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Contract Name:
iTokenV2
Compiler Version
v0.6.12+commit.27d51765
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "./iToken.sol";
/**
* @title dForce's Lending Protocol Contract.
* @notice iTokens which wrap an EIP-20 underlying.
* @author dForce Team.
*/
contract iTokenV2 is iToken {
uint256 public accrualBlockTimestamp;
function _getInterestUnit()
internal
view
virtual
override
returns (uint256)
{
return block.timestamp;
}
function getAccrualInterestUnit()
public
view
virtual
override
returns (uint256)
{
return accrualBlockTimestamp;
}
function _updateAccrualInterestUnit(
uint256 _unit
) internal virtual override {
accrualBlockTimestamp = _unit;
}
// Record time to calculate interests later.
function _upgrade() external onlyOwner {
require(accrualBlockTimestamp == 0, "_upgrade: Have upgraded!");
_updateAccrualInterestUnit(block.timestamp);
}
/**
* @dev Sets a new interest rate model.
* @param _newInterestRateModel The new interest rate model.
*/
function _setInterestRateModel(
IInterestRateModel _newInterestRateModel
) external virtual override onlyOwner {
// Gets current interest rate model.
IInterestRateModel _oldInterestRateModel = interestRateModel;
// Ensures the input address is the interest model contract.
require(
IInterestRateSecondModelV2(address(_newInterestRateModel))
.isInterestRateSecondModel(),
"_setInterestRateModel: This is not the rate second model contract!"
);
// Set to the new interest rate model.
interestRateModel = _newInterestRateModel;
emit NewInterestRateModel(_oldInterestRateModel, _newInterestRateModel);
}
/**
* @dev Similar to EIP20 transfer, except it handles a False result from `transfer`.
*/
function _doTransferOut(
address payable _recipient,
uint256 _amount
) internal virtual override {
address _dst = controller.beforeTransferUnderlying(
address(this),
address(underlying),
_amount,
_recipient
);
underlying.safeTransfer(_dst, _amount);
}
function _liquidateBorrowInternal(
address _borrower,
uint256 _repayAmount,
address _assetCollateral
) internal virtual override {
require(
msg.sender != _borrower,
"_liquidateBorrowInternal: Liquidator can not be borrower!"
);
// According to the parameter `_repayAmount` to see what is the exact error.
require(
_repayAmount != 0,
"_liquidateBorrowInternal: Liquidate amount should be greater than 0!"
);
// Accrues interest for collateral asset.
Base _dlCollateral = Base(_assetCollateral);
_dlCollateral.updateInterest();
controller.beforeLiquidateBorrow(
address(this),
_assetCollateral,
msg.sender,
_borrower,
_repayAmount
);
require(
_dlCollateral.getAccrualInterestUnit() == _getInterestUnit(),
"_liquidateBorrowInternal: Failed to update block timestamp in collateral asset!"
);
uint256 _actualRepayAmount = _repayInternal(
msg.sender,
_borrower,
_repayAmount
);
// Calculates the number of collateral tokens that will be seized
uint256 _seizeTokens = controller.liquidateCalculateSeizeTokensV2(
address(this),
_assetCollateral,
_actualRepayAmount,
_borrower
);
// If this is also the collateral, calls seizeInternal to avoid re-entrancy,
// otherwise make an external call.
if (_assetCollateral == address(this)) {
_seizeInternal(address(this), msg.sender, _borrower, _seizeTokens);
} else {
_dlCollateral.seize(msg.sender, _borrower, _seizeTokens);
}
controller.afterLiquidateBorrow(
address(this),
_assetCollateral,
msg.sender,
_borrower,
_actualRepayAmount,
_seizeTokens
);
emit LiquidateBorrow(
msg.sender,
_borrower,
_actualRepayAmount,
_assetCollateral,
_seizeTokens
);
}
/**
* @dev Caller redeems assets from the market and caller receives underlying,
* and exit markets.
* @param _redeemiToken The amount of the iToken to redeem.
*/
function redeemFromSelfAndExitMarket(
uint256 _redeemiToken
) external nonReentrant settleInterest {
_redeemInternal(
msg.sender,
_redeemiToken,
_redeemiToken.rmul(_exchangeRateInternal())
);
controller.exitMarketFromiToken(address(this), msg.sender);
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @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 SafeMathUpgradeable {
/**
* @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.
*/
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.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20Upgradeable {
/**
* @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);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20Upgradeable.sol";
import "../../math/SafeMathUpgradeable.sol";
import "../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
using SafeMathUpgradeable for uint256;
using AddressUpgradeable for address;
function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20Upgradeable 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(IERC20Upgradeable 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'
// solhint-disable-next-line max-line-length
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(IERC20Upgradeable token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @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(IERC20Upgradeable 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
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @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
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 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");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(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");
// solhint-disable-next-line avoid-low-level-calls
(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");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private 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
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "../interface/IFlashloanExecutor.sol";
import "../library/SafeRatioMath.sol";
import "./TokenERC20.sol";
/**
* @title dForce's lending Base Contract
* @author dForce
*/
abstract contract Base is TokenERC20 {
using SafeRatioMath for uint256;
/**
* @notice Expects to call only once to create a new lending market.
* @param _name Token name.
* @param _symbol Token symbol.
* @param _controller Core controller contract address.
* @param _interestRateModel Token interest rate model contract address.
*/
function _initialize(
string memory _name,
string memory _symbol,
uint8 _decimals,
IController _controller,
IInterestRateModel _interestRateModel
) internal virtual {
controller = _controller;
interestRateModel = _interestRateModel;
_updateAccrualInterestUnit(_getInterestUnit());
borrowIndex = BASE;
flashloanFeeRatio = 0.0008e18;
protocolFeeRatio = 0.25e18;
__Ownable_init();
__ERC20_init(_name, _symbol, _decimals);
__ReentrancyGuard_init();
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256(
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
),
keccak256(bytes(_name)),
keccak256(bytes("1")),
_getChainId(),
address(this)
)
);
}
/*********************************/
/******** Security Check *********/
/*********************************/
/**
* @notice Check whether is a iToken contract, return false for iMSD contract.
*/
function isiToken() external pure virtual returns (bool) {
return true;
}
//----------------------------------
//******** Main calculation ********
//----------------------------------
struct InterestLocalVars {
uint256 borrowRate;
uint256 currentInterestUnit;
uint256 currentCash;
uint256 totalBorrows;
uint256 totalReserves;
uint256 borrowIndex;
uint256 unitDelta;
uint256 simpleInterestFactor;
uint256 interestAccumulated;
uint256 newTotalBorrows;
uint256 newTotalReserves;
uint256 newBorrowIndex;
}
function _getInterestUnit()
internal
view
virtual
override
returns (uint256)
{
return block.number;
}
function getAccrualInterestUnit()
public
view
virtual
override
returns (uint256)
{
return accrualBlockNumber;
}
function _updateAccrualInterestUnit(
uint256 _unit
) internal virtual override {
accrualBlockNumber = _unit;
}
/**
* @notice Calculates interest and update total borrows and reserves.
* @dev Updates total borrows and reserves with any accumulated interest.
*/
function _updateInterest() internal virtual override {
// When more calls in the same timestamp, only the first one takes effect, so for the
// following calls, nothing updates.
if (_getInterestUnit() != getAccrualInterestUnit()) {
InterestLocalVars memory _vars;
_vars.currentCash = _getCurrentCash();
_vars.totalBorrows = totalBorrows;
_vars.totalReserves = totalReserves;
// Gets the current borrow interest rate.
_vars.borrowRate = interestRateModel.getBorrowRate(
_vars.currentCash,
_vars.totalBorrows,
_vars.totalReserves
);
require(
_vars.borrowRate <= maxBorrowRate,
"_updateInterest: Borrow rate is too high!"
);
// Records the current block number.
_vars.currentInterestUnit = _getInterestUnit();
// Calculates the number of blocks elapsed since the last accrual.
_vars.unitDelta = _vars.currentInterestUnit.sub(
getAccrualInterestUnit()
);
/**
* Calculates the interest accumulated into borrows and reserves and the new index:
* simpleInterestFactor = borrowRate * secsDelta
* interestAccumulated = simpleInterestFactor * totalBorrows
* newTotalBorrows = interestAccumulated + totalBorrows
* newTotalReserves = interestAccumulated * reserveFactor + totalReserves
* newBorrowIndex = simpleInterestFactor * borrowIndex + borrowIndex
*/
_vars.simpleInterestFactor = _vars.borrowRate.mul(_vars.unitDelta);
_vars.interestAccumulated = _vars.simpleInterestFactor.rmul(
_vars.totalBorrows
);
_vars.newTotalBorrows = _vars.interestAccumulated.add(
_vars.totalBorrows
);
_vars.newTotalReserves = reserveRatio
.rmul(_vars.interestAccumulated)
.add(_vars.totalReserves);
_vars.borrowIndex = borrowIndex;
_vars.newBorrowIndex = _vars
.simpleInterestFactor
.rmul(_vars.borrowIndex)
.add(_vars.borrowIndex);
// Writes the previously calculated values into storage.
