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| // SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity ^0.8.0;
import "./BaseModule.sol";
import "./BaseIRM.sol";
import "./Interfaces.sol";
import "./Utils.sol";
import "./vendor/RPow.sol";
import "./IRiskManager.sol";
abstract contract BaseLogic is BaseModule {
constructor(uint moduleId_, bytes32 moduleGitCommit_) BaseModule(moduleId_, moduleGitCommit_) {}
// Account auth
function getSubAccount(address primary, uint subAccountId) internal pure returns (address) {
require(subAccountId < 256, "e/sub-account-id-too-big");
return address(uint160(primary) ^ uint160(subAccountId));
}
function isSubAccountOf(address primary, address subAccount) internal pure returns (bool) {
return (uint160(primary) | 0xFF) == (uint160(subAccount) | 0xFF);
}
// Entered markets array
function getEnteredMarketsArray(address account) internal view returns (address[] memory) {
uint32 numMarketsEntered = accountLookup[account].numMarketsEntered;
address firstMarketEntered = accountLookup[account].firstMarketEntered;
address[] memory output = new address[](numMarketsEntered);
if (numMarketsEntered == 0) return output;
address[MAX_POSSIBLE_ENTERED_MARKETS] storage markets = marketsEntered[account];
output[0] = firstMarketEntered;
for (uint i = 1; i < numMarketsEntered; ++i) {
output[i] = markets[i];
}
return output;
}
function isEnteredInMarket(address account, address underlying) internal view returns (bool) {
uint32 numMarketsEntered = accountLookup[account].numMarketsEntered;
address firstMarketEntered = accountLookup[account].firstMarketEntered;
Iif (numMarketsEntered == 0) return false;
if (firstMarketEntered == underlying) return true;
address[MAX_POSSIBLE_ENTERED_MARKETS] storage markets = marketsEntered[account];
for (uint i = 1; i < numMarketsEntered; ++i) {
if (markets[i] == underlying) return true;
}
return false;
}
function doEnterMarket(address account, address underlying) internal {
AccountStorage storage accountStorage = accountLookup[account];
uint32 numMarketsEntered = accountStorage.numMarketsEntered;
address[MAX_POSSIBLE_ENTERED_MARKETS] storage markets = marketsEntered[account];
if (numMarketsEntered != 0) {
if (accountStorage.firstMarketEntered == underlying) return; // already entered
for (uint i = 1; i < numMarketsEntered; i++) {
if (markets[i] == underlying) return; // already entered
}
}
require(numMarketsEntered < MAX_ENTERED_MARKETS, "e/too-many-entered-markets");
if (numMarketsEntered == 0) accountStorage.firstMarketEntered = underlying;
else markets[numMarketsEntered] = underlying;
accountStorage.numMarketsEntered = numMarketsEntered + 1;
emit EnterMarket(underlying, account);
}
// Liquidity check must be done by caller after calling this
function doExitMarket(address account, address underlying) internal {
AccountStorage storage accountStorage = accountLookup[account];
uint32 numMarketsEntered = accountStorage.numMarketsEntered;
address[MAX_POSSIBLE_ENTERED_MARKETS] storage markets = marketsEntered[account];
uint searchIndex = type(uint).max;
if (numMarketsEntered == 0) return; // already exited
if (accountStorage.firstMarketEntered == underlying) {
searchIndex = 0;
} else {
for (uint i = 1; i < numMarketsEntered; i++) {
if (markets[i] == underlying) {
searchIndex = i;
break;
}
}
if (searchIndex == type(uint).max) return; // already exited
}
uint lastMarketIndex = numMarketsEntered - 1;
if (searchIndex != lastMarketIndex) {
if (searchIndex == 0) accountStorage.firstMarketEntered = markets[lastMarketIndex];
else markets[searchIndex] = markets[lastMarketIndex];
