Overview
GLMR Balance
0 GLMR
GLMR Value
$0.00More Info
Private Name Tags
ContractCreator
Latest 1 from a total of 1 transactions
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0x60806040 | 1331122 | 886 days ago | IN | 0 GLMR | 0.5396589 |
Latest 25 internal transactions (View All)
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8565829 | 1 hr ago | 42.3475379 GLMR | ||||
8565829 | 1 hr ago | 3.28045551 GLMR | ||||
8565676 | 1 hr ago | 0.00000003 GLMR | ||||
8565676 | 1 hr ago | 6.0188527 GLMR | ||||
8565676 | 1 hr ago | 0.00000246 GLMR | ||||
8565676 | 1 hr ago | 0.00000024 GLMR | ||||
8565676 | 1 hr ago | 20.10998283 GLMR | ||||
8565676 | 1 hr ago | 0 GLMR | ||||
8565676 | 1 hr ago | 6.94108883 GLMR | ||||
8565676 | 1 hr ago | 0.20500621 GLMR | ||||
8565622 | 1 hr ago | 2.27021574 GLMR | ||||
8565213 | 2 hrs ago | 0.3593704 GLMR | ||||
8565213 | 2 hrs ago | 0.89048576 GLMR | ||||
8565213 | 2 hrs ago | 2.33230856 GLMR | ||||
8565213 | 2 hrs ago | 1.31999464 GLMR | ||||
8565213 | 2 hrs ago | 1.33972782 GLMR | ||||
8565213 | 2 hrs ago | 0.00285622 GLMR | ||||
8565213 | 2 hrs ago | 5.69245938 GLMR | ||||
8565213 | 2 hrs ago | 14.50581715 GLMR | ||||
8564881 | 2 hrs ago | 11.16724927 GLMR | ||||
8564881 | 2 hrs ago | 14.30995456 GLMR | ||||
8564853 | 2 hrs ago | 0.00002917 GLMR | ||||
8564853 | 2 hrs ago | 0.59967926 GLMR | ||||
8564853 | 2 hrs ago | 0.0000001 GLMR | ||||
8564853 | 2 hrs ago | 2.10105481 GLMR |
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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0xa962F297...1e42aeF16 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
Comptroller
Compiler Version
v0.5.17+commit.d19bba13
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
pragma solidity 0.5.17; import "./MToken.sol"; import "./ErrorReporter.sol"; import "./PriceOracle.sol"; import "./ComptrollerInterface.sol"; import "./ComptrollerStorage.sol"; import "./Unitroller.sol"; import "./Governance/Well.sol"; /** * @title Moonwell's Comptroller Contract * @author Moonwell */ contract Comptroller is ComptrollerVXStorage, ComptrollerInterface, ComptrollerErrorReporter, ExponentialNoError { /// @notice Emitted when an admin supports a market event MarketListed(MToken mToken); /// @notice Emitted when an account enters a market event MarketEntered(MToken mToken, address account); /// @notice Emitted when an account exits a market event MarketExited(MToken mToken, 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(MToken mToken, 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(MToken mToken, string action, bool pauseState); /// @notice Emitted when supply reward speed is updated event SupplyRewardSpeedUpdated(uint8 rewardToken, MToken indexed mToken, uint newSupplyRewardSpeed); /// @notice Emitted when borrow reward speed is updated event BorrowRewardSpeedUpdated(uint8 rewardToken, MToken indexed mToken, uint newBorrowRewardSpeed); /// @notice Emitted when a new WELL speed is set for a contributor event ContributorWellSpeedUpdated(address indexed contributor, uint newSpeed); /// @notice Emitted when WELL or GLMR is distributed to a borrower event DistributedBorrowerReward(uint8 indexed tokenType, MToken indexed mToken, address indexed borrower, uint wellDelta, uint wellBorrowIndex); /// @notice Emitted when WELL or GLMR is distributed to a supplier event DistributedSupplierReward(uint8 indexed tokenType, MToken indexed mToken, address indexed supplier, uint wellDelta, uint wellSupplyIndex); /// @notice Emitted when borrow cap for a mToken is changed event NewBorrowCap(MToken indexed mToken, uint newBorrowCap); /// @notice Emitted when borrow cap guardian is changed event NewBorrowCapGuardian(address oldBorrowCapGuardian, address newBorrowCapGuardian); /// @notice Emitted when WELL is granted by admin event WellGranted(address recipient, uint amount); /// @notice The initial WELL and GLMR 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 WELL or GLMR uint8 public constant rewardWell = 0; uint8 public constant rewardGlmr = 1; // The amount of gas to use when making a native asset transfer. uint16 public gasAmount = 2300; /// @notice Emitted when the admin changes the gas amount. event NewGasAmount(uint16 oldGasAmount, uint16 newGasAmount); 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 (MToken[] memory) { MToken[] 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 mToken The mToken to check * @return True if the account is in the asset, otherwise false. */ function checkMembership(address account, MToken mToken) external view returns (bool) { return markets[address(mToken)].accountMembership[account]; } /** * @notice Add assets to be included in account liquidity calculation * @param mTokens The list of addresses of the mToken markets to be enabled * @return Success indicator for whether each corresponding market was entered */ function enterMarkets(address[] memory mTokens) public returns (uint[] memory) { uint len = mTokens.length; uint[] memory results = new uint[](len); for (uint i = 0; i < len; i++) { MToken mToken = MToken(mTokens[i]); results[i] = uint(addToMarketInternal(mToken, msg.sender)); } return results; } /** * @notice Add the market to the borrower's "assets in" for liquidity calculations * @param mToken The market to enter * @param borrower The address of the account to modify * @return Success indicator for whether the market was entered */ function addToMarketInternal(MToken mToken, address borrower) internal returns (Error) { Market storage marketToJoin = markets[address(mToken)]; 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(mToken); emit MarketEntered(mToken, 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 mTokenAddress The address of the asset to be removed * @return Whether or not the account successfully exited the market */ function exitMarket(address mTokenAddress) external returns (uint) { MToken mToken = MToken(mTokenAddress); /* Get sender tokensHeld and amountOwed underlying from the mToken */ (uint oErr, uint tokensHeld, uint amountOwed, ) = mToken.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(mTokenAddress, msg.sender, tokensHeld); if (allowed != 0) { return failOpaque(Error.REJECTION, FailureInfo.EXIT_MARKET_REJECTION, allowed); } Market storage marketToExit = markets[address(mToken)]; /* Return true if the sender is not already ‘in’ the market */ if (!marketToExit.accountMembership[msg.sender]) { return uint(Error.NO_ERROR); } /* Set mToken account membership to false */ delete marketToExit.accountMembership[msg.sender]; /* Delete mToken from the account’s list of assets */ // load into memory for faster iteration MToken[] memory userAssetList = accountAssets[msg.sender]; uint len = userAssetList.length; uint assetIndex = len; for (uint i = 0; i < len; i++) { if (userAssetList[i] == mToken) { 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 MToken[] storage storedList = accountAssets[msg.sender]; storedList[assetIndex] = storedList[storedList.length - 1]; storedList.length--; emit MarketExited(mToken, 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 mToken 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 mToken, address minter, uint mintAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!mintGuardianPaused[mToken], "mint is paused"); // Shh - currently unused mintAmount; if (!markets[mToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving updateAndDistributeSupplierRewardsForToken(mToken, minter); return uint(Error.NO_ERROR); } /** * @notice Validates mint and reverts on rejection. May emit logs. * @param mToken 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 mToken, address minter, uint actualMintAmount, uint mintTokens) external { // Shh - currently unused mToken; 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 mToken The market to verify the redeem against * @param redeemer The account which would redeem the tokens * @param redeemTokens The number of mTokens 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 mToken, address redeemer, uint redeemTokens) external returns (uint) { uint allowed = redeemAllowedInternal(mToken, redeemer, redeemTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateAndDistributeSupplierRewardsForToken(mToken, redeemer); return uint(Error.NO_ERROR); } function redeemAllowedInternal(address mToken, address redeemer, uint redeemTokens) internal view returns (uint) { if (!markets[mToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } /* If the redeemer is not 'in' the market, then we can bypass the liquidity check */ if (!markets[mToken].accountMembership[redeemer]) { return uint(Error.NO_ERROR); } /* Otherwise, perform a hypothetical liquidity check to guard against shortfall */ (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(redeemer, MToken(mToken), 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 mToken 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 mToken, address redeemer, uint redeemAmount, uint redeemTokens) external { // Shh - currently unused mToken; 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 mToken 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 mToken, address borrower, uint borrowAmount) external returns (uint) { // Pausing is a very serious situation - we revert to sound the alarms require(!borrowGuardianPaused[mToken], "borrow is paused"); if (!markets[mToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (!markets[mToken].accountMembership[borrower]) { // only mTokens may call borrowAllowed if borrower not in market require(msg.sender == mToken, "sender must be mToken"); // attempt to add borrower to the market Error err = addToMarketInternal(MToken(msg.sender), borrower); if (err != Error.NO_ERROR) { return uint(err); } // it should be impossible to break the important invariant assert(markets[mToken].accountMembership[borrower]); } if (oracle.getUnderlyingPrice(MToken(mToken)) == 0) { return uint(Error.PRICE_ERROR); } uint borrowCap = borrowCaps[mToken]; // Borrow cap of 0 corresponds to unlimited borrowing if (borrowCap != 0) { uint totalBorrows = MToken(mToken).totalBorrows(); uint nextTotalBorrows = add_(totalBorrows, borrowAmount); require(nextTotalBorrows < borrowCap, "market borrow cap reached"); } (Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(borrower, MToken(mToken), 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: MToken(mToken).borrowIndex()}); updateAndDistributeBorrowerRewardsForToken(mToken, borrower, borrowIndex); return uint(Error.NO_ERROR); } /** * @notice Validates borrow and reverts on rejection. May emit logs. * @param mToken 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 mToken, address borrower, uint borrowAmount) external { // Shh - currently unused mToken; 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 mToken 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 mToken, address payer, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused payer; borrower; repayAmount; if (!markets[mToken].isListed) { return uint(Error.MARKET_NOT_LISTED); } // Keep the flywheel moving Exp memory borrowIndex = Exp({mantissa: MToken(mToken).borrowIndex()}); updateAndDistributeBorrowerRewardsForToken(mToken, borrower, borrowIndex); return uint(Error.NO_ERROR); } /** * @notice Validates repayBorrow and reverts on rejection. May emit logs. * @param mToken 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 mToken, address payer, address borrower, uint actualRepayAmount, uint borrowerIndex) external { // Shh - currently unused mToken; 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 mTokenBorrowed Asset which was borrowed by the borrower * @param mTokenCollateral 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 mTokenBorrowed, address mTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint) { // Shh - currently unused liquidator; if (!markets[mTokenBorrowed].isListed || !markets[mTokenCollateral].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 = MToken(mTokenBorrowed).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 mTokenBorrowed Asset which was borrowed by the borrower * @param mTokenCollateral 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 mTokenBorrowed, address mTokenCollateral, address liquidator, address borrower, uint actualRepayAmount, uint seizeTokens) external { // Shh - currently unused mTokenBorrowed; mTokenCollateral; 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 mTokenCollateral Asset which was used as collateral and will be seized * @param mTokenBorrowed 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 mTokenCollateral, address mTokenBorrowed, 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[mTokenCollateral].isListed || !markets[mTokenBorrowed].isListed) { return uint(Error.MARKET_NOT_LISTED); } if (MToken(mTokenCollateral).comptroller() != MToken(mTokenBorrowed).comptroller()) { return uint(Error.COMPTROLLER_MISMATCH); } // Keep the flywheel moving updateAndDistributeSupplierRewardsForToken(mTokenCollateral, borrower); updateAndDistributeSupplierRewardsForToken(mTokenCollateral, liquidator); return uint(Error.NO_ERROR); } /** * @notice Validates seize and reverts on rejection. May emit logs. * @param mTokenCollateral Asset which was used as collateral and will be seized * @param mTokenBorrowed 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 mTokenCollateral, address mTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external { // Shh - currently unused mTokenCollateral; mTokenBorrowed; 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 mToken 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 mTokens to transfer * @return 0 if the transfer is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol) */ function transferAllowed(address mToken, 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(mToken, src, transferTokens); if (allowed != uint(Error.NO_ERROR)) { return allowed; } // Keep the flywheel moving updateAndDistributeSupplierRewardsForToken(mToken, src); updateAndDistributeSupplierRewardsForToken(mToken, dst); return uint(Error.NO_ERROR); } /** * @notice Validates transfer and reverts on rejection. May emit logs. * @param mToken Asset being transferred * @param src The account which sources the tokens * @param dst The account which receives the tokens * @param transferTokens The number of mTokens to transfer */ function transferVerify(address mToken, address src, address dst, uint transferTokens) external { // Shh - currently unused mToken; 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 `mTokenBalance` is the number of mTokens 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 mTokenBalance; 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, MToken(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, MToken(0), 0, 0); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param mTokenModify 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 mTokenModify, uint redeemTokens, uint borrowAmount) public view returns (uint, uint, uint) { (Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, MToken(mTokenModify), redeemTokens, borrowAmount); return (uint(err), liquidity, shortfall); } /** * @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed * @param mTokenModify 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 mToken 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, MToken mTokenModify, 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 MToken[] memory assets = accountAssets[account]; for (uint i = 0; i < assets.length; i++) { MToken asset = assets[i]; // Read the balances and exchange rate from the mToken (oErr, vars.mTokenBalance, 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 -> glmr (normalized price value) vars.tokensToDenom = mul_(mul_(vars.collateralFactor, vars.exchangeRate), vars.oraclePrice); // sumCollateral += tokensToDenom * mTokenBalance vars.sumCollateral = mul_ScalarTruncateAddUInt(vars.tokensToDenom, vars.mTokenBalance, vars.sumCollateral); // sumBorrowPlusEffects += oraclePrice * borrowBalance vars.sumBorrowPlusEffects = mul_ScalarTruncateAddUInt(vars.oraclePrice, vars.borrowBalance, vars.sumBorrowPlusEffects); // Calculate effects of interacting with mTokenModify if (asset == mTokenModify) { // 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 mToken.liquidateBorrowFresh) * @param mTokenBorrowed The address of the borrowed mToken * @param mTokenCollateral The address of the collateral mToken * @param actualRepayAmount The amount of mTokenBorrowed underlying to convert into mTokenCollateral tokens * @return (errorCode, number of mTokenCollateral tokens to be seized in a liquidation) */ function liquidateCalculateSeizeTokens(address mTokenBorrowed, address mTokenCollateral, uint actualRepayAmount) external view returns (uint, uint) { /* Read oracle prices for borrowed and collateral markets */ uint priceBorrowedMantissa = oracle.getUnderlyingPrice(MToken(mTokenBorrowed)); uint priceCollateralMantissa = oracle.getUnderlyingPrice(MToken(mTokenCollateral)); 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 = MToken(mTokenCollateral).