Add python integration test for spontaneous keysend payments#923

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tnull merged 2 commits into from
Jun 24, 2026
Merged

Add python integration test for spontaneous keysend payments #923

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7fa8d0f
Extract shared setup helpers in Python binding tests
heyolaniran Jun 15, 2026
b318ccd
Add spontaneous payment Python binding test
heyolaniran Jun 15, 2026
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154 changes: 104 additions & 50 deletions bindings/python/src/ldk_node/test_ldk_node.py
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -5,6 +5,7 @@
import os
import re
import requests
import socket

from ldk_node import *

Expand DownExpand Up@@ -118,8 +119,68 @@ def expect_event(node, expected_event_type):
assert isinstance(event, expected_event_type)
print("EVENT:", event)
node.event_handled()
return event

return event

def find_two_free_ports():
with socket.socket() as s1, socket.socket() as s2:
s1.bind(("127.0.0.1", 0))
s2.bind(("127.0.0.1",0))
port_1 = s1.getsockname()[1]
port_2 = s2.getsockname()[1]
return port_1, port_2

def setup_two_nodes(esplora_endpoint):
port_1, port_2 = find_two_free_ports()
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
listening_addresses_1 = [f"127.0.0.1:{port_1}"]
node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
node_1.start()
node_id_1 = node_1.node_id()

tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
listening_addresses_2 = [f"127.0.0.1:{port_2}"]
node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
node_2.start()
node_id_2 = node_2.node_id()

return node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2

def fund_nodes(node_1, node_2, esplora_endpoint, amount_sats=100000):
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address_1 = node_1.onchain_payment().new_address()
txid_1 = send_to_address(address_1, amount_sats)
address_2 = node_2.onchain_payment().new_address()
txid_2 = send_to_address(address_2, amount_sats)

wait_for_tx(esplora_endpoint, txid_1)
wait_for_tx(esplora_endpoint, txid_2)
mine_and_wait(esplora_endpoint, 6)

node_1.sync_wallets()
node_2.sync_wallets()

def open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_address_2, esplora_endpoint, channel_amount_sats=50000):
node_1.open_channel(node_id_2, listening_address_2, channel_amount_sats, None, None)

channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
expect_event(node_2, Event.CHANNEL_PENDING)

funding_txid = channel_pending_event_1.funding_txo.txid
wait_for_tx(esplora_endpoint, funding_txid)
mine_and_wait(esplora_endpoint, 6)

node_1.sync_wallets()
node_2.sync_wallets()

channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)
return channel_ready_event_1, channel_ready_event_2, funding_txid

def stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2):
node_1.stop()
node_2.stop()
time.sleep(1)
tmp_dir_1.cleanup()
tmp_dir_2.cleanup()

def assert_feature_helpers_return_bool(test_case, features):
feature_methods = [
Expand DownExpand Up@@ -153,45 +214,57 @@ def setUp(self):
esplora_endpoint = get_esplora_endpoint()
mine_and_wait(esplora_endpoint, 1)

def test_channel_full_cycle(self):
def test_spontaneous_payment(self):
"""Spontaneous payment test in python: keysend after channel ready."""
esplora_endpoint = get_esplora_endpoint()

## Setup Node 1
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
print("TMP DIR 1:", tmp_dir_1.name)
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
fund_nodes(node_1, node_2, esplora_endpoint)
open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)

listening_addresses_1 = ["127.0.0.1:2323"]
node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
node_1.start()
node_id_1 = node_1.node_id()
print("Node ID 1:", node_id_1)
keysend_amount_msat = 2_500_000
custom_tlvs = [CustomTlvRecord(type_num=13377331, value=bytes([1, 2, 3]))]
keysend_payment_id = node_1.spontaneous_payment().send_with_custom_tlvs(
keysend_amount_msat, node_id_2, None, custom_tlvs
)

expect_event(node_1, Event.PAYMENT_SUCCESSFUL)
received_event = expect_event(node_2, Event.PAYMENT_RECEIVED)

self.assertEqual(received_event.amount_msat, keysend_amount_msat)
self.assertEqual(received_event.custom_records, custom_tlvs)

# Setup Node 2
tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
print("TMP DIR 2:", tmp_dir_2.name)
sender_payment = node_1.payment(keysend_payment_id)
receiver_payment = node_2.payment(keysend_payment_id)

self.assertIsNotNone(sender_payment)
self.assertIsNotNone(receiver_payment)
self.assertEqual(sender_payment.status, PaymentStatus.SUCCEEDED)
self.assertEqual(sender_payment.direction, PaymentDirection.OUTBOUND)
self.assertEqual(sender_payment.amount_msat, keysend_amount_msat)
self.assertTrue(sender_payment.kind.is_spontaneous())

self.assertEqual(receiver_payment.status, PaymentStatus.SUCCEEDED)
self.assertEqual(receiver_payment.direction, PaymentDirection.INBOUND)
self.assertEqual(receiver_payment.amount_msat, keysend_amount_msat)
self.assertTrue(receiver_payment.kind.is_spontaneous())

stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

def test_channel_full_cycle(self):
esplora_endpoint = get_esplora_endpoint()

listening_addresses_2 = ["127.0.0.1:2324"]
node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
node_2.start()
node_id_2 = node_2.node_id()
## Setup two nodes
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
print("Node ID 1:", node_id_1)
print("Node ID 2:", node_id_2)

# Check node-announcement features exposed through NodeStatus.
for node in [node_1, node_2]:
node_features_exposed(self, node.status().node_features)

address_1 = node_1.onchain_payment().new_address()
txid_1 = send_to_address(address_1, 100000)
address_2 = node_2.onchain_payment().new_address()
txid_2 = send_to_address(address_2, 100000)

wait_for_tx(esplora_endpoint, txid_1)
wait_for_tx(esplora_endpoint, txid_2)

mine_and_wait(esplora_endpoint, 6)
fund_nodes(node_1, node_2, esplora_endpoint)

node_1.sync_wallets()
node_2.sync_wallets()

spendable_balance_1 = node_1.list_balances().spendable_onchain_balance_sats
spendable_balance_2 = node_2.list_balances().spendable_onchain_balance_sats
Expand All@@ -210,22 +283,9 @@ def test_channel_full_cycle(self):
print("TOTAL 2:", total_balance_2)
self.assertEqual(total_balance_2, 100000)

node_1.open_channel(node_id_2, listening_addresses_2[0], 50000, None, None)


channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
channel_pending_event_2 = expect_event(node_2, Event.CHANNEL_PENDING)
funding_txid = channel_pending_event_1.funding_txo.txid
wait_for_tx(esplora_endpoint, funding_txid)
mine_and_wait(esplora_endpoint, 6)

node_1.sync_wallets()
node_2.sync_wallets()

channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
channel_ready_event_1, channel_ready_event_2, funding_txid = open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)
print("funding_txo:", funding_txid)

channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)

