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/*
 * Electra-compatible batch validator deposit contract.
 * 
 * Based on the Abyss ETH2 depositor.
 */

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Pausable.sol";
import "../contracts/interfaces/IDepositContract.sol";

contract BatchValidatorDepositor is Pausable, Ownable {

    /**
     * @dev Eth2 Deposit Contract address.
     */
    IDepositContract public depositContract;

    /**
     * @dev Minimal and maximum amount of nodes per transaction.
     */
    uint256 public constant nodesMinAmount = 1;
    uint256 public constant nodesMaxAmount = 100;
    uint256 public constant pubkeyLength = 48;
    uint256 public constant credentialsLength = 32;
    uint256 public constant signatureLength = 96;

    /**
     * @dev Setting Eth2 Smart Contract address during construction.
     */
    constructor(bool mainnet, address depositContract_) Ownable(msg.sender) {
        if (mainnet == true) {
            depositContract = IDepositContract(0x00000000219ab540356cBB839Cbe05303d7705Fa);
        } else if (depositContract_ == 0x0000000000000000000000000000000000000000) {
            depositContract = IDepositContract(0x8c5fecdC472E27Bc447696F431E425D02dd46a8c);
        } else {
            depositContract = IDepositContract(depositContract_);
        }
    }

    /**
     * @dev This contract will not accept direct ETH transactions.
     */
    receive() external payable {
        revert("BatchValidatorDepositor: do not send ETH directly here");
    }

    /**
     * @dev Function that allows to deposit up to 100 nodes at once.
     *
     * - pubkeys                - Array of BLS12-381 public keys.
     * - withdrawal_credentials - Array of commitments to a public keys for withdrawals.
     * - signatures             - Array of BLS12-381 signatures.
     * - deposit_data_roots     - Array of the SHA-256 hashes of the SSZ-encoded DepositData objects.
     * - collateral             - Array of the Wei amounts to be deposited with each request.
     */
    function deposit(
        bytes[] calldata pubkeys,
        bytes[] calldata withdrawal_credentials,
        bytes[] calldata signatures,
        bytes32[] calldata deposit_data_roots,
        uint256[] calldata collateral
    ) external payable whenNotPaused {

        uint256 nodesAmount = pubkeys.length;

        require(nodesAmount >= nodesMinAmount && nodesAmount <= nodesMaxAmount, "BatchValidatorDepositor: you can deposit only 1 to 100 nodes per transaction");

        require(
            withdrawal_credentials.length == nodesAmount &&
            signatures.length == nodesAmount &&
            deposit_data_roots.length == nodesAmount &&
            collateral.length == nodesAmount,
            "BatchValidatorDepositor: amount of parameters do not match");

        uint256 totalCollateral = 0;
        for (uint256 i = 0; i < collateral.length; ++i) {
                totalCollateral += collateral[i];
        }
        require(msg.value == totalCollateral, "BatchValidatorDepositor: provided ETH does not match required ETH");

        for (uint256 i = 0; i < nodesAmount; ++i) {
            require(pubkeys[i].length == pubkeyLength, "BatchValidatorDepositor: incorrect pubkey length");
            require(withdrawal_credentials[i].length == credentialsLength, "BatchValidatorDepositor: incorrect withdrawal credentials length");
            require(signatures[i].length == signatureLength, "BatchValidatorDepositor: incorrect signature length");

            IDepositContract(address(depositContract)).deposit{value: collateral[i]}(
                pubkeys[i],
                withdrawal_credentials[i],
                signatures[i],
                deposit_data_roots[i]
            );
        }

        emit DepositEvent(msg.sender, nodesAmount, msg.value);
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function pause() public onlyOwner {
      _pause();
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function unpause() public onlyOwner {
      _unpause();
    }

    event DepositEvent(address from, uint256 nodesAmount, uint256 totalCollateral);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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 (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    bool private _paused;

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: CC0-1.0

pragma solidity ^0.8.0;

// This interface is designed to be compatible with the Vyper version.
/// @notice This is the Ethereum 2.0 deposit contract interface.
/// For more information see the Phase 0 specification under https://github.com/ethereum/eth2.0-specs
interface IDepositContract {
    /// @notice A processed deposit event.
    event DepositEvent(
        bytes pubkey,
        bytes withdrawal_credentials,
        bytes amount,
        bytes signature,
        bytes index
    );

    /// @notice Submit a Phase 0 DepositData object.
    /// @param pubkey A BLS12-381 public key.
    /// @param withdrawal_credentials Commitment to a public key for withdrawals.
    /// @param signature A BLS12-381 signature.
    /// @param deposit_data_root The SHA-256 hash of the SSZ-encoded DepositData object.
    /// Used as a protection against malformed input.
    function deposit(
        bytes calldata pubkey,
        bytes calldata withdrawal_credentials,
        bytes calldata signature,
        bytes32 deposit_data_root
    ) external payable;

    /// @notice Query the current deposit root hash.
    /// @return The deposit root hash.
    function get_deposit_root() external view returns (bytes32);

    /// @notice Query the current deposit count.
    /// @return The deposit count encoded as a little endian 64-bit number.
    function get_deposit_count() external view returns (bytes memory);
}

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

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000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000219ab540356cbb839cbe05303d7705fa

-----Decoded View---------------
Arg [0] : mainnet (bool): False
Arg [1] : depositContract_ (address): 0x00000000219ab540356cBB839Cbe05303d7705Fa

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [1] : 00000000000000000000000000000000219ab540356cbb839cbe05303d7705fa