newsroom/node_modules/nostr-tools/lib/esm/nip47.js

// pure.ts
import { schnorr } from "@noble/curves/secp256k1";
import { bytesToHex as bytesToHex2 } from "@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
import { sha256 } from "@noble/hashes/sha256";

// utils.ts
import { bytesToHex, hexToBytes } from "@noble/hashes/utils";
var utf8Decoder = new TextDecoder("utf-8");
var utf8Encoder = new TextEncoder();

// pure.ts
var JS = class {
  generateSecretKey() {
    return schnorr.utils.randomPrivateKey();
  }
  getPublicKey(secretKey) {
    return bytesToHex2(schnorr.getPublicKey(secretKey));
  }
  finalizeEvent(t, secretKey) {
    const event = t;
    event.pubkey = bytesToHex2(schnorr.getPublicKey(secretKey));
    event.id = getEventHash(event);
    event.sig = bytesToHex2(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 = 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 = sha256(utf8Encoder.encode(serializeEvent(event)));
  return bytesToHex2(eventHash);
}
var i = new JS();
var generateSecretKey = i.generateSecretKey;
var getPublicKey = i.getPublicKey;
var finalizeEvent = i.finalizeEvent;
var verifyEvent = i.verifyEvent;

// kinds.ts
var NWCWalletRequest = 23194;

// nip04.ts
import { bytesToHex as bytesToHex3, randomBytes } from "@noble/hashes/utils";
import { secp256k1 } from "@noble/curves/secp256k1";
import { cbc } from "@noble/ciphers/aes";
import { base64 } from "@scure/base";
function encrypt(secretKey, pubkey, text) {
  const privkey = secretKey instanceof Uint8Array ? bytesToHex3(secretKey) : secretKey;
  const key = secp256k1.getSharedSecret(privkey, "02" + pubkey);
  const normalizedKey = getNormalizedX(key);
  let iv = Uint8Array.from(randomBytes(16));
  let plaintext = utf8Encoder.encode(text);
  let ciphertext = cbc(normalizedKey, iv).encrypt(plaintext);
  let ctb64 = base64.encode(new Uint8Array(ciphertext));
  let ivb64 = base64.encode(new Uint8Array(iv.buffer));
  return `${ctb64}?iv=${ivb64}`;
}
function getNormalizedX(key) {
  return key.slice(1, 33);
}

// nip47.ts
function parseConnectionString(connectionString) {
  const { host, pathname, searchParams } = new URL(connectionString);
  const pubkey = pathname || host;
  const relay = searchParams.get("relay");
  const secret = searchParams.get("secret");
  if (!pubkey || !relay || !secret) {
    throw new Error("invalid connection string");
  }
  return { pubkey, relay, secret };
}
async function makeNwcRequestEvent(pubkey, secretKey, invoice) {
  const content = {
    method: "pay_invoice",
    params: {
      invoice
    }
  };
  const encryptedContent = encrypt(secretKey, pubkey, JSON.stringify(content));
  const eventTemplate = {
    kind: NWCWalletRequest,
    created_at: Math.round(Date.now() / 1e3),
    content: encryptedContent,
    tags: [["p", pubkey]]
  };
  return finalizeEvent(eventTemplate, secretKey);
}
export {
  makeNwcRequestEvent,
  parseConnectionString
};