test/functional/mempool_limit.py

   1 #!/usr/bin/env python3
   2 # Copyright (c) 2014-2016 The Bitcoin Core developers
   3 # Distributed under the MIT software license, see the accompanying
   4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5 """Test mempool limiting together/eviction with the wallet."""
   6
   7 from test_framework.test_framework import BitcoinTestFramework
   8 from test_framework.util import *
   9
  10 class MempoolLimitTest(BitcoinTestFramework):
  11
  12     def __init__(self):
  13         super().__init__()
  14         self.setup_clean_chain = True
  15         self.num_nodes = 1
  16         self.extra_args = [["-maxmempool=5", "-spendzeroconfchange=0"]]
  17
  18     def run_test(self):
  19         txouts = gen_return_txouts()
  20         relayfee = self.nodes[0].getnetworkinfo()['relayfee']
  21
  22         txids = []
  23         utxos = create_confirmed_utxos(relayfee, self.nodes[0], 91)
  24
  25         #create a mempool tx that will be evicted
  26         us0 = utxos.pop()
  27         inputs = [{ "txid" : us0["txid"], "vout" : us0["vout"]}]
  28         outputs = {self.nodes[0].getnewaddress() : 0.0001}
  29         tx = self.nodes[0].createrawtransaction(inputs, outputs)
  30         self.nodes[0].settxfee(relayfee) # specifically fund this tx with low fee
  31         txF = self.nodes[0].fundrawtransaction(tx)
  32         self.nodes[0].settxfee(0) # return to automatic fee selection
  33         txFS = self.nodes[0].signrawtransaction(txF['hex'])
  34         txid = self.nodes[0].sendrawtransaction(txFS['hex'])
  35
  36         relayfee = self.nodes[0].getnetworkinfo()['relayfee']
  37         base_fee = relayfee*100
  38         for i in range (3):
  39             txids.append([])
  40             txids[i] = create_lots_of_big_transactions(self.nodes[0], txouts, utxos[30*i:30*i+30], 30, (i+1)*base_fee)
  41
  42         # by now, the tx should be evicted, check confirmation state
  43         assert(txid not in self.nodes[0].getrawmempool())
  44         txdata = self.nodes[0].gettransaction(txid)
  45         assert(txdata['confirmations'] ==  0) #confirmation should still be 0
  46
  47 if __name__ == '__main__':
  48     MempoolLimitTest().main()