Contract Address Details

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

import "./interfaces/IWeightAggregator.sol";
import "./interfaces/IBuyback.sol";
import "./interfaces/IVesting.sol";
import "./interfaces/IRewardsHub.sol";

contract WeightAggregator is IWeightAggregator {
    uint256 internal constant LOYALTY_SCALE = 1e18;

    IBuyback public immutable buyback;
    IVesting public immutable vesting;
    IRewardsHub public immutable rewardsHub;

    constructor(
        IBuyback buyback_,
        IVesting vesting_,
        IRewardsHub rewardsHub_
    ) {
        buyback = buyback_;
        vesting = vesting_;
        rewardsHub = rewardsHub_;
    }

    /// @inheritdoc IWeightAggregator
    function getAccountFunds(address account) public view returns (uint256) {
        return
            buyback.getStakedAmount(account) +
            vesting.releasableAmount(account) +
            rewardsHub.availableBalanceOf(account);
    }

    function getLoyaltyFactor(address account) external view returns (uint256) {
        return buyback.getLoyaltyFactorForBalance(account, getAccountFunds(account));
    }

    /// @inheritdoc IWeightAggregator
    function getBuybackWeight(address account) external view returns (uint256) {
        if (!buyback.isParticipating(account)) return 0;

        uint256 funds = getAccountFunds(account);
        uint256 loyaltyFactor = buyback.getLoyaltyFactorForBalance(account, funds);
        return funds + (funds * loyaltyFactor) / LOYALTY_SCALE;
    }

    /// @inheritdoc IWeightAggregator
    function getVotingWeight(address account) external view returns (uint256) {
        if (!buyback.isParticipating(account)) return 0;

        uint256 funds = getAccountFunds(account);
        uint256 loyaltyFactor = buyback.getLoyaltyFactorForBalance(account, funds);

        uint256 votes = buyback.getStakedAmount(account) +
            vesting.getReleasableWithoutCliff(account) +
            rewardsHub.totalBalanceOf(account);
        return votes + (votes * loyaltyFactor) / LOYALTY_SCALE;
    }
}
        

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

import "./IRewardsHubLight.sol";

interface IRewardsHub is IRewardsHubLight {
    event RewardUnlocked(address account, uint256 amount);

    /**
     * @notice Gets summary amount of available and delayed balances of an account.
     */
    function totalBalanceOf(address account) external view override returns (uint256);

    /**
     * @notice Gets part of delayed rewards that is unlocked and have become available.
     */
    function getUnlockableRewards(address account) external view returns (uint256);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)

pragma solidity ^0.8.0;

/**
 * @dev External interface of AccessControl declared to support ERC165 detection.
 */
interface IAccessControl {
    /**
     * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
     *
     * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
     * {RoleAdminChanged} not being emitted signaling this.
     *
     * _Available since v3.1._
     */
    event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);

    /**
     * @dev Emitted when `account` is granted `role`.
     *
     * `sender` is the account that originated the contract call, an admin role
     * bearer except when using {AccessControl-_setupRole}.
     */
    event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Emitted when `account` is revoked `role`.
     *
     * `sender` is the account that originated the contract call:
     *   - if using `revokeRole`, it is the admin role bearer
     *   - if using `renounceRole`, it is the role bearer (i.e. `account`)
     */
    event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) external view returns (bool);

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {AccessControl-_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) external view returns (bytes32);

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function grantRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from `account`.
     *
     * If `account` had been granted `role`, emits a {RoleRevoked} event.
     *
     * Requirements:
     *
     * - the caller must have ``role``'s admin role.
     */
    function revokeRole(bytes32 role, address account) external;

    /**
     * @dev Revokes `role` from the calling account.
     *
     * Roles are often managed via {grantRole} and {revokeRole}: this function's
     * purpose is to provide a mechanism for accounts to lose their privileges
     * if they are compromised (such as when a trusted device is misplaced).
     *
     * If the calling account had been granted `role`, emits a {RoleRevoked}
     * event.
     *
     * Requirements:
     *
     * - the caller must be `account`.
     */
    function renounceRole(bytes32 role, address account) external;
}
          

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

import "@openzeppelin/contracts/interfaces/IERC3156FlashLender.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import "@openzeppelin/contracts/access/IAccessControl.sol";
import "./IInterestRateModel.sol";

interface IMToken is IAccessControl, IERC20, IERC3156FlashLender, IERC165 {
    /**
     * @notice Event emitted when interest is accrued
     */
    event AccrueInterest(
        uint256 cashPrior,
        uint256 interestAccumulated,
        uint256 borrowIndex,
        uint256 totalBorrows,
        uint256 totalProtocolInterest
    );

    /**
     * @notice Event emitted when tokens are lended
     */
    event Lend(address lender, uint256 lendAmount, uint256 lendTokens, uint256 newTotalTokenSupply);

    /**
     * @notice Event emitted when tokens are redeemed
     */
    event Redeem(address redeemer, uint256 redeemAmount, uint256 redeemTokens, uint256 newTotalTokenSupply);

