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elements: Ignore fee outputs when computing the fee

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Turns out we get a wrong fee otherwise...

Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker 2019-05-09 18:51:39 +02:00 committed by Rusty Russell
parent 99988cb0e1
commit 1e7b46e3c2
1 changed files with 9 additions and 0 deletions
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9
lightningd/closing_control.c
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@ -23,8 +23,17 @@ static struct amount_sat calc_tx_fee(struct amount_sat sat_in,
const struct bitcoin_tx *tx)
{
struct amount_sat amt, fee = sat_in;
const u8 *oscript;
size_t scriptlen;
for (size_t i = 0; i < tx->wtx->num_outputs; i++) {
amt = bitcoin_tx_output_get_amount(tx, i);
oscript = bitcoin_tx_output_get_script(NULL, tx, i);
scriptlen = tal_bytelen(oscript);
tal_free(oscript);
if (is_elements && scriptlen == 0)
continue;
if (!amount_sat_sub(&fee, fee, amt))
fatal("Tx spends more than input %s? %s",
type_to_string(tmpctx, struct amount_sat, &sat_in),