feat: use Amount on spk_txout_index and related

- update `wallet.rs` fns: `sent_and_received` fn
- update `keychain` `txout_index` fn: `sent_and_received and `net_value`

crates/bdk/src/wallet/mod.rs

@@ -953,7 +953,7 @@ impl Wallet {
             .map(|fee| Amount::from_sat(fee) / tx.weight())
     }
 
-    /// Compute the `tx`'s sent and received amounts (in satoshis).
+    /// Compute the `tx`'s sent and received [`Amount`]s.
     ///
     /// This method returns a tuple `(sent, received)`. Sent is the sum of the txin amounts
     /// that spend from previous txouts tracked by this wallet. Received is the summation
@@ -978,7 +978,7 @@ impl Wallet {
     /// let tx = &psbt.clone().extract_tx().expect("tx");
     /// let (sent, received) = wallet.sent_and_received(tx);
     /// ```
-    pub fn sent_and_received(&self, tx: &Transaction) -> (u64, u64) {
+    pub fn sent_and_received(&self, tx: &Transaction) -> (Amount, Amount) {
         self.indexed_graph.index.sent_and_received(tx, ..)
     }
 

crates/bdk/tests/wallet.rs

@@ -207,7 +207,7 @@ fn test_get_funded_wallet_balance() {
 fn test_get_funded_wallet_sent_and_received() {
     let (wallet, txid) = get_funded_wallet(get_test_wpkh());
 
-    let mut tx_amounts: Vec<(Txid, (u64, u64))> = wallet
+    let mut tx_amounts: Vec<(Txid, (Amount, Amount))> = wallet
         .transactions()
         .map(|ct| (ct.tx_node.txid, wallet.sent_and_received(&ct.tx_node)))
         .collect();
@@ -219,8 +219,8 @@ fn test_get_funded_wallet_sent_and_received() {
     // The funded wallet contains a tx with a 76_000 sats input and two outputs, one spending 25_000
     // to a foreign address and one returning 50_000 back to the wallet as change. The remaining 1000
     // sats are the transaction fee.
-    assert_eq!(sent, 76_000);
+    assert_eq!(sent.to_sat(), 76_000);
-    assert_eq!(received, 50_000);
+    assert_eq!(received.to_sat(), 50_000);
 }
 
 #[test]
@@ -1034,7 +1034,8 @@ fn test_create_tx_add_utxo() {
         "should add an additional input since 25_000 < 30_000"
     );
     assert_eq!(
-        sent_received.0, 75_000,
+        sent_received.0,
+        Amount::from_sat(75_000),
         "total should be sum of both inputs"
     );
 }
@@ -1225,7 +1226,7 @@ fn test_add_foreign_utxo() {
         wallet1.sent_and_received(&psbt.clone().extract_tx().expect("failed to extract tx"));
 
     assert_eq!(
-        sent_received.0 - sent_received.1,
+        (sent_received.0 - sent_received.1).to_sat(),
         10_000 + fee.unwrap_or(0),
         "we should have only net spent ~10_000"
     );
@@ -1622,8 +1623,8 @@ fn test_bump_fee_reduce_change() {
 
     assert_eq!(sent_received.0, original_sent_received.0);
     assert_eq!(
-        sent_received.1 + fee.unwrap_or(0),
+        sent_received.1 + Amount::from_sat(fee.unwrap_or(0)),
-        original_sent_received.1 + original_fee.unwrap_or(0)
+        original_sent_received.1 + Amount::from_sat(original_fee.unwrap_or(0))
     );
     assert!(fee.unwrap_or(0) > original_fee.unwrap_or(0));
 
@@ -1642,8 +1643,7 @@ fn test_bump_fee_reduce_change() {
             .iter()
             .find(|txout| txout.script_pubkey != addr.script_pubkey())
             .unwrap()
-            .value
+            .value,
-            .to_sat(),
         sent_received.1
     );
 
@@ -1659,8 +1659,8 @@ fn test_bump_fee_reduce_change() {
 
     assert_eq!(sent_received.0, original_sent_received.0);
     assert_eq!(
-        sent_received.1 + fee.unwrap_or(0),
+        sent_received.1 + Amount::from_sat(fee.unwrap_or(0)),
-        original_sent_received.1 + original_fee.unwrap_or(0)
+        original_sent_received.1 + Amount::from_sat(original_fee.unwrap_or(0))
     );
     assert!(
         fee.unwrap_or(0) > original_fee.unwrap_or(0),
@@ -1684,8 +1684,7 @@ fn test_bump_fee_reduce_change() {
             .iter()
             .find(|txout| txout.script_pubkey != addr.script_pubkey())
             .unwrap()
-            .value
+            .value,
-            .to_sat(),
         sent_received.1
     );
 
