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daemon: send feechange requests.

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This is a bit overzealous, but good for testing.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2016-08-26 15:33:40 +09:30
parent 31bdf384cb
commit 1305df6417
1 changed files with 66 additions and 4 deletions
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70
daemon/peer.c
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@ -2111,6 +2111,44 @@ static void peer_disconnect(struct io_conn *conn, struct peer *peer)
}
}
static u64 desired_commit_feerate(struct lightningd_state *dstate)
{
return get_feerate(dstate) * dstate->config.commitment_fee_percent / 100;
}
static void maybe_propose_new_feerate(struct peer *peer)
{
u64 rate, max_rate;
rate = desired_commit_feerate(peer->dstate);
max_rate = approx_max_feerate(peer->remote.commit->cstate, LOCAL);
/* BOLT #2:
*
* The sending node MUST NOT send a `fee_rate` which it could not
* afford (see "Fee Calculation), were it applied to the receiving
* node's commitment transaction. */
if (rate > max_rate) {
log_debug(peer->log,
"Cannot afford feerate %"PRIi64" using %"PRIi64,
rate, max_rate);
rate = max_rate;
/* If this is less than we have no, don't change! */
if (rate < peer->local.staging_cstate->fee_rate) {
log_debug(peer->log, "Leaving old rate in place");
return;
}
}
/* No fee rate change? Fine. */
if (peer->local.staging_cstate->fee_rate == rate)
return;
set_feechange(peer, rate, SENT_FEECHANGE);
queue_pkt_feechange(peer, rate);
}
static void do_commit(struct peer *peer, struct command *jsoncmd)
{
struct commit_info *ci;
@ -2127,6 +2165,9 @@ static void do_commit(struct peer *peer, struct command *jsoncmd)
};
bool to_us_only;
/* If we want to change the payrate, do it now. */
maybe_propose_new_feerate(peer);
/* We can have changes we suggested, or changes they suggested. */
if (!peer_uncommitted_changes(peer)) {
log_debug(peer->log, "do_commit: no changes to commit");
@ -2374,10 +2415,7 @@ static bool peer_first_connected(struct peer *peer,
peer->io_data = tal_steal(peer, iod);
peer->id = tal_dup(peer, struct pubkey, id);
/* FIXME: Make this dynamic! */
peer->local.commit_fee_rate
= get_feerate(peer->dstate)
* peer->dstate->config.commitment_fee_percent / 100;
peer->local.commit_fee_rate = desired_commit_feerate(peer->dstate);
/* Make it different from other node (to catch bugs!), but a
* round number for simple eyeballing. */
@ -2912,6 +2950,30 @@ static enum watch_result anchor_depthchange(struct peer *peer,
/* Since this gets called on every new block, check HTLCs here. */
check_htlc_expiry(peer);
/* If fee rate has changed, fire off update to change it. */
if (peer->local.staging_cstate->fee_rate
!= desired_commit_feerate(peer->dstate)) {
log_debug(peer->log, "fee rate changed to %"PRIu64,
desired_commit_feerate(peer->dstate));
remote_changes_pending(peer);
}
/* BOLT #2:
*
* A node MUST update bitcoin fees if it estimates that the
* current commitment transaction will not be processed in a
* timely manner (see "Risks With HTLC Timeouts").
*/
/* FIXME: BOLT should say what to do if it can't! We drop conn. */
if (peer->local.commit->cstate->fee_rate < get_feerate(peer->dstate)) {
log_broken(peer->log, "fee rate %"PRIu64" lower than %"PRIu64,
peer->local.commit->cstate->fee_rate,
get_feerate(peer->dstate));
set_peer_state(peer, STATE_ERR_BREAKDOWN, __func__, false);
peer_breakdown(peer);
}
return KEEP_WATCHING;
}