fixup: use a real, already confirmed package to test submitpackage

Author: tankyleo

src/chain/electrum.rs

@@ -389,28 +389,6 @@ struct ElectrumRuntimeClient {
 	logger: Arc<Logger>,
 }
 
-fn dummy_transaction() -> Transaction {
-	Transaction {
-		version: bitcoin::transaction::Version::TWO,
-		lock_time: bitcoin::absolute::LockTime::ZERO,
-		input: vec![bitcoin::TxIn {
-			previous_output: bitcoin::OutPoint {
-				txid: bitcoin::Txid::from_raw_hash(bitcoin::hashes::Hash::from_byte_array(
-					[0u8; 32],
-				)),
-				vout: 0,
-			},
-			sequence: bitcoin::Sequence::MAX,
-			script_sig: bitcoin::ScriptBuf::new(),
-			witness: bitcoin::Witness::new(),
-		}],
-		output: vec![bitcoin::TxOut {
-			script_pubkey: bitcoin::ScriptBuf::new(),
-			value: bitcoin::Amount::ZERO,
-		}],
-	}
-}
-
 impl ElectrumRuntimeClient {
 	fn new(
 		server_url: String, sync_config: ElectrumSyncConfig, runtime: Arc<Runtime>,
@@ -430,10 +408,12 @@ impl ElectrumRuntimeClient {
 			})?,
 		);
 		if config.anchor_channels_config.is_some() {
-			electrum_client.transaction_broadcast_package(&[dummy_transaction()]).map_err(|e| {
-				log_error!(logger, "Electrum server does not support submit package: {:?}", e);
-				Error::ConnectionFailed
-			})?;
+			electrum_client.transaction_broadcast_package(&super::dummy_package()).map_err(
+				|e| {
+					log_error!(logger, "Electrum server does not support submit package: {:?}", e);
+					Error::ConnectionFailed
+				},
+			)?;
 		}
 		let bdk_electrum_client = Arc::new(BdkElectrumClient::new(Arc::clone(&electrum_client)));
 		let tx_sync = Arc::new(

src/chain/esplora.rs

@@ -40,28 +40,6 @@ pub(super) struct EsploraChainSource {
 	node_metrics: Arc<RwLock<NodeMetrics>>,
 }
 
-fn dummy_transaction() -> Transaction {
-	Transaction {
-		version: bitcoin::transaction::Version::TWO,
-		lock_time: bitcoin::absolute::LockTime::ZERO,
-		input: vec![bitcoin::TxIn {
-			previous_output: bitcoin::OutPoint {
-				txid: bitcoin::Txid::from_raw_hash(bitcoin::hashes::Hash::from_byte_array(
-					[0u8; 32],
-				)),
-				vout: 0,
-			},
-			sequence: bitcoin::Sequence::MAX,
-			script_sig: bitcoin::ScriptBuf::new(),
-			witness: bitcoin::Witness::new(),
-		}],
-		output: vec![bitcoin::TxOut {
-			script_pubkey: bitcoin::ScriptBuf::new(),
-			value: bitcoin::Amount::ZERO,
-		}],
-	}
-}
-
 impl EsploraChainSource {
 	pub(crate) async fn new(
 		server_url: String, headers: HashMap<String, String>, sync_config: EsploraSyncConfig,
@@ -81,7 +59,7 @@ impl EsploraChainSource {
 		})?;
 
 		if config.anchor_channels_config.is_some() {
-			esplora_client.submit_package(&[dummy_transaction()], None, None).await.map_err(
+			esplora_client.submit_package(&super::dummy_package(), None, None).await.map_err(
 				|e| {
 					log_error!(logger, "Esplora server does not support submit package: {:?}", e);
 				},

src/chain/mod.rs

@@ -29,6 +29,37 @@ use crate::runtime::Runtime;
 use crate::types::{Broadcaster, ChainMonitor, ChannelManager, DynStore, Sweeper, Wallet};
 use crate::{Error, NodeMetrics};
 
+/// We use this parent-child TRUC package to make sure the configured chain source supports
+/// broadcasting packages via the `submitpackage` Bitcoin Core RPC.
+const PARENT_TXID: &str = "9a015f93fac6cb203c2b994e18b85176eb0354a22a468255516f3c6002d3f696";
+const PARENT_HEX: &str =
+	"0300000000010160d0cdb72f2ddf719f40ca32f44614c67577fc75996140544003915683c34a310000000000fd\
+	ffffff0201000000000000000451024e73876100000000000022512042731375894dad3b25092cd0f713dc5bee4\
+	a71e30a95e1db3d880906d7eba1fa01409327942924218e4eb1635a7cce6706fcb37b8bbb61a2f0b86357356681\
+	4e09419a3501e02252043bb237d479304632282fe9159db9e9a6ae6ec5bedea9f0f115a97b0e00";
+const CHILD_TXID: &str = "d011b3ff78cdfb8b93822639ea87771847936b04bb83afc8763a7c02a386ae26";
+const CHILD_HEX: &str =
+	"0300000000010296f6d302603c6f515582462aa25403eb7651b8184e992b3c20cbc6fa935f019a0000000000ff\
+	ffffff96f6d302603c6f515582462aa25403eb7651b8184e992b3c20cbc6fa935f019a0100000000fdffffff015\
+	660000000000000225120ac18cd599a1be003595854e2eeec18dbe1c92d04b0ba05812d04445e3fcf16bc000140\
+	1462a35808d77a164f0a23a84c4721d1545befd09ad19945bb8aa0ea5576953a9699038725f944b1bc429942ef4\
+	7e6504a554babf022cb15db53be2d8c1dbfe5a97b0e00";
+
+fn dummy_package() -> [bitcoin::Transaction; 2] {
+	use bitcoin::consensus::Decodable;
+	use bitcoin::hex::FromHex;
+	use bitcoin::Transaction;
+	let parent_tx_bytes = Vec::from_hex(PARENT_HEX).expect("read from a constant");
+	let child_tx_bytes = Vec::from_hex(CHILD_HEX).expect("read from a constant");
+	let parent =
+		Transaction::consensus_decode(&mut &parent_tx_bytes[..]).expect("read from a constant");
+	let child =
+		Transaction::consensus_decode(&mut &child_tx_bytes[..]).expect("read from a constant");
+	assert_eq!(parent.compute_txid().to_string(), PARENT_TXID);
+	assert_eq!(child.compute_txid().to_string(), CHILD_TXID);
+	[parent, child]
+}
+
 pub(crate) enum WalletSyncStatus {
 	Completed,
 	InProgress { subscribers: tokio::sync::broadcast::Sender<Result<(), Error>> },