mirror of
https://github.com/Instadapp/dsa-connectors-old.git
synced 2024-07-29 22:47:46 +00:00
267 lines
10 KiB
Solidity
267 lines
10 KiB
Solidity
pragma solidity ^0.6.0;
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pragma experimental ABIEncoderV2;
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// import files from common directory
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import { TokenInterface , MemoryInterface} from "../common/interfaces.sol";
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import { Stores } from "../common/stores.sol";
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import { DSMath } from "../common/math.sol";
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interface AaveInterface {
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function deposit(address _asset, uint256 _amount, address _onBehalfOf, uint16 _referralCode) external;
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function withdraw(address _asset, uint256 _amount, address _to) external;
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function borrow(
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address _asset,
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uint256 _amount,
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uint256 _interestRateMode,
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uint16 _referralCode,
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address _onBehalfOf
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) external;
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function repay(address _asset, uint256 _amount, uint256 _rateMode, address _onBehalfOf) external;
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function setUserUseReserveAsCollateral(address _asset, bool _useAsCollateral) external;
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}
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interface AaveLendingPoolProviderInterface {
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function getLendingPool() external view returns (address);
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}
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// Aave Protocol Data Provider
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interface AaveDataProviderInterface {
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function getReserveTokensAddresses(address _asset) external view returns (
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address aTokenAddress,
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address stableDebtTokenAddress,
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address variableDebtTokenAddress
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);
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function getUserReserveData(address _asset, address _user) external view returns (
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uint256 currentATokenBalance,
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uint256 currentStableDebt,
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uint256 currentVariableDebt,
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uint256 principalStableDebt,
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uint256 scaledVariableDebt,
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uint256 stableBorrowRate,
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uint256 liquidityRate,
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uint40 stableRateLastUpdated,
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bool usageAsCollateralEnabled
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);
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}
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interface AaveAddressProviderRegistryInterface {
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function getAddressesProvidersList() external view returns (address[] memory);
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}
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interface ATokenInterface {
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function balanceOf(address _user) external view returns(uint256);
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}
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contract AaveHelpers is DSMath, Stores {
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/**
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* @dev get Aave Lending Pool Provider
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*/
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function getAaveProvider() internal pure returns (AaveLendingPoolProviderInterface) {
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return AaveLendingPoolProviderInterface(0xB53C1a33016B2DC2fF3653530bfF1848a515c8c5); //mainnet
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// return AaveLendingPoolProviderInterface(0x652B2937Efd0B5beA1c8d54293FC1289672AFC6b); //kovan
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}
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/**
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* @dev get Aave Protocol Data Provider
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*/
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function getAaveDataProvider() internal pure returns (AaveDataProviderInterface) {
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return AaveDataProviderInterface(0x057835Ad21a177dbdd3090bB1CAE03EaCF78Fc6d); //mainnet
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// return AaveDataProviderInterface(0x744C1aaA95232EeF8A9994C4E0b3a89659D9AB79); //kovan
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}
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/**
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* @dev Return Weth address
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*/
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function getWethAddr() internal pure returns (address) {
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return 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; // Mainnet WETH Address
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// return 0xd0A1E359811322d97991E03f863a0C30C2cF029C; // Kovan WETH Address
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}
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/**
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* @dev get Referral Code
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*/
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function getReferralCode() internal pure returns (uint16) {
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return 3228;
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}
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function getIsColl(AaveDataProviderInterface aaveData, address token, address user) internal view returns (bool isCol) {
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(, , , , , , , , isCol) = aaveData.getUserReserveData(token, user);
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}
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function convertEthToWeth(bool isEth, TokenInterface token, uint amount) internal {
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if(isEth) token.deposit.value(amount)();
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}
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function convertWethToEth(bool isEth, TokenInterface token, uint amount) internal {
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if(isEth) {
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token.approve(address(token), amount);
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token.withdraw(amount);
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}
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}
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function getPaybackBalance(AaveDataProviderInterface aaveData, address token, uint rateMode) internal view returns (uint) {
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(, uint stableDebt, uint variableDebt, , , , , , ) = aaveData.getUserReserveData(token, address(this));
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return rateMode == 1 ? stableDebt : variableDebt;
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}
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function getCollateralBalance(AaveDataProviderInterface aaveData, address token) internal view returns (uint bal) {
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(bal, , , , , , , ,) = aaveData.getUserReserveData(token, address(this));
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}
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}
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contract BasicResolver is AaveHelpers {
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event LogDeposit(address indexed token, uint256 tokenAmt, uint256 getId, uint256 setId);
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event LogWithdraw(address indexed token, uint256 tokenAmt, uint256 getId, uint256 setId);
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event LogBorrow(address indexed token, uint256 tokenAmt, uint256 indexed rateMode, uint256 getId, uint256 setId);
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event LogPayback(address indexed token, uint256 tokenAmt, uint256 indexed rateMode, uint256 getId, uint256 setId);
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event LogEnableCollateral(address[] tokens);
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/**
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* @dev Deposit ETH/ERC20_Token.
