Cryptnox supports YFI as an ERC-20 token on Ethereum after you add it once with Add a Network or Add a Token. YFI is not pre-programmed on the cards, so use contract 0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e and receive to an 0x-prefixed 20-byte EVM address. The Ethereum key that controls that YFI address is generated inside the secure element and never leaves it. Buy the Cryptnox Crypto Hardware Wallet – Dual-Card Set.
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Yearn Finance (YFI) is held with Cryptnox as an Ethereum ERC-20 token. The cards do not arrive with a YFI entry already configured, so the setup step is to add YFI once in the Cryptnox app through Add a Network or Add a Token. After that, YFI is managed through the Ethereum address controlled by your Cryptnox card.
The token contract to add is 0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e. The same YFI contract appears on Etherscan’s YFI token page, and Yearn’s public developer constants list the Ethereum YFI address in Yearn developer documentation.
If you manage more than YFI, check the Cryptnox coin and blockchain support page before sending assets to a card-backed address. YFI should be treated as the Ethereum ERC-20 token above, not as a separate preloaded network profile.
A YFI balance is associated with an Ethereum 0x address. When you receive YFI, you receive the ERC-20 token to that Ethereum address; when you move YFI, the transaction uses Ethereum and references the YFI token contract. The Cryptnox card therefore protects the Ethereum private key that controls the address where the YFI balance sits.
For a buyer comparing a yearn finance wallet with a software-only setup, the important difference is where the Ethereum key is created and used. In the Cryptnox Dual-Card Set, the private key for the YFI-holding Ethereum address is generated inside the secure element and never leaves it. The app gives the interface for adding YFI and preparing transactions, while the card performs the signing operation for the Ethereum address.
YFI is not added as a new Cryptnox-only chain. It is added as a token entry on Ethereum. That makes the contract address and 0x address format essential during setup, because sending an ERC-20 token to the wrong type of address is not the same as adding a display label in an app.
The practical route is simple: initialise the Cryptnox cards, add Ethereum if needed, add the YFI ERC-20 token with the contract address, then receive YFI to the Ethereum address shown for that wallet.
The Cryptnox Crypto Hardware Wallet – Dual-Card Set uses a secure element with an EAL6+-certified chip. For YFI, that protects the Ethereum private key that controls the 0x address holding the ERC-20 token. The key is created inside the secure element and stays there, so YFI transactions are signed without exporting the private key from the card.
This matters because YFI does not use a separate address family. The same Ethereum account format used for the token balance is the format protected by the card. If your YFI is received to an 0x-prefixed EVM address controlled by Cryptnox, the relevant private key remains inside the card’s secure environment.
The result is a hardware-wallet workflow for the Ethereum account that holds YFI, rather than a token profile that depends only on an app display.
The Dual-Card Set ships uninitialised. During setup, the seed for the Ethereum wallet that can hold YFI is generated inside both secure elements, so the second card becomes the backup for the same YFI-capable Ethereum account. The default flow does not require writing down a recovery phrase.
For YFI, the backup is not a separate YFI account and it is not a second token contract. It is a second physical card initialised for the same Ethereum wallet, using its own secure element. If the active card is unavailable, the backup card protects access to the same 0x address that can hold YFI.
The standard route is to create the wallet inside the two cards first, then add Ethereum and the YFI token in the app. Importing an existing BIP39 recovery phrase is an advanced option for users who intentionally want to bring in a wallet that already exists. It is not the default Dual-Card Set setup.
This backup model fits YFI because the token’s control point is the Ethereum key. Once both cards are initialised for the same wallet, the backup protects the same Ethereum address where YFI can be received and sent.
The Cryptnox card is a contact and NFC smart card. For YFI management, you can tap the card to a phone or insert it into a reader, then use the free Cryptnox app on iOS or Android to work with the Ethereum wallet and the YFI token entry.
Unlocking uses the phone’s local face or fingerprint unlock through the Cryptnox app. The card itself has no biometric sensor. That division is useful for YFI: the phone provides the app interface for the Ethereum token entry, while the card protects the private key used to sign for the 0x address.
For app and card setup help before you add YFI, use the Cryptnox hardware wallet tutorials. The tutorial hub is helpful for the card workflow, while the YFI-specific details remain Ethereum, ERC-20, the contract address, and the 0x address format.
Cryptnox connects to Web3 through WalletConnect and works with MetaMask. For YFI, this means the Ethereum address protected by the card can be used in Web3 workflows that involve the YFI ERC-20 token, while the private key remains in the secure element.
