pragma solidity 0.5.17; import "./QiToken.sol"; import "./ErrorReporter.sol"; import "./PriceOracle.sol"; import "./ComptrollerInterface.sol"; import "./ComptrollerStorage.sol"; import "./Unitroller.sol"; import "./Governance/Qi.sol"; /** * @title Benqi's Comptroller Contract * @author Benqi */ contract Comptroller is ComptrollerVXStorage, ComptrollerInterface, ComptrollerErrorReporter, ExponentialNoError { /// @notice Emitted when an admin supports a market event MarketListed(QiToken qiToken); /// @notice Emitted when an account enters a market event MarketEntered(QiToken qiToken, address account); /// @notice Emitted when an account exits a market event MarketExited(QiToken qiToken, address account); /// @notice Emitted when close factor is changed by admin event NewCloseFactor(uint oldCloseFactorMantissa, uint newCloseFactorMantissa); /// @notice Emitted when a collateral factor is changed by admin event NewCollateralFactor(QiToken qiToken, uint oldCollateralFactorMantissa, uint newCollateralFactorMantissa); /// @notice Emitted when liquidation incentive is changed by admin event NewLiquidationIncentive(uint oldLiquidationIncentiveMantissa, uint newLiquidationIncentiveMantissa); /// @notice Emitted when price oracle is changed event NewPriceOracle(PriceOracle oldPriceOracle, PriceOracle newPriceOracle); /// @notice Emitted when pause guardian is changed event NewPauseGuardian(address oldPauseGuardian, address newPauseGuardian); /// @notice Emitted when an action is paused globally event ActionPaused(string action, bool pauseState); /// @notice Emitted when an action is paused on a market event ActionPaused(QiToken qiToken, string action, bool pauseState); /// @notice Emitted when supplier reward speed is updated event SupplyRewardSpeedUpdated(uint8 rewardToken, QiToken indexed qiToken, uint newSupplyRewardSpeed); /// @notice Emitted when borrower reward speed is updated event BorrowRewardSpeedUpdated(uint8 rewardToken, QiToken indexed qiToken, uint newBorrowRewardSpeed); /// @notice Emitted when a new BENQI speed is set for a contributor event ContributorQiSpeedUpdated(address indexed contributor, uint newSpeed); /// @notice Emitted when BENQI or AVAX is distributed to a borrower event DistributedBorrowerReward(uint8 indexed tokenType, QiToken indexed qiToken, address indexed borrower, uint qiDelta, uint qiBorrowIndex); /// @notice Emitted when BENQI or AVAX is distributed to a supplier event DistributedSupplierReward(uint8 indexed tokenType, QiToken indexed qiToken, address indexed borrower, uint qiDelta, uint qiBorrowIndex); /// @notice Emitted when borrow cap for a qiToken is changed event NewBorrowCap(QiToken indexed qiToken, uint newBorrowCap); /// @notice Emitted when borrow cap guardian is changed event NewBorrowCapGuardian(address oldBorrowCapGuardian, address newBorrowCapGuardian); /// @notice Emitted when BENQI is granted by admin event QiGranted(address recipient, uint amount); /// @notice The initial BENQI and AVAX index for a market uint224 public constant initialIndexConstant = 1e36; // closeFactorMantissa must be strictly greater than this value uint internal constant closeFactorMinMantissa = 0.05e18; // 0.05 // closeFactorMantissa must not exceed this value uint internal constant closeFactorMaxMantissa = 0.9e18; // 0.9 // No collateralFactorMantissa may exceed this value uint internal constant collateralFactorMaxMantissa = 0.9e18; // 0.9 // reward token type to show BENQI or AVAX uint8 public constant rewardQi = 0; uint8 public constant rewardAvax = 1; constructor() public { admin = msg.sender; } /*** Assets You Are In ***/ /** * @notice Returns the assets an account has entered * @param account The address of the account to pull assets for * @return A dynamic list with the assets the account has entered */ function getAssetsIn(address account) external view returns (QiToken[] memory) { QiToken[] memory assetsIn = accountAssets[account]; return assetsIn; } /** * @notice Returns whether the given account is entered in the given asset * @param account The address of the account to check * @param qiToken The qiToken to check * @return True if the account is in the asset, otherwise false. */ function checkMembership(address account, QiToken qiToken) external view returns (bool) { return markets[address(qiToken)].accountMembership[account]; } /** * @notice Add assets to be included in account liquidity calculation * @param qiTokens The list of addresses of the qiToken markets to be enabled * @return Success indicator for whether each corresponding market was entered */ function enterMarkets(address[] memory qiTokens) public returns (uint[] memory) { uint len = qiTokens.length; uint[] memory results = new uint[](len); for (uint i = 0; i < len; i++) { QiToken qiToken = QiToken(qiTokens[i]); results[i] = uint(addToMarketInternal(qiToken, msg.sender)); } return results; } /** * @notice Add the market to the borrower's "assets in" for liquidity calculations * @param qiToken The market to enter * @param borrower The address of the account to modify * @return Success indicator for whether the market was entered */ function addToMarketInternal(QiToken qiToken, address borrower) internal returns (Error) { Market storage marketToJoin = markets[address(qiToken)]; if (!marketToJoin.isListed) { // market is not listed, cannot join return Error.MARKET_NOT_LISTED; } if (marketToJoin.accountMembership[borrower] == true) { // already joined return Error.NO_ERROR; } // survived the gauntlet, add to list // NOTE: we store these somewhat redundantly as a significant optimization // this avoids having to iterate through the list for the most common use cases // that is, only when we need to perform liquidity checks // and not whenever we want to check if an account is in a particular market marketToJoin.accountMembership[borrower] = true; accountAssets[borrower].push(qiToken); emit MarketEntered(qiToken, borrower); return Error.NO_ERROR; } /** * @notice Removes asset from sender's