feat: gossip model

packages/app/src/Hooks/useRelaysForFollows.tsx

@@ -1,65 +0,0 @@
-import { HexKey } from "@snort/nostr";
-import { useMemo } from "react";
-import { FollowsRelays } from "State/Relays";
-import { unwrap } from "Util";
-
-export type RelayPicker = ReturnType<typeof useRelaysForFollows>;
-
-/**
- * Number of relays to pick per pubkey
- */
-const PickNRelays = 2;
-
-export default function useRelaysForFollows(keys: Array<HexKey>) {
-  return useMemo(() => {
-    if (keys.length === 0) {
-      return {};
-    }
-
-    const allRelays = keys.map(a => {
-      return {
-        key: a,
-        relays: FollowsRelays.snapshot.get(a),
-      };
-    });
-
-    const missing = allRelays.filter(a => a.relays === undefined);
-    const hasRelays = allRelays.filter(a => a.relays !== undefined);
-    const relayUserMap = hasRelays.reduce((acc, v) => {
-      for (const r of unwrap(v.relays)) {
-        if (!acc.has(r.url)) {
-          acc.set(r.url, new Set([v.key]));
-        } else {
-          unwrap(acc.get(r.url)).add(v.key);
-        }
-      }
-      return acc;
-    }, new Map<string, Set<HexKey>>());
-    const topRelays = [...relayUserMap.entries()].sort(([, v], [, v1]) => v1.size - v.size);
-
-    // <relay, key[]> - count keys per relay
-    // <key, relay[]> - pick n top relays
-    // <relay, key[]> - map keys per relay (for subscription filter)
-
-    const userPickedRelays = keys.map(k => {
-      // pick top 3 relays for this key
-      const relaysForKey = topRelays
-        .filter(([, v]) => v.has(k))
-        .slice(0, PickNRelays)
-        .map(([k]) => k);
-      return { k, relaysForKey };
-    });
-
-    const pickedRelays = new Set(userPickedRelays.map(a => a.relaysForKey).flat());
-
-    const picked = Object.fromEntries(
-      [...pickedRelays].map(a => {
-        const keysOnPickedRelay = new Set(userPickedRelays.filter(b => b.relaysForKey.includes(a)).map(b => b.k));
-        return [a, [...keysOnPickedRelay]];
-      })
-    );
-    picked[""] = missing.map(a => a.key);
-    console.debug(picked);
-    return picked;
-  }, [keys]);
-}