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Contract Name:
FixedRateMarket
Compiler Version
v0.8.18+commit.87f61d96
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: NONE
pragma solidity ^0.8.9;
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/math/Math.sol";
import "./interfaces/IFeeEmissionsQontroller.sol";
import "./interfaces/IFixedRateMarket.sol";
import "./interfaces/IQollateralManager.sol";
import "./interfaces/IQPriceOracle.sol";
import "./interfaces/ITradingEmissionsQontroller.sol";
import "./interfaces/IQAdmin.sol";
import "./interfaces/IQuoteManager.sol";
import "./interfaces/IWETH.sol";
import "./libraries/CustomErrors.sol";
import "./libraries/Interest.sol";
import "./libraries/LinkedList.sol";
import "./libraries/QTypes.sol";
contract FixedRateMarket is Initializable, ERC20Upgradeable, IFixedRateMarket {
using SafeERC20 for IERC20;
using LinkedList for LinkedList.OrderbookSide;
/// @notice Reserve storage gap so introduction of new parent class later on can be done via upgrade
uint256[50] __gap;
/// @notice Borrow side enum
uint8 private constant _SIDE_BORROW = 0;
/// @notice Lend side enum
uint8 private constant _SIDE_LEND = 1;
/// @notice Internal representation on null pointer for linked lists
uint64 private constant _NULL_POINTER = 0;
/// @notice Token dust size - effectively treat it as zero
uint private constant _DUST = 100;
/// @notice Contract storing all global Qoda parameters
IQAdmin private _qAdmin;
/// @notice Address of the ERC20 token which the loan will be denominated
IERC20 private _underlying;
/// @notice UNIX timestamp (in seconds) when the market matures
uint private _maturity;
/// @notice Storage for all borrows by a user
/// account => principalPlusInterest
mapping(address => uint) private _accountBorrows;
/// @notice Storage for qTokens redeemed so far by a user
/// account => qTokensRedeemed
mapping(address => uint) private _tokensRedeemed;
/// @notice Tokens redeemed across all users so far
uint private _tokensRedeemedTotal;
/// @notice Total protocol fee accrued in this market so far, in local currency
uint private _totalAccruedFees;
/// @notice For calculation of prorated protocol fee
uint private constant ONE_YEAR_IN_SECONDS = 365 * 24 * 60 * 60;
/// @notice Contract managing quotes
IQuoteManager private _quoteManager;
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
/// @notice Same as _status in `@openzeppelin/contracts/security/ReentrancyGuard.sol`
/// Reconstruct here instead of inheritance is to avoid storage slot sequence problem during
/// contract upgrade
uint256 private _status;
/// @notice Constructor for upgradeable contracts
/// @param qAdminAddr_ Address of the `QAdmin` contract
/// @param underlyingAddr_ Address of the underlying loan token denomination
/// @param maturity_ UNIX timestamp (in seconds) when the market matures
/// @param name_ Name of the market's ERC20 token
/// @param symbol_ Symbol of the market's ERC20 token
function initialize(
address qAdminAddr_,
address underlyingAddr_,
uint maturity_,
string memory name_,
string memory symbol_
) public initializer {
__ERC20_init(name_, symbol_);
_qAdmin = IQAdmin(qAdminAddr_);
_underlying = IERC20(underlyingAddr_);
_maturity = maturity_;
}
/// @notice Needed for native token operation when withdrawing from WETH
receive() external payable {}
modifier onlyAdmin() {
if (!_qAdmin.hasRole(_qAdmin.ADMIN_ROLE(), msg.sender)) {
revert CustomErrors.FRM_OnlyAdmin();
}
_;
}
/// @notice Modifier which checks that contract and specified operation is not paused
modifier whenNotPaused(uint operationId) {
if (_qAdmin.isPaused(address(this), operationId)) {
revert CustomErrors.FRM_OperationPaused(operationId);
}
_;
}
/// @notice Logic copied from `@openzeppelin/contracts/security/ReentrancyGuard.sol`
/// Reconstruct here instead of inheritance is to avoid storage slot sequence problem during
/// contract upgrade
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
if (_status == _ENTERED) {
revert CustomErrors.FRM_ReentrancyDetected();
}
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/** ADMIN FUNCTIONS **/
/// @notice Call upon initialization after deploying `QuoteManager` contract
/// @param quoteManagerAddress Address of `QuoteManager` deployment
function _setQuoteManager(address quoteManagerAddress) external onlyAdmin {
// Initialize the value
_quoteManager = IQuoteManager(quoteManagerAddress);
// Emit the event
emit SetQuoteManager(quoteManagerAddress);
}
/** USER INTERFACE **/
/// @notice Creates a new `Quote` and adds it to the `OrderbookSide` linked list by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param quoteType 0 for PV+APR, 1 for FV+APR
/// @param APR In decimal form scaled by 1e4 (ex. 1052 = 10.52%)
/// @param cashflow Can be PV or FV depending on `quoteType`
function createQuote(uint8 side, uint8 quoteType, uint64 APR, uint cashflow) external {
_quoteManager.createQuote(side, msg.sender, quoteType, APR, cashflow);
}
/// @notice Analogue of market order to borrow against current lend `Quote`s.
/// Only fills at most up to `amountPV`, any unfilled amount is discarded.
/// @param amountPV The maximum amount to borrow
/// @param maxAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
function borrow(uint amountPV, uint64 maxAPR) external nonReentrant whenNotPaused(301) {
_execMarketOrder(_SIDE_LEND, msg.sender, amountPV, maxAPR, false);
}
/// @notice Analogue of market order to borrow against current lend `Quote`s.
/// Only fills at most up to `amountPV`, any unfilled amount is discarded.
/// ETH will be sent to borrower
/// @param amountPV The maximum amount to borrow
/// @param maxAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
function borrowETH(uint amountPV, uint64 maxAPR) external nonReentrant whenNotPaused(301) {
if (address(_underlying) != _qAdmin.WETH()) {
revert CustomErrors.FRM_EthOperationNotPermitted();
}
_execMarketOrder(_SIDE_LEND, msg.sender, amountPV, maxAPR, true);
}
/// @notice Analogue of market order to lend against current borrow `Quote`s.
/// Only fills at most up to `amountPV`, any unfilled amount is discarded.
/// @param amountPV The maximum amount to lend
/// @param minAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
function lend(uint amountPV, uint64 minAPR) external nonReentrant whenNotPaused(302) {
_execMarketOrder(_SIDE_BORROW, msg.sender, amountPV, minAPR, false);
}
/// @notice Analogue of market order to lend against current borrow `Quote`s.
/// Only fills at most up to `msg.value`, any unfilled amount is discarded.
/// Excessive amount will be sent back to lender
/// Note that protocol fee should also be included as ETH sent in the function call
/// @param minAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
function lendETH(uint64 minAPR) external payable nonReentrant whenNotPaused(302) {
if (address(_underlying) != _qAdmin.WETH()) {
revert CustomErrors.FRM_EthOperationNotPermitted();
}
// Deduce corresponding amountPV if protocol fee is not included
uint amountPV = hypotheticalMaxLendPV(msg.value);
uint executedPV = _execMarketOrder(_SIDE_BORROW, msg.sender, amountPV, minAPR, true);
_refundExcessiveETH(executedPV + proratedProtocolFee(executedPV));
}
/// @notice Borrower will make repayments to the smart contract, which
/// holds the value in escrow until maturity to release to lenders.
/// @param amount Amount to repay
/// @return uint Remaining account borrow amount
function repayBorrow(uint amount) external nonReentrant whenNotPaused(303) returns(uint) {
return _repayBorrow(msg.sender, amount, false, false);
}
/// @notice Borrower will make repayments to the smart contract using ETH, which
/// holds the value in escrow until maturity to release to lenders.
/// @return uint Remaining account borrow amount
function repayBorrowWithETH() external payable nonReentrant whenNotPaused(303) returns(uint) {
if (address(_underlying) != _qAdmin.WETH()) {
revert CustomErrors.FRM_EthOperationNotPermitted();
}
uint balanceBefore = _accountBorrows[msg.sender];
uint balanceAfter = _repayBorrow(msg.sender, msg.value, true, false);
_refundExcessiveETH(balanceBefore - balanceAfter);
return balanceAfter;
}
/// @notice Cancel `Quote` by id. Note this is a O(1) operation
/// since `OrderbookSide` uses hashmaps under the hood. However, it is
/// O(n) against the array of `Quote` ids by account so we should ensure
/// that array should not grow too large in practice.
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param id Id of the `Quote`
function cancelQuote(uint8 side, uint64 id) external {
_quoteManager.cancelQuote(true, side, msg.sender, id);
}
/// @notice This function allows net lenders to redeem qTokens for the
/// underlying token. Redemptions may only be permitted after loan maturity
/// plus `_maturityGracePeriod`. The public interface redeems specified amount
/// of qToken from existing balance.
/// @param amount Amount of qTokens to redeem
/// @return uint Amount of qTokens redeemed
function redeemQTokensByRatio(uint amount) external nonReentrant whenNotPaused(304) returns(uint) {
return _redeemQTokensByRatio(amount, false);
}
/// @notice This function allows net lenders to redeem qTokens for the
/// underlying token. Redemptions may only be permitted after loan maturity
/// plus `_maturityGracePeriod`. The public interface redeems the entire qToken
/// balance.
/// @return uint Amount of qTokens redeemed
function redeemAllQTokensByRatio() external nonReentrant whenNotPaused(304) returns(uint) {
return _redeemQTokensByRatio(_redeemableQTokens(msg.sender), false);
}
/// @notice This function allows net lenders to redeem qTokens for ETH.
/// Redemptions may only be permitted after loan maturity plus
/// `_maturityGracePeriod`. The public interface redeems specified amount
/// of qToken from existing balance.
/// @param amount Amount of qTokens to redeem
/// @return uint Amount of qTokens redeemed
function redeemQTokensByRatioWithETH(uint amount) external nonReentrant whenNotPaused(304) returns(uint) {
if (address(_underlying) != _qAdmin.WETH()) {
revert CustomErrors.FRM_EthOperationNotPermitted();
}
return _redeemQTokensByRatio(amount, true);
}
/// @notice This function allows net lenders to redeem qTokens for ETH.
/// Redemptions may only be permitted after loan maturity plus
/// `_maturityGracePeriod`. The public interface redeems the entire qToken
/// balance.
/// @return uint Amount of qTokens redeemed
function redeemAllQTokensByRatioWithETH() external nonReentrant whenNotPaused(304) returns(uint) {
if (address(_underlying) != _qAdmin.WETH()) {
revert CustomErrors.FRM_EthOperationNotPermitted();
}
return _redeemQTokensByRatio(_redeemableQTokens(msg.sender), true);
}
/// @notice If an account is in danger of being underwater (i.e. collateralRatio < 1.0)
/// or has not repaid past maturity plus `_repaymentGracePeriod`, any user may
/// liquidate that account by paying back the loan on behalf of the account. In return,
/// the liquidator receives collateral belonging to the account equal in value to
/// the repayment amount in USD plus the liquidation incentive amount as a bonus.
