Struct JournaledState
pub struct JournaledState {
pub state: HashMap<Address, Account, RandomState>,
pub transient_storage: HashMap<(Address, Uint<256, 4>), Uint<256, 4>, RandomState>,
pub logs: Vec<Log>,
pub depth: usize,
pub journal: Vec<Vec<JournalEntry>>,
pub spec: SpecId,
pub warm_preloaded_addresses: HashSet<Address, RandomState>,
}
Expand description
A journal of state changes internal to the EVM.
On each additional call, the depth of the journaled state is increased (depth
) and a new journal is added. The journal contains every state change that happens within that call, making it possible to revert changes made in a specific call.
Fields§
§state: HashMap<Address, Account, RandomState>
The current state.
transient_storage: HashMap<(Address, Uint<256, 4>), Uint<256, 4>, RandomState>
Transient storage that is discarded after every transaction.
See EIP-1153.
logs: Vec<Log>
Emitted logs.
depth: usize
The current call stack depth.
journal: Vec<Vec<JournalEntry>>
The journal of state changes, one for each call.
spec: SpecId
The spec ID for the EVM.
This spec is used for two things:
warm_preloaded_addresses: HashSet<Address, RandomState>
Warm loaded addresses are used to check if loaded address should be considered cold or warm loaded when the account is first accessed.
Note that this not include newly loaded accounts, account and storage
is considered warm if it is found in the State
.
Implementations§
§impl JournaledState
impl JournaledState
pub fn new(
spec: SpecId,
warm_preloaded_addresses: HashSet<Address, RandomState>,
) -> JournaledState
pub fn new( spec: SpecId, warm_preloaded_addresses: HashSet<Address, RandomState>, ) -> JournaledState
Create new JournaledState.
warm_preloaded_addresses is used to determine if address is considered warm loaded. In ordinary case this is precompile or beneficiary.
§Note
This function will journal state after Spurious Dragon fork. And will not take into account if account is not existing or empty.
pub fn set_spec_id(&mut self, spec: SpecId)
pub fn set_spec_id(&mut self, spec: SpecId)
Sets SpecId.
pub fn touch(&mut self, address: &Address)
pub fn touch(&mut self, address: &Address)
Mark account as touched as only touched accounts will be added to state. This is especially important for state clear where touched empty accounts needs to be removed from state.
pub fn clear(&mut self)
pub fn clear(&mut self)
Clears the JournaledState. Preserving only the spec.
pub fn finalize(&mut self) -> (HashMap<Address, Account, RandomState>, Vec<Log>)
pub fn finalize(&mut self) -> (HashMap<Address, Account, RandomState>, Vec<Log>)
Does cleanup and returns modified state.
This resets the JournaledState to its initial state in Self::new
pub fn set_code_with_hash(
&mut self,
address: Address,
code: Bytecode,
hash: FixedBytes<32>,
)
pub fn set_code_with_hash( &mut self, address: Address, code: Bytecode, hash: FixedBytes<32>, )
Set code and its hash to the account.
Note: Assume account is warm and that hash is calculated from code.
pub fn set_code(&mut self, address: Address, code: Bytecode)
pub fn set_code(&mut self, address: Address, code: Bytecode)
use it only if you know that acc is warm Assume account is warm
pub fn inc_nonce(&mut self, address: Address) -> Option<u64>
pub fn transfer<DB>(
&mut self,
from: &Address,
to: &Address,
balance: Uint<256, 4>,
db: &mut DB,
) -> Result<Option<InstructionResult>, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn transfer<DB>(
&mut self,
from: &Address,
to: &Address,
balance: Uint<256, 4>,
db: &mut DB,
) -> Result<Option<InstructionResult>, EVMError<<DB as Database>::Error>>where
DB: Database,
Transfers balance from two accounts. Returns error if sender balance is not enough.
pub fn create_account_checkpoint(
&mut self,
caller: Address,
address: Address,
balance: Uint<256, 4>,
spec_id: SpecId,
) -> Result<JournalCheckpoint, InstructionResult>
pub fn create_account_checkpoint( &mut self, caller: Address, address: Address, balance: Uint<256, 4>, spec_id: SpecId, ) -> Result<JournalCheckpoint, InstructionResult>
Create account or return false if collision is detected.
There are few steps done:
- Make created account warm loaded (AccessList) and this should be done before subroutine checkpoint is created.
- Check if there is collision of newly created account with existing one.
- Mark created account as created.
- Add fund to created account
- Increment nonce of created account if SpuriousDragon is active
- Decrease balance of caller account.
§Panics
Panics if the caller is not loaded inside of the EVM state.