_updateAccrualInterestUnit(_vars.currentInterestUnit);
borrowIndex = _vars.newBorrowIndex;
totalBorrows = _vars.newTotalBorrows;
totalReserves = _vars.newTotalReserves;
// Emits an `UpdateInterest` event.
emit UpdateInterest(
_vars.currentInterestUnit,
_vars.interestAccumulated,
_vars.newBorrowIndex,
_vars.currentCash,
_vars.newTotalBorrows,
_vars.newTotalReserves
);
}
}
struct MintLocalVars {
uint256 exchangeRate;
uint256 mintTokens;
uint256 actualMintAmout;
}
/**
* @dev User deposits token into the market and `_recipient` gets iToken.
* @param _recipient The address of the user to get iToken.
* @param _mintAmount The amount of the underlying token to deposit.
*/
function _mintInternal(
address _recipient,
uint256 _mintAmount
) internal virtual {
controller.beforeMint(address(this), _recipient, _mintAmount);
MintLocalVars memory _vars;
/**
* Gets the current exchange rate and calculate the number of iToken to be minted:
* mintTokens = mintAmount / exchangeRate
*/
_vars.exchangeRate = _exchangeRateInternal();
// Transfers `_mintAmount` from caller to contract, and returns the actual amount the contract
// get, cause some tokens may be charged.
_vars.actualMintAmout = _doTransferIn(msg.sender, _mintAmount);
// Supports deflationary tokens.
_vars.mintTokens = _vars.actualMintAmout.rdiv(_vars.exchangeRate);
// Mints `mintTokens` iToken to `_recipient`.
_mint(_recipient, _vars.mintTokens);
require(
totalSupply >= TOTAL_SUPPLY_THRESHOLD,
"_mintInternal: totalSupply too small!"
);
controller.afterMint(
address(this),
_recipient,
_mintAmount,
_vars.mintTokens
);
emit Mint(msg.sender, _recipient, _mintAmount, _vars.mintTokens);
}
/**
* @notice This is a common function to redeem, so only one of `_redeemiTokenAmount` or
* `_redeemUnderlyingAmount` may be non-zero.
* @dev Caller redeems undelying token based on the input amount of iToken or underlying token.
* @param _from The address of the account which will spend underlying token.
* @param _redeemiTokenAmount The number of iTokens to redeem into underlying.
* @param _redeemUnderlyingAmount The number of underlying tokens to receive.
*/
function _redeemInternal(
address _from,
uint256 _redeemiTokenAmount,
uint256 _redeemUnderlyingAmount
) internal virtual {
require(
_redeemiTokenAmount > 0,
"_redeemInternal: Redeem iToken amount should be greater than zero!"
);
controller.beforeRedeem(address(this), _from, _redeemiTokenAmount);
_burnFrom(_from, _redeemiTokenAmount);
// Allow totalSupply reset to 0
require(
totalSupply >= TOTAL_SUPPLY_THRESHOLD || totalSupply == 0,
"_redeemInternal: totalSupply too small!"
);
/**
* Transfers `_redeemUnderlyingAmount` underlying token to caller.
*/
_doTransferOut(msg.sender, _redeemUnderlyingAmount);
controller.afterRedeem(
address(this),
_from,
_redeemiTokenAmount,
_redeemUnderlyingAmount
);
emit Redeem(
_from,
msg.sender,
_redeemiTokenAmount,
_redeemUnderlyingAmount
);
}
/**
* @dev Caller borrows assets from the protocol.
* @param _borrower The account that will borrow tokens.
* @param _borrowAmount The amount of the underlying asset to borrow.
*/
function _borrowInternal(
address payable _borrower,
uint256 _borrowAmount
) internal virtual {
controller.beforeBorrow(address(this), _borrower, _borrowAmount);
// Calculates the new borrower and total borrow balances:
// newAccountBorrows = accountBorrows + borrowAmount
// newTotalBorrows = totalBorrows + borrowAmount
BorrowSnapshot storage borrowSnapshot = accountBorrows[_borrower];
borrowSnapshot.principal = _borrowBalanceInternal(_borrower).add(
_borrowAmount
);
borrowSnapshot.interestIndex = borrowIndex;
totalBorrows = totalBorrows.add(_borrowAmount);
// Transfers token to borrower.
_doTransferOut(_borrower, _borrowAmount);
controller.afterBorrow(address(this), _borrower, _borrowAmount);
emit Borrow(
_borrower,
_borrowAmount,
borrowSnapshot.principal,
borrowSnapshot.interestIndex,
totalBorrows
);
}
/**
* @notice Please approve enough amount at first!!! If not,
* maybe you will get an error: `SafeMath: subtraction overflow`
* @dev `_payer` repays `_repayAmount` tokens for `_borrower`.
* @param _payer The account to pay for the borrowed.
* @param _borrower The account with the debt being payed off.
* @param _repayAmount The amount to repay (or -1 for max).
*/
function _repayInternal(
address _payer,
address _borrower,
uint256 _repayAmount
) internal virtual returns (uint256) {
controller.beforeRepayBorrow(
address(this),
_payer,
_borrower,
_repayAmount
);
// Calculates the latest borrowed amount by the new market borrowed index.
uint256 _accountBorrows = _borrowBalanceInternal(_borrower);
// Transfers the token into the market to repay.
uint256 _actualRepayAmount = _doTransferIn(
_payer,
_repayAmount > _accountBorrows ? _accountBorrows : _repayAmount
);
// Calculates the `_borrower` new borrow balance and total borrow balances:
// accountBorrows[_borrower].principal = accountBorrows - actualRepayAmount
// newTotalBorrows = totalBorrows - actualRepayAmount
// Saves borrower updates.
BorrowSnapshot storage borrowSnapshot = accountBorrows[_borrower];
borrowSnapshot.principal = _accountBorrows.sub(_actualRepayAmount);
borrowSnapshot.interestIndex = borrowIndex;
totalBorrows = totalBorrows < _actualRepayAmount
? 0
: totalBorrows.sub(_actualRepayAmount);
// Defense hook.
controller.afterRepayBorrow(
address(this),
_payer,
_borrower,
_actualRepayAmount
);
emit RepayBorrow(
_payer,
_borrower,
_actualRepayAmount,
borrowSnapshot.principal,
borrowSnapshot.interestIndex,
totalBorrows
);
return _actualRepayAmount;
}
/**
* @dev The caller repays some of borrow and receive collateral.
* @param _borrower The account whose borrow should be liquidated.
* @param _repayAmount The amount to repay.
* @param _assetCollateral The market in which to seize collateral from the borrower.
*/
function _liquidateBorrowInternal(
address _borrower,
uint256 _repayAmount,
address _assetCollateral
) internal virtual {
require(
msg.sender != _borrower,
"_liquidateBorrowInternal: Liquidator can not be borrower!"
);
// According to the parameter `_repayAmount` to see what is the exact error.
require(
_repayAmount != 0,
"_liquidateBorrowInternal: Liquidate amount should be greater than 0!"
);
// Accrues interest for collateral asset.
Base _dlCollateral = Base(_assetCollateral);
_dlCollateral.updateInterest();
controller.beforeLiquidateBorrow(
address(this),
_assetCollateral,
msg.sender,
_borrower,
_repayAmount
);
require(
_dlCollateral.getAccrualInterestUnit() == _getInterestUnit(),
"_liquidateBorrowInternal: Failed to update block timestamp in collateral asset!"
);
uint256 _actualRepayAmount = _repayInternal(
msg.sender,
_borrower,
_repayAmount
);
// Calculates the number of collateral tokens that will be seized
uint256 _seizeTokens = controller.liquidateCalculateSeizeTokens(
address(this),
_assetCollateral,
_actualRepayAmount
);
// If this is also the collateral, calls seizeInternal to avoid re-entrancy,
// otherwise make an external call.
if (_assetCollateral == address(this)) {
_seizeInternal(address(this), msg.sender, _borrower, _seizeTokens);
} else {
_dlCollateral.seize(msg.sender, _borrower, _seizeTokens);
}
controller.afterLiquidateBorrow(
address(this),
_assetCollateral,
msg.sender,
_borrower,
_actualRepayAmount,
_seizeTokens
);
emit LiquidateBorrow(
msg.sender,
_borrower,
_actualRepayAmount,
_assetCollateral,
_seizeTokens
);
}
/**
* @dev Transfers this token to the liquidator.
