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channeld, openingd: take into account option_anchor_outputs for fees.

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HTLC fees increase (larger weight), and the fee paid by the opener
has to include the anchor outputs (i.e. 660 sats).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2020-08-14 03:14:02 +09:30
parent 7a2f964d43
commit 85e3b43176
17 changed files with 127 additions and 68 deletions
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4
common/initial_commit_tx.c
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@@ -74,6 +74,7 @@ struct bitcoin_tx *initial_commit_tx(const tal_t *ctx,
u64 obscured_commitment_number,
struct wally_tx_output *direct_outputs[NUM_SIDES],
enum side side,
bool option_anchor_outputs,
char** err_reason)
{
struct amount_sat base_fee;
@@ -101,7 +102,8 @@ struct bitcoin_tx *initial_commit_tx(const tal_t *ctx,
* 2. Calculate the base [commitment transaction
* fee](#fee-calculation).
*/
base_fee = commit_tx_base_fee(feerate_per_kw, untrimmed);
base_fee = commit_tx_base_fee(feerate_per_kw, untrimmed,
option_anchor_outputs);
/* BOLT #3:
*