    /**
     * @notice Event emitted when underlying is borrowed
     */
    event Borrow(address borrower, uint256 borrowAmount, uint256 accountBorrows, uint256 totalBorrows);

    /**
     * @notice Event emitted when tokens are seized
     */
    event Seize(
        address borrower,
        address receiver,
        uint256 seizeTokens,
        uint256 accountsTokens,
        uint256 totalSupply,
        uint256 seizeUnderlyingAmount
    );

    /**
     * @notice Event emitted when a borrow is repaid
     */
    event RepayBorrow(
        address payer,
        address borrower,
        uint256 repayAmount,
        uint256 accountBorrows,
        uint256 totalBorrows
    );

    /**
     * @notice Event emitted when a borrow is repaid during autoliquidation
     */
    event AutoLiquidationRepayBorrow(
        address borrower,
        uint256 repayAmount,
        uint256 accountBorrowsNew,
        uint256 totalBorrowsNew,
        uint256 TotalProtocolInterestNew
    );

    /**
     * @notice Event emitted when flash loan is executed
     */
    event FlashLoanExecuted(address receiver, uint256 amount, uint256 fee);

    /**
     * @notice Event emitted when interestRateModel is changed
     */
    event NewMarketInterestRateModel(IInterestRateModel oldInterestRateModel, IInterestRateModel newInterestRateModel);

    /**
     * @notice Event emitted when the protocol interest factor is changed
     */
    event NewProtocolInterestFactor(
        uint256 oldProtocolInterestFactorMantissa,
        uint256 newProtocolInterestFactorMantissa
    );

    /**
     * @notice Event emitted when the flash loan max share is changed
     */
    event NewFlashLoanMaxShare(uint256 oldMaxShare, uint256 newMaxShare);

    /**
     * @notice Event emitted when the flash loan fee is changed
     */
    event NewFlashLoanFee(uint256 oldFee, uint256 newFee);

    /**
     * @notice Event emitted when the protocol interest are added
     */
    event ProtocolInterestAdded(address benefactor, uint256 addAmount, uint256 newTotalProtocolInterest);

    /**
     * @notice Event emitted when the protocol interest reduced
     */
    event ProtocolInterestReduced(address admin, uint256 reduceAmount, uint256 newTotalProtocolInterest);

    /**
     * @notice Value is the Keccak-256 hash of "TIMELOCK"
     */
    function TIMELOCK() external view returns (bytes32);

    /**
     * @notice Underlying asset for this MToken
     */
    function underlying() external view returns (IERC20);

    /**
     * @notice EIP-20 token name for this token
     */
    function name() external view returns (string memory);

    /**
     * @notice EIP-20 token symbol for this token
     */
    function symbol() external view returns (string memory);

    /**
     * @notice EIP-20 token decimals for this token
     */
    function decimals() external view returns (uint8);

    /**
     * @notice Model which tells what the current interest rate should be
     */
    function interestRateModel() external view returns (IInterestRateModel);

    /**
     * @notice Initial exchange rate used when lending the first MTokens (used when totalTokenSupply = 0)
     */
    function initialExchangeRateMantissa() external view returns (uint256);

    /**
     * @notice Fraction of interest currently set aside for protocol interest
     */
    function protocolInterestFactorMantissa() external view returns (uint256);

    /**
     * @notice Block number that interest was last accrued at
     */
    function accrualBlockNumber() external view returns (uint256);

    /**
     * @notice Accumulator of the total earned interest rate since the opening of the market
     */
    function borrowIndex() external view returns (uint256);

    /**
     * @notice Total amount of outstanding borrows of the underlying in this market
     */
    function totalBorrows() external view returns (uint256);

    /**
     * @notice Total amount of protocol interest of the underlying held in this market
     */
    function totalProtocolInterest() external view returns (uint256);

    /**
     * @notice Share of market's current underlying token balance that can be used as flash loan (scaled by 1e18).
     */
    function maxFlashLoanShare() external view returns (uint256);

    /**
     * @notice Share of flash loan amount that would be taken as fee (scaled by 1e18).
     */
    function flashLoanFeeShare() external view returns (uint256);

    /**
     * @notice Returns total token supply
     */
    function totalSupply() external view returns (uint256);

    /**
     * @notice Transfer `amount` tokens from `msg.sender` to `dst`
     * @param dst The address of the destination account
     * @param amount The number of tokens to transfer
     * @return Whether or not the transfer succeeded
     */
    function transfer(address dst, uint256 amount) external returns (bool);

    /**
     * @notice Transfer `amount` tokens from `src` to `dst`
     * @param src The address of the source account
     * @param dst The address of the destination account
     * @param amount The number of tokens to transfer
     * @return Whether or not the transfer succeeded
     */
    function transferFrom(
        address src,
        address dst,
        uint256 amount
    ) external returns (bool);

