Add regression test for #1584

When a block contains rewards for two uncle blocks to the same address,
the Cardinality Violation error occurs due to rewards not being reduced.

apps/indexer/test/indexer/block/fetcher_test.exs

@@ -609,6 +609,102 @@ defmodule Indexer.Block.FetcherTest do
           raise ArgumentError, "Unsupported variant (#{variant})"
       end
     end
+
+    @tag :no_geth
+    test "correctly imports blocks with multiple uncle rewards for the same address", %{
+      block_fetcher: %Fetcher{json_rpc_named_arguments: json_rpc_named_arguments} = block_fetcher
+    } do
+      block_number = 7_374_455
+
+      if json_rpc_named_arguments[:transport] == EthereumJSONRPC.Mox do
+        EthereumJSONRPC.Mox
+        |> expect(:json_rpc, 2, fn requests, _options ->
+          {:ok,
+           Enum.map(requests, fn
+             %{id: id, method: "eth_getBlockByNumber", params: ["0x708677", true]} ->
+               %{
+                 id: id,
+                 result: %{
+                   "author" => "0x5a0b54d5dc17e0aadc383d2db43b0a0d3e029c4c",
+                   "difficulty" => "0x6bc767dd80781",
+                   "extraData" => "0x5050594520737061726b706f6f6c2d6574682d7477",
+                   "gasLimit" => "0x7a121d",
+                   "gasUsed" => "0x79cbe9",
+                   "hash" => "0x1b6fb99af0b51af6685a191b2f7bcba684f8565629bf084c70b2530479407455",
+                   "logsBloom" =>
+                     "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",
+                   "miner" => "0x5a0b54d5dc17e0aadc383d2db43b0a0d3e029c4c",
+                   "mixHash" => "0xda53ae7c2b3c529783d6cdacdb90587fd70eb651c0f04253e8ff17de97844010",
+                   "nonce" => "0x0946e5f01fce12bc",
+                   "number" => "0x708677",
+                   "parentHash" => "0x62543e836e0ef7edfa9e38f26526092c4be97efdf5ba9e0f53a4b0b7d5bc930a",
+                   "receiptsRoot" => "0xa7d2b82bd8526de11736c18bd5cc8cfe2692106c4364526f3310ad56d78669c4",
+                   "sealFields" => [
+                     "0xa0da53ae7c2b3c529783d6cdacdb90587fd70eb651c0f04253e8ff17de97844010",
+                     "0x880946e5f01fce12bc"
+                   ],
+                   "sha3Uncles" => "0x483a8a21a5825ad270f358b3ea56e060bbb8b3082d9a92ec8fa17a5c7e6fc1b6",
+                   "size" => "0x544c",
+                   "stateRoot" => "0x85daa9cd528004c1609d4cb3520fd958e85983bb4183124a4a9f7137fd39c691",
+                   "timestamp" => "0x5c8bc76e",
+                   "totalDifficulty" => "0x201a42c35142ae94458",
+                   "transactions" => [],
+                   "transactionsRoot" => "0xcd6c12fa43cd4e92ad5c0bf232b30488bbcbfe273c5b4af0366fced0767d54db",
+                   "uncles" => []
+                 }
+               }
+
+             %{id: id, method: "trace_block"} ->
+               %{
+                 id: id,
+                 result: [
+                   %{
+                     "action" => %{
+                       "author" => "0x5a0b54d5dc17e0aadc383d2db43b0a0d3e029c4c",
+                       "rewardType" => "block",
+                       "value" => "0x1d7d843dc3b48000"
+                     },
+                     "blockHash" => "0x1b6fb99af0b51af6685a191b2f7bcba684f8565629bf084c70b2530479407455",
+                     "blockNumber" => block_number,
+                     "subtraces" => 0,
+                     "traceAddress" => [],
+                     "type" => "reward"
+                   },
+                   %{
+                     "action" => %{
+                       "author" => "0xea674fdde714fd979de3edf0f56aa9716b898ec8",
+                       "rewardType" => "uncle",
+                       "value" => "0x14d1120d7b160000"
+                     },
+                     "blockHash" => "0x1b6fb99af0b51af6685a191b2f7bcba684f8565629bf084c70b2530479407455",
+                     "blockNumber" => block_number,
+                     "subtraces" => 0,
+                     "traceAddress" => [],
+                     "type" => "reward"
+                   },
+                   %{
+                     "action" => %{
+                       "author" => "0xea674fdde714fd979de3edf0f56aa9716b898ec8",
+                       "rewardType" => "uncle",
+                       "value" => "0x18493fba64ef0000"
+                     },
+                     "blockHash" => "0x1b6fb99af0b51af6685a191b2f7bcba684f8565629bf084c70b2530479407455",
+                     "blockNumber" => block_number,
+                     "subtraces" => 0,
+                     "traceAddress" => [],
+                     "type" => "reward"
+                   }
+                 ]
+               }
+           end)}
+        end)
+      end
+
+      assert {:ok, %{errors: [], inserted: %{block_rewards: block_rewards}}} =
+               Fetcher.fetch_and_import_range(block_fetcher, block_number..block_number)
+
+      assert Repo.one!(select(Chain.Block.Reward, fragment("COUNT(*)"))) == 2
+    end
   end
 
   defp wait_until(timeout, producer) do