Merge pull request #3171 from poanetwork/vb-import-accounts-from-genesis-geth

Import accounts from Geth genesis

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+- [#3171](https://github.com/poanetwork/blockscout/pull/3171) - Import accounts/contracts/balances from Geth genesis.json
 - [#3157](https://github.com/poanetwork/blockscout/pull/3157) - Read methods of implementation on proxy contract
 
 ### Fixes

apps/explorer/lib/explorer/chain_spec/genesis_data.ex

@@ -7,6 +7,7 @@ defmodule Explorer.ChainSpec.GenesisData do
 
   require Logger
 
+  alias Explorer.ChainSpec.Geth.Importer, as: GethImporter
   alias Explorer.ChainSpec.Parity.Importer
   alias HTTPoison.Response
 
@@ -58,11 +59,24 @@ defmodule Explorer.ChainSpec.GenesisData do
     path = Application.get_env(:explorer, __MODULE__)[:chain_spec_path]
 
     if path do
+      json_rpc_named_arguments = Application.fetch_env!(:indexer, :json_rpc_named_arguments)
+      variant = Keyword.fetch!(json_rpc_named_arguments, :variant)
+
       Task.Supervisor.async_nolink(Explorer.GenesisDataTaskSupervisor, fn ->
         case fetch_spec(path) do
           {:ok, chain_spec} ->
-            Importer.import_emission_rewards(chain_spec)
+            case variant do
-            {:ok, _} = Importer.import_genesis_accounts(chain_spec)
+              EthereumJSONRPC.Parity ->
+                Importer.import_emission_rewards(chain_spec)
+                {:ok, _} = Importer.import_genesis_accounts(chain_spec)
+
+              EthereumJSONRPC.Geth ->
+                {:ok, _} = GethImporter.import_genesis_accounts(chain_spec)
+
+              _ ->
+                Importer.import_emission_rewards(chain_spec)
+                {:ok, _} = Importer.import_genesis_accounts(chain_spec)
+            end
 
           {:error, reason} ->
             Logger.warn(fn -> "Failed to fetch genesis data. #{inspect(reason)}" end)

apps/explorer/lib/explorer/chain_spec/geth/importer.ex

@@ -0,0 +1,93 @@
+# credo:disable-for-this-file
+defmodule Explorer.ChainSpec.Geth.Importer do
+  @moduledoc """
+  Imports data from Geth genesis.json.
+  """
+
+  require Logger
+
+  alias EthereumJSONRPC.Blocks
+  alias Explorer.Chain
+  alias Explorer.Chain.Hash.Address, as: AddressHash
+
+  def import_genesis_accounts(chain_spec) do
+    balance_params =
+      chain_spec
+      |> genesis_accounts()
+      |> Stream.map(fn balance_map ->
+        Map.put(balance_map, :block_number, 0)
+      end)
+      |> Enum.to_list()
+
+    json_rpc_named_arguments = Application.get_env(:explorer, :json_rpc_named_arguments)
+
+    {:ok, %Blocks{blocks_params: [%{timestamp: timestamp}]}} =
+      EthereumJSONRPC.fetch_blocks_by_range(1..1, json_rpc_named_arguments)
+
+    day = DateTime.to_date(timestamp)
+
+    balance_daily_params =
+      chain_spec
+      |> genesis_accounts()
+      |> Stream.map(fn balance_map ->
+        Map.put(balance_map, :day, day)
+      end)
+      |> Enum.to_list()
+
+    address_params =
+      balance_params
+      |> Stream.map(fn %{address_hash: hash} = map ->
+        Map.put(map, :hash, hash)
+      end)
+      |> Enum.to_list()
+
+    params = %{
+      address_coin_balances: %{params: balance_params},
+      address_coin_balances_daily: %{params: balance_daily_params},
+      addresses: %{params: address_params}
+    }
+
+    Chain.import(params)
+  end
+
+  def genesis_accounts(chain_spec) do
+    accounts = chain_spec["alloc"]
+
+    if accounts do
+      parse_accounts(accounts)
+    else
+      Logger.warn(fn -> "No accounts are defined in genesis" end)
+
+      []
+    end
+  end
+
+  defp parse_accounts(accounts) do
+    accounts
+    |> Stream.filter(fn {_address, map} ->
+      !is_nil(map["balance"])
+    end)
+    |> Stream.map(fn {address, %{"balance" => value} = params} ->
+      formatted_address = if String.starts_with?(address, "0x"), do: address, else: "0x" <> address
+      {:ok, address_hash} = AddressHash.cast(formatted_address)
+      balance = parse_number(value)
+
+      code = params["code"]
+
+      %{address_hash: address_hash, value: balance, contract_code: code}
+    end)
+    |> Enum.to_list()
+  end
+
+  defp parse_number("0x" <> hex_number) do
+    {number, ""} = Integer.parse(hex_number, 16)
+
+    number
+  end
+
+  defp parse_number(string_number) do
+    {number, ""} = Integer.parse(string_number, 10)
+
+    number
+  end
+end

apps/explorer/lib/explorer/chain_spec/parity/importer.ex

@@ -1,6 +1,7 @@
+# credo:disable-for-this-file
 defmodule Explorer.ChainSpec.Parity.Importer do
   @moduledoc """
-  Imports data from parity chain spec.
+  Imports data from Parity/Open Ethereum chain spec.
   """
 
   require Logger