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// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

import "../StrategyCommon.sol";

contract Arbitrary is StrategyCommon {

    /**
     @notice a strategy is dedicated to exactly one oneToken instance
     @param oneTokenFactory_ bind this instance to oneTokenFactory instance
     @param oneToken_ bind this instance to one oneToken vault
     @param description_ metadata has no impact on logic
     */

    constructor(address oneTokenFactory_, address oneToken_, string memory description_) 
        StrategyCommon(oneTokenFactory_, oneToken_, description_)
    {}


    /**
    @notice Governance can work with collateral and treasury assets. Can swap assets.
    @param target address/smart contract you are interacting with
    @param value msg.value (amount of eth in WEI you are sending. Most of the time it is 0)
    @param signature the function signature
    @param data abi-encodeded bytecode of the parameter values to send
    */
    function executeTransaction(address target, uint256 value, string memory signature, bytes memory data) external onlyOwner returns (bytes memory) {
        bytes memory callData;

        if (bytes(signature).length == 0) {
            callData = data;
        } else {
            callData = abi.encodePacked(bytes4(keccak256(bytes(signature))), data);
        }

        // solium-disable-next-line security/no-call-value
        (bool success, bytes memory returnData) = target.call{ value: value }(callData);
        require(success, "OneTokenV1::executeTransaction: Transaction execution reverted.");
        return returnData;
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

import "../interface/IOneTokenFactory.sol";
import "../interface/IStrategy.sol";
import "../interface/IOneTokenV1Base.sol";
import "../_openzeppelin/token/ERC20/IERC20.sol";
import "../_openzeppelin/token/ERC20/SafeERC20.sol";
import "../common/ICHIModuleCommon.sol";

abstract contract StrategyCommon is IStrategy, ICHIModuleCommon {

    using SafeERC20 for IERC20;

    address public override oneToken;
    bytes32 constant public override MODULE_TYPE = keccak256(abi.encodePacked("ICHI V1 Strategy Implementation"));

    event StrategyDeployed(address sender, address oneTokenFactory, address oneToken_, string description);
    event StrategyInitialized(address sender);
    event StrategyExecuted(address indexed sender, address indexed token);
    event VaultAllowance(address indexed sender, address indexed token, uint256 amount);
    event FromVault(address indexed sender, address indexed token, uint256 amount);
    event ToVault(address indexed sender, address indexed token, uint256 amount);

    modifier onlyToken {
        require(msg.sender == oneToken, "StrategyCommon: initialize from oneToken instance");
        _;
    }
    
    /**
     @dev oneToken governance has privileges that may be delegated to a controller
     */
    modifier strategyOwnerTokenOrController {
        if(msg.sender != oneToken) {
            if(msg.sender != IOneTokenV1Base(oneToken).controller()) {
                require(msg.sender == IOneTokenV1Base(oneToken).owner(), "StrategyCommon: not token controller or owner.");
            }
        }
        _;
    }

    /**
     @notice a strategy is dedicated to exactly one oneToken instance
     @param oneTokenFactory_ bind this instance to oneTokenFactory instance
     @param oneToken_ bind this instance to one oneToken vault
     @param description_ metadata has no impact on logic
     */
    constructor(address oneTokenFactory_, address oneToken_, string memory description_)
        ICHIModuleCommon(oneTokenFactory_, ModuleType.Strategy, description_)
    {
        require(oneToken_ != NULL_ADDRESS, "StrategyCommon: oneToken cannot be NULL");
        require(IOneTokenFactory(IOneTokenV1Base(oneToken_).oneTokenFactory()).isOneToken(oneToken_), "StrategyCommon: oneToken is unknown");
        oneToken = oneToken_;
        emit StrategyDeployed(msg.sender, oneTokenFactory_, oneToken_, description_);
    }

    /**
     @notice a strategy is dedicated to exactly one oneToken instance and must be re-initializable
     */
    function init() external onlyToken virtual override {
        IERC20(oneToken).safeApprove(oneToken, 0);
        IERC20(oneToken).safeApprove(oneToken, INFINITE);
        emit StrategyInitialized(oneToken);
    }

    /**
     @notice a controller invokes execute() to trigger automated logic within the strategy.
     @dev called from oneToken governance or the active controller. Overriding function should emit the event. 
     */  
    function execute() external virtual strategyOwnerTokenOrController override {
        // emit StrategyExecuted(msg.sender, oneToken);
    }  
        
    /**
     @notice gives the oneToken control of tokens deposited in the strategy
     @dev called from oneToken governance or the active controller
     @param token the asset
     @param amount the allowance. 0 = infinte
     */
    function setAllowance(address token, uint256 amount) external strategyOwnerTokenOrController override {
        if(amount == 0) amount = INFINITE;
        IERC20(token).safeApprove(oneToken, 0);
        IERC20(token).safeApprove(oneToken, amount);
        emit VaultAllowance(msg.sender, token, amount);
    }