# Check negotiated init features exposed through ChannelDetails.
for channel in [node_1.list_channels()[0], node_2.list_channels()[0]]:
Expand DownExpand Up@@ -259,13 +319,7 @@ def test_channel_full_cycle(self):
self.assertEqual(spendable_balance_after_close_2, 102500)

# Stop nodes
node_1.stop()
node_2.stop()

# Cleanup
time.sleep(1) # Wait a sec so our logs can finish writing
tmp_dir_1.cleanup()
tmp_dir_2.cleanup()
stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

if __name__ == '__main__':
unittest.main()
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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 Add python integration test for spontaneous keysend payments#923

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 Merged

tnull
merged 2 commits into

from

Jun 24, 2026
 Merged


Add python integration test for spontaneous keysend payments
#923
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7fa8d0f

Extract shared setup helpers in Python binding tests


heyolaniran Jun 15, 2026
b318ccd

Add spontaneous payment Python binding test


heyolaniran Jun 15, 2026

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154 changes: 104 additions & 50 deletions
bindings/python/src/ldk_node/test_ldk_node.py

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,6 +5,7 @@
import os
import re
import requests
import socket

from ldk_node import *

Expand DownExpand Up@@ -118,8 +119,68 @@ def expect_event(node, expected_event_type):
 assert isinstance(event, expected_event_type)
 print("EVENT:", event)
 node.event_handled()
 return event 

 return event

def find_two_free_ports():
 with socket.socket() as s1, socket.socket() as s2:
 s1.bind(("127.0.0.1", 0))
 s2.bind(("127.0.0.1",0))
 port_1 = s1.getsockname()[1]
 port_2 = s2.getsockname()[1]
 return port_1, port_2

def setup_two_nodes(esplora_endpoint):
 port_1, port_2 = find_two_free_ports()
 tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
 listening_addresses_1 = [f"127.0.0.1:{port_1}"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()

 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 listening_addresses_2 = [f"127.0.0.1:{port_2}"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()

 return node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2

def fund_nodes(node_1, node_2, esplora_endpoint, amount_sats=100000):
Comment thread
heyolaniran marked this conversation as resolved.

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, amount_sats)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, amount_sats)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

def open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_address_2, esplora_endpoint, channel_amount_sats=50000):
 node_1.open_channel(node_id_2, listening_address_2, channel_amount_sats, None, None)

 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 expect_event(node_2, Event.CHANNEL_PENDING)

 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)
 return channel_ready_event_1, channel_ready_event_2, funding_txid

def stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2):
 node_1.stop()
 node_2.stop()
 time.sleep(1)
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()

def assert_feature_helpers_return_bool(test_case, features):
 feature_methods = [
Expand DownExpand Up@@ -153,45 +214,57 @@ def setUp(self):
 esplora_endpoint = get_esplora_endpoint()
 mine_and_wait(esplora_endpoint, 1)

 def test_channel_full_cycle(self):
 def test_spontaneous_payment(self):
 """Spontaneous payment test in python: keysend after channel ready."""
 esplora_endpoint = get_esplora_endpoint()

## Setup Node 1
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
print("TMP DIR 1:", tmp_dir_1.name)
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
fund_nodes(node_1, node_2, esplora_endpoint)
open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)

 listening_addresses_1 = ["127.0.0.1:2323"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()
 print("Node ID 1:", node_id_1)
 keysend_amount_msat = 2_500_000
 custom_tlvs = [CustomTlvRecord(type_num=13377331, value=bytes([1, 2, 3]))]
 keysend_payment_id = node_1.spontaneous_payment().send_with_custom_tlvs(
 keysend_amount_msat, node_id_2, None, custom_tlvs
 )

 expect_event(node_1, Event.PAYMENT_SUCCESSFUL)
 received_event = expect_event(node_2, Event.PAYMENT_RECEIVED)

 self.assertEqual(received_event.amount_msat, keysend_amount_msat)
 self.assertEqual(received_event.custom_records, custom_tlvs)

 # Setup Node 2
 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 print("TMP DIR 2:", tmp_dir_2.name)
 sender_payment = node_1.payment(keysend_payment_id)
 receiver_payment = node_2.payment(keysend_payment_id)

 self.assertIsNotNone(sender_payment)
 self.assertIsNotNone(receiver_payment)
 self.assertEqual(sender_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(sender_payment.direction, PaymentDirection.OUTBOUND)
 self.assertEqual(sender_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(sender_payment.kind.is_spontaneous())

 self.assertEqual(receiver_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(receiver_payment.direction, PaymentDirection.INBOUND)
 self.assertEqual(receiver_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(receiver_payment.kind.is_spontaneous())

 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

 def test_channel_full_cycle(self):
 esplora_endpoint = get_esplora_endpoint()

 listening_addresses_2 = ["127.0.0.1:2324"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()
 ## Setup two nodes 
 node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
 print("Node ID 1:", node_id_1)
 print("Node ID 2:", node_id_2)

 # Check node-announcement features exposed through NodeStatus.
 for node in [node_1, node_2]:
 node_features_exposed(self, node.status().node_features)

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, 100000)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, 100000)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)

 mine_and_wait(esplora_endpoint, 6)
 fund_nodes(node_1, node_2, esplora_endpoint)

 node_1.sync_wallets()
 node_2.sync_wallets()

 spendable_balance_1 = node_1.list_balances().spendable_onchain_balance_sats
 spendable_balance_2 = node_2.list_balances().spendable_onchain_balance_sats
Expand All@@ -210,22 +283,9 @@ def test_channel_full_cycle(self):
 print("TOTAL 2:", total_balance_2)
 self.assertEqual(total_balance_2, 100000)

 node_1.open_channel(node_id_2, listening_addresses_2[0], 50000, None, None)


