Contract Name:
LoanTokenLogicStandard
Contract Source Code:
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity 0.5.17;
pragma experimental ABIEncoderV2;
import "AdvancedToken.sol";
import "StorageExtension.sol";
import "IBZx.sol";
import "IPriceFeeds.sol";
contract LoanTokenLogicStandard is AdvancedToken, StorageExtension {
using SafeMath for uint256;
using SignedSafeMath for int256;
//// CONSTANTS ////
uint256 public constant VERSION = 7;
//address internal constant arbitraryCaller = 0x000F400e6818158D541C3EBE45FE3AA0d47372FF; // mainnet
//address internal constant arbitraryCaller = 0x81e7dddFAD37E6FAb0eccE95f0B508fd40996e6d; // bsc
//address internal constant arbitraryCaller = 0x81e7dddFAD37E6FAb0eccE95f0B508fd40996e6d; // polygon
address internal constant arbitraryCaller = 0x01207468F48822f8535BC96D1Cf18EddDE4A2392; // arbitrum
//address public constant bZxContract = 0xD8Ee69652E4e4838f2531732a46d1f7F584F0b7f; // mainnet
//address public constant wethToken = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; // mainnet
//address public constant bZxContract = 0x5cfba2639a3db0D9Cc264Aa27B2E6d134EeA486a; // kovan
//address public constant wethToken = 0xd0A1E359811322d97991E03f863a0C30C2cF029C; // kovan
//address public constant bZxContract = 0xD154eE4982b83a87b0649E5a7DDA1514812aFE1f; // bsc
//address public constant wethToken = 0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c; // bsc
//address public constant bZxContract = 0x059D60a9CEfBc70b9Ea9FFBb9a041581B1dFA6a8; // polygon
//address public constant wethToken = 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270; // polygon
address public constant bZxContract = 0x37407F3178ffE07a6cF5C847F8f680FEcf319FAB; // arbitrum
address public constant wethToken = 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1; // arbitrum
bytes32 internal constant iToken_ProfitSoFar = 0x37aa2b7d583612f016e4a4de4292cb015139b3d7762663d06a53964912ea2fb6; // keccak256("iToken_ProfitSoFar")
bytes32 internal constant iToken_LowerAdminAddress = 0x7ad06df6a0af6bd602d90db766e0d5f253b45187c3717a0f9026ea8b10ff0d4b; // keccak256("iToken_LowerAdminAddress")
bytes32 internal constant iToken_LowerAdminContract = 0x34b31cff1dbd8374124bd4505521fc29cab0f9554a5386ba7d784a4e611c7e31; // keccak256("iToken_LowerAdminContract")
constructor(
address _newOwner)
public
{
transferOwnership(_newOwner);
}
function()
external
{
revert("fallback not allowed");
}
/* Public functions */
function mint(
address receiver,
uint256 depositAmount)
external
nonReentrant
returns (uint256) // mintAmount
{
return _mintToken(
receiver,
depositAmount
);
}
function burn(
address receiver,
uint256 burnAmount)
external
nonReentrant
returns (uint256 loanAmountPaid)
{
loanAmountPaid = _burnToken(
burnAmount
);
if (loanAmountPaid != 0) {
_safeTransfer(loanTokenAddress, receiver, loanAmountPaid, "5");
}
}
function flashBorrow(
uint256 borrowAmount,
address borrower,
address target,
string calldata signature,
bytes calldata data)
external
payable
nonReentrant
pausable
returns (bytes memory)
{
require(borrowAmount != 0, "38");
_settleInterest(0);
// save before balances
uint256 beforeEtherBalance = address(this).balance.sub(msg.value);
uint256 beforeAssetsBalance = _underlyingBalance()
.add(_totalAssetBorrowStored());
// lock totalAssetSupply for duration of flash loan
_flTotalAssetSupply = beforeAssetsBalance;
// transfer assets to calling contract
_safeTransfer(loanTokenAddress, borrower, borrowAmount, "39");
emit FlashBorrow(borrower, target, loanTokenAddress, borrowAmount);
bytes memory callData;
if (bytes(signature).length == 0) {
callData = data;
} else {
callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);
}
// arbitrary call
(bool success, bytes memory returnData) = arbitraryCaller.call.value(msg.value)(
abi.encodeWithSelector(
0xde064e0d, // sendCall(address,bytes)
target,
callData
)
);
require(success, "call failed");
// unlock totalAssetSupply
_flTotalAssetSupply = 0;
// pay flash borrow fees
IBZx(bZxContract).payFlashBorrowFees(
borrower,
borrowAmount,
flashBorrowFeePercent
);
// verifies return of flash loan
require(
address(this).balance >= beforeEtherBalance &&
_underlyingBalance()
.add(_totalAssetBorrowStored()) >= beforeAssetsBalance,
"40"
);
return returnData;
}
function borrow(
bytes32 loanId, // 0 if new loan
uint256 withdrawAmount,
uint256 initialLoanDuration, // duration in seconds
uint256 collateralTokenSent, // if 0, loanId must be provided; any ETH sent must equal this value
address collateralTokenAddress, // if address(0), this means ETH and ETH must be sent with the call or loanId must be provided
address borrower,
address receiver,
bytes memory /*loanDataBytes*/) // arbitrary order data
public
payable
nonReentrant
returns (IBZx.LoanOpenData memory)
{
return _borrow(
loanId,
withdrawAmount,
initialLoanDuration,
collateralTokenSent,
collateralTokenAddress,
borrower,
receiver,
""
);
}
// Called to borrow and immediately get into a position
function marginTrade(
bytes32 loanId, // 0 if new loan
uint256 leverageAmount,
uint256 loanTokenSent,
uint256 collateralTokenSent,
address collateralTokenAddress,
address trader,
bytes memory loanDataBytes) // arbitrary order data
public
payable
nonReentrant
returns (IBZx.LoanOpenData memory)
{
return _marginTrade(
loanId,
leverageAmount,
loanTokenSent,
collateralTokenSent,
collateralTokenAddress,
trader,
loanDataBytes
);
}
function transfer(
address _to,
uint256 _value)
external
returns (bool)
{
return _internalTransferFrom(
msg.sender,
_to,
_value,
uint256(-1)
);
}
function transferFrom(
address _from,
address _to,
uint256 _value)
external
returns (bool)
{
return _internalTransferFrom(
_from,
_to,
_value,
allowed[_from][msg.sender]
/*IBZx(bZxContract).isLoanPool(msg.sender) ?