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 mToken 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(MToken mToken, 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(mToken)]; 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(mToken) == 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(mToken, 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 mToken The address of the market (token) to list * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _supportMarket(MToken mToken) external returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SUPPORT_MARKET_OWNER_CHECK); } if (markets[address(mToken)].isListed) { return fail(Error.MARKET_ALREADY_LISTED, FailureInfo.SUPPORT_MARKET_EXISTS); } mToken.isMToken(); // Sanity check to make sure its really a MToken // Note that isWelled is not in active use anymore markets[address(mToken)] = Market({isListed: true, isWelled: false, collateralFactorMantissa: 0}); _addMarketInternal(address(mToken)); emit MarketListed(mToken); return uint(Error.NO_ERROR); } function _addMarketInternal(address mToken) internal { for (uint i = 0; i < allMarkets.length; i ++) { require(allMarkets[i] != MToken(mToken), "market already added"); } allMarkets.push(MToken(mToken)); } /** * @notice Set the given borrow caps for the given mToken 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 mTokens 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(MToken[] calldata mTokens, uint[] calldata newBorrowCaps) external { require(msg.sender == admin || msg.sender == borrowCapGuardian, "only admin or borrow cap guardian can set borrow caps"); uint numMarkets = mTokens.length; uint numBorrowCaps = newBorrowCaps.length; require(numMarkets != 0 && numMarkets == numBorrowCaps, "invalid input"); for(uint i = 0; i < numMarkets; i++) { borrowCaps[address(mTokens[i])] = newBorrowCaps[i]; emit NewBorrowCap(mTokens[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); } /** * @notice Admin function to change the amount of gas sent with native token transfers * @param newGasAmount The new gas amount to use on native asset transfers. * @return uint 0=success, otherwise a failure. (See enum Error for details) */ function _setGasAmount(uint16 newGasAmount) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_GAS_AMOUNT_OWNER_CHECK); } require(newGasAmount >= 2300); // Save current value for inclusion in log uint16 oldGasAmount = gasAmount; // Store gasAmount with value gasAmount gasAmount = newGasAmount; // Emit NewGasAmount(oldGasAmount, newGasAmount) emit NewGasAmount(oldGasAmount, newGasAmount); return uint(Error.NO_ERROR); } function _setMintPaused(MToken mToken, bool state) public returns (bool) { require(markets[address(mToken)].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(mToken)] = state; emit ActionPaused(mToken, "Mint", state); return state; } function _setBorrowPaused(MToken mToken, bool state) public returns (bool) { require(markets[address(mToken)].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(mToken)] = state; emit ActionPaused(mToken, "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; } /*** WELL Distribution ***/ /** * @notice Set reward speed for a single market * @param rewardType 0: Well, 1: Glmr * @param mToken Market whose speed to update * @param newSupplyRewardSpeed New supply speed * @param newBorrowRewardSpeed New borrow speed */ function setRewardSpeedInternal(uint8 rewardType, MToken mToken, uint newSupplyRewardSpeed, uint newBorrowRewardSpeed) internal { uint currentSupplyRewardSpeed = supplyRewardSpeeds[rewardType][address(mToken)]; uint currentBorrowRewardSpeed = borrowRewardSpeeds[rewardType][address(mToken)]; if (currentSupplyRewardSpeed != 0) { updateRewardSupplyIndex(rewardType, address(mToken)); } else if (newSupplyRewardSpeed != 0) { Market storage market = markets[address(mToken)]; require(market.isListed, "Market is not listed"); if (rewardSupplyState[rewardType][address(mToken)].index == 0 && rewardSupplyState[rewardType][address(mToken)].timestamp == 0) { rewardSupplyState[rewardType][address(mToken)] = RewardMarketState({ index: initialIndexConstant, timestamp: safe32(getBlockTimestamp(), "block timestamp exceeds 32 bits") }); } } if (currentBorrowRewardSpeed != 0) { Exp memory borrowIndex = Exp({ mantissa: mToken.borrowIndex() }); updateRewardBorrowIndex(rewardType, address(mToken), borrowIndex); } else if (newBorrowRewardSpeed != 0) { Market storage market = markets[address(mToken)]; require(market.isListed, "Market is not listed"); if (rewardBorrowState[rewardType][address(mToken)].index == 0 && rewardBorrowState[rewardType][address(mToken)].timestamp == 0) { rewardBorrowState[rewardType][address(mToken)] = RewardMarketState({ index: initialIndexConstant, timestamp: safe32(getBlockTimestamp(), "block timestamp exceeds 32 bits") }); } } if (currentSupplyRewardSpeed != newSupplyRewardSpeed) { supplyRewardSpeeds[rewardType][address(mToken)] = newSupplyRewardSpeed; emit SupplyRewardSpeedUpdated(rewardType, mToken, newSupplyRewardSpeed); } if (currentBorrowRewardSpeed != newBorrowRewardSpeed) { borrowRewardSpeeds[rewardType][address(mToken)] = newBorrowRewardSpeed; emit BorrowRewardSpeedUpdated(rewardType, mToken, newBorrowRewardSpeed); } } /** * @notice Accrue WELL to the market by updating the supply index * @param rewardType 0: Well, 1: Glmr * @param mToken The market whose supply index to update */ function updateRewardSupplyIndex(uint8 rewardType, address mToken) internal { require(rewardType <= 1, "rewardType is invalid"); RewardMarketState storage supplyState = rewardSupplyState[rewardType][mToken]; uint supplySpeed = supplyRewardSpeeds[rewardType][mToken]; uint blockTimestamp = getBlockTimestamp(); uint deltaTimestamps = sub_(blockTimestamp, uint(supplyState.timestamp)); if (deltaTimestamps > 0 && supplySpeed > 0) { uint supplyTokens = MToken(mToken).totalSupply(); uint wellAccrued = mul_(deltaTimestamps, supplySpeed); Double memory ratio = supplyTokens > 0 ? fraction(wellAccrued, supplyTokens) : Double({mantissa: 0}); Double memory index = add_(Double({mantissa: supplyState.index}), ratio); rewardSupplyState[rewardType][mToken] = 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 WELL to the market by updating the borrow index * @param rewardType 0: Well, 1: Glmr * @param mToken The market whose borrow index to update */ function updateRewardBorrowIndex(uint8 rewardType, address mToken, Exp memory marketBorrowIndex) internal { require(rewardType <= 1, "rewardType is invalid"); RewardMarketState storage borrowState = rewardBorrowState[rewardType][mToken]; uint borrowSpeed = borrowRewardSpeeds[rewardType][mToken]; uint blockTimestamp = getBlockTimestamp(); uint deltaTimestamps = sub_(blockTimestamp, uint(borrowState.timestamp)); if (deltaTimestamps > 0 && borrowSpeed > 0) { uint borrowAmount = div_(MToken(mToken).totalBorrows(), marketBorrowIndex); uint wellAccrued = mul_(deltaTimestamps, borrowSpeed); Double memory ratio = borrowAmount > 0 ? fraction(wellAccrued, borrowAmount) : Double({mantissa: 0}); Double memory index = add_(Double({mantissa: borrowState.index}), ratio); rewardBorrowState[rewardType][mToken] = 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 mToken The market to verify the mint against * @param account The acount to whom WELL or GLMR is rewarded */ function updateAndDistributeSupplierRewardsForToken(address mToken, address account) internal { for (uint8 rewardType = 0; rewardType <= 1; rewardType++) { updateRewardSupplyIndex(rewardType, mToken); distributeSupplierReward(rewardType, mToken, account); } } /** * @notice Calculate WELL/GLMR accrued by a supplier and possibly transfer it to them * @param rewardType 0: Well, 1: Glmr * @param mToken The market in which the supplier is interacting * @param supplier The address of the supplier to distribute WELL to */ function distributeSupplierReward(uint8 rewardType, address mToken, address supplier) internal { require(rewardType <= 1, "rewardType is invalid"); RewardMarketState storage supplyState = rewardSupplyState[rewardType][mToken]; Double memory supplyIndex = Double({mantissa: supplyState.index}); Double memory supplierIndex = Double({mantissa: rewardSupplierIndex[rewardType][mToken][supplier]}); rewardSupplierIndex[rewardType][mToken][supplier] = supplyIndex.mantissa; if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) { supplierIndex.mantissa = initialIndexConstant; } Double memory deltaIndex = sub_(supplyIndex, supplierIndex); uint supplierTokens = MToken(mToken).balanceOf(supplier); uint supplierDelta = mul_(supplierTokens, deltaIndex); uint supplierAccrued = add_(rewardAccrued[rewardType][supplier], supplierDelta); rewardAccrued[rewardType][supplier] = supplierAccrued; emit DistributedSupplierReward(rewardType, MToken(mToken), supplier, supplierDelta, supplyIndex.mantissa); } /** * @notice Refactored function to calc and rewards accounts supplier rewards * @param mToken The market to verify the mint against * @param borrower Borrower to be rewarded */ function updateAndDistributeBorrowerRewardsForToken(address mToken, address borrower, Exp memory marketBorrowIndex) internal { for (uint8 rewardType = 0; rewardType <= 1; rewardType++) { updateRewardBorrowIndex(rewardType, mToken, marketBorrowIndex); distributeBorrowerReward(rewardType, mToken, borrower, marketBorrowIndex); } } /** * @notice Calculate WELL 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: Well, 1: Glmr * @param mToken The market in which the borrower is interacting * @param borrower The address of the borrower to distribute WELL to */ function distributeBorrowerReward(uint8 rewardType, address mToken, address borrower, Exp memory marketBorrowIndex) internal { require(rewardType <= 1, "rewardType is invalid"); RewardMarketState storage borrowState = rewardBorrowState [rewardType][mToken]; Double memory borrowIndex = Double({mantissa: borrowState.index}); Double memory borrowerIndex = Double({mantissa: rewardBorrowerIndex[rewardType][mToken][borrower]}); rewardBorrowerIndex[rewardType][mToken][borrower] = borrowIndex.mantissa; if (borrowerIndex.mantissa > 0) { Double memory deltaIndex = sub_(borrowIndex, borrowerIndex); uint borrowerAmount = div_(MToken(mToken).borrowBalanceStored(borrower), marketBorrowIndex); uint borrowerDelta = mul_(borrowerAmount, deltaIndex); uint borrowerAccrued = add_(rewardAccrued[rewardType][borrower], borrowerDelta); rewardAccrued[rewardType][borrower] = borrowerAccrued; emit DistributedBorrowerReward(rewardType, MToken(mToken), borrower, borrowerDelta, borrowIndex.mantissa); } } /** * @notice Claim all the WELL accrued by holder in all markets * @param holder The address to claim WELL for */ function claimReward(uint8 rewardType, address payable holder) public { return claimReward(rewardType,holder, allMarkets); } /** * @notice Claim all the WELL accrued by holder in the specified markets * @param holder The address to claim WELL for * @param mTokens The list of markets to claim WELL in */ function claimReward(uint8 rewardType, address payable holder, MToken[] memory mTokens) public { address payable [] memory holders = new address payable[](1); holders[0] = holder; claimReward(rewardType, holders, mTokens, true, true); } /** * @notice Claim all WELL or Glmr accrued by the holders * @param rewardType 0 means Well 1 means Glmr * @param holders The addresses to claim GLMR for * @param mTokens The list of markets to claim GLMR in * @param borrowers Whether or not to claim GLMR earned by borrowing * @param suppliers Whether or not to claim GLMR earned by supplying */ function claimReward(uint8 rewardType, address payable[] memory holders, MToken[] memory mTokens, bool borrowers, bool suppliers) public payable { require(rewardType <= 1, "rewardType is invalid"); for (uint i = 0; i < mTokens.length; i++) { MToken mToken = mTokens[i]; require(markets[address(mToken)].isListed, "market must be listed"); if (borrowers == true) { Exp memory borrowIndex = Exp({mantissa: mToken.borrowIndex()}); updateRewardBorrowIndex(rewardType,address(mToken), borrowIndex); for (uint j = 0; j < holders.length; j++) { distributeBorrowerReward(rewardType,address(mToken), holders[j], borrowIndex); rewardAccrued[rewardType][holders[j]] = grantRewardInternal(rewardType, holders[j], rewardAccrued[rewardType][holders[j]]); } } if (suppliers == true) { updateRewardSupplyIndex(rewardType,address(mToken)); for (uint j = 0; j < holders.length; j++) { distributeSupplierReward(rewardType,address(mToken), holders[j]); rewardAccrued[rewardType][holders[j]] = grantRewardInternal(rewardType, holders[j], rewardAccrued[rewardType][holders[j]]); } } } } /** * @notice Transfer WELL/GLMR to the user * @dev Note: If there is not enough WELL/GLMR, we do not perform the transfer all. * @param user The address of the user to transfer GLMR to * @param amount The amount of GLMR to (possibly) transfer * @return The amount of GLMR which was NOT transferred to the user */ function grantRewardInternal(uint rewardType, address payable user, uint amount) internal nonReentrant returns (uint) { if (rewardType == 0) { Well well = Well(wellAddress); uint wellRemaining = well.balanceOf(address(this)); if (amount > 0 && amount <= wellRemaining) { well.transfer(user, amount); return 0; } } else if (rewardType == 1) { uint glmrRemaining = address(this).balance; if (amount > 0 && amount <= glmrRemaining) { (bool success, ) = user.call.value(amount).gas(gasAmount)(""); require(success, "Transfer failed"); return 0; } } return amount; } /*** WELL Distribution Admin ***/ /** * @notice Transfer WELL to the recipient * @dev Note: If there is not enough WELL, we do not perform the transfer all. * @param recipient The address of the recipient to transfer WELL to * @param amount The amount of WELL to (possibly) transfer */ function _grantWell(address payable recipient, uint amount) public { require(adminOrInitializing(), "only admin can grant WELL"); uint amountLeft = grantRewardInternal(0, recipient, amount); require(amountLeft == 0, "insufficient WELL for grant"); emit WellGranted(recipient, amount); } /** * @notice Set reward speed for a single market * @param rewardType 0 = WELL, 1 = GLMR * @param mToken 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, MToken mToken, uint supplyRewardSpeed, uint borrowRewardSpeed) public { require(rewardType <= 1, "rewardType is invalid"); require(adminOrInitializing(), "only admin can set reward speed"); setRewardSpeedInternal(rewardType, mToken, 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 (MToken[] memory) { return allMarkets; } function getBlockTimestamp() public view returns (uint) { return block.timestamp; } /** * @notice Set the WELL token address */ function setWellAddress(address newWellAddress) public { require(msg.sender == admin); wellAddress = newWellAddress; } /** * @notice payable function needed to receive GLMR */ function () payable external { } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_locked != 1, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _locked = 1; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _locked = 0; } }
