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//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

import "./IERC20.sol";
import "./IERC20_Bridge_Logic_Restricted.sol";
import "./IMultisigControl.sol";
import "./ERC20_Asset_Pool.sol";

/// @title ERC20 Bridge Logic
/// @author Vega Protocol
/// @notice This contract is used by Vega network users to deposit and withdraw ERC20 tokens to/from Vega.
// @notice All funds deposited/withdrawn are to/from the assigned ERC20_Asset_Pool
contract ERC20_Bridge_Logic_Restricted is IERC20_Bridge_Logic_Restricted {
    address payable public erc20_asset_pool_address;
    // asset address => is listed
    mapping(address => bool) listed_tokens;
    // Vega asset ID => asset_source
    mapping(bytes32 => address) vega_asset_ids_to_source;
    // asset_source => Vega asset ID
    mapping(address => bytes32) asset_source_to_vega_asset_id;

    /// @param erc20_asset_pool Initial Asset Pool contract address
    constructor(address payable erc20_asset_pool) {
        require(erc20_asset_pool != address(0), "invalid asset pool address");
        erc20_asset_pool_address = erc20_asset_pool;
    }

    function multisig_control_address() internal view returns (address) {
        return ERC20_Asset_Pool(erc20_asset_pool_address).multisig_control_address();
    }

    /***************************FUNCTIONS*************************/
    /// @notice This function lists the given ERC20 token contract as valid for deposit to this bridge
    /// @param asset_source Contract address for given ERC20 token
    /// @param vega_asset_id Vega-generated asset ID for internal use in Vega Core
    /// @param lifetime_limit Initial lifetime deposit limit *RESTRICTION FEATURE*
    /// @param withdraw_threshold Amount at which the withdraw delay goes into effect *RESTRICTION FEATURE*
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits Asset_Listed if successful
    function list_asset(
        address asset_source,
        bytes32 vega_asset_id,
        uint256 lifetime_limit,
        uint256 withdraw_threshold,
        uint256 nonce,
        bytes memory signatures
    ) external override {
        require(asset_source != address(0), "invalid asset source");
        require(!listed_tokens[asset_source], "asset already listed");
        bytes memory message = abi.encode(
            asset_source,
            vega_asset_id,
            lifetime_limit,
            withdraw_threshold,
            nonce,
            "list_asset"
        );
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        listed_tokens[asset_source] = true;
        vega_asset_ids_to_source[vega_asset_id] = asset_source;
        asset_source_to_vega_asset_id[asset_source] = vega_asset_id;
        asset_deposit_lifetime_limit[asset_source] = lifetime_limit;
        withdraw_thresholds[asset_source] = withdraw_threshold;
        emit Asset_Listed(asset_source, vega_asset_id, nonce);
    }

    /// @notice This function removes from listing the given ERC20 token contract. This marks the token as invalid for deposit to this bridge
    /// @param asset_source Contract address for given ERC20 token
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits Asset_Removed if successful
    function remove_asset(
        address asset_source,
        uint256 nonce,
        bytes memory signatures
    ) external override {
        require(listed_tokens[asset_source], "asset not listed");
        bytes memory message = abi.encode(asset_source, nonce, "remove_asset");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        listed_tokens[asset_source] = false;
        emit Asset_Removed(asset_source, nonce);
    }

    /************************RESTRICTIONS***************************/
    // user => asset_source => deposit total
    mapping(address => mapping(address => uint256)) user_lifetime_deposits;
    // asset_source => deposit_limit
    mapping(address => uint256) asset_deposit_lifetime_limit;
    uint256 public default_withdraw_delay = 432000;
    // asset_source => threshold
    mapping(address => uint256) withdraw_thresholds;
    bool public is_stopped;

    // depositor => is exempt from deposit limits
    mapping(address => bool) exempt_depositors;

    /// @notice This function sets the lifetime maximum deposit for a given asset
    /// @param asset_source Contract address for given ERC20 token
    /// @param lifetime_limit Deposit limit for a given ethereum address
    /// @param threshold Withdraw size above which the withdraw delay goes into effect
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @dev asset must first be listed
    function set_asset_limits(
        address asset_source,
        uint256 lifetime_limit,
        uint256 threshold,
        uint256 nonce,
        bytes calldata signatures
    ) external override {
        require(listed_tokens[asset_source], "asset not listed");
        bytes memory message = abi.encode(asset_source, lifetime_limit, threshold, nonce, "set_asset_limits");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        asset_deposit_lifetime_limit[asset_source] = lifetime_limit;
        withdraw_thresholds[asset_source] = threshold;

        emit Asset_Limits_Updated(asset_source, lifetime_limit, threshold);
    }

    /// @notice This view returns the lifetime deposit limit for the given asset
    /// @param asset_source Contract address for given ERC20 token
    /// @return Lifetime limit for the given asset
    function get_asset_deposit_lifetime_limit(address asset_source) external view override returns (uint256) {
        return asset_deposit_lifetime_limit[asset_source];
    }

    /// @notice This view returns the given token's withdraw threshold above which the withdraw delay goes into effect
    /// @param asset_source Contract address for given ERC20 token
    /// @return Withdraw threshold
    function get_withdraw_threshold(address asset_source) external view override returns (uint256) {
        return withdraw_thresholds[asset_source];
    }

