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// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;
import "./interfaces/ISwapContract.sol";
import "./interfaces/ISwapRewards.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "./interfaces/lib/SafeERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

//import "hardhat/console.sol"; //console.log()

contract SwapContract is ISwapContract, Ownable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    IBurnableToken public immutable lpToken;
    ISwapRewards public immutable sw;

    /** Skybridge */
    mapping(address => bool) public whitelist;
    address public immutable BTCT_ADDR;
    uint256 private immutable convertScale;
    uint256 private immutable lpDivisor;
    address public buybackAddress;
    address public sbBTCPool;
    uint256 public withdrawalFeeBPS;
    uint256 public nodeRewardsRatio;
    uint256 public buybackRewardsRatio;

    mapping(address => uint256) private floatAmountOf;
    mapping(bytes32 => bool) private used; //used TX

    /** TSS */
    // Node lists state { 0 => not exist, 1 => exist, 2 => removed }
    mapping(address => uint8) private nodes;
    address[] private nodeAddrs;
    uint8 public activeNodeCount;
    uint8 public churnedInCount;
    uint8 public tssThreshold;

    /**
     * Events
     */
    event Swap(address from, address to, uint256 amount);

    event RewardsCollection(
        address feesToken,
        uint256 rewards,
        uint256 rewardsLPTTotal,
        uint256 currentPriceLP
    );

    event IssueLPTokensForFloat(
        address to,
        uint256 amountOfFloat,
        uint256 amountOfLP,
        uint256 currentPriceLP,
        uint256 depositFees,
        bytes32 txid
    );

    event BurnLPTokensForFloat(
        address token,
        uint256 amountOfLP,
        uint256 amountOfFloat,
        uint256 currentPriceLP,
        uint256 withdrawal,
        bytes32 txid
    );

    modifier priceCheck() {
        uint256 beforePrice = getCurrentPriceLP();
        _;
        require(getCurrentPriceLP() >= beforePrice, "Invalid LPT price");
    }

    constructor(
        address _lpToken,
        address _btct,
        address _sbBTCPool,
        address _swapRewards,
        address _buybackAddress,
        uint256 _initBTCFloat,
        uint256 _initWBTCFloat
    ) {
        //set address for sbBTCpool
        sbBTCPool = _sbBTCPool;
        //set ISwapRewards
        sw = ISwapRewards(_swapRewards);
        // Set lpToken address
        lpToken = IBurnableToken(_lpToken);
        // Set initial lpDivisor of LP token
        lpDivisor = 10 ** IERC20(_lpToken).decimals();
        // Set BTCT address
        BTCT_ADDR = _btct;
        // Set convertScale
        convertScale = 10 ** (IERC20(_btct).decimals() - 8);
        // Set whitelist addresses
        whitelist[_btct] = true;
        whitelist[_lpToken] = true;
        whitelist[address(0)] = true;
        floatAmountOf[address(0)] = _initBTCFloat;
        floatAmountOf[BTCT_ADDR] = _initWBTCFloat;
        buybackAddress = _buybackAddress;
        withdrawalFeeBPS = 20;
        nodeRewardsRatio = 66;
        buybackRewardsRatio = 25;
    }

    /**
     * Transfer part
     */
    /// @dev singleTransferERC20 sends tokens from contract.
    /// @param _destToken The address of target token.
    /// @param _to The address of recipient.
    /// @param _amount The amount of tokens.
    /// @param _totalSwapped The amount of swap.
    /// @param _rewardsAmount The fees that should be paid.
    /// @param _redeemedFloatTxIds The txids which is for recording.
    function singleTransferERC20(
        address _destToken,
        address _to,
        uint256 _amount,
        uint256 _totalSwapped,
        uint256 _rewardsAmount,
        bytes32[] memory _redeemedFloatTxIds
    ) external override onlyOwner returns (bool) {
        require(whitelist[_destToken], "14"); //_destToken is not whitelisted
        require(
            _destToken != address(0),
            "15" //_destToken should not be address(0)
        );
        address _feesToken = address(0);
        if (_totalSwapped > 0) {
            sw.pullRewards(_destToken, _to, _totalSwapped);
            _swap(address(0), BTCT_ADDR, _totalSwapped);
        } else {
            _feesToken = (_destToken == address(lpToken))
                ? address(lpToken)
                : BTCT_ADDR;
        }
        _rewardsCollection(_feesToken, _rewardsAmount);
        _addUsedTxs(_redeemedFloatTxIds);
        _safeTransfer(_destToken, _to, _amount);
        return true;
    }