* @param _seizerToken The contract seizing the collateral.
* @param _liquidator The account receiving seized collateral.
* @param _borrower The account having collateral seized.
* @param _seizeTokens The number of iTokens to seize.
*/
function _seizeInternal(
address _seizerToken,
address _liquidator,
address _borrower,
uint256 _seizeTokens
) internal virtual {
require(
_borrower != _liquidator,
"seize: Liquidator can not be borrower!"
);
controller.beforeSeize(
address(this),
_seizerToken,
_liquidator,
_borrower,
_seizeTokens
);
/**
* Calculates the new _borrower and _liquidator token balances,
* that is transfer `_seizeTokens` iToken from `_borrower` to `_liquidator`.
*/
_transfer(_borrower, _liquidator, _seizeTokens);
// Hook checks.
controller.afterSeize(
address(this),
_seizerToken,
_liquidator,
_borrower,
_seizeTokens
);
}
/**
* @param _account The address whose balance should be calculated.
*/
function _borrowBalanceInternal(
address _account
) internal view virtual returns (uint256) {
// Gets stored borrowed data of the `_account`.
BorrowSnapshot storage borrowSnapshot = accountBorrows[_account];
// If borrowBalance = 0, return 0 directly.
if (borrowSnapshot.principal == 0 || borrowSnapshot.interestIndex == 0)
return 0;
// Calculate new borrow balance with market new borrow index:
// recentBorrowBalance = borrower.borrowBalance * market.borrowIndex / borrower.borrowIndex
return
borrowSnapshot.principal.mul(borrowIndex).divup(
borrowSnapshot.interestIndex
);
}
/**
* @dev Calculates the exchange rate from the underlying token to the iToken.
*/
function _exchangeRateInternal() internal view virtual returns (uint256) {
if (totalSupply == 0) {
// This is the first time to mint, so current exchange rate is equal to initial exchange rate.
return initialExchangeRate;
} else {
// exchangeRate = (totalCash + totalBorrows - totalReserves) / totalSupply
return
_getCurrentCash().add(totalBorrows).sub(totalReserves).rdiv(
totalSupply
);
}
}
function updateInterest() external virtual returns (bool);
/**
* @dev EIP2612 permit function. For more details, please look at here:
* https://eips.ethereum.org/EIPS/eip-2612
* @param _owner The owner of the funds.
* @param _spender The spender.
* @param _value The amount.
* @param _deadline The deadline timestamp, type(uint256).max for max deadline.
* @param _v Signature param.
* @param _s Signature param.
* @param _r Signature param.
*/
function permit(
address _owner,
address _spender,
uint256 _value,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
) external {
require(_deadline >= block.timestamp, "permit: EXPIRED!");
uint256 _currentNonce = nonces[_owner];
bytes32 _digest = keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(
abi.encode(
PERMIT_TYPEHASH,
_owner,
_spender,
_getChainId(),
_value,
_currentNonce,
_deadline
)
)
)
);
address _recoveredAddress = ecrecover(_digest, _v, _r, _s);
require(
_recoveredAddress != address(0) && _recoveredAddress == _owner,
"permit: INVALID_SIGNATURE!"
);
nonces[_owner] = _currentNonce.add(1);
_approve(_owner, _spender, _value);
}
function _getChainId() internal pure returns (uint256) {
uint256 chainId;
assembly {
chainId := chainid()
}
return chainId;
}
/**
* @dev Transfers this tokens to the liquidator.
* @param _liquidator The account receiving seized collateral.
* @param _borrower The account having collateral seized.
* @param _seizeTokens The number of iTokens to seize.
*/
function seize(
address _liquidator,
address _borrower,
uint256 _seizeTokens
) external virtual;
/**
* @notice Users are expected to have enough allowance and balance before calling.
* @dev Transfers asset in.
*/
function _doTransferIn(
address _sender,
uint256 _amount
) internal virtual returns (uint256);
function exchangeRateStored() external view virtual returns (uint256);
function borrowBalanceStored(
address _account
) external view virtual returns (uint256);
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
abstract contract InterestUnit {
function _getInterestUnit() internal view virtual returns (uint256) {}
function getAccrualInterestUnit() public view virtual returns (uint256) {}
function _updateAccrualInterestUnit(uint256 _unit) internal virtual {}
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "./TokenEvent.sol";
import "./InterestUnit.sol";
/**
* @title dForce's lending Token admin Contract
* @author dForce
*/
abstract contract TokenAdmin is TokenEvent, InterestUnit {
//----------------------------------
//********* Owner Actions **********
//----------------------------------
modifier settleInterest() {
// Accrues interest.
_updateInterest();
require(
getAccrualInterestUnit() == _getInterestUnit(),
"settleInterest: Fail to accrue interest!"
);
_;
}
/**
* @dev Sets a new controller.
*/
function _setController(
IController _newController
) external virtual onlyOwner {
IController _oldController = controller;
// Ensures the input address is a controller contract.
require(
_newController.isController(),
"_setController: This is not the controller contract!"
);
// Sets to new controller.
controller = _newController;
emit NewController(_oldController, _newController);
}
/**
* @dev Sets a new interest rate model.
* @param _newInterestRateModel The new interest rate model.
*/
function _setInterestRateModel(
IInterestRateModel _newInterestRateModel
) external virtual onlyOwner {
// Gets current interest rate model.
IInterestRateModel _oldInterestRateModel = interestRateModel;
// Ensures the input address is the interest model contract.
require(
_newInterestRateModel.isInterestRateModel(),
"_setInterestRateModel: This is not the rate model contract!"
);
// Set to the new interest rate model.
interestRateModel = _newInterestRateModel;
emit NewInterestRateModel(_oldInterestRateModel, _newInterestRateModel);
}
/**
* @dev Sets a new reserve ratio.
*/
function _setNewReserveRatio(
uint256 _newReserveRatio
) external virtual onlyOwner settleInterest {
require(
_newReserveRatio <= maxReserveRatio,
"_setNewReserveRatio: New reserve ratio too large!"
);
// Gets current reserve ratio.
uint256 _oldReserveRatio = reserveRatio;
// Sets new reserve ratio.
reserveRatio = _newReserveRatio;
emit NewReserveRatio(_oldReserveRatio, _newReserveRatio);
}
/**
* @dev Sets a new flashloan fee ratio.
*/
function _setNewFlashloanFeeRatio(
uint256 _newFlashloanFeeRatio
) external virtual onlyOwner settleInterest {
require(
_newFlashloanFeeRatio <= BASE,
"setNewFlashloanFeeRatio: New flashloan ratio too large!"
);
// Gets current reserve ratio.
uint256 _oldFlashloanFeeRatio = flashloanFeeRatio;
// Sets new reserve ratio.
flashloanFeeRatio = _newFlashloanFeeRatio;
emit NewFlashloanFeeRatio(_oldFlashloanFeeRatio, _newFlashloanFeeRatio);
}
/**
* @dev Sets a new protocol fee ratio.
*/
function _setNewProtocolFeeRatio(
uint256 _newProtocolFeeRatio
)
external
virtual
onlyOwner
settleInterest // nonReentrant
{
require(
_newProtocolFeeRatio <= BASE,
"_setNewProtocolFeeRatio: New protocol ratio too large!"
);
// Gets current reserve ratio.
uint256 _oldProtocolFeeRatio = protocolFeeRatio;
// Sets new reserve ratio.
protocolFeeRatio = _newProtocolFeeRatio;
emit NewProtocolFeeRatio(_oldProtocolFeeRatio, _newProtocolFeeRatio);
}
/**
* @dev Admin withdraws `_withdrawAmount` of the iToken.
* @param _withdrawAmount Amount of reserves to withdraw.
*/
function _withdrawReserves(
uint256 _withdrawAmount
)
external
virtual
onlyOwner
settleInterest // nonReentrant
{
require(
_withdrawAmount <= totalReserves &&
_withdrawAmount <= _getCurrentCash(),
"_withdrawReserves: Invalid withdraw amount and do not have enough cash!"
);
uint256 _oldTotalReserves = totalReserves;
// Updates total amount of the reserves.
totalReserves = totalReserves.sub(_withdrawAmount);
// Transfers reserve to the owner.