    /**
     * @notice Approve `spender` to transfer up to `amount` from `src`
     * @dev This will overwrite the approval amount for `spender`
     *  and is subject to issues noted [here](https://eips.ethereum.org/EIPS/eip-20#approve)
     * @param spender The address of the account which may transfer tokens
     * @param amount The number of tokens that are approved (-1 means infinite)
     * @return Whether or not the approval succeeded
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @notice Get the current allowance from `owner` for `spender`
     * @param owner The address of the account which owns the tokens to be spent
     * @param spender The address of the account which may transfer tokens
     * @return The number of tokens allowed to be spent (-1 means infinite)
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @notice Get the token balance of the `owner`
     * @param owner The address of the account to query
     * @return The number of tokens owned by `owner`
     */
    function balanceOf(address owner) external view returns (uint256);

    /**
     * @notice Get the underlying balance of the `owner`
     * @dev This also accrues interest in a transaction
     * @param owner The address of the account to query
     * @return The amount of underlying owned by `owner`
     */
    function balanceOfUnderlying(address owner) external returns (uint256);

    /**
     * @notice Get a snapshot of the account's balances, and the cached exchange rate
     * @dev This is used by supervisor to more efficiently perform liquidity checks.
     * @param account Address of the account to snapshot
     * @return (token balance, borrow balance, exchange rate mantissa)
     */
    function getAccountSnapshot(address account)
        external
        view
        returns (
            uint256,
            uint256,
            uint256
        );

    /**
     * @notice Returns the current per-block borrow interest rate for this mToken
     * @return The borrow interest rate per block, scaled by 1e18
     */
    function borrowRatePerBlock() external view returns (uint256);

    /**
     * @notice Returns the current per-block supply interest rate for this mToken
     * @return The supply interest rate per block, scaled by 1e18
     */
    function supplyRatePerBlock() external view returns (uint256);

    /**
     * @notice Returns the current total borrows plus accrued interest
     * @return The total borrows with interest
     */
    function totalBorrowsCurrent() external returns (uint256);

    /**
     * @notice Accrue interest to updated borrowIndex and then calculate account's
     *         borrow balance using the updated borrowIndex
     * @param account The address whose balance should be calculated after updating borrowIndex
     * @return The calculated balance
     */
    function borrowBalanceCurrent(address account) external returns (uint256);

    /**
     * @notice Return the borrow balance of account based on stored data
     * @param account The address whose balance should be calculated
     * @return The calculated balance
     */
    function borrowBalanceStored(address account) external view returns (uint256);

    /**
     * @notice Accrue interest then return the up-to-date exchange rate
     * @return Calculated exchange rate scaled by 1e18
     */
    function exchangeRateCurrent() external returns (uint256);

    /**
     * @notice Calculates the exchange rate from the underlying to the MToken
     * @dev This function does not accrue interest before calculating the exchange rate
     * @return Calculated exchange rate scaled by 1e18
     */
    function exchangeRateStored() external view returns (uint256);

    /**
     * @notice Get cash balance of this mToken in the underlying asset
     * @return The quantity of underlying asset owned by this contract
     */
    function getCash() external view returns (uint256);

    /**
     * @notice Applies accrued interest to total borrows and protocol interest
     * @dev This calculates interest accrued from the last checkpointed block
     *   up to the current block and writes new checkpoint to storage.
     */
    function accrueInterest() external;

    /**
     * @notice Sender supplies assets into the market and receives mTokens in exchange
     * @dev Accrues interest whether or not the operation succeeds, unless reverted
     * @param lendAmount The amount of the underlying asset to supply
     */
    function lend(uint256 lendAmount) external;

    /**
     * @notice Sender redeems mTokens in exchange for the underlying asset
     * @dev Accrues interest whether or not the operation succeeds, unless reverted
     * @param redeemTokens The number of mTokens to redeem into underlying
     */
    function redeem(uint256 redeemTokens) external;

    /**
     * @notice Redeems all mTokens for account in exchange for the underlying asset.
     * Can only be called within the AML system!
     * @dev Accrues interest whether or not the operation succeeds, unless reverted
     * @param account An account that is potentially sanctioned by the AML system
     */
    function redeemByAmlDecision(address account) external;

    /**
     * @notice Sender redeems mTokens in exchange for a specified amount of underlying asset
     * @dev Accrues interest whether or not the operation succeeds, unless reverted
     * @param redeemAmount The amount of underlying to receive from redeeming mTokens
     */
    function redeemUnderlying(uint256 redeemAmount) external;

    /**
     * @notice Sender borrows assets from the protocol to their own address
     * @param borrowAmount The amount of the underlying asset to borrow
     */
    function borrow(uint256 borrowAmount) external;

    /**
     * @notice Sender repays their own borrow
     * @param repayAmount The amount to repay
     */
    function repayBorrow(uint256 repayAmount) external;

    /**
     * @notice Sender 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;

    /**
     * @notice Liquidator repays a borrow belonging to borrower
     * @param borrower_ the account with the debt being payed off
     * @param repayAmount_ the amount of underlying tokens being returned
     */
    function autoLiquidationRepayBorrow(address borrower_, uint256 repayAmount_) external;

    /**
     * @notice A public function to sweep accidental ERC-20 transfers to this contract.
     *         Tokens are sent to admin (timelock)
     * @param token The address of the ERC-20 token to sweep
     * @dev RESTRICTION: Admin only.
     */
    function sweepToken(IERC20 token, address admin_) external;

