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Add paraswap connector

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Mubaris NK 2021-04-21 18:04:43 +05:30
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11 changed files with 102 additions and 879 deletions
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10
contracts/connectors/aave/v2-amm/events.sol
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pragma solidity ^0.7.0;
contract Events {
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);
event LogEnableCollateral(address[] tokens);
event LogSwapRateMode(address indexed token, uint256 rateMode);
}

48
contracts/connectors/aave/v2-amm/helpers.sol
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pragma solidity ^0.7.0;
import { DSMath } from "../../../common/math.sol";
import { Basic } from "../../../common/basic.sol";
import { AaveLendingPoolProviderInterface, AaveDataProviderInterface } from "./interface.sol";
abstract contract Helpers is DSMath, Basic {
/**
* @dev Aave Lending Pool Provider
*/
AaveLendingPoolProviderInterface constant internal aaveProvider = AaveLendingPoolProviderInterface(0xAcc030EF66f9dFEAE9CbB0cd1B25654b82cFA8d5);
/**
* @dev Aave Protocol Data Provider
*/
AaveDataProviderInterface constant internal aaveData = AaveDataProviderInterface(0xc443AD9DDE3cecfB9dfC5736578f447aFE3590ba);
/**
* @dev Aave Referral Code
*/
uint16 constant internal referralCode = 3228;
/**
* @dev Checks if collateral is enabled for an asset
* @param token token address of the asset.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
*/
function getIsColl(address token) internal view returns (bool isCol) {
(, , , , , , , , isCol) = aaveData.getUserReserveData(token, address(this));
}
/**
* @dev Get total debt balance & fee for an asset
* @param token token address of the debt.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param rateMode Borrow rate mode (Stable = 1, Variable = 2)
*/
function getPaybackBalance(address token, uint rateMode) internal view returns (uint) {
(, uint stableDebt, uint variableDebt, , , , , , ) = aaveData.getUserReserveData(token, address(this));
return rateMode == 1 ? stableDebt : variableDebt;
}
/**
* @dev Get total collateral balance for an asset
* @param token token address of the collateral.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
*/
function getCollateralBalance(address token) internal view returns (uint bal) {
(bal, , , , , , , ,) = aaveData.getUserReserveData(token, address(this));
}
}

47
contracts/connectors/aave/v2-amm/interface.sol
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pragma solidity ^0.7.0;
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 swapBorrowRateMode(address _asset, uint256 _rateMode) external;
}
interface AaveLendingPoolProviderInterface {
function getLendingPool() external view returns (address);
}
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 balanceOf(address _user) external view returns(uint256);
}

205
contracts/connectors/aave/v2-amm/main.sol
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pragma solidity ^0.7.0;
import { TokenInterface } from "../../../common/interfaces.sol";
import { Stores } from "../../../common/stores.sol";
import { Helpers } from "./helpers.sol";
import { Events } from "./events.sol";
import { AaveInterface } from "./interface.sol";
abstract contract AaveResolver is Events, Helpers {
/**
* @dev Deposit ETH/ERC20_Token.
* @param token token address to deposit.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt token amount to deposit.
* @param getId Get token amount at this ID from `InstaMemory` Contract.
* @param setId Set token amount at this ID in `InstaMemory` Contract.
*/
function deposit(
address token,
uint256 amt,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getLendingPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : 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), referralCode);
if (!getIsColl(_token)) {
aave.setUserUseReserveAsCollateral(_token, true);
}
setUint(setId, _amt);
_eventName = "LogDeposit(address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, getId, setId);
}
/**
* @dev Withdraw ETH/ERC20_Token.
* @param token token address to withdraw.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt token amount to withdraw.
* @param getId Get token amount at this ID from `InstaMemory` Contract.
* @param setId Set token amount at this ID in `InstaMemory` Contract.
