(Some(_rpc_user), None) => Err(anyhow!("no bitcoind rpc password specified")),
      _ => Ok(Auth::CookieFile(self.cookie_file()?)),
    }
  }

  pub(crate) fn bitcoin_rpc_client(&self) -> Result<Client> {
    let rpc_url = self.rpc_url();

    let auth = self.auth()?;

    log::info!("Connecting to Bitcoin Core at {}", self.rpc_url());

    if let Auth::CookieFile(cookie_file) = &auth {
      log::info!(
        "Using credentials from cookie file at `{}`",
        cookie_file.display()
      );
    }

    let client = Client::new(&rpc_url, auth)
      .with_context(|| format!("failed to connect to Bitcoin Core RPC at {rpc_url}"))?;

    let rpc_chain = match client.get_blockchain_info()?.chain.as_str() {
      "main" => Chain::Mainnet,
      "test" => Chain::Testnet,
      "regtest" => Chain::Regtest,
      "signet" => Chain::Signet,
      other => bail!("Bitcoin RPC server on unknown chain: {other}"),
    };

    let ord_chain = self.chain();

    if rpc_chain != ord_chain {
      bail!("Bitcoin RPC server is on {rpc_chain} but ord is on {ord_chain}");