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functional test: Add new -dustrelayfee=0 test case

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This test would catch regressions where ephemeral
dust checks are being erroneously applied on outputs
that are not actually dust.
This commit is contained in:
Greg Sanders 2024-09-13 10:27:15 -04:00
parent 2b33322169
commit 04b2714fbb
1 changed files with 30 additions and 0 deletions
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30
test/functional/mempool_dust.py
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@ -71,9 +71,39 @@ class DustRelayFeeTest(BitcoinTestFramework):
# finally send the transaction to avoid running out of MiniWallet UTXOs
self.wallet.sendrawtransaction(from_node=node, tx_hex=tx_good_hex)
def test_dustrelay(self):
self.log.info("Test that small outputs are acceptable when dust relay rate is set to 0 that would otherwise trigger ephemeral dust rules")
self.restart_node(0, extra_args=["-dustrelayfee=0"])
assert_equal(self.nodes[0].getrawmempool(), [])
# Double dust, both unspent, with fees. Would have failed individual checks.
# Dust is 1 satoshi create_self_transfer_multi disallows 0
dusty_tx = self.wallet.create_self_transfer_multi(fee_per_output=1000, amount_per_output=1, num_outputs=2)
dust_txid = self.nodes[0].sendrawtransaction(hexstring=dusty_tx["hex"], maxfeerate=0)
assert_equal(self.nodes[0].getrawmempool(), [dust_txid])
# Spends one dust along with fee input, leave other dust unspent to check ephemeral dust checks aren't being enforced
sweep_tx = self.wallet.create_self_transfer_multi(utxos_to_spend=[self.wallet.get_utxo(), dusty_tx["new_utxos"][0]])
sweep_txid = self.nodes[0].sendrawtransaction(sweep_tx["hex"])
mempool_entries = self.nodes[0].getrawmempool()
assert dust_txid in mempool_entries
assert sweep_txid in mempool_entries
assert_equal(len(mempool_entries), 2)
# Wipe extra arg to reset dust relay
self.restart_node(0, extra_args=[])
assert_equal(self.nodes[0].getrawmempool(), [])
def run_test(self):
self.wallet = MiniWallet(self.nodes[0])
self.test_dustrelay()
# prepare output scripts of each standard type
_, uncompressed_pubkey = generate_keypair(compressed=False)
_, pubkey = generate_keypair(compressed=True)