def test_independent(self):
self.log.info("Test multiple independent transactions in a package")
node = self.nodes[0]
# For independent transactions, order doesn't matter.
self.assert_testres_equal(self.independent_txns_hex, self.independent_txns_testres)
self.log.info("Test an otherwise valid package with an extra garbage tx appended")
garbage_tx = node.createrawtransaction([{"txid": "00" * 32, "vout": 5}], {self.address: 1})
tx = CTransaction()
tx.deserialize(BytesIO(hex_str_to_bytes(garbage_tx)))
# Only the txid and wtxids are returned because validation is incomplete for the independent txns.
# Package validation is atomic: if the node cannot find a UTXO for any single tx in the package,
# it terminates immediately to avoid unnecessary, expensive signature verification.
package_bad = self.independent_txns_hex + [garbage_tx]
testres_bad = self.independent_txns_testres_blank + [{"txid": tx.rehash(), "wtxid": tx.getwtxid(), "allowed": False, "reject-reason": "missing-inputs"}]
self.assert_testres_equal(package_bad, testres_bad)
self.log.info("Check testmempoolaccept tells us when some transactions completed validation successfully")
coin = self.coins.pop()
tx_bad_sig_hex = node.createrawtransaction([{"txid": coin["txid"], "vout": 0}],
{self.address : coin["amount"] - Decimal("0.0001")})
tx_bad_sig = CTransaction()
tx_bad_sig.deserialize(BytesIO(hex_str_to_bytes(tx_bad_sig_hex)))
testres_bad_sig = node.testmempoolaccept(self.independent_txns_hex + [tx_bad_sig_hex])
# By the time the signature for the last transaction is checked, all the other transactions
# have been fully validated, which is why the node returns full validation results for all
# transactions here but empty results in other cases.
assert_equal(testres_bad_sig, self.independent_txns_testres + [{
"txid": tx_bad_sig.rehash(),
"wtxid": tx_bad_sig.getwtxid(), "allowed": False,
"reject-reason": "mandatory-script-verify-flag-failed (Operation not valid with the current stack size)"
}])
self.log.info("Check testmempoolaccept reports txns in packages that exceed max feerate")
coin = self.coins.pop()
tx_high_fee_raw = node.createrawtransaction([{"txid": coin["txid"], "vout": 0}],
{self.address : coin["amount"] - Decimal("0.999")})
tx_high_fee_signed = node.signrawtransactionwithkey(hexstring=tx_high_fee_raw, privkeys=self.privkeys)
assert tx_high_fee_signed["complete"]
tx_high_fee = CTransaction()
tx_high_fee.deserialize(BytesIO(hex_str_to_bytes(tx_high_fee_signed["hex"])))
testres_high_fee = node.testmempoolaccept([tx_high_fee_signed["hex"]])
assert_equal(testres_high_fee, [
{"txid": tx_high_fee.rehash(), "wtxid": tx_high_fee.getwtxid(), "allowed": False, "reject-reason": "max-fee-exceeded"}
])
package_high_fee = [tx_high_fee_signed["hex"]] + self.independent_txns_hex
testres_package_high_fee = node.testmempoolaccept(package_high_fee)
assert_equal(testres_package_high_fee, testres_high_fee + self.independent_txns_testres_blank)
def test_conflicting(self):
node = self.nodes[0]
prevtx = self.coins.pop()
inputs = [{"txid": prevtx["txid"], "vout": 0}]
output1 = {node.get_deterministic_priv_key().address: 50 - 0.00125}
output2 = {ADDRESS_BCRT1_P2WSH_OP_TRUE: 50 - 0.00125}
# tx1 and tx2 share the same inputs
rawtx1 = node.createrawtransaction(inputs, output1)
rawtx2 = node.createrawtransaction(inputs, output2)
signedtx1 = node.signrawtransactionwithkey(hexstring=rawtx1,
privkeys=self.privkeys)