/// @param borrower Address of account to liquidate
/// @param amount Amount to repay on behalf of account in the currency of the loan
/// @param collateralToken Liquidator's choice of which currency to be paid in
function liquidateBorrow(address borrower, uint amount, IERC20 collateralToken) external nonReentrant whenNotPaused(305) {
_liquidateBorrow(borrower, amount, collateralToken, false);
}
/** VIEW FUNCTIONS **/
/// @notice Get the address of the `QAdmin`
/// @return address
function qAdmin() external view returns(address) {
return address(_qAdmin);
}
/// @notice Get the address of the `QollateralManager`
/// @return address
function qollateralManager() external view returns(address){
return _qAdmin.qollateralManager();
}
/// @notice Get the address of the `QuoteManager`
/// @return address
function quoteManager() external view returns(address){
return address(_quoteManager);
}
/// @notice Get the address of the ERC20 token which the loan will be denominated
/// @return IERC20
function underlyingToken() external view returns(IERC20) {
return _underlying;
}
/// @notice Get the UNIX timestamp (in seconds) when the market matures
/// @return uint
function maturity() external view returns(uint){
return _maturity;
}
/// @notice Get the minimum quote size for this market
/// @return uint Minimum quote size, in PV terms, local currency
function minQuoteSize() external view returns(uint) {
return _qAdmin.minQuoteSize(address(this));
}
/// @notice Get the total balance of borrows by user
/// @param account Account to query
/// @return uint Borrows
function accountBorrows(address account) external view returns(uint){
return _accountBorrows[account];
}
/// @notice Get the linked list pointer top of book for `Quote` by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return uint64 id of top of book `Quote`
function getQuoteHeadId(uint8 side) external view returns(uint64) {
return _quoteManager.getQuoteHeadId(side);
}
/// @notice Get the top of book for `Quote` by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return QTypes.Quote head `Quote`
function getQuoteHead(uint8 side) external view returns(QTypes.Quote memory) {
return _quoteManager.getQuoteHead(side);
}
/// @notice Get the `Quote` for the given `side` and `id`
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param id Id of `Quote`
/// @return QTypes.Quote `Quote` associated with the id
function getQuote(uint8 side, uint64 id) external view returns(QTypes.Quote memory) {
return _quoteManager.getQuote(side, id);
}
/// @notice Get all live `Quote` id's by `account` and `side`
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param account Account to query
/// @return uint[] Unsorted array of borrow `Quote` id's
function getAccountQuotes(uint8 side, address account) external view returns(uint64[] memory) {
return _quoteManager.getAccountQuotes(side, account);
}
/// @notice Get the number of active `Quote`s by `side` in the orderbook
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return uint Number of `Quote`s
function getNumQuotes(uint8 side) external view returns(uint) {
return _quoteManager.getNumQuotes(side);
}
/// @notice Gets the `protocolFee` associated with this market
/// @return uint annualized protocol fee, scaled by 1e4
function protocolFee() public view returns(uint) {
// If fee emissions qontroller is not defined, no protocol fee will be charged
if (address(_qAdmin.feeEmissionsQontroller()) == address(0)) {
return 0;
}
return _qAdmin.protocolFee(address(this));
}
/// @notice Gets the `protocolFee` associated with this market, prorated by time till maturity
/// @param amount loan amount
/// @return uint prorated protocol fee in local currency
function proratedProtocolFee(uint amount) public view returns(uint) {
return proratedProtocolFee(amount, block.timestamp);
}
/// @notice Gets the `protocolFee` associated with this market, prorated by time till maturity
/// @param amount loan amount
/// @param timestamp UNIX timestamp in seconds
/// @return uint prorated protocol fee in local currency
function proratedProtocolFee(uint amount, uint timestamp) public view returns(uint) {
if (timestamp >= _maturity) {
revert CustomErrors.FRM_MarketExpired();
}
return amount * protocolFee() * (_maturity - timestamp) / _qAdmin.MANTISSA_BPS() / ONE_YEAR_IN_SECONDS;
}
/// @notice Get amount of qTokens user can redeem based on current loan repayment ratio
/// @return uint amount of qTokens user can redeem
function redeemableQTokens() external view returns(uint) {
return _redeemableQTokens(msg.sender);
}
/// @notice Get amount of qTokens user can redeem based on current loan repayment ratio
/// @param account Account to query
/// @return uint amount of qTokens user can redeem
function redeemableQTokens(address account) external view returns(uint) {
return _redeemableQTokens(account);
}
/// @notice Gets the current `redemptionRatio` where owned qTokens can be redeemed up to
/// @return uint redemption ratio, capped and scaled by 1e18
function redemptionRatio() external view returns(uint) {
return _redeemableQTokensByRatio(_qAdmin.MANTISSA_DEFAULT());
}
/// @notice Tokens redeemed across all users so far
function tokensRedeemedTotal() external view returns(uint) {
return _tokensRedeemedTotal;
}
/// @notice Get total protocol fee accrued in this market so far, in local currency
/// @return uint accrued fee
function totalAccruedFees() external view returns(uint) {
return _totalAccruedFees;
}
/// @notice Get the PV of a cashflow amount based on the `quoteType`
/// @param quoteType 0 for PV, 1 for FV
/// @param APR In decimal form scaled by 1e4 (ex. 10.52% = 1052)
/// @param sTime PV start time
/// @param eTime FV end time
/// @param amount Value to be PV'ed
/// @return uint PV of the `amount`
function getPV(
uint8 quoteType,
uint64 APR,
uint amount,
uint sTime,
uint eTime
) public view returns(uint) {
return _quoteManager.getPV(quoteType, APR, amount, sTime, eTime);
}
/// @notice Get the FV of a cashflow amount based on the `quoteType`
/// @param quoteType 0 for PV, 1 for FV
/// @param APR In decimal form scaled by 1e4 (ex. 10.52% = 1052)
/// @param sTime PV start time
/// @param eTime FV end time
/// @param amount Value to be FV'ed
/// @return uint FV of the `amount`
function getFV(
uint8 quoteType,
uint64 APR,
uint amount,
uint sTime,
uint eTime
) public view returns(uint) {
return _quoteManager.getFV(quoteType, APR, amount, sTime, eTime);
}
/// @notice Get maximum value user can lend with given amount when protocol fee is factored in.
/// Mantissa is added to reduce precision error during calculation
/// @param amount Lending amount with protocol fee factored in
/// @return uint Maximum value user can lend with protocol fee considered
function hypotheticalMaxLendPV(uint amount) public view returns (uint) {
// Round up denominator if it is not fully divisible
uint num = amount * 1e18;
uint denom = 1e18 + proratedProtocolFee(1e18);
return num / (denom + Math.min(num % denom, 1));
}
/** INTERNAL FUNCTIONS **/
/// @notice Called under the hood by external `borrow` and `lend` functions.
/// This function loops through the opposite `OrderbookSide`, executing loans
/// until either the full amount is filled, the `OrderbookSide` is empty, or
/// no more `Quote`s exist that satisfy the `limitAPR` set by the market order.
/// @param quoteSide 0 for borrow `Quote`, 1 for lend `Quote`
/// @param account Address of the `Acceptor`
/// @param amountPV Amount that the `Acceptor` wants to execute, as PV
/// @param limitAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
/// @param isPaidInETH Is amount being paid in ETH
/// @return uint Total amount executed in PV terms
function _execMarketOrder(
uint8 quoteSide,
address account,
uint amountPV,
uint64 limitAPR,
bool isPaidInETH
) internal returns (uint) {
// Store the initial requested `Acceptor` size - must be positive
if (amountPV <= 0) {
revert CustomErrors.FRM_AmountZero();
}
uint amountRemaining = amountPV;
// Start `Quote`s from head
QTypes.Quote memory currQuote = _quoteManager.getQuoteHead(quoteSide);
uint totalExecutedPV = 0;
uint totalExecutedFV = 0;
while(amountRemaining > 0) {
if((quoteSide == _SIDE_LEND && limitAPR < currQuote.APR) ||
(quoteSide == _SIDE_BORROW && limitAPR > currQuote.APR)) {
// Stop loop condition: `limitAPR` works as a limit price.
// Since `Quote`s are ordered by APR, if the current `Quote` is past
// the limit, we know all remaining `Quote`s will not satisfy the
// `Acceptor`s conditions
break;
} else if(currQuote.id == _NULL_POINTER) {
// Stop loop condition: No more `Quote`s remaining
break;
} else if(account == currQuote.quoter) {
// Cannot execute `Quote` against self - just ignore it
// Move to the next `Quote` in line
currQuote = _quoteManager.getQuote(quoteSide, currQuote.next);
} else if(!_quoteManager.isQuoteValid(quoteSide, currQuote)) {
// Store the pointer to the next best `Quote`
uint64 next = currQuote.next;
// Clean up invalid `Quote`s. If the current `Quote` is not valid, it
// will be cancelled automatically without notice to the creator of
// the `Quote`
_quoteManager.cancelQuote(false, quoteSide, currQuote.quoter, currQuote.id);
// Move to the next `Quote` in line
currQuote = _quoteManager.getQuote(quoteSide, next);
} else {
// `Quote` is valid. Preprocess and then execute the loan
(uint execAmountPV, uint execAmountFV) = _preprocessLoan(quoteSide, currQuote.id, account, amountRemaining, isPaidInETH);
totalExecutedPV += execAmountPV;
totalExecutedFV += execAmountFV;
// Just in case of potential rounding errors, floor the new `amountRemaining` at zero
if(amountRemaining > execAmountPV) {
amountRemaining = amountRemaining - execAmountPV;
} else {
amountRemaining = 0;
}
// Move to the next `Quote` in line
currQuote = _quoteManager.getQuote(quoteSide, currQuote.next);
}
}
if (totalExecutedPV > 0) {
emit ExecMarketOrder(quoteSide, account, totalExecutedPV, totalExecutedFV);
}
return totalExecutedPV;
}
/// @notice Intermediary function that handles order/quote sides, PV/FV
/// and actual executed amount calculations, and updates `Quote` fill status
/// @param quoteSide 0 for borrow `Quote`, 1 for lend `Quote`
/// @param quoteId Id of the `Quote`
/// @param acceptor Address of the `Acceptor`
/// @param acceptorAmountPV Amount that the `Acceptor` wants to execute, as PV
/// @param isPaidInETH Is amount being paid in ETH
/// @return uint execAmountPV uint execAmountFV
function _preprocessLoan(
uint8 quoteSide,
uint64 quoteId,
address acceptor,
uint acceptorAmountPV,
bool isPaidInETH
) internal returns(uint,uint){
// Get immutable instance of `Quote`
QTypes.Quote memory quote = _quoteManager.getQuote(quoteSide, quoteId);
uint execAmountPV;
uint execAmountFV;
if(quote.quoteType == 0){ // Quote is in PV terms
// Executing Amount must be the smaller of the `Quoter` and `Acceptor` size
execAmountPV = Math.min(acceptorAmountPV, quote.cashflow - quote.filled);
// Get the equivalent executed amount in PV terms
execAmountFV = Interest.PVToFV(
quote.APR,
execAmountPV,
block.timestamp,
_maturity,
_qAdmin.MANTISSA_BPS()
);
// Update the filled amount for the `Quote`
quote.filled += execAmountPV;
_quoteManager.fillQuote(quoteSide, quoteId, execAmountPV);
}else { // Quote is in FV terms
// Get the equivalent FV amount of Acceptor's original amount
uint acceptorAmountFV = Interest.PVToFV(
quote.APR,
acceptorAmountPV,
block.timestamp,
_maturity,
_qAdmin.MANTISSA_BPS()
);
// Executing Amount must be the smaller of the `Quoter` and `Acceptor` size
execAmountFV = Math.min(acceptorAmountFV, quote.cashflow - quote.filled);
// Get the equivalent executed amount in PV terms
execAmountPV = Interest.FVToPV(
quote.APR,
execAmountFV,
block.timestamp,
_maturity,
_qAdmin.MANTISSA_BPS()
);
// Update the filled amount for the `Quote`
quote.filled += execAmountFV;
_quoteManager.fillQuote(quoteSide, quoteId, execAmountFV);
}
address quoter = quote.quoter;
uint64 apr = quote.APR;
if (quote.cashflow - quote.filled < _DUST) {
// If `Quote` is fully filled (minus dust), remove it from the `OrderbookSide`
_quoteManager.cancelQuote(false, quoteSide, quote.quoter, quote.id);
}
// Create the loan, taking care to differentiate whether the `Quoter` is the
// lender and `Acceptor` is the borrower, or vice versa
if (quoteSide == _SIDE_BORROW) {
return _createFixedRateLoan(quoteSide, quoter, acceptor, execAmountPV, execAmountFV, proratedProtocolFee(execAmountPV), apr, isPaidInETH);
}
if (quoteSide == _SIDE_LEND) {
return _createFixedRateLoan(quoteSide, acceptor, quoter, execAmountPV, execAmountFV, proratedProtocolFee(execAmountPV), apr, isPaidInETH);
}
revert CustomErrors.FRM_InvalidSide();
}
/// @notice Mint the future `qToken`s to the lender, add `amountFV` to the
/// borrower's debts, transfer `amountPV` from lender to borrower, and accrue
/// `protocolFee`s to the `FeeEmissionsQontroller`
/// @param quoteSide 0 for borrow `Quote`, 1 for lend `Quote`
/// @param borrower Account of the borrower
/// @param lender Account of the lender
/// @param amountPV Size of the initial loan paid by lender
/// @param amountFV Final amount that must be paid by borrower
/// @param protocolFee_ Protocol fee to be paid by both lender and borrower in the transaction
/// @param APR In decimal form scaled by 1e4 (ex. 10.52% = 1052)
/// @param isPaidInETH Is amount being paid in ETH
/// @return uint execAmountPV uint execAmountFV
function _createFixedRateLoan(
uint8 quoteSide,
address borrower,
address lender,
uint amountPV,
uint amountFV,
uint protocolFee_,
uint64 APR,
bool isPaidInETH
) internal returns(uint, uint){
// Loan amount must be strictly positive
if (amountPV <= 0) {
revert CustomErrors.FRM_AmountZero();
}
// Interest rate needs to be positive
if (amountPV >= amountFV) {
revert CustomErrors.FRM_InvalidAPR();
}
// AmountPV should be able to cover protocolFee cost
if (amountPV <= protocolFee_) {
revert CustomErrors.FRM_AmountLessThanProtocolFee();
}
// Cannot execute loan against self
if (lender == borrower) {
revert CustomErrors.FRM_InvalidCounterparty();
}
// Cannot create a loan past its maturity time
if (block.timestamp >= _maturity) {
revert CustomErrors.FRM_InvalidMaturity();
}
// If contract is to act on behalf of lender, assume upstream has handled related fund transfer to the contract.
// So no fund availability check is needed here.
if (quoteSide != _SIDE_BORROW || !isPaidInETH) {
// Check lender has approved contract spend
if (_underlying.allowance(lender, address(this)) < amountPV + protocolFee_) {
revert CustomErrors.FRM_InsufficientAllowance();
}
// Check lender has enough balance
if (_underlying.balanceOf(lender) < amountPV + protocolFee_) {
revert CustomErrors.FRM_InsufficientBalance();
}
}
// TODO: is there any way to only require the `amountPV` at time of inception of
// loan and slowly converge the required collateral to equal `amountFV` by end
// of loan? This allows for improved capital efficiency / less collateral upfront
// required by borrower
// Check if borrowing amount is above max borrow and update market participated
_checkRatioAndAddParticipatedMarket(borrower, lender, amountFV);
// The borrow amount of the borrower increases by the full `amountFV`
_accountBorrows[borrower] += amountFV;
// Net off borrow amount with any balance of qTokens the borrower may have
_repayBorrow(borrower, balanceOf(borrower), false, true);
// Transfer `amountPV` from lender to borrower, and protocolFee from both
// lender and borrower to `FeeEmissionsQontroller`.