*/
function withdraw(
address token,
uint256 amt,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getLendingPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
TokenInterface tokenContract = TokenInterface(_token);
uint initialBal = tokenContract.balanceOf(address(this));
aave.withdraw(_token, _amt, address(this));
uint finalBal = tokenContract.balanceOf(address(this));
_amt = sub(finalBal, initialBal);
convertWethToEth(isEth, tokenContract, _amt);
setUint(setId, _amt);
_eventName = "LogWithdraw(address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, getId, setId);
}
/**
* @dev Borrow ETH/ERC20_Token.
* @param token token address to borrow.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt token amount to borrow.
* @param rateMode type of borrow debt.(For Stable: 1, Variable: 2)
* @param getId Get token amount at this ID from `InstaMemory` Contract.
* @param setId Set token amount at this ID in `InstaMemory` Contract.
*/
function borrow(
address token,
uint256 amt,
uint256 rateMode,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getLendingPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
aave.borrow(_token, _amt, rateMode, referralCode, address(this));
convertWethToEth(isEth, TokenInterface(_token), _amt);
setUint(setId, _amt);
_eventName = "LogBorrow(address,uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, rateMode, getId, setId);
}
/**
* @dev Payback borrowed ETH/ERC20_Token.
* @param token token address to payback.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt token amount to payback.
* @param rateMode type of borrow debt.(For Stable: 1, Variable: 2)
* @param getId Get token amount at this ID from `InstaMemory` Contract.
* @param setId Set token amount at this ID in `InstaMemory` Contract.
*/
function payback(
address token,
uint256 amt,
uint256 rateMode,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getLendingPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
TokenInterface tokenContract = TokenInterface(_token);
_amt = _amt == uint(-1) ? getPaybackBalance(_token, rateMode) : _amt;
if (isEth) convertEthToWeth(isEth, tokenContract, _amt);
tokenContract.approve(address(aave), _amt);
aave.repay(_token, _amt, rateMode, address(this));
setUint(setId, _amt);
_eventName = "LogPayback(address,uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, rateMode, getId, setId);
}
/**
* @dev Enable collateral
* @param tokens Array of tokens to enable collateral
*/
function enableCollateral(
address[] calldata tokens
) external payable returns (string memory _eventName, bytes memory _eventParam) {
uint _length = tokens.length;
require(_length > 0, "0-tokens-not-allowed");
AaveInterface aave = AaveInterface(aaveProvider.getLendingPool());
for (uint i = 0; i < _length; i++) {
address token = tokens[i];
if (getCollateralBalance(token) > 0 && !getIsColl(token)) {
aave.setUserUseReserveAsCollateral(token, true);
}
}
_eventName = "LogEnableCollateral(address[])";
_eventParam = abi.encode(tokens);
}
/**
* @dev Swap borrow rate mode
* @notice Swaps user borrow rate mode between variable and stable
* @param token The address of the token to swap borrow rate.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param rateMode Desired borrow rate mode. (Stable = 1, Variable = 2)
*/
function swapBorrowRateMode(
address token,
uint rateMode
) external payable returns (string memory _eventName, bytes memory _eventParam) {
AaveInterface aave = AaveInterface(aaveProvider.getLendingPool());
uint currentRateMode = rateMode == 1 ? 2 : 1;
if (getPaybackBalance(token, currentRateMode) > 0) {
aave.swapBorrowRateMode(token, rateMode);
}
_eventName = "LogSwapRateMode(address,uint256)";
_eventParam = abi.encode(token, rateMode);
}
}
contract ConnectV2AaveV2AMM is AaveResolver {
string constant public name = "AaveV2-AMM-v1";
}

62
contracts/connectors/cream/events.sol
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pragma solidity ^0.7.0;
contract Events {
event LogDeposit(
address indexed token,
address cToken,
uint256 tokenAmt,
uint256 getId,
uint256 setId
);
event LogWithdraw(
address indexed token,
address cToken,
uint256 tokenAmt,
uint256 getId,
uint256 setId
);
event LogBorrow(
address indexed token,
address cToken,
