diff --git a/apps/explorer/config/config.exs b/apps/explorer/config/config.exs
index 4f6e5649c9..c7b97b016e 100644
--- a/apps/explorer/config/config.exs
+++ b/apps/explorer/config/config.exs
@@ -106,7 +106,9 @@ config :explorer, Explorer.Counters.BlockPriorityFeeCounter,
 
 config :explorer, Explorer.TokenTransferTokenIdMigration.Supervisor, enabled: true
 
-config :explorer, Explorer.Chain.Checker.CheckBytecodeMatchingOnDemand, enabled: true
+config :explorer, Explorer.Chain.Fetcher.CheckBytecodeMatchingOnDemand, enabled: true
+
+config :explorer, Explorer.Chain.Fetcher.FetchValidatorInfoOnDemand, enabled: true
 
 config :explorer, Explorer.Chain.Cache.GasUsage,
   enabled: System.get_env("CACHE_ENABLE_TOTAL_GAS_USAGE_COUNTER") == "true"
diff --git a/apps/explorer/lib/explorer/application.ex b/apps/explorer/lib/explorer/application.ex
index d7c3f7875d..7d9d66c576 100644
--- a/apps/explorer/lib/explorer/application.ex
+++ b/apps/explorer/lib/explorer/application.ex
@@ -109,7 +109,8 @@ defmodule Explorer.Application do
       configure(Explorer.Tags.AddressTag.Cataloger),
       configure(MinMissingBlockNumber),
       configure(TokenTransferTokenIdMigration.Supervisor),
-      configure(Explorer.Chain.Checker.CheckBytecodeMatchingOnDemand)
+      configure(Explorer.Chain.Fetcher.CheckBytecodeMatchingOnDemand),
+      configure(Explorer.Chain.Fetcher.FetchValidatorInfoOnDemand)
     ]
     |> List.flatten()
   end
diff --git a/apps/explorer/lib/explorer/application/constants.ex b/apps/explorer/lib/explorer/application/constants.ex
new file mode 100644
index 0000000000..52abd80894
--- /dev/null
+++ b/apps/explorer/lib/explorer/application/constants.ex
@@ -0,0 +1,46 @@
+defmodule Explorer.Application.Constants do
+  @moduledoc """
+    Tracks some kv info
+  """
+
+  use Explorer.Schema
+  alias Explorer.Repo
+
+  @keys_manager_contract_address_key "keys_manager_contract_address"
+
+  @primary_key false
+  schema "constants" do
+    field(:key, :string, primary_key: true)
+    field(:value, :string)
+
+    timestamps()
+  end
+
+  def changeset(attrs) do
+    %__MODULE__{}
+    |> changeset(attrs)
+  end
+
+  @required_attrs ~w(key value)a
+  def changeset(%__MODULE__{} = constant, attrs) do
+    constant
+    |> cast(attrs, @required_attrs)
+    |> validate_required(@required_attrs)
+  end
+
+  def get_constant_by_key(key) do
+    __MODULE__
+    |> where([constant], constant.key == ^key)
+    |> Repo.one()
+  end
+
+  def insert_keys_manager_contract_address(value) do
+    %{key: @keys_manager_contract_address_key, value: value}
+    |> changeset()
+    |> Repo.insert!()
+  end
+
+  def get_keys_manager_contract_address do
+    get_constant_by_key(@keys_manager_contract_address_key)
+  end
+end
diff --git a/apps/explorer/lib/explorer/chain.ex b/apps/explorer/lib/explorer/chain.ex
index fd833533e4..19d61e260a 100644
--- a/apps/explorer/lib/explorer/chain.ex
+++ b/apps/explorer/lib/explorer/chain.ex
@@ -80,7 +80,7 @@ defmodule Explorer.Chain do
 
   alias Explorer.Chain.Import.Runner
   alias Explorer.Chain.InternalTransaction.{CallType, Type}
-  alias Explorer.Chain.Checker.CheckBytecodeMatchingOnDemand
+  alias Explorer.Chain.Fetcher.CheckBytecodeMatchingOnDemand
 
