diff --git a/activitypub.c b/activitypub.c
index 8ee7b3d..7701ecf 100644
--- a/activitypub.c
+++ b/activitypub.c
@@ -122,6 +122,9 @@ void process_message(snac *snac, char *msg)
     char *actor = xs_dict_get(msg, "actor");
     char *type  = xs_dict_get(msg, "type");
 
+    /* check the signature */
+    /* ... */
+
     if (strcmp(type, "Follow") == 0) {
     }
     else
@@ -179,7 +182,7 @@ void process_queue(snac *snac)
                     snac_log(snac, xs_fmt("process_queue giving up %s %d", actor, status));
                 else {
                     /* reenqueue */
-                    enqueue_output(snac, actor, msg, retries + 1);
+                    enqueue_output(snac, msg, actor, retries + 1);
                     snac_log(snac, xs_fmt("process_queue requeue %s %d", actor, retries + 1));
                 }
             }
@@ -292,14 +295,11 @@ int activitypub_post_handler(d_char *req, char *q_path,
         return 404;
     }
 
-    /* signature checking should happen here */
-    /* ... */
-
     /* decode */
     xs *msg = xs_json_loads(payload);
 
     if (msg && xs_dict_get(msg, "actor") && xs_dict_get(msg, "type"))
-        enqueue_input(&snac, msg);
+        enqueue_input(&snac, msg, req);
     else {
         srv_log(xs_fmt("activitypub_post_handler JSON error %s", q_path));
         status = 400;
diff --git a/data.c b/data.c
index 67b1802..c3576cc 100644
--- a/data.c
+++ b/data.c
@@ -709,12 +709,12 @@ int actor_get(snac *snac, char *actor, d_char **data)
 }
 
 
-void enqueue_input(snac *snac, char *msg)
+void enqueue_input(snac *snac, char *msg, char *req)
 /* enqueues an input message */
 {
     xs *ntid = tid(0);
     xs *fn   = xs_fmt("%s/queue/%s.json", snac->basedir, ntid);
-    xs *tfn  = xs_str_cat(fn, ".tmp");
+    xs *tfn  = xs_fmt("%s.tmp", fn);
     FILE *f;
 
     if ((f = fopen(tfn, "w")) != NULL) {
@@ -723,6 +723,7 @@ void enqueue_input(snac *snac, char *msg)
 
         qmsg = xs_dict_append(qmsg, "type",   "input");
         qmsg = xs_dict_append(qmsg, "object", msg);
+        qmsg = xs_dict_append(qmsg, "req",    req);
 
         j = xs_json_dumps_pp(qmsg, 4);
 
@@ -736,7 +737,7 @@ void enqueue_input(snac *snac, char *msg)
 }
 
 
-void enqueue_output(snac *snac, char *actor, char *msg, int retries)
+void enqueue_output(snac *snac, char *msg, char *actor, int retries)
 /* enqueues an output message for an actor */
 {
     if (strcmp(actor, snac->actor) == 0) {
@@ -747,7 +748,7 @@ void enqueue_output(snac *snac, char *actor, char *msg, int retries)
     int qrt  = xs_number_get(xs_dict_get(srv_config, "query_retry_minutes"));
     xs *ntid = tid(retries * 60 * qrt);
     xs *fn   = xs_fmt("%s/queue/%s.json", snac->basedir, ntid);
-    xs *tfn  = xs_str_cat(fn, ".tmp");
+    xs *tfn  = xs_fmt("%s.tmp", fn);
     FILE *f;
 
     if ((f = fopen(tfn, "w")) != NULL) {
diff --git a/snac.h b/snac.h
index c750c75..b76d7e9 100644
--- a/snac.h
+++ b/snac.h
@@ -64,8 +64,8 @@ int is_muted(snac *snac, char *actor);
 int actor_add(snac *snac, char *actor, char *msg);
 int actor_get(snac *snac, char *actor, d_char **data);
 
-void enqueue_input(snac *snac, char *msg);
-void enqueue_output(snac *snac, char *actor, char *msg, int retries);
+void enqueue_input(snac *snac, char *msg, char *req);
+void enqueue_output(snac *snac, char *msg, char *actor, int retries);
 
 d_char *queue(snac *snac);
 d_char *dequeue(snac *snac, char *fn);