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@@ -40,9 +40,9 @@ struct commit_info {
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unsigned int number;
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/* Funding before changes. */
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const struct funding *funding;
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/* Pending changes (for next commit_info) */
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int *changes_incoming;
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bool changes_outgoing;
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/* Pending changes (already applied to funding_next) */
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int *unacked_changeset;
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bool have_acked_changes;
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/* Cache of funding with changes applied. */
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struct funding funding_next;
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/* Have sent/received revocation secret. */
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@@ -69,7 +69,7 @@ struct peer {
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char *io;
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/* Last one is the one we're changing. */
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struct commit_info *us, *them;
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struct commit_info *local, *remote;
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};
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static u32 htlc_mask(unsigned int htlc)
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@@ -148,26 +148,35 @@ add:
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(*changes)[n] = c;
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}
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/*
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* Once we're sending/receiving revoke, we queue the changes on the
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* alternate side.
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/* BOLT #2:
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*
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* The node sending `update_revocation` MUST add the local unacked
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* changes to the set of remote acked changes.
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*
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* The receiver... MUST add the remote unacked changes to the set of
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* local acked changes.
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*/
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static bool apply_changes_other(struct peer *peer,
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static bool add_unacked_changes(struct peer *peer,
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struct commit_info *ci, int *changes,
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const char *what)
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{
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size_t i, n = tal_count(changes);
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if (n)
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add_text(peer, "Changes to %s:", what);
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add_text(peer, "%s acked:", what);
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/* BOLT #2:
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*
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* Note that an implementation MAY optimize this internally,
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* for example, pre-applying the changesets in some cases
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*/
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for (i = 0; i < n; i++) {
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if (!do_change(peer, what, &ci->funding_next.outhtlcs,
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&ci->funding_next.inhtlcs,
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&ci->funding_next.fee,
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changes[i]))
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return false;
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ci->changes_outgoing = true;
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ci->have_acked_changes = true;
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}
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return true;
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}
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@@ -175,17 +184,29 @@ static bool apply_changes_other(struct peer *peer,
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/*
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* Normally, we add incoming changes.
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*/
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/* BOLT #2:
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*
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* A sending node MUST apply all remote acked and unacked changes
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* except unacked fee changes to the remote commitment before
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* generating `sig`. ... A receiving node MUST apply all local acked
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* and unacked changes except unacked fee changes to the local
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* commitment
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*/
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static bool add_incoming_change(struct peer *peer,
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struct commit_info *ci, int c, const char *who)
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{
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/* BOLT #2:
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*
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* Note that an implementation MAY optimize this internally,
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* for example, pre-applying the changesets in some cases
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*/
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if (!do_change(NULL, NULL,
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&ci->funding_next.inhtlcs, &ci->funding_next.outhtlcs,
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NULL, c))
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return false;
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add_text(peer, "Queue ");
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add_change_internal(peer, &ci->changes_incoming, c);
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add_text(peer, " to %s", who);
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add_text(peer, "%s unacked: ", who);
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add_change_internal(peer, &ci->unacked_changeset, c);
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return true;
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}
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@@ -194,8 +215,8 @@ static struct commit_info *new_commit_info(const struct peer *peer,
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{
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struct commit_info *ci = talz(peer, struct commit_info);
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ci->prev = prev;
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ci->changes_incoming = tal_arr(ci, int, 0);
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ci->changes_outgoing = false;
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ci->unacked_changeset = tal_arr(ci, int, 0);
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ci->have_acked_changes = false;
