Struct PromiseIndex 

pub struct PromiseIndex(/* private fields */);

Promise index that is computed only once. It is an internal index that identifies a specific promise (or a sequence of promises) created during the execution of a smart contract. Returned by promise_create and can be used to refer this promise in promise_then, promise_batch_create, and other functions. Example:

use near_sdk::{env, Gas, AccountId, NearToken};
use std::str::FromStr;

let promise_id = env::promise_create(
    AccountId::from_str("a.near").unwrap(), "new", b"{}", NearToken::from_yoctonear(0),
    Gas::from_tgas(1)
);
env::promise_then(
    promise_id, AccountId::from_str("b.near").unwrap(), "callback", b"{}", NearToken::from_yoctonear(0),
    Gas::from_tgas(1)
);

Trait Implementations

impl Clone for PromiseIndex

fn clone(&self) -> PromiseIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PromiseIndex

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

Formats the value using the given formatter.

impl Hash for PromiseIndex

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

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 Ord for PromiseIndex

fn cmp(&self, other: &PromiseIndex) -> 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.

impl PartialEq for PromiseIndex

fn eq(&self, other: &PromiseIndex) -> 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 PartialOrd for PromiseIndex

fn partial_cmp(&self, other: &PromiseIndex) -> 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 Copy for PromiseIndex

impl Eq for PromiseIndex

impl StructuralPartialEq for PromiseIndex