{"id":7166,"date":"2024-01-10T00:31:31","date_gmt":"2024-01-10T00:31:31","guid":{"rendered":"https:\/\/de.fi\/blog\/?p=7166"},"modified":"2024-01-11T00:33:44","modified_gmt":"2024-01-11T00:33:44","slug":"manage-revoke-cronos-token-approvals","status":"publish","type":"post","link":"https:\/\/de.fi\/blog\/manage-revoke-cronos-token-approvals","title":{"rendered":"How to Manage & Revoke Cronos Token Approvals"},"content":{"rendered":"\n

Cronos<\/a> is one of the most popular alternative Layer 1 chains for DeFi. With over $300 million in TVL, there are countless yield farming<\/a>, NFT, and social dapp opportunities for users. However, while Cronos is trusted as a best-in-class network, you must stay vigilant to avoid potential crypto rug pulls<\/a> across the chain. Like any other permissionless blockchain, you’re only a few clicks away from a phishing scam<\/a> or honeypot<\/a> exploit.<\/p>\n\n\n\n

One of the most important keys to reinforcing your safety on Cronos is understanding the approvals and permissions<\/a> granted by your DeFi wallet<\/a>. If you’re auditing your Cronos account activity and looking to find a way to remove potentially harmful permissions or token approvals, you’re in the right place. <\/p>\n\n\n\n

In this blog, we’ll walk through what Cronos token approvals are and how you can audit + revoke them using the free De.Fi Shield<\/a> tool.<\/p>\n\n\n\n

What Are Cronos Token Approvals?<\/h2>\n\n\n\n

Cronos token approvals can go by many names including token permissions, smart contract permissions, token allowances, etc. To be clear though, these are all referencing the same concept: settings within your wallet that allow for dapps to access and move Cronos network crypto assets on your behalf.<\/p>\n\n\n\n

Examples of this could include a DEX like VVS Finance or an NFT exchange like Minted. When you are interacting with these platforms, the only way for them to fulfill their duties is for you to allow their underlying smart contract to interact with and extract the Cronos network assets you wish to use. This is done by signing an approval with your wallet.<\/p>\n\n\n\n

In the screenshot below, you can see the process of granting VVS Finance DEX permissions to interact with the USDC tokens<\/a> on Cronos stored within a MetaMask wallet<\/a>. This token approval uses a specific custom spending cap as well which is a security best practice:<\/p>\n\n\n

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\"cronos<\/figure>\n<\/div>\n\n\n

These permissions are incredibly powerful because they allow the smart contract you interact with to have control over your Cronos wallet’s funds even if you do not approve a specific transaction.<\/em> This can lead to a nightmare scenario of losing access to your funds under the following circumstances:<\/p>\n\n\n\n

You grant approvals to an untrustworthy smart contract:<\/strong> Token approvals are the main attack vector for\u00a0crypto phishing scams<\/a>. If you\u2019ve approved a malicious Cronos smart contract to be an unlimited spender of a token, your entire balance will likely be wiped out nearly instantly after the approval is confirmed.<\/p>\n\n\n\n

You grant approvals to a smart contract which is eventually compromised:<\/strong> If a contract that you\u2019ve interacted with before has a vulnerability and is hacked, the hackers may find a way to transfer all tokens from users who have previously granted token approvals to the breached contract. An example of this was the infamous Multichain bridge hack:<\/p>\n\n\n\n

Multichain, a cross-chain bridge, said that an important vulnerability affecting WETH, PERI, OMT, WBNB, MATIC, AVAX was discovered and fixed. If the user has authorized, remove any approvals of the 6 tokens asap. Otherwise the assets will be at risk. https:\/\/t.co\/wGIVduM1WR<\/a><\/p>— Wu Blockchain (@WuBlockchain) January 17, 2022<\/a><\/blockquote>