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EventSignature

neo_devpack_solidity::ir

Struct EventSignature 

Source 
pub struct EventSignature {
    pub canonical: String,
    pub topic0: [u8; 32],
    pub params: Vec<EventParamInfo>,
    pub is_anonymous: bool,
}
Expand description

Precomputed EVM-canonical event signature metadata.

Built once per event at module lowering time so emit sites can push topic[0] as a 32-byte literal (no runtime hashing) and branch on each parameter’s indexed / is_dynamic flags without re-deriving them.

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§canonical: String

Canonical signature string Name(type1,type2,...) — matches Solidity bytes4 selector = keccak256(...) convention and is fed to keccak to produce topic[0].

§topic0: [u8; 32]

keccak256(canonical) — 32 bytes, BE-layout, pushed as topic[0]. For anonymous events this field is still populated (for completeness) but the lowering skips the topic0 prepend per the EVM ABI.

§params: Vec<EventParamInfo>

Per-parameter metadata in declaration order.

§is_anonymous: bool

Whether the event was declared anonymous in Solidity source. Per the EVM ABI, anonymous events suppress the keccak256(signature) topic0 slot so they can carry up to 4 indexed topics (vs. 3 for non-anonymous).

Trait Implementations§

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impl Clone for EventSignature

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fn clone(&self) -> EventSignature

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

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

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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 Eq for EventSignature

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impl PartialEq for EventSignature

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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 StructuralPartialEq for EventSignature

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impl<T> Any for T
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Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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where Self: Binary,

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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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