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Contract Name:
ComptrollerV2
Compiler Version
v0.8.20+commit.a1b79de6
Optimization Enabled:
Yes with 1000 runs
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
import "./CToken.sol";
import "./ErrorReporter.sol";
import "./PriceOracle.sol";
import "./ComptrollerInterface.sol";
import "./ComptrollerStorage.sol";
import "./Unitroller.sol";
import "./Governance/Comp.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./Interfaces/IRewardVester.sol";
/**
* @title Compound's Comptroller Contract
* @author Compound
* @notice fMoney Comptroller V2
*/
contract ComptrollerV2 is
ComptrollerV8Storage,
ComptrollerInterface,
ComptrollerErrorReporter,
ExponentialNoError
{
/// @notice Emitted when an admin supports a market
event MarketListed(CToken cToken);
/// @notice Emitted when an account enters a market
event MarketEntered(CToken cToken, address account);
/// @notice Emitted when an account exits a market
event MarketExited(CToken cToken, address account);
/// @notice Emitted when close factor is changed by admin
event NewCloseFactor(
uint256 oldCloseFactorMantissa,
uint256 newCloseFactorMantissa
);
/// @notice Emitted when a collateral factor is changed by admin
event NewCollateralFactor(
CToken cToken,
uint256 oldCollateralFactorMantissa,
uint256 newCollateralFactorMantissa
);
/// @notice Emitted when liquidation incentive is changed by admin
event NewLiquidationIncentive(
uint256 oldLiquidationIncentiveMantissa,
uint256 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(CToken cToken, string action, bool pauseState);
/// @notice Emitted when a new borrow-side COMP speed is calculated for a market
event CompBorrowSpeedUpdated(CToken indexed cToken, uint256 newSpeed);
/// @notice Emitted when a new supply-side COMP speed is calculated for a market
event CompSupplySpeedUpdated(CToken indexed cToken, uint256 newSpeed);
/// @notice Emitted when a new COMP speed is set for a contributor
event ContributorCompSpeedUpdated(
address indexed contributor,
uint256 newSpeed
);
/// @notice Emitted when COMP is distributed to a supplier
event DistributedSupplierComp(
CToken indexed cToken,
address indexed supplier,
uint256 compDelta,
uint256 compSupplyIndex
);
/// @notice Emitted when COMP is distributed to a borrower
event DistributedBorrowerComp(
CToken indexed cToken,
address indexed borrower,
uint256 compDelta,
uint256 compBorrowIndex
);
/// @notice Emitted when borrow cap for a cToken is changed
event NewBorrowCap(CToken indexed cToken, uint256 newBorrowCap);
/// @notice Emitted when supply cap for a cToken is changed
event NewSupplyCap(CToken indexed cToken, uint256 newSupplyCap);
/// @notice Emitted when borrow cap guardian is changed
event NewBorrowCapGuardian(
address oldBorrowCapGuardian,
address newBorrowCapGuardian
);
/// @notice Emitted when supply cap guardian is changed
event NewSupplyCapGuardian(
address oldSupplyCapGuardian,
address newSupplyCapGuardian
);
/// @notice Emitted when COMP is granted by admin
event CompGranted(address recipient, uint256 amount);
/// @notice Emitted when COMP accrued for a user has been manually adjusted.
event CompAccruedAdjusted(
address indexed user,
uint256 oldCompAccrued,
uint256 newCompAccrued
);
/// @notice Emitted when COMP receivable for a user has been updated.
event CompReceivableUpdated(
address indexed user,
uint256 oldCompReceivable,
uint256 newCompReceivable
);
/// @notice The initial COMP index for a market
uint224 public constant compInitialIndex = 1e36;
// closeFactorMantissa must be strictly greater than this value
uint256 internal constant closeFactorMinMantissa = 0.05e18; // 0.05
// closeFactorMantissa must not exceed this value
uint256 internal constant closeFactorMaxMantissa = 0.9e18; // 0.9
// No collateralFactorMantissa may exceed this value
uint256 internal constant collateralFactorMaxMantissa = 0.9e18; // 0.9
constructor() {
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 (CToken[] memory) {
CToken[] 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 cToken The cToken to check
* @return True if the account is in the asset, otherwise false.
*/
function checkMembership(
address account,
CToken cToken
) external view returns (bool) {
return markets[address(cToken)].accountMembership[account];
}
/**
* @notice Add assets to be included in account liquidity calculation
* @param cTokens The list of addresses of the cToken markets to be enabled
* @return Success indicator for whether each corresponding market was entered
*/
function enterMarkets(
address[] memory cTokens
) public override returns (uint256[] memory) {
uint256 len = cTokens.length;
uint256[] memory results = new uint256[](len);
for (uint256 i = 0; i < len; i++) {
CToken cToken = CToken(cTokens[i]);
results[i] = uint256(addToMarketInternal(cToken, msg.sender));
}
return results;
}
/**
* @notice Add the market to the borrower's "assets in" for liquidity calculations
* @param cToken The market to enter
* @param borrower The address of the account to modify
* @return Success indicator for whether the market was entered
*/
function addToMarketInternal(
CToken cToken,
address borrower
) internal returns (Error) {
Market storage marketToJoin = markets[address(cToken)];
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(cToken);
emit MarketEntered(cToken, 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 cTokenAddress The address of the asset to be removed
* @return Whether or not the account successfully exited the market
*/
function exitMarket(
address cTokenAddress
) external override returns (uint256) {
CToken cToken = CToken(cTokenAddress);
/* Get sender tokensHeld and amountOwed underlying from the cToken */
(uint256 oErr, uint256 tokensHeld, uint256 amountOwed, ) = cToken
.getAccountSnapshot(msg.sender);
require(oErr == 0, "accountSnapshot fail"); // 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 */
uint256 allowed = redeemAllowedInternal(
cTokenAddress,
msg.sender,
tokensHeld
);
if (allowed != 0) {
return
failOpaque(
Error.REJECTION,
FailureInfo.EXIT_MARKET_REJECTION,
allowed
);
}
Market storage marketToExit = markets[address(cToken)];
/* Return true if the sender is not already ‘in’ the market */
if (!marketToExit.accountMembership[msg.sender]) {
return uint256(Error.NO_ERROR);
}
/* Set cToken account membership to false */
delete marketToExit.accountMembership[msg.sender];
/* Delete cToken from the account’s list of assets */
// load into memory for faster iteration
CToken[] memory userAssetList = accountAssets[msg.sender];
uint256 len = userAssetList.length;
uint256 assetIndex = len;
for (uint256 i = 0; i < len; i++) {
if (userAssetList[i] == cToken) {
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
CToken[] storage storedList = accountAssets[msg.sender];
storedList[assetIndex] = storedList[storedList.length - 1];
storedList.pop();
emit MarketExited(cToken, msg.sender);
return uint256(Error.NO_ERROR);
}
/*** Policy Hooks ***/
/**
* @notice Checks if the account should be allowed to mint tokens in the given market
* @param cToken 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 cToken,
address minter,
uint256 mintAmount
) external override returns (uint256) {
// Pausing is a very serious situation - we revert to sound the alarms
require(!mintGuardianPaused[cToken], "paused");
// Shh - currently unused
minter;
mintAmount;
if (!markets[cToken].isListed) {
return uint256(Error.MARKET_NOT_LISTED);
}
// Keep the flywheel moving
updateCompSupplyIndex(cToken);
distributeSupplierComp(cToken, minter);
return uint256(Error.NO_ERROR);
}
/**
* @notice Validates mint and reverts on rejection. May emit logs.
* @param cToken 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 cToken,
address minter,
uint256 actualMintAmount,
uint256 mintTokens
) external override {
// Shh - currently unused
cToken;
minter;
actualMintAmount;
mintTokens;
uint256 supplyCap = supplyCaps[cToken];
// Supply cap of 0 corresponds to unlimited borrowing
if (supplyCap != 0) {
uint256 totalSupply = CToken(cToken).totalSupply();
Exp memory exchangeRate = Exp({
mantissa: CToken(cToken).exchangeRateStored()
});
uint256 totalAmount = mul_ScalarTruncate(exchangeRate, totalSupply);
require(totalAmount <= supplyCap, "supply cap");
}
}
/**
* @notice Checks if the account should be allowed to redeem tokens in the given market
* @param cToken The market to verify the redeem against
* @param redeemer The account which would redeem the tokens
* @param redeemTokens The number of cTokens 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 cToken,
address redeemer,
uint256 redeemTokens
) external override returns (uint256) {
uint256 allowed = redeemAllowedInternal(cToken, redeemer, redeemTokens);
if (allowed != uint256(Error.NO_ERROR)) {
return allowed;
}
// Keep the flywheel moving
updateCompSupplyIndex(cToken);
distributeSupplierComp(cToken, redeemer);
return uint256(Error.NO_ERROR);
}
function redeemAllowedInternal(
address cToken,
address redeemer,
uint256 redeemTokens
) internal view returns (uint256) {
if (!markets[cToken].isListed) {
return uint256(Error.MARKET_NOT_LISTED);
}
/* If the redeemer is not 'in' the market, then we can bypass the liquidity check */
if (!markets[cToken].accountMembership[redeemer]) {
return uint256(Error.NO_ERROR);
}
/* Otherwise, perform a hypothetical liquidity check to guard against shortfall */
(
Error err,
,
uint256 shortfall
) = getHypotheticalAccountLiquidityInternal(
redeemer,
CToken(cToken),
redeemTokens,
0
);
if (err != Error.NO_ERROR) {
return uint256(err);
}
if (shortfall > 0) {
return uint256(Error.INSUFFICIENT_LIQUIDITY);
}
return uint256(Error.NO_ERROR);
}
/**
* @notice Validates redeem and reverts on rejection. May emit logs.
* @param cToken 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 cToken,
address redeemer,
uint256 redeemAmount,
uint256 redeemTokens
) external override {
// Shh - currently unused
cToken;
redeemer;
// Require tokens is zero or amount is also zero
if (redeemTokens == 0 && redeemAmount > 0) {
revert("redeemTokens 0");
}
}
/**
* @notice Checks if the account should be allowed to borrow the underlying asset of the given market
* @param cToken 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 cToken,
address borrower,
uint256 borrowAmount
) external override returns (uint256) {
// Pausing is a very serious situation - we revert to sound the alarms
require(!borrowGuardianPaused[cToken], "paused");
if (!markets[cToken].isListed) {
return uint256(Error.MARKET_NOT_LISTED);
}
if (!markets[cToken].accountMembership[borrower]) {
// only cTokens may call borrowAllowed if borrower not in market
require(msg.sender == cToken, "sender !cToken");
// attempt to add borrower to the market
Error err = addToMarketInternal(CToken(msg.sender), borrower);
if (err != Error.NO_ERROR) {
return uint256(err);
}
// it should be impossible to break the important invariant
assert(markets[cToken].accountMembership[borrower]);
}
if (oracle.getUnderlyingPrice(CToken(cToken)) == 0) {
return uint256(Error.PRICE_ERROR);
}
uint256 borrowCap = borrowCaps[cToken];
// Borrow cap of 0 corresponds to unlimited borrowing
if (borrowCap != 0) {
uint256 totalBorrows = CToken(cToken).totalBorrows();
uint256 nextTotalBorrows = add_(totalBorrows, borrowAmount);
require(nextTotalBorrows < borrowCap, "borrow cap");
}
(
Error err,
,
uint256 shortfall
) = getHypotheticalAccountLiquidityInternal(
borrower,
CToken(cToken),
0,
borrowAmount
);
if (err != Error.NO_ERROR) {
return uint256(err);
}
if (shortfall > 0) {
return uint256(Error.INSUFFICIENT_LIQUIDITY);
}
// Keep the flywheel moving
Exp memory borrowIndex = Exp({mantissa: CToken(cToken).borrowIndex()});
updateCompBorrowIndex(cToken, borrowIndex);
distributeBorrowerComp(cToken, borrower, borrowIndex);
return uint256(Error.NO_ERROR);
}
/**
* @notice Validates borrow and reverts on rejection. May emit logs.