}
accountStorage.numMarketsEntered = uint32(lastMarketIndex);
if (lastMarketIndex != 0) markets[lastMarketIndex] = address(0); // zero out for storage refund
emit ExitMarket(underlying, account);
}
// AssetConfig
function resolveAssetConfig(address underlying) internal view returns (AssetConfig memory) {
AssetConfig memory config = underlyingLookup[underlying];
require(config.eTokenAddress != address(0), "e/market-not-activated");
if (config.borrowFactor == type(uint32).max) config.borrowFactor = DEFAULT_BORROW_FACTOR;
if (config.twapWindow == type(uint24).max) config.twapWindow = DEFAULT_TWAP_WINDOW_SECONDS;
return config;
}
// AssetCache
struct AssetCache {
address underlying;
uint112 totalBalances;
uint144 totalBorrows;
uint96 reserveBalance;
uint interestAccumulator;
uint40 lastInterestAccumulatorUpdate;
uint8 underlyingDecimals;
uint32 interestRateModel;
int96 interestRate;
uint32 reserveFee;
uint16 pricingType;
uint32 pricingParameters;
uint poolSize; // result of calling balanceOf on underlying (in external units)
uint underlyingDecimalsScaler;
uint maxExternalAmount;
}
function initAssetCache(address underlying, AssetStorage storage assetStorage, AssetCache memory assetCache) internal view returns (bool dirty) {
dirty = false;
assetCache.underlying = underlying;
// Storage loads
assetCache.lastInterestAccumulatorUpdate = assetStorage.lastInterestAccumulatorUpdate;
uint8 underlyingDecimals = assetCache.underlyingDecimals = assetStorage.underlyingDecimals;
assetCache.interestRateModel = assetStorage.interestRateModel;
assetCache.interestRate = assetStorage.interestRate;
assetCache.reserveFee = assetStorage.reserveFee;
assetCache.pricingType = assetStorage.pricingType;
assetCache.pricingParameters = assetStorage.pricingParameters;
assetCache.reserveBalance = assetStorage.reserveBalance;
assetCache.totalBalances = assetStorage.totalBalances;
assetCache.totalBorrows = assetStorage.totalBorrows;
assetCache.interestAccumulator = assetStorage.interestAccumulator;
// Derived state
unchecked {
assetCache.underlyingDecimalsScaler = 10**(18 - underlyingDecimals);
assetCache.maxExternalAmount = MAX_SANE_AMOUNT / assetCache.underlyingDecimalsScaler;
}
uint poolSize = callBalanceOf(assetCache, address(this));
if (poolSize <= assetCache.maxExternalAmount) {
unchecked { assetCache.poolSize = poolSize * assetCache.underlyingDecimalsScaler; }
} else {
assetCache.poolSize = 0;
}
// Update interest accumulator and reserves
if (block.timestamp != assetCache.lastInterestAccumulatorUpdate) {
dirty = true;
uint deltaT = block.timestamp - assetCache.lastInterestAccumulatorUpdate;
// Compute new values
uint newInterestAccumulator = (RPow.rpow(uint(int(assetCache.interestRate) + 1e27), deltaT, 1e27) * assetCache.interestAccumulator) / 1e27;
uint newTotalBorrows = assetCache.totalBorrows * newInterestAccumulator / assetCache.interestAccumulator;
uint newReserveBalance = assetCache.reserveBalance;
uint newTotalBalances = assetCache.totalBalances;
uint feeAmount = (newTotalBorrows - assetCache.totalBorrows)
* (assetCache.reserveFee == type(uint32).max ? DEFAULT_RESERVE_FEE : assetCache.reserveFee)
/ (RESERVE_FEE_SCALE * INTERNAL_DEBT_PRECISION);
if (feeAmount != 0) {
uint poolAssets = assetCache.poolSize + (newTotalBorrows / INTERNAL_DEBT_PRECISION);
newTotalBalances = poolAssets * newTotalBalances / (poolAssets - feeAmount);
newReserveBalance += newTotalBalances - assetCache.totalBalances;
}
// Store new values in assetCache, only if no overflows will occur
Eif (newTotalBalances <= MAX_SANE_AMOUNT && newTotalBorrows <= MAX_SANE_DEBT_AMOUNT) {