uint256 tokenAmt,
uint256 getId,
uint256 setId
);
event LogPayback(
address indexed token,
address cToken,
uint256 tokenAmt,
uint256 getId,
uint256 setId
);
event LogDepositCToken(
address indexed token,
address cToken,
uint256 tokenAmt,
uint256 cTokenAmt,
uint256 getId,
uint256 setId
);
event LogWithdrawCToken(
address indexed token,
address cToken,
uint256 tokenAmt,
uint256 cTokenAmt,
uint256 getId,
uint256 setId
);
event LogLiquidate(
address indexed borrower,
address indexed tokenToPay,
address indexed tokenInReturn,
uint256 tokenAmt,
uint256 getId,
uint256 setId
);
}

36
contracts/connectors/cream/helpers.sol
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pragma solidity ^0.7.0;
import { DSMath } from "../../common/math.sol";
import { Basic } from "../../common/basic.sol";
import { ComptrollerInterface, CreamMappingInterface } from "./interface.sol";
abstract contract Helpers is DSMath, Basic {
/**
* @dev Cream Comptroller
*/
ComptrollerInterface internal constant troller = ComptrollerInterface(0x3d5BC3c8d13dcB8bF317092d84783c2697AE9258);
/**
* @dev Cream Mapping
*/
// TODO: wait for the cream mapping contract address
CreamMappingInterface internal constant creamMapping = CreamMappingInterface();
/**
* @dev enter cream market
*/
function enterMarket(address cToken) internal {
address[] memory markets = troller.getAssetsIn(address(this));
bool isEntered = false;
for (uint i = 0; i < markets.length; i++) {
if (markets[i] == cToken) {
isEntered = true;
}
}
if (!isEntered) {
address[] memory toEnter = new address[](1);
toEnter[0] = cToken;
troller.enterMarkets(toEnter);
}
}
}

36
contracts/connectors/cream/interface.sol
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pragma solidity ^0.7.0;
interface CTokenInterface {
function mint(uint mintAmount) external returns (uint);
function redeem(uint redeemTokens) external returns (uint);
function borrow(uint borrowAmount) external returns (uint);
function repayBorrow(uint repayAmount) external returns (uint);
function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint); // For ERC20
function liquidateBorrow(address borrower, uint repayAmount, address cTokenCollateral) external returns (uint);
function borrowBalanceCurrent(address account) external returns (uint);
function redeemUnderlying(uint redeemAmount) external returns (uint);
function exchangeRateCurrent() external returns (uint);
function balanceOf(address owner) external view returns (uint256 balance);
}
interface CETHInterface {
function mint() external payable;
function repayBorrow() external payable;
function repayBorrowBehalf(address borrower) external payable;
function liquidateBorrow(address borrower, address cTokenCollateral) external payable;
}
interface ComptrollerInterface {
function enterMarkets(address[] calldata cTokens) external returns (uint[] memory);
function exitMarket(address cTokenAddress) external returns (uint);
function getAssetsIn(address account) external view returns (address[] memory);
function getAccountLiquidity(address account) external view returns (uint, uint, uint);
function claimComp(address) external;
}
interface CreamMappingInterface {
function cTokenMapping(string calldata tokenId) external view returns (address);
function getMapping(string calldata tokenId) external view returns (address, address);
}

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contracts/connectors/cream/main.sol
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pragma solidity ^0.7.0;
pragma experimental ABIEncoderV2;
import { TokenInterface } from "../../common/interfaces.sol";
import { Stores } from "../../common/stores.sol";
import { Helpers } from "./helpers.sol";
import { Events } from "./events.sol";
import { CETHInterface, CTokenInterface } from "./interface.sol";
abstract contract CreamResolver is Events, Helpers {
/**
* @dev Deposit ETH/ERC20_Token.
* @notice Deposit a token to Cream for lending / collaterization.
* @param token The address of the token to deposit. (For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param cToken The address of the corresponding cToken.
* @param amt The amount of the token to deposit. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens deposited.