* @param cToken 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 cToken,
address borrower,
uint256 borrowAmount
) external override {
// Shh - currently unused
cToken;
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 cToken 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 cToken,
address payer,
address borrower,
uint256 repayAmount
) external override returns (uint256) {
// Shh - currently unused
payer;
borrower;
repayAmount;
if (!markets[cToken].isListed) {
return uint256(Error.MARKET_NOT_LISTED);
}
// Keep the flywheel moving
Exp memory borrowIndex = Exp({mantissa: CToken(cToken).borrowIndex()});
updateCompBorrowIndex(cToken, borrowIndex);
distributeBorrowerComp(cToken, borrower, borrowIndex);
return uint256(Error.NO_ERROR);
}
/**
* @notice Validates repayBorrow and reverts on rejection. May emit logs.
* @param cToken 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 cToken,
address payer,
address borrower,
uint256 actualRepayAmount,
uint256 borrowerIndex
) external override {
// Shh - currently unused
cToken;
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 cTokenBorrowed Asset which was borrowed by the borrower
* @param cTokenCollateral 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 cTokenBorrowed,
address cTokenCollateral,
address liquidator,
address borrower,
uint256 repayAmount
) external override returns (uint256) {
// Shh - currently unused
liquidator;
if (
!markets[cTokenBorrowed].isListed ||
!markets[cTokenCollateral].isListed
) {
return uint256(Error.MARKET_NOT_LISTED);
}
uint256 borrowBalance = CToken(cTokenBorrowed).borrowBalanceStored(
borrower
);
/* allow accounts to be liquidated if the market is deprecated */
if (isDeprecated(CToken(cTokenBorrowed))) {
require(
borrowBalance >= repayAmount, "> borrow");
} else {
/* The borrower must have shortfall in order to be liquidatable */
(Error err, , uint256 shortfall) = getAccountLiquidityInternal(
borrower
);
if (err != Error.NO_ERROR) {
return uint256(err);
}
if (shortfall == 0) {
return uint256(Error.INSUFFICIENT_SHORTFALL);
}
/* The liquidator may not repay more than what is allowed by the closeFactor */
uint256 maxClose = mul_ScalarTruncate(
Exp({mantissa: closeFactorMantissa}),
borrowBalance
);
if (repayAmount > maxClose) {
return uint256(Error.TOO_MUCH_REPAY);
}
}
return uint256(Error.NO_ERROR);
}
/**
* @notice Validates liquidateBorrow and reverts on rejection. May emit logs.
* @param cTokenBorrowed Asset which was borrowed by the borrower
* @param cTokenCollateral 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 cTokenBorrowed,
address cTokenCollateral,
address liquidator,
address borrower,
uint256 actualRepayAmount,
uint256 seizeTokens
) external override {
// Shh - currently unused
cTokenBorrowed;
cTokenCollateral;
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 cTokenCollateral Asset which was used as collateral and will be seized
* @param cTokenBorrowed 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 cTokenCollateral,
address cTokenBorrowed,
address liquidator,
address borrower,
uint256 seizeTokens
) external override returns (uint256) {
// Pausing is a very serious situation - we revert to sound the alarms
require(!seizeGuardianPaused, "seize pause");
// Shh - currently unused
seizeTokens;
if (
!markets[cTokenCollateral].isListed ||
!markets[cTokenBorrowed].isListed
) {
return uint256(Error.MARKET_NOT_LISTED);
}
if (
CToken(cTokenCollateral).comptroller() !=
CToken(cTokenBorrowed).comptroller()
) {
return uint256(Error.COMPTROLLER_MISMATCH);
}
// Keep the flywheel moving
updateCompSupplyIndex(cTokenCollateral);
distributeSupplierComp(cTokenCollateral, borrower);
distributeSupplierComp(cTokenCollateral, liquidator);
return uint256(Error.NO_ERROR);
}
/**
* @notice Validates seize and reverts on rejection. May emit logs.
* @param cTokenCollateral Asset which was used as collateral and will be seized
* @param cTokenBorrowed 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 cTokenCollateral,
address cTokenBorrowed,
address liquidator,
address borrower,
uint256 seizeTokens
) external override {
// Shh - currently unused
cTokenCollateral;
cTokenBorrowed;
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 cToken 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 cTokens to transfer
* @return 0 if the transfer is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol)
*/
function transferAllowed(
address cToken,
address src,
address dst,
uint256 transferTokens
) external override returns (uint256) {
// Pausing is a very serious situation - we revert to sound the alarms
require(!transferGuardianPaused, "transfer pause");
// Currently the only consideration is whether or not
// the src is allowed to redeem this many tokens
uint256 allowed = redeemAllowedInternal(cToken, src, transferTokens);
if (allowed != uint256(Error.NO_ERROR)) {
return allowed;
}
// Keep the flywheel moving
updateCompSupplyIndex(cToken);
distributeSupplierComp(cToken, src);
distributeSupplierComp(cToken, dst);
return uint256(Error.NO_ERROR);
}
/**
* @notice Validates transfer and reverts on rejection. May emit logs.
* @param cToken Asset being transferred
* @param src The account which sources the tokens
* @param dst The account which receives the tokens
* @param transferTokens The number of cTokens to transfer
*/
function transferVerify(
address cToken,
address src,
address dst,
uint256 transferTokens
) external override {
// Shh - currently unused
cToken;
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 `cTokenBalance` is the number of cTokens the account owns in the market,
* whereas `borrowBalance` is the amount of underlying that the account has borrowed.
*/
struct AccountLiquidityLocalVars {
uint256 sumCollateral;
uint256 sumBorrowPlusEffects;
uint256 cTokenBalance;
uint256 borrowBalance;
uint256 exchangeRateMantissa;
uint256 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 (uint256, uint256, uint256) {
(
Error err,
uint256 liquidity,
uint256 shortfall
) = getHypotheticalAccountLiquidityInternal(
account,
CToken(address(0)),
0,
0
);
return (uint256(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, uint256, uint256) {
return
getHypotheticalAccountLiquidityInternal(
account,
CToken(address(0)),
0,
0
);
}
/**
* @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed
* @param cTokenModify 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 cTokenModify,
uint256 redeemTokens,
uint256 borrowAmount
) public view returns (uint256, uint256, uint256) {
(
Error err,
uint256 liquidity,
uint256 shortfall
) = getHypotheticalAccountLiquidityInternal(
account,
CToken(cTokenModify),
redeemTokens,
borrowAmount
);
return (uint256(err), liquidity, shortfall);
}
/**
* @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed
* @param cTokenModify 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 cToken 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,
CToken cTokenModify,
uint256 redeemTokens,
uint256 borrowAmount
) internal view returns (Error, uint256, uint256) {
AccountLiquidityLocalVars memory vars; // Holds all our calculation results
uint256 oErr;
// For each asset the account is in
CToken[] memory assets = accountAssets[account];
for (uint256 i = 0; i < assets.length; i++) {
CToken asset = assets[i];
// Read the balances and exchange rate from the cToken
(
oErr,
vars.cTokenBalance,
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 -> ether (normalized price value)
vars.tokensToDenom = mul_(
mul_(vars.collateralFactor, vars.exchangeRate),
vars.oraclePrice
);
// sumCollateral += tokensToDenom * cTokenBalance
vars.sumCollateral = mul_ScalarTruncateAddUInt(
vars.tokensToDenom,
vars.cTokenBalance,
vars.sumCollateral
);
// sumBorrowPlusEffects += oraclePrice * borrowBalance
vars.sumBorrowPlusEffects = mul_ScalarTruncateAddUInt(
vars.oraclePrice,
vars.borrowBalance,
vars.sumBorrowPlusEffects
);
// Calculate effects of interacting with cTokenModify
if (asset == cTokenModify) {
// 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 cToken.liquidateBorrowFresh)
* @param cTokenBorrowed The address of the borrowed cToken
* @param cTokenCollateral The address of the collateral cToken
* @param actualRepayAmount The amount of cTokenBorrowed underlying to convert into cTokenCollateral tokens
* @return (errorCode, number of cTokenCollateral tokens to be seized in a liquidation)
*/
function liquidateCalculateSeizeTokens(
address cTokenBorrowed,
address cTokenCollateral,
uint256 actualRepayAmount
) external view override returns (uint256, uint256) {
/* Read oracle prices for borrowed and collateral markets */
uint256 priceBorrowedMantissa = oracle.getUnderlyingPrice(
CToken(cTokenBorrowed)
);
uint256 priceCollateralMantissa = oracle.getUnderlyingPrice(
CToken(cTokenCollateral)
);
if (priceBorrowedMantissa == 0 || priceCollateralMantissa == 0) {
return (uint256(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)
*/
uint256 exchangeRateMantissa = CToken(cTokenCollateral)
.exchangeRateStored(); // Note: reverts on error
uint256 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 (uint256(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 (uint256) {
// 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 uint256(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(
uint256 newCloseFactorMantissa
) external returns (uint256) {
// Check caller is admin
require(msg.sender == admin, "!admin");
uint256 oldCloseFactorMantissa = closeFactorMantissa;
closeFactorMantissa = newCloseFactorMantissa;
emit NewCloseFactor(oldCloseFactorMantissa, closeFactorMantissa);
return uint256(Error.NO_ERROR);
}
/**
* @notice Sets the collateralFactor for a market
* @dev Admin function to set per-market collateralFactor
* @param cToken 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(
CToken cToken,
uint256 newCollateralFactorMantissa
) external returns (uint256) {
// 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(cToken)];
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(cToken) == 0
) {
return
fail(
Error.PRICE_ERROR,
FailureInfo.SET_COLLATERAL_FACTOR_WITHOUT_PRICE
);
}
// Set market's collateral factor to new collateral factor, remember old value
uint256 oldCollateralFactorMantissa = market.collateralFactorMantissa;
market.collateralFactorMantissa = newCollateralFactorMantissa;
// Emit event with asset, old collateral factor, and new collateral factor
emit NewCollateralFactor(
cToken,
oldCollateralFactorMantissa,
newCollateralFactorMantissa
);
return uint256(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(
uint256 newLiquidationIncentiveMantissa
) external returns (uint256) {
// 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
uint256 oldLiquidationIncentiveMantissa = liquidationIncentiveMantissa;
// Set liquidation incentive to new incentive
liquidationIncentiveMantissa = newLiquidationIncentiveMantissa;
// Emit event with old incentive, new incentive
emit NewLiquidationIncentive(
oldLiquidationIncentiveMantissa,
newLiquidationIncentiveMantissa
);
return uint256(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 cToken The address of the market (token) to list
* @return uint 0=success, otherwise a failure. (See enum Error for details)
*/
function _supportMarket(CToken cToken) external returns (uint256) {
if (msg.sender != admin) {
return
fail(
Error.UNAUTHORIZED,
FailureInfo.SUPPORT_MARKET_OWNER_CHECK
);
}
if (markets[address(cToken)].isListed) {
return
fail(
Error.MARKET_ALREADY_LISTED,
FailureInfo.SUPPORT_MARKET_EXISTS
);
}
cToken.isCToken(); // Sanity check to make sure its really a CToken
// Note that isComped is not in active use anymore
Market storage newMarket = markets[address(cToken)];
newMarket.isListed = true;
newMarket.isComped = false;
newMarket.collateralFactorMantissa = 0;
_addMarketInternal(address(cToken));
_initializeMarket(address(cToken));
emit MarketListed(cToken);
return uint256(Error.NO_ERROR);
}
function _addMarketInternal(address cToken) internal {
for (uint256 i = 0; i < allMarkets.length; i++) {
require(allMarkets[i] != CToken(cToken), "exists");
}
allMarkets.push(CToken(cToken));
}
function _initializeMarket(address cToken) internal {
uint32 blockNumber = safe32(
getBlockNumber(),
"block number exceeds 32 bits"
);
CompMarketState storage supplyState = compSupplyState[cToken];
CompMarketState storage borrowState = compBorrowState[cToken];
/*
* Update market state indices
*/
if (supplyState.index == 0) {
// Initialize supply state index with default value
supplyState.index = compInitialIndex;
}
if (borrowState.index == 0) {
// Initialize borrow state index with default value
borrowState.index = compInitialIndex;
}
/*
* Update market state block numbers
*/
supplyState.block = borrowState.block = blockNumber;
}
/**
* @notice Set the given borrow caps for the given cToken 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 cTokens 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(
CToken[] calldata cTokens,
uint256[] calldata newBorrowCaps
) external {
require(
msg.sender == admin || msg.sender == borrowCapGuardian, "!authorized"
);
uint256 numMarkets = cTokens.length;
uint256 numBorrowCaps = newBorrowCaps.length;
require(
numMarkets != 0 && numMarkets == numBorrowCaps,
"invalid input"
);
for (uint256 i = 0; i < numMarkets; i++) {
borrowCaps[address(cTokens[i])] = newBorrowCaps[i];
emit NewBorrowCap(cTokens[i], newBorrowCaps[i]);
}
}
/**
* @notice Set the given supply caps for the given cToken markets. Supplying that brings total supply to or above supply cap will revert.
