uint256 fee = 2 * 10 ** 18; require( LINK.balanceOf(address(this)) >= fee, "Please send Link token to the contract"); return requestRandomness(vrfKeyHash, fee); } // this is callback, it will be called by the vrf coordinator function fulfillRandomness(bytes32 requestId, uint256 randomness) internal override { request_id = requestId; if(randStartPos==0) { randStartPos = randomness % MAX_TOKENS; revealed = true; emit CollectionRevealed(randStartPos); } } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./VRF/LinkTokenInterface.sol"; import "./VRF/VRFRequestIDBase.sol"; /** **************************************************************************** * @notice Interface for contracts using VRF randomness * ***************************************************************************** * @dev PURPOSE * * @dev Reggie the Random Oracle (not his real job) wants to provide randomness * @dev to Vera the verifier in such a way that Vera can be sure he's not * @dev making his output up to suit himself. Reggie provides Vera a public key * @dev to which he knows the secret key. Each time Vera provides a seed to * @dev Reggie, he gives back a value which is computed completely * @dev deterministically from the seed and the secret key. * * @dev Reggie provides a proof by which Vera can verify that the output was * @dev correctly computed once Reggie tells it to her, but without that proof, * @dev the output is indistinguishable to her from a uniform random sample * @dev from the output space. * * @dev The purpose of this contract is to make it easy for unrelated contracts * @dev to talk to Vera the verifier about the work Reggie is doing, to provide * @dev simple access to a verifiable source of randomness. * ***************************************************************************** * @dev USAGE * * @dev Calling contracts must inherit from VRFConsumerBase, and can * @dev initialize VRFConsumerBase's attributes in their constructor as * @dev shown: * * @dev contract VRFConsumer { * @dev constructor(<other arguments>, address _vrfCoordinator, address _link) * @dev VRFConsumerBase(_vrfCoordinator, _link) public { * @dev <initialization with other arguments goes here> * @dev } * @dev } * * @dev The oracle will have given you an ID for the VRF keypair they have * @dev committed to (let's call it keyHash), and have told you the minimum LINK * @dev price for VRF service. Make sure your contract has sufficient LINK, and * @dev call requestRandomness(keyHash, fee, seed), where seed is the input you * @dev want to generate randomness from. * * @dev Once the VRFCoordinator has received and validated the oracle's response * @dev to your request, it will call your contract's fulfillRandomness method. * * @dev The randomness argument to fulfillRandomness is the actual random value * @dev generated from your seed. * * @dev The requestId argument is generated from the keyHash and the seed by * @dev makeRequestId(keyHash, seed). If your contract could have concurrent * @dev requests open, you can use the requestId to track which seed is * @dev associated with which randomness. See VRFRequestIDBase.sol for more * @dev details. (See "SECURITY CONSIDERATIONS" for principles to keep in mind, * @dev if your contract could have multiple requests in flight simultaneously.) * * @dev Colliding `requestId`s are cryptographically impossible as long as seeds * @dev differ. (Which is critical to making unpredictable randomness! See the * @dev next section.) * * ***************************************************************************** * @dev SECURITY CONSIDERATIONS * * @dev A method with the ability to call your fulfillRandomness method directly * @dev could spoof a VRF response with any random value, so it's critical that * @dev it cannot be directly called by anything other than this base contract * @dev (specifically, by the VRFConsumerBase.rawFulfillRandomness method). * * @dev For your users to trust that your contract's random behavior is free * @dev from malicious interference, it's best if you can write it so that all * @dev behaviors implied by a VRF response are executed *during* your * @dev fulfillRandomness method. If your contract must store the response (or * @dev anything derived from it) and use it later, you must ensure that any * @dev user-significant behavior which depends on that stored value cannot be * @dev manipulated by a subsequent VRF request. * * @dev Similarly, both miners and the VRF oracle itself have some influence * @dev over the order in which VRF responses appear on the blockchain, so if * @dev your contract could have multiple VRF requests in flight simultaneously, * @dev you must ensure that the order in which the VRF responses arrive cannot * @dev be used to manipulate your contract's user-significant behavior. * * @dev Since the ultimate input to the VRF is mixed with the block hash of the * @dev block in which the request is made, user-provided seeds have no impact * @dev on its economic security properties. They are only included for API * @dev compatability with previous versions of this contract. * * @dev Since the block hash of the block which contains the requestRandomness * @dev call is mixed into the input to the VRF *last*, a sufficiently powerful * @dev miner could, in principle, fork the blockchain to evict the block * @dev containing the request, forcing the request to be included in a * @dev different block with a different hash, and therefore a different input * @dev to the VRF. However, such an attack would incur a substantial economic * @dev cost. This cost scales with the number of blocks the VRF oracle waits * @dev until it calls responds to a request. */ abstract contract VRFConsumerBase is VRFRequestIDBase { /** * @notice fulfillRandomness handles the VRF response. Your contract must * @notice implement it. See "SECURITY CONSIDERATIONS" above for important * @notice principles to keep in mind when implementing your fulfillRandomness * @notice method. * * @dev VRFConsumerBase expects its subcontracts to have a method with this * @dev signature, and will call it once it has verified the proof * @dev associated with the randomness. (It is triggered via a call to * @dev rawFulfillRandomness, below.) * * @param requestId The Id initially returned by requestRandomness * @param randomness the VRF output */ function fulfillRandomness(bytes32 requestId, uint256 randomness) internal virtual; /** * @dev In order to keep backwards compatibility we have kept the user * seed field around. We remove the use of it because given that the blockhash * enters later, it overrides whatever randomness the used seed provides. * Given that it adds no security, and can easily lead to misunderstandings, * we have removed it from usage and can now provide a simpler API. */ uint256 private constant USER_SEED_PLACEHOLDER = 0; /** * @notice requestRandomness initiates a request for VRF output given _seed * * @dev The fulfillRandomness method receives the output, once it's provided * @dev by the Oracle, and verified by the vrfCoordinator. * * @dev The _keyHash must already be registered with the VRFCoordinator, and * @dev the _fee must exceed the fee specified during registration of the * @dev _keyHash. * * @dev The _seed parameter is vestigial, and is kept only for API * @dev compatibility with older versions. It can't *hurt* to mix in some of * @dev your own randomness, here, but it's not necessary because the VRF * @dev oracle will mix the hash of the block containing your request into the * @dev VRF seed it ultimately uses. * * @param _keyHash ID of public key against which randomness is generated * @param _fee The amount of LINK to send with the request * * @return requestId unique ID for this request * * @dev The returned requestId can be used to distinguish responses to * @dev concurrent requests. It is passed as the first argument to * @dev fulfillRandomness. */ function requestRandomness(bytes32 _keyHash, uint256 _fee) internal returns (bytes32 requestId) { LINK.transferAndCall(vrfCoordinator, _fee, abi.encode(_keyHash, USER_SEED_PLACEHOLDER)); // This is the seed passed to VRFCoordinator. The oracle will mix this with // the hash of the block containing this request to obtain the seed/input // which is finally passed to the VRF cryptographic machinery. uint256 vRFSeed = makeVRFInputSeed(_keyHash, USER_SEED_PLACEHOLDER, address(this), nonces[_keyHash]); // nonces[_keyHash] must stay in sync with // VRFCoordinator.nonces[_keyHash][this], which was incremented by the above // successful LINK.transferAndCall (in VRFCoordinator.randomnessRequest). // This provides protection against the user repeating their input seed, // which would result in a predictable/duplicate output, if multiple such // requests appeared in the same block. nonces[_keyHash] = nonces[_keyHash] + 1; return makeRequestId(_keyHash, vRFSeed); } LinkTokenInterface internal immutable LINK; address private immutable vrfCoordinator; // Nonces for each VRF key from which randomness has been requested. // // Must stay in sync with VRFCoordinator[_keyHash][this] mapping(bytes32 => uint256) /* keyHash */ /* nonce */ private nonces; /** * @param _vrfCoordinator address of VRFCoordinator contract * @param _link address of LINK token contract * * @dev https://docs.chain.link/docs/link-token-contracts */ constructor(address _vrfCoordinator, address _link) { vrfCoordinator = _vrfCoordinator; LINK = LinkTokenInterface(_link); } // rawFulfillRandomness is called by VRFCoordinator when it receives a valid VRF // proof. rawFulfillRandomness then calls fulfillRandomness, after validating // the origin of the call function rawFulfillRandomness(bytes32 requestId, uint256 randomness) external { require(msg.sender == vrfCoordinator, "Only VRFCoordinator can fulfill"); fulfillRandomness(requestId, randomness); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract VRFRequestIDBase { /** * @notice returns the seed which is actually input to the VRF coordinator * * @dev To prevent repetition of VRF output due to repetition of the * @dev user-supplied seed, that seed is combined in a hash with the * @dev user-specific nonce, and the address of the consuming contract. The * @dev risk of repetition is mostly mitigated by inclusion of a blockhash in * @dev the final seed, but the nonce does protect against