pragma solidity 0.5.17; import "./ComptrollerInterface.sol"; import "./MTokenInterfaces.sol"; import "./ErrorReporter.sol"; import "./Exponential.sol"; import "./EIP20Interface.sol"; import "./InterestRateModel.sol"; /** * @title Moonwell's MToken Contract * @notice Abstract base for MTokens * @author Moonwell */ contract MToken is MTokenInterface, Exponential, TokenErrorReporter { /** * @notice Initialize the money market * @param comptroller_ The address of the Comptroller * @param interestRateModel_ The address of the interest rate model * @param initialExchangeRateMantissa_ The initial exchange rate, scaled by 1e18 * @param name_ EIP-20 name of this token * @param symbol_ EIP-20 symbol of this token * @param decimals_ EIP-20 decimal precision of this token */ function initialize(ComptrollerInterface comptroller_, InterestRateModel interestRateModel_, uint initialExchangeRateMantissa_, string memory name_, string memory symbol_, uint8 decimals_) public { require(msg.sender == admin, "only admin may initialize the market"); require(accrualBlockTimestamp == 0 && borrowIndex == 0, "market may only be initialized once"); // Set initial exchange rate initialExchangeRateMantissa = initialExchangeRateMantissa_; require(initialExchangeRateMantissa > 0, "initial exchange rate must be greater than zero."); // Set the comptroller uint err = _setComptroller(comptroller_); require(err == uint(Error.NO_ERROR), "setting comptroller failed"); // Initialize block timestamp and borrow index (block timestamp mocks depend on comptroller being set) accrualBlockTimestamp = getBlockTimestamp(); borrowIndex = mantissaOne; // Set the interest rate model (depends on block timestamp / borrow index) err = _setInterestRateModelFresh(interestRateModel_); require(err == uint(Error.NO_ERROR), "setting interest rate model failed"); name = name_; symbol = symbol_; decimals = decimals_; // The counter starts true to prevent changing it from zero to non-zero (i.e. smaller cost/refund) _notEntered = true; } /** * @notice Transfer `tokens` tokens from `src` to `dst` by `spender` * @dev Called by both `transfer` and `transferFrom` internally * @param spender The address of the account performing the transfer * @param src The address of the source account * @param dst The address of the destination account * @param tokens The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferTokens(address spender, address src, address dst, uint tokens) internal returns (uint) { /* Fail if transfer not allowed */ uint allowed = comptroller.transferAllowed(address(this), src, dst, tokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.TRANSFER_COMPTROLLER_REJECTION, allowed); } /* Do not allow self-transfers */ if (src == dst) { return fail(Error.BAD_INPUT, FailureInfo.TRANSFER_NOT_ALLOWED); } /* Get the allowance, infinite for the account owner */ uint startingAllowance = 0; if (spender == src) { startingAllowance = uint(-1); } else { startingAllowance = transferAllowances[src][spender]; } /* Do the calculations, checking for {under,over}flow */ MathError mathErr; uint allowanceNew; uint srcTokensNew; uint dstTokensNew; (mathErr, allowanceNew) = subUInt(startingAllowance, tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ALLOWED); } (mathErr, srcTokensNew) = subUInt(accountTokens[src], tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ENOUGH); } (mathErr, dstTokensNew) = addUInt(accountTokens[dst], tokens); if (mathErr != MathError.NO_ERROR) { return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_TOO_MUCH); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) accountTokens[src] = srcTokensNew; accountTokens[dst] = dstTokensNew; /* Eat some of the allowance (if necessary) */ if (startingAllowance != uint(-1)) { transferAllowances[src][spender] = allowanceNew; } /* We emit a Transfer event */ emit Transfer(src, dst, tokens); // unused function // comptroller.transferVerify(address(this), src, dst, tokens); return uint(Error.NO_ERROR); } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external nonReentrant returns (bool) { return transferTokens(msg.sender, msg.sender, dst, amount) == uint(Error.NO_ERROR); } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external nonReentrant returns (bool) { return transferTokens(msg.sender, src, dst, amount) == uint(Error.NO_ERROR); } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool) { address src = msg.sender; transferAllowances[src][spender] = amount; emit Approval(src, spender, amount); return true; } /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint256) { return transferAllowances[owner][spender]; } /** * @notice Get the token balance of the `owner` * @param owner The address of the account to query * @return The number of tokens owned by `owner` */ function balanceOf(address owner) external view returns (uint256) { return accountTokens[owner]; } /** * @notice Get the underlying balance of the `owner` * @dev This also accrues interest in a transaction * @param owner The address of the account to query * @return The amount of underlying owned by `owner` */ function balanceOfUnderlying(address owner) external returns (uint) { Exp memory exchangeRate = Exp({mantissa: exchangeRateCurrent()}); (MathError mErr, uint balance) = mulScalarTruncate(exchangeRate, accountTokens[owner]); require(mErr == MathError.NO_ERROR, "balance could not be calculated"); return balance; } /** * @notice Get a snapshot of the account's balances, and the cached exchange rate * @dev This is used by comptroller to more efficiently perform liquidity checks. * @param account Address of the account to snapshot * @return (possible error, token balance, borrow balance, exchange rate mantissa) */ function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) { uint mTokenBalance = accountTokens[account]; uint borrowBalance; uint exchangeRateMantissa; MathError mErr; (mErr, borrowBalance) = borrowBalanceStoredInternal(account); if (mErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0, 0, 0); } (mErr, exchangeRateMantissa) = exchangeRateStoredInternal(); if (mErr != MathError.NO_ERROR) { return (uint(Error.MATH_ERROR), 0, 0, 0); } return (uint(Error.NO_ERROR), mTokenBalance, borrowBalance, exchangeRateMantissa); } /** * @dev Function to simply retrieve block timestamp * This exists mainly for inheriting test contracts to stub this result. */ function getBlockTimestamp() internal view returns (uint) { return block.timestamp; } /** * @notice Returns the current per-timestamp borrow interest rate for this mToken * @return The borrow interest rate per timestmp, scaled by 1e18 */ function borrowRatePerTimestamp() external view returns (uint) { return interestRateModel.getBorrowRate(getCashPrior(), totalBorrows, totalReserves); } /** * @notice Returns the current per-timestamp supply interest rate for this mToken * @return The supply interest rate per timestmp, scaled by 1e18 */ function supplyRatePerTimestamp() external view returns (uint) { return interestRateModel.getSupplyRate(getCashPrior(), totalBorrows, totalReserves, reserveFactorMantissa); } /** * @notice Returns the current total borrows plus accrued interest * @return The total borrows with interest */ function totalBorrowsCurrent() external nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return totalBorrows; } /** * @notice Accrue interest to updated borrowIndex and then calculate account's borrow balance using the updated borrowIndex * @param account The address whose balance should be calculated after updating borrowIndex * @return The calculated balance */ function borrowBalanceCurrent(address account) external nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return borrowBalanceStored(account); } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return The calculated balance */ function borrowBalanceStored(address account) public view returns (uint) { (MathError err, uint result) = borrowBalanceStoredInternal(account); require(err == MathError.NO_ERROR, "borrowBalanceStored: borrowBalanceStoredInternal failed"); return result; } /** * @notice Return the borrow balance of account based on stored data * @param account The address whose balance should be calculated * @return (error code, the calculated balance or 0 if error code is non-zero) */ function borrowBalanceStoredInternal(address account) internal view returns (MathError, uint) { /* Note: we do not assert that the market is up to date */ MathError mathErr; uint principalTimesIndex; uint result; /* Get borrowBalance and borrowIndex */ BorrowSnapshot storage borrowSnapshot = accountBorrows[account]; /* If borrowBalance = 0 then borrowIndex is likely also 0. * Rather than failing the calculation with a division by 0, we immediately return 0 in this case. */ if (borrowSnapshot.principal == 0) { return (MathError.NO_ERROR, 0); } /* Calculate new borrow balance using the interest index: * recentBorrowBalance = borrower.borrowBalance * market.borrowIndex / borrower.borrowIndex */ (mathErr, principalTimesIndex) = mulUInt(borrowSnapshot.principal, borrowIndex); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } (mathErr, result) = divUInt(principalTimesIndex, borrowSnapshot.interestIndex); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } return (MathError.NO_ERROR, result); } /** * @notice Accrue interest then return the up-to-date exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateCurrent() public nonReentrant returns (uint) { require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed"); return exchangeRateStored(); } /** * @notice Calculates the exchange rate from the underlying to the MToken * @dev This function does not accrue interest before calculating the exchange rate * @return Calculated exchange rate scaled by 1e18 */ function exchangeRateStored() public view returns (uint) { (MathError err, uint result) = exchangeRateStoredInternal(); require(err == MathError.NO_ERROR, "exchangeRateStored: exchangeRateStoredInternal failed"); return result; } /** * @notice Calculates the exchange rate from the underlying to the MToken * @dev This function does not accrue interest before calculating the exchange rate * @return (error code, calculated exchange rate scaled by 1e18) */ function exchangeRateStoredInternal() internal view returns (MathError, uint) { uint _totalSupply = totalSupply; if (_totalSupply == 0) { /* * If there are no tokens minted: * exchangeRate = initialExchangeRate */ return (MathError.NO_ERROR, initialExchangeRateMantissa); } else { /* * Otherwise: * exchangeRate = (totalCash + totalBorrows - totalReserves) / totalSupply */ uint totalCash = getCashPrior(); uint cashPlusBorrowsMinusReserves; Exp memory exchangeRate; MathError mathErr; (mathErr, cashPlusBorrowsMinusReserves) = addThenSubUInt(totalCash, totalBorrows, totalReserves); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } (mathErr, exchangeRate) = getExp(cashPlusBorrowsMinusReserves, _totalSupply); if (mathErr != MathError.NO_ERROR) { return (mathErr, 0); } return (MathError.NO_ERROR, exchangeRate.mantissa); } } /** * @notice Get cash balance of this mToken in the underlying asset * @return The quantity of underlying asset owned by this contract */ function getCash() external view returns (uint) { return getCashPrior(); } /** * @notice Applies accrued interest to total borrows and reserves * @dev This calculates interest accrued from the last checkpointed block * up to the current block and writes new checkpoint to storage. */ function accrueInterest() public returns (uint) { /* Remember the initial block timestamp */ uint currentBlockTimestamp = getBlockTimestamp(); uint accrualBlockTimestampPrior = accrualBlockTimestamp; /* Short-circuit accumulating 0 interest */ if (accrualBlockTimestampPrior == currentBlockTimestamp) { return uint(Error.NO_ERROR); } /* Read the previous values out of storage */ uint cashPrior = getCashPrior(); uint borrowsPrior = totalBorrows; uint reservesPrior = totalReserves; uint borrowIndexPrior = borrowIndex; /* Calculate the current borrow interest rate */ uint borrowRateMantissa = interestRateModel.getBorrowRate(cashPrior, borrowsPrior, reservesPrior); require(borrowRateMantissa <= borrowRateMaxMantissa, "borrow rate is absurdly high"); /* Calculate the number of blocks elapsed since the last accrual */ (MathError mathErr, uint blockDelta) = subUInt(currentBlockTimestamp, accrualBlockTimestampPrior); require(mathErr == MathError.NO_ERROR, "could not calculate block delta"); /* * Calculate the interest accumulated into borrows and reserves and the new index: * simpleInterestFactor = borrowRate * blockDelta * interestAccumulated = simpleInterestFactor * totalBorrows * totalBorrowsNew = interestAccumulated + totalBorrows * totalReservesNew = interestAccumulated * reserveFactor + totalReserves * borrowIndexNew = simpleInterestFactor * borrowIndex + borrowIndex */ Exp memory simpleInterestFactor; uint interestAccumulated; uint totalBorrowsNew; uint totalReservesNew; uint borrowIndexNew; (mathErr, simpleInterestFactor) = mulScalar(Exp({mantissa: borrowRateMantissa}), blockDelta); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, uint(mathErr)); } (mathErr, interestAccumulated) = mulScalarTruncate(simpleInterestFactor, borrowsPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, uint(mathErr)); } (mathErr, totalBorrowsNew) = addUInt(interestAccumulated, borrowsPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, uint(mathErr)); } (mathErr, totalReservesNew) = mulScalarTruncateAddUInt(Exp({mantissa: reserveFactorMantissa}), interestAccumulated, reservesPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, uint(mathErr)); } (mathErr, borrowIndexNew) = mulScalarTruncateAddUInt(simpleInterestFactor, borrowIndexPrior, borrowIndexPrior); if (mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, uint(mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ accrualBlockTimestamp = currentBlockTimestamp; borrowIndex = borrowIndexNew; totalBorrows = totalBorrowsNew; totalReserves = totalReservesNew; /* We emit an AccrueInterest event */ emit AccrueInterest(cashPrior, interestAccumulated, borrowIndexNew, totalBorrowsNew); return uint(Error.NO_ERROR); } /** * @notice Sender supplies assets into the market and receives mTokens in exchange * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param mintAmount The amount of the underlying asset to supply * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount. */ function mintInternal(uint mintAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.MINT_ACCRUE_INTEREST_FAILED), 0); } // mintFresh emits the actual Mint event if successful and logs on errors, so we don't need to return mintFresh(msg.sender, mintAmount); } struct MintLocalVars { Error err; MathError mathErr; uint exchangeRateMantissa; uint mintTokens; uint totalSupplyNew; uint accountTokensNew; uint actualMintAmount; } /** * @notice User supplies assets into the market and receives mTokens in exchange * @dev Assumes interest has already been accrued up to the current block * @param minter The address of the account which is supplying the assets * @param mintAmount The amount of the underlying asset to supply * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount. */ function mintFresh(address minter, uint mintAmount) internal returns (uint, uint) { /* Fail if mint not allowed */ uint allowed = comptroller.mintAllowed(address(this), minter, mintAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.MINT_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block timestamp equals current block timestamp */ if (accrualBlockTimestamp != getBlockTimestamp()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.MINT_FRESHNESS_CHECK), 0); } MintLocalVars memory vars; (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); if (vars.mathErr != MathError.NO_ERROR) { return (failOpaque(Error.MATH_ERROR, FailureInfo.MINT_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)), 0); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call `doTransferIn` for the minter and the mintAmount. * Note: The mToken must handle variations between ERC-20 and GLMR underlying. * `doTransferIn` reverts if anything goes wrong, since we can't be sure if * side-effects occurred. The function returns the amount actually transferred, * in case of a fee. On success, the mToken holds an additional `actualMintAmount` * of cash. */ vars.actualMintAmount = doTransferIn(minter, mintAmount); /* * We get the current exchange rate and calculate the number of mTokens to be minted: * mintTokens = actualMintAmount / exchangeRate */ (vars.mathErr, vars.mintTokens) = divScalarByExpTruncate(vars.actualMintAmount, Exp({mantissa: vars.exchangeRateMantissa})); require(vars.mathErr == MathError.NO_ERROR, "MINT_EXCHANGE_CALCULATION_FAILED"); /* * We calculate the new total supply of mTokens and minter token balance, checking for overflow: * totalSupplyNew = totalSupply + mintTokens * accountTokensNew = accountTokens[minter] + mintTokens */ (vars.mathErr, vars.totalSupplyNew) = addUInt(totalSupply, vars.mintTokens); require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED"); (vars.mathErr, vars.accountTokensNew) = addUInt(accountTokens[minter], vars.mintTokens); require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED"); /* We write previously calculated values into storage */ totalSupply = vars.totalSupplyNew; accountTokens[minter] = vars.accountTokensNew; /* We emit a Mint event, and a Transfer event */ emit Mint(minter, vars.actualMintAmount, vars.mintTokens); emit Transfer(address(this), minter, vars.mintTokens); /* We call the defense hook */ // unused function // comptroller.mintVerify(address(this), minter, vars.actualMintAmount, vars.mintTokens); return (uint(Error.NO_ERROR), vars.actualMintAmount); } /** * @notice Sender redeems mTokens in exchange for the underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemTokens The number of mTokens to redeem into underlying * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemInternal(uint redeemTokens) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED); } // redeemFresh emits redeem-specific logs on errors, so we don't need to return redeemFresh(msg.sender, redeemTokens, 0); } /** * @notice Sender redeems mTokens in exchange for a specified