    /// @notice This function sets the withdraw delay for withdrawals over the per-asset set thresholds
    /// @param delay Amount of time to delay a withdrawal
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    function set_withdraw_delay(
        uint256 delay,
        uint256 nonce,
        bytes calldata signatures
    ) external override {
        bytes memory message = abi.encode(delay, nonce, "set_withdraw_delay");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        default_withdraw_delay = delay;
        emit Bridge_Withdraw_Delay_Set(delay);
    }

    /// @notice This function triggers the global bridge stop that halts all withdrawals and deposits until it is resumed
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @dev bridge must not be stopped already
    /// @dev emits Bridge_Stopped if successful
    function global_stop(uint256 nonce, bytes calldata signatures) external override {
        require(!is_stopped, "bridge already stopped");
        bytes memory message = abi.encode(nonce, "global_stop");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        is_stopped = true;
        emit Bridge_Stopped();
    }

    /// @notice This function resumes bridge operations from the stopped state
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @dev bridge must be stopped
    /// @dev emits Bridge_Resumed if successful
    function global_resume(uint256 nonce, bytes calldata signatures) external override {
        require(is_stopped, "bridge not stopped");
        bytes memory message = abi.encode(nonce, "global_resume");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        is_stopped = false;
        emit Bridge_Resumed();
    }

    /// @notice this function allows the sender to exempt themselves from the deposit limits
    /// @notice this feature is specifically for liquidity and rewards providers
    /// @dev emits Depositor_Exempted if successful
    function exempt_depositor() external override {
        require(!exempt_depositors[msg.sender], "sender already exempt");
        exempt_depositors[msg.sender] = true;
        emit Depositor_Exempted(msg.sender);
    }

    /// @notice this function allows the exemption_lister to revoke a depositor's exemption from deposit limits
    /// @notice this feature is specifically for liquidity and rewards providers
    /// @dev emits Depositor_Exemption_Revoked if successful
    function revoke_exempt_depositor() external override {
        require(exempt_depositors[msg.sender], "sender not exempt");
        exempt_depositors[msg.sender] = false;
        emit Depositor_Exemption_Revoked(msg.sender);
    }

    /// @notice this view returns true if the given despoitor address has been exempted from deposit limits
    /// @param depositor The depositor to check
    /// @return true if depositor is exempt
    function is_exempt_depositor(address depositor) external view override returns (bool) {
        return exempt_depositors[depositor];
    }

    /***********************END RESTRICTIONS*************************/

    /// @notice This function withdraws assets to the target Ethereum address
    /// @param asset_source Contract address for given ERC20 token
    /// @param amount Amount of ERC20 tokens to withdraw
    /// @param target Target Ethereum address to receive withdrawn ERC20 tokens
    /// @param creation Timestamp of when requestion was created *RESTRICTION FEATURE*
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits Asset_Withdrawn if successful
    function withdraw_asset(
        address asset_source,
        uint256 amount,
        address target,
        uint256 creation,
        uint256 nonce,
        bytes memory signatures
    ) external override {
        require(!is_stopped, "bridge stopped");
        require(
            withdraw_thresholds[asset_source] > amount || creation + default_withdraw_delay <= block.timestamp,
            "large withdraw is not old enough"
        );
        bytes memory message = abi.encode(asset_source, amount, target, creation, nonce, "withdraw_asset");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        ERC20_Asset_Pool(erc20_asset_pool_address).withdraw(asset_source, target, amount);
        emit Asset_Withdrawn(target, asset_source, amount, nonce);
    }

    /// @notice This function allows a user to deposit given ERC20 tokens into Vega
    /// @param asset_source Contract address for given ERC20 token
    /// @param amount Amount of tokens to be deposited into Vega
    /// @param vega_public_key Target Vega public key to be credited with this deposit
    /// @dev emits Asset_Deposited if successful
    /// @dev ERC20 approve function should be run before running this
    /// @notice ERC20 approve function should be run before running this
    function deposit_asset(
        address asset_source,
        uint256 amount,
        bytes32 vega_public_key
    ) external override {
        require(!is_stopped, "bridge stopped");

        if (!exempt_depositors[msg.sender]) {
            require(
                user_lifetime_deposits[msg.sender][asset_source] + amount <= asset_deposit_lifetime_limit[asset_source],
                "deposit over lifetime limit"
            );
            user_lifetime_deposits[msg.sender][asset_source] += amount;
        }

        require(listed_tokens[asset_source], "asset not listed");
        require(is_contract(asset_source), "asset_source must be contract");

        (bool success, bytes memory returndata) = asset_source.call(
            abi.encodeWithSignature(
                "transferFrom(address,address,uint256)",
                msg.sender,
                erc20_asset_pool_address,
                amount
            )
        );
        require(success, "token transfer failed");

        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "token transfer failed");
        }

        emit Asset_Deposited(msg.sender, asset_source, amount, vega_public_key);
    }

    /***************************VIEWS*****************************/
    /// @notice This view returns true if the given ERC20 token contract has been listed valid for deposit
    /// @param asset_source Contract address for given ERC20 token
    /// @return True if asset is listed
    function is_asset_listed(address asset_source) external view override returns (bool) {
        return listed_tokens[asset_source];
    }

    /// @return current multisig_control_address
    function get_multisig_control_address() external view override returns (address) {
        return multisig_control_address();
    }

    /// @param asset_source Contract address for given ERC20 token
    /// @return The assigned Vega Asset Id for given ERC20 token
    function get_vega_asset_id(address asset_source) external view override returns (bytes32) {
        return asset_source_to_vega_asset_id[asset_source];
    }