_doTransferOut(owner, _withdrawAmount);
emit ReservesWithdrawn(
owner,
_withdrawAmount,
totalReserves,
_oldTotalReserves
);
}
/**
* @notice Calculates interest and update total borrows and reserves.
* @dev Updates total borrows and reserves with any accumulated interest.
*/
function _updateInterest() internal virtual;
/**
* @dev Transfers underlying token out.
*/
function _doTransferOut(
address payable _recipient,
uint256 _amount
) internal virtual;
/**
* @dev Total amount of reserves owned by this contract.
*/
function _getCurrentCash() internal view virtual returns (uint256);
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "./TokenAdmin.sol";
/**
* @title dForce's lending Token ERC20 Contract
* @author dForce
*/
abstract contract TokenERC20 is TokenAdmin {
/**
* @dev Transfers `_amount` tokens from `_sender` to `_recipient`.
* @param _sender The address of the source account.
* @param _recipient The address of the destination account.
* @param _amount The number of tokens to transfer.
*/
function _transferTokens(
address _sender,
address _recipient,
uint256 _amount
) internal returns (bool) {
require(
_sender != _recipient,
"_transferTokens: Do not self-transfer!"
);
controller.beforeTransfer(address(this), _sender, _recipient, _amount);
_transfer(_sender, _recipient, _amount);
controller.afterTransfer(address(this), _sender, _recipient, _amount);
return true;
}
//----------------------------------
//********* ERC20 Actions **********
//----------------------------------
/**
* @notice Cause iToken is an ERC20 token, so users can `transfer` them,
* but this action is only allowed when after transferring tokens, the caller
* does not have a shortfall.
* @dev Moves `_amount` tokens from caller to `_recipient`.
* @param _recipient The address of the destination account.
* @param _amount The number of tokens to transfer.
*/
function transfer(
address _recipient,
uint256 _amount
) public virtual override nonReentrant returns (bool) {
return _transferTokens(msg.sender, _recipient, _amount);
}
/**
* @notice Cause iToken is an ERC20 token, so users can `transferFrom` them,
* but this action is only allowed when after transferring tokens, the `_sender`
* does not have a shortfall.
* @dev Moves `_amount` tokens from `_sender` to `_recipient`.
* @param _sender The address of the source account.
* @param _recipient The address of the destination account.
* @param _amount The number of tokens to transfer.
*/
function transferFrom(
address _sender,
address _recipient,
uint256 _amount
) public virtual override nonReentrant returns (bool) {
_approve(
_sender,
msg.sender, // spender
allowance[_sender][msg.sender].sub(_amount)
);
return _transferTokens(_sender, _recipient, _amount);
}
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "./TokenStorage.sol";
/**
* @title dForce's lending Token event Contract
* @author dForce
*/
contract TokenEvent is TokenStorage {
//----------------------------------
//********** User Events ***********
//----------------------------------
event UpdateInterest(
uint256 currentBlockNumber,
uint256 interestAccumulated,
uint256 borrowIndex,
uint256 cash,
uint256 totalBorrows,
uint256 totalReserves
);
event Mint(
address sender,
address recipient,
uint256 mintAmount,
uint256 mintTokens
);
event Redeem(
address from,
address recipient,
uint256 redeemiTokenAmount,
uint256 redeemUnderlyingAmount
);
/**
* @dev Emits when underlying is borrowed.
*/
event Borrow(
address borrower,
uint256 borrowAmount,
uint256 accountBorrows,
uint256 accountInterestIndex,
uint256 totalBorrows
);
event RepayBorrow(
address payer,
address borrower,
uint256 repayAmount,
uint256 accountBorrows,
uint256 accountInterestIndex,
uint256 totalBorrows
);
event LiquidateBorrow(
address liquidator,
address borrower,
uint256 repayAmount,
address iTokenCollateral,
uint256 seizeTokens
);
event Flashloan(
address loaner,
uint256 loanAmount,
uint256 flashloanFee,
uint256 protocolFee,
uint256 timestamp
);
//----------------------------------
//********** Owner Events **********
//----------------------------------
event NewReserveRatio(uint256 oldReserveRatio, uint256 newReserveRatio);
event NewFlashloanFeeRatio(
uint256 oldFlashloanFeeRatio,
uint256 newFlashloanFeeRatio
);
event NewProtocolFeeRatio(
uint256 oldProtocolFeeRatio,
uint256 newProtocolFeeRatio
);
event NewFlashloanFee(
uint256 oldFlashloanFeeRatio,
uint256 newFlashloanFeeRatio,
uint256 oldProtocolFeeRatio,
uint256 newProtocolFeeRatio
);
event NewInterestRateModel(
IInterestRateModel oldInterestRateModel,
IInterestRateModel newInterestRateModel
);
event NewController(IController oldController, IController newController);
event ReservesWithdrawn(
address admin,
uint256 amount,
uint256 newTotalReserves,
uint256 oldTotalReserves
);
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import "../library/Initializable.sol";
import "../library/ReentrancyGuard.sol";
import "../library/Ownable.sol";
import "../library/ERC20.sol";
import "../interface/IInterestRateModel.sol";
import "../interface/IController.sol";
/**
* @title dForce's lending Token storage Contract
* @author dForce
*/
contract TokenStorage is Initializable, ReentrancyGuard, Ownable, ERC20 {
//----------------------------------
//********* Token Storage **********
//----------------------------------
uint256 constant BASE = 1e18;
/**
* @dev Whether this token is supported in the market or not.
*/
bool public constant isSupported = true;
/**
* @dev Maximum borrow rate(0.1% per block, scaled by 1e18).
*/
uint256 constant maxBorrowRate = 0.001e18;
/**
* @dev Interest ratio set aside for reserves(scaled by 1e18).
*/
uint256 public reserveRatio;
/**
* @dev Maximum interest ratio that can be set aside for reserves(scaled by 1e18).
*/
uint256 constant maxReserveRatio = 1e18;
/**
* @notice This ratio is relative to the total flashloan fee.
* @dev Flash loan fee rate(scaled by 1e18).
*/
uint256 public flashloanFeeRatio;
/**
* @notice This ratio is relative to the total flashloan fee.
* @dev Protocol fee rate when a flashloan happens(scaled by 1e18);
*/
uint256 public protocolFeeRatio;
/**
* @dev Underlying token address.
*/
IERC20Upgradeable public underlying;
/**
* @dev Current interest rate model contract.
*/
IInterestRateModel public interestRateModel;
/**
* @dev Core control of the contract.
*/
IController public controller;
/**
* @dev Initial exchange rate(scaled by 1e18).
*/
uint256 constant initialExchangeRate = 1e18;
/**
* @dev The interest index for borrows of asset as of blockNumber.
*/
uint256 public borrowIndex;
/**
* @dev Block number that interest was last accrued at.
*/
uint256 public accrualBlockNumber;
/**
* @dev Total amount of this reserve borrowed.
*/
uint256 public totalBorrows;
/**
* @dev Total amount of this reserves accrued.
*/
uint256 public totalReserves;
/**
* @dev Container for user balance information written to storage.
* @param principal User total balance with accrued interest after applying the user's most recent balance-changing action.
* @param interestIndex The total interestIndex as calculated after applying the user's most recent balance-changing action.
*/
struct BorrowSnapshot {
uint256 principal;
uint256 interestIndex;
}
/**
* @dev 2-level map: userAddress -> assetAddress -> balance for borrows.
*/
mapping(address => BorrowSnapshot) internal accountBorrows;
bytes32 public DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,uint256 chainId, uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH =
0x576144ed657c8304561e56ca632e17751956250114636e8c01f64a7f2c6d98cf;
mapping(address => uint256) public nonces;
/// @notice The threshold of totalSupply, to mitigate exchage rate inflation by donation
uint256 public constant TOTAL_SUPPLY_THRESHOLD = 10_000;
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts-upgradeable/token/ERC20/SafeERC20Upgradeable.sol";
import "./TokenBase/Base.sol";
/**
* @title dForce's Lending Protocol Contract.
* @notice iTokens which wrap an EIP-20 underlying.
* @author dForce Team.
*/
contract iToken is Base {
using SafeERC20Upgradeable for IERC20Upgradeable;
/**
* @notice Expects to call only once to initialize a new market.
* @param _underlyingToken The underlying token address.
* @param _name Token name.
* @param _symbol Token symbol.
* @param _controller Core controller contract address.
* @param _interestRateModel Token interest rate model contract address.
*/
function initialize(
address _underlyingToken,
string memory _name,
string memory _symbol,
IController _controller,
IInterestRateModel _interestRateModel
) external initializer {
require(
address(_underlyingToken) != address(0),
"initialize: underlying address should not be zero address!"
