diff -r d221757574c1 -r 4722cd3437cb razor.h
--- a/razor.h	Thu Feb 21 12:09:13 2008 -0500
+++ b/razor.h	Fri Feb 29 11:53:15 2008 -0500
@@ -21,6 +21,7 @@
 	RAZOR_VERSION_GREATER_OR_EQUAL,
 	RAZOR_VERSION_GREATER
 };
+extern const char * const razor_version_relations[];
 
 struct razor_set *razor_set_create(void);
 struct razor_set *razor_set_open(const char *filename);
@@ -62,11 +63,6 @@
 void razor_set_list_package_files(struct razor_set *set, const char *name);
 
 void razor_set_list_unsatisfied(struct razor_set *set);
-struct razor_set *razor_set_update(struct razor_set *set,
-				   struct razor_set *upstream,
-				   int count, const char **packages);
-struct razor_set *razor_set_remove(struct razor_set *set,
-				   int count, const char **packages);
 
 typedef void (*razor_package_callback_t)(const char *name,
 					 const char *old_version,
@@ -76,6 +72,51 @@
 razor_set_diff(struct razor_set *set, struct razor_set *upstream,
 	       razor_package_callback_t callback, void *data);
 
+/* Package transactions */
+
+enum razor_transaction_package_state {
+	/* Basic states */
+	RAZOR_PACKAGE_INSTALL       = 0x01,
+	RAZOR_PACKAGE_REMOVE        = 0x02,
+
+	/* (Flags used to define the error states) */
+	RAZOR_PACKAGE_UNAVAILABLE   = 0x04,
+	RAZOR_PACKAGE_UNSATISFIABLE = 0x08,
+	RAZOR_PACKAGE_BLOCKED       = 0x10,
+
+	/* Error states */
+	RAZOR_PACKAGE_INSTALL_UNAVAILABLE   = RAZOR_PACKAGE_INSTALL | RAZOR_PACKAGE_UNAVAILABLE,
+	RAZOR_PACKAGE_INSTALL_UNSATISFIABLE = RAZOR_PACKAGE_INSTALL | RAZOR_PACKAGE_UNSATISFIABLE,
+	RAZOR_PACKAGE_INSTALL_BLOCKED = RAZOR_PACKAGE_INSTALL | RAZOR_PACKAGE_BLOCKED,
+	RAZOR_PACKAGE_REMOVE_NOT_INSTALLED  = RAZOR_PACKAGE_REMOVE | RAZOR_PACKAGE_UNAVAILABLE,
+	RAZOR_PACKAGE_REMOVE_BLOCKED  = RAZOR_PACKAGE_REMOVE | RAZOR_PACKAGE_BLOCKED
+};
+
+struct razor_transaction_package {
+	struct razor_package *package;
+	const char *name, *version;
+	enum razor_transaction_package_state state;
+
+	const char *req_package;
+	const char *req_property;
+	enum razor_version_relation req_relation;
+	const char *req_version;
+};
+
+struct razor_transaction {
+	int package_count, errors;
+	struct razor_transaction_package *packages;
+
+	struct razor_set *system, *upstream;
+};
+
+struct razor_transaction *
+razor_transaction_create(struct razor_set *system, struct razor_set *upstream,
+			 int update_count, const char **update_packages,
+			 int remove_count, const char **remove_packages);
+void razor_transaction_describe(struct razor_transaction *trans);
+struct razor_set *razor_transaction_run(struct razor_transaction *trans);
+void razor_transaction_destroy(struct razor_transaction *trans);
 
 /* Importer interface; for building a razor set from external sources,
  * like yum, rpmdb or razor package files. */