Contract

0x187aAFEd586AbB1A4D114aaE255e8641749d96a7

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$0.00

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0x5f672d71...81247E025 at txn 0x01436d6ad0d1318db320de0c2e6759ffce28bdfb6c6722894af90d82e57bdc97

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Latest 1 from a total of 1 transactions

	Transaction Hash	Method Search by Function Name / Method ID	Block	Set Duration Last 1H Last 24H Last 7D Last 30D Last 90D Last 180D Custom Duration From To	From		To	Set Amounts 0-1 1-10 1-100 1-1k 1-10k 1-100k 1-1m Custom Amounts Amount must be 0 or greater than or equals 0.00001
	0x8cea4ad5c5dedd7fc8a4dbbdee76038f0f53e4ccfa8adb025fc58bf2d6a10eb0	Claim	25021303	2022-11-17 7:04:05	888 days ago	1668668645	0x2D815240...D09F289d0	IN	0x187aAFEd...1749d96a7	0 xDAI$0.00	0.0000347	1

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Contract Source Code Verified (Exact Match)

Contract Name:

TokenDistro

Compiler Version

v0.8.6+commit.11564f7e

Optimization Enabled:

Yes with 999999 runs

Other Settings:

default evmVersion

Contract Source Code (Solidity)

IDE

/**
 *Submitted for verification at gnosisscan.io on 2022-08-05
*/

// File: contracts/Interfaces/IDistro.sol



pragma solidity =0.8.6;

interface IDistro {
    /**
     * @dev Emitted when someone makes a claim of tokens
     */
    event Claim(address indexed grantee, uint256 amount);
    /**
     * @dev Emitted when the DISTRIBUTOR allocate an amount to a grantee
     */
    event Allocate(
        address indexed distributor,
        address indexed grantee,
        uint256 amount
    );
    /**
     * @dev Emitted when the DEFAULT_ADMIN assign an amount to a DISTRIBUTOR
     */
    event Assign(
        address indexed admin,
        address indexed distributor,
        uint256 amount
    );
    /**
     * @dev Emitted when someone change their reception address
     */
    event ChangeAddress(address indexed oldAddress, address indexed newAddress);

    /**
     * @dev Emitted when a new startTime is set
     */
    event StartTimeChanged(uint256 newStartTime, uint256 newCliffTime);

    /**
     * @dev Returns the total amount of tokens will be streamed
     */
    function totalTokens() external view returns (uint256);

    /**
     * Function that allows the DEFAULT_ADMIN_ROLE to assign set a new startTime if it hasn't started yet
     * @param newStartTime new startTime
     *
     * Emits a {StartTimeChanged} event.
     *
     */
    function setStartTime(uint256 newStartTime) external;

    /**
     * Function that allows the DEFAULT_ADMIN_ROLE to assign tokens to an address who later can distribute them.
     * @dev It is required that the DISTRIBUTOR_ROLE is already held by the address to which an amount will be assigned
     * @param distributor the address, generally a smart contract, that will determine who gets how many tokens
     * @param amount Total amount of tokens to assign to that address for distributing
     */
    function assign(address distributor, uint256 amount) external;

    /**
     * Function to claim tokens for a specific address. It uses the current timestamp
     */
    function claim() external;

    /**
     * Function that allows to the distributor address to allocate some amount of tokens to a specific recipient
     * @dev Needs to be initialized: Nobody has the DEFAULT_ADMIN_ROLE and all available tokens have been assigned
     * @param recipient of token allocation
     * @param amount allocated amount
     * @param claim whether claim after allocate
     */
    function allocate(
        address recipient,
        uint256 amount,
        bool claim
    ) external;

    /**
     * Function that allows to the distributor address to allocate some amounts of tokens to specific recipients
     * @dev Needs to be initialized: Nobody has the DEFAULT_ADMIN_ROLE and all available tokens have been assigned
     * @param recipients of token allocation
     * @param amounts allocated amount
     */
    function allocateMany(address[] memory recipients, uint256[] memory amounts)
        external;

    function sendGIVbacks(address[] memory recipients, uint256[] memory amounts)
        external;

