Struct BackendInner
pub struct BackendInner {
pub launched_with_fork: Option<(ForkId, Uint<256, 4>, usize)>,
pub issued_local_fork_ids: HashMap<Uint<256, 4>, ForkId>,
pub created_forks: HashMap<ForkId, usize>,
pub forks: Vec<Option<Fork>>,
pub state_snapshots: StateSnapshots<BackendStateSnapshot<BackendDatabaseSnapshot>>,
pub has_state_snapshot_failure: bool,
pub caller: Option<Address>,
pub next_fork_id: Uint<256, 4>,
pub persistent_accounts: HashSet<Address>,
pub spec_id: SpecId,
pub cheatcode_access_accounts: HashSet<Address>,
}
Expand description
Container type for various Backend related data
Fields§
§launched_with_fork: Option<(ForkId, Uint<256, 4>, usize)>
Stores the ForkId
of the fork the Backend
launched with from the start.
In other words if Backend::spawn()
was called with a CreateFork
command, to launch
directly in fork mode, this holds the corresponding fork identifier of this fork.
issued_local_fork_ids: HashMap<Uint<256, 4>, ForkId>
This tracks numeric fork ids and the ForkId
used by the handler.
This is necessary, because there can be multiple Backends
associated with a single
ForkId
which is only a pair of endpoint + block. Since an existing fork can be
modified (e.g. roll_fork
), but this should only affect the fork that’s unique for the
test and not the ForkId
This ensures we can treat forks as unique from the context of a test, so rolling to another
is basically creating(or reusing) another ForkId
that’s then mapped to the previous
issued local numeric identifier, that remains constant, even if the underlying fork
backend changes.
created_forks: HashMap<ForkId, usize>
tracks all the created forks
Contains the index of the corresponding ForkDB
in the forks
vec
forks: Vec<Option<Fork>>
Holds all created fork databases
state_snapshots: StateSnapshots<BackendStateSnapshot<BackendDatabaseSnapshot>>
Contains state snapshots made at a certain point
has_state_snapshot_failure: bool
Tracks whether there was a failure in a snapshot that was reverted
The Test contract contains a bool variable that is set to true when an assert
function
failed. When a snapshot is reverted, it reverts the state of the evm, but we still want
to know if there was an assert
that failed after the snapshot was taken so that we can
check if the test function passed all asserts even across snapshots. When a snapshot is
reverted we get the current revm::JournaledState
which contains the state that we can
check if the _failed
variable is set,
additionally
caller: Option<Address>
Tracks the caller of the test function
next_fork_id: Uint<256, 4>
Tracks numeric identifiers for forks
persistent_accounts: HashSet<Address>
All accounts that should be kept persistent when switching forks. This means all accounts stored here don’t use a separate storage section on each fork instead the use only one that’s persistent across fork swaps.
spec_id: SpecId
The configured spec id
cheatcode_access_accounts: HashSet<Address>
All accounts that are allowed to execute cheatcodes
Implementations§
§impl BackendInner
impl BackendInner
pub fn ensure_fork_id(&self, id: Uint<256, 4>) -> Result<&ForkId, Report>
pub fn ensure_fork_index(&self, id: &ForkId) -> Result<usize, Report>
pub fn ensure_fork_index_by_local_id( &self, id: Uint<256, 4>, ) -> Result<usize, Report>
pub fn forks_iter(&self) -> impl Iterator<Item = (Uint<256, 4>, &Fork)>
pub fn forks_iter(&self) -> impl Iterator<Item = (Uint<256, 4>, &Fork)>
Returns an iterator over Forks
pub fn forks_iter_mut(&mut self) -> impl Iterator<Item = &mut Fork>
pub fn forks_iter_mut(&mut self) -> impl Iterator<Item = &mut Fork>
Returns a mutable iterator over all Forks
pub fn revert_state_snapshot(
&mut self,
id: Uint<256, 4>,
fork_id: ForkId,
idx: usize,
fork: Fork,
)
pub fn revert_state_snapshot( &mut self, id: Uint<256, 4>, fork_id: ForkId, idx: usize, fork: Fork, )
Reverts the entire fork database
pub fn update_fork_mapping(
&mut self,
id: Uint<256, 4>,
fork_id: ForkId,
db: CacheDB<SharedBackend>,
journaled_state: JournaledState,
) -> usize
pub fn update_fork_mapping( &mut self, id: Uint<256, 4>, fork_id: ForkId, db: CacheDB<SharedBackend>, journaled_state: JournaledState, ) -> usize
Updates the fork and the local mapping and returns the new index for the fork_db
pub fn roll_fork( &mut self, id: Uint<256, 4>, new_fork_id: ForkId, backend: SharedBackend, ) -> Result<usize, Report>
pub fn insert_new_fork(
&mut self,
fork_id: ForkId,
db: CacheDB<SharedBackend>,
journaled_state: JournaledState,
) -> (Uint<256, 4>, usize)
pub fn insert_new_fork( &mut self, fork_id: ForkId, db: CacheDB<SharedBackend>, journaled_state: JournaledState, ) -> (Uint<256, 4>, usize)
Inserts a new ForkDB
and issues a new local fork identifier
Also returns the index where the ForDB
is stored
pub fn precompiles(&self) -> &'static Precompiles
pub fn new_journaled_state(&self) -> JournaledState
pub fn new_journaled_state(&self) -> JournaledState
Returns a new, empty, JournaledState
with set precompiles
Trait Implementations§
§impl Clone for BackendInner
impl Clone for BackendInner
§fn clone(&self) -> BackendInner
fn clone(&self) -> BackendInner
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more§impl Debug for BackendInner
impl Debug for BackendInner
§impl Default for BackendInner
impl Default for BackendInner
§fn default() -> BackendInner
fn default() -> BackendInner
Auto Trait Implementations§
impl Freeze for BackendInner
impl !RefUnwindSafe for BackendInner
impl Send for BackendInner
impl Sync for BackendInner
impl Unpin for BackendInner
impl !UnwindSafe for BackendInner
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Size: 408 bytes