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0xb825Fd1E322061AaC2aC8b3CDE4Ce18B93FAE276

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0x30e22ab6...9A5c72539 at txn 0x933a56facd3122d01e3b239bd609ff414c4fae477980da03d5bf6ce19645edd2

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	Transaction Hash	Method	Block		From		To
	0x933a56facd3122d01e3b239bd609ff414c4fae477980da03d5bf6ce19645edd2	0x60806040	17392868	2023-06-02 11:51:11	424 days ago	1685706671	0x30e22ab6...9A5c72539	IN	Create: ForeignOmnibridge	0 ETH$0.00	0.3605057	100

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Contract Name:

ForeignOmnibridge

Compiler Version

v0.7.5+commit.eb77ed08

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Yes with 200 runs

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default evmVersion

Contract Source Code (Solidity)

IDE

/**
 *Submitted for verification at Etherscan.io on 2023-06-02
*/

// File: @openzeppelin/contracts/math/SafeMath.sol


pragma solidity ^0.7.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @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) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

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

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: contracts/upgradeability/EternalStorage.sol

pragma solidity 0.7.5;

/**
 * @title EternalStorage
 * @dev This contract holds all the necessary state variables to carry out the storage of any contract.
 */
contract EternalStorage {
    mapping(bytes32 => uint256) internal uintStorage;
    mapping(bytes32 => string) internal stringStorage;
    mapping(bytes32 => address) internal addressStorage;
    mapping(bytes32 => bytes) internal bytesStorage;
    mapping(bytes32 => bool) internal boolStorage;
    mapping(bytes32 => int256) internal intStorage;
}

// File: contracts/upgradeable_contracts/Initializable.sol

pragma solidity 0.7.5;


contract Initializable is EternalStorage {
    bytes32 internal constant INITIALIZED = 0x0a6f646cd611241d8073675e00d1a1ff700fbf1b53fcf473de56d1e6e4b714ba; // keccak256(abi.encodePacked("isInitialized"))

    function setInitialize() internal {
        boolStorage[INITIALIZED] = true;
    }

    function isInitialized() public view returns (bool) {
        return boolStorage[INITIALIZED];
    }
}

// File: contracts/interfaces/IUpgradeabilityOwnerStorage.sol

pragma solidity 0.7.5;

interface IUpgradeabilityOwnerStorage {
    function upgradeabilityOwner() external view returns (address);
}

// File: contracts/upgradeable_contracts/Upgradeable.sol

pragma solidity 0.7.5;


contract Upgradeable {
    /**
     * @dev Throws if called by any account other than the upgradeability owner.
     */
    modifier onlyIfUpgradeabilityOwner() {
        _onlyIfUpgradeabilityOwner();
        _;
    }

    /**
     * @dev Internal function for reducing onlyIfUpgradeabilityOwner modifier bytecode overhead.
     */
    function _onlyIfUpgradeabilityOwner() internal view {
        require(msg.sender == IUpgradeabilityOwnerStorage(address(this)).upgradeabilityOwner());
    }
}

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


pragma solidity ^0.7.0;

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

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

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

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

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

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

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

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

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


pragma solidity ^0.7.0;

/**
 * @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) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @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");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (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");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        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

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol


pragma solidity ^0.7.0;




/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    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'
        // solhint-disable-next-line max-line-length
        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).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _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
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// File: contracts/upgradeable_contracts/Sacrifice.sol

pragma solidity 0.7.5;

contract Sacrifice {
    constructor(address payable _recipient) payable {
        selfdestruct(_recipient);
    }
}

// File: contracts/libraries/AddressHelper.sol

pragma solidity 0.7.5;


/**
 * @title AddressHelper
 * @dev Helper methods for Address type.
 */
library AddressHelper {
    /**
     * @dev Try to send native tokens to the address. If it fails, it will force the transfer by creating a selfdestruct contract
     * @param _receiver address that will receive the native tokens
     * @param _value the amount of native tokens to send
     */
    function safeSendValue(address payable _receiver, uint256 _value) internal {
        if (!(_receiver).send(_value)) {
            new Sacrifice{ value: _value }(_receiver);
        }
    }
}

// File: contracts/upgradeable_contracts/Claimable.sol

pragma solidity 0.7.5;



/**
 * @title Claimable
 * @dev Implementation of the claiming utils that can be useful for withdrawing accidentally sent tokens that are not used in bridge operations.
 */
contract Claimable {
    using SafeERC20 for IERC20;

    /**
     * Throws if a given address is equal to address(0)
     */
    modifier validAddress(address _to) {
        require(_to != address(0));
        _;
    }

    /**
     * @dev Withdraws the erc20 tokens or native coins from this contract.
     * Caller should additionally check that the claimed token is not a part of bridge operations (i.e. that token != erc20token()).
     * @param _token address of the claimed token or address(0) for native coins.
     * @param _to address of the tokens/coins receiver.
     */
    function claimValues(address _token, address _to) internal validAddress(_to) {
        if (_token == address(0)) {
            claimNativeCoins(_to);
        } else {
            claimErc20Tokens(_token, _to);
        }
    }

    /**
     * @dev Internal function for withdrawing all native coins from the contract.
     * @param _to address of the coins receiver.
     */
    function claimNativeCoins(address _to) internal {
        uint256 value = address(this).balance;
        AddressHelper.safeSendValue(payable(_to), value);
    }

    /**
     * @dev Internal function for withdrawing all tokens of some particular ERC20 contract from this contract.
     * @param _token address of the claimed ERC20 token.
     * @param _to address of the tokens receiver.
     */
    function claimErc20Tokens(address _token, address _to) internal {
        IERC20 token = IERC20(_token);
        uint256 balance = token.balanceOf(address(this));
        token.safeTransfer(_to, balance);
    }
}

// File: contracts/upgradeable_contracts/components/bridged/BridgedTokensRegistry.sol

pragma solidity 0.7.5;


/**
 * @title BridgedTokensRegistry
 * @dev Functionality for keeping track of registered bridged token pairs.
 */
contract BridgedTokensRegistry is EternalStorage {
    event NewTokenRegistered(address indexed nativeToken, address indexed bridgedToken);

    /**
     * @dev Retrieves address of the bridged token contract associated with a specific native token contract on the other side.
     * @param _nativeToken address of the native token contract on the other side.
     * @return address of the deployed bridged token contract.
     */
    function bridgedTokenAddress(address _nativeToken) public view returns (address) {
        return addressStorage[keccak256(abi.encodePacked("homeTokenAddress", _nativeToken))];
    }

    /**
     * @dev Retrieves address of the native token contract associated with a specific bridged token contract.
     * @param _bridgedToken address of the created bridged token contract on this side.
     * @return address of the native token contract on the other side of the bridge.
     */
    function nativeTokenAddress(address _bridgedToken) public view returns (address) {
        return addressStorage[keccak256(abi.encodePacked("foreignTokenAddress", _bridgedToken))];
    }

    /**
     * @dev Internal function for updating a pair of addresses for the bridged token.
     * @param _nativeToken address of the native token contract on the other side.
     * @param _bridgedToken address of the created bridged token contract on this side.
     */
    function _setTokenAddressPair(address _nativeToken, address _bridgedToken) internal {
        addressStorage[keccak256(abi.encodePacked("homeTokenAddress", _nativeToken))] = _bridgedToken;
        addressStorage[keccak256(abi.encodePacked("foreignTokenAddress", _bridgedToken))] = _nativeToken;

        emit NewTokenRegistered(_nativeToken, _bridgedToken);
    }
}

// File: contracts/upgradeable_contracts/components/native/NativeTokensRegistry.sol

pragma solidity 0.7.5;


/**
 * @title NativeTokensRegistry
 * @dev Functionality for keeping track of registered native tokens.
 */
contract NativeTokensRegistry is EternalStorage {
    /**
     * @dev Checks if for a given native token, the deployment of its bridged alternative was already acknowledged.
     * @param _token address of native token contract.
     * @return true, if bridged token was already deployed.
     */
    function isBridgedTokenDeployAcknowledged(address _token) public view returns (bool) {
        return boolStorage[keccak256(abi.encodePacked("ackDeploy", _token))];
    }

    /**
     * @dev Acknowledges the deployment of bridged token contract on the other side.
     * @param _token address of native token contract.
     */
    function _ackBridgedTokenDeploy(address _token) internal {
        if (!boolStorage[keccak256(abi.encodePacked("ackDeploy", _token))]) {
            boolStorage[keccak256(abi.encodePacked("ackDeploy", _token))] = true;
        }
    }
}