repetition in * @dev requests which are included in a single block. * * @param _userSeed VRF seed input provided by user * @param _requester Address of the requesting contract * @param _nonce User-specific nonce at the time of the request */ function makeVRFInputSeed( bytes32 _keyHash, uint256 _userSeed, address _requester, uint256 _nonce ) internal pure returns (uint256) { return uint256(keccak256(abi.encode(_keyHash, _userSeed, _requester, _nonce))); } /** * @notice Returns the id for this request * @param _keyHash The serviceAgreement ID to be used for this request * @param _vRFInputSeed The seed to be passed directly to the VRF * @return The id for this request * * @dev Note that _vRFInputSeed is not the seed passed by the consuming * @dev contract, but the one generated by makeVRFInputSeed */ function makeRequestId(bytes32 _keyHash, uint256 _vRFInputSeed) internal pure returns (bytes32) { return keccak256(abi.encodePacked(_keyHash, _vRFInputSeed)); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface LinkTokenInterface { function allowance(address owner, address spender) external view returns (uint256 remaining); function approve(address spender, uint256 value) external returns (bool success); function balanceOf(address owner) external view returns (uint256 balance); function decimals() external view returns (uint8 decimalPlaces); function decreaseApproval(address spender, uint256 addedValue) external returns (bool success); function increaseApproval(address spender, uint256 subtractedValue) external; function name() external view returns (string memory tokenName); function symbol() external view returns (string memory tokenSymbol); function totalSupply() external view returns (uint256 totalTokensIssued); function transfer(address to, uint256 value) external returns (bool success); function transferAndCall( address to, uint256 value, bytes calldata data ) external returns (bool success); function transferFrom( address from, address to, uint256 value ) external returns (bool success); }
// SPDX-License-Identifier: MIT // Creator: Chiru Labs pragma solidity ^0.8.4; import '@openzeppelin/contracts/token/ERC721/IERC721.sol'; import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol'; import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Metadata.sol'; import '@openzeppelin/contracts/token/ERC721/extensions/IERC721Enumerable.sol'; import '@openzeppelin/contracts/utils/Address.sol'; import '@openzeppelin/contracts/utils/Context.sol'; import '@openzeppelin/contracts/utils/Strings.sol'; import '@openzeppelin/contracts/utils/introspection/ERC165.sol'; error ApprovalCallerNotOwnerNorApproved(); error ApprovalQueryForNonexistentToken(); error ApproveToCaller(); error ApprovalToCurrentOwner(); error BalanceQueryForZeroAddress(); error MintedQueryForZeroAddress(); error MintToZeroAddress(); error MintZeroQuantity(); error OwnerIndexOutOfBounds(); error OwnerQueryForNonexistentToken(); error TokenIndexOutOfBounds(); error TransferCallerNotOwnerNorApproved(); error TransferFromIncorrectOwner(); error TransferToNonERC721ReceiverImplementer(); error TransferToZeroAddress(); error UnableDetermineTokenOwner(); error UnableGetTokenOwnerByIndex(); error URIQueryForNonexistentToken(); /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata and Enumerable extension. Built to optimize for lower gas during batch mints. * * Assumes serials are sequentially minted starting at 0 (e.g. 0, 1, 2, 3..). * * Does not support burning tokens to address(0). * * Assumes that an owner cannot have more than the 2**128 - 1 (max value of uint128) of supply */ contract ERC721A is Context, ERC165, IERC721, IERC721Metadata, IERC721Enumerable { using Address for address; using Strings for uint256; struct TokenOwnership { address addr; uint64 startTimestamp; } struct AddressData { uint128 balance; uint128 numberMinted; } uint256 internal currentIndex; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to ownership details // An empty struct value does not necessarily mean the token is unowned. See ownershipOf implementation for details. mapping(uint256 => TokenOwnership) internal _ownerships; // Mapping owner address to address data mapping(address => AddressData) private _addressData; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC721Enumerable-totalSupply}. */ function totalSupply() public view override returns (uint256) { return currentIndex; } /** * @dev See {IERC721Enumerable-tokenByIndex}. */ function tokenByIndex(uint256 index) public view override returns (uint256) { if (index >= totalSupply()) revert TokenIndexOutOfBounds(); return index; } /** * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}. * This read function is O(totalSupply). If calling from a separate contract, be sure to test gas first. * It may also degrade with extremely large collection sizes (e.g >> 10000), test for your use case. */ function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) { if (index >= balanceOf(owner)) revert OwnerIndexOutOfBounds(); uint256 numMintedSoFar = totalSupply(); uint256 tokenIdsIdx; address currOwnershipAddr; // Counter overflow is impossible as the loop breaks when uint256 