pub struct EmptyDBWrapper(EmptyDB);Expand description
An empty database that always returns default values when queried.
This is just a simple wrapper for revm::EmptyDB but implements DatabaseError instead, this
way we can unify all different Database impls
This will also always return Some(AccountInfo):
The [Database] implementation for CacheDB manages an AccountState for the
DbAccount, this will be set to AccountState::NotExisting if the account does not exist yet.
This is because there’s a distinction between “non-existing” and “empty”,
see https://github.com/bluealloy/revm/blob/8f4348dc93022cffb3730d9db5d3ab1aad77676a/crates/revm/src/db/in_memory_db.rs#L81-L83.
If an account is NotExisting, Database::basic_ref will always return None for the
requested AccountInfo.
To prevent this, we ensure that a missing account is never marked as NotExisting by always
returning Some with this type, which will then insert a default [AccountInfo] instead
of one marked as AccountState::NotExisting.
Tuple Fields§
§0: EmptyDBTrait Implementations§
Source§impl Clone for EmptyDBWrapper
impl Clone for EmptyDBWrapper
Source§fn clone(&self) -> EmptyDBWrapper
fn clone(&self) -> EmptyDBWrapper
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moreSource§impl DatabaseRef for EmptyDBWrapper
impl DatabaseRef for EmptyDBWrapper
Source§type Error = DatabaseError
type Error = DatabaseError
Source§fn basic_ref(
&self,
_address: Address,
) -> Result<Option<AccountInfo>, Self::Error>
fn basic_ref( &self, _address: Address, ) -> Result<Option<AccountInfo>, Self::Error>
Source§fn code_by_hash_ref(&self, code_hash: B256) -> Result<Bytecode, Self::Error>
fn code_by_hash_ref(&self, code_hash: B256) -> Result<Bytecode, Self::Error>
Source§fn storage_ref(
&self,
address: Address,
index: U256,
) -> Result<U256, Self::Error>
fn storage_ref( &self, address: Address, index: U256, ) -> Result<U256, Self::Error>
Source§fn block_hash_ref(&self, number: u64) -> Result<B256, Self::Error>
fn block_hash_ref(&self, number: u64) -> Result<B256, Self::Error>
Source§impl Debug for EmptyDBWrapper
impl Debug for EmptyDBWrapper
Source§impl Default for EmptyDBWrapper
impl Default for EmptyDBWrapper
Source§fn default() -> EmptyDBWrapper
fn default() -> EmptyDBWrapper
Auto Trait Implementations§
impl Freeze for EmptyDBWrapper
impl RefUnwindSafe for EmptyDBWrapper
impl Send for EmptyDBWrapper
impl Sync for EmptyDBWrapper
impl Unpin for EmptyDBWrapper
impl UnwindSafe for EmptyDBWrapper
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