ozMiddleware

Contract in charge of forwarding the call from ozPayMe to ozDiamond in L2. The main reason of its implementation is to change the msg.sender on each call, and produce a unique sender for all Accounts of the system, in order to have an unified caller to check in L2, and in this way, avoid unauthorized calls to the main entry function (exchangeToAccountToken()).

It contains the bridging and emergency mechanism, in case, for whatever reason, it's not possible to bridge the ETH to L2.

Github repo here.

System methods

forwardCall

function forwardCall(
        uint gasPriceBid_,
        bytes memory dataForL2_,
        uint amountToSend_,
        address account_
) external payable returns(bool, bool, address);

Forwards the call from ozPayMe to Arbitrum's Delayed Inbox, which finished with ozDiamond in L2.

Parameters:

Name	Type	Description
gasPriceBid_	uint256	L2's gas price
dataForL2_	bytes	Details of the Account (except for the name)
account_	address	The Account

Return values:

Type	Description
boolean	If _runEmergencyMode was called
boolean	If forwarding to Emitter is enabled
address	Owner of the Account

_runEmergencyMode

function _runEmergencyMode(address user_, uint16 slippage_) private nonReentrant;

It executes an emergency swap on Uniswap for the token specified as tokenOut in the EmergencyMode struct, and send this to the user.