Use OP 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
OP
Optimism MultiSig Wallet
Hold Optimism (OP) with self-custody, QR-based offline signing, and flexible on-chain MultiSig in Ownbit.
MultiSigCold WalletWallet
ETH on Optimism and ERC-20 tokens
shared treasuries, family vaults, and higher-control wallets
About Optimism
What is Optimism (OP)?
Optimism is an Ethereum layer-2 built on optimistic-rollup technology, offering low fees while inheriting Ethereum's settlement security. Ownbit supports Optimism with the same open-source on-chain MultiSig contract used on Ethereum, and manages ETH and ERC-20 tokens on Optimism in self-custody with cold-wallet signing.
Optimism · EVM L2
verified multisig contract
Wallet · Cold wallet · MultiSig
What you can do with it
Optimism in Ownbit
Self-custody by design
Your OP mnemonic and keys are generated and encrypted on your own device — never uploaded for remote custody.
Cold-wallet workflow
Track OP 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 OP moves.
How it works
How Optimism works in Ownbit
On Optimism, 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
Optimism recovery & compatibility
For standard Optimism 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
Optimism wallet — frequently asked questions
Does Ownbit support Optimism MultiSig?
Yes. Ownbit supports on-chain M-of-N MultiSig for Optimism — 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 Optimism assets can I hold?
Ownbit manages ETH on Optimism and ERC-20 tokens on Optimism.
Is my Optimism self-custodial in Ownbit?
Yes. Your OP 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 Optimism 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 Optimism 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 Optimism in Ownbit?
Download the app on iOS, Google Play, or via direct APK — self-custody from the first screen.