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-rwxr-xr-xtest/functional/p2p_1p1c_network.py165
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diff --git a/test/functional/p2p_1p1c_network.py b/test/functional/p2p_1p1c_network.py
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+++ b/test/functional/p2p_1p1c_network.py
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+#!/usr/bin/env python3
+# Copyright (c) 2024-present The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""
+Test that 1p1c package submission allows a 1p1c package to propagate in a "network" of nodes. Send
+various packages from different nodes on a network in which some nodes have already received some of
+the transactions (and submitted them to mempool, kept them as orphans or rejected them as
+too-low-feerate transactions). The packages should be received and accepted by all nodes.
+"""
+
+from decimal import Decimal
+from math import ceil
+
+from test_framework.messages import (
+ msg_tx,
+)
+from test_framework.p2p import (
+ P2PInterface,
+)
+from test_framework.test_framework import BitcoinTestFramework
+from test_framework.util import (
+ assert_equal,
+ assert_greater_than,
+ fill_mempool,
+)
+from test_framework.wallet import (
+ MiniWallet,
+ MiniWalletMode,
+)
+
+# 1sat/vB feerate denominated in BTC/KvB
+FEERATE_1SAT_VB = Decimal("0.00001000")
+
+class PackageRelayTest(BitcoinTestFramework):
+ def set_test_params(self):
+ self.setup_clean_chain = True
+ self.num_nodes = 4
+ # hugely speeds up the test, as it involves multiple hops of tx relay.
+ self.noban_tx_relay = True
+ self.extra_args = [[
+ "-datacarriersize=100000",
+ "-maxmempool=5",
+ ]] * self.num_nodes
+ self.supports_cli = False
+
+ def raise_network_minfee(self):
+ filler_wallet = MiniWallet(self.nodes[0])
+ fill_mempool(self, self.nodes[0], filler_wallet)
+
+ self.log.debug("Wait for the network to sync mempools")
+ self.sync_mempools()
+
+ self.log.debug("Check that all nodes' mempool minimum feerates are above min relay feerate")
+ for node in self.nodes:
+ assert_equal(node.getmempoolinfo()['minrelaytxfee'], FEERATE_1SAT_VB)
+ assert_greater_than(node.getmempoolinfo()['mempoolminfee'], FEERATE_1SAT_VB)
+
+ def create_basic_1p1c(self, wallet):
+ low_fee_parent = wallet.create_self_transfer(fee_rate=FEERATE_1SAT_VB, confirmed_only=True)
+ high_fee_child = wallet.create_self_transfer(utxo_to_spend=low_fee_parent["new_utxo"], fee_rate=999*FEERATE_1SAT_VB)
+ package_hex_basic = [low_fee_parent["hex"], high_fee_child["hex"]]
+ return package_hex_basic, low_fee_parent["tx"], high_fee_child["tx"]
+
+ def create_package_2outs(self, wallet):
+ # First create a tester tx to see the vsize, and then adjust the fees
+ utxo_for_2outs = wallet.get_utxo(confirmed_only=True)
+
+ low_fee_parent_2outs_tester = wallet.create_self_transfer_multi(
+ utxos_to_spend=[utxo_for_2outs],
+ num_outputs=2,
+ )
+
+ # Target 1sat/vB so the number of satoshis is equal to the vsize.
+ # Round up. The goal is to be between min relay feerate and mempool min feerate.
