refactor: rename filter to logFilter

ethers/providers/jsonrpc/subscriptions.nim

@@ -140,7 +140,7 @@ type
     # We need to keep around the filters that are used to create log filters on the RPC node
     # as there might be a time when they need to be recreated as RPC node might prune/forget
     # about them
-    filters: Table[JsonNode, EventFilter]
+    logFilters: Table[JsonNode, EventFilter]
 
     # Used when filters are recreated to translate from the id that user
     # originally got returned to new filter id
@@ -168,10 +168,11 @@ proc new*(_: type JsonRpcSubscriptions,
     except CatchableError as e:
       if "filter not found" in e.msg:
         var newId: JsonNode
-        # If there exists filter for given ID, then the filter was a log filter
-        # otherwise it was a block filter
-        if subscriptions.filters.hasKey(originalId):
-          let filter = subscriptions.filters[originalId]
+        # Log filters are stored in logFilters, block filters are not persisted
+        # there is they do not need any specific data for their recreation.
+        # We use this to determine if the filter was log or block filter here.
+        if subscriptions.logFilters.hasKey(originalId):
+          let filter = subscriptions.logFilters[originalId]
           newId = await subscriptions.client.eth_newFilter(filter)
         else:
           newId = await subscriptions.client.eth_newBlockFilter()
@@ -231,14 +232,14 @@ method subscribeLogs(subscriptions: PollingSubscriptions,
 
   let id = await subscriptions.client.eth_newFilter(filter)
   subscriptions.callbacks[id] = callback
-  subscriptions.filters[id] = filter
+  subscriptions.logFilters[id] = filter
   subscriptions.subscriptionMapping[id] = id
   return id
 
 method unsubscribe*(subscriptions: PollingSubscriptions,
                    id: JsonNode)
                   {.async.} =
-  subscriptions.filters.del(id)
+  subscriptions.logFilters.del(id)
   subscriptions.callbacks.del(id)
   let sub = subscriptions.subscriptionMapping[id]
   subscriptions.subscriptionMapping.del(id)

testmodule/providers/jsonrpc/testJsonRpcSubscriptions.nim

@@ -128,14 +128,14 @@ suite "HTTP polling subscriptions - filter not found":
     let filter = EventFilter(address: Address.example, topics: @[array[32, byte].example])
     let emptyHandler = proc(log: Log) = discard
 
-    check subscriptions.filters.len == 0
+    check subscriptions.logFilters.len == 0
     check subscriptions.subscriptionMapping.len == 0
 
     let id = await subscriptions.subscribeLogs(filter, emptyHandler)
 
-    check subscriptions.filters[id] == filter
+    check subscriptions.logFilters[id] == filter
     check subscriptions.subscriptionMapping[id] == id
-    check subscriptions.filters.len == 1
+    check subscriptions.logFilters.len == 1
     check subscriptions.subscriptionMapping.len == 1
 
     mockServer.invalidateFilter(id)
@@ -151,7 +151,7 @@ suite "HTTP polling subscriptions - filter not found":
 
     await subscriptions.unsubscribe(id)
 
-    check not subscriptions.filters.hasKey id
+    check not subscriptions.logFilters.hasKey id
     check not subscriptions.subscriptionMapping.hasKey id
 
   test "filter not found error recreates block filter":