Storage
Most useful Pint contracts require some sort of persistent storage that represent state. After all, a blockchain is a decentralized distributed database and contracts are a way to enforce rules on how "entries" in this database are allowed to change. Therefore, having the ability to express those database entries using variables and dynamic containers is quite useful. For that reason, Pint offers a way to declare and access a variety of storage types.
In this chapter, we will cover the following:
- How to declare and access storage variables with statically-sized types.
- How to declare and access storage variables with dynamically-sized types.
- How to access storage variables that belong to an external contract.