* @dev Admin or supplyCapGuardian function to set the supply caps. A supply cap of 0 corresponds to unlimited supplying.
* @param cTokens The addresses of the markets (tokens) to change the supply caps for
* @param newSupplyCaps The new supply cap values in underlying to be set. A value of 0 corresponds to unlimited supplying.
*/
function _setMarketSupplyCaps(
CToken[] calldata cTokens,
uint256[] calldata newSupplyCaps
) external {
require(
msg.sender == admin || msg.sender == supplyCapGuardian, "!authorized");
uint256 numMarkets = cTokens.length;
uint256 numSupplyCaps = newSupplyCaps.length;
require(
numMarkets != 0 && numMarkets == numSupplyCaps,
"invalid input"
);
for (uint256 i = 0; i < numMarkets; i++) {
supplyCaps[address(cTokens[i])] = newSupplyCaps[i];
emit NewSupplyCap(cTokens[i], newSupplyCaps[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, "!admin");
// 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 Supply Cap Guardian
* @param newSupplyCapGuardian The address of the new Supply Cap Guardian
*/
function _setSupplyCapGuardian(address newSupplyCapGuardian) external {
require(msg.sender == admin, "!admin");
// Save current value for inclusion in log
address oldSupplyCapGuardian = supplyCapGuardian;
// Store supplyCapGuardian with value newSupplyCapGuardian
supplyCapGuardian = newSupplyCapGuardian;
// Emit NewSupplyCapGuardian(OldSupplyCapGuardian, NewSupplyCapGuardian)
emit NewSupplyCapGuardian(oldSupplyCapGuardian, newSupplyCapGuardian);
}
/**
* @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 (uint256) {
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 uint256(Error.NO_ERROR);
}
function _setMintPaused(CToken cToken, bool state) public returns (bool) {
require(
markets[address(cToken)].isListed, "!listed"
);
require(
msg.sender == pauseGuardian || msg.sender == admin, "!authorized"
);
require(msg.sender == admin || state == true, "!admin");
mintGuardianPaused[address(cToken)] = state;
emit ActionPaused(cToken, "Mint", state);
return state;
}
function _setBorrowPaused(CToken cToken, bool state) public returns (bool) {
require(
markets[address(cToken)].isListed, "!listed"
);
require(
msg.sender == pauseGuardian || msg.sender == admin, "!authorized"
);
require(msg.sender == admin || state == true, "!admin");
borrowGuardianPaused[address(cToken)] = state;
emit ActionPaused(cToken, "Borrow", state);
return state;
}
function _setTransferPaused(bool state) public returns (bool) {
require(
msg.sender == pauseGuardian || msg.sender == admin, "!authorized"
);
require(msg.sender == admin || state == true, "!admin");
transferGuardianPaused = state;
emit ActionPaused("Transfer", state);
return state;
}
function _setSeizePaused(bool state) public returns (bool) {
require(
msg.sender == pauseGuardian || msg.sender == admin, "!authorized"
);
require(msg.sender == admin || state == true, "!admin");
seizeGuardianPaused = state;
emit ActionPaused("Seize", state);
return state;
}
function _become(Unitroller unitroller) public {
require(
msg.sender == unitroller.admin(), "!unitroller"
);
require(
unitroller._acceptImplementation() == 0, "!authorized"
);
}
/// @notice Delete this function after proposal 65 is executed
function fixBadAccruals(
address[] calldata affectedUsers,
uint256[] calldata amounts
) external {
require(msg.sender == admin); // Only the timelock can call this function
require(
!proposal65FixExecuted
); // Require that this function is only called once
require(affectedUsers.length == amounts.length);
// Loop variables
address user;
uint256 currentAccrual;
uint256 amountToSubtract;
uint256 newAccrual;
// Iterate through all affected users
for (uint256 i = 0; i < affectedUsers.length; ++i) {
user = affectedUsers[i];
currentAccrual = compAccrued[user];
amountToSubtract = amounts[i];
// The case where the user has claimed and received an incorrect amount of COMP.
// The user has less currently accrued than the amount they incorrectly received.
if (amountToSubtract > currentAccrual) {
// Amount of COMP the user owes the protocol
uint256 accountReceivable = amountToSubtract - currentAccrual; // Underflow safe since amountToSubtract > currentAccrual
uint256 oldReceivable = compReceivable[user];
uint256 newReceivable = add_(oldReceivable, accountReceivable);
// Accounting: record the COMP debt for the user
compReceivable[user] = newReceivable;
emit CompReceivableUpdated(user, oldReceivable, newReceivable);
amountToSubtract = currentAccrual;
}
if (amountToSubtract > 0) {
// Subtract the bad accrual amount from what they have accrued.
// Users will keep whatever they have correctly accrued.
compAccrued[user] = newAccrual = sub_(
currentAccrual,
amountToSubtract
);
emit CompAccruedAdjusted(user, currentAccrual, newAccrual);
}
}
proposal65FixExecuted = true; // Makes it so that this function cannot be called again
}
/**
* @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;
}
/*** Comp Distribution ***/
/**
* @notice Set COMP speed for a single market
* @param cToken The market whose COMP speed to update
* @param supplySpeed New supply-side COMP speed for market
* @param borrowSpeed New borrow-side COMP speed for market
*/
function setCompSpeedInternal(
CToken cToken,
uint256 supplySpeed,
uint256 borrowSpeed
) internal {
Market storage market = markets[address(cToken)];
require(market.isListed, "!listed");
if (compSupplySpeeds[address(cToken)] != supplySpeed) {
// Supply speed updated so let's update supply state to ensure that
// 1. COMP accrued properly for the old speed, and
// 2. COMP accrued at the new speed starts after this block.
updateCompSupplyIndex(address(cToken));
// Update speed and emit event
compSupplySpeeds[address(cToken)] = supplySpeed;
emit CompSupplySpeedUpdated(cToken, supplySpeed);
}
if (compBorrowSpeeds[address(cToken)] != borrowSpeed) {
// Borrow speed updated so let's update borrow state to ensure that
// 1. COMP accrued properly for the old speed, and
// 2. COMP accrued at the new speed starts after this block.
Exp memory borrowIndex = Exp({mantissa: cToken.borrowIndex()});
updateCompBorrowIndex(address(cToken), borrowIndex);
// Update speed and emit event
compBorrowSpeeds[address(cToken)] = borrowSpeed;
emit CompBorrowSpeedUpdated(cToken, borrowSpeed);
}
}
/**
* @notice Accrue COMP to the market by updating the supply index
* @param cToken The market whose supply index to update
* @dev Index is a cumulative sum of the COMP per cToken accrued.
*/
function updateCompSupplyIndex(address cToken) internal {
CompMarketState storage supplyState = compSupplyState[cToken];
uint256 supplySpeed = compSupplySpeeds[cToken];
uint32 blockNumber = safe32(
getBlockNumber(),
"block number exceeds 32 bits"
);
uint256 deltaBlocks = sub_(
uint256(blockNumber),
uint256(supplyState.block)
);
if (deltaBlocks > 0 && supplySpeed > 0) {
uint256 supplyTokens = CToken(cToken).totalSupply();
uint256 compAccrued = mul_(deltaBlocks, supplySpeed);
Double memory ratio = supplyTokens > 0
? fraction(compAccrued, supplyTokens)
: Double({mantissa: 0});
supplyState.index = safe224(
add_(Double({mantissa: supplyState.index}), ratio).mantissa,
"new index exceeds 224 bits"
);
supplyState.block = blockNumber;
} else if (deltaBlocks > 0) {
supplyState.block = blockNumber;
}
}
/**
* @notice Accrue COMP to the market by updating the borrow index
* @param cToken The market whose borrow index to update
* @dev Index is a cumulative sum of the COMP per cToken accrued.
*/
function updateCompBorrowIndex(
address cToken,
Exp memory marketBorrowIndex
) internal {
CompMarketState storage borrowState = compBorrowState[cToken];
uint256 borrowSpeed = compBorrowSpeeds[cToken];
uint32 blockNumber = safe32(
getBlockNumber(),
"block number exceeds 32 bits"
);
uint256 deltaBlocks = sub_(
uint256(blockNumber),
uint256(borrowState.block)
);
if (deltaBlocks > 0 && borrowSpeed > 0) {
uint256 borrowAmount = div_(
CToken(cToken).totalBorrows(),
marketBorrowIndex
);
uint256 compAccrued = mul_(deltaBlocks, borrowSpeed);
Double memory ratio = borrowAmount > 0
? fraction(compAccrued, borrowAmount)
: Double({mantissa: 0});
borrowState.index = safe224(
add_(Double({mantissa: borrowState.index}), ratio).mantissa,
"new index exceeds 224 bits"
);
borrowState.block = blockNumber;
} else if (deltaBlocks > 0) {
borrowState.block = blockNumber;
}
}
/**
* @notice Calculate COMP accrued by a supplier and possibly transfer it to them
* @param cToken The market in which the supplier is interacting
* @param supplier The address of the supplier to distribute COMP to
*/
function distributeSupplierComp(address cToken, address supplier) internal {
// TODO: Don't distribute supplier COMP if the user is not in the supplier market.
// This check should be as gas efficient as possible as distributeSupplierComp is called in many places.
// - We really don't want to call an external contract as that's quite expensive.
CompMarketState storage supplyState = compSupplyState[cToken];
uint256 supplyIndex = supplyState.index;
uint256 supplierIndex = compSupplierIndex[cToken][supplier];
// Update supplier's index to the current index since we are distributing accrued COMP
compSupplierIndex[cToken][supplier] = supplyIndex;
if (supplierIndex == 0 && supplyIndex >= compInitialIndex) {
// Covers the case where users supplied tokens before the market's supply state index was set.
// Rewards the user with COMP accrued from the start of when supplier rewards were first
// set for the market.
supplierIndex = compInitialIndex;
}
// Calculate change in the cumulative sum of the COMP per cToken accrued
Double memory deltaIndex = Double({
mantissa: sub_(supplyIndex, supplierIndex)
});
uint256 supplierTokens = CToken(cToken).balanceOf(supplier);
// Calculate COMP accrued: cTokenAmount * accruedPerCToken
uint256 supplierDelta = mul_(supplierTokens, deltaIndex);
uint256 supplierAccrued = add_(compAccrued[supplier], supplierDelta);
compAccrued[supplier] = supplierAccrued;
emit DistributedSupplierComp(
CToken(cToken),
supplier,
supplierDelta,
supplyIndex
);
}
/**
* @notice Calculate COMP 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 cToken The market in which the borrower is interacting
* @param borrower The address of the borrower to distribute COMP to
*/
function distributeBorrowerComp(
address cToken,
address borrower,
Exp memory marketBorrowIndex
) internal {
// TODO: Don't distribute supplier COMP if the user is not in the borrower market.
// This check should be as gas efficient as possible as distributeBorrowerComp is called in many places.
// - We really don't want to call an external contract as that's quite expensive.
CompMarketState storage borrowState = compBorrowState[cToken];
uint256 borrowIndex = borrowState.index;
uint256 borrowerIndex = compBorrowerIndex[cToken][borrower];
// Update borrowers's index to the current index since we are distributing accrued COMP
compBorrowerIndex[cToken][borrower] = borrowIndex;
if (borrowerIndex == 0 && borrowIndex >= compInitialIndex) {
// Covers the case where users borrowed tokens before the market's borrow state index was set.
