#!/usr/bin/env python3
# Copyright (c) 2014-2022 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 the fundrawtransaction RPC."""
from decimal import Decimal
from itertools import product
from math import ceil
from test_framework.address import address_to_scriptpubkey
from test_framework.descriptors import descsum_create
from test_framework.messages import (
COIN,
CTransaction,
CTxOut,
)
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_approx,
assert_equal,
assert_fee_amount,
assert_greater_than,
assert_greater_than_or_equal,
assert_raises_rpc_error,
count_bytes,
get_fee,
)
from test_framework.wallet_util import generate_keypair, WalletUnlock
ERR_NOT_ENOUGH_PRESET_INPUTS = "The preselected coins total amount does not cover the transaction target. " \
"Please allow other inputs to be automatically selected or include more coins manually"
def get_unspent(listunspent, amount):
for utx in listunspent:
if utx['amount'] == amount:
return utx
raise AssertionError('Could not find unspent with amount={}'.format(amount))
class RawTransactionsTest(BitcoinTestFramework):
def add_options(self, parser):
self.add_wallet_options(parser)
def set_test_params(self):
self.num_nodes = 4
self.setup_clean_chain = True
# whitelist peers to speed up tx relay / mempool sync
self.noban_tx_relay = True
self.rpc_timeout = 90 # to prevent timeouts in `test_transaction_too_large`
def skip_test_if_missing_module(self):
self.skip_if_no_wallet()
def setup_network(self):
self.setup_nodes()
self.connect_nodes(0, 1)
self.connect_nodes(1, 2)
self.connect_nodes(0, 2)
self.connect_nodes(0, 3)
def lock_outputs_type(self, wallet, outputtype):
"""
Only allow UTXOs of the given type
"""
if outputtype in ["legacy", "p2pkh", "pkh"]:
prefixes = ["pkh(", "sh(multi("]
elif outputtype in ["p2sh-segwit", "sh_wpkh"]:
prefixes = ["sh(wpkh(", "sh(wsh("]
elif outputtype in ["bech32", "wpkh"]:
prefixes = ["wpkh(", "wsh("]
else:
assert False, f"Unknown output type {outputtype}"
to_lock = []
for utxo in wallet.listunspent():
if "desc" in utxo:
for prefix in prefixes:
if utxo["desc"].startswith(prefix):
to_lock.append({"txid": utxo["txid"], "vout": utxo["vout"]})
wallet.lockunspent(False, to_lock)
def unlock_utxos(self, wallet):
"""
Unlock all UTXOs except the watchonly one
"""
to_keep = []
if self.watchonly_utxo is not None:
to_keep.append(self.watchonly_utxo)
wallet.lockunspent(True)
wallet.lockunspent(False, to_keep)
def run_test(self):
self.watchonly_utxo = None
self.log.info("Connect nodes, set fees, generate blocks, and sync")
self.min_relay_tx_fee = self.nodes[0].getnetworkinfo()['relayfee']
# This test is not meant to test fee estimation and we'd like
# to be sure all txs are sent at a consistent desired feerate
for node in self.nodes:
node.settxfee(self.min_relay_tx_fee)
# if the fee's positive delta is higher than this value tests will fail,
# neg. delta always fail the tests.
# The size of the signature of every input may be at most 2 bytes larger
# than a minimum sized signature.
# = 2 bytes * minRelayTxFeePerByte
self.fee_tolerance = 2 * self.min_relay_tx_fee / 1000
self.generate(self.nodes[2], 1)
self.generate(self.nodes[0], 121)
self.test_add_inputs_default_value()
self.test_preset_inputs_selection()
self.test_weight_calculation()
self.test_weight_limits()
self.test_change_position()
self.test_simple()
self.test_simple_two_coins()
self.test_simple_two_outputs()
self.test_change()
self.test_no_change()
self.test_invalid_option()
self.test_invalid_change_address()
self.test_valid_change_address()
self.test_change_type()
self.test_coin_selection()
self.test_two_vin()
self.test_two_vin_two_vout()
self.test_invalid_input()
self.test_fee_p2pkh()
self.test_fee_p2pkh_multi_out()
self.test_fee_p2sh()
self.test_fee_4of5()
self.test_spend_2of2()
self.test_locked_wallet()
self.test_many_inputs_fee()
self.test_many_inputs_send()
self.test_op_return()
self.test_watchonly()
self.test_all_watched_funds()
self.test_option_feerate()
self.test_address_reuse()
self.test_option_subtract_fee_from_outputs()
self.test_subtract_fee_with_presets()
self.test_transaction_too_large()
self.test_include_unsafe()
self.test_external_inputs()
self.test_22670()
self.test_feerate_rounding()
self.test_input_confs_control()
self.test_duplicate_outputs()
def test_duplicate_outputs(self):
self.log.info("Test deserializing and funding a transaction with duplicate outputs")
self.nodes[1].createwallet("fundtx_duplicate_outputs")
w = self.nodes[1].get_wallet_rpc("fundtx_duplicate_outputs")
addr = w.getnewaddress(address_type="bech32")
self.nodes[0].sendtoaddress(addr, 5)
self.generate(self.nodes[0], 1)
address = self.nodes[0].getnewaddress("bech32")
tx = CTransaction()
tx.vin = []
tx.vout = [CTxOut(1 * COIN, bytearray(address_to_scriptpubkey(address)))] * 2
tx.nLockTime = 0
tx_hex = tx.serialize().hex()
res = w.fundrawtransaction(tx_hex, add_inputs=True)
signed_res = w.signrawtransactionwithwallet(res["hex"])
txid = w.sendrawtransaction(signed_res["hex"])
assert self.nodes[1].getrawtransaction(txid)
self.log.info("Test SFFO with duplicate outputs")
res_sffo = w.fundrawtransaction(tx_hex, add_inputs=True, subtractFeeFromOutputs=[0,1])
signed_res_sffo = w.signrawtransactionwithwallet(res_sffo["hex"])
txid_sffo = w.sendrawtransaction(signed_res_sffo["hex"])
assert self.nodes[1].getrawtransaction(txid_sffo)
def test_change_position(self):
"""Ensure setting changePosition in fundraw with an exact match is handled properly."""
self.log.info("Test fundrawtxn changePosition option")
rawmatch = self.nodes[2].createrawtransaction([], {self.nodes[2].getnewaddress():50})
rawmatch = self.nodes[2].fundrawtransaction(rawmatch, changePosition=1, subtractFeeFromOutputs=[0])
assert_equal(rawmatch["changepos"], -1)
self.nodes[3].createwallet(wallet_name="wwatch", disable_private_keys=True)
wwatch = self.nodes[3].get_wallet_rpc('wwatch')
watchonly_address = self.nodes[0].getnewaddress()
watchonly_pubkey = self.nodes[0].getaddressinfo(watchonly_address)["pubkey"]
self.watchonly_amount = Decimal(200)
wwatch.importpubkey(watchonly_pubkey, "", True)
self.watchonly_utxo = self.create_outpoints(self.nodes[0], outputs=[{watchonly_address: self.watchonly_amount}])[0]
# Lock UTXO so nodes[0] doesn't accidentally spend it
self.nodes[0].lockunspent(False, [self.watchonly_utxo])
self.nodes[0].sendtoaddress(self.nodes[3].get_wallet_rpc(self.default_wallet_name).getnewaddress(), self.watchonly_amount / 10)
self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 1.5)
self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 1.0)
self.nodes[0].sendtoaddress(self.nodes[2].getnewaddress(), 5.0)
self.generate(self.nodes[0], 1)
wwatch.unloadwallet()
def test_simple(self):
self.log.info("Test fundrawtxn")
inputs = [ ]
outputs = { self.nodes[0].getnewaddress() : 1.0 }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
assert len(dec_tx['vin']) > 0 #test that we have enough inputs
def test_simple_two_coins(self):
self.log.info("Test fundrawtxn with 2 coins")
inputs = [ ]
outputs = { self.nodes[0].getnewaddress() : 2.2 }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
assert len(dec_tx['vin']) > 0 #test if we have enough inputs
assert_equal(dec_tx['vin'][0]['scriptSig']['hex'], '')
def test_simple_two_outputs(self):
self.log.info("Test fundrawtxn with 2 outputs")
inputs = [ ]
outputs = { self.nodes[0].getnewaddress() : 2.6, self.nodes[1].getnewaddress() : 2.5 }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
assert len(dec_tx['vin']) > 0
assert_equal(dec_tx['vin'][0]['scriptSig']['hex'], '')
def test_change(self):
self.log.info("Test fundrawtxn with a vin > required amount")
utx = get_unspent(self.nodes[2].listunspent(), 5)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']}]
outputs = { self.nodes[0].getnewaddress() : 1.0 }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
fee = rawtxfund['fee']
self.test_no_change_fee = fee # Use the same fee for the next tx
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
totalOut = 0
for out in dec_tx['vout']:
totalOut += out['value']
assert_equal(fee + totalOut, utx['amount']) #compare vin total and totalout+fee
def test_no_change(self):
self.log.info("Test fundrawtxn not having a change output")
utx = get_unspent(self.nodes[2].listunspent(), 5)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']}]
outputs = {self.nodes[0].getnewaddress(): Decimal(5.0) - self.test_no_change_fee - self.fee_tolerance}
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
fee = rawtxfund['fee']
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
totalOut = 0
for out in dec_tx['vout']:
totalOut += out['value']
assert_equal(rawtxfund['changepos'], -1)