    /**
     @notice closes all positions and returns the funds to the oneToken vault
     @dev override this function to withdraw funds from external contracts. Return false if any funds are unrecovered.
     */
    function closeAllPositions() external virtual strategyOwnerTokenOrController override returns(bool success) {
        success = _closeAllPositions();
    }

    /**
     @notice closes all positions and returns the funds to the oneToken vault
     @dev override this function to withdraw funds from external contracts. Return false if any funds are unrecovered.
     */
    function _closeAllPositions() internal virtual returns(bool success) {
        uint256 assetCount;
        success = true;
        assetCount = IOneTokenV1Base(oneToken).assetCount();
        for(uint256 i=0; i < assetCount; i++) {
            address thisAsset = IOneTokenV1Base(oneToken).assetAtIndex(i);
            closePositions(thisAsset);
        }
    }

    /**
     @notice closes token positions and returns the funds to the oneToken vault
     @dev override this function to redeem and withdraw related funds from external contracts. Return false if any funds are unrecovered. 
     @param token asset to recover
     @param success true, complete success, false, 1 or more failed operations
     */
    function closePositions(address token) public strategyOwnerTokenOrController override virtual returns(bool success) {
        // this naive process returns funds on hand.
        // override this to explicitly close external positions and return false if 1 or more positions cannot be closed at this time.
        success = true;
        uint256 strategyBalance = IERC20(token).balanceOf(address(this));
        if(strategyBalance > 0) {
            _toVault(token, strategyBalance);
        }
    }

    /**
     @notice let's the oneToken controller instance send funds to the oneToken vault
     @dev implementations must close external positions and return all related assets to the vault
     @param token the ecr20 token to send
     @param amount the amount of tokens to send
     */
    function toVault(address token, uint256 amount) external strategyOwnerTokenOrController override {
        _toVault(token, amount);
    }

    /**
     @notice close external positions send all related funds to the oneToken vault
     @param token the ecr20 token to send
     @param amount the amount of tokens to send
     */
    function _toVault(address token, uint256 amount) internal {
        IERC20(token).safeTransfer(oneToken, amount);
        emit ToVault(msg.sender, token, amount);
    }

    /**
     @notice let's the oneToken controller instance draw funds from the oneToken vault allowance
     @param token the ecr20 token to send
     @param amount the amount of tokens to send
     */
    function fromVault(address token, uint256 amount) external strategyOwnerTokenOrController override {
        _fromVault(token, amount);
    }

    /**
     @notice draw funds from the oneToken vault
     @param token the ecr20 token to send
     @param amount the amount of tokens to send
     */
    function _fromVault(address token, uint256 amount) internal {
        IERC20(token).safeTransferFrom(oneToken, address(this), amount);
        emit FromVault(msg.sender, token, amount);
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;
pragma abicoder v2;

import "./InterfaceCommon.sol";

interface IOneTokenFactory is InterfaceCommon {

    function oneTokenProxyAdmins(address) external returns(address);
    function deployOneTokenProxy(
        string memory name,
        string memory symbol,
        address governance, 
        address version,
        address controller,
        address mintMaster,              
        address memberToken, 
        address collateral,
        address oneTokenOracle
    ) 
        external 
        returns(address newOneTokenProxy, address proxyAdmin);

    function admitModule(address module, ModuleType moduleType, string memory name, string memory url) external;
    function updateModule(address module, string memory name, string memory url) external;
    function removeModule(address module) external;

    function admitForeignToken(address foreignToken, bool collateral, address oracle) external;
    function updateForeignToken(address foreignToken, bool collateral) external;
    function removeForeignToken(address foreignToken) external;

    function assignOracle(address foreignToken, address oracle) external;
    function removeOracle(address foreignToken, address oracle) external; 

    /**
     * View functions
     */
    
    function MODULE_TYPE() external view returns(bytes32);

    function oneTokenCount() external view returns(uint256);
    function oneTokenAtIndex(uint256 index) external view returns(address);
    function isOneToken(address oneToken) external view returns(bool);
 
    // modules

    function moduleCount() external view returns(uint256);
    function moduleAtIndex(uint256 index) external view returns(address module);
    function isModule(address module) external view returns(bool);
    function isValidModuleType(address module, ModuleType moduleType) external view returns(bool);