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if (prev) {
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ci->number = prev->number + 1;
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ci->funding = &prev->funding_next;
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@@ -268,19 +289,19 @@ static void dump_commit_info(const struct commit_info *ci)
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if (ci->funding->fee)
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printf("\n Fee level %u", ci->funding->fee);
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n = tal_count(ci->changes_incoming);
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n = tal_count(ci->unacked_changeset);
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if (n > 0) {
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printf("\n Pending incoming:");
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printf("\n Pending unacked:");
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for (i = 0; i < n; i++) {
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if (ci->changes_incoming[i] == 0)
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if (ci->unacked_changeset[i] == 0)
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printf(" FEE");
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else
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printf(" %+i", ci->changes_incoming[i]);
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printf(" %+i", ci->unacked_changeset[i]);
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}
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}
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if (ci->changes_outgoing) {
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printf("\n Pending outgoing");
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if (ci->have_acked_changes) {
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printf("\n Pending acked");
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}
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if (ci->counterparty_signed)
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@@ -301,11 +322,11 @@ static void dump_rev(const struct commit_info *ci, bool all)
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static void dump_peer(const struct peer *peer, bool all)
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{
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printf("OUR COMMITS:\n");
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dump_rev(peer->us, all);
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printf("LOCAL COMMITS:\n");
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dump_rev(peer->local, all);
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printf("THEIR COMMITS:\n");
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dump_rev(peer->them, all);
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printf("REMOTE COMMITS:\n");
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dump_rev(peer->remote, all);
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}
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static void read_in(int fd, void *p, size_t len)
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@@ -326,39 +347,45 @@ static void read_peer(struct peer *peer, const char *str, const char *cmd)
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tal_free(p);
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}
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/* Offers HTLC:
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* - Record the change to them.
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/* BOLT #2:
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*
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* The sending node MUST add the HTLC addition to the unacked
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* changeset for its remote commitment
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*/
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static void send_offer(struct peer *peer, unsigned int htlc)
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{
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tal_append_fmt(&peer->io, "add_htlc %u", htlc);
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/* Can't have sent already. */
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if (!add_incoming_change(peer, peer->them, htlc, "them"))
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if (!add_incoming_change(peer, peer->remote, htlc, "remote"))
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errx(1, "offer: already offered %u", htlc);
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write_out(peer->outfd, "+", 1);
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write_out(peer->outfd, &htlc, sizeof(htlc));
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}
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/* Removes HTLC:
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* - Record the change to them.
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/* BOLT #2:
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*
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* The sending node MUST add the HTLC fulfill/fail to the unacked
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* changeset for its remote commitment
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*/
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static void send_remove(struct peer *peer, unsigned int htlc)
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{
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tal_append_fmt(&peer->io, "fulfill_htlc %u", htlc);
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/* Can't have removed already. */
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if (!add_incoming_change(peer, peer->them, -htlc, "them"))
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if (!add_incoming_change(peer, peer->remote, -htlc, "remote"))
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errx(1, "remove: already removed of %u", htlc);
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write_out(peer->outfd, "-", 1);
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write_out(peer->outfd, &htlc, sizeof(htlc));
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}
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/* Fee change:
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* - Record the change to them (but don't ever apply it!).
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/* BOLT #2:
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*
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* The sending node MUST add the fee change to the unacked changeset
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* for its remote commitment
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*/
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static void send_feechange(struct peer *peer)
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{
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tal_append_fmt(&peer->io, "update_fee");
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if (!add_incoming_change(peer, peer->them, 0, "them"))
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if (!add_incoming_change(peer, peer->remote, 0, "remote"))
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errx(1, "INTERNAL: failed to change fee");
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write_out(peer->outfd, "F", 1);
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}
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@@ -384,25 +411,39 @@ static struct commit_info *last_unrevoked(struct commit_info *ci)
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}
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/* Commit:
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* - Apply changes to them.
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* - Apply changes to remote.