assert_equal(fee + totalOut, utx['amount']) #compare vin total and totalout+fee
def test_invalid_option(self):
self.log.info("Test fundrawtxn with an invalid option")
utx = get_unspent(self.nodes[2].listunspent(), 5)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']} ]
outputs = { self.nodes[0].getnewaddress() : Decimal(4.0) }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
assert_raises_rpc_error(-8, "Unknown named parameter foo", self.nodes[2].fundrawtransaction, rawtx, foo='bar')
# reserveChangeKey was deprecated and is now removed
assert_raises_rpc_error(-8, "Unknown named parameter reserveChangeKey", lambda: self.nodes[2].fundrawtransaction(hexstring=rawtx, reserveChangeKey=True))
def test_invalid_change_address(self):
self.log.info("Test fundrawtxn with an invalid change address")
utx = get_unspent(self.nodes[2].listunspent(), 5)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']} ]
outputs = { self.nodes[0].getnewaddress() : Decimal(4.0) }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
assert_raises_rpc_error(-5, "Change address must be a valid bitcoin address", self.nodes[2].fundrawtransaction, rawtx, changeAddress='foobar')
def test_valid_change_address(self):
self.log.info("Test fundrawtxn with a provided change address")
utx = get_unspent(self.nodes[2].listunspent(), 5)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']} ]
outputs = { self.nodes[0].getnewaddress() : Decimal(4.0) }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
change = self.nodes[2].getnewaddress()
assert_raises_rpc_error(-8, "changePosition out of bounds", self.nodes[2].fundrawtransaction, rawtx, changeAddress=change, changePosition=2)
rawtxfund = self.nodes[2].fundrawtransaction(rawtx, changeAddress=change, changePosition=0)
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
out = dec_tx['vout'][0]
assert_equal(change, out['scriptPubKey']['address'])
def test_change_type(self):
self.log.info("Test fundrawtxn with a provided change type")
utx = get_unspent(self.nodes[2].listunspent(), 5)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']} ]
outputs = { self.nodes[0].getnewaddress() : Decimal(4.0) }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
assert_raises_rpc_error(-3, "JSON value of type null is not of expected type string", self.nodes[2].fundrawtransaction, rawtx, change_type=None)
assert_raises_rpc_error(-5, "Unknown change type ''", self.nodes[2].fundrawtransaction, rawtx, change_type='')
rawtx = self.nodes[2].fundrawtransaction(rawtx, change_type='bech32')
dec_tx = self.nodes[2].decoderawtransaction(rawtx['hex'])
assert_equal('witness_v0_keyhash', dec_tx['vout'][rawtx['changepos']]['scriptPubKey']['type'])
def test_coin_selection(self):
self.log.info("Test fundrawtxn with a vin < required amount")
utx = get_unspent(self.nodes[2].listunspent(), 1)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']}]
outputs = { self.nodes[0].getnewaddress() : 1.0 }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
# 4-byte version + 1-byte vin count + 36-byte prevout then script_len
rawtx = rawtx[:82] + "0100" + rawtx[84:]
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
assert_equal("00", dec_tx['vin'][0]['scriptSig']['hex'])
# Should fail without add_inputs:
assert_raises_rpc_error(-4, ERR_NOT_ENOUGH_PRESET_INPUTS, self.nodes[2].fundrawtransaction, rawtx, add_inputs=False)
# add_inputs is enabled by default
rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
matchingOuts = 0
for i, out in enumerate(dec_tx['vout']):
if out['scriptPubKey']['address'] in outputs:
matchingOuts+=1
else:
assert_equal(i, rawtxfund['changepos'])
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
assert_equal("00", dec_tx['vin'][0]['scriptSig']['hex'])
assert_equal(matchingOuts, 1)
assert_equal(len(dec_tx['vout']), 2)
def test_two_vin(self):
self.log.info("Test fundrawtxn with 2 vins")
utx = get_unspent(self.nodes[2].listunspent(), 1)
utx2 = get_unspent(self.nodes[2].listunspent(), 5)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']},{'txid' : utx2['txid'], 'vout' : utx2['vout']} ]
outputs = { self.nodes[0].getnewaddress() : 6.0 }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
# Should fail without add_inputs:
assert_raises_rpc_error(-4, ERR_NOT_ENOUGH_PRESET_INPUTS, self.nodes[2].fundrawtransaction, rawtx, add_inputs=False)
rawtxfund = self.nodes[2].fundrawtransaction(rawtx, add_inputs=True)
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
matchingOuts = 0
for out in dec_tx['vout']:
if out['scriptPubKey']['address'] in outputs:
matchingOuts+=1
assert_equal(matchingOuts, 1)
assert_equal(len(dec_tx['vout']), 2)
matchingIns = 0
for vinOut in dec_tx['vin']:
for vinIn in inputs:
if vinIn['txid'] == vinOut['txid']:
matchingIns+=1
assert_equal(matchingIns, 2) #we now must see two vins identical to vins given as params
def test_two_vin_two_vout(self):
self.log.info("Test fundrawtxn with 2 vins and 2 vouts")
utx = get_unspent(self.nodes[2].listunspent(), 1)
utx2 = get_unspent(self.nodes[2].listunspent(), 5)
inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']},{'txid' : utx2['txid'], 'vout' : utx2['vout']} ]
outputs = { self.nodes[0].getnewaddress() : 6.0, self.nodes[0].getnewaddress() : 1.0 }
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(utx['txid'], dec_tx['vin'][0]['txid'])
# Should fail without add_inputs:
assert_raises_rpc_error(-4, ERR_NOT_ENOUGH_PRESET_INPUTS, self.nodes[2].fundrawtransaction, rawtx, add_inputs=False)
rawtxfund = self.nodes[2].fundrawtransaction(rawtx, add_inputs=True)
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
matchingOuts = 0
for out in dec_tx['vout']:
if out['scriptPubKey']['address'] in outputs:
matchingOuts+=1
assert_equal(matchingOuts, 2)
assert_equal(len(dec_tx['vout']), 3)
def test_invalid_input(self):
self.log.info("Test fundrawtxn with an invalid vin")
txid = "1c7f966dab21119bac53213a2bc7532bff1fa844c124fd750a7d0b1332440bd1"
vout = 0
inputs = [ {'txid' : txid, 'vout' : vout} ] #invalid vin!
outputs = { self.nodes[0].getnewaddress() : 1.0}
rawtx = self.nodes[2].createrawtransaction(inputs, outputs)
assert_raises_rpc_error(-4, "Unable to find UTXO for external input", self.nodes[2].fundrawtransaction, rawtx)
def test_fee_p2pkh(self):
"""Compare fee of a standard pubkeyhash transaction."""
self.log.info("Test fundrawtxn p2pkh fee")
self.lock_outputs_type(self.nodes[0], "p2pkh")
inputs = []
outputs = {self.nodes[1].getnewaddress():1.1}
rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
fundedTx = self.nodes[0].fundrawtransaction(rawtx)
# Create same transaction over sendtoaddress.
txId = self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 1.1)
signedFee = self.nodes[0].getmempoolentry(txId)['fees']['base']
# Compare fee.
feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
assert feeDelta >= 0 and feeDelta <= self.fee_tolerance
self.unlock_utxos(self.nodes[0])
def test_fee_p2pkh_multi_out(self):
"""Compare fee of a standard pubkeyhash transaction with multiple outputs."""
self.log.info("Test fundrawtxn p2pkh fee with multiple outputs")
self.lock_outputs_type(self.nodes[0], "p2pkh")
inputs = []
outputs = {
self.nodes[1].getnewaddress():1.1,
self.nodes[1].getnewaddress():1.2,
self.nodes[1].getnewaddress():0.1,
self.nodes[1].getnewaddress():1.3,
self.nodes[1].getnewaddress():0.2,
self.nodes[1].getnewaddress():0.3,
}
rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
fundedTx = self.nodes[0].fundrawtransaction(rawtx)
# Create same transaction over sendtoaddress.
txId = self.nodes[0].sendmany("", outputs)
signedFee = self.nodes[0].getmempoolentry(txId)['fees']['base']
# Compare fee.
feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
assert feeDelta >= 0 and feeDelta <= self.fee_tolerance
self.unlock_utxos(self.nodes[0])
def test_fee_p2sh(self):
"""Compare fee of a 2-of-2 multisig p2sh transaction."""
self.lock_outputs_type(self.nodes[0], "p2pkh")
# Create 2-of-2 addr.
addr1 = self.nodes[1].getnewaddress()
addr2 = self.nodes[1].getnewaddress()
addr1Obj = self.nodes[1].getaddressinfo(addr1)
addr2Obj = self.nodes[1].getaddressinfo(addr2)
mSigObj = self.nodes[3].createmultisig(2, [addr1Obj['pubkey'], addr2Obj['pubkey']])['address']
inputs = []
outputs = {mSigObj:1.1}
rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
fundedTx = self.nodes[0].fundrawtransaction(rawtx)
# Create same transaction over sendtoaddress.
txId = self.nodes[0].sendtoaddress(mSigObj, 1.1)
signedFee = self.nodes[0].getmempoolentry(txId)['fees']['base']
# Compare fee.
feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
assert feeDelta >= 0 and feeDelta <= self.fee_tolerance
self.unlock_utxos(self.nodes[0])
def test_fee_4of5(self):
"""Compare fee of a standard pubkeyhash transaction."""
