diff --git a/pkg/urbit/include/noun/retrieve.h b/pkg/urbit/include/noun/retrieve.h
index 295ad622af..8eb6ed880f 100644
--- a/pkg/urbit/include/noun/retrieve.h
+++ b/pkg/urbit/include/noun/retrieve.h
@@ -346,21 +346,22 @@
                   c3_y*   c_y,
                   u3_atom d);
 
-      /* u3r_unpack():
+      /* u3r_bytes_fit():
       **
       **   Copy (len_w) bytes of (a) into (buf_y) if it fits, returning overage
       */
         c3_w
-        u3r_unpack(c3_w len_w,
-                   c3_y *buf_y,
-                   u3_atom a);
+        u3r_bytes_fit(c3_w    len_w,
+                      c3_y*   buf_y,
+                      u3_atom a);
 
-      /* u3r_unpack_alloc():
+      /* u3r_bytes_all():
       **
       **  Allocate a new byte array with all the bytes of (a)
       */
         c3_y*
-        u3r_unpack_alloc(c3_w* len_w, u3_atom a);
+        u3r_bytes_all(c3_w*   len_w,
+                      u3_atom a);
 
       /* u3r_chop():
       **
diff --git a/pkg/urbit/jets/e/aes_cbc.c b/pkg/urbit/jets/e/aes_cbc.c
index 19e1291322..06d9df3811 100644
--- a/pkg/urbit/jets/e/aes_cbc.c
+++ b/pkg/urbit/jets/e/aes_cbc.c
@@ -25,7 +25,7 @@ typedef c3_y* (*urcrypt_cbc)(const c3_y*,
 
     u3r_bytes(0, 16, iv_y, iv);
 
-    msg_y = u3r_unpack_alloc(&met_w, msg);
+    msg_y = u3r_bytes_all(&met_w, msg);
     out_y = (*low_f)(msg_y, met_w, key_y, iv_y, &len);
     u3a_free(msg_y);
 
diff --git a/pkg/urbit/jets/e/ed_add_double_scalarmult.c b/pkg/urbit/jets/e/ed_add_double_scalarmult.c
index e49a0bf168..af73d59644 100644
--- a/pkg/urbit/jets/e/ed_add_double_scalarmult.c
+++ b/pkg/urbit/jets/e/ed_add_double_scalarmult.c
@@ -14,10 +14,10 @@
   {
     c3_y a_y[32], b_y[32], c_y[32], d_y[32], out_y[32];
 
-    if ( (0 != u3r_unpack(32, a_y, a)) ||
-         (0 != u3r_unpack(32, b_y, b)) ||
-         (0 != u3r_unpack(32, c_y, c)) ||
-         (0 != u3r_unpack(32, d_y, d)) ||
+    if ( (0 != u3r_bytes_fit(32, a_y, a)) ||
+         (0 != u3r_bytes_fit(32, b_y, b)) ||
+         (0 != u3r_bytes_fit(32, c_y, c)) ||
+         (0 != u3r_bytes_fit(32, d_y, d)) ||
          (0 != urcrypt_ed_add_double_scalarmult(a_y, b_y, c_y, d_y, out_y)) ) {
       return u3_none;
     }
diff --git a/pkg/urbit/jets/e/ed_add_scalarmult_scalarmult_base.c b/pkg/urbit/jets/e/ed_add_scalarmult_scalarmult_base.c
index 0a0e2d2d48..2db437aec4 100644
--- a/pkg/urbit/jets/e/ed_add_scalarmult_scalarmult_base.c
+++ b/pkg/urbit/jets/e/ed_add_scalarmult_scalarmult_base.c
@@ -13,9 +13,9 @@
   {
     c3_y a_y[32], b_y[32], c_y[32], out_y[32];
 
