ReasonJun

The main difference between fallback() and receive() in Solidity is that fallback() is called when a contract receives Ether without any calldata, while receive() is called when a contract receives Ether with empty calldata. In other words, fallback() is called when a user sends Ether to a contract directly, while receive() is called when a user calls a function on a contract without passing any..

Visibility in Solidity is used to control who can access and modify functions and state variables within a contract. There are four visibility levels in Solidity: Public: Public functions and state variables can be accessed by anyone, inside or outside of the contract. Internal: Internal functions and state variables can be accessed by any function within the contract, as well as any function wi..