Add projection utility and type

.fdignore

@@ -2,4 +2,5 @@ node_modules
 docs
 docs/reference
 docs/.vitepress/cache
+dist
 build

.gitignore

@@ -9,3 +9,4 @@ results
 *.tsbuildinfo
 .vscode
 docs/**/*.html
+.local

packages/client/.eslintignore

@@ -0,0 +1,3 @@
+build
+normalize-url
+__tests__

packages/client/package.json

@@ -0,0 +1,51 @@
+{
+  "name": "@welshman/client",
+  "version": "0.8.13",
+  "author": "hodlbod",
+  "license": "MIT",
+  "description": "An instance-based, composable client for building nostr applications",
+  "publishConfig": {
+    "access": "public"
+  },
+  "type": "module",
+  "main": "dist/client/src/index.js",
+  "types": "dist/client/src/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "pnpm run clean && pnpm run compile --force",
+    "clean": "rimraf ./dist",
+    "compile": "tsc -b tsconfig.build.json",
+    "prepublishOnly": "pnpm run build"
+  },
+  "dependencies": {
+    "fuse.js": "^7.0.0",
+    "throttle-debounce": "^5.0.2"
+  },
+  "peerDependencies": {
+    "@pomade/core": "^0.2.1",
+    "@welshman/feeds": "workspace:*",
+    "@welshman/lib": "workspace:*",
+    "@welshman/net": "workspace:*",
+    "@welshman/router": "workspace:*",
+    "@welshman/signer": "workspace:*",
+    "@welshman/store": "workspace:*",
+    "@welshman/util": "workspace:*",
+    "svelte": "^4.0.0 || ^5.0.0"
+  },
+  "devDependencies": {
+    "rimraf": "~6.0.0",
+    "typescript": "~5.8.0",
+    "@pomade/core": "^0.2.1",
+    "@types/throttle-debounce": "^5.0.2",
+    "@welshman/feeds": "workspace:*",
+    "@welshman/lib": "workspace:*",
+    "@welshman/net": "workspace:*",
+    "@welshman/router": "workspace:*",
+    "@welshman/signer": "workspace:*",
+    "@welshman/store": "workspace:*",
+    "@welshman/util": "workspace:*",
+    "svelte": "^5.39.12"
+  }
+}

packages/client/src/blockedRelayLists.ts

@@ -0,0 +1,60 @@
+import {
+  BLOCKED_RELAYS,
+  asDecryptedEvent,
+  readList,
+  getRelaysFromList,
+  makeList,
+  makeEvent,
+  addToListPublicly,
+  removeFromList,
+} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {DerivedData} from "./clientData.js"
+import {Network} from "./network.js"
+import {Router} from "./router.js"
+import {User} from "./user.js"
+import {Thunks} from "./thunk.js"
+import type {IClient} from "./client.js"
+
+/**
+ * Kind-10006 blocked-relay lists, keyed by pubkey. Loaded via the outbox model,
+ * so it depends on the relay-list collection. Feeds `RelayStats.getQuality` so
+ * blocked relays are never selected.
+ */
+export class BlockedRelayLists extends DerivedData<ReturnType<typeof readList>> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [BLOCKED_RELAYS]}],
+      eventToItem: (event: TrustedEvent) => readList(asDecryptedEvent(event)),
+      getKey: list => list.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    return this.ctx.use(Network).loadUsingOutbox(pubkey, {kinds: [BLOCKED_RELAYS]}, relayHints)
+  }
+
+  getBlockedRelays = (pubkey: string) => getRelaysFromList(this.get(pubkey))
+
+  addRelay = async (url: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: BLOCKED_RELAYS})
+    const event = await addToListPublicly(list, ["relay", url]).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  removeRelay = async (url: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: BLOCKED_RELAYS})
+    const event = await removeFromList(list, url).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  setRelays = (urls: string[]) =>
+    this.ctx.use(Thunks).publish({
+      event: makeEvent(BLOCKED_RELAYS, {tags: urls.map(url => ["relay", url])}),
+      relays: this.ctx.use(Router).FromUser().getUrls(),
+    })
+}

packages/client/src/blossom.ts

@@ -0,0 +1,23 @@
+import {BLOSSOM_SERVERS, asDecryptedEvent, readList} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {DerivedData} from "./clientData.js"
+import {Network} from "./network.js"
+import type {IClient} from "./client.js"
+
+/**
+ * Blossom server lists (kind 10063), keyed by pubkey. Loaded via the outbox
+ * model (the author's write relays), so it depends on the relay-list collection.
+ */
+export class BlossomServerLists extends DerivedData<ReturnType<typeof readList>> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [BLOSSOM_SERVERS]}],
+      eventToItem: (event: TrustedEvent) => readList(asDecryptedEvent(event)),
+      getKey: list => list.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    return this.ctx.use(Network).loadUsingOutbox(pubkey, {kinds: [BLOSSOM_SERVERS]}, relayHints)
+  }
+}

packages/client/src/client.ts

@@ -0,0 +1,92 @@
+import type {Unsubscriber} from "svelte/store"
+import {call} from "@welshman/lib"
+import {Pool, Tracker, Repository, WrapManager} from "@welshman/net"
+import type {NetContext, AdapterFactory} from "@welshman/net"
+import type {User} from "./user.js"
+import type {ClientPolicy} from "./policies.js"
+
+export type ClientConfig = {
+  dufflepudUrl?: string
+  getDefaultRelays?: () => string[]
+  getIndexerRelays?: () => string[]
+  getSearchRelays?: () => string[]
+}
+
+export type ClientOptions = {
+  user?: User
+  config?: ClientConfig
+  getAdapter?: AdapterFactory
+  policies?: ClientPolicy[]
+}
+
+export interface IClient {
+  user?: User
+  config: ClientConfig
+  use: <T>(Ctor: new (ctx: IClient) => T) => T
+  netContext: NetContext
+  pool: Pool
+  tracker: Tracker
+  repository: Repository
+  wrapManager: WrapManager
+}
+
+/**
+ * The core of an application instance. Owns the primitives a single identity
+ * needs (so data never bleeds across sessions) — a private repository, a socket
+ * pool, a tracker, a wrap manager — and a `use` registry that resolves data
+ * modules (including net/store helpers) on demand.
+ */
+export class Client implements IClient {
+  user?: User
+  config: ClientConfig
+  netContext: NetContext
+  pool: Pool
+  tracker: Tracker
+  repository: Repository
+  wrapManager: WrapManager
+
+  private singletons = new Map<Function, unknown>()
+  private unsubscribers: Unsubscriber[] = []
+
+  constructor(options: ClientOptions = {}) {
+    this.user = options.user
+    this.config = options.config ?? {}
+    this.pool = new Pool()
+    this.tracker = new Tracker()
+    this.repository = new Repository()
+    this.wrapManager = new WrapManager({
+      tracker: this.tracker,
+      repository: this.repository,
+    })
+    this.netContext = {
+      pool: this.pool,
+      repository: this.repository,
+      getAdapter: options.getAdapter,
+    }
+
+    for (const policy of options.policies ?? []) {
+      this.unsubscribers.push(policy(this))
+    }
+  }
+
+  // Resolve the per-client singleton of a data module, constructing it on first
+  // use. This is how modules reach their dependencies (e.g. ctx.use(RelayLists)),
+  // replacing constructor injection and letting cycles resolve lazily.
+  use = <T>(Ctor: new (ctx: IClient) => T): T => {
+    let instance = this.singletons.get(Ctor) as T | undefined
+
+    if (!instance) {
+      this.singletons.set(Ctor, (instance = new Ctor(this)))
+    }
+
+    return instance
+  }
+
+  cleanup() {
+    this.unsubscribers.forEach(call)
+    this.pool.clear()
+    this.tracker.clear()
+    this.repository.clear()
+    this.wrapManager.clear()
+  }
+}

packages/client/src/clientData.ts

@@ -0,0 +1,173 @@
+import {writable} from "svelte/store"
+import type {Readable, Unsubscriber} from "svelte/store"
+import type {Maybe} from "@welshman/lib"
+import type {Filter} from "@welshman/util"
+import {deriveItems, getter, makeDeriveItem, makeLoadItem, makeForceLoadItem} from "@welshman/store"
+import type {EventToItem, ItemsByKey, MakeLoadItemOptions} from "@welshman/store"
+import type {IClient} from "./client.js"
+import {Stores} from "./stores.js"
+
+/**
+ * Utility type which allows for using the same value both for hot gets and derived subscriptions
+ */
+export type Projection<T> = {
+  get: () => T
+  $: Readable<T>
+}
+
+export const projection = <T>($: Readable<T>, get = getter($)) => ({$, get})
+
+/**
+ * Base class for a reactive, keyed collection of "local" (non-event) data —
+ * things like relay stats or NIP-11 profiles that aren't backed by the
+ * repository. The collection owns its own map.
+ *
+ * `index` (map) and `all` (values) are `Projection`s — subscribe via `.$`,
+ * snapshot via `.get()`. Per-key access is `one(key)`, a plain on-demand store
+ * (snapshot with svelte's `get(...)`, or read `get(key)` directly).
+ */
+export class ClientData<T> {
+  protected store = writable(new Map<string, T>())
+  index: Projection<ItemsByKey<T>>
+  all: Projection<T[]>
+  one: (key?: string, ...args: any[]) => Readable<Maybe<T>>
+  subs: ((key: string, value: Maybe<T>) => void)[] = []
+
+  constructor(protected readonly ctx: IClient) {
+    this.index = projection(this.store)
+    this.all = projection(deriveItems(this.store))
+    this.one = makeDeriveItem(this.store)
+  }
+
+  keys = () => this.index.get().keys()
+
+  values = () => this.index.get().values()
+
+  get = (key: string) => this.index.get().get(key)
+
+  set = (key: string, value: T) => {
+    this.store.update($items => {
+      $items.set(key, value)
+
+      return $items
+    })
+
+    this.emitItem(key, value)
+  }
+
+  delete = (key: string) => {
+    this.store.update($items => {
+      $items.delete(key)
+
+      return $items
+    })
+
+    this.emitItem(key, undefined)
+  }
+
+  clear = () => {
+    const keys = Array.from(this.index.get().keys())
+
+    this.store.set(new Map())
+
+    for (const key of keys) {
+      this.emitItem(key, undefined)
+    }
+  }
+
+  onItem = (subscriber: (key: string, value: Maybe<T>) => void): Unsubscriber => {
+    this.subs.push(subscriber)
+
+    return () => {
+      const i = this.subs.indexOf(subscriber)
+
+      if (i !== -1) this.subs.splice(i, 1)
+    }
+  }
+
+  protected emitItem = (key: string, value: Maybe<T>) => {
+    for (const subscriber of this.subs) {
+      subscriber(key, value)
+    }
+  }
+}
+
+/**
+ * A `ClientData` collection that knows how to lazily load items by key from the
+ * network. Subclasses implement `fetch`; `load`/`forceLoad`/`one` are derived
+ * from it (with per-key caching and backoff via `makeLoadItem`).
+ */
+export abstract class LoadableData<T> extends ClientData<T> {
+  load: (key: string, ...args: any[]) => Promise<Maybe<T>>
+  forceLoad: (key: string, ...args: any[]) => Promise<Maybe<T>>
+
+  abstract fetch(key: string, ...args: any[]): Promise<unknown>
+
+  constructor(ctx: IClient, options: MakeLoadItemOptions = {}) {
+    super(ctx)
+
+    // Subclasses implement `fetch` as an arrow field, whose initializer runs
+    // *after* super() — so `this.fetch` is undefined here. makeLoadItem captures
+    // its loadItem eagerly, so we defer the lookup to call time via this wrapper.
+    const fetch = (key: string, ...args: any[]) => this.fetch(key, ...args)
+    const read = (key: string) => this.index.get().get(key)
+
+    this.load = makeLoadItem(fetch, read, options)
+    this.forceLoad = makeForceLoadItem(fetch, read)
+    this.one = makeDeriveItem(this.store, this.load)
+  }
+}
+
+export type DerivedDataOptions<T> = {
+  filters: Filter[]
+  eventToItem: EventToItem<T>
+  getKey: (item: T) => string
+  loadOptions?: MakeLoadItemOptions
+}
+
+/**
+ * Base class for a reactive, keyed collection of data derived from nostr events.
+ * The repository is the single source of truth — the collection is a live view
+ * over `ctx.itemsByKey`, never a duplicated map. Subclasses implement `fetch`
+ * (how to load an item by key from the network) and pass the filters/decoder via
+ * `super`.
+ *
+ * `index` (map) and `all` (values) are `Projection`s — subscribe via `.$`,
+ * snapshot via `.get()`. Per-key access is `one(key)`, a plain on-demand store.
+ */
+export abstract class DerivedData<T> {
+  index: Projection<ItemsByKey<T>>
+  all: Projection<T[]>
+  one: (key?: string, ...args: any[]) => Readable<Maybe<T>>
+  load: (key: string, ...args: any[]) => Promise<Maybe<T>>
+  forceLoad: (key: string, ...args: any[]) => Promise<Maybe<T>>
+
+  abstract fetch(key: string, ...args: any[]): Promise<unknown>
+
+  constructor(
+    protected readonly ctx: IClient,
+    options: DerivedDataOptions<T>,
+  ) {
+    const index = ctx.use(Stores).itemsByKey<T>({
+      filters: options.filters,
+      eventToItem: options.eventToItem,
+      getKey: options.getKey,
+    })
+
+    this.index = projection(index)
+    this.all = projection(deriveItems(index))
+
+    const fetch = (key: string, ...args: any[]) => this.fetch(key, ...args)
+    const read = (key: string) => this.index.get().get(key)
+
+    this.load = makeLoadItem(fetch, read, options.loadOptions)
+    this.forceLoad = makeForceLoadItem(fetch, read)
+    this.one = makeDeriveItem(index, this.load)
+  }
+
+  keys = () => this.index.get().keys()
+
+  values = () => this.index.get().values()
+
+  get = (key: string) => this.index.get().get(key)
+}

packages/client/src/createApp.ts

@@ -0,0 +1,14 @@
+import {Client} from "./client.js"
+import type {ClientOptions} from "./client.js"
+import {defaultClientPolicies} from "./policies.js"
+
+/**
+ * Creates a batteries-included client: a `Client` wired with the default client
+ * policies (event ingestion, relay-stats collection, gift-wrap unwrapping).
+ * Reach data modules via `client.use(Profiles)`, `client.use(FollowLists)`, etc.
+ *
+ * For a bare client (no default side effects) construct `new Client(...)`
+ * directly, or pass your own `policies`.
+ */
+export const createApp = (options: ClientOptions = {}) =>
+  new Client({...options, policies: options.policies ?? defaultClientPolicies})

packages/client/src/feeds.ts

@@ -0,0 +1,69 @@
+import {Scope, FeedController} from "@welshman/feeds"
+import type {FeedControllerOptions, Feed} from "@welshman/feeds"
+import type {AdapterContext} from "@welshman/net"
+import type {IClient} from "./client.js"
+import {Router} from "./router.js"
+import {Wot} from "./wot.js"
+
+export type MakeFeedControllerOptions = Partial<Omit<FeedControllerOptions, "feed">> & {feed: Feed}
+
+/**
+ * Builds `FeedController`s wired to this client. Scope/WOT pubkey resolution is
+ * delegated to `Wot`, and feeds fetch through THIS client's net context (pool +
+ * repository) rather than the global one.
+ */
+export class Feeds {
+  constructor(readonly ctx: IClient) {}
+
+  getPubkeysForScope = (scope: Scope): string[] => {
+    const $pubkey = this.ctx.user?.pubkey
+
+    if (!$pubkey) {
+      return []
+    }
+
+    switch (scope) {
+      case Scope.Self:
+        return [$pubkey]
+      case Scope.Follows:
+        return this.ctx.use(Wot).follows($pubkey).get()
+      case Scope.Network:
+        return this.ctx.use(Wot).network($pubkey).get()
+      case Scope.Followers:
+        return this.ctx.use(Wot).followers($pubkey).get()
+      default:
+        return []
+    }
+  }
+
+  getPubkeysForWOTRange = (min: number, max: number): string[] => {
+    const pubkeys = []
+    const $maxWot = this.ctx.use(Wot).max.get() ?? 0
+    const thresholdMin = $maxWot * min
+    const thresholdMax = $maxWot * max
+
+    for (const [tpk, score] of this.ctx.use(Wot).graph.get().entries()) {
+      if (score >= thresholdMin && score <= thresholdMax) {
+        pubkeys.push(tpk)
+      }
+    }
+
+    return pubkeys
+  }
+
+  // The net seam: route feed requests through this client's pool/repository so
+  // feeds fetch through THIS client rather than the global net context.
+  get netContext(): AdapterContext {
+    return {pool: this.ctx.pool, repository: this.ctx.repository}
+  }
+
+  makeFeedController = (options: MakeFeedControllerOptions) =>
+    new FeedController({
+      router: this.ctx.use(Router),
+      getPubkeysForScope: this.getPubkeysForScope,
+      getPubkeysForWOTRange: this.getPubkeysForWOTRange,
+      signer: this.ctx.user?.signer,
+      context: this.netContext,
+      ...options,
+    })
+}

