From 13a23cfd09481372d10d497c5e177547f55d4981 Mon Sep 17 00:00:00 2001
From: Victor Baranov <baranov.viktor.27@gmail.com>
Date: Tue, 5 Jan 2021 00:08:33 +0300
Subject: [PATCH] Fix output of tuple type

---
 CHANGELOG.md                                  |  1 +
 .../views/smart_contract_view.ex              | 20 +++++++++++++------
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index a0f3ae537b..4ff76585d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 - [#3540](https://github.com/poanetwork/blockscout/pull/3540) - Apply DarkForest custom theme to NFT instances
 
 ### Fixes
+- [#3551](https://github.com/poanetwork/blockscout/pull/3551) - Fix contract's method's output of tuple type
 
 ### Chore
 - [#3540](https://github.com/poanetwork/blockscout/pull/3540), [#3545](https://github.com/poanetwork/blockscout/pull/3545) - Support different versions of DarkForest (0.4 - 0.5)
diff --git a/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex b/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
index 69a03441b8..a993801240 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/smart_contract_view.ex
@@ -48,12 +48,16 @@ defmodule BlockScoutWeb.SmartContractView do
   end
 
   def values(values, type) when is_list(values) and type == "tuple[]" do
-    array_from_tuple = tupple_to_array(values)
+    array_from_tuple = tuple_array_to_array(values)
 
     array_from_tuple
     |> Enum.join(", ")
   end
 
+  def values(value, _type) when is_tuple(value) do
+    tuple_to_array(value)
+  end
+
   def values(value, type) when type in ["address", "address payable"] do
     {:ok, address} = Explorer.Chain.Hash.Address.cast(value)
     to_string(address)
@@ -62,16 +66,20 @@ defmodule BlockScoutWeb.SmartContractView do
   def values(values, _) when is_list(values), do: Enum.join(values, ",")
   def values(value, _), do: value
 
-  defp tupple_to_array(values) do
+  defp tuple_array_to_array(values) do
     values
     |> Enum.map(fn value ->
-      value
-      |> Tuple.to_list()
-      |> Enum.map(&binary_to_utf_string(&1))
-      |> Enum.join(",")
+      tuple_to_array(value)
     end)
   end
 
+  defp tuple_to_array(value) do
+    value
+    |> Tuple.to_list()
+    |> Enum.map(&binary_to_utf_string(&1))
+    |> Enum.join(",")
+  end
+
   defp binary_to_utf_string(item) do
     if is_binary(item), do: "0x" <> Base.encode16(item, case: :lower), else: item
   end