working rss feed to nostr publish

node_modules/nostr-tools/lib/esm/nip13.js

@@ -0,0 +1,85 @@
+// event.ts
+import { schnorr } from "@noble/curves/secp256k1";
+import { sha256 } from "@noble/hashes/sha256";
+import { bytesToHex } from "@noble/hashes/utils";
+
+// utils.ts
+var utf8Decoder = new TextDecoder("utf-8");
+var utf8Encoder = new TextEncoder();
+
+// event.ts
+var verifiedSymbol = Symbol("verified");
+function serializeEvent(evt) {
+  if (!validateEvent(evt))
+    throw new Error("can't serialize event with wrong or missing properties");
+  return JSON.stringify([0, evt.pubkey, evt.created_at, evt.kind, evt.tags, evt.content]);
+}
+function getEventHash(event) {
+  let eventHash = sha256(utf8Encoder.encode(serializeEvent(event)));
+  return bytesToHex(eventHash);
+}
+var isRecord = (obj) => obj instanceof Object;
+function validateEvent(event) {
+  if (!isRecord(event))
+    return false;
+  if (typeof event.kind !== "number")
+    return false;
+  if (typeof event.content !== "string")
+    return false;
+  if (typeof event.created_at !== "number")
+    return false;
+  if (typeof event.pubkey !== "string")
+    return false;
+  if (!event.pubkey.match(/^[a-f0-9]{64}$/))
+    return false;
+  if (!Array.isArray(event.tags))
+    return false;
+  for (let i = 0; i < event.tags.length; i++) {
+    let tag = event.tags[i];
+    if (!Array.isArray(tag))
+      return false;
+    for (let j = 0; j < tag.length; j++) {
+      if (typeof tag[j] === "object")
+        return false;
+    }
+  }
+  return true;
+}
+
+// nip13.ts
+function getPow(hex) {
+  let count = 0;
+  for (let i = 0; i < hex.length; i++) {
+    const nibble = parseInt(hex[i], 16);
+    if (nibble === 0) {
+      count += 4;
+    } else {
+      count += Math.clz32(nibble) - 28;
+      break;
+    }
+  }
+  return count;
+}
+function minePow(unsigned, difficulty) {
+  let count = 0;
+  const event = unsigned;
+  const tag = ["nonce", count.toString(), difficulty.toString()];
+  event.tags.push(tag);
+  while (true) {
+    const now = Math.floor(new Date().getTime() / 1e3);
+    if (now !== event.created_at) {
+      count = 0;
+      event.created_at = now;
+    }
+    tag[1] = (++count).toString();
+    event.id = getEventHash(event);
+    if (getPow(event.id) >= difficulty) {
+      break;
+    }
+  }
+  return event;
+}
+export {
+  getPow,
+  minePow
+};