add case insentive search

apps/block_scout_web/test/block_scout_web/chain_test.exs

@@ -51,6 +51,13 @@ defmodule BlockScoutWeb.ChainTest do
       assert {:ok, %Address{}} = name |> Chain.from_param()
     end
 
+    test "finds a token by its name even if lowercase name was passed" do
+      name = "ayr"
+      insert(:token, symbol: String.upcase(name))
+
+      assert {:ok, %Address{}} = name |> Chain.from_param()
+    end
+
     test "returns {:error, :not_found} when garbage is passed in" do
       assert {:error, :not_found} = Chain.from_param("any ol' thing")
     end

apps/explorer/lib/explorer/chain.ex

@@ -640,7 +640,7 @@ defmodule Explorer.Chain do
   def token_contract_address_from_token_name(name) when is_binary(name) do
     query =
       from(token in Token,
-        where: token.symbol == ^name,
+        where: ilike(token.symbol, ^name),
         select: token.contract_address_hash
       )