    /**
     * @notice Burns collateral tokens at the borrower's address, transfer underlying assets
     to the Liquidator address.
     * @dev Called only during an auto liquidation process, msg.sender must be the Liquidation contract.
     * @param borrower_ The account having collateral seized
     * @param seizeUnderlyingAmount_ The number of underlying assets to seize. The caller must ensure
     that the parameter is greater than zero.
     * @param isLoanInsignificant_ Marker for insignificant loan whose collateral must be credited to the
     protocolInterest
     * @param receiver_ Address that receives accounts collateral
     */
    function autoLiquidationSeize(
        address borrower_,
        uint256 seizeUnderlyingAmount_,
        bool isLoanInsignificant_,
        address receiver_
    ) external;

    /**
     * @notice The amount of currency available to be lent.
     * @param token The loan currency.
     * @return The amount of `token` that can be borrowed.
     */
    function maxFlashLoan(address token) external view returns (uint256);

    /**
     * @notice The fee to be charged for a given loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @return The amount of `token` to be charged for the loan, on top of the returned principal.
     */
    function flashFee(address token, uint256 amount) external view returns (uint256);

    /**
     * @notice Initiate a flash loan.
     * @param receiver The receiver of the tokens in the loan, and the receiver of the callback.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     */
    function flashLoan(
        IERC3156FlashBorrower receiver,
        address token,
        uint256 amount,
        bytes calldata data
    ) external returns (bool);

    /**
     * @notice accrues interest and sets a new protocol interest factor for the protocol
     * @dev Admin function to accrue interest and set a new protocol interest factor
     * @dev RESTRICTION: Timelock only.
     */
    function setProtocolInterestFactor(uint256 newProtocolInterestFactorMantissa) external;

    /**
     * @notice Accrues interest and increase protocol interest by transferring from msg.sender
     * @param addAmount_ Amount of addition to protocol interest
     */
    function addProtocolInterest(uint256 addAmount_) external;

    /**
     * @notice Can only be called by liquidation contract. Increase protocol interest by transferring from payer.
     * @dev Calling code should make sure that accrueInterest() was called before.
     * @param payer_ The address from which the protocol interest will be transferred
     * @param addAmount_ Amount of addition to protocol interest
     */
    function addProtocolInterestBehalf(address payer_, uint256 addAmount_) external;

    /**
     * @notice Accrues interest and reduces protocol interest by transferring to admin
     * @param reduceAmount Amount of reduction to protocol interest
     * @dev RESTRICTION: Admin only.
     */
    function reduceProtocolInterest(uint256 reduceAmount, address admin_) external;

    /**
     * @notice accrues interest and updates the interest rate model using setInterestRateModelFresh
     * @dev Admin function to accrue interest and update the interest rate model
     * @param newInterestRateModel the new interest rate model to use
     * @dev RESTRICTION: Timelock only.
     */
    function setInterestRateModel(IInterestRateModel newInterestRateModel) external;

    /**
     * @notice Updates share of markets cash that can be used as maximum amount of flash loan.
     * @param newMax New max amount share
     * @dev RESTRICTION: Timelock only.
     */
    function setFlashLoanMaxShare(uint256 newMax) external;

    /**
     * @notice Updates fee of flash loan.
     * @param newFee New fee share of flash loan
     * @dev RESTRICTION: Timelock only.
     */
    function setFlashLoanFeeShare(uint256 newFee) external;
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC3156FlashBorrower.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC3156 FlashBorrower, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 *
 * _Available since v4.1._
 */
interface IERC3156FlashBorrower {
    /**
     * @dev Receive a flash loan.
     * @param initiator The initiator of the loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param fee The additional amount of tokens to repay.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     * @return The keccak256 hash of "ERC3156FlashBorrower.onFlashLoan"
     */
    function onFlashLoan(
        address initiator,
        address token,
        uint256 amount,
        uint256 fee,
        bytes calldata data
    ) external returns (bytes32);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC3156FlashLender.sol)

pragma solidity ^0.8.0;

import "./IERC3156FlashBorrower.sol";

/**
 * @dev Interface of the ERC3156 FlashLender, as defined in
 * https://eips.ethereum.org/EIPS/eip-3156[ERC-3156].
 *
 * _Available since v4.1._
 */
interface IERC3156FlashLender {
    /**
     * @dev The amount of currency available to be lended.
     * @param token The loan currency.
     * @return The amount of `token` that can be borrowed.
     */
    function maxFlashLoan(address token) external view returns (uint256);

    /**
     * @dev The fee to be charged for a given loan.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @return The amount of `token` to be charged for the loan, on top of the returned principal.
     */
    function flashFee(address token, uint256 amount) external view returns (uint256);

    /**
     * @dev Initiate a flash loan.
     * @param receiver The receiver of the tokens in the loan, and the receiver of the callback.
     * @param token The loan currency.
     * @param amount The amount of tokens lent.
     * @param data Arbitrary data structure, intended to contain user-defined parameters.
     */
    function flashLoan(
        IERC3156FlashBorrower receiver,
        address token,
        uint256 amount,
        bytes calldata data
    ) external returns (bool);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
          

