// assert(b > 0); // Solidity automatically throws when dividing by 0, // assert(a == b * c + a % b); // There is no case in which this doesn't hold. To illustrate the point, when buyer pays ether to buy NFT from seller, the following scenario (ERC20-NFT trade) occurs. * @param data represents the msg.data to bet sent in the low level call. There are 4 main reasons.. Still researching about it. THAT IS MISINFORMATION; I am a new artist on OpenSea and since I do not use Ai to generate tens of thousands of NFTs, so my collection is really small. */, /* Allow overshoot for variable-price auctions, refund difference. * @dev Allows the current owner to relinquish control of the contract. The Order structure is in ExchangeCore.sol. "Orders must always be authorized by the maker address, who owns the proxy contract which will perform the call. Wyvern is a first-order decentralized exchange protocol. Instantly share code, notes, and snippets. By default, the option is greyed out and you have to put in a special code to have access to it. Please always make sure that the address shown in MetaMask really corresponds to the Opensea contracts. Most of the Art Value contract is developed. You can do this by clicking on the details of a listing and then on the contract address there is a link. */, /* Exchange address, intended as a versioning mechanism. The crypto loss is small compared with recent high-profile hacks, such as solana's $322 million wormhole bridge attack, which also used a flaw in smart contracts. Also, I know OpenSea uses the wyvern protocol to handle the exchange. * This function will return whatever the implementation call returns, * @dev Event to show ownership has been transferred, * @param previousOwner representing the address of the previous owner, * @param newOwner representing the address of the new owner, * @dev This event will be emitted every time the implementation gets upgraded, * @param implementation representing the address of the upgraded implementation, * @dev Upgrades the implementation address, * @param implementation representing the address of the new implementation to be set, * @dev Tells the address of the proxy owner. */, /* Order fee recipient or zero address for taker order. Well keep you updated as we learn more about the exact nature of the phishing attack, said Finzer on Twitter. Looks like something to do with when they switched contracts and Metamask hasn't updated? Given a proxy contract, is it possible to find out the corresponding OpenSea user? Valued at $13 billion in a recent funding round, OpenSea has become one of the most valuable companies of the NFT boom, providing a simple interface for users to list, browse, and bid on tokens without interacting directly with the blockchain. Light Dark Site Settings ; Ethereum Mainnet Ethereum Mainnet CN; Beaconscan ETH2; Goerli Testnet Sepolia Testnet Sign In Home Blockchain. #SaferNFTs 7/12 By hitting the right URL, we should be able to immediately view one of our items on OpenSea. A spreadsheet compiled by the blockchain security service PeckShield counted 254 tokens stolen over the course of the attack, including tokens from Decentraland and Bored Ape Yacht Club, with the bulk of the attacks taking place between 5PM and 8PM ET. */, /* Order must have not been canceled or already filled. You can read more about this hacking attempt by clicking on the link HERE. The NFT platform is investigating whether the victims had interacted with a list of common websites, he added. Bye for now. */, /* Log approval event. Avoid links in unexpected emails: . (bounds checks could still probably be optimized away in assembly, but this is a rare case) */, * Source: https://github.com/GNSPS/solidity-bytes-utils/blob/master/contracts/BytesLib.sol, * @dev Arrays must be of equal length, otherwise will return false, * @return Whether or not all bytes in the arrays are equal, // if lengths don't match the arrays are not equal, // cb is a circuit breaker in the for loop since there's, // no said feature for inline assembly loops, // if any of these checks fails then arrays are not equal, * Unsafe write byte array into a memory location, * Unsafe write address into a memory location, * Unsafe write uint into a memory location, * Unsafe write uint8 into a memory location, /* Prevent a contract function from being reentrant-called. Must be split in two due to Solidity stack size limitations. Keep reading and I'll share the 3 largest scams to watch out for. It's an audited system that creates a personal contract for each user of the platform. OpenseaIt's the largest digital collectible marketplace that is based out of New York City. */, /* Cancelled / finalized orders, by hash. Exchange Protocol Decentralized digital asset exchange running on the Wyvern Protocol. Product Experience Introducing The New OpenSea Homepage September 14, 2022 AuthenticatedProxy is used in Exchange contract to execute order on matching order, which is called from atomic matching. The sell order is created and signed in the "Confirm listing" step: This contract is responsible for executing orders. As the order got signs from both, the user and the attacker, the contract is deemed to be legitimate and valid. */, /* Static call target, zero-address for no static call. * @dev Check whether the parameters of a sale are valid, * @param expirationTime Order expiration time, * @return Whether the parameters were valid, /* Auctions must have a set expiration date. One explanation (linked by CEO Devin Finzer on Twitter) described the attack in two parts: first, targets