// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

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

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

// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

interface IWZeta {
    function deposit() external payable;

    function withdraw(uint wad) external;

    function totalSupply() external view returns (uint);

    function approve(address guy, uint wad) external returns (bool);

    function transfer(address dst, uint wad) external returns (bool);

    function transferFrom(address src, address dst, uint wad) external returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@zetachain/protocol-contracts/contracts/evm/Zeta.eth.sol";
import "@zetachain/protocol-contracts/contracts/evm/tools/ZetaInteractor.sol";
import "@zetachain/protocol-contracts/contracts/evm/interfaces/ZetaInterfaces.sol";
import "../shared/IWZeta.sol";

/**
 * @dev Custom errors for contract MultiChainValue
 */
interface MultiChainValueErrors {
    error ErrorTransferringZeta();

    error ChainIdAlreadyEnabled();

    error ChainIdNotAvailable();

    error InvalidZetaValueAndGas();
}

/**
 * @dev MultiChainValue goal is to send Zeta token across all supported chains
 * Extends the logic defined in ZetaInteractor to handle multichain standards
 */
contract MultiChainValue is ZetaInteractor, MultiChainValueErrors {
    address public zetaToken;
    // @dev map of valid chains to send Zeta
    mapping(uint256 => bool) public availableChainIds;

    // @dev Constructor calls ZetaInteractor's constructor to setup Connector address and current chain
    constructor(address connectorAddress_, address zetaToken_) ZetaInteractor(connectorAddress_) {
        if (zetaToken_ == address(0)) revert ZetaCommonErrors.InvalidAddress();
        zetaToken = zetaToken_;
    }

    /**
     * @dev Whitelist a chain to send Zeta
     */
    function addAvailableChainId(uint256 destinationChainId) external onlyOwner {
        if (availableChainIds[destinationChainId]) revert ChainIdAlreadyEnabled();

        availableChainIds[destinationChainId] = true;
    }

    /**
     * @dev Blacklist a chain to send Zeta
     */
    function removeAvailableChainId(uint256 destinationChainId) external onlyOwner {
        if (!availableChainIds[destinationChainId]) revert ChainIdNotAvailable();

        delete availableChainIds[destinationChainId];
    }

    /**
     * @dev If the destination chain is a valid chain, send the Zeta tokens to that chain
     */
    function sendZeta(uint256 destinationChainId, bytes calldata destinationAddress) public payable {
        uint256 zetaValueAndGas = msg.value;

        if (!availableChainIds[destinationChainId]) revert InvalidDestinationChainId();
        if (zetaValueAndGas == 0) revert InvalidZetaValueAndGas();

        IWZeta(zetaToken).deposit{value: zetaValueAndGas}();
        bool success1 = ZetaEth(zetaToken).approve(address(connector), zetaValueAndGas);
        if (!success1) revert ErrorTransferringZeta();

        connector.send(
            ZetaInterfaces.SendInput({
                destinationChainId: destinationChainId,
                destinationAddress: destinationAddress,
                destinationGasLimit: 300000,
                message: abi.encode(msg.sender),
                zetaValueAndGas: zetaValueAndGas,
                zetaParams: abi.encode("")
            })
        );
    }

    /**
     * @dev If the destination chain is a valid chain, send the Zeta tokens to that chain
     */
    function send(uint256 destinationChainId, bytes calldata destinationAddress, uint256 zetaValueAndGas) external {
        if (!availableChainIds[destinationChainId]) revert InvalidDestinationChainId();
        if (zetaValueAndGas == 0) revert InvalidZetaValueAndGas();

        bool success1 = ZetaEth(zetaToken).approve(address(connector), zetaValueAndGas);
        bool success2 = ZetaEth(zetaToken).transferFrom(msg.sender, address(this), zetaValueAndGas);
        if (!(success1 && success2)) revert ErrorTransferringZeta();

        connector.send(
            ZetaInterfaces.SendInput({
                destinationChainId: destinationChainId,
                destinationAddress: destinationAddress,
                destinationGasLimit: 300000,
                message: abi.encode(msg.sender),
                zetaValueAndGas: zetaValueAndGas,
                zetaParams: abi.encode("")
            })
        );
    }

