binance: add binance spot rebate history support

pkg/exchange/binance/reward.go

@@ -0,0 +1,45 @@
+package binance
+
+import (
+	"context"
+	"strconv"
+	"time"
+
+	"github.com/c9s/bbgo/pkg/exchange/binance/binanceapi"
+	"github.com/c9s/bbgo/pkg/types"
+)
+
+func (e *Exchange) QueryRewards(ctx context.Context, startTime time.Time) ([]types.Reward, error) {
+	req := e.client2.NewGetSpotRebateHistoryRequest()
+	req.StartTime(startTime)
+	history, err := req.Do(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	var rewards []types.Reward
+
+	for _, entry := range history {
+		t := types.RewardCommission
+		switch entry.Type {
+		case binanceapi.RebateTypeReferralKickback:
+			t = types.RewardReferralKickback
+		case binanceapi.RebateTypeCommission:
+			// use the default type
+		}
+		
+		rewards = append(rewards, types.Reward{
+			UUID:      strconv.FormatInt(entry.UpdateTime.Time().UnixMilli(), 10),
+			Exchange:  types.ExchangeBinance,
+			Type:      t,
+			Currency:  entry.Asset,
+			Quantity:  entry.Amount,
+			State:     "done",
+			Note:      "",
+			Spent:     false,
+			CreatedAt: types.Time(entry.UpdateTime),
+		})
+	}
+
+	return rewards, nil
+}

pkg/types/reward.go

@@ -12,6 +12,7 @@ type RewardType string
 const (
 	RewardAirdrop    = RewardType("airdrop")
 	RewardCommission = RewardType("commission")
+	RewardReferralKickback = RewardType("referral_kickback")
 	RewardHolding    = RewardType("holding")
 	RewardMining     = RewardType("mining")
 	RewardTrading    = RewardType("trading")