i is equal to another uint256 numMintedSoFar. unchecked { for (uint256 i; i < numMintedSoFar; i++) { TokenOwnership memory ownership = _ownerships[i]; if (ownership.addr != address(0)) { currOwnershipAddr = ownership.addr; } if (currOwnershipAddr == owner) { if (tokenIdsIdx == index) { return i; } tokenIdsIdx++; } } } revert UnableGetTokenOwnerByIndex(); } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view override returns (uint256) { if (owner == address(0)) revert BalanceQueryForZeroAddress(); return uint256(_addressData[owner].balance); } function _numberMinted(address owner) internal view returns (uint256) { if (owner == address(0)) revert MintedQueryForZeroAddress(); return uint256(_addressData[owner].numberMinted); } /** * Gas spent here starts off proportional to the maximum mint batch size. * It gradually moves to O(1) as tokens get transferred around in the collection over time. */ function ownershipOf(uint256 tokenId) internal view returns (TokenOwnership memory) { if (!_exists(tokenId)) revert OwnerQueryForNonexistentToken(); unchecked { for (uint256 curr = tokenId; curr >= 0; curr--) { TokenOwnership memory ownership = _ownerships[curr]; if (ownership.addr != address(0)) { return ownership; } } } revert UnableDetermineTokenOwner(); } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view override returns (address) { return ownershipOf(tokenId).addr; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { if (!_exists(tokenId)) revert URIQueryForNonexistentToken(); string memory baseURI = _baseURI(); return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ''; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overriden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ''; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public override { address owner = ERC721A.ownerOf(tokenId); if (to == owner) revert ApprovalToCurrentOwner(); if (_msgSender() != owner && !isApprovedForAll(owner, _msgSender())) revert ApprovalCallerNotOwnerNorApproved(); _approve(to, tokenId, owner); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view override returns (address) { if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken(); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public override { if (operator == _msgSender()) revert ApproveToCaller(); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ''); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public override { _transfer(from, to, tokenId); if (!_checkOnERC721Received(from, to, tokenId, _data)) revert TransferToNonERC721ReceiverImplementer(); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), */ function _exists(uint256 tokenId) internal view returns (bool) { return tokenId < currentIndex; } function _safeMint(address to, uint256 quantity) internal { _safeMint(to, quantity, ''); } /** * @dev Safely mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called for each safe transfer. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _safeMint( address to, uint256 quantity, bytes memory _data ) internal { _mint(to, quantity, _data, true); } /** * @dev Mints `quantity` tokens and transfers them to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `quantity` must be greater than 0. * * Emits a {Transfer} event. */ function _mint( address to, uint256 quantity, bytes memory _data, bool safe ) internal { uint256 startTokenId = currentIndex; if (to == address(0)) revert MintToZeroAddress(); if (quantity == 0) revert MintZeroQuantity(); _beforeTokenTransfers(address(0), to, startTokenId, quantity); // Overflows are incredibly unrealistic. // balance or numberMinted overflow if current value of either + quantity > 3.4e38 (2**128) - 1 // updatedIndex overflows if currentIndex + quantity > 1.56e77 (2**256) - 1 unchecked { _addressData[to].balance += uint128(quantity); _addressData[to].numberMinted += uint128(quantity); _ownerships[startTokenId].addr = to; _ownerships[startTokenId].startTimestamp = uint64(block.timestamp); uint256 updatedIndex = startTokenId; for (uint256 i; i < quantity; i++) { emit Transfer(address(0), to, updatedIndex); if (safe && !_checkOnERC721Received(address(0), to, updatedIndex, _data)) { revert TransferToNonERC721ReceiverImplementer(); } updatedIndex++; } currentIndex = updatedIndex; } _afterTokenTransfers(address(0), to, startTokenId, quantity); } /** * @dev Transfers `tokenId` from `from` to `to`. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) private { TokenOwnership memory prevOwnership = ownershipOf(tokenId); bool isApprovedOrOwner = (_msgSender() == prevOwnership.addr || getApproved(tokenId) == _msgSender() || isApprovedForAll(prevOwnership.addr, _msgSender())); if (!isApprovedOrOwner) revert TransferCallerNotOwnerNorApproved(); if (prevOwnership.addr != from) revert TransferFromIncorrectOwner(); if (to == address(0)) revert TransferToZeroAddress(); _beforeTokenTransfers(from, to, tokenId, 1); // Clear approvals from the previous owner _approve(address(0), tokenId, prevOwnership.addr); // Underflow of the sender's balance is impossible because we check for // ownership above and the recipient's balance can't realistically overflow. // Counter overflow is incredibly