gistfile1.txt

//import swan.
const swan = require('@swan-bitcoin/xpub-lib');

export async function onRequestGet(context) {
    //build the paramaters
    const {
        request, // same as existing Worker API
        env, // same as existing Worker API
        params, // if filename includes [id] or [[path]]
        waitUntil, // same as ctx.waitUntil in existing Worker API
        next, // used for middleware or to fetch assets
        data, // arbitrary space for passing data between middlewares
    } = context;

    const xpub = "xpub6CatWdiZiodmUeTDp8LT5or8nmbKNcuyvz7WyksVFkKB4RHwCD3XyuvPEbvqAQY3rAPshWcMLoP2fMFMKHPJ4ZeZXYVUhLv1VMrjPC7PW6V"
    let address = swan.addressFromExtPubKey({ extPubKey: xpub, network: "mainnet" })
    return new Response(JSON.stringify({ "address": address }), { status: 200 });
}