self.log.info("Test fundrawtxn fee with 4-of-5 addresses")
self.lock_outputs_type(self.nodes[0], "p2pkh")
# Create 4-of-5 addr.
addr1 = self.nodes[1].getnewaddress()
addr2 = self.nodes[1].getnewaddress()
addr3 = self.nodes[1].getnewaddress()
addr4 = self.nodes[1].getnewaddress()
addr5 = self.nodes[1].getnewaddress()
addr1Obj = self.nodes[1].getaddressinfo(addr1)
addr2Obj = self.nodes[1].getaddressinfo(addr2)
addr3Obj = self.nodes[1].getaddressinfo(addr3)
addr4Obj = self.nodes[1].getaddressinfo(addr4)
addr5Obj = self.nodes[1].getaddressinfo(addr5)
mSigObj = self.nodes[1].createmultisig(
4,
[
addr1Obj['pubkey'],
addr2Obj['pubkey'],
addr3Obj['pubkey'],
addr4Obj['pubkey'],
addr5Obj['pubkey'],
]
)['address']
inputs = []
outputs = {mSigObj:1.1}
rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
fundedTx = self.nodes[0].fundrawtransaction(rawtx)
# Create same transaction over sendtoaddress.
txId = self.nodes[0].sendtoaddress(mSigObj, 1.1)
signedFee = self.nodes[0].getmempoolentry(txId)['fees']['base']
# Compare fee.
feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
assert feeDelta >= 0 and feeDelta <= self.fee_tolerance
self.unlock_utxos(self.nodes[0])
def test_spend_2of2(self):
"""Spend a 2-of-2 multisig transaction over fundraw."""
self.log.info("Test fundpsbt spending 2-of-2 multisig")
# Create 2-of-2 addr.
addr1 = self.nodes[2].getnewaddress()
addr2 = self.nodes[2].getnewaddress()
addr1Obj = self.nodes[2].getaddressinfo(addr1)
addr2Obj = self.nodes[2].getaddressinfo(addr2)
self.nodes[2].createwallet(wallet_name='wmulti', disable_private_keys=True)
wmulti = self.nodes[2].get_wallet_rpc('wmulti')
w2 = self.nodes[2].get_wallet_rpc(self.default_wallet_name)
mSigObj = wmulti.addmultisigaddress(
2,
[
addr1Obj['pubkey'],
addr2Obj['pubkey'],
]
)['address']
if not self.options.descriptors:
wmulti.importaddress(mSigObj)
# Send 1.2 BTC to msig addr.
self.nodes[0].sendtoaddress(mSigObj, 1.2)
self.generate(self.nodes[0], 1)
oldBalance = self.nodes[1].getbalance()
inputs = []
outputs = {self.nodes[1].getnewaddress():1.1}
funded_psbt = wmulti.walletcreatefundedpsbt(inputs=inputs, outputs=outputs, changeAddress=w2.getrawchangeaddress())['psbt']
signed_psbt = w2.walletprocesspsbt(funded_psbt)
self.nodes[2].sendrawtransaction(signed_psbt['hex'])
self.generate(self.nodes[2], 1)
# Make sure funds are received at node1.
assert_equal(oldBalance+Decimal('1.10000000'), self.nodes[1].getbalance())
wmulti.unloadwallet()
def test_locked_wallet(self):
self.log.info("Test fundrawtxn with locked wallet and hardened derivation")
df_wallet = self.nodes[1].get_wallet_rpc(self.default_wallet_name)
self.nodes[1].createwallet(wallet_name="locked_wallet", descriptors=self.options.descriptors)
wallet = self.nodes[1].get_wallet_rpc("locked_wallet")
# This test is not meant to exercise fee estimation. Making sure all txs are sent at a consistent fee rate.
wallet.settxfee(self.min_relay_tx_fee)
# Add some balance to the wallet (this will be reverted at the end of the test)
df_wallet.sendall(recipients=[wallet.getnewaddress()])
self.generate(self.nodes[1], 1)
# Encrypt wallet and import descriptors
wallet.encryptwallet("test")
if self.options.descriptors:
with WalletUnlock(wallet, "test"):
wallet.importdescriptors([{
'desc': descsum_create('wpkh(tprv8ZgxMBicQKsPdYeeZbPSKd2KYLmeVKtcFA7kqCxDvDR13MQ6us8HopUR2wLcS2ZKPhLyKsqpDL2FtL73LMHcgoCL7DXsciA8eX8nbjCR2eG/0h/*h)'),
'timestamp': 'now',
'active': True
},
{
'desc': descsum_create('wpkh(tprv8ZgxMBicQKsPdYeeZbPSKd2KYLmeVKtcFA7kqCxDvDR13MQ6us8HopUR2wLcS2ZKPhLyKsqpDL2FtL73LMHcgoCL7DXsciA8eX8nbjCR2eG/1h/*h)'),
'timestamp': 'now',
'active': True,
'internal': True
}])
# Drain the keypool.
wallet.getnewaddress()
wallet.getrawchangeaddress()
# Choose input
inputs = wallet.listunspent()
# Deduce exact fee to produce a changeless transaction
tx_size = 110 # Total tx size: 110 vbytes, p2wpkh -> p2wpkh. Input 68 vbytes + rest of tx is 42 vbytes.
value = inputs[0]["amount"] - get_fee(tx_size, self.min_relay_tx_fee)
outputs = {self.nodes[0].getnewaddress():value}
rawtx = wallet.createrawtransaction(inputs, outputs)
# fund a transaction that does not require a new key for the change output
funded_tx = wallet.fundrawtransaction(rawtx)
assert_equal(funded_tx["changepos"], -1)
# fund a transaction that requires a new key for the change output
# creating the key must be impossible because the wallet is locked
outputs = {self.nodes[0].getnewaddress():value - Decimal("0.1")}
rawtx = wallet.createrawtransaction(inputs, outputs)
assert_raises_rpc_error(-4, "Transaction needs a change address, but we can't generate it.", wallet.fundrawtransaction, rawtx)
# Refill the keypool.
with WalletUnlock(wallet, "test"):
wallet.keypoolrefill(8) #need to refill the keypool to get an internal change address
assert_raises_rpc_error(-13, "walletpassphrase", wallet.sendtoaddress, self.nodes[0].getnewaddress(), 1.2)
oldBalance = self.nodes[0].getbalance()
inputs = []
outputs = {self.nodes[0].getnewaddress():1.1}
rawtx = wallet.createrawtransaction(inputs, outputs)
fundedTx = wallet.fundrawtransaction(rawtx)
assert fundedTx["changepos"] != -1
# Now we need to unlock.
with WalletUnlock(wallet, "test"):
signedTx = wallet.signrawtransactionwithwallet(fundedTx['hex'])
wallet.sendrawtransaction(signedTx['hex'])
self.generate(self.nodes[1], 1)
# Make sure funds are received at node1.
assert_equal(oldBalance+Decimal('51.10000000'), self.nodes[0].getbalance())
# Restore pre-test wallet state
wallet.sendall(recipients=[df_wallet.getnewaddress(), df_wallet.getnewaddress(), df_wallet.getnewaddress()])
wallet.unloadwallet()
self.generate(self.nodes[1], 1)
def test_many_inputs_fee(self):
"""Multiple (~19) inputs tx test | Compare fee."""
self.log.info("Test fundrawtxn fee with many inputs")
# Empty node1, send some small coins from node0 to node1.
self.nodes[1].sendall(recipients=[self.nodes[0].getnewaddress()])
self.generate(self.nodes[1], 1)
for _ in range(20):
self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 0.01)
self.generate(self.nodes[0], 1)
# Fund a tx with ~20 small inputs.
inputs = []
outputs = {self.nodes[0].getnewaddress():0.15,self.nodes[0].getnewaddress():0.04}
rawtx = self.nodes[1].createrawtransaction(inputs, outputs)
fundedTx = self.nodes[1].fundrawtransaction(rawtx)
# Create same transaction over sendtoaddress.
txId = self.nodes[1].sendmany("", outputs)
signedFee = self.nodes[1].getmempoolentry(txId)['fees']['base']
# Compare fee.
feeDelta = Decimal(fundedTx['fee']) - Decimal(signedFee)
assert feeDelta >= 0 and feeDelta <= self.fee_tolerance * 19 #~19 inputs
def test_many_inputs_send(self):
"""Multiple (~19) inputs tx test | sign/send."""
