Struct CachedChain 

pub struct CachedChain<F> { /* private fields */ }

A ChainStorage that reads each slot once, through a function the frontend gives.

The reading is the frontend’s — this crate opens no connections — but the caching and the labelling are the same wherever the words come from, so they live here rather than once per frontend.

Implementations

impl<F> CachedChain<F>

where F: Fn(&str, &Word) -> Option<Word>,

pub fn new(label: impl Into<String>, read: F) -> Self

label says where the words come from, as a user-facing phrase such as the chain at block 21000000.

Trait Implementations

impl<F> ChainStorage for CachedChain<F>

where F: Fn(&str, &Word) -> Option<Word>,

fn word(&self, address: &str, slot: &Word) -> Option<Word>

The word at slot of address, or None when it could not be read.

fn label(&self) -> &str

Where these words come from, as a user-facing phrase such as the chain at block 21000000.

impl<F> Debug for CachedChain<F>

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.