 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 channel_pending_event_2 = expect_event(node_2, Event.CHANNEL_PENDING)
 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_1, channel_ready_event_2, funding_txid = open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)
 print("funding_txo:", funding_txid)

 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)

 # Check negotiated init features exposed through ChannelDetails.
 for channel in [node_1.list_channels()[0], node_2.list_channels()[0]]:
Expand DownExpand Up@@ -259,13 +319,7 @@ def test_channel_full_cycle(self):
 self.assertEqual(spendable_balance_after_close_2, 102500)

 # Stop nodes
 node_1.stop()
 node_2.stop()

 # Cleanup
 time.sleep(1) # Wait a sec so our logs can finish writing
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()
 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

if __name__ == '__main__':
 unittest.main()
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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 Add python integration test for spontaneous keysend payments#923

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 Merged

tnull
merged 2 commits into

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Jun 24, 2026
 Merged


Add python integration test for spontaneous keysend payments
#923
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7fa8d0f

Extract shared setup helpers in Python binding tests


heyolaniran Jun 15, 2026
b318ccd

Add spontaneous payment Python binding test


heyolaniran Jun 15, 2026

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154 changes: 104 additions & 50 deletions
bindings/python/src/ldk_node/test_ldk_node.py

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,6 +5,7 @@
import os
import re
import requests
import socket

from ldk_node import *

Expand DownExpand Up@@ -118,8 +119,68 @@ def expect_event(node, expected_event_type):
 assert isinstance(event, expected_event_type)
 print("EVENT:", event)
 node.event_handled()
 return event 

 return event

def find_two_free_ports():
 with socket.socket() as s1, socket.socket() as s2:
 s1.bind(("127.0.0.1", 0))
 s2.bind(("127.0.0.1",0))
 port_1 = s1.getsockname()[1]
 port_2 = s2.getsockname()[1]
 return port_1, port_2

def setup_two_nodes(esplora_endpoint):
 port_1, port_2 = find_two_free_ports()
 tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
 listening_addresses_1 = [f"127.0.0.1:{port_1}"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()

 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 listening_addresses_2 = [f"127.0.0.1:{port_2}"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()

 return node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2

def fund_nodes(node_1, node_2, esplora_endpoint, amount_sats=100000):
Comment thread
heyolaniran marked this conversation as resolved.

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, amount_sats)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, amount_sats)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

def open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_address_2, esplora_endpoint, channel_amount_sats=50000):
 node_1.open_channel(node_id_2, listening_address_2, channel_amount_sats, None, None)

 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 expect_event(node_2, Event.CHANNEL_PENDING)

 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)
 return channel_ready_event_1, channel_ready_event_2, funding_txid

def stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2):
 node_1.stop()
 node_2.stop()
 time.sleep(1)
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()

def assert_feature_helpers_return_bool(test_case, features):
 feature_methods = [
Expand DownExpand Up@@ -153,45 +214,57 @@ def setUp(self):
 esplora_endpoint = get_esplora_endpoint()
 mine_and_wait(esplora_endpoint, 1)

 def test_channel_full_cycle(self):
 def test_spontaneous_payment(self):
 """Spontaneous payment test in python: keysend after channel ready."""
 esplora_endpoint = get_esplora_endpoint()

## Setup Node 1
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
print("TMP DIR 1:", tmp_dir_1.name)
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
fund_nodes(node_1, node_2, esplora_endpoint)
open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)

 listening_addresses_1 = ["127.0.0.1:2323"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()
 print("Node ID 1:", node_id_1)
 keysend_amount_msat = 2_500_000
 custom_tlvs = [CustomTlvRecord(type_num=13377331, value=bytes([1, 2, 3]))]
 keysend_payment_id = node_1.spontaneous_payment().send_with_custom_tlvs(
 keysend_amount_msat, node_id_2, None, custom_tlvs
 )

 expect_event(node_1, Event.PAYMENT_SUCCESSFUL)
 received_event = expect_event(node_2, Event.PAYMENT_RECEIVED)

 self.assertEqual(received_event.amount_msat, keysend_amount_msat)
 self.assertEqual(received_event.custom_records, custom_tlvs)

 # Setup Node 2
 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 print("TMP DIR 2:", tmp_dir_2.name)
 sender_payment = node_1.payment(keysend_payment_id)
 receiver_payment = node_2.payment(keysend_payment_id)

 self.assertIsNotNone(sender_payment)
 self.assertIsNotNone(receiver_payment)
 self.assertEqual(sender_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(sender_payment.direction, PaymentDirection.OUTBOUND)
 self.assertEqual(sender_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(sender_payment.kind.is_spontaneous())

 self.assertEqual(receiver_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(receiver_payment.direction, PaymentDirection.INBOUND)
 self.assertEqual(receiver_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(receiver_payment.kind.is_spontaneous())

 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

 def test_channel_full_cycle(self):
 esplora_endpoint = get_esplora_endpoint()

 listening_addresses_2 = ["127.0.0.1:2324"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()
 ## Setup two nodes 
 node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
 print("Node ID 1:", node_id_1)
 print("Node ID 2:", node_id_2)

 # Check node-announcement features exposed through NodeStatus.
 for node in [node_1, node_2]:
 node_features_exposed(self, node.status().node_features)

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, 100000)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, 100000)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)

 mine_and_wait(esplora_endpoint, 6)
 fund_nodes(node_1, node_2, esplora_endpoint)

 node_1.sync_wallets()
 node_2.sync_wallets()

 spendable_balance_1 = node_1.list_balances().spendable_onchain_balance_sats
 spendable_balance_2 = node_2.list_balances().spendable_onchain_balance_sats
Expand All@@ -210,22 +283,9 @@ def test_channel_full_cycle(self):
 print("TOTAL 2:", total_balance_2)
 self.assertEqual(total_balance_2, 100000)

 node_1.open_channel(node_id_2, listening_addresses_2[0], 50000, None, None)


 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 channel_pending_event_2 = expect_event(node_2, Event.CHANNEL_PENDING)
 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_1, channel_ready_event_2, funding_txid = open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)
 print("funding_txo:", funding_txid)

 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)

 # Check negotiated init features exposed through ChannelDetails.
 for channel in [node_1.list_channels()[0], node_2.list_channels()[0]]:
Expand DownExpand Up@@ -259,13 +319,7 @@ def test_channel_full_cycle(self):
 self.assertEqual(spendable_balance_after_close_2, 102500)

