Add test_dynamic_spendable_outputs_local_htlc_success_tx

Author: Antoine Riard

src/ln/channelmanager.rs

@@ -7970,4 +7970,76 @@ mod tests {
 		};
 		check_spends!(spend_tx, node_txn[3].clone());
 	}
+
+	#[test]
+	fn test_dynamic_spendable_outputs_local_htlc_success_tx() {
+		let nodes = create_network(2);
+
+		// Create some initial channels
+		let chan_1 = create_announced_chan_between_nodes(&nodes, 0, 1);
+
+		let payment_preimage = route_payment(&nodes[0], &vec!(&nodes[1])[..], 9000000).0;
+		let local_txn = nodes[1].node.channel_state.lock().unwrap().by_id.get(&chan_1.2).unwrap().last_local_commitment_txn.clone();
+		assert_eq!(local_txn[0].input.len(), 1);
+		check_spends!(local_txn[0], chan_1.3.clone());
+
+		nodes[1].node.claim_funds(payment_preimage);
+		check_added_monitors!(nodes[1], 1);
+		let header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
+		nodes[1].chain_monitor.block_connected_with_filtering(&Block { header, txdata: vec![local_txn[0].clone()] }, 1);
+		let events = nodes[1].node.get_and_clear_pending_msg_events();
+		match events[0] {
+			MessageSendEvent::UpdateHTLCs { .. } => {},
+			_ => panic!("Unexpected event"),
+		}
+		match events[1] {
+			MessageSendEvent::BroadcastChannelUpdate { .. } => {},
+			_ => panic!("Unexepected event"),
+		}
+		let node_txn = nodes[1].tx_broadcaster.txn_broadcasted.lock().unwrap();
+		assert_eq!(node_txn[0].input.len(), 1);
+		assert_eq!(node_txn[0].input[0].witness.last().unwrap().len(), 138);
+		check_spends!(node_txn[0], local_txn[0].clone());
+
+		let events = nodes[1].chan_monitor.simple_monitor.get_and_clear_pending_events();
+		let spend_tx = match events[0] {
+			Event::SpendableOutputs { ref outputs } => {
+				match outputs[0] {
+					SpendableOutputDescriptor::DynamicOutput { ref outpoint, ref key, ref witness_script, ref to_self_delay } => {
+						let input = TxIn {
+							previous_output: outpoint.clone(),
+							script_sig: Script::new(),
+							sequence: *to_self_delay as u32,
+							witness: Vec::new(),
+						};
+						let output = TxOut {
+							script_pubkey: Builder::new().push_opcode(opcodes::All::OP_RETURN).into_script(),
+							value: node_txn[0].output[0].value,
+						};
+						let mut spend_tx = Transaction {
+							version: 2,
+							lock_time: 0,
+							input: vec![input],
+							output: vec![output],
+						};
+						if let Some(witness_script) = witness_script.clone() {
+							let sighash = Message::from_slice(&bip143::SighashComponents::new(&spend_tx).sighash_all(&spend_tx.input[0], &witness_script, node_txn[0].output[0].value)[..]).unwrap();
+							let secp_ctx = Secp256k1::new();
+							let local_delaysig = secp_ctx.sign(&sighash, key);
+							spend_tx.input[0].witness.push(local_delaysig.serialize_der(&secp_ctx).to_vec());
+							spend_tx.input[0].witness[0].push(SigHashType::All as u8);
+							spend_tx.input[0].witness.push(vec!(0));
+							spend_tx.input[0].witness.push(witness_script.clone().into_bytes());
+							spend_tx
+						} else {
+							panic!("Unexpected event");
+						}
+					},
+					_ => panic!("Unexpected event"),
+				}
+			},
+			_ => panic!("Unexpected event"),
+		};
+		check_spends!(spend_tx, node_txn[0].clone());
+	}
 }