    /// @dev multiTransferERC20TightlyPacked sends tokens from contract.
    /// @param _destToken The address of target token.
    /// @param _addressesAndAmounts The address of recipient and amount.
    /// @param _totalSwapped The amount of swap.
    /// @param _rewardsAmount The fees that should be paid.
    /// @param _redeemedFloatTxIds The txids which is for recording.
    function multiTransferERC20TightlyPacked(
        address _destToken,
        bytes32[] memory _addressesAndAmounts,
        uint256 _totalSwapped,
        uint256 _rewardsAmount,
        bytes32[] memory _redeemedFloatTxIds
    ) external override onlyOwner returns (bool) {
        require(whitelist[_destToken], "_destToken is not whitelisted");
        require(
            _destToken != address(0),
            "_destToken should not be address(0)"
        );
        address _feesToken = address(0);
        if (_totalSwapped > 0) {
            _swap(address(0), BTCT_ADDR, _totalSwapped);
        } else {
            _feesToken = (_destToken == address(lpToken))
                ? address(lpToken)
                : BTCT_ADDR;
        }
        _rewardsCollection(_feesToken, _rewardsAmount);
        _addUsedTxs(_redeemedFloatTxIds);
        for (uint256 i = 0; i < _addressesAndAmounts.length; i++) {
            _safeTransfer(
                _destToken,
                address(uint160(uint256(_addressesAndAmounts[i]))),
                uint256(uint96(bytes12(_addressesAndAmounts[i])))
            );
        }
        return true;
    }

    /// @dev collectSwapFeesForBTC collects fees in the case of swap BTCT to BTC.
    /// @param _incomingAmount The spent amount. (BTCT)
    /// @param _minerFee The miner fees of BTC transaction.
    /// @param _rewardsAmount The fees that should be paid.
    function collectSwapFeesForBTC(
        uint256 _incomingAmount,
        uint256 _minerFee,
        uint256 _rewardsAmount,
        address[] memory _spenders,
        uint256[] memory _swapAmounts
    ) external override onlyOwner returns (bool) {
        address _feesToken = BTCT_ADDR;
        if (_incomingAmount > 0) {
            uint256 swapAmount = _incomingAmount.sub(_rewardsAmount);
            sw.pullRewardsMulti(address(0), _spenders, _swapAmounts);
            _swap(BTCT_ADDR, address(0), swapAmount);
        } else if (_incomingAmount == 0) {
            _feesToken = address(0);
        }
        _rewardsCollection(_feesToken, _rewardsAmount);
        return true;
    }

    /**
     * Float part
     */
    /// @dev recordIncomingFloat mints LP token.
    /// @param _token The address of target token.
    /// @param _addressesAndAmountOfFloat The address of recipient and amount.
    /// @param _txid The txids which is for recording.
    function recordIncomingFloat(
        address _token,
        bytes32 _addressesAndAmountOfFloat,
        bytes32 _txid
    ) external override onlyOwner priceCheck returns (bool) {
        require(whitelist[_token], "16"); //_token is invalid
        require(
            _issueLPTokensForFloat(_token, _addressesAndAmountOfFloat, _txid)
        );
        return true;
    }