uint256(-1) :
allowed[_from][msg.sender]*/
);
}
function _internalTransferFrom(
address _from,
address _to,
uint256 _value,
uint256 _allowanceAmount)
internal
returns (bool)
{
if (_allowanceAmount != uint256(-1)) {
allowed[_from][msg.sender] = _allowanceAmount.sub(_value, "14");
}
require(_to != address(0), "15");
uint256 _balancesFrom = balances[_from];
uint256 _balancesFromNew = _balancesFrom
.sub(_value, "16");
balances[_from] = _balancesFromNew;
uint256 _balancesTo = balances[_to];
uint256 _balancesToNew = _balancesTo
.add(_value);
balances[_to] = _balancesToNew;
// handle checkpoint update
uint256 _currentPrice = tokenPrice();
_updateCheckpoints(
_from,
_balancesFrom,
_balancesFromNew,
_currentPrice
);
_updateCheckpoints(
_to,
_balancesTo,
_balancesToNew,
_currentPrice
);
emit Transfer(_from, _to, _value);
return true;
}
function _updateCheckpoints(
address _user,
uint256 _oldBalance,
uint256 _newBalance,
uint256 _currentPrice)
internal
{
bytes32 slot = keccak256(
abi.encodePacked(_user, iToken_ProfitSoFar)
);
int256 _currentProfit;
if (_newBalance == 0) {
_currentPrice = 0;
} else if (_oldBalance != 0) {
_currentProfit = _profitOf(
slot,
_oldBalance,
_currentPrice,
checkpointPrices_[_user]
);
}
assembly {
sstore(slot, _currentProfit)
}
checkpointPrices_[_user] = _currentPrice;
}
/* Public View functions */
function profitOf(
address user)
public
view
returns (int256)
{
bytes32 slot = keccak256(
abi.encodePacked(user, iToken_ProfitSoFar)
);
return _profitOf(
slot,
balances[user],
tokenPrice(),
checkpointPrices_[user]
);
}
function _profitOf(
bytes32 slot,
uint256 _balance,
uint256 _currentPrice,
uint256 _checkpointPrice)
internal
view
returns (int256 profitSoFar)
{
if (_checkpointPrice == 0) {
return 0;
}
assembly {
profitSoFar := sload(slot)
}
profitSoFar = int256(_currentPrice)
.sub(int256(_checkpointPrice))
.mul(int256(_balance))
.div(sWEI_PRECISION)
.add(profitSoFar);
}
function tokenPrice()
public
view
returns (uint256) // price
{
return _tokenPrice(_totalAssetSupply(totalAssetBorrow()));
}
function checkpointPrice(
address _user)
public
view
returns (uint256) // price
{
return checkpointPrices_[_user];
}
function marketLiquidity()
public
view
returns (uint256)
{
return _underlyingBalance();
}
// legacy function
function avgBorrowInterestRate()
external
view
returns (uint256)
{
return borrowInterestRate();
}
// the current rate being paid by borrowers in active loans
function borrowInterestRate()
public
view
returns (uint256)
{
return _nextBorrowInterestRate(
_totalAssetBorrowStored(),
0,
poolLastInterestRate()
);
}
// the minimum rate that new and existing borrowers will pay after the next borrow
function nextBorrowInterestRate(
uint256 borrowAmount)
external
view
returns (uint256)
{
return _nextBorrowInterestRate(
totalAssetBorrow(),
borrowAmount,
poolLastInterestRate()
);
}
// the current rate being received by suppliers
function supplyInterestRate()
external
view
returns (uint256)
{
uint256 assetBorrow = _totalAssetBorrowStored();
return _nextSupplyInterestRate(
_nextBorrowInterestRate(assetBorrow, 0, poolLastInterestRate()),
assetBorrow,
_totalAssetSupply(assetBorrow)
);
}
// the minimum rate new and existing suppliers will receive after the next supply
function nextSupplyInterestRate(
uint256 supplyAmount)
external
view
returns (uint256)
{
uint256 assetBorrow = totalAssetBorrow();
return _nextSupplyInterestRate(
_nextBorrowInterestRate(assetBorrow, 0, poolLastInterestRate()),
assetBorrow,
_totalAssetSupply(assetBorrow).add(supplyAmount)
);
}
function totalAssetBorrow()
public
view
returns (uint256)
{
return IBZx(bZxContract).getTotalPrincipal(
address(this),
address(0) // loanTokenAddress (depreciated)
);
}
function _totalAssetBorrowStored()
internal
view
returns (uint256)
{
return IBZx(bZxContract).getPoolPrincipalStored(address(this));
}
function totalAssetSupply()
external
view
returns (uint256)
{
return _totalAssetSupply(totalAssetBorrow());
}
function poolLastInterestRate()
public
view
returns (uint256)
{
return IBZx(bZxContract).getPoolLastInterestRate(address(this));
}
function getMaxEscrowAmount(
uint256 leverageAmount)
external
view
returns (uint256)
{
uint256 initialMargin = SafeMath.div(WEI_PRECISION * WEI_PERCENT_PRECISION, leverageAmount);
return marketLiquidity()
.mul(initialMargin)
.div(WEI_PERCENT_PRECISION);
}
// returns the user's balance of underlying token
function assetBalanceOf(
address _owner)
external
view
returns (uint256)
{
return balanceOf(_owner)
.mul(tokenPrice())
.div(WEI_PRECISION);
}
function getEstimatedMarginDetails(
uint256 leverageAmount,
uint256 loanTokenSent,
uint256 collateralTokenSent,
address collateralTokenAddress) // address(0) means ETH
external
view
returns (uint256 principal, uint256 collateral, uint256 interestRate, uint256 collateralToLoanRate)
{
if (collateralTokenAddress == address(0)) {
collateralTokenAddress = wethToken;
}
uint256 collateralToLoanPrecision;
(collateralToLoanRate, collateralToLoanPrecision) = IPriceFeeds(IBZx(bZxContract).priceFeeds()).queryRate(
collateralTokenAddress,
loanTokenAddress
);
require(collateralToLoanRate != 0 && collateralToLoanPrecision != 0, "20");
collateralToLoanRate = collateralToLoanRate
.mul(WEI_PRECISION)
.div(collateralToLoanPrecision);
collateral = IBZx(bZxContract).getEstimatedMarginExposure(
loanTokenAddress,
collateralTokenAddress,
loanTokenSent,
collateralTokenSent,
0, // interestRate (depreciated)
0 // principal
);
}
function getDepositAmountForBorrow(
uint256 borrowAmount,
uint256 initialLoanDuration, // duration in seconds
address collateralTokenAddress) // address(0) means ETH
external
view
returns (uint256) // depositAmount
{
if (borrowAmount != 0) {
if (borrowAmount <= _underlyingBalance()) {
if (collateralTokenAddress == address(0)) {
collateralTokenAddress = wethToken;
}
return IBZx(bZxContract).getRequiredCollateralByParams(
loanParamsIds[uint256(keccak256(abi.encodePacked(
collateralTokenAddress,
true
)))],
borrowAmount
).add(10); // some dust to compensate for rounding errors
}
}
}
function getBorrowAmountForDeposit(
uint256 depositAmount,
uint256 initialLoanDuration, // duration in seconds
address collateralTokenAddress) // address(0) means ETH
external
view
returns (uint256 borrowAmount)
{
if (depositAmount != 0) {
if (collateralTokenAddress == address(0)) {
collateralTokenAddress = wethToken;
}
borrowAmount = IBZx(bZxContract).getBorrowAmountByParams(
loanParamsIds[uint256(keccak256(abi.encodePacked(
collateralTokenAddress,
true
)))],
depositAmount
);
if (borrowAmount > _underlyingBalance()) {
borrowAmount = 0;
}
}
}
function getPoolUtilization()
external
view
returns (uint256)
{
uint256 totalBorrow = totalAssetBorrow();
return _utilizationRate(
totalBorrow,
_totalAssetSupply(totalBorrow)
);
}
/* Internal functions */
function _mintToken(
address receiver,
uint256 depositAmount)
internal
pausable
returns (uint256 mintAmount)
{
require (depositAmount != 0, "17");
_settleInterest(0);
uint256 currentPrice = _tokenPrice(_totalAssetSupply(_totalAssetBorrowStored()));
mintAmount = depositAmount
.mul(WEI_PRECISION)
.div(currentPrice);
if (msg.value == 0) {
_safeTransferFrom(loanTokenAddress, msg.sender, address(this), depositAmount, "18");
} else {
require(msg.value == depositAmount, "18");
IWeth(wethToken).deposit.value(depositAmount)();
}
_updateCheckpoints(
receiver,
balances[receiver],
_mint(receiver, mintAmount, depositAmount, currentPrice), // newBalance
currentPrice
);
}
function _burnToken(
uint256 burnAmount)
internal
pausable
returns (uint256 loanAmountPaid)
{
require(burnAmount != 0, "19");
_settleInterest(0);
if (burnAmount > balanceOf(msg.sender)) {
require(burnAmount == uint256(-1), "32");
burnAmount = balanceOf(msg.sender);
}
uint256 currentPrice = _tokenPrice(_totalAssetSupply(_totalAssetBorrowStored()));
uint256 loanAmountOwed = burnAmount
.mul(currentPrice)
.div(WEI_PRECISION);
uint256 loanAmountAvailableInContract = _underlyingBalance();
loanAmountPaid = loanAmountOwed;
require(loanAmountPaid <= loanAmountAvailableInContract, "37");
_updateCheckpoints(
msg.sender,
balances[msg.sender],
_burn(msg.sender, burnAmount, loanAmountPaid, currentPrice), // newBalance
currentPrice
);
}
function _borrow(
bytes32 loanId, // 0 if new loan
uint256 withdrawAmount,
uint256 initialLoanDuration, // duration in seconds
uint256 collateralTokenSent, // if 0, loanId must be provided; any ETH sent must equal this value
address collateralTokenAddress, // if address(0), this means ETH and ETH must be sent with the call or loanId must be provided
address borrower,
address receiver,
bytes memory /*loanDataBytes*/) // arbitrary order data
internal
pausable
returns (IBZx.LoanOpenData memory)
{
require(withdrawAmount != 0, "6");
require(msg.value == 0 || msg.value == collateralTokenSent, "7");
