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ParticipationFlags

dig_slashing::participation::flags

Struct ParticipationFlags 

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pub struct ParticipationFlags(pub u8);
Expand description

Per-validator attestation-participation bitmask.

Implements DSL-074. Traces to SPEC §3.10.

§Operations

  • set(flag_index) — additive OR; idempotent.
  • has(flag_index) — read.
  • is_source_timely / is_target_timely / is_head_timely — named accessors mirroring Ethereum Altair nomenclature (spec §2.9).

§Design rationale

Using a single u8 keeps the state tracker’s per-validator storage at 1 byte — critical for the ParticipationTracker (DSL-078) which holds two epochs’ worth of flags for every validator in the active set (millions of entries at scale).

§Default

ParticipationFlags::default() → all bits zero. Matches a validator that has not yet been credited with any flag in the current epoch.

Tuple Fields§

§0: u8

Implementations§

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impl ParticipationFlags

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pub fn set(&mut self, flag_index: u8)

Additive OR-set of the bit at flag_index.

Idempotent — calling set(i) twice leaves the bitmask unchanged. Other bits are preserved.

§Panics

Does NOT panic for flag_index >= 8 — the shift wraps in release but evaluates to a no-op under valid protocol use (only three flags are defined). Callers SHOULD stick to the TIMELY_*_FLAG_INDEX constants.

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pub fn has(&self, flag_index: u8) -> bool

Read the bit at flag_index. true iff the flag was ever set().

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pub fn is_source_timely(&self) -> bool

Convenience: has(TIMELY_SOURCE_FLAG_INDEX).

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pub fn is_target_timely(&self) -> bool

Convenience: has(TIMELY_TARGET_FLAG_INDEX).

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pub fn is_head_timely(&self) -> bool

Convenience: has(TIMELY_HEAD_FLAG_INDEX).

Trait Implementations§

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impl Clone for ParticipationFlags

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fn clone(&self) -> ParticipationFlags

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ParticipationFlags

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

Formats the value using the given formatter. Read more
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impl Default for ParticipationFlags

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fn default() -> ParticipationFlags

Returns the “default value” for a type. Read more
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impl<'de> Deserialize<'de> for ParticipationFlags

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Hash for ParticipationFlags

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for ParticipationFlags

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for ParticipationFlags

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Copy for ParticipationFlags

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impl Eq for ParticipationFlags

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impl StructuralPartialEq for ParticipationFlags

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