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fix(wallet): Don't fail in build_fee_bump for missing parent txid #337

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fix(wallet): Don't fail in build_fee_bump for missing parent txid #337

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6f214d5
test: Add `test_add_foreign_utxo_build_fee_bump`
ValuedMammal Nov 5, 2025
592217f
fix(wallet): Don't fail in `build_fee_bump` for missing parent txid
ValuedMammal Nov 5, 2025
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116 changes: 52 additions & 64 deletions src/wallet/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1711,15 +1711,15 @@ impl Wallet {
&mut self,
txid: Txid,
) -> Result<TxBuilder<'_, DefaultCoinSelectionAlgorithm>, BuildFeeBumpError> {
let graph = self.indexed_graph.graph();
let tx_graph = self.indexed_graph.graph();
let txout_index = &self.indexed_graph.index;
let chain_tip = self.chain.tip().block_id();
let chain_positions = graph
let chain_positions: HashMap<Txid, ChainPosition<_>> = tx_graph
.list_canonical_txs(&self.chain, chain_tip, CanonicalizationParams::default())
.map(|canon_tx| (canon_tx.tx_node.txid, canon_tx.chain_position))
.collect::<HashMap<Txid, _>>();
.collect();

let mut tx = graph
let mut tx = tx_graph
.get_tx(txid)
.ok_or(BuildFeeBumpError::TransactionNotFound(txid))?
.as_ref()
Expand All @@ -1746,73 +1746,62 @@ impl Wallet {
let fee = self
.calculate_fee(&tx)
.map_err(|_| BuildFeeBumpError::FeeRateUnavailable)?;
let fee_rate = self
.calculate_fee_rate(&tx)
.map_err(|_| BuildFeeBumpError::FeeRateUnavailable)?;
let fee_rate = fee / tx.weight();
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@nymius nymius Oct 31, 2025

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What's the rationale to not use calculate_fee_rate?

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@ValuedMammal ValuedMammal Oct 31, 2025

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It seemed redundant since calculate_fee_rate already calls calculate_fee, so I chose to inline the implementation here.


// Remove the inputs from the tx and process them.
let utxos = tx
let utxos: Vec<WeightedUtxo> = tx
.input
.drain(..)
.map(|txin| -> Result<_, BuildFeeBumpError> {
graph
// Get previous transaction.
.get_tx(txin.previous_output.txid)
.ok_or(BuildFeeBumpError::UnknownUtxo(txin.previous_output))
// Get chain position.
.and_then(|prev_tx| {
let outpoint = txin.previous_output;
let prev_txout = tx_graph
.get_txout(outpoint)
.cloned()
.ok_or(BuildFeeBumpError::UnknownUtxo(outpoint))?;
match txout_index.index_of_spk(prev_txout.script_pubkey.clone()) {
Some(&(keychain, derivation_index)) => {
let txout = prev_txout;
let chain_position = chain_positions
.get(&txin.previous_output.txid)
.get(&outpoint.txid)
.cloned()
.ok_or(BuildFeeBumpError::UnknownUtxo(txin.previous_output))?;
let prev_txout = prev_tx
.output
.get(txin.previous_output.vout as usize)
.ok_or(BuildFeeBumpError::InvalidOutputIndex(txin.previous_output))
.cloned()?;
Ok((prev_tx, prev_txout, chain_position))
})
.map(|(prev_tx, prev_txout, chain_position)| {
match txout_index.index_of_spk(prev_txout.script_pubkey.clone()) {
Some(&(keychain, derivation_index)) => WeightedUtxo {
satisfaction_weight: self
.public_descriptor(keychain)
.max_weight_to_satisfy()
.unwrap(),
utxo: Utxo::Local(LocalOutput {
outpoint: txin.previous_output,
txout: prev_txout.clone(),
keychain,
is_spent: true,
derivation_index,
chain_position,
}),
},
None => {
let satisfaction_weight = Weight::from_wu_usize(
serialize(&txin.script_sig).len() * 4
+ serialize(&txin.witness).len(),
);
WeightedUtxo {
utxo: Utxo::Foreign {
outpoint: txin.previous_output,
sequence: txin.sequence,
psbt_input: Box::new(psbt::Input {
witness_utxo: prev_txout
.script_pubkey
.witness_version()
.map(|_| prev_txout.clone()),
non_witness_utxo: Some(prev_tx.as_ref().clone()),
..Default::default()
}),
},
satisfaction_weight,
}
}
}
})
.ok_or(BuildFeeBumpError::TransactionNotFound(outpoint.txid))?;
Ok(WeightedUtxo {
satisfaction_weight: self
.public_descriptor(keychain)
.max_weight_to_satisfy()
.expect("descriptor should be satisfiable"),
utxo: Utxo::Local(LocalOutput {
outpoint,
txout,
keychain,
is_spent: true,
derivation_index,
chain_position,
}),
})
}
None => Ok(WeightedUtxo {
satisfaction_weight: Weight::from_wu_usize(
serialize(&txin.script_sig).len() * 4 + serialize(&txin.witness).len(),
),
utxo: Utxo::Foreign {
outpoint,
sequence: txin.sequence,
psbt_input: Box::new(psbt::Input {
witness_utxo: prev_txout
.script_pubkey
.witness_version()
.map(|_| prev_txout),
non_witness_utxo: tx_graph
.get_tx(outpoint.txid)
.map(|tx| tx.as_ref().clone()),
..Default::default()
}),
},
}),
}
})
.collect::<Result<Vec<WeightedUtxo>, BuildFeeBumpError>>()?;
.collect::<Result<_, _>>()?;