require(collateralTokenSent != 0 || loanId != 0, "8");
require(collateralTokenAddress != address(0) || msg.value != 0 || loanId != 0, "9");
// ensures authorized use of existing loan
require(loanId == 0 || msg.sender == borrower, "13");
_settleInterest(loanId);
if (loanId == 0) {
loanId = keccak256(abi.encodePacked(
collateralTokenAddress,
address(this),
msg.sender,
borrower,
block.timestamp
));
}
if (collateralTokenAddress == address(0)) {
collateralTokenAddress = wethToken;
}
require(collateralTokenAddress != loanTokenAddress, "10");
address[4] memory sentAddresses;
uint256[5] memory sentAmounts;
sentAddresses[0] = address(this); // lender
sentAddresses[1] = borrower;
sentAddresses[2] = receiver;
//sentAddresses[3] = address(0); // manager
//sentAmounts[0] = 0; // interestRate (found later)
//sentAmounts[1] = 0; // borrowAmount (found later)
//sentAmounts[2] = 0; // interestInitialAmount (found later)
//sentAmounts[3] = 0; // loanTokenSent
sentAmounts[4] = collateralTokenSent;
sentAmounts[1] = withdrawAmount;
sentAmounts[2] = 0; // interestInitialAmount (depreciated)
return _borrowOrTrade(
loanId,
withdrawAmount,
0, // leverageAmount (calculated later)
collateralTokenAddress,
sentAddresses,
sentAmounts,
"" // loanDataBytes
);
}
function _marginTrade(
bytes32 loanId, // 0 if new loan
uint256 leverageAmount,
uint256 loanTokenSent,
uint256 collateralTokenSent,
address collateralTokenAddress,
address trader,
bytes memory loanDataBytes)
internal
pausable
returns (IBZx.LoanOpenData memory loanOpenData)
{
// ensures authorized use of existing loan
require(loanId == 0 || msg.sender == trader, "13");
_settleInterest(loanId);
if (loanId == 0) {
loanId = keccak256(abi.encodePacked(
collateralTokenAddress,
address(this),
msg.sender,
trader,
block.timestamp
));
}
if (collateralTokenAddress == address(0)) {
collateralTokenAddress = wethToken;
}
require(collateralTokenAddress != loanTokenAddress, "11");
address[4] memory sentAddresses;
uint256[5] memory sentAmounts;
sentAddresses[0] = address(this); // lender
sentAddresses[1] = trader;
sentAddresses[2] = trader;
//sentAddresses[3] = address(0); // manager
//sentAmounts[0] = 0; // interestRate (found later)
//sentAmounts[1] = 0; // borrowAmount (found later)
//sentAmounts[2] = 0; // interestInitialAmount (interest is calculated based on fixed-term loan)
sentAmounts[3] = loanTokenSent;
sentAmounts[4] = collateralTokenSent;
uint256 totalDeposit;
uint256 collateralToLoanRate;
(sentAmounts[1],, totalDeposit, collateralToLoanRate) = _getPreMarginData( // borrowAmount, interestRate, totalDeposit, collateralToLoanRate
collateralTokenAddress,
collateralTokenSent,
loanTokenSent,
leverageAmount
);
require(totalDeposit != 0, "12");
loanOpenData = _borrowOrTrade(
loanId,
0, // withdrawAmount
leverageAmount,
collateralTokenAddress,
sentAddresses,
sentAmounts,
loanDataBytes
);
IBZx(bZxContract).setDepositAmount(
loanOpenData.loanId,
totalDeposit,
totalDeposit
.mul(WEI_PRECISION)
.div(collateralToLoanRate)
);
return loanOpenData;
}
function _settleInterest(
bytes32 loanId)
internal
{
IBZx(bZxContract).settleInterest(loanId);
}
function _totalDeposit(
address collateralTokenAddress,
uint256 collateralTokenSent,
uint256 loanTokenSent)
internal
view
returns (uint256 totalDeposit, uint256 collateralToLoanRate)
{
uint256 collateralToLoanPrecision;
(collateralToLoanRate, collateralToLoanPrecision) = IPriceFeeds(IBZx(bZxContract).priceFeeds()).queryRate(
collateralTokenAddress,
loanTokenAddress
);
require(collateralToLoanRate != 0 && collateralToLoanPrecision != 0, "20");
collateralToLoanRate = collateralToLoanRate
.mul(WEI_PRECISION)
.div(collateralToLoanPrecision);
totalDeposit = loanTokenSent;
if (collateralTokenSent != 0) {
totalDeposit = collateralTokenSent
.mul(collateralToLoanRate)
.div(WEI_PRECISION)
.add(totalDeposit);
}
}
// returns newPrincipal
function _borrowOrTrade(
bytes32 loanId,
uint256 withdrawAmount,
uint256 leverageAmount,
address collateralTokenAddress,
address[4] memory sentAddresses,
uint256[5] memory sentAmounts,
bytes memory loanDataBytes)
internal
returns (IBZx.LoanOpenData memory)
{
require (sentAmounts[1] <= _underlyingBalance() && // newPrincipal
sentAddresses[1] != address(0), // borrower
"24"
);
if (sentAddresses[2] == address(0)) {
sentAddresses[2] = sentAddresses[1]; // receiver = borrower
}
// handle transfers prior to adding newPrincipal to loanTokenSent
uint256 msgValue = _verifyTransfers(
collateralTokenAddress,
sentAddresses,
sentAmounts,
withdrawAmount
);
// adding the loan token portion from the lender to loanTokenSent
sentAmounts[3] = sentAmounts[3]
.add(sentAmounts[1]); // newPrincipal
if (withdrawAmount != 0) {
// withdrawAmount already sent to the borrower, so we aren't sending it to the protocol
sentAmounts[3] = sentAmounts[3]
.sub(withdrawAmount);
}
bool isTorqueLoan = withdrawAmount != 0 ?
true :
false;
bytes32 loanParamsId = loanParamsIds[uint256(keccak256(abi.encodePacked(
collateralTokenAddress,
isTorqueLoan
)))];
// converting to initialMargin
if (leverageAmount != 0) {
leverageAmount = SafeMath.div(WEI_PRECISION * WEI_PERCENT_PRECISION, leverageAmount);
}
return IBZx(bZxContract).borrowOrTradeFromPool.value(msgValue)(
loanParamsId,
loanId,
isTorqueLoan,
leverageAmount, // initialMargin
sentAddresses,
sentAmounts,
loanDataBytes
);
}
// sentAddresses[0]: lender
// sentAddresses[1]: borrower
// sentAddresses[2]: receiver
// sentAddresses[3]: manager
// sentAmounts[0]: interestRate
// sentAmounts[1]: newPrincipal
// sentAmounts[2]: interestInitialAmount
// sentAmounts[3]: loanTokenSent
// sentAmounts[4]: collateralTokenSent
function _verifyTransfers(
address collateralTokenAddress,
address[4] memory sentAddresses,
uint256[5] memory sentAmounts,
uint256 withdrawalAmount)
internal
returns (uint256 msgValue)
{
address _wethToken = wethToken;
address _loanTokenAddress = loanTokenAddress;
address receiver = sentAddresses[2];
uint256 newPrincipal = sentAmounts[1];
uint256 loanTokenSent = sentAmounts[3];
uint256 collateralTokenSent = sentAmounts[4];
require(_loanTokenAddress != collateralTokenAddress, "26");
msgValue = msg.value;
if (withdrawalAmount != 0) { // withdrawOnOpen == true
_safeTransfer(_loanTokenAddress, receiver, withdrawalAmount, "27");
if (newPrincipal > withdrawalAmount) {
_safeTransfer(_loanTokenAddress, bZxContract, newPrincipal - withdrawalAmount, "27");
}
} else {
_safeTransfer(_loanTokenAddress, bZxContract, newPrincipal, "27");
}
if (collateralTokenSent != 0) {
if (collateralTokenAddress == _wethToken && msgValue != 0 && msgValue >= collateralTokenSent) {
IWeth(_wethToken).deposit.value(collateralTokenSent)();
_safeTransfer(collateralTokenAddress, bZxContract, collateralTokenSent, "28");
msgValue -= collateralTokenSent;
} else {
_safeTransferFrom(collateralTokenAddress, msg.sender, bZxContract, collateralTokenSent, "28");
}
}
if (loanTokenSent != 0) {
_safeTransferFrom(_loanTokenAddress, msg.sender, bZxContract, loanTokenSent, "29");
}
}
function _safeTransfer(
address token,
address to,
uint256 amount,
string memory errorMsg)
internal
{
_callOptionalReturn(
token,
abi.encodeWithSelector(IERC20(token).transfer.selector, to, amount),
errorMsg
);
}
function _safeTransferFrom(
address token,
address from,
address to,
uint256 amount,
string memory errorMsg)
internal
{
_callOptionalReturn(
token,
abi.encodeWithSelector(IERC20(token).transferFrom.selector, from, to, amount),
errorMsg
);
}
function _callOptionalReturn(
address token,
bytes memory data,
string memory errorMsg)
internal
{
(bool success, bytes memory returndata) = token.call(data);
require(success, errorMsg);
if (returndata.length != 0) {
require(abi.decode(returndata, (bool)), errorMsg);
}
}
function _underlyingBalance()
internal
view
returns (uint256)
{
return IERC20(loanTokenAddress).balanceOf(address(this));
}
function _nextSupplyInterestRate(
uint256 nextBorrowRate,
uint256 assetBorrow,
uint256 assetSupply)
public
view
returns (uint256)
{
if (assetBorrow != 0 && assetSupply >= assetBorrow) {
return nextBorrowRate
.mul(_utilizationRate(assetBorrow, assetSupply))
.mul(SafeMath.sub(WEI_PERCENT_PRECISION, IBZx(bZxContract).lendingFeePercent()))
.div(WEI_PERCENT_PRECISION * WEI_PERCENT_PRECISION);
}
}
function _nextBorrowInterestRate(
uint256 totalBorrow,
uint256 newBorrowNotYetRealized,
uint256 lastIR)
public
view
returns (uint256 nextRate)
{
uint256 utilRate = _utilizationRate(
totalBorrow.add(newBorrowNotYetRealized),
_totalAssetSupply(totalBorrow)
);
//utilRate from 0e18 to 100e18
nextRate = rateHelper.calculateIR(utilRate, lastIR);
}
/* Internal View functions */
function _tokenPrice(
uint256 assetSupply)
internal
view
returns (uint256)
{
uint256 totalTokenSupply = totalSupply_;
return totalTokenSupply != 0 ?
