Pkt *accept_pkt_htlc_fulfill(struct peer *peer, const Pkt *pkt)
{
const UpdateFulfillHtlc *f = pkt->update_fulfill_htlc;
size_t n_us, n_them;
struct sha256 r, rhash;
Pkt *err;
err = find_commited_htlc(peer, f->id, &n_us, &n_them);
if (err)
return err;
/* Now, it must solve the HTLC rhash puzzle. */
proto_to_sha256(f->r, &r);
sha256(&rhash, &r, sizeof(r));
if (!structeq(&rhash, &peer->us.staging_cstate->a.htlcs[n_us].rhash))
return pkt_err(peer, "Invalid r for %"PRIu64, f->id);
/* Same ID must have same rhash */
assert(structeq(&rhash, &peer->them.staging_cstate->b.htlcs[n_them].rhash));
funding_a_fulfill_htlc(peer->us.staging_cstate, n_us);
funding_b_fulfill_htlc(peer->them.staging_cstate, n_them);
return NULL;
}
Pkt *accept_pkt_htlc_fail(struct peer *peer, const Pkt *pkt)
{
const UpdateFailHtlc *f = pkt->update_fail_htlc;
struct htlc *htlc;
Pkt *err;
union htlc_staging stage;
err = find_commited_htlc(peer, f->id, &htlc);
if (err)
return err;
/* FIXME: Save reason. */
cstate_fail_htlc(peer->local.staging_cstate, htlc, OURS);
/* BOLT #2:
*
* ... and the receiving node MUST add the HTLC fulfill/fail
* to the unacked changeset for its local commitment.
*/
stage.fail.fail = HTLC_FAIL;
stage.fail.htlc = htlc;
add_unacked(&peer->local, &stage);
return NULL;
}
Pkt *accept_pkt_htlc_fail(struct peer *peer, const Pkt *pkt)
{
const UpdateFailHtlc *f = pkt->update_fail_htlc;
size_t n_us, n_them;
Pkt *err;
err = find_commited_htlc(peer, f->id, &n_us, &n_them);
if (err)
return err;
/* FIXME: Save reason. */
funding_a_fail_htlc(peer->us.staging_cstate, n_us);
funding_b_fail_htlc(peer->them.staging_cstate, n_them);
return NULL;
}
Pkt *accept_pkt_htlc_fulfill(struct peer *peer, const Pkt *pkt)
{
const UpdateFulfillHtlc *f = pkt->update_fulfill_htlc;
struct htlc *htlc;
struct sha256 rhash;
struct rval r;
Pkt *err;
union htlc_staging stage;
err = find_commited_htlc(peer, f->id, &htlc);
if (err)
return err;
/* Now, it must solve the HTLC rhash puzzle. */
proto_to_rval(f->r, &r);
sha256(&rhash, &r, sizeof(r));
if (!structeq(&rhash, &htlc->rhash))
return pkt_err(peer, "Invalid r for %"PRIu64, f->id);
/* We can relay this upstream immediately. */
our_htlc_fulfilled(peer, htlc, &r);
/* BOLT #2:
*
* ... and the receiving node MUST add the HTLC fulfill/fail
* to the unacked changeset for its local commitment.
*/
cstate_fulfill_htlc(peer->local.staging_cstate, htlc, OURS);
stage.fulfill.fulfill = HTLC_FULFILL;
stage.fulfill.htlc = htlc;
stage.fulfill.r = r;
add_unacked(&peer->local, &stage);
return NULL;
}
