Merge pull request #3422 from poanetwork/vb-contract-tuple-reader

Fix contract reader: tuple type

.dialyzer-ignore

@@ -18,7 +18,7 @@ lib/block_scout_web/views/layout_view.ex:145: The call 'Elixir.Poison.Parser':'p
 lib/block_scout_web/views/layout_view.ex:237: The call 'Elixir.Poison.Parser':'parse!'
 lib/block_scout_web/controllers/api/rpc/transaction_controller.ex:21
 lib/block_scout_web/controllers/api/rpc/transaction_controller.ex:22
-lib/explorer/smart_contract/reader.ex:330
+lib/explorer/smart_contract/reader.ex:347
 lib/indexer/fetcher/token_total_supply_on_demand.ex:16
 lib/explorer/exchange_rates/source.ex:104
 lib/explorer/exchange_rates/source.ex:107

CHANGELOG.md

@@ -15,6 +15,7 @@
 
 
 ### Fixes
+- [#3422](https://github.com/poanetwork/blockscout/pull/3422) - Fix contract reader: tuple type
 - [#3408](https://github.com/poanetwork/blockscout/pull/3408) - Fix (total) difficulty display
 - [#3401](https://github.com/poanetwork/blockscout/pull/3401) - Fix procedure of marking internal transactions as failed
 - [#3400](https://github.com/poanetwork/blockscout/pull/3400) - Add :last_block_number realtime chain event

apps/explorer/lib/explorer/smart_contract/reader.ex

@@ -272,6 +272,9 @@ defmodule Explorer.SmartContract.Reader do
       {:array, type} ->
         format_input_type(type) <> "[]"
 
+      {:tuple, tuple} ->
+        format_tuple_type(tuple)
+
       {type, size} ->
         Atom.to_string(type) <> Integer.to_string(size)
 
@@ -280,6 +283,20 @@ defmodule Explorer.SmartContract.Reader do
     end
   end
 
+  defp format_tuple_type(tuple) do
+    tuple_types =
+      tuple
+      |> Enum.reduce(nil, fn tuple_item, acc ->
+        if acc do
+          acc <> "," <> format_input_type(tuple_item)
+        else
+          format_input_type(tuple_item)
+        end
+      end)
+
+    "tuple[#{tuple_types}]"
+  end
+
   def fetch_current_value_from_blockchain(function, abi, contract_address_hash) do
     values =
       case function do