assetSupply
.mul(WEI_PRECISION)
.div(totalTokenSupply) : initialPrice;
}
function _getPreMarginData(
address collateralTokenAddress,
uint256 collateralTokenSent,
uint256 loanTokenSent,
uint256 leverageAmount)
internal
view
returns (uint256 borrowAmount, uint256 interestRate, uint256 totalDeposit, uint256 collateralToLoanRate)
{
(totalDeposit, collateralToLoanRate) = _totalDeposit(
collateralTokenAddress,
collateralTokenSent,
loanTokenSent
);
uint256 initialMargin = SafeMath.div(WEI_PRECISION * WEI_PERCENT_PRECISION, leverageAmount);
// assumes that loan and collateral token are the same
borrowAmount = totalDeposit
.mul(WEI_PERCENT_PRECISION)
.div(initialMargin);
}
function _totalAssetSupply(
uint256 totalBorrow)
internal
view
returns (uint256 totalSupply)
{
totalSupply = _flTotalAssetSupply; // temporary locked totalAssetSupply during a flash loan transaction
if (totalSupply == 0) {
totalSupply = _underlyingBalance()
.add(totalBorrow);
}
}
function _utilizationRate(
uint256 assetBorrow,
uint256 assetSupply)
internal
pure
returns (uint256)
{
if (assetSupply != 0) {
// U = total_borrow / total_supply
return assetBorrow
.mul(WEI_PERCENT_PRECISION)
.div(assetSupply);
}
}
/* Owner-Only functions */
function updateSettings(
address settingsTarget,
bytes memory callData)
public
{
if (msg.sender != owner()) {
address _lowerAdmin;
address _lowerAdminContract;
assembly {
_lowerAdmin := sload(iToken_LowerAdminAddress)
_lowerAdminContract := sload(iToken_LowerAdminContract)
}
require(msg.sender == _lowerAdmin && settingsTarget == _lowerAdminContract);
}
address currentTarget = target_;
target_ = settingsTarget;
(bool result,) = address(this).call(callData);
uint256 size;
uint256 ptr;
assembly {
size := returndatasize
ptr := mload(0x40)
returndatacopy(ptr, 0, size)
if eq(result, 0) { revert(ptr, size) }
}
target_ = currentTarget;
assembly {
return(ptr, size)
}
}
function updateFlashBorrowFeePercent(uint256 newFeePercent) public onlyOwner {
flashBorrowFeePercent = newFeePercent;
}
}
/*
pragma solidity 0.5.16;
contract ArbitraryCaller {
function sendCall(
address target,
bytes calldata callData)
external
payable
{
(bool success,) = target.call.value(msg.value)(callData);
assembly {
let size := returndatasize()
let ptr := mload(0x40)
returndatacopy(ptr, 0, size)
if eq(success, 0) { revert(ptr, size) }
return(ptr, size)
}
}
}
*/
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity 0.5.17;
import "AdvancedTokenStorage.sol";
contract AdvancedToken is AdvancedTokenStorage {
using SafeMath for uint256;
function approve(
address _spender,
uint256 _value)
public
returns (bool)
{
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function increaseApproval(
address _spender,
uint256 _addedValue)
public
returns (bool)
{
uint256 _allowed = allowed[msg.sender][_spender]
.add(_addedValue);
allowed[msg.sender][_spender] = _allowed;
emit Approval(msg.sender, _spender, _allowed);
return true;
}
function decreaseApproval(
address _spender,
uint256 _subtractedValue)
public
returns (bool)
{
uint256 _allowed = allowed[msg.sender][_spender];
if (_subtractedValue >= _allowed) {
_allowed = 0;
} else {
_allowed -= _subtractedValue;
}
allowed[msg.sender][_spender] = _allowed;
emit Approval(msg.sender, _spender, _allowed);
return true;
}
function _mint(
address _to,
uint256 _tokenAmount,
uint256 _assetAmount,
uint256 _price)
internal
returns (uint256)
{
require(_to != address(0), "15");
uint256 _balance = balances[_to]
.add(_tokenAmount);
balances[_to] = _balance;
totalSupply_ = totalSupply_
.add(_tokenAmount);
emit Mint(_to, _tokenAmount, _assetAmount, _price);
emit Transfer(address(0), _to, _tokenAmount);
return _balance;
}
function _burn(
address _who,
uint256 _tokenAmount,
uint256 _assetAmount,
uint256 _price)
internal
returns (uint256)
{
uint256 _balance = balances[_who].sub(_tokenAmount, "16");
// a rounding error may leave dust behind, so we clear this out
if (_balance <= 10) {
_tokenAmount = _tokenAmount.add(_balance);
_balance = 0;
}
balances[_who] = _balance;
totalSupply_ = totalSupply_.sub(_tokenAmount);
emit Burn(_who, _tokenAmount, _assetAmount, _price);
emit Transfer(_who, address(0), _tokenAmount);
return _balance;
}
}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity 0.5.17;
import "LoanTokenBase.sol";
contract AdvancedTokenStorage is LoanTokenBase {
using SafeMath for uint256;
event Transfer(
address indexed from,
address indexed to,
uint256 value
);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Mint(
address indexed minter,
uint256 tokenAmount,
uint256 assetAmount,
uint256 price
);
event Burn(
address indexed burner,
uint256 tokenAmount,
uint256 assetAmount,
uint256 price
);
event FlashBorrow(
address borrower,
address target,
address loanToken,
uint256 loanAmount
);
mapping(address => uint256) internal balances;
mapping (address => mapping (address => uint256)) internal allowed;
uint256 internal totalSupply_;
function totalSupply()
public
view
returns (uint256)
{
return totalSupply_;
}
function balanceOf(
address _owner)
public
view
returns (uint256)
{
return balances[_owner];
}
function allowance(
address _owner,
address _spender)
public
view
returns (uint256)
{
return allowed[_owner][_spender];
}
}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity 0.5.17;
import "SafeMath.sol";
import "SignedSafeMath.sol";
import "ReentrancyGuard.sol";
import "Ownable.sol";
import "Address.sol";
import "IWethERC20.sol";
import "PausableGuardian.sol";
contract LoanTokenBase is ReentrancyGuard, Ownable, PausableGuardian {
uint256 internal constant WEI_PRECISION = 10**18;
uint256 internal constant WEI_PERCENT_PRECISION = 10**20;
int256 internal constant sWEI_PRECISION = 10**18;
string public name;
string public symbol;
uint8 public decimals;
// uint88 for tight packing -> 8 + 88 + 160 = 256
uint88 internal lastSettleTime_;
address public loanTokenAddress;
uint256 internal baseRate_UNUSED;
uint256 internal rateMultiplier_UNUSED;
uint256 internal lowUtilBaseRate_UNUSED;
uint256 internal lowUtilRateMultiplier_UNUSED;
uint256 internal targetLevel_UNUSED;
uint256 internal kinkLevel_UNUSED;
uint256 internal maxScaleRate_UNUSED;
uint256 internal _flTotalAssetSupply;
uint256 public checkpointSupply;
uint256 public initialPrice;
mapping (uint256 => bytes32) public loanParamsIds; // mapping of keccak256(collateralToken, isTorqueLoan) to loanParamsId
mapping (address => uint256) internal checkpointPrices_; // price of token at last user checkpoint
}
pragma solidity ^0.5.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*
* _Available since v2.4.0._
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*
* _Available since v2.4.0._
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
pragma solidity >=0.5.0 <0.6.0;
/**
* @title SignedSafeMath
* @dev Signed math operations with safety checks that revert on error.