packages/client/src/follows.ts

@@ -0,0 +1,48 @@
+import {
+  FOLLOWS,
+  asDecryptedEvent,
+  readList,
+  makeList,
+  addToListPublicly,
+  removeFromList,
+} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {DerivedData} from "./clientData.js"
+import {Network} from "./network.js"
+import {Thunks} from "./thunk.js"
+import {User} from "./user.js"
+import type {IClient} from "./client.js"
+
+/**
+ * Kind-3 follow lists, keyed by pubkey. Loaded via the outbox model (the
+ * author's write relays), so it depends on the relay-list collection.
+ */
+export class FollowLists extends DerivedData<ReturnType<typeof readList>> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [FOLLOWS]}],
+      eventToItem: (event: TrustedEvent) => readList(asDecryptedEvent(event)),
+      getKey: followList => followList.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    return this.ctx.use(Network).loadUsingOutbox(pubkey, {kinds: [FOLLOWS]}, relayHints)
+  }
+
+  follow = async (tag: string[]) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: FOLLOWS})
+    const event = await addToListPublicly(list, tag).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  unfollow = async (value: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: FOLLOWS})
+    const event = await removeFromList(list, value).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+}

packages/client/src/giftWraps.ts

@@ -0,0 +1,80 @@
+import {get, writable} from "svelte/store"
+import {TaskQueue, uniq, now} from "@welshman/lib"
+import {getPubkeyTagValues, getRelaysFromList, prep} from "@welshman/util"
+import type {TrustedEvent, SignedEvent, EventTemplate} from "@welshman/util"
+import {Nip59} from "@welshman/signer"
+import {MergedThunk, Thunks} from "./thunk.js"
+import type {ThunkOptions} from "./thunk.js"
+import {User} from "./user.js"
+import {MessagingRelayLists} from "./messagingRelayLists.js"
+import type {IClient} from "./client.js"
+
+export type SendWrappedOptions = Omit<
+  ThunkOptions,
+  "event" | "relays" | "recipient" | "client" | "user"
+> & {
+  event: EventTemplate
+  recipients: string[]
+}
+
+/**
+ * Per-client gift-wrap (NIP-59) state: the unwrap queue plus failure/dedup
+ * tracking. Scoped to `ctx.user`, so a client only ever unwraps its own user's
+ * messages into its own repository — which is what keeps DM history from being
+ * merged across identities. The repository subscription that feeds it lives in
+ * `clientPolicyGiftWraps`.
+ */
+export class GiftWraps {
+  failedUnwraps = new Set<string>()
+  queue: TaskQueue<TrustedEvent>
+
+  constructor(readonly ctx: IClient) {
+    this.queue = new TaskQueue<TrustedEvent>({
+      batchSize: 50,
+      batchDelay: 30,
+      processItem: async (wrap: TrustedEvent) => {
+        const signer = this.ctx.user?.signer
+        const recipient = this.ctx.user?.pubkey
+
+        // Only unwrap messages addressed to our user
+        if (!signer || !recipient || !getPubkeyTagValues(wrap.tags).includes(recipient)) {
+          return
+        }
+
+        try {
+          const rumor = await Nip59.fromSigner(signer).unwrap(wrap as SignedEvent)
+
+          this.ctx.wrapManager.add({wrap: wrap as SignedEvent, rumor, recipient})
+        } catch (e) {
+          this.failedUnwraps.add(wrap.id)
+        }
+      },
+    })
+  }
+
+  enqueue = (wrap: TrustedEvent) => {
+    if (this.failedUnwraps.has(wrap.id)) return
+    if (this.ctx.wrapManager.getRumor(wrap.id)) return
+
+    this.queue.push(wrap)
+  }
+
+  // NIP-59: wrap an event for each recipient (using their messaging relays) and
+  // publish the wraps as the client's user.
+  publish = async ({event, recipients, ...options}: SendWrappedOptions) => {
+    const user = User.require(this.ctx)
+
+    // Stabilize the event id across the different wraps
+    const stableEvent = prep(event, user.pubkey, now())
+
+    return new MergedThunk(
+      await Promise.all(
+        uniq(recipients).map(async recipient => {
+          const relays = getRelaysFromList(await this.ctx.use(MessagingRelayLists).load(recipient))
+
+          return this.ctx.use(Thunks).publish({event: stableEvent, relays, recipient, ...options})
+        }),
+      ),
+    )
+  }
+}

packages/client/src/handles.ts

@@ -0,0 +1,86 @@
+import {tryCatch, batcher, postJson} from "@welshman/lib"
+import type {Maybe} from "@welshman/lib"
+import {queryProfile, displayNip05} from "@welshman/util"
+import type {Handle} from "@welshman/util"
+import {deriveDeduplicated} from "@welshman/store"
+import {LoadableData, projection} from "./clientData.js"
+import type {Projection} from "./clientData.js"
+import type {IClient} from "./client.js"
+import {Profiles} from "./profiles.js"
+
+/**
+ * NIP-05 handles, keyed by nip05 identifier. A "local" loadable collection:
+ * items aren't nostr events, they're fetched over HTTP (either directly from
+ * each domain's `.well-known/nostr.json`, or via a dufflepud proxy to protect
+ * user privacy). Depends on the profiles collection to resolve a pubkey's
+ * handle.
+ */
+export class Handles extends LoadableData<Handle> {
+  constructor(ctx: IClient) {
+    super(ctx)
+  }
+
+  fetch = batcher(800, async (nip05s: string[]) => {
+    const result = new Map<string, Handle>()
+
+    // Use dufflepud if it's set up to protect user privacy, otherwise fetch directly
+    if (this.ctx.config.dufflepudUrl) {
+      const res: any = await tryCatch(
+        async () =>
+          await postJson(`${this.ctx.config.dufflepudUrl}/handle/info`, {handles: nip05s}),
+      )
+
+      for (const {handle: nip05, info} of res?.data || []) {
+        if (info) {
+          result.set(nip05, {...info, nip05})
+        }
+      }
+    } else {
+      const results = await Promise.all(
+        nip05s.map(async nip05 => ({
+          nip05,
+          info: await tryCatch(async () => await queryProfile(nip05)),
+        })),
+      )
+
+      for (const {nip05, info} of results) {
+        if (info) {
+          result.set(nip05, {...info, nip05})
+        }
+      }
+    }
+
+    for (const [nip05, info] of result) {
+      this.set(nip05, info)
+    }
+
+    return nip05s.map(nip05 => result.get(nip05))
+  })
+
+  loadForPubkey = async (pubkey: string, relays: string[] = []) => {
+    const $profile = await this.ctx.use(Profiles).load(pubkey, relays)
+
+    return $profile?.nip05 ? this.load($profile.nip05) : undefined
+  }
+
+  forPubkey = (pubkey: string, relays: string[] = []): Projection<Maybe<Handle>> => {
+    this.loadForPubkey(pubkey, relays)
+
+    const read = ([$handlesByNip05, $profile]: [ReadonlyMap<string, Handle>, Maybe<{nip05?: string}>]) => {
+      if (!$profile?.nip05) return undefined
+
+      const handle = $handlesByNip05.get($profile.nip05)
+
+      if (handle?.pubkey !== pubkey) return undefined
+
+      return handle
+    }
+
+    return projection(
+      deriveDeduplicated([this.index.$, this.ctx.use(Profiles).one(pubkey, relays)], read),
+      () => read([this.index.get(), this.ctx.use(Profiles).get(pubkey)]),
+    )
+  }
+
+  display = (nip05: string) => displayNip05(nip05)
+}

packages/client/src/index.ts

@@ -0,0 +1,34 @@
+export * from "./client.js"
+export * from "./policies.js"
+export * from "./network.js"
+export * from "./stores.js"
+export * from "./clientData.js"
+export * from "./user.js"
+export * from "./router.js"
+export * from "./relays.js"
+export * from "./relayStats.js"
+export * from "./relayLists.js"
+export * from "./blockedRelayLists.js"
+export * from "./plaintext.js"
+export * from "./profiles.js"
+export * from "./follows.js"
+export * from "./mutes.js"
+export * from "./pins.js"
+export * from "./blossom.js"
+export * from "./messagingRelayLists.js"
+export * from "./searchRelayLists.js"
+export * from "./handles.js"
+export * from "./zappers.js"
+export * from "./topics.js"
+export * from "./tags.js"
+export * from "./session.js"
+export * from "./logging.js"
+export * from "./wot.js"
+export * from "./feeds.js"
+export * from "./search.js"
+export * from "./sync.js"
+export * from "./giftWraps.js"
+export * from "./rooms.js"
+export * from "./relayManagement.js"
+export * from "./thunk.js"
+export * from "./createApp.js"

packages/client/src/logging.ts

@@ -0,0 +1,46 @@
+import {randomId} from "@welshman/lib"
+import {WrappedSigner} from "@welshman/signer"
+import type {ISigner} from "@welshman/signer"
+
+/**
+ * A structured, extensible log event. The built-in `signer` variant tracks each
+ * signer operation (sign/encrypt/decrypt/getPubkey); the open variant lets
+ * callers emit their own event types — it's not just a string.
+ */
+export type LogMessage =
+  | {
+      type: "signer"
+      id: string
+      method: string
+      status: "pending" | "success" | "failure"
+      error?: unknown
+      at: number
+    }
+  | {type: string; at: number; [key: string]: unknown}
+
+/**
+ * An `ISigner` wrapper that emits a structured `LogMessage` (as a "message"
+ * event on itself) for every operation it performs. `User.fromSigner` wraps
+ * signers in this so they're observable; subscribe via `makeClientPolicyLogger`.
+ */
+export class LoggingSigner extends WrappedSigner {
+  constructor(signer: ISigner) {
+    super(signer, async (method, thunk) => {
+      const id = randomId()
+
+      this.emit("message", {type: "signer", id, method, status: "pending", at: Date.now()})
+
+      try {
+        const result = await thunk()
+
+        this.emit("message", {type: "signer", id, method, status: "success", at: Date.now()})
+
+        return result
+      } catch (error) {
+        this.emit("message", {type: "signer", id, method, status: "failure", error, at: Date.now()})
+
+        throw error
+      }
+    })
+  }
+}

packages/client/src/messagingRelayLists.ts

@@ -0,0 +1,57 @@
+import {
+  MESSAGING_RELAYS,
+  asDecryptedEvent,
+  readList,
+  makeList,
+  makeEvent,
+  addToListPublicly,
+  removeFromList,
+} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {DerivedData} from "./clientData.js"
+import {Network} from "./network.js"
+import {Router} from "./router.js"
+import {User} from "./user.js"
+import {Thunks} from "./thunk.js"
+import type {IClient} from "./client.js"
+
+/**
+ * Kind-10050 messaging relay lists (NIP-17), keyed by pubkey. Loaded via the
+ * outbox model (the author's write relays), so it depends on the relay-list
+ * collection.
+ */
+export class MessagingRelayLists extends DerivedData<ReturnType<typeof readList>> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [MESSAGING_RELAYS]}],
+      eventToItem: (event: TrustedEvent) => readList(asDecryptedEvent(event)),
+      getKey: list => list.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    return this.ctx.use(Network).loadUsingOutbox(pubkey, {kinds: [MESSAGING_RELAYS]}, relayHints)
+  }
+
+  addRelay = async (url: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: MESSAGING_RELAYS})
+    const event = await addToListPublicly(list, ["relay", url]).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  removeRelay = async (url: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: MESSAGING_RELAYS})
+    const event = await removeFromList(list, url).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  setRelays = (urls: string[]) =>
+    this.ctx.use(Thunks).publish({
+      event: makeEvent(MESSAGING_RELAYS, {tags: urls.map(url => ["relay", url])}),
+      relays: this.ctx.use(Router).FromUser().getUrls(),
+    })
+}

packages/client/src/mutes.ts

@@ -0,0 +1,71 @@
+import {
+  MUTES,
+  asDecryptedEvent,
+  readList,
+  makeList,
+  addToListPublicly,
+  addToListPrivately,
+  removeFromList,
+  updateList,
+} from "@welshman/util"
+import type {TrustedEvent, PublishedList} from "@welshman/util"
+import {DerivedData} from "./clientData.js"
+import type {IClient} from "./client.js"
+import {Network} from "./network.js"
+import {Thunks} from "./thunk.js"
+import {Plaintext} from "./plaintext.js"
+import {User} from "./user.js"
+
+/**
+ * Kind-10000 mute lists, keyed by pubkey. Mute lists carry private entries in
+ * encrypted content, so decoding goes through the plaintext cache.
+ */
+export class MuteLists extends DerivedData<PublishedList> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [MUTES]}],
+      eventToItem: async (event: TrustedEvent) => {
+        const content = await ctx.use(Plaintext).ensure(event)
+
+        return readList(asDecryptedEvent(event, {content}))
+      },
+      getKey: mute => mute.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    return this.ctx.use(Network).loadUsingOutbox(pubkey, {kinds: [MUTES]}, relayHints)
+  }
+
+  mutePublicly = async (tag: string[]) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: MUTES})
+    const event = await addToListPublicly(list, tag).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  mutePrivately = async (tag: string[]) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: MUTES})
+    const event = await addToListPrivately(list, tag).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  unmute = async (value: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: MUTES})
+    const event = await removeFromList(list, value).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  setMutes = async (updates: {publicTags?: string[][]; privateTags?: string[][]}) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: MUTES})
+    const event = await updateList(list, updates).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+}

packages/client/src/network.ts

@@ -0,0 +1,62 @@
+import {chunk, first} from "@welshman/lib"
+import {RelayMode, getRelaysFromList, sortEventsDesc} from "@welshman/util"
+import type {Filter} from "@welshman/util"
+import {request, publish, diff, pull, push, makeLoader} from "@welshman/net"
+import type {
+  Loader,
+  LoaderOptions,
+  RequestOptions,
+  PublishOptions,
+  DiffOptions,
+  PullOptions,
+  PushOptions,
+} from "@welshman/net"
+import {Router, addMinimalFallbacks} from "./router.js"
+import {RelayLists} from "./relayLists.js"
+import type {IClient} from "./client.js"
+
+/**
+ * Net utilities bound to the client's net context (its pool + repository). Reach
+ * it via `client.use(Network)`; `load` is a shared, batched loader.
+ */
+export class Network {
+  load: Loader
+
+  constructor(readonly ctx: IClient) {
+    this.load = this.makeLoader({delay: 50, timeout: 3000, threshold: 0.5})
+  }
+
+  makeLoader = (options: Omit<LoaderOptions, "context">): Loader =>
+    makeLoader({...options, context: this.ctx.netContext})
+
+  request = (options: Omit<RequestOptions, "context">) =>
+    request({...options, context: this.ctx.netContext})
+
+  publish = (options: Omit<PublishOptions, "context">) =>
+    publish({...options, context: this.ctx.netContext})
+
+  diff = (options: Omit<DiffOptions, "context">) => diff({...options, context: this.ctx.netContext})
+
+  pull = (options: Omit<PullOptions, "context">) => pull({...options, context: this.ctx.netContext})
+
+  push = (options: Omit<PushOptions, "context">) => push({...options, context: this.ctx.netContext})
+
+  loadUsingOutbox = async (pubkey: string, filter: Filter = {}, relayHints: string[] = []) => {
+    const filters: Filter[] = [{...filter, authors: [pubkey]}]
+    const writeRelays = getRelaysFromList(await this.ctx.use(RelayLists).load(pubkey), RelayMode.Write)
+    const allRelays = this.ctx
+      .use(Router)
+      .FromRelays([...relayHints, ...writeRelays])
+      .policy(addMinimalFallbacks)
+      .limit(8)
+      .getUrls()
+
+    for (const relays of chunk(2, allRelays)) {
+      const events = await this.load({filters, relays})
+
+      if (events.length > 0) {
+        return first(sortEventsDesc(events))
+      }
+    }
+  }
+}

packages/client/src/pins.ts

@@ -0,0 +1,48 @@
+import {
+  PINS,
+  asDecryptedEvent,
+  readList,
+  makeList,
+  addToListPublicly,
+  removeFromList,
+} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {DerivedData} from "./clientData.js"
+import {Network} from "./network.js"
+import {Thunks} from "./thunk.js"
+import {User} from "./user.js"
+import type {IClient} from "./client.js"
+
+/**
+ * NIP-51 pin lists (kind 10001), keyed by pubkey. Loaded via the outbox model
+ * (the author's write relays), so it depends on the relay-list collection.
+ */
+export class PinLists extends DerivedData<ReturnType<typeof readList>> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [PINS]}],
+      eventToItem: (event: TrustedEvent) => readList(asDecryptedEvent(event)),
+      getKey: pins => pins.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    return this.ctx.use(Network).loadUsingOutbox(pubkey, {kinds: [PINS]}, relayHints)
+  }
+
+  pin = async (tag: string[]) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: PINS})
+    const event = await addToListPublicly(list, tag).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  unpin = async (value: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: PINS})
+    const event = await removeFromList(list, value).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+}

