Yoroi is gone. The Cardano wallet was renamed SecondFi in 2026 and then shut down after a security incident, in which a flaw in how transactions were signed let attackers work out private keys from information already public on the blockchain. Its own site now says operations will not resume, and the team's remaining work is returning assets to affected users.
If you were affected, keep the app and your recovery phrase. SecondFi says at least one of them is needed to claim recovered assets, and it runs a checker so you can see whether your wallet was caught. A genuine checker will never ask you to sign anything.
For your tax report, the good news is that none of this depends on the wallet still working. Your Cardano history lives on the blockchain, and it can be rebuilt from your stake address whether or not the software ever runs again.
What you get out of the box
So importierst du.
Finding your stake address
- If you still have access to the wallet, look for the stake or reward address in the staking or delegation screen. It starts with stake1.
- If you do not, look up any Cardano address you know you owned on a block explorer. The explorer will show the stake address it belongs to.
- Use the stake address rather than a payment address. One wallet makes many payment addresses but only ever has one stake address.
- If you moved your funds to another wallet, add that too so the move pairs up rather than reading as a disposal.
On Kryptos
- Go to Kryptos.io and sign up with your Google account.
- From the menu, click Integrations.
- Click Add Integration and search for Yoroi.
- Click the Yoroi icon, then choose Import using Address.
- Give the wallet a name, paste your address, and click Import Your Transactions.
Good to know
- SecondFi says it will not resume normal operations, and its remaining work is returning assets to affected users.
- Keep the app and your recovery phrase. At least one is needed to claim recovered assets.
- A legitimate wallet checker never asks you to sign a transaction. Anything that does is not one.
- Your transaction history is on the blockchain and does not depend on the wallet software working.
- Yoroi dropped support for Ergo in 2023 and was Cardano-only after that.
Why the blockchain outlasts the wallet
When wallet software disappears it feels like the history goes with it. On Cardano it does not. Every transaction you ever made is on a public ledger that no company controls, and it stays there whether or not anyone maintains the app you used.
What you need to read it is the right identifier. Cardano wallets create a fresh address for almost every transaction, so any one address shows a sliver of your activity and makes the rest look like money going to strangers. Your stake address is different: every address the wallet ever made is tied to it, so it identifies the whole wallet in one string.
Find that, add it, and your Cardano years come back regardless of what happened to the software. For how disposals, staking income and losses are treated where you file, see the USA crypto tax guide or the UK crypto tax guide.
Verwalte dein Yoroi-Portfolio mit Kryptos.
History that outlived the wallet
Cardano records everything on a public ledger, so your stake address rebuilds the whole picture without needing the app to open ever again.
Moves out that were not sales
Shifting assets to a different Cardano wallet is a transfer between your own accounts. Add both and it reads correctly instead of looking like a disposal.
Losses documented properly
If assets were taken and not recovered, what supports a claim is a record of what you held, what it cost and what happened.
Automatisch prüfungssicher.
Wallets und Börsen verbunden? Steuerbericht mit einem Klick. Im Menü auf Berichte, dein Land auswählen, herunterladen.
One wallet, many addresses, one stake key
Cardano wallets create a new address for almost every transaction, so pasting one captures a fraction of your history and the rest looks like funds moving to strangers. The stake address is the exception: every address your wallet made shares it, so it identifies the whole wallet at once.
Staking rewards are income
Delegation rewards count at the value they had when they were credited. On Cardano they build up in a reward account and get pulled into a transaction when you withdraw, which is why they can be hard to match by hand.
Assets taken may be a loss
Where funds were stolen and not recovered, that may be claimable as a loss. Rules differ by country and usually turn on showing the loss is real and final, so keep every record.
Anything recovered is not new income
If assets come back to you, that is your own property returning rather than a windfall. The original cost carries across.
Standardmäßig schreibgeschützt.
- Kryptos only ever needs your public wallet address
- A public address is read-only. It can't move or spend anything
- We never ask for your recovery phrase or private key
- Remove a wallet whenever you like, and its data goes with it
Wenn etwas nicht synchronisiert.
You do not need to. Find any Cardano address you owned, look it up on a block explorer, and take the stake address from there.
You probably used a payment address. Cardano wallets create many of those. Use the stake address instead, which covers all of them.
Cardano rewards build up in a separate reward account and only appear when withdrawn. The accrual and the withdrawal are different moments.
Hängst du fest? Schreib uns an support@kryptos.io oder öffne den Live-Chat in der App.