    /// @param vega_asset_id Vega-assigned asset ID for which you want the ERC20 token address
    /// @return The ERC20 token contract address for a given Vega Asset Id
    function get_asset_source(bytes32 vega_asset_id) external view override returns (address) {
        return vega_asset_ids_to_source[vega_asset_id];
    }

    function is_contract(address addr) internal view returns (bool) {
        uint256 code_size;
        assembly {
            code_size := extcodesize(addr)
        }
        return code_size > 0;
    }
}

/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/

//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

import "./IMultisigControl.sol";
import "./IERC20.sol";

/// @title ERC20 Asset Pool
/// @author Vega Protocol
/// @notice This contract is the target for all deposits to the ERC20 Bridge via ERC20_Bridge_Logic
contract ERC20_Asset_Pool {
    event Multisig_Control_Set(address indexed new_address);
    event Bridge_Address_Set(address indexed new_address);

    /// @return Current MultisigControl contract address
    address public multisig_control_address;

    /// @return Current ERC20_Bridge_Logic contract address
    address public erc20_bridge_address;

    /// @param multisig_control The initial MultisigControl contract address
    /// @notice Emits Multisig_Control_Set event
    constructor(address multisig_control) {
        require(multisig_control != address(0), "invalid MultisigControl address");
        multisig_control_address = multisig_control;
        emit Multisig_Control_Set(multisig_control);
    }

    /// @notice this contract is not intended to accept ether directly
    receive() external payable {
        revert("this contract does not accept ETH");
    }

    /// @param new_address The new MultisigControl contract address.
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed set_multisig_control order
    /// @notice See MultisigControl for more about signatures
    /// @notice Emits Multisig_Control_Set event
    function set_multisig_control(
        address new_address,
        uint256 nonce,
        bytes memory signatures
    ) external {
        require(new_address != address(0), "invalid MultisigControl address");
        require(is_contract(new_address), "new address must be contract");

        bytes memory message = abi.encode(new_address, nonce, "set_multisig_control");
        require(
            IMultisigControl(multisig_control_address).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        multisig_control_address = new_address;
        emit Multisig_Control_Set(new_address);
    }

    /// @param new_address The new ERC20_Bridge_Logic contract address.
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed set_bridge_address order
    /// @notice See MultisigControl for more about signatures
    /// @notice Emits Bridge_Address_Set event
    function set_bridge_address(
        address new_address,
        uint256 nonce,
        bytes memory signatures
    ) external {
        bytes memory message = abi.encode(new_address, nonce, "set_bridge_address");
        require(
            IMultisigControl(multisig_control_address).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        erc20_bridge_address = new_address;
        emit Bridge_Address_Set(new_address);
    }

    /// @notice This function can only be run by the current "multisig_control_address" and, if available, will send the target tokens to the target
    /// @param token_address Contract address of the ERC20 token to be withdrawn
    /// @param target Target Ethereum address that the ERC20 tokens will be sent to
    /// @param amount Amount of ERC20 tokens to withdraw
    /// @dev amount is in whatever the lowest decimal value the ERC20 token has. For instance, an 18 decimal ERC20 token, 1 "amount" == 0.000000000000000001
    function withdraw(
        address token_address,
        address target,
        uint256 amount
    ) external {
        require(msg.sender == erc20_bridge_address, "msg.sender not authorized bridge");
        require(is_contract(token_address), "token_address must be contract");

        (bool success, bytes memory returndata) = token_address.call(
            abi.encodeWithSignature("transfer(address,uint256)", target, amount)
        );
        require(success, "token transfer failed");

        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "token transfer failed");
        }
    }

    function is_contract(address addr) internal view returns (bool) {
        uint256 code_size;
        assembly {
            code_size := extcodesize(addr)
        }
        return code_size > 0;
    }
}

/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/

//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

import "./IMultisigControl.sol";

/// @title ETH Asset Pool
/// @author Vega Protocol
/// @notice This contract is the target for all deposits to the ETH Bridge via ETH_Bridge_Logic
contract ETH_Asset_Pool {
    event Multisig_Control_Set(address indexed new_address);
    event Bridge_Address_Set(address indexed new_address);
    event Received(address indexed sender, uint256 amount);

    /// @return Current MultisigControl contract address
    address public multisig_control_address;

    /// @return Current ETH_Bridge_Logic contract address
    address public ETH_bridge_address;

    /// @param multisig_control The initial MultisigControl contract address
    /// @notice Emits Multisig_Control_Set event
    constructor(address multisig_control) {
        require(multisig_control != address(0), "invalid MultisigControl address");
        multisig_control_address = multisig_control;
        emit Multisig_Control_Set(multisig_control);
    }

    /// @param new_address The new MultisigControl contract address.
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed set_multisig_control order
    /// @notice See MultisigControl for more about signatures
    /// @notice Emits Multisig_Control_Set event
    function set_multisig_control(
        address new_address,
        uint256 nonce,
        bytes memory signatures
    ) external {
        require(new_address != address(0), "invalid MultisigControl address");
        uint256 size;
        assembly {
            size := extcodesize(new_address)
        }
        require(size > 0, "new address must be contract");
        bytes memory message = abi.encode(new_address, nonce, "set_multisig_control");
        require(
            IMultisigControl(multisig_control_address).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        multisig_control_address = new_address;
        emit Multisig_Control_Set(new_address);
    }