self.log.info("Test fundrawtxn sign+send with many inputs")
# Again, empty node1, send some small coins from node0 to node1.
self.nodes[1].sendall(recipients=[self.nodes[0].getnewaddress()])
self.generate(self.nodes[1], 1)
for _ in range(20):
self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 0.01)
self.generate(self.nodes[0], 1)
# Fund a tx with ~20 small inputs.
oldBalance = self.nodes[0].getbalance()
inputs = []
outputs = {self.nodes[0].getnewaddress():0.15,self.nodes[0].getnewaddress():0.04}
rawtx = self.nodes[1].createrawtransaction(inputs, outputs)
fundedTx = self.nodes[1].fundrawtransaction(rawtx)
fundedAndSignedTx = self.nodes[1].signrawtransactionwithwallet(fundedTx['hex'])
self.nodes[1].sendrawtransaction(fundedAndSignedTx['hex'])
self.generate(self.nodes[1], 1)
assert_equal(oldBalance+Decimal('50.19000000'), self.nodes[0].getbalance()) #0.19+block reward
def test_op_return(self):
self.log.info("Test fundrawtxn with OP_RETURN and no vin")
rawtx = "0100000000010000000000000000066a047465737400000000"
dec_tx = self.nodes[2].decoderawtransaction(rawtx)
assert_equal(len(dec_tx['vin']), 0)
assert_equal(len(dec_tx['vout']), 1)
rawtxfund = self.nodes[2].fundrawtransaction(rawtx)
dec_tx = self.nodes[2].decoderawtransaction(rawtxfund['hex'])
assert_greater_than(len(dec_tx['vin']), 0) # at least one vin
assert_equal(len(dec_tx['vout']), 2) # one change output added
def test_watchonly(self):
self.log.info("Test fundrawtxn using only watchonly")
inputs = []
outputs = {self.nodes[2].getnewaddress(): self.watchonly_amount / 2}
rawtx = self.nodes[3].createrawtransaction(inputs, outputs)
self.nodes[3].loadwallet('wwatch')
wwatch = self.nodes[3].get_wallet_rpc('wwatch')
# Setup change addresses for the watchonly wallet
desc_import = [{
"desc": descsum_create("wpkh(tpubD6NzVbkrYhZ4YNXVQbNhMK1WqguFsUXceaVJKbmno2aZ3B6QfbMeraaYvnBSGpV3vxLyTTK9DYT1yoEck4XUScMzXoQ2U2oSmE2JyMedq3H/1/*)"),
"timestamp": "now",
"internal": True,
"active": True,
"keypool": True,
"range": [0, 100],
"watchonly": True,
}]
if self.options.descriptors:
wwatch.importdescriptors(desc_import)
else:
wwatch.importmulti(desc_import)
# Backward compatibility test (2nd params is includeWatching)
result = wwatch.fundrawtransaction(rawtx, True)
res_dec = self.nodes[0].decoderawtransaction(result["hex"])
assert_equal(len(res_dec["vin"]), 1)
assert_equal(res_dec["vin"][0]["txid"], self.watchonly_utxo['txid'])
assert "fee" in result.keys()
assert_greater_than(result["changepos"], -1)
wwatch.unloadwallet()
def test_all_watched_funds(self):
self.log.info("Test fundrawtxn using entirety of watched funds")
inputs = []
outputs = {self.nodes[2].getnewaddress(): self.watchonly_amount}
rawtx = self.nodes[3].createrawtransaction(inputs, outputs)
self.nodes[3].loadwallet('wwatch')
wwatch = self.nodes[3].get_wallet_rpc('wwatch')
w3 = self.nodes[3].get_wallet_rpc(self.default_wallet_name)
result = wwatch.fundrawtransaction(rawtx, includeWatching=True, changeAddress=w3.getrawchangeaddress(), subtractFeeFromOutputs=[0])
res_dec = self.nodes[0].decoderawtransaction(result["hex"])
assert_equal(len(res_dec["vin"]), 1)
assert res_dec["vin"][0]["txid"] == self.watchonly_utxo['txid']
assert_greater_than(result["fee"], 0)
assert_equal(result["changepos"], -1)
assert_equal(result["fee"] + res_dec["vout"][0]["value"], self.watchonly_amount)
signedtx = wwatch.signrawtransactionwithwallet(result["hex"])
assert not signedtx["complete"]
signedtx = self.nodes[0].signrawtransactionwithwallet(signedtx["hex"])
assert signedtx["complete"]
self.nodes[0].sendrawtransaction(signedtx["hex"])
self.generate(self.nodes[0], 1)
wwatch.unloadwallet()
def test_option_feerate(self):
self.log.info("Test fundrawtxn with explicit fee rates (fee_rate sat/vB and feeRate BTC/kvB)")
node = self.nodes[3]
# Make sure there is exactly one input so coin selection can't skew the result.
assert_equal(len(self.nodes[3].listunspent(1)), 1)
inputs = []
outputs = {node.getnewaddress() : 1}
rawtx = node.createrawtransaction(inputs, outputs)
result = node.fundrawtransaction(rawtx) # uses self.min_relay_tx_fee (set by settxfee)
btc_kvb_to_sat_vb = 100000 # (1e5)
result1 = node.fundrawtransaction(rawtx, fee_rate=str(2 * btc_kvb_to_sat_vb * self.min_relay_tx_fee))
result2 = node.fundrawtransaction(rawtx, feeRate=2 * self.min_relay_tx_fee)
result3 = node.fundrawtransaction(rawtx, fee_rate=10 * btc_kvb_to_sat_vb * self.min_relay_tx_fee)
result4 = node.fundrawtransaction(rawtx, feeRate=str(10 * self.min_relay_tx_fee))
result_fee_rate = result['fee'] * 1000 / count_bytes(result['hex'])
assert_fee_amount(result1['fee'], count_bytes(result1['hex']), 2 * result_fee_rate)
assert_fee_amount(result2['fee'], count_bytes(result2['hex']), 2 * result_fee_rate)
assert_fee_amount(result3['fee'], count_bytes(result3['hex']), 10 * result_fee_rate)
assert_fee_amount(result4['fee'], count_bytes(result4['hex']), 10 * result_fee_rate)
# Test that funding non-standard "zero-fee" transactions is valid.
for param, zero_value in product(["fee_rate", "feeRate"], [0, 0.000, 0.00000000, "0", "0.000", "0.00000000"]):
assert_equal(self.nodes[3].fundrawtransaction(rawtx, {param: zero_value})["fee"], 0)
# With no arguments passed, expect fee of 141 satoshis.
assert_approx(node.fundrawtransaction(rawtx)["fee"], vexp=0.00000141, vspan=0.00000001)
# Expect fee to be 10,000x higher when an explicit fee rate 10,000x greater is specified.
result = node.fundrawtransaction(rawtx, fee_rate=10000)
assert_approx(result["fee"], vexp=0.0141, vspan=0.0001)
self.log.info("Test fundrawtxn with invalid estimate_mode settings")
for k, v in {"number": 42, "object": {"foo": "bar"}}.items():
assert_raises_rpc_error(-3, f"JSON value of type {k} for field estimate_mode is not of expected type string",
node.fundrawtransaction, rawtx, estimate_mode=v, conf_target=0.1, add_inputs=True)
for mode in ["", "foo", Decimal("3.141592")]:
assert_raises_rpc_error(-8, 'Invalid estimate_mode parameter, must be one of: "unset", "economical", "conservative"',
node.fundrawtransaction, rawtx, estimate_mode=mode, conf_target=0.1, add_inputs=True)
self.log.info("Test fundrawtxn with invalid conf_target settings")
for mode in ["unset", "economical", "conservative"]:
self.log.debug("{}".format(mode))
for k, v in {"string": "", "object": {"foo": "bar"}}.items():
assert_raises_rpc_error(-3, f"JSON value of type {k} for field conf_target is not of expected type number",
node.fundrawtransaction, rawtx, estimate_mode=mode, conf_target=v, add_inputs=True)
for n in [-1, 0, 1009]:
assert_raises_rpc_error(-8, "Invalid conf_target, must be between 1 and 1008", # max value of 1008 per src/policy/fees.h
node.fundrawtransaction, rawtx, estimate_mode=mode, conf_target=n, add_inputs=True)
self.log.info("Test invalid fee rate settings")
for param, value in {("fee_rate", 100000), ("feeRate", 1.000)}:
assert_raises_rpc_error(-4, "Fee exceeds maximum configured by user (e.g. -maxtxfee, maxfeerate)",
node.fundrawtransaction, rawtx, add_inputs=True, **{param: value})
assert_raises_rpc_error(-3, "Amount out of range",
node.fundrawtransaction, rawtx, add_inputs=True, **{param: -1})
assert_raises_rpc_error(-3, "Amount is not a number or string",
node.fundrawtransaction, rawtx, add_inputs=True, **{param: {"foo": "bar"}})
# Test fee rate values that don't pass fixed-point parsing checks.
for invalid_value in ["", 0.000000001, 1e-09, 1.111111111, 1111111111111111, "31.999999999999999999999"]:
assert_raises_rpc_error(-3, "Invalid amount", node.fundrawtransaction, rawtx, add_inputs=True, **{param: invalid_value})
# Test fee_rate values that cannot be represented in sat/vB.
for invalid_value in [0.0001, 0.00000001, 0.00099999, 31.99999999]:
assert_raises_rpc_error(-3, "Invalid amount",
node.fundrawtransaction, rawtx, fee_rate=invalid_value, add_inputs=True)
self.log.info("Test min fee rate checks are bypassed with fundrawtxn, e.g. a fee_rate under 1 sat/vB is allowed")
node.fundrawtransaction(rawtx, fee_rate=0.999, add_inputs=True)
node.fundrawtransaction(rawtx, feeRate=0.00000999, add_inputs=True)
self.log.info("- raises RPC error if both feeRate and fee_rate are passed")
assert_raises_rpc_error(-8, "Cannot specify both fee_rate (sat/vB) and feeRate (BTC/kvB)",
node.fundrawtransaction, rawtx, fee_rate=0.1, feeRate=0.1, add_inputs=True)
self.log.info("- raises RPC error if both feeRate and estimate_mode passed")
assert_raises_rpc_error(-8, "Cannot specify both estimate_mode and feeRate",
node.fundrawtransaction, rawtx, estimate_mode="economical", feeRate=0.1, add_inputs=True)
for param in ["feeRate", "fee_rate"]:
self.log.info("- raises RPC error if both {} and conf_target are passed".format(param))
assert_raises_rpc_error(-8, "Cannot specify both conf_target and {}. Please provide either a confirmation "
"target in blocks for automatic fee estimation, or an explicit fee rate.".format(param),
node.fundrawtransaction, rawtx, {param: 1, "conf_target": 1, "add_inputs": True})
self.log.info("- raises RPC error if both fee_rate and estimate_mode are passed")
assert_raises_rpc_error(-8, "Cannot specify both estimate_mode and fee_rate",
node.fundrawtransaction, rawtx, fee_rate=1, estimate_mode="economical", add_inputs=True)
def test_address_reuse(self):
"""Test no address reuse occurs."""
