pragma experimental ABIEncoderV2;
// File: contracts/modules/common/Utils.sol
// Copyright (C) 2020  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
/**
 * @title Utils
 * @notice Common utility methods used by modules.
 */
library Utils {
    /**
    * @notice Helper method to recover the signer at a given position from a list of concatenated signatures.
    * @param _signedHash The signed hash
    * @param _signatures The concatenated signatures.
    * @param _index The index of the signature to recover.
    */
    function recoverSigner(bytes32 _signedHash, bytes memory _signatures, uint _index) internal pure returns (address) {
        uint8 v;
        bytes32 r;
        bytes32 s;
        // we jump 32 (0x20) as the first slot of bytes contains the length
        // we jump 65 (0x41) per signature
        // for v we load 32 bytes ending with v (the first 31 come from s) then apply a mask
        // solhint-disable-next-line no-inline-assembly
        assembly {
            r := mload(add(_signatures, add(0x20,mul(0x41,_index))))
            s := mload(add(_signatures, add(0x40,mul(0x41,_index))))
            v := and(mload(add(_signatures, add(0x41,mul(0x41,_index)))), 0xff)
        }
        require(v == 27 || v == 28);
        address recoveredAddress = ecrecover(_signedHash, v, r, s);
        require(recoveredAddress != address(0), "Utils: ecrecover returned 0");
        return recoveredAddress;
    }
    /**
    * @notice Helper method to parse data and extract the method signature.
    */
    function functionPrefix(bytes memory _data) internal pure returns (bytes4 prefix) {
        require(_data.length >= 4, "RM: Invalid functionPrefix");
        // solhint-disable-next-line no-inline-assembly
        assembly {
            prefix := mload(add(_data, 0x20))
        }
    }
    /**
    * @notice Returns ceil(a / b).
    */
    function ceil(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a / b;
        if (a % b == 0) {
            return c;
        } else {
            return c + 1;
        }
    }
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a < b) {
            return a;
        }
        return b;
    }
}
// File: @openzeppelin/contracts/math/SafeMath.sol
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }
    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return c;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}
// File: contracts/wallet/IWallet.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IWallet
 * @notice Interface for the BaseWallet
 */
interface IWallet {
    /**
     * @notice Returns the wallet owner.
     * @return The wallet owner address.
     */
    function owner() external view returns (address);
    /**
     * @notice Returns the number of authorised modules.
     * @return The number of authorised modules.
     */
    function modules() external view returns (uint);
    /**
     * @notice Sets a new owner for the wallet.
     * @param _newOwner The new owner.
     */
    function setOwner(address _newOwner) external;
    /**
     * @notice Checks if a module is authorised on the wallet.
     * @param _module The module address to check.
     * @return `true` if the module is authorised, otherwise `false`.
     */
    function authorised(address _module) external view returns (bool);
    /**
     * @notice Returns the module responsible for a static call redirection.
     * @param _sig The signature of the static call.
     * @return the module doing the redirection
     */
    function enabled(bytes4 _sig) external view returns (address);
    /**
     * @notice Enables/Disables a module.
     * @param _module The target module.
     * @param _value Set to `true` to authorise the module.
     */
    function authoriseModule(address _module, bool _value) external;
    /**
    * @notice Enables a static method by specifying the target module to which the call must be delegated.
    * @param _module The target module.
    * @param _method The static method signature.
    */
    function enableStaticCall(address _module, bytes4 _method) external;
}
// File: contracts/infrastructure/IModuleRegistry.sol
// Copyright (C) 2020  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IModuleRegistry
 * @notice Interface for the registry of authorised modules.
 */
interface IModuleRegistry {
    function registerModule(address _module, bytes32 _name) external;
    function deregisterModule(address _module) external;
    function registerUpgrader(address _upgrader, bytes32 _name) external;
    function deregisterUpgrader(address _upgrader) external;
    function recoverToken(address _token) external;
    function moduleInfo(address _module) external view returns (bytes32);
    function upgraderInfo(address _upgrader) external view returns (bytes32);
    function isRegisteredModule(address _module) external view returns (bool);
    function isRegisteredModule(address[] calldata _modules) external view returns (bool);
    function isRegisteredUpgrader(address _upgrader) external view returns (bool);
}
// File: contracts/infrastructure/storage/ILockStorage.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
pragma solidity >=0.5.4 <0.7.0;
interface ILockStorage {
    function isLocked(address _wallet) external view returns (bool);
    function getLock(address _wallet) external view returns (uint256);
    function getLocker(address _wallet) external view returns (address);
    function setLock(address _wallet, address _locker, uint256 _releaseAfter) external;
}
// File: contracts/modules/common/IFeature.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IFeature
 * @notice Interface for a Feature.
 * @author Julien Niset - <julien@argent.xyz>, Olivier VDB - <olivier@argent.xyz>
 */
interface IFeature {
    enum OwnerSignature {
        Anyone,             // Anyone
        Required,           // Owner required
        Optional,           // Owner and/or guardians
        Disallowed          // guardians only
    }
    /**
    * @notice Utility method to recover any ERC20 token that was sent to the Feature by mistake.
    * @param _token The token to recover.
    */
    function recoverToken(address _token) external;
    /**
     * @notice Inits a Feature for a wallet by e.g. setting some wallet specific parameters in storage.
     * @param _wallet The wallet.
     */
    function init(address _wallet) external;
    /**
     * @notice Helper method to check if an address is an authorised feature of a target wallet.
     * @param _wallet The target wallet.
     * @param _feature The address.
     */
    function isFeatureAuthorisedInVersionManager(address _wallet, address _feature) external view returns (bool);
    /**
    * @notice Gets the number of valid signatures that must be provided to execute a
    * specific relayed transaction.
    * @param _wallet The target wallet.
    * @param _data The data of the relayed transaction.
    * @return The number of required signatures and the wallet owner signature requirement.
    */
    function getRequiredSignatures(address _wallet, bytes calldata _data) external view returns (uint256, OwnerSignature);
    /**
    * @notice Gets the list of static call signatures that this feature responds to on behalf of wallets
    */
    function getStaticCallSignatures() external view returns (bytes4[] memory);
}
// File: lib/other/ERC20.sol
pragma solidity >=0.5.4 <0.7.0;
/**
 * ERC20 contract interface.
 */
interface ERC20 {
    function totalSupply() external view returns (uint);
    function decimals() external view returns (uint);
    function balanceOf(address tokenOwner) external view returns (uint balance);
    function allowance(address tokenOwner, address spender) external view returns (uint remaining);
    function transfer(address to, uint tokens) external returns (bool success);
    function approve(address spender, uint tokens) external returns (bool success);
    function transferFrom(address from, address to, uint tokens) external returns (bool success);
}
// File: contracts/infrastructure/storage/ILimitStorage.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
/**
 * @title ILimitStorage
 * @notice LimitStorage interface
 */
interface ILimitStorage {
    struct Limit {
        // the current limit
        uint128 current;
        // the pending limit if any
        uint128 pending;
        // when the pending limit becomes the current limit
        uint64 changeAfter;
    }
    struct DailySpent {
        // The amount already spent during the current period
        uint128 alreadySpent;
        // The end of the current period
        uint64 periodEnd;
    }
    function setLimit(address _wallet, Limit memory _limit) external;
    function getLimit(address _wallet) external view returns (Limit memory _limit);
    function setDailySpent(address _wallet, DailySpent memory _dailySpent) external;
    function getDailySpent(address _wallet) external view returns (DailySpent memory _dailySpent);
    function setLimitAndDailySpent(address _wallet, Limit memory _limit, DailySpent memory _dailySpent) external;
    function getLimitAndDailySpent(address _wallet) external view returns (Limit memory _limit, DailySpent memory _dailySpent);
}
// File: contracts/modules/common/IVersionManager.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IVersionManager
 * @notice Interface for the VersionManager module.
 * @author Olivier VDB - <olivier@argent.xyz>
 */
interface IVersionManager {
    /**
     * @notice Returns true if the feature is authorised for the wallet
     * @param _wallet The target wallet.
     * @param _feature The feature.
     */
    function isFeatureAuthorised(address _wallet, address _feature) external view returns (bool);
    /**
     * @notice Lets a feature (caller) invoke a wallet.
     * @param _wallet The target wallet.
     * @param _to The target address for the transaction.
     * @param _value The value of the transaction.
     * @param _data The data of the transaction.
     */
    function checkAuthorisedFeatureAndInvokeWallet(
        address _wallet,
        address _to,
        uint256 _value,
        bytes calldata _data
    ) external returns (bytes memory _res);
    /* ******* Backward Compatibility with old Storages and BaseWallet *************** */
    /**
     * @notice Sets a new owner for the wallet.
     * @param _newOwner The new owner.
     */
    function setOwner(address _wallet, address _newOwner) external;
    /**
     * @notice Lets a feature write data to a storage contract.
     * @param _wallet The target wallet.
     * @param _storage The storage contract.
     * @param _data The data of the call
     */
    function invokeStorage(address _wallet, address _storage, bytes calldata _data) external;
    /**
     * @notice Upgrade a wallet to a new version.
     * @param _wallet the wallet to upgrade
     * @param _toVersion the new version
     */
    function upgradeWallet(address _wallet, uint256 _toVersion) external;
}
// File: contracts/modules/common/BaseFeature.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.s
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
/**
 * @title BaseFeature
 * @notice Base Feature contract that contains methods common to all Feature contracts.
 * @author Julien Niset - <julien@argent.xyz>, Olivier VDB - <olivier@argent.xyz>
 */
contract BaseFeature is IFeature {
    // Empty calldata
    bytes constant internal EMPTY_BYTES = "";
    // Mock token address for ETH
    address constant internal ETH_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    // The address of the Lock storage
    ILockStorage internal lockStorage;
    // The address of the Version Manager
    IVersionManager internal versionManager;
    event FeatureCreated(bytes32 name);
    /**
     * @notice Throws if the wallet is locked.
     */
    modifier onlyWhenUnlocked(address _wallet) {
        require(!lockStorage.isLocked(_wallet), "BF: wallet locked");
        _;
    }
    /**
     * @notice Throws if the sender is not the VersionManager.
     */
    modifier onlyVersionManager() {
        require(msg.sender == address(versionManager), "BF: caller must be VersionManager");
        _;
    }
    /**
     * @notice Throws if the sender is not the owner of the target wallet.
     */
    modifier onlyWalletOwner(address _wallet) {
        require(isOwner(_wallet, msg.sender), "BF: must be wallet owner");
        _;
    }
    /**
     * @notice Throws if the sender is not an authorised feature of the target wallet.
     */
    modifier onlyWalletFeature(address _wallet) {
        require(versionManager.isFeatureAuthorised(_wallet, msg.sender), "BF: must be a wallet feature");
        _;
    }
    /**
     * @notice Throws if the sender is not the owner of the target wallet or the feature itself.
     */
    modifier onlyWalletOwnerOrFeature(address _wallet) {
        // Wrapping in an internal method reduces deployment cost by avoiding duplication of inlined code
        verifyOwnerOrAuthorisedFeature(_wallet, msg.sender);
        _;
    }
    constructor(
        ILockStorage _lockStorage,
        IVersionManager _versionManager,
        bytes32 _name
    ) public {
        lockStorage = _lockStorage;
        versionManager = _versionManager;
        emit FeatureCreated(_name);
    }
    /**
    * @inheritdoc IFeature
    */
    function recoverToken(address _token) external virtual override {
        uint total = ERC20(_token).balanceOf(address(this));
        _token.call(abi.encodeWithSelector(ERC20(_token).transfer.selector, address(versionManager), total));
    }
    /**
     * @notice Inits the feature for a wallet by doing nothing.
     * @dev !! Overriding methods need make sure `init()` can only be called by the VersionManager !!
     * @param _wallet The wallet.
     */
    function init(address _wallet) external virtual override  {}
    /**
     * @inheritdoc IFeature
     */
    function getRequiredSignatures(address, bytes calldata) external virtual view override returns (uint256, OwnerSignature) {
        revert("BF: disabled method");
    }
    /**
     * @inheritdoc IFeature
     */
    function getStaticCallSignatures() external virtual override view returns (bytes4[] memory _sigs) {}
    /**
     * @inheritdoc IFeature
     */
    function isFeatureAuthorisedInVersionManager(address _wallet, address _feature) public override view returns (bool) {
        return versionManager.isFeatureAuthorised(_wallet, _feature);
    }
    /**
    * @notice Checks that the wallet address provided as the first parameter of _data matches _wallet
    * @return false if the addresses are different.
    */
    function verifyData(address _wallet, bytes calldata _data) internal pure returns (bool) {
        require(_data.length >= 36, "RM: Invalid dataWallet");
        address dataWallet = abi.decode(_data[4:], (address));
        return dataWallet == _wallet;
    }
     /**
     * @notice Helper method to check if an address is the owner of a target wallet.
     * @param _wallet The target wallet.
     * @param _addr The address.
     */
    function isOwner(address _wallet, address _addr) internal view returns (bool) {
        return IWallet(_wallet).owner() == _addr;
    }
    /**
     * @notice Verify that the caller is an authorised feature or the wallet owner.
     * @param _wallet The target wallet.
     * @param _sender The caller.
     */
    function verifyOwnerOrAuthorisedFeature(address _wallet, address _sender) internal view {
        require(isFeatureAuthorisedInVersionManager(_wallet, _sender) || isOwner(_wallet, _sender), "BF: must be owner or feature");
    }
    /**
     * @notice Helper method to invoke a wallet.
     * @param _wallet The target wallet.
     * @param _to The target address for the transaction.
     * @param _value The value of the transaction.
     * @param _data The data of the transaction.
     */
    function invokeWallet(address _wallet, address _to, uint256 _value, bytes memory _data)
        internal
        returns (bytes memory _res) 
    {
        _res = versionManager.checkAuthorisedFeatureAndInvokeWallet(_wallet, _to, _value, _data);
    }
}
// File: contracts/modules/common/GuardianUtils.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
/**
 * @title GuardianUtils
 * @notice Bundles guardian read logic.
 */
library GuardianUtils {
    /**
    * @notice Checks if an address is a guardian or an account authorised to sign on behalf of a smart-contract guardian
    * given a list of guardians.
    * @param _guardians the list of guardians
    * @param _guardian the address to test
    * @return true and the list of guardians minus the found guardian upon success, false and the original list of guardians if not found.
    */
    function isGuardianOrGuardianSigner(address[] memory _guardians, address _guardian) internal view returns (bool, address[] memory) {
        if (_guardians.length == 0 || _guardian == address(0)) {
            return (false, _guardians);
        }
        bool isFound = false;
        address[] memory updatedGuardians = new address[](_guardians.length - 1);
        uint256 index = 0;
        for (uint256 i = 0; i < _guardians.length; i++) {
            if (!isFound) {
                // check if _guardian is an account guardian
                if (_guardian == _guardians[i]) {
                    isFound = true;
                    continue;
                }
                // check if _guardian is the owner of a smart contract guardian
                if (isContract(_guardians[i]) && isGuardianOwner(_guardians[i], _guardian)) {
                    isFound = true;
                    continue;
                }
            }
            if (index < updatedGuardians.length) {
                updatedGuardians[index] = _guardians[i];
                index++;
            }
        }
        return isFound ? (true, updatedGuardians) : (false, _guardians);
    }
   /**
    * @notice Checks if an address is a contract.
    * @param _addr The address.
    */
    function isContract(address _addr) internal view returns (bool) {
        uint32 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(_addr)
        }
        return (size > 0);
    }
    /**
    * @notice Checks if an address is the owner of a guardian contract.
    * The method does not revert if the call to the owner() method consumes more then 5000 gas.
    * @param _guardian The guardian contract
    * @param _owner The owner to verify.
    */
    function isGuardianOwner(address _guardian, address _owner) internal view returns (bool) {
        address owner = address(0);
        bytes4 sig = bytes4(keccak256("owner()"));
        // solhint-disable-next-line no-inline-assembly
        assembly {
            let ptr := mload(0x40)
            mstore(ptr,sig)
            let result := staticcall(5000, _guardian, ptr, 0x20, ptr, 0x20)
            if eq(result, 1) {
                owner := mload(ptr)
            }
        }
        return owner == _owner;
    }
}
// File: contracts/infrastructure/ITokenPriceRegistry.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
/**
 * @title ITokenPriceRegistry
 * @notice TokenPriceRegistry interface
 */
interface ITokenPriceRegistry {
    function getTokenPrice(address _token) external view returns (uint184 _price);
    function isTokenTradable(address _token) external view returns (bool _isTradable);
}
// File: contracts/modules/common/LimitUtils.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
/**
 * @title LimitUtils
 * @notice Helper library to manage the daily limit and interact with a contract implementing the ILimitStorage interface.
 * @author Julien Niset - <julien@argent.xyz>
 */
library LimitUtils {
    // large limit when the limit can be considered disabled
    uint128 constant internal LIMIT_DISABLED = uint128(-1);
    using SafeMath for uint256;
    // *************** Internal Functions ********************* //
    /**
     * @notice Changes the daily limit (expressed in ETH).
     * Decreasing the limit is immediate while increasing the limit is pending for the security period.
     * @param _lStorage The storage contract.
     * @param _versionManager The version manager.
     * @param _wallet The target wallet.
     * @param _targetLimit The target limit.
     * @param _securityPeriod The security period.
     */
    function changeLimit(
        ILimitStorage _lStorage,
        IVersionManager _versionManager,
        address _wallet,
        uint256 _targetLimit,
        uint256 _securityPeriod
    )
        internal
        returns (ILimitStorage.Limit memory)
    {
        ILimitStorage.Limit memory limit = _lStorage.getLimit(_wallet);
