Feature: Implement funding rates, futures and coin margin (exchange API coverage) (#530)

* ALMOST THERE

* more api wips

* more api thingz

* testing n more api wipz

* more apiz

* more wips

* what is goin on

* more wips

* whip n testing

* testing

* testing

no keys

* remove log

* kraken is broken

ugh

* still broken

* fixing auth funcs + usdtm api docs

* wip

* api stuffs

* whip

* more wips

* whip

* more wip

* api wip n testing

* wip

* wip

* unsaved

* wip n testing

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* whip

* wrapper authenticated functions

* adding asset type and fixing dependencies

* wip

* binance auth wrapper start

* wrapper functionality

* wip

* wip

* wip

* wrapper cancel functions

* order submission for wrappers

* wip

* more error fixing and nits

* websocket beginning n error fix

* wip

* WOW

* glorious n shazzy nits

* useless nits

* wip

* fixing things

* merge stuffs

* crapveyor

* crapveyor rebuild

* probably broke more things than he fixed

* rm lns n other thangs

* hope

* please

* stop it

* done

* ofcourse

* rm vb

* fix lbank

* appveyor please

* float lev

* DONT ASK RYAN FOR HELP EVER

* wip

* wip

* endpoint upgrades continued

* path upgrade

* NeeeNeeeNeeeNeeeNING

* fix stuffs

* fixing time issue

* fixing broken funcs

* glorious nits

* shaz changes

* fixing errors for fundmon

* more error fixing for fundmon

* test running past 30s

* basic changes

* THX AGAIN SHAZBERT

* path system upgrade

* config upgrade

* unsaved stuffs

* broken wip config upgrade

* path system upgrade contd.

* path system upgrade contd

* path upgrade ready for review

* testing verbose removed

* linter stuffs

* appveyor stuffs

* appveyor stuff

* fixed?

* bugfix

* wip

* broken stuff

* fix test

* wierd hack fix

* appveyor pls stop

* error found

* more useless nits

* bitmex err

* broken wip

* broken wip path upgrade change to uint32

* changed url lookups to uint

* WOW

* ready4review

* config fixed HOPEFULLY

* config fix and glorious changes

* efficient way of getting orders and open orders

* binance wrapper logic fixing

* testing, adding tests and fixing lot of errrrrs

* merge master

* appveyor stuffs

* appveyor stuffs

* fmt

* test

* octalLiteral issue fix?

* octalLiteral fix?

* rm vb

* prnt ln to restart

* adding testz

* test fixzzz

* READY FOR REVIEW

* Actually ready now

* FORMATTING

* addressing shazzy n glorious nits

* crapveyor

* rm vb

* small change

* fixing err

* shazbert nits

* review changes

* requested changes

* more requested changes

* noo

* last nit fixes

* restart appveyor

* improving test cov

* Update .golangci.yml

* shazbert changes

* moving pair formatting

* format pair update wip

* path upgrade complete

* error fix

* appveyor linters

* more linters

* remove testexch

* more formatting changes

* changes

* shazbert changes

* checking older requested changes to ensure completion

* wip

* fixing broken code

* error fix

* all fixed

* additional changes

* more changes

* remove commented code

* ftx margin api

* appveyor fixes

* more appveyor issues + test addition

* more appveyor issues + test addition

* remove unnecessary

* testing

* testing, fixing okex api, error fix

* git merge fix

* go sum

* glorious changes and error fix

* rm vb

* more glorious changes and go mod tidy

* fixed now

* okex testing upgrade

* old config migration and batch fetching fix

* added test

* glorious requested changes WIP

* tested and fixed

* go fmted

* go fmt and test fix

* additional funcs and tests for fundingRates

* OKEX tested and fixed

* appveyor fixes

* ineff assign

* 1 glorious change

* error fix

* typo

* shazbert changes

* glorious code changes and path fixing huobi WIP

* adding assetType to accountinfo functions

* fixing panic

* panic fix and updating account info wrappers WIP

* updateaccountinfo updated

* testing WIP binance USDT n Coin Margined and Kraken Futures

* auth functions tested and fixed

* added test

* config reverted

* shazbert and glorious changes

* shazbert and glorious changes

* latest changes and portfolio update

* go fmt change:

* remove commented codes

* improved error checking

* index out of range fix

* rm ln

* critical nit

* glorious latest changes

* appveyor changes

* shazbert change

* easier readability

* latest glorious changes

* shadow dec

* assetstore updated

* last change

* another last change

* merge changes

* go mod tidy

* thrasher requested changes wip

* improving struct layouts

* appveyor go fmt

* remove unnecessary code

* shazbert changes

* small change

* oopsie

* tidy

* configtest reverted

* error fix

* oopsie

* for what

* test patch fix

* insecurities

* fixing tests

* fix config

exchanges/exchange_types.go

@@ -166,19 +166,20 @@ type FeaturesSupported struct {
 	Kline                 kline.ExchangeCapabilitiesSupported
 }
 
+// Endpoints stores running url endpoints for exchanges
+type Endpoints struct {
+	Exchange string
+	defaults map[string]string
+	sync.RWMutex
+}
+
 // API stores the exchange API settings
 type API struct {
 	AuthenticatedSupport          bool
 	AuthenticatedWebsocketSupport bool
 	PEMKeySupport                 bool
 
-	Endpoints struct {
-		URL                 string
-		URLDefault          string
-		URLSecondary        string
-		URLSecondaryDefault string
-		WebsocketURL        string
-	}
+	Endpoints *Endpoints
 
 	Credentials struct {
 		Key      string
@@ -222,3 +223,37 @@ type Base struct {
 	settingsMutex               sync.RWMutex
 	OrderbookVerificationBypass bool
 }
+
+// url lookup consts
+const (
+	RestSpot URL = iota
+	RestSpotSupplementary
+	RestUSDTMargined
+	RestCoinMargined
+	RestFutures
+	RestSwap
+	RestSandbox
+	WebsocketSpot
+	WebsocketSpotSupplementary
+	ChainAnalysis
+	EdgeCase1
+	EdgeCase2
+	EdgeCase3
+)
+
+var keyURLs = []URL{RestSpot,
+	RestSpotSupplementary,
+	RestUSDTMargined,
+	RestCoinMargined,
+	RestFutures,
+	RestSwap,
+	RestSandbox,
+	WebsocketSpot,
+	WebsocketSpotSupplementary,
+	ChainAnalysis,
+	EdgeCase1,
+	EdgeCase2,
+	EdgeCase3}
+
+// URL stores uint conversions
+type URL uint16