fix: remove deprecated `max_satisfaction_weight

- Change deprecated `max_satisfaction_weight` to `max_weight_to_satisfy`
- Remove `#[allow(deprecated)]` flags
- updates the calculations in TXIN_BASE_WEIGHT and P2WPKH_SATISFACTION_SIZE

Update crates/bdk/src/wallet/coin_selection.rs

Co-authored-by: ValuedMammal <valuedmammal@protonmail.com>

crates/bdk/src/wallet/coin_selection.rs

@@ -32,7 +32,6 @@
 //! # use bdk::*;
 //! # use bdk::wallet::coin_selection::decide_change;
 //! # use anyhow::Error;
-//! # const TXIN_BASE_WEIGHT: usize = (32 + 4 + 4) * 4;
 //! #[derive(Debug)]
 //! struct AlwaysSpendEverything;
 //!
@@ -55,7 +54,8 @@
 //!                 |(selected_amount, additional_weight), weighted_utxo| {
 //!                     **selected_amount += weighted_utxo.utxo.txout().value;
 //!                     **additional_weight += Weight::from_wu(
-//!                         (TXIN_BASE_WEIGHT + weighted_utxo.satisfaction_weight) as u64,
+//!                         (TxIn::default().segwit_weight() + weighted_utxo.satisfaction_weight)
+//!                             as u64,
 //!                     );
 //!                     Some(weighted_utxo.utxo)
 //!                 },
@@ -109,6 +109,7 @@ use bitcoin::FeeRate;
 use alloc::vec::Vec;
 use bitcoin::consensus::encode::serialize;
 use bitcoin::OutPoint;
+use bitcoin::TxIn;
 use bitcoin::{Script, Weight};
 
 use core::convert::TryInto;
@@ -119,10 +120,6 @@ use rand::seq::SliceRandom;
 /// overridden
 pub type DefaultCoinSelectionAlgorithm = BranchAndBoundCoinSelection;
 
-// Base weight of a Txin, not counting the weight needed for satisfying it.
-// prev_txid (32 bytes) + prev_vout (4 bytes) + sequence (4 bytes)
-pub(crate) const TXIN_BASE_WEIGHT: usize = (32 + 4 + 4) * 4;
-
 /// Errors that can be thrown by the [`coin_selection`](crate::wallet::coin_selection) module
 #[derive(Debug)]
 pub enum Error {
@@ -347,10 +344,10 @@ fn select_sorted_utxos(
                 if must_use || **selected_amount < target_amount + **fee_amount {
                     **fee_amount += (fee_rate
                         * Weight::from_wu(
-                            (TXIN_BASE_WEIGHT + weighted_utxo.satisfaction_weight) as u64,
+                            (TxIn::default().segwit_weight() + weighted_utxo.satisfaction_weight)
+                                as u64,
                         ))
                     .to_sat();
-
                     **selected_amount += weighted_utxo.utxo.txout().value;
                     Some(weighted_utxo.utxo)
                 } else {
@@ -392,9 +389,10 @@ struct OutputGroup {
 impl OutputGroup {
     fn new(weighted_utxo: WeightedUtxo, fee_rate: FeeRate) -> Self {
         let fee = (fee_rate
-            * Weight::from_wu((TXIN_BASE_WEIGHT + weighted_utxo.satisfaction_weight) as u64))
+            * Weight::from_wu(
+                (TxIn::default().segwit_weight() + weighted_utxo.satisfaction_weight) as u64,
+            ))
         .to_sat();
-
         let effective_value = weighted_utxo.utxo.txout().value as i64 - fee as i64;
         OutputGroup {
             weighted_utxo,
@@ -744,7 +742,7 @@ mod test {
     use core::str::FromStr;
 
     use bdk_chain::ConfirmationTime;
-    use bitcoin::{Amount, OutPoint, ScriptBuf, TxOut};
+    use bitcoin::{Amount, OutPoint, ScriptBuf, TxIn, TxOut};
 
     use super::*;
     use crate::types::*;
@@ -754,9 +752,9 @@ mod test {
     use rand::seq::SliceRandom;
     use rand::{Rng, RngCore, SeedableRng};
 
