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#!/usr/bin/env python2
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# Copyright (c) 2014-2015 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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# Test mempool limiting together/eviction with the wallet
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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class MempoolLimitTest(BitcoinTestFramework):
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def __init__(self):
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# Some pre-processing to create a bunch of OP_RETURN txouts to insert into transactions we create
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# So we have big transactions (and therefore can't fit very many into each block)
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# create one script_pubkey
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script_pubkey = "6a4d0200" #OP_RETURN OP_PUSH2 512 bytes
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for i in xrange (512):
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script_pubkey = script_pubkey + "01"
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# concatenate 128 txouts of above script_pubkey which we'll insert before the txout for change
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self.txouts = "81"
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for k in xrange(128):
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# add txout value
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self.txouts = self.txouts + "0000000000000000"
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# add length of script_pubkey
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self.txouts = self.txouts + "fd0402"
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# add script_pubkey
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self.txouts = self.txouts + script_pubkey
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def setup_network(self):
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self.nodes = []
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self.nodes.append(start_node(0, self.options.tmpdir, ["-maxmempool=5", "-spendzeroconfchange=0", "-debug"]))
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self.is_network_split = False
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self.sync_all()
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self.relayfee = self.nodes[0].getnetworkinfo()['relayfee']
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def setup_chain(self):
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print("Initializing test directory "+self.options.tmpdir)
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initialize_chain_clean(self.options.tmpdir, 2)
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def run_test(self):
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txids = []
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utxos = create_confirmed_utxos(self.relayfee, self.nodes[0], 90)
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#create a mempool tx that will be evicted
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us0 = utxos.pop()
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inputs = [{ "txid" : us0["txid"], "vout" : us0["vout"]}]
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outputs = {self.nodes[0].getnewaddress() : 0.0001}
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tx = self.nodes[0].createrawtransaction(inputs, outputs)
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txF = self.nodes[0].fundrawtransaction(tx)
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txFS = self.nodes[0].signrawtransaction(txF['hex'])
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txid = self.nodes[0].sendrawtransaction(txFS['hex'])
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self.nodes[0].lockunspent(True, [us0])
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relayfee = self.nodes[0].getnetworkinfo()['relayfee']
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base_fee = relayfee*100
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for i in xrange (4):
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txids.append([])
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txids[i] = create_lots_of_big_transactions(self.nodes[0], self.txouts, utxos[30*i:30*i+30], (i+1)*base_fee)
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# by now, the tx should be evicted, check confirmation state
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assert(txid not in self.nodes[0].getrawmempool())
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txdata = self.nodes[0].gettransaction(txid);
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assert(txdata['confirmations'] == 0) #confirmation should still be 0
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if __name__ == '__main__':
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MempoolLimitTest().main()
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