signedtx2 = node.signrawtransactionwithkey(hexstring=rawtx2,
privkeys=self.privkeys)
tx1 = CTransaction()
tx1.deserialize(BytesIO(hex_str_to_bytes(signedtx1["hex"])))
tx2 = CTransaction()
tx2.deserialize(BytesIO(hex_str_to_bytes(signedtx2["hex"])))
assert signedtx1["complete"]
assert signedtx2["complete"]
# Ensure tx1 and tx2 are valid by themselves
assert node.testmempoolaccept([signedtx1["hex"]])[0]["allowed"]
assert node.testmempoolaccept([signedtx2["hex"]])[0]["allowed"]
self.log.info("Test duplicate transactions in the same package")
testres = node.testmempoolaccept([signedtx1["hex"], signedtx1["hex"]])
assert_equal(testres, [{
"txid": tx1.rehash(),
"wtxid": tx1.getwtxid(),
"package-error": "conflict-in-package"
}, {
"txid": tx1.rehash(),
"wtxid": tx1.getwtxid(),
"package-error": "conflict-in-package"
}])
self.log.info("Test conflicting transactions in the same package")
testres = node.testmempoolaccept([signedtx1["hex"], signedtx2["hex"]])
assert_equal(testres, [{
"txid": tx1.rehash(),
"wtxid": tx1.getwtxid(),
"package-error": "conflict-in-package"
}, {
"txid": tx2.rehash(),
"wtxid": tx2.getwtxid(),
"package-error": "conflict-in-package"
}])
def create_self_transfer(self,
*,
fee_rate=Decimal("0.003"),
from_node=None,
utxo_to_spend=None,
mempool_valid=True,
locktime=0,
sequence=0):
"""Create and return a tx with the specified fee_rate. Fee may be exact or at most one satoshi higher than needed.
Checking mempool validity via the testmempoolaccept RPC can be skipped by setting mempool_valid to False."""
from_node = from_node or self._test_node
utxo_to_spend = utxo_to_spend or self.get_utxo()
if self._priv_key is None:
vsize = Decimal(104) # anyone-can-spend
else:
vsize = Decimal(
168
) # P2PK (73 bytes scriptSig + 35 bytes scriptPubKey + 60 bytes other)
send_value = int(COIN * (utxo_to_spend['value'] - fee_rate *
(vsize / 1000)))
assert send_value > 0
tx = CTransaction()
tx.vin = [
CTxIn(COutPoint(int(utxo_to_spend['txid'], 16),
utxo_to_spend['vout']),
nSequence=sequence)
]
tx.vout = [CTxOut(send_value, self._scriptPubKey)]
tx.nLockTime = locktime
if not self._address:
# raw script
if self._priv_key is not None:
# P2PK, need to sign
self.sign_tx(tx)
else:
# anyone-can-spend
tx.vin[0].scriptSig = CScript([OP_NOP] *
43) # pad to identical size
else:
tx.wit.vtxinwit = [CTxInWitness()]
tx.wit.vtxinwit[0].scriptWitness.stack = [
CScript([OP_TRUE]),
bytes([LEAF_VERSION_TAPSCRIPT]) + self._internal_key
]
tx_hex = tx.serialize().hex()
if mempool_valid:
tx_info = from_node.testmempoolaccept([tx_hex])[0]
assert_equal(tx_info['allowed'], True)
assert_equal(tx_info['vsize'], vsize)
assert_equal(tx_info['fees']['base'],
utxo_to_spend['value'] - Decimal(send_value) / COIN)
return {
'txid': tx.rehash(),
'wtxid': tx.getwtxid(),
'hex': tx_hex,
'tx': tx
}
def test_rbf(self):
node = self.nodes[0]
coin = self.coins.pop()
inputs = [{"txid": coin["txid"], "vout": 0, "sequence": BIP125_SEQUENCE_NUMBER}]
fee = Decimal('0.00125000')
output = {node.get_deterministic_priv_key().address: 50 - fee}
raw_replaceable_tx = node.createrawtransaction(inputs, output)
signed_replaceable_tx = node.signrawtransactionwithkey(hexstring=raw_replaceable_tx, privkeys=self.privkeys)
testres_replaceable = node.testmempoolaccept([signed_replaceable_tx["hex"]])
replaceable_tx = CTransaction()
replaceable_tx.deserialize(BytesIO(hex_str_to_bytes(signed_replaceable_tx["hex"])))
assert_equal(testres_replaceable, [
