This article explains how to use your BitBox02 to interact with Ethereum Virtual Machine (EVM) compatible blockchains other than Ethereum, such as Polygon, Arbitrum, or Avalanche. While you cannot manage these chains directly in the BitBoxApp, you can do so securely by connecting your BitBox02 to a compatible third-party wallet.

Understanding EVM compatibility

The Ethereum Virtual Machine (EVM) is the environment where all Ethereum smart contracts and applications run. Many other blockchains have adopted this standard, making them "EVM-compatible".

A key feature of this system is that your single Ethereum address, secured by your BitBox02, also works as your address on all other EVM chains. For example:

• Your Ethereum address is also your Polygon address.
• Your Ethereum address is also your Arbitrum address.
• Your Ethereum address is also your Avalanche C-Chain address.

Your private keys, which give you ownership of that address, remain securely stored on your BitBox02 at all times.

Using a third-party wallet

To view your balances and create transactions on these other networks, you must use a compatible third-party wallet that supports them. Popular and trusted options include Rabby and MyEtherWallet.

The process involves connecting your BitBox02 to the third-party wallet, which then acts as a secure "window" to the blockchain. Your private keys are never exposed to your computer or the web browser.

The security model remains the same

Even when using an external wallet, the core security of your BitBox02 is unchanged:

• Your keys never leave the device. The third-party wallet only sends transaction requests to your BitBox02.
• All transactions must be verified on your BitBox02. You will always have to physically check and confirm the transaction details (address, amount, network) on the trusted screen of your BitBox02.

Frequently Asked Questions (FAQ)

Why can't I see my Polygon/Arbitrum tokens in the BitBoxApp?

The BitBoxApp is designed for simplicity and security, focusing on native support for a curated set of the most established assets. To avoid overwhelming complexity, interaction with the wider ecosystem of EVM chains is delegated to specialized third-party wallets.

How do I pay for gas fees on other chains?

Each EVM chain has its own native currency for paying transaction fees (gas). For example:

• On Polygon, you need MATIC.
• On Arbitrum, you need Arbitrum ETH (AETH).
• On Avalanche, you need AVAX.

You must send a small amount of the chain's native asset to your address on that network before you can send other tokens or interact with applications.

Is it safe to connect my BitBox02 to these wallets?

Yes. The connection process is designed with security in mind. The third-party wallet never gets access to your private keys. As long as you follow the golden rule of always verifying transaction details on your BitBox02's screen before confirming, your funds remain secure.