--- a/pallets/evm-contract-helpers/src/stubs/ContractHelpers.sol
+++ b/pallets/evm-contract-helpers/src/stubs/ContractHelpers.sol
@@ -171,7 +171,7 @@
 	}
 
 	/// Get current contract sponsoring rate limit
-	/// @param contractAddress Contract to get sponsoring mode of
+	/// @param contractAddress Contract to get sponsoring rate limit of
 	/// @return uint32 Amount of blocks between two sponsored transactions
 	/// @dev EVM selector for this function is: 0x610cfabd,
 	///  or in textual repr: getSponsoringRateLimit(address)
@@ -203,6 +203,12 @@
 		dummy = 0;
 	}
 
+	/// Set contract sponsoring fee limit
+	/// @dev Sponsoring fee limit - is maximum fee that could be spent by
+	///  single transaction
+	/// @param contractAddress Contract to change sponsoring fee limit of
+	/// @param feeLimit Fee limit
+	/// @dev Only contract owner can change this setting
 	/// @dev EVM selector for this function is: 0x03aed665,
 	///  or in textual repr: setSponsoringFeeLimit(address,uint256)
 	function setSponsoringFeeLimit(address contractAddress, uint256 feeLimit)
@@ -214,6 +220,10 @@
 		dummy = 0;
 	}
 
+	/// Get current contract sponsoring fee limit
+	/// @param contractAddress Contract to get sponsoring fee limit of
+	/// @return uint256 Maximum amount of fee that could be spent by single
+	///  transaction
 	/// @dev EVM selector for this function is: 0xc3fdc9ee,
 	///  or in textual repr: getSponsoringFeeLimit(address)
 	function getSponsoringFeeLimit(address contractAddress)
--- a/tests/src/eth/api/ContractHelpers.sol
+++ b/tests/src/eth/api/ContractHelpers.sol
@@ -111,7 +111,7 @@
 	function setSponsoringMode(address contractAddress, uint8 mode) external;
 
 	/// Get current contract sponsoring rate limit
-	/// @param contractAddress Contract to get sponsoring mode of
+	/// @param contractAddress Contract to get sponsoring rate limit of
 	/// @return uint32 Amount of blocks between two sponsored transactions
 	/// @dev EVM selector for this function is: 0x610cfabd,
 	///  or in textual repr: getSponsoringRateLimit(address)
@@ -131,11 +131,21 @@
 	function setSponsoringRateLimit(address contractAddress, uint32 rateLimit)
 		external;
 
+	/// Set contract sponsoring fee limit
+	/// @dev Sponsoring fee limit - is maximum fee that could be spent by
+	///  single transaction
+	/// @param contractAddress Contract to change sponsoring fee limit of
+	/// @param feeLimit Fee limit
+	/// @dev Only contract owner can change this setting
 	/// @dev EVM selector for this function is: 0x03aed665,
 	///  or in textual repr: setSponsoringFeeLimit(address,uint256)
 	function setSponsoringFeeLimit(address contractAddress, uint256 feeLimit)
 		external;
 
+	/// Get current contract sponsoring fee limit
+	/// @param contractAddress Contract to get sponsoring fee limit of
+	/// @return uint256 Maximum amount of fee that could be spent by single
+	///  transaction
 	/// @dev EVM selector for this function is: 0xc3fdc9ee,
 	///  or in textual repr: getSponsoringFeeLimit(address)
 	function getSponsoringFeeLimit(address contractAddress)