// Note that lender will pay `protocolFee_` from their account balance,
// while borrower will pay `protocolFee_` from their borrowed amount. So
// total amount involved in transfer = amountPV + protocolFee_
// Also note that if it is WETH market and borrower intends to receive ETH,
// contract will receive on behalf and do token unwrapping outside this function
IFeeEmissionsQontroller feq = IFeeEmissionsQontroller(_qAdmin.feeEmissionsQontroller());
bool lenderInitiate = quoteSide == _SIDE_BORROW;
if (address(feq) == address(0)) {
_transferTokenOrETH(lender, borrower, amountPV, isPaidInETH && lenderInitiate, isPaidInETH && !lenderInitiate);
} else {
// No token unwrapping is need for FeeEmissionsQontroller as target recipient
_transferTokenOrETH(lender, address(feq), protocolFee_ * 2, isPaidInETH && lenderInitiate, false);
_transferTokenOrETH(lender, borrower, amountPV - protocolFee_, isPaidInETH && lenderInitiate, isPaidInETH && !lenderInitiate);
_totalAccruedFees += protocolFee_ * 2;
feq.receiveFees(_underlying, protocolFee_ * 2);
}
// Lender receives `amountFV` amount in qTokens
// Put this last to protect against reentracy
//TODO Probably want use a reentrancy guard instead here
_mint(lender, amountFV);
// Net off the minted amount with any borrow amounts the lender may have
_repayBorrow(lender, balanceOf(lender), false, true);
// Finally, report trading volumes for trading rewards
_updateTradingRewards(borrower, lender, amountPV);
// Emit the matched borrower and lender and fixed rate loan terms
emit FixedRateLoan(quoteSide, borrower, lender, amountPV, amountFV, protocolFee_, APR);
return (amountPV, amountFV);
}
/// @notice Check if borrowing amount is breaching maximum allow amount borrow,
/// which is determined by initCollateralRatio and creditLimit.
/// Note `_initCollateralRatio` is a larger value than `_minCollateralRatio`.
/// This protects users from taking loans at the minimum threshold,
/// putting them at risk of instant liquidation.
/// @param borrower Account of the borrower
/// @param lender Account of the lender
/// @param amountFV Final amount that must be paid by borrower
function _checkRatioAndAddParticipatedMarket(address borrower, address lender, uint amountFV) internal {
IQollateralManager qm = IQollateralManager(_qAdmin.qollateralManager());
IFixedRateMarket currentMarket = IFixedRateMarket(address(this));
uint maxBorrowFV = qm.hypotheticalMaxBorrowFV(borrower, currentMarket);
if (amountFV > maxBorrowFV) {
revert CustomErrors.FRM_MaxBorrowExceeded();
}
// Record that the lender/borrow have participated in this market
if(!qm.accountMarkets(lender, currentMarket)){
qm._addAccountMarket(lender, currentMarket);
}
if(!qm.accountMarkets(borrower, currentMarket)){
qm._addAccountMarket(borrower, currentMarket);
}
}
/// @notice Internal function for lender to redeem qTokens after maturity
/// please see `redeemQTokensByRatio()` for parameter and return value description
/// @param amount Amount of qTokens to redeem
/// @param isPaidInETH Is amount being paid in ETH
/// @return uint Amount of qTokens redeemed
function _redeemQTokensByRatio(uint amount, bool isPaidInETH) internal returns(uint) {
// Redeem is not possible if targeted redeemable amount is zero
if (amount <= 0) {
revert CustomErrors.FRM_ZeroRedeemAmount();
}
// Enforce maturity + grace period before allowing redemptions
if (block.timestamp <= _maturity + _qAdmin.maturityGracePeriod()) {
revert CustomErrors.FRM_CannotRedeemEarly();
}
// Amount to redeem must not exceed loan repayment ratio
if (amount > _redeemableQTokens(msg.sender)) {
revert CustomErrors.FRM_AmountExceedsRedeemable();
}
// Burn the qToken balance
_burn(msg.sender, amount);
// Increase redeemed amount
_tokensRedeemed[msg.sender] += amount;
_tokensRedeemedTotal += amount;
// Release the underlying token back to the lender
_transferTokenOrETH(address(this), msg.sender, amount, false, isPaidInETH);
// Emit the event
emit RedeemQTokens(msg.sender, amount);
return amount;
}
/// @notice Borrower will make repayments to the smart contract, which
/// holds the value in escrow until maturity to release to lenders.
/// @param amount Amount to repay
/// @param isPaidInETH Is amount being paid in ETH
/// @param isPaidInQTokens Is amount being paid with qTokens
/// @return uint Remaining account borrow amount
function _repayBorrow(address account, uint amount, bool isPaidInETH, bool isPaidInQTokens) internal returns(uint){
// Don't allow users to pay more than necessary
amount = Math.min(amount, _accountBorrows[account]);
if (isPaidInQTokens) {
if(amount == 0) {
// Short-circuit: If user has no qTokens, no need to do anything
return _accountBorrows[account];
}
// Burn the qTokens from the account and subtract the amount for the user's borrows
_burn(account, amount);
} else {
// Repayment amount must be positive
if (amount <= 0) {
revert CustomErrors.FRM_AmountZero();
}
// Transfer amount from borrower to contract for escrow until maturity
_transferTokenOrETH(account, address(this), amount, isPaidInETH, false);
}
// Deduct from the account's total debts
// Guaranteed not to underflow due to the flooring on amount above
_accountBorrows[account] -= amount;
// Emit the event
emit RepayBorrow(account, amount, isPaidInQTokens);
return _accountBorrows[account];
}
/// @notice If an account is in danger of being underwater (i.e. collateralRatio < 1.0)
/// or has not repaid past maturity plus `_repaymentGracePeriod`, any user may
/// liquidate that account by paying back the loan on behalf of the account. In return,
/// the liquidator receives collateral belonging to the account equal in value to
/// the repayment amount in USD plus the liquidation incentive amount as a bonus.
/// @param borrower Address of account to liquidate
/// @param amount Amount to repay on behalf of account in the currency of the loan
/// @param collateralToken Liquidator's choice of which currency to be paid in
/// @param isPaidInETH Is amount being paid in ETH
/// @return uint Amount transferred for liquidation
function _liquidateBorrow(address borrower, uint amount, IERC20 collateralToken, bool isPaidInETH) internal returns(uint) {
IQollateralManager qm = IQollateralManager(_qAdmin.qollateralManager());
uint repaymentGracePeriod = _qAdmin.repaymentGracePeriod();
// Ensure borrower is either underwater or past payment due date.
// These are the necessary conditions before borrower can be liquidated.
if (qm.collateralRatio(borrower) >= _qAdmin.minCollateralRatio(borrower) &&
block.timestamp <= _maturity + repaymentGracePeriod) {
revert CustomErrors.FRM_NotLiquidatable();
}
// For borrowers that are underwater, liquidator can only repay up
// to a percentage of the full loan balance determined by the `closeFactor`
uint closeFactor = qm.closeFactor();
// For borrowers that are past due date, ignore the close factor - liquidator
// can liquidate the entire sum
if(block.timestamp > _maturity){
closeFactor = _qAdmin.MANTISSA_FACTORS();
}
// Liquidator cannot repay more than the percentage of the full loan balance
// determined by `closeFactor`
uint maxRepayment = _accountBorrows[borrower] * closeFactor / _qAdmin.MANTISSA_FACTORS();
amount = Math.min(amount, maxRepayment);
// Amount must be positive
if (amount <= 0) {
revert CustomErrors.FRM_AmountZero();
}
// Get USD value of amount paid
uint amountUSD = qm.localToUSD(_underlying, amount);
// Get USD value of amount plus liquidity incentive
uint rewardUSD = amountUSD * _qAdmin.liquidationIncentive() / _qAdmin.MANTISSA_FACTORS();
// Get the local amount of collateral to reward liquidator
uint rewardLocal = qm.USDToLocal(collateralToken, rewardUSD);
// Ensure the borrower has enough collateral balance to pay the liquidator
if (rewardLocal > qm.collateralBalance(borrower, collateralToken)) {
revert CustomErrors.FRM_NotEnoughCollateral();
}
// Liquidator repays the loan on behalf of borrower
_transferTokenOrETH(msg.sender, address(this), amount, isPaidInETH, false);
// Credit the borrower's account
_accountBorrows[borrower] -= amount;
// Emit the event
emit LiquidateBorrow(borrower, msg.sender, amount, address(collateralToken), rewardLocal);
// Transfer the collateral balance from borrower to the liquidator
qm._transferCollateral(collateralToken, borrower, msg.sender, rewardLocal);
// Return amount transferred for liquidation
return amount;
}
/// @notice Tracks the amount traded, its associated protocol fees, normalize
/// to USD, and reports the data to `TradingEmissionsQontroller` which handles
/// disbursing token rewards for trading volumes
/// @param borrower Address of the borrower
/// @param lender Address of the lender
/// @param amountPV Amount traded (in local currency, in PV terms)
function _updateTradingRewards(address borrower, address lender, uint amountPV) internal {
// Instantiate interfaces
ITradingEmissionsQontroller teq = ITradingEmissionsQontroller(_qAdmin.tradingEmissionsQontroller());
if (address(teq) != address(0)) {
IQPriceOracle oracle = IQPriceOracle(_qAdmin.qPriceOracle());
// Get the associated protocol fees generated by the amount
uint feeLocal = proratedProtocolFee(amountPV);
// Convert the fee to USD
uint feeUSD = oracle.localToUSD(_underlying, feeLocal);
// report volumes to `TradingEmissionsQontroller`
teq.updateRewards(borrower, lender, feeUSD);
}
}
/** INTERNAL VIEW FUNCTIONS **/
/// @notice Get amount of qTokens user can redeem based on current loan repayment ratio
/// @param userAddress Address of the account to check
/// @return uint amount of qTokens user can redeem
function _redeemableQTokens(address userAddress) internal view returns(uint) {
uint held = balanceOf(userAddress);
if (held <= 0) {
return 0;
}
uint redeemed = _tokensRedeemed[userAddress];
uint redeemable = _redeemableQTokensByRatio(held + redeemed);
return redeemable > redeemed ? redeemable - redeemed : 0;
}
/// @notice Gets the current `redemptionRatio` where owned qTokens can be redeemed up to
/// @param amount amount of qToken for ratio to be applied to
/// @return uint redeemable qToken with `redemptionRatio` applied, capped by amount inputted
function _redeemableQTokensByRatio(uint amount) internal view returns(uint) {
uint repaidTotal = _underlying.balanceOf(address(this)) + _tokensRedeemedTotal; // escrow + redeemed qTokens
uint loanTotal = totalSupply() + _tokensRedeemedTotal; // redeemed tokens are also part of all minted qTokens
uint ratio = repaidTotal * amount / loanTotal;
return Math.min(ratio, amount);
}
/// @notice Transfer fund from sender to receiver, with handling of ETH wrapping and unwrapping
/// if needed. Note that this function will not perform balance check and it should be done
/// in the caller.
/// @param sender Account of the sender
/// @param receiver Account of the receiver
/// @param amount Size of the fund to be transferred from sender to receiver
/// @param isSendingETH Indicate if sender is sending fund with ETH
/// @param isReceivingETH Indicate if receiver is receiving fund with ETH
function _transferTokenOrETH(
address sender,
address receiver,
uint amount,
bool isSendingETH,
bool isReceivingETH
) internal {
address sender_ = sender;
address receiver_ = receiver;
// If it is ETH transfer, contract will send/receive on behalf
// and do needed token wrapping/unwrapping
if (isSendingETH) {
sender_ = address(this);
}
if (isReceivingETH) {
receiver_ = address(this);
}
// If sender uses ETH for transfer, token wrapping is needed
if (isSendingETH) {
IWETH weth = IWETH(_qAdmin.WETH());
weth.deposit{ value: amount }();
}
// Transfer `amount` from sender to receiver
if (sender_ == address(this)) {
_underlying.safeTransfer(receiver_, amount);
} else {
_underlying.safeTransferFrom(sender_, receiver_, amount);
}
// For receiver getting ETH in transfer, token unwrapping is needed
if (isReceivingETH) {
IWETH weth = IWETH(_qAdmin.WETH());
weth.withdraw(amount);
(bool success,) = receiver.call{value: amount}("");
if (!success) {
revert CustomErrors.FRM_UnsuccessfulEthTransfer();
}
}
}
/** ERC20 Implementation **/
/// @notice Number of decimal places of the qToken should match the number
/// of decimal places of the underlying token
/// @return uint8 Number of decimal places
function decimals() public view override(ERC20Upgradeable, IERC20MetadataUpgradeable) returns(uint8) {
return IERC20Metadata(address(_underlying)).decimals();
}
/// @notice This hook requires users trying to transfer their qTokens to only
/// be able to transfer tokens in excess of their current borrows. This is to
/// protect the protocol from users gaming the collateral management system
/// by borrowing off of the qToken and then immediately transferring out the
/// qToken to another address, leaving the borrowing account uncollateralized
/// @param from Address of the sender
/// @param to Address of the receiver
/// @param amount Amount of tokens to send
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
// Call parent hook first
super._beforeTokenTransfer(from, to, amount);
// Ignore hook for 0x000... address (e.g. _mint, _burn functions)
if(from == address(0) || to == address(0)){
return;
}
// Transfers rejected if borrows exceed lends
if (balanceOf(from) <= _accountBorrows[from]) {
revert CustomErrors.FRM_BorrowsMoreThanLends();
}
// Safe from underflow after previous require statement
if (amount > balanceOf(from) - _accountBorrows[from]) {
revert CustomErrors.FRM_AmountExceedsBorrows();
}
}
/// @notice This hook requires users to automatically repay any borrows their
/// accounts may still have after receiving the qTokens
/// @param from Address of the sender
/// @param to Address of the receiver
/// @param amount Amount of tokens to send
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override {
// Call parent hook first
super._afterTokenTransfer(from, to, amount);
// Ignore hook for 0x000... address (e.g. _mint, _burn functions)
if(from == address(0) || to == address(0)){
return;
}
_repayBorrow(to, amount, false, true);
}
/// @notice If user sends more ETH than is actually being executed, the excessive amount should
/// be refunded to the user
/// @param amountConsumed amount used in this transaction
function _refundExcessiveETH(uint amountConsumed) internal {
if (amountConsumed < msg.value) {
(bool success,) = msg.sender.call{value: msg.value - amountConsumed}("");
if (!success) {
revert CustomErrors.FRM_UnsuccessfulEthTransfer();
}
}
}
/// @notice Transfer allows qToken to be transferred from one address to another, but if is called after maturity,
/// redeemable amount will be subjected to current loan repayment ratio
/// @param to Address of the receiver
/// @param amount Amount of qTokens to send
/// @return true if the transfer is successful
function transfer(address to, uint256 amount) public virtual override(ERC20Upgradeable, IERC20Upgradeable) whenNotPaused(306) returns (bool) {
return _transferFrom(msg.sender, to, amount);
}
/// @notice TransferFrom allows spender to transfer qToken to another account in users' behalf,
/// but if is called after maturity, redeemable amount will be subjected to current loan repayment ratio
/// @param from Address of the qToken owner
/// @param to Address of the receiver
/// @param amount Amount of qTokens to send
/// @return true if the transfer is successful
function transferFrom(address from, address to, uint256 amount) public virtual override(ERC20Upgradeable, IERC20Upgradeable) whenNotPaused(306) returns (bool) {
return _transferFrom(from, to, amount);
}
/// @notice Internal function for spender to transfer qToken to another account in users' behalf,
/// please see `transferFrom()` for parameter and return value description
function _transferFrom(address from, address to, uint256 amount) internal returns (bool) {
// After maturity, amount to redeem must not exceed loan repayment ratio
if (block.timestamp > _maturity) {
if (block.timestamp <= _maturity + _qAdmin.maturityGracePeriod()) {
revert CustomErrors.FRM_CannotRedeemEarly();
}
uint redeemableTokens = _redeemableQTokens(from);
if (amount > redeemableTokens) {
revert CustomErrors.FRM_AmountExceedsRedeemable();
}
// qToken transferred away is considered the same as redeemed by the user
// redeemed token in total does not change because qToken transferred still exist in the contract
_tokensRedeemed[from] += amount;
}
if (from == msg.sender) {
return super.transfer(to, amount);
}
return super.transferFrom(from, to, amount);
}
function approve(address spender, uint256 amount) public virtual override(ERC20Upgradeable, IERC20Upgradeable) whenNotPaused(306) returns (bool) {
return super.approve(spender, amount);
}
function increaseAllowance(address spender, uint256 addedValue) public virtual override(ERC20Upgradeable) whenNotPaused(306) returns (bool) {
return super.increaseAllowance(spender, addedValue);
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual override(ERC20Upgradeable) whenNotPaused(306) returns (bool) {
return super.decreaseAllowance(spender, subtractedValue);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
* reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
* case an upgrade adds a module that needs to be initialized.