    /**
     * Function that allows a recipient to change its address
     * @dev The change can only be made to an address that has not previously received an allocation &
     * the distributor cannot change its address
     */
    function changeAddress(address newAddress) external;

    /**
     * Function to get the current timestamp from the block
     */
    function getTimestamp() external view returns (uint256);

    /**
     * Function to get the total unlocked tokes at some moment
     */
    function globallyClaimableAt(uint256 timestamp)
        external
        view
        returns (uint256);

    /**
     * Function to get the unlocked tokes at some moment for a specific address
     */
    function claimableAt(address recipient, uint256 timestamp)
        external
        view
        returns (uint256);

    /**
     * Function to get the unlocked tokens for a specific address. It uses the current timestamp
     */
    function claimableNow(address recipient) external view returns (uint256);

    function cancelAllocation(address prevRecipient, address newRecipient)
        external;
}

// File: openzeppelin-contracts-upgradable-v4/utils/structs/EnumerableSetUpgradeable.sol



pragma solidity ^0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSetUpgradeable {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;
        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping(bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) {
            // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            if (lastIndex != toDeleteIndex) {
                bytes32 lastvalue = set._values[lastIndex];

                // Move the last value to the index where the value to delete is
                set._values[toDeleteIndex] = lastvalue;
                // Update the index for the moved value
                set._indexes[lastvalue] = valueIndex; // Replace lastvalue's index to valueIndex
            }

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        assembly {
            result := store
        }

        return result;
    }

    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

    /**
     * @dev Returns the value stored at position `index` in the set. O(1).
     *
     * Note that there are no guarantees on the ordering of values inside the
     * array, and it may change when more values are added or removed.
     *
     * Requirements:
     *
     * - `index` must be strictly less than {length}.
     */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        assembly {
            result := store
        }

        return result;
    }
}

// File: openzeppelin-contracts-upgradable-v4/utils/introspection/IERC165Upgradeable.sol



pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File: openzeppelin-contracts-upgradable-v4/utils/StringsUpgradeable.sol



pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library StringsUpgradeable {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// File: openzeppelin-contracts-upgradable-v4/proxy/utils/Initializable.sol



pragma solidity ^0.8.0;

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        require(_initializing || !_initialized, "Initializable: contract is already initialized");

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

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }
}

// File: openzeppelin-contracts-upgradable-v4/utils/introspection/ERC165Upgradeable.sol



pragma solidity ^0.8.0;



/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal initializer {
        __ERC165_init_unchained();
    }

    function __ERC165_init_unchained() internal initializer {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }
    uint256[50] private __gap;
}

// File: openzeppelin-contracts-upgradable-v4/utils/ContextUpgradeable.sol



pragma solidity ^0.8.0;


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

    function __Context_init_unchained() internal initializer {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    uint256[50] private __gap;
}

// File: openzeppelin-contracts-upgradable-v4/access/IAccessControlUpgradeable.sol



pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// File: openzeppelin-contracts-upgradable-v4/access/AccessControlUpgradeable.sol



pragma solidity ^0.8.0;






/**
 * @dev Contract module that allows children to implement role-based access
 * control mechanisms. This is a lightweight version that doesn't allow enumerating role
 * members except through off-chain means by accessing the contract event logs. Some
 * applications may benefit from on-chain enumerability, for those cases see
 * {AccessControlEnumerable}.
 *
 * Roles are referred to by their `bytes32` identifier. These should be exposed
 * in the external API and be unique. The best way to achieve this is by
 * using `public constant` hash digests:
 *
 * ```
 * bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
 * ```
 *
 * Roles can be used to represent a set of permissions. To restrict access to a
 * function call, use {hasRole}:
 *
 * ```
 * function foo() public {
 *     require(hasRole(MY_ROLE, msg.sender));
 *     ...
 * }
 * ```
 *
 * Roles can be granted and revoked dynamically via the {grantRole} and
 * {revokeRole} functions. Each role has an associated admin role, and only
 * accounts that have a role's admin role can call {grantRole} and {revokeRole}.
 *
 * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
 * that only accounts with this role will be able to grant or revoke other
 * roles. More complex role relationships can be created by using
 * {_setRoleAdmin}.
 *
 * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
 * grant and revoke this role. Extra precautions should be taken to secure
 * accounts that have been granted it.
 */
abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {
    function __AccessControl_init() internal initializer {
        __Context_init_unchained();
        __ERC165_init_unchained();
        __AccessControl_init_unchained();
    }

    function __AccessControl_init_unchained() internal initializer {
    }
    struct RoleData {
        mapping(address => bool) members;
        bytes32 adminRole;
    }

    mapping(bytes32 => RoleData) private _roles;

    bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;

