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[wallet] abort when attempting to fund a transaction above maxtxfee

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FundTransaction calls GetMinimumFee which, when the fee rate is absurdly high, quietly reduced the fee to -maxtxfee. Becaue an absurdly high fee rate is usually the result of a fat finger, aborting seems safer behavior.
This commit is contained in:
Sjors Provoost
2019-06-28 22:44:38 -04:00
parent 7400135b79
commit 806b0052c3
10 changed files with 27 additions and 13 deletions
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10
test/functional/rpc_psbt.py
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@ -9,6 +9,7 @@ from decimal import Decimal
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
assert_greater_than,
assert_raises_rpc_error,
connect_nodes_bi,
disconnect_nodes,
@ -129,6 +130,15 @@ class PSBTTest(BitcoinTestFramework):
assert_equal(walletprocesspsbt_out['complete'], True)
self.nodes[1].sendrawtransaction(self.nodes[1].finalizepsbt(walletprocesspsbt_out['psbt'])['hex'])
# feeRate of 0.1 BTC / KB produces a total fee slightly below -maxtxfee (~0.05280000):
res = self.nodes[1].walletcreatefundedpsbt([{"txid":txid,"vout":p2wpkh_pos},{"txid":txid,"vout":p2sh_p2wpkh_pos},{"txid":txid,"vout":p2pkh_pos}], {self.nodes[1].getnewaddress():29.99}, 0, {"feeRate": 0.1})
assert_greater_than(res["fee"], 0.05)
assert_greater_than(0.06, res["fee"])
# feeRate of 10 BTC / KB produces a total fee well above -maxtxfee
# previously this was silenty capped at -maxtxfee
assert_raises_rpc_error(-4, "Fee exceeds maximum configured by -maxtxfee", self.nodes[1].walletcreatefundedpsbt, [{"txid":txid,"vout":p2wpkh_pos},{"txid":txid,"vout":p2sh_p2wpkh_pos},{"txid":txid,"vout":p2pkh_pos}], {self.nodes[1].getnewaddress():29.99}, 0, {"feeRate": 10})
# partially sign multisig things with node 1
psbtx = self.nodes[1].walletcreatefundedpsbt([{"txid":txid,"vout":p2wsh_pos},{"txid":txid,"vout":p2sh_pos},{"txid":txid,"vout":p2sh_p2wsh_pos}], {self.nodes[1].getnewaddress():29.99})['psbt']
walletprocesspsbt_out = self.nodes[1].walletprocesspsbt(psbtx)