vapor-docs/3.0/docs/async/getting-started.md

Using Async

Async is a library revolving around two main concepts:

• Promises and Futures
• (Reactive) Streams
• EventLoops

Together they form the foundation of Vapor 3's data flow.

With Vapor

This package is included with Vapor by default, just add:

import Async

Without Vapor

Async is a powerful library for any Swift project. To include it in your package, add the following to your Package.swift file.

// swift-tools-version:4.0
import PackageDescription

let package = Package(
    name: "Project",
    dependencies: [
        ...
        .package(url: "https://github.com/vapor/async.git", .revision("beta")),
    ],
    targets: [
      .target(name: "Project", dependencies: ["Async", ... ])
    ]
)

Use import Async to access Async's APIs.