Function fetchUserInfo

pmcaptcha/pmcaptcha.ts:361–387

(client: TelegramClient, userId: number)

  if (username) usernameCache.set(id, username);
}

async function fetchUserInfo(client: TelegramClient, userId: number): Promise<any | null> {
  try {
    const e = await client.getEntity(userId) as any;
    cacheUserFromSender(e);
    return e;
  } catch {}

  try {
    const input = await client.getInputEntity(bigInt(userId));
    if (input instanceof Api.InputPeerUser) {
      const res = await client.invoke(new Api.users.GetUsers({
        id: [new Api.InputUser({ userId: input.userId, accessHash: input.accessHash })]
      })) as any[];
      const user = res?.[0];
      if (user && !(user instanceof Api.UserEmpty)) {
        cacheUserFromSender(user);
        return user;
      }
    }
  } catch {}

  return null;
}

async function getDisplayName(client: TelegramClient, userId: number): Promise<string> {
  if (nameCache.has(userId)) return nameCache.get(userId)!;
  const user = await fetchUserInfo(client, userId);
  if (user) {
    const name = [user.firstName, user.lastName].filter(Boolean).join(" ").trim() || "Unknown";