tx_out(989_870, change(1))
        ],
      })
    )
  }

  #[test]
  #[should_panic(expected = "invariant: excess postage is stripped")]
  fn invariant_excess_postage_is_stripped() {
    let utxos = vec![(outpoint(1), Amount::from_sat(1_000_000))];

    TransactionBuilder::new(
      satpoint(1, 0),
      BTreeMap::new(),
      utxos.into_iter().collect(),
      BTreeSet::new(),
      recipient(),
      [change(0), change(1)],
      FeeRate::try_from(1.0).unwrap(),
      Target::Postage,
    )
    .select_outgoing()
    .unwrap()
    .build()
    .unwrap();
  }

  #[test]
  fn sat_is_aligned() {
    let utxos = vec![(outpoint(1), Amount::from_sat(10_000))];

    pretty_assert_eq!(
      TransactionBuilder::new(
        satpoint(1, 3_333),
        BTreeMap::new(),
        utxos.into_iter().collect(),
        BTreeSet::new(),
        recipient(),
        [change(0), change(1)],
        FeeRate::try_from(1.0).unwrap(),
        Target::Postage,
      )
      .build_transaction(),
      Ok(Transaction {