diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex
index 5917b953bb..635451c9bc 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex
@@ -63,6 +63,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
 
   @api_true [api?: true]
 
+  @spec transaction(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def transaction(conn, %{"transaction_hash_param" => transaction_hash_string} = params) do
     necessity_by_association =
       @transaction_necessity_by_association
@@ -89,6 +90,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     end
   end
 
+  @spec transactions(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def transactions(conn, params) do
     filter_options = filter_options(params, :validated)
 
@@ -112,6 +114,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     |> render(:transactions, %{transactions: transactions, next_page_params: next_page_params})
   end
 
+  @spec zkevm_batch(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def zkevm_batch(conn, %{"batch_number" => batch_number} = _params) do
     transactions =
       batch_number
@@ -124,6 +127,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     |> render(:transactions, %{transactions: transactions})
   end
 
+  @spec raw_trace(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def raw_trace(conn, %{"transaction_hash_param" => transaction_hash_string} = params) do
     with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
          {:not_found, {:ok, transaction}} <-
@@ -153,6 +157,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     end
   end
 
+  @spec token_transfers(Plug.Conn.t(), map()) :: Plug.Conn.t() | {atom(), any()}
   def token_transfers(conn, %{"transaction_hash_param" => transaction_hash_string} = params) do
     with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
          {:not_found, {:ok, transaction}} <-
@@ -185,6 +190,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     end
   end
 
+  @spec internal_transactions(Plug.Conn.t(), map()) :: Plug.Conn.t() | {atom(), any()}
   def internal_transactions(conn, %{"transaction_hash_param" => transaction_hash_string} = params) do
     with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
          {:not_found, {:ok, transaction}} <-
@@ -213,6 +219,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     end
   end
 
+  @spec logs(Plug.Conn.t(), map()) :: Plug.Conn.t() | {atom(), any()}
   def logs(conn, %{"transaction_hash_param" => transaction_hash_string} = params) do
     with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
          {:not_found, {:ok, transaction}} <-
@@ -248,6 +255,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     end
   end
 
+  @spec state_changes(Plug.Conn.t(), map()) :: Plug.Conn.t() | {atom(), any()}
   def state_changes(conn, %{"transaction_hash_param" => transaction_hash_string} = params) do
     with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
          {:not_found, {:ok, transaction}} <-
@@ -274,6 +282,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     end
   end
 
+  @spec watchlist_transactions(Plug.Conn.t(), map()) :: Plug.Conn.t() | {atom(), any()}
   def watchlist_transactions(conn, params) do
     with {:auth, %{watchlist_id: watchlist_id}} <- {:auth, current_user(conn)} do
       full_options =
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/zkevm_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/zkevm_controller.ex
index b81cdea24b..a03cc0359c 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/zkevm_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/zkevm_controller.ex
@@ -8,7 +8,6 @@ defmodule BlockScoutWeb.API.V2.ZkevmController do
       split_list_by_page: 1
     ]
 
-  alias Explorer.Chain
   alias Explorer.Chain.Zkevm.Reader
 
   action_fallback(BlockScoutWeb.API.V2.FallbackController)
@@ -23,6 +22,7 @@ defmodule BlockScoutWeb.API.V2.ZkevmController do
     :sequence_transaction => :optional
   }
 
+  @spec batch(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def batch(conn, %{"batch_number" => batch_number} = _params) do
     {:ok, batch} =
       Reader.batch(
@@ -36,12 +36,14 @@ defmodule BlockScoutWeb.API.V2.ZkevmController do
     |> render(:zkevm_batch, %{batch: batch})
   end
 
+  @spec batch_latest_number(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def batch_latest_number(conn, _params) do
     conn
     |> put_status(200)
     |> render(:zkevm_batch_latest_number, %{number: batch_latest_number()})
   end
 
+  @spec batches(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def batches(conn, params) do
     {batches, next_page} =
       params
@@ -61,12 +63,14 @@ defmodule BlockScoutWeb.API.V2.ZkevmController do
     })
   end
 
