Trait Database 

pub trait Database: NonStaticAny {
    type Error: Error + Send + Sync + 'static;

    // Required methods
    fn get_account(
        &mut self,
        address: &Address,
    ) -> Result<Option<AccountInfo>, Self::Error>;
    fn get_code_by_hash(
        &mut self,
        code_hash: &FixedBytes<32>,
    ) -> Result<Bytecode, Self::Error>;
    fn get_storage(
        &mut self,
        address: &Address,
        key: &Uint<256, 4>,
    ) -> Result<Uint<256, 4>, Self::Error>;
    fn get_block_hash(
        &mut self,
        number: &Uint<256, 4>,
    ) -> Result<FixedBytes<32>, Self::Error>;

    // Provided method
    fn is_fatal(error: &Self::Error) -> bool { ... }
}

Available on crate feature evm only.

Backing database implementation with a concrete error type.

Required Associated Types

type Error: Error + Send + Sync + 'static

Database error type.

Required Methods

fn get_account( &mut self, address: &Address, ) -> Result<Option<AccountInfo>, Self::Error>

Loads account information.

fn get_code_by_hash( &mut self, code_hash: &FixedBytes<32>, ) -> Result<Bytecode, Self::Error>

Loads bytecode by code hash.

fn get_storage( &mut self, address: &Address, key: &Uint<256, 4>, ) -> Result<Uint<256, 4>, Self::Error>

Loads a persistent storage slot.

fn get_block_hash( &mut self, number: &Uint<256, 4>, ) -> Result<FixedBytes<32>, Self::Error>

Loads a historical block hash.

Callers only request numbers inside the BLOCKHASH window, so a hash the database cannot provide is a database failure reported through the error, never a benign miss.

Provided Methods

fn is_fatal(error: &Self::Error) -> bool

Whether a concrete database error is an internal failure rather than invalid input.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementations on Foreign Types

impl<'a, T> Database for &'a mut T

where T: 'a + Database + ?Sized, &'a mut T: NonStaticAny,

type Error = <T as Database>::Error

fn is_fatal(error: &<&'a mut T as Database>::Error) -> bool

fn get_account( &mut self, address: &Address, ) -> Result<Option<AccountInfo>, <&'a mut T as Database>::Error>

fn get_code_by_hash( &mut self, code_hash: &FixedBytes<32>, ) -> Result<Bytecode, <&'a mut T as Database>::Error>

fn get_storage( &mut self, address: &Address, key: &Uint<256, 4>, ) -> Result<Uint<256, 4>, <&'a mut T as Database>::Error>

fn get_block_hash( &mut self, number: &Uint<256, 4>, ) -> Result<FixedBytes<32>, <&'a mut T as Database>::Error>

impl<T> Database for Box<T>

where T: Database + ?Sized, Box<T>: NonStaticAny,

type Error = <T as Database>::Error

fn is_fatal(error: &<Box<T> as Database>::Error) -> bool

fn get_account( &mut self, address: &Address, ) -> Result<Option<AccountInfo>, <Box<T> as Database>::Error>

fn get_code_by_hash( &mut self, code_hash: &FixedBytes<32>, ) -> Result<Bytecode, <Box<T> as Database>::Error>

fn get_storage( &mut self, address: &Address, key: &Uint<256, 4>, ) -> Result<Uint<256, 4>, <Box<T> as Database>::Error>

fn get_block_hash( &mut self, number: &Uint<256, 4>, ) -> Result<FixedBytes<32>, <Box<T> as Database>::Error>

Implementors

impl Database for EmptyDB

type Error = !

impl<DB> Database for CachedReadsDbMut<'_, DB>

where DB: Database,

type Error = <DB as Database>::Error

impl<DB> Database for StateProviderDatabase<DB>

where DB: EvmStateProvider,

Available on crate feature std only.

type Error = ProviderError

impl<ExtDB> Database for CacheDB<ExtDB>

where ExtDB: DynDatabase,

type Error = DatabaseError