Struct Topic 

pub struct Topic { /* private fields */ }

A 32-byte topic used for event indexing. Topics are prepended to the serialized event data. The num_topics field indicates how many of the leading 32-byte chunks are topics (up to kMaxTopics). Downstream indexers use topics to efficiently filter events without deserializing.

Implementations

impl Topic

pub fn into_inner(self) -> [u8; 32]

pub const fn new(_inner: [u8; 32]) -> Topic

Trait Implementations

impl AsRef<[u8]> for Topic

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for Topic

fn clone(&self) -> Topic

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ConstMaxSize for Topic

const MAX_SIZE: Option<usize>

Worst-case CXS encoded size in bytes, or None if unbounded.

impl ConstMaxSize for Topic

const MAX_SIZE: Option<usize>

Worst-case TXS encoded size in bytes, or None if unbounded.

impl Copy for Topic

impl Debug for Topic

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

Formats the value using the given formatter.

impl Default for Topic

fn default() -> Topic

Returns the “default value” for a type.

impl Deref for Topic

type Target = [u8; 32]

The resulting type after dereferencing.

fn deref(&self) -> &<Topic as Deref>::Target

Dereferences the value.

impl DerefMut for Topic

fn deref_mut(&mut self) -> &mut <Topic as Deref>::Target

Mutably dereferences the value.

impl EncodesAs<Topic> for Topic

impl Eq for Topic

impl<'a> From<&'a [u8; 32]> for &'a Topic

fn from(arr: &[u8; 32]) -> &'a Topic

Converts to this type from the input type.

impl From<[u8; 32]> for Topic

fn from(_inner: [u8; 32]) -> Topic

Converts to this type from the input type.

impl Hash for Topic

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

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl JsonSchema for Topic

Available on crate feature schema only.

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn json_schema(_gen: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

impl Ord for Topic

fn cmp(&self, other: &Topic) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Topic

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Topic

fn partial_cmp(&self, other: &Topic) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'_r> ReadXDR<'_r> for Topic

fn read_xdr<R>(r: &mut R) -> Result<Topic, ReadError>

where R: Reader<'_r>,

Reads an XDR value from the reader.

fn read_xdr_in_place<R, '__xdrs_s>( r: &mut R, __xdrs_slot: Slot<'__xdrs_s, Topic>, ) -> Result<Init<'__xdrs_s, Topic>, ReadError>

where R: Reader<'_r>,

Reads an XDR value directly into slot, without first building it on the stack.

impl<'r, 'a> ReadXDR<'r> for &'a Topic

where 'r: 'a,

Available on crate feature xdrs only.

fn read_xdr<R>(r: &mut R) -> Result<&'a Topic, ReadError>

where R: Reader<'r>,

Reads an XDR value from the reader.

fn read_xdr_in_place<'s, R>( r: &mut R, slot: Slot<'s, Self>, ) -> Result<Init<'s, Self>, ReadError>

where R: Reader<'r>,

Reads an XDR value directly into slot, without first building it on the stack.

impl StructuralPartialEq for Topic

impl WriteXDR for Topic

fn write_xdr<F, W>(&self, w: &mut W) -> Result<(), WriteError>

where W: Writer<F>,

Writes this value as XDR data to the writer.

unsafe fn write_xdr_unchecked<F, W>(&self, w: &mut W)

where W: WriterUnchecked<F>,

Writes this value as XDR data to the writer, without runtime checks.