*/
library SignedSafeMath {
int256 constant private _INT256_MIN = -2**255;
/**
* @dev Returns the multiplication of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(int256 a, int256 b) internal pure returns (int256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");
int256 c = a * b;
require(c / a == b, "SignedSafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two signed integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(int256 a, int256 b) internal pure returns (int256) {
require(b != 0, "SignedSafeMath: division by zero");
require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");
int256 c = a / b;
return c;
}
/**
* @dev Returns the subtraction of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(int256 a, int256 b) internal pure returns (int256) {
int256 c = a - b;
require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");
return c;
}
/**
* @dev Returns the addition of two signed integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");
return c;
}
}
pragma solidity >=0.5.0 <0.6.0;
/**
* @title Helps contracts guard against reentrancy attacks.
* @author Remco Bloemen <remco@2Ï€.com>, Eenae <[email protected]>
* @dev If you mark a function `nonReentrant`, you should also
* mark it `external`.
*/
contract ReentrancyGuard {
/// @dev Constant for unlocked guard state - non-zero to prevent extra gas costs.
/// See: https://github.com/OpenZeppelin/openzeppelin-solidity/issues/1056
uint256 internal constant REENTRANCY_GUARD_FREE = 1;
/// @dev Constant for locked guard state
uint256 internal constant REENTRANCY_GUARD_LOCKED = 2;
/**
* @dev We use a single lock for the whole contract.
*/
uint256 internal reentrancyLock = REENTRANCY_GUARD_FREE;
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* If you mark a function `nonReentrant`, you should also
* mark it `external`. Calling one `nonReentrant` function from
* another is not supported. Instead, you can implement a
* `private` function doing the actual work, and an `external`
* wrapper marked as `nonReentrant`.
*/
modifier nonReentrant() {
require(reentrancyLock == REENTRANCY_GUARD_FREE, "nonReentrant");
reentrancyLock = REENTRANCY_GUARD_LOCKED;
_;
reentrancyLock = REENTRANCY_GUARD_FREE;
}
}
pragma solidity ^0.5.0;
import "Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(isOwner(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Returns true if the caller is the current owner.
*/
function isOwner() public view returns (bool) {
return _msgSender() == _owner;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
*/
function _transferOwnership(address newOwner) internal {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
pragma solidity ^0.5.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN 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.
*/
contract Context {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
constructor () internal { }
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns (address payable) {
return msg.sender;
}
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
pragma solidity ^0.5.5;
/**
* @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
* ====
*/
function isContract(address account) internal view returns (bool) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @dev Converts an `address` into `address payable`. Note that this is
* simply a type cast: the actual underlying value is not changed.
*
* _Available since v2.4.0._
*/
function toPayable(address account) internal pure returns (address payable) {
return address(uint160(account));
}
/**
* @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].
*
* _Available since v2.4.0._
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-call-value
(bool success, ) = recipient.call.value(amount)("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity >=0.5.0 <0.6.0;
import "IWeth.sol";
import "IERC20.sol";
contract IWethERC20 is IWeth, IERC20 {}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity >=0.5.0 <0.6.0;
interface IWeth {
function deposit() external payable;
function withdraw(uint256 wad) external;
}
pragma solidity ^0.5.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP. Does not include
* the optional functions; to access them see {ERC20Detailed}.
*/
interface IERC20 {
/**
* @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 `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount) external returns (bool);
/**
* @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);
}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity 0.5.17;
import "Ownable.sol";
contract PausableGuardian is Ownable {
// keccak256("Pausable_FunctionPause")
bytes32 internal constant Pausable_FunctionPause = 0xa7143c84d793a15503da6f19bf9119a2dac94448ca45d77c8bf08f57b2e91047;
// keccak256("Pausable_GuardianAddress")
bytes32 internal constant Pausable_GuardianAddress = 0x80e6706973d0c59541550537fd6a33b971efad732635e6c3b99fb01006803cdf;
modifier pausable {
require(!_isPaused(msg.sig), "paused");
_;
}
function _isPaused(bytes4 sig) public view returns (bool isPaused) {
bytes32 slot = keccak256(abi.encodePacked(sig, Pausable_FunctionPause));
assembly {
isPaused := sload(slot)
}
}
function toggleFunctionPause(bytes4 sig) public {
require(msg.sender == getGuardian() || msg.sender == owner(), "unauthorized");
bytes32 slot = keccak256(abi.encodePacked(sig, Pausable_FunctionPause));
assembly {
sstore(slot, 1)
}
}
function toggleFunctionUnPause(bytes4 sig) public {
// only DAO can unpause, and adding guardian temporarily
require(msg.sender == getGuardian() || msg.sender == owner(), "unauthorized");
bytes32 slot = keccak256(abi.encodePacked(sig, Pausable_FunctionPause));
assembly {
sstore(slot, 0)
}
}
function changeGuardian(address newGuardian) public {
require(msg.sender == getGuardian() || msg.sender == owner(), "unauthorized");
assembly {
sstore(Pausable_GuardianAddress, newGuardian)
}
}
function getGuardian() public view returns (address guardian) {
assembly {
guardian := sload(Pausable_GuardianAddress)
}
}
}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity 0.5.17;
import "ICurvedInterestRate.sol";
contract StorageExtension {
address internal target_;
uint256 public flashBorrowFeePercent; // set to 0.03%
ICurvedInterestRate rateHelper;
}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
// SPDX-License-Identifier: Apache-2.0
pragma solidity >=0.5.0 <0.9.0;
interface ICurvedInterestRate {
function getInterestRate(
uint256 _U,
uint256 _a,
uint256 _b
) external pure returns (uint256 interestRate);
function getAB(uint256 _IR1) external pure returns (uint256 a, uint256 b);
function getAB(
uint256 _IR1,
uint256 _IR2,
uint256 _UR1,
uint256 _UR2
) external pure returns (uint256 a, uint256 b);
function calculateIR(uint256 _U, uint256 _IR1) external pure returns (uint256 interestRate);
}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache-2.0
*/
// SPDX-License-Identifier: Apache-2.0
pragma solidity >=0.5.0 <=0.8.4;
pragma experimental ABIEncoderV2;
/// @title A proxy interface for The Protocol
/// @author bZeroX
/// @notice This is just an interface, not to be deployed itself.
/// @dev This interface is to be used for the protocol interactions.
interface IBZx {
////// Protocol //////
/// @dev adds or replaces existing proxy module
/// @param target target proxy module address
function replaceContract(address target) external;
/// @dev updates all proxy modules addreses and function signatures.
/// sigsArr and targetsArr should be of equal length
/// @param sigsArr array of function signatures
/// @param targetsArr array of target proxy module addresses
function setTargets(
string[] calldata sigsArr,
address[] calldata targetsArr
) external;
/// @dev returns protocol module address given a function signature
/// @return module address
function getTarget(string calldata sig) external view returns (address);
////// Protocol Settings //////
/// @dev sets price feed contract address. The contract on the addres should implement IPriceFeeds interface
/// @param newContract module address for the IPriceFeeds implementation
function setPriceFeedContract(address newContract) external;
/// @dev sets swaps contract address. The contract on the addres should implement ISwapsImpl interface
/// @param newContract module address for the ISwapsImpl implementation
function setSwapsImplContract(address newContract) external;
/// @dev sets loan pool with assets. Accepts two arrays of equal length
/// @param pools array of address of pools
/// @param assets array of addresses of assets
function setLoanPool(address[] calldata pools, address[] calldata assets)
external;
/// @dev updates list of supported tokens, it can be use also to disable or enable particualr token
/// @param addrs array of address of pools
/// @param toggles array of addresses of assets
/// @param withApprovals resets tokens to unlimited approval with the swaps integration (kyber, etc.)
function setSupportedTokens(
address[] calldata addrs,
bool[] calldata toggles,
bool withApprovals
) external;
/// @dev sets lending fee with WEI_PERCENT_PRECISION
/// @param newValue lending fee percent
function setLendingFeePercent(uint256 newValue) external;
/// @dev sets trading fee with WEI_PERCENT_PRECISION
/// @param newValue trading fee percent
function setTradingFeePercent(uint256 newValue) external;
/// @dev sets borrowing fee with WEI_PERCENT_PRECISION
/// @param newValue borrowing fee percent
function setBorrowingFeePercent(uint256 newValue) external;
/// @dev sets affiliate fee with WEI_PERCENT_PRECISION
/// @param newValue affiliate fee percent
function setAffiliateFeePercent(uint256 newValue) external;
/// @dev sets liquidation inncetive percent per loan per token. This is the profit percent
/// that liquidator gets in the process of liquidating.
