storage_interface::state_view

Struct VerifiedStateView

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pub struct VerifiedStateView<'a> { /* private fields */ }
Expand description

VerifiedStateView is like a snapshot of the global state comprised of state view at two levels, persistent storage and memory.

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impl<'a> VerifiedStateView<'a>

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pub fn new( id: StateViewId, reader: Arc<dyn DbReader>, latest_persistent_version: Option<Version>, latest_persistent_state_root: HashValue, speculative_state: &'a SparseMerkleTree<AccountStateBlob>, pos_state: PosState, ) -> Self

Constructs a VerifiedStateView with persistent state view represented by latest_persistent_state_root plus a storage reader, and the in-memory speculative state on top of it represented by speculative_state.

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impl<'a> From<VerifiedStateView<'a>> for (HashMap<AccountAddress, AccountState>, HashMap<HashValue, SparseMerkleProof<AccountStateBlob>>)

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fn from(view: VerifiedStateView<'a>) -> Self

Converts to this type from the input type.
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impl<'a> StateView for VerifiedStateView<'a>

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fn id(&self) -> StateViewId

For logging and debugging purpose, identifies what this view is for.
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fn get(&self, access_path: &AccessPath) -> Result<Option<Vec<u8>>>

Gets the state for a single access path.
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fn multi_get( &self, _access_paths: &[AccessPath], ) -> Result<Vec<Option<Vec<u8>>>>

Gets states for a list of access paths.
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fn is_genesis(&self) -> bool

VM needs this method to know whether the current state view is for genesis state creation. Currently TransactionPayload::WriteSet is only valid for genesis state creation.
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fn pos_state(&self) -> &PosState

Auto Trait Implementations§

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impl<'a> !Freeze for VerifiedStateView<'a>

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impl<'a> !RefUnwindSafe for VerifiedStateView<'a>

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impl<'a> Send for VerifiedStateView<'a>

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impl<'a> Sync for VerifiedStateView<'a>

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impl<'a> Unpin for VerifiedStateView<'a>

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impl<'a> !UnwindSafe for VerifiedStateView<'a>

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