*/
function depositRaw(
address token,
address cToken,
uint256 amt,
uint256 getId,
uint256 setId
) public payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
require(token != address(0) && cToken != address(0), "invalid token/ctoken address");
enterMarket(cToken);
if (token == ethAddr) {
_amt = _amt == uint(-1) ? address(this).balance : _amt;
CETHInterface(cToken).mint{value: _amt}();
} else {
TokenInterface tokenContract = TokenInterface(token);
_amt = _amt == uint(-1) ? tokenContract.balanceOf(address(this)) : _amt;
tokenContract.approve(cToken, _amt);
require(CTokenInterface(cToken).mint(_amt) == 0, "deposit-failed");
}
setUint(setId, _amt);
_eventName = "LogDeposit(address,address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, cToken, _amt, getId, setId);
}
/**
* @dev Deposit ETH/ERC20_Token using the Mapping.
* @notice Deposit a token to Cream for lending / collaterization.
* @param tokenId The token id of the token to deposit.(For eg: ETH-A)
* @param amt The amount of the token to deposit. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens deposited.
*/
function deposit(
string calldata tokenId,
uint256 amt,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
(address token, address cToken) = creamMapping.getMapping(tokenId);
(_eventName, _eventParam) = depositRaw(token, cToken, amt, getId, setId);
}
/**
* @dev Withdraw ETH/ERC20_Token.
* @notice Withdraw deposited token from Cream
* @param token The address of the token to withdraw. (For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param cToken The address of the corresponding cToken.
* @param amt The amount of the token to withdraw. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens withdrawn.
*/
function withdrawRaw(
address token,
address cToken,
uint256 amt,
uint256 getId,
uint256 setId
) public payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
require(token != address(0) && cToken != address(0), "invalid token/ctoken address");
CTokenInterface cTokenContract = CTokenInterface(cToken);
if (_amt == uint(-1)) {
TokenInterface tokenContract = TokenInterface(token);
uint initialBal = token == ethAddr ? address(this).balance : tokenContract.balanceOf(address(this));
require(cTokenContract.redeem(cTokenContract.balanceOf(address(this))) == 0, "full-withdraw-failed");
uint finalBal = token == ethAddr ? address(this).balance : tokenContract.balanceOf(address(this));
_amt = finalBal - initialBal;
} else {
require(cTokenContract.redeemUnderlying(_amt) == 0, "withdraw-failed");
}
setUint(setId, _amt);
_eventName = "LogWithdraw(address,address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, cToken, _amt, getId, setId);
}
/**
* @dev Withdraw ETH/ERC20_Token using the Mapping.
* @notice Withdraw deposited token from Cream
* @param tokenId The token id of the token to withdraw.(For eg: ETH-A)
* @param amt The amount of the token to withdraw. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens withdrawn.
*/
function withdraw(
string calldata tokenId,
uint256 amt,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
(address token, address cToken) = creamMapping.getMapping(tokenId);
(_eventName, _eventParam) = withdrawRaw(token, cToken, amt, getId, setId);
}
/**
* @dev Borrow ETH/ERC20_Token.
* @notice Borrow a token using Cream
* @param token The address of the token to borrow. (For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param cToken The address of the corresponding cToken.
* @param amt The amount of the token to borrow.
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens borrowed.
*/
function borrowRaw(
address token,
address cToken,
uint256 amt,
uint256 getId,
uint256 setId
) public payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
require(token != address(0) && cToken != address(0), "invalid token/ctoken address");
enterMarket(cToken);
require(CTokenInterface(cToken).borrow(_amt) == 0, "borrow-failed");
setUint(setId, _amt);
_eventName = "LogBorrow(address,address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, cToken, _amt, getId, setId);
}
/**
* @dev Borrow ETH/ERC20_Token using the Mapping.
* @notice Borrow a token using Cream
* @param tokenId The token id of the token to borrow.(For eg: DAI-A)
* @param amt The amount of the token to borrow.
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens borrowed.
*/
function borrow(
string calldata tokenId,
uint256 amt,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
(address token, address cToken) = creamMapping.getMapping(tokenId);
(_eventName, _eventParam) = borrowRaw(token, cToken, amt, getId, setId);
}
/**
* @dev Payback borrowed ETH/ERC20_Token.
* @notice Payback debt owed.
* @param token The address of the token to payback. (For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param cToken The address of the corresponding cToken.