    /// @param new_address The new ETH_Bridge_Logic contract address.
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed set_bridge_address order
    /// @notice See MultisigControl for more about signatures
    /// @notice Emits Bridge_Address_Set event
    function set_bridge_address(
        address new_address,
        uint256 nonce,
        bytes memory signatures
    ) external {
        require(new_address != address(0), "invalid bridge address");
        bytes memory message = abi.encode(new_address, nonce, "set_bridge_address");
        require(
            IMultisigControl(multisig_control_address).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        ETH_bridge_address = new_address;
        emit Bridge_Address_Set(new_address);
    }

    /// @notice This function can only be run by the current "multisig_control_address" and, if available, will send the target eth to the target
    /// @param target Target Ethereum address that the ETH will be sent to
    /// @param amount Amount of ETH to withdraw
    /// @dev amount is in wei, 1 wei == 0.000000000000000001 ETH
    function withdraw(address payable target, uint256 amount) external {
        require(target != address(0), "invalid target address");
        require(msg.sender == ETH_bridge_address, "msg.sender not authorized bridge");
        /// @dev reentry is protected by the non-reusable nonce in the signature check in the ETH_Bridge_Logic
        (bool success, ) = target.call{value: amount}("");
        require(success, "eth transfer failed");
    }

    /// @notice A contract can have at most one receive function,
    /// declared using receive() external payable { ... }
    /// (without the function keyword). This function cannot have arguments,
    /// cannot return anything and must have external visibility and payable state
    /// mutability. It is executed on a call to the contract with empty calldata.
    /// This is the function that is executed on plain Ether transfers (e.g. via .send()
    /// or .transfer()). If no such function exists, but a payable fallback
    /// function exists, the fallback function will be called on a plain Ether
    /// transfer. If neither a receive Ether nor a payable fallback function is
    /// present, the contract cannot receive Ether through regular transactions
    /// and throws an exception.
    receive() external payable {
        emit Received(msg.sender, msg.value);
    }
}

/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/

//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

import "./IETH_Bridge_Logic.sol";
import "./IMultisigControl.sol";
import "./ETH_Asset_Pool.sol";

/// @title ETH Bridge Logic
/// @author Vega Protocol
/// @notice This contract is used by Vega network users to deposit and withdraw ETH to/from Vega.
// @notice All funds deposited/withdrawn are to/from the assigned ETH_Asset_Pool
contract ETH_Bridge_Logic is IETH_Bridge_Logic {
    address payable ETH_asset_pool_address;

    // minimum deposit amt
    uint256 minimum_deposit;
    // maximum deposit amt
    uint256 maximum_deposit;

    /// @param ETH_asset_pool Initial Asset Pool contract address
    constructor(address payable ETH_asset_pool) {
        require(ETH_asset_pool != address(0), "invalid asset pool address");
        ETH_asset_pool_address = ETH_asset_pool;
    }

    function multisig_control_address() internal view returns (address) {
        return ETH_Asset_Pool(ETH_asset_pool_address).multisig_control_address();
    }

    /// @notice This function sets the minimum allowable deposit for ETH
    /// @param minimum_amount Minimum deposit amount
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits ETH_Deposit_Minimum_Set if successful
    function set_deposit_minimum(
        uint256 minimum_amount,
        uint256 nonce,
        bytes memory signatures
    ) external override {
        bytes memory message = abi.encode(minimum_amount, nonce, "set_deposit_minimum");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        minimum_deposit = minimum_amount;
        emit ETH_Deposit_Minimum_Set(minimum_amount, nonce);
    }

    /// @notice This function sets the maximum allowable deposit for ETH
    /// @param maximum_amount Maximum deposit amount
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits ETH_Deposit_Maximum_Set if successful
    function set_deposit_maximum(
        uint256 maximum_amount,
        uint256 nonce,
        bytes memory signatures
    ) external override {
        bytes memory message = abi.encode(maximum_amount, nonce, "set_deposit_maximum");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        maximum_deposit = maximum_amount;
        emit ETH_Deposit_Maximum_Set(maximum_amount, nonce);
    }

    /// @notice This function allows the withdrawal of ETH
    /// @param amount Amount of ETH to withdraw
    /// @param expiry Vega-assigned timestamp of withdrawal order expiration
    /// @param target Target Ethereum address to receive withdrawn ETH
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits ETH_Withdrawn if successful
    function withdraw_asset(
        uint256 amount,
        uint256 expiry,
        address payable target,
        uint256 nonce,
        bytes memory signatures
    ) external override {
        require(expiry > block.timestamp, "withdrawal has expired");
        bytes memory message = abi.encode(amount, expiry, target, nonce, "withdraw_asset");
        require(
            IMultisigControl(multisig_control_address()).verify_signatures(signatures, message, nonce),
            "bad signatures"
        );
        ETH_Asset_Pool(ETH_asset_pool_address).withdraw(target, amount);
        emit ETH_Withdrawn(target, amount, nonce);
    }

    /// @notice This function allows a user to deposit ETH into Vega
    /// @param vega_public_key Target vega public key to be credited with this deposit
    /// @dev Emits ETH_Deposited if successful
    function deposit_asset(bytes32 vega_public_key) external payable override {
        require(maximum_deposit == 0 || msg.value <= maximum_deposit, "deposit above maximum");
        require(msg.value >= minimum_deposit, "deposit below minimum");
        ETH_asset_pool_address.transfer(msg.value);
        emit ETH_Deposited(msg.sender, msg.value, vega_public_key);
    }

