penumbra_tct::storage

Trait Read

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pub trait Read {
    type Error;
    type HashesIter<'a>: Iterator<Item = Result<(Position, u8, Hash), Self::Error>> + 'a
       where Self: 'a;
    type CommitmentsIter<'a>: Iterator<Item = Result<(Position, StateCommitment), Self::Error>> + 'a
       where Self: 'a;

    // Required methods
    fn position(&mut self) -> Result<StoredPosition, Self::Error>;
    fn forgotten(&mut self) -> Result<Forgotten, Self::Error>;
    fn hash(
        &mut self,
        position: Position,
        height: u8,
    ) -> Result<Option<Hash>, Self::Error>;
    fn hashes(&mut self) -> Self::HashesIter<'_>;
    fn commitment(
        &mut self,
        position: Position,
    ) -> Result<Option<StateCommitment>, Self::Error>;
    fn commitments(&mut self) -> Self::CommitmentsIter<'_>;
}
Expand description

A synchronous storage backend capable of reading stored Hashes and [Commitment]s as well as storing the current Position.

Required Associated Types§

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type Error

The error returned when something goes wrong in a request.

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type HashesIter<'a>: Iterator<Item = Result<(Position, u8, Hash), Self::Error>> + 'a where Self: 'a

The type of iterator returned when reading hashes from the database.

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type CommitmentsIter<'a>: Iterator<Item = Result<(Position, StateCommitment), Self::Error>> + 'a where Self: 'a

The type of iterator returned when reading commitments from the database.

Required Methods§

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fn position(&mut self) -> Result<StoredPosition, Self::Error>

Fetch the current position stored.

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fn forgotten(&mut self) -> Result<Forgotten, Self::Error>

Fetch the current forgotten version.

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fn hash( &mut self, position: Position, height: u8, ) -> Result<Option<Hash>, Self::Error>

Fetch a specific hash at the given position and height, if it exists.

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fn hashes(&mut self) -> Self::HashesIter<'_>

Get the full list of all internal hashes stored, indexed by position and height.

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fn commitment( &mut self, position: Position, ) -> Result<Option<StateCommitment>, Self::Error>

Fetch a specific commitment at the given position, if it exists.

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fn commitments(&mut self) -> Self::CommitmentsIter<'_>

Get the full list of all commitments stored, indexed by position.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§