-    // n. of items on witness (1WU) + signature len (1WU) + signature and sighash (72WU)
+    // signature len (1WU) + signature and sighash (72WU)
-    // + pubkey len (1WU) + pubkey (33WU) + script sig len (1 byte, 4WU)
+    // + pubkey len (1WU) + pubkey (33WU)
-    const P2WPKH_SATISFACTION_SIZE: usize = 1 + 1 + 72 + 1 + 33 + 4;
+    const P2WPKH_SATISFACTION_SIZE: usize = 1 + 72 + 1 + 33;
 
     const FEE_AMOUNT: u64 = 50;
 
@@ -1240,7 +1238,7 @@ mod test {
 
         assert_eq!(result.selected.len(), 1);
         assert_eq!(result.selected_amount(), 100_000);
-        let input_weight = (TXIN_BASE_WEIGHT + P2WPKH_SATISFACTION_SIZE) as u64;
+        let input_weight = (TxIn::default().segwit_weight() + P2WPKH_SATISFACTION_SIZE) as u64;
         // the final fee rate should be exactly the same as the fee rate given
         let result_feerate = Amount::from_sat(result.fee_amount) / Weight::from_wu(input_weight);
         assert_eq!(result_feerate, feerate);

crates/bdk/src/wallet/mod.rs

@@ -54,7 +54,6 @@ pub(crate) mod utils;
 pub mod error;
 pub use utils::IsDust;
 
-#[allow(deprecated)]
 use coin_selection::DefaultCoinSelectionAlgorithm;
 use signer::{SignOptions, SignerOrdering, SignersContainer, TransactionSigner};
 use tx_builder::{BumpFee, CreateTx, FeePolicy, TxBuilder, TxParams};
@@ -1712,10 +1711,9 @@ impl<D> Wallet<D> {
 
                 let weighted_utxo = match txout_index.index_of_spk(&txout.script_pubkey) {
                     Some((keychain, derivation_index)) => {
-                        #[allow(deprecated)]
                         let satisfaction_weight = self
                             .get_descriptor_for_keychain(keychain)
-                            .max_satisfaction_weight()
+                            .max_weight_to_satisfy()
                             .unwrap();
                         WeightedUtxo {
                             utxo: Utxo::Local(LocalOutput {
@@ -1733,7 +1731,6 @@ impl<D> Wallet<D> {
                         let satisfaction_weight =
                             serialize(&txin.script_sig).len() * 4 + serialize(&txin.witness).len();
                         WeightedUtxo {
-                            satisfaction_weight,
                             utxo: Utxo::Foreign {
                                 outpoint: txin.previous_output,
                                 sequence: Some(txin.sequence),
@@ -1743,6 +1740,7 @@ impl<D> Wallet<D> {
                                     ..Default::default()
                                 }),
                             },
+                            satisfaction_weight,
                         }
                     }
                 };
@@ -2057,13 +2055,11 @@ impl<D> Wallet<D> {
         self.list_unspent()
             .map(|utxo| {
                 let keychain = utxo.keychain;
-                #[allow(deprecated)]
+                (utxo, {
-                (
-                    utxo,
                     self.get_descriptor_for_keychain(keychain)
-                        .max_satisfaction_weight()
+                        .max_weight_to_satisfy()
-                        .unwrap(),
+                        .unwrap()
-                )
+                })
             })
             .collect()
     }