/// @param loanTokens array list of loan tokens
/// @param collateralTokens array list of collateral tokens
/// @param amounts array list of liquidation inncetive amount
function setLiquidationIncentivePercent(
address[] calldata loanTokens,
address[] calldata collateralTokens,
uint256[] calldata amounts
) external;
/// @dev sets max swap rate slippage percent.
/// @param newAmount max swap rate slippage percent.
function setMaxDisagreement(uint256 newAmount) external;
/// TODO
function setSourceBufferPercent(uint256 newAmount) external;
/// @dev sets maximum supported swap size in ETH
/// @param newAmount max swap size in ETH.
function setMaxSwapSize(uint256 newAmount) external;
/// @dev sets fee controller address
/// @param newController address of the new fees controller
function setFeesController(address newController) external;
/// @dev withdraws lending fees to receiver. Only can be called by feesController address
/// @param tokens array of token addresses.
/// @param receiver fees receiver address
/// @return amounts array of amounts withdrawn
function withdrawFees(
address[] calldata tokens,
address receiver,
FeeClaimType feeType
) external returns (uint256[] memory amounts);
/// @dev withdraw protocol token (BZRX) from vesting contract vBZRX
/// @param receiver address of BZRX tokens claimed
/// @param amount of BZRX token to be claimed. max is claimed if amount is greater than balance.
/// @return rewardToken reward token address
/// @return withdrawAmount amount
function withdrawProtocolToken(address receiver, uint256 amount)
external
returns (address rewardToken, uint256 withdrawAmount);
/// @dev depozit protocol token (BZRX)
/// @param amount address of BZRX tokens to deposit
function depositProtocolToken(uint256 amount) external;
function grantRewards(address[] calldata users, uint256[] calldata amounts)
external
returns (uint256 totalAmount);
// NOTE: this doesn't sanitize inputs -> inaccurate values may be returned if there are duplicates tokens input
function queryFees(address[] calldata tokens, FeeClaimType feeType)
external
view
returns (uint256[] memory amountsHeld, uint256[] memory amountsPaid);
function priceFeeds() external view returns (address);
function swapsImpl() external view returns (address);
function logicTargets(bytes4) external view returns (address);
function loans(bytes32) external view returns (Loan memory);
function loanParams(bytes32) external view returns (LoanParams memory);
// we don't use this yet
// function lenderOrders(address, bytes32) external returns (Order memory);
// function borrowerOrders(address, bytes32) external returns (Order memory);
function delegatedManagers(bytes32, address) external view returns (bool);
function lenderInterest(address, address)
external
view
returns (LenderInterest memory);
function loanInterest(bytes32) external view returns (LoanInterest memory);
function feesController() external view returns (address);
function lendingFeePercent() external view returns (uint256);
function lendingFeeTokensHeld(address) external view returns (uint256);
function lendingFeeTokensPaid(address) external view returns (uint256);
function borrowingFeePercent() external view returns (uint256);
function borrowingFeeTokensHeld(address) external view returns (uint256);
function borrowingFeeTokensPaid(address) external view returns (uint256);
function protocolTokenHeld() external view returns (uint256);
function protocolTokenPaid() external view returns (uint256);
function affiliateFeePercent() external view returns (uint256);
function liquidationIncentivePercent(address, address)
external
view
returns (uint256);
function loanPoolToUnderlying(address) external view returns (address);
function underlyingToLoanPool(address) external view returns (address);
function supportedTokens(address) external view returns (bool);
function maxDisagreement() external view returns (uint256);
function sourceBufferPercent() external view returns (uint256);
function maxSwapSize() external view returns (uint256);
/// @dev get list of loan pools in the system. Ordering is not guaranteed
/// @param start start index
/// @param count number of pools to return
/// @return loanPoolsList array of loan pools
function getLoanPoolsList(uint256 start, uint256 count)
external
view
returns (address[] memory loanPoolsList);
/// @dev checks whether addreess is a loan pool address
/// @return boolean
function isLoanPool(address loanPool) external view returns (bool);
////// Loan Settings //////
/// @dev creates new loan param settings
/// @param loanParamsList array of LoanParams
/// @return loanParamsIdList array of loan ids created
function setupLoanParams(LoanParams[] calldata loanParamsList)
external
returns (bytes32[] memory loanParamsIdList);
/// @dev Deactivates LoanParams for future loans. Active loans using it are unaffected.
/// @param loanParamsIdList array of loan ids
function disableLoanParams(bytes32[] calldata loanParamsIdList) external;
/// @dev gets array of LoanParams by given ids
/// @param loanParamsIdList array of loan ids
/// @return loanParamsList array of LoanParams
function getLoanParams(bytes32[] calldata loanParamsIdList)
external
view
returns (LoanParams[] memory loanParamsList);
/// @dev Enumerates LoanParams in the system by owner
/// @param owner of the loan params
/// @param start number of loans to return
/// @param count total number of the items
/// @return loanParamsList array of LoanParams
function getLoanParamsList(
address owner,
uint256 start,
uint256 count
) external view returns (bytes32[] memory loanParamsList);
/// @dev returns total loan principal for token address
/// @param lender address
/// @param loanToken address
/// @return total principal of the loan
function getTotalPrincipal(address lender, address loanToken)
external
view
returns (uint256);
/// @dev returns total principal for a loan pool that was last settled
/// @param pool address
/// @return total stored principal of the loan
function getPoolPrincipalStored(address pool)
external
view
returns (uint256);
/// @dev returns the last interest rate founnd during interest settlement
/// @param pool address
/// @return the last interset rate
function getPoolLastInterestRate(address pool)
external
view
returns (uint256);
////// Loan Openings //////
/// @dev This is THE function that borrows or trades on the protocol
/// @param loanParamsId id of the LoanParam created beforehand by setupLoanParams function
/// @param loanId id of existing loan, if 0, start a new loan
/// @param isTorqueLoan boolean whether it is toreque or non torque loan
/// @param initialMargin in WEI_PERCENT_PRECISION
/// @param sentAddresses array of size 4:
/// lender: must match loan if loanId provided
/// borrower: must match loan if loanId provided
/// receiver: receiver of funds (address(0) assumes borrower address)
/// manager: delegated manager of loan unless address(0)
/// @param sentValues array of size 5:
/// newRate: new loan interest rate
/// newPrincipal: new loan size (borrowAmount + any borrowed interest)
/// torqueInterest: new amount of interest to escrow for Torque loan (determines initial loan length)
/// loanTokenReceived: total loanToken deposit (amount not sent to borrower in the case of Torque loans)
/// collateralTokenReceived: total collateralToken deposit
/// @param loanDataBytes required when sending ether
/// @return principal of the loan and collateral amount
function borrowOrTradeFromPool(
bytes32 loanParamsId,
bytes32 loanId,
bool isTorqueLoan,
uint256 initialMargin,
address[4] calldata sentAddresses,
uint256[5] calldata sentValues,
bytes calldata loanDataBytes
) external payable returns (LoanOpenData memory);
/// @dev sets/disables/enables the delegated manager for the loan
/// @param loanId id of the loan
/// @param delegated delegated manager address
/// @param toggle boolean set enabled or disabled
function setDelegatedManager(
bytes32 loanId,
address delegated,
bool toggle
) external;
/// @dev estimates margin exposure for simulated position
/// @param loanToken address of the loan token
/// @param collateralToken address of collateral token
/// @param loanTokenSent amout of loan token sent
/// @param collateralTokenSent amount of collateral token sent
/// @param interestRate yearly interest rate
/// @param newPrincipal principal amount of the loan
/// @return estimated margin exposure amount
function getEstimatedMarginExposure(
address loanToken,
address collateralToken,
uint256 loanTokenSent,
uint256 collateralTokenSent,
uint256 interestRate,
uint256 newPrincipal
) external view returns (uint256);
/// @dev calculates required collateral for simulated position
/// @param loanToken address of loan token
/// @param collateralToken address of collateral token
/// @param newPrincipal principal amount of the loan
/// @param marginAmount margin amount of the loan
/// @param isTorqueLoan boolean torque or non torque loan
/// @return collateralAmountRequired amount required