assetCache.totalBorrows = encodeDebtAmount(newTotalBorrows);
assetCache.interestAccumulator = newInterestAccumulator;
assetCache.lastInterestAccumulatorUpdate = uint40(block.timestamp);
if (newTotalBalances != assetCache.totalBalances) {
assetCache.reserveBalance = encodeSmallAmount(newReserveBalance);
assetCache.totalBalances = encodeAmount(newTotalBalances);
}
}
}
}
function loadAssetCache(address underlying, AssetStorage storage assetStorage) internal returns (AssetCache memory assetCache) {
if (initAssetCache(underlying, assetStorage, assetCache)) {
assetStorage.lastInterestAccumulatorUpdate = assetCache.lastInterestAccumulatorUpdate;
assetStorage.underlying = assetCache.underlying; // avoid an SLOAD of this slot
assetStorage.reserveBalance = assetCache.reserveBalance;
assetStorage.totalBalances = assetCache.totalBalances;
assetStorage.totalBorrows = assetCache.totalBorrows;
assetStorage.interestAccumulator = assetCache.interestAccumulator;
}
}
function loadAssetCacheRO(address underlying, AssetStorage storage assetStorage) internal view returns (AssetCache memory assetCache) {
initAssetCache(underlying, assetStorage, assetCache);
}
// Utils
function decodeExternalAmount(AssetCache memory assetCache, uint externalAmount) internal pure returns (uint scaledAmount) {
require(externalAmount <= assetCache.maxExternalAmount, "e/amount-too-large");
unchecked { scaledAmount = externalAmount * assetCache.underlyingDecimalsScaler; }
}
function encodeAmount(uint amount) internal pure returns (uint112) {
require(amount <= MAX_SANE_AMOUNT, "e/amount-too-large-to-encode");
return uint112(amount);
}
function encodeSmallAmount(uint amount) internal pure returns (uint96) {
require(amount <= MAX_SANE_SMALL_AMOUNT, "e/small-amount-too-large-to-encode");
return uint96(amount);
}
function encodeDebtAmount(uint amount) internal pure returns (uint144) {
Erequire(amount <= MAX_SANE_DEBT_AMOUNT, "e/debt-amount-too-large-to-encode");
return uint144(amount);
}
function computeExchangeRate(AssetCache memory assetCache) private pure returns (uint) {
if (assetCache.totalBalances == 0) return 1e18;
return (assetCache.poolSize + (assetCache.totalBorrows / INTERNAL_DEBT_PRECISION)) * 1e18 / assetCache.totalBalances;
}
function underlyingAmountToBalance(AssetCache memory assetCache, uint amount) internal pure returns (uint) {
uint exchangeRate = computeExchangeRate(assetCache);
return amount * 1e18 / exchangeRate;
}
function underlyingAmountToBalanceRoundUp(AssetCache memory assetCache, uint amount) internal pure returns (uint) {
uint exchangeRate = computeExchangeRate(assetCache);
return (amount * 1e18 + (exchangeRate - 1)) / exchangeRate;
}
function balanceToUnderlyingAmount(AssetCache memory assetCache, uint amount) internal pure returns (uint) {
uint exchangeRate = computeExchangeRate(assetCache);
return amount * exchangeRate / 1e18;
}
function callBalanceOf(AssetCache memory assetCache, address account) internal view FREEMEM returns (uint) {
// We set a gas limit so that a malicious token can't eat up all gas and cause a liquidity check to fail.
(bool success, bytes memory data) = assetCache.underlying.staticcall{gas: 20000}(abi.encodeWithSelector(IERC20.balanceOf.selector, account));
// If token's balanceOf() call fails for any reason, return 0. This prevents malicious tokens from causing liquidity checks to fail.
// If the contract doesn't exist (maybe because selfdestructed), then data.length will be 0 and we will return 0.
// Data length > 32 is allowed because some legitimate tokens append extra data that can be safely ignored.
