self.destinations.len(),
        self.inscriptions.len(),
        "invariant: destination addresses and number of inscriptions doesn't match"
      ),
      Mode::SharedOutput => assert_eq!(
        self.destinations.len(),
        1,
        "invariant: destination addresses and number of inscriptions doesn't match"
      ),
    }

    let satpoint = if let Some(satpoint) = self.satpoint {
      satpoint
    } else {
      let inscribed_utxos = wallet_inscriptions
        .keys()
        .map(|satpoint| satpoint.outpoint)
        .collect::<BTreeSet<OutPoint>>();

      utxos
        .keys()
        .find(|outpoint| !inscribed_utxos.contains(outpoint) && !locked_utxos.contains(outpoint))
        .map(|outpoint| SatPoint {
          outpoint: *outpoint,
          offset: 0,
        })
        .ok_or_else(|| anyhow!("wallet contains no cardinal utxos"))?
    };

    let mut reinscription = false;

    for (inscribed_satpoint, inscription_id) in &wallet_inscriptions {
      if *inscribed_satpoint == satpoint {