Contract 0x8d24EF5B84d99b1871Eef84b4999b97B96eCfba7

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;

import "Initializable.sol";
import "IERC20.sol";

import "WithdrawalQueue.sol";
import "ILido.sol";

contract Withdrawal is Initializable {
    using WithdrawalQueue for WithdrawalQueue.Queue;

    // Element removed from queue
    event ElementRemoved(uint256 elementId);

    // Element added to queue
    event ElementAdded(uint256 elementId);

    // New redeem request added
    event RedeemRequestAdded(address indexed user, uint256 shares, uint256 batchId);

    // xcKSM claimed by user
    event Claimed(address indexed user, uint256 claimedAmount);

    // Losses ditributed to contract
    event LossesDistributed(uint256 losses);

    // stKSM smart contract
    ILido public stKSM;

    // xcKSM precompile
    IERC20 public xcKSM;

    // withdrawal queue
    WithdrawalQueue.Queue public queue;

    // batch id => price for pool shares to xcKSM 
    // to retrive xcKSM amount for user: user_pool_shares * batchSharePrice[batch_id]
    mapping(uint256 => uint256) public batchSharePrice;

    struct Request {
        uint256 share;
        uint256 batchId;
    }

    // user's withdrawal requests (unclaimed)
    mapping(address => Request[]) public userRequests;

    // total virtual xcKSM amount on contract
    uint256 public totalVirtualXcKSMAmount;

    // total amount of xcKSM pool shares
    uint256 public totalXcKSMPoolShares;

    // stKSM(xcKSM) virtual amount for batch
    uint256 public batchVirtualXcKSMAmount;

    // Last Id of queue element which can be claimed
    uint256 public claimableId;

    // Balance for claiming
    uint256 public pendingForClaiming;

    // max amount of requests in parallel
    uint16 internal constant MAX_REQUESTS = 20;


    modifier onlyLido() {
        require(msg.sender == address(stKSM), "WITHDRAWAL: CALLER_NOT_LIDO");
        _;
    }

    /**
    * @notice Initialize redeemPool contract.
    * @param _cap - cap for queue
    * @param _xcKSM - xcKSM precompile address
    */
    function initialize(
        uint256 _cap,
        address _xcKSM
    ) external initializer {
        require(_cap > 0, "WITHDRAWAL: INCORRECT_CAP");
        require(_xcKSM != address(0), "WITHDRAWAL: INCORRECT_XCKSM_ADDRESS");
        queue.init(_cap);
        xcKSM = IERC20(_xcKSM);
    }

    /**
    * @notice Set stKSM contract address, allowed to only once
    * @param _stKSM stKSM contract address
    */
    function setStKSM(address _stKSM) external {
        require(address(stKSM) == address(0), "WITHDRAWAL: STKSM_ALREADY_DEFINED");
        require(_stKSM != address(0), "WITHDRAWAL: INCORRECT_STKSM_ADDRESS");

        stKSM = ILido(_stKSM);
    }

    /**
    * @notice Burn pool shares from first element of queue and move index for allow claiming. After that add new batch
    */
    function newEra() external onlyLido {
        uint256 newXcKSMAmount = xcKSM.balanceOf(address(this)) - pendingForClaiming;

        if ((newXcKSMAmount > 0) && (queue.size > 0)) {
            (WithdrawalQueue.Batch memory topBatch, uint256 topId) = queue.top();
            // batchSharePrice = pool_xcKSM_balance / pool_shares
            // when user try to claim: user_KSM = user_pool_share * batchSharePrice
            uint256 sharePriceForBatch = getBatchSharePrice(topBatch);
            uint256 xcKSMForBatch = topBatch.batchTotalShares * sharePriceForBatch / 10**12;
            if (newXcKSMAmount >= xcKSMForBatch) {
                batchSharePrice[topId] = sharePriceForBatch;

                totalXcKSMPoolShares -= topBatch.batchXcKSMShares;
                totalVirtualXcKSMAmount -= xcKSMForBatch;
                // NOTE: In case when losses occur due to rounding it is possible to 
                // totalVirtualXcKSMAmount > 0 and totalXcKSMPoolShares = 0
                if (totalXcKSMPoolShares == 0) {
                    totalVirtualXcKSMAmount = 0;
                }

                claimableId = topId;
                pendingForClaiming += xcKSMForBatch;

                queue.pop();

                emit ElementRemoved(topId);
            }
        }

        if ((batchVirtualXcKSMAmount > 0) && (queue.size < queue.cap)) {
            uint256 batchKSMPoolShares = getKSMPoolShares(batchVirtualXcKSMAmount);

