Get transaction created_contract_address_hash from first internal

Fixes #593
Fixes #621
Fixes #920

`created_contract_address_hash` should be treated like `error` and
`status`, where only the first internal transaction matters.

apps/explorer/lib/explorer/chain/import/internal_transactions.ex

@@ -100,9 +100,8 @@ defmodule Explorer.Chain.Import.InternalTransactions do
             internal_transactions_indexed_at: ^timestamps.updated_at,
             created_contract_address_hash:
               fragment(
-                "(SELECT it.created_contract_address_hash FROM internal_transactions AS it WHERE it.transaction_hash = ? and it.type = 'create' and ? IS NULL)",
-                t.hash,
-                t.to_address_hash
+                "(SELECT it.created_contract_address_hash FROM internal_transactions AS it WHERE it.transaction_hash = ? ORDER BY it.index ASC LIMIT 1)",
+                t.hash
               ),
             error:
               fragment(

apps/explorer/test/explorer/chain/import_test.exs

@@ -686,101 +686,6 @@ defmodule Explorer.Chain.ImportTest do
                Chain.string_to_address_hash(created_contract_address_hash)
     end
 
-    test "when the transaction has a to_address and an internal transaction with type create it does not populates the denormalized created_contract_address_hash" do
-      smart_contract_bytecode =
-        "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"
-
-      block_hash = "0xe52d77084cab13a4e724162bcd8c6028e5ecfaa04d091ee476e96b9958ed6b47"
-      block_number = 34
-      miner_hash = from_address_hash = "0xe8ddc5c7a2d2f0d7a9798459c0104fdf5e987aca"
-      to_address_hash = "0xf7ddc5c7a2d2f0d7a9798459c0104fdf5e9a7bbb"
-      created_contract_address_hash = "0x8bf38d4764929064f2d4d3a56520a76ab3df415b"
-      transaction_hash = "0x3a3eb134e6792ce9403ea4188e5e79693de9e4c94e499db132be086400da79e6"
-
-      options = %{
-        addresses: %{
-          params: [
-            %{hash: from_address_hash},
-            %{
-              contract_code: smart_contract_bytecode,
-              hash: created_contract_address_hash
-            },
-            %{hash: to_address_hash}
-          ]
-        },
-        blocks: %{
-          params: [
-            %{
-              consensus: true,
-              difficulty: 340_282_366_920_938_463_463_374_607_431_768_211_454,
-              gas_limit: 6_926_030,
-              gas_used: 269_607,
-              hash: block_hash,
-              miner_hash: miner_hash,
-              nonce: 0,
-              number: block_number,
-              parent_hash: "0x106d528393159b93218dd410e2a778f083538098e46f1a44902aa67a164aed0b",
-              size: 1493,
-              timestamp: Timex.parse!("2017-12-15T21:06:15Z", "{ISO:Extended:Z}"),
-              total_difficulty: 11_569_600_475_311_907_757_754_736_652_679_816_646_147
-            }
-          ]
-        },
-        transactions: %{
-          params: [
-            %{
-              block_hash: block_hash,
-              block_number: block_number,
-              cumulative_gas_used: 269_607,
-              from_address_hash: from_address_hash,
-              gas: 269_607,
-              gas_price: 1,
-              gas_used: 269_607,
-              hash: transaction_hash,
-              index: 0,
-              input: "0x",
-              nonce: 0,
-              r: 0,
-              s: 0,
-              status: :ok,
-              to_address_hash: to_address_hash,
-              v: 0,
-              value: 0
-            }
-          ],
-          on_conflict: :replace_all
-        },
-        internal_transactions: %{
-          params: [
-            %{
-              block_number: 35,
-              call_type: "call",
-              created_contract_code: smart_contract_bytecode,
-              created_contract_address_hash: created_contract_address_hash,
-              from_address_hash: from_address_hash,
-              gas: 4_677_320,
-              gas_used: 27770,
-              index: 0,
-              init:
-                "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",
-              output: "0x",
-              to_address_hash: to_address_hash,
-              trace_address: [],
-              transaction_hash: transaction_hash,
-              type: "create",
-              value: 0
-            }
-          ]
-        }
-      }
-
-      assert {:ok, _} = Import.all(options)
-
-      transaction = Explorer.Repo.get(Transaction, transaction_hash)
-
-      assert transaction.created_contract_address_hash == nil
-    end
-
     test "import balances" do
       assert {:ok, _} =
                Import.all(%{
@@ -794,10 +699,8 @@ defmodule Explorer.Chain.ImportTest do
                })
     end
 
-    test "transactions with multiple create internal transactions return error" do
-      assert {:error, :internal_transactions_indexed_at_transactions,
-              %{exception: %Postgrex.Error{postgres: %{code: :cardinality_violation}}, transaction_hashes: [_]},
-              _} =
+    test "transactions with multiple create uses first internal transaction's created contract address hash" do
+      assert {:ok, _} =
                Import.all(%{
                  blocks: %{
                    params: [
@@ -890,6 +793,11 @@ defmodule Explorer.Chain.ImportTest do
                    timeout: 5
                  }
                })
+
+      assert %Transaction{created_contract_address_hash: created_contract_address_hash} =
+               Repo.get(Transaction, "0x53bd884872de3e488692881baeec262e7b95234d3965248c39fe992fffd433e5")
+
+      assert to_string(created_contract_address_hash) == "0xffc87239eb0267bc3ca2cd51d12fbf278e02ccb4"
     end
 
     test "updates transaction error and status from internal transactions when status is not set from (pre-Byzantium/Ethereum Classic) receipts" do