diff options
| -rwxr-xr-x | qa/replace-by-fee/rbf-tests.py | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/qa/replace-by-fee/rbf-tests.py b/qa/replace-by-fee/rbf-tests.py index b48748fb4b..60be905262 100755 --- a/qa/replace-by-fee/rbf-tests.py +++ b/qa/replace-by-fee/rbf-tests.py @@ -307,5 +307,53 @@ class Test_ReplaceByFee(unittest.TestCase): else: 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__': unittest.main() |