# Arbitrum One

Add your Arbitrum One addresses to rotki to track ARB and token balances, decoded transactions, bridge events, and DeFi activity.

## Features

- Address balances - ARB, ETH, and ERC-20 tokens on Arbitrum One.
- Transaction decoding - swaps, bridges, deposits, withdrawals, and DeFi events become readable.
- DeFi protocols on Arbitrum - GMX, Aave, Curve, Uniswap, Balancer, Compound, Yearn, Gearbox, and more.
- Bridge events - Arbitrum bridge deposits and withdrawals are linked with their L1 counterparts.
- Monerium activity on Arbitrum is decoded as Monerium events rather than bare ERC-20 transfers.

## Setup

1. In rotki, open Blockchain & Accounts → Arbitrum One → Add address.
2. Paste your address (often the same as your Ethereum address).
3. Optional: in Settings → RPC, set your preferred Arbitrum RPC endpoint.

## FAQ

### Do my Arbitrum addresses leave my machine?

No. rotki queries the Arbitrum RPC you configure directly from your computer.

### Can I track the same address on Ethereum and Arbitrum?

Yes. Add it on both chains; rotki tracks balances and history separately and shows a unified portfolio view.

### Are Arbitrum airdrops decoded?

Yes. ARB and other airdrop claims are decoded into income events for tax reporting.