self.log.info("Test fundrawtxn does not reuse addresses")
rawtx = self.nodes[3].createrawtransaction(inputs=[], outputs={self.nodes[3].getnewaddress(): 1})
result3 = self.nodes[3].fundrawtransaction(rawtx)
res_dec = self.nodes[0].decoderawtransaction(result3["hex"])
changeaddress = ""
for out in res_dec['vout']:
if out['value'] > 1.0:
changeaddress += out['scriptPubKey']['address']
assert changeaddress != ""
nextaddr = self.nodes[3].getnewaddress()
# Now the change address key should be removed from the keypool.
assert changeaddress != nextaddr
def test_option_subtract_fee_from_outputs(self):
self.log.info("Test fundrawtxn subtractFeeFromOutputs option")
# Make sure there is exactly one input so coin selection can't skew the result.
assert_equal(len(self.nodes[3].listunspent(1)), 1)
inputs = []
outputs = {self.nodes[2].getnewaddress(): 1}
rawtx = self.nodes[3].createrawtransaction(inputs, outputs)
# Test subtract fee from outputs with feeRate (BTC/kvB)
result = [self.nodes[3].fundrawtransaction(rawtx), # uses self.min_relay_tx_fee (set by settxfee)
self.nodes[3].fundrawtransaction(rawtx, subtractFeeFromOutputs=[]), # empty subtraction list
self.nodes[3].fundrawtransaction(rawtx, subtractFeeFromOutputs=[0]), # uses self.min_relay_tx_fee (set by settxfee)
self.nodes[3].fundrawtransaction(rawtx, feeRate=2 * self.min_relay_tx_fee),
self.nodes[3].fundrawtransaction(rawtx, feeRate=2 * self.min_relay_tx_fee, subtractFeeFromOutputs=[0]),]
dec_tx = [self.nodes[3].decoderawtransaction(tx_['hex']) for tx_ in result]
output = [d['vout'][1 - r['changepos']]['value'] for d, r in zip(dec_tx, result)]
change = [d['vout'][r['changepos']]['value'] for d, r in zip(dec_tx, result)]
assert_equal(result[0]['fee'], result[1]['fee'], result[2]['fee'])
assert_equal(result[3]['fee'], result[4]['fee'])
assert_equal(change[0], change[1])
assert_equal(output[0], output[1])
assert_equal(output[0], output[2] + result[2]['fee'])
assert_equal(change[0] + result[0]['fee'], change[2])
assert_equal(output[3], output[4] + result[4]['fee'])
assert_equal(change[3] + result[3]['fee'], change[4])
# Test subtract fee from outputs with fee_rate (sat/vB)
btc_kvb_to_sat_vb = 100000 # (1e5)
result = [self.nodes[3].fundrawtransaction(rawtx), # uses self.min_relay_tx_fee (set by settxfee)
self.nodes[3].fundrawtransaction(rawtx, subtractFeeFromOutputs=[]), # empty subtraction list
self.nodes[3].fundrawtransaction(rawtx, subtractFeeFromOutputs=[0]), # uses self.min_relay_tx_fee (set by settxfee)
self.nodes[3].fundrawtransaction(rawtx, fee_rate=2 * btc_kvb_to_sat_vb * self.min_relay_tx_fee),
self.nodes[3].fundrawtransaction(rawtx, fee_rate=2 * btc_kvb_to_sat_vb * self.min_relay_tx_fee, subtractFeeFromOutputs=[0]),]
dec_tx = [self.nodes[3].decoderawtransaction(tx_['hex']) for tx_ in result]
output = [d['vout'][1 - r['changepos']]['value'] for d, r in zip(dec_tx, result)]
change = [d['vout'][r['changepos']]['value'] for d, r in zip(dec_tx, result)]
assert_equal(result[0]['fee'], result[1]['fee'], result[2]['fee'])
assert_equal(result[3]['fee'], result[4]['fee'])
assert_equal(change[0], change[1])
assert_equal(output[0], output[1])
assert_equal(output[0], output[2] + result[2]['fee'])
assert_equal(change[0] + result[0]['fee'], change[2])
assert_equal(output[3], output[4] + result[4]['fee'])
assert_equal(change[3] + result[3]['fee'], change[4])
inputs = []
outputs = {self.nodes[2].getnewaddress(): value for value in (1.0, 1.1, 1.2, 1.3)}
rawtx = self.nodes[3].createrawtransaction(inputs, outputs)
result = [self.nodes[3].fundrawtransaction(rawtx),
# Split the fee between outputs 0, 2, and 3, but not output 1.
self.nodes[3].fundrawtransaction(rawtx, subtractFeeFromOutputs=[0, 2, 3])]
dec_tx = [self.nodes[3].decoderawtransaction(result[0]['hex']),
self.nodes[3].decoderawtransaction(result[1]['hex'])]
# Nested list of non-change output amounts for each transaction.
output = [[out['value'] for i, out in enumerate(d['vout']) if i != r['changepos']]
for d, r in zip(dec_tx, result)]
# List of differences in output amounts between normal and subtractFee transactions.
share = [o0 - o1 for o0, o1 in zip(output[0], output[1])]
# Output 1 is the same in both transactions.
assert_equal(share[1], 0)
# The other 3 outputs are smaller as a result of subtractFeeFromOutputs.
assert_greater_than(share[0], 0)
assert_greater_than(share[2], 0)
assert_greater_than(share[3], 0)
# Outputs 2 and 3 take the same share of the fee.
assert_equal(share[2], share[3])
# Output 0 takes at least as much share of the fee, and no more than 2
# satoshis more, than outputs 2 and 3.
assert_greater_than_or_equal(share[0], share[2])
assert_greater_than_or_equal(share[2] + Decimal(2e-8), share[0])
# The fee is the same in both transactions.
assert_equal(result[0]['fee'], result[1]['fee'])
# The total subtracted from the outputs is equal to the fee.
assert_equal(share[0] + share[2] + share[3], result[0]['fee'])
def test_subtract_fee_with_presets(self):
self.log.info("Test fundrawtxn subtract fee from outputs with preset inputs that are sufficient")
addr = self.nodes[0].getnewaddress()
utxo = self.create_outpoints(self.nodes[0], outputs=[{addr: 10}])[0]
rawtx = self.nodes[0].createrawtransaction([utxo], [{self.nodes[0].getnewaddress(): 5}])
fundedtx = self.nodes[0].fundrawtransaction(rawtx, subtractFeeFromOutputs=[0])
signedtx = self.nodes[0].signrawtransactionwithwallet(fundedtx['hex'])
self.nodes[0].sendrawtransaction(signedtx['hex'])
def test_transaction_too_large(self):
self.log.info("Test fundrawtx where BnB solution would result in a too large transaction, but Knapsack would not")
self.nodes[0].createwallet("large")
wallet = self.nodes[0].get_wallet_rpc(self.default_wallet_name)
recipient = self.nodes[0].get_wallet_rpc("large")
outputs = {}
rawtx = recipient.createrawtransaction([], {wallet.getnewaddress(): 147.99899260})
