commit eeb38115856e29d4b0eba9290123cbaaf767c41c
parent d643e2d06b2d5e9ee2dae8304ab00f0b3d528910
Author: William Casarin <jb55@jb55.com>
Date: Mon, 14 Nov 2022 18:05:37 -0800
web: bump explore timeline pow target to 25
It's much harder to spam at this level
Diffstat:
2 files changed, 75 insertions(+), 7 deletions(-)
diff --git a/web/index.html b/web/index.html
@@ -8,11 +8,11 @@
<link rel="stylesheet" href="css/responsive.css?v=8">
<link rel="stylesheet" href="css/fontawesome.css?v=2">
<script defer src="js/ui/util.js?v=5"></script>
- <script defer src="js/ui/render.js?v=6"></script>
+ <script defer src="js/ui/render.js?v=7"></script>
<script defer src="js/noble-secp256k1.js?v=1"></script>
<script defer src="js/bech32.js?v=1"></script>
<script defer src="js/nostr.js?v=6"></script>
- <script defer src="js/damus.js?v=78"></script>
+ <script defer src="js/damus.js?v=79"></script>
</head>
<body>
<script>
diff --git a/web/js/damus.js b/web/js/damus.js
@@ -62,6 +62,7 @@ function init_home_model() {
explore: {
...init_timeline('explore'),
seen: new Set(),
+ pow: 25, // pow difficulty target
}
},
deleted: {},
@@ -271,6 +272,8 @@ function process_event(model, ev)
const notified = was_pubkey_notified(model.pubkey, ev)
ev.notified = notified
+ ev.pow = calculate_pow(ev)
+
if (ev.kind === 7)
process_reaction_event(model, ev)
else if (ev.kind === 42 && ev.refs && ev.refs.root)
@@ -315,15 +318,18 @@ function should_add_to_timeline(ev)
return ev.kind === 1 || ev.kind === 42 || ev.kind === 6
}
-function should_add_to_explore_timeline(view, ev)
+function should_add_to_explore_timeline(contacts, view, ev)
{
if (!should_add_to_timeline(ev))
return false
if (view.seen.has(ev.pubkey))
return false
-
- return true
+
+ if (contacts.friend_of_friends.has(ev.pubkey))
+ return true
+
+ return ev.pow >= view.pow
}
function get_current_view()
@@ -354,7 +360,7 @@ function handle_home_event(ids, model, relay, sub_id, ev) {
case ids.explore:
const view = model.views.explore
- if (should_add_to_explore_timeline(view, ev)) {
+ if (should_add_to_explore_timeline(model.contacts, view, ev)) {
view.seen.add(ev.pubkey)
insert_event_sorted(view.events, ev)
}
@@ -621,15 +627,77 @@ function fetch_referenced_events(refevents_id, model, relay) {
model.pool.subscribe(refevents_id, [filter], relay)
}
+function zero_bits(b)
+{
+ let n = 0;
+
+ if (b == 0)
+ return 8;
+
+ while (b >>= 1)
+ n++;
+
+ return 7-n;
+}
+
+function leading_zero_bits(id)
+{
+ const buf = nostrjs.hex_decode(id)
+
+ let i
+ for (i = 0, total = 0; i < 32; i++) {
+ bits = zero_bits(buf[i])
+ total += bits
+ if (bits != 8)
+ break
+ }
+
+ return total
+}
+
+function min(a, b) {
+ return a < b ? a : b;
+}
+
+function difficulty_to_prefix(d)
+{
+ const n = Math.floor(d / 4)
+ let s = ""
+ for (i = 0; i < n; i++) {
+ s += "0"
+ }
+ return s
+}
+
+function calculate_pow(ev)
+{
+ const id_bits = leading_zero_bits(ev.id)
+ for (const tag of ev.tags) {
+ if (tag.length >= 3 && tag[0] === "nonce") {
+ const target = +tag[2]
+ if (isNaN(target))
+ return 0
+
+ // if our nonce target is smaller than the difficulty,
+ // then we use the nonce target as the actual difficulty
+ return min(target, id_bits)
+ }
+ }
+
+ // not a valid pow if we don't have a difficulty target
+ return 0
+}
+
function handle_profiles_loaded(ids, model, view, relay) {
// stop asking for profiles
model.pool.unsubscribe(ids.profiles, relay)
redraw_events(model, view)
redraw_my_pfp(model)
+ const prefix = difficulty_to_prefix(view.pow)
const fofs = Array.from(model.contacts.friend_of_friends)
let explore_filters = [
- {kinds: [1,42], ids: ["00000"], limit: 200}
+ {kinds: [1,42], ids: [prefix], limit: 200}
]
if (fofs.length > 0) {