        uint256 currentLimit = currentLimit(limit);
        ILimitStorage.Limit memory newLimit;
        if (_targetLimit <= currentLimit) {
            uint128 targetLimit = safe128(_targetLimit);
            newLimit = ILimitStorage.Limit(targetLimit, targetLimit, safe64(block.timestamp));
        } else {
            newLimit = ILimitStorage.Limit(safe128(currentLimit), safe128(_targetLimit), safe64(block.timestamp.add(_securityPeriod)));
        }
        setLimit(_versionManager, _lStorage, _wallet, newLimit);
        return newLimit;
    }
     /**
     * @notice Disable the daily limit.
     * The change is pending for the security period.
     * @param _lStorage The storage contract.
     * @param _versionManager The version manager.
     * @param _wallet The target wallet.
     * @param _securityPeriod The security period.
     */
    function disableLimit(
        ILimitStorage _lStorage,
        IVersionManager _versionManager,
        address _wallet,
        uint256 _securityPeriod
    )
        internal
    {
        changeLimit(_lStorage, _versionManager, _wallet, LIMIT_DISABLED, _securityPeriod);
    }
    /**
    * @notice Returns whether the daily limit is disabled for a wallet.
    * @param _wallet The target wallet.
    * @return _limitDisabled true if the daily limit is disabled, false otherwise.
    */
    function isLimitDisabled(ILimitStorage _lStorage, address _wallet) internal view returns (bool) {
        ILimitStorage.Limit memory limit = _lStorage.getLimit(_wallet);
        uint256 currentLimit = currentLimit(limit);
        return (currentLimit == LIMIT_DISABLED);
    }
    /**
    * @notice Checks if a transfer is within the limit. If yes the daily spent is updated.
    * @param _lStorage The storage contract.
    * @param _versionManager The Version Manager.
    * @param _wallet The target wallet.
    * @param _amount The amount for the transfer
    * @return true if the transfer is withing the daily limit.
    */
    function checkAndUpdateDailySpent(
        ILimitStorage _lStorage,
        IVersionManager _versionManager,
        address _wallet,
        uint256 _amount
    )
        internal
        returns (bool)
    {
        (ILimitStorage.Limit memory limit, ILimitStorage.DailySpent memory dailySpent) = _lStorage.getLimitAndDailySpent(_wallet);
        uint256 currentLimit = currentLimit(limit);
        if (_amount == 0 || currentLimit == LIMIT_DISABLED) {
            return true;
        }
        ILimitStorage.DailySpent memory newDailySpent;
        if (dailySpent.periodEnd <= block.timestamp && _amount <= currentLimit) {
            newDailySpent = ILimitStorage.DailySpent(safe128(_amount), safe64(block.timestamp + 24 hours));
            setDailySpent(_versionManager, _lStorage, _wallet, newDailySpent);
            return true;
        } else if (dailySpent.periodEnd > block.timestamp && _amount.add(dailySpent.alreadySpent) <= currentLimit) {
            newDailySpent = ILimitStorage.DailySpent(safe128(_amount.add(dailySpent.alreadySpent)), safe64(dailySpent.periodEnd));
            setDailySpent(_versionManager, _lStorage, _wallet, newDailySpent);
            return true;
        }
        return false;
    }
    /**
    * @notice Helper method to Reset the daily consumption.
    * @param _versionManager The Version Manager.
    * @param _wallet The target wallet.
    */
    function resetDailySpent(IVersionManager _versionManager, ILimitStorage limitStorage, address _wallet) internal {
        setDailySpent(_versionManager, limitStorage, _wallet, ILimitStorage.DailySpent(uint128(0), uint64(0)));
    }
    /**
    * @notice Helper method to get the ether value equivalent of a token amount.
    * @notice For low value amounts of tokens we accept this to return zero as these are small enough to disregard.
    * Note that the price stored for tokens = price for 1 token (in ETH wei) * 10^(18-token decimals).
    * @param _amount The token amount.
    * @param _token The address of the token.
    * @return The ether value for _amount of _token.
    */
    function getEtherValue(ITokenPriceRegistry _priceRegistry, uint256 _amount, address _token) internal view returns (uint256) {
        uint256 price = _priceRegistry.getTokenPrice(_token);
        uint256 etherValue = price.mul(_amount).div(10**18);
        return etherValue;
    }
    /**
    * @notice Helper method to get the current limit from a Limit struct.
    * @param _limit The limit struct
    */
    function currentLimit(ILimitStorage.Limit memory _limit) internal view returns (uint256) {
        if (_limit.changeAfter > 0 && _limit.changeAfter < block.timestamp) {
            return _limit.pending;
        }
        return _limit.current;
    }
    function safe128(uint256 _num) internal pure returns (uint128) {
        require(_num < 2**128, "LU: more then 128 bits");
        return uint128(_num);
    }
    function safe64(uint256 _num) internal pure returns (uint64) {
        require(_num < 2**64, "LU: more then 64 bits");
        return uint64(_num);
    }
    // *************** Storage invocations in VersionManager ********************* //
    function setLimit(
        IVersionManager _versionManager,
        ILimitStorage _lStorage,
        address _wallet, 
        ILimitStorage.Limit memory _limit
    ) internal {
        _versionManager.invokeStorage(
            _wallet,
            address(_lStorage),
            abi.encodeWithSelector(_lStorage.setLimit.selector, _wallet, _limit)
        );
    }
    function setDailySpent(
        IVersionManager _versionManager,
        ILimitStorage _lStorage,
        address _wallet, 
        ILimitStorage.DailySpent memory _dailySpent
    ) private {
        _versionManager.invokeStorage(
            _wallet,
            address(_lStorage),
            abi.encodeWithSelector(_lStorage.setDailySpent.selector, _wallet, _dailySpent)
        );
    }
}
// File: contracts/infrastructure/storage/IGuardianStorage.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
pragma solidity >=0.5.4 <0.7.0;
interface IGuardianStorage {
    /**
     * @notice Lets an authorised module add a guardian to a wallet.
     * @param _wallet The target wallet.
     * @param _guardian The guardian to add.
     */
    function addGuardian(address _wallet, address _guardian) external;
    /**
     * @notice Lets an authorised module revoke a guardian from a wallet.
     * @param _wallet The target wallet.
     * @param _guardian The guardian to revoke.
     */
    function revokeGuardian(address _wallet, address _guardian) external;
    /**
     * @notice Checks if an account is a guardian for a wallet.
     * @param _wallet The target wallet.
     * @param _guardian The account.
     * @return true if the account is a guardian for a wallet.
     */
    function isGuardian(address _wallet, address _guardian) external view returns (bool);
    function isLocked(address _wallet) external view returns (bool);
    function getLock(address _wallet) external view returns (uint256);
    function getLocker(address _wallet) external view returns (address);
    function setLock(address _wallet, uint256 _releaseAfter) external;
    function getGuardians(address _wallet) external view returns (address[] memory);
    function guardianCount(address _wallet) external view returns (uint256);
}
// File: modules/RelayerManager.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
/**
 * @title RelayerManager
 * @notice Feature to execute transactions signed by ETH-less accounts and sent by a relayer.
 * @author Julien Niset <julien@argent.xyz>, Olivier VDB <olivier@argent.xyz>
 */
contract RelayerManager is BaseFeature {
    bytes32 constant NAME = "RelayerManager";
    uint256 constant internal BLOCKBOUND = 10000;
    using SafeMath for uint256;
    mapping (address => RelayerConfig) public relayer;
    // The storage of the limit
    ILimitStorage public limitStorage;
    // The Token price storage
    ITokenPriceRegistry public tokenPriceRegistry;
    // The Guardian storage
    IGuardianStorage public guardianStorage;
    struct RelayerConfig {
        uint256 nonce;
        mapping (bytes32 => bool) executedTx;
    }
    // Used to avoid stack too deep error
    struct StackExtension {
        uint256 requiredSignatures;
        OwnerSignature ownerSignatureRequirement;
        bytes32 signHash;
        bool success;
        bytes returnData;
    }
    event TransactionExecuted(address indexed wallet, bool indexed success, bytes returnData, bytes32 signedHash);
    event Refund(address indexed wallet, address indexed refundAddress, address refundToken, uint256 refundAmount);
    /* ***************** External methods ************************* */
    constructor(
        ILockStorage _lockStorage,
        IGuardianStorage _guardianStorage,
        ILimitStorage _limitStorage,
        ITokenPriceRegistry _tokenPriceRegistry,
        IVersionManager _versionManager
    )
        BaseFeature(_lockStorage, _versionManager, NAME)
        public
    {
        limitStorage = _limitStorage;
        tokenPriceRegistry = _tokenPriceRegistry;
        guardianStorage = _guardianStorage;
    }
    /**
    * @notice Executes a relayed transaction.
    * @param _wallet The target wallet.
    * @param _feature The target feature.
    * @param _data The data for the relayed transaction
    * @param _nonce The nonce used to prevent replay attacks.
    * @param _signatures The signatures as a concatenated byte array.
    * @param _gasPrice The gas price to use for the gas refund.
    * @param _gasLimit The gas limit to use for the gas refund.
    * @param _refundToken The token to use for the gas refund.
    * @param _refundAddress The address refunded to prevent front-running.
    */
    function execute(
        address _wallet,
        address _feature,
        bytes calldata _data,
        uint256 _nonce,
        bytes calldata _signatures,
        uint256 _gasPrice,
        uint256 _gasLimit,
        address _refundToken,
        address _refundAddress
    )
        external
        returns (bool)
    {
        uint startGas = gasleft();
        require(startGas >= _gasLimit, "RM: not enough gas provided");
        require(verifyData(_wallet, _data), "RM: Target of _data != _wallet");
        require(isFeatureAuthorisedInVersionManager(_wallet, _feature), "RM: feature not authorised");
        StackExtension memory stack;
        (stack.requiredSignatures, stack.ownerSignatureRequirement) = IFeature(_feature).getRequiredSignatures(_wallet, _data);
        require(stack.requiredSignatures > 0 || stack.ownerSignatureRequirement == OwnerSignature.Anyone, "RM: Wrong signature requirement");
        require(stack.requiredSignatures * 65 == _signatures.length, "RM: Wrong number of signatures");
        stack.signHash = getSignHash(
            address(this),
            _feature,
            0,
            _data,
            _nonce,
            _gasPrice,
            _gasLimit,
            _refundToken,
            _refundAddress);
        require(checkAndUpdateUniqueness(
            _wallet,
            _nonce,
            stack.signHash,
            stack.requiredSignatures,
            stack.ownerSignatureRequirement), "RM: Duplicate request");
        require(validateSignatures(_wallet, stack.signHash, _signatures, stack.ownerSignatureRequirement), "RM: Invalid signatures");
        (stack.success, stack.returnData) = _feature.call(_data);
        // only refund when approved by owner and positive gas price
        if (_gasPrice > 0 && stack.ownerSignatureRequirement == OwnerSignature.Required) {
            refund(
                _wallet,
                startGas,
                _gasPrice,
                _gasLimit,
                _refundToken,
                _refundAddress,
                stack.requiredSignatures);
        }
        emit TransactionExecuted(_wallet, stack.success, stack.returnData, stack.signHash);
        return stack.success;
    }
    /**
    * @notice Gets the current nonce for a wallet.
    * @param _wallet The target wallet.
    */
    function getNonce(address _wallet) external view returns (uint256 nonce) {
        return relayer[_wallet].nonce;
    }
    /**
    * @notice Checks if a transaction identified by its sign hash has already been executed.
    * @param _wallet The target wallet.
    * @param _signHash The sign hash of the transaction.
    */
    function isExecutedTx(address _wallet, bytes32 _signHash) external view returns (bool executed) {
        return relayer[_wallet].executedTx[_signHash];
    }
    /* ***************** Internal & Private methods ************************* */
    /**
    * @notice Generates the signed hash of a relayed transaction according to ERC 1077.
    * @param _from The starting address for the relayed transaction (should be the relayer module)
    * @param _to The destination address for the relayed transaction (should be the target module)
    * @param _value The value for the relayed transaction.
    * @param _data The data for the relayed transaction which includes the wallet address.
    * @param _nonce The nonce used to prevent replay attacks.
    * @param _gasPrice The gas price to use for the gas refund.
    * @param _gasLimit The gas limit to use for the gas refund.
    * @param _refundToken The token to use for the gas refund.
    * @param _refundAddress The address refunded to prevent front-running.
    */
    function getSignHash(
        address _from,
        address _to,
        uint256 _value,
        bytes memory _data,
        uint256 _nonce,
        uint256 _gasPrice,
        uint256 _gasLimit,
        address _refundToken,
        address _refundAddress
    )
        internal
        pure
        returns (bytes32)
    {
        return keccak256(
            abi.encodePacked(
                "\x19Ethereum Signed Message:\n32",
                keccak256(abi.encodePacked(
                    byte(0x19),
                    byte(0),
                    _from,
                    _to,
                    _value,
                    _data,
                    getChainId(),
                    _nonce,
                    _gasPrice,
                    _gasLimit,
                    _refundToken,
                    _refundAddress))
        ));
    }
    /**
    * @notice Checks if the relayed transaction is unique. If yes the state is updated.
    * For actions requiring 1 signature by the owner we use the incremental nonce.
    * For all other actions we check/store the signHash in a mapping.
    * @param _wallet The target wallet.
    * @param _nonce The nonce.
    * @param _signHash The signed hash of the transaction.
    * @param requiredSignatures The number of signatures required.
    * @param ownerSignatureRequirement The wallet owner signature requirement.
    * @return true if the transaction is unique.
    */
    function checkAndUpdateUniqueness(
        address _wallet,
        uint256 _nonce,
        bytes32 _signHash,
        uint256 requiredSignatures,
        OwnerSignature ownerSignatureRequirement
    )
        internal
        returns (bool)
    {
        if (requiredSignatures == 1 && ownerSignatureRequirement == OwnerSignature.Required) {
            // use the incremental nonce
            if (_nonce <= relayer[_wallet].nonce) {
                return false;
            }
            uint256 nonceBlock = (_nonce & 0xffffffffffffffffffffffffffffffff00000000000000000000000000000000) >> 128;
            if (nonceBlock > block.number + BLOCKBOUND) {
                return false;
            }
            relayer[_wallet].nonce = _nonce;
            return true;
        } else {
            // use the txHash map
            if (relayer[_wallet].executedTx[_signHash] == true) {
                return false;
            }
            relayer[_wallet].executedTx[_signHash] = true;
            return true;
        }
    }
    /**
    * @notice Validates the signatures provided with a relayed transaction.
    * The method MUST throw if one or more signatures are not valid.
    * @param _wallet The target wallet.
    * @param _signHash The signed hash representing the relayed transaction.
    * @param _signatures The signatures as a concatenated byte array.
    * @param _option An enum indicating whether the owner is required, optional or disallowed.
    * @return A boolean indicating whether the signatures are valid.
    */
    function validateSignatures(
        address _wallet,
        bytes32 _signHash,
        bytes memory _signatures,
        OwnerSignature _option
    )
        internal
        view
        returns (bool)
    {
        if (_signatures.length == 0) {
            return true;
        }
        address lastSigner = address(0);
        address[] memory guardians;
        if (_option != OwnerSignature.Required || _signatures.length > 65) {
            guardians = guardianStorage.getGuardians(_wallet); // guardians are only read if they may be needed
        }
        bool isGuardian;
        for (uint256 i = 0; i < _signatures.length / 65; i++) {
            address signer = Utils.recoverSigner(_signHash, _signatures, i);
            if (i == 0) {
                if (_option == OwnerSignature.Required) {
                    // First signer must be owner
                    if (isOwner(_wallet, signer)) {
                        continue;
                    }
                    return false;
                } else if (_option == OwnerSignature.Optional) {
                    // First signer can be owner
                    if (isOwner(_wallet, signer)) {
                        continue;
                    }
                }
            }
            if (signer <= lastSigner) {
                return false; // Signers must be different
            }
            lastSigner = signer;
            (isGuardian, guardians) = GuardianUtils.isGuardianOrGuardianSigner(guardians, signer);
            if (!isGuardian) {
                return false;
            }
        }
        return true;
    }
    /**
    * @notice Refunds the gas used to the Relayer.
    * @param _wallet The target wallet.
    * @param _startGas The gas provided at the start of the execution.
    * @param _gasPrice The gas price for the refund.
    * @param _gasLimit The gas limit for the refund.
    * @param _refundToken The token to use for the gas refund.
    * @param _refundAddress The address refunded to prevent front-running.
    * @param _requiredSignatures The number of signatures required.
    */
    function refund(
        address _wallet,
        uint _startGas,
        uint _gasPrice,
        uint _gasLimit,
        address _refundToken,
        address _refundAddress,
        uint256 _requiredSignatures
    )
        internal
    {
        address refundAddress = _refundAddress == address(0) ? msg.sender : _refundAddress;
        uint256 refundAmount;
        // skip daily limit when approved by guardians (and signed by owner)
        if (_requiredSignatures > 1) {
            uint256 gasConsumed = _startGas.sub(gasleft()).add(30000);
            refundAmount = Utils.min(gasConsumed, _gasLimit).mul(_gasPrice);
        } else {
            uint256 gasConsumed = _startGas.sub(gasleft()).add(40000);
            refundAmount = Utils.min(gasConsumed, _gasLimit).mul(_gasPrice);
            uint256 ethAmount = (_refundToken == ETH_TOKEN) ? refundAmount : LimitUtils.getEtherValue(tokenPriceRegistry, refundAmount, _refundToken);
            require(LimitUtils.checkAndUpdateDailySpent(limitStorage, versionManager, _wallet, ethAmount), "RM: refund is above daily limit");
        }
        // refund in ETH or ERC20
        if (_refundToken == ETH_TOKEN) {
            invokeWallet(_wallet, refundAddress, refundAmount, EMPTY_BYTES);
        } else {
            bytes memory methodData = abi.encodeWithSignature("transfer(address,uint256)", refundAddress, refundAmount);
		    bytes memory transferSuccessBytes = invokeWallet(_wallet, _refundToken, 0, methodData);
            // Check token refund is successful, when `transfer` returns a success bool result
            if (transferSuccessBytes.length > 0) {
                require(abi.decode(transferSuccessBytes, (bool)), "RM: Refund transfer failed");
            }
        }
        emit Refund(_wallet, refundAddress, _refundToken, refundAmount);
    }
   /**
    * @notice Returns the current chainId
    * @return chainId the chainId
    */
    function getChainId() private pure returns (uint256 chainId) {
        // solhint-disable-next-line no-inline-assembly
        assembly { chainId := chainid() }
    }
}

