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#!/usr/bin/env python2
# Copyright (c) 2014-2015 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
# Test descendant package tracking code
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *
def satoshi_round(amount):
return Decimal(amount).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
class MempoolPackagesTest(BitcoinTestFramework):
def setup_network(self):
self.nodes = []
self.nodes.append(start_node(0, self.options.tmpdir, ["-maxorphantx=1000", "-relaypriority=0"]))
self.is_network_split = False
self.sync_all()
# Build a transaction that spends parent_txid:vout
# Return amount sent
def chain_transaction(self, parent_txid, vout, value, fee, num_outputs):
send_value = satoshi_round((value - fee)/num_outputs)
inputs = [ {'txid' : parent_txid, 'vout' : vout} ]
outputs = {}
for i in xrange(num_outputs):
outputs[self.nodes[0].getnewaddress()] = send_value
rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
signedtx = self.nodes[0].signrawtransaction(rawtx)
txid = self.nodes[0].sendrawtransaction(signedtx['hex'])
fulltx = self.nodes[0].getrawtransaction(txid, 1)
assert(len(fulltx['vout']) == num_outputs) # make sure we didn't generate a change output
return (txid, send_value)
def run_test(self):
''' Mine some blocks and have them mature. '''
self.nodes[0].generate(101)
utxo = self.nodes[0].listunspent(10)
txid = utxo[0]['txid']
vout = utxo[0]['vout']
value = utxo[0]['amount']
fee = Decimal("0.0001")
# 100 transactions off a confirmed tx should be fine
chain = []
for i in xrange(100):
(txid, sent_value) = self.chain_transaction(txid, 0, value, fee, 1)
value = sent_value
chain.append(txid)
# Check mempool has 100 transactions in it, and descendant
# count and fees should look correct
mempool = self.nodes[0].getrawmempool(True)
assert_equal(len(mempool), 100)
descendant_count = 1
descendant_fees = 0
descendant_size = 0
SATOSHIS = 100000000
for x in reversed(chain):
assert_equal(mempool[x]['descendantcount'], descendant_count)
descendant_fees += mempool[x]['fee']
assert_equal(mempool[x]['descendantfees'], SATOSHIS*descendant_fees)
descendant_size += mempool[x]['size']
assert_equal(mempool[x]['descendantsize'], descendant_size)
descendant_count += 1
# Adding one more transaction on to the chain should fail.
try:
self.chain_transaction(txid, vout, value, fee, 1)
except JSONRPCException as e:
print "too-long-ancestor-chain successfully rejected"
# TODO: test ancestor size limits
# Now test descendant chain limits
txid = utxo[1]['txid']
value = utxo[1]['amount']
vout = utxo[1]['vout']
transaction_package = []
# First create one parent tx with 10 children
(txid, sent_value) = self.chain_transaction(txid, vout, value, fee, 10)
parent_transaction = txid
for i in xrange(10):
transaction_package.append({'txid': txid, 'vout': i, 'amount': sent_value})
for i in xrange(1000):
utxo = transaction_package.pop(0)
try:
(txid, sent_value) = self.chain_transaction(utxo['txid'], utxo['vout'], utxo['amount'], fee, 10)
for j in xrange(10):
transaction_package.append({'txid': txid, 'vout': j, 'amount': sent_value})
if i == 998:
mempool = self.nodes[0].getrawmempool(True)
assert_equal(mempool[parent_transaction]['descendantcount'], 1000)
except JSONRPCException as e:
print e.error['message']
assert_equal(i, 999)
print "tx that would create too large descendant package successfully rejected"
# TODO: test descendant size limits
if __name__ == '__main__':
MempoolPackagesTest().main()
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