 # Stop nodes
 node_1.stop()
 node_2.stop()

 # Cleanup
 time.sleep(1) # Wait a sec so our logs can finish writing
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()
 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

if __name__ == '__main__':
 unittest.main()
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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 Merged

tnull
merged 2 commits into

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Jun 24, 2026
 Merged


Add python integration test for spontaneous keysend payments
#923
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7fa8d0f

Extract shared setup helpers in Python binding tests


heyolaniran Jun 15, 2026
b318ccd

Add spontaneous payment Python binding test


heyolaniran Jun 15, 2026

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154 changes: 104 additions & 50 deletions
bindings/python/src/ldk_node/test_ldk_node.py

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,6 +5,7 @@
import os
import re
import requests
import socket

from ldk_node import *

Expand DownExpand Up@@ -118,8 +119,68 @@ def expect_event(node, expected_event_type):
 assert isinstance(event, expected_event_type)
 print("EVENT:", event)
 node.event_handled()
 return event 

 return event

def find_two_free_ports():
 with socket.socket() as s1, socket.socket() as s2:
 s1.bind(("127.0.0.1", 0))
 s2.bind(("127.0.0.1",0))
 port_1 = s1.getsockname()[1]
 port_2 = s2.getsockname()[1]
 return port_1, port_2

def setup_two_nodes(esplora_endpoint):
 port_1, port_2 = find_two_free_ports()
 tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
 listening_addresses_1 = [f"127.0.0.1:{port_1}"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()

 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 listening_addresses_2 = [f"127.0.0.1:{port_2}"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()

 return node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2

def fund_nodes(node_1, node_2, esplora_endpoint, amount_sats=100000):
Comment thread
heyolaniran marked this conversation as resolved.

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, amount_sats)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, amount_sats)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

def open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_address_2, esplora_endpoint, channel_amount_sats=50000):
 node_1.open_channel(node_id_2, listening_address_2, channel_amount_sats, None, None)

 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 expect_event(node_2, Event.CHANNEL_PENDING)

 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)
 return channel_ready_event_1, channel_ready_event_2, funding_txid

def stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2):
 node_1.stop()
 node_2.stop()
 time.sleep(1)
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()

def assert_feature_helpers_return_bool(test_case, features):
 feature_methods = [
Expand DownExpand Up@@ -153,45 +214,57 @@ def setUp(self):
 esplora_endpoint = get_esplora_endpoint()
 mine_and_wait(esplora_endpoint, 1)

 def test_channel_full_cycle(self):
 def test_spontaneous_payment(self):
 """Spontaneous payment test in python: keysend after channel ready."""
 esplora_endpoint = get_esplora_endpoint()

## Setup Node 1
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
print("TMP DIR 1:", tmp_dir_1.name)
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
fund_nodes(node_1, node_2, esplora_endpoint)
open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)

 listening_addresses_1 = ["127.0.0.1:2323"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()
 print("Node ID 1:", node_id_1)
 keysend_amount_msat = 2_500_000
 custom_tlvs = [CustomTlvRecord(type_num=13377331, value=bytes([1, 2, 3]))]
 keysend_payment_id = node_1.spontaneous_payment().send_with_custom_tlvs(
 keysend_amount_msat, node_id_2, None, custom_tlvs
 )

 expect_event(node_1, Event.PAYMENT_SUCCESSFUL)
 received_event = expect_event(node_2, Event.PAYMENT_RECEIVED)

 self.assertEqual(received_event.amount_msat, keysend_amount_msat)
 self.assertEqual(received_event.custom_records, custom_tlvs)

 # Setup Node 2
 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 print("TMP DIR 2:", tmp_dir_2.name)
 sender_payment = node_1.payment(keysend_payment_id)
 receiver_payment = node_2.payment(keysend_payment_id)

 self.assertIsNotNone(sender_payment)
 self.assertIsNotNone(receiver_payment)
 self.assertEqual(sender_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(sender_payment.direction, PaymentDirection.OUTBOUND)
 self.assertEqual(sender_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(sender_payment.kind.is_spontaneous())

 self.assertEqual(receiver_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(receiver_payment.direction, PaymentDirection.INBOUND)
 self.assertEqual(receiver_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(receiver_payment.kind.is_spontaneous())

 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

 def test_channel_full_cycle(self):
 esplora_endpoint = get_esplora_endpoint()

 listening_addresses_2 = ["127.0.0.1:2324"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()
 ## Setup two nodes 
 node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
 print("Node ID 1:", node_id_1)
 print("Node ID 2:", node_id_2)

 # Check node-announcement features exposed through NodeStatus.
 for node in [node_1, node_2]:
 node_features_exposed(self, node.status().node_features)

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, 100000)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, 100000)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)

 mine_and_wait(esplora_endpoint, 6)
 fund_nodes(node_1, node_2, esplora_endpoint)

 node_1.sync_wallets()
 node_2.sync_wallets()

 spendable_balance_1 = node_1.list_balances().spendable_onchain_balance_sats
 spendable_balance_2 = node_2.list_balances().spendable_onchain_balance_sats
Expand All@@ -210,22 +283,9 @@ def test_channel_full_cycle(self):
 print("TOTAL 2:", total_balance_2)
 self.assertEqual(total_balance_2, 100000)

 node_1.open_channel(node_id_2, listening_addresses_2[0], 50000, None, None)


 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 channel_pending_event_2 = expect_event(node_2, Event.CHANNEL_PENDING)
 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_1, channel_ready_event_2, funding_txid = open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)
 print("funding_txo:", funding_txid)

 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)

 # Check negotiated init features exposed through ChannelDetails.
 for channel in [node_1.list_channels()[0], node_2.list_channels()[0]]:
Expand DownExpand Up@@ -259,13 +319,7 @@ def test_channel_full_cycle(self):
 self.assertEqual(spendable_balance_after_close_2, 102500)

 # Stop nodes
 node_1.stop()
 node_2.stop()

 # Cleanup
 time.sleep(1) # Wait a sec so our logs can finish writing
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()
 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

if __name__ == '__main__':
 unittest.main()
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
 Add python integration test for spontaneous keysend payments#923

