fix credo

apps/explorer/lib/explorer/chain.ex

@@ -2933,9 +2933,21 @@ defmodule Explorer.Chain do
         } = transaction
       ) do
     zero_wei = %Wei{value: Decimal.new(0)}
+    result = find_token_transfer_type(transaction, input, value)
+
+    if is_nil(result) && Enum.count(transaction.token_transfers) > 0 && value == zero_wei,
+      do: :token_transfer,
+      else: result
+  rescue
+    _ -> nil
+  end
+
+  def transaction_token_transfer_type(_), do: nil
+
+  defp find_token_transfer_type(transaction, input, value) do
+    zero_wei = %Wei{value: Decimal.new(0)}
 
     # https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/token/ERC721/ERC721.sol#L35
-    result =
     case {to_string(input), value} do
       # transferFrom(address,address,uint256)
       {"0x23b872dd" <> params, ^zero_wei} ->
@@ -2971,20 +2983,11 @@ defmodule Explorer.Chain do
 
         find_erc721_or_erc20_token_transfer(transaction.token_transfers, {address, decimal_value})
 
-        {_params, ^zero_wei} ->
-          if Enum.count(transaction.token_transfers) > 0, do: :token_transfer
-
       _ ->
         nil
     end
-
-    if is_nil(result) && Enum.count(transaction.token_transfers) > 0, do: :token_transfer, else: result
-  rescue
-    _ -> nil
   end
 
-  def transaction_token_transfer_type(_), do: nil
-
   defp find_erc721_token_transfer(token_transfers, {from_address, to_address}) do
     token_transfer =
       Enum.find(token_transfers, fn token_transfer ->