Struct StepSnapshot 

pub struct StepSnapshot {
    pub stack: Vec<Word>,
    pub memory: Option<Arc<str>>,
    pub storage: Arc<BTreeMap<String, String>>,
    pub storage_diff: BTreeMap<String, StorageChange>,
    pub transient_storage: BTreeMap<String, String>,
    pub return_data: Option<Arc<str>>,
}

The machine state one step captured.

memory and storage are shared: a backend building steps hands the previous step’s value on unchanged, so a trace holds one copy of memory per change rather than one per step. Reads see plain values through Deref; a step that changes them gets its own.

Fields

stack: Vec<Word>

memory: Option<Arc<str>>

Memory as one unprefixed hex string.

storage: Arc<BTreeMap<String, String>>

storage_diff: BTreeMap<String, StorageChange>

transient_storage: BTreeMap<String, String>

The transient slots this step read or wrote, with their value after it.

return_data: Option<Arc<str>>

The return data buffer before this step, as unprefixed hex; None when empty.

Implementations

impl StepSnapshot

pub fn new( stack: Vec<Word>, memory: Option<String>, storage: BTreeMap<String, String>, storage_diff: BTreeMap<String, StorageChange>, ) -> Self

A snapshot that owns its values, for a backend or a test building one from parts.

pub fn with_transient_storage( self, transient_storage: BTreeMap<String, String>, ) -> Self

The same snapshot with transient_storage set.

pub fn with_return_data(self, return_data: Option<String>) -> Self

The same snapshot with return_data set; empty data is stored as None.

pub fn is_empty(&self) -> bool

Trait Implementations

impl Clone for StepSnapshot

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StepSnapshot

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

Formats the value using the given formatter.

impl Default for StepSnapshot

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for StepSnapshot

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for StepSnapshot

impl PartialEq for StepSnapshot

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for StepSnapshot

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for StepSnapshot