diff --git a/contracts/connectors/aave_v2.sol b/contracts/connectors/aave_v2.sol new file mode 100644 index 0000000..c4be801 --- /dev/null +++ b/contracts/connectors/aave_v2.sol @@ -0,0 +1,230 @@ +pragma solidity ^0.6.0; +pragma experimental ABIEncoderV2; + +// import files from common directory +import { TokenInterface , MemoryInterface, EventInterface} from "../common/interfaces.sol"; +import { Stores } from "../common/stores.sol"; +import { DSMath } from "../common/math.sol"; + +interface AaveInterface { + function deposit(address _asset, uint256 _amount, address _onBehalfOf, uint16 _referralCode) external; + function withdraw(address _asset, uint256 _amount, address _to) external; + function borrow( + address _asset, + uint256 _amount, + uint256 _interestRateMode, + uint16 _referralCode, + address _onBehalfOf + ) external; + function repay(address _asset, uint256 _amount, uint256 _rateMode, address _onBehalfOf) external; + function setUserUseReserveAsCollateral(address _asset, bool _useAsCollateral) external; + function getUserAccountData(address user) external view returns ( + uint256 totalCollateralETH, + uint256 totalDebtETH, + uint256 availableBorrowsETH, + uint256 currentLiquidationThreshold, + uint256 ltv, + uint256 healthFactor + ); +} + +interface AaveLendingPoolProviderInterface { + function getLendingPool() external view returns (address); +} + +// Aave Protocol Data Provider +interface AaveDataProviderInterface { + function getReserveTokensAddresses(address _asset) external view returns ( + address aTokenAddress, + address stableDebtTokenAddress, + address variableDebtTokenAddress + ); + function getUserReserveData(address _asset, address _user) external view returns ( + uint256 currentATokenBalance, + uint256 currentStableDebt, + uint256 currentVariableDebt, + uint256 principalStableDebt, + uint256 scaledVariableDebt, + uint256 stableBorrowRate, + uint256 liquidityRate, + uint40 stableRateLastUpdated, + bool usageAsCollateralEnabled + ); +} + +interface AaveAddressProviderRegistryInterface { + function getAddressesProvidersList() external view returns (address[] memory); +} + +interface ATokenInterface { + function scaledBalanceOf(address _user) external view returns (uint256); + function isTransferAllowed(address _user, uint256 _amount) external view returns (bool); + function balanceOf(address _user) external view returns(uint256); +} + +contract AaveHelpers is DSMath, Stores { + /** + * @dev get Aave Lending Pool Provider + */ + function getAaveProvider() internal pure returns (AaveLendingPoolProviderInterface) { + // return AaveLendingPoolProviderInterface(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); //mainnet + return AaveLendingPoolProviderInterface(0x652B2937Efd0B5beA1c8d54293FC1289672AFC6b); //kovan + } + + /** + * @dev get Aave Protocol Data Provider + */ + function getAaveDataProvider() internal pure returns (AaveDataProviderInterface) { + // return AaveProtocolDataProviderInterface(0x24a42fD28C976A61Df5D00D0599C34c4f90748c8); //mainnet + return AaveDataProviderInterface(0x744C1aaA95232EeF8A9994C4E0b3a89659D9AB79); //kovan + } + + /** + * @dev Return Weth address + */ + function getWethAddr() internal pure returns (address) { + return 0xd0A1E359811322d97991E03f863a0C30C2cF029C; // Kovan WETH Address + } + + /** + * @dev get Referral Code + */ + function getReferralCode() internal pure returns (uint16) { + return 0; + } + + function getIsColl(AaveDataProviderInterface aaveData, address token, address user) internal view returns (bool isCol) { + (, , , , , , , , isCol) = aaveData.getUserReserveData(token, user); + } + + function convertEthToWeth(bool isEth, TokenInterface token, uint amount) internal { + if(isEth) token.deposit.value(amount)(); + } + + function convertWethToEth(bool isEth, TokenInterface token, uint amount) internal { + if(isEth) { + token.approve(address(token), amount); + token.withdraw(amount); + } + } + + function getPaybackBalance(AaveDataProviderInterface aaveData, address token, uint rateMode) internal view returns (uint) { + (, uint stableDebt, uint variableDebt, , , , , , ) = aaveData.getUserReserveData(token, address(this)); + return rateMode == 1 ? stableDebt : variableDebt; + } +} + +contract BasicResolver is AaveHelpers { + event LogDeposit(address indexed token, uint256 tokenAmt, uint256 getId, uint256 setId); + event LogWithdraw(address indexed token, uint256 tokenAmt, uint256 getId, uint256 setId); + event LogBorrow(address indexed token, uint256 tokenAmt, uint256 indexed rateMode, uint256 getId, uint256 setId); + event LogPayback(address indexed token, uint256 tokenAmt, uint256 indexed rateMode, uint256 getId, uint256 setId); + + function deposit(address token, uint amt, uint getId, uint setId) external payable { + uint _amt = getUint(getId, amt); + + AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool()); + AaveDataProviderInterface aaveData = getAaveDataProvider(); + + bool isEth = token == getEthAddr(); + address _token = isEth ? getWethAddr() : token; + + TokenInterface tokenContract = TokenInterface(_token); + + if (isEth) { + _amt = _amt == uint(-1) ? address(this).balance : _amt; + convertEthToWeth(isEth, tokenContract, _amt); + } else { + _amt = _amt == uint(-1) ? tokenContract.balanceOf(address(this)) : _amt; + } + + tokenContract.approve(address(aave), _amt); + + aave.deposit(_token, _amt, address(this), getReferralCode()); + + if (!getIsColl(aaveData, _token, address(this))) { + aave.setUserUseReserveAsCollateral(_token, true); + } + + setUint(setId, _amt); + + emit LogDeposit(token, _amt, getId, setId); + // bytes32 _eventCode = keccak256("LogDeposit(address,uint256,uint256,uint256)"); + // bytes memory _eventParam = abi.encode(token, _amt, getId, setId); + // emitEvent(_eventCode, _eventParam); + } + + function withdraw(address token, uint amt, uint getId, uint setId) external { + uint _amt = getUint(getId, amt); + + AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool()); + bool isEth = token == getEthAddr(); + address _token = isEth ? getWethAddr() : token; + + TokenInterface tokenContract = TokenInterface(_token); + + uint initialBal = tokenContract.balanceOf(address(this)); + aave.withdraw(_token, _amt, address(this)); + uint finalBal = tokenContract.balanceOf(address(this)); + + convertWethToEth(isEth, tokenContract, finalBal); + + _amt = sub(finalBal, initialBal); + setUint(setId, _amt); + + emit LogWithdraw(token, _amt, getId, setId); + // bytes32 _eventCode = keccak256("LogWithdraw(address,uint256,uint256,uint256)"); + // bytes memory _eventParam = abi.encode(token, _amt, getId, setId); + // emitEvent(_eventCode, _eventParam); + } + + function borrow(address token, uint amt, uint rateMode, uint getId, uint setId) external { + uint _amt = getUint(getId, amt); + + AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool()); + + bool isEth = token == getEthAddr(); + address _token = isEth ? getWethAddr() : token; + + aave.borrow(_token, _amt, rateMode, getReferralCode(), address(this)); + convertWethToEth(isEth, TokenInterface(_token), _amt); + + setUint(setId, _amt); + + emit LogBorrow(token, _amt, rateMode, getId, setId); + // bytes32 _eventCode = keccak256("LogBorrow(address,uint256,uint256,uint256,uint256)"); + // bytes memory _eventParam = abi.encode(token, _amt, rateMode, getId, setId); + // emitEvent(_eventCode, _eventParam); + } + + function payback(address token, uint amt, uint rateMode, uint getId, uint setId) external payable { + uint _amt = getUint(getId, amt); + + AaveInterface aave = AaveInterface(getAaveProvider().getLendingPool()); + AaveDataProviderInterface aaveData = getAaveDataProvider(); + + bool