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import config from "$config";
import { g, s } from "$lib/db";
import { l } from "$lib/logging";
import { fail } from "$lib/utils";
import { finalizeEvent, getPublicKey, nip19 } from "nostr-tools";
import { AbstractSimplePool } from "nostr-tools/abstract-pool";
import { Relay } from "nostr-tools/relay";
export const serverPubkey = getPublicKey(
nip19.decode(config.nostrKey).data as Uint8Array,
);
const alwaysTrue: any = (t: Event) => {
t[Symbol("verified")] = true;
return true;
};
export const pool = new AbstractSimplePool({ verifyEvent: alwaysTrue });
const opts = { maxWait: 2000 };
export const anon = (pubkey) => ({
name: pubkey.substr(0, 6),
pubkey,
anon: true,
follows: [],
followers: [],
});
export async function send(ev, url = config.nostr) {
if (!ev?.id) return;
const r = await Relay.connect(url);
await r.publish(ev);
r.close();
}
export async function handleZap(invoice) {
const pubkey = serverPubkey;
const sk = nip19.decode(config.nostrKey).data as Uint8Array;
const zapreq = JSON.parse(invoice.description);
if (!zapreq.tags || zapreq.tags.length === 0) {
fail("No tags found");
}
const ptags = zapreq.tags.filter(
(t) => t?.length && t.length >= 2 && t[0] === "p",
);
if (ptags.length !== 1) {
fail("None or multiple p tags found");
}
const etags = zapreq.tags.filter(
(t) => t?.length && t.length >= 2 && t[0] === "e",
);
if (!(etags.length === 0 || etags.length === 1)) {
fail("Expected none or 1 e tags");
}
const relays_tag = zapreq.tags.find(
(t) => t?.length && t.length >= 2 && t[0] === "relays",
);
if (!relays_tag) {
fail("No relays tag found");
}
const relays = relays_tag.slice(1).filter((r) => r?.startsWith("ws"));
const etag = etags.length > 0 && etags[0];
const ptag = ptags[0];
const kind = 9735;
const created_at = invoice.paid_at;
const content = zapreq.content;
const tags = [ptag];
if (etag) tags.push(etag);
tags.push(["bolt11", invoice.bolt11]);
tags.push(["description", invoice.description]);
tags.push(["preimage", invoice.payment_preimage]);
const ev = { pubkey, kind, created_at, content, tags };
const signed = await finalizeEvent(ev, sk);
l("sending receipt");
await Promise.allSettled(
relays.map(async (url) => {
const r = await Relay.connect(url);
await r.publish(signed);
r.close();
}),
);
}
export const getRelays = async (pubkey): Promise<any> => {
const { relays } = config;
const filter = { authors: [pubkey], kinds: [10002] };
const event = await pool.get([config.nostr], filter, opts);
let read = relays;
let write = relays;
if (event) {
read = [];
write = [];
for (const r of event.tags) {
if (r[0] !== "r") continue;
if (!r[2] || r[2] === "write") write.push(r[1]);
if (!r[2] || r[2] === "read") read.push(r[1]);
}
} else
pool
.get(relays, filter)
.then(send)
.catch(() => {});
return { read, write };
};
export const getProfile = async (pubkey, relays = [config.nostr]) => {
let profile = await g(`${pubkey}:profile`);
if (!profile) {
const pubkeys = [pubkey];
let filter: any = { authors: pubkeys, kinds: [0] };
let ev = await pool.get(relays, filter, opts);
if (!ev) {
({ write: relays } = await getRelays(pubkey));
ev = await pool.get(relays, filter, opts);
}
if (!ev) {
filter = { cache: ["user_infos", { pubkeys }] };
ev = (await pool.querySync([config.cache], filter, opts)).find(
(e) => e.kind === 0,
);
}
if (ev) {
send(ev);
profile = JSON.parse(ev.content);
} else {
profile = anon(pubkey);
}
}
await s(`${pubkey}:profile`, profile);
return profile;
};
export const getCount = async (pubkey) => {
let follows = await g(`${pubkey}:follows:n`);
let followers = await g(`${pubkey}:followers:n`);
if (follows === null) {
const filter: any = { kinds: [3], authors: [pubkey] };
let ev = await pool.get([config.nostr], filter, opts);
if (!ev) {
let { relays } = config;
({ write: relays } = await getRelays(pubkey));
ev = await pool.get(relays, filter, opts);
send(ev);
}
if (ev) {
follows = ev.tags
.map((t) => t[0] === "p" && t[1])
.filter((p) => p && p.length === 64).length;
}
follows ||= 0;
await s(`${pubkey}:follows:n`, follows);
}
if (followers === null) {
const filter: any = { cache: ["user_infos", { pubkeys: [pubkey] }] };
const infos = await pool.querySync([config.cache], filter, opts);
const f = infos.find((e) => e.kind === 10000133);
let counts = {};
if (f?.content) {
counts = JSON.parse(f.content);
followers = counts[pubkey];
}
followers ||= 0;
await s(`${pubkey}:followers:n`, followers);
}
return { follows, followers };
};
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