Struct HashBuilder
pub struct HashBuilder<K = AddedRemovedKeys> {
pub key: Nibbles,
pub value: HashBuilderValue,
pub stack: Vec<RlpNode>,
pub state_masks: Vec<TrieMask>,
pub tree_masks: Vec<TrieMask>,
pub hash_masks: Vec<TrieMask>,
pub stored_in_database: bool,
pub updated_branch_nodes: Option<HashMap<Nibbles, BranchNodeCompact, RandomState>>,
pub proof_retainer: Option<ProofRetainer<K>>,
pub rlp_buf: Vec<u8>,
}
trie
only.Expand description
A component used to construct the root hash of the trie.
The primary purpose of a Hash Builder is to build the Merkle proof that is essential for verifying the integrity and authenticity of the trie’s contents. It achieves this by constructing the root hash from the hashes of child nodes according to specific rules, depending on the type of the node (branch, extension, or leaf).
Here’s an overview of how the Hash Builder works for each type of node:
- Branch Node: The Hash Builder combines the hashes of all the child nodes of the branch node, using a cryptographic hash function like SHA-256. The child nodes’ hashes are concatenated and hashed, and the result is considered the hash of the branch node. The process is repeated recursively until the root hash is obtained.
- Extension Node: In the case of an extension node, the Hash Builder first encodes the node’s shared nibble path, followed by the hash of the next child node. It concatenates these values and then computes the hash of the resulting data, which represents the hash of the extension node.
- Leaf Node: For a leaf node, the Hash Builder first encodes the key-path and the value of the leaf node. It then concatenates the encoded key-path and value, and computes the hash of this concatenated data, which represents the hash of the leaf node.
The Hash Builder operates recursively, starting from the bottom of the trie and working its way up, combining the hashes of child nodes and ultimately generating the root hash. The root hash can then be used to verify the integrity and authenticity of the trie’s data by constructing and verifying Merkle proofs.
Fields§
§key: Nibbles
§value: HashBuilderValue
§stack: Vec<RlpNode>
§state_masks: Vec<TrieMask>
§tree_masks: Vec<TrieMask>
§hash_masks: Vec<TrieMask>
§stored_in_database: bool
§updated_branch_nodes: Option<HashMap<Nibbles, BranchNodeCompact, RandomState>>
§proof_retainer: Option<ProofRetainer<K>>
§rlp_buf: Vec<u8>
Implementations§
§impl<K> HashBuilder<K>
impl<K> HashBuilder<K>
pub fn with_updates(self, retain_updates: bool) -> HashBuilder<K>
pub fn with_updates(self, retain_updates: bool) -> HashBuilder<K>
Enables the Hash Builder to store updated branch nodes.
Call HashBuilder::split to get the updates to branch nodes.
pub fn with_proof_retainer<K2>(
self,
retainer: ProofRetainer<K2>,
) -> HashBuilder<K2>
pub fn with_proof_retainer<K2>( self, retainer: ProofRetainer<K2>, ) -> HashBuilder<K2>
Enable specified proof retainer.
pub fn set_updates(&mut self, retain_updates: bool)
pub fn set_updates(&mut self, retain_updates: bool)
Enables the Hash Builder to store updated branch nodes.
Call HashBuilder::split to get the updates to branch nodes.
§impl<K> HashBuilder<K>where
K: AsRef<AddedRemovedKeys>,
impl<K> HashBuilder<K>where
K: AsRef<AddedRemovedKeys>,
pub fn split(
self,
) -> (HashBuilder<K>, HashMap<Nibbles, BranchNodeCompact, RandomState>)
pub fn split( self, ) -> (HashBuilder<K>, HashMap<Nibbles, BranchNodeCompact, RandomState>)
Splits the HashBuilder into a HashBuilder and hash builder updates.
pub fn take_proof_nodes(&mut self) -> ProofNodes
pub fn take_proof_nodes(&mut self) -> ProofNodes
Take and return retained proof nodes.
pub fn updates_len(&self) -> usize
pub fn updates_len(&self) -> usize
The number of total updates accrued.
Returns 0
if Self::with_updates was not called.
pub fn print_stack(&self)
pub fn print_stack(&self)
Print the current stack of the Hash Builder.
pub fn add_leaf(&mut self, key: Nibbles, value: &[u8])
pub fn add_leaf(&mut self, key: Nibbles, value: &[u8])
Adds a new leaf element and its value to the trie hash builder.
§Panics
Panics if the new key does not come after the current key.
pub fn add_leaf_unchecked(&mut self, key: Nibbles, value: &[u8])
pub fn add_leaf_unchecked(&mut self, key: Nibbles, value: &[u8])
Adds a new leaf element and its value to the trie hash builder, without checking the order of the new key. This is only for performance-critical usage that guarantees keys are inserted in sorted order.
pub fn add_branch(
&mut self,
key: Nibbles,
value: FixedBytes<32>,
stored_in_database: bool,
)
pub fn add_branch( &mut self, key: Nibbles, value: FixedBytes<32>, stored_in_database: bool, )
Adds a new branch element and its hash to the trie hash builder.
pub fn root(&mut self) -> FixedBytes<32>
pub fn root(&mut self) -> FixedBytes<32>
Returns the current root hash of the trie builder.
Trait Implementations§
§impl<K> Clone for HashBuilder<K>where
K: Clone,
impl<K> Clone for HashBuilder<K>where
K: Clone,
§fn clone(&self) -> HashBuilder<K>
fn clone(&self) -> HashBuilder<K>
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more§impl<K> Debug for HashBuilder<K>where
K: Debug,
impl<K> Debug for HashBuilder<K>where
K: Debug,
§impl Default for HashBuilder
impl Default for HashBuilder
§fn default() -> HashBuilder
fn default() -> HashBuilder
§impl From<HashBuilder> for HashBuilderState
impl From<HashBuilder> for HashBuilderState
§fn from(state: HashBuilder) -> HashBuilderState
fn from(state: HashBuilder) -> HashBuilderState
§impl From<HashBuilderState> for HashBuilder
impl From<HashBuilderState> for HashBuilder
§fn from(state: HashBuilderState) -> HashBuilder
fn from(state: HashBuilderState) -> HashBuilder
Auto Trait Implementations§
impl<K> Freeze for HashBuilder<K>where
K: Freeze,
impl<K> RefUnwindSafe for HashBuilder<K>where
K: RefUnwindSafe,
impl<K> Send for HashBuilder<K>where
K: Send,
impl<K> Sync for HashBuilder<K>where
K: Sync,
impl<K> Unpin for HashBuilder<K>where
K: Unpin,
impl<K> UnwindSafe for HashBuilder<K>where
K: UnwindSafe,
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of a value. Read more§fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self
fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self
.tap()
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.tap_mut()
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builds.§fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
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.tap_borrow_mut()
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builds.§fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
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.tap_ref()
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builds.§fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
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builds.§fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
.tap_deref()
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builds.§impl<T> TryConv for T
impl<T> TryConv for T
§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
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impl<T> WithSubscriber for T
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impl<T> ErasedDestructor for Twhere
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Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.