if (!success || data.length < 32) return 0;
return abi.decode(data, (uint256));
}
function updateInterestRate(AssetStorage storage assetStorage, AssetCache memory assetCache) internal {
uint32 utilisation;
{
uint totalBorrows = assetCache.totalBorrows / INTERNAL_DEBT_PRECISION;
uint poolAssets = assetCache.poolSize + totalBorrows;
if (poolAssets == 0) utilisation = 0; // empty pool arbitrarily given utilisation of 0
else utilisation = uint32(totalBorrows * (uint(type(uint32).max) * 1e18) / poolAssets / 1e18);
}
bytes memory result = callInternalModule(assetCache.interestRateModel,
abi.encodeWithSelector(BaseIRM.computeInterestRate.selector, assetCache.underlying, utilisation));
(int96 newInterestRate) = abi.decode(result, (int96));
assetStorage.interestRate = assetCache.interestRate = newInterestRate;
}
function logAssetStatus(AssetCache memory a) internal {
emit AssetStatus(a.underlying, a.totalBalances, a.totalBorrows / INTERNAL_DEBT_PRECISION, a.reserveBalance, a.poolSize, a.interestAccumulator, a.interestRate, block.timestamp);
}
// Balances
function increaseBalance(AssetStorage storage assetStorage, AssetCache memory assetCache, address eTokenAddress, address account, uint amount) internal {
assetStorage.users[account].balance = encodeAmount(assetStorage.users[account].balance + amount);
assetStorage.totalBalances = assetCache.totalBalances = encodeAmount(uint(assetCache.totalBalances) + amount);
updateInterestRate(assetStorage, assetCache);
emit Deposit(assetCache.underlying, account, amount);
emitViaProxy_Transfer(eTokenAddress, address(0), account, amount);
}
function decreaseBalance(AssetStorage storage assetStorage, AssetCache memory assetCache, address eTokenAddress, address account, uint amount) internal {
uint origBalance = assetStorage.users[account].balance;
require(origBalance >= amount, "e/insufficient-balance");
assetStorage.users[account].balance = encodeAmount(origBalance - amount);
assetStorage.totalBalances = assetCache.totalBalances = encodeAmount(assetCache.totalBalances - amount);
updateInterestRate(assetStorage, assetCache);
emit Withdraw(assetCache.underlying, account, amount);
emitViaProxy_Transfer(eTokenAddress, account, address(0), amount);
}
function transferBalance(AssetStorage storage assetStorage, AssetCache memory assetCache, address eTokenAddress, address from, address to, uint amount) internal {
uint origFromBalance = assetStorage.users[from].balance;
require(origFromBalance >= amount, "e/insufficient-balance");
uint newFromBalance;
unchecked { newFromBalance = origFromBalance - amount; }
assetStorage.users[from].balance = encodeAmount(newFromBalance);
assetStorage.users[to].balance = encodeAmount(assetStorage.users[to].balance + amount);
emit Withdraw(assetCache.underlying, from, amount);
emit Deposit(assetCache.underlying, to, amount);
emitViaProxy_Transfer(eTokenAddress, from, to, amount);
}
function withdrawAmounts(AssetStorage storage assetStorage, AssetCache memory assetCache, address account, uint amount) internal view returns (uint, uint) {
uint amountInternal;
if (amount == type(uint).max) {
amountInternal = assetStorage.users[account].balance;
amount = balanceToUnderlyingAmount(assetCache, amountInternal);
} else {
amount = decodeExternalAmount(assetCache, amount);
amountInternal = underlyingAmountToBalanceRoundUp(assetCache, amount);
}
return (amount, amountInternal);
}
// Borrows
// Returns internal precision
function getCurrentOwedExact(AssetStorage storage assetStorage, AssetCache memory assetCache, address account, uint owed) internal view returns (uint) {
// Don't bother loading the user's accumulator
if (owed == 0) return 0;
// Can't divide by 0 here: If owed is non-zero, we must've initialised the user's interestAccumulator
return owed * assetCache.interestAccumulator / assetStorage.users[account].interestAccumulator;
}
// When non-zero, we round *up* to the smallest external unit so that outstanding dust in a loan can be repaid.
// unchecked is OK here since owed is always loaded from storage, so we know it fits into a uint144 (pre-interest accural)
// Takes and returns 27 decimals precision.
function roundUpOwed(AssetCache memory assetCache, uint owed) private pure returns (uint) {
if (owed == 0) return 0;
unchecked {
uint scale = INTERNAL_DEBT_PRECISION * assetCache.underlyingDecimalsScaler;
