Function Modifiers and Events
Explore how to use function modifiers to enforce conditions in Solidity smart contracts, reducing code repetition and enhancing security. Understand events for logging contract activities, enabling external applications like frontends to track important changes.
Modifiers
Function modifiers are instructions that change the behavior of a function that they are attached to. They are commonly used to define logical conditions that must be satisfied for a call to a function to be made.
A modifier is declared with the modifier keyword and specifies the logical condition to be verified with the require keyword (with an optional revert message). If the condition is met, the execution of the function follows and is indicated by the _; command. ...