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RPC: indicate which transactions are replaceable

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Add "bip125-replaceable" output field to listtransactions and gettransaction
which indicates if an unconfirmed transaction, or any unconfirmed parent, is
signaling opt-in RBF according to BIP 125.
This commit is contained in:
Suhas Daftuar
2015-12-16 14:57:54 -05:00
committed by Suhas Daftuar
parent f9fd4c2884
commit eaa8d2754b
5 changed files with 199 additions and 0 deletions
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109
qa/rpc-tests/listtransactions.py
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@@ -7,7 +7,15 @@
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *
from test_framework.mininode import CTransaction
import cStringIO
import binascii
def txFromHex(hexstring):
tx = CTransaction()
f = cStringIO.StringIO(binascii.unhexlify(hexstring))
tx.deserialize(f)
return tx
def check_array_result(object_array, to_match, expected):
"""
@@ -108,6 +116,107 @@ class ListTransactionsTest(BitcoinTestFramework):
{"category":"receive","amount":Decimal("0.1")},
{"txid":txid, "account" : "watchonly"} )
self.run_rbf_opt_in_test()
# Check that the opt-in-rbf flag works properly, for sent and received
# transactions.
def run_rbf_opt_in_test(self):
# Check whether a transaction signals opt-in RBF itself
def is_opt_in(node, txid):
rawtx = node.getrawtransaction(txid, 1)
for x in rawtx["vin"]:
if x["sequence"] < 0xfffffffe:
return True
return False
# Find an unconfirmed output matching a certain txid
def get_unconfirmed_utxo_entry(node, txid_to_match):
utxo = node.listunspent(0, 0)
for i in utxo:
if i["txid"] == txid_to_match:
return i
return None
# 1. Chain a few transactions that don't opt-in.
txid_1 = self.nodes[0].sendtoaddress(self.nodes[1].getnewaddress(), 1)
assert(not is_opt_in(self.nodes[0], txid_1))
check_array_result(self.nodes[0].listtransactions(), {"txid": txid_1}, {"bip125-replaceable":"no"})
sync_mempools(self.nodes)
check_array_result(self.nodes[1].listtransactions(), {"txid": txid_1}, {"bip125-replaceable":"no"})
# Tx2 will build off txid_1, still not opting in to RBF.
utxo_to_use = get_unconfirmed_utxo_entry(self.nodes[1], txid_1)
# Create tx2 using createrawtransaction
inputs = [{"txid":utxo_to_use["txid"], "vout":utxo_to_use["vout"]}]
outputs = {self.nodes[0].getnewaddress(): 0.999}
tx2 = self.nodes[1].createrawtransaction(inputs, outputs)
tx2_signed = self.nodes[1].signrawtransaction(tx2)["hex"]
txid_2 = self.nodes[1].sendrawtransaction(tx2_signed)
# ...and check the result
assert(not is_opt_in(self.nodes[1], txid_2))
check_array_result(self.nodes[1].listtransactions(), {"txid": txid_2}, {"bip125-replaceable":"no"})
sync_mempools(self.nodes)
check_array_result(self.nodes[0].listtransactions(), {"txid": txid_2}, {"bip125-replaceable":"no"})
# Tx3 will opt-in to RBF
utxo_to_use = get_unconfirmed_utxo_entry(self.nodes[0], txid_2)
inputs = [{"txid": txid_2, "vout":utxo_to_use["vout"]}]
outputs = {self.nodes[1].getnewaddress(): 0.998}
tx3 = self.nodes[0].createrawtransaction(inputs, outputs)
tx3_modified = txFromHex(tx3)
tx3_modified.vin[0].nSequence = 0
tx3 = binascii.hexlify(tx3_modified.serialize()).decode('utf-8')
tx3_signed = self.nodes[0].signrawtransaction(tx3)['hex']
txid_3 = self.nodes[0].sendrawtransaction(tx3_signed)
assert(is_opt_in(self.nodes[0], txid_3))
check_array_result(self.nodes[0].listtransactions(), {"txid": txid_3}, {"bip125-replaceable":"yes"})
sync_mempools(self.nodes)
check_array_result(self.nodes[1].listtransactions(), {"txid": txid_3}, {"bip125-replaceable":"yes"})
# Tx4 will chain off tx3. Doesn't signal itself, but depends on one
# that does.
utxo_to_use = get_unconfirmed_utxo_entry(self.nodes[1], txid_3)
inputs = [{"txid": txid_3, "vout":utxo_to_use["vout"]}]
outputs = {self.nodes[0].getnewaddress(): 0.997}
tx4 = self.nodes[1].createrawtransaction(inputs, outputs)
tx4_signed = self.nodes[1].signrawtransaction(tx4)["hex"]
txid_4 = self.nodes[1].sendrawtransaction(tx4_signed)
assert(not is_opt_in(self.nodes[1], txid_4))
check_array_result(self.nodes[1].listtransactions(), {"txid": txid_4}, {"bip125-replaceable":"yes"})
sync_mempools(self.nodes)
check_array_result(self.nodes[0].listtransactions(), {"txid": txid_4}, {"bip125-replaceable":"yes"})
# Replace tx3, and check that tx4 becomes unknown
tx3_b = tx3_modified
tx3_b.vout[0].nValue -= 0.004*100000000 # bump the fee
tx3_b = binascii.hexlify(tx3_b.serialize()).decode('utf-8')
tx3_b_signed = self.nodes[0].signrawtransaction(tx3_b)['hex']
txid_3b = self.nodes[0].sendrawtransaction(tx3_b_signed, True)
assert(is_opt_in(self.nodes[0], txid_3b))
check_array_result(self.nodes[0].listtransactions(), {"txid": txid_4}, {"bip125-replaceable":"unknown"})
sync_mempools(self.nodes)
check_array_result(self.nodes[1].listtransactions(), {"txid": txid_4}, {"bip125-replaceable":"unknown"})
# Check gettransaction as well:
for n in self.nodes[0:2]:
assert_equal(n.gettransaction(txid_1)["bip125-replaceable"], "no")
assert_equal(n.gettransaction(txid_2)["bip125-replaceable"], "no")
assert_equal(n.gettransaction(txid_3)["bip125-replaceable"], "yes")
assert_equal(n.gettransaction(txid_3b)["bip125-replaceable"], "yes")
assert_equal(n.gettransaction(txid_4)["bip125-replaceable"], "unknown")
# After mining a transaction, it's no longer BIP125-replaceable
self.nodes[0].generate(1)
assert(txid_3b not in self.nodes[0].getrawmempool())
assert_equal(self.nodes[0].gettransaction(txid_3b)["bip125-replaceable"], "no")
assert_equal(self.nodes[0].gettransaction(txid_4)["bip125-replaceable"], "unknown")
if __name__ == '__main__':
ListTransactionsTest().main()