Struct Predicate 

pub struct Predicate { /* private fields */ }

Represents the predicates set by a subscriber to match the Subscription to an event.

Implementations

impl Predicate

pub fn new(topic: impl Into<String>) -> Self

Instantiate a new Predicate with a topic.

Arguments

• topic - The topic the subscription listens to.

Returns

• Predicate - A new instance of Predicate

pub fn new_with_event_account( topic: impl Into<String>, event_account: Pubkey, ) -> Self

Create a new predicate with a topic and event account.

Arguments

• topic - The topic the subscription listens to.
• event_account - The account that stores the event data.

Returns

• Predicate - A new instance of Predicate

pub fn new_with_optional_event_account( topic: impl Into<String>, event_account: Option<Pubkey>, ) -> Self

Create a new predicate with a topic and optional event account.

Arguments

• topic - The topic the subscription listens to.
• event_account - An optional account that stores the event data.

Returns

• Predicate - A new instance of Predicate

pub fn new_with_timestamp_range(range: Range<u64>) -> Self

Create a new predicate for a timestamp range.

The topic is set to the clock topic and the event account is set to the clock sysvar account.

Arguments

• range - A range representing the timestamp range in milliseconds. The start is inclusive, and the end is exclusive.

Returns

• Predicate - A new instance of Predicate

pub fn topic(&self) -> &str

Get the topic of the predicate.

pub fn event_account(&self) -> Option<Pubkey>

Get the event account of the predicate, if any.

pub fn timestamp_range(&self) -> Option<TimestampRange>

Get the timestamp range of the predicate, if any.

Trait Implementations

impl Clone for Predicate

fn clone(&self) -> Predicate

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Predicate

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Predicate

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Predicate

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for Predicate

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Predicate

impl StructuralPartialEq for Predicate