packages/client/src/plaintext.ts

@@ -0,0 +1,27 @@
+import {decrypt} from "@welshman/signer"
+import type {Maybe} from "@welshman/lib"
+import type {TrustedEvent} from "@welshman/util"
+import {ClientData} from "./clientData.js"
+
+/**
+ * A cache of decrypted event content, keyed by event id.
+ */
+export class Plaintext extends ClientData<string> {
+  ensure = async (event: TrustedEvent): Promise<Maybe<string>> => {
+    if (this.ctx.user?.pubkey !== event.pubkey) return
+
+    let result = this.get(event.id)
+    if (event.content && result === undefined) {
+      try {
+       result = await decrypt(this.ctx.user.signer, event.pubkey, event.content)
+       this.set(event.id, result)
+      } catch (e: any) {
+        if (!String(e).match(/invalid base64/)) {
+          throw e
+        }
+      }
+    }
+
+    return result
+  }
+}

packages/client/src/policies.ts

@@ -0,0 +1,144 @@
+import type {Unsubscriber} from "svelte/store"
+import {on, noop, always, call} from "@welshman/lib"
+import {WRAP, isDVMKind, isEphemeralKind, verifyEvent} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {SocketEvent, isRelayEvent, makeSocketPolicyAuth} from "@welshman/net"
+import type {RelayMessage, Socket} from "@welshman/net"
+import type {IClient} from "./client.js"
+import {RelayStats} from "./relayStats.js"
+import {GiftWraps} from "./giftWraps.js"
+import {BlockedRelayLists} from "./blockedRelayLists.js"
+import {LoggingSigner} from "./logging.js"
+import type {LogMessage} from "./logging.js"
+
+/**
+ * A client policy is a side effect applied once per client at construction,
+ * returning a cleanup function — directly analogous to a socket policy. Policies
+ * own everything that subscribes or links components together (event ingestion,
+ * stats collection, gift-wrap unwrapping), so the data classes themselves stay
+ * pure and free of subscriptions, and teardown is centralized in `cleanup()`.
+ */
+export type ClientPolicy = (client: IClient) => Unsubscriber
+
+/**
+ * Builds a client policy that authenticates the client's sockets (NIP-42) with
+ * the user's signer. It appends an auth socket policy to the pool's
+ * `socketPolicies`, so every socket the pool creates answers AUTH challenges
+ * according to `shouldAuth`; the policy is spliced back out on cleanup. No-op
+ * when the client has no user.
+ *
+ * Use the `clientPolicyAuthAlways` / `clientPolicyAuthNever` presets below, or
+ * call this with a custom predicate.
+ */
+export const makeClientPolicyAuth =
+  (shouldAuth: (socket: Socket, client: IClient) => boolean): ClientPolicy =>
+  client => {
+    if (!client.user) {
+      return noop
+    }
+
+    const policy = makeSocketPolicyAuth({
+      sign: client.user.signer.sign,
+      shouldAuth: socket => shouldAuth(socket, client),
+    })
+
+    client.pool.socketPolicies.push(policy)
+
+    return () => {
+      const index = client.pool.socketPolicies.indexOf(policy)
+
+      if (index !== -1) {
+        client.pool.socketPolicies.splice(index, 1)
+      }
+    }
+  }
+
+export const clientPolicyAuthNever = makeClientPolicyAuth(always(false))
+
+export const clientPolicyAuthAlways = makeClientPolicyAuth(always(true))
+
+export const clientPolicyAuthUnlessBlocked = makeClientPolicyAuth((socket, client) => {
+  if (!client.user) {
+    return false
+  }
+
+  return !client
+    .use(BlockedRelayLists)
+    .getBlockedRelays(client.user.pubkey)
+    .includes(socket.url)
+})
+
+/**
+ * Ingests every event received on any socket into the client's repository. The
+ * net layer doesn't do this for us, and it's how all the repository-backed
+ * collections (and gift-wrap unwrapping) get populated.
+ */
+export const clientPolicyIngest: ClientPolicy = client =>
+  client.pool.subscribe(socket => {
+    const onReceive = (message: RelayMessage) => {
+      if (!isRelayEvent(message)) return
+
+      const event = message[2]
+
+      if (isDVMKind(event.kind) || isEphemeralKind(event.kind)) return
+      if (!verifyEvent(event)) return
+
+      client.tracker.track(event.id, socket.url)
+      client.repository.publish(event)
+    }
+
+    socket.on(SocketEvent.Receive, onReceive)
+
+    return () => socket.off(SocketEvent.Receive, onReceive)
+  })
+
+/**
+ * Listens to socket activity on the client's pool into the RelayStats store.
+ */
+export const clientPolicyRelayStats: ClientPolicy = client => {
+  return client.pool.subscribe(client.use(RelayStats).monitorSocket)
+}
+
+/**
+ * Watches the client's repository for gift wraps (existing and incoming) and
+ * feeds them to the unwrap queue.
+ */
+export const clientPolicyGiftWraps: ClientPolicy = client => {
+  const giftWraps = client.use(GiftWraps)
+
+  for (const wrap of client.repository.query([{kinds: [WRAP]}])) {
+    giftWraps.enqueue(wrap)
+  }
+
+  return on(client.repository, "update", ({added}: {added: TrustedEvent[]}) => {
+    for (const event of added) {
+      if (event.kind === WRAP) {
+        giftWraps.enqueue(event)
+      }
+    }
+  })
+}
+
+/**
+ * Forwards "message" events from the user's signer to `onMessage`. Opt-in —
+ * add `clientPolicyLogger(handler)` to a client's `policies`.
+ */
+export const makeClientPolicyLogger =
+  (onMessage: (message: LogMessage) => void): ClientPolicy =>
+  client => {
+    const unsubscribers: Unsubscriber[] = []
+    const signer = client.user?.signer
+
+    if (signer instanceof LoggingSigner) {
+      unsubscribers.push(on(signer, "message", onMessage))
+    }
+
+    return () => unsubscribers.forEach(call)
+  }
+
+export const defaultClientPolicies: ClientPolicy[] = [
+  clientPolicyIngest,
+  clientPolicyRelayStats,
+  clientPolicyGiftWraps,
+  clientPolicyAuthUnlessBlocked,
+]

packages/client/src/profiles.ts

@@ -0,0 +1,54 @@
+import {derived, readable} from "svelte/store"
+import {
+  readProfile,
+  displayProfile,
+  displayPubkey,
+  isPublishedProfile,
+  createProfile,
+  editProfile,
+  PROFILE,
+} from "@welshman/util"
+import type {Profile} from "@welshman/util"
+import type {Maybe} from "@welshman/lib"
+import {DerivedData, projection} from "./clientData.js"
+import type {Projection} from "./clientData.js"
+import {Network} from "./network.js"
+import {Router} from "./router.js"
+import {Thunks} from "./thunk.js"
+import type {IClient} from "./client.js"
+
+/**
+ * Kind-0 profiles, keyed by pubkey. Loaded via the outbox model (the author's
+ * write relays), resolved through the relay-list collection at fetch time.
+ */
+export class Profiles extends DerivedData<ReturnType<typeof readProfile>> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [PROFILE]}],
+      eventToItem: readProfile,
+      getKey: profile => profile.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    return this.ctx.use(Network).loadUsingOutbox(pubkey, {kinds: [PROFILE]}, relayHints)
+  }
+
+  publish = (profile: Profile) => {
+    const router = this.ctx.use(Router)
+    const relays = router.merge([router.Index(), router.FromUser()]).getUrls()
+    const event = isPublishedProfile(profile) ? editProfile(profile) : createProfile(profile)
+
+    return this.ctx.use(Thunks).publish({event, relays})
+  }
+
+  display = (pubkey: string | undefined, ...args: any[]): Projection<string> => {
+    const read = ($profile: Maybe<ReturnType<typeof readProfile>>) =>
+      pubkey ? displayProfile($profile, displayPubkey(pubkey)) : ""
+
+    return projection(
+      pubkey ? derived(this.one(pubkey, ...args), read) : readable(""),
+      () => read(pubkey ? this.get(pubkey) : undefined),
+    )
+  }
+}

packages/client/src/relayLists.ts

@@ -0,0 +1,117 @@
+import {reject, nth, nthNe, nthEq, removeUndefined} from "@welshman/lib"
+import {
+  RELAYS,
+  RelayMode,
+  asDecryptedEvent,
+  readList,
+  getRelaysFromList,
+  getRelayTags,
+  getListTags,
+  getRelayTagValues,
+  makeList,
+  makeEvent,
+} from "@welshman/util"
+import type {TrustedEvent, PublishedList} from "@welshman/util"
+import {DerivedData} from "./clientData.js"
+import {Router, addMinimalFallbacks} from "./router.js"
+import {Network} from "./network.js"
+import {User} from "./user.js"
+import {Thunks} from "./thunk.js"
+import type {IClient} from "./client.js"
+
+/**
+ * NIP-65 relay lists, keyed by pubkey. This is the routing substrate every other
+ * outbox-model load depends on (see `Network.loadUsingOutbox`).
+ */
+export class RelayLists extends DerivedData<PublishedList> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [RELAYS]}],
+      eventToItem: (event: TrustedEvent) => readList(asDecryptedEvent(event)),
+      getKey: (list: PublishedList) => list.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    const filters = [{kinds: [RELAYS], authors: [pubkey], limit: 1}]
+    const networking = this.ctx.use(Network)
+    const router = this.ctx.use(Router)
+
+    return Promise.all([
+      networking.load({filters, relays: router.FromRelays(relayHints).getUrls()}),
+      networking.load({filters, relays: router.FromPubkey(pubkey).getUrls()}),
+      networking.load({filters, relays: router.Index().getUrls()}),
+    ])
+  }
+
+  getRelaysForPubkey = (pubkey: string, mode?: RelayMode) =>
+    getRelaysFromList(this.get(pubkey), mode)
+
+  // NIP-65 relay-list mutations for the client's user
+
+  addRelay = async (url: string, mode: RelayMode) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: RELAYS})
+    const dup = getRelayTags(getListTags(list)).find(nthEq(1, url))
+    const tag = removeUndefined(["r", url, dup && dup[2] !== mode ? undefined : mode])
+    const tags = [...list.publicTags.filter(nthNe(1, url)), tag]
+    const event = {kind: list.kind, content: list.event?.content || "", tags}
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  removeRelay = async (url: string, mode: RelayMode) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: RELAYS})
+    const dup = getRelayTags(getListTags(list)).find(nthEq(1, url))
+    const alt = mode === RelayMode.Read ? RelayMode.Write : RelayMode.Read
+    const tags = list.publicTags.filter(nthNe(1, url))
+
+    // If we had a duplicate that was used as the alt mode, keep the alt
+    if (dup && (!dup[2] || dup[2] === alt)) {
+      tags.push(["r", url, alt])
+    }
+
+    const event = {kind: list.kind, content: list.event?.content || "", tags}
+
+    // publishToOutbox is outbox-only, so build relays here to also notify the
+    // removed relay of its removal
+    const relays = [url, ...this.ctx.use(Router).FromUser().policy(addMinimalFallbacks).getUrls()]
+
+    return this.ctx.use(Thunks).publish({event, relays})
+  }
+
+  setRelays = (tags: string[][]) => {
+    const router = this.ctx.use(Router)
+    const event = makeEvent(RELAYS, {tags})
+    const relays = router
+      .merge([router.Index(), router.FromRelays(getRelayTagValues(tags))])
+      .getUrls()
+
+    return this.ctx.use(Thunks).publish({event, relays})
+  }
+
+  setReadRelays = async (urls: string[]) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: RELAYS})
+    const writeRelays = reject(nthEq(2, RelayMode.Read), getRelayTags(getListTags(list))).map(nth(1))
+    const writeTags = writeRelays.map(url => ["r", url, RelayMode.Write])
+    const readTags = urls.map(url => ["r", url, RelayMode.Read])
+    const tags = [...writeTags, ...readTags]
+    const event = {kind: list.kind, content: list.event?.content || "", tags}
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  setWriteRelays = async (urls: string[]) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: RELAYS})
+    const readRelays = reject(nthEq(2, RelayMode.Write), getRelayTags(getListTags(list))).map(nth(1))
+    const readTags = readRelays.map(url => ["r", url, RelayMode.Read])
+    const writeTags = urls.map(url => ["r", url, RelayMode.Write])
+    const tags = [...readTags, ...writeTags]
+    const event = {kind: list.kind, content: list.event?.content || "", tags}
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+}

packages/client/src/relayManagement.ts

@@ -0,0 +1,21 @@
+import {makeHttpAuth, sendManagementRequest} from "@welshman/util"
+import type {ManagementRequest} from "@welshman/util"
+import {User} from "./user.js"
+import type {IClient} from "./client.js"
+
+/**
+ * NIP-86 relay management. Signs an HTTP-auth event as the client's user and
+ * sends an admin request to a relay's management endpoint.
+ */
+export class RelayManagement {
+  constructor(readonly ctx: IClient) {}
+
+  post = async (url: string, request: ManagementRequest) => {
+    url = url.replace(/^ws/, "http")
+
+    const authTemplate = await makeHttpAuth(url, "POST", JSON.stringify(request))
+    const authEvent = await User.require(this.ctx).sign(authTemplate)
+
+    return sendManagementRequest(url, request, authEvent)
+  }
+}

packages/client/src/relayStats.ts

@@ -0,0 +1,207 @@
+import {groupBy, batch, now, uniq, ago, DAY, HOUR, MINUTE} from "@welshman/lib"
+import {isOnionUrl, isLocalUrl, isIPAddress, isRelayUrl} from "@welshman/util"
+import {SocketStatus, SocketEvent} from "@welshman/net"
+import type {ClientMessage, RelayMessage, Socket} from "@welshman/net"
+import {ClientData} from "./clientData.js"
+import {BlockedRelayLists} from "./blockedRelayLists.js"
+
+export type RelayStatsUpdate = [string, (stats: RelayStatsItem) => void]
+
+export type RelayStatsItem = {
+  url: string
+  first_seen: number
+  recent_errors: number[]
+  open_count: number
+  close_count: number
+  publish_count: number
+  request_count: number
+  event_count: number
+  last_open: number
+  last_close: number
+  last_error: number
+  last_publish: number
+  last_request: number
+  last_event: number
+  last_auth: number
+  publish_success_count: number
+  publish_failure_count: number
+  eose_count: number
+  notice_count: number
+}
+
+export const makeRelayStatsItem = (url: string): RelayStatsItem => ({
+  url,
+  first_seen: now(),
+  recent_errors: [],
+  open_count: 0,
+  close_count: 0,
+  publish_count: 0,
+  request_count: 0,
+  event_count: 0,
+  last_open: 0,
+  last_close: 0,
+  last_error: 0,
+  last_publish: 0,
+  last_request: 0,
+  last_event: 0,
+  last_auth: 0,
+  publish_success_count: 0,
+  publish_failure_count: 0,
+  eose_count: 0,
+  notice_count: 0,
+})
+
+/**
+ * Per-relay connection statistics, keyed by url, plus the `getQuality` heuristic
+ * the router uses to rank relays. A pure store — the socket wiring that fills it
+ * lives in `clientPolicyRelayStats`.
+ */
+export class RelayStats extends ClientData<RelayStatsItem> {
+  getQuality = (url: string) => {
+    // Skip non-relays entirely
+    if (!isRelayUrl(url)) return 0
+
+    // Skip relays the user has blocked
+    const pubkey = this.ctx.user?.pubkey
+
+    if (pubkey && this.ctx.use(BlockedRelayLists).getBlockedRelays(pubkey).includes(url)) {
+      return 0
+    }
+
+    const stats = this.get(url)
+
+    // If we have recent errors, skip it
+    if (stats) {
+      if (stats.recent_errors.filter(n => n > ago(MINUTE)).length > 0) return 0
+      if (stats.recent_errors.filter(n => n > ago(HOUR)).length > 3) return 0
+      if (stats.recent_errors.filter(n => n > ago(DAY)).length > 10) return 0
+    }
+
+    // Prefer stuff we're connected to
+    if (this.ctx.pool.has(url)) return 1
+
+    // Prefer stuff we've connected to in the past
+    if (stats) return 0.9
+
+    // If it's not a weird url give it an ok score
+    if (!isIPAddress(url) && !isLocalUrl(url) && !isOnionUrl(url) && !url.startsWith("ws://")) {
+      return 0.8
+    }
+
+    // Default to a "meh" score
+    return 0.7
+  }
+
+  private update = batch(150, (batched: RelayStatsUpdate[]) => {
+    for (const [url, updates] of groupBy(([url]) => url, batched)) {
+      if (!url || !isRelayUrl(url)) {
+        console.warn(`Attempted to update stats for an invalid relay url: ${url}`)
+        continue
+      }
+
+      const prev = this.get(url)
+      const next = prev ? {...prev} : makeRelayStatsItem(url)
+
+      for (const [, update] of updates) {
+        update(next)
+      }
+
+      this.set(url, next)
+    }
+  })
+
+  private onSocketSend = ([verb]: ClientMessage, url: string) => {
+    if (verb === "REQ") {
+      this.update([
+        url,
+        stats => {
+          stats.request_count++
+          stats.last_request = now()
+        },
+      ])
+    } else if (verb === "EVENT") {
+      this.update([
+        url,
+        stats => {
+          stats.publish_count++
+          stats.last_publish = now()
+        },
+      ])
+    }
+  }
+
+  private onSocketReceive = ([verb, ...extra]: RelayMessage, url: string) => {
+    if (verb === "OK") {
+      const [, ok] = extra
+
+      this.update([
+        url,
+        stats => {
+          if (ok) {
+            stats.publish_success_count++
+          } else {
+            stats.publish_failure_count++
+          }
+        },
+      ])
+    } else if (verb === "AUTH") {
+      this.update([url, stats => (stats.last_auth = now())])
+    } else if (verb === "EVENT") {
+      this.update([
+        url,
+        stats => {
+          stats.event_count++
+          stats.last_event = now()
+        },
+      ])
+    } else if (verb === "EOSE") {
+      this.update([url, stats => stats.eose_count++])
+    } else if (verb === "NOTICE") {
+      this.update([url, stats => stats.notice_count++])
+    }
+  }
+
+  private onSocketStatus = (status: string, url: string) => {
+    if (status === SocketStatus.Open) {
+      this.update([
+        url,
+        stats => {
+          stats.last_open = now()
+          stats.open_count++
+        },
+      ])
+    }
+
+    if (status === SocketStatus.Closed) {
+      this.update([
+        url,
+        stats => {
+          stats.last_close = now()
+          stats.close_count++
+        },
+      ])
+    }
+
+    if (status === SocketStatus.Error) {
+      this.update([
+        url,
+        stats => {
+          stats.last_error = now()
+          stats.recent_errors = uniq(stats.recent_errors.concat(now())).slice(-10)
+        },
+      ])
+    }
+  }
+
+  monitorSocket = (socket: Socket) => {
+    socket.on(SocketEvent.Send, this.onSocketSend)
+    socket.on(SocketEvent.Receive, this.onSocketReceive)
+    socket.on(SocketEvent.Status, this.onSocketStatus)
+
+    return () => {
+      socket.off(SocketEvent.Send, this.onSocketSend)
+      socket.off(SocketEvent.Receive, this.onSocketReceive)
+      socket.off(SocketEvent.Status, this.onSocketStatus)
+    }
+  }
+}

