Merge pull request #269 from Instadapp/instalite-b

InstaLite ImportPosition

contracts/mainnet/connectors/instaLite_import/events.sol

@@ -0,0 +1,15 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+contract Events {
+	event LogImport(
+		address flashTkn,
+		uint256 flashAmt,
+		uint256 route,
+		uint256 stEthAmt,
+		uint256 wethAmt,
+		uint256 iEthAmount,
+		uint256[] getIds,
+		uint256 setId
+	);
+}

contracts/mainnet/connectors/instaLite_import/interface.sol

@@ -0,0 +1,15 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+interface IInstaLite {
+	function balanceOf(address account) external view virtual returns (uint256);
+
+	function importPosition(
+		address flashTkn_,
+		uint256 flashAmt_,
+		uint256 route_,
+		address to_,
+		uint256 stEthAmt_,
+		uint256 wethAmt_
+	) external;
+}

contracts/mainnet/connectors/instaLite_import/main.sol

@@ -0,0 +1,84 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+/**
+ * @title InstaLite Connector
+ * @dev Import Position
+ */
+
+import { TokenInterface } from "../../common/interfaces.sol";
+import { Basic } from "../../common/basic.sol";
+import { Events } from "./events.sol";
+import { IInstaLite } from "./interface.sol";
+
+abstract contract InstaLiteConnector is Events, Basic {
+	TokenInterface internal constant astethToken =
+		TokenInterface(0x1982b2F5814301d4e9a8b0201555376e62F82428);
+	TokenInterface internal constant stethToken =
+		TokenInterface(0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84);
+	IInstaLite internal constant iEth =
+		IInstaLite(0xc383a3833A87009fD9597F8184979AF5eDFad019);
+
+	address internal constant iEthDSA =
+		0x94269A09c5Fcbd5e88F9DF13741997bc11735a9c;
+
+	/**
+	 * @dev Supply ETH/ERC20
+	 * @notice Supply a token into Instalite.
+	 * @param flashTkn_ Address of flash token.
+	 * @param flashAmt_ Flash loan amount.
+	 * @param route_ Flash loan route.
+	 * @param stEthAmt_ Amount of astEthToken to be imported.
+	 * @param wethAmt_ Amount of weth borrows to be imported.
+	 * @param getIds IDs to retrieve amt.
+	 * @param setId ID to store balanceOf of iEth.
+	 */
+	function importPosition(
+		address flashTkn_,
+		uint256 flashAmt_,
+		uint256 route_,
+		uint256 stEthAmt_,
+		uint256 wethAmt_,
+		uint256[] memory getIds,
+		uint256 setId
+	) external returns (string memory eventName_, bytes memory eventParam_) {
+		uint256 stEthAmt_ = getUint(getIds[0], stEthAmt_);
+		uint256 wethAmt_ = getUint(getIds[1], wethAmt_);
+		stEthAmt_ = stEthAmt_ == type(uint256).max
+			? astethToken.balanceOf(msg.sender)
+			: stEthAmt_;
+
+		astethToken.approve(iEthDSA, stEthAmt_);
+		uint256 initialBal = iEth.balanceOf(address(this));
+
+		iEth.importPosition(
+			flashTkn_,
+			flashAmt_,
+			route_,
+			address(this),
+			stEthAmt_,
+			wethAmt_
+		);
+
+		uint256 finalBalance = iEth.balanceOf(address(this));
+		uint256 iEthAmt_ = finalBalance - initialBal;
+
+		setUint(setId, iEthAmt_);
+
+		eventName_ = "LogImport(address,uint256,uint256,uint256,uint256,uint256,uint256[],uint256)";
+		eventParam_ = abi.encode(
+			flashTkn_,
+			flashAmt_,
+			route_,
+			stEthAmt_,
+			wethAmt_,
+			iEthAmt_,
+			getIds,
+			setId
+		);
+	}
+}
+
+contract ConnectV2InstaLiteImport is InstaLiteConnector {
+	string public constant name = "InstaLite-Import-v1.0";
+}