    /***************************VIEWS*****************************/
    /// @notice This view returns minimum valid deposit
    /// @return Minimum valid deposit of ETH
    function get_deposit_minimum() external view override returns (uint256) {
        return minimum_deposit;
    }

    /// @notice This view returns maximum valid deposit
    /// @return Maximum valid deposit of ETH
    function get_deposit_maximum() external view override returns (uint256) {
        return maximum_deposit;
    }

    /// @return current multisig_control_address
    function get_multisig_control_address() external view override returns (address) {
        return multisig_control_address();
    }
}

/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/

//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

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

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

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

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

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

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

//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

/// @title ERC20 Bridge Logic Interface
/// @author Vega Protocol
/// @notice Implementations of this interface are used by Vega network users to deposit and withdraw ERC20 tokens to/from Vega.
// @notice All funds deposited/withdrawn are to/from the ERC20_Asset_Pool
abstract contract IERC20_Bridge_Logic_Restricted {
    /***************************EVENTS****************************/
    event Asset_Withdrawn(address indexed user_address, address indexed asset_source, uint256 amount, uint256 nonce);
    event Asset_Deposited(
        address indexed user_address,
        address indexed asset_source,
        uint256 amount,
        bytes32 vega_public_key
    );
    event Asset_Listed(address indexed asset_source, bytes32 indexed vega_asset_id, uint256 nonce);
    event Asset_Removed(address indexed asset_source, uint256 nonce);
    event Asset_Limits_Updated(address indexed asset_source, uint256 lifetime_limit, uint256 withdraw_threshold);
    event Bridge_Withdraw_Delay_Set(uint256 withdraw_delay);
    event Bridge_Stopped();
    event Bridge_Resumed();
    event Depositor_Exempted(address indexed depositor);
    event Depositor_Exemption_Revoked(address indexed depositor);

    /***************************FUNCTIONS*************************/
    /// @notice This function lists the given ERC20 token contract as valid for deposit to this bridge
    /// @param asset_source Contract address for given ERC20 token
    /// @param vega_asset_id Vega-generated asset ID for internal use in Vega Core
    /// @param lifetime_limit Initial lifetime deposit limit *RESTRICTION FEATURE*
    /// @param withdraw_threshold Amount at which the withdraw delay goes into effect *RESTRICTION FEATURE*
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev MUST emit Asset_Listed if successful
    function list_asset(
        address asset_source,
        bytes32 vega_asset_id,
        uint256 lifetime_limit,
        uint256 withdraw_threshold,
        uint256 nonce,
        bytes memory signatures
    ) external virtual;

    /// @notice This function removes from listing the given ERC20 token contract. This marks the token as invalid for deposit to this bridge
    /// @param asset_source Contract address for given ERC20 token
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev MUST emit Asset_Removed if successful
    function remove_asset(
        address asset_source,
        uint256 nonce,
        bytes memory signatures
    ) external virtual;

    /// @notice This function sets the lifetime maximum deposit for a given asset
    /// @param asset_source Contract address for given ERC20 token
    /// @param lifetime_limit Deposit limit for a given ethereum address
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @dev asset must first be listed
    function set_asset_limits(
        address asset_source,
        uint256 lifetime_limit,
        uint256 threshold,
        uint256 nonce,
        bytes calldata signatures
    ) external virtual;

    /// @notice This function sets the withdraw delay for withdrawals over the per-asset set thresholds
    /// @param delay Amount of time to delay a withdrawal
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    function set_withdraw_delay(
        uint256 delay,
        uint256 nonce,
        bytes calldata signatures
    ) external virtual;

    /// @notice This function triggers the global bridge stop that halts all withdrawals and deposits until it is resumed
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @dev bridge must not be stopped already
    /// @dev MUST emit Bridge_Stopped if successful
    function global_stop(uint256 nonce, bytes calldata signatures) external virtual;

    /// @notice This function resumes bridge operations from the stopped state
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @dev bridge must be stopped
    /// @dev MUST emit Bridge_Resumed if successful
    function global_resume(uint256 nonce, bytes calldata signatures) external virtual;

    /// @notice this function allows the exemption_lister to exempt a depositor from the deposit limits
    /// @notice this feature is specifically for liquidity and rewards providers
    /// @dev MUST emit Depositor_Exempted if successful
    function exempt_depositor() external virtual;

    /// @notice this function allows the exemption_lister to revoke a depositor's exemption from deposit limits
    /// @notice this feature is specifically for liquidity and rewards providers
    /// @dev MUST emit Depositor_Exemption_Revoked if successful
    function revoke_exempt_depositor() external virtual;

    /// @notice This function withdrawals assets to the target Ethereum address
    /// @param asset_source Contract address for given ERC20 token
    /// @param amount Amount of ERC20 tokens to withdraw
    /// @param target Target Ethereum address to receive withdrawn ERC20 tokens
    /// @param creation Timestamp of when requestion was created *RESTRICTION FEATURE*
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev MUST emit Asset_Withdrawn if successful
    function withdraw_asset(
        address asset_source,
        uint256 amount,
        address target,
        uint256 creation,
        uint256 nonce,
        bytes memory signatures
    ) external virtual;

    /// @notice this view returns true if the given despoitor address has been exempted from deposit limits
    /// @param depositor The depositor to check
    /// @return true if depositor is exempt
    function is_exempt_depositor(address depositor) external view virtual returns (bool);