packages/client/src/relays.ts

@@ -0,0 +1,45 @@
+import {derived} from "svelte/store"
+import {fetchJson} from "@welshman/lib"
+import type {Maybe} from "@welshman/lib"
+import {displayRelayUrl, displayRelayProfile} from "@welshman/util"
+import type {RelayProfile} from "@welshman/util"
+import {LoadableData, projection} from "./clientData.js"
+import type {Projection} from "./clientData.js"
+
+/**
+ * NIP-11 relay profiles, keyed by url. A "local" loadable collection: items
+ * aren't nostr events, they're fetched over HTTP from each relay.
+ */
+export class Relays extends LoadableData<RelayProfile> {
+  fetch = async (url: string): Promise<Maybe<RelayProfile>> => {
+    try {
+      const json = await fetchJson(url.replace(/^ws/, "http"), {
+        headers: {
+          Accept: "application/nostr+json",
+        },
+      })
+
+      if (json) {
+        const info = {...json, url} as RelayProfile
+
+        if (!Array.isArray(info.supported_nips)) {
+          info.supported_nips = []
+        }
+
+        info.supported_nips = info.supported_nips.map(String)
+
+        this.set(url, info)
+
+        return info
+      }
+    } catch (e) {
+      // pass
+    }
+  }
+
+  display = (url: string): Projection<string> => {
+    const read = ($relay: Maybe<RelayProfile>) => displayRelayProfile($relay, displayRelayUrl(url))
+
+    return projection(derived(this.one(url), read), () => read(this.get(url)))
+  }
+}

packages/client/src/rooms.ts

@@ -0,0 +1,40 @@
+import {
+  makeRoomCreateEvent,
+  makeRoomDeleteEvent,
+  makeRoomEditEvent,
+  makeRoomJoinEvent,
+  makeRoomLeaveEvent,
+  makeRoomAddMemberEvent,
+  makeRoomRemoveMemberEvent,
+} from "@welshman/util"
+import type {RoomMeta} from "@welshman/util"
+import {Thunks} from "./thunk.js"
+import type {ThunkOptions} from "./thunk.js"
+import type {IClient} from "./client.js"
+
+/**
+ * NIP-29 relay-based group (room) management. Each method publishes the relevant
+ * room event to the given relay as the client's user.
+ */
+export class Rooms {
+  constructor(readonly ctx: IClient) {}
+
+  private publish = (url: string, event: ThunkOptions["event"]) =>
+    this.ctx.use(Thunks).publish({event, relays: [url]})
+
+  create = (url: string, room: RoomMeta) => this.publish(url, makeRoomCreateEvent(room))
+
+  delete = (url: string, room: RoomMeta) => this.publish(url, makeRoomDeleteEvent(room))
+
+  edit = (url: string, room: RoomMeta) => this.publish(url, makeRoomEditEvent(room))
+
+  join = (url: string, room: RoomMeta) => this.publish(url, makeRoomJoinEvent(room))
+
+  leave = (url: string, room: RoomMeta) => this.publish(url, makeRoomLeaveEvent(room))
+
+  addMember = (url: string, room: RoomMeta, pubkey: string) =>
+    this.publish(url, makeRoomAddMemberEvent(room, pubkey))
+
+  removeMember = (url: string, room: RoomMeta, pubkey: string) =>
+    this.publish(url, makeRoomRemoveMemberEvent(room, pubkey))
+}

packages/client/src/router.ts

@@ -0,0 +1,29 @@
+import {Router as BaseRouter} from "@welshman/router"
+import {RelayLists} from "./relayLists.js"
+import {RelayStats} from "./relayStats.js"
+import type {IClient} from "./client.js"
+
+// Re-export the upstream router surface (scenarios, fallback policies,
+// makeSelection, getFilterSelections, types). The local `Router` below shadows
+// the upstream `Router` in this re-export.
+export * from "@welshman/router"
+
+/**
+ * The upstream `@welshman/router` Router, wired to this client: relay lists come
+ * from the `RelayLists` collection, quality from `RelayStats`, and the user
+ * pubkey + relay-getters from the client (via `ctx.config`). Reach it via
+ * `client.use(Router)`. This replaces the old forked copy — one source of truth,
+ * no global `routerContext`/`Router.get()`.
+ */
+export class Router extends BaseRouter {
+  constructor(ctx: IClient) {
+    super({
+      getUserPubkey: () => ctx.user?.pubkey,
+      getPubkeyRelays: (pubkey, mode) => ctx.use(RelayLists).getRelaysForPubkey(pubkey, mode),
+      getRelayQuality: url => ctx.use(RelayStats).getQuality(url),
+      getDefaultRelays: ctx.config.getDefaultRelays,
+      getIndexerRelays: ctx.config.getIndexerRelays,
+      getSearchRelays: ctx.config.getSearchRelays,
+    })
+  }
+}

packages/client/src/search.ts

@@ -0,0 +1,128 @@
+import Fuse from "fuse.js"
+import type {IFuseOptions, FuseResult} from "fuse.js"
+import {debounce} from "throttle-debounce"
+import {derived} from "svelte/store"
+import type {Readable} from "svelte/store"
+import {dec, inc, sortBy} from "@welshman/lib"
+import {PROFILE} from "@welshman/util"
+import type {PublishedProfile, RelayProfile} from "@welshman/util"
+import {throttled} from "@welshman/store"
+import type {IClient} from "./client.js"
+import {Network} from "./network.js"
+import {Router} from "./router.js"
+import {Profiles} from "./profiles.js"
+import {Topics} from "./topics.js"
+import type {Topic} from "./topics.js"
+import {Relays} from "./relays.js"
+import {Handles} from "./handles.js"
+import {Wot} from "./wot.js"
+
+export type SearchOptions<V, T> = {
+  getValue: (item: T) => V
+  fuseOptions?: IFuseOptions<T>
+  onSearch?: (term: string) => void
+  sortFn?: (items: FuseResult<T>) => any
+}
+
+export type Search<V, T> = {
+  options: T[]
+  getValue: (item: T) => V
+  getOption: (value: V) => T | undefined
+  searchOptions: (term: string) => T[]
+  searchValues: (term: string) => V[]
+}
+
+export const createSearch = <V, T>(options: T[], opts: SearchOptions<V, T>): Search<V, T> => {
+  const fuse = new Fuse(options, {...opts.fuseOptions, includeScore: true})
+  const map = new Map<V, T>(options.map(item => [opts.getValue(item), item]))
+
+  const search = (term: string) => {
+    opts.onSearch?.(term)
+
+    let results = term ? fuse.search(term) : options.map(item => ({item}) as FuseResult<T>)
+
+    if (opts.sortFn) {
+      results = sortBy(opts.sortFn, results)
+    }
+
+    return results.map(result => result.item)
+  }
+
+  return {
+    options,
+    getValue: opts.getValue,
+    getOption: (value: V) => map.get(value),
+    searchOptions: (term: string) => search(term),
+    searchValues: (term: string) => search(term).map(opts.getValue),
+  }
+}
+
+/**
+ * Reactive fuzzy searches over the client's profiles, topics, and relays.
+ * `profileSearch` blends fuse scores with web-of-trust weight (via `Wot`) and
+ * fires a debounced NIP-50 network search through the client's loader.
+ */
+export class Searches {
+  profileSearch: Readable<Search<string, PublishedProfile>>
+  topicSearch: Readable<Search<string, Topic>>
+  relaySearch: Readable<Search<string, RelayProfile>>
+
+  constructor(readonly ctx: IClient) {
+    this.profileSearch = derived(
+      [throttled(800, this.ctx.use(Profiles).all.$), throttled(800, this.ctx.use(Handles).index.$)],
+      ([$profiles, $handlesByNip05]) => {
+        // Remove invalid nip05's from profiles
+        const options = $profiles.map(p => {
+          const isNip05Valid = !p.nip05 || $handlesByNip05.get(p.nip05)?.pubkey === p.event.pubkey
+
+          return isNip05Valid ? p : {...p, nip05: ""}
+        })
+
+        return createSearch(options, {
+          onSearch: this.searchProfiles,
+          getValue: (profile: PublishedProfile) => profile.event.pubkey,
+          sortFn: ({score = 1, item}) => {
+            const wotScore = this.ctx.use(Wot).graph.get().get(item.event.pubkey) || 0
+
+            return dec(score) * inc(wotScore / (this.ctx.use(Wot).max.get() || 1))
+          },
+          fuseOptions: {
+            keys: [
+              "nip05",
+              {name: "name", weight: 0.8},
+              {name: "display_name", weight: 0.5},
+              {name: "about", weight: 0.3},
+            ],
+            threshold: 0.3,
+            shouldSort: false,
+          },
+        })
+      },
+    )
+
+    this.topicSearch = derived(this.ctx.use(Topics).all, $topics =>
+      createSearch($topics, {
+        getValue: (topic: Topic) => topic.name,
+        fuseOptions: {keys: ["name"]},
+      }),
+    )
+
+    this.relaySearch = derived(this.ctx.use(Relays).all.$, $relays =>
+      createSearch($relays, {
+        getValue: (relay: RelayProfile) => relay.url,
+        fuseOptions: {
+          keys: ["url", "name", {name: "description", weight: 0.3}],
+        },
+      }),
+    )
+  }
+
+  searchProfiles = debounce(500, (search: string) => {
+    if (search.length > 2) {
+      this.ctx.use(Network).load({
+        filters: [{kinds: [PROFILE], search}],
+        relays: this.ctx.use(Router).Search().getUrls(),
+      })
+    }
+  })
+}

packages/client/src/searchRelayLists.ts

@@ -0,0 +1,57 @@
+import {
+  SEARCH_RELAYS,
+  asDecryptedEvent,
+  readList,
+  makeList,
+  makeEvent,
+  addToListPublicly,
+  removeFromList,
+} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {DerivedData} from "./clientData.js"
+import {Network} from "./network.js"
+import {Router} from "./router.js"
+import {User} from "./user.js"
+import {Thunks} from "./thunk.js"
+import type {IClient} from "./client.js"
+
+/**
+ * NIP-51 search relay lists (kind 10007), keyed by pubkey. Loaded via the
+ * outbox model (the author's write relays), so it depends on the relay-list
+ * collection.
+ */
+export class SearchRelayLists extends DerivedData<ReturnType<typeof readList>> {
+  constructor(ctx: IClient) {
+    super(ctx, {
+      filters: [{kinds: [SEARCH_RELAYS]}],
+      eventToItem: (event: TrustedEvent) => readList(asDecryptedEvent(event)),
+      getKey: searchRelayList => searchRelayList.event.pubkey,
+    })
+  }
+
+  fetch(pubkey: string, relayHints: string[] = []) {
+    return this.ctx.use(Network).loadUsingOutbox(pubkey, {kinds: [SEARCH_RELAYS]}, relayHints)
+  }
+
+  addRelay = async (url: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: SEARCH_RELAYS})
+    const event = await addToListPublicly(list, ["relay", url]).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  removeRelay = async (url: string) => {
+    const user = User.require(this.ctx)
+    const list = (await this.forceLoad(user.pubkey)) || makeList({kind: SEARCH_RELAYS})
+    const event = await removeFromList(list, url).reconcile(user.nip44EncryptToSelf)
+
+    return this.ctx.use(Thunks).publishToOutbox({event})
+  }
+
+  setRelays = (urls: string[]) =>
+    this.ctx.use(Thunks).publish({
+      event: makeEvent(SEARCH_RELAYS, {tags: urls.map(url => ["relay", url])}),
+      relays: this.ctx.use(Router).FromUser().getUrls(),
+    })
+}

packages/client/src/session.ts

@@ -0,0 +1,82 @@
+import {Client as PomadeClient, PomadeSigner} from "@pomade/core"
+import type {ClientOptions as PomadeClientOptions} from "@pomade/core"
+import type {MaybeAsync} from "@welshman/lib"
+import {Nip46Broker, Nip46Signer, Nip07Signer, Nip01Signer, Nip55Signer} from "@welshman/signer"
+import type {ISigner} from "@welshman/signer"
+
+// ── Sessions: serializable {method, data} descriptors ──
+
+export type Session<M extends string = string, D = unknown> = {
+  method: M
+  data: D
+}
+
+// ── Session handlers: a method string, its data shape, and how to build a signer ──
+
+export type SessionHandler<M extends string, D> = {
+  method: M
+  getSigner: (data: D) => MaybeAsync<ISigner>
+}
+
+/**
+ * Define a session handler. `M` and `D` are inferred from the arguments, so
+ * `getSigner` is type-checked against the data shape — and the same handler is
+ * used to build typed sessions (`toSession`) and to reconstruct signers.
+ */
+export const defineSessionHandler = <M extends string, D>(handler: SessionHandler<M, D>) => handler
+
+/** Build a typed, serializable session from a handler and its data. */
+export const toSession = <M extends string, D>(
+  handler: SessionHandler<M, D>,
+  data: D,
+): Session<M, D> => ({method: handler.method, data})
+
+// ── Built-in handlers ──
+
+export const nip01 = defineSessionHandler({
+  method: "nip01",
+  getSigner: (data: {secret: string}) => new Nip01Signer(data.secret),
+})
+
+export const nip07 = defineSessionHandler({
+  method: "nip07",
+  getSigner: (_data: Record<string, never>) => new Nip07Signer(),
+})
+
+export const nip46 = defineSessionHandler({
+  method: "nip46",
+  getSigner: (data: {clientSecret: string; signerPubkey: string; relays: string[]}) =>
+    new Nip46Signer(new Nip46Broker(data)),
+})
+
+export const nip55 = defineSessionHandler({
+  method: "nip55",
+  getSigner: (data: {pubkey: string; signer: string}) => new Nip55Signer(data.signer, data.pubkey),
+})
+
+export const pomade = defineSessionHandler({
+  method: "pomade",
+  getSigner: (data: {clientOptions: PomadeClientOptions; email: string}) =>
+    new PomadeSigner(new PomadeClient(data.clientOptions)),
+})
+
+// ── Registry: deserialize a stored session back into a signer ──
+
+export const sessionHandlers = new Map<string, SessionHandler<string, any>>()
+
+export const registerSessionHandler = (handler: SessionHandler<string, any>) => {
+  sessionHandlers.set(handler.method, handler)
+}
+
+export const unregisterSessionHandler = (handler: SessionHandler<string, any>) => {
+  sessionHandlers.delete(handler.method)
+}
+
+export const getSignerFromSession = (session: Session): MaybeAsync<ISigner> | undefined =>
+  sessionHandlers.get(session.method)?.getSigner(session.data)
+
+// ── Initialize default session handlers ──
+
+for (const sessionHandler of [nip01, nip07, nip46, nip55, pomade]) {
+  registerSessionHandler(sessionHandler)
+}

