Use ARB in a personal wallet, a cold-wallet setup, or a multi-party MultiSig approval flow, depending on how the assets are owned.
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Support modes
Supported assets
Best fit
ARB
Arbitrum MultiSig Wallet
Hold Arbitrum (ARB) with self-custody, QR-based offline signing, and flexible on-chain MultiSig in Ownbit.
MultiSigCold WalletWallet
ETH on Arbitrum and ERC-20 tokens
shared treasuries, family vaults, and higher-control wallets
About Arbitrum
What is Arbitrum (ARB)?
Arbitrum is an Ethereum layer-2 that uses optimistic rollups to process transactions off-chain while settling on Ethereum, which lowers fees while inheriting Ethereum's security. As an EVM chain it works with Ownbit's open-source on-chain multisig contract, and you can hold ETH and ERC-20 tokens on Arbitrum with cold-wallet protection.
Arbitrum · EVM L2
verified multisig contract
Wallet · Cold wallet · MultiSig
What you can do with it
Arbitrum in Ownbit
Self-custody by design
Your ARB mnemonic and keys are generated and encrypted on your own device — never uploaded for remote custody.
Cold-wallet workflow
Track ARB on a Watch Wallet and sign offline on an air-gapped phone; transactions move as QR codes.
On-chain MultiSig
an open-source on-chain multisig contract requires 2-of-3 or weighted approvals before any ARB moves.
How it works
How Arbitrum works in Ownbit
On Arbitrum, an Ownbit MultiSig is an open-source, on-chain smart contract that enforces M-of-N approval before any transaction executes — with layer-2 fees and Ethereum-level settlement. You keep your own keys and can interact with the contract without relying on Ownbit.
Recovery and compatibility
Arbitrum recovery & compatibility
For standard Arbitrum wallets, recovery completes with your mnemonic or private key in any compatible wallet. For MultiSig, each participant keeps an independent key and can recover from the wallet's on-chain configuration without depending on Ownbit's servers.
FAQ
Arbitrum wallet — frequently asked questions
Does Ownbit support Arbitrum MultiSig?
Yes. Ownbit supports on-chain M-of-N MultiSig for Arbitrum — an open-source on-chain multisig contract. You can set anything from a 2-of-2 personal wallet to weighted enterprise approvals, and the threshold is enforced on-chain rather than by a server.
Which Arbitrum assets can I hold?
Ownbit manages ETH on Arbitrum and ERC-20 tokens on Arbitrum.
Is my Arbitrum self-custodial in Ownbit?
Yes. Your ARB mnemonic and private keys are generated and stored encrypted on your own device. Ownbit never holds them and cannot move, freeze, or access your funds.
Can I use Arbitrum as a cold wallet?
Yes. Pair a Watch Wallet on an online phone with an offline signing phone; unsigned and signed transactions move between them as QR codes, so your keys never touch the internet.
How do I recover my Arbitrum if I lose my phone?
Restore your BIP39 mnemonic in Ownbit or a compatible wallet. For MultiSig, each participant recovers with their own key plus the wallet's public configuration — no Ownbit server required.
Download
Ready to manage Arbitrum in Ownbit?
Download the app on iOS, Google Play, or via direct APK — self-custody from the first screen.