    /**
     * @dev Modifier that checks that an account has a specific role. Reverts
     * with a standardized message including the required role.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     *
     * _Available since v4.1._
     */
    modifier onlyRole(bytes32 role) {
        _checkRole(role, _msgSender());
        _;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns `true` if `account` has been granted `role`.
     */
    function hasRole(bytes32 role, address account) public view override returns (bool) {
        return _roles[role].members[account];
    }

    /**
     * @dev Revert with a standard message if `account` is missing `role`.
     *
     * The format of the revert reason is given by the following regular expression:
     *
     *  /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
     */
    function _checkRole(bytes32 role, address account) internal view {
        if (!hasRole(role, account)) {
            revert(
                string(
                    abi.encodePacked(
                        "AccessControl: account ",
                        StringsUpgradeable.toHexString(uint160(account), 20),
                        " is missing role ",
                        StringsUpgradeable.toHexString(uint256(role), 32)
                    )
                )
            );
        }
    }

    /**
     * @dev Returns the admin role that controls `role`. See {grantRole} and
     * {revokeRole}.
     *
     * To change a role's admin, use {_setRoleAdmin}.
     */
    function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
        return _roles[role].adminRole;
    }

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

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

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

        _revokeRole(role, account);
    }

    /**
     * @dev Grants `role` to `account`.
     *
     * If `account` had not been already granted `role`, emits a {RoleGranted}
     * event. Note that unlike {grantRole}, this function doesn't perform any
     * checks on the calling account.
     *
     * [WARNING]
     * ====
     * This function should only be called from the constructor when setting
     * up the initial roles for the system.
     *
     * Using this function in any other way is effectively circumventing the admin
     * system imposed by {AccessControl}.
     * ====
     */
    function _setupRole(bytes32 role, address account) internal virtual {
        _grantRole(role, account);
    }

    /**
     * @dev Sets `adminRole` as ``role``'s admin role.
     *
     * Emits a {RoleAdminChanged} event.
     */
    function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
        bytes32 previousAdminRole = getRoleAdmin(role);
        _roles[role].adminRole = adminRole;
        emit RoleAdminChanged(role, previousAdminRole, adminRole);
    }

    function _grantRole(bytes32 role, address account) private {
        if (!hasRole(role, account)) {
            _roles[role].members[account] = true;
            emit RoleGranted(role, account, _msgSender());
        }
    }

    function _revokeRole(bytes32 role, address account) private {
        if (hasRole(role, account)) {
            _roles[role].members[account] = false;
            emit RoleRevoked(role, account, _msgSender());
        }
    }
    uint256[49] private __gap;
}

// File: openzeppelin-contracts-upgradable-v4/access/IAccessControlEnumerableUpgradeable.sol



pragma solidity ^0.8.0;


/**
 * @dev External interface of AccessControlEnumerable declared to support ERC165 detection.
 */
interface IAccessControlEnumerableUpgradeable is IAccessControlUpgradeable {
    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) external view returns (address);

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) external view returns (uint256);
}

// File: openzeppelin-contracts-upgradable-v4/access/AccessControlEnumerableUpgradeable.sol



pragma solidity ^0.8.0;





/**
 * @dev Extension of {AccessControl} that allows enumerating the members of each role.
 */
abstract contract AccessControlEnumerableUpgradeable is Initializable, IAccessControlEnumerableUpgradeable, AccessControlUpgradeable {
    function __AccessControlEnumerable_init() internal initializer {
        __Context_init_unchained();
        __ERC165_init_unchained();
        __AccessControl_init_unchained();
        __AccessControlEnumerable_init_unchained();
    }

    function __AccessControlEnumerable_init_unchained() internal initializer {
    }
    using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet;

    mapping(bytes32 => EnumerableSetUpgradeable.AddressSet) private _roleMembers;

