In the booming Web3 world, the secure and seamless interaction between decentralized applications (DApp) and personal crypto wallets is at the core of the user experience. WalletConnect is the star protocol that addresses this critical need, having become the de facto standard for connecting wallets to DApps. This article will delve into the core principles, unique value, and application scenarios of WalletConnect.

Root of the Problem: The Gap Between Wallets and DApps

• The 'Offline' Nature of Wallets: Mainstream wallets such as MetaMask (excluding the browser extension), Trust Wallet, and Ledger Live typically exist as standalone applications on mobile or desktop, designed to operate independently to maximize the security of private keys.

• The 'Online' Demand of DApps: DApps primarily run in web browsers and require frequent interactions with users' wallets: requesting signatures, initiating transactions, reading on-chain data, etc.

• A Natural Divide: Wallet applications and DApps in browsers exist in different sandbox environments and cannot directly 'call' each other like traditional Web2 applications.