db: add runes tables and accessors.

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

wallet/db.c

@@ -956,6 +956,8 @@ static struct migration dbmigrations[] = {
     {NULL, migrate_fill_in_channel_type},
     {SQL("ALTER TABLE peers ADD feature_bits BLOB DEFAULT NULL;"), NULL},
     {NULL, migrate_normalize_invstr},
+    {SQL("CREATE TABLE runes (id BIGSERIAL, rune TEXT, PRIMARY KEY (id));"), NULL},
+    {SQL("CREATE TABLE runes_blacklist (start_index BIGINT, end_index BIGINT);"), NULL},
 };
 
 /**

wallet/wallet.c

@@ -5465,3 +5465,55 @@ struct wallet_htlc_iter *wallet_htlcs_next(struct wallet *w,
 	*hstate = db_col_int(iter->stmt, "h.hstate");
 	return iter;
 }
+
+struct rune_blacklist *wallet_get_runes_blacklist(const tal_t *ctx, struct wallet *wallet)
+{
+	struct db_stmt *stmt;
+	struct rune_blacklist *blist = tal_arr(ctx, struct rune_blacklist, 0);
+
+	stmt = db_prepare_v2(wallet->db, SQL("SELECT start_index, end_index FROM runes_blacklist"));
+	db_query_prepared(stmt);
+
+	while (db_step(stmt)) {
+		struct rune_blacklist b;
+		b.start = db_col_u64(stmt, "start_index");
+		b.end = db_col_u64(stmt, "end_index");
+		tal_arr_expand(&blist, b);
+	}
+	tal_free(stmt);
+	return blist;
+}
+
+const char *wallet_get_rune(const tal_t *ctx, struct wallet *wallet, u64 unique_id)
+{
+	struct db_stmt *stmt;
+	const char *runestr;
+
+	stmt = db_prepare_v2(wallet->db, SQL("SELECT rune FROM runes WHERE id = ?"));
+	db_bind_u64(stmt, unique_id);
+	db_query_prepared(stmt);
+
+	if (db_step(stmt))
+		runestr = db_col_strdup(ctx, stmt, "rune");
+	else
+		runestr = NULL;
+	tal_free(stmt);
+	return runestr;
+}
+
+const char **wallet_get_runes(const tal_t *ctx, struct wallet *wallet)
+{
+	struct db_stmt *stmt;
+	const char **strs = tal_arr(ctx, const char *, 0);
+
+	stmt = db_prepare_v2(wallet->db, SQL("SELECT rune FROM runes"));
+	db_query_prepared(stmt);
+
+	while (db_step(stmt)) {
+		const char *str = db_col_strdup(strs, stmt, "rune");
+		tal_arr_expand(&strs, str);
+	}
+	tal_free(stmt);
+	return strs;
+}
+

wallet/wallet.h

@@ -1524,4 +1524,34 @@ struct wally_psbt *psbt_using_utxos(const tal_t *ctx,
 				    u32 nlocktime,
 				    u32 nsequence,
 				    struct wally_psbt *base);
+
+/**
+ * Get a particular runestring from the db
+ * @ctx: tal ctx for return to be tallocated from
+ * @wallet: the wallet
+ * @unique_id: the id of the rune.
+ *
+ * Returns NULL if it's not found.
+ */
+const char *wallet_get_rune(const tal_t *ctx, struct wallet *wallet, u64 unique_id);
+
+/**
+ * Get every runestring from the db
+ * @ctx: tal ctx for return to be tallocated from
+ * @wallet: the wallet
+ */
+const char **wallet_get_runes(const tal_t *ctx, struct wallet *wallet);
+
+/* Load the runes blacklist */
+struct rune_blacklist {
+	u64 start, end;
+};
+
+/**
+ * Load the blacklist from the db.
+ * @ctx: tal ctx for return to be tallocated from
+ * @wallet: the wallet
+ */
+struct rune_blacklist *wallet_get_runes_blacklist(const tal_t *ctx, struct wallet *wallet);
+
 #endif /* LIGHTNING_WALLET_WALLET_H */