* @param amt The amount of the token to payback. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens paid back.
*/
function paybackRaw(
address token,
address cToken,
uint256 amt,
uint256 getId,
uint256 setId
) public payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
require(token != address(0) && cToken != address(0), "invalid token/ctoken address");
CTokenInterface cTokenContract = CTokenInterface(cToken);
_amt = _amt == uint(-1) ? cTokenContract.borrowBalanceCurrent(address(this)) : _amt;
if (token == ethAddr) {
require(address(this).balance >= _amt, "not-enough-eth");
CETHInterface(cToken).repayBorrow{value: _amt}();
} else {
TokenInterface tokenContract = TokenInterface(token);
require(tokenContract.balanceOf(address(this)) >= _amt, "not-enough-token");
tokenContract.approve(cToken, _amt);
require(cTokenContract.repayBorrow(_amt) == 0, "repay-failed.");
}
setUint(setId, _amt);
_eventName = "LogPayback(address,address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, cToken, _amt, getId, setId);
}
/**
* @dev Payback borrowed ETH/ERC20_Token using the Mapping.
* @notice Payback debt owed.
* @param tokenId The token id of the token to payback.(For eg: COMP-A)
* @param amt The amount of the token to payback. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens paid back.
*/
function payback(
string calldata tokenId,
uint256 amt,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
(address token, address cToken) = creamMapping.getMapping(tokenId);
(_eventName, _eventParam) = paybackRaw(token, cToken, amt, getId, setId);
}
/**
* @dev Deposit ETH/ERC20_Token.
* @notice Same as depositRaw. The only difference is this method stores cToken amount in set ID.
* @param token The address of the token to deposit. (For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param cToken The address of the corresponding cToken.
* @param amt The amount of the token to deposit. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of cTokens received.
*/
function depositCTokenRaw(
address token,
address cToken,
uint256 amt,
uint256 getId,
uint256 setId
) public payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
require(token != address(0) && cToken != address(0), "invalid token/ctoken address");
enterMarket(cToken);
CTokenInterface ctokenContract = CTokenInterface(cToken);
uint initialBal = ctokenContract.balanceOf(address(this));
if (token == ethAddr) {
_amt = _amt == uint(-1) ? address(this).balance : _amt;
CETHInterface(cToken).mint{value: _amt}();
} else {
TokenInterface tokenContract = TokenInterface(token);
_amt = _amt == uint(-1) ? tokenContract.balanceOf(address(this)) : _amt;
tokenContract.approve(cToken, _amt);
require(ctokenContract.mint(_amt) == 0, "deposit-ctoken-failed.");
}
uint _cAmt;
{
uint finalBal = ctokenContract.balanceOf(address(this));
finalBal - initialBal;
setUint(setId, _cAmt);
}
_eventName = "LogDepositCToken(address,address,uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(token, cToken, _amt, _cAmt, getId, setId);
}
/**
* @dev Deposit ETH/ERC20_Token using the Mapping.
* @notice Same as deposit. The only difference is this method stores cToken amount in set ID.
* @param tokenId The token id of the token to depositCToken.(For eg: DAI-A)
* @param amt The amount of the token to deposit. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of cTokens received.
*/
function depositCToken(
string calldata tokenId,
uint256 amt,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
(address token, address cToken) = creamMapping.getMapping(tokenId);
(_eventName, _eventParam) = depositCTokenRaw(token, cToken, amt, getId, setId);
}
/**
* @dev Withdraw CETH/CERC20_Token using cToken Amt.
* @notice Same as withdrawRaw. The only difference is this method fetch cToken amount in get ID.
* @param token The address of the token to withdraw. (For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param cToken The address of the corresponding cToken.
* @param cTokenAmt The amount of cTokens to withdraw
* @param getId ID to retrieve cTokenAmt
* @param setId ID stores the amount of tokens withdrawn.