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

import "@openzeppelin/contracts/access/IAccessControl.sol";
import "./ILinkageLeaf.sol";

interface IBuyback is IAccessControl, ILinkageLeaf {
    event Stake(address who, uint256 amount);
    event Unstake(address who, uint256 amount);
    event NewBuyback(uint256 amount, uint256 share);
    event ParticipateBuyback(address who);
    event LeaveBuyback(address who, uint256 currentStaked);
    event BuybackWeightChanged(address who, uint256 newWeight, uint256 oldWeight, uint256 newTotalWeight);
    event LoyaltyParametersChanged(uint256 newCoreFactor, uint32 newCoreResetPenalty);
    event LoyaltyStrataChanged();
    event LoyaltyGroupsChanged(uint256 newGroupCount);

    /**
     * @notice Gets info about account membership in Buyback
     */
    function getMemberInfo(address account)
        external
        view
        returns (
            bool participating,
            uint256 weight,
            uint256 lastIndex,
            uint256 stakeAmount
        );

    /**
     * @notice Gets info about accounts loyalty calculation
     */
    function getLoyaltyInfo(address account)
        external
        view
        returns (
            uint32 loyaltyStart,
            uint256 coreBalance,
            uint256 lastBalance
        );

    /**
     * @notice Gets if an account is participating in Buyback
     */
    function isParticipating(address account) external view returns (bool);

    /**
     * @notice Gets stake of the account
     */
    function getStakedAmount(address account) external view returns (uint256);

    /**
     * @notice Gets buyback weight of an account
     */
    function getWeight(address account) external view returns (uint256);

    /**
     * @notice Gets loyalty factor of an account with given balance.
     */
    function getLoyaltyFactorForBalance(address account, uint256 balance) external view returns (uint256);

    /**
     * @notice Gets total Buyback weight, which is the sum of weights of all accounts.
     */
    function getTotalWeight() external view returns (uint256);

    /**
     * @notice Gets current Buyback index.
     * Its the accumulated sum of MNTs shares that are given for each weight of an account.
     */
    function getBuybackIndex() external view returns (uint256);

    /**
     * @notice Gets all global loyalty parameters.
     */
    function getLoyaltyParameters()
        external
        view
        returns (
            uint256[24] memory loyaltyStrata,
            uint256[] memory groupThresholds,
            uint32[] memory groupStartStrata,
            uint256 coreFactor,
            uint32 coreResetPenalty
        );

    /**
     * @notice Stakes the specified amount of MNT and transfers them to this contract.
     * @notice This contract should be approved to transfer MNT from sender account
     * @param amount The amount of MNT to stake
     */
    function stake(uint256 amount) external;

    /**
     * @notice Unstakes the specified amount of MNT and transfers them back to sender if he participates
     *         in the Buyback system, otherwise just transfers MNT tokens to the sender.
     *         would not be greater than staked amount left. If `amount == MaxUint256` unstakes all staked tokens.
     * @param amount The amount of MNT to unstake
     */
    function unstake(uint256 amount) external;

    /**
     * @notice Claims buyback rewards, updates buyback weight and voting power.
     * Does nothing if account is not participating. Reverts if operation is paused.
     * @param account Address to update weights for
     */
    function updateBuybackAndVotingWeights(address account) external;

    /**
     * @notice Claims buyback rewards, updates buyback weight and voting power.
     * Does nothing if account is not participating or update is paused.
     * @param account Address to update weights for
     */
    function updateBuybackAndVotingWeightsRelaxed(address account) external;

    /**
     * @notice Does a buyback using the specified amount of MNT from sender's account
     * @param amount The amount of MNT to take and distribute as buyback
     * @dev RESTRICTION: Distributor only
     */
    function buyback(uint256 amount) external;

    /**
     * @notice Make account participating in the buyback.
     */
    function participate() external;

    /**
     * @notice Make accounts participate in buyback before its start.
     * @param accounts Address to make participate in buyback.
     * @dev RESTRICTION: Admin only
     */
    function participateOnBehalf(address[] memory accounts) external;

    /**
     * @notice Leave buyback participation, claim any MNTs rewarded by the buyback.
     * Leaving does not withdraw staked MNTs but reduces weight of the account to zero
     */
    function leave() external;

    /**
     * @notice Leave buyback participation on behalf, claim any MNTs rewarded by the buyback and
     * reduce the weight of account to zero. All staked MNTs remain on the buyback contract and available
     * for their owner to be claimed
     * Can only be called if (timestamp > participantLastVoteTimestamp + maxNonVotingPeriod).
     * @param participant Address to leave for
     * @dev RESTRICTION: GATEKEEPER only
     */
    function leaveOnBehalf(address participant) external;

    /**
     * @notice Leave buyback participation on behalf, claim any MNTs rewarded by the buyback and
     * reduce the weight of account to zero. All staked MNTs remain on the buyback contract and available
     * for their owner to be claimed.
     * @dev Function to leave sanctioned accounts from Buyback system
     * Can only be called if the participant is sanctioned by the AML system.
     * @param participant Address to leave for
     */
    function leaveByAmlDecision(address participant) external;

