0x ZRX: A Liquidity Aggregator to Beat?


/// orderHash2 Hash of the second order being filled. /// @param orderHash1 Hash of the first order being filled. /// @dev Emitted by Ownable when ownership is transferred. Address indexed orderSenderAddress, // Orders cancelled must have a `senderAddress` equal to this address. // CancelUpTo event is emitted whenever `cancelOrdersUpTo` is executed succesfully. /// @param orderInfo OrderStatus, orderHash, and amount already filled of order.

Plus, both processes have the additional security provided by smart contracts. Yet, a person who decides to use it to build a decentralized exchange (a “relayer”) is free to impose trading fees. They can be paid with the help of the ZRX coins which function as the governance tokens on the network. Owners of coins have their say in improving and upgrading the protocol in proportion to the number of tokens they hold. 0x provides flexible smart contracts to build decentralized exchanges and trading protocols.

9 By manipulating the gas limit, relayers can affect the outcome of ZeroExTransactions Minor  Won’t Fix

0x is a liquidity protocol that enables the peer-to-peer exchange of assets on the Ethereum blockchain. The protocol establishes a standard set of rules that traders, applications, and market makers can abide by in order to safely & trustlessly trade with each other. At the same time, the on-chain transaction settlements ensure that transactions are executed only if both parties hold up their end of the bargain.


Code maintainers should use their own judgment as to whether to address such issues. This section describes, from a security perspective, the expected behavior of the system under audit. The purpose of this section is to identify specific security properties that were validated by the audit team. Signature checking, as in 0x v2 remains an area of high complexity. If possible, it would be XRP https://www.beaxy.com/ good to reduce the number of signature methods.


/// @param payerAddress The address of the protocol fee payer. /// @return assetProxyAddress The address of the asset proxy. /// @return errorData The revert data thrown by the validator contract. XLM /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`).


However, because the addition can overflow, the bounds check can be bypassed to return an array that points to data out of bounds of the parent array. MixinWrapperFunctions defines a number of functions for market buy/sell orders. These functions take a list of orders and a target asset amount to buy or sell. They fill each order in turn until the target has been reached. The market buy/sell functions gather a list of orders together for the same asset and try to fill them in order until a target amount has been traded.

Coinpaprika.com needs to review the security of your connection before proceeding. ABI for the implementation contract at 0x7b b103bafb51a767b7c4bd43a6163c872, likely using a custom proxy implementation. /// @dev Forwards calls to the appropriate implementation contract. ABI for the implementation contract at 0x61935cbdd02287b511119ddb11aeb42f1593b7ef, likely using a custom proxy implementation. /// @dev Overridden to only log arguments and revert with certain inputs. /// @dev Overridden to log arguments, be deterministic, and revert with certain inputs.

Since each individual’s situation is unique, a qualified professional should always be consulted before making any financial decisions. Investopedia makes no representations or warranties as to the accuracy or timeliness of the information contained herein. As of the date this article was written, the author does not own cryptocurrency. The system also uses relayers, which act as order aggregators and broadcast orders from designated market participants to the marketplace or exchange. 0x Labs, an organization focused on creating new markets in the 0x ecosystem, built the 0x protocol. Full BioSuzanne is a content marketer, writer, and fact-checker.

What Is the 0x Protocol?

/// @param totalRewardsFinalized Amount of rewards that have been paid during finalization. /// @param membersStake Amount of non-operator stake in the pool. /// @param weightedStake Amount of weighted stake in the pool. /// @param makerAddress2 Address of maker of second order being filled. /// @param makerAddress1 Address of maker of first order being filled. /// @param makerAddress Address of maker of order being filled.

  • If the owner calls either of these functions, the resulting delegatecall can pass onlyOwner modifiers even if the transaction signer is not the owner.
  • /// @param orderHash2 Hash of the second order being filled.
  • On February 17, 2021, Bitwise, creator and manager of the world’s largest crypto index fund, included the ZRX token among its portfolio of cryptoassets for their DeFi Crypto Index Fund.
  • /// @dev Calculates the EIP712 typed data hash of an order with a given domain separator.

/// @param takerAssetFillAmount Minimum amount of takerAsset to sell. /// @dev Executes multiple calls of fillOrder until total amount of takerAsset is sold by taker. /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders. /// @param signerAddress Address of the transaction signer. /// @return Array containing ABI encoded return data for each of the underlying Exchange function calls. /// @return ABI encoded return data of the underlying Exchange function call.

The Reports are not an endorsement or indictment of any particular project or team, and the Reports do not guarantee the security of any particular project. This Report does not consider, and should not be interpreted as considering or having any bearing on, the potential economics of a token, token sale or any other product, service or other asset. Cryptographic tokens are emergent technologies and carry with them high levels of technical risk and uncertainty. No third party should rely on the Reports in any way, including for the purpose of making any decisions to buy or sell any token, product, service or other asset. CD owes no duty to any Third-Party by virtue of publishing these Reports.

Is it 0x or ox?

0X or 0-X (zero X) may refer to: 0x, a prefix for hexadecimal numeric constants in computing. C++11, standard for the C++ programming language, previously called C++0x.

This pr0x exchanges any other address from participating in a gas auction. This re-validation step for Wallet, Validator, and EIP1271Wallet signatures is intended to facilitate their use with contracts whose validation depends on some state that may change over time. For example, a validating contract may call into a price feed and determine that some order is invalid if its price deviates from some expected range. In this case, the repeated validation allows 0x users to make orders with custom fill conditions which are evaluated at run-time. This is fixed in 0xProject/0x-monorepo#2297 by allowing transactions to be “over confirmed” without resetting the confirmation time. As long as there are enough honest signers, this prevents a malicious signer from blocking transactions.

  • /// @dev An overridable way to access the deployed zrxVault.
  • /// @param signature Proof that the hash has been signed by signer.
  • /// @dev Computes the reward balance in ETH of the operator of a pool.
  • /// @return isValid true if the signature is valid for the given order and signer.
  • TakerAddress field is the address that will be performing the trade.
  • For example, 0x can deepen the liquidity pool of lending and DEX dApps by aggregating liquidity from both on-chain and off-chain networks.

The ISignatureValidator contract defines an enum SignatureType to represent the different types of signatures recognized within the exchange. The final enum value, NSignatureTypes, is not a valid signature type. Instead, it is used by MixinSignatureValidator to check that the value read from the signature is a valid enum value. However, Solidity now includes its own check for enum casting, and casting a value over the maximum enum size to an enum is no longer possible. LibBytes.readBytesWithLength returns a pointer to a bytes array within an existing bytes array at some given index. The length of the nested array is added to the given index and checked against the parent array to ensure the data in the nested array is within the bounds of the parent.


0x labs operates 0x API, a decentralized exchange liquidity aggregator that taps into Uniswap, Curve, and others in addition to native 0x protocol orders. 0x API powers matcha.xyz, a simple swap application maintained by the 0x Labs team. Developers use 0x to easily incorporate exchange functionality into their applications and create new markets for all tokenized assets and value, including cryptocurrencies, DeFi tokens, and NFTs.

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Posted: Tue, 26 Apr 2022 07:00:00 GMT [source]

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