    /// @dev recordOutcomingFloat burns LP token.
    /// @param _token The address of target token.
    /// @param _addressesAndAmountOfLPtoken The address of recipient and amount.
    /// @param _minerFee The miner fees of BTC transaction.
    /// @param _txid The txid which is for recording.
    function recordOutcomingFloat(
        address _token,
        bytes32 _addressesAndAmountOfLPtoken,
        uint256 _minerFee,
        bytes32 _txid
    ) external override onlyOwner priceCheck returns (bool) {
        require(whitelist[_token], "16"); //_token is invalid
        require(
            _burnLPTokensForFloat(
                _token,
                _addressesAndAmountOfLPtoken,
                _minerFee,
                _txid
            )
        );
        return true;
    }

    fallback() external {
        revert(); // reject all ETH
    }

    /**
     * Life cycle part
     */

    /// @dev recordUTXOSweepMinerFee reduces float amount by collected miner fees.
    /// @param _minerFee The miner fees of BTC transaction.
    /// @param _txid The txid which is for recording.
    function recordUTXOSweepMinerFee(
        uint256 _minerFee,
        bytes32 _txid
    ) public override onlyOwner returns (bool) {
        require(!isTxUsed(_txid), "The txid is already used");
        floatAmountOf[address(0)] = floatAmountOf[address(0)].sub(
            _minerFee,
            "12" //"BTC float amount insufficient"
        );
        _addUsedTx(_txid);
        return true;
    }

    /// @dev churn transfers contract ownership and set variables of the next TSS validator set.
    /// @param _newOwner The address of new Owner.
    /// @param _nodes The reward addresses.
    /// @param _isRemoved The flags to remove node.
    /// @param _churnedInCount The number of next party size of TSS group.
    /// @param _tssThreshold The number of next threshold.
    function churn(
        address _newOwner,
        address[] memory _nodes,
        bool[] memory _isRemoved,
        uint8 _churnedInCount,
        uint8 _tssThreshold
    ) external override onlyOwner returns (bool) {
        require(
            _tssThreshold >= tssThreshold && _tssThreshold <= 2 ** 8 - 1,
            "01" //"_tssThreshold should be >= tssThreshold"
        );
        require(
            _churnedInCount >= _tssThreshold + uint8(1),
            "02" //"n should be >= t+1"
        );
        require(
            _nodes.length == _isRemoved.length,
            "05" //"_nodes and _isRemoved length is not match"
        );

        transferOwnership(_newOwner);
        // Update active node list
        for (uint256 i = 0; i < _nodes.length; i++) {
            if (!_isRemoved[i]) {
                if (nodes[_nodes[i]] == uint8(0)) {
                    nodeAddrs.push(_nodes[i]);
                }
                if (nodes[_nodes[i]] != uint8(1)) {
                    activeNodeCount++;
                }
                nodes[_nodes[i]] = uint8(1);
            } else {
                activeNodeCount--;
                nodes[_nodes[i]] = uint8(2);
            }
        }
        require(activeNodeCount <= 100, "Stored node size should be <= 100");
        churnedInCount = _churnedInCount;
        tssThreshold = _tssThreshold;
        return true;
    }

    /// @dev updateParams changes contract params.
    /// @param _sbBTCPool The address of new sbBTCPool.
    /// @param _buybackAddress The address of new buyback.
    /// @param _withdrawalFeeBPS The number of next withdarw fees.
    /// @param _nodeRewardsRatio The number of next node rewards ratio.
    /// @param _buybackRewardsRatio The number of next buyback rewards ratio.
    function updateParams(
        address _sbBTCPool,
        address _buybackAddress,
        uint256 _withdrawalFeeBPS,
        uint256 _nodeRewardsRatio,
        uint256 _buybackRewardsRatio
    ) external override onlyOwner returns (bool) {
        sbBTCPool = _sbBTCPool;
        buybackAddress = _buybackAddress;
        withdrawalFeeBPS = _withdrawalFeeBPS;
        nodeRewardsRatio = _nodeRewardsRatio;
        buybackRewardsRatio = _buybackRewardsRatio;
        return true;
    }

    /// @dev isTxUsed sends rewards for Nodes.
    /// @param _txid The txid which is for recording.
    function isTxUsed(bytes32 _txid) public view override returns (bool) {
        return used[_txid];
    }

    /// @dev getCurrentPriceLP returns the current exchange rate of LP token.
    function getCurrentPriceLP()
        public
        view
        override
        returns (uint256 nowPrice)
    {
        (uint256 reserveA, uint256 reserveB) = getFloatReserve(
            address(0),
            BTCT_ADDR
        );
        uint256 totalLPs = lpToken.totalSupply();
        // decimals of totalReserved == 8, lpDivisor == 8, decimals of rate == 8
        nowPrice = totalLPs == 0
            ? lpDivisor
            : (reserveA.add(reserveB)).mul(lpDivisor).div(totalLPs);
        return nowPrice;
    }

