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Onekey extension wallet setup and feature guide
Onekey extension wallet setup and feature guide
Upon first click, the interface will prompt you to create a fresh vault or recover an existing one using a 12 or 24-word mnemonic phrase. Write this recovery seed on paper–store it offline in a fireproof safe. Never type it into a digital file, screenshot it, or paste it into any website. The tool uses BIP39 and BIP44 standards for key derivation, ensuring compatibility with other Bitcoin and Ethereum protocol clients.
The default network is Ethereum Mainnet. To save on gas fees, switch to a Layer 2 solution like Arbitrum or Optimism via the network selector dropdown. You can also manually add a custom RPC for networks like BNB Smart Chain or Polygon by entering the chain ID, RPC URL, and token symbol. The non-custodial design means your private keys never leave your local device; every transaction sign occurs right inside the browser Sandbox.
For hardware security, pair a physical signing device (such as a Trezor or Ledger) via USB. This moves the private key off the computer entirely. To do this, connect the hardware, select “Connect Hardware Device” in the settings, and confirm the pairing on the device’s screen. This method prevents remote exploits even if your operating system is compromised.
OneKey Extension Wallet Setup and Feature Guide
Immediately after installing the browser add-on, open its main panel and select "Create a new vault". The system will present you with a set of 12 recovery phrases. Write these down on paper only–never type them into a computer, take a screenshot, or store them in a cloud service. Confirm the phrase by selecting the correct words in order on the next screen. This vault uses a BIP-39 mnemonic standard, which provides full control over your private keys, meaning the add-on developer cannot access your assets even if their servers are compromised.
Hardware vault pairing: This plugin supports direct Bluetooth and USB connection to a OneKey hardware device. During vault creation, choose "Connect hardware" and follow the on-screen pairing code. Once linked, all transaction approvals must be physically confirmed on the device, isolating your private keys from the internet.
Multi-chain portfolio view: After vault activation, the interface displays balances across Bitcoin, Ethereum, Solana, and several other networks in a single column list. You can toggle testnet visibility in the settings (top-right gear icon) under "Developer Mode". This is useful for experimenting with dummy tokens without risking mainnet funds.
Custom network addition: For less common blockchains, open the Network dropdown at the top of the main screen, scroll to the bottom, and click "Add Custom". You will need to paste the chain’s RPC URL and its native currency symbol accurately. For example, for a BNB Smart Chain testnet, use the RPC: https://data-seed-prebsc-1-s1.binance.org:8545/ with symbol BNB and chain ID 97.
To manage permissions, click the three-dot menu next to the connected dApp in the main interface and select "Revoke". This immediately terminates the site’s access to your vault and prevents it from initiating any further transactions. The plugin logs every permission grant and revocation in its activity panel, which you can export as a CSV file for auditing purposes. This granular control allows you to isolate smart contract approval risks specifically, rather than resetting all connections blindly. For anonymous browsing, enable the "Tor" proxy toggle within the add-on’s privacy settings, which routes your transaction broadcasting through multiple network layers, though this will increase confirmation times by approximately 2–4 minutes per operation.
Downloading the OneKey Extension from the Official Chrome Web Store
Navigate directly to the Chrome Web Store page for the "OneKey Wallet extension tutorial" cryptographic manager using the URL chrome.google.com/webstore/detail/onekey/...–searching for it manually risks landing on a phishing clone, so bookmark the official listing before proceeding. Verify the publisher identity: "OneKey" must be listed as the developer, with a verified tick and a history of over 500,000 users. Check the "Permissions" tab before clicking "Add to Chrome"; the requested access (e.g., storage, clipboardWrite) should match its advertised functions, not extras like arbitrary website data.
Click "Add to Chrome" and confirm the pop-up prompt within 10 seconds to trigger the download. The file size is approximately 4.2 MB–if the download exceeds 50 MB or finishes in under one second, cancel immediately, as the legitimate package does not vary beyond ±0.1 MB across builds. Once the toolbar icon appears (a stylized "O" in a hexagon), right-click it and select "Manage toolbar" to pin it for direct access, bypassing Chrome’s overflow menu during your initial session.
After installation, open the extension by clicking the icon, then reject the automatic welcome wizard by closing the tab. Instead, hover over the pop-up and locate the gear icon in the top-right corner to access the "Settings" page directly. There, toggle "Developer mode" off–this prevents future updates from minor or untrusted channels automatically injecting code into the browser runtime. Do not proceed until the version number in the bottom-left of the pop-up matches the latest stable release (currently v3.12.4 as of March 2025), which you can cross-reference on the official GitHub repository.
Run a sandbox test before importing any real assets: open a new incognito window, re-enable the extension (Chrome prompts you for incognito access under "Extensions" > "Details"), and generate a dummy account. Send a transaction of 0.0001 ETH on the Goerli testnet to confirm the signing interface loads without latency and that the gas estimator returns values within 5% of chain averages. Complete this verification in under 2 minutes; if the interface stalls or displays an "Invalid contract address" error, uninstall via Chrome’s extension manager and re-download from the official store.
Finally, disable automatic updates for the add-on by navigating to chrome://extensions, enabling "Developer mode," and clicking "Update" manually only after checking the changelog on the developer’s site. This protects against a rogue update that might bypass permissions–OneKey’s team published a security advisory in Q4 2024 warning users about a dependency hijack during an unvetted rollout. Keep the local copy of the CRX file (located in %LOCALAPPDATA%\Google\Chrome\User Data\Default\Extensions\ on Windows) in a password-protected archive as a backup restore point.