packages/client/src/stores.ts

@@ -0,0 +1,58 @@
+import {
+  getEventsById,
+  deriveEventsById,
+  deriveEvents,
+  makeDeriveEvent,
+  getEventsByIdByUrl,
+  deriveEventsByIdByUrl,
+  getEventsByIdForUrl,
+  deriveEventsByIdForUrl,
+  deriveItemsByKey,
+  deriveIsDeleted,
+} from "@welshman/store"
+import type {
+  EventsByIdOptions,
+  EventOptions,
+  EventsByIdByUrlOptions,
+  EventsByIdForUrlOptions,
+  ItemsByKeyOptions,
+} from "@welshman/store"
+import type {TrustedEvent} from "@welshman/util"
+import type {IClient} from "./client.js"
+
+/**
+ * Store/derivation utilities bound to the client's repository and tracker. Reach
+ * it via `client.use(Stores)`.
+ */
+export class Stores {
+  constructor(readonly ctx: IClient) {}
+
+  getEventsById = (options: Omit<EventsByIdOptions, "repository">) =>
+    getEventsById({...options, repository: this.ctx.repository})
+
+  eventsById = (options: Omit<EventsByIdOptions, "repository">) =>
+    deriveEventsById({...options, repository: this.ctx.repository})
+
+  events = (options: Omit<EventsByIdOptions, "repository">) =>
+    deriveEvents({...options, repository: this.ctx.repository})
+
+  makeEvent = (options: Omit<EventOptions, "repository">) =>
+    makeDeriveEvent({...options, repository: this.ctx.repository})
+
+  getEventsByIdByUrl = (options: Omit<EventsByIdByUrlOptions, "tracker" | "repository">) =>
+    getEventsByIdByUrl({...options, tracker: this.ctx.tracker, repository: this.ctx.repository})
+
+  eventsByIdByUrl = (options: Omit<EventsByIdByUrlOptions, "tracker" | "repository">) =>
+    deriveEventsByIdByUrl({...options, tracker: this.ctx.tracker, repository: this.ctx.repository})
+
+  getEventsByIdForUrl = (options: Omit<EventsByIdForUrlOptions, "tracker" | "repository">) =>
+    getEventsByIdForUrl({...options, tracker: this.ctx.tracker, repository: this.ctx.repository})
+
+  eventsByIdForUrl = (options: Omit<EventsByIdForUrlOptions, "tracker" | "repository">) =>
+    deriveEventsByIdForUrl({...options, tracker: this.ctx.tracker, repository: this.ctx.repository})
+
+  itemsByKey = <T>(options: Omit<ItemsByKeyOptions<T>, "repository">) =>
+    deriveItemsByKey<T>({...options, repository: this.ctx.repository})
+
+  isDeleted = (event: TrustedEvent) => deriveIsDeleted(this.ctx.repository, event)
+}

packages/client/src/sync.ts

@@ -0,0 +1,59 @@
+import {isSignedEvent} from "@welshman/util"
+import type {Filter, SignedEvent} from "@welshman/util"
+import type {IClient} from "./client.js"
+import {Network} from "./network.js"
+import {Relays} from "./relays.js"
+
+export type AppSyncOpts = {
+  relays: string[]
+  filters: Filter[]
+}
+
+/**
+ * Negentropy-aware sync. Pulls/pushes events between the local repository and a
+ * set of relays, using NIP-77 reconciliation where the relay supports it and
+ * falling back to plain request/publish otherwise. Reads NIP-11 relay profiles
+ * from the `Relays` collection to detect negentropy support.
+ */
+export class Sync {
+  constructor(readonly ctx: IClient) {}
+
+  query = (filters: Filter[]) =>
+    this.ctx.repository.query(filters, {shouldSort: filters.every(f => f.limit === undefined)})
+
+  hasNegentropy = (url: string) => {
+    const relay = this.ctx.use(Relays).get(url)
+
+    if (relay?.negentropy) return true
+    if (relay?.supported_nips?.includes?.("77")) return true
+    if (relay?.software?.includes?.("strfry") && !relay?.version?.match(/^0\./)) return true
+
+    return false
+  }
+
+  pull = async ({relays, filters}: AppSyncOpts) => {
+    const net = this.ctx.use(Network)
+    const events = this.query(filters).filter(isSignedEvent)
+
+    await Promise.all(
+      relays.map(async relay => {
+        await (this.hasNegentropy(relay)
+          ? net.pull({filters, events, relays: [relay]})
+          : net.request({filters, relays: [relay], autoClose: true}))
+      }),
+    )
+  }
+
+  push = async ({relays, filters}: AppSyncOpts) => {
+    const net = this.ctx.use(Network)
+    const events = this.query(filters).filter(isSignedEvent)
+
+    await Promise.all(
+      relays.map(async relay => {
+        await (this.hasNegentropy(relay)
+          ? net.push({filters, events, relays: [relay]})
+          : Promise.all(events.map((event: SignedEvent) => net.publish({event, relays: [relay]}))))
+      }),
+    )
+  }
+}

packages/client/src/tags.ts

@@ -0,0 +1,142 @@
+import {uniq, remove} from "@welshman/lib"
+import {
+  getAddress,
+  isReplaceable,
+  getReplyTags,
+  getPubkeyTagValues,
+  isReplaceableKind,
+  isShareableRelayUrl,
+} from "@welshman/util"
+import type {TrustedEvent} from "@welshman/util"
+import {Router} from "./router.js"
+import {Profiles} from "./profiles.js"
+import type {IClient} from "./client.js"
+
+/**
+ * Builders for nostr tags (p/e/a/q/zap/reply/comment/reaction). Needs the router
+ * for relay hints, the profiles collection for display names, and the client's
+ * user to avoid self-tagging.
+ */
+export class Tags {
+  constructor(readonly ctx: IClient) {}
+
+  tagZapSplit = (pubkey: string, split = 1) => [
+    "zap",
+    pubkey,
+    this.ctx.use(Router).FromPubkey(pubkey).getUrl() || "",
+    String(split),
+  ]
+
+  tagPubkey = (pubkey: string) => [
+    "p",
+    pubkey,
+    this.ctx.use(Router).FromPubkey(pubkey).getUrl() || "",
+    this.ctx.use(Profiles).display(pubkey).get(),
+  ]
+
+  tagEvent = (event: TrustedEvent, url = "", mark = "") => {
+    if (!url) {
+      url = this.ctx.use(Router).Event(event).getUrl() || ""
+    }
+
+    const tags = [["e", event.id, url, mark, event.pubkey]]
+
+    if (isReplaceable(event)) {
+      tags.push(["a", getAddress(event), url, mark, event.pubkey])
+    }
+
+    return tags
+  }
+
+  tagEventPubkeys = (event: TrustedEvent) =>
+    uniq(
+      remove(this.ctx.user?.pubkey ?? "", [event.pubkey, ...getPubkeyTagValues(event.tags)]),
+    ).map(pubkey => this.tagPubkey(pubkey))
+
+  tagEventForQuote = (event: TrustedEvent, relay?: string) => {
+    const hint = relay || this.ctx.use(Router).Event(event).getUrl() || ""
+
+    return ["q", event.id, hint, event.pubkey]
+  }
+
+  tagEventForReply = (event: TrustedEvent, relay?: string) => {
+    const tags = this.tagEventPubkeys(event)
+    const {roots, replies} = getReplyTags(event.tags)
+    const parents = roots.length > 0 ? roots : replies
+    const mark = parents.length > 0 ? "reply" : "root"
+    const hint = relay || this.ctx.use(Router).Event(event).getUrl() || ""
+
+    // If the parent included roots use them, otherwise use replies as a fallback
+    for (const [k, id, originalHint = "", _, pubkey = ""] of parents) {
+      const hint = isShareableRelayUrl(originalHint)
+        ? originalHint
+        : this.ctx.use(Router).EventRoots(event).getUrl()
+
+      tags.push([k, id, hint || "", "root", pubkey])
+    }
+
+    // e-tag the event
+    tags.push(["e", event.id, hint, mark, event.pubkey])
+
+    // a-tag the event
+    if (isReplaceable(event)) {
+      tags.push(["a", getAddress(event), hint, mark, event.pubkey])
+    }
+
+    return tags
+  }
+
+  tagEventForComment = (event: TrustedEvent, relay?: string) => {
+    const pubkeyHint = this.ctx.use(Router).FromPubkey(event.pubkey).getUrl() || ""
+    const eventHint = relay || this.ctx.use(Router).Event(event).getUrl() || ""
+    const address = getAddress(event)
+    const seenRoots = new Set<string>()
+    const tags: string[][] = []
+
+    for (const [t, ...tag] of event.tags) {
+      if (["K", "E", "A", "I", "P"].includes(t)) {
+        tags.push([t, ...tag])
+        seenRoots.add(t)
+      }
+    }
+
+    if (seenRoots.size === 0) {
+      tags.push(["K", String(event.kind)])
+      tags.push(["P", event.pubkey, pubkeyHint])
+      tags.push(["E", event.id, eventHint, event.pubkey])
+
+      if (isReplaceableKind(event.kind)) {
+        tags.push(["A", address, eventHint, event.pubkey])
+      }
+    }
+
+    tags.push(["k", String(event.kind)])
+    tags.push(["p", event.pubkey, pubkeyHint])
+    tags.push(["e", event.id, eventHint, event.pubkey])
+
+    if (isReplaceableKind(event.kind)) {
+      tags.push(["a", address, eventHint, event.pubkey])
+    }
+
+    return tags
+  }
+
+  tagEventForReaction = (event: TrustedEvent, relay?: string) => {
+    const hint = relay || this.ctx.use(Router).Event(event).getUrl() || ""
+    const tags: string[][] = []
+
+    // Mention the event's author
+    if (event.pubkey !== this.ctx.user?.pubkey) {
+      tags.push(this.tagPubkey(event.pubkey))
+    }
+
+    tags.push(["k", String(event.kind)])
+    tags.push(["e", event.id, hint])
+
+    if (isReplaceable(event)) {
+      tags.push(["a", getAddress(event), hint])
+    }
+
+    return tags
+  }
+}

packages/client/src/thunk.ts

@@ -0,0 +1,410 @@
+import type {Subscriber} from "svelte/store"
+import {writable} from "svelte/store"
+import type {Override} from "@welshman/lib"
+import {append, TaskQueue, ensurePlural, remove, defer, sleep, nth, uniq, without} from "@welshman/lib"
+import {
+  HashedEvent,
+  EventTemplate,
+  SignedEvent,
+  isSignedEvent,
+  WRAPPED_KINDS,
+  prep,
+  makePow,
+} from "@welshman/util"
+import {PublishStatus, PublishResult, PublishOptions, PublishResultsByRelay} from "@welshman/net"
+import {Nip01Signer, Nip59} from "@welshman/signer"
+import type {IClient} from "./client.js"
+import {Network} from "./network.js"
+import {Router, addMinimalFallbacks} from "./router.js"
+import {User} from "./user.js"
+
+export type ThunkOptions = Override<
+  PublishOptions,
+  {
+    client: IClient
+    event: EventTemplate
+    recipient?: string
+    delay?: number
+    pow?: number
+  }
+>
+
+/**
+ * Shared base for `Thunk` and `MergedThunk`: a subscribable bag of per-relay
+ * publish `results`.
+ */
+export abstract class BaseThunk {
+  _subs: Subscriber<any>[] = []
+  results: PublishResultsByRelay = {}
+
+  abstract abort(): void
+
+  _notify() {
+    for (const subscriber of this._subs) {
+      subscriber(this)
+    }
+  }
+
+  subscribe(subscriber: Subscriber<this>) {
+    this._subs.push(subscriber)
+
+    subscriber(this)
+
+    return () => {
+      this._subs = remove(subscriber, this._subs)
+    }
+  }
+
+  getUrlsWithStatus(statuses: PublishStatus | PublishStatus[]) {
+    const matches = ensurePlural(statuses)
+
+    return Object.entries(this.results)
+      .filter(([_, {status}]) => matches.includes(status))
+      .map(nth(0)) as string[]
+  }
+
+  getCompleteUrls() {
+    return this.getUrlsWithStatus(
+      without([PublishStatus.Sending, PublishStatus.Pending], Object.values(PublishStatus)),
+    )
+  }
+
+  getIncompleteUrls() {
+    return this.getUrlsWithStatus([PublishStatus.Sending, PublishStatus.Pending])
+  }
+
+  getFailedUrls() {
+    return this.getUrlsWithStatus([PublishStatus.Failure, PublishStatus.Timeout])
+  }
+
+  hasStatus(statuses: PublishStatus | PublishStatus[]) {
+    return this.getUrlsWithStatus(statuses).length > 0
+  }
+
+  isComplete() {
+    return !this.hasStatus([PublishStatus.Sending, PublishStatus.Pending])
+  }
+
+  getError() {
+    for (const [_, {status, detail}] of Object.entries(this.results)) {
+      if (status === PublishStatus.Failure) {
+        return detail
+      }
+    }
+
+    if (this.isComplete()) {
+      return ""
+    }
+  }
+
+  waitForError() {
+    return new Promise<string>(resolve => {
+      this.subscribe(thunk => {
+        const error = thunk.getError()
+
+        if (error !== undefined) {
+          resolve(error)
+        }
+      })
+    })
+  }
+
+  waitForCompletion() {
+    return new Promise<void>(resolve => {
+      this.subscribe(thunk => {
+        if (thunk.isComplete()) {
+          resolve()
+        }
+      })
+    })
+  }
+}
+
+export class Thunk extends BaseThunk {
+  event: HashedEvent
+  complete = defer<void>()
+  controller = new AbortController()
+  wrap?: SignedEvent
+
+  constructor(readonly options: ThunkOptions) {
+    super()
+
+    if (!options.recipient && WRAPPED_KINDS.includes(options.event.kind)) {
+      throw new Error(`Attempted to publish a kind ${options.event.kind} without wrapping it`)
+    }
+
+    this.event = prep(options.event, this.user.pubkey)
+
+    for (const relay of options.relays) {
+      this.results[relay] = {
+        relay,
+        status: PublishStatus.Sending,
+        detail: "sending...",
+      }
+    }
+
+    this.controller.signal.addEventListener("abort", () => {
+      for (const relay of options.relays) {
+        this._setAborted({
+          relay,
+          status: PublishStatus.Aborted,
+          detail: "aborted",
+        })
+      }
+    })
+  }
+
+  get user() {
+    return User.require(this.options.client)
+  }
+
+  _fail(detail: string) {
+    for (const relay of this.options.relays) {
+      this.results[relay] = {
+        relay,
+        status: PublishStatus.Failure,
+        detail: detail,
+      }
+    }
+
+    this._notify()
+  }
+
+  _setPending = (result: PublishResult) => {
+    this.options.onPending?.(result)
+    this.results[result.relay] = result
+    this._notify()
+  }
+
+  _setTimeout = (result: PublishResult) => {
+    this.options.onTimeout?.(result)
+    this.results[result.relay] = result
+    this._notify()
+  }
+
+  _setAborted = (result: PublishResult) => {
+    this.options.onAborted?.(result)
+    this.results[result.relay] = result
+    this._notify()
+  }
+
+  async _publish(event: SignedEvent) {
+    // Wait if the thunk is to be delayed
+    if (this.options.delay) {
+      await sleep(this.options.delay)
+    }
+
+    // Skip publishing if aborted
+    if (this.controller.signal.aborted) {
+      return
+    }
+
+    // Send it off
+    await this.options.client.use(Network).publish({
+      ...this.options,
+      event,
+      onSuccess: (result: PublishResult) => {
+        this.options.onSuccess?.(result)
+        this.results[result.relay] = result
+        this._notify()
+      },
+      onFailure: (result: PublishResult) => {
+        this.options.onFailure?.(result)
+        this.results[result.relay] = result
+        this._notify()
+      },
+      onPending: this._setPending,
+      onTimeout: this._setTimeout,
+      onAborted: this._setAborted,
+      onComplete: (result: PublishResult) => {
+        if (result.status !== PublishStatus.Success) {
+          this.options.client.tracker.removeRelay(event.id, result.relay)
+        }
+
+        this.options.onComplete?.(result)
+        this._subs = []
+      },
+    })
+
+    // Notify the caller that we're done
+    this.complete.resolve()
+  }
+
+  async publish() {
+    // Handle abort immediately if possible
+    if (this.controller.signal.aborted) return
+
+    const {recipient} = this.options
+
+    // If we're sending it privately, wrap the event using nip 59
+    if (recipient) {
+      const wrapper = Nip01Signer.ephemeral()
+      const nip59 = new Nip59(this.user.signer, wrapper)
+
+      this.wrap = await nip59.wrap(recipient, this.event)
+
+      // If we're calculating pow, update the hash and re-sign
+      if (this.options.pow) {
+        this.wrap = await wrapper.sign(await makePow(this.wrap, this.options.pow).result, {
+          signal: AbortSignal.timeout(30_000),
+        })
+      }
+
+      this.options.client.wrapManager.add({recipient, wrap: this.wrap, rumor: this.event})
+
+      return this._publish(this.wrap)
+    }
+
+    // If the event has been signed, we're good to go
+    if (isSignedEvent(this.event)) {
+      if (this.options.pow) {
+        console.warn("Event is already signed, skipping proof of work calculation")
+      }
+
+      return this._publish(this.event)
+    }
+
+    // Allow for lazily signing/powing events in order to decrease apparent latency in the UI
+    // that results from waiting for remote signers
+    try {
+      if (this.options.pow) {
+        this.event = await makePow(this.event, this.options.pow).result
+      }
+
+      const signedEvent = await this.user.signer.sign(this.event, {
+        signal: AbortSignal.timeout(30_000),
+      })
+
+      // Update tracker and repository with the signed event since the id will have changed
+      if (this.options.pow) {
+        for (const url of this.options.relays) {
+          this.options.client.tracker.removeRelay(this.event.id, url)
+          this.options.client.tracker.track(signedEvent.id, url)
+        }
+      }
+
+      this.options.client.repository.removeEvent(this.event.id)
+      this.options.client.repository.publish(signedEvent)
+
+      return this._publish(signedEvent)
+    } catch (e: any) {
+      console.error("Failed to sign event", e)
+      return this._fail(String(e || "Failed to sign event"))
+    }
+  }
+
+  abort() {
+    this.controller.abort()
+  }
+}
+
+export class MergedThunk extends BaseThunk {
+  constructor(readonly thunks: Thunk[]) {
+    super()
+
+    const {Aborted, Failure, Timeout, Pending, Sending, Success} = PublishStatus
+    const relays = new Set(thunks.flatMap(thunk => thunk.options.relays))
+
+    for (const thunk of thunks) {
+      thunk.subscribe(() => {
+        this.results = {}
+
+        for (const relay of relays) {
+          for (const status of [Aborted, Failure, Timeout, Pending, Sending, Success]) {
+            const match = thunks.find(t => t.results[relay]?.status === status)
+
+            if (match) {
+              this.results[relay] = match.results[relay]!
+            }
+          }
+        }
+
+        this._notify()
+
+        if (thunks.every(t => t.isComplete())) {
+          this._subs = []
+        }
+      })
+    }
+  }
+
+  abort() {
+    this.thunks.forEach(thunk => thunk.abort())
+  }
+}
+
+/**
+ * Per-client thunk manager — the publish-side counterpart of `Network`. Owns
+ * the client's optimistic-publish `history` store and the `queue` that paces
+ * publishing. Reach it via `client.use(Thunks)`; `publish` fills in the client
+ * (the acting user is derived from it), enqueues the thunk (optimistically
+ * writing it to the repository), and returns it.
+ */
+export class Thunks {
+  history = writable<Thunk[]>([])
+
+  queue = new TaskQueue<Thunk>({
+    batchSize: 10,
+    batchDelay: 100,
+    processItem: (thunk: Thunk) => {
+      thunk.publish()
+    },
+  })
+
+  constructor(readonly ctx: IClient) {}
+
+  enqueue(thunk: Thunk) {
+    this.queue.push(thunk)
+
+    for (const url of thunk.options.relays) {
+      this.ctx.tracker.track(thunk.event.id, url)
+    }
+
+    this.ctx.repository.publish(thunk.event)
+    this.history.update($history => append(thunk, $history))
+
+    thunk.controller.signal.addEventListener("abort", () => {
+      if (thunk.wrap) {
+        this.ctx.wrapManager.remove(thunk.wrap.id)
+      } else {
+        this.ctx.repository.removeEvent(thunk.event.id)
+      }
+
+      this.history.update($history => remove(thunk, $history))
+    })
+  }
+
+  publish = (options: Omit<ThunkOptions, "client">) => {
+    const thunk = new Thunk({...options, client: this.ctx})
+
+    this.enqueue(thunk)
+
+    return thunk
+  }
+
+  // Publish as the user to their outbox (write) relays
+  publishToOutbox = (options: Omit<ThunkOptions, "client" | "relays">) =>
+    this.publish({
+      ...options,
+      relays: this.ctx.use(Router).FromUser().policy(addMinimalFallbacks).getUrls(),
+    })
+
+  retry = (thunk: BaseThunk) =>
+    thunk instanceof MergedThunk
+      ? new MergedThunk(thunk.thunks.map(t => this.publish(t.options)))
+      : this.publish((thunk as Thunk).options)
+
+  merge(thunks: BaseThunk[]) {
+    return new MergedThunk(Array.from(this.flatten(thunks)))
+  }
+
+  *flatten(thunks: BaseThunk[]): Iterable<Thunk> {
+    for (const thunk of thunks) {
+      if (thunk instanceof MergedThunk) {
+        yield* this.flatten(thunk.thunks)
+      } else if (thunk instanceof Thunk) {
+        yield thunk
+      }
+    }
+  }
+}