    /// @dev getFloatReserve returns float reserves
    /// @param _tokenA The address of target tokenA.
    /// @param _tokenB The address of target tokenB.
    function getFloatReserve(
        address _tokenA,
        address _tokenB
    ) public view override returns (uint256 reserveA, uint256 reserveB) {
        (reserveA, reserveB) = (floatAmountOf[_tokenA], floatAmountOf[_tokenB]);
    }

    /// @dev getActiveNodes returns active nodes list
    function getActiveNodes() public view override returns (address[] memory) {
        uint256 count = 0;
        address[] memory _nodes = new address[](activeNodeCount);
        for (uint256 i = 0; i < nodeAddrs.length; i++) {
            if (nodes[nodeAddrs[i]] == uint8(1)) {
                _nodes[count] = nodeAddrs[i];
                count++;
            }
        }
        return _nodes;
    }

    /// @dev isNodeSake returns true if the node is churned in
    function isNodeStake(address _user) public view override returns (bool) {
        if (nodes[_user] == uint8(1)) {
            return true;
        }
        return false;
    }

    /// @dev _issueLPTokensForFloat
    /// @param _token The address of target token.
    /// @param _transaction The recevier address and amount.
    /// @param _txid The txid which is for recording.
    function _issueLPTokensForFloat(
        address _token,
        bytes32 _transaction,
        bytes32 _txid
    ) internal returns (bool) {
        require(!isTxUsed(_txid), "06"); //"The txid is already used");
        require(_transaction != 0x0, "07"); //"The transaction is not valid");
        // Define target address which is recorded on the tx data (20 bytes)
        // Define amountOfFloat which is recorded top on tx data (12 bytes)
        (address to, uint256 amountOfFloat) = _splitToValues(_transaction);
        // Calculate the amount of LP token
        uint256 nowPrice = getCurrentPriceLP();
        uint256 amountOfLP = amountOfFloat.mul(lpDivisor).div(nowPrice);
        // Send LP tokens to LP
        lpToken.mint(to, amountOfLP);
        // Add float amount
        _addFloat(_token, amountOfFloat);
        _addUsedTx(_txid);

        emit IssueLPTokensForFloat(
            to,
            amountOfFloat,
            amountOfLP,
            nowPrice,
            0,
            _txid
        );
        return true;
    }

    /// @dev _burnLPTokensForFloat
    /// @param _token The address of target token.
    /// @param _transaction The address of sender and amount.
    /// @param _minerFee The miner fees of BTC transaction.
    /// @param _txid The txid which is for recording.
    function _burnLPTokensForFloat(
        address _token,
        bytes32 _transaction,
        uint256 _minerFee,
        bytes32 _txid
    ) internal returns (bool) {
        require(!isTxUsed(_txid), "06"); //"The txid is already used");
        require(_transaction != 0x0, "07"); //"The transaction is not valid");
        // Define target address which is recorded on the tx data (20bytes)
        // Define amountLP which is recorded top on tx data (12bytes)
        (address to, uint256 amountOfLP) = _splitToValues(_transaction);
        // Calculate the amount of LP token
        uint256 nowPrice = getCurrentPriceLP();
        // Calculate the amountOfFloat
        uint256 amountOfFloat = amountOfLP.mul(nowPrice).div(lpDivisor);
        uint256 withdrawalFees = amountOfFloat.mul(withdrawalFeeBPS).div(10000);
        require(
            amountOfFloat.sub(withdrawalFees) >= _minerFee,
            "09" //"Error: amountOfFloat.sub(withdrawalFees) < _minerFee"
        );
        uint256 withdrawal = amountOfFloat.sub(withdrawalFees).sub(_minerFee);
        (uint256 reserveA, uint256 reserveB) = getFloatReserve(
            address(0),
            BTCT_ADDR
        );
        if (_token == address(0)) {
            require(
                reserveA >= amountOfFloat.sub(withdrawalFees),
                "08" //"The float balance insufficient."
            );
        } else if (_token == BTCT_ADDR) {
            require(
                reserveB >= amountOfFloat.sub(withdrawalFees),
                "12" //"BTC float amount insufficient"
            );
        }
        // Collect fees before remove float
        _rewardsCollection(_token, withdrawalFees);
        // Remove float amount
        _removeFloat(_token, amountOfFloat);
        // Add txid for recording.
        _addUsedTx(_txid);
        // BTCT transfer if token address is BTCT_ADDR
        if (_token == BTCT_ADDR) {
            // _minerFee should be zero
            _safeTransfer(_token, to, withdrawal);
        }
        // Burn LP tokens
        require(lpToken.burn(amountOfLP));
        emit BurnLPTokensForFloat(
            to,
            amountOfLP,
            amountOfFloat,
            nowPrice,
            withdrawal,
            _txid
        );
        return true;
    }

