added connector

contracts/mainnet/connectors/lido_stETH/events.sol

@@ -0,0 +1,5 @@
+pragma solidity ^0.7.0;
+
+contract Events {
+	event LogDeposit(uint256 Amt, uint256 getId, uint256 setId);
+}

contracts/mainnet/connectors/lido_stETH/helpers.sol

@@ -0,0 +1,10 @@
+pragma solidity ^0.7.0;
+
+import { TokenInterface } from "../../common/interfaces.sol";
+import { ILido } from "./interface.sol";
+
+abstract contract Helpers {
+	ILido internal constant lidoInterface =
+		ILido(0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84);
+}
+//0xC7B5aF82B05Eb3b64F12241B04B2cF14469E39F7

contracts/mainnet/connectors/lido_stETH/interface.sol

@@ -0,0 +1,7 @@
+pragma solidity ^0.7.0;
+
+interface ILido {
+	function submit(address _referral) external payable returns (uint256);
+
+	function balanceOf(address owner) external view returns (uint256);
+}

contracts/mainnet/connectors/lido_stETH/main.sol

@@ -0,0 +1,43 @@
+pragma solidity ^0.7.0;
+
+/**
+ * @title WETH.
+ * @dev Wrap and Unwrap WETH.
+ */
+
+import { DSMath } from "../../common/math.sol";
+import { Basic } from "../../common/basic.sol";
+import { Events } from "./events.sol";
+import { Helpers } from "./helpers.sol";
+
+abstract contract Resolver is Events, DSMath, Basic, Helpers {
+	/**
+	 * @dev deposit ETH into Lido.
+	 * @notice sends Eth into lido and in return you get equivalent of stEth tokens
+	 * @param amt The amount of ETH to deposit. (For max: `uint256(-1)`)
+	 * @param getId ID to retrieve amt.
+	 * @param setId ID stores the amount of ETH deposited.
+	 */
+	function deposit(
+		uint256 amt,
+		uint256 getId,
+		uint256 setId
+	)
+		public
+		payable
+		returns (string memory _eventName, bytes memory _eventParam)
+	{
+		uint256 _amt = getUint(getId, amt);
+
+		_amt = _amt == uint256(-1) ? address(this).balance : _amt;
+		lidoInterface.submit{ value: amt }(address(0));
+		setUint(setId, _amt);
+
+		_eventName = "LogDeposit(uint256,uint256,uint256)";
+		_eventParam = abi.encode(_amt, getId, setId);
+	}
+}
+
+contract ConnectV2LidoStEth is Resolver {
+	string public constant name = "LidoStEth-v1.0";
+}