amount of underlying asset * @dev Accrues interest whether or not the operation succeeds, unless reverted * @param redeemAmount The amount of underlying to receive from redeeming mTokens * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemUnderlyingInternal(uint redeemAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED); } // redeemFresh emits redeem-specific logs on errors, so we don't need to return redeemFresh(msg.sender, 0, redeemAmount); } struct RedeemLocalVars { Error err; MathError mathErr; uint exchangeRateMantissa; uint redeemTokens; uint redeemAmount; uint totalSupplyNew; uint accountTokensNew; } /** * @notice User redeems mTokens in exchange for the underlying asset * @dev Assumes interest has already been accrued up to the current block * @param redeemer The address of the account which is redeeming the tokens * @param redeemTokensIn The number of mTokens to redeem into underlying (only one of redeemTokensIn or redeemAmountIn may be non-zero) * @param redeemAmountIn The number of underlying tokens to receive from redeeming mTokens (only one of redeemTokensIn or redeemAmountIn may be non-zero) * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function redeemFresh(address payable redeemer, uint redeemTokensIn, uint redeemAmountIn) internal returns (uint) { require(redeemTokensIn == 0 || redeemAmountIn == 0, "one of redeemTokensIn or redeemAmountIn must be zero"); RedeemLocalVars memory vars; /* exchangeRate = invoke Exchange Rate Stored() */ (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)); } /* If redeemTokensIn > 0: */ if (redeemTokensIn > 0) { /* * We calculate the exchange rate and the amount of underlying to be redeemed: * redeemTokens = redeemTokensIn * redeemAmount = redeemTokensIn x exchangeRateCurrent */ if (redeemTokensIn == uint(-1)) { vars.redeemTokens = accountTokens[redeemer]; } else { vars.redeemTokens = redeemTokensIn; } (vars.mathErr, vars.redeemAmount) = mulScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, uint(vars.mathErr)); } } else { /* * We get the current exchange rate and calculate the amount to be redeemed: * redeemTokens = redeemAmountIn / exchangeRate * redeemAmount = redeemAmountIn */ if (redeemAmountIn == uint(-1)) { vars.redeemTokens = accountTokens[redeemer]; (vars.mathErr, vars.redeemAmount) = mulScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, uint(vars.mathErr)); } } else { vars.redeemAmount = redeemAmountIn; (vars.mathErr, vars.redeemTokens) = divScalarByExpTruncate(redeemAmountIn, Exp({mantissa: vars.exchangeRateMantissa})); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, uint(vars.mathErr)); } } } /* Fail if redeem not allowed */ uint allowed = comptroller.redeemAllowed(address(this), redeemer, vars.redeemTokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REDEEM_COMPTROLLER_REJECTION, allowed); } /* Verify market's block timestamp equals current block timestamp */ if (accrualBlockTimestamp != getBlockTimestamp()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDEEM_FRESHNESS_CHECK); } /* * We calculate the new total supply and redeemer balance, checking for underflow: * totalSupplyNew = totalSupply - redeemTokens * accountTokensNew = accountTokens[redeemer] - redeemTokens */ (vars.mathErr, vars.totalSupplyNew) = subUInt(totalSupply, vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.accountTokensNew) = subUInt(accountTokens[redeemer], vars.redeemTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } /* Fail gracefully if protocol has insufficient cash */ if (getCashPrior() < vars.redeemAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDEEM_TRANSFER_OUT_NOT_POSSIBLE); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write previously calculated values into storage */ totalSupply = vars.totalSupplyNew; accountTokens[redeemer] = vars.accountTokensNew; /* We emit a Transfer event, and a Redeem event */ emit Transfer(redeemer, address(this), vars.redeemTokens); emit Redeem(redeemer, vars.redeemAmount, vars.redeemTokens); /* We call the defense hook */ comptroller.redeemVerify(address(this), redeemer, vars.redeemAmount, vars.redeemTokens); /* * We invoke doTransferOut for the redeemer and the redeemAmount. * Note: The mToken must handle variations between ERC-20 and GLMR underlying. * On success, the mToken has redeemAmount less of cash. * doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. */ doTransferOut(redeemer, vars.redeemAmount); return uint(Error.NO_ERROR); } /** * @notice Sender borrows assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrowInternal(uint borrowAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return fail(Error(error), FailureInfo.BORROW_ACCRUE_INTEREST_FAILED); } // borrowFresh emits borrow-specific logs on errors, so we don't need to return borrowFresh(msg.sender, borrowAmount); } struct BorrowLocalVars { MathError mathErr; uint accountBorrows; uint accountBorrowsNew; uint totalBorrowsNew; } /** * @notice Users borrow assets from the protocol to their own address * @param borrowAmount The amount of the underlying asset to borrow * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function borrowFresh(address payable borrower, uint borrowAmount) internal returns (uint) { /* Fail if borrow not allowed */ uint allowed = comptroller.borrowAllowed(address(this), borrower, borrowAmount); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.BORROW_COMPTROLLER_REJECTION, allowed); } /* Verify market's block timestamp equals current block timestamp */ if (accrualBlockTimestamp != getBlockTimestamp()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.BORROW_FRESHNESS_CHECK); } /* Fail gracefully if protocol has insufficient underlying cash */ if (getCashPrior() < borrowAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_CASH_NOT_AVAILABLE); } BorrowLocalVars memory vars; /* * We calculate the new borrower and total borrow balances, failing on overflow: * accountBorrowsNew = accountBorrows + borrowAmount * totalBorrowsNew = totalBorrows + borrowAmount */ (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.accountBorrowsNew) = addUInt(vars.accountBorrows, borrowAmount); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } (vars.mathErr, vars.totalBorrowsNew) = addUInt(totalBorrows, borrowAmount); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ accountBorrows[borrower].principal = vars.accountBorrowsNew; accountBorrows[borrower].interestIndex = borrowIndex; totalBorrows = vars.totalBorrowsNew; /* We emit a Borrow event */ emit Borrow(borrower, borrowAmount, vars.accountBorrowsNew, vars.totalBorrowsNew); /* * We invoke doTransferOut for the borrower and the borrowAmount. * Note: The mToken must handle variations between ERC-20 and GLMR underlying. * On success, the mToken borrowAmount less of cash. * doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. */ doTransferOut(borrower, borrowAmount); /* We call the defense hook */ // unused function // comptroller.borrowVerify(address(this), borrower, borrowAmount); return uint(Error.NO_ERROR); } /** * @notice Sender repays their own borrow * @param repayAmount The amount to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowInternal(uint repayAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.REPAY_BORROW_ACCRUE_INTEREST_FAILED), 0); } // repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to return repayBorrowFresh(msg.sender, msg.sender, repayAmount); } /** * @notice Sender repays a borrow belonging to borrower * @param borrower the account with the debt being payed off * @param repayAmount The amount to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowBehalfInternal(address borrower, uint repayAmount) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed return (fail(Error(error), FailureInfo.REPAY_BEHALF_ACCRUE_INTEREST_FAILED), 0); } // repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to return repayBorrowFresh(msg.sender, borrower, repayAmount); } struct RepayBorrowLocalVars { Error err; MathError mathErr; uint repayAmount; uint borrowerIndex; uint accountBorrows; uint accountBorrowsNew; uint totalBorrowsNew; uint actualRepayAmount; } /** * @notice Borrows are repaid by another user (possibly the borrower). * @param payer the account paying off the borrow * @param borrower the account with the debt being payed off * @param repayAmount the amount of undelrying tokens being returned * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function repayBorrowFresh(address payer, address borrower, uint repayAmount) internal returns (uint, uint) { /* Fail if repayBorrow not allowed */ uint allowed = comptroller.repayBorrowAllowed(address(this), payer, borrower, repayAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REPAY_BORROW_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block timestamp equals current block timestamp */ if (accrualBlockTimestamp != getBlockTimestamp()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.REPAY_BORROW_FRESHNESS_CHECK), 0); } RepayBorrowLocalVars memory vars; /* We remember the original borrowerIndex for verification purposes */ vars.borrowerIndex = accountBorrows[borrower].interestIndex; /* We fetch the amount the borrower owes, with accumulated interest */ (vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower); if (vars.mathErr != MathError.NO_ERROR) { return (failOpaque(Error.MATH_ERROR, FailureInfo.REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)), 0); } /* If repayAmount == -1, repayAmount = accountBorrows */ if (repayAmount == uint(-1)) { vars.repayAmount = vars.accountBorrows; } else { vars.repayAmount = repayAmount; } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call doTransferIn for the payer and the repayAmount * Note: The mToken must handle variations between ERC-20 and GLMR underlying. * On success, the mToken holds an additional repayAmount of cash. * doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred. * it returns the amount actually transferred, in case of a fee. */ vars.actualRepayAmount = doTransferIn(payer, vars.repayAmount); /* * We calculate the new borrower and total borrow balances, failing on underflow: * accountBorrowsNew = accountBorrows - actualRepayAmount * totalBorrowsNew = totalBorrows - actualRepayAmount */ (vars.mathErr, vars.accountBorrowsNew) = subUInt(vars.accountBorrows, vars.actualRepayAmount); require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED"); (vars.mathErr, vars.totalBorrowsNew) = subUInt(totalBorrows, vars.actualRepayAmount); require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED"); /* We write the previously calculated values into storage */ accountBorrows[borrower].principal = vars.accountBorrowsNew; accountBorrows[borrower].interestIndex = borrowIndex; totalBorrows = vars.totalBorrowsNew; /* We emit a RepayBorrow event */ emit RepayBorrow(payer, borrower, vars.actualRepayAmount, vars.accountBorrowsNew, vars.totalBorrowsNew); /* We call the defense hook */ // unused function // comptroller.repayBorrowVerify(address(this), payer, borrower, vars.actualRepayAmount, vars.borrowerIndex); return (uint(Error.NO_ERROR), vars.actualRepayAmount); } /** * @notice The sender liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this mToken to be liquidated * @param mTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function liquidateBorrowInternal(address borrower, uint repayAmount, MTokenInterface mTokenCollateral) internal nonReentrant returns (uint, uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED), 0); } error = mTokenCollateral.accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED), 0); } // liquidateBorrowFresh emits borrow-specific logs on errors, so we don't need to return liquidateBorrowFresh(msg.sender, borrower, repayAmount, mTokenCollateral); } /** * @notice The liquidator liquidates the borrowers collateral. * The collateral seized is transferred to the liquidator. * @param borrower The borrower of this mToken to be liquidated * @param liquidator The address repaying the borrow and seizing collateral * @param mTokenCollateral The market in which to seize collateral from the borrower * @param repayAmount The amount of the underlying borrowed asset to repay * @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount. */ function liquidateBorrowFresh(address liquidator, address borrower, uint repayAmount, MTokenInterface mTokenCollateral) internal returns (uint, uint) { /* Fail if liquidate not allowed */ uint allowed = comptroller.liquidateBorrowAllowed(address(this), address(mTokenCollateral), liquidator, borrower, repayAmount); if (allowed != 0) { return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_COMPTROLLER_REJECTION, allowed), 0); } /* Verify market's block timestamp equals current block timestamp */ if (accrualBlockTimestamp != getBlockTimestamp()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_FRESHNESS_CHECK), 0); } /* Verify mTokenCollateral market's block timestamp equals current block timestamp */ if (mTokenCollateral.accrualBlockTimestamp() != getBlockTimestamp()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_COLLATERAL_FRESHNESS_CHECK), 0); } /* Fail if borrower = liquidator */ if (borrower == liquidator) { return (fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_LIQUIDATOR_IS_BORROWER), 0); } /* Fail if repayAmount = 0 */ if (repayAmount == 0) { return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_ZERO), 0); } /* Fail if repayAmount = -1 */ if (repayAmount == uint(-1)) { return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX), 0); } /* Fail if repayBorrow fails */ (uint repayBorrowError, uint actualRepayAmount) = repayBorrowFresh(liquidator, borrower, repayAmount); if (repayBorrowError != uint(Error.NO_ERROR)) { return (fail(Error(repayBorrowError), FailureInfo.LIQUIDATE_REPAY_BORROW_FRESH_FAILED), 0); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We calculate the number of collateral tokens that will be seized */ (uint amountSeizeError, uint seizeTokens) = comptroller.liquidateCalculateSeizeTokens(address(this), address(mTokenCollateral), actualRepayAmount); require(amountSeizeError == uint(Error.NO_ERROR), "LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED"); /* Revert if borrower collateral token balance < seizeTokens */ require(mTokenCollateral.balanceOf(borrower) >= seizeTokens, "LIQUIDATE_SEIZE_TOO_MUCH"); // If this is also the collateral, run seizeInternal to avoid re-entrancy, otherwise make an external call uint seizeError; if (address(mTokenCollateral) == address(this)) { seizeError = seizeInternal(address(this), liquidator, borrower, seizeTokens); } else { seizeError = mTokenCollateral.seize(liquidator, borrower, seizeTokens); } /* Revert if seize tokens fails (since we cannot be sure of side effects) */ require(seizeError == uint(Error.NO_ERROR), "token seizure failed"); /* We emit a LiquidateBorrow event */ emit LiquidateBorrow(liquidator, borrower, actualRepayAmount, address(mTokenCollateral), seizeTokens); /* We call the defense hook */ // unused function // comptroller.liquidateBorrowVerify(address(this), address(mTokenCollateral), liquidator, borrower, actualRepayAmount, seizeTokens); return (uint(Error.NO_ERROR), actualRepayAmount); } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Will fail unless called by another mToken during the process of liquidation. * Its absolutely critical to use msg.sender as the borrowed mToken and not a parameter. * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of mTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seize(address liquidator, address borrower, uint seizeTokens) external nonReentrant returns (uint) { return seizeInternal(msg.sender, liquidator, borrower, seizeTokens); } struct SeizeInternalLocalVars { MathError mathErr; uint borrowerTokensNew; uint liquidatorTokensNew; uint liquidatorSeizeTokens; uint protocolSeizeTokens; uint protocolSeizeAmount; uint exchangeRateMantissa; uint totalReservesNew; uint totalSupplyNew; } /** * @notice Transfers collateral tokens (this market) to the liquidator. * @dev Called only during an in-kind liquidation, or by liquidateBorrow during the liquidation of another MToken. * Its absolutely critical to use msg.sender as the seizer mToken and not a parameter. * @param seizerToken The contract seizing the collateral (i.e. borrowed mToken) * @param liquidator The account receiving seized collateral * @param borrower The account having collateral seized * @param seizeTokens The number of mTokens to seize * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function seizeInternal(address seizerToken, address liquidator, address borrower, uint seizeTokens) internal returns (uint) { /* Fail if seize not allowed */ uint allowed = comptroller.seizeAllowed(address(this), seizerToken, liquidator, borrower, seizeTokens); if (allowed != 