isEth = token == getEthAddr(); + address _token = isEth ? getWethAddr() : token; + + TokenInterface tokenContract = TokenInterface(_token); + + _amt = _amt == uint(-1) ? getPaybackBalance(aaveData, _token, rateMode) : _amt; + + if (isEth) convertEthToWeth(isEth, tokenContract, _amt); + + tokenContract.approve(address(aave), _amt); + + aave.repay(_token, _amt, rateMode, address(this)); + + setUint(setId, _amt); + + emit LogPayback(token, _amt, rateMode, getId, setId); + // bytes32 _eventCode = keccak256("LogPayback(address,uint256,uint256,uint256,uint256)"); + // bytes memory _eventParam = abi.encode(token, _amt, rateMode, getId, setId); + // emitEvent(_eventCode, _eventParam); + } +} + +contract ConnectAaveV2 is BasicResolver { + string public name = "Aave-v2"; +} \ No newline at end of file diff --git a/package-lock.json b/package-lock.json index 10ff3aa..a0f28f7 100644 --- a/package-lock.json +++ b/package-lock.json @@ -1230,6 +1230,21 @@ "resolved": "https://registry.npmjs.org/scrypt-js/-/scrypt-js-2.0.4.tgz", "integrity": "sha512-4KsaGcPnuhtCZQCxFxN3GVYIhKFPTdLd8PLC552XwbMndtD0cjRFAhDuuydXQ0h08ZfPgzqe6EKHozpuH74iDw==" }, + "scrypt-shim": { + "version": "github:web3-js/scrypt-shim#aafdadda13e660e25e1c525d1f5b2443f5eb1ebb", + "from": "github:web3-js/scrypt-shim#aafdadda13e660e25e1c525d1f5b2443f5eb1ebb", + "requires": { + "scryptsy": "^2.1.0", + "semver": "^6.3.0" + }, + "dependencies": { + "semver": { + "version": "6.3.0", + "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz", + "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==" + } + } + }, "setimmediate": { "version": "1.0.4", "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.4.tgz", @@ -1427,7 +1442,6 @@ "eth-lib": "0.2.7", "ethereumjs-common": "^1.3.2", "ethereumjs-tx": "^2.1.1", - "scrypt-shim": "github:web3-js/scrypt-shim#aafdadda13e660e25e1c525d1f5b2443f5eb1ebb", "underscore": "1.9.1", "uuid": "3.3.2", "web3-core": "1.2.2", @@ -1531,8 +1545,20 @@ "integrity": "sha512-Wb1mrWTGMTXOpJkL0yGvL/WYLt8fUIXx8k/l52QB2IiKzvyd42dTWn4+j8IKXGSYYzOm7NMqv6nhA5VDk12VfA==", "requires": { "underscore": "1.9.1", - "web3-core-helpers": "1.2.2", - "websocket": "github:web3-js/WebSocket-Node#ef5ea2f41daf4a2113b80c9223df884b4d56c400" + "web3-core-helpers": "1.2.2" + }, + "dependencies": { + "websocket": { + "version": "github:web3-js/WebSocket-Node#ef5ea2f41daf4a2113b80c9223df884b4d56c400", + "from": "github:web3-js/WebSocket-Node#ef5ea2f41daf4a2113b80c9223df884b4d56c400", + "requires": { + "debug": "^2.2.0", + "es5-ext": "^0.10.50", + "nan": "^2.14.0", + "typedarray-to-buffer": "^3.1.5", + "yaeti": "^0.0.6" + } + } } }, "web3-shh": { @@ -1663,9 +1689,9 @@ "integrity": "sha512-kUVUvrqttndeprLoXjI5arWHeiP3uh4XODAKbG+ZaWHCVQeelxCbnXBeWxZ2BPHdXgH0xR9dU1b916JhDhbgAA==" }, "@studydefi/money-legos": { - "version": "2.3.5", - "resolved": "https://registry.npmjs.org/@studydefi/money-legos/-/money-legos-2.3.5.tgz", - "integrity": "sha512-Whfsw+Ka5PCX8u7za0DOnb3j7DqPQ0QW2SjtjrC4drP+MRpq6ANdxTLgAqYU2e5BZ3/DrDZ6MGTajMCPKXoxZw==", + "version": "2.4.1", + "resolved": "https://registry.npmjs.org/@studydefi/money-legos/-/money-legos-2.4.1.tgz", + "integrity": "sha512-60LErLtI+q0bCuwnhGQxK2pdsKPrwMYeQaIekXP2FOBUm6+k0qGl3Q5tly0eX2PkdC8ycxWeQSUvTIAHhmr4aQ==", "dev": true, "requires": { "@openzeppelin/contracts": "^2.5.0" @@ -4958,7 +4984,8 @@ "ansi-regex": { "version": "2.1.1", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "aproba": { "version": "1.2.0", @@ -4979,12 +5006,14 @@ "balanced-match": { "version": "1.0.0", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "brace-expansion": { "version": "1.1.11", "bundled": true, "dev": true, + "optional": true, "requires": { "balanced-match": "^1.0.0", "concat-map": "0.0.1" @@ -4999,17 +5028,20 @@ "code-point-at": { "version": "1.1.0", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "concat-map": { "version": "0.0.1", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "console-control-strings": { "version": "1.1.0", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "core-util-is": { "version": "1.0.2", @@ -5126,7 +5158,8 @@ "inherits": { "version": "2.0.4", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "ini": { "version": "1.3.5", @@ -5138,6 +5171,7 @@ "version": "1.0.0", "bundled": true, "dev": true, + "optional": true, "requires": { "number-is-nan": "^1.0.0" } @@ -5152,6 +5186,7 @@ "version": "3.0.4", "bundled": true, "dev": true, + "optional": true, "requires": { "brace-expansion": "^1.1.7" } @@ -5159,12 +5194,14 @@ "minimist": { "version": "1.2.5", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "minipass": { "version": "2.9.0", "bundled": true, "dev": true, + "optional": true, "requires": { "safe-buffer": "^5.1.2", "yallist": "^3.0.0" @@ -5183,6 +5220,7 @@ "version": "0.5.3", "bundled": true, "dev": true, + "optional": true, "requires": { "minimist": "^1.2.5" } @@ -5244,7 +5282,8 @@ "npm-normalize-package-bin": { "version": "1.0.1", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "npm-packlist": { "version": "1.4.8", @@ -5272,7 +5311,8 @@ "number-is-nan": { "version": "1.0.1", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "object-assign": { "version": "4.1.1", @@ -5284,6 +5324,7 @@ "version": "1.4.0", "bundled": true, "dev": true, + "optional": true, "requires": { "wrappy": "1" } @@ -5361,7 +5402,8 @@ "safe-buffer": { "version": "5.1.2", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "safer-buffer": { "version": "2.1.2", @@ -5397,6 +5439,7 @@ "version": "1.0.2", "bundled": true, "dev": true, + "optional": true, "requires": { "code-point-at": "^1.0.0", "is-fullwidth-code-point": "^1.0.0", @@ -5416,6 +5459,7 @@ "version": "3.0.1", "bundled": true, "dev": true, + "optional": true, "requires": { "ansi-regex": "^2.0.0" } @@ -5459,12 +5503,14 @@ "wrappy": { "version": "1.0.2", "bundled": true, - "dev": true + "dev": true, + "optional": true }, "yallist": { "version": "3.1.1", "bundled": true, - "dev": true + "dev": true, + "optional": true } } }, @@ -9365,21 +9411,6 @@ "resolved": "https://registry.npmjs.org/scrypt-js/-/scrypt-js-2.0.3.tgz", "integrity": "sha1-uwBAvgMEPamgEqLOqfyfhSz8h9Q=" }, - "scrypt-shim": { - "version": "github:web3-js/scrypt-shim#aafdadda13e660e25e1c525d1f5b2443f5eb1ebb", - "from": "github:web3-js/scrypt-shim", - "requires": { - "scryptsy": "^2.1.0", - "semver": "^6.3.0" - }, - "dependencies": { - "semver": { - "version": "6.3.0", - "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz", - "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==" - } - } - }, "scryptsy": { "version": "2.1.0", "resolved": "https://registry.npmjs.org/scryptsy/-/scryptsy-2.1.0.tgz", @@ -9840,7 +9871,7 @@ "integrity": "sha1-gewXhBRUkfLqqJVbMcBgSeB8Xn0=", "dev": true, "requires": { - "bignumber.js": "git+https://github.com/debris/bignumber.js.git#94d7146671b9719e00a09c29b01a691bc85048c2", + "bignumber.js": "bignumber.js@git+https://github.com/debris/bignumber.js.git#94d7146671b9719e00a09c29b01a691bc85048c2", "crypto-js": "^3.1.4", "utf8": "^2.1.1", "xhr2": "*", @@ -11657,8 +11688,7 @@ "integrity": "sha512-oqsQXzu+ejJACVHy864WwIyw+oB21nw/pI65/sD95Zi98+/HQzFfNcIFneF1NC4bVF3VNX4YHTNq2I2o97LAiA==", "requires": { "underscore": "1.9.1", - "web3-core-helpers": "1.2.1", - "websocket": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e" + "web3-core-helpers": "1.2.1" }, "dependencies": { "debug": { @@ -11676,7 +11706,7 @@ }, "websocket": { "version": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e", - "from": "github:web3-js/WebSocket-Node#polyfill/globalThis", + "from": "github:web3-js/WebSocket-Node#905deb4812572b344f5801f8c9ce8bb02799d82e", "requires": { "debug": "^2.2.0", "es5-ext": "^0.10.50",