zkSync Era Hardware Wallet

Does the Cryptnox wallet support zkSync Era?

Yes. zkSync Era Mainnet is pre-programmed in the Cryptnox app, so the Cryptnox Crypto Hardware Wallet – Dual-Card Set can be used with zkSync Era without manually adding the network. zkSync Era is an Ethereum Layer 2 EVM network that uses 0x-prefixed 20-byte addresses. ETH is the native gas token on zkSync Era, and the ZK governance token is handled as an ERC-20 token on zkSync Era.

zkSync Era support in the Cryptnox app

zkSync Era Mainnet is already available in the Cryptnox app. For a buyer choosing a hardware wallet for zkSync Era, that means the network route is direct: initialise the Cryptnox Crypto Hardware Wallet – Dual-Card Set, open the app on iOS or Android, and use the pre-programmed zkSync Era Mainnet rather than creating a custom EVM entry first.

zkSync Era is an Ethereum Layer 2 EVM network. The account format is the familiar 0x-prefixed 20-byte EVM address, but assets still belong to the selected chain. ETH held for zkSync Era gas is used on zkSync Era, and ERC-20 tokens deployed on zkSync Era are managed on that network. The ZK governance token is listed as an ERC-20 on zkSync Era, so it should be treated as a token on that chain rather than as the native gas asset.

What is already set up for zkSync Era

• Network: zkSync Era Mainnet is pre-programmed in the Cryptnox app.
• Chain type: zkSync Era is an Ethereum Layer 2 EVM network.
• Address format: accounts use a 0x-prefixed 20-byte EVM address.
• Gas asset: ETH is the native gas token on zkSync Era.
• ZK token: ZK is listed as an ERC-20 on zkSync Era.

Before buying, you can compare zkSync Era with other assets and networks on the Cryptnox coin and blockchain support page. For the product itself, the relevant item is the Cryptnox Crypto Hardware Wallet – Dual-Card Set.

How zkSync Era differs from a manually added EVM network

The Cryptnox app can add EVM networks through Add a Network, but zkSync Era Mainnet does not require that step because it is pre-programmed. That matters if you want a zkSync wallet and do not want to begin by entering network details. Select zkSync Era Mainnet in the app, then manage ETH and ERC-20 tokens in the context of that chain.

The broader EVM model still matters for buyers who use more than one chain. Any EVM network can be added through Add a Network. Once an EVM network has been added, its native coin and any ERC-20 deployed on that chain can be managed. ERC-20 tokens can also be added manually through Add a Token. For zkSync Era, the pre-programmed route simply removes the custom-network step.

Pre-programmed versus added by the user

• zkSync Era Mainnet: already present in the Cryptnox app.
• Other EVM networks: can be added through Add a Network.
• Native coins: managed on their own EVM chains after the chain is available.
• ERC-20 tokens: added through Add a Token when deployed on the selected chain.

This distinction is important when moving between networks that share 0x-style addresses. A 0x address can appear across EVM chains, but the selected chain controls which assets and transaction rules apply. On zkSync Era, ETH is the gas token and ZK is an ERC-20 token. On another EVM network, the native asset and token list may differ.

ETH, ZK, and ERC-20 handling on zkSync Era

On zkSync Era, ETH is the native gas token. A buyer planning to use zkSync Era through Cryptnox should keep that distinction clear: ETH pays transaction costs on zkSync Era, while tokens deployed on zkSync Era are managed as ERC-20 assets on that same chain. The ZK governance token follows that second path because it is listed as an ERC-20 on zkSync Era.

The Cryptnox app follows the EVM pattern for tokens. ERC-20 tokens can be added manually through Add a Token, and tokens are handled in relation to the network selected in the app. When the selected network is zkSync Era Mainnet, the 0x address shown is the zkSync Era account address for that chain context. The card signs for that account without exporting the key that controls it.

Asset roles on zkSync Era

• ETH: native gas token used for zkSync Era transaction costs.
• ZK: governance token listed as an ERC-20 on zkSync Era.
• Other ERC-20 tokens: added manually when deployed on zkSync Era.
• Account address: 0x-prefixed 20-byte EVM address.

If you also hold assets on other EVM networks, compare the chain context before signing. Cryptnox publishes separate pages for a Polygon hardware wallet and a Ronin hardware wallet, and those comparisons are useful because each chain has its own network selection even when the address style is familiar.

Key custody for a zkSync Era 0x account

The key for the zkSync Era 0x account is created inside the card’s secure element and is not exported from it. For a zkSync Era buyer, the practical result is that the same key which controls ETH for gas and ERC-20 tokens such as ZK remains inside the card during normal wallet creation and signing.

The card uses an EAL6+-certified chip. That certification belongs to the chip platform. In the Dual-Card Set, the chip is part of a contact and NFC smart-card design that works with the Cryptnox app for account viewing, transaction preparation, and signing approval. The phone provides the app workflow; the card holds and uses the key for the zkSync Era address.

The app’s unlock step can use the biometric check already available on the phone through the Cryptnox app. The card does not have a sensor for that check. This keeps the zkSync Era workflow clear: the phone helps you open and operate the app, while the card remains the signing device for the 0x account.

Where the zkSync Era key is used

When a zkSync Era transaction is prepared, the network selected in the app, the ETH gas requirement, and the ERC-20 token context should all match the intended action. The card then signs for the zkSync Era account while the private key stays within the secure element. The signing key is not turned into a phone-stored key during that process.