            // NOTE: batch total shares = batch xcKSM amount, because 1 share = 1 xcKSM
            WithdrawalQueue.Batch memory newBatch = WithdrawalQueue.Batch(batchVirtualXcKSMAmount, batchKSMPoolShares);
            uint256 newId = queue.push(newBatch);

            totalVirtualXcKSMAmount += batchVirtualXcKSMAmount;
            totalXcKSMPoolShares += batchKSMPoolShares;

            batchVirtualXcKSMAmount = 0;

            emit ElementAdded(newId);
        }
    }

    /**
    * @notice Returns total virtual xcKSM balance of contract for which losses can be applied
    */
    function totalBalanceForLosses() external view returns (uint256) {
        return totalVirtualXcKSMAmount + batchVirtualXcKSMAmount;
    }

    /**
    * @notice function returns xcKSM amount that should be available for claiming after batch remove
    * @param _batchShift batch shift from first element
    */
    function getxcKSMBalanceForBatch(uint256 _batchShift) external view returns (uint256) {
        (WithdrawalQueue.Batch memory specificBatch, ) = queue.element(_batchShift);
        // batchSharePrice = pool_xcKSM_balance / pool_shares
        // when user try to claim: user_KSM = user_pool_share * batchSharePrice
        uint256 sharePriceForBatch = getBatchSharePrice(specificBatch);
        uint256 xcKSMForBatch = specificBatch.batchTotalShares * sharePriceForBatch / 10**12;
        return xcKSMForBatch;
    }

    /**
    * @notice function returns specific batch from queue
    * @param _batchShift batch shift from first element
    */
    function getQueueBatch(uint256 _batchShift) external view returns (WithdrawalQueue.Batch memory) {
        (WithdrawalQueue.Batch memory specificBatch, ) = queue.element(_batchShift);
        return specificBatch;
    }

    /**
    * @notice 1. Mint equal amount of pool shares for user 
    * @notice 2. Adjust current amount of virtual xcKSM on Withdrawal contract
    * @notice 3. Burn shares on LIDO side
    * @param _from user address for minting
    * @param _amount amount of stKSM which user wants to redeem
    */
    function redeem(address _from, uint256 _amount) external onlyLido {
        // NOTE: user share in batch = user stKSM balance in specific batch
        require(userRequests[_from].length < MAX_REQUESTS, "WITHDRAWAL: REQUEST_CAP_EXCEEDED");
        batchVirtualXcKSMAmount += _amount;

        Request memory req = Request(_amount, queue.nextId());
        userRequests[_from].push(req);

        emit RedeemRequestAdded(_from, req.share, req.batchId);
    }

    /**
    * @notice Returns available for claiming xcKSM amount for user
    * @param _holder user address for claiming
    */
    function claim(address _holder) external onlyLido returns (uint256) {
        // go through claims and check if unlocked than just transfer xcKSMs
        uint256 readyToClaim = 0;
        uint256 readyToClaimCount = 0;
        Request[] storage requests = userRequests[_holder];

        for (uint256 i = 0; i < requests.length; ++i) {
            if (requests[i].batchId <= claimableId) {
                readyToClaim += requests[i].share * batchSharePrice[requests[i].batchId] / 10**12;
                readyToClaimCount += 1;
            }
            else {
                requests[i - readyToClaimCount] = requests[i];
            }
        }

        // remove claimed items
        for (uint256 i = 0; i < readyToClaimCount; ++i) { requests.pop(); }

        require(readyToClaim <= xcKSM.balanceOf(address(this)), "WITHDRAWAL: CLAIM_EXCEEDS_BALANCE");
        xcKSM.transfer(_holder, readyToClaim);
        pendingForClaiming -= readyToClaim;

        emit Claimed(_holder, readyToClaim);

        return readyToClaim;
    }

    /**
    * @notice Apply losses to current stKSM shares on this contract
    * @param _losses user address for claiming
    */
    function ditributeLosses(uint256 _losses) external onlyLido {
        totalVirtualXcKSMAmount -= _losses;
        emit LossesDistributed(_losses);
    }

    /**
    * @notice Check available for claim xcKSM balance for user
    * @param _holder user address
    */
    function getRedeemStatus(address _holder) external view returns(uint256 _waiting, uint256 _available) {
        Request[] storage requests = userRequests[_holder];

        for (uint256 i = 0; i < requests.length; ++i) {
            if (requests[i].batchId <= claimableId) {
                _available += requests[i].share * batchSharePrice[requests[i].batchId] / 10**12;
            }
            else {
                _waiting += requests[i].share * getBatchSharePrice(queue.findBatch(requests[i].batchId)) / 10**12;
            }
        }
        return (_waiting, _available);
    }