// Rewards the user with COMP accrued from the start of when borrower rewards were first
// set for the market.
borrowerIndex = compInitialIndex;
}
// Calculate change in the cumulative sum of the COMP per borrowed unit accrued
Double memory deltaIndex = Double({
mantissa: sub_(borrowIndex, borrowerIndex)
});
uint256 borrowerAmount = div_(
CToken(cToken).borrowBalanceStored(borrower),
marketBorrowIndex
);
// Calculate COMP accrued: cTokenAmount * accruedPerBorrowedUnit
uint256 borrowerDelta = mul_(borrowerAmount, deltaIndex);
uint256 borrowerAccrued = add_(compAccrued[borrower], borrowerDelta);
compAccrued[borrower] = borrowerAccrued;
emit DistributedBorrowerComp(
CToken(cToken),
borrower,
borrowerDelta,
borrowIndex
);
}
/**
* @notice Calculate additional accrued COMP for a contributor since last accrual
* @param contributor The address to calculate contributor rewards for
*/
function updateContributorRewards(address contributor) public {
uint256 compSpeed = compContributorSpeeds[contributor];
uint256 blockNumber = getBlockNumber();
uint256 deltaBlocks = sub_(
blockNumber,
lastContributorBlock[contributor]
);
if (deltaBlocks > 0 && compSpeed > 0) {
uint256 newAccrued = mul_(deltaBlocks, compSpeed);
uint256 contributorAccrued = add_(
compAccrued[contributor],
newAccrued
);
compAccrued[contributor] = contributorAccrued;
lastContributorBlock[contributor] = blockNumber;
}
}
/**
* @notice Claim all the comp accrued by holder in all markets
* @param holder The address to claim COMP for
*/
function claimComp(address holder) public {
return claimComp(holder, allMarkets);
}
/**
* @notice Claim all the comp accrued by holder in the specified markets
* @param holder The address to claim COMP for
* @param cTokens The list of markets to claim COMP in
*/
function claimComp(address holder, CToken[] memory cTokens) public {
address[] memory holders = new address[](1);
holders[0] = holder;
claimComp(holders, cTokens, true, true);
}
/**
* @notice Claim all comp accrued by the holders
* @param holders The addresses to claim COMP for
* @param cTokens The list of markets to claim COMP in
* @param borrowers Whether or not to claim COMP earned by borrowing
* @param suppliers Whether or not to claim COMP earned by supplying
*/
function claimComp(
address[] memory holders,
CToken[] memory cTokens,
bool borrowers,
bool suppliers
) public {
for (uint256 i = 0; i < cTokens.length; i++) {
CToken cToken = cTokens[i];
require(markets[address(cToken)].isListed, "!listed");
if (borrowers == true) {
Exp memory borrowIndex = Exp({mantissa: cToken.borrowIndex()});
updateCompBorrowIndex(address(cToken), borrowIndex);
for (uint256 j = 0; j < holders.length; j++) {
distributeBorrowerComp(
address(cToken),
holders[j],
borrowIndex
);
}
}
if (suppliers == true) {
updateCompSupplyIndex(address(cToken));
for (uint256 j = 0; j < holders.length; j++) {
distributeSupplierComp(address(cToken), holders[j]);
}
}
}
for (uint256 j = 0; j < holders.length; j++) {
compAccrued[holders[j]] = grantCompInternal(
holders[j],
compAccrued[holders[j]]
);
}
}
/**
* @notice Transfer COMP to the user
* @dev Note: If there is not enough COMP, we do not perform the transfer all.
* @param user The address of the user to transfer COMP to
* @param amount The amount of COMP to (possibly) transfer
* @return The amount of COMP which was NOT transferred to the user
*/
function grantCompInternal(
address user,
uint256 amount
) internal returns (uint256) {
Comp comp = Comp(getCompAddress());
uint256 compRemaining = comp.balanceOf(address(this));
if (amount > 0 && amount <= compRemaining) {
address rewardVester = getVesterAddress();
if(IRewardVester(rewardVester).isPaused()){
comp.transfer(user, amount);
return 0;
} else {
uint256 toClaim = amount >> 1;
uint256 toVest = toClaim;
comp.transfer(user, toClaim);
comp.transfer(rewardVester, toVest);
IRewardVester(rewardVester).vestFor(user, toVest);
return 0;
}
}
return amount;
}
/*** Comp Distribution Admin ***/
/**
* @notice Transfer COMP to the recipient
* @dev Note: If there is not enough COMP, we do not perform the transfer all.
* @param recipient The address of the recipient to transfer COMP to
* @param amount The amount of COMP to (possibly) transfer
*/
function _grantComp(address recipient, uint256 amount) public {
require(adminOrInitializing(), "!admin");
uint256 amountLeft = grantCompInternal(recipient, amount);
require(amountLeft == 0, "!comp");
emit CompGranted(recipient, amount);
}
/**
* @notice Set COMP borrow and supply speeds for the specified markets.
* @param cTokens The markets whose COMP speed to update.
* @param supplySpeeds New supply-side COMP speed for the corresponding market.
* @param borrowSpeeds New borrow-side COMP speed for the corresponding market.
*/
function _setCompSpeeds(
CToken[] memory cTokens,
uint256[] memory supplySpeeds,
uint256[] memory borrowSpeeds
) public {
require(adminOrInitializing(), "!admin");
uint256 numTokens = cTokens.length;
require(
numTokens == supplySpeeds.length &&
numTokens == borrowSpeeds.length, "invalid input"
);
for (uint256 i = 0; i < numTokens; ++i) {
setCompSpeedInternal(cTokens[i], supplySpeeds[i], borrowSpeeds[i]);
}
}
/**
* @notice Set COMP speed for a single contributor
* @param contributor The contributor whose COMP speed to update
* @param compSpeed New COMP speed for contributor
*/
function _setContributorCompSpeed(
address contributor,
uint256 compSpeed
) public {
require(adminOrInitializing(), "!admin");
// note that COMP speed could be set to 0 to halt liquidity rewards for a contributor
updateContributorRewards(contributor);
if (compSpeed == 0) {
// release storage
delete lastContributorBlock[contributor];
} else {
lastContributorBlock[contributor] = getBlockNumber();
}
compContributorSpeeds[contributor] = compSpeed;
emit ContributorCompSpeedUpdated(contributor, compSpeed);
}
/**
* @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 (CToken[] memory) {
return allMarkets;
}
/**
* @notice Returns true if the given cToken market has been deprecated
* @dev All borrows in a deprecated cToken market can be immediately liquidated
* @param cToken The market to check if deprecated
*/
function isDeprecated(CToken cToken) public view returns (bool) {
return
markets[address(cToken)].collateralFactorMantissa == 0 &&
borrowGuardianPaused[address(cToken)] == true &&
cToken.reserveFactorMantissa() == 1e18;
}
function getBlockNumber() public view virtual returns (uint256) {
return block.timestamp;
}
/**
* @notice Return the address of the fBUX token
* @return The address of fBUX
*/
function getCompAddress() public view virtual returns (address) {
return 0xd43b5d6899635e514A00b475eEa04C364979e076;
}
/**
* @notice Return the address of the fMoney multisig
* @return fMoney multisig address
*/
function getMsigAddress() public view virtual returns (address) {
return 0xEDFa5163b3517c375a978B1557D9D90ba823213F; // Protocol Multisig
}
/**
* @notice Return the address of the Reward Vester contract
* @return fMoney Reward Vester address
*/
function getVesterAddress() public view virtual returns (address) {
return 0xB6B02aef2B0eDFe786aBEd486D38DE95a36f53bB; // RewardVester
}
/**
* @notice To enable emission management between main lender and future iso markets
* this function enables so progressively without needing to upgrade implentation later on.
* @param _value Comp amount to send to fMoney multisig address.
*/
function migrateComp(uint _value) external {
require(msg.sender == admin);
ERC20(getCompAddress()).transfer(getMsigAddress(), _value);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* The default value of {decimals} is 18. To change this, you should override
* this function so it returns a different value.
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the default value returned by this function, unless
* it's overridden.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(address from, address to, uint256 amount) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
// decrementing then incrementing.
_balances[to] += amount;
}
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
unchecked {
// Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
_balances[account] += amount;
}
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
// Overflow not possible: amount <= accountBalance <= totalSupply.
_totalSupply -= amount;
}
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
abstract contract ComptrollerInterface {
/// @notice Indicator that this is a Comptroller contract (for inspection)
bool public constant isComptroller = true;
/*** Assets You Are In ***/
function enterMarkets(address[] calldata cTokens) virtual external returns (uint[] memory);
function exitMarket(address cToken) virtual external returns (uint);
/*** Policy Hooks ***/
function mintAllowed(address cToken, address minter, uint mintAmount) virtual external returns (uint);
function mintVerify(address cToken, address minter, uint mintAmount, uint mintTokens) virtual external;
function redeemAllowed(address cToken, address redeemer, uint redeemTokens) virtual external returns (uint);
function redeemVerify(address cToken, address redeemer, uint redeemAmount, uint redeemTokens) virtual external;
function borrowAllowed(address cToken, address borrower, uint borrowAmount) virtual external returns (uint);
function borrowVerify(address cToken, address borrower, uint borrowAmount) virtual external;
function repayBorrowAllowed(
address cToken,
address payer,
address borrower,
uint repayAmount) virtual external returns (uint);
function repayBorrowVerify(
address cToken,
address payer,
address borrower,
uint repayAmount,
uint borrowerIndex) virtual external;
function liquidateBorrowAllowed(
address cTokenBorrowed,
address cTokenCollateral,
address liquidator,
address borrower,
uint repayAmount) virtual external returns (uint);
function liquidateBorrowVerify(
address cTokenBorrowed,
address cTokenCollateral,
address liquidator,
address borrower,
uint repayAmount,
uint seizeTokens) virtual external;
function seizeAllowed(
address cTokenCollateral,
address cTokenBorrowed,
address liquidator,
address borrower,
uint seizeTokens) virtual external returns (uint);
function seizeVerify(
address cTokenCollateral,
address cTokenBorrowed,
address liquidator,
address borrower,
uint seizeTokens) virtual external;
function transferAllowed(address cToken, address src, address dst, uint transferTokens) virtual external returns (uint);
function transferVerify(address cToken, address src, address dst, uint transferTokens) virtual external;
/*** Liquidity/Liquidation Calculations ***/
function liquidateCalculateSeizeTokens(
address cTokenBorrowed,
address cTokenCollateral,
uint repayAmount) virtual external view returns (uint, uint);
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
import "./CToken.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 ComptrollerV1Storage 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
*/
uint256 public closeFactorMantissa;
/**
* @notice Multiplier representing the discount on collateral that a liquidator receives
*/
uint256 public liquidationIncentiveMantissa;
/**
* @notice Max number of assets a single account can participate in (borrow or use as collateral)
*/
uint256 public maxAssets;
/**
* @notice Per-account mapping of "assets you are in", capped by maxAssets
*/
mapping(address => CToken[]) public accountAssets;
}
contract ComptrollerV2Storage is ComptrollerV1Storage {
struct Market {
// Whether or not this market is listed
bool isListed;
// 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.
uint256 collateralFactorMantissa;
// Per-market mapping of "accounts in this asset"
mapping(address => bool) accountMembership;
// Whether or not this market receives COMP
bool isComped;
}
/**
* @notice Official mapping of cTokens -> 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;
}
contract ComptrollerV3Storage is ComptrollerV2Storage {
struct CompMarketState {
// The market's last updated compBorrowIndex or compSupplyIndex
uint224 index;
// The block number the index was last updated at
uint32 block;
}
/// @notice A list of all markets
CToken[] public allMarkets;
/// @notice The rate at which the flywheel distributes COMP, per block
uint256 public compRate;
/// @notice The portion of compRate that each market currently receives
mapping(address => uint256) public compSpeeds;
/// @notice The COMP market supply state for each market
mapping(address => CompMarketState) public compSupplyState;
/// @notice The COMP market borrow state for each market
mapping(address => CompMarketState) public compBorrowState;
/// @notice The COMP borrow index for each market for each supplier as of the last time they accrued COMP
mapping(address => mapping(address => uint256)) public compSupplierIndex;
/// @notice The COMP borrow index for each market for each borrower as of the last time they accrued COMP
mapping(address => mapping(address => uint256)) public compBorrowerIndex;
/// @notice The COMP accrued but not yet transferred to each user
mapping(address => uint256) public compAccrued;
}
contract ComptrollerV4Storage is ComptrollerV3Storage {
// @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 cToken address. Defaults to zero which corresponds to unlimited borrowing.