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*/
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static void send_commit(struct peer *peer)
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{
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struct signature sig;
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/* Must have changes. */
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if (tal_count(peer->them->changes_incoming) == 0
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&& !peer->them->changes_outgoing)
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/* BOLT #2:
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*
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* A node MUST NOT send an `update_commit` message which does
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* not include any updates. */
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if (tal_count(peer->remote->unacked_changeset) == 0
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&& !peer->remote->have_acked_changes)
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errx(1, "commit: no changes to commit");
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/* BOLT #2:
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*
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* An implementation MAY choose not to send an `update_commit`
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* until it receives the `update_revocation` response to the
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* previous `update_commit`, so there is only ever one
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* unrevoked local commitment. */
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if (peer->commitwait
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&& peer->them->prev && !peer->them->prev->revoked)
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&& peer->remote->prev && !peer->remote->prev->revoked)
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errx(1, "commit: must wait for previous commit");
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tal_append_fmt(&peer->io, "update_commit");
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peer->them = apply_changes(peer, peer->them, "THEM");
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sig = commit_sig(peer->them);
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peer->them->counterparty_signed = true;
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/* BOLT #2:
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*
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* A sending node MUST apply all remote acked and unacked
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* changes except unacked fee changes to the remote commitment
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* before generating `sig`. */
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peer->remote = apply_changes(peer, peer->remote, "REMOTE");
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sig = commit_sig(peer->remote);
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peer->remote->counterparty_signed = true;
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/* Tell other side about commit and result (it should agree!) */
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write_out(peer->outfd, "C", 1);
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@@ -414,7 +455,7 @@ static void send_commit(struct peer *peer)
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*/
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static void receive_revoke(struct peer *peer, u32 number)
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{
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struct commit_info *ci = last_unrevoked(peer->them);
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struct commit_info *ci = last_unrevoked(peer->remote);
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if (!ci)
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errx(1, "receive_revoke: no commit to revoke");
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@@ -423,7 +464,7 @@ static void receive_revoke(struct peer *peer, u32 number)
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number, ci->number);
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/* This shouldn't happen if we don't allow multiple commits. */
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if (peer->commitwait && ci != peer->them->prev)
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if (peer->commitwait && ci != peer->remote->prev)
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errx(1, "receive_revoke: always revoke previous?");
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tal_append_fmt(&peer->io, "<");
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@@ -431,42 +472,52 @@ static void receive_revoke(struct peer *peer, u32 number)
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if (!ci->counterparty_signed)
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errx(1, "receive_revoke: revoked unsigned commit?");
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/* The changes we sent with that commit, add them to us. */
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if (!apply_changes_other(peer, peer->us, ci->changes_incoming, "us"))
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errx(1, "receive_revoke: could not add their changes to us");
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/* BOLT #2:
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*
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* The receiver of `update_revocation`... MUST add the remote
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* unacked changes to the set of local acked changes. */
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if (!add_unacked_changes(peer, peer->local, ci->unacked_changeset,
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"local"))
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errx(1, "receive_revoke: could not add their changes to local");
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/* Cleans up dump output now we've consumed them. */
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tal_free(ci->changes_incoming);
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ci->changes_incoming = tal_arr(ci, int, 0);
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tal_free(ci->unacked_changeset);
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ci->unacked_changeset = tal_arr(ci, int, 0);
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}
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/* Receives HTLC offer:
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* - Record the change to us.
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/* BOLT #2:
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*
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* the receiving node MUST add the HTLC addition to the unacked
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* changeset for its local commitment.
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*/
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static void receive_offer(struct peer *peer, unsigned int htlc)
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{
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tal_append_fmt(&peer->io, "<");
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if (!add_incoming_change(peer, peer->us, htlc, "us"))
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if (!add_incoming_change(peer, peer->local, htlc, "local"))
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errx(1, "receive_offer: already offered of %u", htlc);
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}
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/* Receive HTLC remove:
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* - Record the change to us.
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/* BOLT #2:
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*
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* the receiving node MUST add the HTLC fulfill/fail to the unacked
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* changeset for its local commitment.
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*/
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static void receive_remove(struct peer *peer, unsigned int htlc)
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{
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tal_append_fmt(&peer->io, "<");
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if (!add_incoming_change(peer, peer->us, -htlc, "us"))
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if (!add_incoming_change(peer, peer->local, -htlc, "local"))
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errx(1, "receive_remove: already removed %u", htlc);
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}
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/* Receives fee change:
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* - Record the change to us (but never apply it).
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/* BOLT #2:
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*
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* the receiving node MUST add the fee change to the unacked changeset
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* for its local commitment.