+  @spec batches_count(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def batches_count(conn, _params) do
     conn
     |> put_status(200)
     |> render(:zkevm_batches_count, %{count: batch_latest_number()})
   end
 
+  @spec batches_confirmed(Plug.Conn.t(), map()) :: Plug.Conn.t()
   def batches_confirmed(conn, _params) do
     batches =
       []
diff --git a/apps/block_scout_web/lib/block_scout_web/views/api/v2/zkevm_view.ex b/apps/block_scout_web/lib/block_scout_web/views/api/v2/zkevm_view.ex
index a504f72d48..e0bc5b4355 100644
--- a/apps/block_scout_web/lib/block_scout_web/views/api/v2/zkevm_view.ex
+++ b/apps/block_scout_web/lib/block_scout_web/views/api/v2/zkevm_view.ex
@@ -1,6 +1,7 @@
 defmodule BlockScoutWeb.API.V2.ZkevmView do
   use BlockScoutWeb, :view
 
+  @spec render(binary(), map()) :: map() | non_neg_integer()
   def render("zkevm_batch.json", %{batch: batch}) do
     sequence_tx_hash =
       if not is_nil(batch.sequence_transaction) do
diff --git a/apps/explorer/lib/explorer/chain/import/runner/zkevm/batch_transactions.ex b/apps/explorer/lib/explorer/chain/import/runner/zkevm/batch_transactions.ex
index 997f53a517..2df1223945 100644
--- a/apps/explorer/lib/explorer/chain/import/runner/zkevm/batch_transactions.ex
+++ b/apps/explorer/lib/explorer/chain/import/runner/zkevm/batch_transactions.ex
@@ -24,6 +24,7 @@ defmodule Explorer.Chain.Import.Runner.Zkevm.BatchTransactions do
   def option_key, do: :zkevm_batch_transactions
 
   @impl Import.Runner
+  @spec imported_table_row() :: %{:value_description => binary(), :value_type => binary()}
   def imported_table_row do
     %{
       value_type: "[#{ecto_schema_module()}.t()]",
@@ -32,6 +33,7 @@ defmodule Explorer.Chain.Import.Runner.Zkevm.BatchTransactions do
   end
 
   @impl Import.Runner
+  @spec run(Multi.t(), list(), map()) :: Multi.t()
   def run(multi, changes_list, %{timestamps: timestamps} = options) do
     insert_options =
       options
diff --git a/apps/explorer/lib/explorer/chain/import/runner/zkevm/lifecycle_transactions.ex b/apps/explorer/lib/explorer/chain/import/runner/zkevm/lifecycle_transactions.ex
index 504b5e609a..7a5e4c1327 100644
--- a/apps/explorer/lib/explorer/chain/import/runner/zkevm/lifecycle_transactions.ex
+++ b/apps/explorer/lib/explorer/chain/import/runner/zkevm/lifecycle_transactions.ex
@@ -26,6 +26,7 @@ defmodule Explorer.Chain.Import.Runner.Zkevm.LifecycleTransactions do
   def option_key, do: :zkevm_lifecycle_transactions
 
   @impl Import.Runner
+  @spec imported_table_row() :: %{:value_description => binary(), :value_type => binary()}
   def imported_table_row do
     %{
       value_type: "[#{ecto_schema_module()}.t()]",
@@ -34,6 +35,7 @@ defmodule Explorer.Chain.Import.Runner.Zkevm.LifecycleTransactions do
   end
 
   @impl Import.Runner
+  @spec run(Multi.t(), list(), map()) :: Multi.t()
   def run(multi, changes_list, %{timestamps: timestamps} = options) do
     insert_options =
       options
diff --git a/apps/explorer/lib/explorer/chain/import/runner/zkevm/transaction_batches.ex b/apps/explorer/lib/explorer/chain/import/runner/zkevm/transaction_batches.ex
index 3740443658..db9f2771ea 100644
--- a/apps/explorer/lib/explorer/chain/import/runner/zkevm/transaction_batches.ex
+++ b/apps/explorer/lib/explorer/chain/import/runner/zkevm/transaction_batches.ex
@@ -26,6 +26,7 @@ defmodule Explorer.Chain.Import.Runner.Zkevm.TransactionBatches do
   def option_key, do: :zkevm_transaction_batches
 