// Copyright (C) 2020  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IModuleRegistry
 * @notice Interface for the registry of authorised modules.
 */
interface IModuleRegistry {
    function registerModule(address _module, bytes32 _name) external;
    function deregisterModule(address _module) external;
    function registerUpgrader(address _upgrader, bytes32 _name) external;
    function deregisterUpgrader(address _upgrader) external;
    function recoverToken(address _token) external;
    function moduleInfo(address _module) external view returns (bytes32);
    function upgraderInfo(address _upgrader) external view returns (bytes32);
    function isRegisteredModule(address _module) external view returns (bool);
    function isRegisteredModule(address[] calldata _modules) external view returns (bool);
    function isRegisteredUpgrader(address _upgrader) external view returns (bool);
}// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.12;
/**
 * @title ITokenPriceRegistry
 * @notice TokenPriceRegistry interface
 */
interface ITokenPriceRegistry {
    function getTokenPrice(address _token) external view returns (uint184 _price);
    function isTokenTradable(address _token) external view returns (bool _isTradable);
}// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
/**
 * @title ILimitStorage
 * @notice LimitStorage interface
 */
interface ILimitStorage {
    struct Limit {
        // the current limit
        uint128 current;
        // the pending limit if any
        uint128 pending;
        // when the pending limit becomes the current limit
        uint64 changeAfter;
    }
    struct DailySpent {
        // The amount already spent during the current period
        uint128 alreadySpent;
        // The end of the current period
        uint64 periodEnd;
    }
    function setLimit(address _wallet, Limit memory _limit) external;
    function getLimit(address _wallet) external view returns (Limit memory _limit);
    function setDailySpent(address _wallet, DailySpent memory _dailySpent) external;
    function getDailySpent(address _wallet) external view returns (DailySpent memory _dailySpent);
    function setLimitAndDailySpent(address _wallet, Limit memory _limit, DailySpent memory _dailySpent) external;
    function getLimitAndDailySpent(address _wallet) external view returns (Limit memory _limit, DailySpent memory _dailySpent);
}// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.4 <0.7.0;
interface ILockStorage {
    function isLocked(address _wallet) external view returns (bool);
    function getLock(address _wallet) external view returns (uint256);
    function getLocker(address _wallet) external view returns (address);
    function setLock(address _wallet, address _locker, uint256 _releaseAfter) external;
}// Copyright (C) 2020  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title ITransferStorage
 * @notice TransferStorage interface
 */
interface ITransferStorage {
    function setWhitelist(address _wallet, address _target, uint256 _value) external;
    function getWhitelist(address _wallet, address _target) external view returns (uint256);
}// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
import "./common/Utils.sol";
import "./common/BaseTransfer.sol";
import "./common/LimitUtils.sol";
import "../infrastructure/storage/ILimitStorage.sol";
import "../infrastructure/storage/ITransferStorage.sol";
import "../infrastructure/ITokenPriceRegistry.sol";
import "../../lib/other/ERC20.sol";
/**
 * @title TransferManager
 * @notice Feature to transfer and approve tokens (ETH or ERC20) or data (contract call) based on a security context (daily limit, whitelist, etc).
 * @author Julien Niset - <julien@argent.xyz>
 */
contract TransferManager is BaseTransfer {
    bytes32 constant NAME = "TransferManager";
    bytes4 private constant ERC1271_ISVALIDSIGNATURE_BYTES32 = bytes4(keccak256("isValidSignature(bytes32,bytes)"));
    enum ActionType { Transfer }
    using SafeMath for uint256;
    struct TokenManagerConfig {
        // Mapping between pending action hash and their timestamp
        mapping (bytes32 => uint256) pendingActions;
    }
    // wallet specific storage
    mapping (address => TokenManagerConfig) internal configs;
    // The security period
    uint256 public securityPeriod;
    // The execution window
    uint256 public securityWindow;
    // The default limit
    uint128 public defaultLimit;
    // The Token storage
    ITransferStorage public transferStorage;
    // The previous limit manager needed to migrate the limits
    TransferManager public oldTransferManager;
    // The limit storage
    ILimitStorage public limitStorage;
    // The token price storage
    ITokenPriceRegistry public tokenPriceRegistry;
    // *************** Events *************************** //
    event AddedToWhitelist(address indexed wallet, address indexed target, uint64 whitelistAfter);
    event RemovedFromWhitelist(address indexed wallet, address indexed target);
    event PendingTransferCreated(address indexed wallet, bytes32 indexed id, uint256 indexed executeAfter,
    address token, address to, uint256 amount, bytes data);
    event PendingTransferExecuted(address indexed wallet, bytes32 indexed id);
    event PendingTransferCanceled(address indexed wallet, bytes32 indexed id);
    event DailyLimitMigrated(address indexed wallet, uint256 currentDailyLimit, uint256 pendingDailyLimit, uint256 changeDailyLimitAfter);
    event DailyLimitDisabled(address indexed wallet, uint256 securityPeriod);
    // *************** Constructor ********************** //
    constructor(
        ILockStorage _lockStorage,
        ITransferStorage _transferStorage,
        ILimitStorage _limitStorage,
        ITokenPriceRegistry _tokenPriceRegistry,
        IVersionManager _versionManager,
        uint256 _securityPeriod,
        uint256 _securityWindow,
        uint256 _defaultLimit,
        address _wethToken,
        TransferManager _oldTransferManager
    )
        BaseFeature(_lockStorage, _versionManager, NAME)
        BaseTransfer(_wethToken)
        public
    {
        transferStorage = _transferStorage;
        limitStorage = _limitStorage;
        tokenPriceRegistry = _tokenPriceRegistry;
        securityPeriod = _securityPeriod;
        securityWindow = _securityWindow;
        defaultLimit = LimitUtils.safe128(_defaultLimit);
        oldTransferManager = _oldTransferManager;
    }
    /**
     * @inheritdoc IFeature
     */
    function getRequiredSignatures(address, bytes calldata) external view override returns (uint256, OwnerSignature) {
        return (1, OwnerSignature.Required);
    }
    /**
     * @inheritdoc IFeature
     */
    function getStaticCallSignatures() external virtual override view returns (bytes4[] memory _sigs) {
        _sigs = new bytes4[](1);
        _sigs[0] = ERC1271_ISVALIDSIGNATURE_BYTES32;
    }
    /**
     * @notice Inits the feature for a wallet by setting up the isValidSignature (EIP 1271)
     * static call redirection from the wallet to the feature and copying all the parameters
     * of the daily limit from the previous implementation of the LimitManager module.
     * @param _wallet The target wallet.
     */
    function init(address _wallet) external override(BaseFeature) onlyVersionManager {
        if (address(oldTransferManager) == address(0)) {
            setLimit(_wallet, ILimitStorage.Limit(defaultLimit, 0, 0));
        } else {
            uint256 current = oldTransferManager.getCurrentLimit(_wallet);
            (uint256 pending, uint64 changeAfter) = oldTransferManager.getPendingLimit(_wallet);
            if (current == 0 && changeAfter == 0) {
                // new wallet: we setup the default limit
                setLimit(_wallet, ILimitStorage.Limit(defaultLimit, 0, 0));
            } else {
                // migrate limit and daily spent (if we are in a rolling period)
                (uint256 unspent, uint64 periodEnd) = oldTransferManager.getDailyUnspent(_wallet);
                if (periodEnd < block.timestamp) {
                    setLimit(_wallet, ILimitStorage.Limit(LimitUtils.safe128(current), LimitUtils.safe128(pending), changeAfter));
                } else {
                    setLimitAndDailySpent(
                        _wallet,
                        ILimitStorage.Limit(LimitUtils.safe128(current), LimitUtils.safe128(pending), changeAfter),
                        ILimitStorage.DailySpent(LimitUtils.safe128(current.sub(unspent)), periodEnd)
                    );
                }
                emit DailyLimitMigrated(_wallet, current, pending, changeAfter);
            }
        }
    }
    // *************** External/Public Functions ********************* //
    /**
    * @notice Lets the owner transfer tokens (ETH or ERC20) from a wallet.
    * @param _wallet The target wallet.
    * @param _token The address of the token to transfer.
    * @param _to The destination address
    * @param _amount The amoutn of token to transfer
    * @param _data The data for the transaction
    */
    function transferToken(
        address _wallet,
        address _token,
        address _to,
        uint256 _amount,
        bytes calldata _data
    )
        external
        onlyWalletOwnerOrFeature(_wallet)
        onlyWhenUnlocked(_wallet)
    {
        if (isWhitelisted(_wallet, _to)) {
            // transfer to whitelist
            doTransfer(_wallet, _token, _to, _amount, _data);
        } else {
            uint256 etherAmount = (_token == ETH_TOKEN) ? _amount : LimitUtils.getEtherValue(tokenPriceRegistry, _amount, _token);
            if (LimitUtils.checkAndUpdateDailySpent(limitStorage, versionManager, _wallet, etherAmount)) {
                // transfer under the limit
                doTransfer(_wallet, _token, _to, _amount, _data);
            } else {
                // transfer above the limit
                (bytes32 id, uint256 executeAfter) = addPendingAction(ActionType.Transfer, _wallet, _token, _to, _amount, _data);
                emit PendingTransferCreated(_wallet, id, executeAfter, _token, _to, _amount, _data);
            }
        }
    }
    /**
    * @notice Lets the owner approve an allowance of ERC20 tokens for a spender (dApp).
    * @param _wallet The target wallet.
    * @param _token The address of the token to transfer.
    * @param _spender The address of the spender
    * @param _amount The amount of tokens to approve
    */
    function approveToken(
        address _wallet,
        address _token,
        address _spender,
        uint256 _amount
    )
        external
        onlyWalletOwnerOrFeature(_wallet)
        onlyWhenUnlocked(_wallet)
    {
        if (isWhitelisted(_wallet, _spender)) {
            // approve to whitelist
            doApproveToken(_wallet, _token, _spender, _amount);
        } else {
            // get current alowance
            uint256 currentAllowance = ERC20(_token).allowance(_wallet, _spender);
            if (_amount <= currentAllowance) {
                // approve if we reduce the allowance
                doApproveToken(_wallet, _token, _spender, _amount);
            } else {
                // check if delta is under the limit
                uint delta = _amount - currentAllowance;
                uint256 deltaInEth = LimitUtils.getEtherValue(tokenPriceRegistry, delta, _token);
                require(LimitUtils.checkAndUpdateDailySpent(limitStorage, versionManager, _wallet, deltaInEth), "TM: Approve above daily limit");
                // approve if under the limit
                doApproveToken(_wallet, _token, _spender, _amount);
            }
        }
    }
    /**
    * @notice Lets the owner call a contract.
    * @param _wallet The target wallet.
    * @param _contract The address of the contract.
    * @param _value The amount of ETH to transfer as part of call
    * @param _data The encoded method data
    */
    function callContract(
        address _wallet,
        address _contract,
        uint256 _value,
        bytes calldata _data
    )
        external
        onlyWalletOwnerOrFeature(_wallet)
        onlyWhenUnlocked(_wallet)
        onlyAuthorisedContractCall(_wallet, _contract)
    {
        checkAndUpdateDailySpentIfNeeded(_wallet, ETH_TOKEN, _value, _contract);
        doCallContract(_wallet, _contract, _value, _data);
    }
    /**
    * @notice Lets the owner do an ERC20 approve followed by a call to a contract.
    * We assume that the contract will pull the tokens and does not require ETH.
    * @param _wallet The target wallet.
    * @param _token The token to approve.
    * @param _proxy The address to approve, which may be different from the contract being called.
    * @param _amount The amount of ERC20 tokens to approve.
    * @param _contract The address of the contract.
    * @param _data The encoded method data
    */
    function approveTokenAndCallContract(
        address _wallet,
        address _token,
        address _proxy,
        uint256 _amount,
        address _contract,
        bytes calldata _data
    )
        external
        onlyWalletOwnerOrFeature(_wallet)
        onlyWhenUnlocked(_wallet)
        onlyAuthorisedContractCall(_wallet, _contract)
    {
        checkAndUpdateDailySpentIfNeeded(_wallet, _token, _amount, _contract);
        doApproveTokenAndCallContract(_wallet, _token, _proxy, _amount, _contract, _data);
    }
    /**
    * @notice Lets the owner wrap ETH into WETH, approve the WETH and call a contract.
    * We assume that the contract will pull the tokens and does not require ETH.
    * @param _wallet The target wallet.
    * @param _proxy The address to approve, which may be different from the contract being called.
    * @param _amount The amount of ETH to wrap and approve.
    * @param _contract The address of the contract.
    * @param _data The encoded method data
    */
    function approveWethAndCallContract(
        address _wallet,
        address _proxy,
        uint256 _amount,
        address _contract,
        bytes calldata _data
    )
        external
        onlyWalletOwnerOrFeature(_wallet)
        onlyWhenUnlocked(_wallet)
        onlyAuthorisedContractCall(_wallet, _contract)
    {
        checkAndUpdateDailySpentIfNeeded(_wallet, wethToken, _amount, _contract);
        doApproveWethAndCallContract(_wallet, _proxy, _amount, _contract, _data);
    }
    /**
     * @notice Adds an address to the whitelist of a wallet.
     * @param _wallet The target wallet.
     * @param _target The address to add.
     */
    function addToWhitelist(
        address _wallet,
        address _target
    )
        external
        onlyWalletOwnerOrFeature(_wallet)
        onlyWhenUnlocked(_wallet)
    {
        require(!isWhitelisted(_wallet, _target), "TT: target already whitelisted");
        uint256 whitelistAfter = block.timestamp.add(securityPeriod);
        setWhitelist(_wallet, _target, whitelistAfter);
        emit AddedToWhitelist(_wallet, _target, uint64(whitelistAfter));
    }
    /**
     * @notice Removes an address from the whitelist of a wallet.
     * @param _wallet The target wallet.
     * @param _target The address to remove.
     */
    function removeFromWhitelist(
        address _wallet,
        address _target
    )
        external
        onlyWalletOwnerOrFeature(_wallet)
        onlyWhenUnlocked(_wallet)
    {
        setWhitelist(_wallet, _target, 0);
        emit RemovedFromWhitelist(_wallet, _target);
    }
    /**
    * @notice Executes a pending transfer for a wallet.
    * The method can be called by anyone to enable orchestration.
    * @param _wallet The target wallet.
    * @param _token The token of the pending transfer.
    * @param _to The destination address of the pending transfer.
    * @param _amount The amount of token to transfer of the pending transfer.
    * @param _data The data associated to the pending transfer.
    * @param _block The block at which the pending transfer was created.
    */
    function executePendingTransfer(
        address _wallet,
        address _token,
        address _to,
        uint _amount,
        bytes calldata _data,
        uint _block
    )
        external
        onlyWhenUnlocked(_wallet)
    {
        bytes32 id = keccak256(abi.encodePacked(ActionType.Transfer, _token, _to, _amount, _data, _block));
        uint executeAfter = configs[_wallet].pendingActions[id];
        require(executeAfter > 0, "TT: unknown pending transfer");
        uint executeBefore = executeAfter.add(securityWindow);
        require(executeAfter <= block.timestamp && block.timestamp <= executeBefore, "TT: transfer outside of the execution window");
        delete configs[_wallet].pendingActions[id];
        doTransfer(_wallet, _token, _to, _amount, _data);
        emit PendingTransferExecuted(_wallet, id);
    }
    function cancelPendingTransfer(
        address _wallet,
        bytes32 _id
    )
        external
        onlyWalletOwnerOrFeature(_wallet)
        onlyWhenUnlocked(_wallet)
    {
        require(configs[_wallet].pendingActions[_id] > 0, "TT: unknown pending action");
        delete configs[_wallet].pendingActions[_id];
        emit PendingTransferCanceled(_wallet, _id);
    }
    /**
     * @notice Lets the owner of a wallet change its daily limit.
     * The limit is expressed in ETH. Changes to the limit take 24 hours.
     * @param _wallet The target wallet.
     * @param _newLimit The new limit.
     */
    function changeLimit(address _wallet, uint256 _newLimit) external onlyWalletOwnerOrFeature(_wallet) onlyWhenUnlocked(_wallet) {
        ILimitStorage.Limit memory limit = LimitUtils.changeLimit(limitStorage, versionManager, _wallet, _newLimit, securityPeriod);
        emit LimitChanged(_wallet, _newLimit, limit.changeAfter);
    }
    /**
     * @notice Convenience method to disable the limit
     * The limit is disabled by setting it to an arbitrary large value.
     * @param _wallet The target wallet.
     */
    function disableLimit(address _wallet) external onlyWalletOwnerOrFeature(_wallet) onlyWhenUnlocked(_wallet) {
        LimitUtils.disableLimit(limitStorage, versionManager, _wallet, securityPeriod);
        emit DailyLimitDisabled(_wallet, securityPeriod);
    }
    /**
    * @notice Gets the current daily limit for a wallet.
    * @param _wallet The target wallet.
    * @return _currentLimit The current limit expressed in ETH.
    */
    function getCurrentLimit(address _wallet) external view returns (uint256 _currentLimit) {
        ILimitStorage.Limit memory limit = limitStorage.getLimit(_wallet);
        return LimitUtils.currentLimit(limit);
    }
    /**
    * @notice Returns whether the daily limit is disabled for a wallet.
    * @param _wallet The target wallet.
    * @return _limitDisabled true if the daily limit is disabled, false otherwise.
    */
    function isLimitDisabled(address _wallet) public view returns (bool _limitDisabled) {
        return LimitUtils.isLimitDisabled(limitStorage, _wallet);
    }
    /**
    * @notice Gets a pending limit for a wallet if any.
    * @param _wallet The target wallet.
    * @return _pendingLimit The pending limit (in ETH).
    * @return _changeAfter The time at which the pending limit will become effective.
    */
    function getPendingLimit(address _wallet) external view returns (uint256 _pendingLimit, uint64 _changeAfter) {
        ILimitStorage.Limit memory limit = limitStorage.getLimit(_wallet);
        return ((block.timestamp < limit.changeAfter)? (limit.pending, uint64(limit.changeAfter)) : (0,0));
    }
    /**
    * @notice Gets the amount of tokens that has not yet been spent during the current period.
    * @param _wallet The target wallet.
    * @return _unspent The amount of tokens (in ETH) that has not been spent yet.
    * @return _periodEnd The end of the daily period.
    */
    function getDailyUnspent(address _wallet) external view returns (uint256 _unspent, uint64 _periodEnd) {
        (
            ILimitStorage.Limit memory limit,
            ILimitStorage.DailySpent memory dailySpent
        ) = limitStorage.getLimitAndDailySpent(_wallet);
        uint256 currentLimit = LimitUtils.currentLimit(limit);
        if (block.timestamp > dailySpent.periodEnd) {
            return (currentLimit, uint64(block.timestamp.add(24 hours)));
        } else if (dailySpent.alreadySpent < currentLimit) {
            return (currentLimit.sub(dailySpent.alreadySpent), dailySpent.periodEnd);
        } else {
            return (0, dailySpent.periodEnd);
        }
    }
    /**
    * @notice Checks if an address is whitelisted for a wallet.
    * @param _wallet The target wallet.
    * @param _target The address.
    * @return _isWhitelisted true if the address is whitelisted.
    */
    function isWhitelisted(address _wallet, address _target) public view returns (bool _isWhitelisted) {
        uint whitelistAfter = transferStorage.getWhitelist(_wallet, _target);
        