account liquidity calculation * @dev Sender must not have an outstanding borrow balance in the asset, * or be providing necessary collateral for an outstanding borrow. * @param qiTokenAddress The address of the asset to be removed * @return Whether or not the account successfully exited the market */ function exitMarket(address qiTokenAddress) external returns (uint) { QiToken qiToken = QiToken(qiTokenAddress); /* Get sender tokensHeld and amountOwed underlying from the qiToken */ (uint oErr, uint tokensHeld, uint amountOwed, ) = qiToken.getAccountSnapshot(msg.sender); require(oErr == 0, "exitMarket: getAccountSnapshot failed"); // semi-opaque error code /* Fail if the sender has a borrow balance */ if (amountOwed != 0) { return fail(Error.NONZERO_BORROW_BALANCE, FailureInfo.EXIT_MARKET_BALANCE_OWED); } /* Fail if the sender is not permitted to redeem all of their tokens */ uint allowed = redeemAllowedInternal(qiTokenAddress, msg.sender, tokensHeld); if (allowed != 0) { return failOpaque(Error.REJECTION, FailureInfo.EXIT_MARKET_REJECTION, allowed); } Market storage marketToExit = markets[address(qiToken)]; /* Return true if the sender is not already ‘in’ the market */ if (!marketToExit.accountMembership[msg.sender]) { return uint(Error.NO_ERROR); } /* Set qiToken account membership to false */ delete marketToExit.accountMembership[msg.sender]; /* Delete qiToken from the account’s list of assets */ // load into memory for faster iteration QiToken[] memory userAssetList = accountAssets[msg.sender]; uint len = userAssetList.length; uint assetIndex = len; for (uint i = 0; i < len; i++) { if (userAssetList[i] == qiToken) { assetIndex = i; break; } } // We *must* have found the asset in the list or our redundant data structure is broken assert(assetIndex < len); // copy last item in list to location of item to be removed, reduce length by 1 QiToken[] storage storedList = accountAssets[msg.sender]; storedList[assetIndex] = storedList[storedList.length - 1]; storedList.length--; emit MarketExited(qiToken, msg.sender); return uint(Error.NO_ERROR); } /*** Policy Hooks ***/ /** * @notice Checks if the account should be allowed to mint tokens in the given market * @param qiToken The market to verify the mint against * @param minter The account which would get the minted tokens * @param mintAmount The amount of underlying being supplied to the market in exchange for tokens * @return 0 if the mint is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function mintAllowed(address qiToken, address minter, uint mintAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!mintGuardianPaused[qiToken], "mint is paused"); // Shh - currently unused mintAmount; if (!markets[qiToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving updateAndDistributeSupplierRewardsForToken(qiToken, minter); return uint(Error.NO_ERROR); } /** * @notice Validates mint and reverts on rejection. May emit logs. * @param qiToken Asset being minted * @param minter The address minting the tokens * @param actualMintAmount The amount of the underlying asset being minted * @param mintTokens The number of tokens being minted */ function mintVerify(address qiToken, address minter, uint actualMintAmount, uint mintTokens) external { // Shh - currently unused qiToken; minter; actualMintAmount; mintTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to redeem tokens in the given market * @param qiToken The market to verify the redeem against * @param redeemer The account which would redeem the tokens * @param redeemTokens The number of qiTokens to exchange for the underlying asset in the market * @return 0 if the redeem is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function redeemAllowed(address qiToken, address redeemer, uint redeemTokens) external returns (uint) { uint allowed = redeemAllowedInternal(qiToken, redeemer, redeemTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateAndDistributeSupplierRewardsForToken(qiToken, redeemer); return uint(Error.NO_ERROR); } function redeemAllowedInternal(address qiToken, address redeemer, uint redeemTokens) internal view returns (uint) { if (!markets[qiToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* If the redeemer is not 'in' the market, then we can bypass the liquidity check */ if (!markets[qiToken].accountMembership[redeemer]) { return uint(Error.NO_ERROR); } /* Otherwise, perform a hypothetical liquidity check to guard against shortfall */ (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(redeemer, QiToken(qiToken), redeemTokens, 0); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall > 0) { return uint(Error.INSUFFICIENT_LIQUIDITY); } return uint(Error.NO_ERROR); } /** * @notice Validates redeem and reverts on rejection. May emit logs. * @param qiToken Asset being redeemed * @param redeemer The address redeeming the tokens * @param redeemAmount The amount of the underlying asset being redeemed * @param redeemTokens The number of tokens being redeemed */ function redeemVerify(address qiToken, address redeemer, uint redeemAmount, uint redeemTokens) external { // Shh - currently unused qiToken; redeemer; // Require tokens is zero or amount is also zero if (redeemTokens == 0 && redeemAmount > 0) { revert("redeemTokens zero"); } } /** * @notice Checks if the account should be allowed to borrow the underlying asset of the given market * @param qiToken The market to verify the borrow against * @param borrower The account which would borrow the asset * @param borrowAmount The amount of underlying the account would borrow * @return 0 if the borrow is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function borrowAllowed(address qiToken, address borrower, uint borrowAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!borrowGuardianPaused[qiToken], "borrow is paused"); if (!markets[qiToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (!markets[qiToken].accountMembership[borrower]) { // only qiTokens may call borrowAllowed if borrower not in market