*
* For example:
*
* [.hljs-theme-light.nopadding]
* ```
* contract MyToken is ERC20Upgradeable {
* function initialize() initializer public {
* __ERC20_init("MyToken", "MTK");
* }
* }
* contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
* function initializeV2() reinitializer(2) public {
* __ERC20Permit_init("MyToken");
* }
* }
* ```
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
* the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() {
* _disableInitializers();
* }
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
* @custom:oz-retyped-from bool
*/
uint8 private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint8 version);
/**
* @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
* `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
*/
modifier initializer() {
bool isTopLevelCall = !_initializing;
require(
(isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
"Initializable: contract is already initialized"
);
_initialized = 1;
if (isTopLevelCall) {
_initializing = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
emit Initialized(1);
}
}
/**
* @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
* contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
* used to initialize parent contracts.
*
* `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
* initialization step. This is essential to configure modules that are added through upgrades and that require
* initialization.
*
* Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
* a contract, executing them in the right order is up to the developer or operator.
*/
modifier reinitializer(uint8 version) {
require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
_initialized = version;
_initializing = true;
_;
_initializing = false;
emit Initialized(version);
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} and {reinitializer} modifiers, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
/**
* @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
* Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
* to any version. It is recommended to use this to lock implementation contracts that are designed to be called
* through proxies.
*/
function _disableInitializers() internal virtual {
require(!_initializing, "Initializable: contract is initializing");
if (_initialized < type(uint8).max) {
_initialized = type(uint8).max;
emit Initialized(type(uint8).max);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
import "./IERC20Upgradeable.sol";
import "./extensions/IERC20MetadataUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../proxy/utils/Initializable.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {
__ERC20_init_unchained(name_, symbol_);
}
function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[45] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator,
Rounding rounding
) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. It the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`.
// We also know that `k`, the position of the most significant bit, is such that `msb(a) = 2**k`.
// This gives `2**k < a <= 2**(k+1)` → `2**(k/2) <= sqrt(a) < 2 ** (k/2+1)`.
// Using an algorithm similar to the msb conmputation, we are able to compute `result = 2**(k/2)` which is a
// good first aproximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1;
uint256 x = a;
if (x >> 128 > 0) {
x >>= 128;
result <<= 64;
}
if (x >> 64 > 0) {
x >>= 64;
result <<= 32;
}
if (x >> 32 > 0) {
x >>= 32;
result <<= 16;
}
if (x >> 16 > 0) {
x >>= 16;
result <<= 8;
}
if (x >> 8 > 0) {
x >>= 8;
result <<= 4;
}
if (x >> 4 > 0) {
x >>= 4;
result <<= 2;
}
if (x >> 2 > 0) {
result <<= 1;
}
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
uint256 result = sqrt(a);
if (rounding == Rounding.Up && result * result < a) {
result += 1;
}
return result;
}
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IFeeEmissionsQontroller {
/// @notice Emitted when user claims emissions
event ClaimEmissions(address indexed account, uint amount);
/// @notice Emitted when fee is accrued in a round
event FeesAccrued(uint indexed round, address token, uint amount, uint amountInRound);
/// @notice Emitted when we move to a new round
event NewFeeEmissionsRound(uint indexed currentPeriod, uint startTime, uint endTime);
/** ACCESS CONTROLLED FUNCTIONS **/
function receiveFees(IERC20 underlyingToken, uint feeLocal) external;
function veIncrease(address account, uint veIncreased) external;
function veReset(address account) external;
/** USER INTERFACE **/
function claimEmissions() external;
function claimEmissions(address account) external;
/** VIEW FUNCTIONS **/
function claimableEmissions() external view returns (uint);
function claimableEmissions(address account) external view returns (uint);
function expectedClaimableEmissions() external view returns (uint);
function expectedClaimableEmissions(address account) external view returns (uint);
function qAdmin() external view returns (address);
function veToken() external view returns (address);
function swapContract() external view returns (address);
function WETH() external view returns (IERC20);
function emissionsRound() external view returns (uint, uint, uint);
function emissionsRound(uint round_) external view returns (uint, uint, uint);
function timeTillRoundEnd() external view returns (uint);
function stakedVeAtRound(address account, uint round) external view returns (uint);
function roundInterval() external view returns (uint);
function currentRound() external view returns (uint);
function lastClaimedRound() external view returns (uint);
function lastClaimedRound(address account) external view returns (uint);
function lastClaimedVeBalance() external view returns (uint);
function lastClaimedVeBalance(address account) external view returns (uint);
function claimedEmissions() external view returns (uint);
function claimedEmissions(address account) external view returns (uint);
function totalFeesAccrued() external view returns (uint);
function totalFeesClaimed() external view returns (uint);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../libraries/QTypes.sol";
interface IFixedRateMarket is IERC20Upgradeable, IERC20MetadataUpgradeable {
/// @notice Emitted when market order is created and loan can be created with one or more quotes
event ExecMarketOrder(
uint8 indexed quoteSide,
address indexed account,
uint totalExecutedPV,
uint totalExecutedFV
);
/// @notice Emitted when a borrower repays borrow.
/// Boolean flag `withQTokens`= true if repaid via qTokens, false otherwise.
event RepayBorrow(address indexed borrower, uint amount, bool withQTokens);
/// @notice Emitted when a borrower is liquidated
event LiquidateBorrow(
address indexed borrower,
address indexed liquidator,
uint amount,
address collateralTokenAddr,
uint reward
);
/// @notice Emitted when a borrower and lender are matched for a fixed rate loan
event FixedRateLoan(
uint8 indexed quoteSide,
address indexed borrower,
address indexed lender,
uint amountPV,
uint amountFV,
uint feeIncurred,
uint64 APR
);
/// @notice Emitted when an account redeems their qTokens
event RedeemQTokens(address indexed account, uint amount);
/// @notice Emitted when setting `_quoteManager`
event SetQuoteManager(address quoteManagerAddress);
/** ADMIN FUNCTIONS **/
/// @notice Call upon initialization after deploying `QuoteManager` contract
/// @param quoteManagerAddress Address of `QuoteManager` deployment
function _setQuoteManager(address quoteManagerAddress) external;
/** USER INTERFACE **/
/// @notice Creates a new `Quote` and adds it to the `OrderbookSide` linked list by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param quoteType 0 for PV+APR, 1 for FV+APR
/// @param APR In decimal form scaled by 1e4 (ex. 1052 = 10.52%)
/// @param cashflow Can be PV or FV depending on `quoteType`
function createQuote(uint8 side, uint8 quoteType, uint64 APR, uint cashflow) external;
/// @notice Analogue of market order to borrow against current lend `Quote`s.
/// Only fills at most up to `amountPV`, any unfilled amount is discarded.
/// @param amountPV The maximum amount to borrow
/// @param maxAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
function borrow(uint amountPV, uint64 maxAPR) external;
/// @notice Analogue of market order to borrow against current lend `Quote`s.
/// Only fills at most up to `amountPV`, any unfilled amount is discarded.
/// ETH will be sent to borrower
/// @param amountPV The maximum amount to borrow
/// @param maxAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
function borrowETH(uint amountPV, uint64 maxAPR) external;
/// @notice Analogue of market order to lend against current borrow `Quote`s.
/// Only fills at most up to `amountPV`, any unfilled amount is discarded.
/// @param amountPV The maximum amount to lend
/// @param minAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
function lend(uint amountPV, uint64 minAPR) external;
/// @notice Analogue of market order to lend against current borrow `Quote`s.
/// Only fills at most up to `msg.value`, any unfilled amount is discarded.
/// Excessive amount will be sent back to lender
/// Note that protocol fee should also be included as ETH sent in the function call
/// @param minAPR Only accept `Quote`s up to specified APR. You may think of
/// this as a maximum slippage tolerance variable
function lendETH(uint64 minAPR) external payable;
/// @notice Borrower will make repayments to the smart contract, which
/// holds the value in escrow until maturity to release to lenders.
/// @param amount Amount to repay
/// @return uint Remaining account borrow amount
function repayBorrow(uint amount) external returns(uint);
/// @notice Borrower will make repayments to the smart contract using ETH, which
/// holds the value in escrow until maturity to release to lenders.
/// @return uint Remaining account borrow amount
function repayBorrowWithETH() external payable returns(uint);
/// @notice Cancel `Quote` by id. Note this is a O(1) operation
/// since `OrderbookSide` uses hashmaps under the hood. However, it is
/// O(n) against the array of `Quote` ids by account so we should ensure
/// that array should not grow too large in practice.
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param id Id of the `Quote`
function cancelQuote(uint8 side, uint64 id) external;
/// @notice This function allows net lenders to redeem qTokens for the
/// underlying token. Redemptions may only be permitted after loan maturity
/// plus `_maturityGracePeriod`. The public interface redeems specified amount
/// of qToken from existing balance.
/// @param amount Amount of qTokens to redeem
/// @return uint Amount of qTokens redeemed
function redeemQTokensByRatio(uint amount) external returns(uint);
/// @notice This function allows net lenders to redeem qTokens for the
/// underlying token. Redemptions may only be permitted after loan maturity
/// plus `_maturityGracePeriod`. The public interface redeems the entire qToken
/// balance.
/// @return uint Amount of qTokens redeemed
function redeemAllQTokensByRatio() external returns(uint);
/// @notice This function allows net lenders to redeem qTokens for ETH.
/// Redemptions may only be permitted after loan maturity plus
/// `_maturityGracePeriod`. The public interface redeems specified amount
/// of qToken from existing balance.
/// @param amount Amount of qTokens to redeem
/// @return uint Amount of qTokens redeemed
function redeemQTokensByRatioWithETH(uint amount) external returns(uint);
/// @notice This function allows net lenders to redeem qTokens for ETH.
/// Redemptions may only be permitted after loan maturity plus
/// `_maturityGracePeriod`. The public interface redeems the entire qToken
/// balance.
/// @return uint Amount of qTokens redeemed
function redeemAllQTokensByRatioWithETH() external returns(uint);
/// @notice If an account is in danger of being underwater (i.e. collateralRatio < 1.0)
/// or has not repaid past maturity plus `_repaymentGracePeriod`, any user may
/// liquidate that account by paying back the loan on behalf of the account. In return,
/// the liquidator receives collateral belonging to the account equal in value to
/// the repayment amount in USD plus the liquidation incentive amount as a bonus.
