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Add test for max replacement limit

0.13
Suhas Daftuar 9 years ago committed by Peter Todd
parent
commit
20367d831f
  1. 48
      qa/replace-by-fee/rbf-tests.py

48
qa/replace-by-fee/rbf-tests.py

@ -307,5 +307,53 @@ class Test_ReplaceByFee(unittest.TestCase):
else: else:
self.fail() self.fail()
def test_too_many_replacements(self):
"""Replacements that evict too many transactions are rejected"""
# Try directly replacing more than MAX_REPLACEMENT_LIMIT
# transactions
# Start by creating a single transaction with many outputs
initial_nValue = 10*COIN
utxo = self.make_txout(initial_nValue)
fee = 0.0001*COIN
split_value = int((initial_nValue-fee)/(MAX_REPLACEMENT_LIMIT+1))
actual_fee = initial_nValue - split_value*(MAX_REPLACEMENT_LIMIT+1)
outputs = []
for i in range(MAX_REPLACEMENT_LIMIT+1):
outputs.append(CTxOut(split_value, CScript([1])))
splitting_tx = CTransaction([CTxIn(utxo, nSequence=0)], outputs)
txid = self.proxy.sendrawtransaction(splitting_tx, True)
# Now spend each of those outputs individually
for i in range(MAX_REPLACEMENT_LIMIT+1):
tx_i = CTransaction([CTxIn(COutPoint(txid, i), nSequence=0)],
[CTxOut(split_value-fee, CScript([b'a']))])
self.proxy.sendrawtransaction(tx_i, True)
# Now create doublespend of the whole lot, should fail
# Need a big enough fee to cover all spending transactions and have
# a higher fee rate
double_spend_value = (split_value-100*fee)*(MAX_REPLACEMENT_LIMIT+1)
inputs = []
for i in range(MAX_REPLACEMENT_LIMIT+1):
inputs.append(CTxIn(COutPoint(txid, i), nSequence=0))
double_tx = CTransaction(inputs, [CTxOut(double_spend_value, CScript([b'a']))])
try:
self.proxy.sendrawtransaction(double_tx, True)
except bitcoin.rpc.JSONRPCException as exp:
self.assertEqual(exp.error['code'], -26)
self.assertEqual("too many potential replacements" in exp.error['message'], True)
else:
self.fail()
# If we remove an input, it should pass
double_tx = CTransaction(inputs[0:-1],
[CTxOut(double_spend_value, CScript([b'a']))])
self.proxy.sendrawtransaction(double_tx, True)
if __name__ == '__main__': if __name__ == '__main__':
unittest.main() unittest.main()

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