Notes

Events allow logging to the Ethereum blockchain or other evm-equivalent blockchains. Some use cases for events are:

• Listening for events and updating user interface
• A cheap form of storage

Code

solidity
Events.sol
Copy
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract Event {
   // Event declaration
   // Up to 3 parameters can be indexed.
   // Indexed parameters helps you filter the logs by the indexed parameter
   event Log(address indexed sender, string message);
   event AnotherLog();

   function test() public {
       emit Log(msg.sender, "Hello World!");
       emit Log(msg.sender, "Hello EVM!");
       emit AnotherLog();
   }
}