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import { g, s } from "$lib/db";
import { err, warn } from "$lib/logging";
import { bail, getUser, fail } from "$lib/utils";
import { v4 } from "uuid";
import got from "got";
import { generate } from "$lib/invoices";
import { bech32 } from "bech32";
import { types } from "$lib/payments";
import { serverPubkey } from "$lib/nostr";
const { URL } = process.env;
const host = URL.split("/").at(-1);
export default {
async encode(req, res) {
const {
query: { address },
} = req;
const [name, domain] = address.split("@");
const url = `https://${domain}/.well-known/lnurlp/${name}`;
try {
const r = await got(url).json();
if (r.tag !== "payRequest") fail("not an ln address");
} catch (e) {
const m = `failed to lookup lightning address ${address}`;
warn(m);
return bail(res, m);
}
const enc = bech32.encode("lnurl", bech32.toWords(Buffer.from(url)), 20000);
res.send(enc);
},
async decode(req, res) {
const {
query: { text },
} = req;
try {
const url = Buffer.from(
bech32.fromWords(bech32.decode(text, 20000).words),
).toString();
res.send(await got(url).json());
} catch (e) {
bail(res, e.message);
}
},
async lnurlp(req, res) {
const {
params: { username },
query: { minSendable = 1000, maxSendable = 100000000000 },
} = req;
try {
const { id: uid } = await getUser(username);
const metadata = JSON.stringify([
["text/plain", `Paying ${username}@${host}`],
["text/identifier", `${username}@${host}`],
]);
const id = v4();
await s(`lnurl:${id}`, uid);
res.send({
allowsNostr: true,
minSendable,
maxSendable,
metadata,
nostrPubkey: serverPubkey,
commentAllowed: 512,
callback: `${URL}/api/lnurl/${id}`,
tag: "payRequest",
});
} catch (e) {
warn("problem generating lnurlp request", username, e.message);
bail(res, e.message);
}
},
async lnurl(req, res) {
const {
params: { id },
query: { amount, comment, nostr },
} = req;
try {
const uid = await g(`lnurl:${id}`);
const user = await getUser(uid);
if (!user) fail("user not found");
let { username } = user;
username = username.replace(/\s/g, "").toLowerCase();
const memo = `Paying ${username}@${host}`;
let metadata = JSON.stringify([
["text/plain", memo],
["text/identifier", `${username}@${host}`],
]);
if (nostr) {
try {
const event = JSON.parse(decodeURIComponent(nostr));
// TODO: validate the event
await s(`zap:${id}`, event);
metadata = nostr;
} catch (e) {
err("problem handling zap", e.message);
}
}
const { id: iid, text: pr } = await generate({
invoice: {
amount: Math.round(amount / 1000),
memo: metadata,
type: types.lightning,
},
user,
});
res.send({ pr, routes: [], verify: `${URL}/api/lnurl/verify/${iid}` });
} catch (e) {
bail(res, e.message);
}
},
async verify(req, res) {
const {
params: { id },
} = req;
const inv = await g(`invoice:${id}`);
if (!inv) return res.send({ status: "ERROR", reason: "Not found" });
const { received, amount, preimage } = inv;
const settled = received >= amount;
res.send({ status: "OK", settled, preimage });
},
};
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