> Aztec.nr API reference, v6.0.0 (mainnet and testnet). Index: https://docs.aztec.network/aztec-nr-api/mainnet/llms.txt

# aztec-nr documentation

## Crates

- [address_note](/aztec-nr-api/mainnet/address_note/index.md): Note for an Aztec address value.
- [balance_set](/aztec-nr-api/mainnet/balance_set/index.md): State variable for private balances.
- [compressed_string](/aztec-nr-api/mainnet/compressed_string/index.md): Efficient string storage.
- [contract_instance_registry_interface](/aztec-nr-api/mainnet/contract_instance_registry_interface/index.md)
- [ecdsa_public_key_note](/aztec-nr-api/mainnet/ecdsa_public_key_note/index.md): Note for an ECDSA public key.
- [fee_juice_interface](/aztec-nr-api/mainnet/fee_juice_interface/index.md)
- [field_note](/aztec-nr-api/mainnet/field_note/index.md): Note for a `Field` value.
- [noir_aztec](/aztec-nr-api/mainnet/noir_aztec/index.md): The aztec-nr framework for writing Aztec smart contracts.
- [uint_note](/aztec-nr-api/mainnet/uint_note/index.md): Note for a numeric value.