    /// @dev _addFloat updates one side of the float.
    /// @param _token The address of target token.
    /// @param _amount The amount of float.
    function _addFloat(address _token, uint256 _amount) internal {
        floatAmountOf[_token] = floatAmountOf[_token].add(_amount);
    }

    /// @dev _removeFloat remove one side of the float - redone for skypools using tokens mapping
    /// @param _token The address of target token.
    /// @param _amount The amount of float.
    function _removeFloat(address _token, uint256 _amount) internal {
        floatAmountOf[_token] = floatAmountOf[_token].sub(
            _amount,
            "10" //"_removeFloat: float amount insufficient"
        );
    }

    /// @dev _swap collects swap amount to change float.
    /// @param _sourceToken The address of source token
    /// @param _destToken The address of target token.
    /// @param _swapAmount The amount of swap.
    function _swap(
        address _sourceToken,
        address _destToken,
        uint256 _swapAmount
    ) internal {
        floatAmountOf[_destToken] = floatAmountOf[_destToken].sub(
            _swapAmount,
            "11" //"_swap: float amount insufficient"
        );
        floatAmountOf[_sourceToken] = floatAmountOf[_sourceToken].add(
            _swapAmount
        );

        emit Swap(_sourceToken, _destToken, _swapAmount);
    }

    /// @dev _safeTransfer executes tranfer erc20 tokens
    /// @param _token The address of target token
    /// @param _to The address of receiver.
    /// @param _amount The amount of transfer.
    function _safeTransfer(
        address _token,
        address _to,
        uint256 _amount
    ) internal {
        if (_token == BTCT_ADDR) {
            _amount = _amount.mul(convertScale);
        }
        IERC20(_token).safeTransfer(_to, _amount);
    }

    /// @dev _rewardsCollection collects tx rewards.
    /// @param _feesToken The token address for collection fees.
    /// @param _rewardsAmount The amount of rewards.
    function _rewardsCollection(
        address _feesToken,
        uint256 _rewardsAmount
    ) internal {
        if (_rewardsAmount == 0) return;
        // if (_feesToken == lpToken) {
        //     IBurnableToken(lpToken).transfer(sbBTCPool, _rewardsAmount);
        //     emit RewardsCollection(_feesToken, 0, _rewardsAmount, 0);
        //     return;
        // }

        // Get current LP token price.
        uint256 nowPrice = getCurrentPriceLP();
        // Add all fees into pool
        floatAmountOf[_feesToken] = floatAmountOf[_feesToken].add(
            _rewardsAmount
        );
        uint256 feesTotal = _rewardsAmount.mul(nodeRewardsRatio).div(100);
        // Alloc LP tokens for nodes as fees
        uint256 feesLPTTotal = feesTotal.mul(lpDivisor).div(nowPrice);
        // Alloc Buyback tokens for nodes as fees
        uint256 feesBuyback = feesLPTTotal.mul(buybackRewardsRatio).div(100);
        // Mints LP tokens for Nodes
        lpToken.mint(sbBTCPool, feesLPTTotal.sub(feesBuyback));
        lpToken.mint(buybackAddress, feesBuyback);

        emit RewardsCollection(
            _feesToken,
            _rewardsAmount,
            feesLPTTotal,
            nowPrice
        );
    }

