1 #!/usr/bin/env python3
2 # Copyright (c) 2014-2022 The Limenka developers
3 # Distributed under the MIT software license, see the accompanying
4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 """Test descendant package tracking carve-out allowing one final transaction in
6 an otherwise-full package as long as it has only one parent and is <= 10k in
7 size.
8 """
9 10 from test_framework.messages import (
11 DEFAULT_ANCESTOR_LIMIT,
12 )
13 from test_framework.test_framework import LimenkaTestFramework
14 from test_framework.util import (
15 assert_equal,
16 assert_raises_rpc_error,
17 )
18 from test_framework.wallet import MiniWallet
19 20 21 class MempoolPackagesTest(LimenkaTestFramework):
22 def set_test_params(self):
23 self.num_nodes = 1
24 25 def chain_tx(self, utxos_to_spend, *, num_outputs=1):
26 return self.wallet.send_self_transfer_multi(
27 from_node=self.nodes[0],
28 utxos_to_spend=utxos_to_spend,
29 num_outputs=num_outputs)['new_utxos']
30 31 def run_test(self):
32 self.wallet = MiniWallet(self.nodes[0])
33 34 # DEFAULT_ANCESTOR_LIMIT transactions off a confirmed tx should be fine
35 chain = []
36 utxo = self.wallet.get_utxo()
37 for _ in range(4):
38 utxo, utxo2 = self.chain_tx([utxo], num_outputs=2)
39 chain.append(utxo2)
40 for _ in range(DEFAULT_ANCESTOR_LIMIT - 4):
41 utxo, = self.chain_tx([utxo])
42 chain.append(utxo)
43 second_chain, = self.chain_tx([self.wallet.get_utxo(confirmed_only=True)])
44 45 # Check mempool has DEFAULT_ANCESTOR_LIMIT + 1 transactions in it
46 assert_equal(len(self.nodes[0].getrawmempool()), DEFAULT_ANCESTOR_LIMIT + 1)
47 48 # Adding one more transaction on to the chain should fail.
49 assert_raises_rpc_error(-26, "too-long-mempool-chain, too many unconfirmed ancestors [limit: 25]", self.chain_tx, [utxo])
50 # ... or if it chains on from some point in the middle of the chain.
51 assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_tx, [chain[2]])
52 assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_tx, [chain[1]])
53 # ...even if it chains on to two parent transactions with one in the chain.
54 assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_tx, [chain[0], second_chain])
55 # ...especially if its > 40k weight
56 assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_tx, [chain[0]], num_outputs=350)
57 # ...even if it's submitted with other transactions
58 replaceable_tx = self.wallet.create_self_transfer_multi(utxos_to_spend=[chain[0]])
59 txns = [replaceable_tx["tx"], self.wallet.create_self_transfer_multi(utxos_to_spend=replaceable_tx["new_utxos"])["tx"]]
60 txns_hex = [tx.serialize().hex() for tx in txns]
61 assert_equal(self.nodes[0].testmempoolaccept(txns_hex)[0]["reject-reason"], "too-long-mempool-chain")
62 pkg_result = self.nodes[0].submitpackage(txns_hex)
63 assert "too-long-mempool-chain" in pkg_result["tx-results"][txns[0].getwtxid()]["error"]
64 assert_equal(pkg_result["tx-results"][txns[1].getwtxid()]["error"], "bad-txns-inputs-missingorspent")
65 # But not if it chains directly off the first transaction
66 self.nodes[0].sendrawtransaction(replaceable_tx["hex"])
67 # and the second chain should work just fine
68 self.chain_tx([second_chain])
69 70 # Ensure an individual transaction with single direct conflict can RBF the chain which used our carve-out rule
71 replacement_tx = replaceable_tx["tx"]
72 replacement_tx.vout[0].nValue -= 1000000
73 self.nodes[0].sendrawtransaction(replacement_tx.serialize().hex())
74 75 # Finally, check that we added two transactions
76 assert_equal(len(self.nodes[0].getrawmempool()), DEFAULT_ANCESTOR_LIMIT + 3)
77 78 79 if __name__ == '__main__':
80 MempoolPackagesTest(__file__).main()
81