    function onZetaRevert(ZetaInterfaces.ZetaRevert calldata zetaRevert) external isValidRevertCall(zetaRevert) {
        address messageFrom = abi.decode(zetaRevert.message, (address));

        bool success1 = ZetaEth(zetaToken).approve(address(this), zetaRevert.remainingZetaValue);
        bool success2 = ZetaEth(zetaToken).transferFrom(address(this), messageFrom, zetaRevert.remainingZetaValue);
        if (!(success1 && success2)) revert ErrorTransferringZeta();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.0;

import "./Ownable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

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

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

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
        _transferOwnership(sender);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

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

/**
 * @dev ZetaEth is an implementation of OpenZeppelin's ERC20
 */
contract ZetaEth is ERC20("Zeta", "ZETA") {
    constructor(address creator, uint256 initialSupply) {
        _mint(creator, initialSupply * (10 ** uint256(decimals())));
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

import "@openzeppelin/contracts/access/Ownable2Step.sol";

import "../interfaces/ZetaInterfaces.sol";
import "../interfaces/ZetaInteractorErrors.sol";

abstract contract ZetaInteractor is Ownable2Step, ZetaInteractorErrors {
    bytes32 constant ZERO_BYTES = keccak256(new bytes(0));
    uint256 internal immutable currentChainId;
    ZetaConnector public immutable connector;

    /**
     * @dev Maps a chain id to its corresponding address of the MultiChainSwap contract
     * The address is expressed in bytes to allow non-EVM chains
     * This mapping is useful, mainly, for two reasons:
     *  - Given a chain id, the contract is able to route a transaction to its corresponding address
     *  - To check that the messages (onZetaMessage, onZetaRevert) come from a trusted source
     */
    mapping(uint256 => bytes) public interactorsByChainId;

    modifier isValidMessageCall(ZetaInterfaces.ZetaMessage calldata zetaMessage) {
        _isValidCaller();
        if (keccak256(zetaMessage.zetaTxSenderAddress) != keccak256(interactorsByChainId[zetaMessage.sourceChainId]))
            revert InvalidZetaMessageCall();
        _;
    }

    modifier isValidRevertCall(ZetaInterfaces.ZetaRevert calldata zetaRevert) {
        _isValidCaller();
        if (zetaRevert.zetaTxSenderAddress != address(this)) revert InvalidZetaRevertCall();
        if (zetaRevert.sourceChainId != currentChainId) revert InvalidZetaRevertCall();
        _;
    }

    constructor(address zetaConnectorAddress) {
        if (zetaConnectorAddress == address(0)) revert ZetaCommonErrors.InvalidAddress();
        currentChainId = block.chainid;
        connector = ZetaConnector(zetaConnectorAddress);
    }

    function _isValidCaller() private view {
        if (msg.sender != address(connector)) revert InvalidCaller(msg.sender);
    }

    /**
     * @dev Useful for contracts that inherit from this one
     */
    function _isValidChainId(uint256 chainId) internal view returns (bool) {
        return (keccak256(interactorsByChainId[chainId]) != ZERO_BYTES);
    }

    function setInteractorByChainId(uint256 destinationChainId, bytes calldata contractAddress) external onlyOwner {
        interactorsByChainId[destinationChainId] = contractAddress;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

/**
 * @dev Interface with Zeta Interactor errors
 */
interface ZetaInteractorErrors {
    // @dev Thrown when try to send a message or tokens to a non whitelisted chain
    error InvalidDestinationChainId();

    // @dev Thrown when the caller is invalid. e.g.: if onZetaMessage or onZetaRevert are not called by Connector
    error InvalidCaller(address caller);

    // @dev Thrown when message on onZetaMessage has the wrong format
    error InvalidZetaMessageCall();

