若干更新迭代

backend/internal/billing/http_service.go

@@ -112,6 +112,7 @@ type AccountConfigStore interface {
 // Billing HTTP module. Implementations can execute overview reads concurrently.
 type ReadService interface {
 	Overview(context.Context, string, string) (Overview, error)
+	Wallet(context.Context, string) (Wallet, error)
 	AdminOverview(context.Context) (AdminOverview, error)
 	ListPrices(context.Context) ([]PriceRule, error)
 	GetPrice(context.Context, string) (*PriceRule, error)