newsroom/node_modules/nostr-tools/lib/esm/nip21.js

// nip19.ts
import { bytesToHex as bytesToHex2, concatBytes, hexToBytes as hexToBytes2 } from "@noble/hashes/utils";
import { bech32 } from "@scure/base";

// utils.ts
import { bytesToHex, hexToBytes } from "@noble/hashes/utils";
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 decode(code) {
  let { prefix, words } = bech32.decode(code, 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: bytesToHex2(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: bytesToHex2(tlv[0][0]),
          relays: tlv[1] ? tlv[1].map((d) => utf8Decoder.decode(d)) : [],
          author: tlv[2]?.[0] ? bytesToHex2(tlv[2][0]) : void 0,
          kind: tlv[3]?.[0] ? parseInt(bytesToHex2(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: bytesToHex2(tlv[2][0]),
          kind: parseInt(bytesToHex2(tlv[3][0]), 16),
          relays: tlv[1] ? tlv[1].map((d) => utf8Decoder.decode(d)) : []
        }
      };
    }
    case "nsec":
      return { type: prefix, data };
    case "npub":
    case "note":
      return { type: prefix, data: bytesToHex2(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];
    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;
}

// nip21.ts
var NOSTR_URI_REGEX = new RegExp(`nostr:(${BECH32_REGEX.source})`);
function test(value) {
  return typeof value === "string" && new RegExp(`^${NOSTR_URI_REGEX.source}$`).test(value);
}
function parse(uri) {
  const match = uri.match(new RegExp(`^${NOSTR_URI_REGEX.source}$`));
  if (!match)
    throw new Error(`Invalid Nostr URI: ${uri}`);
  return {
    uri: match[0],
    value: match[1],
    decoded: decode(match[1])
  };
}
export {
  NOSTR_URI_REGEX,
  parse,
  test
};