WIP: Impl CoinSelectionSource

Author: tnull

src/wallet.rs

@@ -6,6 +6,7 @@ use lightning::chain::chaininterface::{
 	BroadcasterInterface, ConfirmationTarget, FeeEstimator, FEERATE_FLOOR_SATS_PER_KW,
 };
 
+use lightning::events::bump_transaction::CoinSelectionSource;
 use lightning::ln::msgs::{DecodeError, UnsignedGossipMessage};
 use lightning::ln::script::ShutdownScript;
 use lightning::sign::{
@@ -344,6 +345,38 @@ where
 	}
 }
 
+impl<D, L: Deref> CoinSelectionSource for Wallet<D, L>
+where
+	D: BatchDatabase,
+	L::Target: Logger,
+{
+	fn select_confirmed_utxos(
+		&self,
+		claim_id: lightning::chain::ClaimId,
+		must_spend: &[lightning::events::bump_transaction::Input],
+		must_pay_to: &[bitcoin::TxOut],
+		target_feerate_sat_per_1000_weight: u32
+	) -> Result<lightning::events::bump_transaction::CoinSelection, ()> {
+		let locked_wallet = self.inner.lock().unwrap();
+		let fee_rate = FeeRate::from_sat_per_kwu(target_feerate_sat_per_1000_weight as f32);
+
+		let mut tx_builder = locked_wallet.build_tx().fee_rate(fee_rate);
+
+		for i in must_spend {
+			tx_builder.add_foreign_utxo(i.outpoint, bitcoin::util::psbt::Input::default(), i.satisfaction_weight as usize);
+		}
+
+		for o in must_pay_to {
+			tx_builder.add_recipient(o.script_pubkey, o.value);
+		}
+
+	}
+
+	fn sign_tx(&self, tx: &mut bitcoin::Transaction) -> Result<(), ()> {
+		Ok(())
+	}
+}
+
 /// Similar to [`KeysManager`], but overrides the destination and shutdown scripts so they are
 /// directly spendable by the BDK wallet.
 pub struct WalletKeysManager<D, L: Deref>