Struct revm::JournaledState
source · pub struct JournaledState {
pub state: State,
pub transient_storage: TransientStorage,
pub logs: Vec<Log>,
pub depth: usize,
pub journal: Vec<Vec<JournalEntry>>,
pub spec: SpecId,
pub warm_preloaded_addresses: HashSet<Address>,
}
Expand description
JournalState is internal EVM state that is used to contain state and track changes to that state. It contains journal of changes that happened to state so that they can be reverted.
Fields§
§state: State
Current state.
transient_storage: TransientStorage
EIP-1153 transient storage that is discarded after every transactions
logs: Vec<Log>
logs
depth: usize
how deep are we in call stack.
journal: Vec<Vec<JournalEntry>>
journal with changes that happened between calls.
spec: SpecId
Ethereum before EIP-161 differently defined empty and not-existing account
Spec is needed for two things SpuriousDragon’s EIP-161 State clear
,
and for Cancun’s EIP-6780: SELFDESTRUCT in same transaction
warm_preloaded_addresses: HashSet<Address>
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§
source§impl JournaledState
impl JournaledState
sourcepub fn new(
spec: SpecId,
warm_preloaded_addresses: HashSet<Address>
) -> JournaledState
pub fn new( spec: SpecId, warm_preloaded_addresses: HashSet<Address> ) -> 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.
§Note
sourcepub fn set_spec_id(&mut self, spec: SpecId)
pub fn set_spec_id(&mut self, spec: SpecId)
Sets SpecId.
sourcepub 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.
sourcepub fn finalize(&mut self) -> (State, Vec<Log>)
pub fn finalize(&mut self) -> (State, Vec<Log>)
Does cleanup and returns modified state.
This resets the JournaledState to its initial state in Self::new
sourcepub 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>
sourcepub fn transfer<DB: Database>(
&mut self,
from: &Address,
to: &Address,
balance: U256,
db: &mut DB
) -> Result<Option<InstructionResult>, EVMError<DB::Error>>
pub fn transfer<DB: Database>( &mut self, from: &Address, to: &Address, balance: U256, db: &mut DB ) -> Result<Option<InstructionResult>, EVMError<DB::Error>>
Transfers balance from two accounts. Returns error if sender balance is not enough.
sourcepub fn create_account_checkpoint(
&mut self,
caller: Address,
address: Address,
balance: U256,
spec_id: SpecId
) -> Result<JournalCheckpoint, InstructionResult>
pub fn create_account_checkpoint( &mut self, caller: Address, address: Address, balance: U256, 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
.
sourcepub 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.
sourcepub fn checkpoint_commit(&mut self)
pub fn checkpoint_commit(&mut self)
Commit the checkpoint.
sourcepub fn checkpoint_revert(&mut self, checkpoint: JournalCheckpoint)
pub fn checkpoint_revert(&mut self, checkpoint: JournalCheckpoint)
Reverts all changes to state until given checkpoint.
sourcepub fn selfdestruct<DB: Database>(
&mut self,
address: Address,
target: Address,
db: &mut DB
) -> Result<SelfDestructResult, EVMError<DB::Error>>
pub fn selfdestruct<DB: Database>( &mut self, address: Address, target: Address, db: &mut DB ) -> Result<SelfDestructResult, EVMError<DB::Error>>
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:
sourcepub fn initial_account_load<DB: Database>(
&mut self,
address: Address,
slots: &[U256],
db: &mut DB
) -> Result<&mut Account, EVMError<DB::Error>>
pub fn initial_account_load<DB: Database>( &mut self, address: Address, slots: &[U256], db: &mut DB ) -> Result<&mut Account, EVMError<DB::Error>>
Initial load of account. This load will not be tracked inside journal
sourcepub fn load_account<DB: Database>(
&mut self,
address: Address,
db: &mut DB
) -> Result<(&mut Account, bool), EVMError<DB::Error>>
pub fn load_account<DB: Database>( &mut self, address: Address, db: &mut DB ) -> Result<(&mut Account, bool), EVMError<DB::Error>>
load account into memory. return if it is cold or warm accessed
sourcepub fn load_account_exist<DB: Database>(
&mut self,
address: Address,
db: &mut DB
) -> Result<LoadAccountResult, EVMError<DB::Error>>
pub fn load_account_exist<DB: Database>( &mut self, address: Address, db: &mut DB ) -> Result<LoadAccountResult, EVMError<DB::Error>>
Load account from database to JournaledState.
Return boolean pair where first is is_cold
second bool is_exists
.
sourcepub fn load_code<DB: Database>(
&mut self,
address: Address,
db: &mut DB
) -> Result<(&mut Account, bool), EVMError<DB::Error>>
pub fn load_code<DB: Database>( &mut self, address: Address, db: &mut DB ) -> Result<(&mut Account, bool), EVMError<DB::Error>>
Loads code.
sourcepub fn sload<DB: Database>(
&mut self,
address: Address,
key: U256,
db: &mut DB
) -> Result<(U256, bool), EVMError<DB::Error>>
pub fn sload<DB: Database>( &mut self, address: Address, key: U256, db: &mut DB ) -> Result<(U256, bool), EVMError<DB::Error>>
sourcepub fn sstore<DB: Database>(
&mut self,
address: Address,
key: U256,
new: U256,
db: &mut DB
) -> Result<SStoreResult, EVMError<DB::Error>>
pub fn sstore<DB: Database>( &mut self, address: Address, key: U256, new: U256, db: &mut DB ) -> Result<SStoreResult, EVMError<DB::Error>>
Stores storage slot. And returns (original,present,new) slot value.
Note:
account should already be present in our state.
sourcepub fn tload(&mut self, address: Address, key: U256) -> U256
pub fn tload(&mut self, address: Address, key: U256) -> U256
Read transient storage tied to the account.
EIP-1153: Transient storage opcodes
Trait Implementations§
source§impl Clone for JournaledState
impl Clone for JournaledState
source§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 moresource§impl Debug for JournaledState
impl Debug for JournaledState
source§impl<'de> Deserialize<'de> for JournaledState
impl<'de> Deserialize<'de> for JournaledState
source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
source§impl PartialEq for JournaledState
impl PartialEq for JournaledState
source§fn eq(&self, other: &JournaledState) -> bool
fn eq(&self, other: &JournaledState) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl Serialize for JournaledState
impl Serialize for JournaledState
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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