// File: contracts/upgradeable_contracts/components/native/MediatorBalanceStorage.sol

pragma solidity 0.7.5;



/**
 * @title MediatorBalanceStorage
 * @dev Functionality for storing expected mediator balance for native tokens.
 */
contract MediatorBalanceStorage is EternalStorage {
    /**
     * @dev Tells the expected token balance of the contract.
     * @param _token address of token contract.
     * @return the current tracked token balance of the contract.
     */
    function mediatorBalance(address _token) public view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("mediatorBalance", _token))];
    }

    /**
     * @dev Updates expected token balance of the contract.
     * @param _token address of token contract.
     * @param _balance the new token balance of the contract.
     */
    function _setMediatorBalance(address _token, uint256 _balance) internal {
        uintStorage[keccak256(abi.encodePacked("mediatorBalance", _token))] = _balance;
    }
}

// File: contracts/upgradeable_contracts/VersionableBridge.sol

pragma solidity 0.7.5;

interface VersionableBridge {
    function getBridgeInterfacesVersion()
        external
        pure
        returns (
            uint64 major,
            uint64 minor,
            uint64 patch
        );

    function getBridgeMode() external pure returns (bytes4);
}

// File: contracts/upgradeable_contracts/components/common/OmnibridgeInfo.sol

pragma solidity 0.7.5;


/**
 * @title OmnibridgeInfo
 * @dev Functionality for versioning Omnibridge mediator.
 */
contract OmnibridgeInfo is VersionableBridge {
    event TokensBridgingInitiated(
        address indexed token,
        address indexed sender,
        uint256 value,
        bytes32 indexed messageId
    );
    event TokensBridged(address indexed token, address indexed recipient, uint256 value, bytes32 indexed messageId);

    /**
     * @dev Tells the bridge interface version that this contract supports.
     * @return major value of the version
     * @return minor value of the version
     * @return patch value of the version
     */
    function getBridgeInterfacesVersion()
        external
        pure
        override
        returns (
            uint64 major,
            uint64 minor,
            uint64 patch
        )
    {
        return (3, 3, 0);
    }

    /**
     * @dev Tells the bridge mode that this contract supports.
     * @return _data 4 bytes representing the bridge mode
     */
    function getBridgeMode() external pure override returns (bytes4 _data) {
        return 0xb1516c26; // bytes4(keccak256(abi.encodePacked("multi-erc-to-erc-amb")))
    }
}

// File: contracts/upgradeable_contracts/Ownable.sol

pragma solidity 0.7.5;



/**
 * @title Ownable
 * @dev This contract has an owner address providing basic authorization control
 */
contract Ownable is EternalStorage {
    bytes4 internal constant UPGRADEABILITY_OWNER = 0x6fde8202; // upgradeabilityOwner()

    /**
     * @dev Event to show ownership has been transferred
     * @param previousOwner representing the address of the previous owner
     * @param newOwner representing the address of the new owner
     */
    event OwnershipTransferred(address previousOwner, address newOwner);

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

    /**
     * @dev Internal function for reducing onlyOwner modifier bytecode overhead.
     */
    function _onlyOwner() internal view {
        require(msg.sender == owner());
    }

    /**
     * @dev Throws if called through proxy by any account other than contract itself or an upgradeability owner.
     */
    modifier onlyRelevantSender() {
        (bool isProxy, bytes memory returnData) =
            address(this).staticcall(abi.encodeWithSelector(UPGRADEABILITY_OWNER));
        require(
            !isProxy || // covers usage without calling through storage proxy
                (returnData.length == 32 && msg.sender == abi.decode(returnData, (address))) || // covers usage through regular proxy calls
                msg.sender == address(this) // covers calls through upgradeAndCall proxy method
        );
        _;
    }

    bytes32 internal constant OWNER = 0x02016836a56b71f0d02689e69e326f4f4c1b9057164ef592671cf0d37c8040c0; // keccak256(abi.encodePacked("owner"))

    /**
     * @dev Tells the address of the owner
     * @return the address of the owner
     */
    function owner() public view returns (address) {
        return addressStorage[OWNER];
    }

    /**
     * @dev Allows the current owner to transfer control of the contract to a newOwner.
     * @param newOwner the address to transfer ownership to.
     */
    function transferOwnership(address newOwner) external onlyOwner {
        _setOwner(newOwner);
    }

    /**
     * @dev Sets a new owner address
     */
    function _setOwner(address newOwner) internal {
        require(newOwner != address(0));
        emit OwnershipTransferred(owner(), newOwner);
        addressStorage[OWNER] = newOwner;
    }
}

// File: contracts/upgradeable_contracts/components/common/TokensBridgeLimits.sol

pragma solidity 0.7.5;




/**
 * @title TokensBridgeLimits
 * @dev Functionality for keeping track of bridging limits for multiple tokens.
 */
contract TokensBridgeLimits is EternalStorage, Ownable {
    using SafeMath for uint256;

    // token == 0x00..00 represents default limits (assuming decimals == 18) for all newly created tokens
    event DailyLimitChanged(address indexed token, uint256 newLimit);
    event ExecutionDailyLimitChanged(address indexed token, uint256 newLimit);

    /**
     * @dev Checks if specified token was already bridged at least once.
     * @param _token address of the token contract.
     * @return true, if token address is address(0) or token was already bridged.
     */
    function isTokenRegistered(address _token) public view returns (bool) {
        return minPerTx(_token) > 0;
    }

    /**
     * @dev Retrieves the total spent amount for particular token during specific day.
     * @param _token address of the token contract.
     * @param _day day number for which spent amount if requested.
     * @return amount of tokens sent through the bridge to the other side.
     */
    function totalSpentPerDay(address _token, uint256 _day) public view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("totalSpentPerDay", _token, _day))];
    }

    /**
     * @dev Retrieves the total executed amount for particular token during specific day.
     * @param _token address of the token contract.
     * @param _day day number for which spent amount if requested.
     * @return amount of tokens received from the bridge from the other side.
     */
    function totalExecutedPerDay(address _token, uint256 _day) public view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("totalExecutedPerDay", _token, _day))];
    }

    /**
     * @dev Retrieves current daily limit for a particular token contract.
     * @param _token address of the token contract.
     * @return daily limit on tokens that can be sent through the bridge per day.
     */
    function dailyLimit(address _token) public view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("dailyLimit", _token))];
    }

    /**
     * @dev Retrieves current execution daily limit for a particular token contract.
     * @param _token address of the token contract.
     * @return daily limit on tokens that can be received from the bridge on the other side per day.
     */
    function executionDailyLimit(address _token) public view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("executionDailyLimit", _token))];
    }

    /**
     * @dev Retrieves current maximum amount of tokens per one transfer for a particular token contract.
     * @param _token address of the token contract.
     * @return maximum amount on tokens that can be sent through the bridge in one transfer.
     */
    function maxPerTx(address _token) public view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("maxPerTx", _token))];
    }

    /**
     * @dev Retrieves current maximum execution amount of tokens per one transfer for a particular token contract.
     * @param _token address of the token contract.
     * @return maximum amount on tokens that can received from the bridge on the other side in one transaction.
     */
    function executionMaxPerTx(address _token) public view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("executionMaxPerTx", _token))];
    }

    /**
     * @dev Retrieves current minimum amount of tokens per one transfer for a particular token contract.
     * @param _token address of the token contract.
     * @return minimum amount on tokens that can be sent through the bridge in one transfer.
     */
    function minPerTx(address _token) public view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("minPerTx", _token))];
    }

    /**
     * @dev Checks that bridged amount of tokens conforms to the configured limits.
     * @param _token address of the token contract.
     * @param _amount amount of bridge tokens.
     * @return true, if specified amount can be bridged.
     */
    function withinLimit(address _token, uint256 _amount) public view returns (bool) {
        uint256 nextLimit = totalSpentPerDay(_token, getCurrentDay()).add(_amount);
        return
            dailyLimit(address(0)) > 0 &&
            dailyLimit(_token) >= nextLimit &&
            _amount <= maxPerTx(_token) &&
            _amount >= minPerTx(_token);
    }

    /**
     * @dev Checks that bridged amount of tokens conforms to the configured execution limits.
     * @param _token address of the token contract.
     * @param _amount amount of bridge tokens.
     * @return true, if specified amount can be processed and executed.
     */
    function withinExecutionLimit(address _token, uint256 _amount) public view returns (bool) {
        uint256 nextLimit = totalExecutedPerDay(_token, getCurrentDay()).add(_amount);
        return
            executionDailyLimit(address(0)) > 0 &&
            executionDailyLimit(_token) >= nextLimit &&
            _amount <= executionMaxPerTx(_token);
    }