if tx.output.len() > 1 {
let mut change_index = None;
Expand All @@ -1832,7 +1821,6 @@ impl Wallet {
}

let params = TxParams {
// TODO: figure out what rbf option should be?
version: Some(tx.version),
recipients: tx
.output
Expand Down
54 changes: 53 additions & 1 deletion tests/add_foreign_utxo.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,9 @@ use bdk_wallet::signer::SignOptions;
use bdk_wallet::test_utils::*;
use bdk_wallet::tx_builder::AddForeignUtxoError;
use bdk_wallet::KeychainKind;
use bitcoin::{psbt, Address, Amount};
use bitcoin::{hashes::Hash, psbt, Address, Amount, FeeRate, OutPoint, TxOut, Weight};

use common::parse_descriptor;

mod common;

Expand Down Expand Up @@ -290,3 +292,53 @@ fn test_taproot_foreign_utxo() {
"foreign_utxo should be in there"
);
}

// Test that we can fee-bump a tx containing a foreign utxo
#[test]
fn test_add_foreign_utxo_build_fee_bump() {
let (mut wallet, _) = get_funded_wallet_wpkh();
let drain_spk = wallet
.next_unused_address(KeychainKind::External)
.script_pubkey();

let (desc, _) = parse_descriptor(get_test_tr_single_sig());
let spk = desc.at_derivation_index(0).unwrap().script_pubkey();
let witness_utxo = TxOut {
value: Amount::ONE_SAT,
script_pubkey: spk,
};
// Remember to include this as a "floating" txout in the wallet.
let outpoint = OutPoint::new(Hash::hash(b"prev"), 1);
wallet.insert_txout(outpoint, witness_utxo.clone());
let satisfaction_weight = Weight::from_wu(71);
let psbt_input = psbt::Input {
witness_utxo: Some(witness_utxo),
..Default::default()
};

let mut tx_builder = wallet.build_tx();
tx_builder
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@nymius nymius Oct 31, 2025

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The default fee rate of this tx is important but not expressed in the creation of the first tx of the test. A comment may be necessary here.

.add_foreign_utxo(outpoint, psbt_input, satisfaction_weight)
.unwrap()
.only_witness_utxo()
.fee_rate(FeeRate::from_sat_per_vb_unchecked(2))
.drain_to(drain_spk.clone());
let psbt = tx_builder.finish().unwrap();
let tx = psbt.unsigned_tx.clone();
assert!(tx.input.iter().any(|txin| txin.previous_output == outpoint));
let txid1 = tx.compute_txid();
wallet.apply_unconfirmed_txs([(tx, 123456)]);

// Now build fee bump.
let mut tx_builder = wallet
.build_fee_bump(txid1)
.expect("`build_fee_bump` should succeed");
tx_builder
.set_recipients(vec![])
.drain_to(drain_spk)
.only_witness_utxo()
.fee_rate(FeeRate::from_sat_per_vb_unchecked(5));
let psbt = tx_builder.finish().unwrap();
let tx = &psbt.unsigned_tx;
assert!(tx.input.iter().any(|txin| txin.previous_output == outpoint));
}