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Contract Name:
PTokenFactory
Compiler Version
v0.7.6+commit.7338295f
Contract Source Code (Solidity Standard Json-Input format)
pragma solidity ^0.7.6;
/**
* @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 ^0.7.6;
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 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 ***/
/**
* @notice Set PIE speed for a single market
* @param pToken The market whose PIE speed to update
* @param pieSpeed New PIE speed for market
*/
function setPieSpeedInternal(address pToken, uint pieSpeed) internal {
uint currentPieSpeed = pieSpeeds[pToken];
if (currentPieSpeed != 0) {
// note that PIE speed could be set to 0 to halt liquidity rewards for a market
Exp memory borrowIndex = Exp({mantissa: PTokenInterface(pToken).borrowIndex()});
updatePieSupplyIndex(pToken);
updatePieBorrowIndex(pToken, borrowIndex);
} else if (pieSpeed != 0) {
// Add the PIE market
Market storage market = markets[pToken];
require(market.isListed == true, "pie market is not listed");
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");
}
}
if (currentPieSpeed != pieSpeed) {
pieSpeeds[pToken] = pieSpeed;
emit PieSpeedUpdated(pToken, pieSpeed);
}
}
/**
* @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 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);
}
}
}
}
/**
* @notice Transfer PIE to the user
* @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 userAccrued 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;
}
/*** Pie Distribution Admin ***/
/**
* @notice Set PIE speed for a single market
* @param pToken The market whose PIE speed to update
* @param pieSpeed New PIE speed for market
*/
function _setPieSpeed(address pToken, uint pieSpeed) public {
require(msg.sender == admin, "only admin can set pie speed");
setPieSpeedInternal(pToken, pieSpeed);
}
/**
* @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 ^0.7.6;
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 ^0.7.6;
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 ^0.7.6;
/**
* @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 ^0.7.6;
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,
POOL_OR_COIN_EXIST,
UNAUTHORIZED,
UPDATE_PRICE
}
enum FailureInfo {
ADD_POOL_OR_COIN,
NO_PAIR,
NO_RESERVES,
PERIOD_NOT_ELAPSED,
SET_NEW_IMPLEMENTATION,
UPDATE_DATA
}
/**
* @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_LIQUIDITY_IN_POOL_OR_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 ^0.7.6;
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 ^0.7.6;
import "./SafeMath.sol";
interface AggregatorInterface {
function latestAnswer() external view returns (int256);
}
library UQ112x112 {
uint224 constant Q112 = 2**112;
// encode a uint112 as a UQ112x112
function encode(uint112 y) internal pure returns (uint224 z) {
z = uint224(y) * Q112; // never overflows
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
z = x / uint224(y);
}
}
library FixedPoint {
// range: [0, 2**112 - 1]
// resolution: 1 / 2**112
struct uq112x112 {
uint224 _x;
}
// range: [0, 2**144 - 1]
// resolution: 1 / 2**112
struct uq144x112 {
uint _x;
}
uint8 private constant RESOLUTION = 112;
// multiply a UQ112x112 by a uint, returning a UQ144x112
// reverts on overflow
function mul(uq112x112 memory self, uint y) internal pure returns (uq144x112 memory) {
uint z;
require(y == 0 || (z = uint(self._x) * y) / y == uint(self._x), "FixedPoint: MULTIPLICATION_OVERFLOW");
return uq144x112(z);
}
// decode a UQ144x112 into a uint144 by truncating after the radix point
function decode144(uq144x112 memory self) internal pure returns (uint144) {
return uint144(self._x >> RESOLUTION);
}
}
interface IUniswapV2Pair {
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function price0CumulativeLast() external view returns (uint);
function price1CumulativeLast() external view returns (uint);
}
interface IUniswapV2Factory {
function getPair(address tokenA, address tokenB) external view returns (address pair);
}pragma solidity ^0.7.6;
/**
* @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 ^0.7.6;
import "./ProxyWithRegistry.sol";
import "./RegistryInterface.sol";
/**
* @title DeFiPie's PErc20Delegator Contract
* @notice PTokens which wrap an EIP-20 underlying and delegate to an implementation
* @author DeFiPie
*/
contract PErc20Delegator is ProxyWithRegistry {
/**
* @notice Construct a new money market
* @param underlying_ The address of the underlying asset
* @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 initialReserveFactorMantissa_ The initial reserve factor, scaled by 1e18
* @param name_ ERC-20 name of this token
* @param symbol_ ERC-20 symbol of this token
* @param decimals_ ERC-20 decimal precision of this token
* @param registry_ The address of the registry contract
*/
constructor(
address underlying_,
address controller_,
address interestRateModel_,
uint initialExchangeRateMantissa_,
uint initialReserveFactorMantissa_,
string memory name_,
string memory symbol_,
uint8 decimals_,
address registry_
) {
// Set registry
_setRegistry(registry_);
// First delegate gets to initialize the delegator (i.e. storage contract)
delegateTo(_pTokenImplementation(), abi.encodeWithSignature("initialize(address,address,address,address,uint256,uint256,string,string,uint8)",
underlying_,
registry_,
controller_,
interestRateModel_,
initialExchangeRateMantissa_,
initialReserveFactorMantissa_,
name_,
symbol_,
decimals_));
}
/**
* @notice Internal method to delegate execution to another contract
* @dev It returns to the external caller whatever the implementation returns or forwards reverts
* @param callee The contract to delegatecall
* @param data The raw data to delegatecall
* @return The returned bytes from the delegatecall
*/
function delegateTo(address callee, bytes memory data) internal returns (bytes memory) {
(bool success, bytes memory returnData) = callee.delegatecall(data);
assembly {
if eq(success, 0) {
revert(add(returnData, 0x20), returndatasize())
}
}
return returnData;
}
function delegateAndReturn() internal returns (bytes memory) {
(bool success, ) = _pTokenImplementation().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()) }
}
}
/**
* @notice Delegates execution to an implementation contract
* @dev It returns to the external caller whatever the implementation returns or forwards reverts
*/
fallback() external {
// delegate all other functions to current implementation
delegateAndReturn();
}
}pragma solidity ^0.7.6;
import "./ProxyWithRegistry.sol";
import "./RegistryInterface.sol";
import "./ErrorReporter.sol";
/**
* @title DeFiPie's PETHDelegator Contract
* @notice PETH which wrap a delegate to an implementation
* @author DeFiPie
*/
contract PETHDelegator is ImplementationStorage, ProxyWithRegistry, TokenErrorReporter {
/**
* @notice Emitted when implementation is changed
*/
event NewImplementation(address oldImplementation, address newImplementation);
/**
* @notice Construct a new money market
* @param pETHImplementation_ The address of the PEthImplementation
* @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 initialReserveFactorMantissa_ The initial reserve factor, scaled by 1e18
* @param name_ ERC-20 name of this token
* @param symbol_ ERC-20 symbol of this token
* @param decimals_ ERC-20 decimal precision of this token
* @param registry_ The address of the registry contract
*/
constructor(
address pETHImplementation_,
address controller_,
address interestRateModel_,
uint initialExchangeRateMantissa_,
uint initialReserveFactorMantissa_,
string memory name_,
string memory symbol_,
uint8 decimals_,
address registry_
) {
// Set registry
_setRegistry(registry_);
_setImplementation(pETHImplementation_);
// First delegate gets to initialize the delegator (i.e. storage contract)
delegateTo(implementation, abi.encodeWithSignature("initialize(address,address,address,uint256,uint256,string,string,uint8)",
registry_,
controller_,
interestRateModel_,
initialExchangeRateMantissa_,
initialReserveFactorMantissa_,
name_,
symbol_,
decimals_));
}
/**
