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rpc: combinerawtransaction now rejects unmergeable transactions

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Previously, combinerawtransaction would silently return the first tx when
asked to combine unrelated txs. Now, it will check tx mergeability and
throws a descriptive error if tx cannot be merged.
This commit is contained in:
Adam Andrews
2024-11-15 10:32:35 -08:00
parent a7bea426b4
commit 6d86184a8b
2 changed files with 53 additions and 6 deletions
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36
test/functional/rpc_createmultisig.py
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@@ -50,6 +50,7 @@ class RpcCreateMultiSigTest(BitcoinTestFramework):
for output_type in ["bech32", "p2sh-segwit", "legacy"]:
self.do_multisig(keys, sigs, output_type)
self.test_combinerawtransaction_preconditions()
self.test_multisig_script_limit()
self.test_mixing_uncompressed_and_compressed_keys(node0)
self.test_sortedmulti_descriptors_bip67()
@@ -82,7 +83,12 @@ class RpcCreateMultiSigTest(BitcoinTestFramework):
assert_raises_rpc_error(-8, "Number of keys involved in the multisignature address creation > 20", node1.createmultisig, 16, self.pub, 'p2sh-segwit')
assert_raises_rpc_error(-8, "Number of keys involved in the multisignature address creation > 20", node1.createmultisig, 16, self.pub, 'bech32')
def do_multisig(self, nkeys, nsigs, output_type):
def test_combinerawtransaction_preconditions(self):
self.log.info('Test combinerawtransaction preconditions')
# Note that preconditions don't depend on the output type, choosing bech32
self.do_multisig(nkeys=3, nsigs=2, output_type="bech32", assert_mergeability=True)
def do_multisig(self, nkeys, nsigs, output_type, assert_mergeability=False):
node0, _node1, node2 = self.nodes
pub_keys = self.pub[0: nkeys]
priv_keys = self.priv[0: nkeys]
@@ -146,10 +152,32 @@ class RpcCreateMultiSigTest(BitcoinTestFramework):
assert_equal(rawtx2["complete"], False)
rawtx3 = node2.signrawtransactionwithkey(rawtx, [priv_keys[-1]], prevtxs)
assert_equal(rawtx3["complete"], False)
assert_raises_rpc_error(-22, "TX decode failed", node2.combinerawtransaction, [rawtx2['hex'], rawtx3['hex'] + "00"])
assert_raises_rpc_error(-22, "Missing transactions", node2.combinerawtransaction, [])
combined_rawtx = node2.combinerawtransaction([rawtx2["hex"], rawtx3["hex"]])
if assert_mergeability:
# Test boundary conditions
assert_raises_rpc_error(-22, "TX decode failed", node2.combinerawtransaction, [rawtx2['hex'], rawtx3['hex'] + "00"])
assert_raises_rpc_error(-22, "Missing transactions. At least two transactions required.", node2.combinerawtransaction, [])
assert_raises_rpc_error(-22, "Missing transactions. At least two transactions required.", node2.combinerawtransaction, [rawtx2['hex']])
out_addr2 = getnewdestination('bech32')[2]
unmergeable_transaction_args = [
([[{"txid": tx["txid"], "vout": tx["sent_vout"]}], [{out_addr: outval * 2}]], {}), # similar transaction but with different amount to send
([[{"txid": tx["txid"], "vout": tx["sent_vout"]}], [{out_addr: outval}]], {"version": 1}), # similar transaction but with different version
([[{"txid": tx["txid"], "vout": tx["sent_vout"]}], [{out_addr: outval}]], {"locktime": 1}), # similar transaction but with different locktime
([[{"txid": tx["txid"], "vout": tx["sent_vout"]}], [{out_addr2: outval}]], {}), # similar transaction but with different output address (scriptPubKey)
([[{"txid": tx["txid"], "vout": tx["sent_vout"], "sequence": 1}], [{out_addr: outval}]], {}), # similar transaction but with different sequence number
([[{"txid": tx["txid"], "vout": tx["sent_vout"] + 1}], [{out_addr: outval}]], {}) # similar transaction but with different input vout index
]
for rpc_args, rpc_kwargs in unmergeable_transaction_args:
unrelated_tx = node2.createrawtransaction(*rpc_args, **rpc_kwargs)
assert_raises_rpc_error(-8, "Transaction number 2 not compatible with first transaction", node0.combinerawtransaction, [rawtx2['hex'], unrelated_tx])
# Accept duplicate transactions in combinerawtransaction
dupe_merged_tx = node2.combinerawtransaction([rawtx2['hex'], rawtx2['hex']])
assert_equal(rawtx2['hex'], dupe_merged_tx)
combined_rawtx = node2.combinerawtransaction([rawtx2["hex"], rawtx3["hex"]])
tx = node0.sendrawtransaction(combined_rawtx, 0)
blk = self.generate(node0, 1)[0]
assert tx in node0.getblock(blk)["tx"]