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*/
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static void receive_feechange(struct peer *peer)
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{
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tal_append_fmt(&peer->io, "<");
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if (!add_incoming_change(peer, peer->us, 0, "us"))
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if (!add_incoming_change(peer, peer->local, 0, "local"))
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errx(1, "INTERNAL: failed to change fee");
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}
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@@ -483,14 +534,17 @@ static void send_revoke(struct peer *peer, struct commit_info *ci)
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assert(!ci->revoked);
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ci->revoked = true;
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/* Queue changes. */
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if (!apply_changes_other(peer, peer->them, ci->changes_incoming,
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|
"them"))
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|
errx(1, "Failed queueing changes to them for send_revoke");
|
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|
|
/* BOLT #2:
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|
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|
*
|
|
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|
* The node sending `update_revocation` MUST add the local
|
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|
|
* unacked changes to the set of remote acked changes. */
|
|
|
|
|
if (!add_unacked_changes(peer, peer->remote, ci->unacked_changeset,
|
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|
"remote"))
|
|
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|
|
errx(1, "Failed queueing changes to remote for send_revoke");
|
|
|
|
|
|
|
|
|
|
/* Clean up for dump output. */
|
|
|
|
|
tal_free(ci->changes_incoming);
|
|
|
|
|
ci->changes_incoming = tal_arr(ci, int, 0);
|
|
|
|
|
tal_free(ci->unacked_changeset);
|
|
|
|
|
ci->unacked_changeset = tal_arr(ci, int, 0);
|
|
|
|
|
|
|
|
|
|
write_out(peer->outfd, "R", 1);
|
|
|
|
|
write_out(peer->outfd, &ci->number, sizeof(ci->number));
|
|
|
|
|
@@ -503,24 +557,34 @@ static void receive_commit(struct peer *peer, const struct signature *sig)
|
|
|
|
|
{
|
|
|
|
|
struct signature oursig;
|
|
|
|
|
|
|
|
|
|
/* Must have changes. */
|
|
|
|
|
if (tal_count(peer->us->changes_incoming) == 0
|
|
|
|
|
&& !peer->us->changes_outgoing)
|
|
|
|
|
/* BOLT #2:
|
|
|
|
|
*
|
|
|
|
|
* A node MUST NOT send an `update_commit` message which does
|
|
|
|
|
* not include any updates.
|
|
|
|
|
*/
|
|
|
|
|
if (tal_count(peer->local->unacked_changeset) == 0
|
|
|
|
|
&& !peer->local->have_acked_changes)
|
|
|
|
|
errx(1, "receive_commit: no changes to commit");
|
|
|
|
|
|
|
|
|
|
tal_append_fmt(&peer->io, "<");
|
|
|
|
|
|
|
|
|
|
peer->us = apply_changes(peer, peer->us, "US");
|
|
|
|
|
oursig = commit_sig(peer->us);
|
|
|
|
|
/* BOLT #2:
|
|
|
|
|
*
|
|
|
|
|
* A receiving node MUST apply all local acked and unacked
|
|
|
|
|
* changes except unacked fee changes to the local commitment,
|
|
|
|
|
* then it MUST check `sig` is valid for that transaction.