    /**
    * @notice Calculate share price to KSM for specific batch
    * @param _batch batch
    */
    function getBatchSharePrice(WithdrawalQueue.Batch memory _batch) internal view returns (uint256) {
        uint256 batchKSMPrice;
        if (totalXcKSMPoolShares > 0) {
            // user_xcKSM = user_batch_share * batch_share_price
            // batch_share_price = (1 / batch_total_shares) * batch_pool_shares * (total_xcKSM / total_pool_shares)
            if (_batch.batchTotalShares > 0) {
                batchKSMPrice = (10**12 * _batch.batchXcKSMShares * totalVirtualXcKSMAmount) / 
                                (_batch.batchTotalShares * totalXcKSMPoolShares);
            }
            else {
                // NOTE: This means that batch not added to queue currently
                if (batchVirtualXcKSMAmount > 0) {
                    batchKSMPrice = (10**12 * getKSMPoolShares(batchVirtualXcKSMAmount) * totalVirtualXcKSMAmount) / 
                                    (batchVirtualXcKSMAmount * totalXcKSMPoolShares);
                }
            }
        }
        else {
            // NOTE: This means that we have only one batch that no in the pool (batch share price == 10**12)
            if (batchVirtualXcKSMAmount > 0) {
                batchKSMPrice = 10**12;
            }
        }
        return batchKSMPrice;
    }

    /**
    * @notice Calculate shares amount in KSM pool for specific xcKSM amount
    * @param _amount amount of xcKSM tokens
    */
    function getKSMPoolShares(uint256 _amount) internal view returns (uint256) {
        if (totalVirtualXcKSMAmount > 0) {
            return _amount * totalXcKSMPoolShares / totalVirtualXcKSMAmount;
        }
        return _amount;
    }
}

// SPDX-License-Identifier: MIT

// solhint-disable-next-line compiler-version
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;
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;

library WithdrawalQueue {
    struct Batch {
        uint256 batchTotalShares; // Total shares amount for batch
        uint256 batchXcKSMShares; // Batch xcKSM shares in xcKSM pool
    }

    struct Queue {
        Batch[] items;
        uint256[] ids;

        uint256 first;
        uint256 size;
        uint256 cap;
        uint256 id;
    }

    /**
    * @notice Queue initialization
    * @param queue queue for initializing
    * @param cap max amount of elements in the queue
    */
    function init(Queue storage queue, uint256 cap) internal {
        for (uint256 i = 0; i < cap; ++i) {
            queue.items.push(Batch(0, 0));
        }
        queue.ids = new uint256[](cap);
        queue.first = 0;
        queue.size = 0;
        queue.size = 0;
        queue.cap = cap;
    }

    /**
    * @notice Add element to the end of queue
    * @param queue current queue
    * @param elem element for adding
    */
    function push(Queue storage queue, Batch memory elem) internal returns (uint256 _id) {
        require(queue.size < queue.cap, "WithdrawalQueue: capacity exceeded");
        uint256 lastIndex = (queue.first + queue.size) % queue.cap;
        queue.items[lastIndex] = elem;
        queue.id++;
        queue.ids[lastIndex] = queue.id;
        queue.size++;
        return queue.id;
    }

    /**
    * @notice Remove element from top of the queue
    * @param queue current queue
    */
    function pop(Queue storage queue) internal returns (Batch memory _item, uint256 _id) {
        require(queue.size > 0, "WithdrawalQueue: queue is empty");
        _item = queue.items[queue.first];
        _id = queue.ids[queue.first];
        queue.first = (queue.first + 1) % queue.cap;
        queue.size--;
    }

    /**
    * @notice Return batch for specific index
    * @param queue current queue
    * @param index index of batch
    */
    function findBatch(Queue storage queue, uint256 index) internal view returns (Batch memory _item) {
        uint256 startIndex = queue.ids[queue.first];
        if (index >= startIndex) {
            if ((index - startIndex) < queue.size) {
                return queue.items[(queue.first + (index - startIndex)) % queue.cap];
            }
        }
        return Batch(0, 0);
    }

    /**
    * @notice Return first element of the queue
    * @param queue current queue
    */
    function top(Queue storage queue) internal view returns (Batch memory _item, uint256 _id) {
        require(queue.size > 0, "WithdrawalQueue: queue is empty");
        _item = queue.items[queue.first];
        _id = queue.ids[queue.first];
    }

    /**
    * @notice Return specific element of the queue
    * @param queue current queue
    * @param shift element shift from top id
    */
    function element(Queue storage queue, uint256 shift) internal view returns (Batch memory _item, uint256 _id) {
        require(queue.size > 0, "WithdrawalQueue: queue is empty");
        require(shift < queue.size, "WithdrawalQueue: index outside queue");
        uint256 index = (queue.first + shift) % queue.cap;
        _item = queue.items[index];
        _id = queue.ids[index];
    }

