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Better txn_doublespend.py test

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Remove reliance on accounting "move" ledger entries.  Instead,
create funding transactions (and deal with fee complexities).

Do not rely on broken SyncMetaData.  Instead expect double-spend
amount to be debited from the default "" account.
pull/262/head
Tom Harding 10 years ago
parent b2b3619262
commit defd2d55b7
1 changed files with 52 additions and 27 deletions
Show Stats Download Patch File Download Diff File

79
qa/rpc-tests/txn_doublespend.py
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@ -4,7 +4,7 @@
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#
# Test proper accounting with malleable transactions
# Test proper accounting with a double-spend conflict
#
from test_framework import BitcoinTestFramework
@ -32,28 +32,40 @@ class TxnMallTest(BitcoinTestFramework):
self.nodes[i].getnewaddress("") # bug workaround, coins generated assigned to first getnewaddress!
# Assign coins to foo and bar accounts:
self.nodes[0].move("", "foo", 1220)
self.nodes[0].move("", "bar", 30)
assert_equal(self.nodes[0].getbalance(""), 0)
node0_address_foo = self.nodes[0].getnewaddress("foo")
fund_foo_txid = self.nodes[0].sendfrom("", node0_address_foo, 1219)
fund_foo_tx = self.nodes[0].gettransaction(fund_foo_txid)
node0_address_bar = self.nodes[0].getnewaddress("bar")
fund_bar_txid = self.nodes[0].sendfrom("", node0_address_bar, 29)
fund_bar_tx = self.nodes[0].gettransaction(fund_bar_txid)
assert_equal(self.nodes[0].getbalance(""),
starting_balance - 1219 - 29 + fund_foo_tx["fee"] + fund_bar_tx["fee"])
# Coins are sent to node1_address
node1_address = self.nodes[1].getnewaddress("from0")
# First: use raw transaction API to send 1210 BTC to node1_address,
# First: use raw transaction API to send 1240 BTC to node1_address,
# but don't broadcast:
(total_in, inputs) = gather_inputs(self.nodes[0], 1210)
change_address = self.nodes[0].getnewaddress("foo")
doublespend_fee = Decimal('-.02')
rawtx_input_0 = {}
rawtx_input_0["txid"] = fund_foo_txid
rawtx_input_0["vout"] = find_output(self.nodes[0], fund_foo_txid, 1219)
rawtx_input_1 = {}
rawtx_input_1["txid"] = fund_bar_txid
rawtx_input_1["vout"] = find_output(self.nodes[0], fund_bar_txid, 29)
inputs = [rawtx_input_0, rawtx_input_1]
change_address = self.nodes[0].getnewaddress()
outputs = {}
outputs[change_address] = 40
outputs[node1_address] = 1210
outputs[node1_address] = 1240
outputs[change_address] = 1248 - 1240 + doublespend_fee
rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
doublespend = self.nodes[0].signrawtransaction(rawtx)
assert_equal(doublespend["complete"], True)
# Create two transaction from node[0] to node[1]; the
# second must spend change from the first because the first
# spends all mature inputs:
txid1 = self.nodes[0].sendfrom("foo", node1_address, 1210, 0)
# Create two spends using 1 50 BTC coin each
txid1 = self.nodes[0].sendfrom("foo", node1_address, 40, 0)
txid2 = self.nodes[0].sendfrom("bar", node1_address, 20, 0)
# Have node0 mine a block:
@ -65,16 +77,16 @@ class TxnMallTest(BitcoinTestFramework):
tx2 = self.nodes[0].gettransaction(txid2)
# Node0's balance should be starting balance, plus 50BTC for another
# matured block, minus 1210, minus 20, and minus transaction fees:
expected = starting_balance
# matured block, minus 40, minus 20, and minus transaction fees:
expected = starting_balance + fund_foo_tx["fee"] + fund_bar_tx["fee"]
if self.options.mine_block: expected += 50
expected += tx1["amount"] + tx1["fee"]
expected += tx2["amount"] + tx2["fee"]
assert_equal(self.nodes[0].getbalance(), expected)
# foo and bar accounts should be debited:
assert_equal(self.nodes[0].getbalance("foo"), 1220+tx1["amount"]+tx1["fee"])
assert_equal(self.nodes[0].getbalance("bar"), 30+tx2["amount"]+tx2["fee"])
assert_equal(self.nodes[0].getbalance("foo", 0), 1219+tx1["amount"]+tx1["fee"])
assert_equal(self.nodes[0].getbalance("bar", 0), 29+tx2["amount"]+tx2["fee"])
if self.options.mine_block:
assert_equal(tx1["confirmations"], 1)
@ -85,8 +97,10 @@ class TxnMallTest(BitcoinTestFramework):
assert_equal(tx1["confirmations"], 0)
assert_equal(tx2["confirmations"], 0)
# Now give doublespend to miner:
mutated_txid = self.nodes[2].sendrawtransaction(doublespend["hex"])
# Now give doublespend and its parents to miner:
self.nodes[2].sendrawtransaction(fund_foo_tx["hex"])
self.nodes[2].sendrawtransaction(fund_bar_tx["hex"])
self.nodes[2].sendrawtransaction(doublespend["hex"])
# ... mine a block...
self.nodes[2].generate(1)
@ -104,17 +118,28 @@ class TxnMallTest(BitcoinTestFramework):
assert_equal(tx2["confirmations"], -1)
# Node0's total balance should be starting balance, plus 100BTC for
# two more matured blocks, minus 1210 for the double-spend:
expected = starting_balance + 100 - 1210
# two more matured blocks, minus 1240 for the double-spend, plus fees (which are
# negative):
expected = starting_balance + 100 - 1240 + fund_foo_tx["fee"] + fund_bar_tx["fee"] + doublespend_fee
assert_equal(self.nodes[0].getbalance(), expected)
assert_equal(self.nodes[0].getbalance("*"), expected)
# foo account should be debited, but bar account should not:
assert_equal(self.nodes[0].getbalance("foo"), 1220-1210)
assert_equal(self.nodes[0].getbalance("bar"), 30)
# Node1's "from" account balance should be just the mutated send:
assert_equal(self.nodes[1].getbalance("from0"), 1210)
# Final "" balance is starting_balance - amount moved to accounts - doublespend + subsidies +
# fees (which are negative)
assert_equal(self.nodes[0].getbalance("foo"), 1219)
assert_equal(self.nodes[0].getbalance("bar"), 29)
assert_equal(self.nodes[0].getbalance(""), starting_balance
-1219
- 29
-1240
+ 100
+ fund_foo_tx["fee"]
+ fund_bar_tx["fee"]
+ doublespend_fee)
# Node1's "from0" account balance should be just the doublespend:
assert_equal(self.nodes[1].getbalance("from0"), 1240)
if __name__ == '__main__':
TxnMallTest().main()

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