    /**
     * @dev Returns current day number.
     * @return day number.
     */
    function getCurrentDay() public view returns (uint256) {
        // solhint-disable-next-line not-rely-on-time
        return block.timestamp / 1 days;
    }

    /**
     * @dev Updates daily limit for the particular token. Only owner can call this method.
     * @param _token address of the token contract, or address(0) for configuring the efault limit.
     * @param _dailyLimit daily allowed amount of bridged tokens, should be greater than maxPerTx.
     * 0 value is also allowed, will stop the bridge operations in outgoing direction.
     */
    function setDailyLimit(address _token, uint256 _dailyLimit) external onlyOwner {
        require(isTokenRegistered(_token));
        require(_dailyLimit > maxPerTx(_token) || _dailyLimit == 0);
        uintStorage[keccak256(abi.encodePacked("dailyLimit", _token))] = _dailyLimit;
        emit DailyLimitChanged(_token, _dailyLimit);
    }

    /**
     * @dev Updates execution daily limit for the particular token. Only owner can call this method.
     * @param _token address of the token contract, or address(0) for configuring the default limit.
     * @param _dailyLimit daily allowed amount of executed tokens, should be greater than executionMaxPerTx.
     * 0 value is also allowed, will stop the bridge operations in incoming direction.
     */
    function setExecutionDailyLimit(address _token, uint256 _dailyLimit) external onlyOwner {
        require(isTokenRegistered(_token));
        require(_dailyLimit > executionMaxPerTx(_token) || _dailyLimit == 0);
        uintStorage[keccak256(abi.encodePacked("executionDailyLimit", _token))] = _dailyLimit;
        emit ExecutionDailyLimitChanged(_token, _dailyLimit);
    }

    /**
     * @dev Updates execution maximum per transaction for the particular token. Only owner can call this method.
     * @param _token address of the token contract, or address(0) for configuring the default limit.
     * @param _maxPerTx maximum amount of executed tokens per one transaction, should be less than executionDailyLimit.
     * 0 value is also allowed, will stop the bridge operations in incoming direction.
     */
    function setExecutionMaxPerTx(address _token, uint256 _maxPerTx) external onlyOwner {
        require(isTokenRegistered(_token));
        require(_maxPerTx == 0 || (_maxPerTx > 0 && _maxPerTx < executionDailyLimit(_token)));
        uintStorage[keccak256(abi.encodePacked("executionMaxPerTx", _token))] = _maxPerTx;
    }

    /**
     * @dev Updates maximum per transaction for the particular token. Only owner can call this method.
     * @param _token address of the token contract, or address(0) for configuring the default limit.
     * @param _maxPerTx maximum amount of tokens per one transaction, should be less than dailyLimit, greater than minPerTx.
     * 0 value is also allowed, will stop the bridge operations in outgoing direction.
     */
    function setMaxPerTx(address _token, uint256 _maxPerTx) external onlyOwner {
        require(isTokenRegistered(_token));
        require(_maxPerTx == 0 || (_maxPerTx > minPerTx(_token) && _maxPerTx < dailyLimit(_token)));
        uintStorage[keccak256(abi.encodePacked("maxPerTx", _token))] = _maxPerTx;
    }

    /**
     * @dev Updates minimum per transaction for the particular token. Only owner can call this method.
     * @param _token address of the token contract, or address(0) for configuring the default limit.
     * @param _minPerTx minimum amount of tokens per one transaction, should be less than maxPerTx and dailyLimit.
     */
    function setMinPerTx(address _token, uint256 _minPerTx) external onlyOwner {
        require(isTokenRegistered(_token));
        require(_minPerTx > 0 && _minPerTx < dailyLimit(_token) && _minPerTx < maxPerTx(_token));
        uintStorage[keccak256(abi.encodePacked("minPerTx", _token))] = _minPerTx;
    }

    /**
     * @dev Retrieves maximum available bridge amount per one transaction taking into account maxPerTx() and dailyLimit() parameters.
     * @param _token address of the token contract, or address(0) for the default limit.
     * @return minimum of maxPerTx parameter and remaining daily quota.
     */
    function maxAvailablePerTx(address _token) public view returns (uint256) {
        uint256 _maxPerTx = maxPerTx(_token);
        uint256 _dailyLimit = dailyLimit(_token);
        uint256 _spent = totalSpentPerDay(_token, getCurrentDay());
        uint256 _remainingOutOfDaily = _dailyLimit > _spent ? _dailyLimit - _spent : 0;
        return _maxPerTx < _remainingOutOfDaily ? _maxPerTx : _remainingOutOfDaily;
    }

    /**
     * @dev Internal function for adding spent amount for some token.
     * @param _token address of the token contract.
     * @param _day day number, when tokens are processed.
     * @param _value amount of bridge tokens.
     */
    function addTotalSpentPerDay(
        address _token,
        uint256 _day,
        uint256 _value
    ) internal {
        uintStorage[keccak256(abi.encodePacked("totalSpentPerDay", _token, _day))] = totalSpentPerDay(_token, _day).add(
            _value
        );
    }

    /**
     * @dev Internal function for adding executed amount for some token.
     * @param _token address of the token contract.
     * @param _day day number, when tokens are processed.
     * @param _value amount of bridge tokens.
     */
    function addTotalExecutedPerDay(
        address _token,
        uint256 _day,
        uint256 _value
    ) internal {
        uintStorage[keccak256(abi.encodePacked("totalExecutedPerDay", _token, _day))] = totalExecutedPerDay(
            _token,
            _day
        )
            .add(_value);
    }

    /**
     * @dev Internal function for initializing limits for some token.
     * @param _token address of the token contract.
     * @param _limits [ 0 = dailyLimit, 1 = maxPerTx, 2 = minPerTx ].
     */
    function _setLimits(address _token, uint256[3] memory _limits) internal {
        require(
            _limits[2] > 0 && // minPerTx > 0
                _limits[1] > _limits[2] && // maxPerTx > minPerTx
                _limits[0] > _limits[1] // dailyLimit > maxPerTx
        );

        uintStorage[keccak256(abi.encodePacked("dailyLimit", _token))] = _limits[0];
        uintStorage[keccak256(abi.encodePacked("maxPerTx", _token))] = _limits[1];
        uintStorage[keccak256(abi.encodePacked("minPerTx", _token))] = _limits[2];

        emit DailyLimitChanged(_token, _limits[0]);
    }

    /**
     * @dev Internal function for initializing execution limits for some token.
     * @param _token address of the token contract.
     * @param _limits [ 0 = executionDailyLimit, 1 = executionMaxPerTx ].
     */
    function _setExecutionLimits(address _token, uint256[2] memory _limits) internal {
        require(_limits[1] < _limits[0]); // foreignMaxPerTx < foreignDailyLimit

        uintStorage[keccak256(abi.encodePacked("executionDailyLimit", _token))] = _limits[0];
        uintStorage[keccak256(abi.encodePacked("executionMaxPerTx", _token))] = _limits[1];

        emit ExecutionDailyLimitChanged(_token, _limits[0]);
    }

    /**
     * @dev Internal function for initializing limits for some token relative to its decimals parameter.
     * @param _token address of the token contract.
     * @param _decimals token decimals parameter.
     */
    function _initializeTokenBridgeLimits(address _token, uint256 _decimals) internal {
        uint256 factor;
        if (_decimals < 18) {
            factor = 10**(18 - _decimals);

            uint256 _minPerTx = minPerTx(address(0)).div(factor);
            uint256 _maxPerTx = maxPerTx(address(0)).div(factor);
            uint256 _dailyLimit = dailyLimit(address(0)).div(factor);
            uint256 _executionMaxPerTx = executionMaxPerTx(address(0)).div(factor);
            uint256 _executionDailyLimit = executionDailyLimit(address(0)).div(factor);