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IAccessControlEnumerableUpgradeable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev Returns one of the accounts that have `role`. `index` must be a
     * value between 0 and {getRoleMemberCount}, non-inclusive.
     *
     * Role bearers are not sorted in any particular way, and their ordering may
     * change at any point.
     *
     * WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
     * you perform all queries on the same block. See the following
     * https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
     * for more information.
     */
    function getRoleMember(bytes32 role, uint256 index) public view override returns (address) {
        return _roleMembers[role].at(index);
    }

    /**
     * @dev Returns the number of accounts that have `role`. Can be used
     * together with {getRoleMember} to enumerate all bearers of a role.
     */
    function getRoleMemberCount(bytes32 role) public view override returns (uint256) {
        return _roleMembers[role].length();
    }

    /**
     * @dev Overload {grantRole} to track enumerable memberships
     */
    function grantRole(bytes32 role, address account) public virtual override(AccessControlUpgradeable, IAccessControlUpgradeable) {
        super.grantRole(role, account);
        _roleMembers[role].add(account);
    }

    /**
     * @dev Overload {revokeRole} to track enumerable memberships
     */
    function revokeRole(bytes32 role, address account) public virtual override(AccessControlUpgradeable, IAccessControlUpgradeable) {
        super.revokeRole(role, account);
        _roleMembers[role].remove(account);
    }

    /**
     * @dev Overload {renounceRole} to track enumerable memberships
     */
    function renounceRole(bytes32 role, address account) public virtual override(AccessControlUpgradeable, IAccessControlUpgradeable) {
        super.renounceRole(role, account);
        _roleMembers[role].remove(account);
    }

    /**
     * @dev Overload {_setupRole} to track enumerable memberships
     */
    function _setupRole(bytes32 role, address account) internal virtual override {
        super._setupRole(role, account);
        _roleMembers[role].add(account);
    }
    uint256[49] private __gap;
}

// File: openzeppelin-contracts-upgradable-v4/utils/AddressUpgradeable.sol



pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: openzeppelin-contracts-upgradable-v4/token/ERC20/IERC20Upgradeable.sol



pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

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

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

// File: openzeppelin-contracts-upgradable-v4/token/ERC20/utils/SafeERC20Upgradeable.sol



pragma solidity ^0.8.0;



/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    function safeTransfer(
        IERC20Upgradeable token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20Upgradeable token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20Upgradeable token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

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

// File: contracts/TokenDistro/TokenDistro.sol


pragma solidity =0.8.6;






/**
 * Contract responsible for managing the release of tokens over time.
 * The distributor is in charge of releasing the corresponding amounts to its recipients.
 * This distributor is expected to be another smart contract, such as a merkledrop or the liquidity mining smart contract
 */
contract TokenDistro is
    Initializable,
    IDistro,
    AccessControlEnumerableUpgradeable
{
    using SafeERC20Upgradeable for IERC20Upgradeable;

    // bytes32 public constant DISTRIBUTOR_ROLE = keccak256("DISTRIBUTOR_ROLE");
    bytes32 public constant DISTRIBUTOR_ROLE =
        0xfbd454f36a7e1a388bd6fc3ab10d434aa4578f811acbbcf33afb1c697486313c;

    // Structure to of the accounting for each account
    struct accountStatus {
        uint256 allocatedTokens;
        uint256 claimed;
    }

    mapping(address => accountStatus) public balances; // Mapping with all accounts that have received an allocation

    uint256 public override totalTokens; // total tokens to be distribute
    uint256 public startTime; // Instant of time in which distribution begins
    uint256 public cliffTime; // Instant of time in which tokens will begin to be released
    uint256 public duration;
    uint256 public initialAmount; // Initial amount that will be available from startTime
    uint256 public lockedAmount; // Amount that will be released over time from cliffTime