/// @param borrower Address of account to liquidate
/// @param amount Amount to repay on behalf of account in the currency of the loan
/// @param collateralToken Liquidator's choice of which currency to be paid in
function liquidateBorrow(address borrower, uint amount, IERC20 collateralToken) external;
/** VIEW FUNCTIONS **/
/// @notice Get the address of the `QAdmin`
/// @return address
function qAdmin() external view returns(address);
/// @notice Get the address of the `QollateralManager`
/// @return address
function qollateralManager() external view returns(address);
/// @notice Get the address of the `QuoteManager`
/// @return address
function quoteManager() external view returns(address);
/// @notice Get the address of the ERC20 token which the loan will be denominated
/// @return IERC20
function underlyingToken() external view returns(IERC20);
/// @notice Get the UNIX timestamp (in seconds) when the market matures
/// @return uint
function maturity() external view returns(uint);
/// @notice Get the minimum quote size for this market
/// @return uint Minimum quote size, in PV terms, local currency
function minQuoteSize() external view returns(uint);
/// @notice Get the total balance of borrows by user
/// @param account Account to query
/// @return uint Borrows
function accountBorrows(address account) external view returns(uint);
/// @notice Get the linked list pointer top of book for `Quote` by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return uint64 id of top of book `Quote`
function getQuoteHeadId(uint8 side) external view returns(uint64);
/// @notice Get the top of book for `Quote` by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return QTypes.Quote head `Quote`
function getQuoteHead(uint8 side) external view returns(QTypes.Quote memory);
/// @notice Get the `Quote` for the given `side` and `id`
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param id Id of `Quote`
/// @return QTypes.Quote `Quote` associated with the id
function getQuote(uint8 side, uint64 id) external view returns(QTypes.Quote memory);
/// @notice Get all live `Quote` id's by `account` and `side`
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param account Account to query
/// @return uint[] Unsorted array of borrow `Quote` id's
function getAccountQuotes(uint8 side, address account) external view returns(uint64[] memory);
/// @notice Get the number of active `Quote`s by `side` in the orderbook
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return uint Number of `Quote`s
function getNumQuotes(uint8 side) external view returns(uint);
/// @notice Gets the `protocolFee` associated with this market
/// @return uint annualized protocol fee, scaled by 1e4
function protocolFee() external view returns(uint);
/// @notice Gets the `protocolFee` associated with this market, prorated by time till maturity
/// @param amount loan amount
/// @return uint prorated protocol fee in local currency
function proratedProtocolFee(uint amount) external view returns(uint);
/// @notice Gets the `protocolFee` associated with this market, prorated by time till maturity
/// @param amount loan amount
/// @param timestamp UNIX timestamp in seconds
/// @return uint prorated protocol fee in local currency
function proratedProtocolFee(uint amount, uint timestamp) external view returns(uint);
/// @notice Get amount of qTokens user can redeem based on current loan repayment ratio
/// @return uint amount of qTokens user can redeem
function redeemableQTokens() external view returns(uint);
/// @notice Get amount of qTokens user can redeem based on current loan repayment ratio
/// @param account Account to query
/// @return uint amount of qTokens user can redeem
function redeemableQTokens(address account) external view returns(uint);
/// @notice Gets the current `redemptionRatio` where owned qTokens can be redeemed up to
/// @return uint redemption ratio, capped and scaled by 1e18
function redemptionRatio() external view returns(uint);
/// @notice Tokens redeemed across all users so far
function tokensRedeemedTotal() external view returns(uint);
/// @notice Get total protocol fee accrued in this market so far, in local currency
/// @return uint accrued fee
function totalAccruedFees() external view returns(uint);
/// @notice Get the PV of a cashflow amount based on the `quoteType`
/// @param quoteType 0 for PV, 1 for FV
/// @param APR In decimal form scaled by 1e4 (ex. 10.52% = 1052)
/// @param sTime PV start time
/// @param eTime FV end time
/// @param amount Value to be PV'ed
/// @return uint PV of the `amount`
function getPV(
uint8 quoteType,
uint64 APR,
uint amount,
uint sTime,
uint eTime
) external view returns(uint);
/// @notice Get the FV of a cashflow amount based on the `quoteType`
/// @param quoteType 0 for PV, 1 for FV
/// @param APR In decimal form scaled by 1e4 (ex. 10.52% = 1052)
/// @param sTime PV start time
/// @param eTime FV end time
/// @param amount Value to be FV'ed
/// @return uint FV of the `amount`
function getFV(
uint8 quoteType,
uint64 APR,
uint amount,
uint sTime,
uint eTime
) external view returns(uint);
/// @notice Get maximum value user can lend with given amount when protocol fee is factored in.
/// Mantissa is added to reduce precision error during calculation
/// @param amount Lending amount with protocol fee factored in
/// @return uint Maximum value user can lend with protocol fee considered
function hypotheticalMaxLendPV(uint amount) external view returns (uint);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./IFixedRateMarket.sol";
interface IQollateralManager {
/// @notice Emitted when an account deposits collateral into the contract
event DepositCollateral(address indexed account, address tokenAddress, uint amount);
/// @notice Emitted when an account withdraws collateral from the contract
event WithdrawCollateral(address indexed account, address tokenAddress, uint amount);
/// @notice Emitted when an account first interacts with the `Market`
event AddAccountMarket(address indexed account, address indexed market);
/// @notice Emitted when collateral is transferred from one account to another
event TransferCollateral(address indexed tokenAddress, address indexed from, address indexed to, uint amount);
/// @notice Constructor for upgradeable contracts
/// @param qAdminAddress_ Address of the `QAdmin` contract
/// @param qPriceOracleAddress_ Address of the `QPriceOracle` contract
function initialize(address qAdminAddress_, address qPriceOracleAddress_) external;
/** ADMIN/RESTRICTED FUNCTIONS **/
/// @notice Record when an account has either borrowed or lent into a
/// `FixedRateMarket`. This is necessary because we need to iterate
/// across all markets that an account has borrowed/lent to to calculate their
/// `borrowValue`. Only the `FixedRateMarket` contract itself may call
/// this function
/// @param account User account
/// @param market Address of the `FixedRateMarket` market
function _addAccountMarket(address account, IFixedRateMarket market) external;
/// @notice Transfer collateral balances from one account to another. Only
/// `FixedRateMarket` contracts can call this restricted function. This is used
/// for when a liquidator liquidates an account.
/// @param token ERC20 token
/// @param from Sender address
/// @param to Recipient address
/// @param amount Amount to transfer
function _transferCollateral(IERC20 token, address from, address to, uint amount) external;
/** USER INTERFACE **/
/// @notice Users call this to deposit collateral to fund their borrows
/// @param token ERC20 token
/// @param amount Amount to deposit (in local ccy)
/// @return uint New collateral balance
function depositCollateral(IERC20 token, uint amount) external returns(uint);
/// @notice Users call this to deposit collateral to fund their borrows, where their
/// collateral is automatically wrapped into MTokens for convenience so users can
/// automatically earn interest on their collateral.
/// @param underlying Underlying ERC20 token
/// @param amount Amount to deposit (in underlying local currency)
/// @return uint New collateral balance (in MToken balance)
function depositCollateralWithMTokenWrap(IERC20 underlying, uint amount) external returns(uint);
/// @notice Users call this to deposit collateral to fund their borrows, where their
/// collateral is automatically wrapped from ETH to WETH.
/// @return uint New collateral balance (in WETH balance)
function depositCollateralWithETH() external payable returns(uint);
/// @notice Users call this to deposit collateral to fund their borrows, where their
/// collateral is automatically wrapped from ETH into MTokens for convenience so users can
/// automatically earn interest on their collateral.
/// @return uint New collateral balance (in MToken balance)
function depositCollateralWithMTokenWrapWithETH() external payable returns(uint);
/// @notice Users call this to withdraw collateral
/// @param token ERC20 token
/// @param amount Amount to withdraw (in local ccy)
/// @return uint New collateral balance
function withdrawCollateral(IERC20 token, uint amount) external returns(uint);
/// @notice Users call this to withdraw mToken collateral, where their
/// collateral is automatically unwrapped into underlying tokens for
/// convenience.
/// @param mTokenAddress Yield-bearing token address
/// @param amount Amount to withdraw (in mToken local currency)
/// @return uint New collateral balance (in MToken balance)
function withdrawCollateralWithMTokenUnwrap(
address mTokenAddress,
uint amount
) external returns(uint);
/// @notice Users call this to withdraw ETH collateral, where their
/// collateral is automatically unwrapped from WETH for convenience.
/// @param amount Amount to withdraw (in WETH local currency)
/// @return uint New collateral balance (in WETH balance)
function withdrawCollateralWithETH(uint amount) external returns(uint);
/// @notice Users call this to withdraw mToken collateral, where their
/// collateral is automatically unwrapped into ETH for convenience.
/// @param amount Amount to withdraw (in WETH local currency)
/// @return uint New collateral balance (in MToken balance)
function withdrawCollateralWithMTokenWrapWithETH(uint amount) external returns(uint);
/** VIEW FUNCTIONS **/
/// @notice Get the address of the `QAdmin` contract
/// @return address Address of `QAdmin` contract
function qAdmin() external view returns(address);
/// @notice Get the address of the `QPriceOracle` contract
/// @return address Address of `QPriceOracle` contract
function qPriceOracle() external view returns(address);
/// @notice Get all enabled `Asset`s
/// @return address[] iterable list of enabled `Asset`s
function allAssets() external view returns(address[] memory);
/// @notice Gets the `CollateralFactor` associated with a ERC20 token
/// @param token ERC20 token
/// @return uint Collateral Factor, scaled by 1e8
function collateralFactor(IERC20 token) external view returns(uint);
/// @notice Gets the `MarketFactor` associated with a ERC20 token
/// @param token ERC20 token
/// @return uint Market Factor, scaled by 1e8
function marketFactor(IERC20 token) external view returns(uint);
/// @notice Return what the collateral ratio for an account would be
/// with a hypothetical collateral withdraw/deposit and/or token borrow/lend.
/// The collateral ratio is calculated as:
/// (`virtualCollateralValue` / `virtualBorrowValue`)
/// If the returned value falls below 1e8, the account can be liquidated
/// @param account User account
/// @param hypotheticalToken Currency of hypothetical withdraw / deposit
/// @param withdrawAmount Amount of hypothetical withdraw in local currency
/// @param depositAmount Amount of hypothetical deposit in local currency
/// @param hypotheticalMarket Market of hypothetical borrow
/// @param borrowAmount Amount of hypothetical borrow in local ccy
/// @param lendAmount Amount of hypothetical lend in local ccy
/// @return uint Hypothetical collateral ratio
function hypotheticalCollateralRatio(
address account,
IERC20 hypotheticalToken,
uint withdrawAmount,
uint depositAmount,
IFixedRateMarket hypotheticalMarket,
uint borrowAmount,
uint lendAmount
) external view returns(uint);
/// @notice Return the current collateral ratio for an account.
/// The collateral ratio is calculated as:
/// (`virtualCollateralValue` / `virtualBorrowValue`)
/// If the returned value falls below 1e8, the account can be liquidated
/// @param account User account
/// @return uint Collateral ratio
function collateralRatio(address account) external view returns(uint);
/// @notice Get the `collateralFactor` weighted value (in USD) of all the
/// collateral deposited for an account
/// @param account Account to query
/// @return uint Total value of account in USD, scaled to 1e18
function virtualCollateralValue(address account) external view returns(uint);
/// @notice Get the `collateralFactor` weighted value (in USD) for the tokens
/// deposited for an account
/// @param account Account to query
/// @param token ERC20 token
/// @return uint Value of token collateral of account in USD, scaled to 1e18
function virtualCollateralValueByToken(
address account,
IERC20 token
) external view returns(uint);
/// @notice Get the `marketFactor` weighted net borrows (i.e. borrows - lends)
/// in USD summed across all `Market`s participated in by the user
/// @param account Account to query
/// @return uint Borrow value of account in USD, scaled to 1e18
function virtualBorrowValue(address account) external view returns(uint);
/// @notice Get the `marketFactor` weighted net borrows (i.e. borrows - lends)
/// in USD for a particular `Market`
/// @param account Account to query
/// @param market `FixedRateMarket` contract
/// @return uint Borrow value of account in USD, scaled to 1e18
function virtualBorrowValueByMarket(
address account,
IFixedRateMarket market
) external view returns(uint);
/// @notice Return what the weighted total borrow value for an account would be with a hypothetical borrow
/// @param account Account to query
/// @param hypotheticalMarket Market of hypothetical borrow / lend
/// @param borrowAmount Amount of hypothetical borrow in local ccy
/// @param lendAmount Amount of hypothetical lend in local ccy
/// @return uint Borrow value of account in USD, scaled to 1e18
function hypotheticalVirtualBorrowValue(
address account,
IFixedRateMarket hypotheticalMarket,
uint borrowAmount,
uint lendAmount
) external view returns(uint);
/// @notice Get the unweighted value (in USD) of all the collateral deposited
/// for an account
/// @param account Account to query
/// @return uint Total value of account in USD, scaled to 1e18
function realCollateralValue(address account) external view returns(uint);
/// @notice Get the unweighted value (in USD) of the tokens deposited
/// for an account
/// @param account Account to query
/// @param token ERC20 token
/// @return uint Value of token collateral of account in USD, scaled to 1e18
function realCollateralValueByToken(
address account,
IERC20 token
) external view returns(uint);
/// @notice Get the unweighted current net value borrowed (i.e. borrows - lends)
/// in USD summed across all `Market`s participated in by the user
/// @param account Account to query
/// @return uint Borrow value of account in USD, scaled to 1e18
function realBorrowValue(address account) external view returns(uint);
/// @notice Get the unweighted current net value borrowed (i.e. borrows - lends)
/// in USD for a particular `Market`
/// @param account Account to query
/// @param market `FixedRateMarket` contract
/// @return uint Borrow value of account in USD, scaled to 1e18
function realBorrowValueByMarket(
address account,
IFixedRateMarket market
) external view returns(uint);
/// @notice Get an account's maximum available borrow amount in a specific FixedRateMarket.
/// For example, what is the maximum amount of GLMRJUL22 that an account can borrow
/// while ensuring their account health continues to be acceptable?
/// Note: This function will return 0 if market to borrow is disabled
/// Note: This function will return creditLimit() if maximum amount allowed for one market exceeds creditLimit()
/// Note: User can only borrow up to `initCollateralRatio` for their own protection against instant liquidations
/// @param account User account
/// @param borrowMarket Address of the `FixedRateMarket` market to borrow
/// @return uint Maximum available amount user can borrow (in FV) without breaching `initCollateralRatio`
function hypotheticalMaxBorrowFV(address account, IFixedRateMarket borrowMarket) external view returns(uint);
/// @notice Get the minimum collateral ratio. Scaled by 1e8.
/// @return uint Minimum collateral ratio
function minCollateralRatio() external view returns(uint);
/// @notice Get the minimum collateral ratio for a user account. Scaled by 1e8.
