Move key stuff to util, add pow util

packages/util/src/Keys.ts

@@ -0,0 +1,46 @@
+import {schnorr} from "@noble/curves/secp256k1"
+import {bytesToHex, hexToBytes} from "@noble/curves/abstract/utils"
+import {generateSecretKey, getPublicKey, getEventHash} from "nostr-tools/pure"
+import {now} from "@welshman/lib"
+import {
+  HashedEvent,
+  EventTemplate,
+  StampedEvent,
+  OwnedEvent,
+  isStampedEvent,
+  isOwnedEvent,
+  isHashedEvent,
+} from "./Events.js"
+
+export const makeSecret = () => bytesToHex(generateSecretKey())
+
+export const getPubkey = (secret: string) => getPublicKey(hexToBytes(secret))
+
+export const getHash = (event: OwnedEvent) => getEventHash(event)
+
+export const getSig = (event: HashedEvent, secret: string) =>
+  bytesToHex(schnorr.sign(event.id, secret))
+
+export const stamp = (event: EventTemplate, created_at = now()) => ({...event, created_at})
+
+export const own = (event: StampedEvent, pubkey: string) => ({...event, pubkey})
+
+export const hash = (event: OwnedEvent) => ({...event, id: getHash(event)})
+
+export const sign = (event: HashedEvent, secret: string) => ({...event, sig: getSig(event, secret)})
+
+export const prep = (event: EventTemplate, pubkey: string, created_at = now()) => {
+  if (!isStampedEvent(event as StampedEvent)) {
+    event = stamp(event, created_at)
+  }
+
+  if (!isOwnedEvent(event as OwnedEvent)) {
+    event = own(event as StampedEvent, pubkey)
+  }
+
+  if (!isHashedEvent(event as HashedEvent)) {
+    event = hash(event as OwnedEvent)
+  }
+
+  return event as HashedEvent
+}

packages/util/src/Kinds.ts

@@ -139,9 +139,16 @@ export const MESSAGING_RELAYS = 10050
 export const BLOSSOM_SERVERS = 10063
 export const FILE_SERVERS = 10096
 export const RELAY_MEMBERS = 13534
+export const PROMENADE_REGISTER_ACCOUNT = 16430
 export const LIGHTNING_PUB_RPC = 21000
 export const CLIENT_AUTH = 22242
 export const BLOSSOM_AUTH = 24242
+export const PROMENADE_SHARD_SHARE = 26428
+export const PROMENADE_SHARD_ACK = 26429
+export const PROMENADE_CONFIG = 26430
+export const PROMENADE_COMMIT = 26431
+export const PROMENADE_REQUEST = 26432
+export const PROMENADE_RESULT = 26433
 export const RELAY_JOIN = 28934
 export const RELAY_INVITE = 28935
 export const RELAY_LEAVE = 28936