        return whitelistAfter > 0 && whitelistAfter < block.timestamp;
    }
    /**
    * @notice Gets the info of a pending transfer for a wallet.
    * @param _wallet The target wallet.
    * @param _id The pending transfer ID.
    * @return _executeAfter The epoch time at which the pending transfer can be executed.
    */
    function getPendingTransfer(address _wallet, bytes32 _id) external view returns (uint64 _executeAfter) {
        _executeAfter = uint64(configs[address(_wallet)].pendingActions[_id]);
    }
    /**
    * @notice Implementation of EIP 1271.
    * Should return whether the signature provided is valid for the provided data.
    * @param _msgHash Hash of a message signed on the behalf of address(this)
    * @param _signature Signature byte array associated with _msgHash
    */
    function isValidSignature(bytes32 _msgHash, bytes memory _signature) public view returns (bytes4) {
        require(_signature.length == 65, "TM: invalid signature length");
        address signer = Utils.recoverSigner(_msgHash, _signature, 0);
        require(isOwner(msg.sender, signer), "TM: Invalid signer");
        return ERC1271_ISVALIDSIGNATURE_BYTES32;
    }
    // *************** Internal Functions ********************* //
    /**
     * @notice Creates a new pending action for a wallet.
     * @param _action The target action.
     * @param _wallet The target wallet.
     * @param _token The target token for the action.
     * @param _to The recipient of the action.
     * @param _amount The amount of token associated to the action.
     * @param _data The data associated to the action.
     * @return id The identifier for the new pending action.
     * @return executeAfter The time when the action can be executed
     */
    function addPendingAction(
        ActionType _action,
        address _wallet,
        address _token,
        address _to,
        uint _amount,
        bytes memory _data
    )
        internal
        returns (bytes32 id, uint256 executeAfter)
    {
        id = keccak256(abi.encodePacked(_action, _token, _to, _amount, _data, block.number));
        require(configs[_wallet].pendingActions[id] == 0, "TM: duplicate pending action");
        executeAfter = block.timestamp.add(securityPeriod);
        configs[_wallet].pendingActions[id] = executeAfter;
    }
    /**
    * @notice Make sure a contract call is not trying to call a supported ERC20.
    * @param _wallet The target wallet.
    * @param _contract The address of the contract.
     */
    function coveredByDailyLimit(address _wallet, address _contract) internal view returns (bool) {
        return (tokenPriceRegistry.getTokenPrice(_contract) > 0 && !isLimitDisabled(_wallet));
    }
    /**
    * @notice Verify and update the daily spent if the spender is not whitelisted.
    * Reverts if the daily spent is insufficient or if the contract to call is
    * protected by the daily limit (i.e. is a token contract).
    * @param _wallet The target wallet.
    * @param _token The token that the spender will spend.
    * @param _amount The amount of ERC20 or ETH that the spender will spend.
    * @param _contract The address of the contract called by the wallet for the spend to occur.
    */
    function checkAndUpdateDailySpentIfNeeded(
        address _wallet,
        address _token,
        uint256 _amount,
        address _contract
    )
        internal
    {
        if (!isWhitelisted(_wallet, _contract)) {
            // Make sure we don't call a supported ERC20 that's not whitelisted
            require(!coveredByDailyLimit(_wallet, _contract), "TM: Forbidden contract");
            // Check if the amount is under the daily limit.
            // Check the entire amount because the currently approved amount will be restored and should still count towards the daily limit
            uint256 valueInEth;
            if (_token == ETH_TOKEN || _token == wethToken) {
                valueInEth = _amount;
            } else {
                valueInEth = LimitUtils.getEtherValue(tokenPriceRegistry, _amount, _token);
            }
            require(LimitUtils.checkAndUpdateDailySpent(limitStorage, versionManager, _wallet, valueInEth), "TM: Approve above daily limit");
        }
    }
    // *************** Internal Functions ********************* //
    function setWhitelist(address _wallet, address _target, uint256 _whitelistAfter) internal {
        versionManager.invokeStorage(
            _wallet,
            address(transferStorage),
            abi.encodeWithSelector(transferStorage.setWhitelist.selector, _wallet, _target, _whitelistAfter)
        );
    }
    function setLimit(address _wallet, ILimitStorage.Limit memory _limit) internal {
        versionManager.invokeStorage(
            _wallet,
            address(limitStorage),
            abi.encodeWithSelector(limitStorage.setLimit.selector, _wallet, _limit)
        );
    }
    function setLimitAndDailySpent(
        address _wallet,
        ILimitStorage.Limit memory _limit,
        ILimitStorage.DailySpent memory _dailySpent
    ) internal {
        versionManager.invokeStorage(
            _wallet,
            address(limitStorage),
            abi.encodeWithSelector(limitStorage.setLimitAndDailySpent.selector, _wallet, _limit, _dailySpent)
        );
    }
}
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.s
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.12;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../wallet/IWallet.sol";
import "../../infrastructure/IModuleRegistry.sol";
import "../../infrastructure/storage/ILockStorage.sol";
import "./IFeature.sol";
import "../../../lib/other/ERC20.sol";
import "./IVersionManager.sol";
/**
 * @title BaseFeature
 * @notice Base Feature contract that contains methods common to all Feature contracts.
 * @author Julien Niset - <julien@argent.xyz>, Olivier VDB - <olivier@argent.xyz>
 */
contract BaseFeature is IFeature {
    // Empty calldata
    bytes constant internal EMPTY_BYTES = "";
    // Mock token address for ETH
    address constant internal ETH_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    // The address of the Lock storage
    ILockStorage internal lockStorage;
    // The address of the Version Manager
    IVersionManager internal versionManager;
    event FeatureCreated(bytes32 name);
    /**
     * @notice Throws if the wallet is locked.
     */
    modifier onlyWhenUnlocked(address _wallet) {
        require(!lockStorage.isLocked(_wallet), "BF: wallet locked");
        _;
    }
    /**
     * @notice Throws if the sender is not the VersionManager.
     */
    modifier onlyVersionManager() {
        require(msg.sender == address(versionManager), "BF: caller must be VersionManager");
        _;
    }
    /**
     * @notice Throws if the sender is not the owner of the target wallet.
     */
    modifier onlyWalletOwner(address _wallet) {
        require(isOwner(_wallet, msg.sender), "BF: must be wallet owner");
        _;
    }
    /**
     * @notice Throws if the sender is not an authorised feature of the target wallet.
     */
    modifier onlyWalletFeature(address _wallet) {
        require(versionManager.isFeatureAuthorised(_wallet, msg.sender), "BF: must be a wallet feature");
        _;
    }
    /**
     * @notice Throws if the sender is not the owner of the target wallet or the feature itself.
     */
    modifier onlyWalletOwnerOrFeature(address _wallet) {
        // Wrapping in an internal method reduces deployment cost by avoiding duplication of inlined code
        verifyOwnerOrAuthorisedFeature(_wallet, msg.sender);
        _;
    }
    constructor(
        ILockStorage _lockStorage,
        IVersionManager _versionManager,
        bytes32 _name
    ) public {
        lockStorage = _lockStorage;
        versionManager = _versionManager;
        emit FeatureCreated(_name);
    }
    /**
    * @inheritdoc IFeature
    */
    function recoverToken(address _token) external virtual override {
        uint total = ERC20(_token).balanceOf(address(this));
        _token.call(abi.encodeWithSelector(ERC20(_token).transfer.selector, address(versionManager), total));
    }
    /**
     * @notice Inits the feature for a wallet by doing nothing.
     * @dev !! Overriding methods need make sure `init()` can only be called by the VersionManager !!
     * @param _wallet The wallet.
     */
    function init(address _wallet) external virtual override  {}
    /**
     * @inheritdoc IFeature
     */
    function getRequiredSignatures(address, bytes calldata) external virtual view override returns (uint256, OwnerSignature) {
        revert("BF: disabled method");
    }
    /**
     * @inheritdoc IFeature
     */
    function getStaticCallSignatures() external virtual override view returns (bytes4[] memory _sigs) {}
    /**
     * @inheritdoc IFeature
     */
    function isFeatureAuthorisedInVersionManager(address _wallet, address _feature) public override view returns (bool) {
        return versionManager.isFeatureAuthorised(_wallet, _feature);
    }
    /**
    * @notice Checks that the wallet address provided as the first parameter of _data matches _wallet
    * @return false if the addresses are different.
    */
    function verifyData(address _wallet, bytes calldata _data) internal pure returns (bool) {
        require(_data.length >= 36, "RM: Invalid dataWallet");
        address dataWallet = abi.decode(_data[4:], (address));
        return dataWallet == _wallet;
    }
    
