> ## Documentation Index
> Fetch the complete documentation index at: https://starkware-9575960b-chore-starknet-docs-url-migration.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# core::byte_array::ByteArray

Byte array type.

## Signature

```rust theme={null}

#[derive(Drop, Clone, PartialEq, Serde, Default)]
pub struct ByteArray {
    pub(crate) data: Array,
    pub(crate) pending_word: felt252,
    pub(crate) pending_word_len: u32,
}
```