Contract
Contract Overview
Balance:
0 Ether
More Info
My Name Tag:
Not Available
| Txn Hash |
Method
|
Block
|
From
|
To
|
Value | ||||
|---|---|---|---|---|---|---|---|---|---|
| 0x937aa33875b1f84716523fa7bfb2ed7f7fda1d2d0b06a367ac8f1bb69bb0a773 | 0x60806040 | 8036571 | 511 days 15 hrs ago | 0x32b230795ab78ab51ea7b3f15a23a762aaecd3e0 | IN | Create: ClaimCalc | 0 Ether | 0.01810569 |
[ Download CSV Export ]
Contract Name:
ClaimCalc
Compiler Version
v0.7.4+commit.3f05b770
Contract Source Code (Solidity Standard Json-Input format)
pragma solidity ^0.7.4;
/**
* @title Careful Math
* @author DeFiPie
* @notice Derived from OpenZeppelin's SafeMath library
* https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/math/SafeMath.sol
*/
contract CarefulMath {
/**
* @dev Possible error codes that we can return
*/
enum MathError {
NO_ERROR,
DIVISION_BY_ZERO,
INTEGER_OVERFLOW,
INTEGER_UNDERFLOW
}
/**
* @dev Multiplies two numbers, returns an error on overflow.
*/
function mulUInt(uint a, uint b) internal pure returns (MathError, uint) {
if (a == 0) {
return (MathError.NO_ERROR, 0);
}
uint c = a * b;
if (c / a != b) {
return (MathError.INTEGER_OVERFLOW, 0);
} else {
return (MathError.NO_ERROR, c);
}
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function divUInt(uint a, uint b) internal pure returns (MathError, uint) {
if (b == 0) {
return (MathError.DIVISION_BY_ZERO, 0);
}
return (MathError.NO_ERROR, a / b);
}
/**
* @dev Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend).
*/
function subUInt(uint a, uint b) internal pure returns (MathError, uint) {
if (b <= a) {
return (MathError.NO_ERROR, a - b);
} else {
return (MathError.INTEGER_UNDERFLOW, 0);
}
}
/**
* @dev Adds two numbers, returns an error on overflow.
*/
function addUInt(uint a, uint b) internal pure returns (MathError, uint) {
uint c = a + b;
if (c >= a) {
return (MathError.NO_ERROR, c);
} else {
return (MathError.INTEGER_OVERFLOW, 0);
}
}
/**
* @dev add a and b and then subtract c
*/
function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) {
(MathError err0, uint sum) = addUInt(a, b);
if (err0 != MathError.NO_ERROR) {
return (err0, 0);
}
return subUInt(sum, c);
}
}pragma solidity ^0.7.4;
import "./ErrorReporter.sol";
import "./Exponential.sol";
import "./PriceOracle.sol";
import "./ControllerInterface.sol";
import "./ControllerStorage.sol";
import "./PTokenInterfaces.sol";
import "./EIP20Interface.sol";
import "./Unitroller.sol";
/**
* @title DeFiPie's Controller Contract
* @author DeFiPie
*/
contract Controller is ControllerStorage, ControllerInterface, ControllerErrorReporter, Exponential {
/// @notice Emitted when an admin supports a market
event MarketListed(address pToken);
/// @notice Emitted when an account enters a market
event MarketEntered(address pToken, address account);
/// @notice Emitted when an account exits a market
event MarketExited(address pToken, address account);
/// @notice Emitted when close factor is changed by admin
event NewCloseFactor(uint oldCloseFactorMantissa, uint newCloseFactorMantissa);
/// @notice Emitted when a collateral factor is changed by admin
event NewCollateralFactor(address pToken, uint oldCollateralFactorMantissa, uint newCollateralFactorMantissa);
/// @notice Emitted when liquidation incentive is changed by admin
event NewLiquidationIncentive(uint oldLiquidationIncentiveMantissa, uint newLiquidationIncentiveMantissa);
/// @notice Emitted when maxAssets is changed by admin
event NewMaxAssets(uint oldMaxAssets, uint newMaxAssets);
/// @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(address pToken, string action, bool pauseState);
/// @notice Emitted when market pieed status is changed
event MarketPied(address pToken, bool isPied);
/// @notice Emitted when PIE rate is changed
event NewPieRate(uint oldPieRate, uint newPieRate);
/// @notice Emitted when a new PIE speed is calculated for a market
event PieSpeedUpdated(address indexed pToken, uint newSpeed);
/// @notice Emitted when PIE is distributed to a supplier
event DistributedSupplierPie(address indexed pToken, address indexed supplier, uint pieDelta, uint pieSupplyIndex);
/// @notice Emitted when PIE is distributed to a borrower
event DistributedBorrowerPie(address indexed pToken, address indexed borrower, uint pieDelta, uint pieBorrowIndex);
/// @notice The threshold above which the flywheel transfers PIE, in wei
uint public constant pieClaimThreshold = 0.001e18;
/// @notice The initial PIE index for a market
uint224 public constant pieInitialIndex = 1e36;
// closeFactorMantissa must be strictly greater than this value
uint internal constant closeFactorMinMantissa = 0.05e18; // 0.05
// closeFactorMantissa must not exceed this value
uint internal constant closeFactorMaxMantissa = 0.9e18; // 0.9
// No collateralFactorMantissa may exceed this value
uint internal constant collateralFactorMaxMantissa = 0.9e18; // 0.9
// liquidationIncentiveMantissa must be no less than this value
uint internal constant liquidationIncentiveMinMantissa = 1.0e18; // 1.0
// liquidationIncentiveMantissa must be no greater than this value
uint internal constant liquidationIncentiveMaxMantissa = 1.5e18; // 1.5
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 (address[] memory) {
address[] 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 pToken The pToken to check
* @return True if the account is in the asset, otherwise false.
*/
function checkMembership(address account, address pToken) external view returns (bool) {
return markets[pToken].accountMembership[account];
}
/**
* @notice Add assets to be included in account liquidity calculation
* @param pTokens The list of addresses of the pToken markets to be enabled
* @return Success indicator for whether each corresponding market was entered
*/
function enterMarkets(address[] memory pTokens) public override returns (uint[] memory) {
uint len = pTokens.length;
uint[] memory results = new uint[](len);
for (uint i = 0; i < len; i++) {
address pToken = pTokens[i];
results[i] = uint(addToMarketInternal(pToken, msg.sender));
}
return results;
}
/**
* @notice Add the market to the borrower's "assets in" for liquidity calculations
* @param pToken The market to enter
* @param borrower The address of the account to modify
* @return Success indicator for whether the market was entered
*/
function addToMarketInternal(address pToken, address borrower) internal returns (Error) {
Market storage marketToJoin = markets[pToken];
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;
}
if (accountAssets[borrower].length >= maxAssets) {
// no space, cannot join
return Error.TOO_MANY_ASSETS;
}
// 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(pToken);
emit MarketEntered(pToken, 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 neccessary collateral for an outstanding borrow.
* @param pTokenAddress The address of the asset to be removed
* @return Whether or not the account successfully exited the market
*/
function exitMarket(address pTokenAddress) external override returns (uint) {
address pToken = pTokenAddress;
/* Get sender tokensHeld and amountOwed underlying from the pToken */
(uint oErr, uint tokensHeld, uint amountOwed, ) = PTokenInterface(pToken).getAccountSnapshot(msg.sender);
require(oErr == 0, "exitMarket: getAccountSnapshot failed"); // semi-opaque error code
/* Fail if the sender has a borrow balance */
if (amountOwed != 0) {
return fail(Error.NONZERO_BORROW_BALANCE, FailureInfo.EXIT_MARKET_BALANCE_OWED);
}
/* Fail if the sender is not permitted to redeem all of their tokens */
uint allowed = redeemAllowedInternal(pTokenAddress, msg.sender, tokensHeld);
if (allowed != 0) {
return failOpaque(Error.REJECTION, FailureInfo.EXIT_MARKET_REJECTION, allowed);
}
Market storage marketToExit = markets[pToken];
/* Return true if the sender is not already ‘in’ the market */
if (!marketToExit.accountMembership[msg.sender]) {
return uint(Error.NO_ERROR);
}
/* Set pToken account membership to false */
delete marketToExit.accountMembership[msg.sender];
/* Delete pToken from the account’s list of assets */
// load into memory for faster iteration
address[] memory userAssetList = accountAssets[msg.sender];
uint len = userAssetList.length;
uint assetIndex = len;
for (uint i = 0; i < len; i++) {
if (userAssetList[i] == pToken) {
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
address[] storage storedList = accountAssets[msg.sender];
storedList[assetIndex] = storedList[storedList.length - 1];
storedList.pop(); //storedList.length--;
emit MarketExited(pToken, msg.sender);
return uint(Error.NO_ERROR);
}
/*** Policy Hooks ***/
/**
* @notice Checks if the account should be allowed to mint tokens in the given market
* @param pToken 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 pToken, address minter, uint mintAmount) external override returns (uint) {
// Pausing is a very serious situation - we revert to sound the alarms
require(!mintGuardianPaused[pToken], "mint is paused");
// Shh - currently unused
minter;
mintAmount;
if (!markets[pToken].isListed) {
return uint(Error.MARKET_NOT_LISTED);
}
// Keep the flywheel moving
updatePieSupplyIndex(pToken);
distributeSupplierPie(pToken, minter, false);
return uint(Error.NO_ERROR);
}
/**
* @notice Checks if the account should be allowed to redeem tokens in the given market
* @param pToken The market to verify the redeem against
* @param redeemer The account which would redeem the tokens
* @param redeemTokens The number of pTokens 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 pToken, address redeemer, uint redeemTokens) external override returns (uint) {
uint allowed = redeemAllowedInternal(pToken, redeemer, redeemTokens);
if (allowed != uint(Error.NO_ERROR)) {
return allowed;
}
// Keep the flywheel moving
updatePieSupplyIndex(pToken);
distributeSupplierPie(pToken, redeemer, false);
return uint(Error.NO_ERROR);
}
function redeemAllowedInternal(address pToken, address redeemer, uint redeemTokens) internal view returns (uint) {
if (!markets[pToken].isListed) {
return uint(Error.MARKET_NOT_LISTED);
}
/* If the redeemer is not 'in' the market, then we can bypass the liquidity check */
if (!markets[pToken].accountMembership[redeemer]) {
return uint(Error.NO_ERROR);
}
/* Otherwise, perform a hypothetical liquidity check to guard against shortfall */
(Error err, , uint shortfall) = getHypotheticalAccountLiquidityInternal(redeemer, pToken, redeemTokens, 0);
if (err != Error.NO_ERROR) {
return uint(err);
}
if (shortfall > 0) {
return uint(Error.INSUFFICIENT_LIQUIDITY);
}
return uint(Error.NO_ERROR);
}
/**
* @notice Validates redeem and reverts on rejection. May emit logs.
* @param pToken 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 pToken, address redeemer, uint redeemAmount, uint redeemTokens) external override {
// Shh - currently unused
// pToken;
// redeemer;
// Require tokens is zero or amount is also zero
if (redeemTokens == 0 && redeemAmount > 0) {
revert("redeemTokens zero");
}
}
/**
* @notice Checks if the account should be allowed to borrow the underlying asset of the given market
* @param pToken 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 pToken, address borrower, uint borrowAmount) external override returns (uint) {
// Pausing is a very serious situation - we revert to sound the alarms
require(!borrowGuardianPaused[pToken], "borrow is paused");
if (!markets[pToken].isListed) {
return uint(Error.MARKET_NOT_LISTED);
}
Error err;
if (!markets[pToken].accountMembership[borrower]) {
// only pTokens may call borrowAllowed if borrower not in market
require(msg.sender == pToken, "sender must be pToken");
// attempt to add borrower to the market
err = addToMarketInternal(msg.sender, borrower);
if (err != Error.NO_ERROR) {
return uint(err);
}
// it should be impossible to break the important invariant
assert(markets[pToken].accountMembership[borrower]);
}
if (oracle.getUnderlyingPrice(pToken) == 0) {
return uint(Error.PRICE_ERROR);
}
uint shortfall;
(err, , shortfall) = getHypotheticalAccountLiquidityInternal(borrower, pToken, 0, borrowAmount);
if (err != Error.NO_ERROR) {
return uint(err);
}
if (shortfall > 0) {
return uint(Error.INSUFFICIENT_LIQUIDITY);
}
// Keep the flywheel moving
Exp memory borrowIndex = Exp({mantissa: PTokenInterface(pToken).borrowIndex()});
updatePieBorrowIndex(pToken, borrowIndex);
distributeBorrowerPie(pToken, borrower, borrowIndex, false);
return uint(Error.NO_ERROR);
}
/**
* @notice Checks if the account should be allowed to repay a borrow in the given market
* @param pToken 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 pToken,
address payer,
address borrower,
uint repayAmount
) external override returns (uint) {
// Shh - currently unused
// payer;
// borrower;
// repayAmount;
if (!markets[pToken].isListed) {
return uint(Error.MARKET_NOT_LISTED);
}
// Keep the flywheel moving
Exp memory borrowIndex = Exp({mantissa: PTokenInterface(pToken).borrowIndex()});
updatePieBorrowIndex(pToken, borrowIndex);
distributeBorrowerPie(pToken, borrower, borrowIndex, false);
return uint(Error.NO_ERROR);
}
/**
* @notice Checks if the liquidation should be allowed to occur
* @param pTokenBorrowed Asset which was borrowed by the borrower
* @param pTokenCollateral 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 pTokenBorrowed,
address pTokenCollateral,
address liquidator,
address borrower,
uint repayAmount
) external override returns (uint) {
// Shh - currently unused
liquidator;
if (!markets[pTokenBorrowed].isListed || !markets[pTokenCollateral].isListed) {
return uint(Error.MARKET_NOT_LISTED);
}
/* The borrower must have shortfall in order to be liquidatable */
(Error err, , uint shortfall) = getAccountLiquidityInternal(borrower);
if (err != Error.NO_ERROR) {
return uint(err);
}
if (shortfall == 0) {
return uint(Error.INSUFFICIENT_SHORTFALL);
}
/* The liquidator may not repay more than what is allowed by the closeFactor */
uint borrowBalance = PTokenInterface(pTokenBorrowed).borrowBalanceStored(borrower);
(MathError mathErr, uint maxClose) = mulScalarTruncate(Exp({mantissa: closeFactorMantissa}), borrowBalance);
if (mathErr != MathError.NO_ERROR) {
return uint(Error.MATH_ERROR);
}
if (repayAmount > maxClose) {
return uint(Error.TOO_MUCH_REPAY);
}
return uint(Error.NO_ERROR);
}
/**
* @notice Checks if the seizing of assets should be allowed to occur
* @param pTokenCollateral Asset which was used as collateral and will be seized
* @param pTokenBorrowed 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 pTokenCollateral,
address pTokenBorrowed,
address liquidator,
address borrower,
uint seizeTokens
) external override returns (uint) {
// Pausing is a very serious situation - we revert to sound the alarms
require(!seizeGuardianPaused, "seize is paused");
// Shh - currently unused
// seizeTokens;
if (!markets[pTokenCollateral].isListed || !markets[pTokenBorrowed].isListed) {
return uint(Error.MARKET_NOT_LISTED);
}
if (PTokenInterface(pTokenCollateral).controller() != PTokenInterface(pTokenBorrowed).controller()) {
return uint(Error.CONTROLLER_MISMATCH);
}
// Keep the flywheel moving
updatePieSupplyIndex(pTokenCollateral);
distributeSupplierPie(pTokenCollateral, borrower, false);
distributeSupplierPie(pTokenCollateral, liquidator, false);
return uint(Error.NO_ERROR);
}
/**
* @notice Checks if the account should be allowed to transfer tokens in the given market
* @param pToken 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 pTokens to transfer
* @return 0 if the transfer is allowed, otherwise a semi-opaque error code (See ErrorReporter.sol)
*/
function transferAllowed(
address pToken,
address src,
address dst,
uint transferTokens
) external override returns (uint) {
// Pausing is a very serious situation - we revert to sound the alarms
require(!transferGuardianPaused, "transfer is paused");
// Currently the only consideration is whether or not
// the src is allowed to redeem this many tokens
uint allowed = redeemAllowedInternal(pToken, src, transferTokens);
if (allowed != uint(Error.NO_ERROR)) {
return allowed;
}
// Keep the flywheel moving
updatePieSupplyIndex(pToken);
distributeSupplierPie(pToken, src, false);
distributeSupplierPie(pToken, dst, false);
return uint(Error.NO_ERROR);
}
/*** Liquidity/Liquidation Calculations ***/
/**
* @dev Local vars for avoiding stack-depth limits in calculating account liquidity.