*/
function withdrawCTokenRaw(
address token,
address cToken,
uint cTokenAmt,
uint getId,
uint setId
) public payable returns (string memory _eventName, bytes memory _eventParam) {
uint _cAmt = getUint(getId, cTokenAmt);
require(token != address(0) && cToken != address(0), "invalid token/ctoken address");
CTokenInterface cTokenContract = CTokenInterface(cToken);
TokenInterface tokenContract = TokenInterface(token);
_cAmt = _cAmt == uint(-1) ? cTokenContract.balanceOf(address(this)) : _cAmt;
uint withdrawAmt;
{
uint initialBal = token != ethAddr ? tokenContract.balanceOf(address(this)) : address(this).balance;
require(cTokenContract.redeem(_cAmt) == 0, "redeem-failed");
uint finalBal = token != ethAddr ? tokenContract.balanceOf(address(this)) : address(this).balance;
withdrawAmt = sub(finalBal, initialBal);
}
setUint(setId, withdrawAmt);
_eventName = "LogWithdrawCToken(address,address,uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(token, cToken, withdrawAmt, _cAmt, getId, setId);
}
/**
* @dev Withdraw CETH/CERC20_Token using cToken Amt & the Mapping.
* @notice Same as withdraw. The only difference is this method fetch cToken amount in get ID.
* @param tokenId The token id of the token to withdraw CToken.(For eg: ETH-A)
* @param cTokenAmt The amount of cTokens to withdraw
* @param getId ID to retrieve cTokenAmt
* @param setId ID stores the amount of tokens withdrawn.
*/
function withdrawCToken(
string calldata tokenId,
uint cTokenAmt,
uint getId,
uint setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
(address token, address cToken) = creamMapping.getMapping(tokenId);
(_eventName, _eventParam) = withdrawCTokenRaw(token, cToken, cTokenAmt, getId, setId);
}
/**
* @dev Liquidate a position.
* @notice Liquidate a position.
* @param borrower Borrower's Address.
* @param tokenToPay The address of the token to pay for liquidation.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param cTokenPay Corresponding cToken address.
* @param tokenInReturn The address of the token to return for liquidation.
* @param cTokenColl Corresponding cToken address.
* @param amt The token amount to pay for liquidation.
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of paid for liquidation.
*/
function liquidateRaw(
address borrower,
address tokenToPay,
address cTokenPay,
address tokenInReturn,
address cTokenColl,
uint256 amt,
uint256 getId,
uint256 setId
) public payable returns (string memory _eventName, bytes memory _eventParam) {
uint _amt = getUint(getId, amt);
require(tokenToPay != address(0) && cTokenPay != address(0), "invalid token/ctoken address");
require(tokenInReturn != address(0) && cTokenColl != address(0), "invalid token/ctoken address");
CTokenInterface cTokenContract = CTokenInterface(cTokenPay);
{
(,, uint shortfall) = troller.getAccountLiquidity(borrower);
require(shortfall != 0, "account-cannot-be-liquidated");
_amt = _amt == uint(-1) ? cTokenContract.borrowBalanceCurrent(borrower) : _amt;
}
if (tokenToPay == ethAddr) {
require(address(this).balance >= _amt, "not-enough-eth");
CETHInterface(cTokenPay).liquidateBorrow{value: _amt}(borrower, cTokenColl);
} else {
TokenInterface tokenContract = TokenInterface(tokenToPay);
require(tokenContract.balanceOf(address(this)) >= _amt, "not-enough-token");
tokenContract.approve(cTokenPay, _amt);
require(cTokenContract.liquidateBorrow(borrower, _amt, cTokenColl) == 0, "liquidate-failed");
}
setUint(setId, _amt);
_eventName = "LogLiquidate(address,address,address,uint256,uint256,uint256)";
_eventParam = abi.encode(
address(this),
tokenToPay,
tokenInReturn,
_amt,
getId,
setId
);
}
/**
* @dev Liquidate a position using the mapping.
* @notice Liquidate a position using the mapping.
* @param borrower Borrower's Address.
* @param tokenIdToPay token id of the token to pay for liquidation.(For eg: ETH-A)
* @param tokenIdInReturn token id of the token to return for liquidation.(For eg: USDC-A)
* @param amt token amount to pay for liquidation.
