Trait frame_support::storage::StoragePrefixedMap

pub trait StoragePrefixedMap<Value: FullCodec> {
    fn module_prefix() -> &'static [u8];
    fn storage_prefix() -> &'static [u8];

    fn final_prefix() -> [u8; 32] { ... }
    fn remove_all() { ... }
    fn iter() -> PrefixIterator<Value> { ... }
}

Trait for maps that store all its value after a unique prefix.

By default the final prefix is:

Twox128(module_prefix) ++ Twox128(storage_prefix)

Required methods

Important traits for &'_ mut [u8]

impl<'_> Write for &'_ mut [u8]impl<'_> Read for &'_ [u8]

fn module_prefix() -> &'static [u8]

Module prefix. Used for generating final key.

Important traits for &'_ mut [u8]

impl<'_> Write for &'_ mut [u8]impl<'_> Read for &'_ [u8]

fn storage_prefix() -> &'static [u8]

Storage prefix. Used for generating final key.

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Provided methods

fn final_prefix() -> [u8; 32]

fn remove_all()

Important traits for PrefixIterator<Value>

impl<Value: Decode> Iterator for PrefixIterator<Value> type Item = Value;

fn iter() -> PrefixIterator<Value>

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Implementors

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