* @notice Internal method to delegate execution to another contract
* @dev It returns to the external caller whatever the implementation returns or forwards reverts
* @param callee The contract to delegatecall
* @param data The raw data to delegatecall
* @return The returned bytes from the delegatecall
*/
function delegateTo(address callee, bytes memory data) internal returns (bytes memory) {
(bool success, bytes memory returnData) = callee.delegatecall(data);
assembly {
if eq(success, 0) {
revert(add(returnData, 0x20), returndatasize())
}
}
return returnData;
}
function delegateAndReturn() private returns (bytes memory) {
(bool success, ) = implementation.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()) }
}
}
/**
* @notice Delegates execution to an implementation contract
* @dev It returns to the external caller whatever the implementation returns or forwards reverts
*/
fallback() external payable {
// delegate all other functions to current implementation
delegateAndReturn();
}
receive() external payable {
// delegate all other functions to current implementation
delegateAndReturn();
}
function setImplementation(address newImplementation) external returns(uint) {
if (msg.sender != RegistryInterface(registry).admin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_IMPLEMENTATION);
}
address oldImplementation = implementation;
_setImplementation(newImplementation);
emit NewImplementation(oldImplementation, implementation);
return(uint(Error.NO_ERROR));
}
}pragma solidity ^0.7.6;
import "./ProxyWithRegistry.sol";
import "./RegistryInterface.sol";
import "./ErrorReporter.sol";
/**
* @title DeFiPie's PPIEDelegator Contract
* @notice PPIE which wrap an EIP-20 underlying and delegate to an implementation
* @author DeFiPie
*/
contract PPIEDelegator is ImplementationStorage, ProxyWithRegistry, TokenErrorReporter {
/**
* @notice Emitted when implementation is changed
*/
event NewImplementation(address oldImplementation, address newImplementation);
/**
* @notice Construct a new money market
* @param underlying_ The address of the underlying asset
* @param pPIEImplementation_ The address of the PPIEImplementation
* @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 initialReserveFactorMantissa_ The initial reserve factor, scaled by 1e18
* @param name_ ERC-20 name of this token
* @param symbol_ ERC-20 symbol of this token
* @param decimals_ ERC-20 decimal precision of this token
* @param registry_ The address of the registry contract
*/
constructor(
address underlying_,
address pPIEImplementation_,
address controller_,
address interestRateModel_,
uint initialExchangeRateMantissa_,
uint initialReserveFactorMantissa_,
string memory name_,
string memory symbol_,
uint8 decimals_,
address registry_
) {
// Set registry
_setRegistry(registry_);
_setImplementation(pPIEImplementation_);
// First delegate gets to initialize the delegator (i.e. storage contract)
delegateTo(implementation, abi.encodeWithSignature("initialize(address,address,address,address,uint256,uint256,string,string,uint8)",
underlying_,
registry_,
controller_,
interestRateModel_,
initialExchangeRateMantissa_,
initialReserveFactorMantissa_,
name_,
symbol_,
decimals_));
}
/**
* @notice Internal method to delegate execution to another contract
* @dev It returns to the external caller whatever the implementation returns or forwards reverts
* @param callee The contract to delegatecall
* @param data The raw data to delegatecall
* @return The returned bytes from the delegatecall
*/
function delegateTo(address callee, bytes memory data) internal returns (bytes memory) {
(bool success, bytes memory returnData) = callee.delegatecall(data);
assembly {
if eq(success, 0) {
revert(add(returnData, 0x20), returndatasize())
}
}
return returnData;
}
function delegateAndReturn() internal returns (bytes memory) {
(bool success, ) = implementation.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()) }
}
}
/**
* @notice Delegates execution to an implementation contract
* @dev It returns to the external caller whatever the implementation returns or forwards reverts
*/
fallback() external {
// delegate all other functions to current implementation
delegateAndReturn();
}
function setImplementation(address newImplementation) external returns(uint) {
if (msg.sender != RegistryInterface(registry).admin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_IMPLEMENTATION);
}
address oldImplementation = implementation;
_setImplementation(newImplementation);
emit NewImplementation(oldImplementation, implementation);
return(uint(Error.NO_ERROR));
}
}pragma solidity ^0.7.6;
import './PErc20Delegator.sol';
import './RegistryInterface.sol';
import './EIP20Interface.sol';
import './Strings.sol';
import "./IPriceFeeds.sol";
import "./ErrorReporter.sol";
import "./SafeMath.sol";
import "./PEtherDelegator.sol";
import "./PPIEDelegator.sol";
import "./Controller.sol";
import "./UniswapPriceOracle.sol";
contract PTokenFactory is FactoryErrorReporter {
using strings for *;
using SafeMath for uint;
UniswapPriceOracle public oracle;
uint public minUniswapLiquidity;
// decimals for pToken
uint8 public decimals = 8;
// default parameters for pToken
address public controller;
address public interestRateModel;
uint256 public initialExchangeRateMantissa;
uint256 public initialReserveFactorMantissa;
/**
* Fired on creation new pToken proxy
* @param newPToken Address of new PToken proxy contract
*/
event PTokenCreated(address newPToken);
RegistryInterface public registry;
constructor(
RegistryInterface registry_,
uint minUniswapLiquidity_,
address oracle_,
address _controller,
address _interestRateModel,
uint256 _initialExchangeRateMantissa,
uint256 _initialReserveFactorMantissa
) {
registry = registry_;
minUniswapLiquidity = minUniswapLiquidity_;
oracle = UniswapPriceOracle(oracle_);
controller = _controller;
interestRateModel = _interestRateModel;
initialExchangeRateMantissa = _initialExchangeRateMantissa;
initialReserveFactorMantissa = _initialReserveFactorMantissa;
}
/**
* Creates new pToken proxy contract and adds pToken to the controller
* @param underlying_ The address of the underlying asset
*/
function createPToken(address underlying_) external returns (uint) {
if (!checkPair(underlying_)) {
return fail(Error.INVALID_POOL, FailureInfo.DEFICIENCY_LIQUIDITY_IN_POOL_OR_PAIR_IS_NOT_EXIST);
}
(string memory name, string memory symbol) = _createPTokenNameAndSymbol(underlying_);
uint power = EIP20Interface(underlying_).decimals();
uint exchangeRateMantissa = calcExchangeRate(power);
PErc20Delegator newPToken = new PErc20Delegator(underlying_, controller, interestRateModel, exchangeRateMantissa, initialReserveFactorMantissa, name, symbol, decimals, address(registry));
uint256 result = Controller(controller)._supportMarket(address(newPToken));
if (result != 0) {
return fail(Error.MARKET_NOT_LISTED, FailureInfo.SUPPORT_MARKET_BAD_RESULT);
}
registry.addPToken(underlying_, address(newPToken));
emit PTokenCreated(address(newPToken));
oracle.update(underlying_);
return uint(Error.NO_ERROR);
}
function createPETH(address pETHImplementation_) external virtual returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.CREATE_PETH_POOL);
}
string memory name = "DeFiPie ETH";
string memory symbol = "pETH";
uint power = 18;
uint exchangeRateMantissa = calcExchangeRate(power);
PETHDelegator newPETH = new PETHDelegator(pETHImplementation_, controller, interestRateModel, exchangeRateMantissa, initialReserveFactorMantissa, name, symbol, decimals, address(registry));
uint256 result = Controller(controller)._supportMarket(address(newPETH));
if (result != 0) {
return fail(Error.MARKET_NOT_LISTED, FailureInfo.SUPPORT_MARKET_BAD_RESULT);
}
registry.addPETH(address(newPETH));
emit PTokenCreated(address(newPETH));
return uint(Error.NO_ERROR);
}
function createPPIE(address underlying_, address pPIEImplementation_) external virtual returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.CREATE_PPIE_POOL);
}
string memory name = "DeFiPie PIE";
string memory symbol = "pPIE";
