An example CloudFlare Function for fetching data from Stargaze GraphQL API

cloud_flare_func.js

import { error, json, Router, createCors } from 'itty-router';
import { ApolloClient, InMemoryCache, gql } from '@apollo/client';
const { preflight, corsify } = createCors();

const client = new ApolloClient({
	uri: 'https://graphql.mainnet.stargaze-apis.com/graphql',
	cache: new InMemoryCache(),
});

export const getTraitsAndOwner = (collectionAddr, tokenId) =>
	client.query({
		query: gql`
			query Query {
			  token(collectionAddr: "${collectionAddr}", tokenId: "${tokenId}") {
			    traits {
			      name
			      value
			    }
			  }
			}
  		`,
	});

const router = Router();

router.all('*', preflight);
router.get('/check/:collectionAddr/:tokenId', async (request) => {
	const { collectionAddr, tokenId } = request.params;
	const response = await getTraitsAndOwner(collectionAddr, tokenId);
	return corsify(json(response));
});

export default {
	fetch: (req, env, ctx) => router.handle(req, env, ctx).then(json).catch(error),
};