* Note that `pTokenBalance` is the number of pTokens the account owns in the market,
* whereas `borrowBalance` is the amount of underlying that the account has borrowed.
*/
struct AccountLiquidityLocalVars {
uint sumCollateral;
uint sumBorrowPlusEffects;
uint pTokenBalance;
uint borrowBalance;
uint exchangeRateMantissa;
uint oraclePriceMantissa;
Exp collateralFactor;
Exp exchangeRate;
Exp oraclePrice;
Exp tokensToDenom;
}
/**
* @notice Determine the current account liquidity wrt collateral requirements
* @return (possible error code (semi-opaque),
account liquidity in excess of collateral requirements,
* account shortfall below collateral requirements)
*/
function getAccountLiquidity(address account) public view returns (uint, uint, uint) {
(Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, address(0), 0, 0);
return (uint(err), liquidity, shortfall);
}
/**
* @notice Determine the current account liquidity wrt collateral requirements
* @return (possible error code,
account liquidity in excess of collateral requirements,
* account shortfall below collateral requirements)
*/
function getAccountLiquidityInternal(address account) internal view returns (Error, uint, uint) {
return getHypotheticalAccountLiquidityInternal(account, address(0), 0, 0);
}
/**
* @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed
* @param pTokenModify 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 pTokenModify,
uint redeemTokens,
uint borrowAmount
) public view virtual returns (uint, uint, uint) {
(Error err, uint liquidity, uint shortfall) = getHypotheticalAccountLiquidityInternal(account, pTokenModify, redeemTokens, borrowAmount);
return (uint(err), liquidity, shortfall);
}
/**
* @notice Determine what the account liquidity would be if the given amounts were redeemed/borrowed
* @param pTokenModify 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 pToken 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,
address pTokenModify,
uint redeemTokens,
uint borrowAmount
) internal view returns (Error, uint, uint) {
AccountLiquidityLocalVars memory vars; // Holds all our calculation results
uint oErr;
MathError mErr;
// For each asset the account is in
address[] memory assets = accountAssets[account];
for (uint i = 0; i < assets.length; i++) {
address asset = assets[i];
// Read the balances and exchange rate from the pToken
(oErr, vars.pTokenBalance, vars.borrowBalance, vars.exchangeRateMantissa) = PTokenInterface(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)
(mErr, vars.tokensToDenom) = mulExp3(vars.collateralFactor, vars.exchangeRate, vars.oraclePrice);
if (mErr != MathError.NO_ERROR) {
return (Error.MATH_ERROR, 0, 0);
}
// sumCollateral += tokensToDenom * pTokenBalance
(mErr, vars.sumCollateral) = mulScalarTruncateAddUInt(vars.tokensToDenom, vars.pTokenBalance, vars.sumCollateral);
if (mErr != MathError.NO_ERROR) {
return (Error.MATH_ERROR, 0, 0);
}
// sumBorrowPlusEffects += oraclePrice * borrowBalance
(mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, vars.borrowBalance, vars.sumBorrowPlusEffects);
if (mErr != MathError.NO_ERROR) {
return (Error.MATH_ERROR, 0, 0);
}
// Calculate effects of interacting with pTokenModify
if (asset == pTokenModify) {
// redeem effect
// sumBorrowPlusEffects += tokensToDenom * redeemTokens
(mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.tokensToDenom, redeemTokens, vars.sumBorrowPlusEffects);
if (mErr != MathError.NO_ERROR) {
return (Error.MATH_ERROR, 0, 0);
}
// borrow effect
// sumBorrowPlusEffects += oraclePrice * borrowAmount
(mErr, vars.sumBorrowPlusEffects) = mulScalarTruncateAddUInt(vars.oraclePrice, borrowAmount, vars.sumBorrowPlusEffects);
if (mErr != MathError.NO_ERROR) {
return (Error.MATH_ERROR, 0, 0);
}
}
}
// 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 pToken.liquidateBorrowFresh)
* @param pTokenBorrowed The address of the borrowed pToken
* @param pTokenCollateral The address of the collateral pToken
* @param actualRepayAmount The amount of pTokenBorrowed underlying to convert into pTokenCollateral tokens
* @return (errorCode, number of pTokenCollateral tokens to be seized in a liquidation)
*/
function liquidateCalculateSeizeTokens(
address pTokenBorrowed,
address pTokenCollateral,
uint actualRepayAmount
) external view override returns (uint, uint) {
/* Read oracle prices for borrowed and collateral markets */
uint priceBorrowedMantissa = oracle.getUnderlyingPrice(pTokenBorrowed);
uint priceCollateralMantissa = oracle.getUnderlyingPrice(pTokenCollateral);
if (priceBorrowedMantissa == 0 || priceCollateralMantissa == 0) {
return (uint(Error.PRICE_ERROR), 0);
}
/*
* Get the exchange rate and calculate the number of collateral tokens to seize:
* seizeAmount = actualRepayAmount * liquidationIncentive * priceBorrowed / priceCollateral
* seizeTokens = seizeAmount / exchangeRate
* = actualRepayAmount * (liquidationIncentive * priceBorrowed) / (priceCollateral * exchangeRate)
*/
uint exchangeRateMantissa = PTokenInterface(pTokenCollateral).exchangeRateStored(); // Note: reverts on error
uint seizeTokens;
Exp memory numerator;
Exp memory denominator;
Exp memory ratio;
MathError mathErr;
(mathErr, numerator) = mulExp(liquidationIncentiveMantissa, priceBorrowedMantissa);
if (mathErr != MathError.NO_ERROR) {
return (uint(Error.MATH_ERROR), 0);
}
(mathErr, denominator) = mulExp(priceCollateralMantissa, exchangeRateMantissa);
if (mathErr != MathError.NO_ERROR) {
return (uint(Error.MATH_ERROR), 0);
}
(mathErr, ratio) = divExp(numerator, denominator);
if (mathErr != MathError.NO_ERROR) {
return (uint(Error.MATH_ERROR), 0);
}
(mathErr, seizeTokens) = mulScalarTruncate(ratio, actualRepayAmount);
if (mathErr != MathError.NO_ERROR) {
return (uint(Error.MATH_ERROR), 0);
}
return (uint(Error.NO_ERROR), seizeTokens);
}
/*** Admin Functions ***/
/**
* @notice Sets a new price oracle for the controller
* @dev Admin function to set a new price oracle
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setPriceOracle(PriceOracle newOracle) public returns (uint) {
// Check caller is admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_PRICE_ORACLE_OWNER_CHECK);
}
// Track the old oracle for the controller
PriceOracle oldOracle = oracle;
// Set controller's oracle to newOracle
oracle = newOracle;
// Emit NewPriceOracle(oldOracle, newOracle)
emit NewPriceOracle(oldOracle, newOracle);
return uint(Error.NO_ERROR);
}
/**
* @notice Sets a PIE address for the controller
* @return uint 0=success
*/
function _setPieAddress(address pieAddress_) public returns (uint) {
require(msg.sender == admin && pieAddress == address(0),"pie address may only be initialized once");
pieAddress = pieAddress_;
return uint(Error.NO_ERROR);
}
/**
* @notice Sets the closeFactor used when liquidating borrows
* @dev Admin function to set closeFactor
* @param newCloseFactorMantissa New close factor, scaled by 1e18
* @return uint 0=success, otherwise a failure. (See ErrorReporter for details)
*/
function _setCloseFactor(uint newCloseFactorMantissa) external returns (uint) {
// Check caller is admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_CLOSE_FACTOR_OWNER_CHECK);
}
Exp memory newCloseFactorExp = Exp({mantissa: newCloseFactorMantissa});
Exp memory lowLimit = Exp({mantissa: closeFactorMinMantissa});
if (lessThanOrEqualExp(newCloseFactorExp, lowLimit)) {
return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION);
}
Exp memory highLimit = Exp({mantissa: closeFactorMaxMantissa});
if (lessThanExp(highLimit, newCloseFactorExp)) {
return fail(Error.INVALID_CLOSE_FACTOR, FailureInfo.SET_CLOSE_FACTOR_VALIDATION);
}
uint oldCloseFactorMantissa = closeFactorMantissa;
closeFactorMantissa = newCloseFactorMantissa;
emit NewCloseFactor(oldCloseFactorMantissa, closeFactorMantissa);
return uint(Error.NO_ERROR);
}
/**
* @notice Sets the collateralFactor for a market
* @dev Admin function to set per-market collateralFactor
* @param pToken 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(address pToken, uint newCollateralFactorMantissa) external returns (uint) {
// Check caller is admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_COLLATERAL_FACTOR_OWNER_CHECK);
}
// Verify market is listed
Market storage market = markets[pToken];
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);
}
oracle.updateUnderlyingPrice(pToken);
// If collateral factor != 0, fail if price == 0
if (newCollateralFactorMantissa != 0 && oracle.getUnderlyingPrice(pToken) == 0) {
return fail(Error.PRICE_ERROR, FailureInfo.SET_COLLATERAL_FACTOR_WITHOUT_PRICE);
}
// Set market's collateral factor to new collateral factor, remember old value
uint oldCollateralFactorMantissa = market.collateralFactorMantissa;
market.collateralFactorMantissa = newCollateralFactorMantissa;
// Emit event with asset, old collateral factor, and new collateral factor
emit NewCollateralFactor(pToken, oldCollateralFactorMantissa, newCollateralFactorMantissa);
return uint(Error.NO_ERROR);
}
/**
* @notice Sets maxAssets which controls how many markets can be entered
* @dev Admin function to set maxAssets
* @param newMaxAssets New max assets
* @return uint 0=success, otherwise a failure. (See ErrorReporter for details)
*/
function _setMaxAssets(uint newMaxAssets) external returns (uint) {
// Check caller is admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_MAX_ASSETS_OWNER_CHECK);
}
uint oldMaxAssets = maxAssets;
maxAssets = newMaxAssets;
emit NewMaxAssets(oldMaxAssets, newMaxAssets);
return uint(Error.NO_ERROR);
}
/**
* @notice Sets liquidationIncentive
* @dev Admin function to set liquidationIncentive
* @param newLiquidationIncentiveMantissa New liquidationIncentive scaled by 1e18
* @return uint 0=success, otherwise a failure. (See ErrorReporter for details)
*/
function _setLiquidationIncentive(uint newLiquidationIncentiveMantissa) external returns (uint) {
// Check caller is admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_LIQUIDATION_INCENTIVE_OWNER_CHECK);
}
// Check de-scaled min <= newLiquidationIncentive <= max
Exp memory newLiquidationIncentive = Exp({mantissa: newLiquidationIncentiveMantissa});
Exp memory minLiquidationIncentive = Exp({mantissa: liquidationIncentiveMinMantissa});
if (lessThanExp(newLiquidationIncentive, minLiquidationIncentive)) {
return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION);
}
Exp memory maxLiquidationIncentive = Exp({mantissa: liquidationIncentiveMaxMantissa});
if (lessThanExp(maxLiquidationIncentive, newLiquidationIncentive)) {
return fail(Error.INVALID_LIQUIDATION_INCENTIVE, FailureInfo.SET_LIQUIDATION_INCENTIVE_VALIDATION);
}
// Save current value for use in log
uint oldLiquidationIncentiveMantissa = liquidationIncentiveMantissa;
// Set liquidation incentive to new incentive
liquidationIncentiveMantissa = newLiquidationIncentiveMantissa;
// Emit event with old incentive, new incentive
emit NewLiquidationIncentive(oldLiquidationIncentiveMantissa, newLiquidationIncentiveMantissa);
return uint(Error.NO_ERROR);
}
/**
* @notice Add the market to the markets mapping and set it as listed
* @dev Admin function to set isListed and add support for the market
* @param pToken The address of the market (token) to list
* @return uint 0=success, otherwise a failure. (See enum Error for details)
*/
function _supportMarket(address pToken) external returns (uint) {
if (msg.sender != admin && msg.sender != factory) {
return fail(Error.UNAUTHORIZED, FailureInfo.SUPPORT_MARKET_OWNER_CHECK);
}
if (markets[pToken].isListed) {
return fail(Error.MARKET_ALREADY_LISTED, FailureInfo.SUPPORT_MARKET_EXISTS);
}
PTokenInterface(pToken).isPToken(); // Sanity check to make sure its really a PToken
_addMarketInternal(pToken);
Market storage newMarket = markets[pToken];
newMarket.isListed = true;
emit MarketListed(pToken);
return uint(Error.NO_ERROR);
}
function _addMarketInternal(address pToken) internal {
require(markets[pToken].isListed == false, "market already added");
allMarkets.push(pToken);
}
/**
* @notice Admin function to change the Pause Guardian
* @param newPauseGuardian The address of the new Pause Guardian
* @return uint 0=success, otherwise a failure. (See enum Error for details)
*/
function _setPauseGuardian(address newPauseGuardian) public returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_PAUSE_GUARDIAN_OWNER_CHECK);
}
// Save current value for inclusion in log
address oldPauseGuardian = pauseGuardian;
// Store pauseGuardian with value newPauseGuardian
pauseGuardian = newPauseGuardian;
// Emit NewPauseGuardian(OldPauseGuardian, NewPauseGuardian)
emit NewPauseGuardian(oldPauseGuardian, pauseGuardian);
return uint(Error.NO_ERROR);
}
function _setMintPaused(address pToken, bool state) public returns (bool) {
require(markets[pToken].isListed, "cannot pause a market that is not listed");
require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause");
require(msg.sender == admin || state == true, "only admin can unpause");
mintGuardianPaused[pToken] = state;
emit ActionPaused(pToken, "Mint", state);
return state;
}
function _setBorrowPaused(address pToken, bool state) public returns (bool) {
require(markets[pToken].isListed, "cannot pause a market that is not listed");
require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause");
require(msg.sender == admin || state == true, "only admin can unpause");
borrowGuardianPaused[pToken] = state;
emit ActionPaused(pToken, "Borrow", state);
return state;
}
function _setTransferPaused(bool state) public returns (bool) {
require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause");
require(msg.sender == admin || state == true, "only admin can unpause");
transferGuardianPaused = state;
emit ActionPaused("Transfer", state);
return state;
}
function _setSeizePaused(bool state) public returns (bool) {
require(msg.sender == pauseGuardian || msg.sender == admin, "only pause guardian and admin can pause");
require(msg.sender == admin || state == true, "only admin can unpause");
