     <cuckoo-buckets> sha1 0 cuckoo-filter boa ;
 
 :: cuckoo-insert ( bytes cuckoo-filter -- ? )
-    bytes cuckoo-filter tag-indices :> ( tag! i1 i2 )
+    bytes cuckoo-filter hash-indices :> ( fp! i1 i2 )
     cuckoo-filter buckets>> :> buckets
     buckets length :> n
     {
-        [ tag i1 n mod buckets nth bucket-insert ]
-        [ tag i2 n mod buckets nth bucket-insert ]
+        [ fp i1 n mod buckets nth bucket-insert ]
+        [ fp i2 n mod buckets nth bucket-insert ]
     } 0|| [
         cuckoo-filter [ 1 + ] change-size drop t
     ] [
         2 random zero? i1 i2 ? :> i!
         max-cuckoo-count [
             drop
-            tag i n mod buckets nth bucket-swap tag!
-            tag i alt-index i!
+            fp i n mod buckets nth bucket-swap fp!
+            fp i alt-index i!
 
-            tag i n mod buckets nth bucket-insert
+            fp i n mod buckets nth bucket-insert
             dup [ cuckoo-filter [ 1 + ] change-size drop ] when
         ] find-integer >boolean
     ] if ;
 
 :: cuckoo-lookup ( bytes cuckoo-filter -- ? )
-    bytes cuckoo-filter tag-indices :> ( tag i1 i2 )
+    bytes cuckoo-filter hash-indices :> ( fp i1 i2 )
     cuckoo-filter buckets>> :> buckets
     buckets length :> n
     {
-        [ tag i1 n mod buckets nth bucket-lookup ]
-        [ tag i2 n mod buckets nth bucket-lookup ]
+        [ fp i1 n mod buckets nth bucket-lookup ]
+        [ fp i2 n mod buckets nth bucket-lookup ]
     } 0|| ;
 
 :: cuckoo-delete ( bytes cuckoo-filter -- ? )
-    bytes cuckoo-filter tag-indices :> ( tag i1 i2 )
+    bytes cuckoo-filter hash-indices :> ( fp i1 i2 )
     cuckoo-filter buckets>> :> buckets
     buckets length :> n
     {
-        [ tag i1 n mod buckets nth bucket-delete ]
-        [ tag i2 n mod buckets nth bucket-delete ]
+        [ fp i1 n mod buckets nth bucket-delete ]
+        [ fp i2 n mod buckets nth bucket-delete ]
     } 0||
     dup [ cuckoo-filter [ 1 - ] change-size drop ] when ;

: <cuckoo-buckets> ( capacity -- buckets )
    #buckets [ bucket-size f <array> ] replicate ;

: tag-index ( hash -- tag index )
    4 over <displaced-alien> [ uint deref ] bi@ ;

: alt-index ( tag index -- altindex )
    [ 0x5bd1e995 w* ] [ bitxor ] bi* ;

: tag-indices ( bytes cuckoo-filter -- tag i1 i2 )
    checksum>> checksum-bytes tag-index 2dup alt-index ;

: bucket-lookup ( fingerprint bucket -- ? )
    member? ;

! The maximum load factor we allow before growing the capacity
CONSTANT: max-load-factor 0.96

! The number of fingerprint to store in each bucket
CONSTANT: bucket-size 4

: #buckets ( capacity -- #buckets )