@@ -1729,7 +1728,7 @@ fn test_bump_fee_reduce_single_recipient() {
     let tx = &psbt.unsigned_tx;
     assert_eq!(tx.output.len(), 1);
     assert_eq!(
-        tx.output[0].value.to_sat() + fee.unwrap_or(0),
+        tx.output[0].value + Amount::from_sat(fee.unwrap_or(0)),
         sent_received.0
     );
 
@@ -1771,7 +1770,7 @@ fn test_bump_fee_absolute_reduce_single_recipient() {
 
     assert_eq!(tx.output.len(), 1);
     assert_eq!(
-        tx.output[0].value.to_sat() + fee.unwrap_or(0),
+        tx.output[0].value + Amount::from_sat(fee.unwrap_or(0)),
         sent_received.0
     );
 
@@ -1825,7 +1824,7 @@ fn test_bump_fee_drain_wallet() {
     wallet
         .insert_tx(tx, ConfirmationTime::Unconfirmed { last_seen: 0 })
         .unwrap();
-    assert_eq!(original_sent_received.0, 25_000);
+    assert_eq!(original_sent_received.0, Amount::from_sat(25_000));
 
     // for the new feerate, it should be enough to reduce the output, but since we specify
     // `drain_wallet` we expect to spend everything
@@ -1838,7 +1837,7 @@ fn test_bump_fee_drain_wallet() {
     let psbt = builder.finish().unwrap();
     let sent_received = wallet.sent_and_received(&psbt.extract_tx().expect("failed to extract tx"));
 
-    assert_eq!(sent_received.0, 75_000);
+    assert_eq!(sent_received.0, Amount::from_sat(75_000));
 }
 
 #[test]
@@ -1895,7 +1894,7 @@ fn test_bump_fee_remove_output_manually_selected_only() {
     wallet
         .insert_tx(tx, ConfirmationTime::Unconfirmed { last_seen: 0 })
         .unwrap();
-    assert_eq!(original_sent_received.0, 25_000);
+    assert_eq!(original_sent_received.0, Amount::from_sat(25_000));
 
     let mut builder = wallet.build_fee_bump(txid).unwrap();
     builder
@@ -1949,8 +1948,14 @@ fn test_bump_fee_add_input() {
     let sent_received =
         wallet.sent_and_received(&psbt.clone().extract_tx().expect("failed to extract tx"));
     let fee = check_fee!(wallet, psbt);
-    assert_eq!(sent_received.0, original_details.0 + 25_000);
+    assert_eq!(
-    assert_eq!(fee.unwrap_or(0) + sent_received.1, 30_000);
+        sent_received.0,
+        original_details.0 + Amount::from_sat(25_000)
+    );
+    assert_eq!(
+        Amount::from_sat(fee.unwrap_or(0)) + sent_received.1,
+        Amount::from_sat(30_000)
+    );
 
     let tx = &psbt.unsigned_tx;
     assert_eq!(tx.input.len(), 2);
@@ -1968,8 +1973,7 @@ fn test_bump_fee_add_input() {
             .iter()
             .find(|txout| txout.script_pubkey != addr.script_pubkey())
             .unwrap()
-            .value
+            .value,
-            .to_sat(),
         sent_received.1
     );
 
@@ -2002,8 +2006,14 @@ fn test_bump_fee_absolute_add_input() {
         wallet.sent_and_received(&psbt.clone().extract_tx().expect("failed to extract tx"));
     let fee = check_fee!(wallet, psbt);
 
-    assert_eq!(sent_received.0, original_sent_received.0 + 25_000);
+    assert_eq!(
-    assert_eq!(fee.unwrap_or(0) + sent_received.1, 30_000);
+        sent_received.0,
+        original_sent_received.0 + Amount::from_sat(25_000)
+    );
+    assert_eq!(
+        Amount::from_sat(fee.unwrap_or(0)) + sent_received.1,
+        Amount::from_sat(30_000)
+    );
 
     let tx = &psbt.unsigned_tx;
     assert_eq!(tx.input.len(), 2);
@@ -2021,8 +2031,7 @@ fn test_bump_fee_absolute_add_input() {
             .iter()
             .find(|txout| txout.script_pubkey != addr.script_pubkey())
             .unwrap()
-            .value
+            .value,
-            .to_sat(),
         sent_received.1
     );
 