seizeGuardianPaused = state;
emit ActionPaused("Seize", state);
return state;
}
function _setFactoryContract(address _factory) external returns (uint) {
if (msg.sender != admin) {
return uint(Error.UNAUTHORIZED);
}
factory = _factory;
return uint(Error.NO_ERROR);
}
function _become(address payable unitroller) public {
require(msg.sender == Unitroller(unitroller).admin(), "only unitroller admin can change brains");
require(Unitroller(unitroller)._acceptImplementation() == 0, "change not authorized");
}
/*** Pie Distribution ***/
function refreshPieSpeeds() public {
require(msg.sender == tx.origin, "only externally owned accounts may refresh speeds");
refreshPieSpeedsInternal();
}
/**
* @notice Recalculate and update PIE speeds for all PIE markets
*/
function refreshPieSpeedsInternal() internal {
address[] memory allMarkets_ = allMarkets;
for (uint i = 0; i < allMarkets_.length; i++) {
address pToken = allMarkets_[i];
Exp memory borrowIndex = Exp({mantissa: PTokenInterface(pToken).borrowIndex()});
updatePieSupplyIndex(pToken);
updatePieBorrowIndex(pToken, borrowIndex);
}
Exp memory totalUtility = Exp({mantissa: 0});
Exp[] memory utilities = new Exp[](allMarkets_.length);
for (uint i = 0; i < allMarkets_.length; i++) {
address pToken = allMarkets_[i];
if (markets[pToken].isPied) {
oracle.updateUnderlyingPrice(pToken);
Exp memory assetPrice = Exp({mantissa: oracle.getUnderlyingPrice(pToken)});
Exp memory interestPerBlock = mul_(Exp({mantissa: PTokenInterface(pToken).borrowRatePerBlock()}), PTokenInterface(pToken).totalBorrows());
Exp memory utility = mul_(interestPerBlock, assetPrice);
utilities[i] = utility;
totalUtility = add_(totalUtility, utility);
}
}
for (uint i = 0; i < allMarkets_.length; i++) {
address pToken = allMarkets[i];
uint newSpeed = totalUtility.mantissa > 0 ? mul_(pieRate, div_(utilities[i], totalUtility)) : 0;
pieSpeeds[pToken] = newSpeed;
emit PieSpeedUpdated(pToken, newSpeed);
}
}
/**
* @notice Accrue PIE to the market by updating the supply index
* @param pToken The market whose supply index to update
*/
function updatePieSupplyIndex(address pToken) internal {
PieMarketState storage supplyState = pieSupplyState[pToken];
uint supplySpeed = pieSpeeds[pToken];
uint blockNumber = getBlockNumber();
uint deltaBlocks = sub_(blockNumber, uint(supplyState.block));
if (deltaBlocks > 0 && supplySpeed > 0) {
uint supplyTokens = PTokenInterface(pToken).totalSupply();
uint pieAccrued = mul_(deltaBlocks, supplySpeed);
Double memory ratio = supplyTokens > 0 ? fraction(pieAccrued, supplyTokens) : Double({mantissa: 0});
Double memory index = add_(Double({mantissa: supplyState.index}), ratio);
pieSupplyState[pToken] = PieMarketState({
index: safe224(index.mantissa, "new index exceeds 224 bits"),
block: safe32(blockNumber, "block number exceeds 32 bits")
});
}
}
/**
* @notice Accrue PIE to the market by updating the borrow index
* @param pToken The market whose borrow index to update
*/
function updatePieBorrowIndex(address pToken, Exp memory marketBorrowIndex) internal {
PieMarketState storage borrowState = pieBorrowState[pToken];
uint borrowSpeed = pieSpeeds[pToken];
uint blockNumber = getBlockNumber();
uint deltaBlocks = sub_(blockNumber, uint(borrowState.block));
if (deltaBlocks > 0 && borrowSpeed > 0) {
uint borrowAmount = div_(PTokenInterface(pToken).totalBorrows(), marketBorrowIndex);
uint pieAccrued = mul_(deltaBlocks, borrowSpeed);
Double memory ratio = borrowAmount > 0 ? fraction(pieAccrued, borrowAmount) : Double({mantissa: 0});
Double memory index = add_(Double({mantissa: borrowState.index}), ratio);
pieBorrowState[pToken] = PieMarketState({
index: safe224(index.mantissa, "new index exceeds 224 bits"),
block: safe32(blockNumber, "block number exceeds 32 bits")
});
}
}
/**
* @notice Calculate PIE accrued by a supplier and possibly transfer it to them
* @param pToken The market in which the supplier is interacting
* @param supplier The address of the supplier to distribute PIE to
*/
function distributeSupplierPie(address pToken, address supplier, bool distributeAll) internal {
PieMarketState storage supplyState = pieSupplyState[pToken];
Double memory supplyIndex = Double({mantissa: supplyState.index});
Double memory supplierIndex = Double({mantissa: pieSupplierIndex[pToken][supplier]});
pieSupplierIndex[pToken][supplier] = supplyIndex.mantissa;
if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) {
supplierIndex.mantissa = pieInitialIndex;
}
Double memory deltaIndex = sub_(supplyIndex, supplierIndex);
uint supplierTokens = PTokenInterface(pToken).balanceOf(supplier);
uint supplierDelta = mul_(supplierTokens, deltaIndex);
uint supplierAccrued = add_(pieAccrued[supplier], supplierDelta);
pieAccrued[supplier] = transferPie(supplier, supplierAccrued, distributeAll ? 0 : pieClaimThreshold);
emit DistributedSupplierPie(pToken, supplier, supplierDelta, supplyIndex.mantissa);
}
/**
* @notice Calculate PIE 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 pToken The market in which the borrower is interacting
* @param borrower The address of the borrower to distribute PIE to
*/
function distributeBorrowerPie(
address pToken,
address borrower,
Exp memory marketBorrowIndex,
bool distributeAll
) internal {
PieMarketState storage borrowState = pieBorrowState[pToken];
Double memory borrowIndex = Double({mantissa: borrowState.index});
Double memory borrowerIndex = Double({mantissa: pieBorrowerIndex[pToken][borrower]});
pieBorrowerIndex[pToken][borrower] = borrowIndex.mantissa;
if (borrowerIndex.mantissa > 0) {
Double memory deltaIndex = sub_(borrowIndex, borrowerIndex);
uint borrowerAmount = div_(PTokenInterface(pToken).borrowBalanceStored(borrower), marketBorrowIndex);
uint borrowerDelta = mul_(borrowerAmount, deltaIndex);
uint borrowerAccrued = add_(pieAccrued[borrower], borrowerDelta);
pieAccrued[borrower] = transferPie(borrower, borrowerAccrued, distributeAll ? 0 : pieClaimThreshold);
emit DistributedBorrowerPie(pToken, borrower, borrowerDelta, borrowIndex.mantissa);
}
}
/**
* @notice Transfer PIE to the user, if they are above the threshold
* @dev Note: If there is not enough PIE, we do not perform the transfer all.
* @param user The address of the user to transfer PIE to
* @param userAccrued The amount of PIE to (possibly) transfer
* @return The amount of PIE which was NOT transferred to the user
*/
function transferPie(address user, uint userAccrued, uint threshold) internal returns (uint) {
if (userAccrued >= threshold && userAccrued > 0) {
address pie = getPieAddress();
uint pieRemaining = EIP20Interface(pie).balanceOf(address(this));
if (userAccrued <= pieRemaining) {
EIP20Interface(pie).transfer(user, userAccrued);
return 0;
}
}
return userAccrued;
}
/**
* @notice Claim all the pie accrued by holder in all markets
* @param holder The address to claim PIE for
*/
function claimPie(address holder) public {
claimPie(holder, allMarkets);
}
/**
* @notice Claim all the pie accrued by holder in the specified markets
* @param holder The address to claim PIE for
* @param pTokens The list of markets to claim PIE in
*/
function claimPie(address holder, address[] memory pTokens) public {
address[] memory holders = new address[](1);
holders[0] = holder;
claimPie(holders, pTokens, true, true);
}
/**
* @notice Claim all pie accrued by the holders
* @param holders The addresses to claim PIE for
* @param pTokens The list of markets to claim PIE in
* @param borrowers Whether or not to claim PIE earned by borrowing
* @param suppliers Whether or not to claim PIE earned by supplying
*/
function claimPie(address[] memory holders, address[] memory pTokens, bool borrowers, bool suppliers) public {
for (uint i = 0; i < pTokens.length; i++) {
address pToken = pTokens[i];
require(markets[pToken].isListed, "market must be listed");
if (borrowers == true) {
Exp memory borrowIndex = Exp({mantissa: PTokenInterface(pToken).borrowIndex()});
updatePieBorrowIndex(pToken, borrowIndex);
for (uint j = 0; j < holders.length; j++) {
distributeBorrowerPie(pToken, holders[j], borrowIndex, true);
}
}
if (suppliers == true) {
updatePieSupplyIndex(pToken);
for (uint j = 0; j < holders.length; j++) {
distributeSupplierPie(pToken, holders[j], true);
}
}
}
}
/*** Pie Distribution Admin ***/
/**
* @notice Set the amount of PIE distributed per block
* @param pieRate_ The amount of PIE wei per block to distribute
*/
function _setPieRate(uint pieRate_) public {
require(msg.sender == admin, "only admin can change pie rate");
uint oldRate = pieRate;
pieRate = pieRate_;
emit NewPieRate(oldRate, pieRate_);
refreshPieSpeedsInternal();
}
function _addPieMarkets(address[] memory pTokens) public {
require(msg.sender == admin, "only admin can add pie market");
for (uint i = 0; i < pTokens.length; i++) {
_addPieMarketInternal(pTokens[i]);
}
refreshPieSpeedsInternal();
}
function _addPieMarketInternal(address pToken) internal {
Market storage market = markets[pToken];
require(market.isListed == true, "pie market is not listed");
require(market.isPied == false, "pie market already added");
market.isPied = true;
emit MarketPied(pToken, true);
if (pieSupplyState[pToken].index == 0) {
pieSupplyState[pToken] = PieMarketState({
index: pieInitialIndex,
block: safe32(getBlockNumber(), "block number exceeds 32 bits")
});
} else {
pieSupplyState[pToken].block = safe32(getBlockNumber(), "block number exceeds 32 bits");
}
if (pieBorrowState[pToken].index == 0) {
pieBorrowState[pToken] = PieMarketState({
index: pieInitialIndex,
block: safe32(getBlockNumber(), "block number exceeds 32 bits")
});
} else {
pieBorrowState[pToken].block = safe32(getBlockNumber(), "block number exceeds 32 bits");
}
}
/**
* @notice Remove a market from pieMarkets, preventing it from earning PIE in the flywheel
* @param pToken The address of the market to drop
*/
function _dropPieMarket(address pToken) public {
require(msg.sender == admin, "only admin can drop pie market");
Market storage market = markets[pToken];
require(market.isPied == true, "market is not a pie market");
market.isPied = false;
emit MarketPied(pToken, false);
refreshPieSpeedsInternal();
}
/**
* @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 (address[] memory) {
return allMarkets;
}
function getBlockNumber() public view virtual returns (uint) {
return block.number;
}
/**
* @notice Return the address of the PIE token
* @return The address of PIE
*/
function getPieAddress() public view virtual returns (address) {
return pieAddress;
}
function getOracle() public view override returns (PriceOracle) {
return oracle;
}
}pragma solidity ^0.7.4;
import "./PriceOracle.sol";
abstract contract ControllerInterface {
/// @notice Indicator that this is a Controller contract (for inspection)
bool public constant isController = true;
/*** Assets You Are In ***/
function enterMarkets(address[] calldata pTokens) external virtual returns (uint[] memory);
function exitMarket(address pToken) external virtual returns (uint);
/*** Policy Hooks ***/
function mintAllowed(address pToken, address minter, uint mintAmount) external virtual returns (uint);
function redeemAllowed(address pToken, address redeemer, uint redeemTokens) external virtual returns (uint);
function redeemVerify(address pToken, address redeemer, uint redeemAmount, uint redeemTokens) external virtual;
function borrowAllowed(address pToken, address borrower, uint borrowAmount) external virtual returns (uint);
function repayBorrowAllowed(
address pToken,
address payer,
address borrower,
uint repayAmount) external virtual returns (uint);
function liquidateBorrowAllowed(
address pTokenBorrowed,
address pTokenCollateral,
address liquidator,
address borrower,
uint repayAmount) external virtual returns (uint);
function seizeAllowed(
address pTokenCollateral,
address pTokenBorrowed,
address liquidator,
address borrower,
uint seizeTokens) external virtual returns (uint);
function transferAllowed(address pToken, address src, address dst, uint transferTokens) external virtual returns (uint);
/*** Liquidity/Liquidation Calculations ***/
function liquidateCalculateSeizeTokens(
address pTokenBorrowed,
address pTokenCollateral,
uint repayAmount) external view virtual returns (uint, uint);
function getOracle() external view virtual returns (PriceOracle);
}pragma solidity ^0.7.4;
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 controllerImplementation;
/**
* @notice Pending brains of Unitroller
*/
address public pendingControllerImplementation;
}
contract ControllerStorage is UnitrollerAdminStorage {
/**
* @notice Oracle which gives the price of any given asset
*/
PriceOracle public oracle;
/**
* @notice Multiplier used to calculate the maximum repayAmount when liquidating a borrow
*/
uint public closeFactorMantissa;
/**
* @notice Multiplier representing the discount on collateral that a liquidator receives
*/
uint public liquidationIncentiveMantissa;
/**
* @notice Max number of assets a single account can participate in (borrow or use as collateral)
*/
uint public maxAssets;
/**
* @notice Per-account mapping of "assets you are in", capped by maxAssets
*/
mapping(address => address[]) public accountAssets;
/// @notice isListed Whether or not this market is listed
/**
* @notice collateralFactorMantissa 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.
*/
/// @notice accountMembership Per-market mapping of "accounts in this asset"
/// @notice isPied Whether or not this market receives PIE
struct Market {
bool isListed;
uint collateralFactorMantissa;
mapping(address => bool) accountMembership;
bool isPied;
}
/**
* @notice Official mapping of pTokens -> Market metadata
* @dev Used e.g. to determine if a market is supported
*/
mapping(address => Market) public markets;
/**
* @notice The Pause Guardian can pause certain actions as a safety mechanism.
* Actions which allow users to remove their own assets cannot be paused.
* Liquidation / seizing / transfer can only be paused globally, not by market.
