Twitch

OAuth 2.0 provider for Twitch.

Also see the OAuth 2.0 guide.

Initialization

import { Twitch } from "arctic";

const twitch = new Twitch(clientId, clientSecret, redirectURI);

Create authorization URL

import { generateState } from "arctic";

const state = generateState();
const scopes = ["activity:write", "read"];
const url = twitch.createAuthorizationURL(state, scopes);

Validate authorization code

validateAuthorizationCode() will either return an OAuth2Tokens, or throw one of OAuth2RequestError, ArcticFetchError, or a standard Error (parse errors). Twitch returns an access token, the access token expiration, and a refresh token.

import { OAuth2RequestError, ArcticFetchError } from "arctic";

try {
	const tokens = await twitch.validateAuthorizationCode(code);
	const accessToken = tokens.accessToken();
	const accessTokenExpiresAt = tokens.accessTokenExpiresAt();
	const refreshToken = tokens.refreshToken();
} catch (e) {
	if (e instanceof OAuth2RequestError) {
		// Invalid authorization code, credentials, or redirect URI
		const code = e.code;
		// ...
	}
	if (e instanceof ArcticFetchError) {
		// Failed to call `fetch()`
		const cause = e.cause;
		// ...
	}
	// Parse error
}

Refresh access tokens

Use refreshAccessToken() to get a new access token using a refresh token. Twitch returns the same values as during the authorization code validation. This method also returns OAuth2Tokens and throws the same errors as validateAuthorizationCode()

import { OAuth2RequestError, ArcticFetchError } from "arctic";

try {
	const tokens = await twitch.refreshAccessToken(refreshToken);
	const accessToken = tokens.accessToken();
	const accessTokenExpiresAt = tokens.accessTokenExpiresAt();
	const refreshToken = tokens.refreshToken();
} catch (e) {
	if (e instanceof OAuth2RequestError) {
		// Invalid authorization code, credentials, or redirect URI
	}
	if (e instanceof ArcticFetchError) {
		// Failed to call `fetch()`
	}
	// Parse error
}

Get user profile

Use the /users endpoint without passing any arguments. The user:read:email scope is required to get the user's email from the endpoint.

const response = await fetch("https://api.twitch.tv/helix/users", {
	headers: {
		Authorization: `Bearer ${accessToken}`,
		"Client-Id": clientId
	}
});
const user = await response.json();