@@ -2065,11 +2074,15 @@ fn test_bump_fee_no_change_add_input_and_change() {
         wallet.sent_and_received(&psbt.clone().extract_tx().expect("failed to extract tx"));
     let fee = check_fee!(wallet, psbt);
 
-    let original_send_all_amount = original_sent_received.0 - original_fee.unwrap_or(0);
+    let original_send_all_amount =
-    assert_eq!(sent_received.0, original_sent_received.0 + 50_000);
+        original_sent_received.0 - Amount::from_sat(original_fee.unwrap_or(0));
+    assert_eq!(
+        sent_received.0,
+        original_sent_received.0 + Amount::from_sat(50_000)
+    );
     assert_eq!(
         sent_received.1,
-        75_000 - original_send_all_amount - fee.unwrap_or(0)
+        Amount::from_sat(75_000) - original_send_all_amount - Amount::from_sat(fee.unwrap_or(0))
     );
 
     let tx = &psbt.unsigned_tx;
@@ -2081,16 +2094,15 @@ fn test_bump_fee_no_change_add_input_and_change() {
             .find(|txout| txout.script_pubkey == addr.script_pubkey())
             .unwrap()
             .value,
-        Amount::from_sat(original_send_all_amount)
+        original_send_all_amount
     );
     assert_eq!(
         tx.output
             .iter()
             .find(|txout| txout.script_pubkey != addr.script_pubkey())
             .unwrap()
-            .value
+            .value,
-            .to_sat(),
+        Amount::from_sat(75_000) - original_send_all_amount - Amount::from_sat(fee.unwrap_or(0))
-        75_000 - original_send_all_amount - fee.unwrap_or(0)
     );
 
     assert_fee_rate!(psbt, fee.unwrap_or(0), FeeRate::from_sat_per_vb_unchecked(50), @add_signature);
@@ -2145,11 +2157,17 @@ fn test_bump_fee_add_input_change_dust() {
         wallet.sent_and_received(&psbt.clone().extract_tx().expect("failed to extract tx"));
     let fee = check_fee!(wallet, psbt);
 
-    assert_eq!(original_sent_received.1, 5_000 - original_fee.unwrap_or(0));
+    assert_eq!(
+        original_sent_received.1,
+        Amount::from_sat(5_000 - original_fee.unwrap_or(0))
+    );
 
-    assert_eq!(sent_received.0, original_sent_received.0 + 25_000);
+    assert_eq!(
+        sent_received.0,
+        original_sent_received.0 + Amount::from_sat(25_000)
+    );
     assert_eq!(fee.unwrap_or(0), 30_000);
-    assert_eq!(sent_received.1, 0);
+    assert_eq!(sent_received.1, Amount::ZERO);
 
     let tx = &psbt.unsigned_tx;
     assert_eq!(tx.input.len(), 2);
@@ -2200,8 +2218,14 @@ fn test_bump_fee_force_add_input() {
         wallet.sent_and_received(&psbt.clone().extract_tx().expect("failed to extract tx"));
     let fee = check_fee!(wallet, psbt);
 
-    assert_eq!(sent_received.0, original_sent_received.0 + 25_000);
+    assert_eq!(
-    assert_eq!(fee.unwrap_or(0) + sent_received.1, 30_000);
+        sent_received.0,
+        original_sent_received.0 + Amount::from_sat(25_000)
+    );
+    assert_eq!(
+        Amount::from_sat(fee.unwrap_or(0)) + sent_received.1,
+        Amount::from_sat(30_000)
+    );
 
     let tx = &psbt.unsigned_tx;
     assert_eq!(tx.input.len(), 2);
@@ -2219,8 +2243,7 @@ fn test_bump_fee_force_add_input() {
             .iter()
             .find(|txout| txout.script_pubkey != addr.script_pubkey())
             .unwrap()
-            .value
+            .value,
-            .to_sat(),
         sent_received.1
     );
 
@@ -2260,8 +2283,14 @@ fn test_bump_fee_absolute_force_add_input() {
         wallet.sent_and_received(&psbt.clone().extract_tx().expect("failed to extract tx"));
     let fee = check_fee!(wallet, psbt);
 