require(msg.sender == qiToken, "sender must be qiToken"); // attempt to add borrower to the market Error err = addToMarketInternal(QiToken(msg.sender), borrower); if (err != Error.NO_ERROR) { return uint(err); } // it should be impossible to break the important invariant assert(markets[qiToken].accountMembership[borrower]); } if (oracle.getUnderlyingPrice(QiToken(qiToken)) == 0) { return uint(Error.PRICE_ERROR); } uint borrowCap = borrowCaps[qiToken]; // Borrow cap of 0 corresponds to unlimited borrowing if (borrowCap != 0) { uint totalBorrows = QiToken(qiToken).totalBorrows(); uint nextTotalBorrows = add_(totalBorrows, borrowAmount); require(nextTotalBorrows < borrowCap, "market borrow cap reached"); } (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(borrower, QiToken(qiToken), 0, borrowAmount); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall > 0) { return uint(Error.INSUFFICIENT_LIQUIDITY); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa: QiToken(qiToken).borrowIndex()}); updateAndDistributeBorrowerRewardsForToken(qiToken, borrower, borrowIndex); return uint(Error.NO_ERROR); } /** * @notice Validates borrow and reverts on rejection. May emit logs. * @param qiToken Asset whose underlying is being borrowed * @param borrower The address borrowing the underlying * @param borrowAmount The amount of the underlying asset requested to borrow */ function borrowVerify(address qiToken, address borrower, uint borrowAmount) external { // Shh - currently unused qiToken; borrower; borrowAmount; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to repay a borrow in the given market * @param qiToken The market to verify the repay against * @param payer The account which would repay the asset * @param borrower The account which would borrowed the asset * @param repayAmount The amount of the underlying asset the account would repay * @return 0 if the repay is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function repayBorrowAllowed( address qiToken, address payer, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused payer; borrower; repayAmount; if (!markets[qiToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa: QiToken(qiToken).borrowIndex()}); updateAndDistributeBorrowerRewardsForToken(qiToken, borrower, borrowIndex); return uint(Error.NO_ERROR); } /** * @notice Validates repayBorrow and reverts on rejection. May emit logs. * @param qiToken Asset being repaid * @param payer The address repaying the borrow * @param borrower The address of the borrower * @param actualRepayAmount The amount of underlying being repaid */ function repayBorrowVerify( address qiToken, address payer, address borrower, uint actualRepayAmount, uint borrowerIndex) external { // Shh - currently unused qiToken; payer; borrower; actualRepayAmount; borrowerIndex; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the liquidation should be allowed to occur * @param qiTokenBorrowed Asset which was borrowed by the borrower * @param qiTokenCollateral Asset which was used as collateral and will be seized * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param repayAmount The amount of underlying being repaid */ function liquidateBorrowAllowed( address qiTokenBorrowed, address qiTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused liquidator; if (!markets[qiTokenBorrowed].isListed || !markets[qiTokenCollateral].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* The borrower must have shortfall in order to be liquidatable */ (Error err, , uint shortfall) = getAccountLiquidityInternal(borrower); if (err != Error.NO_ERROR) { return uint(err); } if (shortfall == 0) { return uint(Error.INSUFFICIENT_SHORTFALL); } /* The liquidator may not repay more than what is allowed by the closeFactor */ uint borrowBalance = QiToken(qiTokenBorrowed).borrowBalanceStored(borrower); uint maxClose = mul_ScalarTruncate(Exp({mantissa: closeFactorMantissa}), borrowBalance); if (repayAmount > maxClose) { return uint(Error.TOO_MUCH_REPAY); } return uint(Error.NO_ERROR); } /** * @notice Validates liquidateBorrow and reverts on rejection. May emit logs. * @param qiTokenBorrowed Asset which was borrowed by the borrower * @param qiTokenCollateral Asset which was used as collateral and will be seized * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param actualRepayAmount The amount of underlying being repaid */ function liquidateBorrowVerify( address qiTokenBorrowed, address qiTokenCollateral, address liquidator, address borrower, uint actualRepayAmount, uint seizeTokens) external { // Shh - currently unused qiTokenBorrowed; qiTokenCollateral; liquidator; borrower; actualRepayAmount; seizeTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the seizing of assets should be allowed to occur * @param qiTokenCollateral Asset which was used as collateral and will be seized * @param qiTokenBorrowed Asset which was borrowed by the borrower * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param seizeTokens The number of collateral tokens to seize */ function seizeAllowed( address qiTokenCollateral, address qiTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!seizeGuardianPaused, "seize is paused"); // Shh - currently unused seizeTokens; if (!markets[qiTokenCollateral].isListed || !markets[qiTokenBorrowed].