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Is there a way to detect if a token was already approved?

I want to show a button with 2 states (APRROVE USDC) and (CONFIRM SWAP). But, I do not how to get from the ERC20.sol contract a variable o methods that returns if the token was already approved or not.

How to store mnemonics in hd wallets?

I am developing a crypto wallet, I learned how to create a mnemonic phrase, the question arose of the safe storage of this phrase, where it is better to store it, given that the application is written on android, there is an idea to make a separate service for creating and transmitting these keys, but::Listen

I am developing a crypto wallet, I learned how to create a mnemonic phrase, the question arose of the safe storage of this phrase, where it is better to store it, given that the application is written on android, there is an idea to make a separate service for creating and transmitting these keys, but there is a fear that the request that goes between the user and the service can be intercepted, tell me how to store and how to transmit.

Is there a way to detect if a token was already approved?

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