Connecting to Ostium

Connecting to Ostium

1. Open Ostium app and click on the "connect" button.

1. Choose how you want to connect with Ostium app. You can connect to Ostium in two different ways, depending on your experience and preferences:

• A. Web3 Wallet (Recommended for Web3-Native Users): Connect using your Arbitrum-compatible wallet, such as MetaMask, Rabby, or any other wallet provider you prefer. This option is ideal for users familiar with Web3 concepts and comfortable managing things like gas fees (e.g., using ETH to cover transaction costs). You’ll have full control over your wallet and interactions on-chain.

• B. Email (Recommended for CEX Users or Web3 Beginners): Log in with your email to create a smart account, managed by you but with a more user-friendly experience. This method is perfect for users coming from centralized exchanges like Binance, Coinbase, or Bybit, who may not be familiar with Web3. No need to worry about gas fees — transactions are abstracted away and handled for you. Email verification is required. This login method is powered by Privy.

Feature	Web3 Wallet	Email (Smart Account)
Who it's for	Web3-native users	CEX users or Web3 beginners
Login method	Arbitrum-compatible wallet (MetaMask, Rabby, etc.)	Email + confirmation
Wallet type	User’s own wallet	Smart account (managed by user)
Gas fees	Paid by user in ETH	Covered by the platform
Custody	Fully self-custodial	Managed via Privy, still user-controlled
Best for	Full Web3 control & experience	Simple access without needing to manage keys

A. Web3 wallet

1

Select Wallet

Click on "Continue with a wallet" if your wallet is not there and select it.

2

Connect and confirm

3

Enable 1-click trading (ostium sponsors gas)

Enable 1-Click Trading > Follow module steps and approve transactions

You need some ETH to approve the transaction.

4

(If you want, you can disable 1-click trading)

Profile > Disable 1CT

B. Email

1

Introduce your email

Write your email address > Submit

2

Go to your inbox

Open the [e-mail] and copy code > Go back to ostium.app and paste code

3

Smart account sucessfully created

You can see the account address under the profile. The smart accounts use USDC to pay for withdrawal transactions' gas fee. We decrease the available USDC in 2 units to ensure users can withdraw their assets anytime.

You should ONLY send Arbitrum USDC to your smart account address. If you send any other asset, we may be unable to recover it.