    /// @dev _addUsedTx updates txid list which is spent. (single hash)
    /// @param _txid The array of txid.
    function _addUsedTx(bytes32 _txid) internal {
        used[_txid] = true;
    }

    /// @dev _addUsedTxs updates txid list which is spent. (multiple hashes)
    /// @param _txids The array of txid.
    function _addUsedTxs(bytes32[] memory _txids) internal {
        for (uint256 i = 0; i < _txids.length; i++) {
            used[_txids[i]] = true;
        }
    }

    /// @dev _splitToValues returns address and amount of staked SWINGBYs
    /// @param _data The info of a staker.
    function _splitToValues(
        bytes32 _data
    ) internal pure returns (address, uint256) {
        return (
            address(uint160(uint256(_data))),
            uint256(uint96(bytes12(_data)))
        );
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.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 Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

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

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

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

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

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @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 a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * 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) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

import "./IERC20.sol";

interface IBurnableToken is IERC20 {
    function mint(address target, uint256 amount) external returns (bool);

    function burn(uint256 amount) external returns (bool);

    function mintable() external returns (bool);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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

    /**
     * @dev Returns the token decimals.
     */
    function decimals() external view returns (uint8);

    /**
     * @dev Returns the token symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the token name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the bep token owner. (This is a BEP-20 token specific.)
     */
    function getOwner() external view returns (address);

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

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

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

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

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

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

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

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;
pragma experimental ABIEncoderV2;

import "./IBurnableToken.sol";

interface ISwapContract {
    function BTCT_ADDR() external returns (address);

    function lpToken() external returns (IBurnableToken);

    function singleTransferERC20(
        address _destToken,
        address _to,
        uint256 _amount,
        uint256 _totalSwapped,
        uint256 _rewardsAmount,
        bytes32[] memory _redeemedFloatTxIds
    ) external returns (bool);

    function multiTransferERC20TightlyPacked(
        address _destToken,
        bytes32[] memory _addressesAndAmounts,
        uint256 _totalSwapped,
        uint256 _rewardsAmount,
        bytes32[] memory _redeemedFloatTxIds
    ) external returns (bool);

    function collectSwapFeesForBTC(
        uint256 _incomingAmount,
        uint256 _minerFee,
        uint256 _rewardsAmount,
        address[] memory _spenders,
        uint256[] memory _swapAmounts
    ) external returns (bool);

    function recordIncomingFloat(
        address _token,
        bytes32 _addressesAndAmountOfFloat,
        bytes32 _txid
    ) external returns (bool);

    function recordOutcomingFloat(
        address _token,
        bytes32 _addressesAndAmountOfLPtoken,
        uint256 _minerFee,
        bytes32 _txid
    ) external returns (bool);

    function recordUTXOSweepMinerFee(
        uint256 _minerFee,
        bytes32 _txid
    ) external returns (bool);

    function churn(
        address _newOwner,
        address[] memory _nodes,
        bool[] memory _isRemoved,
        uint8 _churnedInCount,
        uint8 _tssThreshold
    ) external returns (bool);

    function updateParams(
        address _sbBTCPool,
        address _buybackAddress,
        uint256 _withdrawalFeeBPS,
        uint256 _nodeRewardsRatio,
        uint256 _buybackRewardsRatio
    ) external returns (bool);

    function isTxUsed(bytes32 _txid) external view returns (bool);

    function getCurrentPriceLP() external view returns (uint256);

    function getFloatReserve(
        address _tokenA,
        address _tokenB
    ) external returns (uint256 reserveA, uint256 reserveB);

    function getActiveNodes() external view returns (address[] memory);

    function isNodeStake(address _user) external returns (bool);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

interface ISwapRewards {

    function setSWINGBYPrice(uint256 _pricePerBTC) external;

    function pullRewards(address _dest, address _receiver, uint256 _swapped) external returns (bool);

    function pullRewardsMulti(address _dest, address[] memory _receiver, uint256[] memory _swapped) external returns (bool);
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.0;