            // such situation can happen when calculated limits relative to the token decimals are too low
            // e.g. minPerTx(address(0)) == 10 ** 14, _decimals == 3. _minPerTx happens to be 0, which is not allowed.
            // in this case, limits are raised to the default values
            if (_minPerTx == 0) {
                // Numbers 1, 100, 10000 are chosen in a semi-random way,
                // so that any token with small decimals can still be bridged in some amounts.
                // It is possible to override limits for the particular token later if needed.
                _minPerTx = 1;
                if (_maxPerTx <= _minPerTx) {
                    _maxPerTx = 100;
                    _executionMaxPerTx = 100;
                    if (_dailyLimit <= _maxPerTx || _executionDailyLimit <= _executionMaxPerTx) {
                        _dailyLimit = 10000;
                        _executionDailyLimit = 10000;
                    }
                }
            }
            _setLimits(_token, [_dailyLimit, _maxPerTx, _minPerTx]);
            _setExecutionLimits(_token, [_executionDailyLimit, _executionMaxPerTx]);
        } else {
            factor = 10**(_decimals - 18);
            _setLimits(
                _token,
                [dailyLimit(address(0)).mul(factor), maxPerTx(address(0)).mul(factor), minPerTx(address(0)).mul(factor)]
            );
            _setExecutionLimits(
                _token,
                [executionDailyLimit(address(0)).mul(factor), executionMaxPerTx(address(0)).mul(factor)]
            );
        }
    }
}

// File: contracts/interfaces/IAMB.sol

pragma solidity 0.7.5;

interface IAMB {
    event UserRequestForAffirmation(bytes32 indexed messageId, bytes encodedData);
    event UserRequestForSignature(bytes32 indexed messageId, bytes encodedData);
    event AffirmationCompleted(
        address indexed sender,
        address indexed executor,
        bytes32 indexed messageId,
        bool status
    );
    event RelayedMessage(address indexed sender, address indexed executor, bytes32 indexed messageId, bool status);

    function messageSender() external view returns (address);

    function maxGasPerTx() external view returns (uint256);

    function transactionHash() external view returns (bytes32);

    function messageId() external view returns (bytes32);

    function messageSourceChainId() external view returns (bytes32);

    function messageCallStatus(bytes32 _messageId) external view returns (bool);

    function failedMessageDataHash(bytes32 _messageId) external view returns (bytes32);

    function failedMessageReceiver(bytes32 _messageId) external view returns (address);

    function failedMessageSender(bytes32 _messageId) external view returns (address);

    function requireToPassMessage(
        address _contract,
        bytes calldata _data,
        uint256 _gas
    ) external returns (bytes32);

    function requireToConfirmMessage(
        address _contract,
        bytes calldata _data,
        uint256 _gas
    ) external returns (bytes32);

    function sourceChainId() external view returns (uint256);

    function destinationChainId() external view returns (uint256);
}

// File: contracts/upgradeable_contracts/BasicAMBMediator.sol

pragma solidity 0.7.5;




/**
 * @title BasicAMBMediator
 * @dev Basic storage and methods needed by mediators to interact with AMB bridge.
 */
abstract contract BasicAMBMediator is Ownable {
    bytes32 internal constant BRIDGE_CONTRACT = 0x811bbb11e8899da471f0e69a3ed55090fc90215227fc5fb1cb0d6e962ea7b74f; // keccak256(abi.encodePacked("bridgeContract"))
    bytes32 internal constant MEDIATOR_CONTRACT = 0x98aa806e31e94a687a31c65769cb99670064dd7f5a87526da075c5fb4eab9880; // keccak256(abi.encodePacked("mediatorContract"))
    bytes32 internal constant WPLS_CONTRACT = 0x59d6267c963dfa6f508daa0db28ce48957e9ccaf6be68a72221b89800942bdc7; // keccak256(abi.encodePacked("wplsContract"))

    /**
     * @dev Throws if caller on the other side is not an associated mediator.
     */
    modifier onlyMediator {
        _onlyMediator();
        _;
    }

    /**
     * @dev Internal function for reducing onlyMediator modifier bytecode overhead.
     */
    function _onlyMediator() internal view {
        IAMB bridge = bridgeContract();
        require(msg.sender == address(bridge));
        require(bridge.messageSender() == mediatorContractOnOtherSide());
    }

    /**
     * @dev Sets the AMB bridge contract address. Only the owner can call this method.
     * @param _bridgeContract the address of the bridge contract.
     */
    function setBridgeContract(address _bridgeContract) external onlyOwner {
        _setBridgeContract(_bridgeContract);
    }

    /**
     * @dev Sets the mediator contract address from the other network. Only the owner can call this method.
     * @param _mediatorContract the address of the mediator contract.
     */
    function setMediatorContractOnOtherSide(address _mediatorContract) external onlyOwner {
        _setMediatorContractOnOtherSide(_mediatorContract);
    }

    /**
     * @dev Sets the WPLS contract address. Only the owner can call this method.
     * @param _wplsContract address.
     */
    function setWPLSContract(address _wplsContract) external onlyOwner {
        _setWPLSContract(_wplsContract);
    }

    /**
     * @dev Get the AMB interface for the bridge contract address
     * @return AMB interface for the bridge contract address
     */
    function bridgeContract() public view returns (IAMB) {
        return IAMB(addressStorage[BRIDGE_CONTRACT]);
    }

    /**
     * @dev Tells the mediator contract address from the other network.
     * @return the address of the mediator contract.
     */
    function mediatorContractOnOtherSide() public view virtual returns (address) {
        return addressStorage[MEDIATOR_CONTRACT];
    }

    /**
     * @dev Tells the WPLS contract address.
     * @return the address of the WPLS contract.
     */
    function wplsContract() public view virtual returns (address) {
        return addressStorage[WPLS_CONTRACT];
    }

    /**
     * @dev Stores a valid AMB bridge contract address.
     * @param _bridgeContract the address of the bridge contract.
     */
    function _setBridgeContract(address _bridgeContract) internal {
        require(Address.isContract(_bridgeContract));
        addressStorage[BRIDGE_CONTRACT] = _bridgeContract;
    }

    /**
     * @dev Stores the mediator contract address from the other network.
     * @param _mediatorContract the address of the mediator contract.
     */
    function _setMediatorContractOnOtherSide(address _mediatorContract) internal {
        addressStorage[MEDIATOR_CONTRACT] = _mediatorContract;
    }

    /**
     * @dev Stores the WPLS contract address.
     * @param _wplsContract the address.
     */
    function _setWPLSContract(address _wplsContract) internal {
        addressStorage[WPLS_CONTRACT] = _wplsContract;
    }

    /**
     * @dev Tells the id of the message originated on the other network.
     * @return the id of the message originated on the other network.
     */
    function messageId() internal view returns (bytes32) {
        return bridgeContract().messageId();
    }

    /**
     * @dev Tells the maximum gas limit that a message can use on its execution by the AMB bridge on the other network.
     * @return the maximum gas limit value.
     */
    function maxGasPerTx() internal view returns (uint256) {
        return bridgeContract().maxGasPerTx();
    }

    function _passMessage(bytes memory _data) internal virtual returns (bytes32);
}

// File: contracts/upgradeable_contracts/components/common/BridgeOperationsStorage.sol

pragma solidity 0.7.5;


/**
 * @title BridgeOperationsStorage
 * @dev Functionality for storing processed bridged operations.
 */
abstract contract BridgeOperationsStorage is EternalStorage {
    /**
     * @dev Stores the bridged token of a message sent to the AMB bridge.
     * @param _messageId of the message sent to the bridge.
     * @param _token bridged token address.
     */
    function setMessageToken(bytes32 _messageId, address _token) internal {
        addressStorage[keccak256(abi.encodePacked("messageToken", _messageId))] = _token;
    }

    /**
     * @dev Tells the bridged token address of a message sent to the AMB bridge.
     * @return address of a token contract.
     */
    function messageToken(bytes32 _messageId) internal view returns (address) {
        return addressStorage[keccak256(abi.encodePacked("messageToken", _messageId))];
    }

    /**
     * @dev Stores the value of a message sent to the AMB bridge.
     * @param _messageId of the message sent to the bridge.
     * @param _value amount of tokens bridged.
     */
    function setMessageValue(bytes32 _messageId, uint256 _value) internal {
        uintStorage[keccak256(abi.encodePacked("messageValue", _messageId))] = _value;
    }

    /**
     * @dev Tells the amount of tokens of a message sent to the AMB bridge.
     * @return value representing amount of tokens.
     */
    function messageValue(bytes32 _messageId) internal view returns (uint256) {
        return uintStorage[keccak256(abi.encodePacked("messageValue", _messageId))];
    }

    /**
     * @dev Stores the receiver of a message sent to the AMB bridge.
     * @param _messageId of the message sent to the bridge.
     * @param _recipient receiver of the tokens bridged.
     */
    function setMessageRecipient(bytes32 _messageId, address _recipient) internal {
        addressStorage[keccak256(abi.encodePacked("messageRecipient", _messageId))] = _recipient;
    }