packages/client/src/topics.ts

@@ -0,0 +1,60 @@
+import {readable} from "svelte/store"
+import type {Readable} from "svelte/store"
+import {on} from "@welshman/lib"
+import {getTopicTagValues} from "@welshman/util"
+import type {RepositoryUpdate} from "@welshman/net"
+import {deriveItems} from "@welshman/store"
+import type {IClient} from "./client.js"
+
+export type Topic = {
+  name: string
+  count: number
+}
+
+/**
+ * Hashtag topics with occurrence counts, derived live from the client's
+ * repository tag index.
+ */
+export class Topics {
+  byName: Readable<Map<string, Topic>>
+  all: Readable<Topic[]>
+
+  constructor(readonly ctx: IClient) {
+    const topicsByName = new Map<string, Topic>()
+
+    const addTopic = (name: string) => {
+      const topic = topicsByName.get(name)
+
+      if (topic) {
+        topic.count++
+      } else {
+        topicsByName.set(name, {name, count: 1})
+      }
+    }
+
+    for (const tagString of ctx.repository.eventsByTag.keys()) {
+      if (tagString.startsWith("t:")) {
+        addTopic(tagString.slice(2).toLowerCase())
+      }
+    }
+
+    this.byName = readable(topicsByName, set =>
+      on(ctx.repository, "update", ({added}: RepositoryUpdate) => {
+        let dirty = false
+
+        for (const event of added) {
+          for (const name of getTopicTagValues(event.tags)) {
+            addTopic(name)
+            dirty = true
+          }
+        }
+
+        if (dirty) {
+          set(topicsByName)
+        }
+      }),
+    )
+
+    this.all = deriveItems(this.byName)
+  }
+}

packages/client/src/user.ts

@@ -0,0 +1,57 @@
+import type {StampedEvent} from "@welshman/util"
+import type {ISigner} from "@welshman/signer"
+import {LoggingSigner} from "./logging.js"
+import {getSignerFromSession} from "./session.js"
+import type {Session} from "./session.js"
+import type {IClient} from "./client.js"
+
+/**
+ * A single identity: a pubkey plus the signer that proves it. A `Client` is
+ * centered on (at most) one `User`, since the data a user can access depends
+ * entirely on who they are.
+ */
+export class User {
+  constructor(
+    readonly pubkey: string,
+    readonly signer: ISigner,
+  ) {}
+
+  static async fromSigner(signer: ISigner) {
+    if (!(signer instanceof LoggingSigner)) {
+      signer = new LoggingSigner(signer)
+    }
+
+    const pubkey = await signer.getPubkey()
+
+    return new User(pubkey, signer)
+  }
+
+  /**
+   * Reconstruct a signing user from a persisted session, using the registered
+   * session handlers to find the one for the session's method. The signer is
+   * wrapped in a `LoggingSigner` (observe it with `clientPolicyLogger`) and the
+   * pubkey is derived from it. Returns undefined when no handler is registered
+   * for the session's method.
+   */
+  static async fromSession(session: Session): Promise<User | undefined> {
+    const signer = await getSignerFromSession(session)
+
+    return signer ? User.fromSigner(signer) : undefined
+  }
+
+  /**
+   * Return the client's signed-in user, throwing if there isn't one — the entry
+   * point for actions that can only run as a user (publishing, signing).
+   */
+  static require(ctx: IClient): User {
+    if (!ctx.user) {
+      throw new Error("This action requires a signed-in user")
+    }
+
+    return ctx.user
+  }
+
+  sign = (event: StampedEvent) => this.signer.sign(event)
+
+  nip44EncryptToSelf = (payload: string) => this.signer.nip44.encrypt(this.pubkey, payload)
+}

packages/client/src/wot.ts

@@ -0,0 +1,219 @@
+import {readable, derived} from "svelte/store"
+import {max, throttle, addToMapKey, inc, dec} from "@welshman/lib"
+import {getListTags, getPubkeyTagValues} from "@welshman/util"
+import type {List} from "@welshman/util"
+import type {IClient} from "./client.js"
+import {projection} from "./clientData.js"
+import type {Projection} from "./clientData.js"
+import {FollowLists} from "./follows.js"
+import {MuteLists} from "./mutes.js"
+
+const listPubkeys = (list: List | undefined) => getPubkeyTagValues(getListTags(list))
+
+/**
+ * Web-of-trust scoring derived from follow and mute lists. The trust graph is
+ * built from the perspective of the client's user (or, with no user, the union
+ * of every known follow list) and updated reactively as lists change.
+ *
+ * The aggregate `*ByPubkey`/`graph`/`max` fields and the parameterized methods
+ * (`follows`, `wotScore`, …) are all `Projection`s — subscribe via `.$`, snapshot
+ * via `.get()`.
+ */
+export class Wot {
+  followersByPubkey: Projection<Map<string, Set<string>>>
+  mutersByPubkey: Projection<Map<string, Set<string>>>
+  graph: Projection<Map<string, number>>
+  max: Projection<number | undefined>
+
+  constructor(readonly ctx: IClient) {
+    const followersByPubkeyStore = readable(new Map<string, Set<string>>(), set =>
+      this.ctx.use(FollowLists).index.$.subscribe(
+        throttle(1000, lists => {
+          const $followersByPubkey = new Map<string, Set<string>>()
+
+          for (const list of lists.values()) {
+            for (const pubkey of getPubkeyTagValues(getListTags(list))) {
+              addToMapKey($followersByPubkey, pubkey, list.event.pubkey)
+            }
+          }
+
+          set($followersByPubkey)
+        }),
+      ),
+    )
+
+    const mutersByPubkeyStore = readable(new Map<string, Set<string>>(), set =>
+      this.ctx.use(MuteLists).index.$.subscribe(
+        throttle(1000, lists => {
+          const $mutersByPubkey = new Map<string, Set<string>>()
+
+          for (const list of lists.values()) {
+            for (const pubkey of getPubkeyTagValues(getListTags(list))) {
+              addToMapKey($mutersByPubkey, pubkey, list.event.pubkey)
+            }
+          }
+
+          set($mutersByPubkey)
+        }),
+      ),
+    )
+
+    const graphStore = readable(new Map<string, number>(), set => {
+      const rebuild = throttle(1000, () => {
+        const $followLists = this.ctx.use(FollowLists).index.get()
+        const $muteLists = this.ctx.use(MuteLists).index.get()
+        const $pubkey = this.ctx.user?.pubkey
+        const $graph = new Map<string, number>()
+        const roots = $pubkey ? listPubkeys($followLists.get($pubkey)) : Array.from($followLists.keys())
+
+        for (const follow of roots) {
+          for (const pubkey of listPubkeys($followLists.get(follow))) {
+            $graph.set(pubkey, inc($graph.get(pubkey)))
+          }
+
+          for (const pubkey of listPubkeys($muteLists.get(follow))) {
+            $graph.set(pubkey, dec($graph.get(pubkey)))
+          }
+        }
+
+        set($graph)
+      })
+
+      const unsubscribers = [
+        this.ctx.use(FollowLists).index.$.subscribe(rebuild),
+        this.ctx.use(MuteLists).index.$.subscribe(rebuild),
+      ]
+
+      return () => unsubscribers.forEach(unsubscribe => unsubscribe())
+    })
+
+    const maxStore = derived(graphStore, $g => max(Array.from($g.values())))
+
+    this.followersByPubkey = projection(followersByPubkeyStore)
+    this.mutersByPubkey = projection(mutersByPubkeyStore)
+    this.graph = projection(graphStore)
+    this.max = projection(maxStore)
+  }
+
+  follows = (pubkey: string): Projection<string[]> => {
+    const read = ($lists: ReadonlyMap<string, List>) => listPubkeys($lists.get(pubkey))
+
+    return projection(derived(this.ctx.use(FollowLists).index.$, read), () =>
+      read(this.ctx.use(FollowLists).index.get()),
+    )
+  }
+
+  mutes = (pubkey: string): Projection<string[]> => {
+    const read = ($lists: ReadonlyMap<string, List>) => listPubkeys($lists.get(pubkey))
+
+    return projection(derived(this.ctx.use(MuteLists).index.$, read), () =>
+      read(this.ctx.use(MuteLists).index.get()),
+    )
+  }
+
+  network = (pubkey: string): Projection<string[]> => {
+    const read = ($lists: ReadonlyMap<string, List>) => {
+      const pubkeys = new Set(listPubkeys($lists.get(pubkey)))
+      const network = new Set<string>()
+
+      for (const follow of pubkeys) {
+        for (const tpk of listPubkeys($lists.get(follow))) {
+          if (!pubkeys.has(tpk)) {
+            network.add(tpk)
+          }
+        }
+      }
+
+      return Array.from(network)
+    }
+
+    return projection(derived(this.ctx.use(FollowLists).index.$, read), () =>
+      read(this.ctx.use(FollowLists).index.get()),
+    )
+  }
+
+  followers = (pubkey: string): Projection<string[]> => {
+    const read = ($followers: ReadonlyMap<string, Set<string>>) =>
+      Array.from($followers.get(pubkey) || [])
+
+    return projection(derived(this.followersByPubkey.$, read), () =>
+      read(this.followersByPubkey.get()),
+    )
+  }
+
+  muters = (pubkey: string): Projection<string[]> => {
+    const read = ($muters: ReadonlyMap<string, Set<string>>) =>
+      Array.from($muters.get(pubkey) || [])
+
+    return projection(derived(this.mutersByPubkey.$, read), () => read(this.mutersByPubkey.get()))
+  }
+
+  followsWhoFollow = (pubkey: string, target: string): Projection<string[]> => {
+    const read = ($lists: ReadonlyMap<string, List>) =>
+      listPubkeys($lists.get(pubkey)).filter(other =>
+        listPubkeys($lists.get(other)).includes(target),
+      )
+
+    return projection(derived(this.ctx.use(FollowLists).index.$, read), () =>
+      read(this.ctx.use(FollowLists).index.get()),
+    )
+  }
+
+  followsWhoMute = (pubkey: string, target: string): Projection<string[]> => {
+    const read = ($follows: ReadonlyMap<string, List>, $mutes: ReadonlyMap<string, List>) =>
+      listPubkeys($follows.get(pubkey)).filter(other =>
+        listPubkeys($mutes.get(other)).includes(target),
+      )
+
+    return projection(
+      derived(
+        [this.ctx.use(FollowLists).index.$, this.ctx.use(MuteLists).index.$],
+        ([$follows, $mutes]) => read($follows, $mutes),
+      ),
+      () => read(this.ctx.use(FollowLists).index.get(), this.ctx.use(MuteLists).index.get()),
+    )
+  }
+
+  wotScore = (pubkey: string, target: string): Projection<number> => {
+    const read = (
+      $follows: ReadonlyMap<string, List>,
+      $mutes: ReadonlyMap<string, List>,
+      $followers: ReadonlyMap<string, Set<string>>,
+      $muters: ReadonlyMap<string, Set<string>>,
+    ) => {
+      let follows: string[]
+      let mutes: string[]
+
+      if (pubkey) {
+        const theirFollows = listPubkeys($follows.get(pubkey))
+
+        follows = theirFollows.filter(other => listPubkeys($follows.get(other)).includes(target))
+        mutes = theirFollows.filter(other => listPubkeys($mutes.get(other)).includes(target))
+      } else {
+        follows = Array.from($followers.get(target) || [])
+        mutes = Array.from($muters.get(target) || [])
+      }
+
+      return follows.length - mutes.length
+    }
+
+    return projection(
+      derived(
+        [
+          this.ctx.use(FollowLists).index.$,
+          this.ctx.use(MuteLists).index.$,
+          this.followersByPubkey.$,
+          this.mutersByPubkey.$,
+        ],
+        ([$follows, $mutes, $followers, $muters]) => read($follows, $mutes, $followers, $muters),
+      ),
+      () =>
+        read(
+          this.ctx.use(FollowLists).index.get(),
+          this.ctx.use(MuteLists).index.get(),
+          this.followersByPubkey.get(),
+          this.mutersByPubkey.get(),
+        ),
+    )
+  }
+}

