package bbgo import ( "context" "fmt" "path" "reflect" "strconv" "strings" "github.com/c9s/bbgo/pkg/fixedpoint" "github.com/c9s/bbgo/pkg/interact" "github.com/c9s/bbgo/pkg/types" ) type PositionCloser interface { ClosePosition(ctx context.Context, percentage fixedpoint.Value) error } type PositionReader interface { CurrentPosition() *types.Position } type closePositionContext struct { signature string closer PositionCloser percentage fixedpoint.Value } type modifyPositionContext struct { signature string modifier *types.Position target string value fixedpoint.Value } type CoreInteraction struct { environment *Environment trader *Trader exchangeStrategies map[string]SingleExchangeStrategy closePositionContext closePositionContext modifyPositionContext modifyPositionContext } func NewCoreInteraction(environment *Environment, trader *Trader) *CoreInteraction { return &CoreInteraction{ environment: environment, trader: trader, exchangeStrategies: make(map[string]SingleExchangeStrategy), } } type SimpleInteraction struct { Command string Description string F interface{} Cmd *interact.Command } func (it *SimpleInteraction) Commands(i *interact.Interact) { it.Cmd = i.PrivateCommand(it.Command, it.Description, it.F) } func RegisterCommand(command, desc string, f interface{}) *interact.Command { it := &SimpleInteraction{ Command: command, Description: desc, F: f, } interact.AddCustomInteraction(it) return it.Cmd } func getStrategySignatures(exchangeStrategies map[string]SingleExchangeStrategy) []string { var strategies []string for signature := range exchangeStrategies { strategies = append(strategies, signature) } return strategies } func filterStrategyByInterface(checkInterface interface{}, exchangeStrategies map[string]SingleExchangeStrategy) (strategies map[string]SingleExchangeStrategy, found bool) { found = false strategies = make(map[string]SingleExchangeStrategy) rt := reflect.TypeOf(checkInterface).Elem() for signature, strategy := range exchangeStrategies { if ok := reflect.TypeOf(strategy).Implements(rt); ok { strategies[signature] = strategy found = true } } return strategies, found } func filterStrategyByField(fieldName string, fieldType reflect.Type, exchangeStrategies map[string]SingleExchangeStrategy) (strategies map[string]SingleExchangeStrategy, found bool) { found = false strategies = make(map[string]SingleExchangeStrategy) for signature, strategy := range exchangeStrategies { r := reflect.ValueOf(strategy).Elem() f := r.FieldByName(fieldName) if !f.IsZero() && f.Type() == fieldType { strategies[signature] = strategy found = true } } return strategies, found } func generateStrategyButtonsForm(strategies map[string]SingleExchangeStrategy) [][3]string { var buttonsForm [][3]string signatures := getStrategySignatures(strategies) for _, signature := range signatures { buttonsForm = append(buttonsForm, [3]string{signature, "strategy", signature}) } return buttonsForm } func (it *CoreInteraction) Commands(i *interact.Interact) { i.PrivateCommand("/sessions", "List Exchange Sessions", func(reply interact.Reply) error { switch r := reply.(type) { case *interact.SlackReply: // call slack specific api to build the reply object _ = r } message := "Your connected sessions:\n" for name, session := range it.environment.Sessions() { message += "- " + name + " (" + session.ExchangeName.String() + ")\n" } reply.Message(message) return nil }) i.PrivateCommand("/balances", "Show balances", func(reply interact.Reply) error { reply.Message("Please select an exchange session") for name := range it.environment.Sessions() { reply.AddButton(name, "session", name) } return nil }).Next(func(sessionName string, reply interact.Reply) error { session, ok := it.environment.Session(sessionName) if !ok { reply.Message(fmt.Sprintf("Session %s not found", sessionName)) return fmt.Errorf("session %s not found", sessionName) } message := "Your balances\n" balances := session.GetAccount().Balances() for _, balance := range balances { if balance.Total().IsZero() { continue } message += "- " + balance.String() + "\n" } reply.Message(message) return nil }) i.PrivateCommand("/position", "Show Position", func(reply interact.Reply) error { // it.trader.exchangeStrategies // send symbol options if strategies, found := filterStrategyByInterface((*PositionReader)(nil), it.exchangeStrategies); found { reply.AddMultipleButtons(generateStrategyButtonsForm(strategies)) reply.Message("Please choose one strategy") } else { reply.Message("No strategy supports PositionReader") } return nil }).Cycle(func(signature string, reply interact.Reply) error { strategy, ok := it.exchangeStrategies[signature] if !ok { reply.Message("Strategy not found") return fmt.Errorf("strategy %s not found", signature) } reader, implemented := strategy.(PositionReader) if !implemented { reply.Message(fmt.Sprintf("Strategy %s does not support position close", signature)) return fmt.Errorf("strategy %s does not implement PositionCloser interface", signature) } position := reader.CurrentPosition() if position != nil { reply.Send("Your current position:") reply.Send(position.PlainText()) if position.Base.IsZero() { reply.Message(fmt.Sprintf("Strategy %q has no opened position", signature)) return fmt.Errorf("strategy %T has no opened position", strategy) } } if kc, ok := reply.(interact.KeyboardController); ok { kc.RemoveKeyboard() } return nil }) i.PrivateCommand("/closeposition", "Close position", func(reply interact.Reply) error { // it.trader.exchangeStrategies // send symbol options if strategies, found := filterStrategyByInterface((*PositionCloser)(nil), it.exchangeStrategies); found { reply.AddMultipleButtons(generateStrategyButtonsForm(strategies)) reply.Message("Please choose one strategy") } else { reply.Message("No strategy supports PositionCloser") } return nil }).Next(func(signature string, reply interact.Reply) error { strategy, ok := it.exchangeStrategies[signature] if !ok { reply.Message("Strategy not found") return fmt.Errorf("strategy %s not found", signature) } closer, implemented := strategy.(PositionCloser) if !implemented { reply.Message(fmt.Sprintf("Strategy %s does not support position close", signature)) return fmt.Errorf("strategy %s does not implement PositionCloser interface", signature) } it.closePositionContext.closer = closer it.closePositionContext.signature = signature if reader, implemented := strategy.(PositionReader); implemented { position := reader.CurrentPosition() if position != nil { reply.Send("Your current position:") reply.Send(position.PlainText()) if position.Base.IsZero() { reply.Message("No opened position") if kc, ok := reply.(interact.KeyboardController); ok { kc.RemoveKeyboard() } return fmt.Errorf("no opened position") } } } reply.Message("Choose or enter the percentage to close") for _, p := range []string{"5%", "25%", "50%", "80%", "100%"} { reply.AddButton(p, "percentage", p) } return nil }).Next(func(percentageStr string, reply interact.Reply) error { percentage, err := fixedpoint.NewFromString(percentageStr) if err != nil { reply.Message(fmt.Sprintf("%q is not a valid percentage string", percentageStr)) return err } if kc, ok := reply.(interact.KeyboardController); ok { kc.RemoveKeyboard() } err = it.closePositionContext.closer.ClosePosition(context.Background(), percentage) if err != nil { reply.Message(fmt.Sprintf("Failed to close the position, %s", err.Error())) return err } reply.Message("Done") return nil }) i.PrivateCommand("/status", "Strategy Status", func(reply interact.Reply) error { // it.trader.exchangeStrategies // send symbol options if strategies, found := filterStrategyByInterface((*StrategyStatusReader)(nil), it.exchangeStrategies); found { reply.AddMultipleButtons(generateStrategyButtonsForm(strategies)) reply.Message("Please choose a strategy") } else { reply.Message("No strategy supports StrategyStatusReader") } return nil }).Next(func(signature string, reply interact.Reply) error { strategy, ok := it.exchangeStrategies[signature] if !ok { reply.Message("Strategy not found") return fmt.Errorf("strategy %s not found", signature) } controller, implemented := strategy.