Curly braces, or curly brackets, are symbols used in various programming languages to define blocks of code or to encapsulate data structures like object literals. In the context of programming for blockchain and smart contracts, they serve a critical role.When writing smart contracts, developers use curly braces to group statements or declarations that perform a function. For example, a function may have several lines of code that execute together, and these lines are enclosed within curly braces to signify that they belong to that function.Additionally, in representing data, curly braces are often used to define objects. In this case, they enclose key-value pairs, allowing developers to structure data in a way that is easy to manipulate and access. This organization is vital for tasks like handling transactions, maintaining user accounts, or storing crypto assets.Overall, curly braces are fundamental tools for structuring both code and data, allowing developers to create efficient, organized, and functional applications in the cryptocurrency space.