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (QiToken(qiTokenCollateral).comptroller() != QiToken(qiTokenBorrowed).comptroller()) { return uint(Error.COMPTROLLER_MISMATCH); } // Keep the flywheel moving updateAndDistributeSupplierRewardsForToken(qiTokenCollateral, borrower); updateAndDistributeSupplierRewardsForToken(qiTokenCollateral, liquidator); return uint(Error.NO_ERROR); } /** * @notice Validates seize and reverts on rejection. May emit logs. * @param qiTokenCollateral Asset which was used as collateral and will be seized * @param qiTokenBorrowed Asset which was borrowed by the borrower * @param liquidator The address repaying the borrow and seizing the collateral * @param borrower The address of the borrower * @param seizeTokens The number of collateral tokens to seize */ function seizeVerify( address qiTokenCollateral, address qiTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external { // Shh - currently unused qiTokenCollateral; qiTokenBorrowed; liquidator; borrower; seizeTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /** * @notice Checks if the account should be allowed to transfer tokens in the given market * @param qiToken The market to verify the transfer against * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of qiTokens to transfer * @return 0 if the transfer is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function transferAllowed(address qiToken, address src, address dst, uint transferTokens) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!transferGuardianPaused, "transfer is paused"); // Currently the only consideration is whether or not // the src is allowed to redeem this many tokens uint allowed = redeemAllowedInternal(qiToken, src, transferTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateAndDistributeSupplierRewardsForToken(qiToken, src); updateAndDistributeSupplierRewardsForToken(qiToken, dst); return uint(Error.NO_ERROR); } /** * @notice Validates transfer and reverts on rejection. May emit logs. * @param qiToken Asset being transferred * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of qiTokens to transfer */ function transferVerify(address qiToken, address src, address dst, uint transferTokens) external { // Shh - currently unused qiToken; src; dst; transferTokens; // Shh - we don't ever want this hook to be marked pure if (false) { maxAssets = maxAssets; } } /*** Liquidity/Liquidation Calculations ***/ /** * @dev Local vars for avoiding stack-depth limits in calculating account liquidity. * Note that `qiTokenBalance` is the number of qiTokens the account owns in the market, * whereas `borrowBalance` is the amount of underlying that the account has borrowed. */ struct AccountLiquidityLocalVars { uint sumCollateral; uint sumBorrowPlusEffects; uint qiTokenBalance; uint borrowBalance; uint exchangeRateMantissa; uint oraclePriceMantissa; Exp collateralFactor; Exp exchangeRate; Exp oraclePrice; Exp tokensToDenom; } /** * @notice Determine the current account liquidity wrt collateral requirements * @return (possible error code (semi-opaque), account liquidity in excess of collateral requirements, * account shortfall below collateral requirements) */ function getAccountLiquidity(address account) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, QiToken(0), 0, 0); return (uint(err), liquidity, shortfall); } /** * @notice Determine the current account liquidity wrt collateral requirements * @return (possible error code, account liquidity in excess of collateral requirements, * account shortfall below collateral requirements) */ function getAccountLiquidityInternal(address account) internal view returns (Error, uint, uint) { return getHypotheticalAccountLiquidityInternal(account, QiToken(0), 0, 0); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param qiTokenModify The market to hypothetically redeem/borrow in * @param account The account to determine liquidity for * @param redeemTokens The number of tokens to hypothetically redeem * @param borrowAmount The amount of underlying to hypothetically borrow * @return (possible error code (semi-opaque), hypothetical account liquidity in excess of collateral requirements, * hypothetical account shortfall below collateral requirements) */ function getHypotheticalAccountLiquidity( address account, address qiTokenModify, uint redeemTokens, uint borrowAmount) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, QiToken(qiTokenModify), redeemTokens, borrowAmount); return (uint(err), liquidity, shortfall); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param qiTokenModify The market to hypothetically redeem/borrow in * @param account The account to determine liquidity for * @param redeemTokens The number of tokens to hypothetically redeem * @param borrowAmount The amount of underlying to hypothetically borrow * @dev Note that we calculate the exchangeRateStored for each collateral qiToken using stored data, * without calculating accumulated interest. * @return (possible error code, hypothetical account liquidity in excess of collateral requirements, * hypothetical account shortfall below collateral requirements) */ function getHypotheticalAccountLiquidityInternal( address account, QiToken qiTokenModify, uint redeemTokens, uint borrowAmount) internal view returns (Error, uint, uint) { AccountLiquidityLocalVars memory vars; // Holds all our calculation results uint oErr; // For each asset the account is in QiToken[] memory assets = accountAssets[account]; for (uint i = 0; i < assets.length; i++) { QiToken asset = assets[i]; // Read the balances and exchange rate from the qiToken (oErr, vars.qiTokenBalance, vars.borrowBalance, vars.exchangeRateMantissa) = asset.getAccountSnapshot(account); if (oErr != 0) { // semi-opaque error code, we assume NO_ERROR == 0 is invariant between upgrades return (Error.SNAPSHOT_ERROR, 0, 0); } vars.collateralFactor = Exp({mantissa: markets[address(asset)].collateralFactorMantissa}); vars.exchangeRate = Exp({mantissa: vars.exchangeRateMantissa}); // Get the normalized price of the asset vars.oraclePriceMantissa = oracle.getUnderlyingPrice(asset); if (vars.oraclePriceMantissa == 0) { return (Error.PRICE_ERROR, 0, 0); } vars.oraclePrice = Exp({mantissa: vars.oraclePriceMantissa}); // Pre-compute a conversion factor from tokens -> avax (normalized price value) vars.tokensToDenom = mul_(mul_(vars.collateralFactor, vars.exchangeRate), vars.oraclePrice); // sumCollateral += tokensToDenom * qiTokenBalance vars.sumCollateral = mul_ScalarTruncateAddUInt(vars.tokensToDenom, vars.qiTokenBalance, vars.sumCollateral); // sumBorrowPlusEffects += oraclePrice * borrowBalance vars.sumBorrowPlusEffects = mul_ScalarTruncateAddUInt(vars.oraclePrice, vars.borrowBalance, vars.sumBorrowPlusEffects); // Calculate effects of interacting with qiTokenModify if (asset == qiTokenModify) { // redeem effect // sumBorrowPlusEffects += tokensToDenom * redeemTokens vars.sumBorrowPlusEffects = mul_ScalarTruncateAddUInt(vars.tokensToDenom, redeemTokens, vars.sumBorrowPlusEffects); // borrow effect // sumBorrowPlusEffects += oraclePrice * borrowAmount vars.sumBorrowPlusEffects = mul_ScalarTruncateAddUInt(vars.oraclePrice, borrowAmount, vars.sumBorrowPlusEffects); } } // These are safe, as the underflow condition is checked first if (vars.sumCollateral > vars.sumBorrowPlusEffects) { return (Error.NO_ERROR, vars.sumCollateral - vars.sumBorrowPlusEffects, 0); } else { return (Error.NO_ERROR, 0, vars.sumBorrowPlusEffects - vars.sumCollateral); } } /** * @notice Calculate number of tokens of collateral asset to seize given an underlying amount * @dev Used in liquidation (called in qiToken.liquidateBorrowFresh) * @param qiTokenBorrowed The address of the borrowed qiToken * @param qiTokenCollateral The address of the collateral qiToken * @param actualRepayAmount The amount of qiTokenBorrowed underlying to convert into qiTokenCollateral tokens * @return (errorCode, number of qiTokenCollateral tokens to be seized in a liquidation) */ function liquidateCalculateSeizeTokens(address qiTokenBorrowed, address qiTokenCollateral, uint actualRepayAmount) external view returns (uint, uint) { /* Read oracle prices for borrowed and collateral markets */ uint priceBorrowedMantissa = oracle.getUnderlyingPrice(QiToken(qiTokenBorrowed)); uint priceCollateralMantissa = oracle.getUnderlyingPrice(QiToken(qiTokenCollateral)); if (priceBorrowedMantissa == 0 || priceCollateralMantissa == 0) { return (uint(Error.PRICE_ERROR), 0); } /* * Get the exchange rate and calculate the number of collateral tokens to seize: * seizeAmount = actualRepayAmount * liquidationIncentive * priceBorrowed / priceCollateral * seizeTokens = seizeAmount / exchangeRate * = actualRepayAmount * (liquidationIncentive * priceBorrowed) / (priceCollateral * exchangeRate) */ uint exchangeRateMantissa = QiToken(qiTokenCollateral).exchangeRateStored(); // Note: reverts on error uint seizeTokens; Exp memory numerator; Exp memory denominator; Exp memory ratio; numerator = mul_(Exp({mantissa: liquidationIncentiveMantissa}), Exp({mantissa: priceBorrowedMantissa})); denominator = mul_(Exp({mantissa: priceCollateralMantissa}), Exp({mantissa: exchangeRateMantissa})); ratio = div_(numerator, denominator); seizeTokens = mul_ScalarTruncate(ratio, actualRepayAmount); return (uint(Error.NO_ERROR), seizeTokens); } /*** Admin Functions ***/ /** * @notice Sets a new price oracle for the comptroller * @dev Admin function to set a new price oracle * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPriceOracle(PriceOracle newOracle) public returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PRICE_ORACLE_OWNER_CHECK); } // Track the old oracle for the comptroller PriceOracle oldOracle = oracle; // Set comptroller's oracle to newOracle oracle = newOracle; // Emit NewPriceOracle(oldOracle, newOracle) emit NewPriceOracle(oldOracle, newOracle); return uint(Error.NO_ERROR); } /** * @notice Sets the closeFactor used when liquidating borrows * @dev Admin function to set closeFactor * @param newCloseFactorMantissa New close factor, scaled by 1e18 * @return uint 0=success, otherwise a failure */ function _setCloseFactor(uint newCloseFactorMantissa) external returns (uint) { // Check caller is admin require(msg.sender == admin, "only admin can set close factor"); uint oldCloseFactorMantissa = closeFactorMantissa; closeFactorMantissa = newCloseFactorMantissa; emit NewCloseFactor(oldCloseFactorMantissa, closeFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Sets the collateralFactor for a market * @dev Admin function to set per-market collateralFactor * @param qiToken The market to set the factor on * @param newCollateralFactorMantissa The new collateral factor, scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setCollateralFactor(QiToken qiToken, uint newCollateralFactorMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_COLLATERAL_FACTOR_OWNER_CHECK); } // Verify market is listed Market storage market = markets[address(qiToken)]; if (!market.isListed) { return fail(Error.MARKET_NOT_LISTED, FailureInfo.SET_COLLATERAL_FACTOR_NO_EXISTS); } Exp memory newCollateralFactorExp = Exp({mantissa: newCollateralFactorMantissa}); // Check collateral factor <= 0.9 Exp memory highLimit = Exp({mantissa: collateralFactorMaxMantissa}); if (lessThanExp(highLimit, newCollateralFactorExp)) { return fail(Error.INVALID_COLLATERAL_FACTOR, FailureInfo.SET_COLLATERAL_FACTOR_VALIDATION); } // If collateral factor != 0, fail if price == 0 if (newCollateralFactorMantissa != 0 && oracle.getUnderlyingPrice(qiToken) == 0) { return fail(Error.PRICE_ERROR, FailureInfo.SET_COLLATERAL_FACTOR_WITHOUT_PRICE); } // Set market's collateral factor to new collateral factor, remember old value uint oldCollateralFactorMantissa = market.collateralFactorMantissa; market.collateralFactorMantissa = newCollateralFactorMantissa; // Emit event with asset, old collateral factor, and new collateral factor emit NewCollateralFactor(qiToken, oldCollateralFactorMantissa, newCollateralFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Sets liquidationIncentive * @dev Admin function to set liquidationIncentive * @param newLiquidationIncentiveMantissa New liquidationIncentive scaled by 1e18 * @return uint 0=success, otherwise a failure. (See ErrorReporter for details) */ function _setLiquidationIncentive(uint newLiquidationIncentiveMantissa) external returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_LIQUIDATION_INCENTIVE_OWNER_CHECK); } // Save current value for use in log uint oldLiquidationIncentiveMantissa = liquidationIncentiveMantissa; // Set liquidation incentive to new incentive liquidationIncentiveMantissa = newLiquidationIncentiveMantissa; // Emit event