elements/test/functional/wallet_send_zero_fee.py
2025-07-25 15:03:22 +02:00

60 lines
2.5 KiB
Python
Executable file

#!/usr/bin/env python3
# Copyright (c) 2017-2020 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
from decimal import Decimal
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
)
class WalletTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 3
self.extra_args = [[
"-blindedaddresses=1",
"-minrelaytxfee=0",
"-blockmintxfee=0",
"-mintxfee=0",
]] * self.num_nodes
def skip_test_if_missing_module(self):
self.skip_if_no_wallet()
def run_test(self):
# initial state when setup_clean_chain is False
assert_equal(self.nodes[0].getbalance(), {'bitcoin': Decimal('1250')})
assert_equal(self.nodes[1].getbalance(), {'bitcoin': Decimal('1250')})
assert_equal(self.nodes[2].getbalance(), {'bitcoin': Decimal('1250')})
assert_equal(self.nodes[0].getblockchaininfo()["blocks"], 200)
self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 10)
self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 20)
self.generate(self.nodes[0], 1)
assert_equal(self.nodes[0].getblockchaininfo()["blocks"], 201)
assert_equal(self.nodes[0].getbalance(), {'bitcoin': Decimal('1269.99897200')})
assert_equal(self.nodes[1].getbalance(), {'bitcoin': Decimal('1260')})
assert_equal(self.nodes[2].getbalance(), {'bitcoin': Decimal('1270')})
# send a zero fee_rate transaction, which should not add a fee output
addr = self.nodes[1].getnewaddress()
txid = self.nodes[0].sendtoaddress(address=addr, amount=1, fee_rate=0)
tx = self.nodes[0].getrawtransaction(txid, 2)
# there should be no fees
assert "bitcoin" not in tx["fee"]
assert_equal(tx["fee"], {})
# and no fee output
assert_equal(len(tx["vout"]),2)
for output in tx["vout"]:
assert output["scriptPubKey"]["type"] != "fee"
self.generate(self.nodes[0], 1)
assert_equal(self.nodes[0].getblockchaininfo()["blocks"], 202)
assert_equal(self.nodes[0].getbalance(), {'bitcoin': Decimal('1318.99897200')})
assert_equal(self.nodes[1].getbalance(), {'bitcoin': Decimal('1261')})
assert_equal(self.nodes[2].getbalance(), {'bitcoin': Decimal('1270')})
if __name__ == '__main__':
WalletTest().main()