);
require(
address(_controller) != address(0),
"initialize: controller address should not be zero address!"
);
require(
address(_interestRateModel) != address(0),
"initialize: interest model address should not be zero address!"
);
_initialize(
_name,
_symbol,
ERC20(_underlyingToken).decimals(),
_controller,
_interestRateModel
);
underlying = IERC20Upgradeable(_underlyingToken);
}
/**
* @notice In order to support deflationary token, returns the changed amount.
* @dev Similar to EIP20 transfer, except it handles a False result from `transferFrom`.
*/
function _doTransferIn(
address _sender,
uint256 _amount
) internal override returns (uint256) {
uint256 _balanceBefore = underlying.balanceOf(address(this));
underlying.safeTransferFrom(_sender, address(this), _amount);
return underlying.balanceOf(address(this)).sub(_balanceBefore);
}
/**
* @dev Similar to EIP20 transfer, except it handles a False result from `transfer`.
*/
function _doTransferOut(
address payable _recipient,
uint256 _amount
) internal virtual override {
underlying.safeTransfer(_recipient, _amount);
}
/**
* @dev Gets balance of this contract in terms of the underlying
*/
function _getCurrentCash() internal view override returns (uint256) {
return underlying.balanceOf(address(this));
}
/**
* @dev Caller deposits assets into the market and `_recipient` receives iToken in exchange.
* @param _recipient The account that would receive the iToken.
* @param _mintAmount The amount of the underlying token to deposit.
*/
function mint(
address _recipient,
uint256 _mintAmount
) external nonReentrant settleInterest {
_mintInternal(_recipient, _mintAmount);
}
/**
* @dev Caller deposits assets into the market and caller receives iToken in exchange,
* and add markets to caller's markets list for liquidity calculations.
* @param _mintAmount The amount of the underlying token to deposit.
*/
function mintForSelfAndEnterMarket(
uint256 _mintAmount
) external nonReentrant settleInterest {
_mintInternal(msg.sender, _mintAmount);
controller.enterMarketFromiToken(address(this), msg.sender);
}
/**
* @dev Caller redeems specified iToken from `_from` to get underlying token.
* @param _from The account that would burn the iToken.
* @param _redeemiToken The number of iToken to redeem.
*/
function redeem(
address _from,
uint256 _redeemiToken
) external nonReentrant settleInterest {
_redeemInternal(
_from,
_redeemiToken,
_redeemiToken.rmul(_exchangeRateInternal())
);
}
/**
* @dev Caller redeems specified underlying from `_from` to get underlying token.
* @param _from The account that would burn the iToken.
* @param _redeemUnderlying The number of underlying to redeem.
*/
function redeemUnderlying(
address _from,
uint256 _redeemUnderlying
) external nonReentrant settleInterest {
_redeemInternal(
_from,
_redeemUnderlying.rdivup(_exchangeRateInternal()),
_redeemUnderlying
);
}
/**
* @dev Caller borrows tokens from the protocol to their own address.
* @param _borrowAmount The amount of the underlying token to borrow.
*/
function borrow(
uint256 _borrowAmount
) external nonReentrant settleInterest {
_borrowInternal(msg.sender, _borrowAmount);
}
/**
* @dev Caller repays their own borrow.
* @param _repayAmount The amount to repay.
*/
function repayBorrow(
uint256 _repayAmount
) external nonReentrant settleInterest {
_repayInternal(msg.sender, msg.sender, _repayAmount);
}
/**
* @dev Caller repays a borrow belonging to borrower.
* @param _borrower the account with the debt being payed off.
* @param _repayAmount The amount to repay.
*/
function repayBorrowBehalf(
address _borrower,
uint256 _repayAmount
) external nonReentrant settleInterest {
_repayInternal(msg.sender, _borrower, _repayAmount);
}
/**
* @dev The caller liquidates the borrowers collateral.
* @param _borrower The account whose borrow should be liquidated.
* @param _assetCollateral The market in which to seize collateral from the borrower.
* @param _repayAmount The amount to repay.
*/
function liquidateBorrow(
address _borrower,
uint256 _repayAmount,
address _assetCollateral
) external nonReentrant settleInterest {
_liquidateBorrowInternal(_borrower, _repayAmount, _assetCollateral);
}
/**
* @dev Transfers this tokens to the liquidator.
* @param _liquidator The account receiving seized collateral.
* @param _borrower The account having collateral seized.
* @param _seizeTokens The number of iTokens to seize.
*/
function seize(
address _liquidator,
address _borrower,
uint256 _seizeTokens
) external override nonReentrant {
_seizeInternal(msg.sender, _liquidator, _borrower, _seizeTokens);
}
/**
* @notice Calculates interest and update total borrows and reserves.
* @dev Updates total borrows and reserves with any accumulated interest.
*/
function updateInterest() external override returns (bool) {
_updateInterest();
return true;
}
/**
* @dev Gets the newest exchange rate by accruing interest.
*/
function exchangeRateCurrent() external returns (uint256) {
// Accrues interest.
_updateInterest();
return _exchangeRateInternal();
}
/**
* @dev Calculates the exchange rate without accruing interest.
*/
function exchangeRateStored() external view override returns (uint256) {
return _exchangeRateInternal();
}
/**
* @dev Gets the underlying balance of the `_account`.
* @param _account The address of the account to query.
*/
function balanceOfUnderlying(address _account) external returns (uint256) {
// Accrues interest.
_updateInterest();
return _exchangeRateInternal().rmul(balanceOf[_account]);
}
/**
* @dev Gets the user's borrow balance with the latest `borrowIndex`.
*/
function borrowBalanceCurrent(
address _account
) external nonReentrant returns (uint256) {
// Accrues interest.
_updateInterest();
return _borrowBalanceInternal(_account);
}
/**
* @dev Gets the borrow balance of user without accruing interest.
*/
function borrowBalanceStored(
address _account
) external view override returns (uint256) {
return _borrowBalanceInternal(_account);
}
/**
* @dev Gets user borrowing information.
*/
function borrowSnapshot(
address _account
) external view returns (uint256, uint256) {
return (
accountBorrows[_account].principal,
accountBorrows[_account].interestIndex
);
}
/**
* @dev Gets the current total borrows by accruing interest.
*/
function totalBorrowsCurrent() external returns (uint256) {
// Accrues interest.
_updateInterest();
return totalBorrows;
}
/**
* @dev Returns the current per-unit(block/second) borrow interest rate.
*/
function borrowRatePerUnit() public view returns (uint256) {
return
interestRateModel.getBorrowRate(
_getCurrentCash(),
totalBorrows,
totalReserves
);
}
/**
* @dev Returns the current per-unit(block/second) supply interest rate.
* Calculates the supply rate:
* underlying = totalSupply × exchangeRate
* borrowsPer = totalBorrows ÷ underlying
* supplyRate = borrowRate × (1-reserveFactor) × borrowsPer
*/
function supplyRatePerUnit() external view returns (uint256) {
// `_underlyingScaled` is scaled by 1e36.
uint256 _underlyingScaled = totalSupply.mul(_exchangeRateInternal());
if (_underlyingScaled == 0) return 0;
uint256 _totalBorrowsScaled = totalBorrows.mul(BASE);
return
borrowRatePerUnit().tmul(
BASE.sub(reserveRatio),
_totalBorrowsScaled.rdiv(_underlyingScaled)
);
}
/**
* @dev Get cash balance of this iToken in the underlying token.