    /// @notice This function allows a user to deposit given ERC20 tokens into Vega
    /// @param asset_source Contract address for given ERC20 token
    /// @param amount Amount of tokens to be deposited into Vega
    /// @param vega_public_key Target Vega public key to be credited with this deposit
    /// @dev MUST emit Asset_Deposited if successful
    /// @dev ERC20 approve function should be run before running this
    /// @notice ERC20 approve function should be run before running this
    function deposit_asset(
        address asset_source,
        uint256 amount,
        bytes32 vega_public_key
    ) external virtual;

    /***************************VIEWS*****************************/
    /// @notice This view returns true if the given ERC20 token contract has been listed valid for deposit
    /// @param asset_source Contract address for given ERC20 token
    /// @return True if asset is listed
    function is_asset_listed(address asset_source) external view virtual returns (bool);

    /// @notice This view returns the lifetime deposit limit for the given asset
    /// @param asset_source Contract address for given ERC20 token
    /// @return Lifetime limit for the given asset
    function get_asset_deposit_lifetime_limit(address asset_source) external view virtual returns (uint256);

    /// @notice This view returns the given token's withdraw threshold above which the withdraw delay goes into effect
    /// @param asset_source Contract address for given ERC20 token
    /// @return Withdraw threshold
    function get_withdraw_threshold(address asset_source) external view virtual returns (uint256);

    /// @return current multisig_control_address
    function get_multisig_control_address() external view virtual returns (address);

    /// @param asset_source Contract address for given ERC20 token
    /// @return The assigned Vega Asset ID for given ERC20 token
    function get_vega_asset_id(address asset_source) external view virtual returns (bytes32);

    /// @param vega_asset_id Vega-assigned asset ID for which you want the ERC20 token address
    /// @return The ERC20 token contract address for a given Vega Asset ID
    function get_asset_source(bytes32 vega_asset_id) external view virtual returns (address);
}

/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/

//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

/// @title ETH Bridge Logic Interface
/// @author Vega Protocol
/// @notice Implementations of this interface are used by Vega network users to deposit and withdraw ETH to/from Vega.
// @notice All funds deposited/withdrawn are to/from the ETH_Asset_Pool
abstract contract IETH_Bridge_Logic {
    /***************************EVENTS****************************/
    event ETH_Withdrawn(address indexed user_address, uint256 amount, uint256 nonce);
    event ETH_Deposited(address indexed user_address, uint256 amount, bytes32 vega_public_key);
    event ETH_Deposit_Minimum_Set(uint256 new_minimum, uint256 nonce);
    event ETH_Deposit_Maximum_Set(uint256 new_maximum, uint256 nonce);

    /***************************FUNCTIONS*************************/
    /// @notice This function sets the minimum allowable deposit for ETH
    /// @param minimum_amount Minimum deposit amount
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev MUST emit Asset_Deposit_Minimum_Set if successful
    function set_deposit_minimum(
        uint256 minimum_amount,
        uint256 nonce,
        bytes memory signatures
    ) external virtual;

    /// @notice This function sets the maximum allowable deposit for ETH
    /// @param maximum_amount Maximum deposit amount
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev MUST emit Asset_Deposit_Maximum_Set if successful
    function set_deposit_maximum(
        uint256 maximum_amount,
        uint256 nonce,
        bytes memory signatures
    ) external virtual;

    /// @notice This function withdraws assets to the target Ethereum address
    /// @param amount Amount of ETH to withdraw
    /// @param expiry Vega-assigned timestamp of withdrawal order expiration
    /// @param target Target Ethereum address to receive withdrawn ETH
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev MUST emit Asset_Withdrawn if successful
    function withdraw_asset(
        uint256 amount,
        uint256 expiry,
        address payable target,
        uint256 nonce,
        bytes memory signatures
    ) external virtual;

    /// @notice This function allows a user to deposit ETH into Vega
    /// @param vega_public_key Target vega public key to be credited with this deposit
    /// @dev MUST emit Asset_Deposited if successful
    /// @dev ETH approve function should be run before running this
    /// @notice ETH approve function should be run before running this
    function deposit_asset(bytes32 vega_public_key) external payable virtual;

    /***************************VIEWS*****************************/
    /// @notice This view returns minimum valid deposit
    /// @return Minimum valid deposit of ETH
    function get_deposit_minimum() external view virtual returns (uint256);

    /// @notice This view returns maximum valid deposit
    /// @return Maximum valid deposit of ETH
    function get_deposit_maximum() external view virtual returns (uint256);

    /// @return current multisig_control_address
    function get_multisig_control_address() external view virtual returns (address);
}

/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/

//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

/// @title MultisigControl Interface
/// @author Vega Protocol
/// @notice Implementations of this interface are used by the Vega network to control smart contracts without the need for Vega to have any Ethereum of its own.
/// @notice To do this, the Vega validators sign a MultisigControl order to construct a signature bundle. Any interested party can then take that signature bundle and pay the gas to run the command on Ethereum
abstract contract IMultisigControl {
    /***************************EVENTS****************************/
    event SignerAdded(address new_signer, uint256 nonce);
    event SignerRemoved(address old_signer, uint256 nonce);
    event ThresholdSet(uint16 new_threshold, uint256 nonce);
    event NonceBurnt(uint256 nonce);