# Make 1500 0.1 BTC outputs. The amount that we target for funding is in
# the BnB range when these outputs are used. However if these outputs
# are selected, the transaction will end up being too large, so it
# shouldn't use BnB and instead fall back to Knapsack but that behavior
# is not implemented yet. For now we just check that we get an error.
# First, force the wallet to bulk-generate the addresses we'll need.
recipient.keypoolrefill(1500)
for _ in range(1500):
outputs[recipient.getnewaddress()] = 0.1
wallet.sendmany("", outputs)
self.generate(self.nodes[0], 10)
assert_raises_rpc_error(-4, "The inputs size exceeds the maximum weight. "
"Please try sending a smaller amount or manually consolidating your wallet's UTXOs",
recipient.fundrawtransaction, rawtx)
self.nodes[0].unloadwallet("large")
def test_external_inputs(self):
self.log.info("Test funding with external inputs")
privkey, _ = generate_keypair(wif=True)
self.nodes[2].createwallet("extfund")
wallet = self.nodes[2].get_wallet_rpc("extfund")
# Make a weird but signable script. sh(pkh()) descriptor accomplishes this
desc = descsum_create("sh(pkh({}))".format(privkey))
if self.options.descriptors:
res = self.nodes[0].importdescriptors([{"desc": desc, "timestamp": "now"}])
else:
res = self.nodes[0].importmulti([{"desc": desc, "timestamp": "now"}])
assert res[0]["success"]
addr = self.nodes[0].deriveaddresses(desc)[0]
addr_info = self.nodes[0].getaddressinfo(addr)
self.nodes[0].sendtoaddress(addr, 10)
self.nodes[0].sendtoaddress(wallet.getnewaddress(), 10)
self.generate(self.nodes[0], 6)
ext_utxo = self.nodes[0].listunspent(addresses=[addr])[0]
# An external input without solving data should result in an error
raw_tx = wallet.createrawtransaction([ext_utxo], {self.nodes[0].getnewaddress(): ext_utxo["amount"] / 2})
assert_raises_rpc_error(-4, "Not solvable pre-selected input COutPoint(%s, %s)" % (ext_utxo["txid"][0:10], ext_utxo["vout"]), wallet.fundrawtransaction, raw_tx)
# Error conditions
assert_raises_rpc_error(-5, 'Pubkey "not a pubkey" must be a hex string', wallet.fundrawtransaction, raw_tx, solving_data={"pubkeys":["not a pubkey"]})
assert_raises_rpc_error(-5, 'Pubkey "01234567890a0b0c0d0e0f" must have a length of either 33 or 65 bytes', wallet.fundrawtransaction, raw_tx, solving_data={"pubkeys":["01234567890a0b0c0d0e0f"]})
assert_raises_rpc_error(-5, "'not a script' is not hex", wallet.fundrawtransaction, raw_tx, solving_data={"scripts":["not a script"]})
assert_raises_rpc_error(-8, "Unable to parse descriptor 'not a descriptor'", wallet.fundrawtransaction, raw_tx, solving_data={"descriptors":["not a descriptor"]})
assert_raises_rpc_error(-8, "Invalid parameter, missing vout key", wallet.fundrawtransaction, raw_tx, input_weights=[{"txid": ext_utxo["txid"]}])
assert_raises_rpc_error(-8, "Invalid parameter, vout cannot be negative", wallet.fundrawtransaction, raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": -1}])
assert_raises_rpc_error(-8, "Invalid parameter, missing weight key", wallet.fundrawtransaction, raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"]}])
assert_raises_rpc_error(-8, "Invalid parameter, weight cannot be less than 165", wallet.fundrawtransaction, raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": 164}])
assert_raises_rpc_error(-8, "Invalid parameter, weight cannot be less than 165", wallet.fundrawtransaction, raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": -1}])
assert_raises_rpc_error(-8, "Invalid parameter, weight cannot be greater than", wallet.fundrawtransaction, raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": 400001}])
# But funding should work when the solving data is provided
funded_tx = wallet.fundrawtransaction(raw_tx, solving_data={"pubkeys": [addr_info['pubkey']], "scripts": [addr_info["embedded"]["scriptPubKey"]]})
signed_tx = wallet.signrawtransactionwithwallet(funded_tx['hex'])
assert not signed_tx['complete']
signed_tx = self.nodes[0].signrawtransactionwithwallet(signed_tx['hex'])
assert signed_tx['complete']
funded_tx = wallet.fundrawtransaction(raw_tx, solving_data={"descriptors": [desc]})
signed_tx1 = wallet.signrawtransactionwithwallet(funded_tx['hex'])
assert not signed_tx1['complete']
signed_tx2 = self.nodes[0].signrawtransactionwithwallet(signed_tx1['hex'])
assert signed_tx2['complete']
unsigned_weight = self.nodes[0].decoderawtransaction(signed_tx1["hex"])["weight"]
signed_weight = self.nodes[0].decoderawtransaction(signed_tx2["hex"])["weight"]
# Input's weight is difference between weight of signed and unsigned,
# and the weight of stuff that didn't change (prevout, sequence, 1 byte of scriptSig)
input_weight = signed_weight - unsigned_weight + (41 * 4)
low_input_weight = input_weight // 2
high_input_weight = input_weight * 2
# Funding should also work if the input weight is provided
funded_tx = wallet.fundrawtransaction(raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": input_weight}], fee_rate=2)
signed_tx = wallet.signrawtransactionwithwallet(funded_tx["hex"])
signed_tx = self.nodes[0].signrawtransactionwithwallet(signed_tx["hex"])
assert_equal(self.nodes[0].testmempoolaccept([signed_tx["hex"]])[0]["allowed"], True)
assert_equal(signed_tx["complete"], True)
# Reducing the weight should have a lower fee
funded_tx2 = wallet.fundrawtransaction(raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": low_input_weight}], fee_rate=2)
assert_greater_than(funded_tx["fee"], funded_tx2["fee"])
# Increasing the weight should have a higher fee
funded_tx2 = wallet.fundrawtransaction(raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": high_input_weight}], fee_rate=2)
assert_greater_than(funded_tx2["fee"], funded_tx["fee"])
# The provided weight should override the calculated weight when solving data is provided
funded_tx3 = wallet.fundrawtransaction(raw_tx, solving_data={"descriptors": [desc]}, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": high_input_weight}], fee_rate=2)
assert_equal(funded_tx2["fee"], funded_tx3["fee"])
# The feerate should be met
funded_tx4 = wallet.fundrawtransaction(raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": high_input_weight}], fee_rate=10)
input_add_weight = high_input_weight - (41 * 4)
tx4_weight = wallet.decoderawtransaction(funded_tx4["hex"])["weight"] + input_add_weight
tx4_vsize = int(ceil(tx4_weight / 4))
assert_fee_amount(funded_tx4["fee"], tx4_vsize, Decimal(0.0001))
# Funding with weight at csuint boundaries should not cause problems
funded_tx = wallet.fundrawtransaction(raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": 255}], fee_rate=2)
funded_tx = wallet.fundrawtransaction(raw_tx, input_weights=[{"txid": ext_utxo["txid"], "vout": ext_utxo["vout"], "weight": 65539}], fee_rate=2)
self.nodes[2].unloadwallet("extfund")
def test_add_inputs_default_value(self):
self.log.info("Test 'add_inputs' default value")
# Create and fund the wallet with 5 BTC
self.nodes[2].createwallet("test_preset_inputs")
wallet = self.nodes[2].get_wallet_rpc("test_preset_inputs")
addr1 = wallet.getnewaddress(address_type="bech32")
self.nodes[0].sendtoaddress(addr1, 5)
self.generate(self.nodes[0], 1)
# Covered cases:
# 1. Default add_inputs value with no preset inputs (add_inputs=true):
# Expect: automatically add coins from the wallet to the tx.
# 2. Default add_inputs value with preset inputs (add_inputs=false):
# Expect: disallow automatic coin selection.
# 3. Explicit add_inputs=true and preset inputs (with preset inputs not-covering the target amount).
# Expect: include inputs from the wallet.
# 4. Explicit add_inputs=true and preset inputs (with preset inputs covering the target amount).
# Expect: only preset inputs are used.
# 5. Explicit add_inputs=true, no preset inputs (same as (1) but with an explicit set):
# Expect: include inputs from the wallet.
# 6. Explicit add_inputs=false, no preset inputs:
# Expect: failure as we did not provide inputs and the process cannot automatically select coins.
# Case (1), 'send' command
# 'add_inputs' value is true unless "inputs" are specified, in such case, add_inputs=false.
# So, the wallet will automatically select coins and create the transaction if only the outputs are provided.
tx = wallet.send(outputs=[{addr1: 3}])
assert tx["complete"]
# Case (2), 'send' command
# Select an input manually, which doesn't cover the entire output amount and
# verify that the dynamically set 'add_inputs=false' value works.
# Fund wallet with 2 outputs, 5 BTC each.
addr2 = wallet.getnewaddress(address_type="bech32")
source_tx = self.nodes[0].send(outputs=[{addr1: 5}, {addr2: 5}], change_position=0)
self.generate(self.nodes[0], 1)
# Select only one input.
options = {
"inputs": [
{
"txid": source_tx["txid"],
"vout": 1 # change position was hardcoded to index 0
}
]
}
assert_raises_rpc_error(-4, ERR_NOT_ENOUGH_PRESET_INPUTS, wallet.send, outputs=[{addr1: 8}], **options)
# Case (3), Explicit add_inputs=true and preset inputs (with preset inputs not-covering the target amount)
options["add_inputs"] = True
options["add_to_wallet"] = False
tx = wallet.send(outputs=[{addr1: 8}], **options)
assert tx["complete"]
# Case (4), Explicit add_inputs=true and preset inputs (with preset inputs covering the target amount)
options["inputs"].append({
"txid": source_tx["txid"],
"vout": 2 # change position was hardcoded to index 0
})
tx = wallet.send(outputs=[{addr1: 8}], **options)
assert tx["complete"]
# Check that only the preset inputs were added to the tx
decoded_psbt_inputs = self.nodes[0].decodepsbt(tx["psbt"])['tx']['vin']
assert_equal(len(decoded_psbt_inputs), 2)
for input in decoded_psbt_inputs:
assert_equal(input["txid"], source_tx["txid"])
# Case (5), assert that inputs are added to the tx by explicitly setting add_inputs=true
options = {"add_inputs": True, "add_to_wallet": True}
tx = wallet.send(outputs=[{addr1: 8}], **options)
assert tx["complete"]
# 6. Explicit add_inputs=false, no preset inputs:
options = {"add_inputs": False}
assert_raises_rpc_error(-4, ERR_NOT_ENOUGH_PRESET_INPUTS, wallet.send, outputs=[{addr1: 3}], **options)
################################################
# Case (1), 'walletcreatefundedpsbt' command
# Default add_inputs value with no preset inputs (add_inputs=true)
inputs = []
outputs = {self.nodes[1].getnewaddress(): 8}
assert "psbt" in wallet.walletcreatefundedpsbt(inputs=inputs, outputs=outputs)