*/
function getCash() external view returns (uint256) {
return _getCurrentCash();
}
}//SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IControllerAdminV1 {
/// @notice Emitted when an admin supports a market
event MarketAdded(
address iToken,
uint256 collateralFactor,
uint256 borrowFactor,
uint256 supplyCapacity,
uint256 borrowCapacity,
uint256 distributionFactor
);
function _addMarket(
address _iToken,
uint256 _collateralFactor,
uint256 _borrowFactor,
uint256 _supplyCapacity,
uint256 _borrowCapacity,
uint256 _distributionFactor
) external;
/// @notice Emitted when new price oracle is set
event NewPriceOracle(address oldPriceOracle, address newPriceOracle);
function _setPriceOracle(address newOracle) external;
/// @notice Emitted when close factor is changed by admin
event NewCloseFactor(
uint256 oldCloseFactorMantissa,
uint256 newCloseFactorMantissa
);
function _setCloseFactor(uint256 newCloseFactorMantissa) external;
/// @notice Emitted when liquidation incentive is changed by admin
event NewLiquidationIncentive(
uint256 oldLiquidationIncentiveMantissa,
uint256 newLiquidationIncentiveMantissa
);
function _setLiquidationIncentive(
uint256 newLiquidationIncentiveMantissa
) external;
/// @notice Emitted when iToken's collateral factor is changed by admin
event NewCollateralFactor(
address iToken,
uint256 oldCollateralFactorMantissa,
uint256 newCollateralFactorMantissa
);
function _setCollateralFactor(
address iToken,
uint256 newCollateralFactorMantissa
) external;
/// @notice Emitted when iToken's borrow factor is changed by admin
event NewBorrowFactor(
address iToken,
uint256 oldBorrowFactorMantissa,
uint256 newBorrowFactorMantissa
);
function _setBorrowFactor(
address iToken,
uint256 newBorrowFactorMantissa
) external;
/// @notice Emitted when iToken's borrow capacity is changed by admin
event NewBorrowCapacity(
address iToken,
uint256 oldBorrowCapacity,
uint256 newBorrowCapacity
);
function _setBorrowCapacity(
address iToken,
uint256 newBorrowCapacity
) external;
/// @notice Emitted when iToken's supply capacity is changed by admin
event NewSupplyCapacity(
address iToken,
uint256 oldSupplyCapacity,
uint256 newSupplyCapacity
);
function _setSupplyCapacity(
address iToken,
uint256 newSupplyCapacity
) external;
/// @notice Emitted when pause guardian is changed by admin
event NewPauseGuardian(address oldPauseGuardian, address newPauseGuardian);
function _setPauseGuardian(address newPauseGuardian) external;
/// @notice Emitted when mint is paused/unpaused by admin or pause guardian
event MintPaused(address iToken, bool paused);
function _setMintPaused(address iToken, bool paused) external;
function _setAllMintPaused(bool paused) external;
/// @notice Emitted when redeem is paused/unpaused by admin or pause guardian
event RedeemPaused(address iToken, bool paused);
function _setRedeemPaused(address iToken, bool paused) external;
function _setAllRedeemPaused(bool paused) external;
/// @notice Emitted when borrow is paused/unpaused by admin or pause guardian
event BorrowPaused(address iToken, bool paused);
function _setBorrowPaused(address iToken, bool paused) external;
function _setAllBorrowPaused(bool paused) external;
/// @notice Emitted when transfer is paused/unpaused by admin or pause guardian
event TransferPaused(bool paused);
function _setTransferPaused(bool paused) external;
/// @notice Emitted when seize is paused/unpaused by admin or pause guardian
event SeizePaused(bool paused);
function _setSeizePaused(bool paused) external;
function _setiTokenPaused(address iToken, bool paused) external;
function _setProtocolPaused(bool paused) external;
event NewRewardDistributor(
address oldRewardDistributor,
address _newRewardDistributor
);
function _setRewardDistributor(address _newRewardDistributor) external;
}
interface IControllerPolicyV1 {
function beforeMint(
address iToken,
address account,
uint256 mintAmount
) external;
function afterMint(
address iToken,
address minter,
uint256 mintAmount,
uint256 mintedAmount
) external;
function beforeRedeem(
address iToken,
address redeemer,
uint256 redeemAmount
) external;
function afterRedeem(
address iToken,
address redeemer,
uint256 redeemAmount,
uint256 redeemedAmount
) external;
function beforeBorrow(
address iToken,
address borrower,
uint256 borrowAmount
) external;
function afterBorrow(
address iToken,
address borrower,
uint256 borrowedAmount
) external;
function beforeRepayBorrow(
address iToken,
address payer,
address borrower,
uint256 repayAmount
) external;
function afterRepayBorrow(
address iToken,
address payer,
address borrower,
uint256 repayAmount
) external;
function beforeLiquidateBorrow(
address iTokenBorrowed,
address iTokenCollateral,
address liquidator,
address borrower,
uint256 repayAmount
) external;
function afterLiquidateBorrow(
address iTokenBorrowed,
address iTokenCollateral,
address liquidator,
address borrower,
uint256 repaidAmount,
uint256 seizedAmount
) external;
function beforeSeize(
address iTokenBorrowed,
address iTokenCollateral,
address liquidator,
address borrower,
uint256 seizeAmount
) external;
function afterSeize(
address iTokenBorrowed,
address iTokenCollateral,
address liquidator,
address borrower,
uint256 seizedAmount
) external;
function beforeTransfer(
address iToken,
address from,
address to,
uint256 amount
) external;
function afterTransfer(
address iToken,
address from,
address to,
uint256 amount
) external;
function beforeFlashloan(
address iToken,
address to,
uint256 amount
) external;
function afterFlashloan(
address iToken,
address to,
uint256 amount
) external;
}
interface IControllerAccountEquityV1 {
function calcAccountEquity(
address account
) external view returns (uint256, uint256, uint256, uint256);
function liquidateCalculateSeizeTokens(
address iTokenBorrowed,
address iTokenCollateral,
uint256 actualRepayAmount
) external view returns (uint256);
}
interface IControllerAccountV1 {
function hasEnteredMarket(
address account,
address iToken
) external view returns (bool);
function getEnteredMarkets(
address account
) external view returns (address[] memory);
/// @notice Emitted when an account enters a market
event MarketEntered(address iToken, address account);
function enterMarkets(
address[] calldata iTokens
) external returns (bool[] memory);
function enterMarketFromiToken(address _market, address _account) external;
/// @notice Emitted when an account exits a market
event MarketExited(address iToken, address account);
function exitMarkets(
address[] calldata iTokens
) external returns (bool[] memory);
/// @notice Emitted when an account add a borrow asset
event BorrowedAdded(address iToken, address account);
/// @notice Emitted when an account remove a borrow asset
event BorrowedRemoved(address iToken, address account);
function hasBorrowed(
address account,
address iToken
) external view returns (bool);
function getBorrowedAssets(
address account
) external view returns (address[] memory);
}
interface IControllerV1 is
IControllerAdminV1,
IControllerPolicyV1,
IControllerAccountEquityV1,
IControllerAccountV1
{
/**
* @notice Security checks when updating the comptroller of a market, always expect to return true.