When you use WalletConnect, the Cryptnox app provides the connection route and the card remains the signing device for the Ethereum account. When you work with MetaMask, Cryptnox support lets the card-backed Ethereum address remain the address that controls the YFI token balance.
A YFI token wallet is more than a balance display. The controlling point is the Ethereum private key behind the 0x address. Cryptnox keeps that key inside the card’s secure element and uses the app as the interface for YFI setup and transaction handling.
YFI is one Ethereum ERC-20 token in a broader Cryptnox setup. If your portfolio includes assets beyond Ethereum tokens, start with the Cryptnox crypto hardware wallet hub and confirm each asset’s chain before sending funds. For YFI, the chain remains Ethereum and the receiving address remains an 0x-prefixed EVM address.
Other assets may use different routes. The same Cryptnox card product is described for chain-specific use cases such as a hardware wallet for Tron and a hardware wallet for Polygon, but those pages do not change the YFI setup route. YFI should still be added as the Ethereum ERC-20 token at 0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e.
If you also compare non-Ethereum examples, the hardware wallet for Ronin and hardware wallet for Bitcoin pages show why each asset page should be treated by chain and address format. For YFI, do not treat the token as a separate pre-programmed card asset; add it once as an ERC-20 token on Ethereum.
Choose the Cryptnox Crypto Hardware Wallet – Dual-Card Set if you want the YFI-holding Ethereum key created inside secure elements across two cards. The cards are Swiss-engineered and use a contact and NFC smart card form factor, so you can tap to a phone or insert into a reader during wallet use.
After purchase, the YFI-specific path is to initialise both cards, add Ethereum if needed, and add the YFI ERC-20 token with contract 0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e. The second card is the backup for the same Ethereum account, and the free Cryptnox app on iOS and Android provides the interface for managing the token entry.
That combination gives a clear route for a yearn finance wallet: YFI is added manually as an Ethereum token, the receiving address begins with 0x, and the private key controlling that address is generated inside the secure element and never leaves it.
No. YFI is not pre-programmed on the cards. Add it once in the Cryptnox app through Add a Network or Add a Token. Use Ethereum as the chain, ERC-20 as the standard, and contract address 0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e.
Use an Ethereum address. In this Cryptnox setup, YFI is held as an ERC-20 token on Ethereum, so the receiving address is an 0x-prefixed 20-byte EVM address. The contract identifies the YFI token; your receiving address is your own Ethereum address.
The Dual-Card Set ships uninitialised. During setup, the seed for the Ethereum wallet that can hold YFI is generated inside both secure elements. The second card is therefore the backup for the same Ethereum account and the same 0x address that can hold YFI.
The private key for the Ethereum address that can hold YFI is generated inside the secure element and never leaves it. YFI remains an ERC-20 token at the Ethereum contract address, while the card protects the Ethereum key that controls your 0x address.
Yes. The free Cryptnox app connects to Web3 through WalletConnect and works with MetaMask. For YFI, the relevant account is still the Ethereum 0x address controlled by the card, and YFI is added as the ERC-20 token at its Ethereum contract address.
No. Unlocking uses the phone’s local face or fingerprint unlock through the Cryptnox app. The card itself has no biometric sensor. For YFI, the card’s role is to protect and use the Ethereum private key for the 0x address that holds the token.
Importing an existing BIP39 recovery phrase is available as an advanced option. The default Dual-Card Set flow is to initialise both cards so the seed is generated inside both secure elements, then add Ethereum and the YFI ERC-20 token in the app.
No, and on this network that is not a limitation. The Cryptnox wallet uses one address per chain. HD address rotation comes from Bitcoin’s UTXO model and the BIP32/BIP44/BIP49/BIP84 derivation scheme; on account-model networks each account is a single fixed address by design, so the question does not apply in the same way. Cryptnox’s single-address-per-chain behaviour matches how these networks work.
At the cryptography layer the card derives keys along BIP32 and SLIP-10 paths, one path per supported chain, though that is not exposed in the app as multi-address management.
Yes. Cryptnox ships worldwide from the official CRYPTNOX store. Orders to Switzerland, the European Union and the United States are dispatched from stock already held in each of those regions, so the parcel does not cross a customs border into your country and there are no import duties to pay. Orders to other destinations are shipped internationally, and any import duties or local taxes are set by the destination country and are the recipient’s responsibility. Current shipping rates are shown at checkout.