*/
address public pauseGuardian;
bool public _mintGuardianPaused;
bool public _borrowGuardianPaused;
bool public transferGuardianPaused;
bool public seizeGuardianPaused;
mapping(address => bool) public mintGuardianPaused;
mapping(address => bool) public borrowGuardianPaused;
/// @notice index The market's last updated pieBorrowIndex or pieSupplyIndex
/// @notice block The block number the index was last updated at
struct PieMarketState {
uint224 index;
uint32 block;
}
/// @notice A list of all markets
address[] public allMarkets;
/// @notice The rate at which the flywheel distributes PIE, per block
uint public pieRate;
/// @notice Address of the PIE token
address public pieAddress;
// @notice Address of the factory
address public factory;
/// @notice The portion of pieRate that each market currently receives
mapping(address => uint) public pieSpeeds;
/// @notice The PIE market supply state for each market
mapping(address => PieMarketState) public pieSupplyState;
/// @notice The PIE market borrow state for each market
mapping(address => PieMarketState) public pieBorrowState;
/// @notice The PIE borrow index for each market for each supplier as of the last time they accrued PIE
mapping(address => mapping(address => uint)) public pieSupplierIndex;
/// @notice The PIE borrow index for each market for each borrower as of the last time they accrued PIE
mapping(address => mapping(address => uint)) public pieBorrowerIndex;
/// @notice The PIE accrued but not yet transferred to each user
mapping(address => uint) public pieAccrued;
}pragma solidity ^0.7.4;
/**
* @title ERC 20 Token Standard Interface
* https://eips.ethereum.org/EIPS/eip-20
*/
interface EIP20Interface {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
/**
* @notice Get the total number of tokens in circulation
* @return The supply of tokens
*/
function totalSupply() external view returns (uint256);
/**
* @notice Gets the balance of the specified address
* @param owner The address from which the balance will be retrieved
* @return The balance
*/
function balanceOf(address owner) external view returns (uint256);
/**
* @notice Transfer `amount` tokens from `msg.sender` to `dst`
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transfer(address dst, uint256 amount) external returns (bool);
/**
* @notice Transfer `amount` tokens from `src` to `dst`
* @param src The address of the source account
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transferFrom(address src, address dst, uint256 amount) external returns (bool);
/**
* @notice Approve `spender` to transfer up to `amount` from `src`
* @dev This will overwrite the approval amount for `spender`
* and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
* @param spender The address of the account which may transfer tokens
* @param amount The number of tokens that are approved (-1 means infinite)
* @return Whether or not the approval succeeded
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @notice Get the current allowance from `owner` for `spender`
* @param owner The address of the account which owns the tokens to be spent
* @param spender The address of the account which may transfer tokens
* @return The number of tokens allowed to be spent (-1 means infinite)
*/
function allowance(address owner, address spender) external view returns (uint256);
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
}pragma solidity ^0.7.4;
/**
* @title EIP20NonStandardInterface
* @dev Version of ERC20 with no return values for `transfer` and `transferFrom`
* See https://medium.com/coinmonks/missing-return-value-bug-at-least-130-tokens-affected-d67bf08521ca
*/
interface EIP20NonStandardInterface {
/**
* @notice Get the total number of tokens in circulation
* @return The supply of tokens
*/
function totalSupply() external view returns (uint256);
/**
* @notice Gets the balance of the specified address
* @param owner The address from which the balance will be retrieved
* @return The balance
*/
function balanceOf(address owner) external view returns (uint256);
///
/// !!!!!!!!!!!!!!
/// !!! NOTICE !!! `transfer` does not return a value, in violation of the ERC-20 specification
/// !!!!!!!!!!!!!!
///
/**
* @notice Transfer `amount` tokens from `msg.sender` to `dst`
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
*/
function transfer(address dst, uint256 amount) external;
///
/// !!!!!!!!!!!!!!
/// !!! NOTICE !!! `transferFrom` does not return a value, in violation of the ERC-20 specification
/// !!!!!!!!!!!!!!
///
/**
* @notice Transfer `amount` tokens from `src` to `dst`
* @param src The address of the source account
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
*/
function transferFrom(address src, address dst, uint256 amount) external;
/**
* @notice Approve `spender` to transfer up to `amount` from `src`
* @dev This will overwrite the approval amount for `spender`
* and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
* @param spender The address of the account which may transfer tokens
* @param amount The number of tokens that are approved
* @return Whether or not the approval succeeded
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @notice Get the current allowance from `owner` for `spender`
* @param owner The address of the account which owns the tokens to be spent
* @param spender The address of the account which may transfer tokens
* @return The number of tokens allowed to be spent
*/
function allowance(address owner, address spender) external view returns (uint256);
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
}pragma solidity ^0.7.4;
contract ControllerErrorReporter {
enum Error {
NO_ERROR,
UNAUTHORIZED,
CONTROLLER_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,
PRICE_UPDATE_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_PAUSE_GUARDIAN_OWNER_CHECK,
SET_PENDING_ADMIN_OWNER_CHECK,
SET_PENDING_IMPLEMENTATION_OWNER_CHECK,
SET_PRICE_ORACLE_OWNER_CHECK,
SUPPORT_MARKET_EXISTS,
SUPPORT_MARKET_OWNER_CHECK
}
/**
* @dev `error` corresponds to enum Error; `info` corresponds to enum FailureInfo, and `detail` is an arbitrary
* contract-specific code that enables us to report opaque error codes from upgradeable contracts.
**/
event Failure(uint error, uint info, uint detail);
/**
* @dev use this when reporting a known error from the money market or a non-upgradeable collaborator
*/
function fail(Error err, FailureInfo info) internal returns (uint) {
emit Failure(uint(err), uint(info), 0);
return uint(err);
}
/**
* @dev use this when reporting an opaque error from an upgradeable collaborator contract
*/
function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) {
emit Failure(uint(err), uint(info), opaqueError);
return uint(err);
}
}
contract TokenErrorReporter {
enum Error {
NO_ERROR,
UNAUTHORIZED,
BAD_INPUT,
CONTROLLER_REJECTION,
CONTROLLER_CALCULATION_ERROR,
INTEREST_RATE_MODEL_ERROR,
INVALID_ACCOUNT_PAIR,
INVALID_CLOSE_AMOUNT_REQUESTED,
INVALID_COLLATERAL_FACTOR,
MATH_ERROR,
MARKET_NOT_FRESH,
MARKET_NOT_LISTED,
TOKEN_INSUFFICIENT_ALLOWANCE,
TOKEN_INSUFFICIENT_BALANCE,
TOKEN_INSUFFICIENT_CASH,
TOKEN_TRANSFER_IN_FAILED,
TOKEN_TRANSFER_OUT_FAILED
}
/*
* Note: FailureInfo (but not Error) is kept in alphabetical order
* This is because FailureInfo grows significantly faster, and
* the order of Error has some meaning, while the order of FailureInfo
* is entirely arbitrary.
*/
enum FailureInfo {
ACCEPT_ADMIN_PENDING_ADMIN_CHECK,
ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED,
ACCRUE_INTEREST_BORROW_RATE_CALCULATION_FAILED,
ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED,
ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED,
ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED,
ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED,
BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,
BORROW_ACCRUE_INTEREST_FAILED,
BORROW_CASH_NOT_AVAILABLE,
BORROW_FRESHNESS_CHECK,
BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED,
BORROW_MARKET_NOT_LISTED,
BORROW_CONTROLLER_REJECTION,
LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED,
LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED,
LIQUIDATE_COLLATERAL_FRESHNESS_CHECK,
LIQUIDATE_CONTROLLER_REJECTION,
LIQUIDATE_CONTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED,
LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX,
LIQUIDATE_CLOSE_AMOUNT_IS_ZERO,
LIQUIDATE_FRESHNESS_CHECK,
LIQUIDATE_LIQUIDATOR_IS_BORROWER,
LIQUIDATE_REPAY_BORROW_FRESH_FAILED,
LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED,
LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED,
LIQUIDATE_SEIZE_CONTROLLER_REJECTION,
LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER,
LIQUIDATE_SEIZE_TOO_MUCH,
MINT_ACCRUE_INTEREST_FAILED,
MINT_CONTROLLER_REJECTION,
MINT_EXCHANGE_CALCULATION_FAILED,
MINT_EXCHANGE_RATE_READ_FAILED,
MINT_FRESHNESS_CHECK,
MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED,
MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,
MINT_TRANSFER_IN_FAILED,
MINT_TRANSFER_IN_NOT_POSSIBLE,
REDEEM_ACCRUE_INTEREST_FAILED,
REDEEM_CONTROLLER_REJECTION,
REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED,
REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED,
REDEEM_EXCHANGE_RATE_READ_FAILED,
REDEEM_FRESHNESS_CHECK,
REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED,
REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,
REDEEM_TRANSFER_OUT_NOT_POSSIBLE,
REDUCE_RESERVES_ACCRUE_INTEREST_FAILED,
REDUCE_RESERVES_ADMIN_CHECK,
REDUCE_RESERVES_CASH_NOT_AVAILABLE,
REDUCE_RESERVES_FRESH_CHECK,
REDUCE_RESERVES_VALIDATION,
REPAY_BEHALF_ACCRUE_INTEREST_FAILED,
REPAY_BORROW_ACCRUE_INTEREST_FAILED,
REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_CONTROLLER_REJECTION,
REPAY_BORROW_FRESHNESS_CHECK,
REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE,
SET_COLLATERAL_FACTOR_OWNER_CHECK,
SET_COLLATERAL_FACTOR_VALIDATION,
SET_CONTROLLER_OWNER_CHECK,
SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED,
SET_INTEREST_RATE_MODEL_FRESH_CHECK,
SET_INTEREST_RATE_MODEL_OWNER_CHECK,
SET_MAX_ASSETS_OWNER_CHECK,
SET_ORACLE_MARKET_NOT_LISTED,
SET_PENDING_ADMIN_OWNER_CHECK,
SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED,
SET_RESERVE_FACTOR_ADMIN_CHECK,
SET_RESERVE_FACTOR_FRESH_CHECK,
SET_RESERVE_FACTOR_BOUNDS_CHECK,
TRANSFER_CONTROLLER_REJECTION,
TRANSFER_NOT_ALLOWED,
TRANSFER_NOT_ENOUGH,
TRANSFER_TOO_MUCH,
ADD_RESERVES_ACCRUE_INTEREST_FAILED,
ADD_RESERVES_FRESH_CHECK,
ADD_RESERVES_TRANSFER_IN_NOT_POSSIBLE,
SET_NEW_IMPLEMENTATION
}
/**
* @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 OracleErrorReporter {
enum Error {
NO_ERROR,
UNAUTHORIZED,
UPDATE_PRICE
}
enum FailureInfo {
ACCEPT_ADMIN_PENDING_ADMIN_CHECK,
NO_RESERVES,
PERIOD_NOT_ELAPSED,
SET_NEW_ADDRESSES,
SET_NEW_IMPLEMENTATION,
SET_PENDING_ADMIN_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);
}
}
contract FactoryErrorReporter {
enum Error {
NO_ERROR,
INVALID_POOL,
MARKET_NOT_LISTED,
UNAUTHORIZED
}
enum FailureInfo {
ACCEPT_ADMIN_PENDING_ADMIN_CHECK,
CREATE_PETH_POOL,
CREATE_PPIE_POOL,
DEFICIENCY_ETH_LIQUIDITY_IN_POOL,
PAIR_IS_NOT_EXIST,
SET_MIN_LIQUIDITY_OWNER_CHECK,
SET_NEW_CONTROLLER,
SET_NEW_DECIMALS,
SET_NEW_EXCHANGE_RATE,
SET_NEW_IMPLEMENTATION,
SET_NEW_INTEREST_RATE_MODEL,
SET_NEW_ORACLE,
SET_NEW_RESERVE_FACTOR,
SET_PENDING_ADMIN_OWNER_CHECK,
SUPPORT_MARKET_BAD_RESULT
}
/**
* @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);
}
}
contract RegistryErrorReporter {
enum Error {
NO_ERROR,
UNAUTHORIZED
}
enum FailureInfo {
ACCEPT_ADMIN_PENDING_ADMIN_CHECK,
SET_NEW_IMPLEMENTATION,
SET_PENDING_ADMIN_OWNER_CHECK,
SET_NEW_FACTORY
}
/**
* @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);
}
}pragma solidity ^0.7.4;
import "./CarefulMath.sol";
/**
* @title Exponential module for storing fixed-precision decimals
* @author DeFiPie
* @notice Exp is a struct which stores decimals with a fixed precision of 18 decimal places.
* Thus, if we wanted to store the 5.1, mantissa would store 5.1e18. That is:
* `Exp({mantissa: 5100000000000000000})`.
*/
contract Exponential is CarefulMath {
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 Creates an exponential from numerator and denominator values.
* Note: Returns an error if (`num` * 10e18) > MAX_INT,
* or if `denom` is zero.
*/
function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) {
(MathError err0, uint scaledNumerator) = mulUInt(num, expScale);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
(MathError err1, uint rational) = divUInt(scaledNumerator, denom);
if (err1 != MathError.NO_ERROR) {
return (err1, Exp({mantissa: 0}));
}
return (MathError.NO_ERROR, Exp({mantissa: rational}));
}
/**
* @dev Adds two exponentials, returning a new exponential.
*/
function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) {
(MathError error, uint result) = addUInt(a.mantissa, b.mantissa);
return (error, Exp({mantissa: result}));
}
/**
* @dev Subtracts two exponentials, returning a new exponential.
*/
function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) {
(MathError error, uint result) = subUInt(a.mantissa, b.mantissa);
return (error, Exp({mantissa: result}));
}
/**
* @dev Multiply an Exp by a scalar, returning a new Exp.
*/
function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) {
(MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa}));
}
/**
* @dev Multiply an Exp by a scalar, then truncate to return an unsigned integer.
*/
function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) {
(MathError err, Exp memory product) = mulScalar(a, scalar);
if (err != MathError.NO_ERROR) {
return (err, 0);
}
return (MathError.NO_ERROR, truncate(product));
}
/**
* @dev Multiply an Exp by a scalar, truncate, then add an to an unsigned integer, returning an unsigned integer.
*/
function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) {
(MathError err, Exp memory product) = mulScalar(a, scalar);
if (err != MathError.NO_ERROR) {
return (err, 0);
}
return addUInt(truncate(product), addend);
}
/**
* @dev Divide an Exp by a scalar, returning a new Exp.
*/
function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) {
(MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa}));
}
/**
* @dev Divide a scalar by an Exp, returning a new Exp.
*/
function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) {
/*
We are doing this as:
getExp(mulUInt(expScale, scalar), divisor.mantissa)
How it works:
Exp = a / b;
Scalar = s;
`s / (a / b)` = `b * s / a` and since for an Exp `a = mantissa, b = expScale`
*/
(MathError err0, uint numerator) = mulUInt(expScale, scalar);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return getExp(numerator, divisor.mantissa);
}
/**
* @dev Divide a scalar by an Exp, then truncate to return an unsigned integer.
*/
function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) {
(MathError err, Exp memory fraction_) = divScalarByExp(scalar, divisor);
if (err != MathError.NO_ERROR) {
return (err, 0);
}
return (MathError.NO_ERROR, truncate(fraction_));
}
/**
* @dev Multiplies two exponentials, returning a new exponential.
*/
function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) {
(MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
// We add half the scale before dividing so that we get rounding instead of truncation.
// See "Listing 6" and text above it at https://accu.org/index.php/journals/1717
// Without this change, a result like 6.6...e-19 will be truncated to 0 instead of being rounded to 1e-18.
(MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct);
if (err1 != MathError.NO_ERROR) {
return (err1, Exp({mantissa: 0}));
}
(MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale);
// The only error `div` can return is MathError.DIVISION_BY_ZERO but we control `expScale` and it is not zero.
assert(err2 == MathError.NO_ERROR);
return (MathError.NO_ERROR, Exp({mantissa: product}));
}
/**
* @dev Multiplies two exponentials given their mantissas, returning a new exponential.