uint power = EIP20Interface(underlying_).decimals();
uint exchangeRateMantissa = calcExchangeRate(power);
PPIEDelegator newPPIE = new PPIEDelegator(underlying_, pPIEImplementation_, controller, interestRateModel, exchangeRateMantissa, initialReserveFactorMantissa, name, symbol, decimals, address(registry));
uint256 result = Controller(controller)._supportMarket(address(newPPIE));
if (result != 0) {
return fail(Error.MARKET_NOT_LISTED, FailureInfo.SUPPORT_MARKET_BAD_RESULT);
}
registry.addPPIE(address(newPPIE));
emit PTokenCreated(address(newPPIE));
oracle.update(underlying_);
return uint(Error.NO_ERROR);
}
function checkPair(address asset) public view returns (bool) {
(address pair, uint112 ethEquivalentReserves) = oracle.searchPair(asset);
return bool(pair != address(0) && ethEquivalentReserves >= minUniswapLiquidity);
}
function setMinUniswapLiquidity(uint minUniswapLiquidity_) public returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_MIN_LIQUIDITY_OWNER_CHECK);
}
minUniswapLiquidity = minUniswapLiquidity_;
return uint(Error.NO_ERROR);
}
function setOracle(address oracle_) public returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_ORACLE);
}
oracle = UniswapPriceOracle(oracle_);
return uint(Error.NO_ERROR);
}
/**
* Sets address of actual controller contract
* @return uint 0 = success, otherwise a failure (see ErrorReporter.sol for details)
*/
function setController(address newController) external returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_CONTROLLER);
}
controller = newController;
return(uint(Error.NO_ERROR));
}
/**
* Sets address of actual interestRateModel contract
* @return uint 0 = success, otherwise a failure (see ErrorReporter.sol for details)
*/
function setInterestRateModel(address newInterestRateModel) external returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_INTEREST_RATE_MODEL);
}
interestRateModel = newInterestRateModel;
return(uint(Error.NO_ERROR));
}
/**
* Sets initial exchange rate
* @return uint 0 = success, otherwise a failure (see ErrorReporter.sol for details)
*/
function setInitialExchangeRateMantissa(uint _initialExchangeRateMantissa) external returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_EXCHANGE_RATE);
}
initialExchangeRateMantissa = _initialExchangeRateMantissa;
return(uint(Error.NO_ERROR));
}
function setInitialReserveFactorMantissa(uint _initialReserveFactorMantissa) external returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_RESERVE_FACTOR);
}
initialReserveFactorMantissa = _initialReserveFactorMantissa;
return(uint(Error.NO_ERROR));
}
function setPTokenDecimals(uint _decimals) external returns (uint) {
if (msg.sender != getAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_DECIMALS);
}
decimals = uint8(_decimals);
return(uint(Error.NO_ERROR));
}
function getAdmin() public view returns(address payable) {
return registry.admin();
}
function _createPTokenNameAndSymbol(address underlying) internal view returns (string memory, string memory) {
string memory name = ("DeFiPie ".toSlice().concat(EIP20Interface(underlying).name().toSlice()));
string memory symbol = ("p".toSlice().concat(EIP20Interface(underlying).symbol().toSlice()));
return (name, symbol);
}
function calcExchangeRate(uint power) internal view returns (uint) {
uint factor;
if (decimals >= power) {
factor = 10**(decimals - power);
return initialExchangeRateMantissa.div(factor);
} else {
factor = 10**(power - decimals);
return initialExchangeRateMantissa.mul(factor);
}
}
}pragma solidity ^0.7.6;
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 ^0.7.6;
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 ^0.7.6;
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 ^0.7.6;
import "./PTokenInterfaces.sol";
import './RegistryStorage.sol';
import "./ErrorReporter.sol";
import "./Controller.sol";
import "./PTokenFactory.sol";
contract Registry is RegistryStorage, RegistryErrorReporter {
address public factory;
address public pTokenImplementation;
mapping (address => address) public pTokens;
address public pETH;
address public pPIE;
/*** Admin Events ***/
/**
* @notice Event emitted when pendingAdmin is changed
*/
event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);
/**
* @notice Event emitted when pendingAdmin is accepted, which means admin is updated
*/
event NewAdmin(address oldAdmin, address newAdmin);
/**
* @notice Emitted when PTokenImplementation is changed
*/
event NewPTokenImplementation(address oldImplementation, address newImplementation);
/**
* @notice Emitted when Factory address is changed
*/
event NewFactory(address oldFactory, address newFactory);
/**
* @notice Emitted when admin remove pToken
*/
event RemovePToken(address pToken);
constructor() {}
function initialize(address _pTokenImplementation) public {
require(pTokenImplementation == address(0), "Registry may only be initialized once");
pTokenImplementation = _pTokenImplementation;
}
/**
* Sets address of actual pToken implementation contract
* @return uint 0 = success, otherwise a failure (see ErrorReporter.sol for details)
*/
function setPTokenImplementation(address newImplementation) external returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_IMPLEMENTATION);
}
address oldImplementation = pTokenImplementation;
pTokenImplementation = newImplementation;
emit NewPTokenImplementation(oldImplementation, pTokenImplementation);
return(uint(Error.NO_ERROR));
}
function _setFactoryContract(address _factory) external returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_NEW_FACTORY);
}
address oldFactory = factory;
factory = _factory;
emit NewFactory(oldFactory, factory);
return uint(Error.NO_ERROR);
}
function addPToken(address underlying, address pToken) public returns (uint) {
require(msg.sender == admin || msg.sender == factory, "Only admin or factory can add PTokens");
PTokenInterface(pToken).isPToken(); // Sanity check to make sure its really a PToken
require(pTokens[underlying] == address(0), "Token already added");
pTokens[underlying] = pToken;
return uint(Error.NO_ERROR);
}
function addPETH(address pETH_) public returns (uint) {
require(msg.sender == admin || msg.sender == factory, "Only admin or factory can add PETH");
PTokenInterface(pETH_).isPToken(); // Sanity check to make sure its really a PToken
require(pETH == address(0), "ETH already added");
pETH = pETH_;
return uint(Error.NO_ERROR);
}
function addPPIE(address pPIE_) public returns (uint) {
require(msg.sender == admin || msg.sender == factory, "Only admin or factory can add PPIE");
PTokenInterface(pPIE_).isPToken(); // Sanity check to make sure its really a PToken
require(pPIE == address(0), "PIE already added");
pPIE = pPIE_;
address underlying = PErc20Storage(pPIE).underlying();
pTokens[underlying] = pPIE;
return uint(Error.NO_ERROR);
}
function removePToken(address pToken) public returns (uint) {
require(msg.sender == admin, "Only admin can remove PTokens");
PTokenInterface(pToken).isPToken(); // Sanity check to make sure its really a PToken
address underlying = PErc20Storage(pToken).underlying();
require(pTokens[underlying] != address(0), "Token not added");
delete pTokens[underlying];
emit RemovePToken(pToken);
return uint(Error.NO_ERROR);
}
}pragma solidity ^0.7.6;
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 ^0.7.6;
contract RegistryStorage {
address public implementation;
address public admin;
address public pendingAdmin;
}pragma solidity ^0.7.6;
// From https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/Math.sol
// Subject to the MIT license.
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the addition of two unsigned integers, reverting with custom message on overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, errorMessage);
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot underflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction underflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot underflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, errorMessage);
return c;
}
/**
* @dev Returns the integer division of two unsigned integers.