    /**
     * @notice Changes loyalty core factor and core reset penalty parameters.
     * @dev RESTRICTION: Admin only
     */
    function setLoyaltyParameters(uint256 newCoreFactor, uint32 newCoreResetPenalty) external;

    /**
     * @notice Sets new loyalty factors for all strata.
     * @dev RESTRICTION: Admin only
     */
    function setLoyaltyStrata(uint256[24] memory newLoyaltyStrata) external;

    /**
     * @notice Sets new groups and their parameters
     * @param newGroupThresholds New list of groups and their balance thresholds.
     * @param newGroupStartStrata Indexes of starting stratum of each group. First index MUST be zero.
     *        Length of array must be equal to the newGroupThresholds
     * @dev RESTRICTION: Admin only
     */
    function setLoyaltyGroups(uint256[] memory newGroupThresholds, uint32[] memory newGroupStartStrata) external;
}
          

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

import "@openzeppelin/contracts/utils/introspection/IERC165.sol";

/**
 * @title Minterest InterestRateModel Interface
 * @author Minterest
 */
interface IInterestRateModel {
    /**
     * @notice Calculates the current borrow interest rate per block
     * @param cash The total amount of cash the market has
     * @param borrows The total amount of borrows the market has outstanding
     * @param protocolInterest The total amount of protocol interest the market has
     * @return The borrow rate per block (as a percentage, and scaled by 1e18)
     */
    function getBorrowRate(
        uint256 cash,
        uint256 borrows,
        uint256 protocolInterest
    ) external view returns (uint256);

    /**
     * @notice Calculates the current supply interest rate per block
     * @param cash The total amount of cash the market has
     * @param borrows The total amount of borrows the market has outstanding
     * @param protocolInterest The total amount of protocol interest the market has
     * @param protocolInterestFactorMantissa The current protocol interest factor the market has
     * @return The supply rate per block (as a percentage, and scaled by 1e18)
     */
    function getSupplyRate(
        uint256 cash,
        uint256 borrows,
        uint256 protocolInterest,
        uint256 protocolInterestFactorMantissa
    ) external view returns (uint256);
}
          

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

import "./ILinkageRoot.sol";

interface ILinkageLeaf {
    /**
     * @notice Emitted when root contract address is changed
     */
    event LinkageRootSwitched(ILinkageRoot newRoot, ILinkageRoot oldRoot);

    /**
     * @notice Connects new root contract address
     * @param newRoot New root contract address
     */
    function switchLinkageRoot(ILinkageRoot newRoot) external;
}
          

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

interface ILinkageRoot {
    /**
     * @notice Emitted when new root contract connected to all leafs
     */
    event LinkageRootSwitch(ILinkageRoot newRoot);

    /**
     * @notice Emitted when root interconnects its contracts
     */
    event LinkageRootInterconnected();

    /**
     * @notice Connects new root to all leafs contracts
     * @param newRoot New root contract address
     */
    function switchLinkageRoot(ILinkageRoot newRoot) external;

    /**
     * @notice Update root for all leaf contracts
     * @dev Should include only leaf contracts
     */
    function interconnect() external;
}
          

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

import "./IMToken.sol";
import "./ILinkageLeaf.sol";

interface IRewardsHubLight is ILinkageLeaf {
    event DistributedSupplierMnt(IMToken mToken, address supplier, uint256 mntDelta, uint256 mntSupplyIndex);
    event DistributedBorrowerMnt(IMToken mToken, address borrower, uint256 mntDelta, uint256 mntBorrowIndex);
    event EmissionRewardAccrued(address account, uint256 amount);
    event RepresentativeRewardAccrued(address account, address provider, uint256 amount);
    event BuybackRewardAccrued(address account, uint256 amount);

    event Withdraw(address account, uint256 amount);
    event MntGranted(address recipient, uint256 amount);

    event MntSupplyEmissionRateUpdated(IMToken mToken, uint256 newSupplyEmissionRate);
    event MntBorrowEmissionRateUpdated(IMToken mToken, uint256 newBorrowEmissionRate);

    /**
     * @notice get keccak-256 hash of gatekeeper
     */
    function GATEKEEPER() external view returns (bytes32);

    /**
     * @notice get keccak-256 hash of timelock
     */
    function TIMELOCK() external view returns (bytes32);

    /**
     * @notice Gets the rate at which MNT is distributed to the corresponding supply market (per block)
     */
    function mntSupplyEmissionRate(IMToken) external view returns (uint256);

    /**
     * @notice Gets the rate at which MNT is distributed to the corresponding borrow market (per block)
     */
    function mntBorrowEmissionRate(IMToken) external view returns (uint256);

    /**
     * @notice Gets the MNT market supply state for each market
     */
    function mntSupplyState(IMToken) external view returns (uint224 index, uint32 blockN);

    /**
     * @notice Gets the MNT market borrow state for each market
     */
    function mntBorrowState(IMToken) external view returns (uint224 index, uint32 blockN);