-    assert_eq!(sent_received.0, original_sent_received.0 + 25_000);
+    assert_eq!(
-    assert_eq!(fee.unwrap_or(0) + sent_received.1, 30_000);
+        sent_received.0,
+        original_sent_received.0 + Amount::from_sat(25_000)
+    );
+    assert_eq!(
+        Amount::from_sat(fee.unwrap_or(0)) + sent_received.1,
+        Amount::from_sat(30_000)
+    );
 
     let tx = &psbt.unsigned_tx;
     assert_eq!(tx.input.len(), 2);
@@ -2279,8 +2308,7 @@ fn test_bump_fee_absolute_force_add_input() {
             .iter()
             .find(|txout| txout.script_pubkey != addr.script_pubkey())
             .unwrap()
-            .value
+            .value,
-            .to_sat(),
         sent_received.1
     );
 
@@ -3228,7 +3256,7 @@ fn test_taproot_foreign_utxo() {
 
     assert_eq!(
         sent_received.0 - sent_received.1,
-        10_000 + fee.unwrap_or(0),
+        Amount::from_sat(10_000 + fee.unwrap_or(0)),
         "we should have only net spent ~10_000"
     );
 

crates/chain/src/keychain/txout_index.rs

@@ -5,7 +5,7 @@ use crate::{
     spk_iter::BIP32_MAX_INDEX,
     SpkIterator, SpkTxOutIndex,
 };
-use bitcoin::{OutPoint, Script, Transaction, TxOut, Txid};
+use bitcoin::{Amount, OutPoint, Script, SignedAmount, Transaction, TxOut, Txid};
 use core::{
     fmt::Debug,
     ops::{Bound, RangeBounds},
@@ -273,7 +273,11 @@ impl<K: Clone + Ord + Debug> KeychainTxOutIndex<K> {
     /// *received* when it is on an output. For `sent` to be computed correctly, the output being
     /// spent must have already been scanned by the index. Calculating received just uses the
     /// [`Transaction`] outputs directly, so it will be correct even if it has not been scanned.
-    pub fn sent_and_received(&self, tx: &Transaction, range: impl RangeBounds<K>) -> (u64, u64) {
+    pub fn sent_and_received(
+        &self,
+        tx: &Transaction,
+        range: impl RangeBounds<K>,
+    ) -> (Amount, Amount) {
         self.inner
             .sent_and_received(tx, Self::map_to_inner_bounds(range))
     }
@@ -285,7 +289,7 @@ impl<K: Clone + Ord + Debug> KeychainTxOutIndex<K> {
     /// This calls [`SpkTxOutIndex::net_value`] internally.
     ///
     /// [`sent_and_received`]: Self::sent_and_received
-    pub fn net_value(&self, tx: &Transaction, range: impl RangeBounds<K>) -> i64 {
+    pub fn net_value(&self, tx: &Transaction, range: impl RangeBounds<K>) -> SignedAmount {
         self.inner.net_value(tx, Self::map_to_inner_bounds(range))
     }
 }

crates/chain/src/spk_txout_index.rs

@@ -4,7 +4,7 @@ use crate::{
     collections::{hash_map::Entry, BTreeMap, BTreeSet, HashMap},
     indexed_tx_graph::Indexer,
 };
-use bitcoin::{OutPoint, Script, ScriptBuf, Transaction, TxOut, Txid};
+use bitcoin::{Amount, OutPoint, Script, ScriptBuf, SignedAmount, Transaction, TxOut, Txid};
 
 /// An index storing [`TxOut`]s that have a script pubkey that matches those in a list.
 ///
@@ -270,27 +270,30 @@ impl<I: Clone + Ord> SpkTxOutIndex<I> {
         self.spk_indices.get(script)
     }
 
-    // TODO: (@leonardo) Should this also be updated to return `(bitcoin::Amount, bitcoin::Amount)` instead of (u64, u64)
     /// Computes the total value transfer effect `tx` has on the script pubkeys in `range`. Value is
     /// *sent* when a script pubkey in the `range` is on an input and *received* when it is on an
     /// output. For `sent` to be computed correctly, the output being spent must have already been
     /// scanned by the index. Calculating received just uses the [`Transaction`] outputs directly,
     /// so it will be correct even if it has not been scanned.
-    pub fn sent_and_received(&self, tx: &Transaction, range: impl RangeBounds<I>) -> (u64, u64) {
+    pub fn sent_and_received(
-        let mut sent = 0;
+        &self,
-        let mut received = 0;
+        tx: &Transaction,
+        range: impl RangeBounds<I>,
+    ) -> (Amount, Amount) {
+        let mut sent = Amount::ZERO;
+        let mut received = Amount::ZERO;
 
