什麼是 MSG

MsgSender, or $msg, is a unique global variable intrinsic to the Solidity programming language, which governs smart contract interactions on the Ethereum blockchain. Specifically, msg.sender serves as a mechanism for identifying the address from which the current function call originates. This variable plays an indispensable role in enabling contracts to effectively interface with the blockchain and its users.

The primary purpose of MsgSender is to maintain the integrity and security of transactions. By accurately identifying the sender of any given transaction, smart contracts can execute functions, enforce access permissions, and manage ownership with a high degree of precision. This secure identification allows developers to create robust dApps (decentralized applications) that uphold user trust and facilitate seamless interactions.