inngest/helpers/assertions.js

Official SDK for Inngest.com. Inngest is the reliability layer for modern applications. Inngest combines durable execution, events, and queues into a zero-infra platform with built-in observability.

import { headerKeys } from "./consts.js";
import { InngestFunction } from "../components/InngestFunction.js";
import { Inngest } from "../components/Inngest.js";

//#region src/helpers/assertions.ts
/**
* While developers can often use `instanceof` to check if an object is a class
* instance, this is not always reliable, especially when dealing with objects
* that may have been created in different execution contexts or across
* different versions of the library.
*
* This module provides a set of type guards that use `*.Like` interfaces to
* recognize the objects instead of any other typing.
*
* These can be used internally and externally.
*
* @module
*/
/**
* Asserts that the given `input` is an `Inngest` object.
*/
const isInngest = (input) => {
	return input[Symbol.toStringTag] === Inngest.Tag;
};
/**
* Asserts that the given `input` is an `InngestFunction` object.
*/
const isInngestFunction = (input) => {
	return input[Symbol.toStringTag] === InngestFunction.Tag;
};
/**
* Asserts that the given `input` is a request originating from Inngest.
*/
const isInngestRequest = (input) => {
	try {
		const runId = input.headers.get(headerKeys.InngestRunId);
		const signature = input.headers.get(headerKeys.Signature);
		return Boolean(runId && typeof signature === "string");
	} catch {
		return false;
	}
};

//#endregion
export { isInngest, isInngestFunction, isInngestRequest };
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