* Reverts on division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers.
* Reverts with custom message on division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}/* * @title String & slice utility library for Solidity contracts. * @author Nick Johnson <[email protected]> * * @dev Functionality in this library is largely implemented using an * abstraction called a 'slice'. A slice represents a part of a string - * anything from the entire string to a single character, or even no * characters at all (a 0-length slice). Since a slice only has to specify * an offset and a length, copying and manipulating slices is a lot less * expensive than copying and manipulating the strings they reference. * * To further reduce gas costs, most functions on slice that need to return * a slice modify the original one instead of allocating a new one; for * instance, `s.split(".")` will return the text up to the first '.', * modifying s to only contain the remainder of the string after the '.'. * In situations where you do not want to modify the original slice, you * can make a copy first with `.copy()`, for example: * `s.copy().split(".")`. Try and avoid using this idiom in loops; since * Solidity has no memory management, it will result in allocating many * short-lived slices that are later discarded. * * Functions that return two slices come in two versions: a non-allocating * version that takes the second slice as an argument, modifying it in * place, and an allocating version that allocates and returns the second * slice; see `nextRune` for example. * * Functions that have to copy string data will return strings rather than * slices; these can be cast back to slices for further processing if * required. * * For convenience, some functions are provided with non-modifying * variants that create a new slice and return both; for instance, * `s.splitNew('.')` leaves s unmodified, and returns two values * corresponding to the left and right parts of the string. */ pragma solidity ^0.7.6; library strings { struct slice { uint _len; uint _ptr; } function memcpy(uint dest, uint src, uint leng) private pure { // Copy word-length chunks while possible for(; leng >= 32; leng -= 32) { assembly { mstore(dest, mload(src)) } dest += 32; src += 32; } // Copy remaining bytes uint mask = 256 ** (32 - leng) - 1; assembly { let srcpart := and(mload(src), not(mask)) let destpart := and(mload(dest), mask) mstore(dest, or(destpart, srcpart)) } } /* * @dev Returns a slice containing the entire string. * @param self The string to make a slice from. * @return A newly allocated slice containing the entire string. */ function toSlice(string memory self) internal pure returns (slice memory) { uint ptr; assembly { ptr := add(self, 0x20) } return slice(bytes(self).length, ptr); } /* * @dev Returns the length of a null-terminated bytes32 string. * @param self The value to find the length of. * @return The length of the string, from 0 to 32. */ function len(bytes32 self) internal pure returns (uint) { uint ret; if (self == 0) return 0; if (uint(self) & 0xffffffffffffffffffffffffffffffff == 0) { ret += 16; self = bytes32(uint(self) / 0x100000000000000000000000000000000); } if (uint(self) & 0xffffffffffffffff == 0) { ret += 8; self = bytes32(uint(self) / 0x10000000000000000); } if (uint(self) & 0xffffffff == 0) { ret += 4; self = bytes32(uint(self) / 0x100000000); } if (uint(self) & 0xffff == 0) { ret += 2; self = bytes32(uint(self) / 0x10000); } if (uint(self) & 0xff == 0) { ret += 1; } return 32 - ret; } /* * @dev Returns a slice containing the entire bytes32, interpreted as a * null-terminated utf-8 string. * @param self The bytes32 value to convert to a slice. * @return A new slice containing the value of the input argument up to the * first null. */ function toSliceB32(bytes32 self) internal pure returns (slice memory ret) { // Allocate space for `self` in memory, copy it there, and point ret at it assembly { let ptr := mload(0x40) mstore(0x40, add(ptr, 0x20)) mstore(ptr, self) mstore(add(ret, 0x20), ptr) } ret._len = len(self); } /* * @dev Returns a new slice containing the same data as the current slice. * @param self The slice to copy. * @return A new slice containing the same data as `self`. */ function copy(slice memory self) internal pure returns (slice memory) { return slice(self._len, self._ptr); } /* * @dev Copies a slice to a new string. * @param self The slice to copy. * @return A newly allocated string containing the slice's text. */ function toString(slice memory self) internal pure returns (string memory) { string memory ret = new string(self._len); uint retptr; assembly { retptr := add(ret, 32) } memcpy(retptr, self._ptr, self._len); return ret; } /* * @dev Returns the length in runes of the slice. Note that this operation * takes time proportional to the length of the slice; avoid using it * in loops, and call `slice.empty()` if you only need to know whether * the slice is empty or not. * @param self The slice to operate on. * @return The length of the slice in runes. */ function len(slice memory self) internal pure returns (uint l) { // Starting at ptr-31 means the LSB will be the byte we care about uint ptr = self._ptr - 31; uint end = ptr + self._len; for (l = 0; ptr < end; l++) { uint8 b; assembly { b := and(mload(ptr), 0xFF) } if (b < 0x80) { ptr += 1; } else if(b < 0xE0) { ptr += 2; } else if(b < 0xF0) { ptr += 3; } else if(b < 0xF8) { ptr += 4; } else if(b < 0xFC) { ptr += 5; } else { ptr += 6; } } } /* * @dev Returns true if the slice is empty (has a length of 0). * @param self The slice to operate on. * @return True if the slice is empty, False otherwise. */ function empty(slice memory self) internal pure returns (bool) { return self._len == 0; } /* * @dev Returns a negative number if `other` comes lexicographically after * `self`, a positive number if it comes before, or zero if the * contents of the two slices are equal. Comparison is done per-rune, * on unicode codepoints. * @param self The first slice to compare. * @param other The second slice to compare. * @return The result of the comparison. */ function compare(slice memory self, slice memory other) internal pure returns (int) { uint shortest = self._len; if (other._len < self._len) shortest = other._len; uint selfptr = self._ptr; uint otherptr = other._ptr; for (uint idx = 0; idx < shortest; idx += 32) { uint a; uint b; assembly { a := mload(selfptr) b := mload(otherptr) } if (a != b) { // Mask out irrelevant bytes and check again uint256 mask = uint256(-1); // 0xffff... if(shortest < 32) { mask = ~(2 ** (8 * (32 - shortest + idx)) - 1); } uint256 diff = (a & mask) - (b & mask); if (diff != 0) return int(diff); } selfptr += 32; otherptr += 32; } return int(self._len) - int(other._len); } /* * @dev Returns true if the two slices contain the same text. * @param self The first slice to compare. * @param self The second slice to compare. * @return True if the slices are equal, false otherwise. */ function equals(slice memory self, slice memory other) internal pure returns (bool) { return compare(self, other) == 0; } /* * @dev Extracts the first rune in the slice into `rune`, advancing the * slice to point to the next rune and returning `self`. * @param self The slice to operate on. * @param rune The slice that will contain the first rune. * @return `rune`. */ function nextRune(slice memory self, slice memory rune) internal pure returns (slice memory) { rune._ptr = self._ptr; if (self._len == 0) { rune._len = 0; return rune; } uint l; uint b; // Load the first byte of the rune into the LSBs of b assembly { b := and(mload(sub(mload(add(self, 32)), 31)), 0xFF) } if (b < 0x80) { l = 1; } else if(b < 0xE0) { l = 2; } else if(b < 0xF0) { l = 3; } else { l = 4; } // Check for truncated codepoints if (l > self._len) { rune._len = self._len; self._ptr += self._len; self._len = 0; return rune; } self._ptr += l; self._len -= l; rune._len = l; return rune; } /* * @dev Returns the first rune in the slice, advancing the slice to point * to the next rune. * @param self The slice to operate on. * @return A slice containing only the first rune from `self`. */ function nextRune(slice memory self) internal pure returns (slice memory ret) { nextRune(self, ret); } /* * @dev Returns the number of the first codepoint in the slice. * @param self The slice to operate on. * @return The number of the first codepoint in the slice. */ function ord(slice memory self) internal pure returns (uint ret) { if (self._len == 0) { return 0; } uint word; uint length; uint divisor = 2 ** 248; // Load the rune into the MSBs of b assembly { word:= mload(mload(add(self, 32))) } uint b = word / divisor; if (b < 0x80) { ret = b; length = 1; } else if(b < 0xE0) { ret = b & 0x1F; length = 2; } else if(b < 0xF0) { ret = b & 0x0F; length = 3; } else { ret = b & 0x07; length = 4; } // Check for truncated codepoints if (length > self._len) { return 0; } for (uint i = 1; i < length; i++) { divisor = divisor / 256; b = (word / divisor) & 0xFF; if (b & 0xC0 != 0x80) { // Invalid UTF-8 sequence return 0; } ret = (ret * 64) | (b & 0x3F); } return ret; } /* * @dev Returns the keccak-256 hash of the slice. * @param self The slice to hash. * @return The hash of the slice. */ function keccak(slice memory self) internal pure returns (bytes32 ret) { assembly { ret := keccak256(mload(add(self, 32)), mload(self)) } } /* * @dev Returns true if `self` starts with `needle`. * @param self The slice to operate on. * @param needle The slice to search for. * @return True if the slice starts with the provided text, false otherwise. */ function startsWith(slice memory self, slice memory needle) internal pure returns (bool) { if (self._len < needle._len) { return false; } if (self._ptr == needle._ptr) { return true; } bool equal; assembly { let length := mload(needle) let selfptr := mload(add(self, 0x20)) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } return equal; } /* * @dev If `self` starts with `needle`, `needle` is removed from the * beginning of `self`. Otherwise, `self` is unmodified. * @param self The slice to operate on. * @param needle The slice to search for. * @return `self` */ function beyond(slice memory self, slice memory needle) internal pure returns (slice memory) { if (self._len < needle._len) { return self; } bool equal = true; if (self._ptr != needle._ptr) { assembly { let length := mload(needle) let selfptr := mload(add(self, 0x20)) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } } if (equal) { self._len -= needle._len; self._ptr += needle._len; } return self; } /* * @dev Returns true if the slice ends with `needle`. * @param self The slice to operate on. * @param needle The slice to search for. * @return True if the slice starts with the provided text, false otherwise. */ function endsWith(slice memory self, slice memory needle) internal pure returns (bool) { if (self._len < needle._len) { return false; } uint selfptr = self._ptr + self._len - needle._len; if (selfptr == needle._ptr) { return true; } bool equal; assembly { let length := mload(needle) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } return equal; } /* * @dev If `self` ends with `needle`, `needle` is removed from the * end of `self`. Otherwise, `self` is unmodified. * @param self The slice to operate on. * @param needle The slice to search for. * @return `self` */ function until(slice memory self, slice memory needle) internal pure returns (slice memory) { if (self._len < needle._len) { return self; } uint selfptr = self._ptr + self._len - needle._len; bool equal = true; if (selfptr != needle._ptr) { assembly { let length := mload(needle) let needleptr := mload(add(needle, 0x20)) equal := eq(keccak256(selfptr, length), keccak256(needleptr, length)) } } if (equal) { self._len -= needle._len; } return self; } // Returns the memory address of the first byte of the first occurrence of // `needle` in `self`, or the first byte after `self` if not found. function findPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) { uint ptr = selfptr; uint idx; if (needlelen <= selflen) { if (needlelen <= 32) { bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1)); bytes32 needledata; assembly { needledata := and(mload(needleptr), mask) } uint end = selfptr + selflen - needlelen; bytes32 ptrdata; assembly { ptrdata := and(mload(ptr), mask) } while (ptrdata != needledata) { if (ptr >= end) return selfptr + selflen; ptr++; assembly { ptrdata := and(mload(ptr), mask) } } return ptr; } else { // For long needles, use hashing bytes32 hash; assembly { hash := keccak256(needleptr, needlelen) } for (idx = 0; idx <= selflen - needlelen; idx++) { bytes32 testHash; assembly { testHash := keccak256(ptr, needlelen) } if (hash == testHash) return ptr; ptr += 1; } } } return selfptr + selflen; } // Returns the memory address of the first byte after the last occurrence of // `needle` in `self`, or the address of `self` if not found. function rfindPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private pure returns (uint) { uint ptr; if (needlelen <= selflen) { if (needlelen <= 32) { bytes32 mask = bytes32(~(2 ** (8 * (32 - needlelen)) - 1)); bytes32 needledata; assembly { needledata := and(mload(needleptr), mask) } ptr = selfptr + selflen - needlelen; bytes32 ptrdata; assembly { ptrdata := and(mload(ptr), mask) } while (ptrdata != needledata) { if (ptr <= selfptr) return selfptr; ptr--; assembly { ptrdata := and(mload(ptr), mask) } } return ptr + needlelen; } else { // For long needles, use hashing bytes32 hash; assembly { hash := keccak256(needleptr, needlelen) } ptr = selfptr + (selflen - needlelen); while (ptr >= selfptr) { bytes32 testHash; assembly { testHash := keccak256(ptr, needlelen) } if (hash == testHash) return ptr + needlelen; ptr -= 1; } } } return selfptr; } /* * @dev Modifies `self` to contain everything from the first occurrence of * `needle` to the end of the slice. `self` is set to the empty slice * if `needle` is not found. * @param self The slice to search and modify. * @param needle The text to search for. * @return `self`. */ function find(slice memory self, slice memory needle) internal pure returns (slice memory) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr); self._len -= ptr - self._ptr; self._ptr = ptr; return self; } /* * @dev Modifies `self` to contain the part of the string from the start of * `self` to the end of the first occurrence of `needle`. If `needle` * is not found, `self` is set to the empty slice. * @param self The slice to search and modify. * @param needle The text to search for. * @return `self`. */ function rfind(slice memory self, slice memory needle) internal pure returns (slice memory) { uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr); self._len = ptr - self._ptr; return self; } /* * @dev Splits the slice, setting `self` to everything after the first * occurrence of `needle`, and `token` to everything before it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and `token` is set to the entirety of `self`. * @param self The slice to split. * @param needle The text to search for in `self`. * @param token An output parameter to which the first token is written. * @return `token`. */ function split(slice memory self, slice memory needle, slice memory token) internal pure returns (slice memory) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr); token._ptr = self._ptr; token._len = ptr - self._ptr; if (ptr == self._ptr + self._len) { // Not found self._len = 0; } else { self._len -= token._len + needle._len; self._ptr = ptr + needle._len; } return token; } /* * @dev Splits the slice, setting `self` to