Welcome
Introduction to X Layer

Introduction to X Layer#

Welcome to the X Layer documentation. X Layer is a decentralized Ethereum Layer 2 network that offers a secure and user-friendly blockchain experience to all users, using advanced cryptographic zero-knowledge proofs to provide validity and near-instant finality to off-chain transaction computations. The concept of zkEVM can be broken down into two parts:

  • zk (zero-knowledge): Zero-knowledge proof technology can prove the validity of a batch of transactions through succinct proofs, ensuring computational trustworthiness and enabling scalability.
  • EVM (Ethereum Virtual Machine): This is the smart contract execution environment within the Ethereum ecosystem. It empowers Ethereum to execute smart contracts and function as a worldwide computing network, distinguishing it from Bitcoin, which primarily operates as a digital currency and is often likened to a basic calculator. Additionally, EVM gives rise to the different types of zkEVMs, each implementing zero-knowledge proof technology to enhance Ethereum’s capabilities.

Benefits of X Layer#

X Layer is built on zkEVM validium, which offers scalability and flexibility in data availability (DA).

  • Lower fees: X Layer does not consume expensive gas (i.e., DA to store transaction data off-chain).
  • ZKP-powered scalability: X Layer is not bounded by the amount of transaction data that can be published to Ethereum with ZK-validity proofs.
  • Ethereum security: X Layer natively inherits the security of Ethereum, securing user funds from malicious operators.
  • Unified liquidity: X Layer ensures fluid asset transfers across different CDK-developed chains within Polygon 2.0's L2 ecosystem, building a vibrant, efficient, and interconnected digital economy.
  • Near-instant finality: X Layer utilizes cryptographic security to ensure the integrity of transactions, achieving near-instant finality and robust security.
  • Powered by OKX: X Layer provides seamless OKX product integrations, an all-in-one Web3 gateway, and access to 50M users in the OKX ecosystem.
  • Portal to Web3: Enter the world of Web3 via OKX Wallet, built with compact infrastructure modules to create innovative DApps.

OKB token#

OKB is the native token of X Layer, as well as the cryptocurrency that powers the OKX ecosystem.

You can trade OKB like any other cryptocurrency, and can also use OKB in a wide range of applications and use cases. OKB is an ERC-20 token on the Ethereum network and can be bridged to X Layer at a 1:1 ratio.

How to buy OKB token#

In order to interact with the X Layer network, you will need to have some OKB tokens in your wallet to pay for fees on X Layer.

  • OKB testnet token can be received through testnet faucet for usage on testnet
  • Buy OKB from OKX, and transfer via X Layer to your wallets (available after mainnet launch)