# Utilities

- [HexString](/utilities/hex.md)
- [Uint8Array (U8a)](/utilities/uint8array-u8a.md)
- [String](/utilities/string.md)
- [Hash functions](/utilities/hash-functions.md)
- [Address](/utilities/address.md)
- [BigInt & number](/utilities/bigint-and-number.md)
- [Balances](/utilities/balances.md)
- [Merkleized Metadata](/utilities/merkleized-metadata.md): RFC-0078: Merkleized Metadata Implementation