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 Merged

tnull
merged 2 commits into

from

Jun 24, 2026
 Merged


Add python integration test for spontaneous keysend payments
#923
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7fa8d0f

Extract shared setup helpers in Python binding tests


heyolaniran Jun 15, 2026
b318ccd

Add spontaneous payment Python binding test


heyolaniran Jun 15, 2026

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154 changes: 104 additions & 50 deletions
bindings/python/src/ldk_node/test_ldk_node.py

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,6 +5,7 @@
import os
import re
import requests
import socket

from ldk_node import *

Expand DownExpand Up@@ -118,8 +119,68 @@ def expect_event(node, expected_event_type):
 assert isinstance(event, expected_event_type)
 print("EVENT:", event)
 node.event_handled()
 return event 

 return event

def find_two_free_ports():
 with socket.socket() as s1, socket.socket() as s2:
 s1.bind(("127.0.0.1", 0))
 s2.bind(("127.0.0.1",0))
 port_1 = s1.getsockname()[1]
 port_2 = s2.getsockname()[1]
 return port_1, port_2

def setup_two_nodes(esplora_endpoint):
 port_1, port_2 = find_two_free_ports()
 tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
 listening_addresses_1 = [f"127.0.0.1:{port_1}"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()

 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 listening_addresses_2 = [f"127.0.0.1:{port_2}"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()

 return node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2

def fund_nodes(node_1, node_2, esplora_endpoint, amount_sats=100000):
Comment thread
heyolaniran marked this conversation as resolved.

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, amount_sats)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, amount_sats)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

def open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_address_2, esplora_endpoint, channel_amount_sats=50000):
 node_1.open_channel(node_id_2, listening_address_2, channel_amount_sats, None, None)

 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 expect_event(node_2, Event.CHANNEL_PENDING)

 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)
 return channel_ready_event_1, channel_ready_event_2, funding_txid

def stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2):
 node_1.stop()
 node_2.stop()
 time.sleep(1)
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()

def assert_feature_helpers_return_bool(test_case, features):
 feature_methods = [
Expand DownExpand Up@@ -153,45 +214,57 @@ def setUp(self):
 esplora_endpoint = get_esplora_endpoint()
 mine_and_wait(esplora_endpoint, 1)

 def test_channel_full_cycle(self):
 def test_spontaneous_payment(self):
 """Spontaneous payment test in python: keysend after channel ready."""
 esplora_endpoint = get_esplora_endpoint()

## Setup Node 1
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
print("TMP DIR 1:", tmp_dir_1.name)
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
fund_nodes(node_1, node_2, esplora_endpoint)
open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)

 listening_addresses_1 = ["127.0.0.1:2323"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()
 print("Node ID 1:", node_id_1)
 keysend_amount_msat = 2_500_000
 custom_tlvs = [CustomTlvRecord(type_num=13377331, value=bytes([1, 2, 3]))]
 keysend_payment_id = node_1.spontaneous_payment().send_with_custom_tlvs(
 keysend_amount_msat, node_id_2, None, custom_tlvs
 )

 expect_event(node_1, Event.PAYMENT_SUCCESSFUL)
 received_event = expect_event(node_2, Event.PAYMENT_RECEIVED)

 self.assertEqual(received_event.amount_msat, keysend_amount_msat)
 self.assertEqual(received_event.custom_records, custom_tlvs)

 # Setup Node 2
 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 print("TMP DIR 2:", tmp_dir_2.name)
 sender_payment = node_1.payment(keysend_payment_id)
 receiver_payment = node_2.payment(keysend_payment_id)

 self.assertIsNotNone(sender_payment)
 self.assertIsNotNone(receiver_payment)
 self.assertEqual(sender_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(sender_payment.direction, PaymentDirection.OUTBOUND)
 self.assertEqual(sender_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(sender_payment.kind.is_spontaneous())

 self.assertEqual(receiver_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(receiver_payment.direction, PaymentDirection.INBOUND)
 self.assertEqual(receiver_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(receiver_payment.kind.is_spontaneous())

 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

 def test_channel_full_cycle(self):
 esplora_endpoint = get_esplora_endpoint()

 listening_addresses_2 = ["127.0.0.1:2324"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()
 ## Setup two nodes 
 node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
 print("Node ID 1:", node_id_1)
 print("Node ID 2:", node_id_2)

 # Check node-announcement features exposed through NodeStatus.
 for node in [node_1, node_2]:
 node_features_exposed(self, node.status().node_features)

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, 100000)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, 100000)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)

 mine_and_wait(esplora_endpoint, 6)
 fund_nodes(node_1, node_2, esplora_endpoint)

 node_1.sync_wallets()
 node_2.sync_wallets()

 spendable_balance_1 = node_1.list_balances().spendable_onchain_balance_sats
 spendable_balance_2 = node_2.list_balances().spendable_onchain_balance_sats
Expand All@@ -210,22 +283,9 @@ def test_channel_full_cycle(self):
 print("TOTAL 2:", total_balance_2)
 self.assertEqual(total_balance_2, 100000)

 node_1.open_channel(node_id_2, listening_addresses_2[0], 50000, None, None)


 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 channel_pending_event_2 = expect_event(node_2, Event.CHANNEL_PENDING)
 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_1, channel_ready_event_2, funding_txid = open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)
 print("funding_txo:", funding_txid)

 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)

 # Check negotiated init features exposed through ChannelDetails.
 for channel in [node_1.list_channels()[0], node_2.list_channels()[0]]:
Expand DownExpand Up@@ -259,13 +319,7 @@ def test_channel_full_cycle(self):
 self.assertEqual(spendable_balance_after_close_2, 102500)

 # Stop nodes
 node_1.stop()
 node_2.stop()

 # Cleanup
 time.sleep(1) # Wait a sec so our logs can finish writing
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()
 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

if __name__ == '__main__':
 unittest.main()
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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tnull
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Jun 24, 2026
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Add python integration test for spontaneous keysend payments
#923
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7fa8d0f

Extract shared setup helpers in Python binding tests


heyolaniran Jun 15, 2026
b318ccd

Add spontaneous payment Python binding test


heyolaniran Jun 15, 2026

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154 changes: 104 additions & 50 deletions
bindings/python/src/ldk_node/test_ldk_node.py

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,6 +5,7 @@
import os
import re
import requests
import socket

from ldk_node import *

Expand DownExpand Up@@ -118,8 +119,68 @@ def expect_event(node, expected_event_type):
 assert isinstance(event, expected_event_type)
 print("EVENT:", event)
 node.event_handled()
 return event 

 return event

def find_two_free_ports():
 with socket.socket() as s1, socket.socket() as s2:
 s1.bind(("127.0.0.1", 0))
 s2.bind(("127.0.0.1",0))
 port_1 = s1.getsockname()[1]
 port_2 = s2.getsockname()[1]
 return port_1, port_2

def setup_two_nodes(esplora_endpoint):
 port_1, port_2 = find_two_free_ports()
 tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
 listening_addresses_1 = [f"127.0.0.1:{port_1}"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()

 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 listening_addresses_2 = [f"127.0.0.1:{port_2}"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()

 return node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2

def fund_nodes(node_1, node_2, esplora_endpoint, amount_sats=100000):
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heyolaniran marked this conversation as resolved.

