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No Need for Revoke.cash on Cardano

Before we dive into the details, let's start with the conclusion: Cardano wallets do not use an "Approval" model. This means no hidden permissions are granted that could allow someone to move your funds without your consent. You simply do not need tools like Revoke.cash to "revoke" permissions on Cardano.

Introduction​

To understand why this is the case, we have to look at the fundamental difference between Cardano's core architecture (EUTxO model) and Ethereum's (Account model).

While we won't get bogged down in technical jargon, the summary is simple: Cardano does not have an "Approval" or "Allowance" mechanism. Unlike Ethereum, your assets stay firmly in your control until the moment you explicitly send them.

How Ethereum Works (The Risk)​

In Ethereum, when you use Uniswap or any DApp, you must first send an Approve transaction.

  • The Logic: You tell a token contract: "I allow this DEX contract to pull up to 1,000,000 USDT from my wallet."
  • The Risk: Many malicious websites trick users into clicking "Infinite Approval." Once you approve, even if you never visit that site again, a hacker can drain your wallet at any time. This is exactly why tools like Revoke.cash are necessary on Ethereum.

How Cardano Works (The Security)​

Because Cardano uses the EUTxO model, every on-chain operation is explicit and predictable.

  • The Logic: Transactions on Cardano are built and signed as a complete package. When you sign a transaction, your wallet clearly shows you exactly which assets are being moved and where they are going.
  • The Advantage: It’s transparent. Ethereum's Account model makes many on-chain behaviors unpredictable, which is why it requires broad approvals to function smoothly. Cardano's model removes this complexity and the associated risks.

Security Best Practices for Cardano Wallets​

Does "no approval risk" mean you can use a Cardano wallet without any worries? Not quite. While you don't have to worry about historical "hidden" permissions, you must still be vigilant.

The most critical moment on Cardano is the act of Signing.

Since there is no "Approve" step, the moment you sign a transaction, the assets are moved immediately. You must:

  1. Check the Destination: Verify the address you are sending to.
  2. Verify the Assets: Ensure the amount and the specific tokens being moved are correct.

On Cardano, your safety depends on your current signature, not your past approvals. Always stay alert when your wallet asks for your spending password!