0) { return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, allowed); } /* Fail if borrower = liquidator */ if (borrower == liquidator) { return fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER); } SeizeInternalLocalVars memory vars; /* * We calculate the new borrower and liquidator token balances, failing on underflow/overflow: * borrowerTokensNew = accountTokens[borrower] - seizeTokens * liquidatorTokensNew = accountTokens[liquidator] + seizeTokens */ (vars.mathErr, vars.borrowerTokensNew) = subUInt(accountTokens[borrower], seizeTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, uint(vars.mathErr)); } vars.protocolSeizeTokens = mul_(seizeTokens, Exp({mantissa: protocolSeizeShareMantissa})); vars.liquidatorSeizeTokens = sub_(seizeTokens, vars.protocolSeizeTokens); (vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal(); require(vars.mathErr == MathError.NO_ERROR, "exchange rate math error"); vars.protocolSeizeAmount = mul_ScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), vars.protocolSeizeTokens); vars.totalReservesNew = add_(totalReserves, vars.protocolSeizeAmount); vars.totalSupplyNew = sub_(totalSupply, vars.protocolSeizeTokens); (vars.mathErr, vars.liquidatorTokensNew) = addUInt(accountTokens[liquidator], vars.liquidatorSeizeTokens); if (vars.mathErr != MathError.NO_ERROR) { return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, uint(vars.mathErr)); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* We write the previously calculated values into storage */ totalReserves = vars.totalReservesNew; totalSupply = vars.totalSupplyNew; accountTokens[borrower] = vars.borrowerTokensNew; accountTokens[liquidator] = vars.liquidatorTokensNew; /* Emit a Transfer event */ emit Transfer(borrower, liquidator, vars.liquidatorSeizeTokens); emit Transfer(borrower, address(this), vars.protocolSeizeTokens); emit ReservesAdded(address(this), vars.protocolSeizeAmount, vars.totalReservesNew); /* We call the defense hook */ // unused function // comptroller.seizeVerify(address(this), seizerToken, liquidator, borrower, seizeTokens); return uint(Error.NO_ERROR); } /*** Admin Functions ***/ /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint) { // Check caller = admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK); } // Save current value, if any, for inclusion in log address oldPendingAdmin = pendingAdmin; // Store pendingAdmin with value newPendingAdmin pendingAdmin = newPendingAdmin; // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin) emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() external returns (uint) { // Check caller is pendingAdmin and pendingAdmin ≠ address(0) if (msg.sender != pendingAdmin || msg.sender == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK); } // Save current values for inclusion in log address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; // Store admin with value pendingAdmin admin = pendingAdmin; // Clear the pending value pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Sets a new comptroller for the market * @dev Admin function to set a new comptroller * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setComptroller(ComptrollerInterface newComptroller) public returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_COMPTROLLER_OWNER_CHECK); } ComptrollerInterface oldComptroller = comptroller; // Ensure invoke comptroller.isComptroller() returns true require(newComptroller.isComptroller(), "marker method returned false"); // Set market's comptroller to newComptroller comptroller = newComptroller; // Emit NewComptroller(oldComptroller, newComptroller) emit NewComptroller(oldComptroller, newComptroller); return uint(Error.NO_ERROR); } /** * @notice accrues interest and sets a new reserve factor for the protocol using _setReserveFactorFresh * @dev Admin function to accrue interest and set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactor(uint newReserveFactorMantissa) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reserve factor change failed. return fail(Error(error), FailureInfo.SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED); } // _setReserveFactorFresh emits reserve-factor-specific logs on errors, so we don't need to. return _setReserveFactorFresh(newReserveFactorMantissa); } /** * @notice Sets a new reserve factor for the protocol (*requires fresh interest accrual) * @dev Admin function to set a new reserve factor * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setReserveFactorFresh(uint newReserveFactorMantissa) internal returns (uint) { // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_RESERVE_FACTOR_ADMIN_CHECK); } // Verify market's block timestamp equals current block timestamp if (accrualBlockTimestamp != getBlockTimestamp()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_RESERVE_FACTOR_FRESH_CHECK); } // Check newReserveFactor ≤ maxReserveFactor if (newReserveFactorMantissa > reserveFactorMaxMantissa) { return fail(Error.BAD_INPUT, FailureInfo.SET_RESERVE_FACTOR_BOUNDS_CHECK); } uint oldReserveFactorMantissa = reserveFactorMantissa; reserveFactorMantissa = newReserveFactorMantissa; emit NewReserveFactor(oldReserveFactorMantissa, newReserveFactorMantissa); return uint(Error.NO_ERROR); } /** * @notice Accrues interest and reduces reserves by transferring from msg.sender * @param addAmount Amount of addition to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _addReservesInternal(uint addAmount) internal nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed. return fail(Error(error), FailureInfo.ADD_RESERVES_ACCRUE_INTEREST_FAILED); } // _addReservesFresh emits reserve-addition-specific logs on errors, so we don't need to. (error, ) = _addReservesFresh(addAmount); return error; } /** * @notice Add reserves by transferring from caller * @dev Requires fresh interest accrual * @param addAmount Amount of addition to reserves * @return (uint, uint) An error code (0=success, otherwise a failure (see ErrorReporter.sol for details)) and the actual amount added, net token fees */ function _addReservesFresh(uint addAmount) internal returns (uint, uint) { // totalReserves + actualAddAmount uint totalReservesNew; uint actualAddAmount; // We fail gracefully unless market's block timestamp equals current block timestamp if (accrualBlockTimestamp != getBlockTimestamp()) { return (fail(Error.MARKET_NOT_FRESH, FailureInfo.ADD_RESERVES_FRESH_CHECK), actualAddAmount); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) /* * We call doTransferIn for the caller and the addAmount * Note: The mToken must handle variations between ERC-20 and GLMR underlying. * On success, the mToken holds an additional addAmount of cash. * doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred. * it returns the amount actually transferred, in case of a fee. */ actualAddAmount = doTransferIn(msg.sender, addAmount); totalReservesNew = totalReserves + actualAddAmount; /* Revert on overflow */ require(totalReservesNew >= totalReserves, "add reserves unexpected overflow"); // Store reserves[n+1] = reserves[n] + actualAddAmount totalReserves = totalReservesNew; /* Emit NewReserves(admin, actualAddAmount, reserves[n+1]) */ emit ReservesAdded(msg.sender, actualAddAmount, totalReservesNew); /* Return (NO_ERROR, actualAddAmount) */ return (uint(Error.NO_ERROR), actualAddAmount); } /** * @notice Accrues interest and reduces reserves by transferring to admin * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReserves(uint reduceAmount) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed. return fail(Error(error), FailureInfo.REDUCE_RESERVES_ACCRUE_INTEREST_FAILED); } // _reduceReservesFresh emits reserve-reduction-specific logs on errors, so we don't need to. return _reduceReservesFresh(reduceAmount); } /** * @notice Reduces reserves by transferring to admin * @dev Requires fresh interest accrual * @param reduceAmount Amount of reduction to reserves * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _reduceReservesFresh(uint reduceAmount) internal returns (uint) { // totalReserves - reduceAmount uint totalReservesNew; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.REDUCE_RESERVES_ADMIN_CHECK); } // We fail gracefully unless market's block timestamp equals current block timestamp if (accrualBlockTimestamp != getBlockTimestamp()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDUCE_RESERVES_FRESH_CHECK); } // Fail gracefully if protocol has insufficient underlying cash if (getCashPrior() < reduceAmount) { return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDUCE_RESERVES_CASH_NOT_AVAILABLE); } // Check reduceAmount ≤ reserves[n] (totalReserves) if (reduceAmount > totalReserves) { return fail(Error.BAD_INPUT, FailureInfo.REDUCE_RESERVES_VALIDATION); } ///////////////////////// // EFFECTS & INTERACTIONS // (No safe failures beyond this point) totalReservesNew = totalReserves - reduceAmount; // We checked reduceAmount <= totalReserves above, so this should never revert. require(totalReservesNew <= totalReserves, "reduce reserves unexpected underflow"); // Store reserves[n+1] = reserves[n] - reduceAmount totalReserves = totalReservesNew; // doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred. doTransferOut(admin, reduceAmount); emit ReservesReduced(admin, reduceAmount, totalReservesNew); return uint(Error.NO_ERROR); } /** * @notice accrues interest and updates the interest rate model using _setInterestRateModelFresh * @dev Admin function to accrue interest and update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted change of interest rate model failed return fail(Error(error), FailureInfo.SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED); } // _setInterestRateModelFresh emits interest-rate-model-update-specific logs on errors, so we don't need to. return _setInterestRateModelFresh(newInterestRateModel); } /** * @notice updates the interest rate model (*requires fresh interest accrual) * @dev Admin function to update the interest rate model * @param newInterestRateModel the new interest rate model to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setInterestRateModelFresh(InterestRateModel newInterestRateModel) internal returns (uint) { // Used to store old model for use in the event that is emitted on success InterestRateModel oldInterestRateModel; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_INTEREST_RATE_MODEL_OWNER_CHECK); } // We fail gracefully unless market's block timestamp equals current block timestamp if (accrualBlockTimestamp != getBlockTimestamp()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_INTEREST_RATE_MODEL_FRESH_CHECK); } // Track the market's current interest rate model oldInterestRateModel = interestRateModel; // Ensure invoke newInterestRateModel.isInterestRateModel() returns true require(newInterestRateModel.isInterestRateModel(), "marker method returned false"); // Set the interest rate model to newInterestRateModel interestRateModel = newInterestRateModel; // Emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel) emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel); return uint(Error.NO_ERROR); } /** * @notice accrues interest and updates the protocol seize share using _setProtocolSeizeShareFresh * @dev Admin function to accrue interest and update the protocol seize share * @param newProtocolSeizeShareMantissa the new protocol seize share to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setProtocolSeizeShare(uint newProtocolSeizeShareMantissa) external nonReentrant returns (uint) { uint error = accrueInterest(); if (error != uint(Error.NO_ERROR)) { // accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted change of protocol seize share failed return fail(Error(error), FailureInfo.SET_PROTOCOL_SEIZE_SHARE_ACCRUE_INTEREST_FAILED); } // _setProtocolSeizeShareFresh emits protocol-seize-share-update-specific logs on errors, so we don't need to. return _setProtocolSeizeShareFresh(newProtocolSeizeShareMantissa); } /** * @notice updates the protocol seize share (*requires fresh interest accrual) * @dev Admin function to update the protocol seize share * @param newProtocolSeizeShareMantissa the new protocol seize share to use * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setProtocolSeizeShareFresh(uint newProtocolSeizeShareMantissa) internal returns (uint) { // Used to store old share for use in the event that is emitted on success uint oldProtocolSeizeShareMantissa; // Check caller is admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PROTOCOL_SEIZE_SHARE_OWNER_CHECK); } // We fail gracefully unless market's block timestamp equals current block timestamp if (accrualBlockTimestamp != getBlockTimestamp()) { return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_PROTOCOL_SEIZE_SHARE_FRESH_CHECK); } // Track the market's current protocol seize share oldProtocolSeizeShareMantissa = protocolSeizeShareMantissa; // Set the protocol seize share to newProtocolSeizeShareMantissa protocolSeizeShareMantissa = newProtocolSeizeShareMantissa; // Emit NewProtocolSeizeShareMantissa(oldProtocolSeizeShareMantissa, newProtocolSeizeShareMantissa) emit NewProtocolSeizeShare(oldProtocolSeizeShareMantissa, newProtocolSeizeShareMantissa); return uint(Error.NO_ERROR); } /*** Safe Token ***/ /** * @notice Gets balance of this contract in terms of the underlying * @dev This excludes the value of the current message, if any * @return The quantity of underlying owned by this contract */ function getCashPrior() internal view returns (uint); /** * @dev Performs a transfer in, reverting upon failure. Returns the amount actually transferred to the protocol, in case of a fee. * This may revert due to insufficient balance or insufficient allowance. */ function doTransferIn(address from, uint amount) internal returns (uint); /** * @dev Performs a transfer out, ideally returning an explanatory error code upon failure tather than reverting. * If caller has not called checked protocol's balance, may revert due to insufficient cash held in the contract. * If caller has checked protocol's balance, and verified it is >= amount, this should not revert in normal conditions. */ function doTransferOut(address payable to, uint amount) internal; /*** Reentrancy Guard ***/ /** * @dev Prevents a contract from calling itself, directly or indirectly. */ modifier nonReentrant() { require(_notEntered, "re-entered"); _notEntered = false; _; _notEntered = true; // get a gas-refund post-Istanbul } }