everything after the first * occurrence of `needle`, and returning everything before it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and the entirety of `self` is returned. * @param self The slice to split. * @param needle The text to search for in `self`. * @return The part of `self` up to the first occurrence of `delim`. */ function split(slice memory self, slice memory needle) internal pure returns (slice memory token) { split(self, needle, token); } /* * @dev Splits the slice, setting `self` to everything before the last * occurrence of `needle`, and `token` to everything after it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and `token` is set to the entirety of `self`. * @param self The slice to split. * @param needle The text to search for in `self`. * @param token An output parameter to which the first token is written. * @return `token`. */ function rsplit(slice memory self, slice memory needle, slice memory token) internal pure returns (slice memory) { uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr); token._ptr = ptr; token._len = self._len - (ptr - self._ptr); if (ptr == self._ptr) { // Not found self._len = 0; } else { self._len -= token._len + needle._len; } return token; } /* * @dev Splits the slice, setting `self` to everything before the last * occurrence of `needle`, and returning everything after it. If * `needle` does not occur in `self`, `self` is set to the empty slice, * and the entirety of `self` is returned. * @param self The slice to split. * @param needle The text to search for in `self`. * @return The part of `self` after the last occurrence of `delim`. */ function rsplit(slice memory self, slice memory needle) internal pure returns (slice memory token) { rsplit(self, needle, token); } /* * @dev Counts the number of nonoverlapping occurrences of `needle` in `self`. * @param self The slice to search. * @param needle The text to search for in `self`. * @return The number of occurrences of `needle` found in `self`. */ function count(slice memory self, slice memory needle) internal pure returns (uint cnt) { uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr) + needle._len; while (ptr <= self._ptr + self._len) { cnt++; ptr = findPtr(self._len - (ptr - self._ptr), ptr, needle._len, needle._ptr) + needle._len; } } /* * @dev Returns True if `self` contains `needle`. * @param self The slice to search. * @param needle The text to search for in `self`. * @return True if `needle` is found in `self`, false otherwise. */ function contains(slice memory self, slice memory needle) internal pure returns (bool) { return rfindPtr(self._len, self._ptr, needle._len, needle._ptr) != self._ptr; } /* * @dev Returns a newly allocated string containing the concatenation of * `self` and `other`. * @param self The first slice to concatenate. * @param other The second slice to concatenate. * @return The concatenation of the two strings. */ function concat(slice memory self, slice memory other) internal pure returns (string memory) { string memory ret = new string(self._len + other._len); uint retptr; assembly { retptr := add(ret, 32) } memcpy(retptr, self._ptr, self._len); memcpy(retptr + self._len, other._ptr, other._len); return ret; } /* * @dev Joins an array of slices, using `self` as a delimiter, returning a * newly allocated string. * @param self The delimiter to use. * @param parts A list of slices to join. * @return A newly allocated string containing all the slices in `parts`, * joined with `self`. */ function join(slice memory self, slice[] memory parts) internal pure returns (string memory) { if (parts.length == 0) return ""; uint length = self._len * (parts.length - 1); for(uint i = 0; i < parts.length; i++) length += parts[i]._len; string memory ret = new string(length); uint retptr; assembly { retptr := add(ret, 32) } for(uint i = 0; i < parts.length; i++) { memcpy(retptr, parts[i]._ptr, parts[i]._len); retptr += parts[i]._len; if (i < parts.length - 1) { memcpy(retptr, self._ptr, self._len); retptr += self._len; } } return ret; } }
pragma solidity ^0.7.6;
pragma abicoder v2;
import "./PriceOracle.sol";
import "./ErrorReporter.sol";
import "./PTokenInterfaces.sol";
import "./SafeMath.sol";
import "./UniswapPriceOracleStorage.sol";
import "./EIP20Interface.sol";
import "./Controller.sol";
import "./PTokenFactory.sol";
contract UniswapPriceOracle is UniswapPriceOracleStorageV1, PriceOracle, OracleErrorReporter {
using FixedPoint for *;
using SafeMath for uint;
event PoolAdded(uint id, address poolFactory);
event PoolRemoved(uint id, address poolFactory);
event PoolUpdated(uint id, address poolFactory);
event StableCoinAdded(uint id, address coin);
event StableCoinRemoved(uint id, address coin);
event StableCoinUpdated(uint id, address coin);
event AssetPairUpdated(address asset, address pair);
constructor() {}
function initialize(
address poolFactory_,
address WETHToken_,
address ETHUSDPriceFeed_
)
public
{
require(
WETHToken == address(0) &&
ETHUSDPriceFeed == address(0)
, "Oracle: may only be initialized once"
);
WETHToken = WETHToken_;
ETHUSDPriceFeed = ETHUSDPriceFeed_;
require(
poolFactory_ != address(0)
, 'Oracle: invalid address for factory'
);
poolFactories.push(poolFactory_);
emit PoolAdded(0, poolFactory_);
}
function updateUnderlyingPrice(address pToken) public override returns (uint) {
if (pToken == Registry(registry).pETH()) {
return uint(Error.NO_ERROR);
}
address asset = PErc20Interface(pToken).underlying();
return update(asset);
}
// Get the most recent price for a asset in USD with 18 decimals of precision.
function getPriceInUSD(address asset) public view virtual returns (uint) {
uint ETHUSDPrice = uint(AggregatorInterface(ETHUSDPriceFeed).latestAnswer());
uint AssetETHCourse = getCourseInETH(asset);
// div 1e8 is chainlink precision for ETH
return ETHUSDPrice.mul(AssetETHCourse).div(1e8);
}
function getCourseInETH(address asset) public view returns (uint) {
if (asset == Registry(registry).pETH()) {
// ether always worth 1
return 1e18;
}
return averagePrices[asset];
}
function update(address asset) public returns (uint) {
uint112 reserve0;
uint112 reserve1;
uint32 blockTimeStamp;
address pair;
if (isNewAsset(asset)) {
if (assetPair[asset] == address(0)) {
// first update from factory or other users
(pair, ) = searchPair(asset);
} else {
// after updatePair function
pair = assetPair[asset];
}
if (pair != address(0)) {
assetPair[asset] = pair;
(reserve0, reserve1, blockTimeStamp) = getReservesFromPair(asset);
if (reserve1 < minReserveLiquidity) {
return fail(Error.UPDATE_PRICE, FailureInfo.NO_RESERVES);
}
cumulativePrices[pair][asset].priceAverage = FixedPoint.uq112x112(uqdiv(encode(reserve1), reserve0));
} else {
return fail(Error.UPDATE_PRICE, FailureInfo.NO_PAIR);
}
} else {
// second and next updates
(, , blockTimeStamp) = getReservesFromPair(asset);
if (reserve1 < minReserveLiquidity) {
cumulativePrices[assetPair[asset]][asset].priceAverage._x = 0;
cumulativePrices[assetPair[asset]][asset].priceCumulativePrevious = 0;
cumulativePrices[assetPair[asset]][asset].blockTimeStampPrevious = 0;
return fail(Error.UPDATE_PRICE, FailureInfo.NO_RESERVES);
}
if (!isPeriodElapsed(asset)) {
return fail(Error.UPDATE_PRICE, FailureInfo.PERIOD_NOT_ELAPSED);
}
pair = assetPair[asset];
uint32 timeElapsed = blockTimeStamp - cumulativePrices[pair][asset].blockTimeStampPrevious;
// overflow is desired, casting never truncates
// cumulative price is in (uq112x112 price * seconds) units so we simply wrap it after division by time elapsed
if (asset == IUniswapV2Pair(pair).token0()) {
cumulativePrices[pair][asset].priceAverage = FixedPoint.uq112x112(uint224((IUniswapV2Pair(pair).price0CumulativeLast() - cumulativePrices[pair][asset].priceCumulativePrevious) / timeElapsed));
} else {
