dash/test/functional/wallet_create_tx.py

#!/usr/bin/env python3
# Copyright (c) 2018-2020 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
    assert_equal,
    assert_raises_rpc_error,
)


class CreateTxWalletTest(BitcoinTestFramework):
    def set_test_params(self):
        self.num_nodes = 1

    def skip_test_if_missing_module(self):
        self.skip_if_no_wallet()

    def run_test(self):
        self.test_anti_fee_sniping()
        self.test_tx_size_too_large()

    def test_anti_fee_sniping(self):
        self.log.info('Check that we have some (old) blocks and that anti-fee-sniping is disabled')
        self.bump_mocktime(8 * 60 * 60 + 1, update_schedulers=False)
        assert_equal(self.nodes[0].getblockchaininfo()['blocks'], 200)
        txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1)
        tx = self.nodes[0].decoderawtransaction(self.nodes[0].gettransaction(txid)['hex'])
        assert_equal(tx['locktime'], 0)

        self.log.info('Check that anti-fee-sniping is enabled when we mine a recent block')
        self.nodes[0].generate(1)
        txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1)
        tx = self.nodes[0].decoderawtransaction(self.nodes[0].gettransaction(txid)['hex'])
        assert 0 < tx['locktime'] <= 201

    def test_tx_size_too_large(self):
        # More than 10kB of outputs, so that we hit -maxtxfee with a high feerate
        outputs = {self.nodes[0].getnewaddress(): 0.000025 for _ in range(400)}
        raw_tx = self.nodes[0].createrawtransaction(inputs=[], outputs=outputs)

        for fee_setting in ['-minrelaytxfee=0.01', '-mintxfee=0.01', '-paytxfee=0.01']:
            self.log.info('Check maxtxfee in combination with {}'.format(fee_setting))
            self.restart_node(0, extra_args=[fee_setting])
            assert_raises_rpc_error(
                -6,
                "Fee exceeds maximum configured by user (e.g. -maxtxfee, maxfeerate)",
                lambda: self.nodes[0].sendmany(dummy="", amounts=outputs),
            )
            assert_raises_rpc_error(
                -4,
                "Fee exceeds maximum configured by user (e.g. -maxtxfee, maxfeerate)",
                lambda: self.nodes[0].fundrawtransaction(hexstring=raw_tx),
            )

        self.log.info('Check maxtxfee in combination with settxfee')
        self.restart_node(0)
        self.nodes[0].settxfee(0.01)
        assert_raises_rpc_error(
            -6,
            "Fee exceeds maximum configured by user (e.g. -maxtxfee, maxfeerate)",
            lambda: self.nodes[0].sendmany(dummy="", amounts=outputs),
        )
        assert_raises_rpc_error(
            -4,
            "Fee exceeds maximum configured by user (e.g. -maxtxfee, maxfeerate)",
            lambda: self.nodes[0].fundrawtransaction(hexstring=raw_tx),
        )
        self.nodes[0].settxfee(0)


if __name__ == '__main__':
    CreateTxWalletTest().main()