Struct SourceTargetMap 

pub struct SourceTargetMap;

Implementations

impl SourceTargetMap

pub fn entries<S: SourceTargetMapStore>( store: &mut S, root: Option<ContentHash>, limit: usize, budget: &mut MapBudget, ) -> Result<Vec<(ContentHash, ContentHash)>, MapError<S::Error>>

Bounded canonical enumeration for transfer verification and rebuilding indexes. Capture updates still use individual trie routes.

pub fn get<S: SourceTargetMapStore>( store: &mut S, root: Option<ContentHash>, key: ContentHash, budget: &mut MapBudget, ) -> Result<Option<ContentHash>, MapError<S::Error>>

pub fn update<S: SourceTargetMapStore>( store: &mut S, root: Option<ContentHash>, key: ContentHash, value: Option<ContentHash>, budget: &mut MapBudget, ) -> Result<Option<ContentHash>, MapError<S::Error>>

None deletes the key. Empty maps use a None root and store no node. Equal values and absent deletions write nothing. The returned root is the only publication point; keep the prior root when this returns an error.