diff --git a/contracts/base/connectors/instapool_v4/events.sol b/contracts/base/connectors/instapool_v4/events.sol new file mode 100644 index 00000000..9fc1cd40 --- /dev/null +++ b/contracts/base/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/base/connectors/instapool_v4/interfaces.sol b/contracts/base/connectors/instapool_v4/interfaces.sol new file mode 100644 index 00000000..c5a40fd4 --- /dev/null +++ b/contracts/base/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/base/connectors/instapool_v4/main.sol b/contracts/base/connectors/instapool_v4/main.sol new file mode 100644 index 00000000..da3a159f --- /dev/null +++ b/contracts/base/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/base/connectors/instapool_v4/variables.sol b/contracts/base/connectors/instapool_v4/variables.sol new file mode 100644 index 00000000..27d0f5dd --- /dev/null +++ b/contracts/base/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(0xA18519a6bb1282954e933DA0A775924E4CcE6019); + +} \ No newline at end of file