*/
function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) {
return mulExp(Exp({mantissa: a}), Exp({mantissa: b}));
}
/**
* @dev Multiplies three exponentials, returning a new exponential.
*/
function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) {
(MathError err, Exp memory ab) = mulExp(a, b);
if (err != MathError.NO_ERROR) {
return (err, ab);
}
return mulExp(ab, c);
}
/**
* @dev Divides two exponentials, returning a new exponential.
* (a/scale) / (b/scale) = (a/scale) * (scale/b) = a/b,
* which we can scale as an Exp by calling getExp(a.mantissa, b.mantissa)
*/
function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) {
return getExp(a.mantissa, b.mantissa);
}
/**
* @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 Checks if first Exp is less than second Exp.
*/
function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) {
return left.mantissa < right.mantissa;
}
/**
* @dev Checks if left Exp <= right Exp.
*/
function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) {
return left.mantissa <= right.mantissa;
}
/**
* @dev Checks if left Exp > right Exp.
*/
function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) {
return left.mantissa > right.mantissa;
}
/**
* @dev returns true if Exp is exactly zero
*/
function isZeroExp(Exp memory value) pure internal returns (bool) {
return value.mantissa == 0;
}
function safe224(uint n, string memory errorMessage) pure internal returns (uint224) {
require(n < 2**224, errorMessage);
return uint224(n);
}
function safe32(uint n, string memory errorMessage) pure internal returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) {
return Exp({mantissa: add_(a.mantissa, b.mantissa)});
}
function add_(Double memory a, Double memory b) pure internal returns (Double memory) {
return Double({mantissa: add_(a.mantissa, b.mantissa)});
}
function add_(uint a, uint b) pure internal returns (uint) {
return add_(a, b, "addition overflow");
}
function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) {
uint c = a + b;
require(c >= a, errorMessage);
return c;
}
function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) {
return Exp({mantissa: sub_(a.mantissa, b.mantissa)});
}
function sub_(Double memory a, Double memory b) pure internal returns (Double memory) {
return Double({mantissa: sub_(a.mantissa, b.mantissa)});
}
function sub_(uint a, uint b) pure internal returns (uint) {
return sub_(a, b, "subtraction underflow");
}
function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) {
require(b <= a, errorMessage);
return a - b;
}
function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) {
return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale});
}
function mul_(Exp memory a, uint b) pure internal returns (Exp memory) {
return Exp({mantissa: mul_(a.mantissa, b)});
}
function mul_(uint a, Exp memory b) pure internal returns (uint) {
return mul_(a, b.mantissa) / expScale;
}
function mul_(Double memory a, Double memory b) pure internal returns (Double memory) {
return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale});
}
function mul_(Double memory a, uint b) pure internal returns (Double memory) {
return Double({mantissa: mul_(a.mantissa, b)});
}
function mul_(uint a, Double memory b) pure internal returns (uint) {
return mul_(a, b.mantissa) / doubleScale;
}
function mul_(uint a, uint b) pure internal returns (uint) {
return mul_(a, b, "multiplication overflow");
}
function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) {
if (a == 0 || b == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, errorMessage);
return c;
}
function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) {
return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)});
}
function div_(Exp memory a, uint b) pure internal returns (Exp memory) {
return Exp({mantissa: div_(a.mantissa, b)});
}
function div_(uint a, Exp memory b) pure internal returns (uint) {
return div_(mul_(a, expScale), b.mantissa);
}
function div_(Double memory a, Double memory b) pure internal returns (Double memory) {
return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)});
}
function div_(Double memory a, uint b) pure internal returns (Double memory) {
return Double({mantissa: div_(a.mantissa, b)});
}
function div_(uint a, Double memory b) pure internal returns (uint) {
return div_(mul_(a, doubleScale), b.mantissa);
}
function div_(uint a, uint b) pure internal returns (uint) {
return div_(a, b, "divide by zero");
}
function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) {
require(b > 0, errorMessage);
return a / b;
}
function fraction(uint a, uint b) pure internal returns (Double memory) {
return Double({mantissa: div_(mul_(a, doubleScale), b)});
}
}pragma solidity ^0.7.4;
/**
* @title DeFiPie's InterestRateModel Interface
* @author DeFiPie
*/
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) external view virtual 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) external view virtual returns (uint);
}pragma solidity ^0.7.4;
pragma experimental ABIEncoderV2;
import "../Exponential.sol";
import "../Controller.sol";
import "../PToken.sol";
contract ClaimCalc is Exponential {
Controller public controller;
constructor(address _controller) {
controller = Controller(_controller);
}
function allMarkets() public view returns (address[] memory) {
return controller.getAllMarkets();
}
function getBlockNumber() public view returns (uint) {
return controller.getBlockNumber() + 1;
}
function updatePieBorrowIndex(address pToken, Exp memory marketBorrowIndex) public view returns (Double memory) {
(uint224 index, uint32 block) = controller.pieBorrowState(pToken);
Double memory newBorrowindex = Double({mantissa: index});
uint borrowSpeed = controller.pieSpeeds(pToken);
uint blockNumber = getBlockNumber();
uint deltaBlocks = sub_(blockNumber, uint(block));
if (deltaBlocks > 0 && borrowSpeed > 0) {
uint borrowAmount = div_(PTokenInterface(pToken).totalBorrows(), marketBorrowIndex);
uint pieAccrued = mul_(deltaBlocks, borrowSpeed);
Double memory ratio = borrowAmount > 0 ? fraction(pieAccrued, borrowAmount) : Double({mantissa: 0});
newBorrowindex = add_(Double({mantissa: index}), ratio);
}
return newBorrowindex;
}
function updatePieSupplyIndex(address pToken) public view returns (Double memory) {
(uint224 index, uint32 block) = controller.pieSupplyState(pToken);
Double memory newSupplyIndex = Double({mantissa: index});
uint supplySpeed = controller.pieSpeeds(pToken);
uint blockNumber = getBlockNumber();
uint deltaBlocks = sub_(blockNumber, uint(block));
if (deltaBlocks > 0 && supplySpeed > 0) {
uint supplyTokens = PTokenInterface(pToken).totalSupply();
uint pieAccrued = mul_(deltaBlocks, supplySpeed);
Double memory ratio = supplyTokens > 0 ? fraction(pieAccrued, supplyTokens) : Double({mantissa: 0});
newSupplyIndex = add_(Double({mantissa: index}), ratio);
}
return newSupplyIndex;
}
function calcClaimPie(address holder) public view returns (uint) {
return calcClaimPie(holder, controller.getAllMarkets());
}
function calcClaimPie(address holder, address[] memory pTokens) public view returns (uint) {
uint claimAmount = calcClaimPieWithoutAccrued(holder, pTokens);
uint accrued = controller.pieAccrued(holder);
return claimAmount + accrued;
}
function calcClaimPieWithoutAccrued(address holder, address[] memory pTokens) public view returns (uint) {
uint amount;
for (uint i = 0; i < pTokens.length; i++) {
address pToken = pTokens[i];
Exp memory marketBorrowIndex = Exp({mantissa: PTokenInterface(pToken).borrowIndex()});
Double memory borrowIndex = updatePieBorrowIndex(pToken, marketBorrowIndex);
Double memory borrowerIndex = Double({mantissa: controller.pieBorrowerIndex(pToken, holder)});
if (borrowerIndex.mantissa > 0) {
Double memory deltaIndex = sub_(borrowIndex, borrowerIndex);
uint borrowerAmount = div_(PTokenInterface(pToken).borrowBalanceStored(holder), marketBorrowIndex);
uint borrowerDelta = mul_(borrowerAmount, deltaIndex);
amount = add_(amount, borrowerDelta);
}
Double memory supplyIndex = updatePieSupplyIndex(pToken);
Double memory supplierIndex = Double({mantissa: controller.pieSupplierIndex(pToken, holder)});
if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) {
supplierIndex.mantissa = controller.pieInitialIndex();
}
Double memory deltaIndex = sub_(supplyIndex, supplierIndex);
uint supplierTokens = PTokenInterface(pToken).balanceOf(holder);
uint supplierDelta = mul_(supplierTokens, deltaIndex);
amount = add_(amount, supplierDelta);
}
return amount;
}
function checkClaimPieMarkets(address holder) public view returns (address[] memory) {
return checkClaimPieMarkets(holder, controller.getAllMarkets());
}
function checkClaimPieMarkets(address holder, address[] memory pTokens) public view returns (address[] memory) {
address[] memory markets = new address[](pTokens.length);
uint count;
for (uint i = 0; i < pTokens.length; i++) {
uint delta;
Exp memory marketBorrowIndex = Exp({mantissa: PTokenInterface(pTokens[i]).borrowIndex()});
Double memory index = updatePieBorrowIndex(pTokens[i], marketBorrowIndex);
Double memory borrowerIndex = Double({mantissa: controller.pieBorrowerIndex(pTokens[i], holder)});
if (borrowerIndex.mantissa > 0) {
uint borrowerAmount = div_(PTokenInterface(pTokens[i]).borrowBalanceStored(holder), marketBorrowIndex);
delta = mul_(borrowerAmount, sub_(index, borrowerIndex));
}
index = updatePieSupplyIndex(pTokens[i]);
Double memory supplierIndex = Double({mantissa: controller.pieSupplierIndex(pTokens[i], holder)});
if (supplierIndex.mantissa == 0 && index.mantissa > 0) {
supplierIndex.mantissa = controller.pieInitialIndex();
}
uint supplierTokens = PTokenInterface(pTokens[i]).balanceOf(holder);
delta = delta + mul_(supplierTokens, sub_(index, supplierIndex));
if (delta > 0) {
markets[count] = pTokens[i];
count++;
}
}
address[] memory claimPieMarkets = new address[](count);
for(uint i = 0; i < count; i++) {
claimPieMarkets[i] = markets[i];
}
return claimPieMarkets;
}
}pragma solidity ^0.7.4;
import "./ControllerInterface.sol";
import "./PTokenInterfaces.sol";
import "./ErrorReporter.sol";
import "./Exponential.sol";
import "./EIP20Interface.sol";
import "./EIP20NonStandardInterface.sol";
import "./InterestRateModel.sol";
import "./RegistryInterface.sol";
import "./PriceOracle.sol";
/**
* @title DeFiPie's PToken Contract
* @notice Abstract base for PTokens
* @author DeFiPie
*/
abstract contract PToken is PTokenInterface, Exponential, TokenErrorReporter {
/**
* @notice Initialize the money market
* @param registry_ The address of the Registry
* @param controller_ The address of the Controller
* @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(
RegistryInterface registry_,
ControllerInterface controller_,
InterestRateModel interestRateModel_,
uint initialExchangeRateMantissa_,
uint initialReserveFactorMantissa_,
string memory name_,
string memory symbol_,
uint8 decimals_
)
public virtual
{
require(accrualBlockNumber == 0 && borrowIndex == 0, "market may only be initialized once");
registry = address(registry_);
// Set initial exchange rate
initialExchangeRateMantissa = initialExchangeRateMantissa_;
require(initialExchangeRateMantissa > 0, "initial exchange rate must be greater than zero.");
reserveFactorMantissa = initialReserveFactorMantissa_;
// Set the controller
uint err = _setControllerInternal(controller_);
require(err == uint(Error.NO_ERROR), "setting controller failed");
// Initialize block number and borrow index (block number mocks depend on controller being set)
accrualBlockNumber = getBlockNumber();
borrowIndex = mantissaOne;
// Set the interest rate model (depends on block number / borrow index)
err = _setInterestRateModelFreshInternal(interestRateModel_);
require(err == uint(Error.NO_ERROR), "setting interest rate model failed");
name = name_;
symbol = symbol_;
decimals = decimals_;
// The counter starts true to prevent changing it from zero to non-zero (i.e. smaller cost/refund)
_notEntered = true;
}
/**
* @notice Transfer `tokens` tokens from `src` to `dst` by `spender`
* @dev Called by both `transfer` and `transferFrom` internally
* @param spender The address of the account performing the transfer
* @param src The address of the source account
* @param dst The address of the destination account
* @param tokens The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transferTokens(address spender, address src, address dst, uint tokens) internal returns (uint) {
/* Fail if transfer not allowed */
uint allowed = controller.transferAllowed(address(this), src, dst, tokens);
if (allowed != 0) {
return failOpaque(Error.CONTROLLER_REJECTION, FailureInfo.TRANSFER_CONTROLLER_REJECTION, allowed);
}
/* Do not allow self-transfers */
if (src == dst) {
return fail(Error.BAD_INPUT, FailureInfo.TRANSFER_NOT_ALLOWED);
}
/* Get the allowance, infinite for the account owner */
uint startingAllowance = 0;
if (spender == src) {
startingAllowance = uint(-1);
} else {
startingAllowance = transferAllowances[src][spender];
}
/* Do the calculations, checking for {under,over}flow */
MathError mathErr;
uint allowanceNew;
uint srcTokensNew;
uint dstTokensNew;
(mathErr, allowanceNew) = subUInt(startingAllowance, tokens);
if (mathErr != MathError.NO_ERROR) {
return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ALLOWED);
}
(mathErr, srcTokensNew) = subUInt(accountTokens[src], tokens);
if (mathErr != MathError.NO_ERROR) {
return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ENOUGH);
}
(mathErr, dstTokensNew) = addUInt(accountTokens[dst], tokens);
if (mathErr != MathError.NO_ERROR) {
return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_TOO_MUCH);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
accountTokens[src] = srcTokensNew;
accountTokens[dst] = dstTokensNew;
/* Eat some of the allowance (if necessary) */
if (startingAllowance != uint(-1)) {
transferAllowances[src][spender] = allowanceNew;
}
/* We emit a Transfer event */
emit Transfer(src, dst, tokens);
return uint(Error.NO_ERROR);
}
/**
* @notice Transfer `amount` tokens from `msg.sender` to `dst`
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transfer(address dst, uint256 amount) external override virtual nonReentrant returns (bool) {
return transferTokens(msg.sender, msg.sender, dst, amount) == uint(Error.NO_ERROR);
}
/**
* @notice Transfer `amount` tokens from `src` to `dst`
* @param src The address of the source account
* @param dst The address of the destination account
* @param amount The number of tokens to transfer
* @return Whether or not the transfer succeeded
*/
function transferFrom(address src, address dst, uint256 amount) external override virtual nonReentrant returns (bool) {
return transferTokens(msg.sender, src, dst, amount) == uint(Error.NO_ERROR);
}
/**
* @notice Approve `spender` to transfer up to `amount` from `src`
* @dev This will overwrite the approval amount for `spender`
* and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
* @param spender The address of the account which may transfer tokens
* @param amount The number of tokens that are approved (-1 means infinite)
* @return Whether or not the approval succeeded
*/
function approve(address spender, uint256 amount) external 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 (uint) {
Exp memory exchangeRate = Exp({mantissa: exchangeRateCurrent()});
(MathError mErr, uint balance) = mulScalarTruncate(exchangeRate, accountTokens[owner]);
require(mErr == MathError.NO_ERROR, "balance could not be calculated");
return balance;
}
/**
* @notice Get a snapshot of the account's balances, and the cached exchange rate
* @dev This is used by controller 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 (uint, uint, uint, uint) {
uint pTokenBalance = accountTokens[account];
uint borrowBalance;
uint exchangeRateMantissa;
MathError mErr;
(mErr, borrowBalance) = borrowBalanceStoredInternal(account);
if (mErr != MathError.NO_ERROR) {
return (uint(Error.MATH_ERROR), 0, 0, 0);
}
(mErr, exchangeRateMantissa) = exchangeRateStoredInternal();
if (mErr != MathError.NO_ERROR) {
return (uint(Error.MATH_ERROR), 0, 0, 0);
}
return (uint(Error.NO_ERROR), pTokenBalance, borrowBalance, exchangeRateMantissa);
}
function getBorrowSnapshot(address account) external view returns(uint, uint) {
return (accountBorrows[account].principal, accountBorrows[account].interestIndex);
}
/**
* @dev Function to simply retrieve block number
* This exists mainly for inheriting test contracts to stub this result.