# Case (2), 'walletcreatefundedpsbt' command
# Default add_inputs value with preset inputs (add_inputs=false).
inputs = [{
"txid": source_tx["txid"],
"vout": 1 # change position was hardcoded to index 0
}]
outputs = {self.nodes[1].getnewaddress(): 8}
assert_raises_rpc_error(-4, ERR_NOT_ENOUGH_PRESET_INPUTS, wallet.walletcreatefundedpsbt, inputs=inputs, outputs=outputs)
# Case (3), Explicit add_inputs=true and preset inputs (with preset inputs not-covering the target amount)
options["add_inputs"] = True
assert "psbt" in wallet.walletcreatefundedpsbt(outputs=[{addr1: 8}], inputs=inputs, **options)
# Case (4), Explicit add_inputs=true and preset inputs (with preset inputs covering the target amount)
inputs.append({
"txid": source_tx["txid"],
"vout": 2 # change position was hardcoded to index 0
})
psbt_tx = wallet.walletcreatefundedpsbt(outputs=[{addr1: 8}], inputs=inputs, **options)
# Check that only the preset inputs were added to the tx
decoded_psbt_inputs = self.nodes[0].decodepsbt(psbt_tx["psbt"])['tx']['vin']
assert_equal(len(decoded_psbt_inputs), 2)
for input in decoded_psbt_inputs:
assert_equal(input["txid"], source_tx["txid"])
# Case (5), 'walletcreatefundedpsbt' command
# Explicit add_inputs=true, no preset inputs
options = {
"add_inputs": True
}
assert "psbt" in wallet.walletcreatefundedpsbt(inputs=[], outputs=outputs, **options)
# Case (6). Explicit add_inputs=false, no preset inputs:
options = {"add_inputs": False}
assert_raises_rpc_error(-4, ERR_NOT_ENOUGH_PRESET_INPUTS, wallet.walletcreatefundedpsbt, inputs=[], outputs=outputs, **options)
self.nodes[2].unloadwallet("test_preset_inputs")
def test_preset_inputs_selection(self):
self.log.info('Test wallet preset inputs are not double-counted or reused in coin selection')
# Create and fund the wallet with 4 UTXO of 5 BTC each (20 BTC total)
self.nodes[2].createwallet("test_preset_inputs_selection")
wallet = self.nodes[2].get_wallet_rpc("test_preset_inputs_selection")
outputs = {}
for _ in range(4):
outputs[wallet.getnewaddress(address_type="bech32")] = 5
self.nodes[0].sendmany("", outputs)
self.generate(self.nodes[0], 1)
# Select the preset inputs
coins = wallet.listunspent()
preset_inputs = [coins[0], coins[1], coins[2]]
# Now let's create the tx creation options
options = {
"inputs": preset_inputs,
"add_inputs": True, # automatically add coins from the wallet to fulfill the target
"subtract_fee_from_outputs": [0], # deduct fee from first output
"add_to_wallet": False
}
# Attempt to send 29 BTC from a wallet that only has 20 BTC. The wallet should exclude
# the preset inputs from the pool of available coins, realize that there is not enough
# money to fund the 29 BTC payment, and fail with "Insufficient funds".
#
# Even with SFFO, the wallet can only afford to send 20 BTC.
# If the wallet does not properly exclude preset inputs from the pool of available coins
# prior to coin selection, it may create a transaction that does not fund the full payment
# amount or, through SFFO, incorrectly reduce the recipient's amount by the difference
# between the original target and the wrongly counted inputs (in this case 9 BTC)
# so that the recipient's amount is no longer equal to the user's selected target of 29 BTC.
# First case, use 'subtract_fee_from_outputs = true'
assert_raises_rpc_error(-4, "Insufficient funds", wallet.send, outputs=[{wallet.getnewaddress(address_type="bech32"): 29}], options=options)
# Second case, don't use 'subtract_fee_from_outputs'
del options["subtract_fee_from_outputs"]
assert_raises_rpc_error(-4, "Insufficient funds", wallet.send, outputs=[{wallet.getnewaddress(address_type="bech32"): 29}], options=options)
self.nodes[2].unloadwallet("test_preset_inputs_selection")
def test_weight_calculation(self):
self.log.info("Test weight calculation with external inputs")
self.nodes[2].createwallet("test_weight_calculation")
wallet = self.nodes[2].get_wallet_rpc("test_weight_calculation")
addr = wallet.getnewaddress(address_type="bech32")
ext_addr = self.nodes[0].getnewaddress(address_type="bech32")
utxo, ext_utxo = self.create_outpoints(self.nodes[0], outputs=[{addr: 5}, {ext_addr: 5}])
self.nodes[0].sendtoaddress(wallet.getnewaddress(address_type="bech32"), 5)
self.generate(self.nodes[0], 1)
rawtx = wallet.createrawtransaction([utxo], [{self.nodes[0].getnewaddress(address_type="bech32"): 8}])
fundedtx = wallet.fundrawtransaction(rawtx, fee_rate=10, change_type="bech32")
# with 71-byte signatures we should expect following tx size
# tx overhead (10) + 2 inputs (41 each) + 2 p2wpkh (31 each) + (segwit marker and flag (2) + 2 p2wpkh 71 byte sig witnesses (107 each)) / witness scaling factor (4)
tx_size = ceil(10 + 41*2 + 31*2 + (2 + 107*2)/4)
assert_equal(fundedtx['fee'] * COIN, tx_size * 10)
# Using the other output should have 72 byte sigs
rawtx = wallet.createrawtransaction([ext_utxo], [{self.nodes[0].getnewaddress(): 13}])
ext_desc = self.nodes[0].getaddressinfo(ext_addr)["desc"]
fundedtx = wallet.fundrawtransaction(rawtx, fee_rate=10, change_type="bech32", solving_data={"descriptors": [ext_desc]})
# tx overhead (10) + 3 inputs (41 each) + 2 p2wpkh(31 each) + (segwit marker and flag (2) + 2 p2wpkh 71 bytes sig witnesses (107 each) + p2wpkh 72 byte sig witness (108)) / witness scaling factor (4)
tx_size = ceil(10 + 41*3 + 31*2 + (2 + 107*2 + 108)/4)
assert_equal(fundedtx['fee'] * COIN, tx_size * 10)
self.nodes[2].unloadwallet("test_weight_calculation")
def test_weight_limits(self):
self.log.info("Test weight limits")
self.nodes[2].createwallet("test_weight_limits")
wallet = self.nodes[2].get_wallet_rpc("test_weight_limits")
outputs = []
for _ in range(1472):
outputs.append({wallet.getnewaddress(address_type="legacy"): 0.1})
txid = self.nodes[0].send(outputs=outputs, change_position=0)["txid"]
self.generate(self.nodes[0], 1)
# 272 WU per input (273 when high-s); picking 1471 inputs will exceed the max standard tx weight.
rawtx = wallet.createrawtransaction([], [{wallet.getnewaddress(): 0.1 * 1471}])
# 1) Try to fund transaction only using the preset inputs (pick all 1472 inputs to cover the fee)
input_weights = []
for i in range(1, 1473): # skip first output as it is the parent tx change output
input_weights.append({"txid": txid, "vout": i, "weight": 273})
assert_raises_rpc_error(-4, "Transaction too large", wallet.fundrawtransaction, hexstring=rawtx, input_weights=input_weights)
# 2) Let the wallet fund the transaction
assert_raises_rpc_error(-4, "The inputs size exceeds the maximum weight. Please try sending a smaller amount or manually consolidating your wallet's UTXOs",
wallet.fundrawtransaction, hexstring=rawtx)
# 3) Pre-select some inputs and let the wallet fill-up the remaining amount
inputs = input_weights[0:1000]
assert_raises_rpc_error(-4, "The combination of the pre-selected inputs and the wallet automatic inputs selection exceeds the transaction maximum weight. Please try sending a smaller amount or manually consolidating your wallet's UTXOs",
wallet.fundrawtransaction, hexstring=rawtx, input_weights=inputs)
self.nodes[2].unloadwallet("test_weight_limits")
def test_include_unsafe(self):
self.log.info("Test fundrawtxn with unsafe inputs")
self.nodes[0].createwallet("unsafe")
wallet = self.nodes[0].get_wallet_rpc("unsafe")
# We receive unconfirmed funds from external keys (unsafe outputs).
addr = wallet.getnewaddress()
inputs = []
for i in range(0, 2):
utxo = self.create_outpoints(self.nodes[2], outputs=[{addr: 5}])[0]
inputs.append((utxo['txid'], utxo['vout']))
self.sync_mempools()
# Unsafe inputs are ignored by default.
rawtx = wallet.createrawtransaction([], [{self.nodes[2].getnewaddress(): 7.5}])
assert_raises_rpc_error(-4, "Insufficient funds", wallet.fundrawtransaction, rawtx)
# But we can opt-in to use them for funding.
fundedtx = wallet.fundrawtransaction(rawtx, include_unsafe=True)
tx_dec = wallet.decoderawtransaction(fundedtx['hex'])
assert all((txin["txid"], txin["vout"]) in inputs for txin in tx_dec["vin"])
signedtx = wallet.signrawtransactionwithwallet(fundedtx['hex'])
assert wallet.testmempoolaccept([signedtx['hex']])[0]["allowed"]
# And we can also use them once they're confirmed.
self.generate(self.nodes[0], 1)
fundedtx = wallet.fundrawtransaction(rawtx, include_unsafe=False)
tx_dec = wallet.decoderawtransaction(fundedtx['hex'])
assert all((txin["txid"], txin["vout"]) in inputs for txin in tx_dec["vin"])
signedtx = wallet.signrawtransactionwithwallet(fundedtx['hex'])
assert wallet.testmempoolaccept([signedtx['hex']])[0]["allowed"]
self.nodes[0].unloadwallet("unsafe")
def test_22670(self):