cumulativePrices[pair][asset].priceAverage = FixedPoint.uq112x112(uint224((IUniswapV2Pair(pair).price1CumulativeLast() - cumulativePrices[pair][asset].priceCumulativePrevious) / timeElapsed));
}
}
cumulativePrices[pair][asset].blockTimeStampPrevious = blockTimeStamp;
// update data
if (asset == IUniswapV2Pair(pair).token0()) {
cumulativePrices[pair][asset].priceCumulativePrevious = IUniswapV2Pair(pair).price0CumulativeLast();
} else {
cumulativePrices[pair][asset].priceCumulativePrevious = IUniswapV2Pair(pair).price1CumulativeLast();
}
averagePrices[asset] = calcCourseInETH(asset);
emit PriceUpdated(asset, getCourseInETH(asset));
return uint(Error.NO_ERROR);
}
function checkAndUpdateAllNewAssets() public {
PTokenFactory factory = PTokenFactory(Registry(registry).factory());
Controller controller = Controller(factory.controller());
address[] memory allMarkets = Controller(controller).getAllMarkets();
updateNewAssets(allMarkets);
}
function updateNewAssets(address[] memory pTokens) public {
address asset;
for(uint i = 0; i < pTokens.length; i++) {
if (pTokens[i] == Registry(registry).pETH()) {
continue;
}
asset = PErc20Interface(pTokens[i]).underlying();
if (isNewAsset(asset)) {
update(asset);
}
}
}
function getUnderlyingPrice(address pToken) public view override virtual returns (uint) {
if (pToken == Registry(registry).pETH()) {
return getPriceInUSD(Registry(registry).pETH());
}
address asset = PErc20Interface(pToken).underlying();
uint price = getPriceInUSD(asset);
uint decimals = EIP20Interface(asset).decimals();
return price.mul(10 ** (36 - decimals)).div(1e18);
}
function isNewAsset(address asset) public view returns (bool) {
return bool(cumulativePrices[assetPair[asset]][asset].blockTimeStampPrevious == 0);
}
function getPoolPair(address asset, uint poolId) public view returns (address) {
IUniswapV2Factory factory = IUniswapV2Factory(poolFactories[poolId]);
return factory.getPair(WETHToken, asset);
}
function getPoolPairWithStableCoin(address asset, uint poolId, uint stableCoinId) public view returns (address) {
IUniswapV2Factory factory = IUniswapV2Factory(poolFactories[poolId]);
return factory.getPair(stableCoins[stableCoinId], asset);
}
function getReservesFromPair(address asset) public view returns (uint112, uint112, uint32) {
uint112 assetReserve;
uint112 ethOrCoinReserves;
uint32 blockTimeStamp;
IUniswapV2Pair pair = IUniswapV2Pair(assetPair[asset]);
address token0 = pair.token0();
if (token0 == asset) {
(assetReserve, ethOrCoinReserves, blockTimeStamp) = pair.getReserves();
} else {
(ethOrCoinReserves, assetReserve, blockTimeStamp) = pair.getReserves();
}
return (assetReserve, ethOrCoinReserves, blockTimeStamp);
}
function isPeriodElapsed(address asset) public view returns (bool) {
IUniswapV2Pair pair = IUniswapV2Pair(assetPair[asset]);
( , , uint32 blockTimeStamp) = pair.getReserves();
uint timeElapsed = uint(blockTimeStamp).sub(uint(cumulativePrices[assetPair[asset]][asset].blockTimeStampPrevious));
return bool(timeElapsed > period);
}
function calcCourseInETH(address asset) public view returns (uint) {
if (asset == Registry(registry).pETH()) {
// ether always worth 1
return 1e18;
}
uint power = EIP20Interface(asset).decimals();
uint amountIn = 10**power;
return getETHAmount(asset, amountIn);
}
function getETHAmount(address asset, uint amountIn) public view returns (uint) {
address pair = assetPair[asset];
address token0 = IUniswapV2Pair(pair).token0();
address token1 = IUniswapV2Pair(pair).token1();
uint power;
uint result = cumulativePrices[pair][asset].priceAverage.mul(amountIn).decode144();
if (token0 == WETHToken || token1 == WETHToken) {
// asset and weth pool
return result;
} else {
// asset and stable coin pool
if (token0 == asset) {
power = EIP20Interface(token1).decimals();
return result.mul(getCourseInETH(token1)).div(10**power);
} else {
power = EIP20Interface(token0).decimals();
return result.mul(getCourseInETH(token0)).div(10**power);
}
}
}
function searchPair(address asset) public view returns (address, uint112) {
address pair;
uint112 maxReserves;
IUniswapV2Pair tempPair;
uint112 ETHReserves;
for (uint i = 0; i < poolFactories.length; i++) {
tempPair = IUniswapV2Pair(getPoolPair(asset, i));
if (address(tempPair) != address(0)) {
if (tempPair.token0() == asset) {
(, ETHReserves, ) = tempPair.getReserves();
} else {
(ETHReserves, , ) = tempPair.getReserves();
}
if (ETHReserves > maxReserves) {
maxReserves = ETHReserves;
pair = address(tempPair);
}
}
for (uint j = 0; j < stableCoins.length; j++) {
tempPair = IUniswapV2Pair(getPoolPairWithStableCoin(asset, i, j));
if (address(tempPair) != address(0)) {
uint112 stableCoinReserve;
uint power;
address token0 = tempPair.token0();
address token1 = tempPair.token1();
if (token0 == asset) {
(, stableCoinReserve,) = tempPair.getReserves();
power = EIP20Interface(token1).decimals();
ETHReserves = uint112(getCourseInETH(token1) * stableCoinReserve / (10**power));
} else {
(stableCoinReserve, , ) = tempPair.getReserves();
power = EIP20Interface(token0).decimals();
ETHReserves = uint112(getCourseInETH(token0) * stableCoinReserve / (10**power));
}
if (ETHReserves > maxReserves) {
maxReserves = ETHReserves;
pair = address(tempPair);
}
}
}
}
return (pair, maxReserves);
}
function _setNewAddresses(address WETHToken_, address ETHUSDPriceFeed_) external returns (uint) {
// Check caller = admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.UPDATE_DATA);
}
WETHToken = WETHToken_;
ETHUSDPriceFeed = ETHUSDPriceFeed_;
return uint(Error.NO_ERROR);
}
function _setMinReserveLiquidity(uint minReserveLiquidity_) public returns (uint) {
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.UPDATE_DATA);
}
minReserveLiquidity = minReserveLiquidity_;
return uint(Error.NO_ERROR);
}
function _setPeriod(uint period_) public returns (uint) {
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.UPDATE_DATA);
}
period = period_;
return uint(Error.NO_ERROR);
}
function _addPool(address poolFactory_) public returns (uint) {
// Check caller = admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADD_POOL_OR_COIN);
}
require(
poolFactory_ != address(0)
, 'Oracle: invalid address for factory'
);
for (uint i = 0; i < poolFactories.length; i++) {
if (poolFactories[i] == poolFactory_) {
return fail(Error.POOL_OR_COIN_EXIST, FailureInfo.ADD_POOL_OR_COIN);
}
}
poolFactories.push(poolFactory_);
uint poolId = poolFactories.length - 1;
emit PoolAdded(poolId, poolFactory_);
return uint(Error.NO_ERROR);
}
function _removePool(uint poolId) public returns (uint) {
// Check caller = admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.UPDATE_DATA);
}
require(
poolFactories.length > 1
, 'Oracle: must have one pool'
);
uint lastId = poolFactories.length - 1;
address factory = poolFactories[lastId];
poolFactories.pop();
emit PoolRemoved(lastId, factory);
if (lastId != poolId) {
poolFactories[poolId] = factory;
emit PoolUpdated(poolId, factory);
}
return uint(Error.NO_ERROR);
}
function _updatePool(uint poolId, address poolFactory_) public returns (uint) {
// Check caller = admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.UPDATE_DATA);
}
require(
poolFactory_ != address(0)
, 'Oracle: invalid address for factory'
);
for (uint i = 0; i < poolFactories.length; i++) {
if (poolFactories[i] == poolFactory_) {
return fail(Error.POOL_OR_COIN_EXIST, FailureInfo.UPDATE_DATA);
}
}
poolFactories[poolId] = poolFactory_;
emit PoolUpdated(poolId, poolFactory_);
return uint(Error.NO_ERROR);
}
function _addStableCoin(address stableCoin_) public returns (uint) {
// Check caller = admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADD_POOL_OR_COIN);
}
require(
stableCoin_ != address(0)
, 'Oracle: invalid address for stable coin'
);
for (uint i = 0; i < stableCoins.length; i++) {
if (stableCoins[i] == stableCoin_) {
return fail(Error.POOL_OR_COIN_EXIST, FailureInfo.ADD_POOL_OR_COIN);