with old incentive, new incentive emit NewLiquidationIncentive(oldLiquidationIncentiveMantissa, newLiquidationIncentiveMantissa); return uint(Error.NO_ERROR); } /** * @notice Add the market to the markets mapping and set it as listed * @dev Admin function to set isListed and add support for the market * @param qiToken The address of the market (token) to list * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _supportMarket(QiToken qiToken) external returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SUPPORT_MARKET_OWNER_CHECK); } if (markets[address(qiToken)].isListed) { return fail(Error.MARKET_ALREADY_LISTED, FailureInfo.SUPPORT_MARKET_EXISTS); } qiToken.isQiToken(); // Sanity check to make sure its really a QiToken // Note that isQied is not in active use anymore markets[address(qiToken)] = Market({isListed: true, isQied: false, collateralFactorMantissa: 0}); _addMarketInternal(address(qiToken)); emit MarketListed(qiToken); return uint(Error.NO_ERROR); } function _addMarketInternal(address qiToken) internal { for (uint i = 0; i < allMarkets.length; i ++) { require(allMarkets[i] != QiToken(qiToken), "market already added"); } allMarkets.push(QiToken(qiToken)); } /** * @notice Set the given borrow caps for the given qiToken markets. Borrowing that brings total borrows to or above borrow cap will revert. * @dev Admin or borrowCapGuardian function to set the borrow caps. A borrow cap of 0 corresponds to unlimited borrowing. * @param qiTokens The addresses of the markets (tokens) to change the borrow caps for * @param newBorrowCaps The new borrow cap values in underlying to be set. A value of 0 corresponds to unlimited borrowing. */ function _setMarketBorrowCaps(QiToken[] calldata qiTokens, uint[] calldata newBorrowCaps) external { require(msg.sender == admin || msg.sender == borrowCapGuardian, "only admin or borrow cap guardian can set borrow caps"); uint numMarkets = qiTokens.length; uint numBorrowCaps = newBorrowCaps.length; require(numMarkets != 0 && numMarkets == numBorrowCaps, "invalid input"); for(uint i = 0; i < numMarkets; i++) { borrowCaps[address(qiTokens[i])] = newBorrowCaps[i]; emit NewBorrowCap(qiTokens[i], newBorrowCaps[i]); } } /** * @notice Admin function to change the Borrow Cap Guardian * @param newBorrowCapGuardian The address of the new Borrow Cap Guardian */ function _setBorrowCapGuardian(address newBorrowCapGuardian) external { require(msg.sender == admin, "only admin can set borrow cap guardian"); // Save current value for inclusion in log address oldBorrowCapGuardian = borrowCapGuardian; // Store borrowCapGuardian with value newBorrowCapGuardian borrowCapGuardian = newBorrowCapGuardian; // Emit NewBorrowCapGuardian(OldBorrowCapGuardian, NewBorrowCapGuardian) emit NewBorrowCapGuardian(oldBorrowCapGuardian, newBorrowCapGuardian); } /** * @notice Admin function to change the Pause Guardian * @param newPauseGuardian The address of the new Pause Guardian * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _setPauseGuardian(address newPauseGuardian) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PAUSE_GUARDIAN_OWNER_CHECK); } // Save current value for inclusion in log address oldPauseGuardian = pauseGuardian; // Store pauseGuardian with value newPauseGuardian pauseGuardian = newPauseGuardian; // Emit NewPauseGuardian(OldPauseGuardian, NewPauseGuardian) emit NewPauseGuardian(oldPauseGuardian, pauseGuardian); return uint(Error.NO_ERROR); } function _setMintPaused(QiToken qiToken, bool state) public returns (bool) { require(markets[address(qiToken)].isListed, "cannot pause a market that is not listed"); require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); mintGuardianPaused[address(qiToken)] = state; emit ActionPaused(qiToken, "Mint", state); return state; } function _setBorrowPaused(QiToken qiToken, bool state) public returns (bool) { require(markets[address(qiToken)].isListed, "cannot pause a market that is not listed"); require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); borrowGuardianPaused[address(qiToken)] = state; emit ActionPaused(qiToken, "Borrow", state); return state; } function _setTransferPaused(bool state) public returns (bool) { require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); transferGuardianPaused = state; emit ActionPaused("Transfer", state); return state; } function _setSeizePaused(bool state) public returns (bool) { require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause"); require(msg.sender == admin || state == true, "only admin can unpause"); seizeGuardianPaused = state; emit ActionPaused("Seize", state); return state; } function _become(Unitroller unitroller) public { require(msg.sender == unitroller.admin(), "only unitroller admin can change brains"); require(unitroller._acceptImplementation() == 0, "change not authorized"); } /** * @notice Checks caller is admin, or this contract is becoming the new implementation */ function adminOrInitializing() internal view returns (bool) { return msg.sender == admin || msg.sender == comptrollerImplementation; } /*** Benqi Distribution ***/ /** * @notice Set reward speed for a single market * @param rewardType 0: Qi, 1: Avax * @param qiToken Market whose speed to update * @param newSupplyRewardSpeed New supply speed * @param newBorrowRewardSpeed New borrow speed */ function setRewardSpeedInternal(uint8 rewardType, QiToken qiToken, uint newSupplyRewardSpeed, uint newBorrowRewardSpeed) internal { uint currentSupplyRewardSpeed = supplyRewardSpeeds[rewardType][address(qiToken)]; uint currentBorrowRewardSpeed = borrowRewardSpeeds[rewardType][address(qiToken)]; if (currentSupplyRewardSpeed != 0) { updateRewardSupplyIndex(rewardType, address(qiToken)); } else if (newSupplyRewardSpeed != 0) { Market storage market = markets[address(qiToken)]; require(market.isListed, "Market is not listed"); if (rewardSupplyState[rewardType][address(qiToken)].index == 0 && rewardSupplyState[rewardType][address(qiToken)].timestamp == 