    /**
     * @notice Gets the MNT supply index and block number for each market
     */
    function mntSupplierState(IMToken, address) external view returns (uint224 index, uint32 blockN);

    /**
     * @notice Gets the MNT borrow index and block number for each market
     */
    function mntBorrowerState(IMToken, address) external view returns (uint224 index, uint32 blockN);

    /**
     * @notice Gets amount of available balance of an account.
     */
    function totalBalanceOf(address account) external view returns (uint256);

    /**
     * @notice Gets amount of MNT that can be withdrawn from an account at this block.
     */
    function availableBalanceOf(address account) external view returns (uint256);

    /**
     * @notice Initializes market in RewardsHub. Should be called once from Supervisor.supportMarket
     * @dev RESTRICTION: Supervisor only
     */
    function initMarket(IMToken mToken) external;

    /**
     * @notice Accrues MNT to the market by updating the borrow and supply indexes
     * @dev This method doesn't update MNT index history in Minterest NFT.
     * @param market The market whose supply and borrow index to update
     * @return (MNT supply index, MNT borrow index)
     */
    function updateAndGetMntIndexes(IMToken market) external returns (uint224, uint224);

    /**
     * @notice Shorthand function to distribute MNT emissions from supplies of one market.
     */
    function distributeSupplierMnt(IMToken mToken, address account) external;

    /**
     * @notice Shorthand function to distribute MNT emissions from borrows of one market.
     */
    function distributeBorrowerMnt(IMToken mToken, address account) external;

    /**
     * @notice Updates market indexes and distributes tokens (if any) for holder
     * @dev Updates indexes and distributes only for those markets where the holder have a
     * non-zero supply or borrow balance.
     * @param account The address to distribute MNT for
     */
    function distributeAllMnt(address account) external;

    /**
     * @notice Distribute all MNT accrued by the accounts
     * @param accounts The addresses to distribute MNT for
     * @param mTokens The list of markets to distribute MNT in
     * @param borrowers Whether or not to distribute MNT earned by borrowing
     * @param suppliers Whether or not to distribute MNT earned by supplying
     */
    function distributeMnt(
        address[] memory accounts,
        IMToken[] memory mTokens,
        bool borrowers,
        bool suppliers
    ) external;

    /**
     * @notice Accrues buyback reward
     * @dev RESTRICTION: Buyback only
     */
    function accrueBuybackReward(address account, uint256 amount) external;

    /**
     * @notice Transfers available part of MNT rewards to the sender.
     * This will decrease accounts buyback and voting weights.
     */
    function withdraw(uint256 amount) external;

    /**
     * @notice Transfers
     * @dev RESTRICTION: Admin only
     */
    function grant(address recipient, uint256 amount) external;

    /**
     * @notice Set MNT borrow and supply emission rates for a single market
     * @param mToken The market whose MNT emission rate to update
     * @param newMntSupplyEmissionRate New supply MNT emission rate for market
     * @param newMntBorrowEmissionRate New borrow MNT emission rate for market
     * @dev RESTRICTION Timelock only
     */
    function setMntEmissionRates(
        IMToken mToken,
        uint256 newMntSupplyEmissionRate,
        uint256 newMntBorrowEmissionRate
    ) external;
}
          

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

import "@openzeppelin/contracts/access/IAccessControl.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./IBuyback.sol";

/**
 * @title Vesting contract provides unlocking of tokens on a schedule. It uses the *graded vesting* way,
 * which unlocks a specific amount of balance every period of time, until all balance unlocked.
 *
 * Vesting Schedule.
 *
 * The schedule of a vesting is described by data structure `VestingSchedule`: starting from the start timestamp
 * throughout the duration, the entire amount of totalAmount tokens will be unlocked.
 */
interface IVesting is IAccessControl {
    /**
     * @notice An event that's emitted when a new vesting schedule for a account is created.
     */
    event VestingScheduleAdded(address target, VestingSchedule schedule);

    /**
     * @notice An event that's emitted when a vesting schedule revoked.
     */
    event VestingScheduleRevoked(address target, uint256 unreleased, uint256 locked);

    /**
     * @notice An event that's emitted when the account Withdrawn the released tokens.
     */
    event Withdrawn(address target, uint256 withdrawn);

    /**
     * @notice Emitted when an account is added to the delay list
     */
    event AddedToDelayList(address account);

    /**
     * @notice Emitted when an account is removed from the delay list
     */
    event RemovedFromDelayList(address account);

    /**
     * @notice The structure is used in the contract constructor for create vesting schedules
     * during contract deploying.
     * @param totalAmount the number of tokens to be vested during the vesting duration.
     * @param target the address that will receive tokens according to schedule parameters.
     * @param start offset in minutes at which vesting starts. Zero will vesting immediately.
     * @param duration duration in minutes of the period in which the tokens will vest.
     * @param revocable whether the vesting is revocable or not.
     */
    struct ScheduleData {
        uint256 totalAmount;
        address target;
        uint32 start;
        uint32 duration;
        bool revocable;
    }