     /**
     * @notice Helper method to check if an address is the owner of a target wallet.
     * @param _wallet The target wallet.
     * @param _addr The address.
     */
    function isOwner(address _wallet, address _addr) internal view returns (bool) {
        return IWallet(_wallet).owner() == _addr;
    }
    /**
     * @notice Verify that the caller is an authorised feature or the wallet owner.
     * @param _wallet The target wallet.
     * @param _sender The caller.
     */
    function verifyOwnerOrAuthorisedFeature(address _wallet, address _sender) internal view {
        require(isFeatureAuthorisedInVersionManager(_wallet, _sender) || isOwner(_wallet, _sender), "BF: must be owner or feature");
    }
    /**
     * @notice Helper method to invoke a wallet.
     * @param _wallet The target wallet.
     * @param _to The target address for the transaction.
     * @param _value The value of the transaction.
     * @param _data The data of the transaction.
     */
    function invokeWallet(address _wallet, address _to, uint256 _value, bytes memory _data)
        internal
        returns (bytes memory _res) 
    {
        _res = versionManager.checkAuthorisedFeatureAndInvokeWallet(_wallet, _to, _value, _data);
    }
}// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.12;
import "./BaseFeature.sol";
import "./LimitUtils.sol";
/**
 * @title BaseTransfer
 * @notice Contains common methods to transfer tokens or call third-party contracts.
 * @author Olivier VDB - <olivier@argent.xyz>
 */
abstract contract BaseTransfer is BaseFeature {
    // The address of the WETH token
    address public wethToken;
    // *************** Events *************************** //
    event Transfer(address indexed wallet, address indexed token, uint256 indexed amount, address to, bytes data);
    event Approved(address indexed wallet, address indexed token, uint256 amount, address spender);
    event CalledContract(address indexed wallet, address indexed to, uint256 amount, bytes data);
    event ApprovedAndCalledContract(
        address indexed wallet,
        address indexed to,
        address spender,
        address indexed token,
        uint256 amountApproved,
        uint256 amountSpent,
        bytes data
    );
    event LimitChanged(address indexed wallet, uint indexed newLimit, uint64 indexed startAfter);
    // *************** Constructor ********************** //
    constructor(address _wethToken) public {
        wethToken = _wethToken;
    }
            