mapping(address => uint256) public borrowCaps;
}
contract ComptrollerV5Storage is ComptrollerV4Storage {
/// @notice The portion of COMP that each contributor receives per block
mapping(address => uint256) public compContributorSpeeds;
/// @notice Last block at which a contributor's COMP rewards have been allocated
mapping(address => uint256) public lastContributorBlock;
}
contract ComptrollerV6Storage is ComptrollerV5Storage {
/// @notice The rate at which comp is distributed to the corresponding borrow market (per block)
mapping(address => uint256) public compBorrowSpeeds;
/// @notice The rate at which comp is distributed to the corresponding supply market (per block)
mapping(address => uint256) public compSupplySpeeds;
}
contract ComptrollerV7Storage is ComptrollerV6Storage {
/// @notice Flag indicating whether the function to fix COMP accruals has been executed (RE: proposal 62 bug)
bool public proposal65FixExecuted;
/// @notice Accounting storage mapping account addresses to how much COMP they owe the protocol.
mapping(address => uint256) public compReceivable;
}
contract ComptrollerV8Storage is ComptrollerV7Storage {
/// @notice The supplyCapGuardian can set supplyCaps to any number for any market. Lowering the supply cap could disable supplying on the given market.
address public supplyCapGuardian;
/// @notice Supply caps enforced by supplyAllowed for each cToken address. Defaults to zero which corresponds to unlimited supplying.
mapping(address => uint256) public supplyCaps;
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
import "./ComptrollerInterface.sol";
import "./CTokenInterfaces.sol";
import "./ErrorReporter.sol";
import "./EIP20Interface.sol";
import "./InterestRateModel.sol";
import "./ExponentialNoError.sol";
/**
* @title Compound's CToken Contract
* @notice Abstract base for CTokens
* @author Compound
*/
abstract contract CToken is
CTokenInterface,
ExponentialNoError,
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_,
uint256 initialExchangeRateMantissa_,
string memory name_,
string memory symbol_,
uint8 decimals_
) public {
require(msg.sender == admin, "only admin may initialize the market");
require(
accrualBlockNumber == 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
uint256 err = _setComptroller(comptroller_);
require(err == NO_ERROR, "setting comptroller failed");
// Initialize block number and borrow index (block number mocks depend on comptroller being set)
accrualBlockNumber = getBlockNumber();
borrowIndex = mantissaOne;
// Set the interest rate model (depends on block number / borrow index)
err = _setInterestRateModelFresh(interestRateModel_);
require(err == 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 0 if the transfer succeeded, else revert
*/
function transferTokens(
address spender,
address src,
address dst,
uint256 tokens
) internal returns (uint256) {
/* Fail if transfer not allowed */
uint256 allowed = comptroller.transferAllowed(
address(this),
src,
dst,
tokens
);
if (allowed != 0) {
revert TransferComptrollerRejection(allowed);
}
/* Do not allow self-transfers */
if (src == dst) {
revert TransferNotAllowed();
}
/* Get the allowance, infinite for the account owner */
uint256 startingAllowance = 0;
if (spender == src) {
startingAllowance = type(uint256).max;
} else {
startingAllowance = transferAllowances[src][spender];
}
/* Do the calculations, checking for {under,over}flow */
uint256 allowanceNew = startingAllowance - tokens;
uint256 srcTokensNew = accountTokens[src] - tokens;
uint256 dstTokensNew = accountTokens[dst] + tokens;
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
accountTokens[src] = srcTokensNew;
accountTokens[dst] = dstTokensNew;
/* Eat some of the allowance (if necessary) */
if (startingAllowance != type(uint256).max) {
transferAllowances[src][spender] = allowanceNew;
}
/* We emit a Transfer event */
emit Transfer(src, dst, tokens);
// unused function
// comptroller.transferVerify(address(this), src, dst, tokens);
return 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
override
nonReentrant
returns (bool)
{
return transferTokens(msg.sender, msg.sender, dst, amount) == 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 override nonReentrant returns (bool) {
return transferTokens(msg.sender, src, dst, amount) == 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 (uint256.max means infinite)
* @return Whether or not the approval succeeded
*/
function approve(address spender, uint256 amount)
external
override
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
override
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 override 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
override
returns (uint256)
{
Exp memory exchangeRate = Exp({mantissa: exchangeRateCurrent()});
return mul_ScalarTruncate(exchangeRate, accountTokens[owner]);
}
/**
* @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
override
returns (
uint256,
uint256,
uint256,
uint256
)
{
return (
NO_ERROR,
accountTokens[account],
borrowBalanceStoredInternal(account),
exchangeRateStoredInternal()
);
}
/**
* @dev Function to simply retrieve block number
* This exists mainly for inheriting test contracts to stub this result.
*/
function getBlockNumber() internal view virtual returns (uint256) {
return block.timestamp;
}
/**
* @notice Returns the current per-block borrow interest rate for this cToken
* @return The borrow interest rate per block, scaled by 1e18
*/
function borrowRatePerBlock() external view override returns (uint256) {
return
interestRateModel.getBorrowRate(
getCashPrior(),
totalBorrows,
totalReserves
);
}
/**
* @notice Returns the current per-block supply interest rate for this cToken
* @return The supply interest rate per block, scaled by 1e18
*/
function supplyRatePerBlock() external view override returns (uint256) {
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
override
nonReentrant
returns (uint256)
{
accrueInterest();
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
override
nonReentrant
returns (uint256)
{
accrueInterest();
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
override
returns (uint256)
{
return borrowBalanceStoredInternal(account);
}
/**
* @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 (uint256)
{
/* 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 0;
}
/* Calculate new borrow balance using the interest index:
* recentBorrowBalance = borrower.borrowBalance * market.borrowIndex / borrower.borrowIndex
*/
uint256 principalTimesIndex = borrowSnapshot.principal * borrowIndex;
return principalTimesIndex / borrowSnapshot.interestIndex;
}
/**
* @notice Accrue interest then return the up-to-date exchange rate
* @return Calculated exchange rate scaled by 1e18
*/
function exchangeRateCurrent()
public
override
nonReentrant
returns (uint256)
{
accrueInterest();
return exchangeRateStored();
}
/**
* @notice Calculates the exchange rate from the underlying to the CToken
* @dev This function does not accrue interest before calculating the exchange rate
* @return Calculated exchange rate scaled by 1e18
*/
function exchangeRateStored() public view override returns (uint256) {
return exchangeRateStoredInternal();
}
/**
* @notice Calculates the exchange rate from the underlying to the CToken
* @dev This function does not accrue interest before calculating the exchange rate
* @return calculated exchange rate scaled by 1e18
*/
function exchangeRateStoredInternal()
internal
view
virtual
returns (uint256)
{
uint256 _totalSupply = totalSupply;
if (_totalSupply == 0) {
/*
* If there are no tokens minted:
* exchangeRate = initialExchangeRate
*/
return initialExchangeRateMantissa;
} else {
/*
* Otherwise:
* exchangeRate = (totalCash + totalBorrows - totalReserves) / totalSupply
*/
uint256 totalCash = getCashPrior();
uint256 cashPlusBorrowsMinusReserves = totalCash +
totalBorrows -
totalReserves;
uint256 exchangeRate = (cashPlusBorrowsMinusReserves * expScale) /
_totalSupply;
return exchangeRate;
}
}
/**
* @notice Get cash balance of this cToken in the underlying asset
* @return The quantity of underlying asset owned by this contract
*/
function getCash() external view override returns (uint256) {
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 virtual override returns (uint256) {
/* Remember the initial block number */
uint256 currentBlockNumber = getBlockNumber();
uint256 accrualBlockNumberPrior = accrualBlockNumber;
/* Short-circuit accumulating 0 interest */
if (accrualBlockNumberPrior == currentBlockNumber) {
return NO_ERROR;
}
/* Read the previous values out of storage */
uint256 cashPrior = getCashPrior();
uint256 borrowsPrior = totalBorrows;
uint256 reservesPrior = totalReserves;
uint256 borrowIndexPrior = borrowIndex;
/* Calculate the current borrow interest rate */
uint256 borrowRateMantissa = interestRateModel.getBorrowRate(
cashPrior,
borrowsPrior,
reservesPrior
);
require(
borrowRateMantissa <= borrowRateMaxMantissa,
"borrow rate is absurdly high"
);
/* Calculate the number of blocks elapsed since the last accrual */
uint256 blockDelta = currentBlockNumber - accrualBlockNumberPrior;
/*
* 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 = mul_(
Exp({mantissa: borrowRateMantissa}),
blockDelta
);
uint256 interestAccumulated = mul_ScalarTruncate(
simpleInterestFactor,
borrowsPrior
);
uint256 totalBorrowsNew = interestAccumulated + borrowsPrior;
uint256 totalReservesNew = mul_ScalarTruncateAddUInt(
Exp({mantissa: reserveFactorMantissa}),
interestAccumulated,
reservesPrior
);
uint256 borrowIndexNew = mul_ScalarTruncateAddUInt(
simpleInterestFactor,
borrowIndexPrior,
borrowIndexPrior
);
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/* We write the previously calculated values into storage */
accrualBlockNumber = currentBlockNumber;
borrowIndex = borrowIndexNew;
totalBorrows = totalBorrowsNew;
totalReserves = totalReservesNew;
/* We emit an AccrueInterest event */
emit AccrueInterest(
cashPrior,
interestAccumulated,
borrowIndexNew,
totalBorrowsNew
);
return NO_ERROR;
}
/**
* @notice Sender supplies assets into the market and receives cTokens in exchange
* @dev Accrues interest whether or not the operation succeeds, unless reverted
* @param mintAmount The amount of the underlying asset to supply
*/
function mintInternal(uint256 mintAmount) internal nonReentrant {
accrueInterest();
// mintFresh emits the actual Mint event if successful and logs on errors, so we don't need to
mintFresh(msg.sender, mintAmount);
}
/**
* @notice User supplies assets into the market and receives cTokens 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
*/
function mintFresh(address minter, uint256 mintAmount) internal {
/* Fail if mint not allowed */
uint256 allowed = comptroller.mintAllowed(
address(this),
minter,
mintAmount
);
if (allowed != 0) {
revert MintComptrollerRejection(allowed);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
revert MintFreshnessCheck();
}
Exp memory exchangeRate = Exp({mantissa: exchangeRateStoredInternal()});
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We call `doTransferIn` for the minter and the mintAmount.
* Note: The cToken must handle variations between ERC-20 and ETH 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 cToken holds an additional `actualMintAmount`
* of cash.
