After getting all the orders from the v4 REST API and going through them, supposing that I have found an order I would like to fill, what do I need to do from this point to successfully call fillLimitOrder on the exchange proxy? Am I missing something really obvious here? Could somebody please walk me through the next steps? I'm still a bit of a novice when it comes to Solidity and a lot of relevant docs and samples seem to be offline right now, so the more detail you can provide, the better... Thanks!
You can use this example to fill the order that you want when fetched from ZRX API: https://github.com/0xProject/0x-starter-project/blob/master/src/scenarios/fill_erc20_limit_order.ts