functional test: Add new -dustrelayfee=0 test case

This test would catch regressions where ephemeral dust checks are being erroneously applied on outputs that are not actually dust.
zkLayer · Nov 12, 2024 · 04b2714 · 04b2714
1 parent 2b33322
commit 04b2714
Showing 1 changed file with 30 additions and 0 deletions.
diff --git a/test/functional/mempool_dust.py b/test/functional/mempool_dust.py
@@ -71,9  71,39 @@ def test_dust_output(self, node: TestNode, dust_relay_fee: Decimal,
         # 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)