    /**
     * @dev Tells the receiver of a message sent to the AMB bridge.
     * @return address of the receiver.
     */
    function messageRecipient(bytes32 _messageId) internal view returns (address) {
        return addressStorage[keccak256(abi.encodePacked("messageRecipient", _messageId))];
    }
}

// File: contracts/upgradeable_contracts/components/common/FailedMessagesProcessor.sol

pragma solidity 0.7.5;



/**
 * @title FailedMessagesProcessor
 * @dev Functionality for fixing failed bridging operations.
 */
abstract contract FailedMessagesProcessor is BasicAMBMediator, BridgeOperationsStorage {
    event FailedMessageFixed(bytes32 indexed messageId, address token, address recipient, uint256 value);

    /**
     * @dev Method to be called when a bridged message execution failed. It will generate a new message requesting to
     * fix/roll back the transferred assets on the other network.
     * @param _messageId id of the message which execution failed.
     */
    function requestFailedMessageFix(bytes32 _messageId) external {
        IAMB bridge = bridgeContract();
        require(!bridge.messageCallStatus(_messageId));
        require(bridge.failedMessageReceiver(_messageId) == address(this));
        require(bridge.failedMessageSender(_messageId) == mediatorContractOnOtherSide());

        bytes4 methodSelector = this.fixFailedMessage.selector;
        bytes memory data = abi.encodeWithSelector(methodSelector, _messageId);
        _passMessage(data);
    }

    /**
     * @dev Handles the request to fix transferred assets which bridged message execution failed on the other network.
     * It uses the information stored by passMessage method when the assets were initially transferred
     * @param _messageId id of the message which execution failed on the other network.
     */
    function fixFailedMessage(bytes32 _messageId) public onlyMediator {
        require(!messageFixed(_messageId));

        address token = messageToken(_messageId);
        address recipient = messageRecipient(_messageId);
        uint256 value = messageValue(_messageId);
        setMessageFixed(_messageId);
        executeActionOnFixedTokens(token, recipient, value);
        emit FailedMessageFixed(_messageId, token, recipient, value);
    }

    /**
     * @dev Tells if a message sent to the AMB bridge has been fixed.
     * @return bool indicating the status of the message.
     */
    function messageFixed(bytes32 _messageId) public view returns (bool) {
        return boolStorage[keccak256(abi.encodePacked("messageFixed", _messageId))];
    }

    /**
     * @dev Sets that the message sent to the AMB bridge has been fixed.
     * @param _messageId of the message sent to the bridge.
     */
    function setMessageFixed(bytes32 _messageId) internal {
        boolStorage[keccak256(abi.encodePacked("messageFixed", _messageId))] = true;
    }

    function executeActionOnFixedTokens(
        address _token,
        address _recipient,
        uint256 _value
    ) internal virtual;
}

// File: contracts/interfaces/IERC677.sol

pragma solidity 0.7.5;


interface IERC677 is IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value, bytes data);

    function transferAndCall(
        address to,
        uint256 value,
        bytes calldata data
    ) external returns (bool);

    function increaseAllowance(address spender, uint256 addedValue) external returns (bool);

    function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool);
}

// File: contracts/interfaces/IBurnableMintableERC677Token.sol

pragma solidity 0.7.5;


interface IBurnableMintableERC677Token is IERC677 {
    function mint(address _to, uint256 _amount) external returns (bool);

    function burn(uint256 _value) external;

    function claimTokens(address _token, address _to) external;
}

// File: contracts/interfaces/IERC20Metadata.sol

pragma solidity 0.7.5;

interface IERC20Metadata {
    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);
}

// File: contracts/interfaces/IERC20Receiver.sol

pragma solidity 0.7.5;

interface IERC20Receiver {
    function onTokenBridged(
        address token,
        uint256 value,
        bytes calldata data
    ) external;
}

// File: contracts/libraries/TokenReader.sol

pragma solidity 0.7.5;

// solhint-disable
interface ITokenDetails {
    function name() external view;
    function NAME() external view;
    function symbol() external view;
    function SYMBOL() external view;
    function decimals() external view;
    function DECIMALS() external view;
}
// solhint-enable

/**
 * @title TokenReader
 * @dev Helper methods for reading name/symbol/decimals parameters from ERC20 token contracts.
 */
library TokenReader {
    /**
     * @dev Reads the name property of the provided token.
     * Either name() or NAME() method is used.
     * Both, string and bytes32 types are supported.
     * @param _token address of the token contract.
     * @return token name as a string or an empty string if none of the methods succeeded.
     */
    function readName(address _token) internal view returns (string memory) {
        (bool status, bytes memory data) = _token.staticcall(abi.encodeWithSelector(ITokenDetails.name.selector));
        if (!status) {
            (status, data) = _token.staticcall(abi.encodeWithSelector(ITokenDetails.NAME.selector));
            if (!status) {
                return "";
            }
        }
        return _convertToString(data);
    }

    /**
     * @dev Reads the symbol property of the provided token.
     * Either symbol() or SYMBOL() method is used.
     * Both, string and bytes32 types are supported.
     * @param _token address of the token contract.
     * @return token symbol as a string or an empty string if none of the methods succeeded.
     */
    function readSymbol(address _token) internal view returns (string memory) {
        (bool status, bytes memory data) = _token.staticcall(abi.encodeWithSelector(ITokenDetails.symbol.selector));
        if (!status) {
            (status, data) = _token.staticcall(abi.encodeWithSelector(ITokenDetails.SYMBOL.selector));
            if (!status) {
                return "";
            }
        }
        return _convertToString(data);
    }

    /**
     * @dev Reads the decimals property of the provided token.
     * Either decimals() or DECIMALS() method is used.
     * @param _token address of the token contract.
     * @return token decimals or 0 if none of the methods succeeded.
     */
    function readDecimals(address _token) internal view returns (uint8) {
        (bool status, bytes memory data) = _token.staticcall(abi.encodeWithSelector(ITokenDetails.decimals.selector));
        if (!status) {
            (status, data) = _token.staticcall(abi.encodeWithSelector(ITokenDetails.DECIMALS.selector));
            if (!status) {
                return 0;
            }
        }
        return abi.decode(data, (uint8));
    }

    /**
     * @dev Internal function for converting returned value of name()/symbol() from bytes32/string to string.
     * @param returnData data returned by the token contract.
     * @return string with value obtained from returnData.
     */
    function _convertToString(bytes memory returnData) private pure returns (string memory) {
        if (returnData.length > 32) {
            return abi.decode(returnData, (string));
        } else if (returnData.length == 32) {
            bytes32 data = abi.decode(returnData, (bytes32));
            string memory res = new string(32);
            assembly {
                let len := 0
                mstore(add(res, 32), data) // save value in result string

                // solhint-disable
                for { } gt(data, 0) { len := add(len, 1) } { // until string is empty
                    data := shl(8, data) // shift left by one symbol
                }
                // solhint-enable
                mstore(res, len) // save result string length
            }
            return res;
        } else {
            return "";
        }
    }
}

// File: contracts/libraries/SafeMint.sol

pragma solidity 0.7.5;


/**
 * @title SafeMint
 * @dev Wrapper around the mint() function in all mintable tokens that verifies the return value.
 */
library SafeMint {
    /**
     * @dev Wrapper around IBurnableMintableERC677Token.mint() that verifies that output value is true.
     * @param _token token contract.
     * @param _to address of the tokens receiver.
     * @param _value amount of tokens to mint.
     */
    function safeMint(
        IBurnableMintableERC677Token _token,
        address _to,
        uint256 _value
    ) internal {
        require(_token.mint(_to, _value));
    }
}

// File: contracts/upgradeable_contracts/ReentrancyGuard.sol

pragma solidity 0.7.5;

contract ReentrancyGuard {
    function lock() internal view returns (bool res) {
        assembly {
            // Even though this is not the same as boolStorage[keccak256(abi.encodePacked("lock"))],
            // since solidity mapping introduces another level of addressing, such slot change is safe
            // for temporary variables which are cleared at the end of the call execution.
            res := sload(0x6168652c307c1e813ca11cfb3a601f1cf3b22452021a5052d8b05f1f1f8a3e92) // keccak256(abi.encodePacked("lock"))
        }
    }

    function setLock(bool _lock) internal {
        assembly {
            // Even though this is not the same as boolStorage[keccak256(abi.encodePacked("lock"))],
            // since solidity mapping introduces another level of addressing, such slot change is safe
            // for temporary variables which are cleared at the end of the call execution.
            sstore(0x6168652c307c1e813ca11cfb3a601f1cf3b22452021a5052d8b05f1f1f8a3e92, _lock) // keccak256(abi.encodePacked("lock"))
        }
    }
}

