CH11 Constructor and Modifier

• Constructors are special functions in a Solidity contract that is executed once when the contract is deployed to the blockchain.
• Modifiers are special functions that can modify the behavior of other functions. They are used to add conditions or checks before executing a function

CH12 Event

• Events and Logs: What's the Connection?

• How Do Events and Logs Work Together?

• Understanding Indexed and Non-Indexed Event Parameters

• Events vs. Functions:

• Use cases of Events