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openingd: ensure that initial channel can cover fees and reserve.

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This is probably covered by our "channel capacity" heuristic which
requires the channel be significant, but best to be explicit and sure.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-03-18 15:11:32 +10:30
committed by Christian Decker
parent 441a5b8835
commit 21fbae6df8
6 changed files with 70 additions and 8 deletions
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13
openingd/opening.c
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@@ -422,6 +422,9 @@ static u8 *funder_channel(struct state *state,
*/
tx = initial_channel_tx(state, &wscript, state->channel,
&state->next_per_commit[REMOTE], REMOTE);
if (!tx)
negotiation_failed(state,
"Could not meet their fees and reserve");
sign_tx_input(tx, 0, NULL, wscript,
&state->our_secrets.funding_privkey,
@@ -480,6 +483,9 @@ static u8 *funder_channel(struct state *state,
*/
tx = initial_channel_tx(state, &wscript, state->channel,
&state->next_per_commit[LOCAL], LOCAL);
if (!tx)
negotiation_failed(state,
"Could not meet our fees and reserve");
if (!check_tx_sig(tx, 0, NULL, wscript, &their_funding_pubkey, &sig)) {
peer_failed(&state->cs, state->gossip_index,
@@ -706,6 +712,9 @@ static u8 *fundee_channel(struct state *state,
*/
their_commit = initial_channel_tx(state, &wscript, state->channel,
&state->next_per_commit[LOCAL], LOCAL);
if (!their_commit)
negotiation_failed(state,
"Could not meet our fees and reserve");
if (!check_tx_sig(their_commit, 0, NULL, wscript, &their_funding_pubkey,
&theirsig)) {
@@ -740,6 +749,10 @@ static u8 *fundee_channel(struct state *state,
*/
our_commit = initial_channel_tx(state, &wscript, state->channel,
&state->next_per_commit[REMOTE], REMOTE);
if (!our_commit)
negotiation_failed(state,
"Could not meet their fees and reserve");
sign_tx_input(our_commit, 0, NULL, wscript,
&state->our_secrets.funding_privkey,
our_funding_pubkey, &sig);