packages/util/src/Pow.ts

@@ -0,0 +1,151 @@
+import {call} from "@welshman/lib"
+import {getTag} from "./Tags.js"
+import {makeSecret, own, getPubkey} from "./Keys.js"
+import {makeEvent, OwnedEvent, HashedEvent} from "./Events.js"
+
+export let benchmark = 0
+
+export const benchmarkDifficulty = 15
+
+export const estimateWork = (difficulty: number) =>
+  Math.ceil(benchmark * Math.pow(2, difficulty - benchmarkDifficulty))
+
+const workerCode = `
+// Utility function to convert bytes to hex
+function bytesToHex(bytes) {
+  return Array.from(bytes)
+    .map(b => b.toString(16).padStart(2, '0'))
+    .join('')
+}
+
+// Utility function to calculate proof of work from hash
+function getPow(id) {
+  let count = 0
+
+  for (let i = 0; i < 32; i++) {
+    const nibble = id[i]
+    if (nibble === 0) {
+      count += 8
+    } else {
+      count += Math.clz32(nibble) - 24
+      break
+    }
+  }
+
+  return count
+}
+
+self.onmessage = async function (ev) {
+  const {event, difficulty, start = 0, step = 1} = ev.data
+
+  let count = start
+
+  const tag = ["nonce", count.toString(), difficulty.toString()]
+
+  event.tags.push(tag)
+
+  const encoder = new TextEncoder()
+
+  while (true) {
+    count += step
+    tag[1] = count.toString()
+
+    // Create the event array as specified by NIP-01
+    const eventArray = [0, event.pubkey, event.created_at, event.kind, event.tags, event.content]
+    const eventString = JSON.stringify(eventArray)
+
+    // Use Web Crypto API for SHA-256 hashing
+    const messageBuffer = encoder.encode(eventString)
+    const hashBuffer = await crypto.subtle.digest('SHA-256', messageBuffer)
+    const hashArray = new Uint8Array(hashBuffer)
+
+    const pow = getPow(hashArray)
+
+    if (pow >= difficulty) {
+      event.id = bytesToHex(hashArray)
+      break
+    }
+  }
+
+  postMessage(event)
+}
+`
+
+const createPowWorker = (): Worker => {
+  if (typeof Worker === "undefined") {
+    throw new Error("Worker is not available in this environment")
+  }
+
+  const blob = new Blob([workerCode], {type: "application/javascript"})
+  const url = URL.createObjectURL(blob)
+  const worker = new Worker(url, {type: "module"})
+
+  // Clean up the blob URL after worker is created
+  URL.revokeObjectURL(url)
+
+  return worker
+}
+
+export type ProofOfWork = {
+  worker: Worker
+  result: Promise<HashedEvent>
+}
+
+export const makePow = (event: OwnedEvent, difficulty: number): ProofOfWork => {
+  const worker = createPowWorker()
+
+  const result = new Promise<HashedEvent>((resolve, reject) => {
+    worker.onmessage = (e: MessageEvent<HashedEvent>) => {
+      resolve(e.data)
+      worker.terminate()
+    }
+
+    worker.onerror = (e: ErrorEvent) => {
+      reject(e.error || e)
+      worker.terminate()
+    }
+
+    worker.postMessage({difficulty, event})
+  })
+
+  return {worker, result}
+}
+
+export const getPow = (event: HashedEvent): number => {
+  const difficulty = parseInt(getTag("nonce", event.tags)?.[2] || "")
+
+  if (isNaN(difficulty)) return 0
+
+  let count = 0
+
+  // Convert hex string to array of bytes
+  for (let i = 0; i < event.id.length; i += 2) {
+    const byte = parseInt(event.id.slice(i, i + 2), 16)
+    if (byte === 0) {
+      count += 8
+    } else {
+      count += Math.clz32(byte) - 24
+      break
+    }
+  }
+
+  return count >= difficulty ? difficulty : 0
+}
+
+// Generate a simple pow to estimate the device capacities
+call(() => {
+  // Only run benchmark if Worker is available (browser environment)
+  if (typeof Worker === "undefined") {
+    return
+  }
+
+  const secret = makeSecret()
+  const pubkey = getPubkey(secret)
+  const event = own(makeEvent(1, {}), pubkey)
+  const pow = makePow(event, benchmarkDifficulty)
+  const start = Date.now()
+
+  pow.result.then(() => {
+    benchmark = Date.now() - start
+  })
+})

packages/util/src/index.ts

@@ -4,12 +4,14 @@ export * from "./Encryptable.js"
 export * from "./Events.js"
 export * from "./Filters.js"
 export * from "./Handler.js"
+export * from "./Keys.js"
 export * from "./Kinds.js"
 export * from "./Links.js"
 export * from "./List.js"
 export * from "./Nip42.js"
 export * from "./Nip86.js"
 export * from "./Nip98.js"
+export * from "./Pow.js"
 export * from "./Profile.js"
 export * from "./Relay.js"
 export * from "./Room.js"