|
|
|
|
|
*/
|
|
|
|
|
peer->local = apply_changes(peer, peer->local, "LOCAL");
|
|
|
|
|
oursig = commit_sig(peer->local);
|
|
|
|
|
if (!structeq(sig, &oursig))
|
|
|
|
|
errx(1, "Commit state %#x/%#x/%u, they gave %#x/%#x/%u",
|
|
|
|
|
sig->f.inhtlcs, sig->f.outhtlcs, sig->f.fee,
|
|
|
|
|
oursig.f.inhtlcs, oursig.f.outhtlcs, oursig.f.fee);
|
|
|
|
|
peer->us->counterparty_signed = true;
|
|
|
|
|
peer->local->counterparty_signed = true;
|
|
|
|
|
|
|
|
|
|
/* This is the one case where we send without a command. */
|
|
|
|
|
tal_append_fmt(&peer->text, "\n");
|
|
|
|
|
send_revoke(peer, peer->us->prev);
|
|
|
|
|
send_revoke(peer, peer->local->prev);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void do_cmd(struct peer *peer)
|
|
|
|
|
@@ -575,10 +639,10 @@ static void do_cmd(struct peer *peer)
|
|
|
|
|
} else if (streq(cmd, "nocommitwait")) {
|
|
|
|
|
peer->commitwait = false;
|
|
|
|
|
} else if (streq(cmd, "checksync")) {
|
|
|
|
|
write_all(peer->cmddonefd, peer->us->funding,
|
|
|
|
|
sizeof(*peer->us->funding));
|
|
|
|
|
write_all(peer->cmddonefd, peer->them->funding,
|
|
|
|
|
sizeof(*peer->them->funding));
|
|
|
|
|
write_all(peer->cmddonefd, peer->local->funding,
|
|
|
|
|
sizeof(*peer->local->funding));
|
|
|
|
|
write_all(peer->cmddonefd, peer->remote->funding,
|
|
|
|
|
sizeof(*peer->remote->funding));
|
|
|
|
|
return;
|
|
|
|
|
} else if (streq(cmd, "dump")) {
|
|
|
|
|
dump_peer(peer, false);
|
|
|
|
|
@@ -595,7 +659,7 @@ static void do_cmd(struct peer *peer)
|
|
|
|
|
tal_free(peer->io);
|
|
|
|
|
|
|
|
|
|
/* We must always have (at least one) signed, unrevoked commit. */
|
|
|
|
|
for (ci = peer->us; ci; ci = ci->prev) {
|
|
|
|
|
for (ci = peer->local; ci; ci = ci->prev) {
|
|
|
|
|
if (ci->counterparty_signed && !ci->revoked) {
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
@@ -627,11 +691,11 @@ static void new_peer(int infdpair[2], int outfdpair[2], int cmdfdpair[2],
|
|
|
|
|
peer->commitwait = true;
|
|
|
|
|
|
|
|
|
|
/* Create first, signed commit info. */
|
|
|
|
|
peer->us = new_commit_info(peer, NULL);
|
|
|
|
|
peer->us->counterparty_signed = true;
|
|
|
|
|
peer->local = new_commit_info(peer, NULL);
|
|
|
|
|
peer->local->counterparty_signed = true;
|
|
|
|
|
|
|
|
|
|
peer->them = new_commit_info(peer, NULL);
|
|
|
|
|
peer->them->counterparty_signed = true;
|
|
|
|
|
peer->remote = new_commit_info(peer, NULL);
|
|
|
|
|
peer->remote->counterparty_signed = true;
|
|
|
|
|
|
|
|
|
|
peer->infd = infdpair[0];
|
|
|
|
|
peer->outfd = outfdpair[1];
|
|
|
|
|
@@ -662,7 +726,7 @@ static void draw_line(char **str,
|
|
|
|
|
if (n == 0)
|
|
|
|
|
errx(1, "Receive without send?");
|
|
|
|
|
|
|
|
|
|
tal_append_fmt(str, "<line x1=\"%i\" y1=\"%i\" x2=\"%i\" y2=\"%i\" marker-end=\"url(#tri)\" stroke=\"black\" stroke-width=\"0.2\"/>\n",
|
|
|
|
|
tal_append_fmt(str, "<line x1=\"%i\" y1=\"%i\" x2=\"%i\" y2=\"%i\" marker-end=\"url(#tri)\" stroke=\"black\" stroke-width=\"0.5\"/>\n",
|
|
|
|
|
old_x, (*sent)[0].y - LINE_HEIGHT/2,
|
|
|
|
|
new_x, new_y - LINE_HEIGHT/2);
|
|
|
|
|
tal_append_fmt(str, "<text text-anchor=\"middle\" "TEXT_STYLE" x=\"%i\" y=\"%i\">%s</text>\n",
|
|
|
|
|
|
Rusty Russell