// File: contracts/libraries/Bytes.sol

pragma solidity 0.7.5;

/**
 * @title Bytes
 * @dev Helper methods to transform bytes to other solidity types.
 */
library Bytes {
    /**
     * @dev Truncate bytes array if its size is more than 20 bytes.
     * NOTE: This function does not perform any checks on the received parameter.
     * Make sure that the _bytes argument has a correct length, not less than 20 bytes.
     * A case when _bytes has length less than 20 will lead to the undefined behaviour,
     * since assembly will read data from memory that is not related to the _bytes argument.
     * @param _bytes to be converted to address type
     * @return addr address included in the firsts 20 bytes of the bytes array in parameter.
     */
    function bytesToAddress(bytes memory _bytes) internal pure returns (address addr) {
        assembly {
            addr := mload(add(_bytes, 20))
        }
    }
}

// File: contracts/upgradeable_contracts/BasicOmnibridge.sol

pragma solidity 0.7.5;


















/**
 * @title BasicOmnibridge
 * @dev Common functionality for multi-token mediator intended to work on top of AMB bridge.
 */
abstract contract BasicOmnibridge is
    Initializable,
    Upgradeable,
    Claimable,
    OmnibridgeInfo,
    FailedMessagesProcessor,
    BridgedTokensRegistry,
    NativeTokensRegistry,
    MediatorBalanceStorage,
    TokensBridgeLimits,
    ReentrancyGuard
{
    using SafeERC20 for IERC677;
    using SafeMint for IBurnableMintableERC677Token;
    using SafeMath for uint256;

    /**
     * @dev ERC677 transfer callback function.
     * @param _from address of tokens sender.
     * @param _value amount of transferred tokens.
     * @param _data additional transfer data, can be used for passing alternative receiver address.
     */
    function onTokenTransfer(
        address _from,
        uint256 _value,
        bytes memory _data
    ) external returns (bool) {
        require(nativeTokenAddress(msg.sender) == addressStorage[WPLS_CONTRACT]);
        if (!lock()) {
            bytes memory data = new bytes(0);
            address receiver = _from;
            if (_data.length >= 20) {
                receiver = Bytes.bytesToAddress(_data);
                if (_data.length > 20) {
                    assembly {
                        let size := sub(mload(_data), 20)
                        data := add(_data, 20)
                        mstore(data, size)
                    }
                }
            }
            bridgeSpecificActionsOnTokenTransfer(msg.sender, _from, receiver, _value, data);
        }
        return true;
    }

    /**
     * @dev Initiate the bridge operation for some amount of tokens from msg.sender.
     * The user should first call Approve method of the ERC677 token.
     * @param token bridged token contract address.
     * @param _receiver address that will receive the native tokens on the other network.
     * @param _value amount of tokens to be transferred to the other network.
     */
    function relayTokens(
        IERC677 token,
        address _receiver,
        uint256 _value
    ) external {
        _relayTokens(token, _receiver, _value, new bytes(0));
    }

    /**
     * @dev Initiate the bridge operation for some amount of tokens from msg.sender to msg.sender on the other side.
     * The user should first call Approve method of the ERC677 token.
     * @param token bridged token contract address.
     * @param _value amount of tokens to be transferred to the other network.
     */
    function relayTokens(IERC677 token, uint256 _value) external {
        _relayTokens(token, msg.sender, _value, new bytes(0));
    }

    /**
     * @dev Initiate the bridge operation for some amount of tokens from msg.sender.
     * The user should first call Approve method of the ERC677 token.
     * @param token bridged token contract address.
     * @param _receiver address that will receive the native tokens on the other network.
     * @param _value amount of tokens to be transferred to the other network.
     * @param _data additional transfer data to be used on the other side.
     */
    function relayTokensAndCall(
        IERC677 token,
        address _receiver,
        uint256 _value,
        bytes memory _data
    ) external {
        _relayTokens(token, _receiver, _value, _data);
    }

    /**
     * @dev Validates that the token amount is inside the limits, calls transferFrom to transfer the tokens to the contract
     * and invokes the method to burn/lock the tokens and unlock/mint the tokens on the other network.
     * The user should first call Approve method of the ERC677 token.
     * @param token bridge token contract address.
     * @param _receiver address that will receive the native tokens on the other network.
     * @param _value amount of tokens to be transferred to the other network.
     * @param _data additional transfer data to be used on the other side.
     */
    function _relayTokens(
        IERC677 token,
        address _receiver,
        uint256 _value,
        bytes memory _data
    ) internal {
        // This lock is to prevent calling passMessage twice if a ERC677 token is used.
        // When transferFrom is called, after the transfer, the ERC677 token will call onTokenTransfer from this contract
        // which will call passMessage.
        require(address(token) == addressStorage[WPLS_CONTRACT]);
        require(!lock());

        uint256 balanceBefore = token.balanceOf(address(this));
        setLock(true);
        token.safeTransferFrom(msg.sender, address(this), _value);
        setLock(false);
        uint256 balanceDiff = token.balanceOf(address(this)).sub(balanceBefore);
        require(balanceDiff <= _value);
        bridgeSpecificActionsOnTokenTransfer(address(token), msg.sender, _receiver, balanceDiff, _data);
    }

    /**
     * @dev Handles the bridged tokens for the already registered token pair.
     * Checks that the value is inside the execution limits and invokes the Mint accordingly.
     * @param _token address of the native ERC20/ERC677 token on the other side.
     * @param _recipient address that will receive the tokens.
     * @param _value amount of tokens to be received.
     */
    function handleBridgedTokens(
        address _token,
        address _recipient,
        uint256 _value
    ) external onlyMediator {
        address token = bridgedTokenAddress(_token);

        require(isTokenRegistered(token));

        _handleTokens(token, false, _recipient, _value);
    }

    /**
     * @dev Handles the bridged tokens for the already registered token pair.
     * Checks that the value is inside the execution limits and invokes the Unlock accordingly.
     * Executes a callback on the receiver.
     * @param _token address of the native ERC20/ERC677 token on the other side.
     * @param _recipient address that will receive the tokens.
     * @param _value amount of tokens to be received.
     * @param _data additional transfer data passed from the other side.
     */
    function handleBridgedTokensAndCall(
        address _token,
        address _recipient,
        uint256 _value,
        bytes memory _data
    ) external onlyMediator {
        address token = bridgedTokenAddress(_token);

        require(isTokenRegistered(token));

        uint256 valueAfterFee = _handleTokens(token, false, _recipient, _value);

        _receiverCallback(_recipient, token, valueAfterFee, _data);
    }

    /**
     * @dev Handles the bridged tokens that are native to this chain.
     * Checks that the value is inside the execution limits and invokes the Unlock accordingly.
     * @param _token native ERC20 token.
     * @param _recipient address that will receive the tokens.
     * @param _value amount of tokens to be received.
     */
    function handleNativeTokens(
        address _token,
        address _recipient,
        uint256 _value
    ) external onlyMediator {
        _ackBridgedTokenDeploy(_token);

        _handleTokens(_token, true, _recipient, _value);
    }

    /**
     * @dev Handles the bridged tokens that are native to this chain.
     * Checks that the value is inside the execution limits and invokes the Unlock accordingly.
     * Executes a callback on the receiver.
     * @param _token native ERC20 token.
     * @param _recipient address that will receive the tokens.
     * @param _value amount of tokens to be received.
     * @param _data additional transfer data passed from the other side.
     */
    function handleNativeTokensAndCall(
        address _token,
        address _recipient,
        uint256 _value,
        bytes memory _data
    ) external onlyMediator {
        _ackBridgedTokenDeploy(_token);

        uint256 valueAfterFee = _handleTokens(_token, true, _recipient, _value);

        _receiverCallback(_recipient, _token, valueAfterFee, _data);
    }

    /**
     * @dev Checks if a given token is a bridged token that is native to this side of the bridge.
     * @param _token address of token contract.
     * @return message id of the send message.
     */
    function isRegisteredAsNativeToken(address _token) public view returns (bool) {
        return isTokenRegistered(_token) && nativeTokenAddress(_token) == address(0);
    }

