hsmd: roll the definition of simple_htlc into the csv.

This is such a simple struct that we can actually define it in csv.
This prevents us from accidentally breaking the ABI in future.

I tested this hadn't accidentally changed the wire format by disabling
version checks and using an old hsmd with the altered daemons and
running the test suite.

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

channeld/channeld.c

@@ -913,6 +913,20 @@ static u8 *master_wait_sync_reply(const tal_t *ctx,
 }
 
 /* Collect the htlcs for call to hsmd. */
+static struct simple_htlc *new_simple_htlc(const tal_t *ctx,
+					   enum side side,
+					   struct amount_msat amount,
+					   const struct sha256 *payment_hash,
+					   u32 cltv_expiry)
+{
+	struct simple_htlc *simple = tal(ctx, struct simple_htlc);
+	simple->side = side;
+	simple->amount = amount;
+	simple->payment_hash = *payment_hash;
+	simple->cltv_expiry = cltv_expiry;
+	return simple;
+}
+
 static struct simple_htlc **collect_htlcs(const tal_t *ctx, const struct htlc **htlc_map)
 {
 	struct simple_htlc **htlcs;

common/hsm_version.h

@@ -27,7 +27,7 @@
  * v5 with preapprove_check: 0ed6dd4ea2c02b67c51b1420b3d07ab2227a4c06ce7e2942d946967687e9baf7
  * v6 no secret from get_per_commitment_point: 0cad1790beb3473d64355f4cb4f64daa80c28c8a241998b7ef0223385d7ffff9
  * v6 with sign_bolt12_2 (tweak using node id): 8fcb731279a10af3f95aeb8be1da6b2ced76a1984afa18c5f46a03515d70ea0e
- * v6 (internal rework only): fba120d3d926de00f0377c4cba91caa89a9eaacb666fd04a5a0e677b4d310d65
+ * v6 (internal rework only): eb34a3d575c2d2a2ed4d70df0858670b066fb8cb75ec8d39d0c996ae195a473b
 */
 #define HSM_MIN_VERSION 5
 #define HSM_MAX_VERSION 6

common/htlc_wire.c

@@ -24,20 +24,6 @@ static struct failed_htlc *failed_htlc_dup(const tal_t *ctx,
 	return newf;
 }
 
-struct simple_htlc *new_simple_htlc(const tal_t *ctx,
-				    enum side side,
-				    struct amount_msat amount,
-				    const struct sha256 *payment_hash,
-				    u32 cltv_expiry)
-{
-	struct simple_htlc *simple = tal(ctx, struct simple_htlc);
-	simple->side = side;
-	simple->amount = amount;
-	simple->payment_hash = *payment_hash;
-	simple->cltv_expiry = cltv_expiry;
-	return simple;
-}
-
 struct existing_htlc *new_existing_htlc(const tal_t *ctx,
 					u64 id,
 					enum htlc_state state,
@@ -113,14 +99,6 @@ void towire_existing_htlc(u8 **pptr, const struct existing_htlc *existing)
 		towire_bool(pptr, false);
 }
 
-void towire_simple_htlc(u8 **pptr, const struct simple_htlc *simple)
-{
-	towire_side(pptr, simple->side);
-	towire_amount_msat(pptr, simple->amount);
-	towire_sha256(pptr, &simple->payment_hash);
-	towire_u32(pptr, simple->cltv_expiry);
-}
-
 void towire_fulfilled_htlc(u8 **pptr, const struct fulfilled_htlc *fulfilled)
 {
 	towire_u64(pptr, fulfilled->id);
@@ -217,18 +195,6 @@ struct existing_htlc *fromwire_existing_htlc(const tal_t *ctx,
 	return existing;
 }
 
