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wallet_simulaterawtx.py
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#!/usr/bin/env python3
# Copyright (c) 2021-2022 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 simulaterawtransaction.
"""
from decimal import Decimal
from test_framework.blocktools import COINBASE_MATURITY
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_approx,
assert_equal,
assert_raises_rpc_error,
)
class SimulateTxTest(BitcoinTestFramework):
def add_options(self, parser):
self.add_wallet_options(parser)
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 1
def skip_test_if_missing_module(self):
self.skip_if_no_wallet()
def setup_network(self, split=False):
self.setup_nodes()
def run_test(self):
node = self.nodes[0]
self.generate(node, 1, sync_fun=self.no_op) # Leave IBD
node.createwallet(wallet_name='w0')
node.createwallet(wallet_name='w1')
node.createwallet(wallet_name='w2', disable_private_keys=True)
w0 = node.get_wallet_rpc('w0')
w1 = node.get_wallet_rpc('w1')
w2 = node.get_wallet_rpc('w2')
self.generatetoaddress(node, COINBASE_MATURITY + 1, w0.getnewaddress())
assert_equal(w0.getbalance(), 50.0)
assert_equal(w1.getbalance(), 0.0)
address1 = w1.getnewaddress()
address2 = w1.getnewaddress()
# Add address1 as watch-only to w2
w2.importpubkey(pubkey=w1.getaddressinfo(address1)["pubkey"])
tx1 = node.createrawtransaction([], [{address1: 5.0}])
tx2 = node.createrawtransaction([], [{address2: 10.0}])
# w0 should be unaffected, w2 should see +5 for tx1
assert_equal(w0.simulaterawtransaction([tx1])["balance_change"], 0.0)
assert_equal(w2.simulaterawtransaction([tx1])["balance_change"], 5.0)
# w1 should see +5 balance for tx1
assert_equal(w1.simulaterawtransaction([tx1])["balance_change"], 5.0)
# w0 should be unaffected, w2 should see +5 for both transactions
assert_equal(w0.simulaterawtransaction([tx1, tx2])["balance_change"], 0.0)
assert_equal(w2.simulaterawtransaction([tx1, tx2])["balance_change"], 5.0)
# w1 should see +15 balance for both transactions
assert_equal(w1.simulaterawtransaction([tx1, tx2])["balance_change"], 15.0)
# w0 funds transaction; it should now see a decrease in (tx fee and payment), and w1 should see the same as above
funding = w0.fundrawtransaction(tx1)
tx1 = funding["hex"]
tx1changepos = funding["changepos"]
bitcoin_fee = Decimal(funding["fee"])
# w0 sees fee + 5 btc decrease, w2 sees + 5 btc
assert_approx(w0.simulaterawtransaction([tx1])["balance_change"], -(Decimal("5") + bitcoin_fee))
assert_approx(w2.simulaterawtransaction([tx1])["balance_change"], Decimal("5"))
# w1 sees same as before
assert_equal(w1.simulaterawtransaction([tx1])["balance_change"], 5.0)
# same inputs (tx) more than once should error
assert_raises_rpc_error(-8, "Transaction(s) are spending the same output more than once", w0.simulaterawtransaction, [tx1,tx1])
tx1ob = node.decoderawtransaction(tx1)
tx1hex = tx1ob["txid"]
tx1vout = 1 - tx1changepos
# tx3 spends new w1 UTXO paying to w0
tx3 = node.createrawtransaction([{"txid": tx1hex, "vout": tx1vout}], {w0.getnewaddress(): 4.9999})
# tx4 spends new w1 UTXO paying to w1
tx4 = node.createrawtransaction([{"txid": tx1hex, "vout": tx1vout}], {w1.getnewaddress(): 4.9999})
# on their own, both should fail due to missing input(s)
assert_raises_rpc_error(-8, "One or more transaction inputs are missing or have been spent already", w0.simulaterawtransaction, [tx3])
assert_raises_rpc_error(-8, "One or more transaction inputs are missing or have been spent already", w1.simulaterawtransaction, [tx3])
assert_raises_rpc_error(-8, "One or more transaction inputs are missing or have been spent already", w0.simulaterawtransaction, [tx4])
assert_raises_rpc_error(-8, "One or more transaction inputs are missing or have been spent already", w1.simulaterawtransaction, [tx4])
# they should succeed when including tx1:
# wallet tx3 tx4
# w0 -5 - bitcoin_fee + 4.9999 -5 - bitcoin_fee
# w1 0 +4.9999
assert_approx(w0.simulaterawtransaction([tx1, tx3])["balance_change"], -Decimal("5") - bitcoin_fee + Decimal("4.9999"))
assert_approx(w1.simulaterawtransaction([tx1, tx3])["balance_change"], 0)
assert_approx(w0.simulaterawtransaction([tx1, tx4])["balance_change"], -Decimal("5") - bitcoin_fee)
assert_approx(w1.simulaterawtransaction([tx1, tx4])["balance_change"], Decimal("4.9999"))
# they should fail if attempting to include both tx3 and tx4
assert_raises_rpc_error(-8, "Transaction(s) are spending the same output more than once", w0.simulaterawtransaction, [tx1, tx3, tx4])
assert_raises_rpc_error(-8, "Transaction(s) are spending the same output more than once", w1.simulaterawtransaction, [tx1, tx3, tx4])
# send tx1 to avoid reusing same UTXO below
node.sendrawtransaction(w0.signrawtransactionwithwallet(tx1)["hex"])
self.generate(node, 1, sync_fun=self.no_op) # Confirm tx to trigger error below
self.sync_all()
# w0 funds transaction 2; it should now see a decrease in (tx fee and payment), and w1 should see the same as above
funding = w0.fundrawtransaction(tx2)
tx2 = funding["hex"]
bitcoin_fee2 = Decimal(funding["fee"])
assert_approx(w0.simulaterawtransaction([tx2])["balance_change"], -(Decimal("10") + bitcoin_fee2))
assert_approx(w1.simulaterawtransaction([tx2])["balance_change"], +(Decimal("10")))
assert_approx(w2.simulaterawtransaction([tx2])["balance_change"], 0)
# w0-w2 error due to tx1 already being mined
assert_raises_rpc_error(-8, "One or more transaction inputs are missing or have been spent already", w0.simulaterawtransaction, [tx1, tx2])
assert_raises_rpc_error(-8, "One or more transaction inputs are missing or have been spent already", w1.simulaterawtransaction, [tx1, tx2])
assert_raises_rpc_error(-8, "One or more transaction inputs are missing or have been spent already", w2.simulaterawtransaction, [tx1, tx2])
if __name__ == '__main__':
SimulateTxTest(__file__).main()