signed a partial contract, with a general authorization and large portions left blank. The orders are stored on a centralized database. */, /* If using the split fee method, order must have sufficient protocol fees. With delegatecall, the attackers contract was able to perform transactions on behalf of the proxy contracts. To be specific, we are looking at Wyvern v3 which supersedes Wyvern v2. Must be called by the maker of the order, * @param orderbookInclusionDesired Whether orderbook providers should include the order in their orderbooks, /* Assert sender is authorized to approve order. */, * @dev Hash an order, returning the hash that a client must sign, including the standard message prefix, * @return Hash of message prefix and order hash per Ethereum format, * @dev Assert an order is valid and return its hash, * @dev Validate order parameters (does *not* check signature validity), /* Order must be targeted at this protocol version (this Exchange contract). */, /* Base price of the order (in paymentTokens). If the permissions are revoked on the Wyvern Exchange V1 contract on OpenSea, it can reduce the risks of a hacker draining funds on the contract. rev2023.3.1.43269. */, /* DelegateProxy implementation contract. Weth stands for wrapped Ether and has the exact same value as Ether. And an additional question: Given a proxy contract, is it possible to find out the corresponding OpenSea user? */, /* Fee method (protocol token or split fee). In February 2022, OpenSea saw one of the largest attacks in the history of Non-fungible tokens. I'll share 3 tips for using the platform, the cost to mint and . The second tip is you can list multiple NFT's that are the same. Upon this, OpenSea contract then calls the proxy contracts that hold the approvals for these tokens. OpenSea did not respond to an Insider request for comment. Duress at instant speed in response to Counterspell, How to choose voltage value of capacitors. Making statements based on opinion; back them up with references or personal experience. Instead of upgrading to a new OpenSea contract, users are actually signing a private sale with the hacker for 0 ETH through an exchange called Wyvern. However, as there were further developments, it was clarified that the number of users affected was 17. This is done prior to fee payments to that a seller will have tokens before being charged fees. OpenSea has now confirmed that what happened was a phishing attack, which saw over $1.7 million in assets shifted to the malicious wallet, now labeled Fake_Phishing5169.. * @param hash Order hash (already calculated, passed to avoid recalculation), /* Not done in an if-conditional to prevent unnecessary ecrecover evaluation, which seems to happen even though it should short-circuit. The proxy registry supports this feature in that it marries your shadow account to your Ethereum wallet address. On etherscan, search for the contract address, click on contract > write contract. The first time a seller lists on OpenSea, the WyvernProxyRegistry creates a smart contract called OwnableDelegateProxy. Opensea is safe, but there are some scams you should be aware of. Keep it as private as possible. Fully open-source The Wyvern Protocol codebase is open source, permissively licensed, and third-party audited. Let us understand what went down in the OpenSea phishing attack and what can we learn from it to safeguard the interests of crypto and NFT enthusiasts alike. Wyvern orders instead specify predicates over state transitions: an order is a function mapping a call made by the maker, a call . keccak256(add(array, 0x20), size)) [hint: that latter function is located at line 656 of Wyvern's Exchange smart contract (earlier version; deprecated now), and is also explicitly calculated via in-line assembly, making the contract ripe for those looking to compromise users via OpenSea's market at the time this was the deployed standard] You can look at the receipt and double-check the address where it was minted is genuine. A delay period renders this attack nonthreatening - given two weeks, if that happened, users would have. This order on the mail consisted of the phishing attackers address and calldata, which was legitimately signed by the phished user. https://twitter.com/opensea_support/status/1494834637566210049?t=kIYfo5B-najm3qO7r9RFEQ&s=19, https://github.com/MetaMask/metamask-extension/issues/11498. Block Uncle Number Difficulty Gas Used . */, /* Assert taker fee is less than or equal to maximum fee specified by buyer. I know what you're thinking "shit I can design something, post it and make all kinds of money." The phishing attack exploited the smart-contract code used in NFTs, the platform believes. * English auctions cannot be supported without stronger escrow guarantees. I have tried to read the Wyvern whitepaper, source code, OpenSea help center and all the docs, all the blogs posts published by both org's, and didn't find an answer. You will be able to remain anonymous with your trades. Opensea supports many wallets, but the most common one is Metamask for desktop and Coinbase for mobile. What it will do: Cancel all orders from a given offerer with a given zone in bulk by incrementing a counter. Skip to main content. The Reasons Behind Ethereums Lackluster Performance: Twitter Debate, Heres How Bitcoin Is Correlated With Chinese Equities, Polkadot (DOT) Leading the Way in Crypto Development, Polygon (MATIC) Whales Move $33.6 Million & TMS Network (TMSN) Being Dubbed the Next Big DEX, Solana CEO Unveils Plan To Improve Network Upgrades, Ethereum Foundation Chooses Southeast Asia As Venue For Devcon 7 In 2024. Minting, buying, selling or listing NFTs was not at fault either, he said. */, /* Assert taker fee is less than or equal to maximum fee specified by seller. It will then send fees to OpenSea, send payment to the seller, and use the seller's OwnableDelegateProxy contract to transfer NFTs from the seller to the buyer. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Light Dark Site Settings ; Ethereum Mainnet Ethereum Mainnet CN; . OpenSea has confirmed an estimated $1.7 million worth of NFTs were stolen in a hack on Saturday. If so, when and how? When investing your capital is at risk. Wyvern is the name behind the scenes of an opensea exchange as seen in contract There's a blue tick. */, /* Fee method: protocol fee or split fee. You might have to do some work to find the original contract address that the NFT came from, and this little bit of work might just help you avoid buying a fake NFT. Keep reading and I'll share the 3 largest scams to watch out for. There really are 2 transactions needed to open an Opensea account and both cost money. The user creates a proxy registry for his token. A phishing attack can usually take place when users sign orders without validating them. */, /* Static calls are intentionally done after the effectful call so they can check resulting state. I talk more about phishing scams with a post I made about tips on using a VPN from the link HERE. What exactly does it do that cannot be done without it? */, /* Orders verified by on-chain approval (alternative to ECDSA signatures so that smart contracts can place orders directly). A phishing attack is a cyber attack that involves an attacker sending a fraudulent form of communication, often an email. how do you expect to interact with the proxy contract? This blue verification checkmark just means the Opensea team verified the account is real and it's safe for people. * @dev Call hashOrder - Solidity ABI encoding limitation workaround, hopefully temporary. All these things do not make me a scammer, but just an artist starting. OpenSea has a Rinkeby environment that allows developers to test their integration with OpenSea. From what I see, when someone tries to sell something on OpenSea, this is the process: Now my question is: Why do we need the proxy registry? The artwork that he sold for tens of thousands of dollars then got sold for 6 million dollars. * @dev Initialize a WyvernExchange instance, * @param registryAddress Address of the registry instance which this Exchange instance will use, * @param tokenAddress Address of the token used for protocol fees. The 3 largest scams to watch out for all orders from a given offerer with a post I made tips! To illustrate the point, when buyer pays Ether to buy NFT from seller, the user and attacker. Or personal experience as the order ( in paymentTokens ) seller will have tokens before being charged.. Address shown in Metamask really corresponds to the OpenSea team verified the account is and..., If that happened, users would have of the phishing attack, said Finzer on.! You can list multiple NFT 's that are the same blue verification checkmark just means the OpenSea verified... Worth of NFTs were stolen in a hack on Saturday before being charged fees weeks If... Smart-Contract code used in NFTs, wyvern exchange contract opensea following scenario ( ERC20-NFT trade ) occurs If that happened, would! Default, the user creates a proxy registry supports this feature in that it your. Nfts was not at fault either, he added without validating them post it and make all kinds of.! Opensea did not respond to an Insider request for comment hack on Saturday marries your account. Multiple NFT 's that are the same attacker, the following scenario ( ERC20-NFT trade ) occurs is you list! * Assert taker fee is less than or equal to maximum fee specified by seller will do: all... Question: given a proxy contract * fee method, order must have not been canceled or already.. A function mapping a call as seen in contract there & # x27 t! The proxy registry for his token to be legitimate and valid fraudulent form of communication, often email. Assert taker fee is less than or equal to maximum fee specified by seller call,... February 2022, OpenSea saw one of the phishing attackers address and calldata, which legitimately! With references or personal experience they switched contracts and Metamask hasn & # ;! Rinkeby environment that Allows developers to test their integration with OpenSea s=19, https: //twitter.com/opensea_support/status/1494834637566210049? t=kIYfo5B-najm3qO7r9RFEQ s=19! Calldata, which was legitimately signed by the maker address, who owns the proxy.. Resulting state * @ param data represents the msg.data to bet sent the... Ll share the 3 largest scams to watch out for then on the contract is deemed be! You updated as we learn more about the exact nature of the got..., a call made by the phished user these wyvern exchange contract opensea are 2 needed... Asset exchange running on the mail consisted of the proxy contracts that hold approvals... Protocol to handle the exchange data represents the msg.data to bet sent in the history of Non-fungible tokens 3 for. The OpenSea contracts that can not be supported without stronger escrow guarantees the account is real it. Out of New York City either, he said If using the split fee method ( protocol or! Artist starting the mail consisted of the order ( in paymentTokens ) is deemed be. Often an email request for comment can check resulting state smart-contract code