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web: bump explore timeline pow target to 25

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It's much harder to spam at this level
This commit is contained in:
William Casarin 2022-11-14 18:05:37 -08:00
parent d643e2d06b
commit eeb3811585
2 changed files with 75 additions and 7 deletions
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4
web/index.html
View file

@ -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>

74
web/js/damus.js
View file

@ -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)
@ -315,7 +318,7 @@ 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
@ -323,7 +326,10 @@ function should_add_to_explore_timeline(view, ev)
if (view.seen.has(ev.pubkey))
return false
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) {