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of paid for liquidation.
*/
function liquidate(
address borrower,
string calldata tokenIdToPay,
string calldata tokenIdInReturn,
uint256 amt,
uint256 getId,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
(address tokenToPay, address cTokenToPay) = creamMapping.getMapping(tokenIdToPay);
(address tokenInReturn, address cTokenColl) = creamMapping.getMapping(tokenIdInReturn);
(_eventName, _eventParam) = liquidateRaw(
borrower,
tokenToPay,
cTokenToPay,
tokenInReturn,
cTokenColl,
amt,
getId,
setId
);
}
}
contract ConnectV2Cream is CreamResolver {
string public name = "Cream-v1";
}

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contracts/polygon/connectors/paraswap/events.sol Normal file
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pragma solidity ^0.7.0;
contract Events {
event LogSwap(
address buyToken,
address sellToken,
uint256 buyAmt,
uint256 sellAmt,
uint256 setId
);
}

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contracts/polygon/connectors/paraswap/helpers.sol Normal file
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pragma solidity ^0.7.0;
import { DSMath } from "../../common/math.sol";
import { Basic } from "../../common/basic.sol";
import { TokenInterface } from "../../common/interfaces.sol";
abstract contract Helpers is DSMath, Basic {
struct SwapData {
TokenInterface sellToken;
TokenInterface buyToken;
uint256 _sellAmt;
uint256 _buyAmt;
uint256 unitAmt;
bytes callData;
}
address internal constant paraswap = 0x90249ed4d69D70E709fFCd8beE2c5A566f65dADE;
function _swapHelper(SwapData memory swapData, uint256 wmaticAmt) internal returns (uint256 buyAmt) {
TokenInterface buyToken = swapData.buyToken;
(uint256 _buyDec, uint256 _sellDec) = getTokensDec(buyToken, swapData.sellToken);
uint256 _sellAmt18 = convertTo18(_sellDec, swapData._sellAmt);
uint256 _slippageAmt = convert18ToDec(_buyDec, wmul(swapData.unitAmt, _sellAmt18));
uint256 initalBal = getTokenBal(buyToken);
(bool success, ) = paraswap.call{value: wmaticAmt}(swapData.callData);
if (!success) revert("paraswap-failed");
uint256 finalBal = getTokenBal(buyToken);
buyAmt = sub(finalBal, initalBal);
require(_slippageAmt <= buyAmt, "Too much slippage");
}
function _swap(SwapData memory swapData, uint256 setId) internal returns (SwapData memory) {
TokenInterface _sellAddr = swapData.sellToken;
uint256 maticAmt;
if (address(_sellAddr) == maticAddr) {
maticAmt = swapData._sellAmt;
} else {
TokenInterface(_sellAddr).approve(paraswap, swapData._sellAmt);
}
swapData._buyAmt = _swapHelper(swapData, maticAmt);
setUint(setId, swapData._buyAmt);
return swapData;
}
}

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contracts/polygon/connectors/paraswap/main.sol Normal file
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pragma solidity ^0.7.0;
import { TokenInterface } from "../../common/interfaces.sol";
import { Stores } from "../../common/stores.sol";
import { Helpers } from "./helpers.sol";
abstract contract ParaswapResolver is Helpers {
function swap(
address buyAddr,
address sellAddr,
uint256 sellAmt,
uint256 unitAmt,
bytes calldata callData,
uint256 setId
) external payable returns (string memory _eventName, bytes memory _eventParam) {
Helpers.SwapData memory swapData = Helpers.SwapData({
buyToken: TokenInterface(buyAddr),
sellToken: TokenInterface(sellAddr),
unitAmt: unitAmt,
callData: callData,
_sellAmt: sellAmt,
_buyAmt: 0
});
swapData = _swap(swapData, setId);
_eventName = "LogSwap(address,address,uint256,uint256,uint256)";
_eventParam = abi.encode(
address(swapData.buyToken),
address(swapData.sellToken),
swapData._buyAmt,
swapData._sellAmt,
setId
);
}
}