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, amount_sats)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, amount_sats)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

def open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_address_2, esplora_endpoint, channel_amount_sats=50000):
 node_1.open_channel(node_id_2, listening_address_2, channel_amount_sats, None, None)

 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 expect_event(node_2, Event.CHANNEL_PENDING)

 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)
 return channel_ready_event_1, channel_ready_event_2, funding_txid

def stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2):
 node_1.stop()
 node_2.stop()
 time.sleep(1)
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()

def assert_feature_helpers_return_bool(test_case, features):
 feature_methods = [
Expand DownExpand Up@@ -153,45 +214,57 @@ def setUp(self):
 esplora_endpoint = get_esplora_endpoint()
 mine_and_wait(esplora_endpoint, 1)

 def test_channel_full_cycle(self):
 def test_spontaneous_payment(self):
 """Spontaneous payment test in python: keysend after channel ready."""
 esplora_endpoint = get_esplora_endpoint()

## Setup Node 1
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
print("TMP DIR 1:", tmp_dir_1.name)
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
fund_nodes(node_1, node_2, esplora_endpoint)
open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)

 listening_addresses_1 = ["127.0.0.1:2323"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()
 print("Node ID 1:", node_id_1)
 keysend_amount_msat = 2_500_000
 custom_tlvs = [CustomTlvRecord(type_num=13377331, value=bytes([1, 2, 3]))]
 keysend_payment_id = node_1.spontaneous_payment().send_with_custom_tlvs(
 keysend_amount_msat, node_id_2, None, custom_tlvs
 )

 expect_event(node_1, Event.PAYMENT_SUCCESSFUL)
 received_event = expect_event(node_2, Event.PAYMENT_RECEIVED)

 self.assertEqual(received_event.amount_msat, keysend_amount_msat)
 self.assertEqual(received_event.custom_records, custom_tlvs)

 # Setup Node 2
 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 print("TMP DIR 2:", tmp_dir_2.name)
 sender_payment = node_1.payment(keysend_payment_id)
 receiver_payment = node_2.payment(keysend_payment_id)

 self.assertIsNotNone(sender_payment)
 self.assertIsNotNone(receiver_payment)
 self.assertEqual(sender_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(sender_payment.direction, PaymentDirection.OUTBOUND)
 self.assertEqual(sender_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(sender_payment.kind.is_spontaneous())

 self.assertEqual(receiver_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(receiver_payment.direction, PaymentDirection.INBOUND)
 self.assertEqual(receiver_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(receiver_payment.kind.is_spontaneous())

 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

 def test_channel_full_cycle(self):
 esplora_endpoint = get_esplora_endpoint()

 listening_addresses_2 = ["127.0.0.1:2324"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()
 ## Setup two nodes 
 node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
 print("Node ID 1:", node_id_1)
 print("Node ID 2:", node_id_2)

 # Check node-announcement features exposed through NodeStatus.
 for node in [node_1, node_2]:
 node_features_exposed(self, node.status().node_features)

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, 100000)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, 100000)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)

 mine_and_wait(esplora_endpoint, 6)
 fund_nodes(node_1, node_2, esplora_endpoint)

 node_1.sync_wallets()
 node_2.sync_wallets()

 spendable_balance_1 = node_1.list_balances().spendable_onchain_balance_sats
 spendable_balance_2 = node_2.list_balances().spendable_onchain_balance_sats
Expand All@@ -210,22 +283,9 @@ def test_channel_full_cycle(self):
 print("TOTAL 2:", total_balance_2)
 self.assertEqual(total_balance_2, 100000)

 node_1.open_channel(node_id_2, listening_addresses_2[0], 50000, None, None)


 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 channel_pending_event_2 = expect_event(node_2, Event.CHANNEL_PENDING)
 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_1, channel_ready_event_2, funding_txid = open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)
 print("funding_txo:", funding_txid)

 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)

 # Check negotiated init features exposed through ChannelDetails.
 for channel in [node_1.list_channels()[0], node_2.list_channels()[0]]:
Expand DownExpand Up@@ -259,13 +319,7 @@ def test_channel_full_cycle(self):
 self.assertEqual(spendable_balance_after_close_2, 102500)

 # Stop nodes
 node_1.stop()
 node_2.stop()

 # Cleanup
 time.sleep(1) # Wait a sec so our logs can finish writing
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()
 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

if __name__ == '__main__':
 unittest.main()
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
 Add python integration test for spontaneous keysend payments#923

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 Merged

tnull
merged 2 commits into

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Jun 24, 2026
 Merged


Add python integration test for spontaneous keysend payments
#923
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7fa8d0f

Extract shared setup helpers in Python binding tests


heyolaniran Jun 15, 2026
b318ccd

Add spontaneous payment Python binding test


heyolaniran Jun 15, 2026

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154 changes: 104 additions & 50 deletions
bindings/python/src/ldk_node/test_ldk_node.py

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -5,6 +5,7 @@
import os
import re
import requests
import socket

from ldk_node import *

Expand DownExpand Up@@ -118,8 +119,68 @@ def expect_event(node, expected_event_type):
 assert isinstance(event, expected_event_type)
 print("EVENT:", event)
 node.event_handled()
 return event 

 return event

def find_two_free_ports():
 with socket.socket() as s1, socket.socket() as s2:
 s1.bind(("127.0.0.1", 0))
 s2.bind(("127.0.0.1",0))
 port_1 = s1.getsockname()[1]
 port_2 = s2.getsockname()[1]
 return port_1, port_2

def setup_two_nodes(esplora_endpoint):
 port_1, port_2 = find_two_free_ports()
 tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
 listening_addresses_1 = [f"127.0.0.1:{port_1}"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()

 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 listening_addresses_2 = [f"127.0.0.1:{port_2}"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()

 return node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2

def fund_nodes(node_1, node_2, esplora_endpoint, amount_sats=100000):
Comment thread
heyolaniran marked this conversation as resolved.