    // *************** Internal Functions ********************* //
    /**
    * @notice Make sure a contract call is not trying to call a module, a feature, or the wallet itself.
    * @param _wallet The target wallet.
    * @param _contract The address of the contract.
     */
    modifier onlyAuthorisedContractCall(address _wallet, address _contract) {
        require(
            _contract != _wallet && // not calling the wallet
            !IWallet(_wallet).authorised(_contract) && // not calling an authorised module
            !versionManager.isFeatureAuthorised(_wallet, _contract), // not calling an authorised feature
            "BT: Forbidden contract"
        );
        _;
    }
    /**
    * @notice Helper method to transfer ETH or ERC20 for a wallet.
    * @param _wallet The target wallet.
    * @param _token The ERC20 address.
    * @param _to The recipient.
    * @param _value The amount of ETH to transfer
    * @param _data The data to *log* with the transfer.
    */
    function doTransfer(address _wallet, address _token, address _to, uint256 _value, bytes memory _data) internal {
        if (_token == ETH_TOKEN) {
            invokeWallet(_wallet, _to, _value, EMPTY_BYTES);
        } else {
            bytes memory methodData = abi.encodeWithSignature("transfer(address,uint256)", _to, _value);
            bytes memory transferSuccessBytes = invokeWallet(_wallet, _token, 0, methodData);
            // Check transfer is successful, when `transfer` returns a success bool result
            if (transferSuccessBytes.length > 0) {
                require(abi.decode(transferSuccessBytes, (bool)), "RM: Transfer failed");
            }
        }
        emit Transfer(_wallet, _token, _value, _to, _data);
    }
    /**
    * @notice Helper method to approve spending the ERC20 of a wallet.
    * @param _wallet The target wallet.
    * @param _token The ERC20 address.
    * @param _spender The spender address.
    * @param _value The amount of token to transfer.
    */
    function doApproveToken(address _wallet, address _token, address _spender, uint256 _value) internal {
        bytes memory methodData = abi.encodeWithSignature("approve(address,uint256)", _spender, _value);
        invokeWallet(_wallet, _token, 0, methodData);
        emit Approved(_wallet, _token, _value, _spender);
    }
    /**
    * @notice Helper method to call an external contract.
    * @param _wallet The target wallet.
    * @param _contract The contract address.
    * @param _value The ETH value to transfer.
    * @param _data The method data.
    */
    function doCallContract(address _wallet, address _contract, uint256 _value, bytes memory _data) internal {
        invokeWallet(_wallet, _contract, _value, _data);
        emit CalledContract(_wallet, _contract, _value, _data);
    }
    /**
    * @notice Helper method to approve a certain amount of token and call an external contract.
    * The address that spends the _token and the address that is called with _data can be different.
    * @param _wallet The target wallet.
    * @param _token The ERC20 address.
    * @param _proxy The address to approve.
    * @param _amount The amount of tokens to transfer.
    * @param _contract The contract address.
    * @param _data The method data.
    */
    function doApproveTokenAndCallContract(
        address _wallet,
        address _token,
        address _proxy,
        uint256 _amount,
        address _contract,
        bytes memory _data
    )
        internal
    {
        // Ensure there is sufficient balance of token before we approve
        uint256 balance = ERC20(_token).balanceOf(_wallet);
        require(balance >= _amount, "BT: insufficient balance");
        uint256 existingAllowance = ERC20(_token).allowance(_wallet, _proxy);
        uint256 totalAllowance = SafeMath.add(existingAllowance, _amount);
        // Approve the desired amount plus existing amount. This logic allows for potential gas saving later
        // when restoring the original approved amount, in cases where the _proxy uses the exact approved _amount.
        bytes memory methodData = abi.encodeWithSignature("approve(address,uint256)", _proxy, totalAllowance);
        invokeWallet(_wallet, _token, 0, methodData);
        invokeWallet(_wallet, _contract, 0, _data);
        // Calculate the approved amount that was spent after the call
        uint256 unusedAllowance = ERC20(_token).allowance(_wallet, _proxy);
        uint256 usedAllowance = SafeMath.sub(totalAllowance, unusedAllowance);
        // Ensure the amount spent does not exceed the amount approved for this call
        require(usedAllowance <= _amount, "BT: insufficient amount for call");
        if (unusedAllowance != existingAllowance) {
            // Restore the original allowance amount if the amount spent was different (can be lower).
            methodData = abi.encodeWithSignature("approve(address,uint256)", _proxy, existingAllowance);
            invokeWallet(_wallet, _token, 0, methodData);
        }
        emit ApprovedAndCalledContract(
            _wallet,
            _contract,
            _proxy,
            _token,
            _amount,
            usedAllowance,
            _data);
    }
    /**
    * @notice Helper method to wrap ETH into WETH, approve a certain amount of WETH and call an external contract.
    * The address that spends the WETH and the address that is called with _data can be different.
    * @param _wallet The target wallet.
    * @param _proxy The address to approves.
    * @param _amount The amount of tokens to transfer.
    * @param _contract The contract address.
    * @param _data The method data.
    */
    function doApproveWethAndCallContract(
        address _wallet,
        address _proxy,
        uint256 _amount,
        address _contract,
        bytes memory _data
    )
        internal
    {
        uint256 wethBalance = ERC20(wethToken).balanceOf(_wallet);
        if (wethBalance < _amount) {
            // Wrap ETH into WETH
            invokeWallet(_wallet, wethToken, _amount - wethBalance, abi.encodeWithSignature("deposit()"));
        }
        doApproveTokenAndCallContract(_wallet, wethToken, _proxy, _amount, _contract, _data);
    }
}
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IFeature
 * @notice Interface for a Feature.
 * @author Julien Niset - <julien@argent.xyz>, Olivier VDB - <olivier@argent.xyz>
 */
interface IFeature {
    enum OwnerSignature {
        Anyone,             // Anyone
        Required,           // Owner required
        Optional,           // Owner and/or guardians
        Disallowed          // guardians only
    }
    /**
    * @notice Utility method to recover any ERC20 token that was sent to the Feature by mistake.
    * @param _token The token to recover.
    */
    function recoverToken(address _token) external;
    /**
     * @notice Inits a Feature for a wallet by e.g. setting some wallet specific parameters in storage.
     * @param _wallet The wallet.
     */
    function init(address _wallet) external;
    /**
     * @notice Helper method to check if an address is an authorised feature of a target wallet.
     * @param _wallet The target wallet.
     * @param _feature The address.
     */
    function isFeatureAuthorisedInVersionManager(address _wallet, address _feature) external view returns (bool);
    /**
    * @notice Gets the number of valid signatures that must be provided to execute a
    * specific relayed transaction.
    * @param _wallet The target wallet.
    * @param _data The data of the relayed transaction.
    * @return The number of required signatures and the wallet owner signature requirement.
    */
    function getRequiredSignatures(address _wallet, bytes calldata _data) external view returns (uint256, OwnerSignature);
    /**
    * @notice Gets the list of static call signatures that this feature responds to on behalf of wallets
    */
    function getStaticCallSignatures() external view returns (bytes4[] memory);
}// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.4 <0.7.0;
pragma experimental ABIEncoderV2;
import "../../infrastructure/storage/ILimitStorage.sol";
/**
 * @title IVersionManager
 * @notice Interface for the VersionManager module.
 * @author Olivier VDB - <olivier@argent.xyz>
 */
interface IVersionManager {
    /**
     * @notice Returns true if the feature is authorised for the wallet
     * @param _wallet The target wallet.
     * @param _feature The feature.
     */
    function isFeatureAuthorised(address _wallet, address _feature) external view returns (bool);
    /**
     * @notice Lets a feature (caller) invoke a wallet.
     * @param _wallet The target wallet.
     * @param _to The target address for the transaction.
     * @param _value The value of the transaction.
     * @param _data The data of the transaction.
     */
    function checkAuthorisedFeatureAndInvokeWallet(
        address _wallet,
        address _to,
        uint256 _value,
        bytes calldata _data
    ) external returns (bytes memory _res);
    /* ******* Backward Compatibility with old Storages and BaseWallet *************** */
    /**
     * @notice Sets a new owner for the wallet.
     * @param _newOwner The new owner.
     */
    function setOwner(address _wallet, address _newOwner) external;
    /**
     * @notice Lets a feature write data to a storage contract.
     * @param _wallet The target wallet.
     * @param _storage The storage contract.
     * @param _data The data of the call
     */
    function invokeStorage(address _wallet, address _storage, bytes calldata _data) external;
    /**
     * @notice Upgrade a wallet to a new version.
     * @param _wallet the wallet to upgrade
     * @param _toVersion the new version
     */
    function upgradeWallet(address _wallet, uint256 _toVersion) external;
 
}// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../infrastructure/storage/ILimitStorage.sol";
import "../../infrastructure/ITokenPriceRegistry.sol";
import "./IVersionManager.sol";
/**
 * @title LimitUtils
 * @notice Helper library to manage the daily limit and interact with a contract implementing the ILimitStorage interface.
 * @author Julien Niset - <julien@argent.xyz>
 */
library LimitUtils {
    // large limit when the limit can be considered disabled
    uint128 constant internal LIMIT_DISABLED = uint128(-1);
    using SafeMath for uint256;
    // *************** Internal Functions ********************* //
    /**
     * @notice Changes the daily limit (expressed in ETH).
     * Decreasing the limit is immediate while increasing the limit is pending for the security period.
     * @param _lStorage The storage contract.
     * @param _versionManager The version manager.
     * @param _wallet The target wallet.
     * @param _targetLimit The target limit.
     * @param _securityPeriod The security period.
     */
    function changeLimit(
        ILimitStorage _lStorage,
        IVersionManager _versionManager,
        address _wallet,
        uint256 _targetLimit,
        uint256 _securityPeriod
    )
        internal
        returns (ILimitStorage.Limit memory)
    {
        ILimitStorage.Limit memory limit = _lStorage.getLimit(_wallet);
        uint256 currentLimit = currentLimit(limit);
        ILimitStorage.Limit memory newLimit;
        if (_targetLimit <= currentLimit) {
            uint128 targetLimit = safe128(_targetLimit);
            newLimit = ILimitStorage.Limit(targetLimit, targetLimit, safe64(block.timestamp));
        } else {
            newLimit = ILimitStorage.Limit(safe128(currentLimit), safe128(_targetLimit), safe64(block.timestamp.add(_securityPeriod)));
        }
        setLimit(_versionManager, _lStorage, _wallet, newLimit);
        return newLimit;
    }
     /**
     * @notice Disable the daily limit.
     * The change is pending for the security period.
     * @param _lStorage The storage contract.
     * @param _versionManager The version manager.
     * @param _wallet The target wallet.
     * @param _securityPeriod The security period.
     */
    function disableLimit(
        ILimitStorage _lStorage,
        IVersionManager _versionManager,
        address _wallet,
        uint256 _securityPeriod
    )
        internal
    {
        changeLimit(_lStorage, _versionManager, _wallet, LIMIT_DISABLED, _securityPeriod);
    }
    /**
    * @notice Returns whether the daily limit is disabled for a wallet.
    * @param _wallet The target wallet.
    * @return _limitDisabled true if the daily limit is disabled, false otherwise.
    */
    function isLimitDisabled(ILimitStorage _lStorage, address _wallet) internal view returns (bool) {
        ILimitStorage.Limit memory limit = _lStorage.getLimit(_wallet);
        uint256 currentLimit = currentLimit(limit);
        return (currentLimit == LIMIT_DISABLED);
    }
    /**
    * @notice Checks if a transfer is within the limit. If yes the daily spent is updated.
    * @param _lStorage The storage contract.
    * @param _versionManager The Version Manager.
    * @param _wallet The target wallet.
    * @param _amount The amount for the transfer
    * @return true if the transfer is withing the daily limit.
    */
    function checkAndUpdateDailySpent(
        ILimitStorage _lStorage,
        IVersionManager _versionManager,
        address _wallet,
        uint256 _amount
    )
        internal
        returns (bool)
    {
        (ILimitStorage.Limit memory limit, ILimitStorage.DailySpent memory dailySpent) = _lStorage.getLimitAndDailySpent(_wallet);
        uint256 currentLimit = currentLimit(limit);
        if (_amount == 0 || currentLimit == LIMIT_DISABLED) {
            return true;
        }
        ILimitStorage.DailySpent memory newDailySpent;
        if (dailySpent.periodEnd <= block.timestamp && _amount <= currentLimit) {
            newDailySpent = ILimitStorage.DailySpent(safe128(_amount), safe64(block.timestamp + 24 hours));
            setDailySpent(_versionManager, _lStorage, _wallet, newDailySpent);
            return true;
        } else if (dailySpent.periodEnd > block.timestamp && _amount.add(dailySpent.alreadySpent) <= currentLimit) {
            newDailySpent = ILimitStorage.DailySpent(safe128(_amount.add(dailySpent.alreadySpent)), safe64(dailySpent.periodEnd));
            setDailySpent(_versionManager, _lStorage, _wallet, newDailySpent);
            return true;
        }
        return false;
    }
    /**
    * @notice Helper method to Reset the daily consumption.
    * @param _versionManager The Version Manager.
    * @param _wallet The target wallet.
    */
    function resetDailySpent(IVersionManager _versionManager, ILimitStorage limitStorage, address _wallet) internal {
        setDailySpent(_versionManager, limitStorage, _wallet, ILimitStorage.DailySpent(uint128(0), uint64(0)));
    }
    /**
    * @notice Helper method to get the ether value equivalent of a token amount.
    * @notice For low value amounts of tokens we accept this to return zero as these are small enough to disregard.
    * Note that the price stored for tokens = price for 1 token (in ETH wei) * 10^(18-token decimals).
    * @param _amount The token amount.
    * @param _token The address of the token.
    * @return The ether value for _amount of _token.
    */
    function getEtherValue(ITokenPriceRegistry _priceRegistry, uint256 _amount, address _token) internal view returns (uint256) {
        uint256 price = _priceRegistry.getTokenPrice(_token);
        uint256 etherValue = price.mul(_amount).div(10**18);
        return etherValue;
    }
    /**
    * @notice Helper method to get the current limit from a Limit struct.
    * @param _limit The limit struct
    */
    function currentLimit(ILimitStorage.Limit memory _limit) internal view returns (uint256) {
        if (_limit.changeAfter > 0 && _limit.changeAfter < block.timestamp) {
            return _limit.pending;
        }
        return _limit.current;
    }
    function safe128(uint256 _num) internal pure returns (uint128) {
        require(_num < 2**128, "LU: more then 128 bits");
        return uint128(_num);
    }
    function safe64(uint256 _num) internal pure returns (uint64) {
        require(_num < 2**64, "LU: more then 64 bits");
        return uint64(_num);
    }
    // *************** Storage invocations in VersionManager ********************* //
    function setLimit(
        IVersionManager _versionManager,
        ILimitStorage _lStorage,
        address _wallet, 
        ILimitStorage.Limit memory _limit
    ) internal {
        _versionManager.invokeStorage(
            _wallet,
            address(_lStorage),
            abi.encodeWithSelector(_lStorage.setLimit.selector, _wallet, _limit)
        );
    }
    function setDailySpent(
        IVersionManager _versionManager,
        ILimitStorage _lStorage,
        address _wallet, 
        ILimitStorage.DailySpent memory _dailySpent
    ) private {
        _versionManager.invokeStorage(
            _wallet,
            address(_lStorage),
            abi.encodeWithSelector(_lStorage.setDailySpent.selector, _wallet, _dailySpent)
        );
    }
}// Copyright (C) 2020  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity ^0.6.12;
/**
 * @title Utils
 * @notice Common utility methods used by modules.
 */
library Utils {
    /**
    * @notice Helper method to recover the signer at a given position from a list of concatenated signatures.
    * @param _signedHash The signed hash
    * @param _signatures The concatenated signatures.
    * @param _index The index of the signature to recover.
    */
    function recoverSigner(bytes32 _signedHash, bytes memory _signatures, uint _index) internal pure returns (address) {
        uint8 v;
        bytes32 r;
        bytes32 s;
        // we jump 32 (0x20) as the first slot of bytes contains the length
        // we jump 65 (0x41) per signature
        // for v we load 32 bytes ending with v (the first 31 come from s) then apply a mask
        // solhint-disable-next-line no-inline-assembly
        assembly {
            r := mload(add(_signatures, add(0x20,mul(0x41,_index))))
            s := mload(add(_signatures, add(0x40,mul(0x41,_index))))
            v := and(mload(add(_signatures, add(0x41,mul(0x41,_index)))), 0xff)
        }
        require(v == 27 || v == 28);
        address recoveredAddress = ecrecover(_signedHash, v, r, s);
        require(recoveredAddress != address(0), "Utils: ecrecover returned 0");
        return recoveredAddress;
    }
    /**
    * @notice Helper method to parse data and extract the method signature.
    */
    function functionPrefix(bytes memory _data) internal pure returns (bytes4 prefix) {
        require(_data.length >= 4, "RM: Invalid functionPrefix");
        // solhint-disable-next-line no-inline-assembly
        assembly {
            prefix := mload(add(_data, 0x20))
        }
    }
    /**
    * @notice Returns ceil(a / b).
    */
    function ceil(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a / b;
        if (a % b == 0) {
            return c;
        } else {
            return c + 1;
        }
    }
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a < b) {
            return a;
        }
        return b;
    }
}
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IWallet
 * @notice Interface for the BaseWallet
 */
interface IWallet {
    /**
     * @notice Returns the wallet owner.
     * @return The wallet owner address.
     */
    function owner() external view returns (address);
    /**
     * @notice Returns the number of authorised modules.
     * @return The number of authorised modules.
     */
    function modules() external view returns (uint);
    /**
     * @notice Sets a new owner for the wallet.
     * @param _newOwner The new owner.
     */
    function setOwner(address _newOwner) external;
    /**
     * @notice Checks if a module is authorised on the wallet.
     * @param _module The module address to check.
     * @return `true` if the module is authorised, otherwise `false`.
     */
    function authorised(address _module) external view returns (bool);
    /**
     * @notice Returns the module responsible for a static call redirection.
     * @param _sig The signature of the static call.
     * @return the module doing the redirection
     */
    function enabled(bytes4 _sig) external view returns (address);
    /**
     * @notice Enables/Disables a module.
     * @param _module The target module.
     * @param _value Set to `true` to authorise the module.
     */
    function authoriseModule(address _module, bool _value) external;
    /**
    * @notice Enables a static method by specifying the target module to which the call must be delegated.
    * @param _module The target module.
    * @param _method The static method signature.
    */
    function enableStaticCall(address _module, bytes4 _method) external;
}pragma solidity >=0.5.4 <0.7.0;
/**
 * ERC20 contract interface.
 */
interface ERC20 {
    function totalSupply() external view returns (uint);
    function decimals() external view returns (uint);
    function balanceOf(address tokenOwner) external view returns (uint balance);
    function allowance(address tokenOwner, address spender) external view returns (uint remaining);
    function transfer(address to, uint tokens) external returns (bool success);
    function approve(address spender, uint tokens) external returns (bool success);
    function transferFrom(address from, address to, uint tokens) external returns (bool success);
}pragma solidity ^0.6.0;
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }
    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return c;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.5.4;

