AstralBeam

AstralBeam is a secure, bidirectional bridge between Casper Network and EVM-compatible chains such as Ethereum, Base, and Polygon.

What is AstralBeam?

AstralBeam lets you move tokens between Casper and EVM chains in a few clicks. Lock a token on one side, receive its equivalent on the other - and bridge it back whenever you want.

Security is the core design goal. Every transfer must be independently verified and approved by multiple independent relayers, and the cryptographic proof of your deposit is checked on-chain before any tokens are released. No single party - not even the bridge operators - can move funds alone.

Key Features

Multi-Chain - Bridge tokens between Casper and multiple EVM chains
Independently Verified - Every transfer is cryptographically proven, not just trusted
Multi-Signature Security - A majority of independent relayers must approve every transfer
Non-Custodial - Your tokens stay under your control until you initiate a transfer
Finality Protection - Transfers only proceed once the source chain has finalized them

How It Works

flowchart LR
    subgraph Source[Source Chain]
        Deposit[You lock or burn tokens]
    end

    subgraph Relayers[Independent Relayer Network]
        Verify[Each relayer verifies the transfer cryptographically]
        Approve[Majority approval required]
    end

    subgraph Destination[Destination Chain]
        Receive[You receive tokens]
    end

    Deposit --> Verify --> Approve --> Receive

You start a transfer - Lock (or burn) tokens on the source chain
The network waits for finality - The transfer must be irreversible on the source chain
Relayers verify independently - Each relayer cryptographically confirms your transfer really happened
Majority approval - Only with enough independent approvals are tokens released
You receive tokens - The equivalent token arrives in your destination wallet

Supported Transfers

Direction	You send	You receive
EVM → Casper	ERC-20 token	Equivalent CEP-18 token on Casper
Casper → EVM	Bridged CEP-18 token	Original ERC-20 token back
Casper → EVM	Casper-native token (e.g. CSPR)	Wrapped ERC-20 version
EVM → Casper	Wrapped ERC-20	Original Casper-native token back

Supported Networks

Testnet (Live Now)

Network	Status
Casper Testnet	Active
Ethereum Sepolia	Active
Base Sepolia	Active
Polygon Amoy	Active
Robinhood Chain Testnet	Active
Arbitrum Sepolia	Coming soon
BNB Smart Chain Testnet	Coming soon

Mainnet

Mainnet launch is planned following thorough testnet validation and security audits.

Quick Links

For Users

Getting Started - Connect your wallets and bridge tokens
Supported Tokens - List of bridgeable tokens
Troubleshooting - Common issues and solutions

For Developers

API Reference - REST API documentation
Smart Contracts - Contract interfaces and addresses
Developer Guide - Integration guide

Bridge Interface

Access the public testnet at: https://testnet.astralbeam.io

Getting Help

Issues: GitHub Issues
X: @AstralBeam_io
Telegram: t.me/astralbeam_io

License

This project is licensed under the MIT License.

Introduction