0) { rewardSupplyState[rewardType][address(qiToken)] = RewardMarketState({ index: initialIndexConstant, timestamp: safe32(getBlockTimestamp(), "block timestamp exceeds 32 bits") }); } } if (currentBorrowRewardSpeed != 0) { Exp memory borrowIndex = Exp({ mantissa: qiToken.borrowIndex() }); updateRewardBorrowIndex(rewardType, address(qiToken), borrowIndex); } else if (newBorrowRewardSpeed != 0) { Market storage market = markets[address(qiToken)]; require(market.isListed, "Market is not listed"); if (rewardBorrowState[rewardType][address(qiToken)].index == 0 && rewardBorrowState[rewardType][address(qiToken)].timestamp == 0) { rewardBorrowState[rewardType][address(qiToken)] = RewardMarketState({ index: initialIndexConstant, timestamp: safe32(getBlockTimestamp(), "block timestamp exceeds 32 bits") }); } } if (currentSupplyRewardSpeed != newSupplyRewardSpeed) { supplyRewardSpeeds[rewardType][address(qiToken)] = newSupplyRewardSpeed; emit SupplyRewardSpeedUpdated(rewardType, qiToken, newSupplyRewardSpeed); } if (currentBorrowRewardSpeed != newBorrowRewardSpeed) { borrowRewardSpeeds[rewardType][address(qiToken)] = newBorrowRewardSpeed; emit BorrowRewardSpeedUpdated(rewardType, qiToken, newBorrowRewardSpeed); } } /** * @notice Accrue BENQI to the market by updating the supply index * @param rewardType 0: Qi, 1: Avax * @param qiToken The market whose supply index to update */ function updateRewardSupplyIndex(uint8 rewardType, address qiToken) internal { require(rewardType <= 1, "rewardType is invalid"); RewardMarketState storage supplyState = rewardSupplyState[rewardType][qiToken]; uint supplySpeed = supplyRewardSpeeds[rewardType][qiToken]; uint blockTimestamp = getBlockTimestamp(); uint deltaTimestamps = sub_(blockTimestamp, uint(supplyState.timestamp)); if (deltaTimestamps > 0 && supplySpeed > 0) { uint supplyTokens = QiToken(qiToken).totalSupply(); uint qiAccrued = mul_(deltaTimestamps, supplySpeed); Double memory ratio = supplyTokens > 0 ? fraction(qiAccrued, supplyTokens) : Double({mantissa: 0}); Double memory index = add_(Double({mantissa: supplyState.index}), ratio); rewardSupplyState[rewardType][qiToken] = RewardMarketState({ index: safe224(index.mantissa, "new index exceeds 224 bits"), timestamp: safe32(blockTimestamp, "block timestamp exceeds 32 bits") }); } else if (deltaTimestamps > 0) { supplyState.timestamp = safe32(blockTimestamp, "block timestamp exceeds 32 bits"); } } /** * @notice Accrue BENQI to the market by updating the borrow index * @param rewardType 0: Qi, 1: Avax * @param qiToken The market whose borrow index to update */ function updateRewardBorrowIndex(uint8 rewardType, address qiToken, Exp memory marketBorrowIndex) internal { require(rewardType <= 1, "rewardType is invalid"); RewardMarketState storage borrowState = rewardBorrowState[rewardType][qiToken]; uint borrowSpeed = borrowRewardSpeeds[rewardType][qiToken]; uint blockTimestamp = getBlockTimestamp(); uint deltaTimestamps = sub_(blockTimestamp, uint(borrowState.timestamp)); if (deltaTimestamps > 0 && borrowSpeed > 0) { uint borrowAmount = div_(QiToken(qiToken).totalBorrows(), marketBorrowIndex); uint qiAccrued = mul_(deltaTimestamps, borrowSpeed); Double memory ratio = borrowAmount > 0 ? fraction(qiAccrued, borrowAmount) : Double({mantissa: 0}); Double memory index = add_(Double({mantissa: borrowState.index}), ratio); rewardBorrowState[rewardType][qiToken] = RewardMarketState({ index: safe224(index.mantissa, "new index exceeds 224 bits"), timestamp: safe32(blockTimestamp, "block timestamp exceeds 32 bits") }); } else if (deltaTimestamps > 0) { borrowState.timestamp = safe32(blockTimestamp, "block timestamp exceeds 32 bits"); } } /** * @notice Refactored function to calc and rewards accounts supplier rewards * @param qiToken The market to verify the mint against * @param account The acount to whom BENQI or AVAX is rewarded */ function updateAndDistributeSupplierRewardsForToken(address qiToken, address account) internal { for (uint8 rewardType = 0; rewardType <= 1; rewardType++) { updateRewardSupplyIndex(rewardType, qiToken); distributeSupplierReward(rewardType, qiToken, account); } } /** * @notice Calculate BENQI/AVAX accrued by a supplier and possibly transfer it to them * @param rewardType 0: Qi, 1: Avax * @param qiToken The market in which the supplier is interacting * @param supplier The address of the supplier to distribute BENQI to */ function distributeSupplierReward(uint8 rewardType, address qiToken, address supplier) internal { require(rewardType <= 1, "rewardType is invalid"); RewardMarketState storage supplyState = rewardSupplyState[rewardType][qiToken]; Double memory supplyIndex = Double({mantissa: supplyState.index}); Double memory supplierIndex = Double({mantissa: rewardSupplierIndex[rewardType][qiToken][supplier]}); rewardSupplierIndex[rewardType][qiToken][supplier] = supplyIndex.mantissa; if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) { supplierIndex.mantissa = initialIndexConstant; } Double memory deltaIndex = sub_(supplyIndex, supplierIndex); uint supplierTokens = QiToken(qiToken).balanceOf(supplier); uint supplierDelta = mul_(supplierTokens, deltaIndex); uint supplierAccrued = add_(rewardAccrued[rewardType][supplier], supplierDelta); rewardAccrued[rewardType][supplier] = supplierAccrued; emit DistributedSupplierReward(rewardType, QiToken(qiToken), supplier, supplierDelta, supplyIndex.mantissa); } /** * @notice Refactored function to calc and rewards accounts supplier rewards * @param qiToken The market to verify the mint against * @param borrower Borrower to be rewarded */ function updateAndDistributeBorrowerRewardsForToken(address qiToken, address borrower, Exp memory marketBorrowIndex) internal { for (uint8 rewardType = 0; rewardType <= 1; rewardType++) { updateRewardBorrowIndex(rewardType, qiToken, marketBorrowIndex); distributeBorrowerReward(rewardType, qiToken, borrower, marketBorrowIndex); } } /** * @notice Calculate BENQI accrued by a borrower and possibly transfer it to them * @dev Borrowers will not