From 777cabefbb90d2b00c4dedfb7d0964e097678726 Mon Sep 17 00:00:00 2001
From: Grigoriy Simonov <gsimonov@usetech.com>
Date: Mon, 11 Sep 2023 07:21:01 +0000
Subject: [PATCH] docs: add documentation to `OnCheckEvmTransaction` trait

---
 frame/evm/src/lib.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/frame/evm/src/lib.rs b/frame/evm/src/lib.rs
index d01faaae1d..804e907cbf 100644
--- a/frame/evm/src/lib.rs
+++ b/frame/evm/src/lib.rs
@@ -1051,13 +1051,20 @@ impl<T> OnCreate<T> for Tuple {
 	}
 }
 
+/// Implements additional EVM transaction validation logic
 pub trait OnCheckEvmTransaction<T: Config> {
+	/// Validate EVM transaction.
+	///
+	/// This method should be called before frontier's built-in validations.
+	///
+	/// - `v`: Transaction data to validate. Method can modify transaction data before frontier's built-in validations.
 	fn on_check_evm_transaction(
 		v: &mut CheckEvmTransaction,
 		origin: &H160,
 	) -> Result<(), TransactionValidationError>;
 }
 
+/// Implementation for () does not specify any additional validations.
 impl<T: Config> OnCheckEvmTransaction<T> for () {
 	fn on_check_evm_transaction(
 		_v: &mut CheckEvmTransaction,