/// @param account User account
/// @return uint Minimum collateral ratio
function minCollateralRatio(address account) external view returns(uint);
/// @notice Get the initial collateral ratio. Scaled by 1e8
/// @return uint Initial collateral ratio
function initCollateralRatio() external view returns(uint);
/// @notice Get the initial collateral ratio for a user account. Scaled by 1e8
/// @param account User account
/// @return uint Initial collateral ratio
function initCollateralRatio(address account) external view returns(uint);
/// @notice Get the close factor. Scaled by 1e8
/// @return uint Close factor
function closeFactor() external view returns(uint);
/// @notice Get the liquidation incentive. Scaled by 1e8
/// @return uint Liquidation incentive
function liquidationIncentive() external view returns(uint);
/// @notice Use this for quick lookups of collateral balances by asset
/// @param account User account
/// @param token ERC20 token
/// @return uint Balance in local
function collateralBalance(address account, IERC20 token) external view returns(uint);
/// @notice Get iterable list of collateral addresses which an account has nonzero balance.
/// @param account User account
/// @return address[] Iterable list of ERC20 token addresses
function iterableCollateralAddresses(address account) external view returns(IERC20[] memory);
/// @notice Quick lookup of whether an account has a particular collateral
/// @param account User account
/// @param token ERC20 token addresses
/// @return bool True if account has collateralized with given ERC20 token, false otherwise
function accountCollateral(address account, IERC20 token) external view returns(bool);
/// @notice Get iterable list of all Markets which an account has participated
/// @param account User account
/// @return address[] Iterable list of `FixedRateLoanMarket` contract addresses
function iterableAccountMarkets(address account) external view returns(IFixedRateMarket[] memory);
/// @notice Quick lookup of whether an account has participated in a Market
/// @param account User account
/// @param market`FixedRateLoanMarket` contract
/// @return bool True if participated, false otherwise
function accountMarkets(address account, IFixedRateMarket market) external view returns(bool);
/// @notice Converts any local value into its value in USD using oracle feed price
/// @param token ERC20 token
/// @param amountLocal Amount denominated in terms of the ERC20 token
/// @return uint Amount in USD, scaled to 1e18
function localToUSD(IERC20 token, uint amountLocal) external view returns(uint);
/// @notice Converts any value in USD into its value in local using oracle feed price
/// @param token ERC20 token
/// @param valueUSD Amount in USD
/// @return uint Amount denominated in terms of the ERC20 token
function USDToLocal(IERC20 token, uint valueUSD) external view returns(uint);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface IQPriceOracle {
/// @notice Emitted when setting the DIA Oracle address
event SetDIAOracle(address DIAOracle);
/// @notice Converts any local value into its value in USD using oracle feed price
/// @param token ERC20 token
/// @param amountLocal Amount denominated in terms of the ERC20 token
/// @return uint Amount in USD
function localToUSD(IERC20 token, uint amountLocal) external view returns(uint);
/// @notice Converts any value in USD into its value in local using oracle feed price
/// @param token ERC20 token
/// @param valueUSD Amount in USD
/// @return uint Amount denominated in terms of the ERC20 token
function USDToLocal(IERC20 token, uint valueUSD) external view returns(uint);
/// @notice Convenience function for getting price feed from various oracles.
/// Returned prices should ALWAYS be normalized to eight decimal places.
/// @param underlyingToken Address of the underlying token
/// @param oracleFeed Address of the oracle feed
/// @return answer uint256, decimals uint8
function priceFeed(
IERC20 underlyingToken,
address oracleFeed
) external view returns(uint256, uint8);
/// @notice Get the address of the `QAdmin` contract
/// @return address Address of `QAdmin` contract
function qAdmin() external view returns(address);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
interface ITradingEmissionsQontroller {
/** ACCESS CONTROLLED FUNCTIONS **/
/// @notice Use the fees generated (in USD) as basis to calculate how much
/// token reward to disburse for trading volumes. Only `FixedRateMarket`
/// contracts may call this function.
/// @param borrower Address of the borrower
/// @param lender Address of the lender
/// @param feeUSD Fees generated (in USD, scaled to 1e18)
function updateRewards(address borrower, address lender, uint feeUSD) external;
/** USER INTERFACE **/
/// @notice Mint the unclaimed rewards to user and reset their claimable emissions
function claimEmissions() external;
/** VIEW FUNCTIONS **/
/// @notice Checks the amount of unclaimed trading rewards that the user can claim
/// @param account Address of the user
/// @return uint Amount of QODA token rewards the user may claim
function claimableEmissions(address account) external view returns(uint);
/// @notice Get the address of the `QAdmin` contract
/// @return address Address of `QAdmin` contract
function qAdmin() external view returns(address);
/// @notice Get the address of the `QodaERC20` contract
/// @return address Address of `QodaERC20` contract
function qodaERC20() external view returns(address);
function numPhases() external view returns(uint);
function currentPhase() external view returns(uint);
function totalAllocation() external view returns(uint);
function emissionsPhase(uint phase) external view returns(uint, uint, uint);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
import "@openzeppelin/contracts-upgradeable/access/IAccessControlUpgradeable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../libraries/QTypes.sol";
interface IQAdmin is IAccessControlUpgradeable {
/// @notice Emitted when a new FixedRateMarket is deployed
event CreateFixedRateMarket(address indexed marketAddress, address indexed tokenAddress, uint maturity);
/// @notice Emitted when existing FixedRateMarket is removed
event RemoveFixedRateMarket(address indexed marketAddress, address indexed tokenAddress, uint maturity);
/// @notice Emitted when a new `Asset` is added
event AddAsset(
address indexed tokenAddress,
bool isYieldBearing,
address oracleFeed,
uint collateralFactor,
uint marketFactor);
/// @notice Emitted when existing `Asset` is removed
event RemoveAsset(address indexed tokenAddress);
/// @notice Emitted when setting `_weth`
event SetWETH(address wethAddress);
/// @notice Emitted when setting `_qollateralManager`
event SetQollateralManager(address qollateralManagerAddress);
/// @notice Emitted when setting `_stakingEmissionsQontroller`
event SetStakingEmissionsQontroller(address stakingEmissionsQontrollerAddress);
/// @notice Emitted when setting `_tradingEmissionsQontroller`
event SetTradingEmissionsQontroller(address tradingEmissionsQontrollerAddress);
/// @notice Emitted when setting `_feeEmissionsQontroller`
event SetFeeEmissionsQontroller(address feeEmissionsQontrollerAddress);
/// @notice Emitted when setting `_veQoda`
event SetVeQoda(address veQodaAddress);
/// @notice Emitted when setting `_qodaLens`
event SetQodaLens(address qodaLensAddress);
/// @notice Emitted when setting `collateralFactor`
event SetCollateralFactor(address indexed tokenAddress, uint oldValue, uint newValue);
/// @notice Emitted when setting `marketFactor`
event SetMarketFactor(address indexed tokenAddress, uint oldValue, uint newValue);
/// @notice Emitted when setting `minQuoteSize`
event SetMinQuoteSize(address indexed tokenAddress, uint oldValue, uint newValue);
/// @notice Emitted when `_minCollateralRatioDefault` and `_initCollateralRatioDefault` get updated
event SetCollateralRatio(uint oldMinValue, uint oldInitValue, uint newMinValue, uint newInitValue);
/// @notice Emitted when `CreditFacility` gets updated
event SetCreditFacility(address account, bool oldEnabled, uint oldMinValue, uint oldInitValue, uint oldCreditValue, bool newEnabled, uint newMinValue, uint newInitValue, uint newCreditValue);
/// @notice Emitted when `_closeFactor` gets updated
event SetCloseFactor(uint oldValue, uint newValue);
/// @notice Emitted when `_repaymentGracePeriod` gets updated
event SetRepaymentGracePeriod(uint oldValue, uint newValue);
/// @notice Emitted when `_maturityGracePeriod` gets updated
event SetMaturityGracePeriod(uint oldValue, uint newValue);
/// @notice Emitted when `_liquidationIncentive` gets updated
event SetLiquidationIncentive(uint oldValue, uint newValue);
/// @notice Emitted when `_protocolFee` gets updated
event SetProtocolFee(uint oldValue, uint newValue);
/// @notice Emitted when pause state of all `FixedRateMarket` contract is changed
event SetMarketPaused(bool paused);
/// @notice Emitted when pause state of a particular contract is changed
event SetContractPaused(address contractAddr, bool paused);
/// @notice Emitted when pause state of a particular operation is changed
event SetOperationPaused(uint operationId, bool paused);
/** ADMIN FUNCTIONS **/
/// @notice Call upon initialization after deploying `QAdmin` contract
/// @param wethAddress Address of `WETH` contract of the network
function _setWETH(address wethAddress) external;
/// @notice Call upon initialization after deploying `QollateralManager` contract
/// @param qollateralManagerAddress Address of `QollateralManager` deployment
function _setQollateralManager(address qollateralManagerAddress) external;
/// @notice Call upon initialization after deploying `StakingEmissionsQontroller` contract
/// @param stakingEmissionsQontrollerAddress Address of `StakingEmissionsQontroller` deployment
function _setStakingEmissionsQontroller(address stakingEmissionsQontrollerAddress) external;
/// @notice Call upon initialization after deploying `TradingEmissionsQontroller` contract
/// @param tradingEmissionsQontrollerAddress Address of `TradingEmissionsQontroller` deployment
function _setTradingEmissionsQontroller(address tradingEmissionsQontrollerAddress) external;
/// @notice Call upon initialization after deploying `FeeEmissionsQontroller` contract
/// @param feeEmissionsQontrollerAddress Address of `FeeEmissionsQontroller` deployment
function _setFeeEmissionsQontroller(address feeEmissionsQontrollerAddress) external;
/// @notice Call upon initialization after deploying `veQoda` contract
/// @param veQodaAddress Address of `veQoda` deployment
function _setVeQoda(address veQodaAddress) external;
/// @notice Call upon initialization after deploying `QodaLens` contract
/// @param qodaLensAddress Address of `QodaLens` deployment
function _setQodaLens(address qodaLensAddress) external;
/// @notice Set credit facility for specified account
/// @param account_ account for credit facility adjustment
/// @param enabled_ If credit facility should be enabled
/// @param minCollateralRatio_ New minimum collateral ratio value
/// @param initCollateralRatio_ New initial collateral ratio value
/// @param creditLimit_ new credit limit in USD, scaled by 1e18
function _setCreditFacility(address account_, bool enabled_, uint minCollateralRatio_, uint initCollateralRatio_, uint creditLimit_) external;
/// @notice Admin function for adding new Assets. An Asset must be added before it
/// can be used as collateral or borrowed. Note: We can create functionality for
/// allowing borrows of a token but not using it as collateral by setting
/// `collateralFactor` to zero.