begin to accrue until after the first interaction with the protocol. * @param rewardType 0: Qi, 1: Avax * @param qiToken The market in which the borrower is interacting * @param borrower The address of the borrower to distribute BENQI to */ function distributeBorrowerReward(uint8 rewardType, address qiToken, address borrower, Exp memory marketBorrowIndex) internal { require(rewardType <= 1, "rewardType is invalid"); RewardMarketState storage borrowState = rewardBorrowState [rewardType][qiToken]; Double memory borrowIndex = Double({mantissa: borrowState.index}); Double memory borrowerIndex = Double({mantissa: rewardBorrowerIndex[rewardType][qiToken][borrower]}); rewardBorrowerIndex[rewardType][qiToken][borrower] = borrowIndex.mantissa; if (borrowerIndex.mantissa > 0) { Double memory deltaIndex = sub_(borrowIndex, borrowerIndex); uint borrowerAmount = div_(QiToken(qiToken).borrowBalanceStored(borrower), marketBorrowIndex); uint borrowerDelta = mul_(borrowerAmount, deltaIndex); uint borrowerAccrued = add_(rewardAccrued[rewardType][borrower], borrowerDelta); rewardAccrued[rewardType][borrower] = borrowerAccrued; emit DistributedBorrowerReward(rewardType, QiToken(qiToken), borrower, borrowerDelta, borrowIndex.mantissa); } } /** * @notice Claim all the benqi accrued by holder in all markets * @param holder The address to claim BENQI for */ function claimReward(uint8 rewardType, address payable holder) public { return claimReward(rewardType,holder, allMarkets); } /** * @notice Claim all the benqi accrued by holder in the specified markets * @param holder The address to claim BENQI for * @param qiTokens The list of markets to claim BENQI in */ function claimReward(uint8 rewardType, address payable holder, QiToken[] memory qiTokens) public { address payable [] memory holders = new address payable[](1); holders[0] = holder; claimReward(rewardType, holders, qiTokens, true, true); } /** * @notice Claim all Benqi or Avax accrued by the holders * @param rewardType 0 means Qi 1 means Avax * @param holders The addresses to claim AVAX for * @param qiTokens The list of markets to claim AVAX in * @param borrowers Whether or not to claim AVAX earned by borrowing * @param suppliers Whether or not to claim AVAX earned by supplying */ function claimReward(uint8 rewardType, address payable[] memory holders, QiToken[] memory qiTokens, bool borrowers, bool suppliers) public payable { require(rewardType <= 1, "rewardType is invalid"); for (uint i = 0; i < qiTokens.length; i++) { QiToken qiToken = qiTokens[i]; require(markets[address(qiToken)].isListed, "market must be listed"); if (borrowers == true) { Exp memory borrowIndex = Exp({mantissa: qiToken.borrowIndex()}); updateRewardBorrowIndex(rewardType,address(qiToken), borrowIndex); for (uint j = 0; j < holders.length; j++) { distributeBorrowerReward(rewardType,address(qiToken), holders[j], borrowIndex); grantRewardInternal(rewardType, holders[j], rewardAccrued[rewardType][holders[j]]); } } if (suppliers == true) { updateRewardSupplyIndex(rewardType,address(qiToken)); for (uint j = 0; j < holders.length; j++) { distributeSupplierReward(rewardType,address(qiToken), holders[j]); grantRewardInternal(rewardType, holders[j], rewardAccrued[rewardType][holders[j]]); } } } } /** * @notice Transfer QI/AVAX to the user * @dev Note: If there is not enough BENQI/AVAX, we do not perform the transfer all. * @param user The address of the user to transfer AVAX to * @param amount The amount of AVAX to (possibly) transfer * @return The amount of AVAX which was NOT transferred to the user */ function grantRewardInternal(uint8 rewardType, address payable user, uint amount) internal { if (rewardType == 0) { Qi benqi = Qi(qiAddress); uint qiRemaining = benqi.balanceOf(address(this)); if (amount > 0 && amount <= qiRemaining) { rewardAccrued[rewardType][user] = 0; benqi.transfer(user, amount); return; } } else if (rewardType == 1) { uint avaxRemaining = address(this).balance; if (amount > 0 && amount <= avaxRemaining) { rewardAccrued[rewardType][user] = 0; (bool success, ) = user.call.value(amount).gas(4029)(""); require(success, "Transfer failed."); return; } } rewardAccrued[rewardType][user] = amount; } /*** Benqi Distribution Admin ***/ /** * @notice Transfer BENQI to the recipient * @dev Note: If there is not enough BENQI, we do not perform the transfer all. * @param recipient The address of the recipient to transfer BENQI to * @param amount The amount of BENQI to (possibly) transfer */ function _grantQi(address recipient, uint amount) public { require(adminOrInitializing(), "only admin can grant benqi"); require(amount > 0, "amount must be greater than zero"); require(amount <= Qi(qiAddress).balanceOf(address(this)), "insufficient benqi for grant"); Qi(qiAddress).transfer(recipient, amount); emit QiGranted(recipient, amount); } /** * @notice Set reward speed for a single market * @param rewardType 0 = QI, 1 = AVAX * @param qiToken The market whose reward speed to update * @param supplyRewardSpeed New supply reward speed for the market * @param borrowRewardSpeed New borrow reward speed for the market */ function _setRewardSpeed(uint8 rewardType, QiToken qiToken, uint supplyRewardSpeed, uint borrowRewardSpeed) public { require(rewardType <= 1, "rewardType is invalid"); require(adminOrInitializing(), "only admin can set reward speed"); setRewardSpeedInternal(rewardType, qiToken, supplyRewardSpeed, borrowRewardSpeed); } /** * @notice Return all of the markets * @dev The automatic getter may be used to access an individual market. * @return The list of market addresses */ function getAllMarkets() public view returns (QiToken[] memory) { return allMarkets; } function getBlockTimestamp() public view returns (uint) { return block.timestamp; } /** * @notice Set the QI token address */ function setQiAddress(address newQiAddress) public { require(msg.sender == admin); qiAddress = newQiAddress; } /** * @notice payable function needed to receive AVAX */ function () payable external { } }