Handle smart contracts read errors

apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_function_response.html.eex

@@ -32,7 +32,7 @@
     <% {:error, %{code: code, message: message}} -> %>
         <pre><div style="padding-left: 20px">(error) : <%= "(#{code}) #{message}" %></div></pre>
     <% {:error, error} -> %>
-        <pre><div style="padding-left: 20px">(error) : <%= error %></div></pre>
+        <pre><div style="padding-left: 20px">(error) : <%= cut_rpc_url(error) %></div></pre>
     <% _ -> %>
 <pre>
 [<%= for {item, index} <- Enum.with_index(@outputs) do %>

apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex

@@ -152,7 +152,7 @@
           </div>
         <% error?(function["outputs"]) -> %>
           <% {:error, text_error} = function["outputs"] %>
-          <div class="alert alert-danger py-2 word-break-all" style="margin-bottom: 0;"><%= text_error %></div>
+          <div class="alert alert-danger py-2 word-break-all" style="margin-bottom: 0;"><%= cut_rpc_url(text_error) %></div>
         <% true -> %>
           <% nil %>
       <% end %>

apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex

@@ -285,4 +285,15 @@ defmodule BlockScoutWeb.SmartContractView do
   end
 
   def not_last_element?(length, index), do: length > 1 and index < length - 1
+
+  def cut_rpc_url(error) do
+    transport_options = Application.get_env(:explorer, :json_rpc_named_arguments)[:transport_options]
+
+    error
+    |> String.replace(transport_options[:url], "rpc_url")
+    |> (&if(transport_options[:fallback_url],
+          do: String.replace(&1, transport_options[:fallback_url], "rpc_url"),
+          else: &1
+        )).()
+  end
 end

apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/contract.ex

@@ -56,6 +56,7 @@ defmodule EthereumJSONRPC.Contract do
       |> case do
         {:ok, responses} -> responses
         {:error, {:bad_gateway, _request_url}} -> raise "Bad gateway"
+        {:error, {reason, _request_url}} -> raise to_string(reason)
         {:error, reason} when is_atom(reason) -> raise Atom.to_string(reason)
         {:error, error} -> raise error
       end

apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/decode_error.ex

@@ -61,7 +61,7 @@ defmodule EthereumJSONRPC.DecodeError do
 
       request:
 
-        url: #{if hide_url, do: "hidden", else: request_url}
+        url: #{if hide_url, do: "rpc_url", else: request_url}
 
         body: #{truncated_request_body}