newsroom/node_modules/nostr-tools/lib/cjs/nip18.js

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// nip18.ts
var nip18_exports = {};
__export(nip18_exports, {
  finishRepostEvent: () => finishRepostEvent,
  getRepostedEvent: () => getRepostedEvent,
  getRepostedEventPointer: () => getRepostedEventPointer
});
module.exports = __toCommonJS(nip18_exports);

// pure.ts
var import_secp256k1 = require("@noble/curves/secp256k1");
var import_utils2 = require("@noble/hashes/utils");

// core.ts
var verifiedSymbol = Symbol("verified");
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 i2 = 0; i2 < event.tags.length; i2++) {
    let tag = event.tags[i2];
    if (!Array.isArray(tag))
      return false;
    for (let j = 0; j < tag.length; j++) {
      if (typeof tag[j] !== "string")
        return false;
    }
  }
  return true;
}

// pure.ts
var import_sha256 = require("@noble/hashes/sha256");

// utils.ts
var import_utils = require("@noble/hashes/utils");
var utf8Decoder = new TextDecoder("utf-8");
var utf8Encoder = new TextEncoder();

// pure.ts
var JS = class {
  generateSecretKey() {
    return import_secp256k1.schnorr.utils.randomPrivateKey();
  }
  getPublicKey(secretKey) {
    return (0, import_utils2.bytesToHex)(import_secp256k1.schnorr.getPublicKey(secretKey));
  }
  finalizeEvent(t, secretKey) {
    const event = t;
    event.pubkey = (0, import_utils2.bytesToHex)(import_secp256k1.schnorr.getPublicKey(secretKey));
    event.id = getEventHash(event);
    event.sig = (0, import_utils2.bytesToHex)(import_secp256k1.schnorr.sign(getEventHash(event), secretKey));
    event[verifiedSymbol] = true;
    return event;
  }
  verifyEvent(event) {
    if (typeof event[verifiedSymbol] === "boolean")
      return event[verifiedSymbol];
    const hash = getEventHash(event);
    if (hash !== event.id) {
      event[verifiedSymbol] = false;
      return false;
    }
    try {
      const valid = import_secp256k1.schnorr.verify(event.sig, hash, event.pubkey);
      event[verifiedSymbol] = valid;
      return valid;
    } catch (err) {
      event[verifiedSymbol] = false;
      return false;
    }
  }
};
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 = (0, import_sha256.sha256)(utf8Encoder.encode(serializeEvent(event)));
  return (0, import_utils2.bytesToHex)(eventHash);
}
var i = new JS();
var generateSecretKey = i.generateSecretKey;
var getPublicKey = i.getPublicKey;
var finalizeEvent = i.finalizeEvent;
var verifyEvent = i.verifyEvent;

// kinds.ts
var ShortTextNote = 1;
var Repost = 6;
var GenericRepost = 16;

// nip18.ts
function finishRepostEvent(t, reposted, relayUrl, privateKey) {
  let kind;
  const tags = [...t.tags ?? [], ["e", reposted.id, relayUrl], ["p", reposted.pubkey]];
  if (reposted.kind === ShortTextNote) {
    kind = Repost;
  } else {
    kind = GenericRepost;
    tags.push(["k", String(reposted.kind)]);
  }
  return finalizeEvent(
    {
      kind,
      tags,
      content: t.content === "" || reposted.tags?.find((tag) => tag[0] === "-") ? "" : JSON.stringify(reposted),
      created_at: t.created_at
    },
    privateKey
  );
}
function getRepostedEventPointer(event) {
  if (![Repost, GenericRepost].includes(event.kind)) {
    return void 0;
  }
  let lastETag;
  let lastPTag;
  for (let i2 = event.tags.length - 1; i2 >= 0 && (lastETag === void 0 || lastPTag === void 0); i2--) {
    const tag = event.tags[i2];
    if (tag.length >= 2) {
      if (tag[0] === "e" && lastETag === void 0) {
        lastETag = tag;
      } else if (tag[0] === "p" && lastPTag === void 0) {
        lastPTag = tag;
      }
    }
  }
  if (lastETag === void 0) {
    return void 0;
  }
  return {
    id: lastETag[1],
    relays: [lastETag[2], lastPTag?.[2]].filter((x) => typeof x === "string"),
    author: lastPTag?.[1]
  };
}
function getRepostedEvent(event, { skipVerification } = {}) {
  const pointer = getRepostedEventPointer(event);
  if (pointer === void 0 || event.content === "") {
    return void 0;
  }
  let repostedEvent;
  try {
    repostedEvent = JSON.parse(event.content);
  } catch (error) {
    return void 0;
  }
  if (repostedEvent.id !== pointer.id) {
    return void 0;
  }
  if (!skipVerification && !verifyEvent(repostedEvent)) {
    return void 0;
  }
  return repostedEvent;
}