futures: Implement GetLatestFundingRates across exchanges (#1339)

* adds funding rate implementations and improvements

* merge fixes x1

* lint

* kucoin funding rates func make

* migrate sync-manager to keys

* some kucoin work

* adds some kucoin wrapper funcs

* ehhh, todo

* kucoin position

* start of orders

* adds the kucoin tests yay

* multiplier

* nits, EWS includes order limits

* NotYetImplemented, IsPerp improvements, cleaning

* lint, test fix, huobi time

* fixes issues, improves testing

* fixes linters I WRECKED

* local lint but remote lint, lint, lint, lint

* fixes err

* skip CI

* lint

* Supported rates, binance endpoints

* fixes weird mocktest problems

* no, CZ is invalid

* fixes some new EWS test errors

exchanges/bitfinex/bitfinex_wrapper.go

@@ -18,6 +18,7 @@ import (
 	"github.com/thrasher-corp/gocryptotrader/exchanges/account"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/asset"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/deposit"
+	"github.com/thrasher-corp/gocryptotrader/exchanges/fundingrate"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/futures"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/kline"
 	"github.com/thrasher-corp/gocryptotrader/exchanges/order"
@@ -125,6 +126,7 @@ func (b *Bitfinex) SetDefaults() {
 				MultiChainDeposits:                true,
 				MultiChainWithdrawals:             true,
 				MultiChainDepositRequiresChainSet: true,
+				FundingRateFetching:               true,
 			},
 			WebsocketCapabilities: protocol.Features{
 				AccountBalance:         true,
@@ -150,6 +152,15 @@ func (b *Bitfinex) SetDefaults() {
 				DateRanges: true,
 				Intervals:  true,
 			},
+			FuturesCapabilities: exchange.FuturesCapabilities{
+				FundingRates: true,
+				SupportedFundingRateFrequencies: map[kline.Interval]bool{
+					kline.EightHour: true,
+				},
+				FundingRateBatching: map[asset.Item]bool{
+					asset.Margin: true,
+				},
+			},
 		},
 		Enabled: exchange.FeaturesEnabled{
 			AutoPairUpdates: true,
@@ -362,12 +373,9 @@ func (b *Bitfinex) UpdateTickers(ctx context.Context, a asset.Item) error {
 
 	for key, val := range tickerNew {
 		pair, enabled, err := b.MatchSymbolCheckEnabled(key[1:], a, true)
-		if err != nil {
-			if !errors.Is(err, currency.ErrPairNotFound) {
-				return err
-			}
+		if err != nil && !errors.Is(err, currency.ErrPairNotFound) {
+			return err
 		}
-
 		if !enabled {
 			continue
 		}
@@ -1297,3 +1305,9 @@ func (b *Bitfinex) GetServerTime(_ context.Context, _ asset.Item) (time.Time, er
 func (b *Bitfinex) GetFuturesContractDetails(context.Context, asset.Item) ([]futures.Contract, error) {
 	return nil, common.ErrFunctionNotSupported
 }
+
+// GetLatestFundingRates returns the latest funding rates data
+func (b *Bitfinex) GetLatestFundingRates(context.Context, *fundingrate.LatestRateRequest) ([]fundingrate.LatestRateResponse, error) {
+	// TODO: Add futures support for Bitfinex
+	return nil, common.ErrNotYetImplemented
+}