unrealistic as tokenId would have to be 2**256. unchecked { _addressData[from].balance -= 1; _addressData[to].balance += 1; _ownerships[tokenId].addr = to; _ownerships[tokenId].startTimestamp = uint64(block.timestamp); // If the ownership slot of tokenId+1 is not explicitly set, that means the transfer initiator owns it. // Set the slot of tokenId+1 explicitly in storage to maintain correctness for ownerOf(tokenId+1) calls. uint256 nextTokenId = tokenId + 1; if (_ownerships[nextTokenId].addr == address(0)) { if (_exists(nextTokenId)) { _ownerships[nextTokenId].addr = prevOwnership.addr; _ownerships[nextTokenId].startTimestamp = prevOwnership.startTimestamp; } } } emit Transfer(from, to, tokenId); _afterTokenTransfers(from, to, tokenId, 1); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve( address to, uint256 tokenId, address owner ) private { _tokenApprovals[tokenId] = to; emit Approval(owner, to, tokenId); } /** * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address. * The call is not executed if the target address is not a contract. * * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver(to).onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) revert TransferToNonERC721ReceiverImplementer(); else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before a set of serially-ordered token ids are about to be transferred. This includes minting. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. */ function _beforeTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} /** * @dev Hook that is called after a set of serially-ordered token ids have been transferred. This includes * minting. * * startTokenId - the first token id to be transferred * quantity - the amount to be transferred * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. */ function _afterTokenTransfers( address from, address to, uint256 startTokenId, uint256 quantity ) internal virtual {} }
// SPDX-License-Identifier: MIT // EPS Contracts v2.0.0 // www.eternalproxy.com /** @dev IOAT - Interface */ pragma solidity ^0.8.15; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; /** * @dev OAT interface */ interface IOAT is IERC20 { /** * * @dev emitToken * */ function emitToken(address receiver_, uint256 amount_) external; /** * * @dev addEmitter * */ function addEmitter(address emitter_) external; /** * * @dev removeEmitter * */ function removeEmitter(address emitter_) external; /** * * @dev setTreasury * */ function setTreasury(address treasury_) external; }
// SPDX-License-Identifier: MIT // EPS Contracts v2.0.0 // www.eternalproxy.com /** @dev IERCOmnReceiver - Interface */ pragma solidity ^0.8.15; interface IERCOmnReceiver { function onTokenTransfer( address sender, uint256 value, bytes memory data ) external payable; }
// SPDX-License-Identifier: CC0-1.0 // EPS Contracts v2.0.0 // www.eternalproxy.com /** @dev EPS Delegation Register - Interface */ pragma solidity ^0.8.15; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol"; import "./IOAT.sol"; import "./IERCOmnReceiver.sol"; /** * * @dev Implementation of the EPS proxy register interface. * */ interface IEPSDelegationRegister { // ====================================================== // ENUMS and STRUCTS // ====================================================== // Scope of a delegation: global, collection or token enum DelegationScope { global, collection, token } // Time limit of a delegation: eternal or time limited enum DelegationTimeLimit { eternal, limited } // The Class of a delegation: primary, secondary or rental enum DelegationClass { primary, secondary, rental } // The status of a delegation: enum DelegationStatus { live, pending } // Data output format for a report (used to output both hot and cold // delegation details) struct DelegationReport { address hot; address cold; DelegationScope scope; DelegationClass class; DelegationTimeLimit timeLimit; address collection; uint256 tokenId; uint40 startDate; uint40 endDate; bool validByDate; bool validBilaterally; bool validTokenOwnership; bool[25] usageTypes; address key; uint96 controlInteger; bytes data; DelegationStatus status; } // Delegation record struct DelegationRecord { address hot; uint96 controlInteger; address cold; uint40 startDate; uint40 endDate; DelegationStatus status; } // If a delegation is for a collection, or has additional data, it will need to read the delegation metadata struct DelegationMetadata { address collection; uint256 tokenId; bytes data; } // Details of a hot wallet lock struct LockDetails { uint40 lockStart; uint40 lockEnd; } // Validity dates when checking a delegation struct ValidityDates { uint40 start; uint40 end; } // Delegation struct to hold details of a new delegation struct Delegation { address hot; address cold; address[] targetAddresses; uint256 tokenId; bool tokenDelegation; uint8[] usageTypes; uint40 startDate; uint40 endDate; uint16 providerCode; DelegationClass delegationClass; uint96 subDelegateKey; bytes data; DelegationStatus status; } // Addresses associated with a delegation check struct DelegationCheckAddresses { address hot; address cold; address targetCollection; } // Classes associated with a delegation check