Dual-card backup for zkSync Era holdings

The Dual-Card Set ships uninitialised. During setup, the seed is created inside both cards’ secure elements, so the second card is the backup for the same zkSync Era account from the start. For a buyer holding ETH for zkSync Era gas or ERC-20 tokens such as ZK, that backup model is central to how access is preserved.

This default setup does not ask you to write down a recovery phrase. Instead, the backup is the second card created during the original initialisation. Importing an existing BIP39 recovery phrase is available as an advanced option, but it is not the normal path for setting up the Dual-Card Set as a new zkSync Era hardware wallet.

The backup matters because zkSync Era uses the EVM account model: the 0x address is controlled by the private key. If you cannot access the signing key, you cannot practically use ETH or ERC-20 tokens held by that address on zkSync Era. Creating both cards during setup gives you two cards tied to the same seed without moving the seed out of the secure elements during the default creation flow.

The Cryptnox startup guide is the setup resource to use before sending value to a new zkSync Era address. Initialise the cards first, confirm that the zkSync Era account is available in the app, and then use the account address for zkSync Era assets.

Tap-to-phone and reader use for zkSync Era

The Cryptnox card is a contact and NFC smart card. For zkSync Era use on mobile, you can tap the card to a phone running the Cryptnox app. When a contact workflow is preferred, the same card can be inserted into a reader. That dual-interface format is relevant for a zkSync Era account because it separates the card that signs from the phone that displays and initiates the action.

In a typical zkSync Era flow, the free Cryptnox app on iOS or Android shows the account and selected network. The app can rely on the phone’s own biometric check for unlocking the app flow, and the card is then used for signing. The card itself has no biometric sensor. For zkSync Era, the action being signed should show the intended 0x address, the zkSync Era network, and the asset type: ETH as gas or an ERC-20 token such as ZK.

Connection choices for the card

• Tap to a phone: use NFC with the Cryptnox app on iOS or Android.
• Insert into a reader: use the contact interface when that workflow is preferred.
• Store the second card separately: keep the backup card available for the same zkSync Era account.

For broader buying comparisons, the Cryptnox crypto hardware wallet collection groups hardware wallet options by chain and use case, including networks that differ from zkSync Era’s EVM model.

Using zkSync Era with WalletConnect and MetaMask

For zkSync Era Web3 activity, the Cryptnox app connects through WalletConnect and works with MetaMask. The point for a zkSync Era buyer is that the app can participate in Web3 connection flows while the card continues to control signing for the 0x account. The chain still needs to be zkSync Era Mainnet when the intended action involves zkSync Era ETH or ERC-20 tokens.

WalletConnect and MetaMask do not change the asset rules on zkSync Era. ETH remains the native gas token. ZK remains an ERC-20 token on zkSync Era. Other ERC-20 tokens are managed when deployed on the selected EVM chain and added through the token workflow. The card signs for the account whose address is a 0x-prefixed 20-byte EVM address.

Before approving a zkSync Era action, review the network and asset context in the app. This is especially important if you also use non-EVM or differently structured networks. For comparison, Cryptnox has dedicated pages for a TRON hardware wallet and a Bitcoin hardware wallet, where the account model is not the same as zkSync Era’s EVM address format.

Buy the zkSync Era-ready Dual-Card Set

If you want a card-based hardware wallet for zkSync Era Mainnet, buy the Cryptnox Crypto Hardware Wallet – Dual-Card Set, initialise both cards, and use the pre-programmed zkSync Era Mainnet in the Cryptnox app before moving ETH or ERC-20 tokens to the account.

Frequently asked questions

Is zkSync Era already available in the Cryptnox app?

Yes. zkSync Era Mainnet is pre-programmed in the Cryptnox app, so you do not need to add the network manually. It is available as an Ethereum Layer 2 EVM network with a 0x-prefixed 20-byte address format.

What is the native gas token on zkSync Era?

ETH is the native gas token on zkSync Era. When you use a Cryptnox hardware wallet account on zkSync Era, ETH is the asset used for transaction costs on that network. ZK is different because it is listed as an ERC-20 token on zkSync Era.

Can the Cryptnox wallet manage ZK on zkSync Era?

Yes. The ZK governance token is listed as an ERC-20 on zkSync Era. In the Cryptnox app, ERC-20 tokens can be added manually through Add a Token when the token is deployed on the selected EVM chain.

What address format does zkSync Era use?

zkSync Era uses a 0x-prefixed 20-byte EVM address. The address style may look familiar from other EVM networks, but the selected chain still matters. Assets on zkSync Era should be reviewed and managed as zkSync Era assets.

Where is the private key for a zkSync Era account created?

The key for the zkSync Era account is created inside the card’s secure element and is not exported from it. The card uses an EAL6+-certified chip, and signing for the 0x address is performed by the card.

Does the card have its own biometric sensor?

No. The app unlock flow can use the biometric check already available on the phone through the Cryptnox app. The card itself has no biometric sensor. The card remains the signing device for the zkSync Era account.

How does the second card back up a zkSync Era wallet?

The Dual-Card Set ships uninitialised. During setup, the seed is created inside both cards’ secure elements, so the second card is the backup for the same zkSync Era account. By default, there is no recovery phrase to write down.

Can zkSync Era be used through WalletConnect or MetaMask?

Yes. The free Cryptnox app on iOS and Android connects to Web3 through WalletConnect and works with MetaMask. For zkSync Era, keep the selected network on zkSync Era Mainnet and review whether the asset is ETH or an ERC-20 token.

Is the Cryptnox wallet an HD wallet with a new receive address for each transaction?

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.

Does Cryptnox ship worldwide, and will I pay import duties?

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.