}
}
stableCoins.push(stableCoin_);
emit StableCoinAdded(stableCoins.length - 1, stableCoin_);
return uint(Error.NO_ERROR);
}
function _removeStableCoin(uint coinId) public returns (uint) {
// Check caller = admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.UPDATE_DATA);
}
require(
stableCoins.length > 0
, 'Oracle: stable coins are empty'
);
uint lastId = stableCoins.length - 1;
address stableCoin = stableCoins[lastId];
stableCoins.pop();
emit StableCoinRemoved(lastId, stableCoin);
if (lastId != coinId) {
stableCoins[coinId] = stableCoin;
emit StableCoinUpdated(coinId, stableCoin);
}
return uint(Error.NO_ERROR);
}
function _updateStableCoin(uint coinId, address stableCoin_) public returns (uint) {
// Check caller = admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.UPDATE_DATA);
}
require(
stableCoin_ != address(0)
, 'Oracle: invalid address for stable coin'
);
for (uint i = 0; i < stableCoins.length; i++) {
if (stableCoins[i] == stableCoin_) {
return fail(Error.POOL_OR_COIN_EXIST, FailureInfo.UPDATE_DATA);
}
}
stableCoins[coinId] = stableCoin_;
emit StableCoinUpdated(coinId, stableCoin_);
return uint(Error.NO_ERROR);
}
function _updateAssetPair(address asset, address pair) public returns (uint) {
// Check caller = admin
if (msg.sender != getMyAdmin()) {
return fail(Error.UNAUTHORIZED, FailureInfo.UPDATE_DATA);
}
require(
pair != address(0)
, 'Oracle: invalid address for pair'
);
cumulativePrices[assetPair[asset]][asset].priceAverage._x = 0;
cumulativePrices[assetPair[asset]][asset].priceCumulativePrevious = 0;
cumulativePrices[assetPair[asset]][asset].blockTimeStampPrevious = 0;
assetPair[asset] = pair;
emit AssetPairUpdated(asset, pair);
return update(asset);
}
function getAllPoolFactories() public view returns (address[] memory) {
return poolFactories;
}
function getAllStableCoins() public view returns (address[] memory) {
return stableCoins;
}
function getMyAdmin() public view returns (address) {
return Registry(registry).admin();
}
// encode a uint112 as a UQ112x112
function encode(uint112 y) internal view returns (uint224 z) {
z = uint224(y) * uint224(Q112); // never overflows
}
// divide a UQ112x112 by a uint112, returning a UQ112x112
function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
z = x / uint224(y);
}
}pragma solidity ^0.7.6;
pragma abicoder v2;
import './Registry.sol';
import "./IPriceFeeds.sol";
contract UniswapPriceOracleProxyStorage {
address public implementation;
address public registry;
uint public Q112 = 2**112;
uint public period = 10 minutes;
}
contract UniswapPriceOracleStorageV1 is UniswapPriceOracleProxyStorage {
uint public minReserveLiquidity;
address public WETHToken;
address public ETHUSDPriceFeed;
struct PoolCumulativePrice {
FixedPoint.uq112x112 priceAverage;
uint priceCumulativePrevious;
uint32 blockTimeStampPrevious;
}
// asset => assetPair => data from pool
mapping(address => mapping (address => PoolCumulativePrice)) public cumulativePrices;
mapping(address => uint) public averagePrices;
// asset => pair with reserves
mapping(address => address) public assetPair;
address[] public poolFactories;
address[] public stableCoins;
}pragma solidity ^0.7.6;
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":"contract RegistryInterface","name":"registry_","type":"address"},{"internalType":"uint256","name":"minUniswapLiquidity_","type":"uint256"},{"internalType":"address","name":"oracle_","type":"address"},{"internalType":"address","name":"_controller","type":"address"},{"internalType":"address","name":"_interestRateModel","type":"address"},{"internalType":"uint256","name":"_initialExchangeRateMantissa","type":"uint256"},{"internalType":"uint256","name":"_initialReserveFactorMantissa","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"error","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"info","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"detail","type":"uint256"}],"name":"Failure","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newPToken","type":"address"}],"name":"PTokenCreated","type":"event"},{"inputs":[{"internalType":"address","name":"asset","type":"address"}],"name":"checkPair","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"controller","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pETHImplementation_","type":"address"}],"name":"createPETH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"underlying_","type":"address"},{"internalType":"address","name":"pPIEImplementation_","type":"address"}],"name":"createPPIE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"underlying_","type":"address"}],"name":"createPToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAdmin","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"initialExchangeRateMantissa","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"initialReserveFactorMantissa","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"interestRateModel","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minUniswapLiquidity","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"oracle","outputs":[{"internalType":"contract UniswapPriceOracle","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"registry","outputs":[{"internalType":"contract RegistryInterface","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newController","type":"address"}],"name":"setController","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_initialExchangeRateMantissa","type":"uint256"}],"name":"setInitialExchangeRateMantissa","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_initialReserveFactorMantissa","type":"uint256"}],"name":"setInitialReserveFactorMantissa","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newInterestRateModel","type":"address"}],"name":"setInterestRateModel","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"minUniswapLiquidity_","type":"uint256"}],"name":"setMinUniswapLiquidity","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"oracle_","type":"address"}],"name":"setOracle","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_decimals","type":"uint256"}],"name":"setPTokenDecimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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5d8a0000
Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000c5b3cfcc8ad60565997caeed1cce6cc915a08b900000000000000000000000000000000000000000000000000de0b6b3a7640000000000000000000000000000155ae77115de61ae5755abd2c12cfd020eb9d37e000000000000000000000000d204be259f703503ef2ea03eb401ce6e07254d960000000000000000000000002cad4031c013fa66e1f2f15baa135f1b2e45208e00000000000000000000000000000000000000000000000000470de4df820000000000000000000000000000000000000000000000000000016345785d8a0000
-----Decoded View---------------
Arg [0] : registry_ (address): 0xc5b3cfcc8ad60565997caeed1cce6cc915a08b90
Arg [1] : minUniswapLiquidity_ (uint256): 1000000000000000000
Arg [2] : oracle_ (address): 0x155ae77115de61ae5755abd2c12cfd020eb9d37e
Arg [3] : _controller (address): 0xd204be259f703503ef2ea03eb401ce6e07254d96
Arg [4] : _interestRateModel (address): 0x2cad4031c013fa66e1f2f15baa135f1b2e45208e
Arg [5] : _initialExchangeRateMantissa (uint256): 20000000000000000
Arg [6] : _initialReserveFactorMantissa (uint256): 100000000000000000
-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000c5b3cfcc8ad60565997caeed1cce6cc915a08b90
Arg [1] : 0000000000000000000000000000000000000000000000000de0b6b3a7640000
Arg [2] : 000000000000000000000000155ae77115de61ae5755abd2c12cfd020eb9d37e
Arg [3] : 000000000000000000000000d204be259f703503ef2ea03eb401ce6e07254d96
Arg [4] : 0000000000000000000000002cad4031c013fa66e1f2f15baa135f1b2e45208e
Arg [5] : 00000000000000000000000000000000000000000000000000470de4df820000
Arg [6] : 000000000000000000000000000000000000000000000000016345785d8a0000
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.