+ fee_2outs = ceil(low_fee_parent_2outs_tester["tx"].get_vsize() / 2)
+
+ low_fee_parent_2outs = wallet.create_self_transfer_multi(
+ utxos_to_spend=[utxo_for_2outs],
+ num_outputs=2,
+ fee_per_output=fee_2outs,
+ )
+
+ # Now create the child
+ high_fee_child_2outs = wallet.create_self_transfer_multi(
+ utxos_to_spend=low_fee_parent_2outs["new_utxos"][::-1],
+ fee_per_output=fee_2outs*100,
+ )
+ return [low_fee_parent_2outs["hex"], high_fee_child_2outs["hex"]], low_fee_parent_2outs["tx"], high_fee_child_2outs["tx"]
+
+ def create_package_2p1c(self, wallet):
+ parent1 = wallet.create_self_transfer(fee_rate=FEERATE_1SAT_VB*10, confirmed_only=True)
+ parent2 = wallet.create_self_transfer(fee_rate=FEERATE_1SAT_VB*20, confirmed_only=True)
+ child = wallet.create_self_transfer_multi(
+ utxos_to_spend=[parent1["new_utxo"], parent2["new_utxo"]],
+ fee_per_output=999*parent1["tx"].get_vsize(),
+ )
+ return [parent1["hex"], parent2["hex"], child["hex"]], parent1["tx"], parent2["tx"], child["tx"]
+
+ def create_packages(self):
+ # 1: Basic 1-parent-1-child package, parent 1sat/vB, child 999sat/vB
+ package_hex_1, parent_1, child_1 = self.create_basic_1p1c(self.wallet)
+
+ # 2: same as 1, parent's txid is the same as its wtxid.
+ package_hex_2, parent_2, child_2 = self.create_basic_1p1c(self.wallet_nonsegwit)
+
+ # 3: 2-parent-1-child package. Both parents are above mempool min feerate. No package submission happens.
+ # We require packages to be child-with-unconfirmed-parents and only allow 1-parent-1-child packages.
+ package_hex_3, parent_31, parent_32, child_3 = self.create_package_2p1c(self.wallet)
+
+ # 4: parent + child package where the child spends 2 different outputs from the parent.
+ package_hex_4, parent_4, child_4 = self.create_package_2outs(self.wallet)
+
+ # Assemble return results
+ packages_to_submit = [package_hex_1, package_hex_2, package_hex_3, package_hex_4]
+ # node0: sender
+ # node1: pre-received the children (orphan)
+ # node3: pre-received the parents (too low fee)
+ # All nodes receive parent_31 ahead of time.
+ txns_to_send = [
+ [],
+ [child_1, child_2, parent_31, child_3, child_4],
+ [parent_31],
+ [parent_1, parent_2, parent_31, parent_4]
+ ]
+
+ return packages_to_submit, txns_to_send
+
+ def run_test(self):
+ self.wallet = MiniWallet(self.nodes[1])
+ self.wallet_nonsegwit = MiniWallet(self.nodes[2], mode=MiniWalletMode.RAW_P2PK)
+ self.generate(self.wallet_nonsegwit, 10)
+ self.generate(self.wallet, 120)
+
+ self.log.info("Fill mempools with large transactions to raise mempool minimum feerates")
+ self.raise_network_minfee()
+
+ # Create the transactions.
+ self.wallet.rescan_utxos(include_mempool=True)
+ packages_to_submit, transactions_to_presend = self.create_packages()
+
+ self.peers = [self.nodes[i].add_p2p_connection(P2PInterface()) for i in range(self.num_nodes)]
+
+ self.log.info("Pre-send some transactions to nodes")
+ for (i, peer) in enumerate(self.peers):
+ for tx in transactions_to_presend[i]:
+ peer.send_and_ping(msg_tx(tx))
+ # This disconnect removes any sent orphans from the orphanage (EraseForPeer) and times
+ # out the in-flight requests. It is currently required for the test to pass right now,
+ # because the node will not reconsider an orphan tx and will not (re)try requesting
+ # orphan parents from multiple peers if the first one didn't respond.
+ # TODO: remove this in the future if the node tries orphan resolution with multiple peers.
+ peer.peer_disconnect()
+
+ self.log.info("Submit full packages to node0")
+ for package_hex in packages_to_submit:
+ submitpackage_result = self.nodes[0].submitpackage(package_hex)
+ assert_equal(submitpackage_result["package_msg"], "success")
+
+ self.log.info("Wait for mempools to sync")
+ self.sync_mempools(timeout=20)
+
+
+if __name__ == '__main__':
+ PackageRelayTest().main()