e90e8e5cba
Create feelimit.py test to verify the updated fee values now rounding has been eliminated.
78 lines
2.9 KiB
Python
78 lines
2.9 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) 2021 The Dogecoin 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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"""Fee limit QA test.
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# Tests nodes under fee limit, verifies fee rounding
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"""
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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from decimal import Decimal
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class FeeLimitTest(BitcoinTestFramework):
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def __init__(self):
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super().__init__()
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self.setup_clean_chain = True
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self.num_nodes = 2
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def setup_network(self, split=False):
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self.nodes = []
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self.nodes.append(start_node(0, self.options.tmpdir, []))
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self.nodes.append(start_node(1, self.options.tmpdir, []))
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connect_nodes_bi(self.nodes,0,1)
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self.is_network_split=False
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self.sync_all()
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def run_test(self):
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# mine some blocks
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self.nodes[0].generate(101)
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self.sync_all()
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# Output address
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addr_to = self.nodes[1].getnewaddress()
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lower_fee_per_kb = Decimal("0.001")
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# Force generating a transaction with 1.14.5-like fees by manually building the tx
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utx = self.nodes[0].listunspent()[0]
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inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']}]
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outputs = { addr_to : utx['amount'] - Decimal("1.0") }
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rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
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# Work out how big this transaction would be, then change the output to match
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tx_size = count_bytes(self.nodes[0].signrawtransaction(rawtx)['hex'])
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fee = lower_fee_per_kb * (tx_size + 1) / Decimal("1000")
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outputs = { addr_to : utx['amount'] - fee }
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rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
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signedtx = self.nodes[0].signrawtransaction(rawtx)
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self.nodes[0].sendrawtransaction(signedtx["hex"])
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# Sync all of the nodes
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self.sync_all()
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# Check if the TX made it to node 2
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assert_equal(self.nodes[1].getmempoolinfo()['size'], 1)
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assert_equal(self.nodes[0].getmempoolinfo()['size'], 1)
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# Force generating a transaction with fees which are too low to relay
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too_low_fee = lower_fee_per_kb * (tx_size - 4) / Decimal("1000")
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utx = self.nodes[0].listunspent()[0]
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inputs = [ {'txid' : utx['txid'], 'vout' : utx['vout']}]
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outputs = { self.nodes[1].getnewaddress() : utx['amount'] - too_low_fee }
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rawtx = self.nodes[0].createrawtransaction(inputs, outputs)
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signedtx = self.nodes[0].signrawtransaction(rawtx)
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self.nodes[0].sendrawtransaction(signedtx["hex"])
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# wait 10 seconds to sync mempools
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time.sleep(10)
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# Check the TX did not relay, so is only on node 0
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assert_equal(self.nodes[1].getmempoolinfo()['size'], 1)
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assert_equal(self.nodes[0].getmempoolinfo()['size'], 2)
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if __name__ == '__main__':
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FeeLimitTest().main()
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