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

        uint256 size;
        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 Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

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

        (bool success, bytes memory returndata) = target.delegatecall(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);
            }
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "./Address.sol";

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

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

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

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

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + 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(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

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

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_txid","type":"bytes32"}],"name":"isTxUsed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lpToken","outputs":[{"internalType":"contract IBurnableToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_destToken","type":"address"},{"internalType":"bytes32[]","name":"_addressesAndAmounts","type":"bytes32[]"},{"internalType":"uint256","name":"_totalSwapped","type":"uint256"},{"internalType":"uint256","name":"_rewardsAmount","type":"uint256"},{"internalType":"bytes32[]","name":"_redeemedFloatTxIds","type":"bytes32[]"}],"name":"multiTransferERC20TightlyPacked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"nodeRewardsRatio","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"bytes32","name":"_addressesAndAmountOfFloat","type":"bytes32"},{"internalType":"bytes32","name":"_txid","type":"bytes32"}],"name":"recordIncomingFloat","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"bytes32","name":"_addressesAndAmountOfLPtoken","type":"bytes32"},{"internalType":"uint256","name":"_minerFee","type":"uint256"},{"internalType":"bytes32","name":"_txid","type":"bytes32"}],"name":"recordOutcomingFloat","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_minerFee","type":"uint256"},{"internalType":"bytes32","name":"_txid","type":"bytes32"}],"name":"recordUTXOSweepMinerFee","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sbBTCPool","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_destToken","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"uint256","name":"_totalSwapped","type":"uint256"},{"internalType":"uint256","name":"_rewardsAmount","type":"uint256"},{"internalType":"bytes32[]","name":"_redeemedFloatTxIds","type":"bytes32[]"}],"name":"singleTransferERC20","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sw","outputs":[{"internalType":"contract ISwapRewards","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tssThreshold","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_sbBTCPool","type":"address"},{"internalType":"address","name":"_buybackAddress","type":"address"},{"internalType":"uint256","name":"_withdrawalFeeBPS","type":"uint256"},{"internalType":"uint256","name":"_nodeRewardsRatio","type":"uint256"},{"internalType":"uint256","name":"_buybackRewardsRatio","type":"uint256"}],"name":"updateParams","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelist","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawalFeeBPS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000679199877e56b8e68fdb1ddae122e843ecaca2680000000000000000000000002260fac5e5542a773aa44fbcfedf7c193bc2c599000000000000000000000000d81a368a9606e09ad7877116536706d256fe76650000000000000000000000002a3040d8b2a4ea8d3c36c04ae2affb9c5a8e856d0000000000000000000000006f1e586c62f7d8a1b7394f1a81a75aa68e1093650000000000000000000000000000000000000000000000000000000001f661ef000000000000000000000000000000000000000000000000000000000506e72d

-----Decoded View---------------
Arg [0] : _lpToken (address): 0x679199877E56b8E68Fdb1dDaE122E843EcAcA268
Arg [1] : _btct (address): 0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599
Arg [2] : _sbBTCPool (address): 0xD81a368A9606E09ad7877116536706D256fe7665
Arg [3] : _swapRewards (address): 0x2a3040D8B2a4ea8d3C36c04AE2affB9c5a8e856d
Arg [4] : _buybackAddress (address): 0x6f1e586C62F7d8A1B7394F1a81a75AA68E109365
Arg [5] : _initBTCFloat (uint256): 32924143
Arg [6] : _initWBTCFloat (uint256): 84338477

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000679199877e56b8e68fdb1ddae122e843ecaca268
Arg [1] : 0000000000000000000000002260fac5e5542a773aa44fbcfedf7c193bc2c599
Arg [2] : 000000000000000000000000d81a368a9606e09ad7877116536706d256fe7665
Arg [3] : 0000000000000000000000002a3040d8b2a4ea8d3c36c04ae2affb9c5a8e856d
Arg [4] : 0000000000000000000000006f1e586c62f7d8a1b7394f1a81a75aa68e109365
Arg [5] : 0000000000000000000000000000000000000000000000000000000001f661ef
Arg [6] : 000000000000000000000000000000000000000000000000000000000506e72d