    // @dev Thrown when message on onZetaRevert has the wrong format
    error InvalidZetaRevertCall();
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

interface ZetaInterfaces {
    /**
     * @dev Use SendInput to interact with the Connector: connector.send(SendInput)
     */
    struct SendInput {
        /// @dev Chain id of the destination chain. More about chain ids https://docs.zetachain.com/learn/glossary#chain-id
        uint256 destinationChainId;
        /// @dev Address receiving the message on the destination chain (expressed in bytes since it can be non-EVM)
        bytes destinationAddress;
        /// @dev Gas limit for the destination chain's transaction
        uint256 destinationGasLimit;
        /// @dev An encoded, arbitrary message to be parsed by the destination contract
        bytes message;
        /// @dev ZETA to be sent cross-chain + ZetaChain gas fees + destination chain gas fees (expressed in ZETA)
        uint256 zetaValueAndGas;
        /// @dev Optional parameters for the ZetaChain protocol
        bytes zetaParams;
    }

    /**
     * @dev Our Connector calls onZetaMessage with this struct as argument
     */
    struct ZetaMessage {
        bytes zetaTxSenderAddress;
        uint256 sourceChainId;
        address destinationAddress;
        /// @dev Remaining ZETA from zetaValueAndGas after subtracting ZetaChain gas fees and destination gas fees
        uint256 zetaValue;
        bytes message;
    }

    /**
     * @dev Our Connector calls onZetaRevert with this struct as argument
     */
    struct ZetaRevert {
        address zetaTxSenderAddress;
        uint256 sourceChainId;
        bytes destinationAddress;
        uint256 destinationChainId;
        /// @dev Equals to: zetaValueAndGas - ZetaChain gas fees - destination chain gas fees - source chain revert tx gas fees
        uint256 remainingZetaValue;
        bytes message;
    }
}

interface ZetaConnector {
    /**
     * @dev Sending value and data cross-chain is as easy as calling connector.send(SendInput)
     */
    function send(ZetaInterfaces.SendInput calldata input) external;
}

interface ZetaReceiver {
    /**
     * @dev onZetaMessage is called when a cross-chain message reaches a contract
     */
    function onZetaMessage(ZetaInterfaces.ZetaMessage calldata zetaMessage) external;

    /**
     * @dev onZetaRevert is called when a cross-chain message reverts.
     * It's useful to rollback to the original state
     */
    function onZetaRevert(ZetaInterfaces.ZetaRevert calldata zetaRevert) external;
}

/**
 * @dev ZetaTokenConsumer makes it easier to handle the following situations:
 *   - Getting Zeta using native coin (to pay for destination gas while using `connector.send`)
 *   - Getting Zeta using a token (to pay for destination gas while using `connector.send`)
 *   - Getting native coin using Zeta (to return unused destination gas when `onZetaRevert` is executed)
 *   - Getting a token using Zeta (to return unused destination gas when `onZetaRevert` is executed)
 * @dev The interface can be implemented using different strategies, like UniswapV2, UniswapV3, etc
 */
interface ZetaTokenConsumer {
    event EthExchangedForZeta(uint256 amountIn, uint256 amountOut);
    event TokenExchangedForZeta(address token, uint256 amountIn, uint256 amountOut);
    event ZetaExchangedForEth(uint256 amountIn, uint256 amountOut);
    event ZetaExchangedForToken(address token, uint256 amountIn, uint256 amountOut);

    function getZetaFromEth(address destinationAddress, uint256 minAmountOut) external payable returns (uint256);

    function getZetaFromToken(
        address destinationAddress,
        uint256 minAmountOut,
        address inputToken,
        uint256 inputTokenAmount
    ) external returns (uint256);

    function getEthFromZeta(
        address destinationAddress,
        uint256 minAmountOut,
        uint256 zetaTokenAmount
    ) external returns (uint256);

    function getTokenFromZeta(
        address destinationAddress,
        uint256 minAmountOut,
        address outputToken,
        uint256 zetaTokenAmount
    ) external returns (uint256);

    function hasZetaLiquidity() external view returns (bool);
}

interface ZetaCommonErrors {
    error InvalidAddress();
}

{
  "compilationTarget": {
    "contracts/multi-chain-value/MultiChainValue.sol": "MultiChainValue"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}