    /**
    * @notice Return last element of the queue
    * @param queue current queue
    */
    function last(Queue storage queue) internal view returns (Batch memory _item, uint256 _id) {
        require(queue.size > 0, "WithdrawalQueue: queue is empty");
        uint256 lastIndex = (queue.first + queue.size - 1) % queue.cap;
        _item = queue.items[lastIndex];
        _id = queue.ids[lastIndex];
    }

    /**
    * @notice Return last element id + 1
    * @param queue current queue
    */
    function nextId(Queue storage queue) internal view returns (uint256 _id) {
        _id = queue.id + 1;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "Types.sol";

interface ILido {
    function MAX_ALLOWABLE_DIFFERENCE() external view returns(uint128);

    function deposit(uint256 amount) external returns (uint256);

    function distributeRewards(uint256 totalRewards, uint256 ledgerBalance) external;

    function distributeLosses(uint256 totalLosses, uint256 ledgerBalance) external;

    function getStashAccounts() external view returns (bytes32[] memory);

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

    function ledgerStake(address ledger) external view returns (uint256);

    function transferFromLedger(uint256 amount, uint256 excess) external;

    function transferFromLedger(uint256 amount) external;

    function transferToLedger(uint256 amount) external;

    function flushStakes() external;

    function findLedger(bytes32 stash) external view returns (address);

    function AUTH_MANAGER() external returns(address);

    function ORACLE_MASTER() external view returns (address);

    function getPooledKSMByShares(uint256 sharesAmount) external view returns (uint256);

    function getSharesByPooledKSM(uint256 amount) external view returns (uint256);

    function transfer(address recipient, uint256 amount) external returns (bool);

    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface Types {
    struct Fee{
        uint16 total;
        uint16 operators;
        uint16 developers;
        uint16 treasury;
    }

    struct Stash {
        bytes32 stashAccount;
        uint64  eraId;
    }

    enum LedgerStatus {
        // bonded but not participate in staking
        Idle,
        // participate as nominator
        Nominator,
        // participate as validator
        Validator,
        // not bonded not participate in staking
        None
    }

    struct UnlockingChunk {
        uint128 balance;
        uint64 era;
    }

    struct OracleData {
        bytes32 stashAccount;
        bytes32 controllerAccount;
        LedgerStatus stakeStatus;
        // active part of stash balance
        uint128 activeBalance;
        // locked for stake stash balance.
        uint128 totalBalance;
        // totalBalance = activeBalance + sum(unlocked.balance)
        UnlockingChunk[] unlocking;
        uint32[] claimedRewards;
        // stash account balance. It includes locked (totalBalance) balance assigned
        // to a controller.
        uint128 stashBalance;
        // slashing spans for ledger
        uint32 slashingSpans;
    }

    struct RelaySpec {
        uint16 maxValidatorsPerLedger;
        uint128 minNominatorBalance;
        uint128 ledgerMinimumActiveBalance;
        uint256 maxUnlockingChunks;
    }
}

{
  "evmVersion": "istanbul",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {
    "Withdrawal.sol": {}
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"claimedAmount","type":"uint256"}],"name":"Claimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"elementId","type":"uint256"}],"name":"ElementAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"elementId","type":"uint256"}],"name":"ElementRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"losses","type":"uint256"}],"name":"LossesDistributed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"shares","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"batchId","type":"uint256"}],"name":"RedeemRequestAdded","type":"event"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"batchSharePrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"batchVirtualXcKSMAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_holder","type":"address"}],"name":"claim","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"claimableId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_losses","type":"uint256"}],"name":"ditributeLosses","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_batchShift","type":"uint256"}],"name":"getQueueBatch","outputs":[{"components":[{"internalType":"uint256","name":"batchTotalShares","type":"uint256"},{"internalType":"uint256","name":"batchXcKSMShares","type":"uint256"}],"internalType":"struct WithdrawalQueue.Batch","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_holder","type":"address"}],"name":"getRedeemStatus","outputs":[{"internalType":"uint256","name":"_waiting","type":"uint256"},{"internalType":"uint256","name":"_available","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_batchShift","type":"uint256"}],"name":"getxcKSMBalanceForBatch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_cap","type":"uint256"},{"internalType":"address","name":"_xcKSM","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"newEra","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"pendingForClaiming","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"queue","outputs":[{"internalType":"uint256","name":"first","type":"uint256"},{"internalType":"uint256","name":"size","type":"uint256"},{"internalType":"uint256","name":"cap","type":"uint256"},{"internalType":"uint256","name":"id","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"redeem","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_stKSM","type":"address"}],"name":"setStKSM","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stKSM","outputs":[{"internalType":"contract ILido","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalBalanceForLosses","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalVirtualXcKSMAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalXcKSMPoolShares","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"userRequests","outputs":[{"internalType":"uint256","name":"share","type":"uint256"},{"internalType":"uint256","name":"batchId","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"xcKSM","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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