/**
 * @title Proxy
 * @dev Basic proxy that delegates all calls to a fixed implementing contract.
 * The implementing contract cannot be upgraded.
 * @author Julien Niset - <julien@argent.xyz>
 */
contract Proxy {

    address implementation;

    event Received(uint indexed value, address indexed sender, bytes data);

    constructor(address _implementation) public {
        implementation = _implementation;
    }

    function() external payable {

        if (msg.data.length == 0 && msg.value > 0) {
            emit Received(msg.value, msg.sender, msg.data);
        } else {
            // solium-disable-next-line security/no-inline-assembly
            assembly {
                let target := sload(0)
                calldatacopy(0, 0, calldatasize())
                let result := delegatecall(gas, target, 0, calldatasize(), 0, 0)
                returndatacopy(0, 0, returndatasize())
                switch result
                case 0 {revert(0, returndatasize())}
                default {return (0, returndatasize())}
            }
        }
    }
}

pragma experimental ABIEncoderV2;
// File: contracts/modules/common/Utils.sol
// Copyright (C) 2020  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
// SPDX-License-Identifier: GPL-3.0-only
/**
 * @title Utils
 * @notice Common utility methods used by modules.
 */
library Utils {
    /**
    * @notice Helper method to recover the signer at a given position from a list of concatenated signatures.
    * @param _signedHash The signed hash
    * @param _signatures The concatenated signatures.
    * @param _index The index of the signature to recover.
    */
    function recoverSigner(bytes32 _signedHash, bytes memory _signatures, uint _index) internal pure returns (address) {
        uint8 v;
        bytes32 r;
        bytes32 s;
        // we jump 32 (0x20) as the first slot of bytes contains the length
        // we jump 65 (0x41) per signature
        // for v we load 32 bytes ending with v (the first 31 come from s) then apply a mask
        // solhint-disable-next-line no-inline-assembly
        assembly {
            r := mload(add(_signatures, add(0x20,mul(0x41,_index))))
            s := mload(add(_signatures, add(0x40,mul(0x41,_index))))
            v := and(mload(add(_signatures, add(0x41,mul(0x41,_index)))), 0xff)
        }
        require(v == 27 || v == 28);
        address recoveredAddress = ecrecover(_signedHash, v, r, s);
        require(recoveredAddress != address(0), "Utils: ecrecover returned 0");
        return recoveredAddress;
    }
    /**
    * @notice Helper method to parse data and extract the method signature.
    */
    function functionPrefix(bytes memory _data) internal pure returns (bytes4 prefix) {
        require(_data.length >= 4, "RM: Invalid functionPrefix");
        // solhint-disable-next-line no-inline-assembly
        assembly {
            prefix := mload(add(_data, 0x20))
        }
    }
    /**
    * @notice Returns ceil(a / b).
    */
    function ceil(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a / b;
        if (a % b == 0) {
            return c;
        } else {
            return c + 1;
        }
    }
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a < b) {
            return a;
        }
        return b;
    }
}
// File: contracts/infrastructure/base/Owned.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title Owned
 * @notice Basic contract to define an owner.
 * @author Julien Niset - <julien@argent.xyz>
 */
contract Owned {
    // The owner
    address public owner;
    event OwnerChanged(address indexed _newOwner);
    /**
     * @notice Throws if the sender is not the owner.
     */
    modifier onlyOwner {
        require(msg.sender == owner, "Must be owner");
        _;
    }
    constructor() public {
        owner = msg.sender;
    }
    /**
     * @notice Lets the owner transfer ownership of the contract to a new owner.
     * @param _newOwner The new owner.
     */
    function changeOwner(address _newOwner) external onlyOwner {
        require(_newOwner != address(0), "Address must not be null");
        owner = _newOwner;
        emit OwnerChanged(_newOwner);
    }
}
// File: contracts/infrastructure/storage/ITransferStorage.sol
// Copyright (C) 2020  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title ITransferStorage
 * @notice TransferStorage interface
 */
interface ITransferStorage {
    function setWhitelist(address _wallet, address _target, uint256 _value) external;
    function getWhitelist(address _wallet, address _target) external view returns (uint256);
}
// File: contracts/infrastructure/storage/IGuardianStorage.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
interface IGuardianStorage {
    /**
     * @notice Lets an authorised module add a guardian to a wallet.
     * @param _wallet The target wallet.
     * @param _guardian The guardian to add.
     */
    function addGuardian(address _wallet, address _guardian) external;
    /**
     * @notice Lets an authorised module revoke a guardian from a wallet.
     * @param _wallet The target wallet.
     * @param _guardian The guardian to revoke.
     */
    function revokeGuardian(address _wallet, address _guardian) external;
    /**
     * @notice Checks if an account is a guardian for a wallet.
     * @param _wallet The target wallet.
     * @param _guardian The account.
     * @return true if the account is a guardian for a wallet.
     */
    function isGuardian(address _wallet, address _guardian) external view returns (bool);
    function isLocked(address _wallet) external view returns (bool);
    function getLock(address _wallet) external view returns (uint256);
    function getLocker(address _wallet) external view returns (address);
    function setLock(address _wallet, uint256 _releaseAfter) external;
    function getGuardians(address _wallet) external view returns (address[] memory);
    function guardianCount(address _wallet) external view returns (uint256);
}
// File: contracts/modules/common/IModule.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IModule
 * @notice Interface for a module.
 * A module MUST implement the addModule() method to ensure that a wallet with at least one module
 * can never end up in a "frozen" state.
 * @author Julien Niset - <julien@argent.xyz>
 */
interface IModule {
    /**
     * @notice Inits a module for a wallet by e.g. setting some wallet specific parameters in storage.
     * @param _wallet The wallet.
     */
    function init(address _wallet) external;
    /**	
     * @notice Adds a module to a wallet. Cannot execute when wallet is locked (or under recovery)	
     * @param _wallet The target wallet.	
     * @param _module The modules to authorise.	
     */	
    function addModule(address _wallet, address _module) external;
}
// File: @openzeppelin/contracts/math/SafeMath.sol
/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }
    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }
    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return c;
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }
    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}
// File: contracts/wallet/IWallet.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IWallet
 * @notice Interface for the BaseWallet
 */
interface IWallet {
    /**
     * @notice Returns the wallet owner.
     * @return The wallet owner address.
     */
    function owner() external view returns (address);
    /**
     * @notice Returns the number of authorised modules.
     * @return The number of authorised modules.
     */
    function modules() external view returns (uint);
    /**
     * @notice Sets a new owner for the wallet.
     * @param _newOwner The new owner.
     */
    function setOwner(address _newOwner) external;
    /**
     * @notice Checks if a module is authorised on the wallet.
     * @param _module The module address to check.
     * @return `true` if the module is authorised, otherwise `false`.
     */
    function authorised(address _module) external view returns (bool);
    /**
     * @notice Returns the module responsible for a static call redirection.
     * @param _sig The signature of the static call.
     * @return the module doing the redirection
     */
    function enabled(bytes4 _sig) external view returns (address);
    /**
     * @notice Enables/Disables a module.
     * @param _module The target module.
     * @param _value Set to `true` to authorise the module.
     */
    function authoriseModule(address _module, bool _value) external;
    /**
    * @notice Enables a static method by specifying the target module to which the call must be delegated.
    * @param _module The target module.
    * @param _method The static method signature.
    */
    function enableStaticCall(address _module, bytes4 _method) external;
}
// File: contracts/infrastructure/IModuleRegistry.sol
// Copyright (C) 2020  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IModuleRegistry
 * @notice Interface for the registry of authorised modules.
 */
interface IModuleRegistry {
    function registerModule(address _module, bytes32 _name) external;
    function deregisterModule(address _module) external;
    function registerUpgrader(address _upgrader, bytes32 _name) external;
    function deregisterUpgrader(address _upgrader) external;
    function recoverToken(address _token) external;
    function moduleInfo(address _module) external view returns (bytes32);
    function upgraderInfo(address _upgrader) external view returns (bytes32);
    function isRegisteredModule(address _module) external view returns (bool);
    function isRegisteredModule(address[] calldata _modules) external view returns (bool);
    function isRegisteredUpgrader(address _upgrader) external view returns (bool);
}
// File: contracts/infrastructure/storage/ILockStorage.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
interface ILockStorage {
    function isLocked(address _wallet) external view returns (bool);
    function getLock(address _wallet) external view returns (uint256);
    function getLocker(address _wallet) external view returns (address);
    function setLock(address _wallet, address _locker, uint256 _releaseAfter) external;
}
// File: contracts/modules/common/IFeature.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IFeature
 * @notice Interface for a Feature.
 * @author Julien Niset - <julien@argent.xyz>, Olivier VDB - <olivier@argent.xyz>
 */
interface IFeature {
    enum OwnerSignature {
        Anyone,             // Anyone
        Required,           // Owner required
        Optional,           // Owner and/or guardians
        Disallowed          // guardians only
    }
    /**
    * @notice Utility method to recover any ERC20 token that was sent to the Feature by mistake.
    * @param _token The token to recover.
    */
    function recoverToken(address _token) external;
    /**
     * @notice Inits a Feature for a wallet by e.g. setting some wallet specific parameters in storage.
     * @param _wallet The wallet.
     */
    function init(address _wallet) external;
    /**
     * @notice Helper method to check if an address is an authorised feature of a target wallet.
     * @param _wallet The target wallet.
     * @param _feature The address.
     */
    function isFeatureAuthorisedInVersionManager(address _wallet, address _feature) external view returns (bool);
    /**
    * @notice Gets the number of valid signatures that must be provided to execute a
    * specific relayed transaction.
    * @param _wallet The target wallet.
    * @param _data The data of the relayed transaction.
    * @return The number of required signatures and the wallet owner signature requirement.
    */
    function getRequiredSignatures(address _wallet, bytes calldata _data) external view returns (uint256, OwnerSignature);
    /**
    * @notice Gets the list of static call signatures that this feature responds to on behalf of wallets
    */
    function getStaticCallSignatures() external view returns (bytes4[] memory);
}
// File: lib/other/ERC20.sol
pragma solidity >=0.5.4 <0.7.0;
/**
 * ERC20 contract interface.
 */
interface ERC20 {
    function totalSupply() external view returns (uint);
    function decimals() external view returns (uint);
    function balanceOf(address tokenOwner) external view returns (uint balance);
    function allowance(address tokenOwner, address spender) external view returns (uint remaining);
    function transfer(address to, uint tokens) external returns (bool success);
    function approve(address spender, uint tokens) external returns (bool success);
    function transferFrom(address from, address to, uint tokens) external returns (bool success);
}
// File: contracts/infrastructure/storage/ILimitStorage.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
/**
 * @title ILimitStorage
 * @notice LimitStorage interface
 */
interface ILimitStorage {
    struct Limit {
        // the current limit
        uint128 current;
        // the pending limit if any
        uint128 pending;
        // when the pending limit becomes the current limit
        uint64 changeAfter;
    }
    struct DailySpent {
        // The amount already spent during the current period
        uint128 alreadySpent;
        // The end of the current period
        uint64 periodEnd;
    }
    function setLimit(address _wallet, Limit memory _limit) external;
    function getLimit(address _wallet) external view returns (Limit memory _limit);
    function setDailySpent(address _wallet, DailySpent memory _dailySpent) external;
    function getDailySpent(address _wallet) external view returns (DailySpent memory _dailySpent);
    function setLimitAndDailySpent(address _wallet, Limit memory _limit, DailySpent memory _dailySpent) external;
    function getLimitAndDailySpent(address _wallet) external view returns (Limit memory _limit, DailySpent memory _dailySpent);
}
// File: contracts/modules/common/IVersionManager.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
pragma solidity >=0.5.4 <0.7.0;
/**
 * @title IVersionManager
 * @notice Interface for the VersionManager module.
 * @author Olivier VDB - <olivier@argent.xyz>
 */
interface IVersionManager {
    /**
     * @notice Returns true if the feature is authorised for the wallet
     * @param _wallet The target wallet.
     * @param _feature The feature.
     */
    function isFeatureAuthorised(address _wallet, address _feature) external view returns (bool);
    /**
     * @notice Lets a feature (caller) invoke a wallet.
     * @param _wallet The target wallet.
     * @param _to The target address for the transaction.
     * @param _value The value of the transaction.
     * @param _data The data of the transaction.
     */
    function checkAuthorisedFeatureAndInvokeWallet(
        address _wallet,
        address _to,
        uint256 _value,
        bytes calldata _data
    ) external returns (bytes memory _res);
    /* ******* Backward Compatibility with old Storages and BaseWallet *************** */
    /**
     * @notice Sets a new owner for the wallet.
     * @param _newOwner The new owner.
     */
    function setOwner(address _wallet, address _newOwner) external;
    /**
     * @notice Lets a feature write data to a storage contract.
     * @param _wallet The target wallet.
     * @param _storage The storage contract.
     * @param _data The data of the call
     */
    function invokeStorage(address _wallet, address _storage, bytes calldata _data) external;
    /**
     * @notice Upgrade a wallet to a new version.
     * @param _wallet the wallet to upgrade
     * @param _toVersion the new version
     */
    function upgradeWallet(address _wallet, uint256 _toVersion) external;
}
// File: contracts/modules/common/BaseFeature.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.s
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
/**
 * @title BaseFeature
 * @notice Base Feature contract that contains methods common to all Feature contracts.
 * @author Julien Niset - <julien@argent.xyz>, Olivier VDB - <olivier@argent.xyz>
 */
contract BaseFeature is IFeature {
    // Empty calldata
    bytes constant internal EMPTY_BYTES = "";
    // Mock token address for ETH
    address constant internal ETH_TOKEN = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
    // The address of the Lock storage
    ILockStorage internal lockStorage;
    // The address of the Version Manager
    IVersionManager internal versionManager;
    event FeatureCreated(bytes32 name);
    /**
     * @notice Throws if the wallet is locked.
     */
    modifier onlyWhenUnlocked(address _wallet) {
        require(!lockStorage.isLocked(_wallet), "BF: wallet locked");
        _;
    }
    /**
     * @notice Throws if the sender is not the VersionManager.
     */
    modifier onlyVersionManager() {
        require(msg.sender == address(versionManager), "BF: caller must be VersionManager");
        _;
    }
    /**
     * @notice Throws if the sender is not the owner of the target wallet.
     */
    modifier onlyWalletOwner(address _wallet) {
        require(isOwner(_wallet, msg.sender), "BF: must be wallet owner");
        _;
    }
    /**
     * @notice Throws if the sender is not an authorised feature of the target wallet.
     */
    modifier onlyWalletFeature(address _wallet) {
        require(versionManager.isFeatureAuthorised(_wallet, msg.sender), "BF: must be a wallet feature");
        _;
    }
    /**
     * @notice Throws if the sender is not the owner of the target wallet or the feature itself.
     */
    modifier onlyWalletOwnerOrFeature(address _wallet) {
        // Wrapping in an internal method reduces deployment cost by avoiding duplication of inlined code
        verifyOwnerOrAuthorisedFeature(_wallet, msg.sender);
        _;
    }
    constructor(
        ILockStorage _lockStorage,
        IVersionManager _versionManager,
        bytes32 _name
    ) public {
        lockStorage = _lockStorage;
        versionManager = _versionManager;
        emit FeatureCreated(_name);
    }
    /**
    * @inheritdoc IFeature
    */
    function recoverToken(address _token) external virtual override {
        uint total = ERC20(_token).balanceOf(address(this));
        _token.call(abi.encodeWithSelector(ERC20(_token).transfer.selector, address(versionManager), total));
    }
    /**
     * @notice Inits the feature for a wallet by doing nothing.
     * @dev !! Overriding methods need make sure `init()` can only be called by the VersionManager !!
     * @param _wallet The wallet.
     */
    function init(address _wallet) external virtual override  {}
    /**
     * @inheritdoc IFeature
     */
    function getRequiredSignatures(address, bytes calldata) external virtual view override returns (uint256, OwnerSignature) {
        revert("BF: disabled method");
    }
    /**
     * @inheritdoc IFeature
     */
    function getStaticCallSignatures() external virtual override view returns (bytes4[] memory _sigs) {}
    /**
     * @inheritdoc IFeature
     */
    function isFeatureAuthorisedInVersionManager(address _wallet, address _feature) public override view returns (bool) {
        return versionManager.isFeatureAuthorised(_wallet, _feature);
    }
    /**
    * @notice Checks that the wallet address provided as the first parameter of _data matches _wallet
    * @return false if the addresses are different.
    */
    function verifyData(address _wallet, bytes calldata _data) internal pure returns (bool) {
        require(_data.length >= 36, "RM: Invalid dataWallet");
        address dataWallet = abi.decode(_data[4:], (address));
        return dataWallet == _wallet;
    }
     /**
     * @notice Helper method to check if an address is the owner of a target wallet.
     * @param _wallet The target wallet.
     * @param _addr The address.
     */
    function isOwner(address _wallet, address _addr) internal view returns (bool) {
        return IWallet(_wallet).owner() == _addr;
    }
    /**
     * @notice Verify that the caller is an authorised feature or the wallet owner.
     * @param _wallet The target wallet.
     * @param _sender The caller.
     */
    function verifyOwnerOrAuthorisedFeature(address _wallet, address _sender) internal view {
        require(isFeatureAuthorisedInVersionManager(_wallet, _sender) || isOwner(_wallet, _sender), "BF: must be owner or feature");
    }
    /**
     * @notice Helper method to invoke a wallet.
     * @param _wallet The target wallet.
     * @param _to The target address for the transaction.
     * @param _value The value of the transaction.
     * @param _data The data of the transaction.
     */
    function invokeWallet(address _wallet, address _to, uint256 _value, bytes memory _data)
        internal
        returns (bytes memory _res) 
    {
        _res = versionManager.checkAuthorisedFeatureAndInvokeWallet(_wallet, _to, _value, _data);
    }
}
// File: modules/VersionManager.sol
// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
/**
 * @title VersionManager
 * @notice Intermediate contract between features and wallets. VersionManager checks that a calling feature is
 * authorised for the wallet and if so, forwards the call to it. Note that VersionManager is meant to be the only
 * module authorised on a wallet and because some of its methods need to be called by the RelayerManager feature,
 * the VersionManager is both a module AND a feature.
 * @author Olivier VDB <olivier@argent.xyz>
 */
contract VersionManager is IVersionManager, IModule, BaseFeature, Owned {
    bytes32 constant NAME = "VersionManager";
    bytes4 constant internal ADD_MODULE_PREFIX = bytes4(keccak256("addModule(address,address)"));
    bytes4 constant internal UPGRADE_WALLET_PREFIX = bytes4(keccak256("upgradeWallet(address,uint256)"));
    // Last bundle version
    uint256 public lastVersion;
    // Minimum allowed version
    uint256 public minVersion = 1;
    // Current bundle version for a wallet
    mapping(address => uint256) public walletVersions; // [wallet] => [version]
    // Features per version
    mapping(address => mapping(uint256 => bool)) public isFeatureInVersion; // [feature][version] => bool
    // Features requiring initialization for a wallet
    mapping(uint256 => address[]) public featuresToInit; // [version] => [features]
    // Supported static call signatures
    mapping(uint256 => bytes4[]) public staticCallSignatures; // [version] => [sigs]
    // Features executing static calls
    mapping(uint256 => mapping(bytes4 => address)) public staticCallExecutors; // [version][sig] => [feature]
    // Authorised Storages
    mapping(address => bool) public isStorage; // [storage] => bool
    event VersionAdded(uint256 _version, address[] _features);
    event WalletUpgraded(address indexed _wallet, uint256 _version);
    // The Module Registry
    IModuleRegistry private registry;
    /* ***************** Constructor ************************* */
    constructor(
        IModuleRegistry _registry,
        ILockStorage _lockStorage,
        IGuardianStorage _guardianStorage,
        ITransferStorage _transferStorage,
        ILimitStorage _limitStorage
    )
        BaseFeature(_lockStorage, IVersionManager(address(this)), NAME)
        public
    {
        registry = _registry;
        // Add initial storages
        if(address(_lockStorage) != address(0)) { 
            addStorage(address(_lockStorage));
        }
        if(address(_guardianStorage) != address(0)) { 
            addStorage(address(_guardianStorage));
        }
        if(address(_transferStorage) != address(0)) {
            addStorage(address(_transferStorage));
        }
        if(address(_limitStorage) != address(0)) {
            addStorage(address(_limitStorage));
        }
    }
    /* ***************** onlyOwner ************************* */
    /**
     * @inheritdoc IFeature
     */
    function recoverToken(address _token) external override onlyOwner {
        uint total = ERC20(_token).balanceOf(address(this));
        _token.call(abi.encodeWithSelector(ERC20(_token).transfer.selector, msg.sender, total));
    }
    /**
     * @notice Lets the owner change the minimum allowed version
     * @param _minVersion the minimum allowed version
     */
    function setMinVersion(uint256 _minVersion) external onlyOwner {
        require(_minVersion > 0 && _minVersion <= lastVersion, "VM: invalid _minVersion");
        minVersion = _minVersion;
    }
    /**
     * @notice Lets the owner add a new version, i.e. a new bundle of features.
     * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     * WARNING: if a feature was added to a version and later on removed from a subsequent version,
     * the feature may no longer be used in any future version without first being redeployed.
     * Otherwise, the feature could be initialized more than once.
     * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     * @param _features the list of features included in the new version
     * @param _featuresToInit the subset of features that need to be initialized for a wallet
     */
    function addVersion(address[] calldata _features, address[] calldata _featuresToInit) external onlyOwner {
        uint256 newVersion = ++lastVersion;
        for(uint256 i = 0; i < _features.length; i++) {
            isFeatureInVersion[_features[i]][newVersion] = true;
            // Store static call information to optimise its use by wallets
            bytes4[] memory sigs = IFeature(_features[i]).getStaticCallSignatures();
            for(uint256 j = 0; j < sigs.length; j++) {
                staticCallSignatures[newVersion].push(sigs[j]);
                staticCallExecutors[newVersion][sigs[j]] = _features[i];
            }
        }
        // Sanity check
        for(uint256 i = 0; i < _featuresToInit.length; i++) {
            require(isFeatureInVersion[_featuresToInit[i]][newVersion], "VM: invalid _featuresToInit");
        }
        featuresToInit[newVersion] = _featuresToInit;
        emit VersionAdded(newVersion, _features);
    }
    /**
     * @notice Lets the owner add a storage contract
     * @param _storage the storage contract to add
     */
    function addStorage(address _storage) public onlyOwner {
        require(!isStorage[_storage], "VM: storage already added");
        isStorage[_storage] = true;
    }
    /* ***************** View Methods ************************* */
    /**
     * @inheritdoc IVersionManager
     */
    function isFeatureAuthorised(address _wallet, address _feature) external view override returns (bool) {
        // Note that the VersionManager is the only feature that isn't stored in isFeatureInVersion
        return _isFeatureAuthorisedForWallet(_wallet, _feature) || _feature == address(this);
    }
    /**
     * @inheritdoc IFeature
     */
    function getRequiredSignatures(address /* _wallet */, bytes calldata _data) external view override returns (uint256, OwnerSignature) {
        bytes4 methodId = Utils.functionPrefix(_data);
        // This require ensures that the RelayerManager cannot be used to call a featureOnly VersionManager method
        // that calls a Storage or the BaseWallet for backward-compatibility reason
        require(methodId == UPGRADE_WALLET_PREFIX || methodId == ADD_MODULE_PREFIX, "VM: unknown method");     
        return (1, OwnerSignature.Required);
    }
    /* ***************** Static Call Delegation ************************* */
    /**
     * @notice This method is used by the VersionManager's fallback (via an internal call) to determine whether
     * the current transaction is a staticcall or not. The method succeeds if the current transaction is a static call, 
     * and reverts otherwise. 
     * @dev The use of an if/else allows to encapsulate the whole logic in a single function.
     */
    function verifyStaticCall() public {
        if(msg.sender != address(this)) { // first entry in the method (via an internal call)
            (bool success,) = address(this).call{gas: 3000}(abi.encodeWithSelector(VersionManager(0).verifyStaticCall.selector));
            require(!success, "VM: not in a staticcall");
        } else { // second entry in the method (via an external call)
            // solhint-disable-next-line no-inline-assembly
            assembly { log0(0, 0) }
        }
    }
    /**
     * @notice This method delegates the static call to a target feature
     */
    fallback() external {
        uint256 version = walletVersions[msg.sender];
        address feature = staticCallExecutors[version][msg.sig];
        require(feature != address(0), "VM: static call not supported for wallet version");
        verifyStaticCall();
        // solhint-disable-next-line no-inline-assembly
        assembly {
            calldatacopy(0, 0, calldatasize())
            let result := delegatecall(gas(), feature, 0, calldatasize(), 0, 0)
            returndatacopy(0, 0, returndatasize())
            switch result
            case 0 {revert(0, returndatasize())}
            default {return (0, returndatasize())}
        }
    }
    /* ***************** Wallet Upgrade ************************* */
    /**
     * @inheritdoc IFeature
     */
    function init(address _wallet) public override(IModule, BaseFeature) {}
    /**
     * @inheritdoc IVersionManager
     */
    function upgradeWallet(address _wallet, uint256 _toVersion) external override onlyWhenUnlocked(_wallet) {
        require(
            // Upgrade triggered by the RelayerManager (from version v>=1 to version v'>v)
            _isFeatureAuthorisedForWallet(_wallet, msg.sender) ||
            // Upgrade triggered by WalletFactory or UpgraderToVersionManager (from version v=0 to version v'>0)
            IWallet(_wallet).authorised(msg.sender) ||
            // Upgrade triggered directly by the owner (from version v>=1 to version v'>v)
            isOwner(_wallet, msg.sender), 
            "VM: sender may not upgrade wallet"
        );
        uint256 fromVersion = walletVersions[_wallet];
        uint256 minVersion_ = minVersion;
        uint256 toVersion;
        if(_toVersion < minVersion_ && fromVersion == 0 && IWallet(_wallet).modules() == 2) {
            // When the caller is the WalletFactory, we automatically change toVersion to minVersion if needed.
            // Note that when fromVersion == 0, the caller could be the WalletFactory or the UpgraderToVersionManager. 
            // The WalletFactory will be the only possible caller when the wallet has only 2 authorised modules 
            // (that number would be >= 3 for a call from the UpgraderToVersionManager)
            toVersion = minVersion_;
        } else {
            toVersion = _toVersion;
        }
        require(toVersion >= minVersion_ && toVersion <= lastVersion, "VM: invalid _toVersion");
        require(fromVersion < toVersion, "VM: already on new version");
        walletVersions[_wallet] = toVersion;
        // Setup static call redirection
        bytes4[] storage sigs = staticCallSignatures[toVersion];
        for(uint256 i = 0; i < sigs.length; i++) {
            bytes4 sig = sigs[i];
            if(IWallet(_wallet).enabled(sig) != address(this)) {
                IWallet(_wallet).enableStaticCall(address(this), sig);
            }
        }
        // Init features
        address[] storage featuresToInitInToVersion = featuresToInit[toVersion];
        for(uint256 i = 0; i < featuresToInitInToVersion.length; i++) {
            address feature = featuresToInitInToVersion[i];
            // We only initialize a feature that was not already initialized in the previous version
            if(fromVersion == 0 || !isFeatureInVersion[feature][fromVersion]) {
                IFeature(feature).init(_wallet);
            }
        }
        emit WalletUpgraded(_wallet, toVersion);
    }
    /**
     * @inheritdoc IModule
     */
    function addModule(address _wallet, address _module) external override onlyWalletOwnerOrFeature(_wallet) onlyWhenUnlocked(_wallet) {
        require(registry.isRegisteredModule(_module), "VM: module is not registered");
        IWallet(_wallet).authoriseModule(_module, true);
    }
    /* ******* Backward Compatibility with old Storages and BaseWallet *************** */
    /**
     * @inheritdoc IVersionManager
     */
    function checkAuthorisedFeatureAndInvokeWallet(
        address _wallet, 
        address _to, 
        uint256 _value, 
        bytes memory _data
    ) 
        external 
        override
        returns (bytes memory _res) 
    {
        require(_isFeatureAuthorisedForWallet(_wallet, msg.sender), "VM: sender may not invoke wallet");
        bool success;
        (success, _res) = _wallet.call(abi.encodeWithSignature("invoke(address,uint256,bytes)", _to, _value, _data));
        if (success && _res.length > 0) { //_res is empty if _wallet is an "old" BaseWallet that can't return output values
            (_res) = abi.decode(_res, (bytes));
        } else if (_res.length > 0) {
            // solhint-disable-next-line no-inline-assembly
            assembly {
                returndatacopy(0, 0, returndatasize())
                revert(0, returndatasize())
            }
        } else if (!success) {
            revert("VM: wallet invoke reverted");
        }
    }
    /**
     * @inheritdoc IVersionManager
     */
    function invokeStorage(address _wallet, address _storage, bytes calldata _data) external override {
        require(_isFeatureAuthorisedForWallet(_wallet, msg.sender), "VM: sender may not invoke storage");
        require(verifyData(_wallet, _data), "VM: target of _data != _wallet");
        require(isStorage[_storage], "VM: invalid storage invoked");
        (bool success,) = _storage.call(_data);
        require(success, "VM: _storage failed");
    }
    /**
     * @inheritdoc IVersionManager
     */
    function setOwner(address _wallet, address _newOwner) external override {
        require(_isFeatureAuthorisedForWallet(_wallet, msg.sender), "VM: sender should be authorized feature");
        IWallet(_wallet).setOwner(_newOwner);
    }
    /* ***************** Internal Methods ************************* */
    function _isFeatureAuthorisedForWallet(address _wallet, address _feature) private view returns (bool) {
        return isFeatureInVersion[_feature][walletVersions[_wallet]];
    }
}

// Copyright (C) 2018  Argent Labs Ltd. <https://argent.xyz>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.5.4;

/**
 * @title Module
 * @dev Interface for a module.
 * A module MUST implement the addModule() method to ensure that a wallet with at least one module
 * can never end up in a "frozen" state.
 * @author Julien Niset - <julien@argent.xyz>
 */
interface Module {

    /**
     * @dev Inits a module for a wallet by e.g. setting some wallet specific parameters in storage.
     * @param _wallet The wallet.
     */
    function init(BaseWallet _wallet) external;

    /**
     * @dev Adds a module to a wallet.
     * @param _wallet The target wallet.
     * @param _module The modules to authorise.
     */
    function addModule(BaseWallet _wallet, Module _module) external;

    /**
    * @dev Utility method to recover any ERC20 token that was sent to the
    * module by mistake.
    * @param _token The token to recover.
    */
    function recoverToken(address _token) external;
}

/**
 * @title BaseWallet
 * @dev Simple modular wallet that authorises modules to call its invoke() method.
 * @author Julien Niset - <julien@argent.xyz>
 */
contract BaseWallet {

