hide note by pow difficulty

src/app/views/UserContent.svelte

@@ -77,6 +77,16 @@
         score. Notes from accounts with a lower score will be automatically hidden.
       </p>
     </Field>
+    <Field>
+      <div slot="label" class="flex justify-between">
+        <strong>Minimum PoW</strong>
+        <div>{values.min_pow_difficulty}</div>
+      </div>
+      <Input type="range" bind:value={values.min_pow_difficulty} step="4" min={0} max={32} />
+      <p slot="info">
+        Select a minimum proof-of-work difficulty. Notes with a lower Web Of Trust and PoW difficulty will be hidden.
+      </p>
+    </Field>
     <Field label="Muted accounts">
       <PersonSelect multiple bind:value={mutedPubkeys} />
       <p slot="info">Notes from these people will be hidden by default.</p>

src/engine/state.ts

@@ -104,6 +104,7 @@ import {
   normalizeRelayUrl,
   readList,
   getReplyTagValues,
+  getTag,
 } from "@welshman/util"
 import Fuse from "fuse.js"
 import {batch, doPipe, seconds} from "hurdak"
@@ -269,6 +270,7 @@ export const defaultSettings = {
   hide_sensitive: true,
   report_analytics: true,
   min_wot_score: 0,
+  min_pow_difficulty: 0,
   enable_client_tag: false,
   auto_authenticate: false,
   note_actions: ["zaps", "replies", "reactions", "recommended_apps"],
@@ -356,6 +358,7 @@ export const isEventMuted = withGetter(
     ([$userMutes, $userFollows, $userSettings, $pubkey]) => {
       const words = $userSettings.muted_words
       const minWot = $userSettings.min_wot_score
+      const minPow = $userSettings.min_pow_difficulty
       const regex =
         words.length > 0
           ? new RegExp(`\\b(${words.map(w => w.toLowerCase().trim()).join("|")})\\b`)
@@ -376,8 +379,11 @@ export const isEventMuted = withGetter(
         if (strict || $userFollows.has(e.pubkey)) return false
 
         const wotScore = getUserWotScore(e.pubkey)
+        const powDifficulty = Number(getTag("nonce", e.tags)?.[2] || "0")
 
-        return wotScore < minWot
+        const isValidPow = e.id.startsWith("0".repeat(Math.ceil(powDifficulty / 4)))
+
+        return wotScore < minWot && (powDifficulty < minPow || !isValidPow)
       }
     },
   ),