struct DelegationCheckClasses { bool secondary; bool rental; bool token; } // Migrated record data struct MigratedRecord { address hot; address cold; } // ====================================================== // CUSTOM ERRORS // ====================================================== error UsageTypeAlreadyDelegated(uint256 usageType); error CannotDeleteValidDelegation(); error CannotDelegatedATokenYouDontOwn(); error IncorrectAdminLevel(uint256 requiredLevel); error OnlyParticipantOrAuthorisedSubDelegate(); error HotAddressIsLockedAndCannotBeDelegatedTo(); error InvalidDelegation(); error ToMuchETHForPendingPayments(uint256 sent, uint256 required); error UnknownAmount(); error InvalidERC20Payment(); error IncorrectProxyRegisterFee(); error UnrecognisedEPSAPIAmount(); error CannotRevokeAllForRegisterAdminHierarchy(); // ====================================================== // EVENTS // ====================================================== event DelegationMade( address indexed hot, address indexed cold, address targetAddress, uint256 tokenId, bool tokenDelegation, uint8[] usageTypes, uint40 startDate, uint40 endDate, uint16 providerCode, DelegationClass delegationClass, uint96 subDelegateKey, bytes data, DelegationStatus status ); event DelegationRevoked(address hot, address cold, address delegationKey); event DelegationPaid(address delegationKey); event AllDelegationsRevokedForHot(address hot); event AllDelegationsRevokedForCold(address cold); event Transfer(address indexed from, address indexed to, uint256 value); /** * * * @dev getDelegationRecord * * */ function getDelegationRecord(address delegationKey_) external view returns (DelegationRecord memory); /** * * * @dev isValidDelegation * * */ function isValidDelegation( address hot_, address cold_, address collection_, uint256 usageType_, bool includeSecondary_, bool includeRental_ ) external view returns (bool isValid_); /** * * * @dev getAddresses - Get all currently valid addresses for a hot address. * - Pass in address(0) to return records that are for ALL collections * - Pass in a collection address to get records for just that collection * - Usage type must be supplied. Only records that match usage type will be returned * * */ function getAddresses( address hot_, address collection_, uint256 usageType_, bool includeSecondary_, bool includeRental_ ) external view returns (address[] memory addresses_); /** * * * @dev beneficiaryBalanceOf: Returns the beneficiary balance * * */ function beneficiaryBalanceOf( address queryAddress_, address contractAddress_, uint256 usageType_, bool erc1155_, uint256 id_, bool includeSecondary_, bool includeRental_ ) external view returns (uint256 balance_); /** * * * @dev beneficiaryOf * * */ function beneficiaryOf( address collection_, uint256 tokenId_, uint256 usageType_, bool includeSecondary_, bool includeRental_ ) external view returns ( address primaryBeneficiary_, address[] memory secondaryBeneficiaries_ ); /** * * * @dev delegationFromColdExists - check a cold delegation exists * * */ function delegationFromColdExists(address cold_, address delegationKey_) external view returns (bool); /** * * * @dev delegationFromHotExists - check a hot delegation exists * * */ function delegationFromHotExists(address hot_, address delegationKey_) external view returns (bool); /** * * * @dev getAllForHot - Get all delegations at a hot address, formatted nicely * * */ function getAllForHot(address hot_) external view returns (DelegationReport[] memory); /** * * * @dev getAllForCold - Get all delegations at a cold address, formatted nicely * * */ function getAllForCold(address cold_) external view returns (DelegationReport[] memory); /** * * * @dev makeDelegation - A direct call to setup a new proxy record * * */ function makeDelegation( address hot_, address cold_, address[] memory targetAddresses_, uint256 tokenId_, bool tokenDelegation_, uint8[] memory usageTypes_, uint40 startDate_, uint40 endDate_, uint16 providerCode_, DelegationClass delegationClass_, //0 = primary, 1 = secondary, 2 = rental uint96 subDelegateKey_, bytes memory data_ ) external payable; /** * * * @dev getDelegationKey - get the link hash to the delegation metadata * * */ function getDelegationKey( address hot_, address cold_, address targetAddress_, uint256 tokenId_, bool tokenDelegation_, uint96 controlInteger_, uint40 startDate_, uint40 endDate_ ) external pure returns (address); /** * * * @dev getHotAddressLockDetails * * */ function getHotAddressLockDetails(address hot_) external view returns (LockDetails memory, address[] memory); /** * * * @dev lockAddressUntilDate * * */ function lockAddressUntilDate(uint40 unlockDate_) external; /** * * * @dev lockAddress * * */ function lockAddress() external; /** * * * @dev unlockAddress * * */ function unlockAddress() external; /** * * * @dev addLockBypassAddress * * */ function addLockBypassAddress(address bypassAddress_) external; /** * * * @dev removeLockBypassAddress * * */ function removeLockBypassAddress(address bypassAddress_) external; /** * * * @dev revokeRecord: Revoking a single record with Key * * */ function revokeRecord(address delegationKey_, uint96 