    /**************************FUNCTIONS*********************/
    /// @notice Sets threshold of signatures that must be met before function is executed.
    /// @param new_threshold New threshold value
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @notice Ethereum has no decimals, threshold is % * 10 so 50% == 500 100% == 1000
    /// @notice signatures are OK if they are >= threshold count of total valid signers
    /// @dev MUST emit ThresholdSet event
    function set_threshold(
        uint16 new_threshold,
        uint256 nonce,
        bytes calldata signatures
    ) external virtual;

    /// @notice Adds new valid signer and adjusts signer count.
    /// @param new_signer New signer address
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev MUST emit 'SignerAdded' event
    function add_signer(
        address new_signer,
        uint256 nonce,
        bytes calldata signatures
    ) external virtual;

    /// @notice Removes currently valid signer and adjusts signer count.
    /// @param old_signer Address of signer to be removed.
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev MUST emit 'SignerRemoved' event
    function remove_signer(
        address old_signer,
        uint256 nonce,
        bytes calldata signatures
    ) external virtual;

    /// @notice Burn an nonce before it gets used by a user. Useful in case the validators needs to prevents a malicious user to do un-permitted action.
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits 'NonceBurnt' event
    function burn_nonce(uint256 nonce, bytes calldata signatures) external virtual;

    /// @notice Verifies a signature bundle and returns true only if the threshold of valid signers is met,
    /// @notice this is a function that any function controlled by Vega MUST call to be securely controlled by the Vega network
    /// @notice message to hash to sign follows this pattern:
    /// @notice abi.encode( abi.encode(param1, param2, param3, ... , nonce, function_name_string), validating_contract_or_submitter_address);
    /// @notice Note that validating_contract_or_submitter_address is the the submitting party. If on MultisigControl contract itself, it's the submitting ETH address
    /// @notice if function on bridge that then calls Multisig, then it's the address of that contract
    /// @notice Note also the embedded encoding, this is required to verify what function/contract the function call goes to
    /// @return MUST return true if valid signatures are over the threshold
    function verify_signatures(
        bytes calldata signatures,
        bytes memory message,
        uint256 nonce
    ) public virtual returns (bool);

    /**********************VIEWS*********************/
    /// @return Number of valid signers
    function get_valid_signer_count() external view virtual returns (uint8);

    /// @return Current threshold
    function get_current_threshold() external view virtual returns (uint16);

    /// @param signer_address target potential signer address
    /// @return true if address provided is valid signer
    function is_valid_signer(address signer_address) external view virtual returns (bool);

    /// @param nonce Nonce to lookup
    /// @return true if nonce has been used
    function is_nonce_used(uint256 nonce) external view virtual returns (bool);
}

/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/

//SPDX-License-Identifier: MIT
pragma solidity 0.8.8;

import "./IMultisigControl.sol";

/// @title MultisigControl
/// @author Vega Protocol
/// @notice This contract enables validators, through a multisignature process, to run functions on contracts by consensus
contract MultisigControl is IMultisigControl {
    constructor() {
        // set initial threshold to 50%
        threshold = 500;
        signers[msg.sender] = true;
        signer_count++;
        emit SignerAdded(msg.sender, 0);
    }

    uint16 threshold;
    uint8 signer_count;
    mapping(address => bool) public signers;
    mapping(uint256 => bool) used_nonces;

    /**************************FUNCTIONS*********************/
    /// @notice Sets threshold of signatures that must be met before function is executed.
    /// @param new_threshold New threshold value
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @notice Ethereum has no decimals, threshold is % * 10 so 50% == 500 100% == 1000
    /// @notice signatures are OK if they are >= threshold count of total valid signers
    /// @dev Emits ThresholdSet event
    function set_threshold(
        uint16 new_threshold,
        uint256 nonce,
        bytes calldata signatures
    ) external override {
        require(new_threshold < 1000 && new_threshold > 0, "new threshold outside range");
        bytes memory message = abi.encode(new_threshold, nonce, "set_threshold");
        require(verify_signatures(signatures, message, nonce), "bad signatures");
        threshold = new_threshold;
        emit ThresholdSet(new_threshold, nonce);
    }

    /// @notice Adds new valid signer and adjusts signer count.
    /// @param new_signer New signer address
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits 'SignerAdded' event
    function add_signer(
        address new_signer,
        uint256 nonce,
        bytes calldata signatures
    ) external override {
        bytes memory message = abi.encode(new_signer, nonce, "add_signer");
        require(!signers[new_signer], "signer already exists");
        require(verify_signatures(signatures, message, nonce), "bad signatures");
        signers[new_signer] = true;
        signer_count++;
        emit SignerAdded(new_signer, nonce);
    }

    /// @notice Removes currently valid signer and adjusts signer count.
    /// @param old_signer Address of signer to be removed.
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits 'SignerRemoved' event
    function remove_signer(
        address old_signer,
        uint256 nonce,
        bytes calldata signatures
    ) external override {
        bytes memory message = abi.encode(old_signer, nonce, "remove_signer");
        require(signers[old_signer], "signer doesn't exist");
        require(verify_signatures(signatures, message, nonce), "bad signatures");
        signers[old_signer] = false;
        signer_count--;
        emit SignerRemoved(old_signer, nonce);
    }

    /// @notice Burn an nonce before it gets used by a user. Useful in case the validators needs to prevents a malicious user to do un-permitted action.
    /// @param nonce Vega-assigned single-use number that provides replay attack protection
    /// @param signatures Vega-supplied signature bundle of a validator-signed order
    /// @notice See MultisigControl for more about signatures
    /// @dev Emits 'NonceBurnt' event
    function burn_nonce(uint256 nonce, bytes calldata signatures) external override {
        bytes memory message = abi.encode(nonce, "burn_nonce");
        require(verify_signatures(signatures, message, nonce), "bad signatures");
        emit NonceBurnt(nonce);
    }

