Trait StateProvider 

pub trait StateProvider:
    BlockHashReader
    + AccountReader
    + BytecodeReader
    + StateRootProvider
    + StorageRootProvider
    + StateProofProvider
    + HashedPostStateProvider {
    // Required method
    fn storage(
        &self,
        account: Address,
        storage_key: FixedBytes<32>,
    ) -> Result<Option<Uint<256, 4>>, ProviderError>;

    // Provided methods
    fn account_code(
        &self,
        addr: &Address,
    ) -> Result<Option<Bytecode>, ProviderError> { ... }
    fn account_balance(
        &self,
        addr: &Address,
    ) -> Result<Option<Uint<256, 4>>, ProviderError> { ... }
    fn account_nonce(
        &self,
        addr: &Address,
    ) -> Result<Option<u64>, ProviderError> { ... }
}

An abstraction for a type that provides state data.

Required Methods

fn storage( &self, account: Address, storage_key: FixedBytes<32>, ) -> Result<Option<Uint<256, 4>>, ProviderError>

Get storage of given account.

Provided Methods

fn account_code( &self, addr: &Address, ) -> Result<Option<Bytecode>, ProviderError>

Get account code by its address.

Returns None if the account doesn’t exist or account is not a contract

fn account_balance( &self, addr: &Address, ) -> Result<Option<Uint<256, 4>>, ProviderError>

Get account balance by its address.

Returns None if the account doesn’t exist

fn account_nonce(&self, addr: &Address) -> Result<Option<u64>, ProviderError>

Get account nonce by its address.

Returns None if the account doesn’t exist

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<'a, N> StateProvider for MemoryOverlayStateProvider<N>

where N: NodePrimitives,

fn storage( &self, account: Address, storage_key: FixedBytes<32>, ) -> Result<Option<Uint<256, 4>>, ProviderError>

impl<'a, T> StateProvider for &'a T

where T: 'a + StateProvider + ?Sized, &'a T: BlockHashReader + AccountReader + BytecodeReader + StateRootProvider + StorageRootProvider + StateProofProvider + HashedPostStateProvider,

fn storage( &self, account: Address, storage_key: FixedBytes<32>, ) -> Result<Option<Uint<256, 4>>, ProviderError>

fn account_code( &self, addr: &Address, ) -> Result<Option<Bytecode>, ProviderError>

fn account_balance( &self, addr: &Address, ) -> Result<Option<Uint<256, 4>>, ProviderError>

fn account_nonce(&self, addr: &Address) -> Result<Option<u64>, ProviderError>

impl<N> StateProvider for MemoryOverlayStateProviderRef<'_, N>

where N: NodePrimitives,

fn storage( &self, address: Address, storage_key: FixedBytes<32>, ) -> Result<Option<Uint<256, 4>>, ProviderError>

impl<T> StateProvider for Arc<T>

where T: StateProvider + ?Sized, Arc<T>: BlockHashReader + AccountReader + BytecodeReader + StateRootProvider + StorageRootProvider + StateProofProvider + HashedPostStateProvider,

fn storage( &self, account: Address, storage_key: FixedBytes<32>, ) -> Result<Option<Uint<256, 4>>, ProviderError>

fn account_code( &self, addr: &Address, ) -> Result<Option<Bytecode>, ProviderError>

fn account_balance( &self, addr: &Address, ) -> Result<Option<Uint<256, 4>>, ProviderError>

fn account_nonce(&self, addr: &Address) -> Result<Option<u64>, ProviderError>

impl<T> StateProvider for Box<T>

where T: StateProvider + ?Sized, Box<T>: BlockHashReader + AccountReader + BytecodeReader + StateRootProvider + StorageRootProvider + StateProofProvider + HashedPostStateProvider,

fn storage( &self, account: Address, storage_key: FixedBytes<32>, ) -> Result<Option<Uint<256, 4>>, ProviderError>

fn account_code( &self, addr: &Address, ) -> Result<Option<Bytecode>, ProviderError>

fn account_balance( &self, addr: &Address, ) -> Result<Option<Uint<256, 4>>, ProviderError>

fn account_nonce(&self, addr: &Address) -> Result<Option<u64>, ProviderError>

Implementors

impl<'a, Provider: DBProvider + BlockHashReader + StorageSettingsCache> StateProvider for LatestStateProvider<Provider>

impl<'a, Provider: DBProvider + BlockNumReader + BlockHashReader + ChangeSetReader + StorageChangeSetReader + PruneCheckpointReader + StageCheckpointReader + StorageSettingsCache + RocksDBProviderFactory + NodePrimitivesProvider> StateProvider for HistoricalStateProvider<Provider>

impl<C, N> StateProvider for NoopProvider<C, N>

where C: Send + Sync, N: NodePrimitives,

impl<Provider, N> StateProvider for HistoricalStateProviderRef<'_, Provider, N>

where Provider: DBProvider + BlockNumReader + BlockHashReader + ChangeSetReader + StorageChangeSetReader + PruneCheckpointReader + StageCheckpointReader + StorageSettingsCache + RocksDBProviderFactory + NodePrimitivesProvider<Primitives = N>, N: NodePrimitives,

impl<Provider: DBProvider + BlockHashReader + StorageSettingsCache> StateProvider for LatestStateProviderRef<'_, Provider>

impl<T, ChainSpec> StateProvider for MockEthProvider<T, ChainSpec>

where T: NodePrimitives, ChainSpec: EthChainSpec + Send + Sync + 'static,

Available on crate features test-utils only.