Struct KeyComposer 

pub struct KeyComposer;

Contains all rules related to storage key creation.

Implementations

impl KeyComposer

pub const fn concat(left: Key, right: Key) -> Key

Concatenate two Key into one during compilation.

pub const fn from_str(str: &str) -> Key

Return the storage key from the supplied str.

pub const fn from_bytes(bytes: &[u8]) -> Key

Returns the storage key from the supplied bytes.

pub fn compute_key( struct_name: &str, variant_name: &str, field_name: &str, ) -> Result<Key, Error>

Evaluates the storage key of the field in the structure, variant or union.

1. Compute the ASCII byte representation of struct_name and call it S.
2. If variant_name is not empty then computes the ASCII byte representation and call it V. 1. Compute the ASCII byte representation of field_name and call it F. 1. Concatenate (S and F) or (S, V and F) using :: as separator and call it C. 1. The XXH32 hash of C is the storage key.

Note

• variant_name is empty for structures and unions.
• if the field is unnamed then field_name is "{}" where {} is a number of the field.