    // foreign tokens

    function foreignTokenCount() external view returns(uint256);
    function foreignTokenAtIndex(uint256 index) external view returns(address);
    function foreignTokenInfo(address foreignToken) external view returns(bool collateral, uint256 oracleCount);
    function foreignTokenOracleCount(address foreignToken) external view returns(uint256);
    function foreignTokenOracleAtIndex(address foreignToken, uint256 index) external view returns(address);
    function isOracle(address foreignToken, address oracle) external view returns(bool);
    function isForeignToken(address foreignToken) external view returns(bool);
    function isCollateral(address foreignToken) external view returns(bool);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

import "./IModule.sol";

interface IStrategy is IModule {
    
    function init() external;
    function execute() external;
    function setAllowance(address token, uint256 amount) external;
    function toVault(address token, uint256 amount) external;
    function fromVault(address token, uint256 amount) external;
    function closeAllPositions() external returns(bool);
    function closePositions(address token) external returns(bool success);
    function oneToken() external view returns(address);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

import "./IICHICommon.sol";
import "./IERC20Extended.sol";

interface IOneTokenV1Base is IICHICommon, IERC20 {
    
    function init(string memory name_, string memory symbol_, address oneTokenOracle_, address controller_,  address mintMaster_, address memberToken_, address collateral_) external;
    function changeController(address controller_) external;
    function changeMintMaster(address mintMaster_, address oneTokenOracle) external;
    function addAsset(address token, address oracle) external;
    function removeAsset(address token) external;
    function setStrategy(address token, address strategy, uint256 allowance) external;
    function executeStrategy(address token) external;
    function removeStrategy(address token) external;
    function closeStrategy(address token) external;
    function increaseStrategyAllowance(address token, uint256 amount) external;
    function decreaseStrategyAllowance(address token, uint256 amount) external;
    function setFactory(address newFactory) external;

    function MODULE_TYPE() external view returns(bytes32);
    function oneTokenFactory() external view returns(address);
    function controller() external view returns(address);
    function mintMaster() external view returns(address);
    function memberToken() external view returns(address);
    function assets(address) external view returns(address, address);
    function balances(address token) external view returns(uint256 inVault, uint256 inStrategy);
    function collateralTokenCount() external view returns(uint256);
    function collateralTokenAtIndex(uint256 index) external view returns(address);
    function isCollateral(address token) external view returns(bool);
    function otherTokenCount() external view  returns(uint256);
    function otherTokenAtIndex(uint256 index) external view returns(address); 
    function isOtherToken(address token) external view returns(bool);
    function assetCount() external view returns(uint256);
    function assetAtIndex(uint256 index) external view returns(address); 
    function isAsset(address token) external view returns(bool);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

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

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // 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(IERC20 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(IERC20 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(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

import "../interface/IModule.sol";
import "../interface/IOneTokenFactory.sol";
import "../interface/IOneTokenV1Base.sol";
import "./ICHICommon.sol";

abstract contract ICHIModuleCommon is IModule, ICHICommon {
    
    ModuleType public immutable override moduleType;
    string public override moduleDescription;
    address public immutable override oneTokenFactory;

    event ModuleDeployed(address sender, ModuleType moduleType, string description);
    event DescriptionUpdated(address sender, string description);
   
    modifier onlyKnownToken {
        require(IOneTokenFactory(oneTokenFactory).isOneToken(msg.sender), "ICHIModuleCommon: msg.sender is not a known oneToken");
        _;
    }
    
    modifier onlyTokenOwner (address oneToken) {
        require(msg.sender == IOneTokenV1Base(oneToken).owner(), "ICHIModuleCommon: msg.sender is not oneToken owner");
        _;
    }

    modifier onlyModuleOrFactory {
        if(!IOneTokenFactory(oneTokenFactory).isModule(msg.sender)) {
            require(msg.sender == oneTokenFactory, "ICHIModuleCommon: msg.sender is not module owner, token factory or registed module");
        }
        _;
    }
    
    /**
     @notice modules are bound to the factory at deployment time
     @param oneTokenFactory_ factory to bind to
     @param moduleType_ type number helps prevent governance errors
     @param description_ human-readable, descriptive only
     */    
    constructor (address oneTokenFactory_, ModuleType moduleType_, string memory description_) {
        require(oneTokenFactory_ != NULL_ADDRESS, "ICHIModuleCommon: oneTokenFactory cannot be empty");
        require(bytes(description_).length > 0, "ICHIModuleCommon: description cannot be empty");
        oneTokenFactory = oneTokenFactory_;
        moduleType = moduleType_;
        moduleDescription = description_;
        emit ModuleDeployed(msg.sender, moduleType_, description_);
    }