   alias Explorer.Counters.{
     AddressesCounter,
diff --git a/apps/explorer/lib/explorer/chain/block/reward.ex b/apps/explorer/lib/explorer/chain/block/reward.ex
index f3c9bfa05e..84a9da9084 100644
--- a/apps/explorer/lib/explorer/chain/block/reward.ex
+++ b/apps/explorer/lib/explorer/chain/block/reward.ex
@@ -5,9 +5,11 @@ defmodule Explorer.Chain.Block.Reward do
 
   use Explorer.Schema
 
+  alias Explorer.Application.Constants
   alias Explorer.Chain
   alias Explorer.Chain.Block.Reward.AddressType
-  alias Explorer.Chain.{Address, Block, Hash, Wei}
+  alias Explorer.Chain.{Address, Block, Hash, Wei, Validator}
+  alias Explorer.Chain.Fetcher.FetchValidatorInfoOnDemand
   alias Explorer.{PagingOptions, Repo}
   alias Explorer.SmartContract.Reader
 
@@ -152,6 +154,39 @@ defmodule Explorer.Chain.Block.Reward do
     end
   end
 
+  def get_validator_payout_key_by_mining_from_db(mining_key) do
+    contract_address_from_db = Constants.get_keys_manager_contract_address()
+
+    contract_address_from_env =
+      Application.get_env(:explorer, Explorer.Chain.Block.Reward, %{})[:keys_manager_contract_address]
+
+    cond do
+      is_nil(contract_address_from_env) ->
+        %{is_validator: nil, payout_key: mining_key}
+
+      is_nil(contract_address_from_db) ->
+        FetchValidatorInfoOnDemand.trigger_fetch(mining_key)
+        %{is_validator: nil, payout_key: mining_key}
+
+      contract_address_from_db.value |> String.downcase() == contract_address_from_env |> String.downcase() ->
+        FetchValidatorInfoOnDemand.trigger_fetch(mining_key)
+        validator = Validator.get_validator_by_address_hash(mining_key)
+        is_validator = validator && validator.is_validator
+
+        with {:is_validator, true} <- {:is_validator, is_validator},
+             false <- is_nil(validator.payout_key_hash) do
+          %{is_validator: is_validator, payout_key: validator.payout_key_hash}
+        else
+          _ ->
+            %{is_validator: is_validator, payout_key: mining_key}
+        end
+
+      true ->
+        FetchValidatorInfoOnDemand.trigger_fetch(mining_key)
+        %{is_validator: nil, payout_key: mining_key}
+    end
+  end
+
   def get_validator_payout_key_by_mining(mining_key) do
     is_validator = is_validator(mining_key)
 
diff --git a/apps/explorer/lib/explorer/chain/checker/check_bytecode_matching_on_demand.ex b/apps/explorer/lib/explorer/chain/fetcher/check_bytecode_matching_on_demand.ex
similarity index 77%
rename from apps/explorer/lib/explorer/chain/checker/check_bytecode_matching_on_demand.ex
rename to apps/explorer/lib/explorer/chain/fetcher/check_bytecode_matching_on_demand.ex
index 15e5a9a8c9..ec28298b00 100644
--- a/apps/explorer/lib/explorer/chain/checker/check_bytecode_matching_on_demand.ex
+++ b/apps/explorer/lib/explorer/chain/fetcher/check_bytecode_matching_on_demand.ex
@@ -1,4 +1,4 @@
-defmodule Explorer.Chain.Checker.CheckBytecodeMatchingOnDemand do
+defmodule Explorer.Chain.Fetcher.CheckBytecodeMatchingOnDemand do
   @moduledoc """
     On demand checker if bytecode written in BlockScout's DB equals to bytecode stored on node (only for verified contracts)
   """
@@ -8,16 +8,10 @@ defmodule Explorer.Chain.Checker.CheckBytecodeMatchingOnDemand do
   alias Ecto.Association.NotLoaded
   alias Ecto.Changeset
   alias Explorer.Repo
-  alias Explorer.Counters.Helper
-
-  require Logger
 
   # seconds
   @check_bytecode_interval 86_400
 
-  # cache needed to keep track of transactions which are already being processed
-  @cache_name :bytecode_matching_processing
-
   def trigger_check(_address, %NotLoaded{}) do
     :ignore
   end
@@ -62,8 +56,6 @@ defmodule Explorer.Chain.Checker.CheckBytecodeMatchingOnDemand do
           :error
       end
     end
-
-    :ets.delete(@cache_name, to_string(address.hash))
   end
 
   def start_link(_) do
@@ -72,23 +64,12 @@ defmodule Explorer.Chain.Checker.CheckBytecodeMatchingOnDemand do
 