*/
uint256 actualMintAmount = doTransferIn(minter, mintAmount);
/*
* We get the current exchange rate and calculate the number of cTokens to be minted:
* mintTokens = actualMintAmount / exchangeRate
*/
uint256 mintTokens = div_(actualMintAmount, exchangeRate);
/*
* We calculate the new total supply of cTokens and minter token balance, checking for overflow:
* totalSupplyNew = totalSupply + mintTokens
* accountTokensNew = accountTokens[minter] + mintTokens
* And write them into storage
*/
totalSupply = totalSupply + mintTokens;
accountTokens[minter] = accountTokens[minter] + mintTokens;
/* We emit a Mint event, and a Transfer event */
emit Mint(minter, actualMintAmount, mintTokens);
emit Transfer(address(this), minter, mintTokens);
/* We call the defense hook */
comptroller.mintVerify(address(this), minter, actualMintAmount, mintTokens);
}
/**
* @notice Sender redeems cTokens in exchange for the underlying asset
* @dev Accrues interest whether or not the operation succeeds, unless reverted
* @param redeemTokens The number of cTokens to redeem into underlying
*/
function redeemInternal(uint256 redeemTokens) internal nonReentrant {
accrueInterest();
// redeemFresh emits redeem-specific logs on errors, so we don't need to
redeemFresh(payable(msg.sender), redeemTokens, 0);
}
/**
* @notice Sender redeems cTokens 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 cTokens
*/
function redeemUnderlyingInternal(uint256 redeemAmount)
internal
nonReentrant
{
accrueInterest();
// redeemFresh emits redeem-specific logs on errors, so we don't need to
redeemFresh(payable(msg.sender), 0, redeemAmount);
}
/**
* @notice User redeems cTokens 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 cTokens 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 cTokens (only one of redeemTokensIn or redeemAmountIn may be non-zero)
*/
function redeemFresh(
address payable redeemer,
uint256 redeemTokensIn,
uint256 redeemAmountIn
) internal {
require(
redeemTokensIn == 0 || redeemAmountIn == 0,
"one of redeemTokensIn or redeemAmountIn must be zero"
);
/* exchangeRate = invoke Exchange Rate Stored() */
Exp memory exchangeRate = Exp({mantissa: exchangeRateStoredInternal()});
uint256 redeemTokens;
uint256 redeemAmount;
/* 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
*/
redeemTokens = redeemTokensIn;
redeemAmount = mul_ScalarTruncate(exchangeRate, redeemTokensIn);
} else {
/*
* We get the current exchange rate and calculate the amount to be redeemed:
* redeemTokens = redeemAmountIn / exchangeRate
* redeemAmount = redeemAmountIn
*/
redeemTokens = div_(redeemAmountIn, exchangeRate);
redeemAmount = redeemAmountIn;
}
/* Fail if redeem not allowed */
uint256 allowed = comptroller.redeemAllowed(
address(this),
redeemer,
redeemTokens
);
if (allowed != 0) {
revert RedeemComptrollerRejection(allowed);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
revert RedeemFreshnessCheck();
}
/* Fail gracefully if protocol has insufficient cash */
if (getCashPrior() < redeemAmount) {
revert RedeemTransferOutNotPossible();
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We write the previously calculated values into storage.
* Note: Avoid token reentrancy attacks by writing reduced supply before external transfer.
*/
totalSupply = totalSupply - redeemTokens;
accountTokens[redeemer] = accountTokens[redeemer] - redeemTokens;
/*
* We invoke doTransferOut for the redeemer and the redeemAmount.
* Note: The cToken must handle variations between ERC-20 and ETH underlying.
* On success, the cToken has redeemAmount less of cash.
* doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred.
*/
doTransferOut(redeemer, redeemAmount);
/* We emit a Transfer event, and a Redeem event */
emit Transfer(redeemer, address(this), redeemTokens);
emit Redeem(redeemer, redeemAmount, redeemTokens);
/* We call the defense hook */
comptroller.redeemVerify(
address(this),
redeemer,
redeemAmount,
redeemTokens
);
}
/**
* @notice Sender borrows assets from the protocol to their own address
* @param borrowAmount The amount of the underlying asset to borrow
*/
function borrowInternal(uint256 borrowAmount) internal nonReentrant {
accrueInterest();
// borrowFresh emits borrow-specific logs on errors, so we don't need to
borrowFresh(payable(msg.sender), borrowAmount);
}
/**
* @notice Users borrow assets from the protocol to their own address
* @param borrowAmount The amount of the underlying asset to borrow
*/
function borrowFresh(address payable borrower, uint256 borrowAmount)
internal
{
/* Fail if borrow not allowed */
uint256 allowed = comptroller.borrowAllowed(
address(this),
borrower,
borrowAmount
);
if (allowed != 0) {
revert BorrowComptrollerRejection(allowed);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
revert BorrowFreshnessCheck();
}
/* Fail gracefully if protocol has insufficient underlying cash */
if (getCashPrior() < borrowAmount) {
revert BorrowCashNotAvailable();
}
/*
* We calculate the new borrower and total borrow balances, failing on overflow:
* accountBorrowNew = accountBorrow + borrowAmount
* totalBorrowsNew = totalBorrows + borrowAmount
*/
uint256 accountBorrowsPrev = borrowBalanceStoredInternal(borrower);
uint256 accountBorrowsNew = accountBorrowsPrev + borrowAmount;
uint256 totalBorrowsNew = totalBorrows + borrowAmount;
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We write the previously calculated values into storage.
* Note: Avoid token reentrancy attacks by writing increased borrow before external transfer.
`*/
accountBorrows[borrower].principal = accountBorrowsNew;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = totalBorrowsNew;
/*
* We invoke doTransferOut for the borrower and the borrowAmount.
* Note: The cToken must handle variations between ERC-20 and ETH underlying.
* On success, the cToken borrowAmount less of cash.
* doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred.
*/
doTransferOut(borrower, borrowAmount);
/* We emit a Borrow event */
emit Borrow(borrower, borrowAmount, accountBorrowsNew, totalBorrowsNew);
}
/**
* @notice Sender repays their own borrow
* @param repayAmount The amount to repay, or -1 for the full outstanding amount
*/
function repayBorrowInternal(uint256 repayAmount) internal nonReentrant {
accrueInterest();
// repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to
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, or -1 for the full outstanding amount
*/
function repayBorrowBehalfInternal(address borrower, uint256 repayAmount)
internal
nonReentrant
{
accrueInterest();
// repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to
repayBorrowFresh(msg.sender, borrower, repayAmount);
}
/**
* @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 underlying tokens being returned, or -1 for the full outstanding amount
* @return (uint) the actual repayment amount.
*/
function repayBorrowFresh(
address payer,
address borrower,
uint256 repayAmount
) internal returns (uint256) {
/* Fail if repayBorrow not allowed */
uint256 allowed = comptroller.repayBorrowAllowed(
address(this),
payer,
borrower,
repayAmount
);
if (allowed != 0) {
revert RepayBorrowComptrollerRejection(allowed);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
revert RepayBorrowFreshnessCheck();
}
/* We fetch the amount the borrower owes, with accumulated interest */
uint256 accountBorrowsPrev = borrowBalanceStoredInternal(borrower);
/* If repayAmount == -1, repayAmount = accountBorrows */
uint256 repayAmountFinal = repayAmount == type(uint256).max
? accountBorrowsPrev
: repayAmount;
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We call doTransferIn for the payer and the repayAmount
* Note: The cToken must handle variations between ERC-20 and ETH underlying.
* On success, the cToken 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.
*/
uint256 actualRepayAmount = doTransferIn(payer, repayAmountFinal);
/*
* We calculate the new borrower and total borrow balances, failing on underflow:
* accountBorrowsNew = accountBorrows - actualRepayAmount
* totalBorrowsNew = totalBorrows - actualRepayAmount
*/
uint256 accountBorrowsNew = accountBorrowsPrev - actualRepayAmount;
uint256 totalBorrowsNew = totalBorrows - actualRepayAmount;
/* We write the previously calculated values into storage */
accountBorrows[borrower].principal = accountBorrowsNew;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = totalBorrowsNew;
/* We emit a RepayBorrow event */
emit RepayBorrow(
payer,
borrower,
actualRepayAmount,
accountBorrowsNew,
totalBorrowsNew
);
return actualRepayAmount;
}
/**
* @notice Sender repays their own borrow using cTokens
* @param repayAmount The amount of the underlying debt to repay
*/
function repayBorrowWithCTokenInternal(uint repayAmount) internal nonReentrant {
accrueInterest();
// repayBorrowWithCTokenFresh emits repay-borrow-specific logs on errors, so we don't need to
repayBorrowWithCTokenFresh(msg.sender, msg.sender, repayAmount);
}
/**
* @notice Sender repays a borrow belonging to borrower using cTokens
* @param borrower The account with the debt being paid off
* @param repayAmount The amount of the underlying debt to repay
*/
function repayBorrowBehalfWithCTokenInternal(address borrower, uint repayAmount) internal nonReentrant {
accrueInterest();
// repayBorrowWithCTokenFresh emits repay-borrow-specific logs on errors, so we don't need to
repayBorrowWithCTokenFresh(msg.sender, borrower, repayAmount);
}
/**
* @notice Core logic for repaying a borrow with cTokens
* @param payer The account providing the cTokens
* @param borrower The account with the debt being paid off
* @param repayAmount The amount of underlying being repaid
*/
function repayBorrowWithCTokenFresh(
address payer,
address borrower,
uint repayAmount
) internal returns (uint) {
/* Fail if repayBorrow not allowed */
uint256 allowed = comptroller.repayBorrowAllowed(
address(this),
payer,
borrower,
repayAmount
);
if (allowed != 0) {
revert RepayBorrowComptrollerRejection(allowed);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
revert RepayBorrowFreshnessCheck();
}
/* Get the borrower's borrow balance */
uint accountBorrowsPrev = borrowBalanceStoredInternal(borrower);
/* If repayAmount = -1, repay the full amount */
uint repayAmountFinal = (repayAmount == type(uint256).max) ? accountBorrowsPrev : repayAmount;
/* Fail gracefully if trying to repay more than owed */
if (repayAmountFinal > accountBorrowsPrev) {
revert TransferTooMuch();
}
/* Calculate how many cTokens need to be burned based on underlying amount */
Exp memory exchangeRate = Exp({mantissa: exchangeRateStoredInternal()});
uint cTokenAmount = div_(repayAmountFinal, exchangeRate);
/* Check redeem allowed before checking balances - if not allowed, no need to check balances */
allowed = comptroller.redeemAllowed(address(this), payer, cTokenAmount);
if (allowed != 0) {
revert RedeemComptrollerRejection(allowed);
}
/* Verify payer has enough cTokens */
if (accountTokens[payer] < cTokenAmount) {
revert TransferNotEnough();
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/* Reduce payer's cToken balance and total supply */
totalSupply = totalSupply - cTokenAmount;
accountTokens[payer] = accountTokens[payer] - cTokenAmount;
/* We calculate the new borrower and total borrow balances, failing on underflow: */
uint256 accountBorrowsNew = accountBorrowsPrev - repayAmountFinal;
uint256 totalBorrowsNew = totalBorrows - repayAmountFinal;
/* We write the previously calculated values into storage */
accountBorrows[borrower].principal = accountBorrowsNew;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = totalBorrowsNew;
/* Emit events */
emit Transfer(payer, address(this), cTokenAmount);
emit RepayBorrow(payer, borrower, repayAmountFinal, accountBorrowsNew, totalBorrowsNew);
/* Call verification hooks */
comptroller.redeemVerify(address(this), payer, repayAmountFinal, cTokenAmount);
return NO_ERROR;
}
/**
* @notice The sender liquidates the borrowers collateral.
* The collateral seized is transferred to the liquidator.
* @param borrower The borrower of this cToken to be liquidated
* @param cTokenCollateral The market in which to seize collateral from the borrower
* @param repayAmount The amount of the underlying borrowed asset to repay
*/
function liquidateBorrowInternal(
address borrower,
uint256 repayAmount,
CTokenInterface cTokenCollateral
) internal nonReentrant {
accrueInterest();
uint256 error = cTokenCollateral.accrueInterest();
if (error != NO_ERROR) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed
revert LiquidateAccrueCollateralInterestFailed(error);
}
// liquidateBorrowFresh emits borrow-specific logs on errors, so we don't need to
liquidateBorrowFresh(
msg.sender,
borrower,
repayAmount,
cTokenCollateral
);
}
/**
* @notice The liquidator liquidates the borrowers collateral.
* The collateral seized is transferred to the liquidator.