    /// @notice Verifies a signature bundle and returns true only if the threshold of valid signers is met,
    /// @notice this is a function that any function controlled by Vega MUST call to be securely controlled by the Vega network
    /// @notice message to hash to sign follows this pattern:
    /// @notice abi.encode( abi.encode(param1, param2, param3, ... , nonce, function_name_string), validating_contract_or_submitter_address);
    /// @notice Note that validating_contract_or_submitter_address is the submitting party. If on MultisigControl contract itself, it's the submitting ETH address
    /// @notice if function on bridge that then calls Multisig, then it's the address of that contract
    /// @notice Note also the embedded encoding, this is required to verify what function/contract the function call goes to
    /// @return Returns true if valid signatures are over the threshold
    function verify_signatures(
        bytes calldata signatures,
        bytes memory message,
        uint256 nonce
    ) public override returns (bool) {
        require(signatures.length % 65 == 0, "bad sig length");
        require(signatures.length > 0, "must contain at least 1 sig");
        require(!used_nonces[nonce], "nonce already used");

        uint8 size = 0;
        address[] memory signers_temp = new address[](signer_count);

        bytes32 message_hash = keccak256(abi.encode(message, msg.sender));
        uint256 offset;
        assembly {
            offset := signatures.offset
        }
        for (uint256 msg_idx = 0; msg_idx < signatures.length; msg_idx += 65) {
            //recover address from that msg
            bytes32 r;
            bytes32 s;
            uint8 v;
            assembly {
                // first 32 bytes, after the length prefix
                r := calldataload(add(offset, msg_idx))
                // second 32 bytes
                s := calldataload(add(add(offset, msg_idx), 32))
                // final byte (first byte of the next 32 bytes)
                v := byte(0, calldataload(add(add(offset, msg_idx), 64)))
            }
            // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
            // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
            // the valid range for s in (281): 0 < s < secp256k1n ÷ 2 + 1, and for v in (282): v ∈ {27, 28}. Most
            // signatures from current libraries generate a unique signature with an s-value in the lower half order.
            //
            // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
            // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
            // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
            // these malleable signatures as well.
            require(
                uint256(s) <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0,
                "Malleable signature error"
            );
            if (v < 27) v += 27;

            address recovered_address = ecrecover(message_hash, v, r, s);

            if (signers[recovered_address] && !has_signed(signers_temp, recovered_address, size)) {
                signers_temp[size] = recovered_address;
                size++;
            }
        }

        used_nonces[nonce] = ((uint256(size) * 1000) / (uint256(signer_count))) > threshold;
        return used_nonces[nonce];
    }

    function has_signed(
        address[] memory signers_temp,
        address signer,
        uint8 size
    ) private pure returns (bool) {
        for (uint256 i; i < size; i++) {
            if (signers_temp[i] == signer) {
                return true;
            }
        }
        return false;
    }

    /// @return Number of valid signers
    function get_valid_signer_count() external view override returns (uint8) {
        return signer_count;
    }

    /// @return Current threshold
    function get_current_threshold() external view override returns (uint16) {
        return threshold;
    }

    /// @param signer_address target potential signer address
    /// @return true if address provided is valid signer
    function is_valid_signer(address signer_address) external view override returns (bool) {
        return signers[signer_address];
    }

    /// @param nonce Nonce to lookup
    /// @return true if nonce has been used
    function is_nonce_used(uint256 nonce) external view override returns (bool) {
        return used_nonces[nonce];
    }
}

/**
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMWEMMMMMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMLOVEMMMMMMMMMMMMMMMMMMMMMM...............MMMMMMMMMMMMM
MMMMMMMMMMHIXELMMMMMMMMMMMM....................MMMMMNNMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMM....................MMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMM88=........................+MMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMM....................MMMMM...MMMMMMMMMMMMMMM
MMMMMMMMMMMM.........................MM+..MMM....+MMMMMMMMMM
MMMMMMMMMNMM...................... ..MM?..MMM.. .+MMMMMMMMMM
MMMMNDDMM+........................+MM........MM..+MMMMMMMMMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................MMM
MMMMZ.............................+MM....................DDD
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MMMMZ.............................+MM..ZMMMMMMMMMMMMMMMMMMMM
MM..............................MMZ....ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM............................MM.......ZMMMMMMMMMMMMMMMMMMMM
MM......................ZMMMMM.......MMMMMMMMMMMMMMMMMMMMMMM
MM............... ......ZMMMMM.... ..MMMMMMMMMMMMMMMMMMMMMMM
MM...............MMMMM88~.........+MM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......$DDDDDDD.......$DDDDD..DDNMM..ZMMMMMMMMMMMMMMMMMMMM
MM.......ZMMMMMMM.......ZMMMMM..MMMMM..ZMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMM+.......MMMMM88NMMMMM..MMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM*/

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000f0f0fcda832415b935802c6dad0a6da2c7eaed8f

-----Decoded View---------------
Arg [0] : erc20_asset_pool (address): 0xF0f0FcDA832415b935802c6dAD0a6dA2c7EAed8f

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000f0f0fcda832415b935802c6dad0a6da2c7eaed8f

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