Add a TransactionReceiptImporter test for always-pending transactions

lib/explorer/importers/transaction_receipt_importer.ex

@@ -18,11 +18,11 @@ defmodule Explorer.TransactionReceiptImporter do
   @dialyzer {:nowarn_function, download_receipt: 1}
   defp download_receipt(hash) do
     {:ok, receipt} = eth_get_transaction_receipt(hash)
-    receipt
+    receipt || %{}
   end
 
   defp ingest_receipt(receipt) do
-    hash = String.downcase(receipt["transactionHash"])
+    hash = String.downcase("#{receipt["transactionHash"]}")
     query = from transaction in Transaction,
       left_join: receipt in assoc(transaction, :receipt),
       where: fragment("lower(?)", transaction.hash) == ^hash,
@@ -51,8 +51,8 @@ defmodule Explorer.TransactionReceiptImporter do
     }
   end
 
-  defp decode_integer_field(hex) do
-    {"0x", base_16} = String.split_at(hex, 2)
-    String.to_integer(base_16, 16)
+  defp decode_integer_field("0x" <> hex) when is_binary(hex) do
+    String.to_integer(hex, 16)
   end
+  defp decode_integer_field(field), do: field
 end

test/explorer/importers/transaction_receipt_importer_test.exs

@@ -29,5 +29,13 @@ defmodule Explorer.TransactionReceiptImporterTest do
         assert Repo.all(TransactionReceipt) |> Enum.count() == 0
       end
     end
+
+    test "does not process a forever-pending receipt" do
+      insert(:transaction, hash: "0xde791cfcde3900d4771e5fcf8c11dc305714118df7aa7e42f84576e64dbf6246")
+      use_cassette "transaction_importer_import_1_pending" do
+        TransactionReceiptImporter.import("0xde791cfcde3900d4771e5fcf8c11dc305714118df7aa7e42f84576e64dbf6246")
+        assert Repo.all(TransactionReceipt) |> Enum.count() == 0
+      end
+    end
   end
 end

test/support/fixture/vcr_cassettes/transaction_importer_import_1_pending.json

@@ -0,0 +1,30 @@
+[
+  {
+    "request": {
+      "body": "{\"params\":[\"0xde791cfcde3900d4771e5fcf8c11dc305714118df7aa7e42f84576e64dbf6246\"],\"method\":\"eth_getTransactionReceipt\",\"jsonrpc\":\"2.0\",\"id\":0}",
+      "headers": {
+        "Content-Type": "application/json"
+      },
+      "method": "post",
+      "options": [],
+      "request_body": "",
+      "url": "https://sokol.poa.network"
+    },
+    "response": {
+      "binary": false,
+      "body": "{\"jsonrpc\":\"2.0\",\"result\":null,\"id\":0}\n",
+      "headers": {
+        "Date": "Wed, 14 Feb 2018 22:44:27 GMT",
+        "Content-Type": "application/json",
+        "Transfer-Encoding": "chunked",
+        "Connection": "keep-alive",
+        "Set-Cookie": "__cfduid=d7190cf3b5f318c3eeb548439c39114181518648267; expires=Thu, 14-Feb-19 22:44:27 GMT; path=/; domain=.poa.network; HttpOnly; Secure",
+        "Expect-CT": "max-age=604800, report-uri=\"https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct\"",
+        "Server": "cloudflare",
+        "CF-RAY": "3ed38d582f866cbe-SJC"
+      },
+      "status_code": 200,
+      "type": "ok"
+    }
+  }
+]