function getRequiredCollateral(
address loanToken,
address collateralToken,
uint256 newPrincipal,
uint256 marginAmount,
bool isTorqueLoan
) external view returns (uint256 collateralAmountRequired);
function getRequiredCollateralByParams(
bytes32 loanParamsId,
uint256 newPrincipal
) external view returns (uint256 collateralAmountRequired);
/// @dev calculates borrow amount for simulated position
/// @param loanToken address of loan token
/// @param collateralToken address of collateral token
/// @param collateralTokenAmount amount of collateral token sent
/// @param marginAmount margin amount
/// @param isTorqueLoan boolean torque or non torque loan
/// @return borrowAmount possible borrow amount
function getBorrowAmount(
address loanToken,
address collateralToken,
uint256 collateralTokenAmount,
uint256 marginAmount,
bool isTorqueLoan
) external view returns (uint256 borrowAmount);
function getBorrowAmountByParams(
bytes32 loanParamsId,
uint256 collateralTokenAmount
) external view returns (uint256 borrowAmount);
////// Loan Closings //////
/// @dev liquidates unhealty loans
/// @param loanId id of the loan
/// @param receiver address receiving liquidated loan collateral
/// @param closeAmount amount to close denominated in loanToken
/// @return loanCloseAmount amount of the collateral token of the loan
/// @return seizedAmount sezied amount in the collateral token
/// @return seizedToken loan token address
function liquidate(
bytes32 loanId,
address receiver,
uint256 closeAmount
)
external
payable
returns (
uint256 loanCloseAmount,
uint256 seizedAmount,
address seizedToken
);
/// @dev close position with loan token deposit
/// @param loanId id of the loan
/// @param receiver collateral token reciever address
/// @param depositAmount amount of loan token to deposit
/// @return loanCloseAmount loan close amount
/// @return withdrawAmount loan token withdraw amount
/// @return withdrawToken loan token address
function closeWithDeposit(
bytes32 loanId,
address receiver,
uint256 depositAmount // denominated in loanToken
)
external
payable
returns (
uint256 loanCloseAmount,
uint256 withdrawAmount,
address withdrawToken
);
/// @dev close position with swap
/// @param loanId id of the loan
/// @param receiver collateral token reciever address
/// @param swapAmount amount of loan token to swap
/// @param returnTokenIsCollateral boolean whether to return tokens is collateral
/// @param loanDataBytes custom payload for specifying swap implementation and data to pass
/// @return loanCloseAmount loan close amount
/// @return withdrawAmount loan token withdraw amount
/// @return withdrawToken loan token address
function closeWithSwap(
bytes32 loanId,
address receiver,
uint256 swapAmount, // denominated in collateralToken
bool returnTokenIsCollateral, // true: withdraws collateralToken, false: withdraws loanToken
bytes calldata loanDataBytes
)
external
returns (
uint256 loanCloseAmount,
uint256 withdrawAmount,
address withdrawToken
);
////// Loan Closings With Gas Token //////
/// @dev liquidates unhealty loans by using Gas token
/// @param loanId id of the loan
/// @param receiver address receiving liquidated loan collateral
/// @param gasTokenUser user address of the GAS token
/// @param closeAmount amount to close denominated in loanToken
/// @return loanCloseAmount loan close amount
/// @return seizedAmount loan token withdraw amount
/// @return seizedToken loan token address
function liquidateWithGasToken(
bytes32 loanId,
address receiver,
address gasTokenUser,
uint256 closeAmount // denominated in loanToken
)
external
payable
returns (
uint256 loanCloseAmount,
uint256 seizedAmount,
address seizedToken
);
/// @dev close position with loan token deposit
/// @param loanId id of the loan
/// @param receiver collateral token reciever address
/// @param gasTokenUser user address of the GAS token
/// @param depositAmount amount of loan token to deposit denominated in loanToken
/// @return loanCloseAmount loan close amount
/// @return withdrawAmount loan token withdraw amount
/// @return withdrawToken loan token address
function closeWithDepositWithGasToken(
bytes32 loanId,
address receiver,
address gasTokenUser,
uint256 depositAmount
)
external
payable
returns (
uint256 loanCloseAmount,
uint256 withdrawAmount,
address withdrawToken
);
/// @dev close position with swap
/// @param loanId id of the loan
/// @param receiver collateral token reciever address
/// @param gasTokenUser user address of the GAS token
/// @param swapAmount amount of loan token to swap denominated in collateralToken
/// @param returnTokenIsCollateral true: withdraws collateralToken, false: withdraws loanToken
/// @return loanCloseAmount loan close amount
/// @return withdrawAmount loan token withdraw amount
/// @return withdrawToken loan token address
function closeWithSwapWithGasToken(
bytes32 loanId,
address receiver,
address gasTokenUser,
uint256 swapAmount,
bool returnTokenIsCollateral,
bytes calldata loanDataBytes
)
external
returns (
uint256 loanCloseAmount,
uint256 withdrawAmount,
address withdrawToken
);
////// Loan Maintenance //////
/// @dev deposit collateral to existing loan
/// @param loanId existing loan id
/// @param depositAmount amount to deposit which must match msg.value if ether is sent
function depositCollateral(bytes32 loanId, uint256 depositAmount)
external
payable;
/// @dev withdraw collateral from existing loan
/// @param loanId existing loan id
/// @param receiver address of withdrawn tokens
/// @param withdrawAmount amount to withdraw
/// @return actualWithdrawAmount actual amount withdrawn
function withdrawCollateral(
bytes32 loanId,
address receiver,
uint256 withdrawAmount
) external returns (uint256 actualWithdrawAmount);
/// @dev settles accrued interest for all active loans from a loan pool
/// @param loanId existing loan id
function settleInterest(bytes32 loanId) external;
/*/// @dev withdraw accrued interest rate for a loan given token address
/// @param loanToken loan token address
function withdrawAccruedInterest(address loanToken) external;*/
/*/// @dev extends loan duration by depositing more collateral
/// @param loanId id of the existing loan
/// @param depositAmount amount to deposit
/// @param useCollateral boolean whether to extend using collateral or deposit amount
/// @return secondsExtended by that number of seconds loan duration was extended
function extendLoanDuration(
bytes32 loanId,
uint256 depositAmount,
bool useCollateral,
bytes calldata // for future use loanDataBytes
) external payable returns (uint256 secondsExtended);*/
/*/// @dev reduces loan duration by withdrawing collateral
/// @param loanId id of the existing loan
/// @param receiver address to receive tokens
/// @param withdrawAmount amount to withdraw
/// @return secondsReduced by that number of seconds loan duration was extended
function reduceLoanDuration(
bytes32 loanId,
address receiver,
uint256 withdrawAmount
) external returns (uint256 secondsReduced);*/
function setDepositAmount(
bytes32 loanId,
uint256 depositValueAsLoanToken,
uint256 depositValueAsCollateralToken
) external;
function claimRewards(address receiver)
external
returns (uint256 claimAmount);
function transferLoan(bytes32 loanId, address newOwner) external;
function rewardsBalanceOf(address user)
external
view
returns (uint256 rewardsBalance);
function getInterestModelValues(
address pool,
bytes32 loanId)
external
view
returns (
uint256 _poolLastUpdateTime,
uint256 _poolPrincipalTotal,
uint256 _poolInterestTotal,
uint256 _poolRatePerTokenStored,
uint256 _poolLastInterestRate,
uint256 _loanPrincipalTotal,
uint256 _loanInterestTotal,
uint256 _loanRatePerTokenPaid
);
/*/// @dev Gets current lender interest data totals for all loans with a specific oracle and interest token
/// @param lender The lender address
/// @param loanToken The loan token address
/// @return interestPaid The total amount of interest that has been paid to a lender so far
/// @return interestPaidDate The date of the last interest pay out, or 0 if no interest has been withdrawn yet
/// @return interestOwedPerDay The amount of interest the lender is earning per day
/// @return interestUnPaid The total amount of interest the lender is owned and not yet withdrawn
/// @return interestFeePercent The fee retained by the protocol before interest is paid to the lender
/// @return principalTotal The total amount of outstading principal the lender has loaned
function getLenderInterestData(address lender, address loanToken)
external
view
returns (
uint256 interestPaid,
uint256 interestPaidDate,
uint256 interestOwedPerDay,
uint256 interestUnPaid,
uint256 interestFeePercent,
uint256 principalTotal
);
/// @dev Gets current interest data for a loan
/// @param loanId A unique id representing the loan
/// @return loanToken The loan token that interest is paid in
/// @return interestOwedPerDay The amount of interest the borrower is paying per day