    IERC20Upgradeable public token; // Token to be distribute
    bool public cancelable; // Variable that allows the ADMIN_ROLE to cancel an allocation

    /**
     * @dev Emitted when the DISTRIBUTOR allocate an amount of givBack to a recipient
     */
    event GivBackPaid(address distributor);

    modifier onlyDistributor() {
        require(
            hasRole(DISTRIBUTOR_ROLE, msg.sender),
            "TokenDistro::onlyDistributor: ONLY_DISTRIBUTOR_ROLE"
        );

        require(
            balances[msg.sender].claimed == 0,
            "TokenDistro::onlyDistributor: DISTRIBUTOR_CANNOT_CLAIM"
        );
        _;
    }

    /**
     * @dev Initially the deployer of the contract will be able to assign the tokens to one or several addresses,
     *      these addresses (EOA or Smart Contracts) are responsible to allocate tokens to specific addresses which can
     *      later claim them
     * @param _totalTokens Total amount of tokens to distribute
     * @param _startTime Unix time that the distribution begins
     * @param _cliffPeriod Number of seconds to delay the claiming period for the tokens not initially released
     * @param _duration Time it will take for all tokens to be distributed
     * @param _initialPercentage Percentage of tokens initially released (2 decimals, 1/10000)
     * @param _token Address of the token to distribute
     * @param _cancelable In case the owner wants to have the power to cancel an assignment
     */
    function initialize(
        uint256 _totalTokens,
        uint256 _startTime,
        uint256 _cliffPeriod,
        uint256 _duration,
        uint256 _initialPercentage,
        IERC20Upgradeable _token,
        bool _cancelable
    ) public initializer {
        require(
            _duration >= _cliffPeriod,
            "TokenDistro::constructor: DURATION_LESS_THAN_CLIFF"
        );
        require(
            _initialPercentage <= 10000,
            "TokenDistro::constructor: INITIALPERCENTAGE_GREATER_THAN_100"
        );
        __AccessControlEnumerable_init();
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);

        uint256 _initialAmount = (_totalTokens * _initialPercentage) / 10000;

        token = _token;
        duration = _duration;
        startTime = _startTime;
        totalTokens = _totalTokens;
        initialAmount = _initialAmount;
        cliffTime = _startTime + _cliffPeriod;
        lockedAmount = _totalTokens - _initialAmount;
        balances[address(this)].allocatedTokens = _totalTokens;
        cancelable = _cancelable;
    }

    /**
     * Function that allows the DEFAULT_ADMIN_ROLE to assign set a new startTime if it hasn't started yet
     * @param newStartTime new startTime
     *
     * Emits a {StartTimeChanged} event.
     *
     */
    function setStartTime(uint256 newStartTime) external override {
        require(
            hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
            "TokenDistro::assign: ONLY_ADMIN_ROLE"
        );
        require(
            startTime > getTimestamp() && newStartTime > getTimestamp(),
            "TokenDistro::assign: IF_HAS_NOT_STARTED_YET"
        );

        uint256 _cliffPeriod = cliffTime - startTime;
        startTime = newStartTime;
        cliffTime = newStartTime + _cliffPeriod;

        emit StartTimeChanged(startTime, cliffTime);
    }

    /**
     * Function that allows the DEFAULT_ADMIN_ROLE to assign tokens to an address who later can distribute them.
     * @dev It is required that the DISTRIBUTOR_ROLE is already held by the address to which an amount will be assigned
     * @param distributor the address, generally a smart contract, that will determine who gets how many tokens
     * @param amount Total amount of tokens to assign to that address for distributing
     *
     * Emits a {Assign} event.
     *
     */
    function assign(address distributor, uint256 amount) external override {
        require(
            hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
            "TokenDistro::assign: ONLY_ADMIN_ROLE"
        );
        require(
            hasRole(DISTRIBUTOR_ROLE, distributor),
            "TokenDistro::assign: ONLY_TO_DISTRIBUTOR_ROLE"
        );

        balances[address(this)].allocatedTokens =
            balances[address(this)].allocatedTokens -
            amount;
        balances[distributor].allocatedTokens =
            balances[distributor].allocatedTokens +
            amount;

        emit Assign(msg.sender, distributor, amount);
    }

    /**
     * Function to claim tokens for a specific address. It uses the current timestamp
     *
     * Emits a {claim} event.
     *
     */
    function claimTo(address account) external {
        // This check is not necessary as it does not break anything, just changes the claimed value
        // for this contract
        //require(address(this) != account, "TokenDistro::claimTo: CANNOT_CLAIM_FOR_CONTRACT_ITSELF");
        _claim(account);
    }