-    if ( (0 != u3r_unpack(32, a_y, a)) ||
-         (0 != u3r_unpack(32, b_y, b)) ||
-         (0 != u3r_unpack(32, c_y, c)) ||
+    if ( (0 != u3r_bytes_fit(32, a_y, a)) ||
+         (0 != u3r_bytes_fit(32, b_y, b)) ||
+         (0 != u3r_bytes_fit(32, c_y, c)) ||
          (0 != urcrypt_ed_add_scalarmult_scalarmult_base(a_y, b_y, c_y, out_y)) ) {
       return u3_none;
     }
diff --git a/pkg/urbit/jets/e/ed_point_add.c b/pkg/urbit/jets/e/ed_point_add.c
index a93f798b30..2a5da29384 100644
--- a/pkg/urbit/jets/e/ed_point_add.c
+++ b/pkg/urbit/jets/e/ed_point_add.c
@@ -13,8 +13,8 @@
   {
     c3_y a_y[32], b_y[32], out_y[32];
 
-    if ( (0 != u3r_unpack(32, a_y, a)) ||
-         (0 != u3r_unpack(32, b_y, b)) ||
+    if ( (0 != u3r_bytes_fit(32, a_y, a)) ||
+         (0 != u3r_bytes_fit(32, b_y, b)) ||
          (0 != urcrypt_ed_point_add(a_y, b_y, out_y)) ) {
       return u3_none;
     }
diff --git a/pkg/urbit/jets/e/ed_puck.c b/pkg/urbit/jets/e/ed_puck.c
index 8257b937ec..436650e1ab 100644
--- a/pkg/urbit/jets/e/ed_puck.c
+++ b/pkg/urbit/jets/e/ed_puck.c
@@ -11,7 +11,7 @@
   {
     c3_y sed_y[32];
 
-    if ( 0 != u3r_unpack(32, sed_y, sed) ) {
+    if ( 0 != u3r_bytes_fit(32, sed_y, sed) ) {
       // hoon explicitly crashes on mis-size
       return u3m_bail(c3__exit);
     }
diff --git a/pkg/urbit/jets/e/ed_scalarmult.c b/pkg/urbit/jets/e/ed_scalarmult.c
index 224fba3f6d..97c88c4f67 100644
--- a/pkg/urbit/jets/e/ed_scalarmult.c
+++ b/pkg/urbit/jets/e/ed_scalarmult.c
@@ -12,8 +12,8 @@
   {
     c3_y a_y[32], b_y[32], out_y[32];
 
-    if ( (0 != u3r_unpack(32, a_y, a)) ||
-         (0 != u3r_unpack(32, b_y, b)) ||
+    if ( (0 != u3r_bytes_fit(32, a_y, a)) ||
+         (0 != u3r_bytes_fit(32, b_y, b)) ||
          (0 != urcrypt_ed_scalarmult(a_y, b_y, out_y)) ) {
       // hoon does not check size of inputs
       return u3_none;
diff --git a/pkg/urbit/jets/e/ed_scalarmult_base.c b/pkg/urbit/jets/e/ed_scalarmult_base.c
index c1b641bd95..9756e65a5a 100644
--- a/pkg/urbit/jets/e/ed_scalarmult_base.c
+++ b/pkg/urbit/jets/e/ed_scalarmult_base.c
@@ -11,7 +11,7 @@
   {
     c3_y a_y[32];
 
-    if ( 0 != u3r_unpack(32, a_y, a) ) {
+    if ( 0 != u3r_bytes_fit(32, a_y, a) ) {
       return u3_none;
     }
     else {
diff --git a/pkg/urbit/jets/e/ed_shar.c b/pkg/urbit/jets/e/ed_shar.c
index 5ed28df377..7db4e61752 100644
--- a/pkg/urbit/jets/e/ed_shar.c
+++ b/pkg/urbit/jets/e/ed_shar.c
@@ -9,11 +9,11 @@
   {
     c3_y pub_y[32], sek_y[32];
 