/// @return interestDepositTotal The total amount of interest the borrower has deposited
/// @return interestDepositRemaining The amount of deposited interest that is not yet owed to a lender
function getLoanInterestData(bytes32 loanId)
external
view
returns (
address loanToken,
uint256 interestOwedPerDay,
uint256 interestDepositTotal,
uint256 interestDepositRemaining
);*/
/// @dev gets list of loans of particular user address
/// @param user address of the loans
/// @param start of the index
/// @param count number of loans to return
/// @param loanType type of the loan: All(0), Margin(1), NonMargin(2)
/// @param isLender whether to list lender loans or borrower loans
/// @param unsafeOnly booleat if true return only unsafe loans that are open for liquidation
/// @return loansData LoanReturnData array of loans
function getUserLoans(
address user,
uint256 start,
uint256 count,
LoanType loanType,
bool isLender,
bool unsafeOnly
) external view returns (LoanReturnData[] memory loansData);
function getUserLoansCount(address user, bool isLender)
external
view
returns (uint256);
/// @dev gets existing loan
/// @param loanId id of existing loan
/// @return loanData array of loans
function getLoan(bytes32 loanId)
external
view
returns (LoanReturnData memory loanData);
/// @dev gets loan principal including interest
/// @param loanId id of existing loan
/// @return principal
function getLoanPrincipal(bytes32 loanId)
external
view
returns (uint256 principal);
/// @dev gets loan outstanding interest
/// @param loanId id of existing loan
/// @return interest
function getLoanInterestOutstanding(bytes32 loanId)
external
view
returns (uint256 interest);
/// @dev get current active loans in the system
/// @param start of the index
/// @param count number of loans to return
/// @param unsafeOnly boolean if true return unsafe loan only (open for liquidation)
function getActiveLoans(
uint256 start,
uint256 count,
bool unsafeOnly
) external view returns (LoanReturnData[] memory loansData);
/// @dev get current active loans in the system
/// @param start of the index
/// @param count number of loans to return
/// @param unsafeOnly boolean if true return unsafe loan only (open for liquidation)
/// @param isLiquidatable boolean if true return liquidatable loans only
function getActiveLoansAdvanced(
uint256 start,
uint256 count,
bool unsafeOnly,
bool isLiquidatable
) external view returns (LoanReturnData[] memory loansData);
function getActiveLoansCount() external view returns (uint256);
////// Swap External //////
/// @dev swap thru external integration
/// @param sourceToken source token address
/// @param destToken destintaion token address
/// @param receiver address to receive tokens
/// @param returnToSender TODO
/// @param sourceTokenAmount source token amount
/// @param requiredDestTokenAmount destination token amount
/// @param swapData TODO
/// @return destTokenAmountReceived destination token received
/// @return sourceTokenAmountUsed source token amount used
function swapExternal(
address sourceToken,
address destToken,
address receiver,
address returnToSender,
uint256 sourceTokenAmount,
uint256 requiredDestTokenAmount,
bytes calldata swapData
)
external
payable
returns (
uint256 destTokenAmountReceived,
uint256 sourceTokenAmountUsed
);
/// @dev swap thru external integration using GAS
/// @param sourceToken source token address
/// @param destToken destintaion token address
/// @param receiver address to receive tokens
/// @param returnToSender TODO
/// @param gasTokenUser user address of the GAS token
/// @param sourceTokenAmount source token amount
/// @param requiredDestTokenAmount destination token amount
/// @param swapData TODO
/// @return destTokenAmountReceived destination token received
/// @return sourceTokenAmountUsed source token amount used
function swapExternalWithGasToken(
address sourceToken,
address destToken,
address receiver,
address returnToSender,
address gasTokenUser,
uint256 sourceTokenAmount,
uint256 requiredDestTokenAmount,
bytes calldata swapData
)
external
payable
returns (
uint256 destTokenAmountReceived,
uint256 sourceTokenAmountUsed
);
/// @dev calculate simulated return of swap
/// @param sourceToken source token address
/// @param destToken destination token address
/// @param sourceTokenAmount source token amount
/// @return amoun denominated in destination token
function getSwapExpectedReturn(
address sourceToken,
address destToken,
uint256 sourceTokenAmount,
bytes calldata swapData
) external view returns (uint256);
function owner() external view returns (address);
function transferOwnership(address newOwner) external;
/// Guardian Interface
function _isPaused(bytes4 sig) external view returns (bool isPaused);
function toggleFunctionPause(bytes4 sig) external;
function toggleFunctionUnPause(bytes4 sig) external;
function changeGuardian(address newGuardian) external;
function getGuardian() external view returns (address guardian);
/// Loan Cleanup Interface
function cleanupLoans(
address loanToken,
bytes32[] calldata loanIds)
external
payable
returns (uint256 totalPrincipalIn);
struct LoanParams {
bytes32 id;
bool active;
address owner;
address loanToken;
address collateralToken;
uint256 minInitialMargin;
uint256 maintenanceMargin;
uint256 maxLoanTerm;
}
struct LoanOpenData {
bytes32 loanId;
uint256 principal;
uint256 collateral;
}
enum LoanType {
All,
Margin,
NonMargin
}
struct LoanReturnData {
bytes32 loanId;
uint96 endTimestamp;
address loanToken;
address collateralToken;
uint256 principal;
uint256 collateral;
uint256 interestOwedPerDay;
uint256 interestDepositRemaining;
uint256 startRate;
uint256 startMargin;
uint256 maintenanceMargin;
uint256 currentMargin;
uint256 maxLoanTerm;
uint256 maxLiquidatable;
uint256 maxSeizable;
uint256 depositValueAsLoanToken;
uint256 depositValueAsCollateralToken;
}
enum FeeClaimType {
All,
Lending,
Trading,
Borrowing
}
struct Loan {
bytes32 id; // id of the loan
bytes32 loanParamsId; // the linked loan params id
bytes32 pendingTradesId; // the linked pending trades id
uint256 principal; // total borrowed amount outstanding
uint256 collateral; // total collateral escrowed for the loan
uint256 startTimestamp; // loan start time
uint256 endTimestamp; // for active loans, this is the expected loan end time, for in-active loans, is the actual (past) end time
uint256 startMargin; // initial margin when the loan opened
uint256 startRate; // reference rate when the loan opened for converting collateralToken to loanToken
address borrower; // borrower of this loan
address lender; // lender of this loan
bool active; // if false, the loan has been fully closed
}
struct LenderInterest {
uint256 principalTotal; // total borrowed amount outstanding of asset
uint256 owedPerDay; // interest owed per day for all loans of asset
uint256 owedTotal; // total interest owed for all loans of asset (assuming they go to full term)
uint256 paidTotal; // total interest paid so far for asset
uint256 updatedTimestamp; // last update
}
struct LoanInterest {
uint256 owedPerDay; // interest owed per day for loan
uint256 depositTotal; // total escrowed interest for loan
uint256 updatedTimestamp; // last update
}
////// Flash Borrow Fees //////
function payFlashBorrowFees(
address user,
uint256 borrowAmount,
uint256 flashBorrowFeePercent)
external;
}
/**
* Copyright 2017-2022, OokiDao. All Rights Reserved.
* Licensed under the Apache License, Version 2.0.
*/
pragma solidity >=0.5.0 <=0.8.4;
interface IPriceFeeds {
function queryRate(
address sourceToken,
address destToken)
external
view
returns (uint256 rate, uint256 precision);
function queryPrecision(
address sourceToken,
address destToken)
external
view
returns (uint256 precision);
function queryReturn(
address sourceToken,
address destToken,
uint256 sourceAmount)
external
view
returns (uint256 destAmount);
function checkPriceDisagreement(
address sourceToken,
address destToken,
uint256 sourceAmount,
uint256 destAmount,
uint256 maxSlippage)
external
view
returns (uint256 sourceToDestSwapRate);
function amountInEth(
address Token,
uint256 amount)
external
view
returns (uint256 ethAmount);
function getMaxDrawdown(
address loanToken,
address collateralToken,
uint256 loanAmount,
uint256 collateralAmount,
uint256 maintenanceMargin)
external
view
returns (uint256);
function getCurrentMarginAndCollateralSize(
address loanToken,
address collateralToken,
uint256 loanAmount,
uint256 collateralAmount)
external
view
returns (uint256 currentMargin, uint256 collateralInEthAmount);
function getCurrentMargin(
address loanToken,
address collateralToken,
uint256 loanAmount,
uint256 collateralAmount)
external
view
returns (uint256 currentMargin, uint256 collateralToLoanRate);
function shouldLiquidate(
address loanToken,
address collateralToken,
uint256 loanAmount,
uint256 collateralAmount,
uint256 maintenanceMargin)
external
view
returns (bool);
function getFastGasPrice(
address payToken)
external
view
returns (uint256);
}