diff --git a/contracts/optimism/connectors/instapool_v4/events.sol b/contracts/optimism/connectors/instapool_v4/events.sol
new file mode 100644
index 00000000..9fc1cd40
--- /dev/null
+++ b/contracts/optimism/connectors/instapool_v4/events.sol
@@ -0,0 +1,10 @@
+pragma solidity >=0.7.0;
+pragma experimental ABIEncoderV2;
+
+contract Events {
+ event LogFlashBorrow(address token, uint256 tokenAmt);
+ event LogFlashPayback(address token, uint256 tokenAmt);
+
+ event LogFlashMultiBorrow(address[] token, uint256[] tokenAmts);
+ event LogFlashMultiPayback(address[] token, uint256[] tokenAmts);
+}
\ No newline at end of file
diff --git a/contracts/optimism/connectors/instapool_v4/interfaces.sol b/contracts/optimism/connectors/instapool_v4/interfaces.sol
new file mode 100644
index 00000000..c5a40fd4
--- /dev/null
+++ b/contracts/optimism/connectors/instapool_v4/interfaces.sol
@@ -0,0 +1,11 @@
+pragma solidity >=0.7.0;
+pragma experimental ABIEncoderV2;
+
+interface InstaFlashV4Interface {
+ function flashLoan(address[] memory tokens, uint256[] memory amts, uint route, bytes memory data, bytes memory extraData) external;
+}
+
+interface AccountInterface {
+ function enable(address) external;
+ function disable(address) external;
+}
diff --git a/contracts/optimism/connectors/instapool_v4/main.sol b/contracts/optimism/connectors/instapool_v4/main.sol
new file mode 100644
index 00000000..da3a159f
--- /dev/null
+++ b/contracts/optimism/connectors/instapool_v4/main.sol
@@ -0,0 +1,136 @@
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+/**
+ * @title Instapool.
+ * @dev Inbuilt Flash Loan in DSA
+ */
+
+import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
+import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import { AccountInterface } from "./interfaces.sol";
+import { Stores } from "../../common/stores.sol";
+import { Variables } from "./variables.sol";
+import { Events } from "./events.sol";
+
+contract LiquidityResolver is Stores, Variables, Events {
+ using SafeERC20 for IERC20;
+
+ /**
+ * @dev Borrow Flashloan and Cast spells.
+ * @notice Borrow Flashloan and Cast spells.
+ * @param token Token Address.
+ * @param amt Token Amount.
+ * @param route Flashloan source route.
+ * @param data targets & data for cast.
+ * @param extraData to be kept bytes(0) in most cases. Can be useful to decide data for some particular routes
+ */
+ function flashBorrowAndCast(
+ address token,
+ uint amt,
+ uint route,
+ bytes memory data,
+ bytes memory extraData
+ ) external payable returns (string memory _eventName, bytes memory _eventParam) {
+ AccountInterface(address(this)).enable(address(instaPool));
+ (string[] memory _targets, bytes[] memory callDatas) = abi.decode(data, (string[], bytes[]));
+
+ bytes memory callData_ = abi.encodeWithSignature("cast(string[],bytes[],address)", _targets, callDatas, address(instaPool));
+
+ address[] memory tokens_ = new address[](1);
+ tokens_[0] = token;
+ uint[] memory amts_ = new uint[](1);
+ amts_[0] = amt;
+ instaPool.flashLoan(tokens_, amts_, route, callData_, extraData);
+
+ AccountInterface(address(this)).disable(address(instaPool));
+
+ _eventName = "LogFlashBorrow(address,uint256)";
+ _eventParam = abi.encode(token, amt);
+ }
+
+ /**
+ * @dev Return token to InstaPool.
+ * @notice Return token to InstaPool.
+ * @param token Token Address.
+ * @param amt Token Amount.
+ * @param getId Get token amount at this ID from `InstaMemory` Contract.
+ * @param setId Set token amount at this ID in `InstaMemory` Contract.
+ */
+ function flashPayback(
+ address token,
+ uint amt,
+ uint getId,
+ uint setId
+ ) external payable returns (string memory _eventName, bytes memory _eventParam) {
+ uint _amt = getUint(getId, amt);
+
+ IERC20 tokenContract = IERC20(token);
+
+ tokenContract.safeTransfer(address(instaPool), _amt);
+
+ setUint(setId, _amt);
+
+ _eventName = "LogFlashPayback(address,uint256)";
+ _eventParam = abi.encode(token, amt);
+ }
+
+ /**
+ * @dev Borrow multi-tokens Flashloan and Cast spells.
+ * @notice Borrow multi-tokens Flashloan and Cast spells.
+ * @param tokens_ Array of Token Addresses.
+ * @param amts_ Array of Token Amounts.
+ * @param route Flashloan source route.
+ * @param data targets & data for cast.
+ * @param extraData to be kept bytes(0) in most cases. Can be useful to decide data for some particular routes
+ */
+ function flashMultiBorrowAndCast(
+ address[] memory tokens_,
+ uint[] memory amts_,
+ uint route,
+ bytes memory data,
+ bytes memory extraData
+ ) external payable returns (string memory _eventName, bytes memory _eventParam) {
+ AccountInterface(address(this)).enable(address(instaPool));
+ (string[] memory _targets, bytes[] memory callDatas) = abi.decode(data, (string[], bytes[]));
+
+ bytes memory callData_ = abi.encodeWithSignature("cast(string[],bytes[],address)", _targets, callDatas, address(instaPool));
+
+ instaPool.flashLoan(tokens_, amts_, route, callData_, extraData);
+
+ AccountInterface(address(this)).disable(address(instaPool));
+ _eventName = "LogFlashMultiBorrow(address[],uint256[])";
+ _eventParam = abi.encode(tokens_, amts_);
+ }
+
+ /**
+ * @dev Return multi-tokens to InstaPool.
+ * @notice Return multi-tokens to InstaPool.
+ * @param tokens_ Array of Token Addresses.
+ * @param amts_ Array of Token Amounts.
+ * @param getIds Array of getId token amounts.
+ * @param setIds Array of setId token amounts.
+ */
+ function flashMultiPayback(
+ address[] memory tokens_,
+ uint[] memory amts_,
+ uint[] memory getIds,
+ uint[] memory setIds
+ ) external payable returns (string memory _eventName, bytes memory _eventParam) {
+ for (uint i = 0; i < tokens_.length; i++) {
+ amts_[i] = getUint(getIds[i], amts_[i]);
+
+ IERC20(tokens_[i]).safeTransfer(address(instaPool), amts_[i]);
+
+ setUint(setIds[i], amts_[i]);
+ }
+
+ _eventName = "LogFlashMultiPayback(address[],uint256[])";
+ _eventParam = abi.encode(tokens_, amts_);
+ }
+
+}
+
+contract ConnectV2InstaPoolV4 is LiquidityResolver {
+ string public name = "Instapool-v4";
+}
diff --git a/contracts/optimism/connectors/instapool_v4/variables.sol b/contracts/optimism/connectors/instapool_v4/variables.sol
new file mode 100644
index 00000000..55016644
--- /dev/null
+++ b/contracts/optimism/connectors/instapool_v4/variables.sol
@@ -0,0 +1,13 @@
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+import { InstaFlashV4Interface } from "./interfaces.sol";
+
+contract Variables {
+
+ /**
+ * @dev Instapool contract proxy
+ */
+ InstaFlashV4Interface public constant instaPool = InstaFlashV4Interface(0x84E6b05A089d5677A702cF61dc14335b4bE5b282);
+
+}
\ No newline at end of file