Creating a New Wallet and Safely Backing Up Your 12-Word Seed Phrase
Open your browser and click the icon for your digital asset manager. Select "Create new profile" and confirm you have a secure location to record sensitive data. The system will immediately generate a sequence of twelve distinct words. Write these twelve words down exclusively on paper using a pen; do not copy them into any digital file, screenshot, or cloud service. Verify every word matches the displayed order exactly, as even a single misspelled term renders the phrase useless.
Store the paper copy in a fireproof safe or a bank deposit box. Avoid hiding it inside a book, under a mattress, or in a drawer due to common theft patterns. For higher security, split the word list into two separate pieces and store them in different, equally secure locations. Never type the phrase into any website, app, or communication tool, including email or messaging services. Hackers actively scan for such data.
Test your backup immediately. After noting the phrase, close the application, reopen it, and select "Recover existing profile." Input your written words into the recovery field. If the system restores your control correctly, the copy is valid. If the recovery fails, destroy the faulty copy and repeat the generation process from scratch. This verification step takes three minutes but prevents catastrophic asset loss.
Consider using a steel stamping kit to emboss the words onto a metal plate for protection against fire, flood, and corrosion. This method costs approximately twenty to forty dollars but ensures the phrase survives decades of physical threats. Never rely on memory alone; the brain is unreliable under stress or after long intervals. Your written or stamped seed is the singular key to regaining access if your device is lost, damaged, or stolen.
Importing an Existing Wallet Using a Seed Phrase or Private Key
Use the seed phrase restoration path only when you lack a direct JSON or private key export. A 12 or 24-word BIP39 mnemonic is the most comprehensive recovery method, covering all associated accounts and token balances across multiple blockchains. Enter the full phrase with single spaces between each word, in the correct order–any typographical error or misplacement renders the import invalid. If you are restoring a hardware device's seed, ensure you disable any passphrase protection within the device's settings before input, or the derived addresses will not match.
Private key import is strictly for single-account recovery, typically used for a specific address that was generated outside of a hierarchical deterministic (HD) structure. Common formats include hex (64 characters for Ethereum-based networks) or WIF (Wallet Import Format, common for Bitcoin). Never paste a private key into a web browser’s address bar or a text editor; use the dedicated field within the software, which should be clearly labeled for a raw private key string. After import, immediately verify the receiving address by sending a small test transaction–0.001 ETH or equivalent–before moving larger sums.
The following table outlines the critical characteristics and risks associated with each import method:
Import Type
Accounts Recovered
Key Format Required
Primary Risk
Seed Phrase (BIP39)
Entire hierarchy (all derived addresses)
12 or 24 words, lowercase, space-separated
Phrase captured via clipboard malware or screen recording
Private Key (Raw Hex)
Single address only
64-character hex string for EVM chains
Permanent loss of all other linked accounts
Private Key (WIF)
Single address (Bitcoin/Litecoin)
Base58 string starting with '5', 'K', or 'L'
Irreversible if imported into wrong network type
Disconnect from the internet before initiating any restoration process. Write down the seed phrase on a fireproof metal plate, not a computer file. After a successful import, delete the browser’s browsing history and cached data, then generate a fresh set of addresses for future transactions to avoid linking old public keys to the recovered account.
Q&A:
I’m trying to set up the OneKey extension, but I already have a wallet from another app. Can I import my existing seed phrase directly into OneKey, or do I have to start from zero with a new wallet?
Yes, you can import an existing seed phrase. When you first open the OneKey extension, you’ll see two main options: "Create a Wallet" and "Import Wallet." If you choose the import path, the app asks for your 12 or 24-word recovery phrase. OneKey supports standard BIP39 phrases, so phrases from MetaMask, Trust Wallet, or other popular wallets usually work fine. Just make sure you enter the words in the correct order. Once you paste or type them in, OneKey will derive the same addresses you had before. A small warning: if your old wallet used a custom derivation path (like for certain multi-coin setups), you might need to manually select that path under the "Advanced" settings during import. After importing, all your balances and transaction history should show up immediately on the main screen. You can then add multiple accounts from that same seed by clicking the account icon and selecting "Create Account." This is much faster than sending funds from one wallet to another.
Does the OneKey extension support Solana and other non-EVM chains, or is it strictly for Ethereum and EVM-compatible networks?
The OneKey extension supports both EVM chains (Ethereum, Arbitrum, Optimism, BNB Chain, Polygon) and several non-EVM chains, most notably Solana. For Solana, the integration is quite direct: you can add a Solana account from the same seed phrase that you use for your Ethereum accounts. The extension manages different key types internally, so you don’t need to switch between different browser extensions. To start using Solana, click the network switcher on the top-left of the extension, scroll down to "Solana," and activate it. A new address will be generated under your main account. The same applies to Bitcoin, Litecoin, and a handful of other UTXO-based coins. However, keep in mind that some features—like staking or interacting with complex Solana smart contracts—are handled through the app’s built-in browser. For Bitcoin, you can send and receive BTC, but advanced features like Runes or Ordinals management might require you to connect to a separate marketplace. Overall, the extension acts as a unified interface for multiple blockchains, but the depth of support varies by chain.