request/nonce: Refactor to simplify package and prevent consecutive mutex lock calls when accessing/setting nonce values (#1506)

* improv. timed mutex

* Add all protection back in and jankyness because races. :'(

* Add intial benchmarkeroos

* Add master benchmarks

* goodness me

* what?

* what again?

* glorious: nits

* just a swaperino instead

* clean up package nonce so that we only need to aquire mutex once

* unlock before checking master

* commentary

* wha

* more comment

* ch comment

* nonce: Allow for broad customisation externally with a ~2ns overhead

* glorious: nits maybe works?

---------

Co-authored-by: Ryan O'Hara-Reid <ryan.oharareid@thrasher.io>

exchanges/gemini/gemini.go

@@ -15,6 +15,7 @@ import (
 	"github.com/thrasher-corp/gocryptotrader/common/crypto"
 	"github.com/thrasher-corp/gocryptotrader/currency"
 	exchange "github.com/thrasher-corp/gocryptotrader/exchanges"
+	"github.com/thrasher-corp/gocryptotrader/exchanges/nonce"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/request"
 )
 
@@ -421,7 +422,7 @@ func (g *Gemini) SendAuthenticatedHTTPRequest(ctx context.Context, ep exchange.U
 	return g.SendPayload(ctx, request.Auth, func() (*request.Item, error) {
 		req := make(map[string]interface{})
 		req["request"] = fmt.Sprintf("/v%s/%s", geminiAPIVersion, path)
-		req["nonce"] = g.Requester.GetNonce(true).String()
+		req["nonce"] = g.Requester.GetNonce(nonce.UnixNano).String()
 
 		for key, value := range params {
 			req[key] = value