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, amount_sats)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, amount_sats)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

def open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_address_2, esplora_endpoint, channel_amount_sats=50000):
 node_1.open_channel(node_id_2, listening_address_2, channel_amount_sats, None, None)

 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 expect_event(node_2, Event.CHANNEL_PENDING)

 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)
 return channel_ready_event_1, channel_ready_event_2, funding_txid

def stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2):
 node_1.stop()
 node_2.stop()
 time.sleep(1)
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()

def assert_feature_helpers_return_bool(test_case, features):
 feature_methods = [
Expand DownExpand Up@@ -153,45 +214,57 @@ def setUp(self):
 esplora_endpoint = get_esplora_endpoint()
 mine_and_wait(esplora_endpoint, 1)

 def test_channel_full_cycle(self):
 def test_spontaneous_payment(self):
 """Spontaneous payment test in python: keysend after channel ready."""
 esplora_endpoint = get_esplora_endpoint()

## Setup Node 1
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
print("TMP DIR 1:", tmp_dir_1.name)
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
fund_nodes(node_1, node_2, esplora_endpoint)
open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)

 listening_addresses_1 = ["127.0.0.1:2323"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()
 print("Node ID 1:", node_id_1)
 keysend_amount_msat = 2_500_000
 custom_tlvs = [CustomTlvRecord(type_num=13377331, value=bytes([1, 2, 3]))]
 keysend_payment_id = node_1.spontaneous_payment().send_with_custom_tlvs(
 keysend_amount_msat, node_id_2, None, custom_tlvs
 )

 expect_event(node_1, Event.PAYMENT_SUCCESSFUL)
 received_event = expect_event(node_2, Event.PAYMENT_RECEIVED)

 self.assertEqual(received_event.amount_msat, keysend_amount_msat)
 self.assertEqual(received_event.custom_records, custom_tlvs)

 # Setup Node 2
 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 print("TMP DIR 2:", tmp_dir_2.name)
 sender_payment = node_1.payment(keysend_payment_id)
 receiver_payment = node_2.payment(keysend_payment_id)

 self.assertIsNotNone(sender_payment)
 self.assertIsNotNone(receiver_payment)
 self.assertEqual(sender_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(sender_payment.direction, PaymentDirection.OUTBOUND)
 self.assertEqual(sender_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(sender_payment.kind.is_spontaneous())

 self.assertEqual(receiver_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(receiver_payment.direction, PaymentDirection.INBOUND)
 self.assertEqual(receiver_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(receiver_payment.kind.is_spontaneous())

 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

 def test_channel_full_cycle(self):
 esplora_endpoint = get_esplora_endpoint()

 listening_addresses_2 = ["127.0.0.1:2324"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()
 ## Setup two nodes 
 node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
 print("Node ID 1:", node_id_1)
 print("Node ID 2:", node_id_2)

 # Check node-announcement features exposed through NodeStatus.
 for node in [node_1, node_2]:
 node_features_exposed(self, node.status().node_features)

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, 100000)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, 100000)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)

 mine_and_wait(esplora_endpoint, 6)
 fund_nodes(node_1, node_2, esplora_endpoint)

 node_1.sync_wallets()
 node_2.sync_wallets()

 spendable_balance_1 = node_1.list_balances().spendable_onchain_balance_sats
 spendable_balance_2 = node_2.list_balances().spendable_onchain_balance_sats
Expand All@@ -210,22 +283,9 @@ def test_channel_full_cycle(self):
 print("TOTAL 2:", total_balance_2)
 self.assertEqual(total_balance_2, 100000)

 node_1.open_channel(node_id_2, listening_addresses_2[0], 50000, None, None)


 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 channel_pending_event_2 = expect_event(node_2, Event.CHANNEL_PENDING)
 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_1, channel_ready_event_2, funding_txid = open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)
 print("funding_txo:", funding_txid)

 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)

 # Check negotiated init features exposed through ChannelDetails.
 for channel in [node_1.list_channels()[0], node_2.list_channels()[0]]:
Expand DownExpand Up@@ -259,13 +319,7 @@ def test_channel_full_cycle(self):
 self.assertEqual(spendable_balance_after_close_2, 102500)

 # Stop nodes
 node_1.stop()
 node_2.stop()

 # Cleanup
 time.sleep(1) # Wait a sec so our logs can finish writing
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()
 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

if __name__ == '__main__':
 unittest.main()
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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 Merged

tnull
merged 2 commits into

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Jun 24, 2026
 Merged


Add python integration test for spontaneous keysend payments
#923
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7fa8d0f

Extract shared setup helpers in Python binding tests


heyolaniran Jun 15, 2026
b318ccd

Add spontaneous payment Python binding test


heyolaniran Jun 15, 2026

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154 changes: 104 additions & 50 deletions
bindings/python/src/ldk_node/test_ldk_node.py

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Original file line numberDiff line numberDiff line change
Expand Up@@ -5,6 +5,7 @@
import os
import re
import requests
import socket

from ldk_node import *

Expand DownExpand Up@@ -118,8 +119,68 @@ def expect_event(node, expected_event_type):
 assert isinstance(event, expected_event_type)
 print("EVENT:", event)
 node.event_handled()
 return event 

 return event

def find_two_free_ports():
 with socket.socket() as s1, socket.socket() as s2:
 s1.bind(("127.0.0.1", 0))
 s2.bind(("127.0.0.1",0))
 port_1 = s1.getsockname()[1]
 port_2 = s2.getsockname()[1]
 return port_1, port_2

def setup_two_nodes(esplora_endpoint):
 port_1, port_2 = find_two_free_ports()
 tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
 listening_addresses_1 = [f"127.0.0.1:{port_1}"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()

