hotfix: handle nil prices per proofs (#687)

Author: uri-99

explorer/lib/explorer/periodically.ex

@@ -72,7 +72,6 @@ defmodule Explorer.Periodically do
         |> case do
           {:ok, _} ->
             PubSub.broadcast(Explorer.PubSub, "update_views", %{
-              merkle_root: batch.merkle_root,
               eth_usd:
                 case EthConverter.get_eth_price_usd() do
                   {:ok, eth_usd_price} -> eth_usd_price

explorer/lib/explorer_web/live/eth_converter.ex

@@ -6,6 +6,10 @@ defmodule EthConverter do
 
   def wei_to_eth(wei, decimal_places \\ 18)
 
+  def wei_to_eth(wei, _decimal_places) when is_nil(wei) do
+    :nil
+  end
+
   def wei_to_eth(wei, decimal_places) when is_integer(wei) do
     wei
     |> Decimal.new()

explorer/lib/explorer_web/live/pages/batch/index.ex

@@ -55,14 +55,14 @@ defmodule ExplorerWeb.Batch.Index do
   end
 
   @impl true
-  def handle_info(%{merkle_root: merkle_root, eth_usd: eth_usd_price} = _params, socket) do
+  def handle_info(%{eth_usd: eth_usd_price} = _params, socket) do
     eth_price =
       case socket.assigns.current_batch do
         :empty -> nil
         batch -> EthConverter.wei_to_eth(batch.cost_per_proof)
       end
 
-    new_batch = Batches.get_batch(%{merkle_root: merkle_root})
+    new_batch = Batches.get_batch(%{merkle_root: socket.assigns.merkle_root})
 
     case eth_usd_price do
       :empty ->

explorer/lib/explorer_web/live/pages/batch/index.html.heex

@@ -15,7 +15,7 @@
         Cost per Proof:
         <p>
           <%= @current_batch.cost_per_proof |> EthConverter.wei_to_eth() %> ETH
-          <%= if @eth_usd_price != :empty do %>
+          <%= if @eth_usd_price != :empty and @eth_usd_price != "0.00000" do %>
             (<%= @eth_usd_price %> USD)
           <% end %>
         </p>