This is should have been done inside create_inner
.
pub fn checkpoint(&mut self) -> JournalCheckpoint
pub fn checkpoint(&mut self) -> JournalCheckpoint
Makes a checkpoint that in case of Revert can bring back state to this point.
pub fn checkpoint_commit(&mut self)
pub fn checkpoint_commit(&mut self)
Commit the checkpoint.
pub fn checkpoint_revert(&mut self, checkpoint: JournalCheckpoint)
pub fn checkpoint_revert(&mut self, checkpoint: JournalCheckpoint)
Reverts all changes to state until given checkpoint.
pub fn selfdestruct<DB>(
&mut self,
address: Address,
target: Address,
db: &mut DB,
) -> Result<StateLoad<SelfDestructResult>, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn selfdestruct<DB>(
&mut self,
address: Address,
target: Address,
db: &mut DB,
) -> Result<StateLoad<SelfDestructResult>, EVMError<<DB as Database>::Error>>where
DB: Database,
Performances selfdestruct action. Transfers balance from address to target. Check if target exist/is_cold
Note: balance will be lost if address and target are the same BUT when current spec enables Cancun, this happens only when the account associated to address is created in the same tx
references:
pub fn initial_account_load<DB>(
&mut self,
address: Address,
storage_keys: impl IntoIterator<Item = Uint<256, 4>>,
db: &mut DB,
) -> Result<&mut Account, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn initial_account_load<DB>(
&mut self,
address: Address,
storage_keys: impl IntoIterator<Item = Uint<256, 4>>,
db: &mut DB,
) -> Result<&mut Account, EVMError<<DB as Database>::Error>>where
DB: Database,
Initial load of account. This load will not be tracked inside journal
pub fn load_account<DB>(
&mut self,
address: Address,
db: &mut DB,
) -> Result<StateLoad<&mut Account>, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn load_account<DB>(
&mut self,
address: Address,
db: &mut DB,
) -> Result<StateLoad<&mut Account>, EVMError<<DB as Database>::Error>>where
DB: Database,
load account into memory. return if it is cold or warm accessed
pub fn load_account_delegated<DB>(
&mut self,
address: Address,
db: &mut DB,
) -> Result<AccountLoad, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn load_code<DB>(
&mut self,
address: Address,
db: &mut DB,
) -> Result<StateLoad<&mut Account>, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn load_code<DB>(
&mut self,
address: Address,
db: &mut DB,
) -> Result<StateLoad<&mut Account>, EVMError<<DB as Database>::Error>>where
DB: Database,
Loads code.
pub fn sload<DB>(
&mut self,
address: Address,
key: Uint<256, 4>,
db: &mut DB,
) -> Result<StateLoad<Uint<256, 4>>, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn sload<DB>(
&mut self,
address: Address,
key: Uint<256, 4>,
db: &mut DB,
) -> Result<StateLoad<Uint<256, 4>>, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn sstore<DB>(
&mut self,
address: Address,
key: Uint<256, 4>,
new: Uint<256, 4>,
db: &mut DB,
) -> Result<StateLoad<SStoreResult>, EVMError<<DB as Database>::Error>>where
DB: Database,
pub fn sstore<DB>(
&mut self,
address: Address,
key: Uint<256, 4>,
new: Uint<256, 4>,
db: &mut DB,
) -> Result<StateLoad<SStoreResult>, EVMError<<DB as Database>::Error>>where
DB: Database,
Stores storage slot. And returns (original,present,new) slot value.
Note:
account should already be present in our state.
pub fn tload(&mut self, address: Address, key: Uint<256, 4>) -> Uint<256, 4>
pub fn tload(&mut self, address: Address, key: Uint<256, 4>) -> Uint<256, 4>
Read transient storage tied to the account.
EIP-1153: Transient storage opcodes
Trait Implementations§
§impl Clone for JournaledState
impl Clone for JournaledState
§fn clone(&self) -> JournaledState
fn clone(&self) -> JournaledState
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read more§impl Debug for JournaledState
impl Debug for JournaledState
§impl<'de> Deserialize<'de> for JournaledState
impl<'de> Deserialize<'de> for JournaledState
§fn deserialize<__D>(
__deserializer: __D,
) -> Result<JournaledState, <__D as Deserializer<'de>>::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(
__deserializer: __D,
) -> Result<JournaledState, <__D as Deserializer<'de>>::Error>where
__D: Deserializer<'de>,
§impl PartialEq for JournaledState
impl PartialEq for JournaledState
§impl Serialize for JournaledState
impl Serialize for JournaledState
§fn serialize<__S>(
&self,
__serializer: __S,
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where
__S: Serializer,
fn serialize<__S>(
&self,
__serializer: __S,
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where
__S: Serializer,
impl Eq for JournaledState
impl StructuralPartialEq for JournaledState
Auto Trait Implementations§
impl Freeze for JournaledState
impl RefUnwindSafe for JournaledState
impl Send for JournaledState
impl Sync for JournaledState
impl Unpin for JournaledState
impl UnwindSafe for JournaledState
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impl<T> WithSubscriber for T
Source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘwhere
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘwhere
S: Into<Dispatch>,
Source§fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ
fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ
impl<T> DeserializeOwned for Twhere
T: for<'de> Deserialize<'de>,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeDebug for Twhere
T: Debug,
impl<T> MaybeSend for Twhere
T: Send,
impl<T> MaybeSendSync for T
impl<T> NippyJarHeader for T
impl<T> RpcObject for Twhere
T: RpcParam + RpcReturn,
impl<T> RpcParam for T
impl<T> RpcReturn 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: 184 bytes