   @impl Import.Runner
+  @spec imported_table_row() :: %{:value_description => binary(), :value_type => binary()}
   def imported_table_row do
     %{
       value_type: "[#{ecto_schema_module()}.t()]",
@@ -34,6 +35,7 @@ defmodule Explorer.Chain.Import.Runner.Zkevm.TransactionBatches do
   end
 
   @impl Import.Runner
+  @spec run(Multi.t(), list(), map()) :: Multi.t()
   def run(multi, changes_list, %{timestamps: timestamps} = options) do
     insert_options =
       options
diff --git a/apps/explorer/lib/explorer/chain/zkevm/batch_transaction.ex b/apps/explorer/lib/explorer/chain/zkevm/batch_transaction.ex
index 1dc780ebf2..64993ad2bf 100644
--- a/apps/explorer/lib/explorer/chain/zkevm/batch_transaction.ex
+++ b/apps/explorer/lib/explorer/chain/zkevm/batch_transaction.ex
@@ -23,6 +23,7 @@ defmodule Explorer.Chain.Zkevm.BatchTransaction do
     timestamps()
   end
 
+  @spec changeset(Ecto.Schema.t(), map()) :: Ecto.Schema.t()
   def changeset(%__MODULE__{} = transactions, attrs \\ %{}) do
     transactions
     |> cast(attrs, @required_attrs)
diff --git a/apps/explorer/lib/explorer/chain/zkevm/lifecycle_transaction.ex b/apps/explorer/lib/explorer/chain/zkevm/lifecycle_transaction.ex
index dc81b4a81b..83ddcfa296 100644
--- a/apps/explorer/lib/explorer/chain/zkevm/lifecycle_transaction.ex
+++ b/apps/explorer/lib/explorer/chain/zkevm/lifecycle_transaction.ex
@@ -24,6 +24,7 @@ defmodule Explorer.Chain.Zkevm.LifecycleTransaction do
     timestamps()
   end
 
+  @spec changeset(Ecto.Schema.t(), map()) :: Ecto.Schema.t()
   def changeset(%__MODULE__{} = txn, attrs \\ %{}) do
     txn
     |> cast(attrs, @required_attrs)
diff --git a/apps/explorer/lib/explorer/chain/zkevm/reader.ex b/apps/explorer/lib/explorer/chain/zkevm/reader.ex
index 782cf3f94a..436ae787e8 100644
--- a/apps/explorer/lib/explorer/chain/zkevm/reader.ex
+++ b/apps/explorer/lib/explorer/chain/zkevm/reader.ex
@@ -15,6 +15,7 @@ defmodule Explorer.Chain.Zkevm.Reader do
   alias Explorer.Chain.Zkevm.{BatchTransaction, LifecycleTransaction, TransactionBatch}
   alias Explorer.{Chain, PagingOptions, Repo}
 
+  @spec batch(non_neg_integer() | :latest, list()) :: {:ok, map()} | {:error, :not_found}
   def batch(number, options \\ [])
 
   def batch(:latest, options) when is_list(options) do
diff --git a/apps/explorer/lib/explorer/chain/zkevm/transaction_batch.ex b/apps/explorer/lib/explorer/chain/zkevm/transaction_batch.ex
index 683daf9c1e..1b4aa046dc 100644
--- a/apps/explorer/lib/explorer/chain/zkevm/transaction_batch.ex
+++ b/apps/explorer/lib/explorer/chain/zkevm/transaction_batch.ex
@@ -45,6 +45,7 @@ defmodule Explorer.Chain.Zkevm.TransactionBatch do
     timestamps()
   end
 
+  @spec changeset(Ecto.Schema.t(), map()) :: Ecto.Schema.t()
   def changeset(%__MODULE__{} = batches, attrs \\ %{}) do
     batches
     |> cast(attrs, @required_attrs ++ @optional_attrs)