working rss feed to nostr publish

node_modules/nostr-tools/lib/esm/nip19.js

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+// nip19.ts
+import { bytesToHex, concatBytes, hexToBytes } from "@noble/hashes/utils";
+import { bech32 } from "@scure/base";
+
+// utils.ts
+var utf8Decoder = new TextDecoder("utf-8");
+var utf8Encoder = new TextEncoder();
+
+// nip19.ts
+var Bech32MaxSize = 5e3;
+var BECH32_REGEX = /[\x21-\x7E]{1,83}1[023456789acdefghjklmnpqrstuvwxyz]{6,}/;
+function integerToUint8Array(number) {
+  const uint8Array = new Uint8Array(4);
+  uint8Array[0] = number >> 24 & 255;
+  uint8Array[1] = number >> 16 & 255;
+  uint8Array[2] = number >> 8 & 255;
+  uint8Array[3] = number & 255;
+  return uint8Array;
+}
+function decode(nip19) {
+  let { prefix, words } = bech32.decode(nip19, Bech32MaxSize);
+  let data = new Uint8Array(bech32.fromWords(words));
+  switch (prefix) {
+    case "nprofile": {
+      let tlv = parseTLV(data);
+      if (!tlv[0]?.[0])
+        throw new Error("missing TLV 0 for nprofile");
+      if (tlv[0][0].length !== 32)
+        throw new Error("TLV 0 should be 32 bytes");
+      return {
+        type: "nprofile",
+        data: {
+          pubkey: bytesToHex(tlv[0][0]),
+          relays: tlv[1] ? tlv[1].map((d) => utf8Decoder.decode(d)) : []
+        }
+      };
+    }
+    case "nevent": {
+      let tlv = parseTLV(data);
+      if (!tlv[0]?.[0])
+        throw new Error("missing TLV 0 for nevent");
+      if (tlv[0][0].length !== 32)
+        throw new Error("TLV 0 should be 32 bytes");
+      if (tlv[2] && tlv[2][0].length !== 32)
+        throw new Error("TLV 2 should be 32 bytes");
+      if (tlv[3] && tlv[3][0].length !== 4)
+        throw new Error("TLV 3 should be 4 bytes");
+      return {
+        type: "nevent",
+        data: {
+          id: bytesToHex(tlv[0][0]),
+          relays: tlv[1] ? tlv[1].map((d) => utf8Decoder.decode(d)) : [],
+          author: tlv[2]?.[0] ? bytesToHex(tlv[2][0]) : void 0,
+          kind: tlv[3]?.[0] ? parseInt(bytesToHex(tlv[3][0]), 16) : void 0
+        }
+      };
+    }
+    case "naddr": {
+      let tlv = parseTLV(data);
+      if (!tlv[0]?.[0])
+        throw new Error("missing TLV 0 for naddr");
+      if (!tlv[2]?.[0])
+        throw new Error("missing TLV 2 for naddr");
+      if (tlv[2][0].length !== 32)
+        throw new Error("TLV 2 should be 32 bytes");
+      if (!tlv[3]?.[0])
+        throw new Error("missing TLV 3 for naddr");
+      if (tlv[3][0].length !== 4)
+        throw new Error("TLV 3 should be 4 bytes");
+      return {
+        type: "naddr",
+        data: {
+          identifier: utf8Decoder.decode(tlv[0][0]),
+          pubkey: bytesToHex(tlv[2][0]),
+          kind: parseInt(bytesToHex(tlv[3][0]), 16),
+          relays: tlv[1] ? tlv[1].map((d) => utf8Decoder.decode(d)) : []
+        }
+      };
+    }
+    case "nrelay": {
+      let tlv = parseTLV(data);
+      if (!tlv[0]?.[0])
+        throw new Error("missing TLV 0 for nrelay");
+      return {
+        type: "nrelay",
+        data: utf8Decoder.decode(tlv[0][0])
+      };
+    }
+    case "nsec":
+    case "npub":
+    case "note":
+      return { type: prefix, data: bytesToHex(data) };
+    default:
+      throw new Error(`unknown prefix ${prefix}`);
+  }
+}
+function parseTLV(data) {
+  let result = {};
+  let rest = data;
+  while (rest.length > 0) {
+    let t = rest[0];
+    let l = rest[1];
+    if (!l)
+      throw new Error(`malformed TLV ${t}`);
+    let v = rest.slice(2, 2 + l);
+    rest = rest.slice(2 + l);
+    if (v.length < l)
+      throw new Error(`not enough data to read on TLV ${t}`);
+    result[t] = result[t] || [];
+    result[t].push(v);
+  }
+  return result;
+}
+function nsecEncode(hex) {
+  return encodeBytes("nsec", hex);
+}
+function npubEncode(hex) {
+  return encodeBytes("npub", hex);
+}
+function noteEncode(hex) {
+  return encodeBytes("note", hex);
+}
+function encodeBech32(prefix, data) {
+  let words = bech32.toWords(data);
+  return bech32.encode(prefix, words, Bech32MaxSize);
+}
+function encodeBytes(prefix, hex) {
+  let data = hexToBytes(hex);
+  return encodeBech32(prefix, data);
+}
+function nprofileEncode(profile) {
+  let data = encodeTLV({
+    0: [hexToBytes(profile.pubkey)],
+    1: (profile.relays || []).map((url) => utf8Encoder.encode(url))
+  });
+  return encodeBech32("nprofile", data);
+}
+function neventEncode(event) {
+  let kindArray;
+  if (event.kind != void 0) {
+    kindArray = integerToUint8Array(event.kind);
+  }
+  let data = encodeTLV({
+    0: [hexToBytes(event.id)],
+    1: (event.relays || []).map((url) => utf8Encoder.encode(url)),
+    2: event.author ? [hexToBytes(event.author)] : [],
+    3: kindArray ? [new Uint8Array(kindArray)] : []
+  });
+  return encodeBech32("nevent", data);
+}
+function naddrEncode(addr) {
+  let kind = new ArrayBuffer(4);
+  new DataView(kind).setUint32(0, addr.kind, false);
+  let data = encodeTLV({
+    0: [utf8Encoder.encode(addr.identifier)],
+    1: (addr.relays || []).map((url) => utf8Encoder.encode(url)),
+    2: [hexToBytes(addr.pubkey)],
+    3: [new Uint8Array(kind)]
+  });
+  return encodeBech32("naddr", data);
+}
+function nrelayEncode(url) {
+  let data = encodeTLV({
+    0: [utf8Encoder.encode(url)]
+  });
+  return encodeBech32("nrelay", data);
+}
+function encodeTLV(tlv) {
+  let entries = [];
+  Object.entries(tlv).forEach(([t, vs]) => {
+    vs.forEach((v) => {
+      let entry = new Uint8Array(v.length + 2);
+      entry.set([parseInt(t)], 0);
+      entry.set([v.length], 1);
+      entry.set(v, 2);
+      entries.push(entry);
+    });
+  });
+  return concatBytes(...entries);
+}
+export {
+  BECH32_REGEX,
+  decode,
+  naddrEncode,
+  neventEncode,
+  noteEncode,
+  nprofileEncode,
+  npubEncode,
+  nrelayEncode,
+  nsecEncode
+};