subDelegateKey_) external; /** * * * @dev revokeGlobalAll * * */ function revokeRecordOfGlobalScopeForAllUsages(address participant2_) external; /** * * * @dev revokeAllForCold: Cold calls and revokes ALL * * */ function revokeAllForCold(address cold_, uint96 subDelegateKey_) external; /** * * * @dev revokeAllForHot: Hot calls and revokes ALL * * */ function revokeAllForHot() external; /** * * * @dev deleteExpired: ANYONE can delete expired records * * */ function deleteExpired(address delegationKey_) external; /** * * * @dev setRegisterFee: set the fee for accepting a registration: * * */ function setRegisterFees( uint256 registerFee_, address erc20_, uint256 erc20Fee_ ) external; /** * * * @dev setRewardTokenAndRate * * */ function setRewardTokenAndRate(address rewardToken_, uint88 rewardRate_) external; /** * * * @dev lockRewardRate * * */ function lockRewardRate() external; /** * * * @dev setLegacyOff * * */ function setLegacyOff() external; /** * * * @dev setENSName (used to set reverse record so interactions with this contract are easy to * identify) * * */ function setENSName(string memory ensName_) external; /** * * * @dev setENSReverseRegistrar * * */ function setENSReverseRegistrar(address ensReverseRegistrar_) external; /** * * * @dev setTreasuryAddress: set the treasury address: * * */ function setTreasuryAddress(address treasuryAddress_) external; /** * * * @dev setDecimalsAndBalance * * */ function setDecimalsAndBalance(uint8 decimals_, uint256 balance_) external; /** * * * @dev withdrawETH: withdraw eth to the treasury: * * */ function withdrawETH(uint256 amount_) external returns (bool success_); /** * * * @dev withdrawERC20: Allow any ERC20s to be withdrawn Note, this is provided to enable the * withdrawal of payments using valid ERC20s. Assets sent here in error are retrieved with * rescueERC20 * * */ function withdrawERC20(IERC20 token_, uint256 amount_) external; /** * * * @dev isLevelAdmin * * */ function isLevelAdmin( address receivedAddress_, uint256 level_, uint96 key_ ) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv( uint256 x, uint256 y, uint256 denominator, Rounding rounding ) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10**64) { value /= 10**64; result += 64; } if (value >= 10**32) { value /= 10**32; result += 32; } if (value >= 10**16) { value /= 10**16; result += 16; } if (value >= 10**8) { value /= 10**8; result += 8; } if (value >= 10**4) { value /= 10**4; result += 4; } if (value >= 10**2) { value /= 10**2; result += 2; } if (value >= 10**1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0); } } }
// 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 IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @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] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [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 functionCallWithValue(target, data, 0, "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"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, 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) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or 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 { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // 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 /// @solidity memory-safe-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 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Enumerable is IERC721 { /** * @dev Returns the total amount of tokens stored by the contract. */ function totalSupply() external view returns (uint256); /** * @dev Returns a token ID owned by `owner` at a given `index` of its token list. * Use along with {balanceOf} to enumerate all of ``owner``'s tokens. */ function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256); /** * @dev Returns a token ID at a given `index` of all the tokens stored by the contract. * Use along with {totalSupply} to enumerate all tokens. */ function tokenByIndex(uint256 index) external view returns (uint256); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/draft-IERC20Permit.sol"; import "../../../utils/Address.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using Address for address; function safeTransfer( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IERC20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IERC20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender) + value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IERC20 token, address spender, uint256 value ) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); uint256 newAllowance = oldAllowance - value; _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } } function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @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); /** * @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); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.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 IERC1155 is IERC165 { /** * @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 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: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