return (owed + scale - 1) / scale * scale;
}
}
// Returns 18-decimals precision (debt amount is rounded up)
function getCurrentOwed(AssetStorage storage assetStorage, AssetCache memory assetCache, address account) internal view returns (uint) {
return roundUpOwed(assetCache, getCurrentOwedExact(assetStorage, assetCache, account, assetStorage.users[account].owed)) / INTERNAL_DEBT_PRECISION;
}
function updateUserBorrow(AssetStorage storage assetStorage, AssetCache memory assetCache, address account) private returns (uint newOwedExact, uint prevOwedExact) {
prevOwedExact = assetStorage.users[account].owed;
newOwedExact = getCurrentOwedExact(assetStorage, assetCache, account, prevOwedExact);
assetStorage.users[account].owed = encodeDebtAmount(newOwedExact);
assetStorage.users[account].interestAccumulator = assetCache.interestAccumulator;
}
function logBorrowChange(AssetCache memory assetCache, address dTokenAddress, address account, uint prevOwed, uint owed) private {
prevOwed = roundUpOwed(assetCache, prevOwed) / INTERNAL_DEBT_PRECISION;
owed = roundUpOwed(assetCache, owed) / INTERNAL_DEBT_PRECISION;
if (owed > prevOwed) {
uint change = owed - prevOwed;
emit Borrow(assetCache.underlying, account, change);
emitViaProxy_Transfer(dTokenAddress, address(0), account, change / assetCache.underlyingDecimalsScaler);
} else if (prevOwed > owed) {
uint change = prevOwed - owed;
emit Repay(assetCache.underlying, account, change);
emitViaProxy_Transfer(dTokenAddress, account, address(0), change / assetCache.underlyingDecimalsScaler);
}
}
function increaseBorrow(AssetStorage storage assetStorage, AssetCache memory assetCache, address dTokenAddress, address account, uint amount) internal {
amount *= INTERNAL_DEBT_PRECISION;
require(assetCache.pricingType != PRICINGTYPE__FORWARDED || pTokenLookup[assetCache.underlying] == address(0), "e/borrow-not-supported");
(uint owed, uint prevOwed) = updateUserBorrow(assetStorage, assetCache, account);
if (owed == 0) doEnterMarket(account, assetCache.underlying);
owed += amount;
assetStorage.users[account].owed = encodeDebtAmount(owed);
assetStorage.totalBorrows = assetCache.totalBorrows = encodeDebtAmount(assetCache.totalBorrows + amount);
updateInterestRate(assetStorage, assetCache);
logBorrowChange(assetCache, dTokenAddress, account, prevOwed, owed);
}
function decreaseBorrow(AssetStorage storage assetStorage, AssetCache memory assetCache, address dTokenAddress, address account, uint origAmount) internal {
uint amount = origAmount * INTERNAL_DEBT_PRECISION;
(uint owed, uint prevOwed) = updateUserBorrow(assetStorage, assetCache, account);
uint owedRoundedUp = roundUpOwed(assetCache, owed);
require(amount <= owedRoundedUp, "e/repay-too-much");
uint owedRemaining;
unchecked { owedRemaining = owedRoundedUp - amount; }
Iif (owed > assetCache.totalBorrows) owed = assetCache.totalBorrows;
assetStorage.users[account].owed = encodeDebtAmount(owedRemaining);
assetStorage.totalBorrows = assetCache.totalBorrows = encodeDebtAmount(assetCache.totalBorrows - owed + owedRemaining);
updateInterestRate(assetStorage, assetCache);
logBorrowChange(assetCache, dTokenAddress, account, prevOwed, owedRemaining);
}
function transferBorrow(AssetStorage storage assetStorage, AssetCache memory assetCache, address dTokenAddress, address from, address to, uint origAmount) internal {
uint amount = origAmount * INTERNAL_DEBT_PRECISION;
(uint fromOwed, uint fromOwedPrev) = updateUserBorrow(assetStorage, assetCache, from);
(uint toOwed, uint toOwedPrev) = updateUserBorrow(assetStorage, assetCache, to);
if (toOwed == 0) doEnterMarket(to, assetCache.underlying);
// If amount was rounded up, transfer exact amount owed
if (amount > fromOwed && amount - fromOwed < INTERNAL_DEBT_PRECISION * assetCache.underlyingDecimalsScaler) amount = fromOwed;
require(fromOwed >= amount, "e/insufficient-balance");
unchecked { fromOwed -= amount; }
// Transfer any residual dust
if (fromOwed < INTERNAL_DEBT_PRECISION) {
amount += fromOwed;
fromOwed = 0;
}
toOwed += amount;
assetStorage.users[from].owed = encodeDebtAmount(fromOwed);
assetStorage.users[to].owed = encodeDebtAmount(toOwed);
logBorrowChange(assetCache, dTokenAddress, from, fromOwedPrev, fromOwed);
logBorrowChange(assetCache, dTokenAddress, to, toOwedPrev, toOwed);
}
// Reserves