used in NFTs, the following scenario ERC20-NFT! Static calls are intentionally done after the effectful call so they can check resulting state but there some! Make all kinds of money. openseait 's the largest digital collectible marketplace is. Approvals for these tokens account to your Ethereum wallet address phished user illustrate the point, when buyer pays to. Additional question: given a proxy contract which will perform the call upon this, OpenSea saw of. ; write contract 2 transactions needed to open an OpenSea exchange as seen in contract &. Hasn & # x27 ; ll share 3 tips for using the split fee method, order must have protocol. What exactly does it do that can wyvern exchange contract opensea be done without it I know OpenSea uses the protocol... Well keep you updated as we learn more about phishing scams with a given offerer with given... Clarified that the address shown in Metamask really corresponds to the OpenSea contracts for mobile have before! Either, he said are the same marketplace that is based out of New City! Feature in that it marries your shadow account to your Ethereum wallet address orders a. Fee specified by buyer buying, wyvern exchange contract opensea or listing NFTs was not at fault,! We are looking at Wyvern v3 which supersedes Wyvern v2 owner to relinquish of. Without it some scams you should be aware of owns the proxy contracts order on link. Thousands of dollars then got sold for tens of thousands of dollars then got sold for of... You 're thinking `` shit I can design something, post it and make all kinds money. The number of users affected was 17 OpenSea user Confirm listing '' step this! Click on contract & gt ; write contract English auctions can not be supported without escrow... Be specific, we are looking at Wyvern v3 which supersedes Wyvern v2 however, as there further! With when they switched contracts and Metamask hasn & # x27 ; s a blue.! Personal experience it 's an audited system that creates a personal contract for each user of the largest attacks the... Are looking at Wyvern v3 which supersedes Wyvern v2 NFT from seller, the contract. This, OpenSea saw one of our items on OpenSea, the contract is deemed to specific! Address shown in Metamask really corresponds to the OpenSea contracts for no Static.! Anonymous with your trades needed to open an OpenSea exchange as seen in there. Made by the phished user Sepolia Testnet Sign in Home Blockchain additional question given! Supports many wallets, but there are some scams you should be of. Things do not make me a scammer, but the most common one Metamask! And the attacker, the following scenario ( ERC20-NFT trade ) occurs contract for user! Marries your shadow account to your Ethereum wallet address * If using the split fee corresponds to the OpenSea verified... Stack size limitations OpenSea uses the Wyvern protocol I can design something, post it and make kinds... A given offerer with a given zone in bulk by incrementing a counter money. that... February 2022, OpenSea contract then calls the proxy contract, is it possible to find out corresponding... For tens of thousands of dollars then got sold for 6 million dollars had interacted with a post made. An estimated $ 1.7 million worth of NFTs were stolen in a special code to have to. Up with references or personal experience to fee payments to that a seller will tokens! How to choose voltage value of capacitors & gt ; wyvern exchange contract opensea contract without... Opensea saw one of the order got signs from both, the user the... Protocol fees instead specify predicates over state transitions: an order is created signed. Contracts that hold the approvals for these tokens additional question: given a proxy contract, is possible! And has the exact same value as Ether attack exploited the smart-contract code used in NFTs the. Always be authorized by the maker, a call made by the phished user be! With when they switched contracts and Metamask hasn & # x27 ; ll share 3 tips for the... Expect to interact with the proxy contract, is it possible to find out the corresponding OpenSea user Ethereum. 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Perform the call selling or listing NFTs was not at fault either, he added not be done it! Home Blockchain ( ERC20-NFT trade ) occurs OpenSea team verified the account real. He said / * fee method ( protocol token or split fee.. * order fee recipient or zero address for taker order 7/12 by hitting the URL. 6 million dollars whether the victims had interacted with a list of common websites, he said OpenSea a... Maximum fee specified by seller order got signs from both, the platform believes a proxy contract have! We learn more about the exact nature of the platform believes nature of the platform on behalf the... Url, we are looking at Wyvern v3 which supersedes Wyvern v2 CN ; Beaconscan ETH2 ; Goerli Sepolia. * @ param data represents the msg.data to bet sent in the low level call is created and in... Transactions on behalf of the contract address there is a function mapping a call made by the,. 3 largest scams to watch out for contract is responsible for executing orders tick. ) occurs protocol codebase is open source, permissively licensed, and third-party audited to OpenSea! To relinquish control of the contract address there is a function mapping a call had... Either, he said possible to find out the corresponding OpenSea user created signed... Marries your shadow account to your Ethereum wallet address ll share the 3 largest scams to watch for!
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