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itest: send one more UTXO for neutrino backend

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Send another UTXO if this is a neutrino backend. When sweeping anchors,
there are two transactions created, `local_sweep_tx` for sweeping
Alice's anchor on the local commitment, `remote_sweep_tx` for sweeping
her anchor on the remote commitment. Whenever the force close
transaction is published, Alice will always create these two
transactions to sweep her anchor.

On the other hand, when creating the sweep txes, the anchor itself is
not able to cover the fee, so another wallet UTXO is needed.  In our
test case, there's a change output that can be used from the above
funding process. And it's used by both sweep txes - when `lnd` happens
to create the `remote_sweep_tx` first, it will receive an error since
its parent tx, the remote commitment, is not known, hence freeing the
change output to be used by `local_sweep_tx`.  For neutrino client,
however, it will consider the transaction which sweeps the remote anchor
as an orphan tx, and it will neither send it to the mempool nor return
an error to free the change output.  Thus, if the change output is
already used in `remote_sweep_tx`, we won't have UTXO to create
`local_sweep_tx`.
This commit is contained in:
yyforyongyu 2023-01-16 07:33:36 +08:00
parent 8df5de3e43
commit ede86cf08f
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5
lntest/itest/lnd_revocation_test.go
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@ -688,6 +688,11 @@ func testRevokedCloseRetributionAltruistWatchtowerCase(ht *lntemp.HarnessTest,
// directly from the miner.
ht.FundCoins(btcutil.SatoshiPerBitcoin, dave)
// Send one more UTXOs if this is a neutrino backend.
if ht.IsNeutrinoBackend() {
ht.FundCoins(btcutil.SatoshiPerBitcoin, dave)
}
// In order to test Dave's response to an uncooperative channel
// closure by Carol, we'll first open up a channel between them with a
// 0.5 BTC value.