Remove knowledge of tuple length from ledger value

Nothing should now care about the current tuple length - and hence the tuple length may be increased (for example to add a max_mod_date)

src/leveled_bookie.erl

@@ -1116,7 +1116,7 @@ handle_call({get, Bucket, Key, Tag}, _From, State)
                 not_found;
             Head ->
                 {Seqn, Status, _MH, _MD} = 
-                    leveled_codec:striphead_to_details(Head),
+                    leveled_codec:striphead_to_v1details(Head),
                 case Status of
                     tomb ->
                         not_found;
@@ -1165,7 +1165,7 @@ handle_call({head, Bucket, Key, Tag}, _From, State)
             not_present ->
                 {not_found, State#state.ink_checking};
             Head ->
-                case leveled_codec:striphead_to_details(Head) of
+                case leveled_codec:striphead_to_v1details(Head) of
                     {_SeqN, tomb, _MH, _MD} ->
                         {not_found, State#state.ink_checking};
                     {SeqN, {active, TS}, _MH, MD} ->

src/leveled_codec.erl

@@ -38,7 +38,7 @@
         strip_to_statusonly/1,
         strip_to_keyseqonly/1,
         strip_to_seqnhashonly/1,
-        striphead_to_details/1,
+        striphead_to_v1details/1,
         is_active/3,
         endkey_passed/2,
         key_dominates/2,
@@ -167,36 +167,35 @@ to_lookup(Key) ->
 %% Some helper functions to get a sub_components of the key/value
 
 -spec strip_to_statusonly(ledger_kv()) -> ledger_status().
-strip_to_statusonly({_, {_, St, _, _}}) -> St.
+strip_to_statusonly({_, V}) -> element(2, V).
 
 -spec strip_to_seqonly(ledger_kv()) -> non_neg_integer().
-strip_to_seqonly({_, {SeqN, _, _, _}}) -> SeqN.
+strip_to_seqonly({_, V}) -> element(1, V).
 
 -spec strip_to_keyseqonly(ledger_kv()) -> {ledger_key(), integer()}.
-strip_to_keyseqonly({LK, {SeqN, _, _, _}}) -> {LK, SeqN}.
+strip_to_keyseqonly({LK, V}) -> {LK, element(1, V)}.
 
 -spec strip_to_seqnhashonly(ledger_kv()) -> {integer(), segment_hash()}.
-strip_to_seqnhashonly({_, {SeqN, _, MH, _}}) -> {SeqN, MH}.
+strip_to_seqnhashonly({_, V}) -> {element(1, V), element(3, V)}.
 
--spec striphead_to_details(ledger_value()) -> ledger_value().
-striphead_to_details({SeqN, St, MH, MD}) -> {SeqN, St, MH, MD}.
+-spec striphead_to_v1details(ledger_value()) -> ledger_value().
+striphead_to_v1details(V) -> 
+    {element(1, V), element(2, V), element(3, V), element(4, V)}.
 
 -spec key_dominates(ledger_kv(), ledger_kv()) -> 
     left_hand_first|right_hand_first|left_hand_dominant|right_hand_dominant.
 %% @doc
 %% When comparing two keys in the ledger need to find if one key comes before 
 %% the other, or if the match, which key is "better" and should be the winner
-key_dominates(LeftKey, RightKey) ->
-    case {LeftKey, RightKey} of
-        {{LK, _LVAL}, {RK, _RVAL}} when LK < RK ->
-            left_hand_first;
-        {{LK, _LVAL}, {RK, _RVAL}} when RK < LK ->
-            right_hand_first;
-        {{LK, {LSN, _LST, _LMH, _LMD}}, {RK, {RSN, _RST, _RMH, _RMD}}}
-                                                when LK == RK, LSN >= RSN ->
+key_dominates({LK, _LVAL}, {RK, _RVAL}) when LK < RK ->
+    left_hand_first;
+key_dominates({LK, _LVAL}, {RK, _RVAL}) when RK < LK ->
+    right_hand_first;
+key_dominates(LObj, RObj) ->
+    case strip_to_seqonly(LObj) >= strip_to_seqonly(RObj) of
+        true ->
             left_hand_dominant;
-        {{LK, {LSN, _LST, _LMH, _LMD}}, {RK, {RSN, _RST, _RMH, _RMD}}}
-                                                when LK == RK, LSN < RSN ->
+        false ->
             right_hand_dominant
     end.
 

src/leveled_runner.erl

@@ -612,7 +612,7 @@ accumulate_objects(FoldObjectsFun, InkerClone, Tag, DeferredFetch) ->
             case leveled_codec:is_active(LK, V, Now) of
                 true ->
                     {SQN, _St, _MH, MD} =
-                        leveled_codec:striphead_to_details(V),
+                        leveled_codec:striphead_to_v1details(V),
                     {B, K} =
                         case leveled_codec:from_ledgerkey(LK) of
                             {B0, K0} ->