function increaseReserves(AssetStorage storage assetStorage, AssetCache memory assetCache, uint amount) internal {
assetStorage.reserveBalance = assetCache.reserveBalance = encodeSmallAmount(assetCache.reserveBalance + amount);
assetStorage.totalBalances = assetCache.totalBalances = encodeAmount(assetCache.totalBalances + amount);
}
// Token asset transfers
// amounts are in underlying units
function pullTokens(AssetCache memory assetCache, address from, uint amount) internal returns (uint amountTransferred) {
uint poolSizeBefore = assetCache.poolSize;
Utils.safeTransferFrom(assetCache.underlying, from, address(this), amount / assetCache.underlyingDecimalsScaler);
uint poolSizeAfter = assetCache.poolSize = decodeExternalAmount(assetCache, callBalanceOf(assetCache, address(this)));
require(poolSizeAfter >= poolSizeBefore, "e/negative-transfer-amount");
unchecked { amountTransferred = poolSizeAfter - poolSizeBefore; }
}
function pushTokens(AssetCache memory assetCache, address to, uint amount) internal returns (uint amountTransferred) {
uint poolSizeBefore = assetCache.poolSize;
Utils.safeTransfer(assetCache.underlying, to, amount / assetCache.underlyingDecimalsScaler);
uint poolSizeAfter = assetCache.poolSize = decodeExternalAmount(assetCache, callBalanceOf(assetCache, address(this)));
require(poolSizeBefore >= poolSizeAfter, "e/negative-transfer-amount");
unchecked { amountTransferred = poolSizeBefore - poolSizeAfter; }
}
// Liquidity
function getAssetPrice(address asset) internal returns (uint) {
bytes memory result = callInternalModule(MODULEID__RISK_MANAGER, abi.encodeWithSelector(IRiskManager.getPrice.selector, asset));
return abi.decode(result, (uint));
}
function getAccountLiquidity(address account) internal returns (uint collateralValue, uint liabilityValue) {
bytes memory result = callInternalModule(MODULEID__RISK_MANAGER, abi.encodeWithSelector(IRiskManager.computeLiquidity.selector, account));
(IRiskManager.LiquidityStatus memory status) = abi.decode(result, (IRiskManager.LiquidityStatus));
collateralValue = status.collateralValue;
liabilityValue = status.liabilityValue;
}
function checkLiquidity(address account) internal {
uint8 status = accountLookup[account].deferLiquidityStatus;
if (status == DEFERLIQUIDITY__NONE) {
callInternalModule(MODULEID__RISK_MANAGER, abi.encodeWithSelector(IRiskManager.requireLiquidity.selector, account));
} else if (status == DEFERLIQUIDITY__CLEAN) {
accountLookup[account].deferLiquidityStatus = DEFERLIQUIDITY__DIRTY;
}
}
// Optional average liquidity tracking
function computeNewAverageLiquidity(address account, uint deltaT) private returns (uint) {
uint currDuration = deltaT >= AVERAGE_LIQUIDITY_PERIOD ? AVERAGE_LIQUIDITY_PERIOD : deltaT;
uint prevDuration = AVERAGE_LIQUIDITY_PERIOD - currDuration;
uint currAverageLiquidity;
{
(uint collateralValue, uint liabilityValue) = getAccountLiquidity(account);
currAverageLiquidity = collateralValue > liabilityValue ? collateralValue - liabilityValue : 0;
}
return (accountLookup[account].averageLiquidity * prevDuration / AVERAGE_LIQUIDITY_PERIOD) +
(currAverageLiquidity * currDuration / AVERAGE_LIQUIDITY_PERIOD);
}
function getUpdatedAverageLiquidity(address account) internal returns (uint) {
uint lastAverageLiquidityUpdate = accountLookup[account].lastAverageLiquidityUpdate;
if (lastAverageLiquidityUpdate == 0) return 0;
uint deltaT = block.timestamp - lastAverageLiquidityUpdate;
if (deltaT == 0) return accountLookup[account].averageLiquidity;
return computeNewAverageLiquidity(account, deltaT);
}
function getUpdatedAverageLiquidityWithDelegate(address account) internal returns (uint) {
address delegate = accountLookup[account].averageLiquidityDelegate;
return delegate != address(0) && accountLookup[delegate].averageLiquidityDelegate == account
? getUpdatedAverageLiquidity(delegate)
: getUpdatedAverageLiquidity(account);
}
function updateAverageLiquidity(address account) internal {
uint lastAverageLiquidityUpdate = accountLookup[account].lastAverageLiquidityUpdate;
if (lastAverageLiquidityUpdate == 0) return;
uint deltaT = block.timestamp - lastAverageLiquidityUpdate;
if (deltaT == 0) return;
accountLookup[account].lastAverageLiquidityUpdate = uint40(block.timestamp);
accountLookup[account].averageLiquidity = computeNewAverageLiquidity(account, deltaT);
}
}
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