added paybackOnBehalfOf() - Optimism

contracts/optimism/connectors/aave/v3/events.sol

@@ -54,4 +54,12 @@ contract Events {
 		uint256 getId,
 		uint256 setId
 	);
+	event LogPaybackOnBehalfOf(
+		address token,
+		uint256 amt,
+		uint256 rateMode,
+		address onBehalfOf,
+		uint256 getId,
+		uint256 setId
+	);
 }

contracts/optimism/connectors/aave/v3/helpers.sol

@@ -50,6 +50,21 @@ abstract contract Helpers is DSMath, Basic {
 		return rateMode == 1 ? stableDebt : variableDebt;
 	}
 
+	/**
+	 * @dev Get OnBehalfOf user's total debt balance & fee for an asset
+	 * @param token token address of the debt.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
+	 * @param rateMode Borrow rate mode (Stable = 1, Variable = 2)
+	 */
+	function getOnBehalfOfPaybackBalance(address token, uint256 rateMode, address onBehalfOf)
+		internal
+		view
+		returns (uint256)
+	{
+		(, uint256 stableDebt, uint256 variableDebt, , , , , , ) = aaveData
+			.getUserReserveData(token, onBehalfOf);
+		return rateMode == 1 ? stableDebt : variableDebt;
+	}
+
 	/**
 	 * @dev Get total collateral balance for an asset
 	 * @param token token address of the collateral.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)

contracts/optimism/connectors/aave/v3/main.sol

@@ -313,6 +313,51 @@ abstract contract AaveResolver is Events, Helpers {
 		_eventParam = abi.encode(token, _amt, rateMode, getId, setId);
 	}
 
+	/**
+	 * @dev Payback borrowed ETH/ERC20_Token on behalf of a user.
+	 * @notice Payback debt owed on behalf os a user.
+	 * @param token The address of the token to payback.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
+	 * @param amt The amount of the token to payback. (For max: `uint256(-1)`)
+	 * @param rateMode The type of debt paying back. (For Stable: 1, Variable: 2)
+	 * @param onBehalfOf Address of user who's debt to repay.
+	 * @param getId ID to retrieve amt.
+	 * @param setId ID stores the amount of tokens paid back.
+	 */
+	function paybackOnBehalfOf(
+		address token,
+		uint256 amt,
+		uint256 rateMode,
+		address onBehalfOf,
+		uint256 getId,
+		uint256 setId
+	)
+		external
+		payable
+		returns (string memory _eventName, bytes memory _eventParam)
+	{
+		uint256 _amt = getUint(getId, amt);
+
+		AaveInterface aave = AaveInterface(aaveProvider.getPool());
+
+		bool isEth = token == ethAddr;
+		address _token = isEth ? wethAddr : token;
+
+		TokenInterface tokenContract = TokenInterface(_token);
+
+		_amt = _amt == uint256(-1) ? getOnBehalfOfPaybackBalance(_token, rateMode, onBehalfOf) : _amt;
+
+		if (isEth) convertEthToWeth(isEth, tokenContract, _amt);
+
+		approve(tokenContract, address(aave), _amt);
+
+		aave.repay(_token, _amt, rateMode, onBehalfOf);
+
+		setUint(setId, _amt);
+
+		_eventName = "LogPaybackOnBehalfOf(address,uint256,uint256,address,uint256,uint256)";
+		_eventParam = abi.encode(token, _amt, rateMode, onBehalfOf, getId, setId);
+	}
+
 	/**
 	 * @dev Enable collateral
 	 * @notice Enable an array of tokens as collateral

contracts/polygon/connectors/aave/v3/main.sol

@@ -314,7 +314,7 @@ abstract contract AaveResolver is Events, Helpers {
 	}
 
 	/**
-	 * @dev Payback borrowed matic/ERC20_Token on behalf os a user.
+	 * @dev Payback borrowed matic/ERC20_Token on behalf of a user.
 	 * @notice Payback debt owed on behalf os a user.
 	 * @param token The address of the token to payback.(For matic: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
 	 * @param amt The amount of the token to payback. (For max: `uint256(-1)`)