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Revoke.cash Guide & Managing Approvals

Approvals are silent risks that build up over time.
Without regularly revoking unnecessary permissions, you expose your wallet to potential token drains from malicious or hacked contracts.

Why Token Approvals Are Dangerous​

  • Unlimited Approval: Many DeFi apps request infinite spending allowances for convenience.
  • Persistence: Approvals remain active forever unless manually revoked.
  • Attack Surface: Any compromised contract with your token approval can immediately transfer your funds.

Introduction to Revoke.cash​

Revoke.cash is a trusted tool that lets you quickly review and revoke ERC-20 token approvals across multiple blockchains.

  • Free to use
  • Connects securely via WalletConnect or MetaMask
  • Supports Ethereum, Polygon, Arbitrum, Optimism, and more

Official site: https://revoke.cash

How to Use Revoke.cash​

Step 1: Connect Your Wallet​

  • Visit the Revoke.cash website.
  • Click "Connect" and select your preferred wallet.
  • Ensure you’re connected to the correct network (e.g., Ethereum Mainnet).

Connect Wallet Demo

Step 2: Review Existing Approvals​

  • After connecting, a list of all token approvals appears.
  • For each token, you’ll see:
    • Approved Contract: The contract allowed to spend.
    • Allowance Amount: The approved limit (often infinite).

Look for approvals you no longer recognize or use.

Step 3: Revoke or Edit Allowances​

  • Revoke: Completely remove the contract’s permission to spend your tokens.
  • Edit: Reduce the approved amount to a specific limit rather than unlimited.

Click "Revoke" → Confirm the transaction in your wallet.

Pro Tip: Always prefer revoking over editing unless actively interacting with the protocol.

Best Practices for Approval Management​

  • Minimal Trust Model: Approve minimal amounts per transaction instead of granting unlimited access.
  • Periodic Checkups: Review approvals monthly, especially after using new dApps.
  • Dedicated Wallets: Use separate wallets for interacting with untrusted dApps versus storing assets.
  • Alerting Tools: Use Forta, DeBank, or Wallet Guard to monitor new approvals automatically.

Costs to Expect​

  • Revoking an approval requires a small gas fee.
  • Group revocations can be more cost-effective during periods of low network congestion.

Tip: Use Layer 2 networks (e.g., Arbitrum, Optimism) to revoke approvals at lower cost if possible.

Advanced: Batch Revoke​

For heavy DeFi users, Revoke.cash supports batch revoking multiple approvals in a single transaction to save gas.

  • Select multiple entries → Click "Batch Revoke" → Confirm once.

Ensure you review each batch carefully to avoid accidentally revoking critical dApp permissions you still actively use.

Conclusion​

Maintaining a clean approval list is one of the simplest but most powerful defenses against asset loss.
Using Revoke.cash regularly turns silent risks into controlled, visible security hygiene.

Next Steps​

Congratulations! You've completed Module 4: Security Tools!
You are now equipped with actionable, professional-grade defenses for safe DeFi usage.

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