{ "remappings": [], "optimizer": { "enabled": true, "runs": 15000 }, "evmVersion": "london", "libraries": {}, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"passAddress_","type":"address"},{"internalType":"address","name":"epsAddress_","type":"address"},{"internalType":"address","name":"_ChainlinkVRFCoordinator","type":"address"},{"internalType":"address","name":"_ChainlinkLINKToken","type":"address"},{"internalType":"bytes32","name":"_ChainlinkKeyHash","type":"bytes32"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"ApprovalQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"ApprovalToCurrentOwner","type":"error"},{"inputs":[],"name":"ApproveToCaller","type":"error"},{"inputs":[],"name":"BalanceQueryForZeroAddress","type":"error"},{"inputs":[{"internalType":"uint128","name":"claim","type":"uint128"},{"internalType":"uint128","name":"allowance","type":"uint128"}],"name":"ClaimExceedsAllowance","type":"error"},{"inputs":[],"name":"InvalidProof","type":"error"},{"inputs":[],"name":"MintToZeroAddress","type":"error"},{"inputs":[],"name":"MintZeroQuantity","type":"error"},{"inputs":[],"name":"OwnerIndexOutOfBounds","type":"error"},{"inputs":[],"name":"OwnerQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"TokenIndexOutOfBounds","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToNonERC721ReceiverImplementer","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"UnableDetermineTokenOwner","type":"error"},{"inputs":[],"name":"UnableGetTokenOwnerByIndex","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"randomStartPosition","type":"uint256"}],"name":"CollectionRevealed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amountMinted","type":"uint256"}],"name":"WebaversePFPMint","type":"event"},{"inputs":[],"name":"BASE_EXTENSION","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"EPS","outputs":[{"internalType":"contract IEPSDelegationRegister","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_TOKENS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_baseURIextended","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"_claimedAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"_passAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimIsActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32[]","name":"merkleProof","type":"bytes32[]"},{"internalType":"uint256","name":"numberOfTokens","type":"uint256"},{"internalType":"uint256","name":"allowance","type":"uint256"}],"name":"claimTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"flipClaimState","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"coldWallet","type":"address"}],"name":"getClaimedAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPassContract","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"numberOfTokens","type":"uint256"}],"name":"mintTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"notRevealedUri","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"randStartPos","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"requestId","type":"bytes32"},{"internalType":"uint256","name":"randomness","type":"uint256"}],"name":"rawFulfillRandomness","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"request_id","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"reveal","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"revealed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"baseURI_","type":"string"}],"name":"setBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"merkleRoot","type":"bytes32"}],"name":"setMerkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_notRevealedURI","type":"string"}],"name":"setNotRevealedURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"passAddress_","type":"address"}],"name":"setPassContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"snapshotMerkleRoot","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"vrfKeyHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000543d43f390b7d681513045e8a85707438c463d80000000000000000000000000888888888888660f286a7c06cfa3407d09af44b2000000000000000000000000f0d54349addcf704f77ae15b96510dea15cb7952000000000000000000000000514910771af9ca656af840dff83e8264ecf986caaa77729d3466ca35ae8d28b3bbac7cc36a5031efdc430821c02bc31a238af445
-----Decoded View---------------
Arg [0] : passAddress_ (address): 0x543D43F390b7d681513045e8a85707438c463d80
Arg [1] : epsAddress_ (address): 0x888888888888660F286A7C06cfa3407d09af44B2
Arg [2] : _ChainlinkVRFCoordinator (address): 0xf0d54349aDdcf704F77AE15b96510dEA15cb7952
Arg [3] : _ChainlinkLINKToken (address): 0x514910771AF9Ca656af840dff83E8264EcF986CA
Arg [4] : _ChainlinkKeyHash (bytes32): 0xaa77729d3466ca35ae8d28b3bbac7cc36a5031efdc430821c02bc31a238af445
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000543d43f390b7d681513045e8a85707438c463d80
Arg [1] : 000000000000000000000000888888888888660f286a7c06cfa3407d09af44b2
Arg [2] : 000000000000000000000000f0d54349addcf704f77ae15b96510dea15cb7952
Arg [3] : 000000000000000000000000514910771af9ca656af840dff83e8264ecf986ca
Arg [4] : aa77729d3466ca35ae8d28b3bbac7cc36a5031efdc430821c02bc31a238af445
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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.