-    if ( 0 != u3r_unpack(32, pub_y, pub) ) {
+    if ( 0 != u3r_bytes_fit(32, pub_y, pub) ) {
       // pub is not size checked in the hoon
       return u3_none;
     }
-    else if ( 0 != u3r_unpack(32, sek_y, sek) ) {
+    else if ( 0 != u3r_bytes_fit(32, sek_y, sek) ) {
       // sek explicitly bails through suck
       return u3m_bail(c3__exit);
     }
diff --git a/pkg/urbit/jets/e/ed_sign.c b/pkg/urbit/jets/e/ed_sign.c
index e6a153ba1c..09fd317d06 100644
--- a/pkg/urbit/jets/e/ed_sign.c
+++ b/pkg/urbit/jets/e/ed_sign.c
@@ -12,14 +12,14 @@
   {
     c3_y sed_y[32];
 
-    if ( 0 != u3r_unpack(32, sed_y, b) ) {
+    if ( 0 != u3r_bytes_fit(32, sed_y, b) ) {
       // hoon calls suck, which calls puck, which crashes
       return u3m_bail(c3__exit);
     }
     else {
       c3_y  sig_y[64];
       c3_w  met_w;
-      c3_y* mes_y = u3r_unpack_alloc(&met_w, a);
+      c3_y* mes_y = u3r_bytes_all(&met_w, a);
 
       urcrypt_ed_sign(mes_y, met_w, sed_y, sig_y);
       u3a_free(mes_y);
diff --git a/pkg/urbit/jets/e/ed_veri.c b/pkg/urbit/jets/e/ed_veri.c
index f4bf30ac34..c4a4b6f2df 100644
--- a/pkg/urbit/jets/e/ed_veri.c
+++ b/pkg/urbit/jets/e/ed_veri.c
@@ -13,14 +13,14 @@
   {
     c3_y  sig_y[64], pub_y[32];
 
-    if ( (0 != u3r_unpack(64, sig_y, s)) ||
-         (0 != u3r_unpack(32, pub_y, pk)) ) {
+    if ( (0 != u3r_bytes_fit(64, sig_y, s)) ||
+         (0 != u3r_bytes_fit(32, pub_y, pk)) ) {
       // hoon checks sizes, but weirdly and without crashes
       return u3_none;
     }
     else {
       c3_w  met_w;
-      c3_y* mes_y = u3r_unpack_alloc(&met_w, m);
+      c3_y* mes_y = u3r_bytes_all(&met_w, m);
       c3_t  val_t = urcrypt_ed_veri(mes_y, met_w, pub_y, sig_y);
       u3a_free(mes_y);
 
diff --git a/pkg/urbit/noun/retrieve.c b/pkg/urbit/noun/retrieve.c
index b8f875b862..8354d42436 100644
--- a/pkg/urbit/noun/retrieve.c
+++ b/pkg/urbit/noun/retrieve.c
@@ -1076,12 +1076,12 @@ u3r_bytes(c3_w    a_w,
   }
 }
 
-/* u3r_unpack():
+/* u3r_bytes_fit():
 **
 **  Copy (len_w) bytes of (a) into (buf_y) if it fits, returning overage
 */
 c3_w
-u3r_unpack(c3_w len_w, c3_y *buf_y, u3_atom a)
+u3r_bytes_fit(c3_w len_w, c3_y *buf_y, u3_atom a)
 {
   c3_w met_w = u3r_met(3, a);
   if ( met_w <= len_w ) {
@@ -1093,12 +1093,12 @@ u3r_unpack(c3_w len_w, c3_y *buf_y, u3_atom a)
   }
 }
 
-/* u3r_unpack_alloc():
+/* u3r_bytes_all():
 **
 **  Allocate a new byte array with all the bytes of (a)
 */
 c3_y*
-u3r_unpack_alloc(c3_w* len_w, u3_atom a)
+u3r_bytes_all(c3_w* len_w, u3_atom a)
 {
   c3_w  met_w = u3r_met(3, a);
   c3_y* a_y = u3a_malloc(met_w);