pragma solidity 0.5.17; contract ComptrollerErrorReporter { enum Error { NO_ERROR, UNAUTHORIZED, COMPTROLLER_MISMATCH, INSUFFICIENT_SHORTFALL, INSUFFICIENT_LIQUIDITY, INVALID_CLOSE_FACTOR, INVALID_COLLATERAL_FACTOR, INVALID_LIQUIDATION_INCENTIVE, MARKET_NOT_ENTERED, // no longer possible MARKET_NOT_LISTED, MARKET_ALREADY_LISTED, MATH_ERROR, NONZERO_BORROW_BALANCE, PRICE_ERROR, REJECTION, SNAPSHOT_ERROR, TOO_MANY_ASSETS, TOO_MUCH_REPAY } enum FailureInfo { ACCEPT_ADMIN_PENDING_ADMIN_CHECK, ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK, EXIT_MARKET_BALANCE_OWED, EXIT_MARKET_REJECTION, SET_CLOSE_FACTOR_OWNER_CHECK, SET_CLOSE_FACTOR_VALIDATION, SET_COLLATERAL_FACTOR_OWNER_CHECK, SET_COLLATERAL_FACTOR_NO_EXISTS, SET_COLLATERAL_FACTOR_VALIDATION, SET_COLLATERAL_FACTOR_WITHOUT_PRICE, SET_IMPLEMENTATION_OWNER_CHECK, SET_LIQUIDATION_INCENTIVE_OWNER_CHECK, SET_LIQUIDATION_INCENTIVE_VALIDATION, SET_MAX_ASSETS_OWNER_CHECK, SET_PENDING_ADMIN_OWNER_CHECK, SET_PENDING_IMPLEMENTATION_OWNER_CHECK, SET_PRICE_ORACLE_OWNER_CHECK, SUPPORT_MARKET_EXISTS, SUPPORT_MARKET_OWNER_CHECK, SET_PAUSE_GUARDIAN_OWNER_CHECK, SET_GAS_AMOUNT_OWNER_CHECK } /** * @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary * contract-specific code that enables us to report opaque error codes from upgradeable contracts. **/ event Failure(uint error, uint info, uint detail); /** * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator */ function fail(Error err, FailureInfo info) internal returns (uint) { emit Failure(uint(err), uint(info), 0); return uint(err); } /** * @dev use this when reporting an opaque error from an upgradeable collaborator contract */ function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) { emit Failure(uint(err), uint(info), opaqueError); return uint(err); } } contract TokenErrorReporter { enum Error { NO_ERROR, UNAUTHORIZED, BAD_INPUT, COMPTROLLER_REJECTION, COMPTROLLER_CALCULATION_ERROR, INTEREST_RATE_MODEL_ERROR, INVALID_ACCOUNT_PAIR, INVALID_CLOSE_AMOUNT_REQUESTED, INVALID_COLLATERAL_FACTOR, MATH_ERROR, MARKET_NOT_FRESH, MARKET_NOT_LISTED, TOKEN_INSUFFICIENT_ALLOWANCE, TOKEN_INSUFFICIENT_BALANCE, TOKEN_INSUFFICIENT_CASH, TOKEN_TRANSFER_IN_FAILED, TOKEN_TRANSFER_OUT_FAILED } /* * Note: FailureInfo (but not Error) is kept in alphabetical order * This is because FailureInfo grows significantly faster, and * the order of Error has some meaning, while the order of FailureInfo * is entirely arbitrary. */ enum FailureInfo { ACCEPT_ADMIN_PENDING_ADMIN_CHECK, ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, ACCRUE_INTEREST_BORROW_RATE_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, BORROW_ACCRUE_INTEREST_FAILED, BORROW_CASH_NOT_AVAILABLE, BORROW_FRESHNESS_CHECK, BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, BORROW_MARKET_NOT_LISTED, BORROW_COMPTROLLER_REJECTION, LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED, LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED, LIQUIDATE_COLLATERAL_FRESHNESS_CHECK, LIQUIDATE_COMPTROLLER_REJECTION, LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED, LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX, LIQUIDATE_CLOSE_AMOUNT_IS_ZERO, LIQUIDATE_FRESHNESS_CHECK, LIQUIDATE_LIQUIDATOR_IS_BORROWER, LIQUIDATE_REPAY_BORROW_FRESH_FAILED, LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER, LIQUIDATE_SEIZE_TOO_MUCH, MINT_ACCRUE_INTEREST_FAILED, MINT_COMPTROLLER_REJECTION, MINT_EXCHANGE_CALCULATION_FAILED, MINT_EXCHANGE_RATE_READ_FAILED, MINT_FRESHNESS_CHECK, MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, MINT_TRANSFER_IN_FAILED, MINT_TRANSFER_IN_NOT_POSSIBLE, REDEEM_ACCRUE_INTEREST_FAILED, REDEEM_COMPTROLLER_REJECTION, REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, REDEEM_EXCHANGE_RATE_READ_FAILED, REDEEM_FRESHNESS_CHECK, REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, REDEEM_TRANSFER_OUT_NOT_POSSIBLE, REDUCE_RESERVES_ACCRUE_INTEREST_FAILED, REDUCE_RESERVES_ADMIN_CHECK, REDUCE_RESERVES_CASH_NOT_AVAILABLE, REDUCE_RESERVES_FRESH_CHECK, REDUCE_RESERVES_VALIDATION, REPAY_BEHALF_ACCRUE_INTEREST_FAILED, REPAY_BORROW_ACCRUE_INTEREST_FAILED, REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, REPAY_BORROW_COMPTROLLER_REJECTION, REPAY_BORROW_FRESHNESS_CHECK, REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE, SET_COLLATERAL_FACTOR_OWNER_CHECK, SET_COLLATERAL_FACTOR_VALIDATION, SET_COMPTROLLER_OWNER_CHECK, SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED, SET_INTEREST_RATE_MODEL_FRESH_CHECK, SET_INTEREST_RATE_MODEL_OWNER_CHECK, SET_MAX_ASSETS_OWNER_CHECK, SET_ORACLE_MARKET_NOT_LISTED, SET_PENDING_ADMIN_OWNER_CHECK, SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED, SET_RESERVE_FACTOR_ADMIN_CHECK, SET_RESERVE_FACTOR_FRESH_CHECK, SET_RESERVE_FACTOR_BOUNDS_CHECK, TRANSFER_COMPTROLLER_REJECTION, TRANSFER_NOT_ALLOWED, TRANSFER_NOT_ENOUGH, TRANSFER_TOO_MUCH, ADD_RESERVES_ACCRUE_INTEREST_FAILED, ADD_RESERVES_FRESH_CHECK, ADD_RESERVES_TRANSFER_IN_NOT_POSSIBLE, SET_PROTOCOL_SEIZE_SHARE_ACCRUE_INTEREST_FAILED, SET_PROTOCOL_SEIZE_SHARE_OWNER_CHECK, SET_PROTOCOL_SEIZE_SHARE_FRESH_CHECK } /** * @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary * contract-specific code that enables us to report opaque error codes from upgradeable contracts. **/ event Failure(uint error, uint info, uint detail); /** * @dev use this when reporting a known error from the money market or a non-upgradeable collaborator */ function fail(Error err, FailureInfo info) internal returns (uint) { emit Failure(uint(err), uint(info), 0); return uint(err); } /** * @dev use this when reporting an opaque error from an upgradeable collaborator contract */ function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) { emit Failure(uint(err), uint(info), opaqueError); return uint(err); } }
pragma solidity 0.5.17; import "./MToken.sol"; contract PriceOracle { /// @notice Indicator that this is a PriceOracle contract (for inspection) bool public constant isPriceOracle = true; /** * @notice Get the underlying price of a mToken asset * @param mToken The mToken to get the underlying price of * @return The underlying asset price mantissa (scaled by 1e18). * Zero means the price is unavailable. */ function getUnderlyingPrice(MToken mToken) external view returns (uint); }
pragma solidity 0.5.17; contract ComptrollerInterface { /// @notice Indicator that this is a Comptroller contract (for inspection) bool public constant isComptroller = true; /// @notice The amount of gas to use when making a native asset transfer. uint16 public gasAmount; /*** Assets You Are In ***/ function enterMarkets(address[] calldata mTokens) external returns (uint[] memory); function exitMarket(address mToken) external returns (uint); /*** Policy Hooks ***/ function mintAllowed(address mToken, address minter, uint mintAmount) external returns (uint); function mintVerify(address mToken, address minter, uint mintAmount, uint mintTokens) external; function redeemAllowed(address mToken, address redeemer, uint redeemTokens) external returns (uint); function redeemVerify(address mToken, address redeemer, uint redeemAmount, uint redeemTokens) external; function borrowAllowed(address mToken, address borrower, uint borrowAmount) external returns (uint); function borrowVerify(address mToken, address borrower, uint borrowAmount) external; function repayBorrowAllowed( address mToken, address payer, address borrower, uint repayAmount) external returns (uint); function repayBorrowVerify( address mToken, address payer, address borrower, uint repayAmount, uint borrowerIndex) external; function liquidateBorrowAllowed( address mTokenBorrowed, address mTokenCollateral, address liquidator, address borrower, uint repayAmount) external returns (uint); function liquidateBorrowVerify( address mTokenBorrowed, address mTokenCollateral, address liquidator, address borrower, uint repayAmount, uint seizeTokens) external; function seizeAllowed( address mTokenCollateral, address mTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external returns (uint); function seizeVerify( address mTokenCollateral, address mTokenBorrowed, address liquidator, address borrower, uint seizeTokens) external; function transferAllowed(address mToken, address src, address dst, uint transferTokens) external returns (uint); function transferVerify(address mToken, address src, address dst, uint transferTokens) external; /*** Liquidity/Liquidation Calculations ***/ function liquidateCalculateSeizeTokens( address mTokenBorrowed, address mTokenCollateral, uint repayAmount) external view returns (uint, uint); }
pragma solidity 0.5.17; import "./MToken.sol"; import "./PriceOracle.sol"; contract UnitrollerAdminStorage { /** * @notice Administrator for this contract */ address public admin; /** * @notice Pending administrator for this contract */ address public pendingAdmin; /** * @notice Active brains of Unitroller */ address public comptrollerImplementation; /** * @notice Pending brains of Unitroller */ address public pendingComptrollerImplementation; } contract ComptrollerVXStorage is UnitrollerAdminStorage { /** * @notice Oracle which gives the price of any given asset */ PriceOracle public oracle; /** * @notice Multiplier used to calculate the maximum repayAmount when liquidating a borrow */ uint public closeFactorMantissa; /** * @notice Multiplier representing the discount on collateral that a liquidator receives */ uint public liquidationIncentiveMantissa; /** * @notice Max number of assets a single account can participate in (borrow or use as collateral) */ uint public maxAssets; /** * @notice Per-account mapping of "assets you are in", capped by maxAssets */ mapping(address => MToken[]) public accountAssets; struct Market { /// @notice Whether or not this market is listed bool isListed; /** * @notice Multiplier representing the most one can borrow against their collateral in this market. * For instance, 0.9 to allow borrowing 90% of collateral value. * Must be between 0 and 1, and stored as a mantissa. */ uint collateralFactorMantissa; /// @notice Per-market mapping of "accounts in this asset" mapping(address => bool) accountMembership; /// @notice Whether or not this market receives WELL bool isWelled; } /** * @notice Official mapping of mTokens -> Market metadata * @dev Used e.g. to determine if a market is supported */ mapping(address => Market) public markets; /** * @notice The Pause Guardian can pause certain actions as a safety mechanism. * Actions which allow users to remove their own assets cannot be paused. * Liquidation / seizing / transfer can only be paused globally, not by market. */ address public pauseGuardian; bool public _mintGuardianPaused; bool public _borrowGuardianPaused; bool public transferGuardianPaused; bool public seizeGuardianPaused; mapping(address => bool) public mintGuardianPaused; mapping(address => bool) public borrowGuardianPaused; /// @notice A list of all markets MToken[] public allMarkets; // @notice The borrowCapGuardian can set borrowCaps to any number for any market. Lowering the borrow cap could disable borrowing on the given market. address public borrowCapGuardian; // @notice Borrow caps enforced by borrowAllowed for each mToken address. Defaults to zero which corresponds to unlimited borrowing. mapping(address => uint) public borrowCaps; struct RewardMarketState { /// @notice The market's last updated rewardBorrowIndex or rewardSupplyIndex uint224 index; /// @notice The block timestamp the index was last updated at uint32 timestamp; } /// @notice The rate at which the flywheel distributes reward, per timestamp mapping(uint8 => uint) rewardRate; /// @notice The portion of supply reward rate that each market currently receives mapping(uint8 => mapping(address => uint)) public supplyRewardSpeeds; /// @notice The portion of borrow reward rate that each market currently receives mapping(uint8 => mapping(address => uint)) public borrowRewardSpeeds; /// @notice The WELL/GLMR market supply state for each market mapping(uint8 => mapping(address => RewardMarketState)) public rewardSupplyState; /// @notice The WELL/GLMR market borrow state for each market mapping(uint8 =>mapping(address => RewardMarketState)) public rewardBorrowState; /// @notice The WELL/GLMR borrow index for each market for each supplier as of the last time they accrued reward mapping(uint8 => mapping(address => mapping(address => uint))) public rewardSupplierIndex; /// @notice The WELL/GLMR borrow index for each market for each borrower as of the last time they accrued reward mapping(uint8 => mapping(address => mapping(address => uint))) public rewardBorrowerIndex; /// @notice The WELL/GLMR accrued but not yet transferred to each user mapping(uint8 => mapping(address => uint)) public rewardAccrued; /// @notice WELL token contract address address public wellAddress; /// @notice Reentrant status, 0: not entered, 1: entered uint256 internal _locked; }
pragma solidity 0.5.17; import "./ErrorReporter.sol"; import "./ComptrollerStorage.sol"; /** * @title ComptrollerCore * @dev Storage for the comptroller is at this address, while execution is delegated to the `comptrollerImplementation`. * MTokens should reference this contract as their comptroller. */ contract Unitroller is UnitrollerAdminStorage, ComptrollerErrorReporter { /** * @notice Emitted when pendingComptrollerImplementation is changed */ event NewPendingImplementation(address oldPendingImplementation, address newPendingImplementation); /** * @notice Emitted when pendingComptrollerImplementation is accepted, which means comptroller implementation is updated */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Emitted when pendingAdmin is changed */ event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); /** * @notice Emitted when pendingAdmin is accepted, which means admin is updated */ event NewAdmin(address oldAdmin, address newAdmin); constructor() public { // Set admin to caller admin = msg.sender; } /*** Admin Functions ***/ function _setPendingImplementation(address newPendingImplementation) public returns (uint) { if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_IMPLEMENTATION_OWNER_CHECK); } address oldPendingImplementation = pendingComptrollerImplementation; pendingComptrollerImplementation = newPendingImplementation; emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation); return uint(Error.NO_ERROR); } /** * @notice Accepts new implementation of comptroller. msg.sender must be pendingImplementation * @dev Admin function for new implementation to accept it's role as implementation * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptImplementation() public returns (uint) { // Check caller is pendingImplementation and pendingImplementation ≠ address(0) if (msg.sender != pendingComptrollerImplementation || pendingComptrollerImplementation == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK); } // Save current values for inclusion in log address oldImplementation = comptrollerImplementation; address oldPendingImplementation = pendingComptrollerImplementation; comptrollerImplementation = pendingComptrollerImplementation; pendingComptrollerImplementation = address(0); emit NewImplementation(oldImplementation, comptrollerImplementation); emit NewPendingImplementation(oldPendingImplementation, pendingComptrollerImplementation); return uint(Error.NO_ERROR); } /** * @notice Begins transfer of admin rights. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @dev Admin function to begin change of admin. The newPendingAdmin must call `_acceptAdmin` to finalize the transfer. * @param newPendingAdmin New pending admin. * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _setPendingAdmin(address newPendingAdmin) public returns (uint) { // Check caller = admin if (msg.sender != admin) { return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_CHECK); } // Save current value, if any, for inclusion in log address oldPendingAdmin = pendingAdmin; // Store pendingAdmin with value newPendingAdmin pendingAdmin = newPendingAdmin; // Emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin) emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin); return uint(Error.NO_ERROR); } /** * @notice Accepts transfer of admin rights. msg.sender must be pendingAdmin * @dev Admin function for pending admin to accept role and update admin * @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details) */ function _acceptAdmin() public returns (uint) { // Check caller is pendingAdmin and pendingAdmin ≠ address(0) if (msg.sender != pendingAdmin || msg.sender == address(0)) { return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_ADMIN_PENDING_ADMIN_CHECK); } // Save current values for inclusion in log address oldAdmin = admin; address oldPendingAdmin = pendingAdmin; // Store admin with value pendingAdmin admin = pendingAdmin; // Clear the pending value pendingAdmin = address(0); emit NewAdmin(oldAdmin, admin); emit NewPendingAdmin(oldPendingAdmin, pendingAdmin); return uint(Error.NO_ERROR); } /** * @dev Delegates execution to an implementation contract. * It returns to the external caller whatever the implementation returns * or forwards reverts. */ function () payable external { // delegate all other functions to current implementation (bool success, ) = comptrollerImplementation.delegatecall(msg.data); assembly { let free_mem_ptr := mload(0x40) returndatacopy(free_mem_ptr, 0, returndatasize) switch success case 0 { revert(free_mem_ptr, returndatasize) } default { return(free_mem_ptr, returndatasize) } } } }
