state: remove unused fields from union input

And make the add/fail/fulfill arg a pointer to a union htlc_staging
directly, removing struct htlc_progress.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

daemon/packets.c

@@ -167,18 +167,17 @@ void queue_pkt_open_complete(struct peer *peer)
 	queue_pkt(peer, PKT__PKT_OPEN_COMPLETE, o);
 }
 
-void queue_pkt_htlc_add(struct peer *peer,
-		  const struct htlc_progress *htlc_prog)
+void queue_pkt_htlc_add(struct peer *peer, const struct channel_htlc *htlc)
 {
 	UpdateAddHtlc *u = tal(peer, UpdateAddHtlc);
+	union htlc_staging stage;
 
 	update_add_htlc__init(u);
-	assert(htlc_prog->stage.type == HTLC_ADD);
 
-	u->id = htlc_prog->stage.add.htlc.id;
-	u->amount_msat = htlc_prog->stage.add.htlc.msatoshis;
-	u->r_hash = sha256_to_proto(u, &htlc_prog->stage.add.htlc.rhash);
-	u->expiry = abs_locktime_to_proto(u, &htlc_prog->stage.add.htlc.expiry);
+	u->id = htlc->id;
+	u->amount_msat = htlc->msatoshis;
+	u->r_hash = sha256_to_proto(u, &htlc->rhash);
+	u->expiry = abs_locktime_to_proto(u, &htlc->expiry);
 	/* FIXME: routing! */
 	u->route = tal(u, Routing);
 	routing__init(u->route);
@@ -189,16 +188,19 @@ void queue_pkt_htlc_add(struct peer *peer,
 	 * changeset for its remote commitment
 	 */
 	if (!funding_add_htlc(peer->remote.staging_cstate,
-			      htlc_prog->stage.add.htlc.msatoshis,
-			      &htlc_prog->stage.add.htlc.expiry,
-			      &htlc_prog->stage.add.htlc.rhash,
-			      htlc_prog->stage.add.htlc.id, OURS))
+			      htlc->msatoshis,
+			      &htlc->expiry,
+			      &htlc->rhash,
+			      htlc->id, OURS))
 		fatal("Could not add HTLC?");
-	add_unacked(&peer->remote, &htlc_prog->stage);
+
+	stage.add.add = HTLC_ADD;
+	stage.add.htlc = *htlc;
+	add_unacked(&peer->remote, &stage);
 
 	remote_changes_pending(peer);
 
-	peer_add_htlc_expiry(peer, &htlc_prog->stage.add.htlc.expiry);
+	peer_add_htlc_expiry(peer, &htlc->expiry);
 
 	queue_pkt(peer, PKT__PKT_UPDATE_ADD_HTLC, u);
 }

daemon/peer.c

@@ -497,12 +497,11 @@ static bool command_htlc_fail(struct peer *peer, u64 id)
 		queue_pkt_htlc_fail(peer, id);
 	} else {
 		union input idata;
-		struct htlc_progress prog;
+		union htlc_staging stage;
 
-		prog.stage.fail.fail = HTLC_FAIL;
-		prog.stage.fail.id = id;
-		/* FIXME: get rid of htlc_progress, just use htlc_staging. */
-		idata.htlc_prog = &prog;
+		stage.fail.fail = HTLC_FAIL;
+		stage.fail.id = id;
+		idata.stage = &stage;
 		state_event(peer, CMD_SEND_HTLC_FAIL, &idata);
 	}
 	return true;
@@ -522,13 +521,12 @@ static bool command_htlc_fulfill(struct peer *peer,
 		queue_pkt_htlc_fulfill(peer, id, r);
 	} else {
 		union input idata;
-		struct htlc_progress prog;
+		union htlc_staging stage;
 
-		prog.stage.fulfill.fulfill = HTLC_FULFILL;
-		prog.stage.fulfill.r = *r;
-		prog.stage.fulfill.id = id;
-		/* FIXME: get rid of htlc_progress, just use htlc_staging. */
-		idata.htlc_prog = &prog;
+		stage.fulfill.fulfill = HTLC_FULFILL;
+		stage.fulfill.r = *r;
+		stage.fulfill.id = id;
+		idata.stage = &stage;
 		state_event(peer, CMD_SEND_HTLC_FULFILL, &idata);
 	}
 	return true;
@@ -2324,12 +2322,12 @@ static void do_newhtlc(struct peer *peer,
 {
 	struct channel_state *cstate;
 	union input idata;
-	struct htlc_progress prog;
+	union htlc_staging stage;
 
