db: add support for remote end specify option_upfront_shutdown_script.

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

lightningd/channel.c

@@ -173,7 +173,8 @@ struct channel *new_channel(struct peer *peer, u64 dbid,
 			    const struct pubkey *local_funding_pubkey,
 			    const struct pubkey *future_per_commitment_point,
 			    u32 feerate_base,
-			    u32 feerate_ppm)
+			    u32 feerate_ppm,
+			    const u8 *remote_upfront_shutdown_script)
 {
 	struct channel *channel = tal(peer->ld, struct channel);
 
@@ -240,6 +241,8 @@ struct channel *new_channel(struct peer *peer, u64 dbid,
 		= tal_steal(channel, future_per_commitment_point);
 	channel->feerate_base = feerate_base;
 	channel->feerate_ppm = feerate_ppm;
+	channel->remote_upfront_shutdown_script
+		= tal_steal(channel, remote_upfront_shutdown_script);
 
 	list_add_tail(&peer->channels, &channel->list);
 	tal_add_destructor(channel, destroy_channel);

lightningd/channel.h

@@ -113,6 +113,9 @@ struct channel {
 
 	/* Feerate per channel */
 	u32 feerate_base, feerate_ppm;
+
+	/* If they used option_upfront_shutdown_script. */
+	const u8 *remote_upfront_shutdown_script;
 };
 
 struct channel *new_channel(struct peer *peer, u64 dbid,
@@ -159,7 +162,9 @@ struct channel *new_channel(struct peer *peer, u64 dbid,
 			    const struct pubkey *local_funding_pubkey,
 			    const struct pubkey *future_per_commitment_point,
 			    u32 feerate_base,
-			    u32 feerate_ppm);
+			    u32 feerate_ppm,
+			    /* NULL or stolen */
+			    const u8 *remote_upfront_shutdown_script);
 
 void delete_channel(struct channel *channel);
 

lightningd/opening_control.c

@@ -225,7 +225,8 @@ wallet_commit_channel(struct lightningd *ld,
 			      &uc->local_funding_pubkey,
 			      NULL,
 			      ld->config.fee_base,
-			      ld->config.fee_per_satoshi);
+			      ld->config.fee_per_satoshi,
+			      NULL);
 
 	/* Now we finally put it in the database. */
 	wallet_channel_insert(ld->wallet, channel);

wallet/db.c

@@ -379,6 +379,7 @@ static struct migration dbmigrations[] = {
 	{ "ALTER TABLE channel_htlcs ADD received_time INTEGER", NULL },
 	{ "ALTER TABLE forwarded_payments ADD received_time INTEGER", NULL },
 	{ "ALTER TABLE forwarded_payments ADD resolved_time INTEGER", NULL },
+	{ "ALTER TABLE channels ADD remote_upfront_shutdown_script BLOB;", NULL },
 };
 
 /* Leak tracking. */

wallet/wallet.c

@@ -685,6 +685,7 @@ static struct channel *wallet_stmt2channel(const tal_t *ctx, struct wallet *w, s
 	ok &= sqlite3_column_pubkey(stmt, 24, &channel_info.old_remote_per_commit);
 	channel_info.feerate_per_kw[LOCAL] = sqlite3_column_int(stmt, 25);
 	channel_info.feerate_per_kw[REMOTE] = sqlite3_column_int(stmt, 26);
+
 	wallet_channel_config_load(w, sqlite3_column_int64(stmt, 4),
 				   &channel_info.their_config);
 
@@ -738,8 +739,8 @@ static struct channel *wallet_stmt2channel(const tal_t *ctx, struct wallet *w, s
 			   &local_basepoints, &local_funding_pubkey,
 			   future_per_commitment_point,
 			   sqlite3_column_int(stmt, 42),
-			   sqlite3_column_int(stmt, 43));
-
+			   sqlite3_column_int(stmt, 43),
+			   sqlite3_column_arr(tmpctx, stmt, 44, u8));
 	return chan;
 }
 
@@ -764,7 +765,7 @@ static const char *channel_fields =
     /*36*/ "min_possible_feerate, max_possible_feerate, "
     /*38*/ "msatoshi_to_us_min, msatoshi_to_us_max, future_per_commitment_point, "
     /*41*/ "last_sent_commit, "
-    /*42*/ "feerate_base, feerate_ppm";
+    /*42*/ "feerate_base, feerate_ppm, remote_upfront_shutdown_script";
 
 bool wallet_channels_load_active(const tal_t *ctx, struct wallet *w)
 {
@@ -984,7 +985,8 @@ void wallet_channel_save(struct wallet *w, struct channel *chan)
 			  "  msatoshi_to_us_min=?,"
 			  "  msatoshi_to_us_max=?,"
 			  "  feerate_base=?,"
-			  "  feerate_ppm=?"
+			  "  feerate_ppm=?,"
+			  "  remote_upfront_shutdown_script=?"
 			  " WHERE id=?");
 	sqlite3_bind_int64(stmt, 1, chan->their_shachain.id);
 	if (chan->scid)
@@ -1026,7 +1028,13 @@ void wallet_channel_save(struct wallet *w, struct channel *chan)
 	sqlite3_bind_amount_msat(stmt, 25, chan->msat_to_us_max);
 	sqlite3_bind_int(stmt, 26, chan->feerate_base);
 	sqlite3_bind_int(stmt, 27, chan->feerate_ppm);
-	sqlite3_bind_int64(stmt, 28, chan->dbid);
+	if (chan->remote_upfront_shutdown_script)
+		sqlite3_bind_blob(stmt, 28, chan->remote_upfront_shutdown_script,
+				  tal_count(chan->remote_upfront_shutdown_script),
+				  SQLITE_TRANSIENT);
+	else
+		sqlite3_bind_null(stmt, 28);
+	sqlite3_bind_int64(stmt, 29, chan->dbid);
 	db_exec_prepared(w->db, stmt);
 
 	wallet_channel_config_save(w, &chan->channel_info.their_config);