    /**
     * Function to claim tokens for a specific address. It uses the current timestamp
     *
     * Emits a {claim} event.
     *
     */
    function claim() external override {
        _claim(msg.sender);
    }

    /**
     * Function that allows to the distributor address to allocate some amount of tokens to a specific recipient
     * @param recipient of token allocation
     * @param amount allocated amount
     * @param claim whether claim after allocate
     *
     * Emits a {Allocate} event.
     *
     */
    function _allocate(
        address recipient,
        uint256 amount,
        bool claim
    ) internal {
        require(
            !hasRole(DISTRIBUTOR_ROLE, recipient),
            "TokenDistro::allocate: DISTRIBUTOR_NOT_VALID_RECIPIENT"
        );

        balances[msg.sender].allocatedTokens =
            balances[msg.sender].allocatedTokens -
            amount;

        balances[recipient].allocatedTokens =
            balances[recipient].allocatedTokens +
            amount;

        if (claim && claimableNow(recipient) > 0) {
            _claim(recipient);
        }

        emit Allocate(msg.sender, recipient, amount);
    }

    function allocate(
        address recipient,
        uint256 amount,
        bool claim
    ) external override onlyDistributor {
        _allocate(recipient, amount, claim);
    }

    /**
     * Function that allows to the distributor address to allocate some amounts of tokens to specific recipients
     * @dev Needs to be initialized: Nobody has the DEFAULT_ADMIN_ROLE and all available tokens have been assigned
     * @param recipients of token allocation
     * @param amounts allocated amount
     *
     * Unlike allocate method it doesn't claim recipients available balance
     */
    function _allocateMany(
        address[] memory recipients,
        uint256[] memory amounts
    ) internal onlyDistributor {
        require(
            recipients.length == amounts.length,
            "TokenDistro::allocateMany: INPUT_LENGTH_NOT_MATCH"
        );

        for (uint256 i = 0; i < recipients.length; i++) {
            _allocate(recipients[i], amounts[i], false);
        }
    }

    function allocateMany(address[] memory recipients, uint256[] memory amounts)
        external
        override
    {
        _allocateMany(recipients, amounts);
    }

    function sendGIVbacks(address[] memory recipients, uint256[] memory amounts)
        external
        override
    {
        _allocateMany(recipients, amounts);
        emit GivBackPaid(msg.sender);
    }

    /**
     * Function that allows a recipient to change its address
     * @dev The change can only be made to an address that has not previously received an allocation &
     * the distributor cannot change its address
     *
     * Emits a {ChangeAddress} event.
     *
     */
    function changeAddress(address newAddress) external override {
        require(
            balances[newAddress].allocatedTokens == 0 &&
                balances[newAddress].claimed == 0,
            "TokenDistro::changeAddress: ADDRESS_ALREADY_IN_USE"
        );

        require(
            !hasRole(DISTRIBUTOR_ROLE, msg.sender) &&
                !hasRole(DISTRIBUTOR_ROLE, newAddress),
            "TokenDistro::changeAddress: DISTRIBUTOR_ROLE_NOT_A_VALID_ADDRESS"
        );

        balances[newAddress].allocatedTokens = balances[msg.sender]
            .allocatedTokens;
        balances[msg.sender].allocatedTokens = 0;

        balances[newAddress].claimed = balances[msg.sender].claimed;
        balances[msg.sender].claimed = 0;

        emit ChangeAddress(msg.sender, newAddress);
    }

    /**
     * Function to get the current timestamp from the block
     */
    function getTimestamp() public view virtual override returns (uint256) {
        return block.timestamp;
    }