         for txin in &tx.input {
             if let Some((index, txout)) = self.txout(txin.previous_output) {
                 if range.contains(index) {
-                    sent += txout.value.to_sat();
+                    sent += txout.value;
                 }
             }
         }
         for txout in &tx.output {
             if let Some(index) = self.index_of_spk(&txout.script_pubkey) {
                 if range.contains(index) {
-                    received += txout.value.to_sat();
+                    received += txout.value;
                 }
             }
         }
@@ -302,9 +305,10 @@ impl<I: Clone + Ord> SpkTxOutIndex<I> {
     /// for calling [`sent_and_received`] and subtracting sent from received.
     ///
     /// [`sent_and_received`]: Self::sent_and_received
-    pub fn net_value(&self, tx: &Transaction, range: impl RangeBounds<I>) -> i64 {
+    pub fn net_value(&self, tx: &Transaction, range: impl RangeBounds<I>) -> SignedAmount {
         let (sent, received) = self.sent_and_received(tx, range);
-        received as i64 - sent as i64
+        received.to_signed().expect("valid `SignedAmount`")
+            - sent.to_signed().expect("valid `SignedAmount`")
     }
 
     /// Whether any of the inputs of this transaction spend a txout tracked or whether any output

crates/chain/tests/test_spk_txout_index.rs

@@ -1,5 +1,7 @@
 use bdk_chain::{indexed_tx_graph::Indexer, SpkTxOutIndex};
-use bitcoin::{absolute, transaction, Amount, OutPoint, ScriptBuf, Transaction, TxIn, TxOut};
+use bitcoin::{
+    absolute, transaction, Amount, OutPoint, ScriptBuf, SignedAmount, Transaction, TxIn, TxOut,
+};
 
 #[test]
 fn spk_txout_sent_and_received() {
@@ -20,14 +22,23 @@ fn spk_txout_sent_and_received() {
         }],
     };
 
-    assert_eq!(index.sent_and_received(&tx1, ..), (0, 42_000));
+    assert_eq!(
-    assert_eq!(index.sent_and_received(&tx1, ..1), (0, 42_000));
+        index.sent_and_received(&tx1, ..),
-    assert_eq!(index.sent_and_received(&tx1, 1..), (0, 0));
+        (Amount::from_sat(0), Amount::from_sat(42_000))
-    assert_eq!(index.net_value(&tx1, ..), 42_000);
+    );
+    assert_eq!(
+        index.sent_and_received(&tx1, ..1),
+        (Amount::from_sat(0), Amount::from_sat(42_000))
+    );
+    assert_eq!(
+        index.sent_and_received(&tx1, 1..),
+        (Amount::from_sat(0), Amount::from_sat(0))
+    );
+    assert_eq!(index.net_value(&tx1, ..), SignedAmount::from_sat(42_000));
     index.index_tx(&tx1);
     assert_eq!(
         index.sent_and_received(&tx1, ..),
-        (0, 42_000),
+        (Amount::from_sat(0), Amount::from_sat(42_000)),
         "shouldn't change after scanning"
     );
 
@@ -53,10 +64,19 @@ fn spk_txout_sent_and_received() {
         ],
     };
 
-    assert_eq!(index.sent_and_received(&tx2, ..), (42_000, 50_000));
+    assert_eq!(
-    assert_eq!(index.sent_and_received(&tx2, ..1), (42_000, 30_000));
+        index.sent_and_received(&tx2, ..),
-    assert_eq!(index.sent_and_received(&tx2, 1..), (0, 20_000));
+        (Amount::from_sat(42_000), Amount::from_sat(50_000))
-    assert_eq!(index.net_value(&tx2, ..), 8_000);
+    );
+    assert_eq!(
+        index.sent_and_received(&tx2, ..1),
+        (Amount::from_sat(42_000), Amount::from_sat(30_000))
+    );
+    assert_eq!(
+        index.sent_and_received(&tx2, 1..),
+        (Amount::from_sat(0), Amount::from_sat(20_000))
+    );
+    assert_eq!(index.net_value(&tx2, ..), SignedAmount::from_sat(8_000));
 }
 
 #[test]