{"txid": replaceable_tx.rehash(), "wtxid": replaceable_tx.getwtxid(),
"allowed": True, "vsize": replaceable_tx.get_vsize(), "fees": { "base": fee }}
])
# Replacement transaction is identical except has double the fee
replacement_tx = CTransaction()
replacement_tx.deserialize(BytesIO(hex_str_to_bytes(signed_replaceable_tx["hex"])))
replacement_tx.vout[0].nValue -= int(fee * COIN) # Doubled fee
signed_replacement_tx = node.signrawtransactionwithkey(replacement_tx.serialize().hex(), self.privkeys)
replacement_tx.deserialize(BytesIO(hex_str_to_bytes(signed_replacement_tx["hex"])))
self.log.info("Test that transactions within a package cannot replace each other")
testres_rbf_conflicting = node.testmempoolaccept([signed_replaceable_tx["hex"], signed_replacement_tx["hex"]])
assert_equal(testres_rbf_conflicting, [
{"txid": replaceable_tx.rehash(), "wtxid": replaceable_tx.getwtxid(), "package-error": "conflict-in-package"},
{"txid": replacement_tx.rehash(), "wtxid": replacement_tx.getwtxid(), "package-error": "conflict-in-package"}
])
self.log.info("Test that packages cannot conflict with mempool transactions, even if a valid BIP125 RBF")
node.sendrawtransaction(signed_replaceable_tx["hex"])
testres_rbf_single = node.testmempoolaccept([signed_replacement_tx["hex"]])
# This transaction is a valid BIP125 replace-by-fee
assert testres_rbf_single[0]["allowed"]
testres_rbf_package = self.independent_txns_testres_blank + [{
"txid": replacement_tx.rehash(), "wtxid": replacement_tx.getwtxid(), "allowed": False, "reject-reason": "txn-mempool-conflict"
}]
self.assert_testres_equal(self.independent_txns_hex + [signed_replacement_tx["hex"]], testres_rbf_package)
def create_self_transfer(self, *, fee_rate=Decimal("0.003"), fee=Decimal("0"), utxo_to_spend=None, locktime=0, sequence=0, target_weight=0):
"""Create and return a tx with the specified fee. If fee is 0, use fee_rate, where the resulting fee may be exact or at most one satoshi higher than needed."""
utxo_to_spend = utxo_to_spend or self.get_utxo()
assert fee_rate >= 0
assert fee >= 0
if self._mode in (MiniWalletMode.RAW_OP_TRUE, MiniWalletMode.ADDRESS_OP_TRUE):
vsize = Decimal(104) # anyone-can-spend
elif self._mode == MiniWalletMode.RAW_P2PK:
vsize = Decimal(168) # P2PK (73 bytes scriptSig + 35 bytes scriptPubKey + 60 bytes other)
else:
assert False
send_value = utxo_to_spend["value"] - (fee or (fee_rate * vsize / 1000))
assert send_value > 0
tx = CTransaction()
tx.vin = [CTxIn(COutPoint(int(utxo_to_spend['txid'], 16), utxo_to_spend['vout']), nSequence=sequence)]
tx.vout = [CTxOut(int(COIN * send_value), bytearray(self._scriptPubKey))]
tx.nLockTime = locktime
if self._mode == MiniWalletMode.RAW_P2PK:
self.sign_tx(tx)
elif self._mode == MiniWalletMode.RAW_OP_TRUE:
tx.vin[0].scriptSig = CScript([OP_NOP] * 43) # pad to identical size
elif self._mode == MiniWalletMode.ADDRESS_OP_TRUE:
tx.wit.vtxinwit = [CTxInWitness()]
tx.wit.vtxinwit[0].scriptWitness.stack = [CScript([OP_TRUE]), bytes([LEAF_VERSION_TAPSCRIPT]) + self._internal_key]
else:
assert False
assert_equal(tx.get_vsize(), vsize)
if target_weight:
self._bulk_tx(tx, target_weight)
tx_hex = tx.serialize().hex()
new_utxo = self._create_utxo(txid=tx.rehash(), vout=0, value=send_value, height=0)
return {"txid": new_utxo["txid"], "wtxid": tx.getwtxid(), "hex": tx_hex, "tx": tx, "new_utxo": new_utxo}
def run_test(self):
node = self.nodes[0]
self.log.info('Start with empty mempool and 101 blocks')