*/
function getBlockNumber() internal view virtual returns (uint) {
return block.number;
}
/**
* @notice Returns the current per-block borrow interest rate for this pToken
* @return The borrow interest rate per block, scaled by 1e18
*/
function borrowRatePerBlock() external view override returns (uint) {
return interestRateModel.getBorrowRate(getCashPrior(), totalBorrows, totalReserves);
}
/**
* @notice Returns the current per-block supply interest rate for this pToken
* @return The supply interest rate per block, scaled by 1e18
*/
function supplyRatePerBlock() external view override returns (uint) {
return interestRateModel.getSupplyRate(getCashPrior(), totalBorrows, totalReserves, reserveFactorMantissa);
}
/**
* @notice Returns the current total borrows plus accrued interest
* @return The total borrows with interest
*/
function totalBorrowsCurrent() external override nonReentrant returns (uint) {
require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed");
return totalBorrows;
}
/**
* @notice Accrue interest to updated borrowIndex and then calculate account's borrow balance using the updated borrowIndex
* @param account The address whose balance should be calculated after updating borrowIndex
* @return The calculated balance
*/
function borrowBalanceCurrent(address account) external override nonReentrant returns (uint) {
require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed");
return borrowBalanceStored(account);
}
/**
* @notice Return the borrow balance of account based on stored data
* @param account The address whose balance should be calculated
* @return The calculated balance
*/
function borrowBalanceStored(address account) public view override returns (uint) {
(MathError err, uint result) = borrowBalanceStoredInternal(account);
require(err == MathError.NO_ERROR, "borrowBalanceStored: borrowBalanceStoredInternal failed");
return result;
}
/**
* @notice Return the borrow balance of account based on stored data
* @param account The address whose balance should be calculated
* @return (error code, the calculated balance or 0 if error code is non-zero)
*/
function borrowBalanceStoredInternal(address account) internal view returns (MathError, uint) {
/* Note: we do not assert that the market is up to date */
MathError mathErr;
uint principalTimesIndex;
uint result;
/* Get borrowBalance and borrowIndex */
BorrowSnapshot storage borrowSnapshot = accountBorrows[account];
/* If borrowBalance = 0 then borrowIndex is likely also 0.
* Rather than failing the calculation with a division by 0, we immediately return 0 in this case.
*/
if (borrowSnapshot.principal == 0) {
return (MathError.NO_ERROR, 0);
}
/* Calculate new borrow balance using the interest index:
* recentBorrowBalance = borrower.borrowBalance * market.borrowIndex / borrower.borrowIndex
*/
(mathErr, principalTimesIndex) = mulUInt(borrowSnapshot.principal, borrowIndex);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0);
}
(mathErr, result) = divUInt(principalTimesIndex, borrowSnapshot.interestIndex);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0);
}
return (MathError.NO_ERROR, result);
}
/**
* @notice Accrue interest then return the up-to-date exchange rate
* @return Calculated exchange rate scaled by 1e18
*/
function exchangeRateCurrent() public override nonReentrant returns (uint) {
require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed");
return exchangeRateStored();
}
/**
* @notice Calculates the exchange rate from the underlying to the PToken
* @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 (uint) {
(MathError err, uint result) = exchangeRateStoredInternal();
require(err == MathError.NO_ERROR, "exchangeRateStored: exchangeRateStoredInternal failed");
return result;
}
/**
* @notice Calculates the exchange rate from the underlying to the PToken
* @dev This function does not accrue interest before calculating the exchange rate
* @return (error code, calculated exchange rate scaled by 1e18)
*/
function exchangeRateStoredInternal() internal view virtual returns (MathError, uint) {
uint _totalSupply = totalSupply;
if (_totalSupply == 0) {
/*
* If there are no tokens minted:
* exchangeRate = initialExchangeRate
*/
return (MathError.NO_ERROR, initialExchangeRateMantissa);
} else {
/*
* Otherwise:
* exchangeRate = (totalCash + totalBorrows - totalReserves) / totalSupply
*/
uint totalCash = getCashPrior();
uint cashPlusBorrowsMinusReserves;
Exp memory exchangeRate;
MathError mathErr;
(mathErr, cashPlusBorrowsMinusReserves) = addThenSubUInt(totalCash, totalBorrows, totalReserves);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0);
}
(mathErr, exchangeRate) = getExp(cashPlusBorrowsMinusReserves, _totalSupply);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0);
}
return (MathError.NO_ERROR, exchangeRate.mantissa);
}
}
/**
* @notice Get cash balance of this pToken in the underlying asset
* @return The quantity of underlying asset owned by this contract
*/
function getCash() external view override returns (uint) {
return getCashPrior();
}
/**
* @notice Applies accrued interest to total borrows and reserves
* @dev This calculates interest accrued from the last checkpointed block
* up to the current block and writes new checkpoint to storage.
*/
function accrueInterest() public override returns (uint) {
controller.getOracle().updateUnderlyingPrice(address(this));
/* Remember the initial block number */
uint currentBlockNumber = getBlockNumber();
uint accrualBlockNumberPrior = accrualBlockNumber;
/* Short-circuit accumulating 0 interest */
if (accrualBlockNumberPrior == currentBlockNumber) {
return uint(Error.NO_ERROR);
}
/* Read the previous values out of storage */
uint cashPrior = getCashPrior();
uint borrowsPrior = totalBorrows;
uint reservesPrior = totalReserves;
uint borrowIndexPrior = borrowIndex;
/* Calculate the current borrow interest rate */
uint borrowRateMantissa = interestRateModel.getBorrowRate(cashPrior, borrowsPrior, reservesPrior);
require(borrowRateMantissa <= borrowRateMaxMantissa, "borrow rate is absurdly high");
/* Calculate the number of blocks elapsed since the last accrual */
(MathError mathErr, uint blockDelta) = subUInt(currentBlockNumber, accrualBlockNumberPrior);
require(mathErr == MathError.NO_ERROR, "could not calculate block delta");
/*
* Calculate the interest accumulated into borrows and reserves and the new index:
* simpleInterestFactor = borrowRate * blockDelta
* interestAccumulated = simpleInterestFactor * totalBorrows
* totalBorrowsNew = interestAccumulated + totalBorrows
* totalReservesNew = interestAccumulated * reserveFactor + totalReserves
* borrowIndexNew = simpleInterestFactor * borrowIndex + borrowIndex
*/
Exp memory simpleInterestFactor;
uint interestAccumulated;
uint totalBorrowsNew;
uint totalReservesNew;
uint borrowIndexNew;
(mathErr, simpleInterestFactor) = mulScalar(Exp({mantissa: borrowRateMantissa}), blockDelta);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, uint(mathErr));
}
(mathErr, interestAccumulated) = mulScalarTruncate(simpleInterestFactor, borrowsPrior);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, uint(mathErr));
}
(mathErr, totalBorrowsNew) = addUInt(interestAccumulated, borrowsPrior);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, uint(mathErr));
}
(mathErr, totalReservesNew) = mulScalarTruncateAddUInt(Exp({mantissa: reserveFactorMantissa}), interestAccumulated, reservesPrior);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, uint(mathErr));
}
(mathErr, borrowIndexNew) = mulScalarTruncateAddUInt(simpleInterestFactor, borrowIndexPrior, borrowIndexPrior);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, uint(mathErr));
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/* We write the previously calculated values into storage */
accrualBlockNumber = currentBlockNumber;
borrowIndex = borrowIndexNew;
totalBorrows = totalBorrowsNew;
totalReserves = totalReservesNew;
/* We emit an AccrueInterest event */
emit AccrueInterest(cashPrior, interestAccumulated, borrowIndexNew, totalBorrowsNew, totalReservesNew);
return uint(Error.NO_ERROR);
}
/**
* @notice Sender supplies assets into the market and receives pTokens in exchange
* @dev Accrues interest whether or not the operation succeeds, unless reverted
* @param mintAmount The amount of the underlying asset to supply
* @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount.
*/
function mintInternal(uint mintAmount) internal nonReentrant returns (uint, uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed
return (fail(Error(error), FailureInfo.MINT_ACCRUE_INTEREST_FAILED), 0);
}
// mintFresh emits the actual Mint event if successful and logs on errors, so we don't need to
return mintFresh(msg.sender, mintAmount);
}
struct MintLocalVars {
Error err;
MathError mathErr;
uint exchangeRateMantissa;
uint mintTokens;
uint totalSupplyNew;
uint accountTokensNew;
uint actualMintAmount;
}
/**
* @notice User supplies assets into the market and receives pTokens in exchange
* @dev Assumes interest has already been accrued up to the current block
* @param minter The address of the account which is supplying the assets
* @param mintAmount The amount of the underlying asset to supply
* @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual mint amount.
*/
function mintFresh(address minter, uint mintAmount) internal returns (uint, uint) {
/* Fail if mint not allowed */
uint allowed = controller.mintAllowed(address(this), minter, mintAmount);
if (allowed != 0) {
return (failOpaque(Error.CONTROLLER_REJECTION, FailureInfo.MINT_CONTROLLER_REJECTION, allowed), 0);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.MINT_FRESHNESS_CHECK), 0);
}
MintLocalVars memory vars;
(vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal();
if (vars.mathErr != MathError.NO_ERROR) {
return (failOpaque(Error.MATH_ERROR, FailureInfo.MINT_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)), 0);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We call `doTransferIn` for the minter and the mintAmount.
* Note: The pToken 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 pToken holds an additional `actualMintAmount`
* of cash.
*/
vars.actualMintAmount = doTransferIn(minter, mintAmount);
/*
* We get the current exchange rate and calculate the number of pTokens to be minted:
* mintTokens = actualMintAmount / exchangeRate
*/
(vars.mathErr, vars.mintTokens) = divScalarByExpTruncate(vars.actualMintAmount, Exp({mantissa: vars.exchangeRateMantissa}));
require(vars.mathErr == MathError.NO_ERROR, "MINT_EXCHANGE_CALCULATION_FAILED");
/*
* We calculate the new total supply of pTokens and minter token balance, checking for overflow:
* totalSupplyNew = totalSupply + mintTokens
* accountTokensNew = accountTokens[minter] + mintTokens
*/
(vars.mathErr, vars.totalSupplyNew) = addUInt(totalSupply, vars.mintTokens);
require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED");
(vars.mathErr, vars.accountTokensNew) = addUInt(accountTokens[minter], vars.mintTokens);
require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED");
/* We write previously calculated values into storage */
totalSupply = vars.totalSupplyNew;
accountTokens[minter] = vars.accountTokensNew;
/* We emit a Mint event, and a Transfer event */
emit Mint(minter, vars.actualMintAmount, vars.mintTokens);
emit Transfer(address(this), minter, vars.mintTokens);
return (uint(Error.NO_ERROR), vars.actualMintAmount);
}
/**
* @notice Sender redeems PTokens in exchange for the underlying asset
* @dev Accrues interest whether or not the operation succeeds, unless reverted
* @param redeemTokens The number of pTokens to redeem into underlying
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function redeemInternal(uint redeemTokens) internal nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed
return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED);
}
// redeemFresh emits redeem-specific logs on errors, so we don't need to
return redeemFresh(msg.sender, redeemTokens, 0);
}
/**
* @notice Sender redeems pTokens 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 pTokens
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function redeemUnderlyingInternal(uint redeemAmount) internal nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted redeem failed
return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED);
}
// redeemFresh emits redeem-specific logs on errors, so we don't need to
return redeemFresh(msg.sender, 0, redeemAmount);
}
struct RedeemLocalVars {
Error err;
MathError mathErr;
uint exchangeRateMantissa;
uint redeemTokens;
uint redeemAmount;
uint totalSupplyNew;
uint accountTokensNew;
}
/**
* @notice User redeems pTokens 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 pTokens 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 pTokens (only one of redeemTokensIn or redeemAmountIn may be non-zero)
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function redeemFresh(address payable redeemer, uint redeemTokensIn, uint redeemAmountIn) internal returns (uint) {
require(redeemTokensIn == 0 || redeemAmountIn == 0, "one of redeemTokensIn or redeemAmountIn must be zero");
RedeemLocalVars memory vars;
/* exchangeRate = invoke Exchange Rate Stored() */
(vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal();
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr));
}
/* If redeemTokensIn > 0: */
if (redeemTokensIn > 0) {
/*
* We calculate the exchange rate and the amount of underlying to be redeemed:
* redeemTokens = redeemTokensIn
* redeemAmount = redeemTokensIn x exchangeRateCurrent
*/
vars.redeemTokens = redeemTokensIn;
(vars.mathErr, vars.redeemAmount) = mulScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), redeemTokensIn);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, uint(vars.mathErr));
}
} else {
/*
* We get the current exchange rate and calculate the amount to be redeemed:
* redeemTokens = redeemAmountIn / exchangeRate
* redeemAmount = redeemAmountIn
*/
(vars.mathErr, vars.redeemTokens) = divScalarByExpTruncate(redeemAmountIn, Exp({mantissa: vars.exchangeRateMantissa}));
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, uint(vars.mathErr));
}
vars.redeemAmount = redeemAmountIn;
}
/* Fail if redeem not allowed */
uint allowed = controller.redeemAllowed(address(this), redeemer, vars.redeemTokens);
if (allowed != 0) {
return failOpaque(Error.CONTROLLER_REJECTION, FailureInfo.REDEEM_CONTROLLER_REJECTION, allowed);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDEEM_FRESHNESS_CHECK);
}
/*
* We calculate the new total supply and redeemer balance, checking for underflow:
* totalSupplyNew = totalSupply - redeemTokens
* accountTokensNew = accountTokens[redeemer] - redeemTokens
*/
(vars.mathErr, vars.totalSupplyNew) = subUInt(totalSupply, vars.redeemTokens);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, uint(vars.mathErr));
}
(vars.mathErr, vars.accountTokensNew) = subUInt(accountTokens[redeemer], vars.redeemTokens);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
/* Fail gracefully if protocol has insufficient cash */
if (getCashPrior() < vars.redeemAmount) {
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDEEM_TRANSFER_OUT_NOT_POSSIBLE);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We invoke doTransferOut for the redeemer and the redeemAmount.
* Note: The pToken must handle variations between ERC-20 and ETH underlying.
* On success, the pToken has redeemAmount less of cash.
* doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred.
