// File: /Users/wildmouse/ghq/github.com/iroiro/iroiro/contract/contracts/distributors/UUID.sol



// SPDX-License-Identifier: GPL-3.0
/*
 *     Copyright (C) 2021 TART K.K.
 *
 *     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 https://www.gnu.org/licenses/.
 */

pragma solidity =0.7.6;

import "@iroiro/merkle-distributor/contracts/StringMerkleDistributorManager.sol";
import "../interfaces/DistributorInterfaceV1.sol";

contract UUIDDistributor is DistributorInterfaceV1, StringMerkleDistributorManager {
    constructor (string memory _distributorInfoCid)
    DistributorInterfaceV1(_distributorInfoCid) {}

    function createCampaign(
        bytes32 merkleRoot,
        address payable token,
        string calldata merkleTreeCid,
        string calldata campaignInfoCid,
        uint256 allowance
    ) external override {
        emit CreateCampaign(
            nextDistributionId,
            token,
            msg.sender,
            merkleTreeCid,
            campaignInfoCid
        );

        addDistribution(token, merkleRoot, allowance);
    }
}

// File: /Users/wildmouse/ghq/github.com/iroiro/iroiro/contract/contracts/interfaces/DistributorInterfaceV1.sol



// SPDX-License-Identifier: GPL-3.0
/*
 *     Copyright (C) 2021 TART K.K.
 *
 *     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 https://www.gnu.org/licenses/.
 */
pragma solidity =0.7.6;

import "@openzeppelin/contracts/access/Ownable.sol";

contract DistributorInterfaceV1 is Ownable {
    event UpdateDistributorInfo(
        string cid
    );

    event CreateCampaign(
        uint64 indexed distributionId,
        address indexed token,
        address indexed creator,
        string merkleTreeCid,
        string campaignInfoCid
    );

    constructor(string memory distributorInfoCid) {
        emit UpdateDistributorInfo(distributorInfoCid);
    }

    function createCampaign(
        bytes32 merkleRoot,
        address payable token,
        string memory merkleTreeCid,
        string memory campaignInfoCid,
        uint256 allowance
    ) virtual external {}

    function updateDistributorInfo(string calldata distributorInfoCid) external onlyOwner {
        emit UpdateDistributorInfo(distributorInfoCid);
    }
}

// File: @iroiro/merkle-distributor/contracts/SafeMath64.sol



// SPDX-License-Identifier: MIT
// See https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/SafeMath.sol

pragma solidity =0.7.6;

/**
 * @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 SafeMath64 {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint64 a, uint64 b) internal pure returns (uint64) {
        uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
        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(uint64 a, uint64 b, string memory errorMessage) internal pure returns (uint64) {
        require(b <= a, errorMessage);
        uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
        // 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;
        }

        uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
        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(uint64 a, uint64 b, string memory errorMessage) internal pure returns (uint64) {
        require(b > 0, errorMessage);
        uint64 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(uint64 a, uint64 b) internal pure returns (uint64) {
        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(uint64 a, uint64 b, string memory errorMessage) internal pure returns (uint64) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @iroiro/merkle-distributor/contracts/StringMerkleDistributorManager.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.7.6;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/cryptography/MerkleProof.sol";
import "./interfaces/IMerkleDistributorManager.sol";

contract StringMerkleDistributorManager is IMerkleDistributorManager {
    function claim(
        uint64 distributionId,
        uint256 index,
        string calldata target,
        uint256 amount,
        bytes32[] calldata merkleProof
    ) virtual external {
        require(!isClaimed(distributionId, index), 'MerkleDistributor: Drop already claimed.');
        Distribution storage dist = distributionMap[distributionId];
        require(amount <= dist.remainingAmount, "MerkleDistributor: Insufficient token.");

        // Verify the merkle proof.
        bytes32 hashed = keccak256(abi.encodePacked(target));
        bytes32 node = keccak256(abi.encodePacked(index, hashed, amount));
        require(MerkleProof.verify(merkleProof, dist.merkleRoot, node), 'MerkleDistributor: Invalid proof.');

        // Mark it claimed and send the token.
        _setClaimed(distributionId, index);
        dist.remainingAmount = dist.remainingAmount - amount;

        require(IERC20(dist.token).transfer(msg.sender, amount), 'MerkleDistributor: Transfer failed.');

        emit Claimed(distributionId, msg.sender, amount);
    }
}

// File: @iroiro/merkle-distributor/contracts/interfaces/IMerkleDistributorManager.sol



// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.7.6;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../SafeMath64.sol";

contract IMerkleDistributorManager {
    using SafeMath64 for uint64;

    struct Distribution {
        address token;
        bytes32 merkleRoot;
        uint256 remainingAmount;
    }

    uint64 public nextDistributionId = 1;
    mapping(uint64 => Distribution) public distributionMap;

    // This is a packed array of booleans.
    mapping(uint256 => mapping(uint256 => uint256)) private claimedBitMap;

    function token(uint64 distributionId) external view returns (address) {
        return distributionMap[distributionId].token;
    }

    function merkleRoot(uint64 distributionId) external view returns (bytes32) {
        return distributionMap[distributionId].merkleRoot;
    }

    function remainingAmount(uint64 distributionId) external view returns (uint256) {
        return distributionMap[distributionId].remainingAmount;
    }

    function isClaimed(uint64 distributionId, uint256 index) public view returns (bool) {
        uint256 claimedWordIndex = index / 256;
        uint256 claimedBitIndex = index % 256;
        uint256 claimedWord = claimedBitMap[distributionId][claimedWordIndex];
        uint256 mask = (1 << claimedBitIndex);
        return claimedWord & mask == mask;
    }

    function _setClaimed(uint64 distributionId, uint256 index) internal {
        uint256 claimedWordIndex = index / 256;
        uint256 claimedBitIndex = index % 256;
        claimedBitMap[distributionId][claimedWordIndex] =
        claimedBitMap[distributionId][claimedWordIndex] | (1 << claimedBitIndex);
    }

    function addDistribution(
        address payable newToken,
        bytes32 newMerkleRoot,
        uint256 allowance
    ) public {
        Distribution memory dist = Distribution(newToken, newMerkleRoot, allowance);
        distributionMap[nextDistributionId] = dist;
        nextDistributionId = nextDistributionId.add(1);
        IERC20 erc20 = IERC20(newToken);

        erc20.transferFrom(msg.sender, address(this), allowance);
    }

    event Claimed(
        uint64 indexed distributionId,
        address indexed account,
        uint256 amount
    );
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

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

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: @openzeppelin/contracts/cryptography/MerkleProof.sol



// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev These functions deal with verification of Merkle trees (hash trees),
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(bytes32[] memory proof, bytes32 root, bytes32 leaf) internal pure returns (bool) {
        bytes32 computedHash = leaf;

        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];

            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
            }
        }

        // Check if the computed hash (root) is equal to the provided root
        return computedHash == root;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

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

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

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

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

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

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

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

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

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