    /**
     * Function to get the total claimable tokens at some moment
     * @param timestamp Unix time to check the number of tokens claimable
     * @return Number of tokens claimable at that timestamp
     */
    function globallyClaimableAt(uint256 timestamp)
        public
        view
        override
        returns (uint256)
    {
        if (timestamp < startTime) return 0;
        if (timestamp < cliffTime) return initialAmount;
        if (timestamp > startTime + duration) return totalTokens;

        uint256 deltaTime = timestamp - startTime;
        return initialAmount + (deltaTime * lockedAmount) / duration;
    }

    /**
     * Function to get the unlocked tokes at some moment for a specific address
     * @param recipient account to query
     * @param timestamp Instant of time in which the calculation is made
     */
    function claimableAt(address recipient, uint256 timestamp)
        public
        view
        override
        returns (uint256)
    {
        require(
            !hasRole(DISTRIBUTOR_ROLE, recipient),
            "TokenDistro::claimableAt: DISTRIBUTOR_ROLE_CANNOT_CLAIM"
        );
        require(
            timestamp >= getTimestamp(),
            "TokenDistro::claimableAt: NOT_VALID_PAST_TIMESTAMP"
        );
        uint256 unlockedAmount = (globallyClaimableAt(timestamp) *
            balances[recipient].allocatedTokens) / totalTokens;

        return unlockedAmount - balances[recipient].claimed;
    }

    /**
     * Function to get the unlocked tokens for a specific address. It uses the current timestamp
     * @param recipient account to query
     */
    function claimableNow(address recipient)
        public
        view
        override
        returns (uint256)
    {
        return claimableAt(recipient, getTimestamp());
    }

    /**
     * Function that allows the DEFAULT_ADMIN_ROLE to change a recipient in case it wants to cancel an allocation
     * @dev The change can only be made when cancelable is true and to an address that has not previously received
     * an allocation and the distributor cannot change its address
     *
     * Emits a {ChangeAddress} event.
     *
     */
    function cancelAllocation(address prevRecipient, address newRecipient)
        external
        override
    {
        require(cancelable, "TokenDistro::cancelAllocation: NOT_CANCELABLE");

        require(
            hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
            "TokenDistro::cancelAllocation: ONLY_ADMIN_ROLE"
        );

        require(
            balances[newRecipient].allocatedTokens == 0 &&
                balances[newRecipient].claimed == 0,
            "TokenDistro::cancelAllocation: ADDRESS_ALREADY_IN_USE"
        );

        require(
            !hasRole(DISTRIBUTOR_ROLE, prevRecipient) &&
                !hasRole(DISTRIBUTOR_ROLE, newRecipient),
            "TokenDistro::cancelAllocation: DISTRIBUTOR_ROLE_NOT_A_VALID_ADDRESS"
        );

        balances[newRecipient].allocatedTokens = balances[prevRecipient]
            .allocatedTokens;
        balances[prevRecipient].allocatedTokens = 0;

        balances[newRecipient].claimed = balances[prevRecipient].claimed;
        balances[prevRecipient].claimed = 0;

        emit ChangeAddress(prevRecipient, newRecipient);
    }

    /**
     * Function to claim tokens for a specific address. It uses the current timestamp
     *
     * Emits a {claim} event.
     *
     */
    function _claim(address recipient) private {
        uint256 remainingToClaim = claimableNow(recipient);

        require(
            remainingToClaim > 0,
            "TokenDistro::claim: NOT_ENOUGTH_TOKENS_TO_CLAIM"
        );

        balances[recipient].claimed =
            balances[recipient].claimed +
            remainingToClaim;

        token.safeTransfer(recipient, remainingToClaim);

        emit Claim(recipient, remainingToClaim);
    }
}

Contract Security Audit

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Contract ABI

API

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IERC20Upgradeable","name":"_token","type":"address"},{"internalType":"bool","name":"_cancelable","type":"bool"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"lockedAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"recipients","type":"address[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"name":"sendGIVbacks","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newStartTime","type":"uint256"}],"name":"setStartTime","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"startTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"contract IERC20Upgradeable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalTokens","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

Contract Creation Code

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.

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