Token allowances are an essential part of web3, and issuing virtually unlimited approvals is also not problematic in itself: most of the time, it makes your life easier and reduces how much gas you're paying (since you need to pay for each separate approval). Once you're satisfied with the conditions of the transaction, tap 'Approve' to complete the process. Hit 'Next' to move to the second of two screens in the process, where you review your limit: 'Use site suggestion', which inserts the amount the dapp suggests.'Max', which inserts your account's balance of the relevant token.If you're not sure, see our main article on token allowances (a.k.a. We designed this interface to give you more control and visibility over your token allowances, since you'll always be prompted to input a preferred limit, rather than default to the amount proposed by the dapp (though you can still select this default allowance if you choose).Īll you need to do is input an amount you're comfortable with in the 'Spending cap' field. Check out the tabs below to see how this looks on Mobile and Extension:Īny interaction with a dapp that requires a token approval will call up a screen that reads "Spending cap request for your ": How? Well, when you come across a request to grant access to your tokens, a MetaMask approval window will appear. To preserve your control and agency, as well as giving you the tools to protect yourself from one of the most common scam attack vectors around, MetaMask enables you to customize how many tokens you allow dapps to access. Pre-approving access to a number of tokens at once is, therefore, something of a quality-of-life feature that makes your web3 activities smoother. In most cases, token allowances that exceed what you need for any single transaction are very convenient it would be time-consuming to have to grant permission anew for every transaction you wish to make on the dapp. That means that if you've granted an allowance for a dapp to access your USDT, for example, it is only USDT that it can access. Token allowances are specific to one token. Then, when you decide, for example, to add 1,000 of token A and 1,000 of token B to a liquidity pool, the dapp already has your permission to take the necessary quantity of tokens straight out of your wallet, and all you have to do is confirm the transaction. When you interact with any dapp that involves your ERC-20 token holdings in some way or another, you're likely to have to approve its access to that token's smart contract (the same applies for ERC-20 equivalents on other chains, such as BEP-20 on BNB Chain). Tl dr: MetaMask allows you to manually edit the number of tokens dapps can access.
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