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* @param token token address to deposit.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
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* @param amt token amount to deposit.
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* @param getId Get token amount at this ID from `InstaMemory` Contract.
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* @param setId Set token amount at this ID in `InstaMemory` Contract.
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*/
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function deposit(address token, uint amt, uint getId, uint setId) external payable {
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uint _amt = getUint(getId, amt);
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AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool());
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AaveDataProviderInterface aaveData = getAaveDataProvider();
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bool isEth = token == getEthAddr();
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address _token = isEth ? getWethAddr() : token;
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TokenInterface tokenContract = TokenInterface(_token);
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if (isEth) {
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_amt = _amt == uint(-1) ? address(this).balance : _amt;
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convertEthToWeth(isEth, tokenContract, _amt);
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} else {
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_amt = _amt == uint(-1) ? tokenContract.balanceOf(address(this)) : _amt;
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}
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tokenContract.approve(address(aave), _amt);
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aave.deposit(_token, _amt, address(this), getReferralCode());
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if (!getIsColl(aaveData, _token, address(this))) {
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aave.setUserUseReserveAsCollateral(_token, true);
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}
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setUint(setId, _amt);
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emit LogDeposit(token, _amt, getId, setId);
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}
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/**
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* @dev Withdraw ETH/ERC20_Token.
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* @param token token address to withdraw.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
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* @param amt token amount to withdraw.
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* @param getId Get token amount at this ID from `InstaMemory` Contract.
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* @param setId Set token amount at this ID in `InstaMemory` Contract.
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*/
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function withdraw(address token, uint amt, uint getId, uint setId) external payable {
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uint _amt = getUint(getId, amt);
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AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool());
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bool isEth = token == getEthAddr();
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address _token = isEth ? getWethAddr() : token;
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TokenInterface tokenContract = TokenInterface(_token);
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uint initialBal = tokenContract.balanceOf(address(this));
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aave.withdraw(_token, _amt, address(this));
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uint finalBal = tokenContract.balanceOf(address(this));
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_amt = sub(finalBal, initialBal);
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convertWethToEth(isEth, tokenContract, _amt);
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setUint(setId, _amt);
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emit LogWithdraw(token, _amt, getId, setId);
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}
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/**
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* @dev Borrow ETH/ERC20_Token.
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* @param token token address to borrow.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
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* @param amt token amount to borrow.
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* @param rateMode type of borrow debt.(For Stable: 1, Variable: 2)
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* @param getId Get token amount at this ID from `InstaMemory` Contract.
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* @param setId Set token amount at this ID in `InstaMemory` Contract.
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*/
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function borrow(address token, uint amt, uint rateMode, uint getId, uint setId) external payable {
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uint _amt = getUint(getId, amt);
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AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool());
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bool isEth = token == getEthAddr();
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address _token = isEth ? getWethAddr() : token;
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aave.borrow(_token, _amt, rateMode, getReferralCode(), address(this));
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convertWethToEth(isEth, TokenInterface(_token), _amt);
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setUint(setId, _amt);
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emit LogBorrow(token, _amt, rateMode, getId, setId);
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}
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/**
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* @dev Payback borrowed ETH/ERC20_Token.
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* @param token token address to payback.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
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* @param amt token amount to payback.
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* @param rateMode type of borrow debt.(For Stable: 1, Variable: 2)
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* @param getId Get token amount at this ID from `InstaMemory` Contract.
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* @param setId Set token amount at this ID in `InstaMemory` Contract.
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*/
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function payback(address token, uint amt, uint rateMode, uint getId, uint setId) external payable {
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uint _amt = getUint(getId, amt);
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AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool());
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AaveDataProviderInterface aaveData = getAaveDataProvider();
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bool isEth = token == getEthAddr();
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address _token = isEth ? getWethAddr() : token;
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TokenInterface tokenContract = TokenInterface(_token);
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_amt = _amt == uint(-1) ? getPaybackBalance(aaveData, _token, rateMode) : _amt;
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if (isEth) convertEthToWeth(isEth, tokenContract, _amt);
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tokenContract.approve(address(aave), _amt);
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aave.repay(_token, _amt, rateMode, address(this));
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setUint(setId, _amt);
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emit LogPayback(token, _amt, rateMode, getId, setId);
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}
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/**
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* @dev Enable collateral
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* @param tokens Array of tokens to enable collateral
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*/
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function enableCollateral(address[] calldata tokens) external {
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uint _length = tokens.length;
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require(_length > 0, "0-tokens-not-allowed");
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AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool());
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AaveDataProviderInterface aaveData = getAaveDataProvider();
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for (uint i = 0; i < _length; i++) {
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address token = tokens[i];
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if (getCollateralBalance(aaveData, token) > 0 && !getIsColl(aaveData, token, address(this))) {
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aave.setUserUseReserveAsCollateral(token, true);
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}
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}
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emit LogEnableCollateral(tokens);
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}
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}
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contract ConnectAaveV2 is BasicResolver {
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string public name = "AaveV2-v1.0";
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}
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