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
+}