   @impl true
   def init(opts) do
-    Helper.create_cache_table(@cache_name)
-
     {:ok, opts}
   end
 
   @impl true
   def handle_cast({:check, address}, state) do
-    hash_string = to_string(address.hash)
-
-    case Helper.fetch_from_cache(hash_string, @cache_name) do
-      0 ->
-        :ets.insert(@cache_name, {hash_string, 1})
-        check_bytecode_matching(address)
-
-      1 ->
-        :ignore
-    end
+    check_bytecode_matching(address)
 
     {:noreply, state}
   end
diff --git a/apps/explorer/lib/explorer/chain/fetcher/fetch_validator_info_on_demand.ex b/apps/explorer/lib/explorer/chain/fetcher/fetch_validator_info_on_demand.ex
new file mode 100644
index 0000000000..495f614634
--- /dev/null
+++ b/apps/explorer/lib/explorer/chain/fetcher/fetch_validator_info_on_demand.ex
@@ -0,0 +1,69 @@
+defmodule Explorer.Chain.Fetcher.FetchValidatorInfoOnDemand do
+  @moduledoc """
+    On demand fetcher info about validator
+  """
+
+  use GenServer
+
+  alias Explorer.Application.Constants
+  alias Explorer.Chain.Block.Reward
+  alias Explorer.Chain.Cache.BlockNumber
+  alias Explorer.Chain.Validator
+
+  def trigger_fetch(address_hash) do
+    GenServer.cast(__MODULE__, {:fetch_or_update, address_hash})
+  end
+
+  defp actualize_validator_info(address_hash) do
+    contract_address_from_db = Constants.get_keys_manager_contract_address()
+
+    contract_address_from_env =
+      Application.get_env(:explorer, Explorer.Chain.Block.Reward, %{})[:keys_manager_contract_address]
+
+    cond do
+      is_nil(contract_address_from_env) ->
+        :ignore
+
+      is_nil(contract_address_from_db) ->
+        Validator.drop_all_validators()
+        Constants.insert_keys_manager_contract_address(contract_address_from_env)
+        fetch_and_store_validator_info(address_hash)
+
+      String.downcase(contract_address_from_db.value) == contract_address_from_env |> String.downcase() ->
+        fetch_and_store_validator_info(address_hash)
+
+      true ->
+        Validator.drop_all_validators()
+        Constants.insert_keys_manager_contract_address(contract_address_from_env)
+        fetch_and_store_validator_info(address_hash)
+    end
+  end
+
+  defp fetch_and_store_validator_info(validator_address) do
+    validator = Validator.get_validator_by_address_hash(validator_address)
+    %{is_validator: is_validator, payout_key: payout_key} = Reward.get_validator_payout_key_by_mining(validator_address)
+
+    Validator.insert_or_update(validator, %{
+      address_hash: validator_address,
+      is_validator: is_validator,
+      payout_key_hash: payout_key,
+      last_block_updated_at: BlockNumber.get_max()
+    })
+  end
+
+  def start_link(_) do
+    GenServer.start_link(__MODULE__, :ok, name: __MODULE__)
+  end
+
+  @impl true
+  def init(opts) do
+    {:ok, opts}
+  end
+
+  @impl true
+  def handle_cast({:fetch_or_update, address_hash}, state) do
+    actualize_validator_info(address_hash)
+
+    {:noreply, state}
+  end
+end
diff --git a/apps/explorer/lib/explorer/chain/validator.ex b/apps/explorer/lib/explorer/chain/validator.ex
new file mode 100644
index 0000000000..5897776d5e
--- /dev/null
+++ b/apps/explorer/lib/explorer/chain/validator.ex
@@ -0,0 +1,56 @@
+defmodule Explorer.Chain.Validator do
+  @moduledoc """
+    Tracks info about POA validator
+  """
+
+  use Explorer.Schema
+  alias Explorer.Chain.Hash.Address
+  alias Explorer.Repo
+
+  @primary_key false
+  schema "validators" do
+    field(:address_hash, Address, primary_key: true)
+    field(:is_validator, :boolean)
+    field(:payout_key_hash, Address)
+    field(:last_block_updated_at, :integer)
+
+    timestamps()
+  end
+
+  def insert_or_update(nil, attrs) do
+    attrs
+    |> changeset()
+    |> Repo.insert()
+  end
+
+  def insert_or_update(validator, attrs) do
+    validator
+    |> changeset(attrs)
+    |> Repo.update()
+  end
+
+  def changeset(attrs) do
+    %__MODULE__{}
+    |> changeset(attrs)
+  end
+
+  @required_attrs ~w(address_hash)a
+  @optional_attrs ~w(is_validator payout_key_hash last_block_updated_at)a
+  def changeset(%__MODULE__{} = constant, attrs) do
+    constant
+    |> cast(attrs, @required_attrs ++ @optional_attrs)
+    |> validate_required(@required_attrs)
+    |> unique_constraint(:address_hash)
+  end
+
+  def get_validator_by_address_hash(address_hash) do
+    __MODULE__
+    |> where([validator], validator.address_hash == ^address_hash)
+    |> Repo.one()
+  end
+
+  def drop_all_validators() do
+    __MODULE__
+    |> Repo.delete_all()
+  end
+end
diff --git a/apps/explorer/priv/repo/migrations/20230214104917_add_validators_and_constants_tables.exs b/apps/explorer/priv/repo/migrations/20230214104917_add_validators_and_constants_tables.exs
new file mode 100644
index 0000000000..690f039d65
--- /dev/null
+++ b/apps/explorer/priv/repo/migrations/20230214104917_add_validators_and_constants_tables.exs
@@ -0,0 +1,21 @@
+defmodule Explorer.Repo.Migrations.AddValidatorsAndConstantsTables do
+  use Ecto.Migration
+
+  def change do
+    create table(:constants, primary_key: false) do
+      add(:key, :string, primary_key: true, null: false)
+      add(:value, :string)
+
+      timestamps()
+    end
+
+    create table(:validators, primary_key: false) do
+      add(:address_hash, :bytea, primary_key: true, null: false)
+      add(:is_validator, :boolean)
+      add(:payout_key_hash, :bytea)
+      add(:last_block_updated_at, :bigint)
+
+      timestamps()
+    end
+  end
+end
diff --git a/apps/indexer/lib/indexer/fetcher/first_trace_on_demand.ex b/apps/indexer/lib/indexer/fetcher/first_trace_on_demand.ex
index 04ba5873d4..10bbc181dd 100644
--- a/apps/indexer/lib/indexer/fetcher/first_trace_on_demand.ex
+++ b/apps/indexer/lib/indexer/fetcher/first_trace_on_demand.ex
@@ -9,13 +9,9 @@ defmodule Indexer.Fetcher.FirstTraceOnDemand do
   alias Explorer.Chain
   alias Explorer.Chain.Import
   alias Explorer.Chain.Import.Runner.InternalTransactions
-  alias Explorer.Counters.Helper
 
