Struct sp_runtime::proving_trie::BasicProvingTrie
source · pub struct BasicProvingTrie<Hashing, Key, Value>where
Hashing: Hasher,{ /* private fields */ }
Expand description
A helper structure for building a basic base-16 merkle trie and creating compact proofs for that
trie. Proofs are created with latest substrate trie format (LayoutV1
), and are not compatible
with proofs using LayoutV0
.
Implementations§
source§impl<Hashing, Key, Value> BasicProvingTrie<Hashing, Key, Value>where
Hashing: Hasher,
Key: Encode,
Value: Encode,
impl<Hashing, Key, Value> BasicProvingTrie<Hashing, Key, Value>where
Hashing: Hasher,
Key: Encode,
Value: Encode,
sourcepub fn generate_for<I>(items: I) -> Result<Self, DispatchError>where
I: IntoIterator<Item = (Key, Value)>,
pub fn generate_for<I>(items: I) -> Result<Self, DispatchError>where
I: IntoIterator<Item = (Key, Value)>,
Create a new instance of a ProvingTrie
using an iterator of key/value pairs.
sourcepub fn query(&self, key: Key) -> Option<Value>where
Value: Decode,
pub fn query(&self, key: Key) -> Option<Value>where
Value: Decode,
Query a value contained within the current trie. Returns None
if the
nodes within the current MemoryDB
are insufficient to query the item.
sourcepub fn create_proof(&self, keys: &[Key]) -> Result<Vec<Vec<u8>>, DispatchError>
pub fn create_proof(&self, keys: &[Key]) -> Result<Vec<Vec<u8>>, DispatchError>
Create a compact merkle proof needed to prove all keys
and their values are in the trie.
Returns None
if the nodes within the current MemoryDB
are insufficient to create a
proof.
This function makes a proof with latest substrate trie format (LayoutV1
), and is not
compatible with LayoutV0
.
When verifying the proof created by this function, you must include all of the keys and values of the proof, else the verifier will complain that extra nodes are provided in the proof that are not needed.
sourcepub fn create_single_value_proof(
&self,
key: Key
) -> Result<Vec<Vec<u8>>, DispatchError>
pub fn create_single_value_proof( &self, key: Key ) -> Result<Vec<Vec<u8>>, DispatchError>
Create a compact merkle proof needed to prove a single key and its value are in the trie.
Returns None
if the nodes within the current MemoryDB
are insufficient to create a
proof.
This function makes a proof with latest substrate trie format (LayoutV1
), and is not
compatible with LayoutV0
.
Auto Trait Implementations§
impl<Hashing, Key, Value> RefUnwindSafe for BasicProvingTrie<Hashing, Key, Value>where
Hashing: RefUnwindSafe,
Key: RefUnwindSafe,
Value: RefUnwindSafe,
<Hashing as Hasher>::Out: RefUnwindSafe,
impl<Hashing, Key, Value> Send for BasicProvingTrie<Hashing, Key, Value>
impl<Hashing, Key, Value> Sync for BasicProvingTrie<Hashing, Key, Value>
impl<Hashing, Key, Value> Unpin for BasicProvingTrie<Hashing, Key, Value>
impl<Hashing, Key, Value> UnwindSafe for BasicProvingTrie<Hashing, Key, Value>where
Hashing: UnwindSafe,
Key: UnwindSafe,
Value: UnwindSafe,
<Hashing as Hasher>::Out: UnwindSafe,
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