# In issue #22670, it was observed that ApproximateBestSubset may
# choose enough value to cover the target amount but not enough to cover the transaction fees.
# This leads to a transaction whose actual transaction feerate is lower than expected.
# However at normal feerates, the difference between the effective value and the real value
# that this bug is not detected because the transaction fee must be at least 0.01 BTC (the minimum change value).
# Otherwise the targeted minimum change value will be enough to cover the transaction fees that were not
# being accounted for. So the minimum relay fee is set to 0.1 BTC/kvB in this test.
self.log.info("Test issue 22670 ApproximateBestSubset bug")
# Make sure the default wallet will not be loaded when restarted with a high minrelaytxfee
self.nodes[0].unloadwallet(self.default_wallet_name, False)
feerate = Decimal("0.1")
self.restart_node(0, [f"-minrelaytxfee={feerate}", "-discardfee=0"]) # Set high minrelayfee, set discardfee to 0 for easier calculation
self.nodes[0].loadwallet(self.default_wallet_name, True)
funds = self.nodes[0].get_wallet_rpc(self.default_wallet_name)
self.nodes[0].createwallet(wallet_name="tester")
tester = self.nodes[0].get_wallet_rpc("tester")
# Because this test is specifically for ApproximateBestSubset, the target value must be greater
# than any single input available, and require more than 1 input. So we make 3 outputs
for i in range(0, 3):
funds.sendtoaddress(tester.getnewaddress(address_type="bech32"), 1)
self.generate(self.nodes[0], 1, sync_fun=self.no_op)
# Create transactions in order to calculate fees for the target bounds that can trigger this bug
change_tx = tester.fundrawtransaction(tester.createrawtransaction([], [{funds.getnewaddress(): 1.5}]))
tx = tester.createrawtransaction([], [{funds.getnewaddress(): 2}])
no_change_tx = tester.fundrawtransaction(tx, subtractFeeFromOutputs=[0])
overhead_fees = feerate * len(tx) / 2 / 1000
cost_of_change = change_tx["fee"] - no_change_tx["fee"]
fees = no_change_tx["fee"]
assert_greater_than(fees, 0.01)
def do_fund_send(target):
create_tx = tester.createrawtransaction([], [{funds.getnewaddress(): target}])
funded_tx = tester.fundrawtransaction(create_tx)
signed_tx = tester.signrawtransactionwithwallet(funded_tx["hex"])
assert signed_tx["complete"]
decoded_tx = tester.decoderawtransaction(signed_tx["hex"])
assert_equal(len(decoded_tx["vin"]), 3)
assert tester.testmempoolaccept([signed_tx["hex"]])[0]["allowed"]
# We want to choose more value than is available in 2 inputs when considering the fee,
# but not enough to need 3 inputs when not considering the fee.
# So the target value must be at least 2.00000001 - fee.
lower_bound = Decimal("2.00000001") - fees
# The target value must be at most 2 - cost_of_change - not_input_fees - min_change (these are all
# included in the target before ApproximateBestSubset).
upper_bound = Decimal("2.0") - cost_of_change - overhead_fees - Decimal("0.01")
assert_greater_than_or_equal(upper_bound, lower_bound)
do_fund_send(lower_bound)
do_fund_send(upper_bound)
self.restart_node(0)
self.connect_nodes(0, 1)
self.connect_nodes(0, 2)
self.connect_nodes(0, 3)
def test_feerate_rounding(self):
self.log.info("Test that rounding of GetFee does not result in an assertion")
self.nodes[1].createwallet("roundtest")
w = self.nodes[1].get_wallet_rpc("roundtest")
addr = w.getnewaddress(address_type="bech32")
self.nodes[0].sendtoaddress(addr, 1)
self.generate(self.nodes[0], 1)
# A P2WPKH input costs 68 vbytes; With a single P2WPKH output, the rest of the tx is 42 vbytes for a total of 110 vbytes.
# At a feerate of 1.85 sat/vb, the input will need a fee of 125.8 sats and the rest 77.7 sats
# The entire tx fee should be 203.5 sats.
# Coin selection rounds the fee individually instead of at the end (due to how CFeeRate::GetFee works).
# If rounding down (which is the incorrect behavior), then the calculated fee will be 125 + 77 = 202.
# If rounding up, then the calculated fee will be 126 + 78 = 204.
# In the former case, the calculated needed fee is higher than the actual fee being paid, so an assertion is reached
# To test this does not happen, we subtract 202 sats from the input value. If working correctly, this should
# fail with insufficient funds rather than bitcoind asserting.
rawtx = w.createrawtransaction(inputs=[], outputs=[{self.nodes[0].getnewaddress(address_type="bech32"): 1 - 0.00000202}])
assert_raises_rpc_error(-4, "Insufficient funds", w.fundrawtransaction, rawtx, fee_rate=1.85)
def test_input_confs_control(self):
self.nodes[0].createwallet("minconf")
wallet = self.nodes[0].get_wallet_rpc("minconf")
# Fund the wallet with different chain heights
for _ in range(2):
self.nodes[2].sendmany("", {wallet.getnewaddress():1, wallet.getnewaddress():1})
self.generate(self.nodes[2], 1)
unconfirmed_txid = wallet.sendtoaddress(wallet.getnewaddress(), 0.5)
self.log.info("Crafting TX using an unconfirmed input")
target_address = self.nodes[2].getnewaddress()
raw_tx1 = wallet.createrawtransaction([], {target_address: 0.1}, 0, True)
funded_tx1 = wallet.fundrawtransaction(raw_tx1, {'fee_rate': 1, 'maxconf': 0})['hex']
# Make sure we only had the one input
tx1_inputs = self.nodes[0].decoderawtransaction(funded_tx1)['vin']
assert_equal(len(tx1_inputs), 1)
utxo1 = tx1_inputs[0]
assert unconfirmed_txid == utxo1['txid']
final_tx1 = wallet.signrawtransactionwithwallet(funded_tx1)['hex']
txid1 = self.nodes[0].sendrawtransaction(final_tx1)
mempool = self.nodes[0].getrawmempool()
assert txid1 in mempool
self.log.info("Fail to craft a new TX with minconf above highest one")
# Create a replacement tx to 'final_tx1' that has 1 BTC target instead of 0.1.
raw_tx2 = wallet.createrawtransaction([{'txid': utxo1['txid'], 'vout': utxo1['vout']}], {target_address: 1})
assert_raises_rpc_error(-4, "Insufficient funds", wallet.fundrawtransaction, raw_tx2, {'add_inputs': True, 'minconf': 3, 'fee_rate': 10})
self.log.info("Fail to broadcast a new TX with maxconf 0 due to BIP125 rules to verify it actually chose unconfirmed outputs")
# Now fund 'raw_tx2' to fulfill the total target (1 BTC) by using all the wallet unconfirmed outputs.
# As it was created with the first unconfirmed output, 'raw_tx2' only has 0.1 BTC covered (need to fund 0.9 BTC more).
# So, the selection process, to cover the amount, will pick up the 'final_tx1' output as well, which is an output of the tx that this
# new tx is replacing!. So, once we send it to the mempool, it will return a "bad-txns-spends-conflicting-tx"
# because the input will no longer exist once the first tx gets replaced by this new one).
funded_invalid = wallet.fundrawtransaction(raw_tx2, {'add_inputs': True, 'maxconf': 0, 'fee_rate': 10})['hex']
final_invalid = wallet.signrawtransactionwithwallet(funded_invalid)['hex']
assert_raises_rpc_error(-26, "bad-txns-spends-conflicting-tx", self.nodes[0].sendrawtransaction, final_invalid)
self.log.info("Craft a replacement adding inputs with highest depth possible")
funded_tx2 = wallet.fundrawtransaction(raw_tx2, {'add_inputs': True, 'minconf': 2, 'fee_rate': 10})['hex']
tx2_inputs = self.nodes[0].decoderawtransaction(funded_tx2)['vin']
assert_greater_than_or_equal(len(tx2_inputs), 2)
for vin in tx2_inputs:
if vin['txid'] != unconfirmed_txid:
assert_greater_than_or_equal(self.nodes[0].gettxout(vin['txid'], vin['vout'])['confirmations'], 2)
final_tx2 = wallet.signrawtransactionwithwallet(funded_tx2)['hex']
txid2 = self.nodes[0].sendrawtransaction(final_tx2)
mempool = self.nodes[0].getrawmempool()
assert txid1 not in mempool
assert txid2 in mempool
wallet.unloadwallet()
if __name__ == '__main__':
RawTransactionsTest(__file__).main()