pragma solidity ^0.5.16; pragma experimental ABIEncoderV2; contract Well { /// @notice EIP-20 token name for this token string public constant name = "WELL"; /// @notice EIP-20 token symbol for this token string public constant symbol = "WELL"; /// @notice EIP-20 token decimals for this token uint8 public constant decimals = 18; /// @notice Total number of tokens in circulation uint public constant totalSupply = 5_000_000_000e18; /// @notice Allowance amounts on behalf of others mapping (address => mapping (address => uint96)) internal allowances; /// @notice Official record of token balances for each account mapping (address => uint96) internal balances; /// @notice A record of each accounts delegate mapping (address => address) public delegates; /// @notice A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint96 votes; } /// @notice A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @notice The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @notice The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @notice The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @notice The EIP-712 typehash for the permit struct used by the contract bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"); /// @notice A record of states for signing / validating signatures mapping (address => uint) public nonces; /// @notice An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @notice An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /// @notice The standard EIP-20 transfer event event Transfer(address indexed from, address indexed to, uint256 amount); /// @notice The standard EIP-20 approval event event Approval(address indexed owner, address indexed spender, uint256 amount); /** * @notice Construct a new WELL token * @param account The initial account to grant all the tokens */ constructor(address account) public { balances[account] = uint96(totalSupply); emit Transfer(address(0), account, totalSupply); } /** * @notice Get the number of tokens `spender` is approved to spend on behalf of `account` * @param account The address of the account holding the funds * @param spender The address of the account spending the funds * @return The number of tokens approved */ function allowance(address account, address spender) external view returns (uint) { return allowances[account][spender]; } /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param rawAmount The number of tokens that are approved (2^256-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint rawAmount) external returns (bool) { uint96 amount; if (rawAmount == uint(-1)) { amount = uint96(-1); } else { amount = safe96(rawAmount, "Well::approve: amount exceeds 96 bits"); } allowances[msg.sender][spender] = amount; emit Approval(msg.sender, spender, amount); return true; } /** * @notice Triggers an approval from owner to spends * @param owner The address to approve from * @param spender The address to be approved * @param rawAmount The number of tokens that are approved (2^256-1 means infinite) * @param deadline The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function permit(address owner, address spender, uint rawAmount, uint deadline, uint8 v, bytes32 r, bytes32 s) external { uint96 amount; if (rawAmount == uint(-1)) { amount = uint96(-1); } else { amount = safe96(rawAmount, "Well::permit: amount exceeds 96 bits"); } bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this))); bytes32 structHash = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, rawAmount, nonces[owner]++, deadline)); bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "Well::permit: invalid signature"); require(signatory == owner, "Well::permit: unauthorized"); require(now <= deadline, "Well::permit: signature expired"); allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @notice Get the number of tokens held by the `account` * @param account The address of the account to get the balance of * @return The number of tokens held */ function balanceOf(address account) external view returns (uint) { return balances[account]; } /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint rawAmount) external returns (bool) { uint96 amount = safe96(rawAmount, "Well::transfer: amount exceeds 96 bits"); _transferTokens(msg.sender, dst, amount); return true; } /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param rawAmount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint rawAmount) external returns (bool) { address spender = msg.sender; uint96 spenderAllowance = allowances[src][spender]; uint96 amount = safe96(rawAmount, "Well::approve: amount exceeds 96 bits"); if (spender != src && spenderAllowance != uint96(-1)) { uint96 newAllowance = sub96(spenderAllowance, amount, "Well::transferFrom: transfer amount exceeds spender allowance"); allowances[src][spender] = newAllowance; emit Approval(src, spender, newAllowance); } _transferTokens(src, dst, amount); return true; } /** * @notice Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) public { return _delegate(msg.sender, delegatee); } /** * @notice Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public { bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this))); bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry)); bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "Well::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "Well::delegateBySig: invalid nonce"); require(now <= expiry, "Well::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @notice Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint96) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @notice Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) public view returns (uint96) { require(blockNumber < block.number, "Well::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = delegates[delegator]; uint96 delegatorBalance = balances[delegator]; delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _transferTokens(address src, address dst, uint96 amount) internal { require(src != address(0), "Well::_transferTokens: cannot transfer from the zero address"); require(dst != address(0), "Well::_transferTokens: cannot transfer to the zero address"); balances[src] = sub96(balances[src], amount, "Well::_transferTokens: transfer amount exceeds balance"); balances[dst] = add96(balances[dst], amount, "Well::_transferTokens: transfer amount overflows"); emit Transfer(src, dst, amount); _moveDelegates(delegates[src], delegates[dst], amount); } function _moveDelegates(address srcRep, address dstRep, uint96 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { uint32 srcRepNum = numCheckpoints[srcRep]; uint96 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint96 srcRepNew = sub96(srcRepOld, amount, "Well::_moveVotes: vote amount underflows"); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { uint32 dstRepNum = numCheckpoints[dstRep]; uint96 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint96 dstRepNew = add96(dstRepOld, amount, "Well::_moveVotes: vote amount overflows"); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint96 oldVotes, uint96 newVotes) internal { uint32 blockNumber = safe32(block.number, "Well::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function safe96(uint n, string memory errorMessage) internal pure returns (uint96) { require(n < 2**96, errorMessage); return uint96(n); } function add96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { uint96 c = a + b; require(c >= a, errorMessage); return c; } function sub96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) { require(b <= a, errorMessage); return a - b; } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } }
pragma solidity 0.5.17; import "./ComptrollerInterface.sol"; import "./InterestRateModel.sol"; import "./EIP20NonStandardInterface.sol"; contract MTokenStorage { /** * @dev Guard variable for re-entrancy checks */ bool internal _notEntered; /** * @notice EIP-20 token name for this token */ string public name; /** * @notice EIP-20 token symbol for this token */ string public symbol; /** * @notice EIP-20 token decimals for this token */ uint8 public decimals; /** * @notice Maximum borrow rate that can ever be applied (.0005% / block) */ uint internal constant borrowRateMaxMantissa = 0.0005e16; /** * @notice Maximum fraction of interest that can be set aside for reserves */ uint internal constant reserveFactorMaxMantissa = 1e18; /** * @notice Administrator for this contract */ address payable public admin; /** * @notice Pending administrator for this contract */ address payable public pendingAdmin; /** * @notice Contract which oversees inter-mToken operations */ ComptrollerInterface public comptroller; /** * @notice Model which tells what the current interest rate should be */ InterestRateModel public interestRateModel; /** * @notice Initial exchange rate used when minting the first MTokens (used when totalSupply = 0) */ uint internal initialExchangeRateMantissa; /** * @notice Fraction of interest currently set aside for reserves */ uint public reserveFactorMantissa; /** * @notice Block number that interest was last accrued at */ uint public accrualBlockTimestamp; /** * @notice Accumulator of the total earned interest rate since the opening of the market */ uint public borrowIndex; /** * @notice Total amount of outstanding borrows of the underlying in this market */ uint public totalBorrows; /** * @notice Total amount of reserves of the underlying held in this market */ uint public totalReserves; /** * @notice Total number of tokens in circulation */ uint public totalSupply; /** * @notice Official record of token balances for each account */ mapping (address => uint) internal accountTokens; /** * @notice Approved token transfer amounts on behalf of others */ mapping (address => mapping (address => uint)) internal transferAllowances; /** * @notice Container for borrow balance information * @member principal Total balance (with accrued interest), after applying the most recent balance-changing action * @member interestIndex Global borrowIndex as of the most recent balance-changing action */ struct BorrowSnapshot { uint principal; uint interestIndex; } /** * @notice Mapping of account addresses to outstanding borrow balances */ mapping(address => BorrowSnapshot) internal accountBorrows; /** * @notice Share of seized collateral that is added to reserves */ uint public protocolSeizeShareMantissa; } contract MTokenInterface is MTokenStorage { /** * @notice Indicator that this is a MToken contract (for inspection) */ bool public constant isMToken = true; /*** Market Events ***/ /** * @notice Event emitted when interest is accrued */ event AccrueInterest(uint cashPrior, uint interestAccumulated, uint borrowIndex, uint totalBorrows); /** * @notice Event emitted when tokens are minted */ event Mint(address minter, uint mintAmount, uint mintTokens); /** * @notice Event emitted when tokens are redeemed */ event Redeem(address redeemer, uint redeemAmount, uint redeemTokens); /** * @notice Event emitted when underlying is borrowed */ event Borrow(address borrower, uint borrowAmount, uint accountBorrows, uint totalBorrows); /** * @notice Event emitted when a borrow is repaid */ event RepayBorrow(address payer, address borrower, uint repayAmount, uint accountBorrows, uint totalBorrows); /** * @notice Event emitted when a borrow is liquidated */ event LiquidateBorrow(address liquidator, address borrower, uint repayAmount, address mTokenCollateral, uint seizeTokens); /*** Admin Events ***/ /** * @notice Event emitted when pendingAdmin is changed */ event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin); /** * @notice Event emitted when pendingAdmin is accepted, which means admin is updated */ event NewAdmin(address oldAdmin, address newAdmin); /** * @notice Event emitted when comptroller is changed */ event NewComptroller(ComptrollerInterface oldComptroller, ComptrollerInterface newComptroller); /** * @notice Event emitted when interestRateModel is changed */ event NewMarketInterestRateModel(InterestRateModel oldInterestRateModel, InterestRateModel newInterestRateModel); /** * @notice Event emitted when the reserve factor is changed */ event NewReserveFactor(uint oldReserveFactorMantissa, uint newReserveFactorMantissa); /** * @notice Event emitted when the protocol seize share is changed */ event NewProtocolSeizeShare(uint oldProtocolSeizeShareMantissa, uint newProtocolSeizeShareMantissa); /** * @notice Event emitted when the reserves are added */ event ReservesAdded(address benefactor, uint addAmount, uint newTotalReserves); /** * @notice Event emitted when the reserves are reduced */ event ReservesReduced(address admin, uint reduceAmount, uint newTotalReserves); /** * @notice EIP20 Transfer event */ event Transfer(address indexed from, address indexed to, uint amount); /** * @notice EIP20 Approval event */ event Approval(address indexed owner, address indexed spender, uint amount); /** * @notice Failure event */ event Failure(uint error, uint info, uint detail); /*** User Interface ***/ function transfer(address dst, uint amount) external returns (bool); function transferFrom(address src, address dst, uint amount) external returns (bool); function approve(address spender, uint amount) external returns (bool); function allowance(address owner, address spender) external view returns (uint); function balanceOf(address owner) external view returns (uint); function balanceOfUnderlying(address owner) external returns (uint); function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint); function borrowRatePerTimestamp() external view returns (uint); function supplyRatePerTimestamp() external view returns (uint); function totalBorrowsCurrent() external returns (uint); function borrowBalanceCurrent(address account) external returns (uint); function borrowBalanceStored(address account) public view returns (uint); function exchangeRateCurrent() public returns (uint); function exchangeRateStored() public view returns (uint); function getCash() external view returns (uint); function accrueInterest() public returns (uint); function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint); /*** Admin Functions ***/ function _setPendingAdmin(address payable newPendingAdmin) external returns (uint); function _acceptAdmin() external returns (uint); function _setComptroller(ComptrollerInterface newComptroller) public returns (uint); function _setReserveFactor(uint newReserveFactorMantissa) external returns (uint); function _reduceReserves(uint reduceAmount) external returns (uint); function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint); function _setProtocolSeizeShare(uint newProtocolSeizeShareMantissa) external returns (uint); } contract MErc20Storage { /** * @notice Underlying asset for this MToken */ address public underlying; } contract MErc20Interface is MErc20Storage { /*** User Interface ***/ function mint(uint mintAmount) external returns (uint); function redeem(uint redeemTokens) external returns (uint); function redeemUnderlying(uint redeemAmount) 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); function liquidateBorrow(address borrower, uint repayAmount, MTokenInterface mTokenCollateral) external returns (uint); function sweepToken(EIP20NonStandardInterface token) external; /*** Admin Functions ***/ function _addReserves(uint addAmount) external returns (uint); } contract MDelegationStorage { /** * @notice Implementation address for this contract */ address public implementation; } contract MDelegatorInterface is MDelegationStorage { /** * @notice Emitted when implementation is changed */ event NewImplementation(address oldImplementation, address newImplementation); /** * @notice Called by the admin to update the implementation of the delegator * @param implementation_ The address of the new implementation for delegation * @param allowResign Flag to indicate whether to call _resignImplementation on the old implementation * @param becomeImplementationData The encoded bytes data to be passed to _becomeImplementation */ function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public; } contract MDelegateInterface is MDelegationStorage { /** * @notice Called by the delegator on a delegate to initialize it for duty * @dev Should revert if any issues arise which make it unfit for delegation * @param data The encoded bytes data for any initialization */ function _becomeImplementation(bytes memory data) public; /** * @notice Called by the delegator on a delegate to forfeit its responsibility */ function _resignImplementation() public; }
