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Across Documentation
V3 Developer Docs
V3 Developer Docs
  • 👋Introduction
    • Welcome to Across
    • What is Across?
    • Technical FAQ
    • Migration Guides
      • Migration from V2 to V3
      • Migration to CCTP
        • Migration Guide for Relayers
        • Migration Guide for API Users
      • Migration Guide for Non-EVM and Prefills
        • Breaking Changes for Indexers
        • Breaking Changes for API Users
        • Breaking Changes for Relayers
        • Testnet Environment for Migration
      • Solana Migration Guide
      • BNB Smart Chain Migration Guide
  • 🔗Use Cases
    • Instant Bridging in your Application
      • Bridge Integration Guide
      • Multichain Bridge UI Guide
      • Single Chain Bridge UI Guide
    • Embedded Crosschain Actions
      • Crosschain Actions Integration Guide
        • Using the Generic Multicaller Handler Contract
        • Using a Custom Handler Contract
      • Crosschain Actions UI Guide
    • Settle Crosschain Intents
    • ERC-7683 in Production
  • 🧠Concepts
    • What are Crosschain Intents?
    • Intents Architecture in Across
    • Intent Lifecycle in Across
    • Canonical Asset Maximalism
  • 🛠️Reference
    • API Reference
    • App SDK Reference
    • Contracts
      • Aleph Zero
      • Arbitrum
      • Base
      • Blast
      • Ethereum
      • Linea
      • Ink
      • Lens
      • Lisk
      • Mode
      • Optimism
      • Polygon
      • Redstone
      • Scroll
      • Soneium
      • Unichain
      • World Chain
      • zkSync
      • Zora
    • Selected Contract Functions
    • Supported Chains
    • Fees in the System
    • Actors in the System
    • Security Model and Verification
      • Disputing Root Bundles
      • Validating Root Bundles
    • Tracking Events
  • 🔁Relayers
    • Running a Relayer
    • Relayer Nomination
  • 📚Resources
    • Release Notes
    • Developer Support
    • Bug Bounty
    • Audits
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Products

  • Across Bridge
  • Across+
  • Across Settlement

Socials

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  • Forum

Resources

  • Blog
  • Across Brand Assets
  • Github

Routes

  • Bridge to Unichain
  • Bridge to Arbitrum
  • Bridge to Optimism
  • Bridge to Linea
  • Bridge to Polygon
  • Bridge to Base
  • Bridge to World Chain
  • Bridge to zkSync
On this page
  • Hard Requirements
  • Additional Considerations
  1. Resources

New Chain Requests

Last updated 2 months ago

The following requirements are needed for Across to consider adding support for a new chain. Across intends to support as many chains as possible to provide the best bridging, LP and relaying experience for users. However, each new chain requires significant investment, and these requirements are set to ensure that the benefit to Across Users, LPs and Relayers outweigh the development, security and operational costs of adding a new chain.

These requirements are subject to change as the EVM and Layer 2 ecosystem evolves. Meeting these requirements is the first step in evaluation and does not guarantee support.

Hard Requirements

The below are non-negotiable and are a pre-requisite to any consideration.

  • EVM chain with a canonical token and message bridge to mainnet

  • ≥ 2 independent RPC node providers that can reliably support ~150M RPC requests per month from Across, with preference for at least one Tier 1 provider of Infura, Alchemy, Quicknode

  • Dedicated support channel containing technical members of the new chain with priority support commitment to advise on contract development and debug data quality and/or disagreements between RPC providers

Feel free to and help us explore bringing your blockchain to Across. Alternatively, you can to get started

Additional Considerations

  • Running a relayer to and from new chain

  • Proven market opportunity, based on active users, existing bridging volume, partnership value, key market expansion and other factors

  • Token grant for Across DAO that it will distribute to users for each transfer on Across to new chain (either chain governance token, or protocol token) to attract and incentivize users

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