I used get request many times but didn't care about the sequence in which these parameters are being sent. There is a case of WooCoomerce REST API. i failed many times to get exact signature because i was not sending all GET parameters in sequence. Can anybody explains does parameter order matters in the request?
No, the parameter sequence doesn't matter. It is just the transfer of data from client to server. The data you pass is passed as a bunch, then you start processing it in your code. Hence, all the data comes together.
No, parameter order should not matter at all in any HTTP request. They are all parsed before they get to your script.