# The last 100 coinbase transactions are premature
blockhash = node.generate(101)[0]
txid = node.getblock(blockhash=blockhash, verbosity=2)["tx"][0]["txid"]
assert_equal(node.getmempoolinfo()['size'], 0)
self.log.info("Submit parent with multiple script branches to mempool")
hashlock = hash160(b'Preimage')
witness_script = CScript([
OP_IF, OP_HASH160, hashlock, OP_EQUAL, OP_ELSE, OP_TRUE, OP_ENDIF
])
witness_program = sha256(witness_script)
script_pubkey = CScript([OP_0, witness_program])
parent = CTransaction()
parent.vin.append(CTxIn(COutPoint(int(txid, 16), 0), b""))
parent.vout.append(CTxOut(int(9.99998 * COIN), script_pubkey))
parent.rehash()
privkeys = [node.get_deterministic_priv_key().key]
raw_parent = node.signrawtransactionwithkey(
hexstring=parent.serialize().hex(), privkeys=privkeys)['hex']
parent_txid = node.sendrawtransaction(hexstring=raw_parent,
maxfeerate=0)
node.generate(1)
peer_wtxid_relay = node.add_p2p_connection(P2PTxInvStore())
# Create a new transaction with witness solving first branch
child_witness_script = CScript([OP_TRUE])
child_witness_program = sha256(child_witness_script)
child_script_pubkey = CScript([OP_0, child_witness_program])
child_one = CTransaction()
child_one.vin.append(CTxIn(COutPoint(int(parent_txid, 16), 0), b""))
child_one.vout.append(CTxOut(int(9.99996 * COIN), child_script_pubkey))
child_one.wit.vtxinwit.append(CTxInWitness())
child_one.wit.vtxinwit[0].scriptWitness.stack = [
b'Preimage', b'\x01', witness_script
]
child_one_wtxid = child_one.getwtxid()
child_one_txid = child_one.rehash()
# Create another identical transaction with witness solving second branch
child_two = deepcopy(child_one)
child_two.wit.vtxinwit[0].scriptWitness.stack = [b'', witness_script]
child_two_wtxid = child_two.getwtxid()
child_two_txid = child_two.rehash()
assert_equal(child_one_txid, child_two_txid)
assert child_one_wtxid != child_two_wtxid
self.log.info("Submit child_one to the mempool")
txid_submitted = node.sendrawtransaction(child_one.serialize().hex())
assert_equal(
node.getrawmempool(True)[txid_submitted]['wtxid'], child_one_wtxid)
peer_wtxid_relay.wait_for_broadcast([child_one_wtxid])
assert_equal(node.getmempoolinfo()["unbroadcastcount"], 0)
# testmempoolaccept reports the "already in mempool" error
assert_equal(node.testmempoolaccept([child_one.serialize().hex()]),
[{
"txid": child_one_txid,
"wtxid": child_one_wtxid,
"allowed": False,
"reject-reason": "txn-already-in-mempool"
}])
assert_equal(
node.testmempoolaccept([child_two.serialize().hex()])[0], {
"txid": child_two_txid,
"wtxid": child_two_wtxid,
"allowed": False,
"reject-reason": "txn-same-nonwitness-data-in-mempool"
})
# sendrawtransaction will not throw but quits early when the exact same transaction is already in mempool
node.sendrawtransaction(child_one.serialize().hex())
self.log.info("Connect another peer that hasn't seen child_one before")
peer_wtxid_relay_2 = node.add_p2p_connection(P2PTxInvStore())
self.log.info("Submit child_two to the mempool")
# sendrawtransaction will not throw but quits early when a transaction with the same non-witness data is already in mempool
node.sendrawtransaction(child_two.serialize().hex())
# The node should rebroadcast the transaction using the wtxid of the correct transaction
# (child_one, which is in its mempool).
peer_wtxid_relay_2.wait_for_broadcast([child_one_wtxid])
assert_equal(node.getmempoolinfo()["unbroadcastcount"], 0)
