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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 mempool limiting together/eviction with the wallet
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import *
class MempoolLimitTest(BitcoinTestFramework):
def satoshi_round(self, amount):
return Decimal(amount).quantize(Decimal('0.00000001'), rounding=ROUND_DOWN)
def __init__(self):
# Some pre-processing to create a bunch of OP_RETURN txouts to insert into transactions we create
# So we have big transactions (and therefore can't fit very many into each block)
# create one script_pubkey
script_pubkey = "6a4d0200" #OP_RETURN OP_PUSH2 512 bytes
for i in xrange (512):
script_pubkey = script_pubkey + "01"
# concatenate 128 txouts of above script_pubkey which we'll insert before the txout for change
self.txouts = "81"
for k in xrange(128):
# add txout value
self.txouts = self.txouts + "0000000000000000"
# add length of script_pubkey
self.txouts = self.txouts + "fd0402"
# add script_pubkey
self.txouts = self.txouts + script_pubkey
def create_confirmed_utxos(self, count):
self.nodes[0].generate(int(0.5*90)+102)
utxos = self.nodes[0].listunspent()
iterations = count - len(utxos)
addr1 = self.nodes[0].getnewaddress()
addr2 = self.nodes[0].getnewaddress()
if iterations <= 0:
return utxos
for i in xrange(iterations):
t = utxos.pop()
fee = self.relayfee
inputs = []
inputs.append({ "txid" : t["txid"], "vout" : t["vout"]})
outputs = {}
send_value = t['amount'] - fee
outputs[addr1] = self.satoshi_round(send_value/2)
outputs[addr2] = self.satoshi_round(send_value/2)
raw_tx = self.nodes[0].createrawtransaction(inputs, outputs)
signed_tx = self.nodes[0].signrawtransaction(raw_tx)["hex"]
txid = self.nodes[0].sendrawtransaction(signed_tx)
while (self.nodes[0].getmempoolinfo()['size'] > 0):
self.nodes[0].generate(1)
utxos = self.nodes[0].listunspent()
assert(len(utxos) >= count)
return utxos
def create_lots_of_big_transactions(self, utxos, fee):
addr = self.nodes[0].getnewaddress()
txids = []
for i in xrange(len(utxos)):
t = utxos.pop()
inputs = []
inputs.append({ "txid" : t["txid"], "vout" : t["vout"]})
outputs = {}
send_value = t['amount'] - fee
outputs[addr] = self.satoshi_round(send_value)
rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
newtx = rawtx[0:92]
newtx = newtx + self.txouts
newtx = newtx + rawtx[94:]
signresult = self.nodes[0].signrawtransaction(newtx, None, None, "NONE")
txid = self.nodes[0].sendrawtransaction(signresult["hex"], True)
txids.append(txid)
return txids
def setup_network(self):
self.nodes = []
self.nodes.append(start_node(0, self.options.tmpdir, ["-maxmempool=5", "-spendzeroconfchange=0", "-debug"]))
self.nodes.append(start_node(1, self.options.tmpdir, []))
connect_nodes(self.nodes[0], 1)
self.is_network_split = False
self.sync_all()
self.relayfee = self.nodes[0].getnetworkinfo()['relayfee']
def setup_chain(self):
print("Initializing test directory "+self.options.tmpdir)
initialize_chain_clean(self.options.tmpdir, 2)
def run_test(self):
txids = []
utxos = self.create_confirmed_utxos(90)
#create a mempool tx that will be evicted
us0 = utxos.pop()
inputs = [{ "txid" : us0["txid"], "vout" : us0["vout"]}]
outputs = {self.nodes[1].getnewaddress() : 0.0001}
tx = self.nodes[0].createrawtransaction(inputs, outputs)
txF = self.nodes[0].fundrawtransaction(tx)
txFS = self.nodes[0].signrawtransaction(txF['hex'])
txid = self.nodes[0].sendrawtransaction(txFS['hex'])
self.nodes[0].lockunspent(True, [us0])
relayfee = self.nodes[0].getnetworkinfo()['relayfee']
base_fee = relayfee*100
for i in xrange (4):
txids.append([])
txids[i] = self.create_lots_of_big_transactions(utxos[30*i:30*i+30], (i+1)*base_fee)
# by now, the tx should be evicted, check confirmation state
assert(txid not in self.nodes[0].getrawmempool())
txdata = self.nodes[0].gettransaction(txid);
assert(txdata['confirmations'] == 0) #confirmation should still be 0
if __name__ == '__main__':
MempoolLimitTest().main()
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