    /**
     * @dev Unlock back the amount of tokens that were bridged to the other network but failed.
     * @param _token address that bridged token contract.
     * @param _recipient address that will receive the tokens.
     * @param _value amount of tokens to be received.
     */
    function executeActionOnFixedTokens(
        address _token,
        address _recipient,
        uint256 _value
    ) internal override {
        _releaseTokens(nativeTokenAddress(_token) == address(0), _token, _recipient, _value, _value);
    }

    /**
     * @dev Allows to send to the other network the amount of locked tokens that can be forced into the contract
     * without the invocation of the required methods. (e. g. regular transfer without a call to onTokenTransfer)
     * @param _token address of the token contract.
     * Before calling this method, it must be carefully investigated how imbalance happened
     * in order to avoid an attempt to steal the funds from a token with double addresses
     * (e.g. TUSD is accessible at both 0x8dd5fbCe2F6a956C3022bA3663759011Dd51e73E and 0x0000000000085d4780B73119b644AE5ecd22b376)
     * @param _receiver the address that will receive the tokens on the other network.
     */
    function fixMediatorBalance(address _token, address _receiver)
        external
        onlyIfUpgradeabilityOwner
        validAddress(_receiver)
    {
        require(isRegisteredAsNativeToken(_token));

        uint256 diff = _unaccountedBalance(_token);
        require(diff > 0);
        uint256 available = maxAvailablePerTx(_token);
        require(available > 0);
        if (diff > available) {
            diff = available;
        }
        addTotalSpentPerDay(_token, getCurrentDay(), diff);

        bytes memory data = _prepareMessage(address(0), _token, _receiver, diff, new bytes(0));
        bytes32 _messageId = _passMessage(data);
        _recordBridgeOperation(_messageId, _token, _receiver, diff);
    }

    /**
     * @dev Claims stuck tokens. Only unsupported tokens can be claimed.
     * When dealing with already supported tokens, fixMediatorBalance can be used instead.
     * @param _token address of claimed token, address(0) for native
     * @param _to address of tokens receiver
     */
    function claimTokens(address _token, address _to) external onlyIfUpgradeabilityOwner {
        // Only unregistered tokens and native coins are allowed to be claimed with the use of this function
        require(_token == address(0) || !isTokenRegistered(_token));
        claimValues(_token, _to);
    }

    /**
     * @dev Withdraws erc20 tokens or native coins from the bridged token contract.
     * Only the proxy owner is allowed to call this method.
     * @param _bridgedToken address of the bridged token contract.
     * @param _token address of the claimed token or address(0) for native coins.
     * @param _to address of the tokens/coins receiver.
     */
    function claimTokensFromTokenContract(
        address _bridgedToken,
        address _token,
        address _to
    ) external onlyIfUpgradeabilityOwner {
        IBurnableMintableERC677Token(_bridgedToken).claimTokens(_token, _to);
    }

    /**
     * @dev Internal function for recording bridge operation for further usage.
     * Recorded information is used for fixing failed requests on the other side.
     * @param _messageId id of the sent message.
     * @param _token bridged token address.
     * @param _sender address of the tokens sender.
     * @param _value bridged value.
     */
    function _recordBridgeOperation(
        bytes32 _messageId,
        address _token,
        address _sender,
        uint256 _value
    ) internal {
        setMessageToken(_messageId, _token);
        setMessageRecipient(_messageId, _sender);
        setMessageValue(_messageId, _value);

        emit TokensBridgingInitiated(_token, _sender, _value, _messageId);
    }

    /**
     * @dev Constructs the message to be sent to the other side. Burns/locks bridged amount of tokens.
     * @param _nativeToken address of the native token contract.
     * @param _token bridged token address.
     * @param _receiver address of the tokens receiver on the other side.
     * @param _value bridged value.
     * @param _data additional transfer data passed from the other side.
     */
    function _prepareMessage(
        address _nativeToken,
        address _token,
        address _receiver,
        uint256 _value,
        bytes memory _data
    ) internal returns (bytes memory) {
        bool withData = _data.length > 0 || msg.sig == this.relayTokensAndCall.selector;

        // process token is native with respect to this side of the bridge
        if (_nativeToken == address(0)) {
            _setMediatorBalance(_token, mediatorBalance(_token).add(_value));
            return
                withData
                    ? abi.encodeWithSelector(this.handleBridgedTokensAndCall.selector, _token, _receiver, _value, _data)
                    : abi.encodeWithSelector(this.handleBridgedTokens.selector, _token, _receiver, _value);
        }

        // process already known token that is bridged from other chain
        IBurnableMintableERC677Token(_token).burn(_value);
        return
            withData
                ? abi.encodeWithSelector(
                    this.handleNativeTokensAndCall.selector,
                    _nativeToken,
                    _receiver,
                    _value,
                    _data
                )
                : abi.encodeWithSelector(this.handleNativeTokens.selector, _nativeToken, _receiver, _value);
    }

    /**
     * @dev Internal function for getting minter proxy address.
     * @param _token address of the token to mint.
     * @return address of the minter contract that should be used for calling mint(address,uint256)
     */
    function _getMinterFor(address _token) internal pure virtual returns (IBurnableMintableERC677Token) {
        return IBurnableMintableERC677Token(_token);
    }

    /**
     * Internal function for unlocking some amount of tokens.
     * @param _isNative true, if token is native w.r.t. to this side of the bridge.
     * @param _token address of the token contract.
     * @param _recipient address of the tokens receiver.
     * @param _value amount of tokens to unlock.
     * @param _balanceChange amount of balance to subtract from the mediator balance.
     */
    function _releaseTokens(
        bool _isNative,
        address _token,
        address _recipient,
        uint256 _value,
        uint256 _balanceChange
    ) internal virtual {
        if (_isNative) {
            IERC677(_token).safeTransfer(_recipient, _value);
            _setMediatorBalance(_token, mediatorBalance(_token).sub(_balanceChange));
        } else {
            _getMinterFor(_token).safeMint(_recipient, _value);
        }
    }

    /**
     * Notifies receiving contract about the completed bridging operation.
     * @param _recipient address of the tokens receiver.
     * @param _token address of the bridged token.
     * @param _value amount of tokens transferred.
     * @param _data additional data passed to the callback.
     */
    function _receiverCallback(
        address _recipient,
        address _token,
        uint256 _value,
        bytes memory _data
    ) internal {
        if (Address.isContract(_recipient)) {
            _recipient.call(abi.encodeWithSelector(IERC20Receiver.onTokenBridged.selector, _token, _value, _data));
        }
    }

    /**
     * @dev Internal function for counting excess balance which is not tracked within the bridge.
     * Represents the amount of forced tokens on this contract.
     * @param _token address of the token contract.
     * @return amount of excess tokens.
     */
    function _unaccountedBalance(address _token) internal view virtual returns (uint256) {
        return IERC677(_token).balanceOf(address(this)).sub(mediatorBalance(_token));
    }

    function _handleTokens(
        address _token,
        bool _isNative,
        address _recipient,
        uint256 _value
    ) internal virtual returns (uint256);

    function bridgeSpecificActionsOnTokenTransfer(
        address _token,
        address _from,
        address _receiver,
        uint256 _value,
        bytes memory _data
    ) internal virtual;
}

// File: contracts/upgradeable_contracts/components/common/GasLimitManager.sol

pragma solidity 0.7.5;


/**
 * @title GasLimitManager
 * @dev Functionality for determining the request gas limit for AMB execution.
 */
abstract contract GasLimitManager is BasicAMBMediator {
    bytes32 internal constant REQUEST_GAS_LIMIT = 0x2dfd6c9f781bb6bbb5369c114e949b69ebb440ef3d4dd6b2836225eb1dc3a2be; // keccak256(abi.encodePacked("requestGasLimit"))

    /**
     * @dev Sets the default gas limit to be used in the message execution by the AMB bridge on the other network.
     * This value can't exceed the parameter maxGasPerTx defined on the AMB bridge.
     * Only the owner can call this method.
     * @param _gasLimit the gas limit for the message execution.
     */
    function setRequestGasLimit(uint256 _gasLimit) external onlyOwner {
        _setRequestGasLimit(_gasLimit);
    }

    /**
     * @dev Tells the default gas limit to be used in the message execution by the AMB bridge on the other network.
     * @return the gas limit for the message execution.
     */
    function requestGasLimit() public view returns (uint256) {
        return uintStorage[REQUEST_GAS_LIMIT];
    }