* @param borrower The borrower of this cToken to be liquidated
* @param liquidator The address repaying the borrow and seizing collateral
* @param cTokenCollateral The market in which to seize collateral from the borrower
* @param repayAmount The amount of the underlying borrowed asset to repay
*/
function liquidateBorrowFresh(
address liquidator,
address borrower,
uint256 repayAmount,
CTokenInterface cTokenCollateral
) internal {
/* Fail if liquidate not allowed */
uint256 allowed = comptroller.liquidateBorrowAllowed(
address(this),
address(cTokenCollateral),
liquidator,
borrower,
repayAmount
);
if (allowed != 0) {
revert LiquidateComptrollerRejection(allowed);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
revert LiquidateFreshnessCheck();
}
/* Verify cTokenCollateral market's block number equals current block number */
if (cTokenCollateral.accrualBlockNumber() != getBlockNumber()) {
revert LiquidateCollateralFreshnessCheck();
}
/* Fail if borrower = liquidator */
if (borrower == liquidator) {
revert LiquidateLiquidatorIsBorrower();
}
/* Fail if repayAmount = 0 */
if (repayAmount == 0) {
revert LiquidateCloseAmountIsZero();
}
/* Fail if repayAmount = -1 */
if (repayAmount == type(uint256).max) {
revert LiquidateCloseAmountIsUintMax();
}
/* Fail if repayBorrow fails */
uint256 actualRepayAmount = repayBorrowFresh(
liquidator,
borrower,
repayAmount
);
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/* We calculate the number of collateral tokens that will be seized */
(uint256 amountSeizeError, uint256 seizeTokens) = comptroller
.liquidateCalculateSeizeTokens(
address(this),
address(cTokenCollateral),
actualRepayAmount
);
require(
amountSeizeError == NO_ERROR,
"LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED"
);
/* Revert if borrower collateral token balance < seizeTokens */
require(
cTokenCollateral.balanceOf(borrower) >= seizeTokens,
"LIQUIDATE_SEIZE_TOO_MUCH"
);
// If this is also the collateral, run seizeInternal to avoid re-entrancy, otherwise make an external call
if (address(cTokenCollateral) == address(this)) {
seizeInternal(address(this), liquidator, borrower, seizeTokens);
} else {
require(
cTokenCollateral.seize(liquidator, borrower, seizeTokens) ==
NO_ERROR,
"token seizure failed"
);
}
/* We emit a LiquidateBorrow event */
emit LiquidateBorrow(
liquidator,
borrower,
actualRepayAmount,
address(cTokenCollateral),
seizeTokens
);
}
/**
* @notice Transfers collateral tokens (this market) to the liquidator.
* @dev Will fail unless called by another cToken during the process of liquidation.
* Its absolutely critical to use msg.sender as the borrowed cToken and not a parameter.
* @param liquidator The account receiving seized collateral
* @param borrower The account having collateral seized
* @param seizeTokens The number of cTokens to seize
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function seize(
address liquidator,
address borrower,
uint256 seizeTokens
) external override nonReentrant returns (uint256) {
seizeInternal(msg.sender, liquidator, borrower, seizeTokens);
return NO_ERROR;
}
/**
* @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 CToken.
* Its absolutely critical to use msg.sender as the seizer cToken and not a parameter.
* @param seizerToken The contract seizing the collateral (i.e. borrowed cToken)
* @param liquidator The account receiving seized collateral
* @param borrower The account having collateral seized
* @param seizeTokens The number of cTokens to seize
*/
function seizeInternal(
address seizerToken,
address liquidator,
address borrower,
uint256 seizeTokens
) internal {
/* Fail if seize not allowed */
uint256 allowed = comptroller.seizeAllowed(
address(this),
seizerToken,
liquidator,
borrower,
seizeTokens
);
if (allowed != 0) {
revert LiquidateSeizeComptrollerRejection(allowed);
}
/* Fail if borrower = liquidator */
if (borrower == liquidator) {
revert LiquidateSeizeLiquidatorIsBorrower();
}
/*
* We calculate the new borrower and liquidator token balances, failing on underflow/overflow:
* borrowerTokensNew = accountTokens[borrower] - seizeTokens
* liquidatorTokensNew = accountTokens[liquidator] + seizeTokens
*/
uint256 protocolSeizeTokens = mul_(
seizeTokens,
Exp({mantissa: protocolSeizeShareMantissa})
);
uint256 liquidatorSeizeTokens = seizeTokens - protocolSeizeTokens;
Exp memory exchangeRate = Exp({mantissa: exchangeRateStoredInternal()});
uint256 protocolSeizeAmount = mul_ScalarTruncate(
exchangeRate,
protocolSeizeTokens
);
uint256 totalReservesNew = totalReserves + protocolSeizeAmount;
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/* We write the calculated values into storage */
totalReserves = totalReservesNew;
totalSupply = totalSupply - protocolSeizeTokens;
accountTokens[borrower] = accountTokens[borrower] - seizeTokens;
accountTokens[liquidator] =
accountTokens[liquidator] +
liquidatorSeizeTokens;
/* Emit a Transfer event */
emit Transfer(borrower, liquidator, liquidatorSeizeTokens);
emit Transfer(borrower, address(this), protocolSeizeTokens);
emit ReservesAdded(
address(this),
protocolSeizeAmount,
totalReservesNew
);
}
/*** 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
override
returns (uint256)
{
// Check caller = admin
if (msg.sender != admin) {
revert SetPendingAdminOwnerCheck();
}
// 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 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 override returns (uint256) {
// Check caller is pendingAdmin and pendingAdmin ≠ address(0)
if (msg.sender != pendingAdmin || msg.sender == address(0)) {
revert AcceptAdminPendingAdminCheck();
}
// 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 = payable(address(0));
emit NewAdmin(oldAdmin, admin);
emit NewPendingAdmin(oldPendingAdmin, pendingAdmin);
return 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
override
returns (uint256)
{
// Check caller is admin
if (msg.sender != admin) {
revert SetComptrollerOwnerCheck();
}
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 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(uint256 newReserveFactorMantissa)
external
override
nonReentrant
returns (uint256)
{
accrueInterest();
// _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(uint256 newReserveFactorMantissa)
internal
returns (uint256)
{
// Check caller is admin
if (msg.sender != admin) {
revert SetReserveFactorAdminCheck();
}
// Verify market's block number equals current block number
if (accrualBlockNumber != getBlockNumber()) {
revert SetReserveFactorFreshCheck();
}
// Check newReserveFactor ≤ maxReserveFactor
if (newReserveFactorMantissa > reserveFactorMaxMantissa) {
revert SetReserveFactorBoundsCheck();
}
uint256 oldReserveFactorMantissa = reserveFactorMantissa;
reserveFactorMantissa = newReserveFactorMantissa;
emit NewReserveFactor(
oldReserveFactorMantissa,
newReserveFactorMantissa
);
return 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(uint256 addAmount)
internal
nonReentrant
returns (uint256)
{
accrueInterest();
// _addReservesFresh emits reserve-addition-specific logs on errors, so we don't need to.
_addReservesFresh(addAmount);
return NO_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(uint256 addAmount)
internal
returns (uint256, uint256)
{
// totalReserves + actualAddAmount
uint256 totalReservesNew;
uint256 actualAddAmount;
// We fail gracefully unless market's block number equals current block number
if (accrualBlockNumber != getBlockNumber()) {
revert AddReservesFactorFreshCheck(actualAddAmount);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We call doTransferIn for the caller and the addAmount
* Note: The cToken must handle variations between ERC-20 and ETH underlying.
* On success, the cToken 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;
// 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 (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(uint256 reduceAmount, address payable reserveReceiver)
external
override
nonReentrant
returns (uint256)
{
accrueInterest();
// _reduceReservesFresh emits reserve-reduction-specific logs on errors, so we don't need to.
return _reduceReservesFresh(reduceAmount, reserveReceiver);
}
/**
* @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(uint256 reduceAmount, address payable reserveReceiver)
internal
returns (uint256)
{
// totalReserves - reduceAmount
uint256 totalReservesNew;
// Check caller is admin
if (msg.sender != admin) {
revert ReduceReservesAdminCheck();
}
if(reserveReceiver == address(0)){
revert ZeroAddress();
}
// We fail gracefully unless market's block number equals current block number
if (accrualBlockNumber != getBlockNumber()) {
revert ReduceReservesFreshCheck();
}
// Fail gracefully if protocol has insufficient underlying cash
if (getCashPrior() < reduceAmount) {
revert ReduceReservesCashNotAvailable();
}
// Check reduceAmount ≤ reserves[n] (totalReserves)
if (reduceAmount > totalReserves) {
revert ReduceReservesCashValidation();
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
totalReservesNew = totalReserves - reduceAmount;
// 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(reserveReceiver, reduceAmount);
emit ReservesReduced(admin, reduceAmount, totalReservesNew, reserveReceiver);
return 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
override
returns (uint256)
{
accrueInterest();
// _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 (uint256)
{
// 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) {
revert SetInterestRateModelOwnerCheck();
}
// We fail gracefully unless market's block number equals current block number
if (accrualBlockNumber != getBlockNumber()) {
revert SetInterestRateModelFreshCheck();
}
// 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 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 virtual returns (uint256);
/**
* @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, uint256 amount)
internal
virtual
returns (uint256);
/**
* @dev Performs a transfer out, ideally returning an explanatory error code upon failure rather 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, uint256 amount) internal virtual;
/*** 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
}
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
import "./ComptrollerInterface.sol";
import "./InterestRateModel.sol";
import "./EIP20NonStandardInterface.sol";
import "./ErrorReporter.sol";
contract CTokenStorage {
/**
* @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;
// Maximum borrow rate that can ever be applied (.00004% / block)
uint internal constant borrowRateMaxMantissa = 0.00004e16;
// 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-cToken operations
*/
ComptrollerInterface public comptroller;
/**
* @notice Model which tells what the current interest rate should be
*/
InterestRateModel public interestRateModel;
// Initial exchange rate used when minting the first CTokens (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 accrualBlockNumber;
/**
* @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;
// Official record of token balances for each account
mapping (address => uint) internal accountTokens;
// 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;
}
// 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 constant protocolSeizeShareMantissa = 2.8e16; //2.8%
}
abstract contract CTokenInterface is CTokenStorage {
/**
* @notice Indicator that this is a CToken contract (for inspection)
*/
bool public constant isCToken = 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 cTokenCollateral, 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 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, address payable reserveReceiver);
/**
* @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);
/*** User Interface ***/
function transfer(address dst, uint amount) virtual external returns (bool);
function transferFrom(address src, address dst, uint amount) virtual external returns (bool);
function approve(address spender, uint amount) virtual external returns (bool);
function allowance(address owner, address spender) virtual external view returns (uint);
function balanceOf(address owner) virtual external view returns (uint);
function balanceOfUnderlying(address owner) virtual external returns (uint);
function getAccountSnapshot(address account) virtual external view returns (uint, uint, uint, uint);
function borrowRatePerBlock() virtual external view returns (uint);
function supplyRatePerBlock() virtual external view returns (uint);
function totalBorrowsCurrent() virtual external returns (uint);
function borrowBalanceCurrent(address account) virtual external returns (uint);
function borrowBalanceStored(address account) virtual external view returns (uint);
function exchangeRateCurrent() virtual external returns (uint);
function exchangeRateStored() virtual external view returns (uint);
function getCash() virtual external view returns (uint);
function accrueInterest() virtual external returns (uint);
function seize(address liquidator, address borrower, uint seizeTokens) virtual external returns (uint);
/*** Admin Functions ***/
function _setPendingAdmin(address payable newPendingAdmin) virtual external returns (uint);
function _acceptAdmin() virtual external returns (uint);
function _setComptroller(ComptrollerInterface newComptroller) virtual external returns (uint);
function _setReserveFactor(uint newReserveFactorMantissa) virtual external returns (uint);
function _reduceReserves(uint reduceAmount, address payable reserveReceiver) virtual external returns (uint);
function _setInterestRateModel(InterestRateModel newInterestRateModel) virtual external returns (uint);
}
contract CErc20Storage {
/**
* @notice Underlying asset for this CToken
*/
address public underlying;
}
abstract contract CErc20Interface is CErc20Storage {
/*** User Interface ***/
function mint(uint mintAmount) virtual external returns (uint);
function redeem(uint redeemTokens) virtual external returns (uint);
function redeemUnderlying(uint redeemAmount) virtual external returns (uint);
function borrow(uint borrowAmount) virtual external returns (uint);
function repayBorrow(uint repayAmount) virtual external returns (uint);
function repayBorrowBehalf(address borrower, uint repayAmount) virtual external returns (uint);
function repayBorrowWithCToken(uint repayAmount) virtual external returns (uint);
function repayBorrowBehalfWithCToken(address borrower, uint repayAmount) virtual external returns (uint);
function liquidateBorrow(address borrower, uint repayAmount, CTokenInterface cTokenCollateral) virtual external returns (uint);
function sweepToken(EIP20NonStandardInterface token) virtual external;
/*** Admin Functions ***/
function _addReserves(uint addAmount) virtual external returns (uint);
}
contract CDelegationStorage {
/**
* @notice Implementation address for this contract
*/
address public implementation;
}
abstract contract CDelegatorInterface is CDelegationStorage {
/**
* @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) virtual external;
}
abstract contract CDelegateInterface is CDelegationStorage {
/**
* @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) virtual external;
/**
* @notice Called by the delegator on a delegate to forfeit its responsibility
*/
function _resignImplementation() virtual external;
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
/**
* @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 balance 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 success 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 success 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 success 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 remaining 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);
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
/**
* @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 balance 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 success 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 remaining 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);