    /**
     @notice set a module description
     @param description new module desciption
     */
    function updateDescription(string memory description) external onlyOwner override {
        require(bytes(description).length > 0, "ICHIModuleCommon: description cannot be empty");
        moduleDescription = description;
        emit DescriptionUpdated(msg.sender, description);
    }  
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;
pragma abicoder v2;

interface InterfaceCommon {

    enum ModuleType { Version, Controller, Strategy, MintMaster, Oracle }

}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

import "./IICHICommon.sol";
import "./InterfaceCommon.sol";

interface IModule is IICHICommon { 
       
    function oneTokenFactory() external view returns(address);
    function updateDescription(string memory description) external;
    function moduleDescription() external view returns(string memory);
    function MODULE_TYPE() external view returns(bytes32);
    function moduleType() external view returns(ModuleType);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

import "./IICHIOwnable.sol";
import "./InterfaceCommon.sol";

interface IICHICommon is IICHIOwnable, InterfaceCommon {}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

interface IICHIOwnable {
    
    function renounceOwnership() external;
    function transferOwnership(address newOwner) external;
    function owner() external view returns (address);
}

// SPDX-License-Identifier: BUSL-1.1

pragma solidity 0.7.6;

import "../_openzeppelin/token/ERC20/IERC20.sol";

interface IERC20Extended is IERC20 {
    
    function decimals() external view returns(uint8);
    function symbol() external view returns(string memory);
    function name() external view returns(string memory);
}

// 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 SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @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) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @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) {
        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, reverting 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) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting 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) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * 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);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * 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);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * 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 >=0.6.2 <0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // 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);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(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: BUSL-1.1

pragma solidity 0.7.6;

import "../oz_modified/ICHIOwnable.sol";
import "../oz_modified/ICHIInitializable.sol";
import "../interface/IERC20Extended.sol";
import "../interface/IICHICommon.sol";

contract ICHICommon is IICHICommon, ICHIOwnable, ICHIInitializable {

    uint256 constant PRECISION = 10 ** 18;
    uint256 constant INFINITE = uint256(0-1);
    address constant NULL_ADDRESS = address(0);
    
    // @dev internal fingerprints help prevent deployment-time governance errors

    bytes32 constant COMPONENT_CONTROLLER = keccak256(abi.encodePacked("ICHI V1 Controller"));
    bytes32 constant COMPONENT_VERSION = keccak256(abi.encodePacked("ICHI V1 OneToken Implementation"));
    bytes32 constant COMPONENT_STRATEGY = keccak256(abi.encodePacked("ICHI V1 Strategy Implementation"));
    bytes32 constant COMPONENT_MINTMASTER = keccak256(abi.encodePacked("ICHI V1 MintMaster Implementation"));
    bytes32 constant COMPONENT_ORACLE = keccak256(abi.encodePacked("ICHI V1 Oracle Implementation"));
    bytes32 constant COMPONENT_VOTERROLL = keccak256(abi.encodePacked("ICHI V1 VoterRoll Implementation"));
    bytes32 constant COMPONENT_FACTORY = keccak256(abi.encodePacked("ICHI OneToken Factory"));
}

// SPDX-License-Identifier: MIT

/**
 * @dev Constructor visibility has been removed from the original.
 * _transferOwnership() has been added to support proxied deployments.
 * Abstract tag removed from contract block.
 * Added interface inheritance and override modifiers.
 * Changed contract identifier in require error messages.
 */

pragma solidity >=0.6.0 <0.8.0;

import "../_openzeppelin/utils/Context.sol";
import "../interface/IICHIOwnable.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract ICHIOwnable is IICHIOwnable, Context {
    
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Throws if called by any account other than the owner.
     */
     
    modifier onlyOwner() {
        require(owner() == _msgSender(), "ICHIOwnable: caller is not the owner");
        _;
    }    

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     * Ineffective for proxied deployed. Use initOwnable.
     */
    constructor() {
        _transferOwnership(msg.sender);
    }

    /**
     @dev initialize proxied deployment
     */
    function initOwnable() internal {
        require(owner() == address(0), "ICHIOwnable: already initialized");
        _transferOwnership(msg.sender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual override returns (address) {
        return _owner;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual override onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */

    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _transferOwnership(newOwner);
    }

    /**
     * @dev be sure to call this in the initialization stage of proxied deployment or owner will not be set
     */

    function _transferOwnership(address newOwner) internal {
        require(newOwner != address(0), "ICHIOwnable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.7.6;

import "../_openzeppelin/utils/Address.sol";

contract ICHIInitializable {

    bool private _initialized;
    bool private _initializing;

    modifier initializer() {
        require(_initializing || _isConstructor() || !_initialized, "ICHIInitializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

    modifier initialized {
        require(_initialized, "ICHIInitializable: contract is not initialized");
        _;
    }

    function _isConstructor() private view returns (bool) {
        return !Address.isContract(address(this));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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