/// @param tokenAddress ERC20 token corresponding to the Asset
/// @param isYieldBearing True if token bears interest (eg aToken, cToken, mToken, etc)
/// @param underlying Address of the underlying token
/// @param oracleFeed Chainlink price feed address
/// @param collateralFactor 0.0 to 1.0 (scaled to 1e8) for discounting risky assets
/// @param marketFactor 0.0 to 1.0 (scaled to 1e8) for premium on risky borrows
function _addAsset(
address tokenAddress,
bool isYieldBearing,
address underlying,
address oracleFeed,
uint collateralFactor,
uint marketFactor
) external;
/// @notice Admin function for removing an asset
/// @param token ERC20 token corresponding to the Asset
function _removeAsset(IERC20 token) external;
/// @notice Adds a new `FixedRateMarket` contract into the internal mapping of
/// whitelisted market addresses
/// @param marketAddress New `FixedRateMarket` contract address
/// @param protocolFee_ Corresponding protocol fee in basis points
/// @param minQuoteSize_ Size in PV terms, local currency
function _addFixedRateMarket(
address marketAddress,
uint protocolFee_,
uint minQuoteSize_
) external;
/// @notice Update the `collateralFactor` for a given `Asset`
/// @param token ERC20 token corresponding to the Asset
/// @param collateralFactor 0.0 to 1.0 (scaled to 1e8) for discounting risky assets
function _setCollateralFactor(IERC20 token, uint collateralFactor) external;
/// @notice Update the `marketFactor` for a given `Asset`
/// @param token Address of the token corresponding to the Asset
/// @param marketFactor 0.0 to 1.0 (scaled to 1e8) for discounting risky assets
function _setMarketFactor(IERC20 token, uint marketFactor) external;
/// @notice Set the minimum quote size for a particular `FixedRateMarket`
/// @param marketAddress Address of the `FixedRateMarket` contract
/// @param minQuoteSize_ Size in PV terms, local currency
function _setMinQuoteSize(address marketAddress, uint minQuoteSize_) external;
/// @notice Set the global minimum and initial collateral ratio
/// @param minCollateralRatio_ New global minimum collateral ratio value
/// @param initCollateralRatio_ New global initial collateral ratio value
function _setCollateralRatio(uint minCollateralRatio_, uint initCollateralRatio_) external;
/// @notice Set the global close factor
/// @param closeFactor_ New close factor value
function _setCloseFactor(uint closeFactor_) external;
/// @notice Set the global repayment grace period
/// @param repaymentGracePeriod_ New repayment grace period
function _setRepaymentGracePeriod(uint repaymentGracePeriod_) external;
/// @notice Set the global maturity grace period
/// @param maturityGracePeriod_ New maturity grace period
function _setMaturityGracePeriod(uint maturityGracePeriod_) external;
/// @notice Set the global liquidation incetive
/// @param liquidationIncentive_ New liquidation incentive value
function _setLiquidationIncentive(uint liquidationIncentive_) external;
/// @notice Set the global annualized protocol fees for each market in basis points
/// @param marketAddress Address of the `FixedRateMarket` contract
/// @param protocolFee_ New protocol fee value (scaled to 1e4)
function _setProtocolFee(address marketAddress, uint protocolFee_) external;
/// @notice Set the global threshold in USD for protocol fee transfer
/// @param thresholdUSD_ New threshold USD value (scaled by 1e6)
function _setThresholdUSD(uint thresholdUSD_) external;
/// @notice Pause/unpause all markets for admin
/// @param paused Boolean to indicate if all markets should be paused
function _setMarketsPaused(bool paused) external;
/// @notice Pause/unpause specified list of contracts for admin
/// @param contractsAddr List of contract addresses to pause/unpause
/// @param paused Boolean to indicate if specified contract should be paused
function _setContractPaused(address[] memory contractsAddr, bool paused) external;
/// @notice Pause/unpause specified contract for admin
/// @param contractAddr Address of contract to pause/unpause
/// @param paused Boolean to indicate if specified contract should be paused
function _setContractPaused(address contractAddr, bool paused) external;
/// @notice Pause/unpause specified list of operations for admin
/// @param operationIds List of ids for operation to pause/unpause
/// @param paused Boolean to indicate if specified operation should be paused
function _setOperationPaused(uint[] memory operationIds, bool paused) external;
/// @notice Pause/unpause specified operation for admin
/// @param operationId Id for operation to pause/unpause
/// @param paused Boolean to indicate if specified operation should be paused
function _setOperationPaused(uint operationId, bool paused) external;
/** VIEW FUNCTIONS **/
function ADMIN_ROLE() external view returns(bytes32);
function MARKET_ROLE() external view returns(bytes32);
function MINTER_ROLE() external view returns(bytes32);
function VETOKEN_ROLE() external view returns(bytes32);
/// @notice Get the address of the `WETH` contract
function WETH() external view returns(address);
/// @notice Get the address of the `QollateralManager` contract
function qollateralManager() external view returns(address);
/// @notice Get the address of the `QPriceOracle` contract
function qPriceOracle() external view returns(address);
/// @notice Get the address of the `StakingEmissionsQontroller` contract
function stakingEmissionsQontroller() external view returns(address);
/// @notice Get the address of the `TradingEmissionsQontroller` contract
function tradingEmissionsQontroller() external view returns(address);
/// @notice Get the address of the `FeeEmissionsQontroller` contract
function feeEmissionsQontroller() external view returns(address);
/// @notice Get the address of the `veQoda` contract
function veQoda() external view returns(address);
/// @notice Get the address of the `QodaLens` contract
function qodaLens() external view returns(address);
/// @notice Get the credit limit with associated address, scaled by 1e18
function creditLimit(address account_) external view returns(uint);
/// @notice Gets the `Asset` mapped to the address of a ERC20 token
/// @param token ERC20 token
/// @return QTypes.Asset Associated `Asset`
function assets(IERC20 token) external view returns(QTypes.Asset memory);
/// @notice Get all enabled `Asset`s
/// @return address[] iterable list of enabled `Asset`s
function allAssets() external view returns(address[] memory);
/// @notice Gets the `oracleFeed` associated with a ERC20 token
/// @param token ERC20 token
/// @return address Address of the oracle feed
function oracleFeed(IERC20 token) external view returns(address);
/// @notice Gets the `CollateralFactor` associated with a ERC20 token
/// @param token ERC20 token
/// @return uint Collateral Factor, scaled by 1e8
function collateralFactor(IERC20 token) external view returns(uint);
/// @notice Gets the `MarketFactor` associated with a ERC20 token
/// @param token ERC20 token
/// @return uint Market Factor, scaled by 1e8
function marketFactor(IERC20 token) external view returns(uint);
/// @notice Gets the `maturities` associated with a ERC20 token
/// @param token ERC20 token
/// @return uint[] array of UNIX timestamps (in seconds) of the maturity dates
function maturities(IERC20 token) external view returns(uint[] memory);
/// @notice Get the MToken market corresponding to any underlying ERC20
/// tokenAddress => mTokenAddress
function underlyingToMToken(IERC20 token) external view returns(address);
/// @notice Gets the address of the `FixedRateMarket` contract
/// @param token ERC20 token
/// @param maturity UNIX timestamp of the maturity date
/// @return address Address of `FixedRateMarket` contract
function fixedRateMarkets(IERC20 token, uint maturity) external view returns(address);
/// @notice Check whether an address is a valid FixedRateMarket address.
/// Can be used for checks for inter-contract admin/restricted function call.
/// @param marketAddress Address of the `FixedRateMarket` contract
/// @return bool True if valid false otherwise
function isMarketEnabled(address marketAddress) external view returns(bool);
function minQuoteSize(address marketAddress) external view returns(uint);
function minCollateralRatio() external view returns(uint);
function minCollateralRatio(address account) external view returns(uint);
function initCollateralRatio() external view returns(uint);
function initCollateralRatio(address account) external view returns(uint);
function closeFactor() external view returns(uint);
function repaymentGracePeriod() external view returns(uint);
function maturityGracePeriod() external view returns(uint);
function liquidationIncentive() external view returns(uint);
/// @notice Annualized protocol fee in basis points, scaled by 1e4
function protocolFee(address marketAddress) external view returns(uint);
/// @notice threshold in USD where protocol fee from each market will be transferred into `FeeEmissionsQontroller`
/// once this amount is reached, scaled by 1e6
function thresholdUSD() external view returns(uint);
/// @notice Boolean to indicate if all markets are paused
function marketsPaused() external view returns(bool);
/// @notice Boolean to indicate if specified contract address is paused
function contractPaused(address contractAddr) external view returns(bool);
/// @notice Boolean to indicate if specified operation is paused
function operationPaused(uint operationId) external view returns(bool);
/// @notice Check if given combination of contract address and operation should be allowed
function isPaused(address contractAddr, uint operationId) external view returns(bool);
/// @notice 2**256 - 1
function UINT_MAX() external pure returns(uint);
/// @notice Generic mantissa corresponding to ETH decimals
function MANTISSA_DEFAULT() external pure returns(uint);
/// @notice Mantissa for USD
function MANTISSA_USD() external pure returns(uint);
/// @notice Mantissa for collateral ratio
function MANTISSA_COLLATERAL_RATIO() external pure returns(uint);
/// @notice `assetFactor` and `marketFactor` have up to 8 decimal places precision
function MANTISSA_FACTORS() external pure returns(uint);
/// @notice Basis points have 4 decimal place precision
function MANTISSA_BPS() external pure returns(uint);
/// @notice Staked Qoda has 6 decimal place precision
function MANTISSA_STAKING() external pure returns(uint);
/// @notice `collateralFactor` cannot be above 1.0
function MAX_COLLATERAL_FACTOR() external pure returns(uint);
/// @notice `marketFactor` cannot be above 1.0
function MAX_MARKET_FACTOR() external pure returns(uint);
/// @notice version number of this contract, will be bumped upon contractual change
function VERSION_NUMBER() external pure returns(string memory);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
import "../libraries/QTypes.sol";
interface IQuoteManager {
/// @notice Emitted when an account creates a new `Quote`
event CreateQuote(
uint8 indexed side,
address indexed quoter,
uint64 id,
uint8 quoteType,
uint64 APR,
uint cashflow
);
/// @notice Emitted when a `Quote` is filled and/or cancelled
event RemoveQuote(
address indexed quoter,
bool isUserCanceled,
uint8 side,
uint64 id,
uint8 quoteType,
uint64 APR,
uint cashflow,
uint filled
);
/** USER INTERFACE **/
/// @notice Creates a new `Quote` and adds it to the `OrderbookSide` linked list by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param quoter Account of the Quoter
/// @param quoteType 0 for PV+APR, 1 for FV+APR
/// @param APR In decimal form scaled by 1e4 (ex. 1052 = 10.52%)
/// @param cashflow Can be PV or FV depending on `quoteType`
function createQuote(uint8 side, address quoter, uint8 quoteType, uint64 APR, uint cashflow) external;
/// @notice Cancel `Quote` by id. Note this is a O(1) operation
/// since `OrderbookSide` uses hashmaps under the hood. However, it is
/// O(n) against the array of `Quote` ids by account so we should ensure
/// that array should not grow too large in practice.
/// @param isUserCanceled True if user actively canceled `Quote`, false otherwise
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param quoter Address of the `Quoter`
/// @param id Id of the `Quote`
function cancelQuote(bool isUserCanceled, uint8 side, address quoter, uint64 id) external;
/// @notice Fill existing `Quote` by side and id
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param id Id of the `Quote`
/// @param amount Amount to be filled
function fillQuote(uint8 side, uint64 id, uint amount) external;
/** VIEW FUNCTIONS **/
/// @notice Get the address of the `QAdmin`
/// @return address
function qAdmin() external view returns(address);
/// @notice Get the address of the `FixedRateMarket`
/// @return address
function fixedRateMarket() external view returns(address);
/// @notice Get the minimum quote size for this market
/// @return uint Minimum quote size, in PV terms, local currency
function minQuoteSize() external view returns(uint);
/// @notice Get the linked list pointer top of book for `Quote` by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return uint64 id of top of book `Quote`
function getQuoteHeadId(uint8 side) external view returns(uint64);
/// @notice Get the top of book for `Quote` by side
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return QTypes.Quote head `Quote`
function getQuoteHead(uint8 side) external view returns(QTypes.Quote memory);
/// @notice Get the `Quote` for the given `side` and `id`
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param id Id of `Quote`
/// @return QTypes.Quote `Quote` associated with the id
function getQuote(uint8 side, uint64 id) external view returns(QTypes.Quote memory);
/// @notice Get all live `Quote` id's by `account` and `side`
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param account Account to query
/// @return uint[] Unsorted array of borrow `Quote` id's
function getAccountQuotes(uint8 side, address account) external view returns(uint64[] memory);
/// @notice Get the number of active `Quote`s by `side` in the orderbook
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @return uint Number of `Quote`s
function getNumQuotes(uint8 side) external view returns(uint);
/// @notice Checks whether a `Quote` is still valid. Importantly, for lenders,
/// we need to check if the `Quoter` currently has enough balance to perform
/// a lend, since the `Quoter` can always remove balance/allowance immediately
/// after creating the `Quote`. Likewise, for borrowers, we need to check if
/// the `Quoter` has enough collateral to perform a borrow, since the `Quoter`
/// can always remove collateral immediately after creating the `Quote`.