packages/client/src/zappers.ts

@@ -0,0 +1,151 @@
+import type {Readable} from "svelte/store"
+import {
+  removeUndefined,
+  fetchJson,
+  bech32ToHex,
+  hexToBech32,
+  tryCatch,
+  batcher,
+  postJson,
+} from "@welshman/lib"
+import type {Maybe} from "@welshman/lib"
+import {getTagValue, getZapSplits, zapFromEvent} from "@welshman/util"
+import type {Zapper, Zap, TrustedEvent} from "@welshman/util"
+import {deriveDeduplicated, deriveDeduplicatedByValue} from "@welshman/store"
+import {LoadableData, projection} from "./clientData.js"
+import type {Projection} from "./clientData.js"
+import type {IClient} from "./client.js"
+import {Profiles} from "./profiles.js"
+
+/**
+ * Lightning zapper info, keyed by lnurl. A "local" loadable collection: items
+ * aren't nostr events, they're fetched over HTTP (either directly from each
+ * lnurl, or via a dufflepud proxy to protect user privacy). Depends on the
+ * profiles collection to resolve a pubkey's lnurl.
+ */
+export class Zappers extends LoadableData<Zapper> {
+  fetch = batcher(800, async (lnurls: string[]) => {
+    const result = new Map<string, Zapper>()
+    const valid = lnurls.filter(lnurl => lnurl.startsWith("lnurl1"))
+
+    const addZapper = (lnurl: string, info: any) => {
+      if (info) {
+        try {
+          result.set(lnurl, {...info, lnurl})
+        } catch (_e) {
+          // pass
+        }
+      }
+    }
+
+    if (this.ctx.config.dufflepudUrl) {
+      const hexUrls = valid.map(bech32ToHex)
+      const res: any = await tryCatch(
+        async () =>
+          await postJson(`${this.ctx.config.dufflepudUrl}/zapper/info`, {lnurls: hexUrls}),
+      )
+
+      for (const {lnurl, info} of res?.data || []) {
+        addZapper(hexToBech32("lnurl", lnurl), info)
+      }
+    } else {
+      await Promise.all(
+        valid.map(async lnurl => {
+          addZapper(lnurl, await tryCatch(async () => await fetchJson(bech32ToHex(lnurl))))
+        }),
+      )
+    }
+
+    for (const [lnurl, zapper] of result) {
+      this.set(lnurl, zapper)
+    }
+
+    return lnurls.map(lnurl => result.get(lnurl))
+  })
+
+  loadForPubkey = async (pubkey: string, relays: string[] = []) => {
+    const $profile = await this.ctx.use(Profiles).load(pubkey, relays)
+
+    return $profile?.lnurl ? this.load($profile.lnurl) : undefined
+  }
+
+  forPubkey = (pubkey: string, relays: string[] = []): Projection<Maybe<Zapper>> => {
+    this.loadForPubkey(pubkey, relays)
+
+    const read = ([$zappersByLnurl, $profile]: [ReadonlyMap<string, Zapper>, Maybe<{lnurl?: string}>]) =>
+      $profile?.lnurl ? $zappersByLnurl.get($profile.lnurl) : undefined
+
+    return projection(
+      deriveDeduplicated([this.index.$, this.ctx.use(Profiles).one(pubkey, relays)], read),
+      () => read([this.index.get(), this.ctx.use(Profiles).get(pubkey)]),
+    )
+  }
+
+  /**
+   * Resolve the zapper a zap receipt should be validated against. A receipt's
+   * `p` tag is the recipient (copied from the zap request), so we honor only
+   * receipts addressed to one of the parent's designated split recipients and
+   * load *that* recipient's zapper. The old lookup always used the first
+   * recipient's lnurl, which silently dropped legitimate zaps to any of the
+   * other split recipients.
+   */
+  loadZapperForZap = async (zapReceipt: TrustedEvent, parent: TrustedEvent) => {
+    const recipient = getTagValue("p", zapReceipt.tags)
+    const split = getZapSplits(parent).find(split => split.pubkey === recipient)
+
+    if (!split) return
+
+    return this.loadForPubkey(split.pubkey, removeUndefined([split.relay]))
+  }
+
+  validateZapReceipt = async (zapReceipt: TrustedEvent, parent: TrustedEvent) => {
+    const zapper = await this.loadZapperForZap(zapReceipt, parent)
+
+    return zapper ? zapFromEvent(zapReceipt, zapper) : undefined
+  }
+
+  validateZapReceipts = async (zapReceipts: TrustedEvent[], parent: TrustedEvent) =>
+    removeUndefined(
+      await Promise.all(zapReceipts.map(zapReceipt => this.validateZapReceipt(zapReceipt, parent))),
+    )
+
+  validZapReceipts = (zapReceipts: TrustedEvent[], parent: TrustedEvent): Projection<Zap[]> => {
+    const splits = getZapSplits(parent)
+    const profiles = this.ctx.use(Profiles)
+
+    // Ensure each recipient's profile (-> lnurl) and zapper are being loaded.
+    for (const split of splits) {
+      this.loadForPubkey(split.pubkey, removeUndefined([split.relay]))
+    }
+
+    const read = (values: any[]) => {
+      const $zappersByLnurl = values[0] as Map<string, Zapper>
+      const $profiles = values.slice(1) as Array<{lnurl?: string} | undefined>
+
+      const zapperByPubkey = new Map<string, Zapper>()
+
+      splits.forEach((split, i) => {
+        const lnurl = $profiles[i]?.lnurl
+        const zapper = lnurl ? $zappersByLnurl.get(lnurl) : undefined
+
+        if (zapper) zapperByPubkey.set(split.pubkey, zapper)
+      })
+
+      return removeUndefined(
+        zapReceipts.map(zapReceipt => {
+          const recipient = getTagValue("p", zapReceipt.tags)
+          const zapper = recipient ? zapperByPubkey.get(recipient) : undefined
+
+          return zapper ? zapFromEvent(zapReceipt, zapper) : undefined
+        }),
+      )
+    }
+
+    const stores: Readable<any>[] = [this.index.$, ...splits.map(split => profiles.one(split.pubkey))]
+
+    return projection(
+      deriveDeduplicatedByValue(stores, read),
+      () => read([this.index.get(), ...splits.map(split => profiles.get(split.pubkey))]),
+    )
+  }
+}

packages/client/tsconfig.build.json

@@ -0,0 +1,20 @@
+{
+  "extends": "../../tsconfig.build.json",
+
+  "compilerOptions": {
+    "outDir": "./dist",
+    "paths": {
+      "@welshman/feeds": ["../feeds/src/index.js"],
+      "@welshman/lib": ["../lib/src/index.js"],
+      "@welshman/net": ["../net/src/index.js"],
+      "@welshman/router": ["../router/src/index.js"],
+      "@welshman/signer": ["../signer/src/index.js"],
+      "@welshman/store": ["../store/src/index.js"],
+      "@welshman/util": ["../util/src/index.js"]
+    }
+  },
+
+  "include": [
+    "src/**/*"
+  ]
+}

packages/client/tsconfig.json

@@ -0,0 +1,3 @@
+{
+  "extends": "../../tsconfig.json"
+}

packages/feeds/src/compiler.ts

@@ -10,6 +10,7 @@ import {
 } from "@welshman/util"
 import {ISigner} from "@welshman/signer"
 import {AdapterContext} from "@welshman/net"
+import type {Router} from "@welshman/router"
 import {
   CreatedAtItem,
   RequestItem,
@@ -25,6 +26,7 @@ import {getFeedArgs, feedsFromTags} from "./utils.js"
 import {requestPage, requestDVM} from "./request.js"
 
 export type FeedCompilerOptions = {
+  router: Router
   signer?: ISigner
   signal?: AbortSignal
   context?: AdapterContext
@@ -157,6 +159,7 @@ export class FeedCompiler {
       items.map(({mappings, ...request}) =>
         requestDVM({
           ...request,
+          router: this.options.router,
           signer: this.options.signer,
           context: this.options.context,
           onResult: async (e: TrustedEvent) => {
@@ -267,6 +270,7 @@ export class FeedCompiler {
     const eventsByAddress = new Map<string, TrustedEvent>()
 
     await requestPage({
+      router: this.options.router,
       autoClose: true,
       signal: this.options.signal,
       context: this.options.context,
@@ -304,6 +308,7 @@ export class FeedCompiler {
       labelItems.map(({mappings, relays, ...filter}) =>
         requestPage({
           relays,
+          router: this.options.router,
           autoClose: true,
           signal: this.options.signal,
           context: this.options.context,

packages/feeds/src/controller.ts

@@ -159,6 +159,7 @@ export class FeedController {
       await requestPage(
         omitVals([undefined], {
           relays,
+          router: this.options.router,
           autoClose: true,
           filters: trimFilters(requestFilters),
           signal: this.options.signal,
@@ -360,6 +361,7 @@ export class FeedController {
       requestPage(
         omitVals([undefined], {
           relays,
+          router: this.options.router,
           signal,
           onEvent: (event: TrustedEvent) => onEvent?.(event),
           filters: trimFilters(requestFilters),

packages/feeds/src/request.ts

@@ -15,6 +15,7 @@ import {LOCAL_RELAY_URL, Tracker, AdapterContext, request, publish} from "@welsh
 
 export type RequestPageOptions = {
   filters: Filter[]
+  router: Router
   onEvent: (event: TrustedEvent) => void
   relays?: string[]
   tracker?: Tracker
@@ -25,6 +26,7 @@ export type RequestPageOptions = {
 
 export const requestPage = async ({
   filters,
+  router,
   onEvent,
   relays = [],
   tracker = new Tracker(),
@@ -49,14 +51,14 @@ export const requestPage = async ({
         threshold: 0.1,
         autoClose,
         filters: withSearch,
-        relays: Router.get().Search().getUrls(),
+        relays: router.Search().getUrls(),
       }),
     )
   }
 
   if (withoutSearch.length > 0) {
     promises.push(
-      ...getFilterSelections(filters).flatMap(({relays, filters}) =>
+      ...getFilterSelections(filters, router).flatMap(({relays, filters}) =>
         request({
           tracker,
           signal,
@@ -91,6 +93,7 @@ export const requestPage = async ({
 
 export type RequestDVMOptions = {
   kind: number
+  router: Router
   tags?: string[][]
   relays?: string[]
   signer?: ISigner
@@ -100,6 +103,7 @@ export type RequestDVMOptions = {
 
 export const requestDVM = async ({
   kind,
+  router,
   onResult,
   tags = [],
   relays = [],
@@ -110,10 +114,10 @@ export const requestDVM = async ({
     const events = await request({
       autoClose: true,
       filters: [{kinds: [RELAYS], authors: getPubkeyTagValues(tags)}],
-      relays: Router.get().Index().policy(addMinimalFallbacks).getUrls(),
+      relays: router.Index().policy(addMinimalFallbacks).getUrls(),
     })
 
-    relays = Router.get()
+    relays = router
       .FromRelays(events.flatMap(e => getRelaysFromList(readList(asDecryptedEvent(e)))))
       .policy(addMinimalFallbacks)
       .getUrls()

packages/lib/src/Tools.ts

@@ -1635,6 +1635,17 @@ export const member =
   (x: T) =>
     Array.from(xs).includes(x)
 
+/** Returns a function that checks whether all predicates pass */
+export const allPass =
+  <T>(...predicates: ((x: T) => unknown)[]) =>
+  (x: T) => predicates.every(predicate => predicate(x))
+
+/** Returns a function that checks whether some predicate passes */
+export const somePass =
+  <T>(...predicates: ((x: T) => unknown)[]) =>
+  (x: T) => predicates.some(predicate => predicate(x))
+
+
 // ----------------------------------------------------------------------------
 // Sets
 // ----------------------------------------------------------------------------

packages/net/src/adapter.ts

@@ -1,5 +1,5 @@
 import EventEmitter from "events"
-import {call, sleep, mergeRight, on} from "@welshman/lib"
+import {call, sleep, on} from "@welshman/lib"
 import {isRelayUrl, matchFilters, Filter} from "@welshman/util"
 import {LOCAL_RELAY_URL, Repository} from "./repository.js"
 import {
@@ -13,7 +13,7 @@ import {
 } from "./message.js"
 import {Socket, SocketEvent} from "./socket.js"
 import {Unsubscriber} from "./util.js"
-import {netContext, NetContext} from "./context.js"
+import type {NetContext} from "./context.js"
 
 export enum AdapterEvent {
   Receive = "receive",
@@ -150,9 +150,7 @@ export class MockAdapter extends AbstractAdapter {
 
 export type AdapterContext = Partial<NetContext>
 
-export const getAdapter = (url: string, adapterContext: AdapterContext = {}) => {
-  const context = mergeRight(netContext, adapterContext as any)
-
+export const getAdapter = (url: string, context: AdapterContext = {}) => {
   if (context.getAdapter) {
     const adapter = context.getAdapter(url, context)
 
@@ -162,10 +160,18 @@ export const getAdapter = (url: string, adapterContext: AdapterContext = {}) =>
   }
 
   if (url === LOCAL_RELAY_URL) {
+    if (!context.repository) {
+      throw new Error("LOCAL_RELAY_URL cannot be used without context.repository")
+    }
+
     return new LocalAdapter(context.repository)
   }
 
   if (isRelayUrl(url)) {
+    if (!context.pool) {
+      throw new Error("Unable to connect to relays without context.pool")
+    }
+
     return new SocketAdapter(context.pool.get(url))
   }
 

packages/net/src/context.ts

@@ -1,19 +1,11 @@
-import {verifyEvent, TrustedEvent} from "@welshman/util"
 import {AbstractAdapter} from "./adapter.js"
 import {Repository} from "./repository.js"
 import {Pool} from "./pool.js"
 
-export type NetContext = {
-  pool: Pool
-  repository: Repository
-  isEventValid: (event: TrustedEvent, url: string) => boolean
-  isEventDeleted: (event: TrustedEvent, url: string) => boolean
-  getAdapter?: (url: string, context: NetContext) => AbstractAdapter
-}
+export type AdapterFactory = (url: string, context: NetContext) => AbstractAdapter
 
-export const netContext: NetContext = {
-  pool: Pool.get(),
-  repository: Repository.get(),
-  isEventValid: (event, url) => verifyEvent(event),
-  isEventDeleted: (event, url) => netContext.repository.isDeleted(event),
+export type NetContext = {
+  pool?: Pool
+  repository?: Repository
+  getAdapter?: AdapterFactory
 }

packages/net/src/pool.ts

@@ -5,38 +5,15 @@ import {defaultSocketPolicies} from "./policy.js"
 
 export type PoolSubscription = (socket: Socket) => void
 
-export type PoolOptions = {
-  makeSocket?: (url: string) => Socket
-}
-
-export let poolSingleton: Pool
-
 export class Pool {
+  socketPolicies = [...defaultSocketPolicies]
   _data = new Map<string, Socket>()
   _subs: PoolSubscription[] = []
 
-  static get() {
-    if (!poolSingleton) {
-      poolSingleton = new Pool()
-    }
-
-    return poolSingleton
-  }
-
-  constructor(readonly options: PoolOptions = {}) {}
-
   has(url: string) {
     return this._data.has(normalizeRelayUrl(url))
   }
 
-  makeSocket(url: string) {
-    if (this.options.makeSocket) {
-      return this.options.makeSocket(url)
-    }
-
-    return new Socket(url, defaultSocketPolicies)
-  }
-
   get(_url: string): Socket {
     const url = normalizeRelayUrl(_url)
     const socket = this._data.get(url)
@@ -45,7 +22,7 @@ export class Pool {
       return socket
     }
 
-    const newSocket = this.makeSocket(url)
+    const newSocket = new Socket(url, this.socketPolicies)
 
     this._data.set(url, newSocket)
 

packages/net/src/repository.ts

@@ -26,8 +26,6 @@ export const LOCAL_RELAY_URL = "local://welshman.relay/"
 
 const getDay = (ts: number) => Math.floor(ts / DAY)
 
-export let repositorySingleton: Repository
-
 export type RepositoryUpdate = {
   added: TrustedEvent[]
   removed: Set<string>
@@ -61,14 +59,6 @@ export class Repository extends Emitter {
   deletes = new Map<string, {created_at: number; pubkey: string}[]>()
   expired = new Map<string, number>()
 
-  static get() {
-    if (!repositorySingleton) {
-      repositorySingleton = new Repository()
-    }
-
-    return repositorySingleton
-  }
-
   constructor() {
     super()
 
@@ -81,9 +71,7 @@ export class Repository extends Emitter {
     return Array.from(this.eventsById.values())
   }
 
