Set RPCTranslator to check writing and reading functions

apps/block_scout_web/lib/block_scout_web/api_router.ex

@@ -18,42 +18,56 @@ defmodule BlockScoutWeb.ApiRouter do
     plug(:accepts, ["json"])
   end
 
-  scope "/v1", as: :api_v1 do
+  scope "/v1", BlockScoutWeb.API.V1, as: :api_v1 do
     pipe_through(:api)
+    get("/health", HealthController, :health)
 
+    if Application.get_env(:block_scout_web, __MODULE__)[:writing_enabled] do
+      post("/decompiled_smart_contract", DecompiledSmartContractController, :create)
+      post("/verified_smart_contracts", VerifiedSmartContractController, :create)
+    end
+  end
+
+  if Application.get_env(:block_scout_web, __MODULE__)[:reading_enabled] do
     scope "/" do
       alias BlockScoutWeb.API.{RPC, V1}
-      get("/supply", V1.SupplyController, :supply)
+      pipe_through(:api)
 
-      post("/eth_rpc", RPC.EthController, :eth_request)
+      scope "/v1", as: :api_v1 do
+        get("/supply", V1.SupplyController, :supply)
+        post("/eth_rpc", RPC.EthController, :eth_request)
+      end
 
-      forward("/", RPC.RPCTranslator, %{
-        "block" => RPC.BlockController,
-        "account" => RPC.AddressController,
-        "logs" => RPC.LogsController,
-        "token" => RPC.TokenController,
-        "stats" => RPC.StatsController,
-        "contract" => RPC.ContractController,
-        "transaction" => RPC.TransactionController
-      })
+      # For backward compatibility. Should be removed
+      post("/eth_rpc", RPC.EthController, :eth_request)
     end
   end
 
-  # For backward compatibility. Should be removed
   scope "/" do
-    alias BlockScoutWeb.API.RPC
     pipe_through(:api)
+    alias BlockScoutWeb.API.RPC
 
-    post("/eth_rpc", RPC.EthController, :eth_request)
+    scope "/v1", as: :api_v1 do
+      forward("/", RPC.RPCTranslator, %{
+        "block" => {RPC.BlockController, []},
+        "account" => {RPC.AddressController, []},
+        "logs" => {RPC.LogsController, []},
+        "token" => {RPC.TokenController, []},
+        "stats" => {RPC.StatsController, []},
+        "contract" => {RPC.ContractController, [:verify]},
+        "transaction" => {RPC.TransactionController, []}
+      })
+    end
 
+    # For backward compatibility. Should be removed
     forward("/", RPCTranslatorForwarder, %{
-      "block" => RPC.BlockController,
-      "account" => RPC.AddressController,
-      "logs" => RPC.LogsController,
-      "token" => RPC.TokenController,
-      "stats" => RPC.StatsController,
-      "contract" => RPC.ContractController,
-      "transaction" => RPC.TransactionController
+      "block" => {RPC.BlockController, []},
+      "account" => {RPC.AddressController, []},
+      "logs" => {RPC.LogsController, []},
+      "token" => {RPC.TokenController, []},
+      "stats" => {RPC.StatsController, []},
+      "contract" => {RPC.ContractController, [:verify]},
+      "transaction" => {RPC.TransactionController, []}
     })
   end
 end

apps/block_scout_web/lib/block_scout_web/controllers/api/rpc/rpc_translator.ex

@@ -25,8 +25,9 @@ defmodule BlockScoutWeb.API.RPC.RPCTranslator do
   def init(opts), do: opts
 
   def call(%Conn{params: %{"module" => module, "action" => action}} = conn, translations) do
-    with {:ok, controller} <- translate_module(translations, module),
+    with {:ok, {controller, write_actions}} <- translate_module(translations, module),
          {:ok, action} <- translate_action(action),
+         true <- action_accessed?(action, write_actions),
          {:ok, conn} <- call_controller(conn, controller, action) do
       conn
     else
@@ -64,7 +65,7 @@ defmodule BlockScoutWeb.API.RPC.RPCTranslator do
   end
 
   @doc false
-  @spec translate_module(map(), String.t()) :: {:ok, module()} | {:error, :no_action}
+  @spec translate_module(map(), String.t()) :: {:ok, {module(), list(atom())}} | {:error, :no_action}
   defp translate_module(translations, module) do
     module_lowercase = String.downcase(module)
 
@@ -83,6 +84,16 @@ defmodule BlockScoutWeb.API.RPC.RPCTranslator do
     ArgumentError -> {:error, :no_action}
   end
 
+  defp action_accessed?(action, write_actions) do
+    conf = Application.get_env(:block_scout_web, BlockScoutWeb.ApiRouter)
+
+    if action in write_actions do
+      conf[:writing_enabled] || {:error, :no_action}
+    else
+      conf[:reading_enabled] || {:error, :no_action}
+    end
+  end
+
   @doc false
   @spec call_controller(Conn.t(), module(), atom()) :: {:ok, Conn.t()} | {:error, :no_action} | {:error, Exception.t()}
   defp call_controller(conn, controller, action) do

apps/block_scout_web/lib/block_scout_web/router.ex

@@ -19,19 +19,9 @@ defmodule BlockScoutWeb.Router do
     plug(:accepts, ["json"])
   end
 
-  scope "/api/v1", BlockScoutWeb.API.V1, as: :api_v1 do
-    pipe_through(:api)
-    get("/health", HealthController, :health)
-
-    if Application.get_env(:block_scout_web, ApiRouter)[:writing_enabled] do
-      post("/decompiled_smart_contract", DecompiledSmartContractController, :create)
-      post("/verified_smart_contracts", VerifiedSmartContractController, :create)
-    end
-  end
+  forward("/api", ApiRouter)
 
   if Application.get_env(:block_scout_web, ApiRouter)[:reading_enabled] do
-    forward("/api", ApiRouter)
-
     # Needs to be 200 to support the schema introspection for graphiql
     @max_complexity 200