refactor: refactor relay part

relay/util/billing.go

@@ -0,0 +1,19 @@
+package util
+
+import (
+	"context"
+	"one-api/common/logger"
+	"one-api/model"
+)
+
+func ReturnPreConsumedQuota(ctx context.Context, preConsumedQuota int, tokenId int) {
+	if preConsumedQuota != 0 {
+		go func(ctx context.Context) {
+			// return pre-consumed quota
+			err := model.PostConsumeTokenQuota(tokenId, -preConsumedQuota)
+			if err != nil {
+				logger.Error(ctx, "error return pre-consumed quota: "+err.Error())
+			}
+		}(ctx)
+	}
+}