VerifiedPathProof

nomt_core::proof

Struct VerifiedPathProof 

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pub struct VerifiedPathProof { /* private fields */ }
Expand description

A verified path through the trie.

Each verified path can be used to check up to two kinds of statements:

  1. That a single key has a specific value.
  2. That a single or multiple keys do not have a value.

Statement (1) is true when the path leads to a leaf node and the leaf has the provided key and value.

Statement (2) is true for any key which begins with the proven path, where the terminal node is either not a leaf or contains a value for a different key.

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impl VerifiedPathProof

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pub fn terminal(&self) -> Option<&LeafData>

Get the terminal node. None signifies that this path concludes with a TERMINATOR.

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pub fn path(&self) -> &BitSlice<u8, Msb0> ⓘ

Get the proven path.

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pub fn root(&self) -> Node

Get the proven root.

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pub fn confirm_value( &self, expected_leaf: &LeafData, ) -> Result<bool, KeyOutOfScope>

Check whether this path resolves to the given leaf.

A return value of Ok(true) confirms that the key indeed has this value in the trie. Ok(false) confirms that this key has a different value or does not exist.

Fails if the key is out of the scope of this path.

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pub fn confirm_nonexistence( &self, key_path: &KeyPath, ) -> Result<bool, KeyOutOfScope>

Check whether this proves that a key has no value in the trie.

A return value of Ok(true) confirms that the key indeed has no value in the trie. A return value of Ok(false) means that the key definitely exists within the trie.

Fails if the key is out of the scope of this path.

Trait Implementations§

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impl Clone for VerifiedPathProof

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fn clone(&self) -> VerifiedPathProof

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for VerifiedPathProof

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

Formats the value using the given formatter. Read more

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