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@endo/promise-kit
Advanced tools
The promise-kit package provides a simple abstraction for creating and managing a promise. It exports, makePromiseKit
which is a utility function used to create a Promise and its associated resolver and rejector functions. This is particularly useful in asynchronous programming, where you might need to create a promise and resolve or reject it at a later point in time.
Note that this serves as a "ponyfill" for Promise.withResolvers
, making certain accommodations to ensure that the resulting promises can pipeline messages through @endo/eventual-send
.
Here’s an example of how makePromiseKit
might be used in an Agoric smart contract or JavaScript program:
import { makePromiseKit } from '@endo/promise-kit';
function asyncOperation() {
const { promise, resolve, reject } = makePromiseKit();
setTimeout(() => {
const success = true; // Simulating success or failure
if (success) {
resolve("Operation successful!");
} else {
reject("Operation failed!");
}
}, 2000);
return promise;
}
async function handleAsyncOperation() {
try {
const result = await asyncOperation();
console.log(result); // "Operation successful!"
} catch (error) {
console.error(error); // "Operation failed!"
}
}
handleAsyncOperation();
You can create multiple promise kits for managing various asynchronous tasks.
const kit1 = makePromiseKit();
const kit2 = makePromiseKit();
kit1.promise.then(value => console.log('Kit 1 resolved with:', value));
kit2.promise.then(value => console.log('Kit 2 resolved with:', value));
kit1.resolve('First success');
kit2.resolve('Second success');
makePromiseKit()
Creates a new promise kit.
Returns
promise
: The promise object.resolve
: The resolve function for the promise.reject
: The reject function for the promise.This package is licensed under the Apache-2.0 License.
FAQs
Helper for making promises
The npm package @endo/promise-kit receives a total of 6,992 weekly downloads. As such, @endo/promise-kit popularity was classified as popular.
We found that @endo/promise-kit demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 5 open source maintainers collaborating on the project.
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