*/
function isController() external view returns (bool);
/**
* @notice Return all of the iTokens
* @return The list of iToken addresses
*/
function getAlliTokens() external view returns (address[] memory);
/**
* @notice Check whether a iToken is listed in controller
* @param _iToken The iToken to check for
* @return true if the iToken is listed otherwise false
*/
function hasiToken(address _iToken) external view returns (bool);
}
interface IControllerV2 {
event NewExtraExplicit(
address _oldExtraExplicit,
address _newExtraExplicit
);
function _setExtraExplicit(address _newExtraExplicit) external;
event NewExtraImplicit(
address _oldExtraImplicit,
address _newExtraImplicit
);
function _setExtraImplicit(address _newExtraImplicit) external;
function _upgrade(
address _newExtraImplicit,
address _newExtraExplicit
) external;
/**
* @param _iToken The _iToken to add
* @param _collateralFactor The _collateralFactor of _iToken
* @param _borrowFactor The _borrowFactor of _iToken
* @param _supplyCapacity The _supplyCapacity of _iToken
* @param _borrowCapacity The _borrowCapacity of _iToken
* @param _distributionFactor The _distributionFactor of _iToken
* @param _iTokenSModeID The SMode ID of _iToken
* @param _sModeLtv The collateral factor of _iToken in the sMode
* @param _sModeLiqThreshold The liquidation Threshold of _iToken in the sMode
* @param _liquidationThreshold The liquidation Threshold of _iToken
* @param _debtCeiling The _debtCeiling of _iToken in segregation mode, notice its decimal `DEBT_CEILING_DECIMALS`
* @param _borrowableInSegregation True if the _iToken is borrowable in segregation mode
*/
struct AddMarketV2LocalVars {
address _iToken;
uint256 _collateralFactor;
uint256 _borrowFactor;
uint256 _supplyCapacity;
uint256 _borrowCapacity;
uint256 _distributionFactor;
uint8 _sModeID;
uint256 _sModeLtv;
uint256 _sModeLiqThreshold;
uint256 _liquidationThreshold;
uint256 _debtCeiling;
bool _borrowableInSegregation;
}
function _addMarketV2(AddMarketV2LocalVars memory _vars) external;
function exitMarketFromiToken(address _market, address _account) external;
}
interface IControllerV2ExtraBase {
event DebtCeilingChanged(
address iToken,
uint256 oldDebtCeiling,
uint256 newDebtCeiling
);
event BorrowableInSegregationChanged(address iToken, bool borrowable);
event NewTimeLock(address oldTimeLock, address newTimeLock);
event NewTimeLockStrategy(
address oldTimeLockStrategy,
address newTimeLockStrategy
);
event SModeAdded(
uint8 sModeId,
uint256 liquidationIncentive,
uint256 closeFactor,
string label
);
event SModeChanged(
address iToken,
uint8 oldCategoryId,
uint8 newCategoryId
);
event NewLiquidationThreshold(
address _iToken,
uint256 _oldLiquidationThresholdMantissa,
uint256 _newLiquidationThresholdMantissa
);
event NewSModeLiquidationIncentive(
uint8 _sModeID,
uint256 _oldSModeLiquidationIncentive,
uint256 _newSModeLiquidationIncentive
);
event NewSModeCloseFactor(
uint8 _sModeID,
uint256 _oldSModeCloseFactor,
uint256 _newSModeCloseFactor
);
event NewSModeLTV(
address _iToken,
uint256 _oldSModeLTV,
uint256 _newSModeLTV
);
event NewSModeLiquidationThreshold(
address _iToken,
uint256 _oldSModeLiquidationThreshold,
uint256 _newSModeLiquidationThreshold
);
event SModeEntered(uint8 oldSModeId, uint8 newSModeId, address account);
function getSegregationModeState(
address _account
) external view returns (bool, address);
function getLiquidationIncentive(
address _iToken,
address _account
) external view returns (uint256);
}
interface IControllerV2ExtraExplicit is IControllerV2ExtraBase {
function isControllerExtraExplicit() external view returns (bool);
function initialize() external;
function _upgrade() external;
function _addMarketV2(
IControllerV2.AddMarketV2LocalVars memory _vars
) external;
function _setCollateralFactor(
address iToken,
uint256 newCollateralFactorMantissa
) external;
function _setCloseFactor(uint256 newCloseFactorMantissa) external;
function _setLiquidationIncentive(
uint256 newLiquidationIncentiveMantissa
) external;
function beforeBorrow(
address iToken,
address borrower,
uint256 borrowAmount
) external;
function afterRepayBorrow(
address iToken,
address payer,
address borrower,
uint256 repayAmount
) external;
function beforeEnterMarket(address _iToken, address _account) external view;
function getCloseFactor(
address _iToken,
address _account
) external view returns (uint256);
}
interface IControllerV2ExtraImplicit is IControllerV2ExtraBase {
function isControllerExtraImplicit() external view returns (bool);
function _setDebtCeiling(address _iToken, uint256 _newDebtCeiling) external;
function _setBorrowableInSegregation(
address _iToken,
bool _borrowable
) external;
function _setTimeLock(address _newTimeLock) external;
function _setTimeLockStrategy(address _newTimeLockStrategy) external;
function _addSMode(
uint256 _liquidationIncentive,
uint256 _closeFactor,
string memory _label
) external;
function _setSMode(
address _iToken,
uint8 _sModeID,
uint256 _sModeLtv,
uint256 _sModeLiqThreshold
) external;
function _setLiquidationThreshold(
address _iToken,
uint256 _newLiquidationThresholdMantissa
) external;
function _setSModeLiquidationIncentive(
uint8 _sModeID,
uint256 _liquidationIncentive
) external;
function _setSModeCloseFactor(
uint8 _sModeID,
uint256 _closeFactor
) external;
function _setSModeLTV(address _iToken, uint256 _ltv) external;
function _setSModeLiquidationThreshold(
address _iToken,
uint256 _liquidationThreshold
) external;
function beforeTransferUnderlying(
address _asset,
address _underlying,
uint256 _amount,
address _recipient
) external returns (address _dst);
function liquidateCalculateSeizeTokensV2(
address iTokenBorrowed,
address iTokenCollateral,
uint256 actualRepayAmount,
address borrower
) external view returns (uint256);
function calcAccountEquityWithEffectV2(
address _account,
address _tokenToEffect,
uint256 _redeemAmount,
uint256 _borrowAmount,
bool _isLiquidation
) external view returns (uint256, uint256, uint256, uint256);
function enterSMode(uint8 _newSModeId) external;
function getSModeLength() external view returns (uint256 _sModeLength);
function getCollateralFactor(
address _iToken,
uint8 _accountSModeID,
uint8 _iTokenSModeID,
bool _isLiquidation
) external view returns (uint256 _collateralFactor);
function getLTV(address _iToken) external view returns (uint256);
function getLiquidationThreshold(
address _iToken
) external view returns (uint256);
function getSModeLTV(address _iToken) external view returns (uint256);
function getSModeLiquidationThreshold(
address _iToken
) external view returns (uint256);
}
/**
* @dev External Interfaces for test cases and front end
*/
interface IController is
IControllerV1,
IControllerV2,
IControllerV2ExtraImplicit
{
struct MarketV2 {
/*
* Multiplier representing the most one can borrow against their collateral in this market.
* For instance, 0.9 to allow borrowing 90% of collateral value.
* Must be in [0, 0.9], and stored as a mantissa.
*/
uint256 collateralFactorMantissa;
/*
* Multiplier representing the most one can borrow the asset.
* For instance, 0.5 to allow borrowing this asset 50% * collateral value * collateralFactor.
* When calculating equity, 0.5 with 100 borrow balance will produce 200 borrow value
* Must be between (0, 1], and stored as a mantissa.
*/
uint256 borrowFactorMantissa;
/*
* The borrow capacity of the asset, will be checked in beforeBorrow()
* -1 means there is no limit on the capacity
* 0 means the asset can not be borrowed any more
*/
uint256 borrowCapacity;
/*
* The supply capacity of the asset, will be checked in beforeMint()
* -1 means there is no limit on the capacity
* 0 means the asset can not be supplied any more
*/
uint256 supplyCapacity;
// Whether market's mint is paused
bool mintPaused;
// Whether market's redeem is paused
bool redeemPaused;
// Whether market's borrow is paused
bool borrowPaused;
// sMode config
// TODO: explanation
uint8 sModeID;
// Whether market can be borrowed in segregation mode
bool borrowableInSegregation;
// Debt ceiling for the market
uint256 debtCeiling;
// Current debt in segregation mode
uint256 currentDebt;
}
function extraImplicit() external view returns (address);
function extraExplicit() external view returns (address);
function timeLock() external view returns (address);
function timeLockStrategy() external view returns (address);
function marketsV2(address _iToken) external view returns (MarketV2 memory);
function DEBT_CEILING_DECIMALS() external view returns (uint256);
function accountsSMode(
address account
) external view returns (uint8 sModeID);
function sModes(
uint256 index
)
external
view
returns (
uint256 liquidationIncentive,
uint256 closeFactor,
string calldata label
);
function liquidationIncentiveMantissa() external view returns (uint256);
function closeFactorMantissa() external view returns (uint256);
function initializeV2(
address _newExtraImplicit,
address _newExtraExplicit
) external;
function initialize() external;
}//SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
interface IFlashloanExecutor {
function executeOperation(
address reserve,
uint256 amount,
uint256 fee,
bytes memory data
) external;
}//SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @title dForce Lending Protocol's InterestRateModel Interface.
* @author dForce Team.
*/
interface IInterestRateModel {
function isInterestRateModel() external view returns (bool);
/**
* @dev Calculates the current borrow interest rate per block.
* @param cash The total amount of cash the market has.
* @param borrows The total amount of borrows the market has.
* @param reserves The total amnount of reserves the market has.
* @return The borrow rate per block (as a percentage, and scaled by 1e18).
*/
function getBorrowRate(
uint256 cash,
uint256 borrows,
uint256 reserves
) external view returns (uint256);
/**
* @dev Calculates the current supply interest rate per block.
* @param cash The total amount of cash the market has.
* @param borrows The total amount of borrows the market has.
* @param reserves The total amnount of reserves the market has.
* @param reserveRatio The current reserve factor the market has.
* @return The supply rate per block (as a percentage, and scaled by 1e18).
*/
function getSupplyRate(
uint256 cash,
uint256 borrows,
uint256 reserves,
uint256 reserveRatio
) external view returns (uint256);
}
interface IInterestRateSecondModelV2 {
function isInterestRateSecondModel() external view returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.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 guidelines: functions revert instead
* of 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 ERC20 {
using SafeMathUpgradeable for uint256;
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
uint256 public totalSupply;
string public name;
string public symbol;
uint8 public decimals;
/**
* @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 Sets the values for {name} and {symbol}, initializes {decimals} with
* a default value of 18.
*
* To select a different value for {decimals}, use {_setupDecimals}.
*
* All three of these values are immutable: they can only be set once during
* construction.