    /**
     * @notice Vesting schedules of an account.
     * @param totalAmount the number of tokens to be vested during the vesting duration.
     * @param released the amount of the token released. It means that the account has called withdraw() and received
     * @param start the timestamp in minutes at which vesting starts. Must not be equal to zero, as it is used to
     * check for the existence of a vesting schedule.
     * @param duration duration in minutes of the period in which the tokens will vest.
     * `released amount` of tokens to his address.
     * @param revocable whether the vesting is revocable or not.
     */
    struct VestingSchedule {
        uint256 totalAmount;
        uint256 released;
        uint32 created;
        uint32 start;
        uint32 duration;
        bool revocable;
    }

    /// @notice get keccak-256 hash of GATEKEEPER role
    function GATEKEEPER() external view returns (bytes32);

    /// @notice get keccak-256 hash of TOKEN_PROVIDER role
    function TOKEN_PROVIDER() external view returns (bytes32);

    /**
     * @notice get vesting schedule of an account.
     */
    function schedules(address)
        external
        view
        returns (
            uint256 totalAmount,
            uint256 released,
            uint32 created,
            uint32 start,
            uint32 duration,
            bool revocable
        );

    /**
     * @notice Gets the amount of MNT that was transferred to Vesting contract
     * and can be transferred to other accounts via vesting process.
     * Transferring rewards from Vesting via withdraw method will decrease this amount.
     */
    function allocation() external view returns (uint256);

    /**
     * @notice Gets the amount of allocated MNT tokens that are not used in any vesting schedule yet.
     * Creation of new vesting schedules will decrease this amount.
     */
    function freeAllocation() external view returns (uint256);

    /**
     * @notice get Whether or not the account is in the delay list
     */
    function delayList(address) external view returns (bool);

    /**
     * @notice Withdraw the specified number of tokens. For a successful transaction, the requirement
     * `amount_ > 0 && amount_ <= unreleased` must be met.
     * If `amount_ == MaxUint256` withdraw all unreleased tokens.
     * @param amount_ The number of tokens to withdraw.
     */
    function withdraw(uint256 amount_) external;

    /**
     * @notice Increases vesting schedule allocation and transfers MNT into Vesting.
     * @dev RESTRICTION: TOKEN_PROVIDER only
     */
    function refill(uint256 amount) external;

    /**
     * @notice Transfers MNT that were added to the contract without calling the refill and are unallocated.
     * @dev RESTRICTION: Admin only
     */
    function sweep(address recipient, uint256 amount) external;

    /**
     * @notice Allows the admin to create a new vesting schedules.
     * @param schedulesData an array of vesting schedules that will be created.
     * @dev RESTRICTION: Admin only.
     */
    function createVestingScheduleBatch(ScheduleData[] memory schedulesData) external;

    /**
     * @notice Allows the admin to revoke the vesting schedule. Tokens already vested
     * transfer to the account, the rest are returned to the vesting contract.
     * Accounts that are in delay list have their withdraw blocked so they would not receive anything.
     * @param target_ the address from which the vesting schedule is revoked.
     * @dev RESTRICTION: Gatekeeper only.
     */
    function revokeVestingSchedule(address target_) external;

    /**
     * @notice Calculates the end of the vesting.
     * @param who_ account address for which the parameter is returned.
     * @return the end of the vesting.
     */
    function endOfVesting(address who_) external view returns (uint256);

    /**
     * @notice Calculates locked amount for a given `time`.
     * @param who_ account address for which the parameter is returned.
     * @return locked amount for a given `time`.
     */
    function lockedAmount(address who_) external view returns (uint256);

    /**
     * @notice Calculates the amount that has already vested.
     * @param who_ account address for which the parameter is returned.
     * @return the amount that has already vested.
     */
    function vestedAmount(address who_) external view returns (uint256);

    /**
     * @notice Calculates the amount that has already vested but hasn't been released yet.
     * @param who_ account address for which the parameter is returned.
     * @return the amount that has already vested but hasn't been released yet.
     */
    function releasableAmount(address who_) external view returns (uint256);

    /**
     * @notice Gets the amount that has already vested but hasn't been released yet if account
     *      schedule had no starting delay (cliff).
     */
    function getReleasableWithoutCliff(address account) external view returns (uint256);

    /**
     * @notice Add an account with revocable schedule to the delay list
     * @param who_ The account that is being added to the delay list
     * @dev RESTRICTION: Gatekeeper only.
     */
    function addToDelayList(address who_) external;

    /**
     * @notice Remove an account from the delay list
     * @param who_ The account that is being removed from the delay list
     * @dev RESTRICTION: Gatekeeper only.
     */
    function removeFromDelayList(address who_) external;
}
          

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.17;

interface IWeightAggregator {
    /**
     * @notice Returns MNTs of the account that are used in buyback weight calculation.
     */
    function getAccountFunds(address account) external view returns (uint256);

    /**
     * @notice Returns loyalty factor of the specified account.
     */
    function getLoyaltyFactor(address account) external view returns (uint256);

    /**
     * @notice Returns Buyback weight for the user
     */
    function getBuybackWeight(address account) external view returns (uint256);

    /**
     * @notice Return voting weight for the user
     */
    function getVotingWeight(address account) external view returns (uint256);
}