Trait sc_client_api::backend::AuxStore

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]>>(
        &self, 
        insert: I, 
        delete: D
    ) -> Result<()>;
    fn get_aux(&self, key: &[u8]) -> Result<Option<Vec<u8>>>;
}

Provides access to an auxiliary database.

Required methods

fn insert_aux<'a, 'b: 'a, 'c: 'a, I: IntoIterator<Item = &'a (&'c [u8], &'c [u8])>, D: IntoIterator<Item = &'a &'b [u8]>>(
    &self,
    insert: I,
    delete: D
) -> Result<()>

Insert auxiliary data into key-value store.

Deletions occur after insertions.

fn get_aux(&self, key: &[u8]) -> Result<Option<Vec<u8>>>

Query auxiliary data from key-value store.

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Implementors

impl<Block: BlockT> AuxStore for Backend<Block> where
    Block::Hash: Ord, 

fn insert_aux<'a, 'b: 'a, 'c: 'a, I: IntoIterator<Item = &'a (&'c [u8], &'c [u8])>, D: IntoIterator<Item = &'a &'b [u8]>>(
    &self,
    insert: I,
    delete: D
) -> Result<()>

fn get_aux(&self, key: &[u8]) -> Result<Option<Vec<u8>>>

impl<Block: BlockT> AuxStore for Blockchain<Block>

fn insert_aux<'a, 'b: 'a, 'c: 'a, I: IntoIterator<Item = &'a (&'c [u8], &'c [u8])>, D: IntoIterator<Item = &'a &'b [u8]>>(
    &self,
    insert: I,
    delete: D
) -> Result<()>

fn get_aux(&self, key: &[u8]) -> Result<Option<Vec<u8>>>

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