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
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
}
/**
* @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 {
uint public constant NO_ERROR = 0; // support legacy return codes
error TransferComptrollerRejection(uint256 errorCode);
error TransferNotAllowed();
error TransferNotEnough();
error TransferTooMuch();
error MintComptrollerRejection(uint256 errorCode);
error MintFreshnessCheck();
error RedeemComptrollerRejection(uint256 errorCode);
error RedeemFreshnessCheck();
error RedeemTransferOutNotPossible();
error BorrowComptrollerRejection(uint256 errorCode);
error BorrowFreshnessCheck();
error BorrowCashNotAvailable();
error RepayBorrowComptrollerRejection(uint256 errorCode);
error RepayBorrowFreshnessCheck();
error LiquidateComptrollerRejection(uint256 errorCode);
error LiquidateFreshnessCheck();
error LiquidateCollateralFreshnessCheck();
error LiquidateAccrueBorrowInterestFailed(uint256 errorCode);
error LiquidateAccrueCollateralInterestFailed(uint256 errorCode);
error LiquidateLiquidatorIsBorrower();
error LiquidateCloseAmountIsZero();
error LiquidateCloseAmountIsUintMax();
error LiquidateRepayBorrowFreshFailed(uint256 errorCode);
error LiquidateSeizeComptrollerRejection(uint256 errorCode);
error LiquidateSeizeLiquidatorIsBorrower();
error AcceptAdminPendingAdminCheck();
error SetComptrollerOwnerCheck();
error SetPendingAdminOwnerCheck();
error SetReserveFactorAdminCheck();
error SetReserveFactorFreshCheck();
error SetReserveFactorBoundsCheck();
error AddReservesFactorFreshCheck(uint256 actualAddAmount);
error ReduceReservesAdminCheck();
error ReduceReservesFreshCheck();
error ReduceReservesCashNotAvailable();
error ReduceReservesCashValidation();
error SetInterestRateModelOwnerCheck();
error SetInterestRateModelFreshCheck();
error ZeroAddress();
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
/**
* @title Exponential module for storing fixed-precision decimals
* @author Compound
* @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 a + b;
}
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 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 a * b;
}
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 a / b;
}
function fraction(uint a, uint b) pure internal returns (Double memory) {
return Double({mantissa: div_(mul_(a, doubleScale), b)});
}
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
contract Comp {
/// @notice EIP-20 token name for this token
string public constant name = "Compound";
/// @notice EIP-20 token symbol for this token
string public constant symbol = "COMP";
/// @notice EIP-20 token decimals for this token
uint8 public constant decimals = 18;
/// @notice Total number of tokens in circulation
uint256 public constant totalSupply = 10000000e18; // 10 million Comp
/// @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 A record of states for signing / validating signatures
mapping(address => uint256) 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,
uint256 previousBalance,
uint256 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 Comp 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 (uint256)
{
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, uint256 rawAmount)
external
returns (bool)
{
uint96 amount;
if (rawAmount == type(uint256).max) {
amount = type(uint96).max;
} else {
amount = safe96(rawAmount, "Comp::approve: amount exceeds 96 bits");
}
allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
/**
* @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 (uint256) {
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, uint256 rawAmount) external returns (bool) {
uint96 amount = safe96(
rawAmount,
"Comp::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,
uint256 rawAmount
) external returns (bool) {
address spender = msg.sender;
uint96 spenderAllowance = allowances[src][spender];
uint96 amount = safe96(
rawAmount,
"Comp::approve: amount exceeds 96 bits"
);
if (spender != src && spenderAllowance != type(uint96).max) {
uint96 newAllowance = sub96(
spenderAllowance,
amount,
"Comp::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,
uint256 nonce,
uint256 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),
"Comp::delegateBySig: invalid signature"
);
require(
nonce == nonces[signatory]++,
"Comp::delegateBySig: invalid nonce"
);
require(
block.timestamp <= expiry,
"Comp::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, uint256 blockNumber)
public
view
returns (uint96)
{
require(
blockNumber < block.number,
"Comp::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),
"Comp::_transferTokens: cannot transfer from the zero address"
);
require(
dst != address(0),
"Comp::_transferTokens: cannot transfer to the zero address"
);
balances[src] = sub96(
balances[src],
amount,
"Comp::_transferTokens: transfer amount exceeds balance"
);
balances[dst] = add96(
balances[dst],
amount,
"Comp::_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,
"Comp::_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,
"Comp::_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,
"Comp::_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(uint256 n, string memory errorMessage)
internal
pure
returns (uint32)
{
require(n < 2**32, errorMessage);
return uint32(n);
}
function safe96(uint256 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 view returns (uint256) {
uint256 chainId;
assembly {
chainId := chainid()
}
return chainId;
}
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
/**
* @title Compound's InterestRateModel Interface
* @author Compound
*/
abstract 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 block
* @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 block (as a percentage, and scaled by 1e18)
*/
function getBorrowRate(uint cash, uint borrows, uint reserves) virtual external view returns (uint);
/**
* @notice Calculates the current supply interest rate per block
* @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 block (as a percentage, and scaled by 1e18)
*/
function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) virtual external view returns (uint);
}// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
interface IRewardVester {
function vestFor(address account, uint amount) external;
function isPaused() external view returns (bool);
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
import "./CToken.sol";
abstract contract PriceOracle {
/// @notice Indicator that this is a PriceOracle contract (for inspection)
bool public constant isPriceOracle = true;
/**
* @notice Get the underlying price of a cToken asset
* @param cToken The cToken to get the underlying price of
* @return The underlying asset price mantissa (scaled by 1e18).
* Zero means the price is unavailable.
*/
function getUnderlyingPrice(CToken cToken) virtual external view returns (uint);
}// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.20;
import "./ErrorReporter.sol";
import "./ComptrollerStorage.sol";
/**
* @title ComptrollerCore
* @dev Storage for the comptroller is at this address, while execution is delegated to the `comptrollerImplementation`.
* CTokens 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
*/
fallback() 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()) }
}
}
}{
"optimizer": {
"enabled": true,
"runs": 1000
},
"evmVersion": "shanghai",
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"action","type":"string"},{"indexed":false,"internalType":"bool","name":"pauseState","type":"bool"}],"name":"ActionPaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"contract CToken","name":"cToken","type":"address"},{"indexed":false,"internalType":"string","name":"action","type":"string"},{"indexed":false,"internalType":"bool","name":"pauseState","type":"bool"}],"name":"ActionPaused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"oldCompAccrued","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newCompAccrued","type":"uint256"}],"name":"CompAccruedAdjusted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"contract 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CToken[]","name":"cTokens","type":"address[]"},{"internalType":"bool","name":"borrowers","type":"bool"},{"internalType":"bool","name":"suppliers","type":"bool"}],"name":"claimComp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"}],"name":"claimComp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"closeFactorMantissa","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"compAccrued","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"compBorrowSpeeds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"compBorrowState","outputs":[{"internalType":"uint224","name":"index","type":"uint224"},{"internalType":"uint32","name":"block","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"compBorrowerIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"compContributorSpeeds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"compInitialIndex","outputs":[{"internalType":"uint224","name":"","type":"uint224"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"compRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"compReceivable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"compSpeeds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"compSupplierIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"compSupplySpeeds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"compSupplyState","outputs":[{"internalType":"uint224","name":"index","type":"uint224"},{"internalType":"uint32","name":"block","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"comptrollerImplementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"cTokens","type":"address[]"}],"name":"enterMarkets","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"cTokenAddress","type":"address"}],"name":"exitMarket","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"affectedUsers","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"fixBadAccruals","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getAccountLiquidity","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAllMarkets","outputs":[{"internalType":"contract CToken[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getAssetsIn","outputs":[{"internalType":"contract CToken[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBlockNumber","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCompAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"address","name":"cTokenModify","type":"address"},{"internalType":"uint256","name":"redeemTokens","type":"uint256"},{"internalType":"uint256","name":"borrowAmount","type":"uint256"}],"name":"getHypotheticalAccountLiquidity","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMsigAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVesterAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isComptroller","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract CToken","name":"cToken","type":"address"}],"name":"isDeprecated","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastContributorBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"cTokenBorrowed","type":"address"},{"internalType":"address","name":"cTokenCollateral","type":"address"},{"internalType":"address","name":"liquidator","type":"address"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"uint256","name":"repayAmount","type":"uint256"}],"name":"liquidateBorrowAllowed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"cTokenBorrowed","type":"address"},{"internalType":"address","name":"cTokenCollateral","type":"address"},{"internalType":"address","name":"liquidator","type":"address"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"uint256","name":"actualRepayAmount","type":"uint256"},{"internalType":"uint256","name":"seizeTokens","type":"uint256"}],"name":"liquidateBorrowVerify","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"cTokenBorrowed","type":"address"},{"internalType":"address","name":"cTokenCollateral","type":"address"},{"internalType":"uint256","name":"actualRepayAmount","type":"uint256"}],"name":"liquidateCalculateSeizeTokens","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"liquidationIncentiveMantissa","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"markets","outputs":[{"internalType":"bool","name":"isListed","type":"bool"},{"internalType":"uint256","name":"collateralFactorMantissa","type":"uint256"},{"internalType":"bool","name":"isComped","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxAssets","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"migrateComp","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"cToken","type":"address"},{"internalType":"address","name":"minter","type":"address"},{"internalType":"uint256","name":"mintAmount","type":"uint256"}],"name":"mintAllowed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"mintGuardianPaused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"cToken","type":"address"},{"internalType":"address","name":"minter","type":"address"},{"internalType":"uint256","name":"actualMintAmount","type":"uint256"},{"internalType":"uint256","name":"mintTokens","type":"uint256"}],"name":"mintVerify","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"oracle","outputs":[{"internalType":"contract PriceOracle","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pauseGuardian","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingComptrollerImplementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proposal65FixExecuted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"cToken","type":"address"},{"internalType":"address","name":"redeemer","type":"address"},{"internalType":"uint256","name":"redeemTokens","type":"uint256"}],"name":"redeemAllowed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"cToken","type":"address"},{"internalType":"address","name":"redeemer","type":"address"},{"internalType":"uint256","name":"redeemAmount","type":"uint256"},{"internalType":"uint256","name":"redeemTokens","type":"uint256"}],"name":"redeemVerify","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"cToken","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"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"cToken","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":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"cTokenCollateral","type":"address"},{"internalType":"address","name":"cTokenBorrowed","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"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"seizeGuardianPaused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"cTokenCollateral","type":"address"},{"internalType":"address","name":"cTokenBorrowed","type":"address"},{"internalType":"address","name":"liquidator","type":"address"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"uint256","name":"seizeTokens","type":"uint256"}],"name":"seizeVerify","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"supplyCapGuardian","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"supplyCaps","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"cToken","type":"address"},{"internalType":"address","name":"src","type":"address"},{"internalType":"address","name":"dst","type":"address"},{"internalType":"uint256","name":"transferTokens","type":"uint256"}],"name":"transferAllowed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"transferGuardianPaused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"cToken","type":"address"},{"internalType":"address","name":"src","type":"address"},{"internalType":"address","name":"dst","type":"address"},{"internalType":"uint256","name":"transferTokens","type":"uint256"}],"name":"transferVerify","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"contributor","type":"address"}],"name":"updateContributorRewards","outputs":[],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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Net Worth in USD
$0.00
Net Worth in S
Multichain Portfolio | 35 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.