   require Logger
 
-  # cache needed to keep track of transactions which are already being processed
-  @cache_name :first_traces_processing
-
   def trigger_fetch(transaction) do
     GenServer.cast(__MODULE__, {:fetch, transaction})
   end
@@ -52,8 +48,6 @@ defmodule Indexer.Fetcher.FirstTraceOnDemand do
       :ignore ->
         :ignore
     end
-
-    :ets.delete(@cache_name, hash_string)
   end
 
   def start_link([init_opts, server_opts]) do
@@ -62,23 +56,12 @@ defmodule Indexer.Fetcher.FirstTraceOnDemand do
 
   @impl true
   def init(json_rpc_named_arguments) do
-    Helper.create_cache_table(@cache_name)
-
     {:ok, %{json_rpc_named_arguments: json_rpc_named_arguments}}
   end
 
   @impl true
   def handle_cast({:fetch, transaction}, state) do
-    hash_string = to_string(transaction.hash)
-
-    case Helper.fetch_from_cache(hash_string, @cache_name) do
-      0 ->
-        :ets.insert(@cache_name, {hash_string, 1})
-        fetch_first_trace(transaction, state)
-
-      1 ->
-        :ignore
-    end
+    fetch_first_trace(transaction, state)
 
     {:noreply, state}
   end