What does WalletConnect actually do for you every time you scan a DApp QR code?
Every time you click 'Connect Wallet' on Opensea and successfully connect with MetaMask after scanning the code, you might think it's just 'scanning a code to go through the process', but behind it lies a complete set of security logic. The first step of WalletConnect is to generate a 'temporary session key', packaging key information such as your wallet address, the DApp contract address you want to interact with, and the type of interaction (like transfer/authorization) using end-to-end encryption technology into a 'secure data packet', which is only sent to the wallet you are currently using.
Next, the wallet will pop up a verification request locally, asking you to confirm 'whether to allow this DApp to access your address'. This step is equivalent to the wallet locally verifying 'whether you are the private key holder'. Throughout the process, the private key never leaves your device and does not go through WalletConnect's servers. Once you confirm, the wallet will return an 'authorization token', and only after the DApp receives this token can you proceed to the next operation (like minting an NFT).
For example🌰: If you scan a code on a counterfeit DApp, even if the DApp tries to secretly obtain your private key, it can only get the encrypted data packet, which cannot be decrypted. This is also why phishing incidents in Web3 have been frequent in recent years, but there are very few cases of private key leaks due to WalletConnect connections. This 'local verification + encrypted transmission' model is precisely why it has become the core reason for being the standard connection tool for over 70,000 DApps.
