anvil::eth::backend::mem::in_memory_db

Struct MemDb

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pub struct MemDb {
    pub inner: CacheDB<EmptyDBWrapper>,
    pub state_snapshots: StateSnapshots<CacheDB<EmptyDBWrapper>>,
}
Expand description

In-memory [Database] for Anvil.

This acts like a wrapper type for FoundryEvmInMemoryDB but is capable of applying snapshots.

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§inner: CacheDB<EmptyDBWrapper>§state_snapshots: StateSnapshots<CacheDB<EmptyDBWrapper>>

Trait Implementations§

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impl Database for MemDb

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type Error = DatabaseError

The database error type.
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fn basic( &mut self, address: Address, ) -> Result<Option<AccountInfo>, <MemDb as Database>::Error>

Get basic account information.
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fn code_by_hash( &mut self, code_hash: FixedBytes<32>, ) -> Result<Bytecode, <MemDb as Database>::Error>

Get account code by its hash.
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fn storage( &mut self, address: Address, index: Uint<256, 4>, ) -> Result<Uint<256, 4>, <MemDb as Database>::Error>

Get storage value of address at index.
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fn block_hash( &mut self, number: u64, ) -> Result<FixedBytes<32>, <MemDb as Database>::Error>

Get block hash by block number.
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impl DatabaseCommit for MemDb

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fn commit(&mut self, changes: HashMap<Address, Account, RandomState>)

Commit changes to the database.
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impl DatabaseRef for MemDb

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type Error = DatabaseError

The database error type.
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fn basic_ref( &self, address: Address, ) -> Result<Option<AccountInfo>, <MemDb as DatabaseRef>::Error>

Get basic account information.
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fn code_by_hash_ref( &self, code_hash: FixedBytes<32>, ) -> Result<Bytecode, <MemDb as DatabaseRef>::Error>

Get account code by its hash.
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fn storage_ref( &self, address: Address, index: Uint<256, 4>, ) -> Result<Uint<256, 4>, <MemDb as DatabaseRef>::Error>

Get storage value of address at index.
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fn block_hash_ref( &self, number: u64, ) -> Result<FixedBytes<32>, <MemDb as DatabaseRef>::Error>

Get block hash by block number.
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impl Db for MemDb

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fn snapshot_state(&mut self) -> U256

Creates a new snapshot

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fn insert_account(&mut self, address: Address, account: AccountInfo)

Inserts an account
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fn set_storage_at( &mut self, address: Address, slot: B256, val: B256, ) -> DatabaseResult<()>

Sets the balance of the given address
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fn insert_block_hash(&mut self, number: U256, hash: B256)

inserts a blockhash for the given number
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fn dump_state( &self, at: BlockEnv, best_number: U64, blocks: Vec<SerializableBlock>, transactions: Vec<SerializableTransaction>, historical_states: Option<SerializableHistoricalStates>, ) -> DatabaseResult<Option<SerializableState>>

Write all chain data to serialized bytes buffer
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fn revert_state(&mut self, id: U256, action: RevertStateSnapshotAction) -> bool

Reverts a state snapshot. Read more
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fn maybe_state_root(&self) -> Option<B256>

Returns the state root if possible to compute
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fn current_state(&self) -> StateDb

Returns the current, standalone state of the Db
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fn set_nonce(&mut self, address: Address, nonce: u64) -> DatabaseResult<()>

Sets the nonce of the given address
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fn set_balance(&mut self, address: Address, balance: U256) -> DatabaseResult<()>

Sets the balance of the given address
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fn set_code(&mut self, address: Address, code: Bytes) -> DatabaseResult<()>

Sets the balance of the given address
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fn load_state(&mut self, state: SerializableState) -> DatabaseResult<bool>

Deserialize and add all chain data to the backend storage
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impl Debug for MemDb

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Default for MemDb

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fn default() -> MemDb

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

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fn maybe_reset( &mut self, _url: Option<String>, _block_number: BlockId, ) -> Result<(), String>

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fn maybe_flush_cache(&self) -> Result<(), String>

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fn maybe_inner(&self) -> Result<&BlockchainDb, String>

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impl MaybeFullDatabase for MemDb

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fn as_dyn(&self) -> &dyn DatabaseRef<Error = DatabaseError>

Returns a reference to the database as a dyn DatabaseRef.
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fn maybe_as_full_db(&self) -> Option<&HashMap<Address, DbAccount>>

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fn clear_into_state_snapshot(&mut self) -> StateSnapshot

Clear the state and move it into a new StateSnapshot.
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fn read_as_state_snapshot(&self) -> StateSnapshot

Read the state snapshot. Read more
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fn clear(&mut self)

Clears the entire database
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fn init_from_state_snapshot(&mut self, snapshot: StateSnapshot)

Reverses clear_into_snapshot by initializing the db’s state with the state snapshot.

Auto Trait Implementations§

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impl Freeze for MemDb

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impl RefUnwindSafe for MemDb

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impl Send for MemDb

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impl Sync for MemDb

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impl Unpin for MemDb

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impl UnwindSafe for MemDb

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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 216 bytes