commit_tx: expose internals to give access to HTLC witness scripts.

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

daemon/commit_tx.h

@@ -2,6 +2,7 @@
 #define LIGHTNING_COMMIT_TX_H
 #include "config.h"
 #include "daemon/channel.h"
+#include "daemon/htlc.h"
 
 struct channel_state;
 struct sha256_double;
@@ -9,6 +10,16 @@ struct sha256;
 struct pubkey;
 struct rel_locktime;
 
+u8 *wscript_for_htlc(const tal_t *ctx,
+		     secp256k1_context *secpctx,
+		     const struct htlc *h,
+		     const struct pubkey *our_final,
+		     const struct pubkey *their_final,
+		     const struct rel_locktime *our_locktime,
+		     const struct rel_locktime *their_locktime,
+		     const struct sha256 *rhash,
+		     enum htlc_side side);
+
 /* Create commitment tx to spend the anchor tx output; doesn't fill in
  * input scriptsig. */
 struct bitcoin_tx *create_commit_tx(const tal_t *ctx,