pub trait AuxStore {
    fn insert_aux<'a, 'b: 'a, 'c: 'a, I: IntoIterator<Item = &'a (&'c [u8], &'c [u8])>, D: IntoIterator<Item = &'a &'b [u8]>>(
        insert: I,
        delete: D
    ) -> Result<()>; fn get_aux(&self, key: &[u8]) -> Result<Option<Vec<u8>>>; }
Expand description

Provides access to an auxiliary database.

This is a simple global database not aware of forks. Can be used for storing auxiliary information like total block weight/difficulty for fork resolution purposes as a common use case.

Required Methods

Insert auxiliary data into key-value store.

Deletions occur after insertions.

Query auxiliary data from key-value store.