 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 listening_addresses_2 = [f"127.0.0.1:{port_2}"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()

 return node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2

def fund_nodes(node_1, node_2, esplora_endpoint, amount_sats=100000):
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 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, amount_sats)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, amount_sats)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

def open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_address_2, esplora_endpoint, channel_amount_sats=50000):
 node_1.open_channel(node_id_2, listening_address_2, channel_amount_sats, None, None)

 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 expect_event(node_2, Event.CHANNEL_PENDING)

 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)
 return channel_ready_event_1, channel_ready_event_2, funding_txid

def stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2):
 node_1.stop()
 node_2.stop()
 time.sleep(1)
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()

def assert_feature_helpers_return_bool(test_case, features):
 feature_methods = [
Expand DownExpand Up@@ -153,45 +214,57 @@ def setUp(self):
 esplora_endpoint = get_esplora_endpoint()
 mine_and_wait(esplora_endpoint, 1)

 def test_channel_full_cycle(self):
 def test_spontaneous_payment(self):
 """Spontaneous payment test in python: keysend after channel ready."""
 esplora_endpoint = get_esplora_endpoint()

## Setup Node 1
tmp_dir_1 = tempfile.TemporaryDirectory("_ldk_node_1")
print("TMP DIR 1:", tmp_dir_1.name)
node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
fund_nodes(node_1, node_2, esplora_endpoint)
open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)

 listening_addresses_1 = ["127.0.0.1:2323"]
 node_1 = setup_node(tmp_dir_1.name, esplora_endpoint, listening_addresses_1)
 node_1.start()
 node_id_1 = node_1.node_id()
 print("Node ID 1:", node_id_1)
 keysend_amount_msat = 2_500_000
 custom_tlvs = [CustomTlvRecord(type_num=13377331, value=bytes([1, 2, 3]))]
 keysend_payment_id = node_1.spontaneous_payment().send_with_custom_tlvs(
 keysend_amount_msat, node_id_2, None, custom_tlvs
 )

 expect_event(node_1, Event.PAYMENT_SUCCESSFUL)
 received_event = expect_event(node_2, Event.PAYMENT_RECEIVED)

 self.assertEqual(received_event.amount_msat, keysend_amount_msat)
 self.assertEqual(received_event.custom_records, custom_tlvs)

 # Setup Node 2
 tmp_dir_2 = tempfile.TemporaryDirectory("_ldk_node_2")
 print("TMP DIR 2:", tmp_dir_2.name)
 sender_payment = node_1.payment(keysend_payment_id)
 receiver_payment = node_2.payment(keysend_payment_id)

 self.assertIsNotNone(sender_payment)
 self.assertIsNotNone(receiver_payment)
 self.assertEqual(sender_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(sender_payment.direction, PaymentDirection.OUTBOUND)
 self.assertEqual(sender_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(sender_payment.kind.is_spontaneous())

 self.assertEqual(receiver_payment.status, PaymentStatus.SUCCEEDED)
 self.assertEqual(receiver_payment.direction, PaymentDirection.INBOUND)
 self.assertEqual(receiver_payment.amount_msat, keysend_amount_msat)
 self.assertTrue(receiver_payment.kind.is_spontaneous())

 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

 def test_channel_full_cycle(self):
 esplora_endpoint = get_esplora_endpoint()

 listening_addresses_2 = ["127.0.0.1:2324"]
 node_2 = setup_node(tmp_dir_2.name, esplora_endpoint, listening_addresses_2)
 node_2.start()
 node_id_2 = node_2.node_id()
 ## Setup two nodes 
 node_1, node_2, tmp_dir_1, tmp_dir_2, node_id_1, node_id_2, listening_addresses_2 = setup_two_nodes(esplora_endpoint)
 print("Node ID 1:", node_id_1)
 print("Node ID 2:", node_id_2)

 # Check node-announcement features exposed through NodeStatus.
 for node in [node_1, node_2]:
 node_features_exposed(self, node.status().node_features)

 address_1 = node_1.onchain_payment().new_address()
 txid_1 = send_to_address(address_1, 100000)
 address_2 = node_2.onchain_payment().new_address()
 txid_2 = send_to_address(address_2, 100000)

 wait_for_tx(esplora_endpoint, txid_1)
 wait_for_tx(esplora_endpoint, txid_2)

 mine_and_wait(esplora_endpoint, 6)
 fund_nodes(node_1, node_2, esplora_endpoint)

 node_1.sync_wallets()
 node_2.sync_wallets()

 spendable_balance_1 = node_1.list_balances().spendable_onchain_balance_sats
 spendable_balance_2 = node_2.list_balances().spendable_onchain_balance_sats
Expand All@@ -210,22 +283,9 @@ def test_channel_full_cycle(self):
 print("TOTAL 2:", total_balance_2)
 self.assertEqual(total_balance_2, 100000)

 node_1.open_channel(node_id_2, listening_addresses_2[0], 50000, None, None)


 channel_pending_event_1 = expect_event(node_1, Event.CHANNEL_PENDING)
 channel_pending_event_2 = expect_event(node_2, Event.CHANNEL_PENDING)
 funding_txid = channel_pending_event_1.funding_txo.txid
 wait_for_tx(esplora_endpoint, funding_txid)
 mine_and_wait(esplora_endpoint, 6)

 node_1.sync_wallets()
 node_2.sync_wallets()

 channel_ready_event_1 = expect_event(node_1, Event.CHANNEL_READY)
 channel_ready_event_1, channel_ready_event_2, funding_txid = open_channel_and_wait_ready(node_1, node_2, node_id_2, listening_addresses_2[0], esplora_endpoint)
 print("funding_txo:", funding_txid)

 channel_ready_event_2 = expect_event(node_2, Event.CHANNEL_READY)

 # Check negotiated init features exposed through ChannelDetails.
 for channel in [node_1.list_channels()[0], node_2.list_channels()[0]]:
Expand DownExpand Up@@ -259,13 +319,7 @@ def test_channel_full_cycle(self):
 self.assertEqual(spendable_balance_after_close_2, 102500)

 # Stop nodes
 node_1.stop()
 node_2.stop()

 # Cleanup
 time.sleep(1) # Wait a sec so our logs can finish writing
 tmp_dir_1.cleanup()
 tmp_dir_2.cleanup()
 stop_and_cleanup(node_1, node_2, tmp_dir_1, tmp_dir_2)

if __name__ == '__main__':
 unittest.main()
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