-struct simple_htlc *fromwire_simple_htlc(const tal_t *ctx,
-					 const u8 **cursor, size_t *max)
-{
-	struct simple_htlc *simple = tal(ctx, struct simple_htlc);
-
-	simple->side = fromwire_side(cursor, max);
-	simple->amount = fromwire_amount_msat(cursor, max);
-	fromwire_sha256(cursor, max, &simple->payment_hash);
-	simple->cltv_expiry = fromwire_u32(cursor, max);
-	return simple;
-}
-
 void fromwire_fulfilled_htlc(const u8 **cursor, size_t *max,
 			     struct fulfilled_htlc *fulfilled)
 {

common/htlc_wire.h

@@ -60,14 +60,6 @@ struct changed_htlc {
 	u64 id;
 };
 
-/* For signing interfaces */
-struct simple_htlc {
-	enum side side;
-	struct amount_msat amount;
-	struct sha256 payment_hash;
-	u32 cltv_expiry;
-};
-
 struct existing_htlc *new_existing_htlc(const tal_t *ctx,
 					u64 id,
 					enum htlc_state state,
@@ -79,15 +71,8 @@ struct existing_htlc *new_existing_htlc(const tal_t *ctx,
 					const struct preimage *preimage TAKES,
 					const struct failed_htlc *failed TAKES);
 
-struct simple_htlc *new_simple_htlc(const tal_t *ctx,
-				    enum side side,
-				    struct amount_msat amount,
-				    const struct sha256 *payment_hash,
-				    u32 cltv_expiry);
-
 void towire_added_htlc(u8 **pptr, const struct added_htlc *added);
 void towire_existing_htlc(u8 **pptr, const struct existing_htlc *existing);
-void towire_simple_htlc(u8 **pptr, const struct simple_htlc *simple);
 void towire_fulfilled_htlc(u8 **pptr, const struct fulfilled_htlc *fulfilled);
 void towire_failed_htlc(u8 **pptr, const struct failed_htlc *failed);
 void towire_changed_htlc(u8 **pptr, const struct changed_htlc *changed);
@@ -98,8 +83,6 @@ void fromwire_added_htlc(const u8 **cursor, size_t *max,
 			 struct added_htlc *added);
 struct existing_htlc *fromwire_existing_htlc(const tal_t *ctx,
 					     const u8 **cursor, size_t *max);
-struct simple_htlc *fromwire_simple_htlc(const tal_t *ctx,
-					 const u8 **cursor, size_t *max);
 void fromwire_fulfilled_htlc(const u8 **cursor, size_t *max,
 			     struct fulfilled_htlc *fulfilled);
 struct failed_htlc *fromwire_failed_htlc(const tal_t *ctx, const u8 **cursor,

hsmd/hsmd_wire.csv

@@ -229,6 +229,13 @@ msgdata,hsmd_sign_commitment_tx,commit_num,u64,
 msgtype,hsmd_sign_commitment_tx_reply,105
 msgdata,hsmd_sign_commitment_tx_reply,sig,bitcoin_signature,
 
+#include <common/htlc_wire.h> // For enum side and towire_side
+subtype,simple_htlc
+subtypedata,simple_htlc,side,enum side,
+subtypedata,simple_htlc,amount,amount_msat,
+subtypedata,simple_htlc,payment_hash,sha256,
+subtypedata,simple_htlc,cltv_expiry,u32,
+
 # Validate the counterparty's commitment signatures.
 msgtype,hsmd_validate_commitment_tx,35
 msgdata,hsmd_validate_commitment_tx,tx,bitcoin_tx,
@@ -290,7 +297,6 @@ msgdata,hsmd_sign_local_htlc_tx,wscript,u8,wscript_len
 msgdata,hsmd_sign_local_htlc_tx,option_anchor_outputs,bool,
 
 # Openingd/channeld asks HSM to sign the other sides' commitment tx.
-#include <common/htlc_wire.h>
 msgtype,hsmd_sign_remote_commitment_tx,19
 msgdata,hsmd_sign_remote_commitment_tx,tx,bitcoin_tx,
 msgdata,hsmd_sign_remote_commitment_tx,remote_funding_key,pubkey,