Loopring Dev Docs
  • Introduction
  • Endpoints
  • SDK
    • SDK Guides
    • Test Mock Data
      • Mock Account
      • Mock provider
      • Mock ERC20 Token Map
      • Mock AMM MAP
      • Mock EIP712 Typed Data
      • Mock Generate eddsaKey
  • Glossary
  • 🗳️Loopring Account
    • Introduction
    • SDK Guides
      • Setup a Loopring Account
      • Unlock Account (Login)
    • API References
      • Get Account info
        • Sample code
      • Update EddsaKey
        • Sample code
      • Get apiKey
        • Sample code
      • Update apiKey
        • Sample code
  • 🎨CounterFactual NFT
    • Introduction
      • Compute NFT Address API
      • When to deploy counterfactual NFT contracts?
    • SDK Guides
      • Deposit NFT
      • Create Collection
      • Mint Counterfactual NFT
      • Transfer NFT
      • Deploy NFT
      • Withdraw NFT
      • Trade NFT
        • Validate NFT Order
      • Meta & IPFS
    • API References
      • NFT Collection
        • Create collection
          • Sample code
        • Edit collection
          • Sample code
        • Delete collection
          • Sample code
        • List owned collections
          • Sample code
        • List user's NFTs under one collection
          • Sample code
        • List user's NFT balances group by Collection ID
          • Sample code
        • List all NFTs of a collection
          • Sample code
        • Get collection by Collection ID
          • Sample code
        • Get collections by contract address
          • Sample code
      • Get NFT Assets
        • Sample code
      • Get NFT Balances
        • Sample code
      • Mint NFT
        • Sample code
      • Transfer NFT
        • Sample code
      • Validate NFT Order
        • Sample code
      • Trade NFT
        • Sample code
      • Deploy NFT TokenAddress
        • Sample code
      • Withdraw NFT
        • Sample code
      • Get NFT Transactions
        • Sample code
      • Get NFT Trade History
        • Sample code
      • Get AvailableBroker
        • Sample code
      • Get NFT Info
        • Sample code
      • Get NFT Data
        • Sample code
      • Get NFT Holders
        • Sample code
  • 🪙ERC20 Tokens
    • Introduction
    • SDK Guides
      • Transfer ERC20
      • Withdraw ERC20
      • Deposit ERC20
      • Order ERC20
    • API References
      • Get Assets
        • Sample code
      • Transfer
        • Sample code
      • Submit Order
        • Sample code
      • Cancel Order
        • Sample code
      • Withdraw
        • Sample code
      • Get Transactions
        • Sample code
      • Get Orders
        • Sample code
      • Get Trade History
        • Sample code
  • 🔬Resources
    • Advanced
      • UpdateAccount with custom seed
      • Pay payee updateAccount fee
      • Common error and solutions
      • Submit erc20 order
    • Common Info
      • Get relayer current time
        • Sample code
      • Get exchange info
        • Sample code
      • Get token info
        • Sample code
      • Get markets info
        • Sample code
    • Error codes
    • Fees
      • GET ERC20 Offchain Fee
        • Sample code
      • GET ERC20 Order Fee
        • Sample code
      • GET NFT Offchain Fee
        • Sample code
      • GET NFT Order Fee
        • Sample code
      • SDK Fees
    • Layer 2 block info
      • Get pending transactions
    • Request signing
      • Special API Request Signatures
      • Off-chain Request Signatures
      • Extra ECDSA authentic in header
    • Signature
      • ECDSA signature
        • ECDSA key generation
        • ECDSA sign
        • ECDSA verify signature
      • EdDSA signature
        • EdDSA key generation
        • EdDSA sign
        • EdDSA verify signature
      • SDK Signature
        • Mock Signature
    • Smart Contracts
    • Storage Id
      • Sample code
    • WebSocket
      • Account Notification
      • Order Notification
      • Orderbook Notification
      • Trade Notification
      • Ticker Notification
      • Candlestick Notification
      • AMM Pool Snapshot Notification
      • Block Generation Notification
    • Loopring Smart Wallet
      • Signature and verification
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On this page
  • Protocol & Exchange
  • Technical Advantages
  • Overall Architecture

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Introduction

NextEndpoints

Last updated 1 year ago

Protocol & Exchange

Loopring is the first scalable DEX protocol built with zkRollup for Ethereum. Using Loopring, people can build high-performance, orderbook-based, decentralized exchanges that do not take custody of users' crypto-assets. Due to the use of zkRollup, a layer-2 scalability solution, Loopring is capable of settling more than 2,000 trades per second on Ethereum 1.0. If you would like to learn more about Loopring's design and technical details, please check out Loopring's official website: https://loopring.org.

Loopring Exchange is the first decentralized trading platform built on top of the Loopring protocol. Loopring Exchange is accessible at Loopring.io. The current version of Loopring Exchange is beta2, which uses Loopring version 3.6. Loopring Exchange's contract address on Ethereum mainnet is: 0x0BABA1Ad5bE3a5C0a66E7ac838a129Bf948f1eA4. The address has a permanent ENS as (exchange2.loopring.eth).

Technical Advantages

Loopring makes sure nobody can misappropriate users' crypto-assets deposited to an exchange. Even under extreme circumstances, such as an exchange's UI stopped functioning, or the exchange's operators are out of reach, users can still claim their rightful assets by providing valid Merkle proofs that are derivable from data on Ethereum.

Loopring does not guarantee the efficiency and fairness of off-chain order-matching. Order-matching is a job for the relayer system, which is a centralized piece of the overall DEX solution. Different exchanges built on the same Loopring protocol can adopt very different relayer solutions and thus provide various quality of services. The Loopring protocol does guarantee that relayers must follow specific rules for trade settlement.

We developed Loopring Exchange's relayer system as a closed source project. As of now, it offers a throughput of 200 trades per second.

Overall Architecture

The overall architecture of Loopring Exchange is shown below:

Some key points you need to know:

  • Loopring Exchange provides an API to handle user off-chain requests, namely order submission and cancellation, and withdrawals. Other user requests, including account registration, password reset, and deposits, must be submitted using Ethereum transactions. These requests are called on-chain requests.

  • Loopring Exchange offers a high-performance trading experience similar to centralized exchanges, which mainly benefits from the batch processing capability of the underlying Loopring protocol. Loopring uses Ethereum as a data availability layer and a ZKP verification layer; Loopring does not perform trading-related computations on Ethereum.

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