From d290936e117d14f07df854cc880290a4735498e5 Mon Sep 17 00:00:00 2001
From: Ayrat Badykov <ayratin555@gmail.com>
Date: Mon, 5 Aug 2019 12:25:29 +0300
Subject: [PATCH] rewrite emission rewards records

---
 .../explorer/chain_spec/parity/importer.ex    |  3 +-
 .../chain_spec/parity/importer_test.exs       | 45 +++++++++++++++++++
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/apps/explorer/lib/explorer/chain_spec/parity/importer.ex b/apps/explorer/lib/explorer/chain_spec/parity/importer.ex
index df4a6a0f68..92b63f4c42 100644
--- a/apps/explorer/lib/explorer/chain_spec/parity/importer.ex
+++ b/apps/explorer/lib/explorer/chain_spec/parity/importer.ex
@@ -12,7 +12,8 @@ defmodule Explorer.ChainSpec.Parity.Importer do
   def import_emission_rewards(chain_spec) do
     rewards = emission_rewards(chain_spec)
 
-    Repo.insert_all(EmissionReward, rewards)
+    {_, nil} = Repo.delete_all(EmissionReward)
+    {_, nil} = Repo.insert_all(EmissionReward, rewards)
   end
 
   def emission_rewards(chain_spec) do
diff --git a/apps/explorer/test/explorer/chain_spec/parity/importer_test.exs b/apps/explorer/test/explorer/chain_spec/parity/importer_test.exs
index 60be2c688d..2fb98f64dc 100644
--- a/apps/explorer/test/explorer/chain_spec/parity/importer_test.exs
+++ b/apps/explorer/test/explorer/chain_spec/parity/importer_test.exs
@@ -1,9 +1,11 @@
 defmodule Explorer.ChainSpec.Parity.ImporterTest do
   use Explorer.DataCase
 
+  alias Explorer.Chain.Block.EmissionReward
   alias Explorer.Chain.Block.Range
   alias Explorer.Chain.Wei
   alias Explorer.ChainSpec.Parity.Importer
+  alias Explorer.Repo
 
   @chain_spec "#{File.cwd!()}/test/support/fixture/chain_spec/foundation.json"
               |> File.read!()
@@ -32,5 +34,48 @@ defmodule Explorer.ChainSpec.Parity.ImporterTest do
     test "inserts emission rewards from chain spec" do
       assert {3, nil} = Importer.import_emission_rewards(@chain_spec)
     end
+
+    test "rewrites all recored" do
+      old_block_rewards = %{
+        "0x0" => "0x1bc16d674ec80000",
+        "0x42ae50" => "0x29a2241af62c0000",
+        "0x6f1580" => "0x4563918244f40000"
+      }
+
+      chain_spec = %{
+        @chain_spec
+        | "engine" => %{
+            @chain_spec["engine"]
+            | "Ethash" => %{
+                @chain_spec["engine"]["Ethash"]
+                | "params" => %{@chain_spec["engine"]["Ethash"]["params"] | "blockReward" => old_block_rewards}
+              }
+          }
+      }
+
+      assert {3, nil} = Importer.import_emission_rewards(chain_spec)
+      [first, second, third] = Repo.all(EmissionReward)
+
+      assert first.reward == %Wei{value: Decimal.new(2_000_000_000_000_000_000)}
+      assert first.block_range == %Range{from: 0, to: 4_370_000}
+
+      assert second.reward == %Wei{value: Decimal.new(3_000_000_000_000_000_000)}
+      assert second.block_range == %Range{from: 4_370_001, to: 7_280_000}
+
+      assert third.reward == %Wei{value: Decimal.new(5_000_000_000_000_000_000)}
+      assert third.block_range == %Range{from: 7_280_001, to: :infinity}
+
+      assert {3, nil} = Importer.import_emission_rewards(@chain_spec)
+      [new_first, new_second, new_third] = Repo.all(EmissionReward)
+
+      assert new_first.reward == %Wei{value: Decimal.new(5_000_000_000_000_000_000)}
+      assert new_first.block_range == %Range{from: 0, to: 4_370_000}
+
+      assert new_second.reward == %Wei{value: Decimal.new(3_000_000_000_000_000_000)}
+      assert new_second.block_range == %Range{from: 4_370_001, to: 7_280_000}
+
+      assert new_third.reward == %Wei{value: Decimal.new(2_000_000_000_000_000_000)}
+      assert new_third.block_range == %Range{from: 7_280_001, to: :infinity}
+    end
   end
 end