bitget: add minimal bitget exchange

pkg/exchange/bitget/exchange.go

@@ -0,0 +1,45 @@
+package bitget
+
+import (
+	"github.com/sirupsen/logrus"
+
+	"github.com/c9s/bbgo/pkg/exchange/bitget/bitgetapi"
+	"github.com/c9s/bbgo/pkg/types"
+)
+
+const ID = "bitget"
+
+const PlatformToken = "BGB"
+
+var log = logrus.WithFields(logrus.Fields{
+	"exchange": ID,
+})
+
+type Exchange struct {
+	key, secret, passphrase string
+
+	client *bitgetapi.RestClient
+}
+
+func New(key, secret, passphrase string) *Exchange {
+	client := bitgetapi.NewClient()
+
+	if len(key) > 0 && len(secret) > 0 {
+		client.Auth(key, secret, passphrase)
+	}
+
+	return &Exchange{
+		key:        key,
+		secret:     secret,
+		passphrase: passphrase,
+		client:     client,
+	}
+}
+
+func (e *Exchange) Name() types.ExchangeName {
+	return types.ExchangeBitget
+}
+
+func (e *Exchange) PlatformFeeCurrency() string {
+	return PlatformToken
+}