Crate sp_state_machine

Substrate state machine implementation.

Re-exports

pub use crate::backend::Backend;

pub use crate::backend::BackendTransaction;

pub use crate::backend::IterArgs;

pub use crate::backend::KeysIter;

pub use crate::backend::PairsIter;

pub use crate::backend::StorageIterator;

Modules

backend

State machine backends. These manage the code and storage of contracts.

Macros

debug

Logs a message at the debug level.

log_error

Logs a message at the error level.

trace

Constructs an event at the trace level.

warn

Logs a message at the warn level.

Structs

BasicExternalities

Simple Map-based Externalities impl.

CompactProof

Storage proof in compact form.

Ext

Wraps a read-only backend, call executor, and current overlayed changes.

KeyValueStates

Multiple key value state. States are ordered by root storage key.

KeyValueStorageLevel

A key value state at any storage level.

LayoutV0

substrate trie layout

LayoutV1

substrate trie layout, with external value nodes.

OffchainOverlayedChanges

In-memory storage for offchain workers recoding changes for the actual offchain storage implementation.

OverlayedChanges

The set of changes that are overlaid onto the backend.

ReadOnlyExternalities

Simple read-only externalities for any backend.

StateMachine

The substrate state machine.

StateMachineStats

Accumulated usage statistics specific to state machine crate.

StorageChanges

A storage changes structure that can be generated by the data collected in OverlayedChanges.

StorageProof

A proof that some set of key-value pairs are included in the storage trie. The proof contains the storage values so that the partial storage backend can be reconstructed by a verifier that does not already have access to the key-value pairs.

TestExternalities

Simple HashMap-based Externalities impl.

TrieBackend

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

TrieBackendBuilder

Builder for creating a TrieBackend.

UsageInfo

Usage statistics for state backend.

UsageUnit

Measured count of operations and total bytes.

Enums

BackendTrustLevel

Storage backend trust level.

ExecutionError

Externalities Error.

IndexOperation

Transaction index operation.

Constants

MAX_NESTED_TRIE_DEPTH

State machine only allows a single level of child trie.

Traits

Error

State Machine Error bound.

InspectState

Trait for inspecting state in any backend.

Storage

Patricia trie-based storage trait.

TrieBackendStorage

Key-value pairs storage that is used by trie backend essence.

TrieCacheProvider

A provider of trie caches that are compatible with trie_db::TrieDB.

TrieMut

A key-value datastore implemented as a database-backed modified Merkle tree.

Functions

create_proof_check_backend

Create a backend used for checking the proof, using H as hasher.

execution_proof_check

Check execution proof, generated by prove_execution call.

execution_proof_check_on_trie_backend

Check execution proof on proving backend, generated by prove_execution call.

new_in_mem

Create a new empty instance of in-memory backend.

prove_child_read

Generate child storage read proof.

prove_child_read_on_trie_backend

Generate storage read proof on pre-created trie backend.

prove_execution

Prove execution using the given state backend, overlayed changes, and call executor.

prove_execution_on_trie_backend

Prove execution using the given trie backend, overlayed changes, and call executor. Produces a state-backend-specific “transaction” which can be used to apply the changes to the backing store, such as the disk. Execution proof is the set of all ‘touched’ storage DBValues from the backend.

prove_range_read_with_child_with_size

Generate range storage read proof, with child tries content. A size limit is applied to the proof with the exception that start_at and its following element are always part of the proof. If a key different than start_at is a child trie root, the child trie content will be included in the proof.

prove_range_read_with_child_with_size_on_trie_backend

Generate range storage read proof, with child tries content. See prove_range_read_with_child_with_size.

prove_range_read_with_size

Generate range storage read proof.

prove_range_read_with_size_on_trie_backend

Generate range storage read proof on an existing trie backend.

prove_read

Generate storage read proof.

prove_read_on_trie_backend

Generate storage read proof on pre-created trie backend.

read_child_proof_check

Check child storage read proof, generated by prove_child_read call.

read_child_proof_check_on_proving_backend

Check child storage read proof on pre-created proving backend.

read_proof_check

Check storage read proof, generated by prove_read call.

read_proof_check_on_proving_backend

Check storage read proof on pre-created proving backend.

read_range_proof_check

Check child storage range proof, generated by prove_range_read_with_size call.

read_range_proof_check_on_proving_backend

Check storage range proof on pre-created proving backend.

read_range_proof_check_with_child

Check storage range proof with child trie included, generated by prove_range_read_with_child_with_size call.

read_range_proof_check_with_child_on_proving_backend

Check storage range proof on pre-created proving backend.

Type Aliases

ChildStorageCollection

In memory arrays of storage values for multiple child tries.

DBValue

Database value

DefaultError

Default error type to use with state machine trie backend.

DefaultHandler

Default handler of the execution manager.

InMemoryBackend

Trie backend with in-memory storage.

MemoryDB

Reexport from hash_db, with genericity set for Hasher trait. This uses a noops KeyFunction (key addressing must be hashed or using an encoding scheme that avoid key conflict).

OffchainChangesCollection

In memory array of storage values.

StorageCollection

In memory array of storage values.

StorageKey

Storage key.

StorageValue

Storage value.

TrieDBMutV0

Persistent trie database write-access interface for a given hasher.

TrieDBMutV1

Persistent trie database write-access interface for a given hasher.