    // The implementation of the proxy
    address public implementation;
    // The owner
    address public owner;
    // The authorised modules
    mapping (address => bool) public authorised;
    // The enabled static calls
    mapping (bytes4 => address) public enabled;
    // The number of modules
    uint public modules;

    event AuthorisedModule(address indexed module, bool value);
    event EnabledStaticCall(address indexed module, bytes4 indexed method);
    event Invoked(address indexed module, address indexed target, uint indexed value, bytes data);
    event Received(uint indexed value, address indexed sender, bytes data);
    event OwnerChanged(address owner);

    /**
     * @dev Throws if the sender is not an authorised module.
     */
    modifier moduleOnly {
        require(authorised[msg.sender], "BW: msg.sender not an authorized module");
        _;
    }

    /**
     * @dev Inits the wallet by setting the owner and authorising a list of modules.
     * @param _owner The owner.
     * @param _modules The modules to authorise.
     */
    function init(address _owner, address[] calldata _modules) external {
        require(owner == address(0) && modules == 0, "BW: wallet already initialised");
        require(_modules.length > 0, "BW: construction requires at least 1 module");
        owner = _owner;
        modules = _modules.length;
        for (uint256 i = 0; i < _modules.length; i++) {
            require(authorised[_modules[i]] == false, "BW: module is already added");
            authorised[_modules[i]] = true;
            Module(_modules[i]).init(this);
            emit AuthorisedModule(_modules[i], true);
        }
        if (address(this).balance > 0) {
            emit Received(address(this).balance, address(0), "");
        }
    }

    /**
     * @dev Enables/Disables a module.
     * @param _module The target module.
     * @param _value Set to true to authorise the module.
     */
    function authoriseModule(address _module, bool _value) external moduleOnly {
        if (authorised[_module] != _value) {
            emit AuthorisedModule(_module, _value);
            if (_value == true) {
                modules += 1;
                authorised[_module] = true;
                Module(_module).init(this);
            } else {
                modules -= 1;
                require(modules > 0, "BW: wallet must have at least one module");
                delete authorised[_module];
            }
        }
    }

    /**
    * @dev Enables a static method by specifying the target module to which the call
    * must be delegated.
    * @param _module The target module.
    * @param _method The static method signature.
    */
    function enableStaticCall(address _module, bytes4 _method) external moduleOnly {
        require(authorised[_module], "BW: must be an authorised module for static call");
        enabled[_method] = _module;
        emit EnabledStaticCall(_module, _method);
    }

    /**
     * @dev Sets a new owner for the wallet.
     * @param _newOwner The new owner.
     */
    function setOwner(address _newOwner) external moduleOnly {
        require(_newOwner != address(0), "BW: address cannot be null");
        owner = _newOwner;
        emit OwnerChanged(_newOwner);
    }

    /**
     * @dev Performs a generic transaction.
     * @param _target The address for the transaction.
     * @param _value The value of the transaction.
     * @param _data The data of the transaction.
     */
    function invoke(address _target, uint _value, bytes calldata _data) external moduleOnly returns (bytes memory _result) {
        bool success;
        // solium-disable-next-line security/no-call-value
        (success, _result) = _target.call.value(_value)(_data);
        if (!success) {
            // solium-disable-next-line security/no-inline-assembly
            assembly {
                returndatacopy(0, 0, returndatasize)
                revert(0, returndatasize)
            }
        }
        emit Invoked(msg.sender, _target, _value, _data);
    }

    /**
     * @dev This method makes it possible for the wallet to comply to interfaces expecting the wallet to
     * implement specific static methods. It delegates the static call to a target contract if the data corresponds
     * to an enabled method, or logs the call otherwise.
     */
    function() external payable {
        if (msg.data.length > 0) {
            address module = enabled[msg.sig];
            if (module == address(0)) {
                emit Received(msg.value, msg.sender, msg.data);
            } else {
                require(authorised[module], "BW: must be an authorised module for static call");
                // solium-disable-next-line security/no-inline-assembly
                assembly {
                    calldatacopy(0, 0, calldatasize())
                    let result := staticcall(gas, module, 0, calldatasize(), 0, 0)
                    returndatacopy(0, 0, returndatasize())
                    switch result
                    case 0 {revert(0, returndatasize())}
                    default {return (0, returndatasize())}
                }
            }
        }
    }
}

{"BaseWallet.sol":{"content":"// Copyright (C) 2018  Argent Labs Ltd. \u003chttps://argent.xyz\u003e\n\n// This program is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n\n// This program is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n\n// You should have received a copy of the GNU General Public License\n// along with this program.  If not, see \u003chttp://www.gnu.org/licenses/\u003e.\n\n// SPDX-License-Identifier: GPL-3.0-only\npragma solidity ^0.6.12;\n\nimport \"./IModule.sol\";\nimport \"./IWallet.sol\";\n\n/**\n * @title BaseWallet\n * @notice Simple modular wallet that authorises modules to call its invoke() method.\n * @author Julien Niset - \u003cjulien@argent.xyz\u003e\n */\ncontract BaseWallet is IWallet {\n\n    // The implementation of the proxy\n    address public implementation;\n    // The owner\n    address public override owner;\n    // The authorised modules\n    mapping (address =\u003e bool) public override authorised;\n    // The enabled static calls\n    mapping (bytes4 =\u003e address) public override enabled;\n    // The number of modules\n    uint public override modules;\n\n    event AuthorisedModule(address indexed module, bool value);\n    event EnabledStaticCall(address indexed module, bytes4 indexed method);\n    event Invoked(address indexed module, address indexed target, uint indexed value, bytes data);\n    event Received(uint indexed value, address indexed sender, bytes data);\n    event OwnerChanged(address owner);\n\n    /**\n     * @notice Throws if the sender is not an authorised module.\n     */\n    modifier moduleOnly {\n        require(authorised[msg.sender], \"BW: msg.sender not an authorized module\");\n        _;\n    }\n\n    /**\n     * @notice Inits the wallet by setting the owner and authorising a list of modules.\n     * @param _owner The owner.\n     * @param _modules The modules to authorise.\n     */\n    function init(address _owner, address[] calldata _modules) external {\n        require(owner == address(0) \u0026\u0026 modules == 0, \"BW: wallet already initialised\");\n        require(_modules.length \u003e 0, \"BW: construction requires at least 1 module\");\n        owner = _owner;\n        modules = _modules.length;\n        for (uint256 i = 0; i \u003c _modules.length; i++) {\n            require(authorised[_modules[i]] == false, \"BW: module is already added\");\n            authorised[_modules[i]] = true;\n            IModule(_modules[i]).init(address(this));\n            emit AuthorisedModule(_modules[i], true);\n        }\n        if (address(this).balance \u003e 0) {\n            emit Received(address(this).balance, address(0), \"\");\n        }\n    }\n\n    /**\n     * @inheritdoc IWallet\n     */\n    function authoriseModule(address _module, bool _value) external override moduleOnly {\n        if (authorised[_module] != _value) {\n            emit AuthorisedModule(_module, _value);\n            if (_value == true) {\n                modules += 1;\n                authorised[_module] = true;\n                IModule(_module).init(address(this));\n            } else {\n                modules -= 1;\n                require(modules \u003e 0, \"BW: wallet must have at least one module\");\n                delete authorised[_module];\n            }\n        }\n    }\n\n    /**\n    * @inheritdoc IWallet\n    */\n    function enableStaticCall(address _module, bytes4 _method) external override moduleOnly {\n        require(authorised[_module], \"BW: must be an authorised module for static call\");\n        enabled[_method] = _module;\n        emit EnabledStaticCall(_module, _method);\n    }\n\n    /**\n     * @inheritdoc IWallet\n     */\n    function setOwner(address _newOwner) external override moduleOnly {\n        require(_newOwner != address(0), \"BW: address cannot be null\");\n        owner = _newOwner;\n        emit OwnerChanged(_newOwner);\n    }\n\n    /**\n     * @notice Performs a generic transaction.\n     * @param _target The address for the transaction.\n     * @param _value The value of the transaction.\n     * @param _data The data of the transaction.\n     */\n    function invoke(address _target, uint _value, bytes calldata _data) external moduleOnly returns (bytes memory _result) {\n        bool success;\n        (success, _result) = _target.call{value: _value}(_data);\n        if (!success) {\n            // solhint-disable-next-line no-inline-assembly\n            assembly {\n                returndatacopy(0, 0, returndatasize())\n                revert(0, returndatasize())\n            }\n        }\n        emit Invoked(msg.sender, _target, _value, _data);\n    }\n\n    /**\n     * @notice This method delegates the static call to a target contract if the data corresponds\n     * to an enabled module, or logs the call otherwise.\n     */\n    fallback() external payable {\n        address module = enabled[msg.sig];\n        if (module == address(0)) {\n            emit Received(msg.value, msg.sender, msg.data);\n        } else {\n            require(authorised[module], \"BW: must be an authorised module for static call\");\n\n            // solhint-disable-next-line no-inline-assembly\n            assembly {\n                calldatacopy(0, 0, calldatasize())\n                let result := staticcall(gas(), module, 0, calldatasize(), 0, 0)\n                returndatacopy(0, 0, returndatasize())\n                switch result\n                case 0 {revert(0, returndatasize())}\n                default {return (0, returndatasize())}\n            }\n        }\n    }\n\n    receive() external payable {\n    }\n}"},"ILockStorage.sol":{"content":"// Copyright (C) 2018  Argent Labs Ltd. \u003chttps://argent.xyz\u003e\n\n// This program is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n\n// This program is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n\n// You should have received a copy of the GNU General Public License\n// along with this program.  If not, see \u003chttp://www.gnu.org/licenses/\u003e.\n\n// SPDX-License-Identifier: GPL-3.0-only\npragma solidity \u003e=0.5.4 \u003c0.7.0;\n\ninterface ILockStorage {\n    function isLocked(address _wallet) external view returns (bool);\n\n    function getLock(address _wallet) external view returns (uint256);\n\n    function getLocker(address _wallet) external view returns (address);\n\n    function setLock(address _wallet, address _locker, uint256 _releaseAfter) external;\n}"},"IModule.sol":{"content":"// Copyright (C) 2018  Argent Labs Ltd. \u003chttps://argent.xyz\u003e\n\n// This program is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n\n// This program is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n\n// You should have received a copy of the GNU General Public License\n// along with this program.  If not, see \u003chttp://www.gnu.org/licenses/\u003e.\n\n// SPDX-License-Identifier: GPL-3.0-only\npragma solidity \u003e=0.5.4 \u003c0.7.0;\n\n/**\n * @title IModule\n * @notice Interface for a module.\n * A module MUST implement the addModule() method to ensure that a wallet with at least one module\n * can never end up in a \"frozen\" state.\n * @author Julien Niset - \u003cjulien@argent.xyz\u003e\n */\ninterface IModule {\n    /**\n     * @notice Inits a module for a wallet by e.g. setting some wallet specific parameters in storage.\n     * @param _wallet The wallet.\n     */\n    function init(address _wallet) external;\n\n    /**\t\n     * @notice Adds a module to a wallet. Cannot execute when wallet is locked (or under recovery)\t\n     * @param _wallet The target wallet.\t\n     * @param _module The modules to authorise.\t\n     */\t\n    function addModule(address _wallet, address _module) external;\n}"},"IWallet.sol":{"content":"// Copyright (C) 2018  Argent Labs Ltd. \u003chttps://argent.xyz\u003e\n\n// This program is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n\n// This program is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n\n// You should have received a copy of the GNU General Public License\n// along with this program.  If not, see \u003chttp://www.gnu.org/licenses/\u003e.\n\n// SPDX-License-Identifier: GPL-3.0-only\npragma solidity \u003e=0.5.4 \u003c0.7.0;\n\n/**\n * @title IWallet\n * @notice Interface for the BaseWallet\n */\ninterface IWallet {\n    /**\n     * @notice Returns the wallet owner.\n     * @return The wallet owner address.\n     */\n    function owner() external view returns (address);\n\n    /**\n     * @notice Returns the number of authorised modules.\n     * @return The number of authorised modules.\n     */\n    function modules() external view returns (uint);\n\n    /**\n     * @notice Sets a new owner for the wallet.\n     * @param _newOwner The new owner.\n     */\n    function setOwner(address _newOwner) external;\n\n    /**\n     * @notice Checks if a module is authorised on the wallet.\n     * @param _module The module address to check.\n     * @return `true` if the module is authorised, otherwise `false`.\n     */\n    function authorised(address _module) external view returns (bool);\n\n    /**\n     * @notice Returns the module responsible for a static call redirection.\n     * @param _sig The signature of the static call.\n     * @return the module doing the redirection\n     */\n    function enabled(bytes4 _sig) external view returns (address);\n\n    /**\n     * @notice Enables/Disables a module.\n     * @param _module The target module.\n     * @param _value Set to `true` to authorise the module.\n     */\n    function authoriseModule(address _module, bool _value) external;\n\n    /**\n    * @notice Enables a static method by specifying the target module to which the call must be delegated.\n    * @param _module The target module.\n    * @param _method The static method signature.\n    */\n    function enableStaticCall(address _module, bytes4 _method) external;\n}"},"LockStorage.sol":{"content":"// Copyright (C) 2018  Argent Labs Ltd. \u003chttps://argent.xyz\u003e\n\n// This program is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n\n// This program is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n\n// You should have received a copy of the GNU General Public License\n// along with this program.  If not, see \u003chttp://www.gnu.org/licenses/\u003e.\n\npragma solidity ^0.6.12;\nimport \"./BaseWallet.sol\";\nimport \"./Storage.sol\";\nimport \"./ILockStorage.sol\";\n\n/**\n * @title LockStorage\n * @dev Contract storing the state of wallets related to guardians and lock.\n * The contract only defines basic setters and getters with no logic. Only modules authorised\n * for a wallet can modify its state.\n * @author Julien Niset - \u003cjulien@argent.xyz\u003e\n * @author Olivier Van Den Biggelaar - \u003colivier@argent.xyz\u003e\n */\ncontract LockStorage is ILockStorage, Storage {\n\n    struct LockStorageConfig {\n        // the lock\u0027s release timestamp\n        uint256 lock;\n        // the module that set the last lock\n        address locker;\n    }\n    \n    // wallet specific storage\n    mapping (address =\u003e LockStorageConfig) internal configs;\n\n    // *************** External Functions ********************* //\n\n    /**\n     * @dev Lets an authorised module set the lock for a wallet.\n     * @param _wallet The target wallet.\n     * @param _locker The feature doing the lock.\n     * @param _releaseAfter The epoch time at which the lock should automatically release.\n     */\n    function setLock(address _wallet, address _locker, uint256 _releaseAfter) external override onlyModule(_wallet) {\n        configs[_wallet].lock = _releaseAfter;\n        if (_releaseAfter != 0 \u0026\u0026 _locker != configs[_wallet].locker) {\n            configs[_wallet].locker = _locker;\n        }\n    }\n\n    /**\n     * @dev Checks if the lock is set for a wallet.\n     * @param _wallet The target wallet.\n     * @return true if the lock is set for the wallet.\n     */\n    function isLocked(address _wallet) external view override returns (bool) {\n        return configs[_wallet].lock \u003e now;\n    }\n\n    /**\n     * @dev Gets the time at which the lock of a wallet will release.\n     * @param _wallet The target wallet.\n     * @return the time at which the lock of a wallet will release, or zero if there is no lock set.\n     */\n    function getLock(address _wallet) external view override returns (uint256) {\n        return configs[_wallet].lock;\n    }\n\n    /**\n     * @dev Gets the address of the last module that modified the lock for a wallet.\n     * @param _wallet The target wallet.\n     * @return the address of the last module that modified the lock for a wallet.\n     */\n    function getLocker(address _wallet) external view override returns (address) {\n        return configs[_wallet].locker;\n    }\n}"},"Storage.sol":{"content":"// Copyright (C) 2018  Argent Labs Ltd. \u003chttps://argent.xyz\u003e\n\n// This program is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n\n// This program is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n// GNU General Public License for more details.\n\n// You should have received a copy of the GNU General Public License\n// along with this program.  If not, see \u003chttp://www.gnu.org/licenses/\u003e.\n\n// SPDX-License-Identifier: GPL-3.0-only\npragma solidity \u003e=0.5.4 \u003c0.7.0;\n\nimport \"./IWallet.sol\";\n\n/**\n * @title Storage\n * @notice Base contract for the storage of a wallet.\n * @author Julien Niset - \u003cjulien@argent.xyz\u003e\n */\ncontract Storage {\n\n    /**\n     * @notice Throws if the caller is not an authorised module.\n     */\n    modifier onlyModule(address _wallet) {\n        require(IWallet(_wallet).authorised(msg.sender), \"TS: must be an authorized module to call this method\");\n        _;\n    }\n}"}}