Updates and use the var hooks

include/blockchain_vars.hrl

@@ -170,7 +170,7 @@
 %% determines which hexing type to use for gateways: hex_h3dex | h3dex or not set
 %% hex_h3dex will result in both hexes and h3dex being updated
 %% h3dex will result in only h3dex being updated
-%% not set will result in hexes being updated
+%% not set will result in both hexes and h3dex being updated
 -define(poc_hexing_type, poc_hexing_type).
 
 %% max number of hexes to GC in the h3dex per block: integer

src/ledger/v1/blockchain_ledger_v1.erl

@@ -4416,7 +4416,7 @@ add_gw_to_h3dex(Hex, GWAddr, Res, Ledger) ->
     BinHex = h3_to_key(Hex),
     case cache_get(Ledger, H3CF, BinHex, []) of
         not_found ->
-            case count_gateways_in_hex(h3:parent(Hex, 5), Ledger) of
+            case count_gateways_in_hex(h3:parent(Hex, Res), Ledger) of
                 0 ->
                     %% populating a hex means we need to recalculate the set of populated
                     %% hexes

src/transactions/v1/blockchain_txn_vars_v1.erl

@@ -687,10 +687,40 @@ process_hooks(Vars, Unsets, Ledger) ->
 %% Separate out hook functions and call them in separate functions below the hook section.
 
 -spec var_hook(Var :: atom(), Value :: any(), Ledger :: blockchain_ledger_v1:ledger()) -> ok.
+var_hook(?poc_targeting_version, 4, Ledger) ->
+    %% v4 targeting enabled, build the h3dex lookup
+    {ok, Res} = blockchain_ledger_v1:config(?poc_target_hex_parent_res, Ledger),
+    blockchain_ledger_v1:build_random_hex_targeting_lookup(Res, Ledger),
+    ok;
+var_hook(?poc_targeting_version, 3, Ledger) ->
+    %% v3 targeting enabled, remove the h3dex lookup
+    blockchain_ledger_v1:clean_random_hex_targeting_lookup(Ledger),
+    ok;
+var_hook(?poc_target_hex_parent_res, Value, Ledger) ->
+    %% targeting resolution changed, rebuild h3dex lookup
+    blockchain_ledger_v1:clean_random_hex_targeting_lookup(Ledger),
+    blockchain_ledger_v1:build_random_hex_targeting_lookup(Value, Ledger),
+    ok;
+var_hook(?poc_hexing_type, h3dex, Ledger) ->
+    %% the hexes keys should be safe to remove now
+    blockchain_ledger_v1:clean_all_hexes(Ledger),
+    ok;
+var_hook(?poc_hexing_type, hex_h3dex, Ledger) ->
+    %% rebuild hexes since we're back to updating them
+    blockchain:bootstrap_hexes(Ledger),
+    ok;
 var_hook(_Var, _Value, _Ledger) ->
     ok.
 
 -spec unset_hook(Var :: atom(), Ledger :: blockchain_ledger_v1:ledger()) -> ok.
+unset_hook(?poc_targeting_version, Ledger) ->
+    %% going back to the default, which is v3 so remove the h3dex lookup
+    blockchain_ledger_v1:clean_random_hex_targeting_lookup(Ledger),
+    ok;
+unset_hook(?poc_hexing_type, Ledger) ->
+    %% rebuild hexes since we're back to updating them
+    blockchain:bootstrap_hexes(Ledger),
+    ok;
 unset_hook(_Var, _Ledger) ->
     ok.