lightningd: store the htlc stubs.

These belong in the database, but for now just keep an array.

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

lightningd/peer_control.c

@@ -3,7 +3,6 @@
 #include "subd.h"
 #include <bitcoin/script.h>
 #include <bitcoin/tx.h>
-#include <ccan/crypto/ripemd160/ripemd160.h>
 #include <ccan/fdpass/fdpass.h>
 #include <ccan/io/io.h>
 #include <ccan/noerr/noerr.h>
@@ -31,6 +30,7 @@
 #include <lightningd/hsm_control.h>
 #include <lightningd/key_derive.h>
 #include <lightningd/new_connection.h>
+#include <lightningd/onchain/onchain_wire.h>
 #include <lightningd/opening/gen_opening_wire.h>
 #include <lightningd/peer_htlcs.h>
 #include <lightningd/status.h>
@@ -530,6 +530,7 @@ void add_peer(struct lightningd *ld, u64 unique_id,
 		= peer->next_index[REMOTE]
 		= peer->num_revocations_received = 0;
 	peer->next_htlc_id = 0;
+	peer->htlcs = tal_arr(peer, struct htlc_stub, 0);
 	wallet_shachain_init(ld->wallet, &peer->their_shachain);
 
 	idname = type_to_string(peer, struct pubkey, id);

lightningd/peer_control.h

@@ -94,6 +94,9 @@ struct peer {
 	/* Reestablishment stuff: last sent commit and revocation details. */
 	bool last_was_revoke;
 	struct changed_htlc *last_sent_commit;
+
+	/* FIXME: Just leave this in the db. */
+	struct htlc_stub *htlcs;
 };
 
 static inline bool peer_can_add_htlc(const struct peer *peer)

lightningd/peer_htlcs.c

@@ -1,5 +1,6 @@
 #include <bitcoin/tx.h>
 #include <ccan/build_assert/build_assert.h>
+#include <ccan/crypto/ripemd160/ripemd160.h>
 #include <ccan/mem/mem.h>
 #include <ccan/tal/str/str.h>
 #include <daemon/chaintopology.h>
@@ -11,6 +12,7 @@
 #include <lightningd/htlc_end.h>
 #include <lightningd/htlc_wire.h>
 #include <lightningd/lightningd.h>
+#include <lightningd/onchain/onchain_wire.h>
 #include <lightningd/pay.h>
 #include <lightningd/peer_control.h>
 #include <lightningd/peer_htlcs.h>
@@ -80,7 +82,14 @@ static void save_htlc_stub(struct lightningd *ld,
 			   u32 cltv_value,
 			   const struct sha256 *payment_hash)
 {
-	/* FIXME: remember peer, side, cltv and RIPEMD160(hash) */
+	size_t n = tal_count(peer->htlcs);
+	tal_resize(&peer->htlcs, n+1);
+	peer->htlcs[n].owner = owner;
+	peer->htlcs[n].cltv_expiry = cltv_value;
+	ripemd160(&peer->htlcs[n].ripemd,
+		  payment_hash->u.u8, sizeof(payment_hash->u));
+
+	/* FIXME: save to db instead! */
 }
 
 static void fail_in_htlc(struct htlc_in *hin,