 	/* Now we can assign counter and guarantee uniqueness. */
-	prog.stage.add.add = HTLC_ADD;
-	prog.stage.add.htlc = *htlc;
-	prog.stage.add.htlc.id = peer->htlc_id_counter;
+	stage.add.add = HTLC_ADD;
+	stage.add.htlc = *htlc;
+	stage.add.htlc.id = peer->htlc_id_counter;
 
 	/* BOLT #2:
 	 *
@@ -2379,7 +2377,7 @@ static void do_newhtlc(struct peer *peer,
 	peer->htlc_id_counter++;	
 
 	/* FIXME: Never propose duplicate rvalues? */
-	idata.htlc_prog = &prog;
+	idata.stage = &stage;
 	state_event(peer, CMD_SEND_HTLC_ADD, &idata);
 	command_success(jsoncmd, null_response(jsoncmd));
 }

daemon/peer.h

@@ -94,11 +94,6 @@ struct peer_visible_state {
 	struct channel_state *staging_cstate;
 };
 
-struct htlc_progress {
-	/* The HTLC we're working on. */
-	union htlc_staging stage;
-};
-
 struct out_pkt {
 	Pkt *pkt;
 	void (*ack_cb)(struct peer *peer, void *arg);

state.c

@@ -251,19 +251,20 @@ enum state state(struct peer *peer,
 	case STATE_NORMAL_COMMITTING:
 		if (input_is(input, CMD_SEND_HTLC_ADD)) {
 			/* We are to send an HTLC add. */
-			queue_pkt_htlc_add(peer, idata->htlc_prog);
+			assert(idata->stage->type == HTLC_ADD);
+			queue_pkt_htlc_add(peer, &idata->stage->add.htlc);
 			return unchanged_state(peer, input);
 		} else if (input_is(input, CMD_SEND_HTLC_FULFILL)) {
-			assert(idata->htlc_prog->stage.type == HTLC_FULFILL);
+			assert(idata->stage->type == HTLC_FULFILL);
 			/* We are to send an HTLC fulfill. */
 			queue_pkt_htlc_fulfill(peer,
-					       idata->htlc_prog->stage.fulfill.id,
-					       &idata->htlc_prog->stage.fulfill.r);
+					       idata->stage->fulfill.id,
+					       &idata->stage->fulfill.r);
 			return unchanged_state(peer, input);
 		} else if (input_is(input, CMD_SEND_HTLC_FAIL)) {
-			assert(idata->htlc_prog->stage.type == HTLC_FAIL);
+			assert(idata->stage->type == HTLC_FAIL);
 			/* We are to send an HTLC fail. */
-			queue_pkt_htlc_fail(peer, idata->htlc_prog->stage.fail.id);
+			queue_pkt_htlc_fail(peer, idata->stage->fail.id);
 			return unchanged_state(peer, input);
 		}
 		/* Only expect revocation in STATE_NORMAL_COMMITTING */

state.h

@@ -80,19 +80,10 @@ static inline bool input_is_pkt(enum state_input input)
 }
 
 union input {
+	/* For PKT_* */
 	Pkt *pkt;
-	struct command *cmd;
-	struct bitcoin_tx *tx;
-	struct htlc_progress *htlc_prog;
-	struct commit_info *ci;
-	struct htlc_onchain {
-		/* Which commitment we using. */
-		struct commit_info *ci;
-		/* Which HTLC. */
-		size_t i;
-		/* The rvalue (or NULL). */
-		u8 *r;
-	} *htlc_onchain;
+	/* For CMD_SEND_HTLC_ADD, CMD_SEND_HTLC_FULFILL, CMD_SEND_HTLC_FAIL */
+	union htlc_staging *stage;
 };
 
 enum state state(struct peer *peer,
@@ -125,17 +116,13 @@ struct signature;
 /* Inform peer have an unexpected packet. */
 void peer_unexpected_pkt(struct peer *peer, const Pkt *pkt);
 
-/* An on-chain transaction revealed an R value. */
-void peer_tx_revealed_r_value(struct peer *peer,
-			      const struct htlc_onchain *htlc_onchain);
-
 /* Send various kinds of packets */
 void queue_pkt_open(struct peer *peer, OpenChannel__AnchorOffer anchor);
 void queue_pkt_anchor(struct peer *peer);
 void queue_pkt_open_commit_sig(struct peer *peer);
 void queue_pkt_open_complete(struct peer *peer);
 void queue_pkt_htlc_add(struct peer *peer,
-			const struct htlc_progress *htlc_prog);
+			const struct channel_htlc *htlc);
 void queue_pkt_htlc_fulfill(struct peer *peer, u64 id, const struct sha256 *r);
 void queue_pkt_htlc_fail(struct peer *peer, u64 id);
 void queue_pkt_commit(struct peer *peer);