*/
doTransferOut(redeemer, vars.redeemAmount);
/* We write previously calculated values into storage */
totalSupply = vars.totalSupplyNew;
accountTokens[redeemer] = vars.accountTokensNew;
/* We emit a Transfer event, and a Redeem event */
emit Transfer(redeemer, address(this), vars.redeemTokens);
emit Redeem(redeemer, vars.redeemAmount, vars.redeemTokens);
/* We call the defense hook */
controller.redeemVerify(address(this), redeemer, vars.redeemAmount, vars.redeemTokens);
return uint(Error.NO_ERROR);
}
/**
* @notice Sender borrows assets from the protocol to their own address
* @param borrowAmount The amount of the underlying asset to borrow
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function borrowInternal(uint borrowAmount) internal nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed
return fail(Error(error), FailureInfo.BORROW_ACCRUE_INTEREST_FAILED);
}
// borrowFresh emits borrow-specific logs on errors, so we don't need to
return borrowFresh(msg.sender, borrowAmount);
}
struct BorrowLocalVars {
MathError mathErr;
uint accountBorrows;
uint accountBorrowsNew;
uint totalBorrowsNew;
}
/**
* @notice Users borrow assets from the protocol to their own address
* @param borrowAmount The amount of the underlying asset to borrow
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function borrowFresh(address payable borrower, uint borrowAmount) internal returns (uint) {
/* Fail if borrow not allowed */
uint allowed = controller.borrowAllowed(address(this), borrower, borrowAmount);
if (allowed != 0) {
return failOpaque(Error.CONTROLLER_REJECTION, FailureInfo.BORROW_CONTROLLER_REJECTION, allowed);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.BORROW_FRESHNESS_CHECK);
}
/* Fail gracefully if protocol has insufficient underlying cash */
if (getCashPrior() < borrowAmount) {
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_CASH_NOT_AVAILABLE);
}
BorrowLocalVars memory vars;
/*
* We calculate the new borrower and total borrow balances, failing on overflow:
* accountBorrowsNew = accountBorrows + borrowAmount
* totalBorrowsNew = totalBorrows + borrowAmount
*/
(vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
(vars.mathErr, vars.accountBorrowsNew) = addUInt(vars.accountBorrows, borrowAmount);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
(vars.mathErr, vars.totalBorrowsNew) = addUInt(totalBorrows, borrowAmount);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We invoke doTransferOut for the borrower and the borrowAmount.
* Note: The pToken must handle variations between ERC-20 and ETH underlying.
* On success, the pToken borrowAmount less of cash.
* doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred.
*/
doTransferOut(borrower, borrowAmount);
/* We write the previously calculated values into storage */
accountBorrows[borrower].principal = vars.accountBorrowsNew;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = vars.totalBorrowsNew;
/* We emit a Borrow event */
emit Borrow(borrower, borrowAmount, vars.accountBorrowsNew, vars.totalBorrowsNew);
return uint(Error.NO_ERROR);
}
/**
* @notice Sender repays their own borrow
* @param repayAmount The amount to repay
* @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount.
*/
function repayBorrowInternal(uint repayAmount) internal nonReentrant returns (uint, uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed
return (fail(Error(error), FailureInfo.REPAY_BORROW_ACCRUE_INTEREST_FAILED), 0);
}
// repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to
return repayBorrowFresh(msg.sender, msg.sender, repayAmount);
}
/**
* @notice Sender repays a borrow belonging to borrower
* @param borrower the account with the debt being payed off
* @param repayAmount The amount to repay
* @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount.
*/
function repayBorrowBehalfInternal(address borrower, uint repayAmount) internal nonReentrant returns (uint, uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted borrow failed
return (fail(Error(error), FailureInfo.REPAY_BEHALF_ACCRUE_INTEREST_FAILED), 0);
}
// repayBorrowFresh emits repay-borrow-specific logs on errors, so we don't need to
return repayBorrowFresh(msg.sender, borrower, repayAmount);
}
struct RepayBorrowLocalVars {
Error err;
MathError mathErr;
uint repayAmount;
uint borrowerIndex;
uint accountBorrows;
uint accountBorrowsNew;
uint totalBorrowsNew;
uint actualRepayAmount;
}
/**
* @notice Borrows are repaid by another user (possibly the borrower).
* @param payer the account paying off the borrow
* @param borrower the account with the debt being payed off
* @param repayAmount the amount of undelrying tokens being returned
* @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount.
*/
function repayBorrowFresh(address payer, address borrower, uint repayAmount) internal returns (uint, uint) {
/* Fail if repayBorrow not allowed */
uint allowed = controller.repayBorrowAllowed(address(this), payer, borrower, repayAmount);
if (allowed != 0) {
return (failOpaque(Error.CONTROLLER_REJECTION, FailureInfo.REPAY_BORROW_CONTROLLER_REJECTION, allowed), 0);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.REPAY_BORROW_FRESHNESS_CHECK), 0);
}
RepayBorrowLocalVars memory vars;
/* We remember the original borrowerIndex for verification purposes */
vars.borrowerIndex = accountBorrows[borrower].interestIndex;
/* We fetch the amount the borrower owes, with accumulated interest */
(vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower);
if (vars.mathErr != MathError.NO_ERROR) {
return (failOpaque(Error.MATH_ERROR, FailureInfo.REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)), 0);
}
/* If repayAmount == -1, repayAmount = accountBorrows */
if (repayAmount == uint(-1)) {
vars.repayAmount = vars.accountBorrows;
} else {
vars.repayAmount = repayAmount;
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We call doTransferIn for the payer and the repayAmount
* Note: The pToken must handle variations between ERC-20 and ETH underlying.
* On success, the pToken holds an additional repayAmount of cash.
* doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred.
* it returns the amount actually transferred, in case of a fee.
*/
vars.actualRepayAmount = doTransferIn(payer, vars.repayAmount);
/*
* We calculate the new borrower and total borrow balances, failing on underflow:
* accountBorrowsNew = accountBorrows - actualRepayAmount
* totalBorrowsNew = totalBorrows - actualRepayAmount
*/
(vars.mathErr, vars.accountBorrowsNew) = subUInt(vars.accountBorrows, vars.actualRepayAmount);
require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED");
(vars.mathErr, vars.totalBorrowsNew) = subUInt(totalBorrows, vars.actualRepayAmount);
require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED");
/* We write the previously calculated values into storage */
accountBorrows[borrower].principal = vars.accountBorrowsNew;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = vars.totalBorrowsNew;
/* We emit a RepayBorrow event */
emit RepayBorrow(payer, borrower, vars.actualRepayAmount, vars.accountBorrowsNew, vars.totalBorrowsNew);
return (uint(Error.NO_ERROR), vars.actualRepayAmount);
}
/**
* @notice The sender liquidates the borrowers collateral.
* The collateral seized is transferred to the liquidator.
* @param borrower The borrower of this pToken to be liquidated
* @param pTokenCollateral The market in which to seize collateral from the borrower
* @param repayAmount The amount of the underlying borrowed asset to repay
* @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount.
*/
function liquidateBorrowInternal(address borrower, uint repayAmount, PTokenInterface pTokenCollateral) internal nonReentrant returns (uint, uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed
return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED), 0);
}
error = pTokenCollateral.accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but we still want to log the fact that an attempted liquidation failed
return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED), 0);
}
// liquidateBorrowFresh emits borrow-specific logs on errors, so we don't need to
return liquidateBorrowFresh(msg.sender, borrower, repayAmount, pTokenCollateral);
}
/**
* @notice The liquidator liquidates the borrowers collateral.
* The collateral seized is transferred to the liquidator.
* @param borrower The borrower of this pToken to be liquidated
* @param liquidator The address repaying the borrow and seizing collateral
* @param pTokenCollateral The market in which to seize collateral from the borrower
* @param repayAmount The amount of the underlying borrowed asset to repay
* @return (uint, uint) An error code (0=success, otherwise a failure, see ErrorReporter.sol), and the actual repayment amount.
*/
function liquidateBorrowFresh(address liquidator, address borrower, uint repayAmount, PTokenInterface pTokenCollateral) internal returns (uint, uint) {
/* Fail if liquidate not allowed */
uint allowed = controller.liquidateBorrowAllowed(address(this), address(pTokenCollateral), liquidator, borrower, repayAmount);
if (allowed != 0) {
return (failOpaque(Error.CONTROLLER_REJECTION, FailureInfo.LIQUIDATE_CONTROLLER_REJECTION, allowed), 0);
}
/* Verify market's block number equals current block number */
if (accrualBlockNumber != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_FRESHNESS_CHECK), 0);
}
/* Verify pTokenCollateral market's block number equals current block number */
if (pTokenCollateral.accrualBlockNumber() != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_COLLATERAL_FRESHNESS_CHECK), 0);
}
/* Fail if borrower = liquidator */
if (borrower == liquidator) {
return (fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_LIQUIDATOR_IS_BORROWER), 0);
}
/* Fail if repayAmount = 0 */
if (repayAmount == 0) {
return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_ZERO), 0);
}
/* Fail if repayAmount = -1 */
if (repayAmount == uint(-1)) {
return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX), 0);
}
/* Fail if repayBorrow fails */
(uint repayBorrowError, uint actualRepayAmount) = repayBorrowFresh(liquidator, borrower, repayAmount);
if (repayBorrowError != uint(Error.NO_ERROR)) {
return (fail(Error(repayBorrowError), FailureInfo.LIQUIDATE_REPAY_BORROW_FRESH_FAILED), 0);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/* We calculate the number of collateral tokens that will be seized */
(uint amountSeizeError, uint seizeTokens) = controller.liquidateCalculateSeizeTokens(address(this), address(pTokenCollateral), actualRepayAmount);
require(amountSeizeError == uint(Error.NO_ERROR), "LIQUIDATE_CONTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED");
/* Revert if borrower collateral token balance < seizeTokens */
require(pTokenCollateral.balanceOf(borrower) >= seizeTokens, "LIQUIDATE_SEIZE_TOO_MUCH");
// If this is also the collateral, run seizeInternal to avoid re-entrancy, otherwise make an external call
uint seizeError;
if (address(pTokenCollateral) == address(this)) {
seizeError = seizeInternal(address(this), liquidator, borrower, seizeTokens);
} else {
seizeError = pTokenCollateral.seize(liquidator, borrower, seizeTokens);
}
/* Revert if seize tokens fails (since we cannot be sure of side effects) */
require(seizeError == uint(Error.NO_ERROR), "token seizure failed");
/* We emit a LiquidateBorrow event */
emit LiquidateBorrow(liquidator, borrower, actualRepayAmount, address(pTokenCollateral), seizeTokens);
return (uint(Error.NO_ERROR), actualRepayAmount);
}
/**
* @notice Transfers collateral tokens (this market) to the liquidator.
* @dev Will fail unless called by another pToken during the process of liquidation.
* Its absolutely critical to use msg.sender as the borrowed pToken and not a parameter.
* @param liquidator The account receiving seized collateral
* @param borrower The account having collateral seized
* @param seizeTokens The number of pTokens to seize
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function seize(address liquidator, address borrower, uint seizeTokens) external override nonReentrant returns (uint) {
return seizeInternal(msg.sender, liquidator, borrower, seizeTokens);
}
/**
* @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 PToken.
* Its absolutely critical to use msg.sender as the seizer pToken and not a parameter.
* @param seizerToken The contract seizing the collateral (i.e. borrowed pToken)
* @param liquidator The account receiving seized collateral
* @param borrower The account having collateral seized
* @param seizeTokens The number of pTokens to seize
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function seizeInternal(address seizerToken, address liquidator, address borrower, uint seizeTokens) internal returns (uint) {
/* Fail if seize not allowed */
uint allowed = controller.seizeAllowed(address(this), seizerToken, liquidator, borrower, seizeTokens);
if (allowed != 0) {
return failOpaque(Error.CONTROLLER_REJECTION, FailureInfo.LIQUIDATE_SEIZE_CONTROLLER_REJECTION, allowed);
}
/* Fail if borrower = liquidator */
if (borrower == liquidator) {
return fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER);
}
MathError mathErr;
uint borrowerTokensNew;
uint liquidatorTokensNew;
/*
* We calculate the new borrower and liquidator token balances, failing on underflow/overflow:
* borrowerTokensNew = accountTokens[borrower] - seizeTokens
* liquidatorTokensNew = accountTokens[liquidator] + seizeTokens
*/
(mathErr, borrowerTokensNew) = subUInt(accountTokens[borrower], seizeTokens);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, uint(mathErr));
}
(mathErr, liquidatorTokensNew) = addUInt(accountTokens[liquidator], seizeTokens);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, uint(mathErr));
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/* We write the previously calculated values into storage */
accountTokens[borrower] = borrowerTokensNew;
accountTokens[liquidator] = liquidatorTokensNew;
/* Emit a Transfer event */
emit Transfer(borrower, liquidator, seizeTokens);
return uint(Error.NO_ERROR);
}
/*** Admin Functions ***/
/**
* @notice Sets a new controller for the market
* @dev Admin function to set a new controller
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setController(ControllerInterface newController) public override returns (uint) {
// Check caller is admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_CONTROLLER_OWNER_CHECK);
}
return _setControllerInternal(newController);
}
function _setControllerInternal(ControllerInterface newController) internal returns (uint) {
ControllerInterface oldController = controller;
// Ensure invoke controller.isController() returns true
require(newController.isController(), "marker method returned false");
// Set market's controller to newController
controller = newController;
// Emit NewController(oldController, newController)
emit NewController(oldController, newController);
return uint(Error.NO_ERROR);
}
/**
* @notice accrues interest and sets a new reserve factor for the protocol using _setReserveFactorFresh
* @dev Admin function to accrue interest and set a new reserve factor
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setReserveFactor(uint newReserveFactorMantissa) external override nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reserve factor change failed.
return fail(Error(error), FailureInfo.SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED);
}
// _setReserveFactorFresh emits reserve-factor-specific logs on errors, so we don't need to.
return _setReserveFactorFresh(newReserveFactorMantissa);
}
/**
* @notice Sets a new reserve factor for the protocol (*requires fresh interest accrual)
* @dev Admin function to set a new reserve factor
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setReserveFactorFresh(uint newReserveFactorMantissa) internal returns (uint) {
// Check caller is admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_RESERVE_FACTOR_ADMIN_CHECK);
}
// Verify market's block number equals current block number
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_RESERVE_FACTOR_FRESH_CHECK);
}
// Check newReserveFactor ≤ maxReserveFactor
if (newReserveFactorMantissa > reserveFactorMaxMantissa) {
return fail(Error.BAD_INPUT, FailureInfo.SET_RESERVE_FACTOR_BOUNDS_CHECK);
}
uint oldReserveFactorMantissa = reserveFactorMantissa;
reserveFactorMantissa = newReserveFactorMantissa;
emit NewReserveFactor(oldReserveFactorMantissa, newReserveFactorMantissa);
return uint(Error.NO_ERROR);
}
/**
* @notice Accrues interest and reduces reserves by transferring from msg.sender
* @param addAmount Amount of addition to reserves
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _addReservesInternal(uint addAmount) internal nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed.
return fail(Error(error), FailureInfo.ADD_RESERVES_ACCRUE_INTEREST_FAILED);
}
// _addReservesFresh emits reserve-addition-specific logs on errors, so we don't need to.
