Method unblind

crates/proof/mpt/src/node.rs:125–138

Unblinds the [`TrieNode`] if it is a [`TrieNode::Blinded`] node.

(&mut self, fetcher: &F)

    /// Unblinds the [`TrieNode`] if it is a [`TrieNode::Blinded`] node.
    pub fn unblind<F: TrieProvider>(&mut self, fetcher: &F) -> TrieNodeResult<()> {
        if let Self::Blinded { commitment } = self {
            if *commitment == EMPTY_ROOT_HASH {
                // If the commitment is the empty root hash, the node is empty, and we don't need to
                // reach out to the fetcher.
                *self = Self::Empty;
            } else {
                *self = fetcher
                    .trie_node_by_hash(*commitment)
                    .map_err(|e| TrieNodeError::Provider(e.to_string()))?;
            }
        }
        Ok(())
    }

    /// Walks down the trie to a leaf value with the given key, if it exists. Preimages for blinded
    /// nodes along the path are fetched using the `fetcher` function, and persisted in the inner