crates/bdk/src/wallet/tx_builder.rs

@@ -314,8 +314,7 @@ impl<'a, D, Cs, Ctx> TxBuilder<'a, D, Cs, Ctx> {
 
             for utxo in utxos {
                 let descriptor = wallet.get_descriptor_for_keychain(utxo.keychain);
-                #[allow(deprecated)]
+                let satisfaction_weight = descriptor.max_weight_to_satisfy().unwrap();
-                let satisfaction_weight = descriptor.max_satisfaction_weight().unwrap();
                 self.params.utxos.push(WeightedUtxo {
                     satisfaction_weight,
                     utxo: Utxo::Local(utxo),
@@ -356,9 +355,9 @@ impl<'a, D, Cs, Ctx> TxBuilder<'a, D, Cs, Ctx> {
     /// causing you to pay a fee that is too high. The party who is broadcasting the transaction can
     /// of course check the real input weight matches the expected weight prior to broadcasting.
     ///
-    /// To guarantee the `satisfaction_weight` is correct, you can require the party providing the
+    /// To guarantee the `max_weight_to_satisfy` is correct, you can require the party providing the
     /// `psbt_input` provide a miniscript descriptor for the input so you can check it against the
-    /// `script_pubkey` and then ask it for the [`max_satisfaction_weight`].
+    /// `script_pubkey` and then ask it for the [`max_weight_to_satisfy`].
     ///
     /// This is an **EXPERIMENTAL** feature, API and other major changes are expected.
     ///
@@ -379,7 +378,7 @@ impl<'a, D, Cs, Ctx> TxBuilder<'a, D, Cs, Ctx> {
     ///
     /// [`only_witness_utxo`]: Self::only_witness_utxo
     /// [`finish`]: Self::finish
-    /// [`max_satisfaction_weight`]: miniscript::Descriptor::max_satisfaction_weight
+    /// [`max_weight_to_satisfy`]: miniscript::Descriptor::max_weight_to_satisfy
     pub fn add_foreign_utxo(
         &mut self,
         outpoint: OutPoint,

crates/bdk/tests/wallet.rs

@@ -1171,10 +1171,9 @@ fn test_add_foreign_utxo() {
         .unwrap()
         .assume_checked();
     let utxo = wallet2.list_unspent().next().expect("must take!");
-    #[allow(deprecated)]
     let foreign_utxo_satisfaction = wallet2
         .get_descriptor_for_keychain(KeychainKind::External)
-        .max_satisfaction_weight()
+        .max_weight_to_satisfy()
         .unwrap();
 
     let psbt_input = psbt::Input {
@@ -1247,10 +1246,9 @@ fn test_calculate_fee_with_missing_foreign_utxo() {
         .unwrap()
         .assume_checked();
     let utxo = wallet2.list_unspent().next().expect("must take!");
-    #[allow(deprecated)]
     let foreign_utxo_satisfaction = wallet2
         .get_descriptor_for_keychain(KeychainKind::External)
-        .max_satisfaction_weight()
+        .max_weight_to_satisfy()
         .unwrap();
 
     let psbt_input = psbt::Input {
@@ -1273,10 +1271,9 @@ fn test_calculate_fee_with_missing_foreign_utxo() {
 fn test_add_foreign_utxo_invalid_psbt_input() {
     let (mut wallet, _) = get_funded_wallet(get_test_wpkh());
     let outpoint = wallet.list_unspent().next().expect("must exist").outpoint;
-    #[allow(deprecated)]
     let foreign_utxo_satisfaction = wallet
         .get_descriptor_for_keychain(KeychainKind::External)
-        .max_satisfaction_weight()
+        .max_weight_to_satisfy()
         .unwrap();
 
     let mut builder = wallet.build_tx();
@@ -1295,10 +1292,9 @@ fn test_add_foreign_utxo_where_outpoint_doesnt_match_psbt_input() {
     let tx1 = wallet1.get_tx(txid1).unwrap().tx_node.tx.clone();
     let tx2 = wallet2.get_tx(txid2).unwrap().tx_node.tx.clone();
 
-    #[allow(deprecated)]
     let satisfaction_weight = wallet2
         .get_descriptor_for_keychain(KeychainKind::External)
-        .max_satisfaction_weight()
+        .max_weight_to_satisfy()
         .unwrap();
 
     let mut builder = wallet1.build_tx();
@@ -1340,10 +1336,9 @@ fn test_add_foreign_utxo_only_witness_utxo() {
         .assume_checked();
     let utxo2 = wallet2.list_unspent().next().unwrap();
 
-    #[allow(deprecated)]
     let satisfaction_weight = wallet2
         .get_descriptor_for_keychain(KeychainKind::External)
-        .max_satisfaction_weight()
+        .max_weight_to_satisfy()
         .unwrap();
 
     let mut builder = wallet1.build_tx();
@@ -3074,10 +3069,9 @@ fn test_taproot_foreign_utxo() {
         .assume_checked();
     let utxo = wallet2.list_unspent().next().unwrap();
     let psbt_input = wallet2.get_psbt_input(utxo.clone(), None, false).unwrap();
-    #[allow(deprecated)]
     let foreign_utxo_satisfaction = wallet2
         .get_descriptor_for_keychain(KeychainKind::External)
-        .max_satisfaction_weight()
+        .max_weight_to_satisfy()
         .unwrap();
 
     assert!(