(error, ) = _addReservesFresh(addAmount);
return error;
}
/**
* @notice Add reserves by transferring from caller
* @dev Requires fresh interest accrual
* @param addAmount Amount of addition to reserves
* @return (uint, uint) An error code (0=success, otherwise a failure (see ErrorReporter.sol for details)) and the actual amount added, net token fees
*/
function _addReservesFresh(uint addAmount) internal returns (uint, uint) {
// totalReserves + actualAddAmount
uint totalReservesNew;
uint actualAddAmount;
// We fail gracefully unless market's block number equals current block number
if (accrualBlockNumber != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.ADD_RESERVES_FRESH_CHECK), actualAddAmount);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
/*
* We call doTransferIn for the caller and the addAmount
* Note: The pToken must handle variations between ERC-20 and ETH underlying.
* On success, the pToken holds an additional addAmount of cash.
* doTransferIn reverts if anything goes wrong, since we can't be sure if side effects occurred.
* it returns the amount actually transferred, in case of a fee.
*/
actualAddAmount = doTransferIn(msg.sender, addAmount);
totalReservesNew = totalReserves + actualAddAmount;
/* Revert on overflow */
require(totalReservesNew >= totalReserves, "add reserves unexpected overflow");
// Store reserves[n+1] = reserves[n] + actualAddAmount
totalReserves = totalReservesNew;
/* Emit NewReserves(admin, actualAddAmount, reserves[n+1]) */
emit ReservesAdded(msg.sender, actualAddAmount, totalReservesNew);
/* Return (NO_ERROR, actualAddAmount) */
return (uint(Error.NO_ERROR), actualAddAmount);
}
/**
* @notice Accrues interest and reduces reserves by transferring to admin
* @param reduceAmount Amount of reduction to reserves
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _reduceReserves(uint reduceAmount) external override nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted reduce reserves failed.
return fail(Error(error), FailureInfo.REDUCE_RESERVES_ACCRUE_INTEREST_FAILED);
}
// _reduceReservesFresh emits reserve-reduction-specific logs on errors, so we don't need to.
return _reduceReservesFresh(reduceAmount);
}
/**
* @notice Reduces reserves by transferring to admin
* @dev Requires fresh interest accrual
* @param reduceAmount Amount of reduction to reserves
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _reduceReservesFresh(uint reduceAmount) internal returns (uint) {
// totalReserves - reduceAmount
uint totalReservesNew;
address payable admin = getMyAdmin();
// Check caller is admin
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.REDUCE_RESERVES_ADMIN_CHECK);
}
// We fail gracefully unless market's block number equals current block number
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDUCE_RESERVES_FRESH_CHECK);
}
// Fail gracefully if protocol has insufficient underlying cash
if (getCashPrior() < reduceAmount) {
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDUCE_RESERVES_CASH_NOT_AVAILABLE);
}
// Check reduceAmount ≤ reserves[n] (totalReserves)
if (reduceAmount > totalReserves) {
return fail(Error.BAD_INPUT, FailureInfo.REDUCE_RESERVES_VALIDATION);
}
/////////////////////////
// EFFECTS & INTERACTIONS
// (No safe failures beyond this point)
totalReservesNew = totalReserves - reduceAmount;
// We checked reduceAmount <= totalReserves above, so this should never revert.
require(totalReservesNew <= totalReserves, "reduce reserves unexpected underflow");
// Store reserves[n+1] = reserves[n] - reduceAmount
totalReserves = totalReservesNew;
// doTransferOut reverts if anything goes wrong, since we can't be sure if side effects occurred.
doTransferOut(admin, reduceAmount);
emit ReservesReduced(admin, reduceAmount, totalReservesNew);
return uint(Error.NO_ERROR);
}
/**
* @notice accrues interest and updates the interest rate model using _setInterestRateModelFresh
* @dev Admin function to accrue interest and update the interest rate model
* @param newInterestRateModel the new interest rate model to use
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setInterestRateModel(InterestRateModel newInterestRateModel) public override returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
// accrueInterest emits logs on errors, but on top of that we want to log the fact that an attempted change of interest rate model failed
return fail(Error(error), FailureInfo.SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED);
}
// _setInterestRateModelFresh emits interest-rate-model-update-specific logs on errors, so we don't need to.
return _setInterestRateModelFresh(newInterestRateModel);
}
/**
* @notice updates the interest rate model (*requires fresh interest accrual)
* @dev Admin function to update the interest rate model
* @param newInterestRateModel the new interest rate model to use
* @return uint 0=success, otherwise a failure (see ErrorReporter.sol for details)
*/
function _setInterestRateModelFresh(InterestRateModel newInterestRateModel) internal returns (uint) {
// Check caller is admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_INTEREST_RATE_MODEL_OWNER_CHECK);
}
return _setInterestRateModelFreshInternal(newInterestRateModel);
}
function _setInterestRateModelFreshInternal(InterestRateModel newInterestRateModel) internal returns (uint) {
// Used to store old model for use in the event that is emitted on success
InterestRateModel oldInterestRateModel;
// We fail gracefully unless market's block number equals current block number
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_INTEREST_RATE_MODEL_FRESH_CHECK);
}
// Track the market's current interest rate model
oldInterestRateModel = interestRateModel;
// Ensure invoke newInterestRateModel.isInterestRateModel() returns true
require(newInterestRateModel.isInterestRateModel(), "marker method returned false");
// Set the interest rate model to newInterestRateModel
interestRateModel = newInterestRateModel;
// Emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel)
emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel);
return uint(Error.NO_ERROR);
}
function getMyAdmin() public view returns (address payable) {
return RegistryInterface(registry).admin();
}
/*** 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 (uint);
/**
* @dev Performs a transfer in, reverting upon failure. Returns the amount actually transferred to the protocol, in case of a fee.
* This may revert due to insufficient balance or insufficient allowance.
*/
function doTransferIn(address from, uint amount) internal virtual returns (uint);
/**
* @dev Performs a transfer out, ideally returning an explanatory error code upon failure tather than reverting.
* If caller has not called checked protocol's balance, may revert due to insufficient cash held in the contract.
* If caller has checked protocol's balance, and verified it is >= amount, this should not revert in normal conditions.
*/
function doTransferOut(address payable to, uint amount) internal 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
}
}pragma solidity ^0.7.4;
import "./ControllerInterface.sol";
import "./InterestRateModel.sol";
import "./ProxyWithRegistry.sol";
contract PTokenStorage is ProxyWithRegistryStorage {
/**
* @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;
/**
* @dev Maximum borrow rate that can ever be applied (.0005% / block)
*/
uint internal constant borrowRateMaxMantissa = 0.0005e16;
/**
* @dev Maximum fraction of interest that can be set aside for reserves
*/
uint internal constant reserveFactorMaxMantissa = 1e18;
/**
* @notice Contract which oversees inter-pToken operations
*/
ControllerInterface public controller;
/**
* @notice Model which tells what the current interest rate should be
*/
InterestRateModel public interestRateModel;
/**
* @dev Initial exchange rate used when minting the first PTokens (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;
/**
* @dev Official record of token balances for each account
*/
mapping (address => uint) internal accountTokens;
/**
* @dev 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;
}
/**
* @dev Mapping of account addresses to outstanding borrow balances
*/
mapping(address => BorrowSnapshot) internal accountBorrows;
}
abstract contract PTokenInterface is PTokenStorage {
/**
* @notice Indicator that this is a PToken contract (for inspection)
*/
bool public constant isPToken = true;
/*** Market Events ***/
/**
* @notice Event emitted when interest is accrued
*/
event AccrueInterest(uint cashPrior, uint interestAccumulated, uint borrowIndex, uint totalBorrows, uint totalReserves);
/**
* @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 pTokenCollateral, uint seizeTokens);
/*** Admin Events ***/
/**
* @notice Event emitted when controller is changed
*/
event NewController(ControllerInterface oldController, ControllerInterface newController);
/**
* @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);
/**
* @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) external virtual returns (bool);
function transferFrom(address src, address dst, uint amount) external virtual returns (bool);
function approve(address spender, uint amount) external virtual returns (bool);
function allowance(address owner, address spender) external view virtual returns (uint);
function balanceOf(address owner) external view virtual returns (uint);
function balanceOfUnderlying(address owner) external virtual returns (uint);
function getAccountSnapshot(address account) external view virtual returns (uint, uint, uint, uint);
function borrowRatePerBlock() external view virtual returns (uint);
function supplyRatePerBlock() external view virtual returns (uint);
function totalBorrowsCurrent() external virtual returns (uint);
function borrowBalanceCurrent(address account) external virtual returns (uint);
function borrowBalanceStored(address account) public view virtual returns (uint);
function exchangeRateCurrent() public virtual returns (uint);
function exchangeRateStored() public view virtual returns (uint);
function getCash() external view virtual returns (uint);
function accrueInterest() public virtual returns (uint);
function seize(address liquidator, address borrower, uint seizeTokens) external virtual returns (uint);
/*** Admin Functions ***/
function _setController(ControllerInterface newController) public virtual returns (uint);
function _setReserveFactor(uint newReserveFactorMantissa) external virtual returns (uint);
function _reduceReserves(uint reduceAmount) external virtual returns (uint);
function _setInterestRateModel(InterestRateModel newInterestRateModel) public virtual returns (uint);
}
contract PErc20Storage {
/**
* @notice Underlying asset for this PToken
*/
address public underlying;
}
abstract contract PErc20Interface is PErc20Storage {
/*** User Interface ***/
function mint(uint mintAmount) external virtual returns (uint);
function redeem(uint redeemTokens) external virtual returns (uint);
function redeemUnderlying(uint redeemAmount) external virtual returns (uint);
function borrow(uint borrowAmount) external virtual returns (uint);
function repayBorrow(uint repayAmount) external virtual returns (uint);
function repayBorrowBehalf(address borrower, uint repayAmount) external virtual returns (uint);
function liquidateBorrow(address borrower, uint repayAmount, PTokenInterface pTokenCollateral) external virtual returns (uint);
/*** Admin Functions ***/
function _addReserves(uint addAmount) external virtual returns (uint);
}
contract PPIEStorage {
/// @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 => uint) public nonces;
}
abstract contract PPIEInterface is PPIEStorage {
/// @notice An event thats emitted when an account changes its delegate
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
/// @notice An event thats emitted when a delegate account's vote balance changes
event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);
function delegate(address delegatee) external virtual;
function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) external virtual;
function getCurrentVotes(address account) external view virtual returns (uint96);
function getPriorVotes(address account, uint blockNumber) external view virtual returns (uint96);
}pragma solidity ^0.7.4;
abstract contract PriceOracle {
/// @notice Indicator that this is a PriceOracle contract (for inspection)
bool public constant isPriceOracle = true;
event PriceUpdated(address asset, uint price);
/**
* @notice Get the underlying price of a pToken asset
* @param pToken The pToken to get the underlying price of
* @return The underlying asset price mantissa (scaled by 1e18).
* Zero means the price is unavailable.
*/
function getUnderlyingPrice(address pToken) external view virtual returns (uint);
function updateUnderlyingPrice(address pToken) external virtual returns (uint);
}pragma solidity ^0.7.4;
import "./RegistryInterface.sol";
contract ProxyWithRegistryStorage {
/**
* @notice Address of the registry contract
*/
address public registry;
}
abstract contract ProxyWithRegistryInterface is ProxyWithRegistryStorage {
function _setRegistry(address _registry) internal virtual;
function _pTokenImplementation() internal view virtual returns (address);
}
contract ProxyWithRegistry is ProxyWithRegistryInterface {
/**
* Returns actual address of the implementation contract from current registry
* @return registry Address of the registry
*/
function _pTokenImplementation() internal view override returns (address) {
return RegistryInterface(registry).pTokenImplementation();
}
function _setRegistry(address _registry) internal override {
registry = _registry;
}
}
contract ImplementationStorage {
address public implementation;
function _setImplementation(address implementation_) internal {
implementation = implementation_;
}
}pragma solidity ^0.7.4;
interface RegistryInterface {
/**
* Returns admin address for cToken contracts
* @return admin address
*/
function admin() external view returns (address payable);
/**
* Returns address of actual PToken implementation contract
* @return Address of contract
*/
function pTokenImplementation() external view returns (address);
function addPToken(address underlying, address pToken) external returns(uint);
function addPETH(address pETH_) external returns(uint);
function addPPIE(address pPIE_) external returns(uint);
}pragma solidity ^0.7.4;
import "./ErrorReporter.sol";
import "./ControllerStorage.sol";
/**
* @title ControllerCore
* @dev Storage for the controller is at this address, while execution is delegated to the `controllerImplementation`.
* PTokens should reference this contract as their controller.
*/
contract Unitroller is UnitrollerAdminStorage, ControllerErrorReporter {
/**
* @notice Emitted when pendingControllerImplementation is changed
*/
event NewPendingImplementation(address oldPendingImplementation, address newPendingImplementation);
/**
* @notice Emitted when pendingControllerImplementation is accepted, which means controller 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() {
// 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 = pendingControllerImplementation;
pendingControllerImplementation = newPendingImplementation;
emit NewPendingImplementation(oldPendingImplementation, pendingControllerImplementation);
return uint(Error.NO_ERROR);
}
/**
* @notice Accepts new implementation of controller. 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 != pendingControllerImplementation || pendingControllerImplementation == address(0)) {
return fail(Error.UNAUTHORIZED, FailureInfo.ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK);
}
// Save current values for inclusion in log
address oldImplementation = controllerImplementation;
address oldPendingImplementation = pendingControllerImplementation;
controllerImplementation = pendingControllerImplementation;
pendingControllerImplementation = address(0);
emit NewImplementation(oldImplementation, controllerImplementation);
emit NewPendingImplementation(oldPendingImplementation, pendingControllerImplementation);
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
if (msg.sender != pendingAdmin) {
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, ) = controllerImplementation.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()) }
}
}
}{
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs",
"useLiteralContent": true
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": [],
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"abi"
]
}
}
}[{"inputs":[{"internalType":"address","name":"_controller","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"allMarkets","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"},{"internalType":"address[]","name":"pTokens","type":"address[]"}],"name":"calcClaimPie","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"}],"name":"calcClaimPie","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"},{"internalType":"address[]","name":"pTokens","type":"address[]"}],"name":"calcClaimPieWithoutAccrued","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"}],"name":"checkClaimPieMarkets","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"},{"internalType":"address[]","name":"pTokens","type":"address[]"}],"name":"checkClaimPieMarkets","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"controller","outputs":[{"internalType":"contract Controller","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBlockNumber","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pToken","type":"address"},{"components":[{"internalType":"uint256","name":"mantissa","type":"uint256"}],"internalType":"struct Exponential.Exp","name":"marketBorrowIndex","type":"tuple"}],"name":"updatePieBorrowIndex","outputs":[{"components":[{"internalType":"uint256","name":"mantissa","type":"uint256"}],"internalType":"struct Exponential.Double","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pToken","type":"address"}],"name":"updatePieSupplyIndex","outputs":[{"components":[{"internalType":"uint256","name":"mantissa","type":"uint256"}],"internalType":"struct Exponential.Double","name":"","type":"tuple"}],"stateMutability":"view","type":"function"}]Contract Creation Code
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
Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000d204be259f703503ef2ea03eb401ce6e07254d96
-----Decoded View---------------
Arg [0] : _controller (address): 0xd204be259f703503ef2ea03eb401ce6e07254d96
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000d204be259f703503ef2ea03eb401ce6e07254d96
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.