# Hints

## 1. Define the `TreasureChest` opaque type.

- Opaque types are defined using the `opaque` keyword.

## 2. Define the `create` function.

- The [`string.length` function][length] can be used to get the length of a string.

## 3. Define `open` function.

- The `==` operator can be used to compare two strings for equality.

[length]: https://hexdocs.pm/gleam_stdlib/gleam/string.html#length