-  load = (events: TrustedEvent[]) => {
-    const stale = new Set(this.eventsById.keys())
-
+  clear = () => {
     this.eventsById.clear()
     this.eventsByAddress.clear()
     this.eventsByTag.clear()
@@ -92,6 +80,13 @@ export class Repository extends Emitter {
     this.eventsByKind.clear()
     this.deletes.clear()
     this.expired.clear()
+    this.emit("clear")
+  }
+
+  load = (events: TrustedEvent[]) => {
+    const stale = new Set(this.eventsById.keys())
+
+    this.clear()
 
     const added = []
 

packages/net/src/request.ts

@@ -15,6 +15,7 @@ import {
   unionFilters,
   matchFilters,
   TrustedEvent,
+  verifyEvent,
   deduplicateEvents,
   getFilterResultCardinality,
 } from "@welshman/util"
@@ -27,7 +28,6 @@ import {
 } from "./message.js"
 import {getAdapter, AdapterContext, AdapterEvent} from "./adapter.js"
 import {SocketEvent, SocketStatus} from "./socket.js"
-import {netContext} from "./context.js"
 import {Tracker} from "./tracker.js"
 
 export type BaseRequestOptions = {
@@ -36,7 +36,6 @@ export type BaseRequestOptions = {
   context?: AdapterContext
   autoClose?: boolean
   isEventValid?: (event: TrustedEvent, url: string) => boolean
-  isEventDeleted?: (event: TrustedEvent, url: string) => boolean
   onEvent?: (event: TrustedEvent, url: string) => void
   onDeleted?: (event: unknown, url: string) => void
   onInvalid?: (event: unknown, url: string) => void
@@ -60,8 +59,8 @@ export const requestOne = (options: RequestOneOptions) => {
   const deferred = defer<TrustedEvent[]>()
   const tracker = options.tracker || new Tracker()
   const adapter = getAdapter(options.relay, options.context)
-  const isEventValid = options.isEventValid || netContext.isEventValid
-  const isEventDeleted = options.isEventDeleted || netContext.isEventDeleted
+  const isEventValid: (event: TrustedEvent, url: string) => boolean =
+    options.isEventValid || (event => verifyEvent(event))
 
   let closed = false
 
@@ -88,7 +87,7 @@ export const requestOne = (options: RequestOneOptions) => {
         if (ids.has(id)) {
           if (tracker.track(event.id, url)) {
             options.onDuplicate?.(event, url)
-          } else if (isEventDeleted(event, url)) {
+          } else if (options.context?.repository?.isDeleted(event)) {
             options.onDeleted?.(event, url)
           } else if (!isEventValid(event, url)) {
             options.onInvalid?.(event, url)
@@ -216,7 +215,6 @@ export type LoaderOptions = {
   threshold?: number
   context?: AdapterContext
   isEventValid?: (event: TrustedEvent, url: string) => boolean
-  isEventDeleted?: (event: TrustedEvent, url: string) => boolean
 }
 
 export type LoadOptions = {
@@ -320,7 +318,6 @@ export const makeLoader = (options: LoaderOptions) =>
         signal: signalsByRelay.get(relay),
         context: options.context,
         isEventValid: options.isEventValid,
-        isEventDeleted: options.isEventDeleted,
         onEvent: (event: TrustedEvent, url: string) => {
           for (const request of getOpenRequests()) {
             if (matchFilters(request.filters, event)) {
@@ -348,4 +345,4 @@ export const makeLoader = (options: LoaderOptions) =>
     return allRequests.map(r => resultsByRequest.get(r) || [])
   }) as Loader
 
-export const load = makeLoader({delay: 200, timeout: 3000, threshold: 0.5})
+export const load = makeLoader({delay: 30, timeout: 3000, threshold: 0.5})

packages/net/src/wrapManager.ts

@@ -41,10 +41,15 @@ export class WrapManager extends Emitter {
 
   // Adding/importing
 
-  load = (wrapItems: WrapItem[]) => {
+  clear = () => {
     this._wrapIndex.clear()
     this._rumorIndex.clear()
     this._recipientIndex.clear()
+    this.emit("load")
+  }
+
+  load = (wrapItems: WrapItem[]) => {
+    this.clear()
 
     for (const wrapItem of wrapItems) {
       this._add(wrapItem)

packages/router/src/index.ts

@@ -2,7 +2,6 @@ import {
   nth,
   uniq,
   intersection,
-  mergeLeft,
   first,
   clamp,
   sortBy,
@@ -28,14 +27,10 @@ import {
   normalizeRelayUrl,
   TrustedEvent,
   Filter,
-  readList,
   getAncestorTags,
-  asDecryptedEvent,
-  getRelaysFromList,
   getPubkeyTags,
   RelayMode,
 } from "@welshman/util"
-import {Repository} from "@welshman/net"
 
 export const INDEXED_KINDS = [PROFILE, RELAYS, MESSAGING_RELAYS, FOLLOWS]
 
@@ -114,30 +109,8 @@ export const addMaximalFallbacks = (count: number, limit: number) => limit - cou
 
 // Router class
 
-export const routerContext: RouterOptions = {
-  getPubkeyRelays: (pubkey: string, mode?: RelayMode) => {
-    return uniq(
-      Repository.get()
-        .query([{kinds: [RELAYS], authors: [pubkey]}])
-        .flatMap(event => getRelaysFromList(readList(asDecryptedEvent(event)), mode)),
-    )
-  },
-}
-
 export class Router {
-  readonly options: RouterOptions
-
-  static configure(options: RouterOptions) {
-    Object.assign(routerContext, options)
-  }
-
-  static get() {
-    return new Router(routerContext)
-  }
-
-  constructor(options: RouterOptions) {
-    this.options = mergeLeft(options, routerContext)
-  }
+  constructor(readonly options: RouterOptions) {}
 
   // Utilities derived from options
 
@@ -357,58 +330,58 @@ export class RouterScenario {
 
 type FilterScenario = {filter: Filter; scenario: RouterScenario}
 
-type FilterSelectionRule = (filter: Filter) => FilterScenario[]
+type FilterSelectionRule = (filter: Filter, router: Router) => FilterScenario[]
 
-export const getFilterSelectionsForSearch = (filter: Filter) => {
+export const getFilterSelectionsForSearch = (filter: Filter, router: Router) => {
   if (!filter.search) return []
 
-  const relays = routerContext.getSearchRelays?.() || []
+  const relays = router.options.getSearchRelays?.() || []
 
-  return [{filter, scenario: Router.get().FromRelays(relays).weight(10)}]
+  return [{filter, scenario: router.FromRelays(relays).weight(10)}]
 }
 
-export const getFilterSelectionsForWraps = (filter: Filter) => {
+export const getFilterSelectionsForWraps = (filter: Filter, router: Router) => {
   if (!filter.kinds?.includes(WRAP) || filter.authors) return []
 
   return [
     {
       filter: {...filter, kinds: [WRAP]},
-      scenario: Router.get().MessagesForUser(),
+      scenario: router.MessagesForUser(),
     },
   ]
 }
 
-export const getFilterSelectionsForIndexedKinds = (filter: Filter) => {
+export const getFilterSelectionsForIndexedKinds = (filter: Filter, router: Router) => {
   const kinds = intersection(INDEXED_KINDS, filter.kinds || [])
 
   if (kinds.length === 0) return []
 
-  const relays = routerContext.getIndexerRelays?.() || []
+  const relays = router.options.getIndexerRelays?.() || []
 
   return [
     {
       filter: {...filter, kinds},
-      scenario: Router.get().FromRelays(relays),
+      scenario: router.FromRelays(relays),
     },
   ]
 }
 
-export const getFilterSelectionsForAuthors = (filter: Filter) => {
+export const getFilterSelectionsForAuthors = (filter: Filter, router: Router) => {
   if (!filter.authors) return []
 
   const chunkCount = clamp([1, 30], Math.round(filter.authors.length / 30))
 
   return chunks(chunkCount, filter.authors).map(authors => ({
     filter: {...filter, authors},
-    scenario: Router.get().FromPubkeys(authors),
+    scenario: router.FromPubkeys(authors),
   }))
 }
 
-export const getFilterSelectionsForUser = (filter: Filter) => [
-  {filter, scenario: Router.get().ForUser().weight(0.2)},
+export const getFilterSelectionsForUser = (filter: Filter, router: Router) => [
+  {filter, scenario: router.ForUser().weight(0.2)},
 ]
 
-export const defaultFilterSelectionRules = [
+export const defaultFilterSelectionRules: FilterSelectionRule[] = [
   getFilterSelectionsForSearch,
   getFilterSelectionsForWraps,
   getFilterSelectionsForIndexedKinds,
@@ -418,13 +391,14 @@ export const defaultFilterSelectionRules = [
 
 export const getFilterSelections = (
   filters: Filter[],
+  router: Router,
   rules: FilterSelectionRule[] = defaultFilterSelectionRules,
 ): RelaysAndFilters[] => {
   const filtersById = new Map<string, Filter>()
   const scenariosById = new Map<string, RouterScenario[]>()
 
   for (const filter of filters) {
-    for (const filterScenario of rules.flatMap(rule => rule(filter))) {
+    for (const filterScenario of rules.flatMap(rule => rule(filter, router))) {
       const id = getFilterId(filterScenario.filter)
 
       filtersById.set(id, filterScenario.filter)
@@ -435,9 +409,7 @@ export const getFilterSelections = (
   const result = []
 
   for (const [id, filter] of filtersById.entries()) {
-    const scenario = Router.get()
-      .merge(scenariosById.get(id) || [])
-      .policy(addMinimalFallbacks)
+    const scenario = router.merge(scenariosById.get(id) || []).policy(addMinimalFallbacks)
 
     result.push({filters: [filter], relays: scenario.getUrls()})
   }

packages/util/src/Handles.ts

@@ -0,0 +1,47 @@
+import {fetchJson, last} from "@welshman/lib"
+import type {Maybe} from "@welshman/lib"
+
+/**
+ * NIP-05: mapping nostr public keys to DNS-based internet identifiers (e.g.
+ * `name@example.com`), resolved via each domain's `/.well-known/nostr.json`.
+ */
+export type Handle = {
+  nip05: string
+  pubkey?: string
+  nip46?: string[]
+  relays?: string[]
+}
+
+export async function queryProfile(nip05: string): Promise<Maybe<Handle>> {
+  const parts = nip05.split("@")
+  const name = parts.length > 1 ? parts[0] : "_"
+  const domain = last(parts)
+
+  try {
+    const {
+      names,
+      relays = {},
+      nip46 = {},
+    } = await fetchJson(`https://${domain}/.well-known/nostr.json?name=${name}`)
+
+    const pubkey = names[name]
+
+    if (!pubkey) {
+      return undefined
+    }
+
+    return {
+      nip05,
+      pubkey,
+      nip46: nip46[pubkey],
+      relays: relays[pubkey],
+    }
+  } catch (_e) {
+    return undefined
+  }
+}
+
+export const displayNip05 = (nip05: string) =>
+  nip05?.startsWith("_@") ? last(nip05.split("@")) : nip05
+
+export const displayHandle = (handle: Handle) => displayNip05(handle.nip05)

packages/util/src/Kinds.ts

@@ -123,7 +123,7 @@ export const ROOM_JOIN = 9021
 export const ROOM_LEAVE = 9022
 export const ZAP_GOAL = 9041
 export const ZAP_REQUEST = 9734
-export const ZAP_RESPONSE = 9735
+export const ZAP_RECEIPT = 9735
 export const HIGHLIGHT = 9802
 export const MUTES = 10000
 export const PINS = 10001

packages/util/src/Zaps.ts

@@ -1,5 +1,5 @@
-import {now, tryCatch, fetchJson, hexToBech32, fromPairs} from "@welshman/lib"
-import {ZAP_RESPONSE, ZAP_REQUEST} from "./Kinds.js"
+import {now, tryCatch, fetchJson, hexToBech32, fromPairs, sum, allPass, nthEq, nth} from "@welshman/lib"
+import {ZAP_RECEIPT, ZAP_REQUEST} from "./Kinds.js"
 import {getTagValue} from "./Tags.js"
 import type {Filter} from "./Filters.js"
 import type {TrustedEvent, SignedEvent} from "./Events.js"
@@ -138,6 +138,79 @@ export const zapFromEvent = (response: TrustedEvent, zapper: Zapper | undefined)
   return zap
 }
 
+/**
+ * A single recipient of an event's zaps, parsed from a NIP-57 Appendix G `zap`
+ * tag of the form `["zap", <pubkey>, <relay hint>, <weight>]`.
+ */
+export type ZapSplit = {
+  pubkey: string
+  relay?: string
+  weight: number
+}
+
+export type ZapSplitAmount = ZapSplit & {amount: number}
+
+const parseWeight = (weight: string | undefined) => {
+  const n = weight === undefined ? NaN : parseFloat(weight)
+
+  return Number.isFinite(n) && n > 0 ? n : 0
+}
+
+/**
+ * Resolve an event's zap-split recipients per NIP-57 Appendix G:
+ *
+ * - With no `zap` tags the whole zap goes to the event's author.
+ * - If no recipient carries a weight, the zap is split equally (weight 1 each).
+ * - If weights are only partially present, unweighted recipients drop to weight
+ *   0 (i.e. they should not be zapped).
+ *
+ * Weight-0 recipients are still returned so callers have the full recipient set;
+ * they simply receive 0 from `splitZapAmount`.
+ */
+export const getZapSplits = (event: TrustedEvent): ZapSplit[] => {
+  const zapTags = event.tags.filter(allPass(nthEq(0, "zap"), nth(1)))
+
+  if (zapTags.length === 0) {
+    return [{pubkey: event.pubkey, weight: 1}]
+  }
+
+  const anyWeighted = zapTags.some(nth(3))
+
+  return zapTags.map(([, pubkey, relay, weight]) => ({
+    pubkey,
+    relay: relay || undefined,
+    weight: anyWeighted ? parseWeight(weight) : 1,
+  }))
+}
+
+/**
+ * Divide `total` (in any integer unit, e.g. millisats) across an event's
+ * zap-split recipients proportionally to their weights. Any rounding remainder
+ * is handed to the highest-weighted recipient so the parts sum back to exactly
+ * `total`. If every weight is 0, nobody is zapped.
+ */
+export const splitZapAmount = (event: TrustedEvent, total: number): ZapSplitAmount[] => {
+  const splits = getZapSplits(event)
+  const totalWeight = sum(splits.map(split => split.weight))
+
+  if (totalWeight === 0) {
+    return splits.map(split => ({...split, amount: 0}))
+  }
+
+  const amounts = splits.map(split => Math.floor((total * split.weight) / totalWeight))
+
+  let maxIndex = 0
+  splits.forEach((split, i) => {
+    if (split.weight > splits[maxIndex].weight) {
+      maxIndex = i
+    }
+  })
+
+  amounts[maxIndex] += total - sum(amounts)
+
+  return splits.map((split, i) => ({...split, amount: amounts[i]}))
+}
+
 export type ZapRequestParams = {
   msats: number
   zapper: Zapper
@@ -201,7 +274,7 @@ export const getZapResponseFilter = ({zapper, pubkey, eventId}: ZapResponseFilte
   }
 
   const filter: Filter = {
-    kinds: [ZAP_RESPONSE],
+    kinds: [ZAP_RECEIPT],
     authors: [zapper.nostrPubkey],
     since: now() - 30,
     "#p": [pubkey],

packages/util/src/index.ts

@@ -4,6 +4,7 @@ export * from "./Encryptable.js"
 export * from "./Events.js"
 export * from "./Filters.js"
 export * from "./Handler.js"
+export * from "./Handles.js"
 export * from "./Keys.js"
 export * from "./Kinds.js"
 export * from "./Links.js"

pnpm-lock.yaml

@@ -110,6 +110,52 @@ importers:
         specifier: ~5.8.0
         version: 5.8.2
 
+  packages/client:
+    dependencies:
+      fuse.js:
+        specifier: ^7.0.0
+        version: 7.1.0
+      throttle-debounce:
+        specifier: ^5.0.2
+        version: 5.0.2
+    devDependencies:
+      '@pomade/core':
+        specifier: ^0.2.1
+        version: 0.2.1(@frostr/bifrost@1.0.7(typescript@5.8.2))(@noble/hashes@2.0.1)(@welshman/lib@packages+lib)(@welshman/net@packages+net)(@welshman/signer@packages+signer)(@welshman/util@packages+util)(nostr-tools@2.19.4(typescript@5.8.2))
+      '@types/throttle-debounce':
+        specifier: ^5.0.2
+        version: 5.0.2
+      '@welshman/feeds':
+        specifier: workspace:*
+        version: link:../feeds
+      '@welshman/lib':
+        specifier: workspace:*
+        version: link:../lib
+      '@welshman/net':
+        specifier: workspace:*
+        version: link:../net
+      '@welshman/router':
+        specifier: workspace:*
+        version: link:../router
+      '@welshman/signer':
+        specifier: workspace:*
+        version: link:../signer
+      '@welshman/store':
+        specifier: workspace:*
+        version: link:../store
+      '@welshman/util':
+        specifier: workspace:*
+        version: link:../util
+      rimraf:
+        specifier: ~6.0.0
+        version: 6.0.1
+      svelte:
+        specifier: ^5.39.12
+        version: 5.46.3
+      typescript:
+        specifier: ~5.8.0
+        version: 5.8.2
+
   packages/content:
     dependencies:
       '@braintree/sanitize-url':