test/functional/mempool_limit.py

   1 #!/usr/bin/env python3
   2 # Copyright (c) 2014-2017 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     def set_test_params(self):
  12         self.setup_clean_chain = True
  13         self.num_nodes = 1
  14         self.extra_args = [["-maxmempool=5", "-spendzeroconfchange=0"]]
  15
  16     def run_test(self):
  17         txouts = gen_return_txouts()
  18         relayfee = self.nodes[0].getnetworkinfo()['relayfee']
  19
  20         self.log.info('Check that mempoolminfee is minrelytxfee')
  21         assert_equal(self.nodes[0].getmempoolinfo()['minrelaytxfee'], Decimal('0.00001000'))
  22         assert_equal(self.nodes[0].getmempoolinfo()['mempoolminfee'], Decimal('0.00001000'))
  23
  24         txids = []
  25         utxos = create_confirmed_utxos(relayfee, self.nodes[0], 91)
  26
  27         self.log.info('Create a mempool tx that will be evicted')
  28         us0 = utxos.pop()
  29         inputs = [{ "txid" : us0["txid"], "vout" : us0["vout"]}]
  30         outputs = {self.nodes[0].getnewaddress() : 0.0001}
  31         tx = self.nodes[0].createrawtransaction(inputs, outputs)
  32         self.nodes[0].settxfee(relayfee) # specifically fund this tx with low fee
  33         txF = self.nodes[0].fundrawtransaction(tx)
  34         self.nodes[0].settxfee(0) # return to automatic fee selection
  35         txFS = self.nodes[0].signrawtransaction(txF['hex'])
  36         txid = self.nodes[0].sendrawtransaction(txFS['hex'])
  37
  38         relayfee = self.nodes[0].getnetworkinfo()['relayfee']
  39         base_fee = relayfee*100
  40         for i in range (3):
  41             txids.append([])
  42             txids[i] = create_lots_of_big_transactions(self.nodes[0], txouts, utxos[30*i:30*i+30], 30, (i+1)*base_fee)
  43
  44         self.log.info('The tx should be evicted by now')
  45         assert(txid not in self.nodes[0].getrawmempool())
  46         txdata = self.nodes[0].gettransaction(txid)
  47         assert(txdata['confirmations'] ==  0) #confirmation should still be 0
  48
  49         self.log.info('Check that mempoolminfee is larger than minrelytxfee')
  50         assert_equal(self.nodes[0].getmempoolinfo()['minrelaytxfee'], Decimal('0.00001000'))
  51         assert_greater_than(self.nodes[0].getmempoolinfo()['mempoolminfee'], Decimal('0.00001000'))
  52
  53 if __name__ == '__main__':
  54     MempoolLimitTest().main()