*/
function __ERC20_init(
string memory name_,
string memory symbol_,
uint8 decimals_
) internal {
name = name_;
symbol = symbol_;
decimals = decimals_;
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(
address recipient,
uint256 amount
) public virtual returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(
address spender,
uint256 amount
) public virtual returns (bool) {
_approve(msg.sender, 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}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, allowance[sender][msg.sender].sub(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) {
_approve(
msg.sender,
spender,
allowance[msg.sender][spender].add(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) {
_approve(
msg.sender,
spender,
allowance[msg.sender][spender].sub(subtractedValue)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
balanceOf[sender] = balanceOf[sender].sub(amount);
balanceOf[recipient] = balanceOf[recipient].add(amount);
emit Transfer(sender, recipient, 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:
*
* - `to` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
totalSupply = totalSupply.add(amount);
balanceOf[account] = balanceOf[account].add(amount);
emit Transfer(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");
balanceOf[account] = balanceOf[account].sub(amount);
totalSupply = totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance if caller is not the `account`.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller other than `msg.sender` must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function _burnFrom(address account, uint256 amount) internal virtual {
if (msg.sender != account)
_approve(
account,
msg.sender,
allowance[account][msg.sender].sub(amount)
);
_burn(account, 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");
allowance[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @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 a proxied contract can't have 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.
*
* 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 {UpgradeableProxy-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.
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
require(
!_initialized,
"Initializable: contract is already initialized"
);
_;
_initialized = true;
}
}//SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @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.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {_setPendingOwner} and {_acceptOwner}.
*/
contract Ownable {
/**
* @dev Returns the address of the current owner.
*/
address payable public owner;
/**
* @dev Returns the address of the current pending owner.
*/
address payable public pendingOwner;
event NewOwner(address indexed previousOwner, address indexed newOwner);
event NewPendingOwner(
address indexed oldPendingOwner,
address indexed newPendingOwner
);
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner == msg.sender, "onlyOwner: caller is not the owner");
_;
}
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal {
owner = msg.sender;
emit NewOwner(address(0), msg.sender);
}
/**
* @notice Base on the inputing parameter `newPendingOwner` to check the exact error reason.
* @dev Transfer contract control to a new owner. The newPendingOwner must call `_acceptOwner` to finish the transfer.
* @param newPendingOwner New pending owner.
*/
function _setPendingOwner(
address payable newPendingOwner
) external onlyOwner {
require(
newPendingOwner != address(0) && newPendingOwner != pendingOwner,
"_setPendingOwner: New owenr can not be zero address and owner has been set!"
);
// Gets current owner.
address oldPendingOwner = pendingOwner;
// Sets new pending owner.
pendingOwner = newPendingOwner;
emit NewPendingOwner(oldPendingOwner, newPendingOwner);
}
/**
* @dev Accepts the admin rights, but only for pendingOwenr.
*/
function _acceptOwner() external {
require(
msg.sender == pendingOwner,
"_acceptOwner: Only for pending owner!"
);
// Gets current values for events.
address oldOwner = owner;
address oldPendingOwner = pendingOwner;
// Set the new contract owner.
owner = pendingOwner;
// Clear the pendingOwner.
pendingOwner = address(0);
emit NewOwner(oldOwner, owner);
emit NewPendingOwner(oldPendingOwner, pendingOwner);
}
uint256[50] private __gap;
}// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
// abstract contract ReentrancyGuardUpgradeable is Initializable {
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
function __ReentrancyGuard_init() internal {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// 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;
}
uint256[49] private __gap;
}//SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
import "@openzeppelin/contracts-upgradeable/math/SafeMathUpgradeable.sol";
library SafeRatioMath {
using SafeMathUpgradeable for uint256;
uint256 private constant BASE = 10 ** 18;
uint256 private constant DOUBLE = 10 ** 36;
function divup(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = x.add(y.sub(1)).div(y);
}
function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = x.mul(y).div(BASE);
}
function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = x.mul(BASE).div(y);
}
function rdivup(uint256 x, uint256 y) internal pure returns (uint256 z) {
z = x.mul(BASE).add(y.sub(1)).div(y);
}
function tmul(
uint256 x,
uint256 y,
uint256 z
) internal pure returns (uint256 result) {
result = x.mul(y).mul(z).div(DOUBLE);
}
function rpow(
uint256 x,
uint256 n,
uint256 base
) internal pure returns (uint256 z) {
assembly {
switch x
case 0 {
switch n
case 0 {
z := base
}
default {
z := 0
}
}
default {
switch mod(n, 2)
case 0 {
z := base
}
default {
z := x
}
let half := div(base, 2) // for rounding.
for {
n := div(n, 2)
} n {
n := div(n, 2)
} {
let xx := mul(x, x)
if iszero(eq(div(xx, x), x)) {
revert(0, 0)
}
let xxRound := add(xx, half)
if lt(xxRound, xx) {
revert(0, 0)
}
x := div(xxRound, base)
if mod(n, 2) {
let zx := mul(z, x)
if and(iszero(iszero(x)), iszero(eq(div(zx, x), z))) {
revert(0, 0)
}
let zxRound := add(zx, half)
if lt(zxRound, zx) {
revert(0, 0)
}
z := div(zxRound, base)
}
}
}
}
}
}{
"evmVersion": "istanbul",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs",
"useLiteralContent": true
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": [],
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"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":false,"internalType":"address","name":"borrower","type":"address"},{"indexed":false,"internalType":"uint256","name":"borrowAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"accountBorrows","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"accountInterestIndex","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"totalBorrows","type":"uint256"}],"name":"Borrow","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"loaner","type":"address"},{"indexed":false,"internalType":"uint256","name":"loanAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"flashloanFee","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"protocolFee","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"}],"name":"Flashloan","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"liquidator","type":"address"},{"indexed":false,"internalType":"address","name":"borrower","type":"address"},{"indexed":false,"internalType":"uint256","name":"repayAmount","type":"uint256"},{"indexed":false,"internalType":"address","name":"iTokenCollateral","type":"address"},{"indexed":false,"internalType":"uint256","name":"seizeTokens","type":"uint256"}],"name":"LiquidateBorrow","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"mintAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"mintTokens","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"contract IController","name":"oldController","type":"address"},{"indexed":false,"internalType":"contract IController","name":"newController","type":"address"}],"name":"NewController","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"oldFlashloanFeeRatio","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newFlashloanFeeRatio","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"oldProtocolFeeRatio","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newProtocolFeeRatio","type":"uint256"}],"name":"NewFlashloanFee","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"oldFlashloanFeeRatio","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newFlashloanFeeRatio","type":"uint256"}],"name":"NewFlashloanFeeRatio","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"contract IInterestRateModel","name":"oldInterestRateModel","type":"address"},{"indexed":false,"internalType":"contract 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IController","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"exchangeRateCurrent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"exchangeRateStored","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"flashloanFeeRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAccrualInterestUnit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getCash","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_underlyingToken","type":"address"},{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"contract IController","name":"_controller","type":"address"},{"internalType":"contract IInterestRateModel","name":"_interestRateModel","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"interestRateModel","outputs":[{"internalType":"contract IInterestRateModel","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isSupported","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isiToken","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"_borrower","type":"address"},{"internalType":"uint256","name":"_repayAmount","type":"uint256"},{"internalType":"address","name":"_assetCollateral","type":"address"}],"name":"liquidateBorrow","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_mintAmount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_mintAmount","type":"uint256"}],"name":"mintForSelfAndEnterMarket","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingOwner","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"uint256","name":"_deadline","type":"uint256"},{"internalType":"uint8","name":"_v","type":"uint8"},{"internalType":"bytes32","name":"_r","type":"bytes32"},{"internalType":"bytes32","name":"_s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"protocolFeeRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"uint256","name":"_redeemiToken","type":"uint256"}],"name":"redeem","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_redeemiToken","type":"uint256"}],"name":"redeemFromSelfAndExitMarket","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"uint256","name":"_redeemUnderlying","type":"uint256"}],"name":"redeemUnderlying","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_repayAmount","type":"uint256"}],"name":"repayBorrow","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_borrower","type":"address"},{"internalType":"uint256","name":"_repayAmount","type":"uint256"}],"name":"repayBorrowBehalf","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reserveRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_liquidator","type":"address"},{"internalType":"address","name":"_borrower","type":"address"},{"internalType":"uint256","name":"_seizeTokens","type":"uint256"}],"name":"seize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"supplyRatePerUnit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalBorrows","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalBorrowsCurrent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalReserves","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_sender","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"underlying","outputs":[{"internalType":"contract IERC20Upgradeable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"updateInterest","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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Multichain Portfolio | 34 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.