    /**
     * @dev Stores the gas limit to be used in the message execution by the AMB bridge on the other network.
     * @param _gasLimit the gas limit for the message execution.
     */
    function _setRequestGasLimit(uint256 _gasLimit) internal {
        require(_gasLimit <= maxGasPerTx());
        uintStorage[REQUEST_GAS_LIMIT] = _gasLimit;
    }
}

// File: contracts/upgradeable_contracts/ForeignOmnibridge.sol

pragma solidity 0.7.5;




/**
 * @title ForeignOmnibridge
 * @dev Foreign side implementation for multi-token mediator intended to work on top of AMB bridge.
 * It is designed to be used as an implementation contract of EternalStorageProxy contract.
 */
contract ForeignOmnibridge is BasicOmnibridge, GasLimitManager {
    using SafeERC20 for IERC677;
    using SafeMint for IBurnableMintableERC677Token;
    using SafeMath for uint256;

    /**
     * @dev Stores the initial parameters of the mediator.
     * @param _bridgeContract the address of the AMB bridge contract.
     * @param _mediatorContract the address of the mediator contract on the other network.
     * @param _dailyLimitMaxPerTxMinPerTxArray array with limit values for the assets to be bridged to the other network.
     *   [ 0 = dailyLimit, 1 = maxPerTx, 2 = minPerTx ]
     * @param _executionDailyLimitExecutionMaxPerTxArray array with limit values for the assets bridged from the other network.
     *   [ 0 = executionDailyLimit, 1 = executionMaxPerTx ]
     * @param _requestGasLimit the gas limit for the message execution.
     * @param _owner address of the owner of the mediator contract.
     * @param _wplsContract address of the WPLS contract on Home side.
     * @param _bridgedWPLSContract address of the bridged WPLS contract on Foreign side.
     */
    function initialize(
        address _bridgeContract,
        address _mediatorContract,
        uint256[3] calldata _dailyLimitMaxPerTxMinPerTxArray, // [ 0 = _dailyLimit, 1 = _maxPerTx, 2 = _minPerTx ]
        uint256[2] calldata _executionDailyLimitExecutionMaxPerTxArray, // [ 0 = _executionDailyLimit, 1 = _executionMaxPerTx ]
        uint256 _requestGasLimit,
        address _owner,
        address _wplsContract,
        address _bridgedWPLSContract
    ) external onlyRelevantSender returns (bool) {
        require(!isInitialized());

        _setBridgeContract(_bridgeContract);
        _setMediatorContractOnOtherSide(_mediatorContract);
        _setLimits(address(0), _dailyLimitMaxPerTxMinPerTxArray);
        _setExecutionLimits(address(0), _executionDailyLimitExecutionMaxPerTxArray);
        _setRequestGasLimit(_requestGasLimit);
        _setOwner(_owner);
        _setWPLSContract(_wplsContract);

        _setTokenAddressPair(_wplsContract, _bridgedWPLSContract);
        _initializeTokenBridgeLimits(_bridgedWPLSContract, 18);

        setInitialize();

        return isInitialized();
    }

    /**
     * @dev Handles the bridged tokens.
     * Checks that the value is inside the execution limits and invokes the Mint or Unlock accordingly.
     * @param _token token contract address on this side of the bridge.
     * @param _isNative true, if given token is native to this chain and Unlock should be used.
     * @param _recipient address that will receive the tokens.
     * @param _value amount of tokens to be received.
     * @return _value amount as no fees dudcted on foreign side.
     */
    function _handleTokens(
        address _token,
        bool _isNative,
        address _recipient,
        uint256 _value
    ) internal override returns(uint256) {
        // prohibit withdrawal of tokens during other bridge operations (e.g. relayTokens)
        // such reentrant withdrawal can lead to an incorrect balanceDiff calculation
        require(!lock());

        require(withinExecutionLimit(_token, _value));
        addTotalExecutedPerDay(_token, getCurrentDay(), _value);

        _releaseTokens(_isNative, _token, _recipient, _value, _value);

        emit TokensBridged(_token, _recipient, _value, messageId());
        return (_value);
    }

    /**
     * @dev Executes action on deposit of bridged tokens
     * @param _token address of the token contract
     * @param _from address of tokens sender
     * @param _receiver address of tokens receiver on the other side
     * @param _value requested amount of bridged tokens
     * @param _data additional transfer data to be used on the other side
     */
    function bridgeSpecificActionsOnTokenTransfer(
        address _token,
        address _from,
        address _receiver,
        uint256 _value,
        bytes memory _data
    ) internal virtual override {
        require(_receiver != address(0) && _receiver != mediatorContractOnOtherSide());
        require(isTokenRegistered(_token));

        require(withinLimit(_token, _value));
        addTotalSpentPerDay(_token, getCurrentDay(), _value);

        bytes memory data = _prepareMessage(nativeTokenAddress(_token), _token, _receiver, _value, _data);
        bytes32 _messageId = _passMessage(data);
        _recordBridgeOperation(_messageId, _token, _from, _value);
    }

    /**
     * @dev Internal function for sending an AMB message to the mediator on the other side.
     * @param _data data to be sent to the other side of the bridge.
     * @return id of the sent message.
     */
    function _passMessage(bytes memory _data) internal override returns (bytes32) {
        return bridgeContract().requireToPassMessage(mediatorContractOnOtherSide(), _data, requestGasLimit());
    }
}

Contract Security Audit

No Contract Security Audit Submitted- Submit Audit Here

Contract ABI

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IAMB","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_nativeToken","type":"address"}],"name":"bridgedTokenAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_to","type":"address"}],"name":"claimTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_bridgedToken","type":"address"},{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_to","type":"address"}],"name":"claimTokensFromTokenContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"dailyLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"executionDailyLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"executionMaxPerTx","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_messageId","type":"bytes32"}],"name":"fixFailedMessage","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_receiver","type":"address"}],"name":"fixMediatorBalance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getBridgeInterfacesVersion","outputs":[{"internalType":"uint64","name":"major","type":"uint64"},{"internalType":"uint64","name":"minor","type":"uint64"},{"internalType":"uint64","name":"patch","type":"uint64"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getBridgeMode","outputs":[{"internalType":"bytes4","name":"_data","type":"bytes4"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getCurrentDay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"handleBridgedTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"handleBridgedTokensAndCall","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"handleNativeTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"handleNativeTokensAndCall","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_bridgeContract","type":"address"},{"internalType":"address","name":"_mediatorContract","type":"address"},{"internalType":"uint256[3]","name":"_dailyLimitMaxPerTxMinPerTxArray","type":"uint256[3]"},{"internalType":"uint256[2]","name":"_executionDailyLimitExecutionMaxPerTxArray","type":"uint256[2]"},{"internalType":"uint256","name":"_requestGasLimit","type":"uint256"},{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_wplsContract","type":"address"},{"internalType":"address","name":"_bridgedWPLSContract","type":"address"}],"name":"initialize","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"isBridgedTokenDeployAcknowledged","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isInitialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"isRegisteredAsNativeToken","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"isTokenRegistered","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"maxAvailablePerTx","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"maxPerTx","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"mediatorBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"mediatorContractOnOtherSide","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_messageId","type":"bytes32"}],"name":"messageFixed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"minPerTx","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_bridgedToken","type":"address"}],"name":"nativeTokenAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"onTokenTransfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC677","name":"token","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"relayTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC677","name":"token","type":"address"},{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"}],"name":"relayTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC677","name":"token","type":"address"},{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"uint256","name":"_value","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"relayTokensAndCall","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_messageId","type":"bytes32"}],"name":"requestFailedMessageFix","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"requestGasLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_bridgeContract","type":"address"}],"name":"setBridgeContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_dailyLimit","type":"uint256"}],"name":"setDailyLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_dailyLimit","type":"uint256"}],"name":"setExecutionDailyLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_maxPerTx","type":"uint256"}],"name":"setExecutionMaxPerTx","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_maxPerTx","type":"uint256"}],"name":"setMaxPerTx","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_mediatorContract","type":"address"}],"name":"setMediatorContractOnOtherSide","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_minPerTx","type":"uint256"}],"name":"setMinPerTx","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_gasLimit","type":"uint256"}],"name":"setRequestGasLimit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_wplsContract","type":"address"}],"name":"setWPLSContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_day","type":"uint256"}],"name":"totalExecutedPerDay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_day","type":"uint256"}],"name":"totalSpentPerDay","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withinExecutionLimit","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withinLimit","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"wplsContract","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

Contract Creation Code

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

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