/// @param side 0 for borrow `Quote`, 1 for lend `Quote`
/// @param quote `Quote` to check for validity
/// @return bool True if valid false otherwise
function isQuoteValid(uint8 side, QTypes.Quote memory quote) external view returns(bool);
/// @notice Get the PV of a cashflow amount based on the `quoteType`
/// @param quoteType 0 for PV, 1 for FV
/// @param APR In decimal form scaled by 1e4 (ex. 10.52% = 1052)
/// @param sTime PV start time
/// @param eTime FV end time
/// @param amount Value to be PV'ed
/// @return uint PV of the `amount`
function getPV(
uint8 quoteType,
uint64 APR,
uint amount,
uint sTime,
uint eTime
) external view returns(uint);
/// @notice Get the FV of a cashflow amount based on the `quoteType`
/// @param quoteType 0 for PV, 1 for FV
/// @param APR In decimal form scaled by 1e4 (ex. 10.52% = 1052)
/// @param sTime PV start time
/// @param eTime FV end time
/// @param amount Value to be FV'ed
/// @return uint FV of the `amount`
function getFV(
uint8 quoteType,
uint64 APR,
uint amount,
uint sTime,
uint eTime
) external view returns(uint);
}//SPDX-License-Identifier: NONE
pragma solidity ^0.8.9;
import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
/// @title Interface for WETH9
interface IWETH is IERC20 {
/// @notice Deposit ether to get wrapped ether
function deposit() external payable;
/// @notice Withdraw wrapped ether to get ether
function withdraw(uint256) external;
}// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
library CustomErrors {
error QA_OnlyAdmin();
error QM_OnlyAdmin();
error FRM_OnlyAdmin();
error SEQ_OnlyAdmin();
error SOS_OnlyAdmin();
error STS_OnlyAdmin();
error TV_OnlyAdmin();
error QPO_OnlyAdmin();
error FEQ_OnlyMarket();
error QA_OnlyMarket();
error QM_OnlyMarket();
error QUM_OnlyMarket();
error TEQ_OnlyMarket();
error SOS_OnlyMarket();
error STS_OnlyMarket();
error SS_OnlyMarket();
error QE_OnlyMinter();
error FEQ_OnlyVeToken();
error QA_OnlyVeToken();
error SEQ_OnlyVeToken();
error QA_AssetExist();
error QA_AssetNotExist();
error QA_AssetNotEnabled();
error QA_AssetNotSupported();
error QM_AssetNotSupported();
error QPO_AssetNotSupported();
error QA_MarketExist();
error QA_MarketNotExist();
error QA_InvalidCollateralFactor();
error QA_InvalidMarketFactor();
error QA_InvalidAddress();
error QA_MinCollateralRatioNotGreaterThanInit();
error QA_OverThreshold(uint actual, uint expected);
error QA_UnderThreshold(uint actual, uint expected);
error QM_OperationPaused(uint operationId);
error FRM_OperationPaused(uint operationId);
error QUM_OperationPaused(uint operationId);
error SEQ_OperationPaused(uint operationId);
error TEQ_OperationPaused(uint operationId);
error FEQ_OperationPaused(uint operationId);
error VQ_OperationPaused(uint operationId);
error FRM_ReentrancyDetected();
error QM_ReentrancyDetected();
error FRM_AmountZero();
error SEQ_AmountZero();
error QM_ZeroTransferAmount();
error QM_ZeroDepositAmount();
error SEQ_ZeroDepositAmount();
error QM_ZeroWithdrawAmount();
error FRM_ZeroRedeemAmount();
error TEQ_ZeroRewardAmount();
error VQ_ZeroStakeAmount();
error VQ_ZeroUnstakeAmount();
error FRM_InsufficientAllowance();
error QUM_InsufficientAllowance();
error FRM_InsufficientBalance();
error QUM_InsufficientBalance();
error VQ_InsufficientBalance();
error TT_InsufficientBalance();
error QM_InsufficientCollateralBalance();
error TT_InsufficientEth();
error QM_WithdrawMoreThanCollateral();
error QM_MTokenUnsupported();
error FRM_CannotRedeemEarly();
error FRM_NotLiquidatable();
error QM_NotEnoughCollateral();
error FRM_NotEnoughCollateral();
error FRM_BorrowsMoreThanLends();
error FRM_AmountLessThanProtocolFee();
error FRM_MarketExpired();
error FRM_InvalidSide();
error QUM_InvalidSide();
error QL_InvalidSide();
error QUM_InvalidQuoteType();
error QL_InvalidQuoteType();
error FRM_InvalidAPR();
error FRM_InvalidCounterparty();
error FRM_InvalidMaturity();
error QM_InvalidWithdrawal(uint actual, uint expected);
error QUM_InvalidFillAmount();
error QUM_InvalidCashflowSize();
error INT_InvalidTimeInterval();
error FRM_AmountExceedsRedeemable();
error FRM_AmountExceedsBorrows();
error FRM_MaxBorrowExceeded();
error QUM_MaxBorrowExceeded();
error QL_MaxBorrowExceeded();
error QUM_QuoteNotFound();
error QUM_QuoteSizeTooSmall();
error QPO_ExchangeRateOutOfBound();
error SEQ_LengthMismatch();
error TEQ_LengthMismatch();
error SEQ_InvokeMoreThanOnce();
error VQ_TransferDisabled();
error QM_UnsuccessfulEthTransfer();
error FRM_UnsuccessfulEthTransfer();
error MT_UnsuccessfulEthTransfer();
error TT_UnsuccessfulEthTransfer();
error FRM_EthOperationNotPermitted();
error FEQ_ContractInitializationProblem();
error FEQ_Unauthorized();
error QUM_Unauthorized();
error QPO_Already_Set();
}// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
import "./CustomErrors.sol";
library Interest {
function PVToFV(
uint64 APR,
uint PV,
uint sTime,
uint eTime,
uint mantissaAPR
) internal pure returns(uint){
if (sTime >= eTime) {
revert CustomErrors.INT_InvalidTimeInterval();
}
// Seconds per 365-day year (60 * 60 * 24 * 365)
uint year = 31536000;
// elapsed time from now to maturity
uint elapsed = eTime - sTime;
uint interest = PV * APR * elapsed / mantissaAPR / year;
return PV + interest;
}
function FVToPV(
uint64 APR,
uint FV,
uint sTime,
uint eTime,
uint mantissaAPR
) internal pure returns(uint){
if (sTime >= eTime) {
revert CustomErrors.INT_InvalidTimeInterval();
}
// Seconds per 365-day year (60 * 60 * 24 * 365)
uint year = 31536000;
// elapsed time from now to maturity
uint elapsed = eTime - sTime;
uint num = FV * mantissaAPR * year;
uint denom = mantissaAPR * year + APR * elapsed;
return num / denom;
}
}//SPDX-License-Identifier: NONE
pragma solidity ^0.8.9;
import "./QTypes.sol";
library LinkedList {
struct OrderbookSide {
uint64 head;
uint64 tail;
uint64 idCounter;
uint64 length;
mapping(uint64 => QTypes.Quote) quotes;
}
/// @notice Get the `Quote` with id `id`
function get(OrderbookSide storage self, uint64 id) internal view returns(QTypes.Quote memory){
QTypes.Quote memory quote = self.quotes[id];
return quote;
}
/// @notice Insert a new `Quote` as the new head of the linked list
/// @return uint64 Id of the new `Quote`
function addHead(
OrderbookSide storage self,
address quoter,
uint8 quoteType,
uint64 APR,
uint cashflow
) internal returns(uint64){
// Create a new unlinked object representing the new head
QTypes.Quote memory newQuote = createQuote(self, quoter, quoteType, APR, cashflow);
// Link `newQuote` before the current head
link(self, newQuote.id, self.head);
// Set the head pointer to `newQuote`
setHeadId(self, newQuote.id);
if(self.tail == 0) {
// `OrderbookSide` is currently empty, so set tail = head
setTailId(self, newQuote.id);
}
return newQuote.id;
}
/// @notice Insert a new `Quote` as the tail of the linked list
/// @return uint64 Id of the new `Quote`
function addTail(
OrderbookSide storage self,
address quoter,
uint8 quoteType,
uint64 APR,
uint cashflow
) internal returns(uint64) {
if (self.head == 0) {
// `OrderbookSide` is currently empty, so set head = tail
return addHead(self, quoter, quoteType, APR, cashflow);
} else {
// Create a new unlinked object representing the new tail
QTypes.Quote memory newQuote = createQuote(self, quoter, quoteType, APR, cashflow);
// Link `newQuote` after the current tail
link(self, self.tail, newQuote.id);
// Set the tail pointer to `newQuote`
setTailId(self, newQuote.id);
return newQuote.id;
}
}
/// @notice Remove the `Quote` with id `id` from the linked list
function remove(OrderbookSide storage self, uint64 id) internal {
QTypes.Quote memory quoteToRemove = self.quotes[id];
if(self.head == id && self.tail == id) {
// `OrderbookSide` only has one element. Reset both head and tail pointers
setHeadId(self, 0);
setTailId(self, 0);
} else if (self.head == id) {
// `quoteToRemove` is the current head, so set the next item in the linked list to be head
setHeadId(self, quoteToRemove.next);
self.quotes[quoteToRemove.next].prev = 0;
} else if (self.tail == id) {
// `quoteToRemove` is the current tail, so set the prev item in the linked list to be tail
setTailId(self, quoteToRemove.prev);
self.quotes[quoteToRemove.prev].next = 0;
} else {
// Link the `Quote`s before and after `quoteToRemove` together
link(self, quoteToRemove.prev, quoteToRemove.next);
}
// Ready to delete `quoteToRemove`
delete self.quotes[quoteToRemove.id];
// Decrement the length of the `OrderbookSide`
self.length--;
}
/// @notice Insert a new `Quote` after the `Quote` with id `prev`
/// @return uint64 Id of the new `Quote`
function insertAfter(
OrderbookSide storage self,
uint64 prev,
address quoter,
uint8 quoteType,
uint64 APR,
uint cashflow
) internal returns(uint64){
if(prev == self.tail) {
// Prev element is the tail, make this `Quote` the new tail
return addTail(self, quoter, quoteType, APR, cashflow);
} else {
// Create a new unlinked object representing the new `Quote`
QTypes.Quote memory newQuote = createQuote(self, quoter, quoteType, APR, cashflow);
// Get the `Quote`s before and after `newQuote`
QTypes.Quote memory prevQuote = self.quotes[prev];
QTypes.Quote memory nextQuote = self.quotes[prevQuote.next];
// Insert the new `Quote` between `prevQuote` and `nextQuote`
link(self, newQuote.id, nextQuote.id);
link(self, prevQuote.id, newQuote.id);
return newQuote.id;
}
}
/// @notice Insert a new `Quote` before the `Quote` with id `next`
/// @return uint64 Id of the new `Quote`
function insertBefore(
OrderbookSide storage self,
uint64 next,
address quoter,
uint8 quoteType,
uint64 APR,
uint cashflow
) internal returns(uint64){
if(next == self.head) {
// Next element is the head, make this `Quote` the new head
return addHead(self, quoter, quoteType, APR, cashflow);
} else {
// inserting before `next` is equivalent to inserting after `next.prev`
return insertAfter(self, self.quotes[next].prev, quoter, quoteType, APR, cashflow);
}
}
/// @notice Update the pointer to head of the linked list
function setHeadId(OrderbookSide storage self, uint64 head) internal {
self.head = head;
}
/// @notice Update the pointer to tail of the linked list
function setTailId(OrderbookSide storage self, uint64 tail) internal {
self.tail = tail;
}
/// @notice Create a new unlinked `Quote`
function createQuote(
OrderbookSide storage self,
address quoter,
uint8 quoteType,
uint64 APR,
uint cashflow
) internal returns(QTypes.Quote memory) {
// Increment the counter for new id's.
// Note this means non-empty linked lists start with id = 1
self.idCounter = self.idCounter + 1;
// Create a new unlinked `Quote` with the latest `idCounter`
QTypes.Quote memory newQuote = QTypes.Quote(self.idCounter, 0, 0, quoter, quoteType, APR, cashflow, 0);
// Add the `Quote` to the internal mapping of `Quote`s
self.quotes[newQuote.id] = newQuote;
// Increment the length of the `OrderbookSide`
self.length++;
return newQuote;
}
/// @notice Link two `Quote`s together
function link(
OrderbookSide storage self,
uint64 prev,
uint64 next
) internal {
self.quotes[prev].next = next;
self.quotes[next].prev = prev;
}
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.9;
library QTypes {
/// @notice Contains all the details of an Asset. Assets must be defined
/// before they can be used as collateral.
/// @member isEnabled True if an asset is defined, false otherwise
/// @member isYieldBearing True if token bears interest (eg aToken, cToken, mToken, etc)
/// @member underlying Address of the underlying token
/// @member oracleFeed Address of the corresponding chainlink oracle feed
/// @member collateralFactor 0.0 to 1.0 (scaled to 1e8) for discounting risky assets
/// @member marketFactor 0.0 1.0 for premium on risky borrows
/// @member maturities Iterable storage for all enabled maturities
struct Asset {
bool isEnabled;
bool isYieldBearing;
address underlying;
address oracleFeed;
uint collateralFactor;
uint marketFactor;
uint[] maturities;
}
/// @notice Contains all the fields of a created Quote
/// @param id ID of the quote
/// @param next Next quote in the list
/// @param prev Previous quote in the list
/// @param quoter Account of the Quoter
/// @param quoteType 0 for PV+APR, 1 for FV+APR
/// @param APR In decimal form scaled by 1e4 (ex. 10.52% = 1052)
/// @param cashflow Can be PV or FV depending on `quoteType`
/// @param filled Amount quote has got filled partially
struct Quote {
uint64 id;
uint64 next;
uint64 prev;
address quoter;
uint8 quoteType;
uint64 APR;
uint cashflow;
uint filled;
}
/// @notice Contains all the configurations customizable to an address
/// @member enabled If config for an address is enabled. When enabled is false, credit limit is infinite even if value is 0
/// @member minCollateralRatio If collateral ratio falls below `_minCollateralRatio`, it is subject to liquidation. Scaled by 1e8
/// @member initCollateralRatio When initially taking a loan, collateral ratio must be higher than this. `initCollateralRatio` should always be higher than `minCollateralRatio`. Scaled by 1e8
/// @member creditLimit Allowed limit in virtual USD for each address to do uncollateralized borrow, scaled by 1e18
struct CreditFacility {
bool enabled;
uint minCollateralRatio;
uint initCollateralRatio;
uint creditLimit;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20Upgradeable.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20MetadataUpgradeable is IERC20Upgradeable {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControlUpgradeable {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}{
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"metadata": {
"useLiteralContent": true
},
"libraries": {}
}Contract Security Audit
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Contract ABI
API[{"inputs":[],"name":"FRM_AmountExceedsBorrows","type":"error"},{"inputs":[],"name":"FRM_AmountExceedsRedeemable","type":"error"},{"inputs":[],"name":"FRM_AmountLessThanProtocolFee","type":"error"},{"inputs":[],"name":"FRM_AmountZero","type":"error"},{"inputs":[],"name":"FRM_BorrowsMoreThanLends","type":"error"},{"inputs":[],"name":"FRM_CannotRedeemEarly","type":"error"},{"inputs":[],"name":"FRM_EthOperationNotPermitted","type":"error"},{"inputs":[],"name":"FRM_InsufficientAllowance","type":"error"},{"inputs":[],"name":"FRM_InsufficientBalance","type":"error"},{"inputs":[],"name":"FRM_InvalidAPR","type":"error"},{"inputs":[],"name":"FRM_InvalidCounterparty","type":"error"},{"inputs":[],"name":"FRM_InvalidMaturity","type":"error"},{"inputs":[],"name":"FRM_InvalidSide","type":"error"},{"inputs":[],"name":"FRM_MarketExpired","type":"error"},{"inputs":[],"name":"FRM_MaxBorrowExceeded","type":"error"},{"inputs":[],"name":"FRM_NotEnoughCollateral","type":"error"},{"inputs":[],"name":"FRM_NotLiquidatable","type":"error"},{"inputs":[],"name":"FRM_OnlyAdmin","type":"error"},{"inputs":[{"internalType":"uint256","name":"operationId","type":"uint256"}],"name":"FRM_OperationPaused","type":"error"},{"inputs":[],"name":"FRM_ReentrancyDetected","type":"error"},{"inputs":[],"name":"FRM_UnsuccessfulEthTransfer","type":"error"},{"inputs":[],"name":"FRM_ZeroRedeemAmount","type":"error"},{"inputs":[],"name":"INT_InvalidTimeInterval","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint8","name":"quoteSide","type":"uint8"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"totalExecutedPV","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"totalExecutedFV","type":"uint256"}],"name":"ExecMarketOrder","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint8","name":"quoteSide","type":"uint8"},{"indexed":true,"internalType":"address","name":"borrower","type":"address"},{"indexed":true,"internalType":"address","name":"lender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountPV","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amountFV","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"feeIncurred","type":"uint256"},{"indexed":false,"internalType":"uint64","name":"APR","type":"uint64"}],"name":"FixedRateLoan","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"borrower","type":"address"},{"indexed":true,"internalType":"address","name":"liquidator","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"collateralTokenAddr","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"LiquidateBorrow","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"RedeemQTokens","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"borrower","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"bool","name":"withQTokens","type":"bool"}],"name":"RepayBorrow","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"quoteManagerAddress","type":"address"}],"name":"SetQuoteManager","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"quoteManagerAddress","type":"address"}],"name":"_setQuoteManager","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"accountBorrows","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender"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0xAf0a439fBF32372960689763b4F02f504c2aAF7e
Net Worth in USD
$0.00
Net Worth in GLMR
0
Multichain Portfolio | 35 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.