Struct sp_state_machine::TrieBackend[][src]

pub struct TrieBackend<S: TrieBackendStorage<H>, H: Hasher> { /* fields omitted */ }
Expand description

Patricia trie-based backend. Transaction type is an overlay of changes to commit.

Implementations

Copy the state, with applied updates

Insert values into backend trie.

Merge trie nodes into this backend.

Apply the given transaction to this backend and set the root to the given value.

Compare with another in-memory backend.

Create new trie-based backend.

Get backend essence reference.

Get backend storage reference.

Get trie root.

Consumes self and returns underlying storage.

Trait Implementations

An error type when fetching data is not possible.

Storage changes to be applied if committing

Type of trie backend storage.

Get keyed storage or None if there is nothing associated.

Get keyed child storage or None if there is nothing associated.

Return the next key in storage in lexicographic order or None if there is no value.

Return the next key in child storage in lexicographic order or None if there is no value.

Retrieve all entries keys which start with the given prefix and call f for each of those keys. Read more

Retrieve all entries keys and values of which start with the given prefix and call f for each of those keys. Read more

Iterate over storage starting at key, for a given prefix and child trie. Aborts as soon as f returns false. Warning, this fails at first error when usual iteration skips errors. If allow_missing is true, iteration stops when it reaches a missing trie node. Otherwise an error is produced. Read more

Retrieve all entries keys of storage and call f for each of those keys. Aborts as soon as f returns false. Read more

Retrieve all child entries keys which start with the given prefix and call f for each of those keys. Read more

Get all key/value pairs into a Vec.

Get all keys with given prefix

Calculate the storage root, with given delta over what is already stored in the backend, and produce a “transaction” that can be used to commit. Does not include child storage updates. Read more

Calculate the child storage root, with given delta over what is already stored in the backend, and produce a “transaction” that can be used to commit. The second argument is true if child storage root equals default storage root. Read more

Try convert into trie backend.

Register stats from overlay of state machine. Read more

Query backend usage statistics (i/o, memory) Read more

Wipe the state database.

Get keyed storage value hash or None if there is nothing associated.

Get child keyed storage value hash or None if there is nothing associated.

true if a key exists in storage.

true if a key exists in child storage.

Get all keys of child storage with given prefix

Calculate the storage root, with given delta over what is already stored in the backend, and produce a “transaction” that can be used to commit. Does include child storage updates. Read more

Commit given transaction to storage.

Get the read/write count of the db

Get the read/write count of the db

Get the whitelist for tracking db reads/writes

Update the whitelist for tracking db reads/writes

Estimate proof size

Extend storage info for benchmarking db

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Returns the “default value” for a type. Read more

Performs the conversion.

Performs the conversion.

Performs the conversion.

Performs the conversion.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait. Read more

Performs the conversion.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Performs the conversion.

Get a reference to the inner from the outer.

Get a mutable reference to the inner from the outer.

Should always be Self

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

The counterpart to unchecked_from.

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more