pragma solidity 0.5.17; import "./CarefulMath.sol"; import "./ExponentialNoError.sol"; /** * @title Exponential module for storing fixed-precision decimals * @author Moonwell * @dev Legacy contract for compatibility reasons with existing contracts that still use MathError * @notice Exp is a struct which stores decimals with a fixed precision of 18 decimal places. * Thus, if we wanted to store the 5.1, mantissa would store 5.1e18. That is: * `Exp({mantissa: 5100000000000000000})`. */ contract Exponential is CarefulMath, ExponentialNoError { /** * @dev Creates an exponential from numerator and denominator values. * Note: Returns an error if (`num` * 10e18) > MAX_INT, * or if `denom` is zero. */ function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledNumerator) = mulUInt(num, expScale); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } (MathError err1, uint rational) = divUInt(scaledNumerator, denom); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: rational})); } /** * @dev Adds two exponentials, returning a new exponential. */ function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = addUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Subtracts two exponentials, returning a new exponential. */ function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError error, uint result) = subUInt(a.mantissa, b.mantissa); return (error, Exp({mantissa: result})); } /** * @dev Multiply an Exp by a scalar, returning a new Exp. */ function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa})); } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(product)); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) { (MathError err, Exp memory product) = mulScalar(a, scalar); if (err != MathError.NO_ERROR) { return (err, 0); } return addUInt(truncate(product), addend); } /** * @dev Divide an Exp by a scalar, returning a new Exp. */ function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) { (MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa})); } /** * @dev Divide a scalar by an Exp, returning a new Exp. */ function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) { /* We are doing this as: getExp(mulUInt(expScale, scalar), divisor.mantissa) How it works: Exp = a / b; Scalar = s; `s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale` */ (MathError err0, uint numerator) = mulUInt(expScale, scalar); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } return getExp(numerator, divisor.mantissa); } /** * @dev Divide a scalar by an Exp, then truncate to return an unsigned integer. */ function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) { (MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor); if (err != MathError.NO_ERROR) { return (err, 0); } return (MathError.NO_ERROR, truncate(fraction)); } /** * @dev Multiplies two exponentials, returning a new exponential. */ function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { (MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa); if (err0 != MathError.NO_ERROR) { return (err0, Exp({mantissa: 0})); } // We add half the scale before dividing so that we get rounding instead of truncation. // See "Listing 6" and text above it at https://accu.org/index.php/journals/1717 // Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18. (MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct); if (err1 != MathError.NO_ERROR) { return (err1, Exp({mantissa: 0})); } (MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale); // The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero. assert(err2 == MathError.NO_ERROR); return (MathError.NO_ERROR, Exp({mantissa: product})); } /** * @dev Multiplies two exponentials given their mantissas, returning a new exponential. */ function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) { return mulExp(Exp({mantissa: a}), Exp({mantissa: b})); } /** * @dev Multiplies three exponentials, returning a new exponential. */ function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) { (MathError err, Exp memory ab) = mulExp(a, b); if (err != MathError.NO_ERROR) { return (err, ab); } return mulExp(ab, c); } /** * @dev Divides two exponentials, returning a new exponential. * (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b, * which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa) */ function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) { return getExp(a.mantissa, b.mantissa); } }
pragma solidity 0.5.17; /** * @title ERC 20 Token Standard Interface * https://eips.ethereum.org/EIPS/eip-20 */ interface EIP20Interface { function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); /** * @notice Get the total number of tokens in circulation * @return The supply of tokens */ function totalSupply() external view returns (uint256); /** * @notice Gets the balance of the specified address * @param owner The address from which the balance will be retrieved * @return The balance */ function balanceOf(address owner) external view returns (uint256 balance); /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transfer(address dst, uint256 amount) external returns (bool success); /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer * @return Whether or not the transfer succeeded */ function transferFrom(address src, address dst, uint256 amount) external returns (bool success); /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved (-1 means infinite) * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool success); /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent (-1 means infinite) */ function allowance(address owner, address spender) external view returns (uint256 remaining); event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); }
pragma solidity 0.5.17; /** * @title Moonwell's InterestRateModel Interface * @author Moonwell */ contract InterestRateModel { /// @notice Indicator that this is an InterestRateModel contract (for inspection) bool public constant isInterestRateModel = true; /** * @notice Calculates the current borrow interest rate per timestmp * @param cash The total amount of cash the market has * @param borrows The total amount of borrows the market has outstanding * @param reserves The total amount of reserves the market has * @return The borrow rate per timestmp (as a percentage, and scaled by 1e18) */ function getBorrowRate(uint cash, uint borrows, uint reserves) external view returns (uint); /** * @notice Calculates the current supply interest rate per timestmp * @param cash The total amount of cash the market has * @param borrows The total amount of borrows the market has outstanding * @param reserves The total amount of reserves the market has * @param reserveFactorMantissa The current reserve factor the market has * @return The supply rate per timestmp (as a percentage, and scaled by 1e18) */ function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) external view returns (uint); }
pragma solidity 0.5.17; /** * @title EIP20NonStandardInterface * @dev Version of ERC20 with no return values for `transfer` and `transferFrom` * See https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca */ interface EIP20NonStandardInterface { /** * @notice Get the total number of tokens in circulation * @return The supply of tokens */ function totalSupply() external view returns (uint256); /** * @notice Gets the balance of the specified address * @param owner The address from which the balance will be retrieved * @return The balance */ function balanceOf(address owner) external view returns (uint256 balance); /// /// !!!!!!!!!!!!!! /// !!! NOTICE !!! `transfer` does not return a value, in violation of the ERC-20 specification /// !!!!!!!!!!!!!! /// /** * @notice Transfer `amount` tokens from `msg.sender` to `dst` * @param dst The address of the destination account * @param amount The number of tokens to transfer */ function transfer(address dst, uint256 amount) external; /// /// !!!!!!!!!!!!!! /// !!! NOTICE !!! `transferFrom` does not return a value, in violation of the ERC-20 specification /// !!!!!!!!!!!!!! /// /** * @notice Transfer `amount` tokens from `src` to `dst` * @param src The address of the source account * @param dst The address of the destination account * @param amount The number of tokens to transfer */ function transferFrom(address src, address dst, uint256 amount) external; /** * @notice Approve `spender` to transfer up to `amount` from `src` * @dev This will overwrite the approval amount for `spender` * and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve) * @param spender The address of the account which may transfer tokens * @param amount The number of tokens that are approved * @return Whether or not the approval succeeded */ function approve(address spender, uint256 amount) external returns (bool success); /** * @notice Get the current allowance from `owner` for `spender` * @param owner The address of the account which owns the tokens to be spent * @param spender The address of the account which may transfer tokens * @return The number of tokens allowed to be spent */ function allowance(address owner, address spender) external view returns (uint256 remaining); event Transfer(address indexed from, address indexed to, uint256 amount); event Approval(address indexed owner, address indexed spender, uint256 amount); }
pragma solidity 0.5.17; /** * @title Careful Math * @author Moonwell * @notice Derived from OpenZeppelin's SafeMath library * https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/math/SafeMath.sol */ contract CarefulMath { /** * @dev Possible error codes that we can return */ enum MathError { NO_ERROR, DIVISION_BY_ZERO, INTEGER_OVERFLOW, INTEGER_UNDERFLOW } /** * @dev Multiplies two numbers, returns an error on overflow. */ function mulUInt(uint a, uint b) internal pure returns (MathError, uint) { if (a == 0) { return (MathError.NO_ERROR, 0); } uint c = a * b; if (c / a != b) { return (MathError.INTEGER_OVERFLOW, 0); } else { return (MathError.NO_ERROR, c); } } /** * @dev Integer division of two numbers, truncating the quotient. */ function divUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b == 0) { return (MathError.DIVISION_BY_ZERO, 0); } return (MathError.NO_ERROR, a / b); } /** * @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend). */ function subUInt(uint a, uint b) internal pure returns (MathError, uint) { if (b <= a) { return (MathError.NO_ERROR, a - b); } else { return (MathError.INTEGER_UNDERFLOW, 0); } } /** * @dev Adds two numbers, returns an error on overflow. */ function addUInt(uint a, uint b) internal pure returns (MathError, uint) { uint c = a + b; if (c >= a) { return (MathError.NO_ERROR, c); } else { return (MathError.INTEGER_OVERFLOW, 0); } } /** * @dev add a and b and then subtract c */ function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) { (MathError err0, uint sum) = addUInt(a, b); if (err0 != MathError.NO_ERROR) { return (err0, 0); } return subUInt(sum, c); } }
pragma solidity 0.5.17; /** * @title Exponential module for storing fixed-precision decimals * @author Moonwell * @notice Exp is a struct which stores decimals with a fixed precision of 18 decimal places. * Thus, if we wanted to store the 5.1, mantissa would store 5.1e18. That is: * `Exp({mantissa: 5100000000000000000})`. */ contract ExponentialNoError { uint constant expScale = 1e18; uint constant doubleScale = 1e36; uint constant halfExpScale = expScale/2; uint constant mantissaOne = expScale; struct Exp { uint mantissa; } struct Double { uint mantissa; } /** * @dev Truncates the given exp to a whole number value. * For example, truncate(Exp{mantissa: 15 * expScale}) = 15 */ function truncate(Exp memory exp) pure internal returns (uint) { // Note: We are not using careful math here as we're performing a division that cannot fail return exp.mantissa / expScale; } /** * @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer. */ function mul_ScalarTruncate(Exp memory a, uint scalar) pure internal returns (uint) { Exp memory product = mul_(a, scalar); return truncate(product); } /** * @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer. */ function mul_ScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (uint) { Exp memory product = mul_(a, scalar); return add_(truncate(product), addend); } /** * @dev Checks if first Exp is less than second Exp. */ function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa < right.mantissa; } /** * @dev Checks if left Exp <= right Exp. */ function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa <= right.mantissa; } /** * @dev Checks if left Exp > right Exp. */ function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) { return left.mantissa > right.mantissa; } /** * @dev returns true if Exp is exactly zero */ function isZeroExp(Exp memory value) pure internal returns (bool) { return value.mantissa == 0; } function safe224(uint n, string memory errorMessage) pure internal returns (uint224) { require(n < 2**224, errorMessage); return uint224(n); } function safe32(uint n, string memory errorMessage) pure internal returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: add_(a.mantissa, b.mantissa)}); } function add_(uint a, uint b) pure internal returns (uint) { return add_(a, b, "addition overflow"); } function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { uint c = a + b; require(c >= a, errorMessage); return c; } function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: sub_(a.mantissa, b.mantissa)}); } function sub_(uint a, uint b) pure internal returns (uint) { return sub_(a, b, "subtraction underflow"); } function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b <= a, errorMessage); return a - b; } function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale}); } function mul_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Exp memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / expScale; } function mul_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale}); } function mul_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: mul_(a.mantissa, b)}); } function mul_(uint a, Double memory b) pure internal returns (uint) { return mul_(a, b.mantissa) / doubleScale; } function mul_(uint a, uint b) pure internal returns (uint) { return mul_(a, b, "multiplication overflow"); } function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { if (a == 0 || b == 0) { return 0; } uint c = a * b; require(c / a == b, errorMessage); return c; } function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) { return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)}); } function div_(Exp memory a, uint b) pure internal returns (Exp memory) { return Exp({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Exp memory b) pure internal returns (uint) { return div_(mul_(a, expScale), b.mantissa); } function div_(Double memory a, Double memory b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)}); } function div_(Double memory a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(a.mantissa, b)}); } function div_(uint a, Double memory b) pure internal returns (uint) { return div_(mul_(a, doubleScale), b.mantissa); } function div_(uint a, uint b) pure internal returns (uint) { return div_(a, b, "divide by zero"); } function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) { require(b > 0, errorMessage); return a / b; } function fraction(uint a, uint b) pure internal returns (Double memory) { return Double({mantissa: div_(mul_(a, doubleScale), b)}); } }
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Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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PriceOracle","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"pauseGuardian","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"pendingAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"pendingComptrollerImplementation","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"mToken","type":"address"},{"internalType":"address","name":"redeemer","type":"address"},{"internalType":"uint256","name":"redeemTokens","type":"uint256"}],"name":"redeemAllowed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"mToken","type":"address"},{"internalType":"address","name":"redeemer","type":"address"},{"internalType":"uint256","name":"redeemAmount","type":"uint256"},{"internalType":"uint256","name":"redeemTokens","type":"uint256"}],"name":"redeemVerify","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"mToken","type":"address"},{"internalType":"address","name":"payer","type":"address"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"uint256","name":"repayAmount","type":"uint256"}],"name":"repayBorrowAllowed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"mToken","type":"address"},{"internalType":"address","name":"payer","type":"address"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"uint256","name":"actualRepayAmount","type":"uint256"},{"internalType":"uint256","name":"borrowerIndex","type":"uint256"}],"name":"repayBorrowVerify","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"uint8","name":"","type":"uint8"},{"internalType":"address","name":"","type":"address"}],"name":"rewardAccrued","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint8","name":"","type":"uint8"},{"internalType":"address","name":"","type":"address"}],"name":"rewardBorrowState","outputs":[{"internalType":"uint224","name":"index","type":"uint224"},{"internalType":"uint32","name":"timestamp","type":"uint32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint8","name":"","type":"uint8"},{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"rewardBorrowerIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rewardGlmr","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint8","name":"","type":"uint8"},{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"rewardSupplierIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint8","name":"","type":"uint8"},{"internalType":"address","name":"","type":"address"}],"name":"rewardSupplyState","outputs":[{"internalType":"uint224","name":"index","type":"uint224"},{"internalType":"uint32","name":"timestamp","type":"uint32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"rewardWell","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"mTokenCollateral","type":"address"},{"internalType":"address","name":"mTokenBorrowed","type":"address"},{"internalType":"address","name":"liquidator","type":"address"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"uint256","name":"seizeTokens","type":"uint256"}],"name":"seizeAllowed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"seizeGuardianPaused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"co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Deployed Bytecode
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.