(StrategyStatusReader) if !implemented { reply.Message(fmt.Sprintf("Strategy %s does not support StrategyStatusReader", signature)) return fmt.Errorf("strategy %s does not implement StrategyStatusReader", signature) } status := controller.GetStatus() if kc, ok := reply.(interact.KeyboardController); ok { kc.RemoveKeyboard() } if status == types.StrategyStatusRunning { reply.Message(fmt.Sprintf("Strategy %s is running.", signature)) } else if status == types.StrategyStatusStopped { reply.Message(fmt.Sprintf("Strategy %s is not running.", signature)) } return nil }) i.PrivateCommand("/suspend", "Suspend Strategy", func(reply interact.Reply) error { // it.trader.exchangeStrategies // send symbol options if strategies, found := filterStrategyByInterface((*StrategyToggler)(nil), it.exchangeStrategies); found { reply.AddMultipleButtons(generateStrategyButtonsForm(strategies)) reply.Message("Please choose one strategy") } else { reply.Message("No strategy supports StrategyToggler") } return nil }).Next(func(signature string, reply interact.Reply) error { strategy, ok := it.exchangeStrategies[signature] if !ok { reply.Message("Strategy not found") return fmt.Errorf("strategy %s not found", signature) } controller, implemented := strategy.(StrategyToggler) if !implemented { reply.Message(fmt.Sprintf("Strategy %s does not support StrategyToggler", signature)) return fmt.Errorf("strategy %s does not implement StrategyToggler", signature) } // Check strategy status before suspend if controller.GetStatus() != types.StrategyStatusRunning { reply.Message(fmt.Sprintf("Strategy %s is not running.", signature)) return nil } if kc, ok := reply.(interact.KeyboardController); ok { kc.RemoveKeyboard() } if err := controller.Suspend(); err != nil { reply.Message(fmt.Sprintf("Failed to suspend the strategy, %s", err.Error())) return err } reply.Message(fmt.Sprintf("Strategy %s suspended.", signature)) return nil }) i.PrivateCommand("/resume", "Resume Strategy", func(reply interact.Reply) error { // it.trader.exchangeStrategies // send symbol options if strategies, found := filterStrategyByInterface((*StrategyToggler)(nil), it.exchangeStrategies); found { reply.AddMultipleButtons(generateStrategyButtonsForm(strategies)) reply.Message("Please choose one strategy") } else { reply.Message("No strategy supports StrategyToggler") } return nil }).Next(func(signature string, reply interact.Reply) error { strategy, ok := it.exchangeStrategies[signature] if !ok { reply.Message("Strategy not found") return fmt.Errorf("strategy %s not found", signature) } controller, implemented := strategy.(StrategyToggler) if !implemented { reply.Message(fmt.Sprintf("Strategy %s does not support StrategyToggler", signature)) return fmt.Errorf("strategy %s does not implement StrategyToggler", signature) } // Check strategy status before suspend if controller.GetStatus() != types.StrategyStatusStopped { reply.Message(fmt.Sprintf("Strategy %s is running.", signature)) return nil } if kc, ok := reply.(interact.KeyboardController); ok { kc.RemoveKeyboard() } if err := controller.Resume(); err != nil { reply.Message(fmt.Sprintf("Failed to resume the strategy, %s", err.Error())) return err } reply.Message(fmt.Sprintf("Strategy %s resumed.", signature)) return nil }) i.PrivateCommand("/emergencystop", "Emergency Stop", func(reply interact.Reply) error { // it.trader.exchangeStrategies // send symbol options if strategies, found := filterStrategyByInterface((*EmergencyStopper)(nil), it.exchangeStrategies); found { reply.AddMultipleButtons(generateStrategyButtonsForm(strategies)) reply.Message("Please choose one strategy") } else { reply.Message("No strategy supports EmergencyStopper") } return nil }).Next(func(signature string, reply interact.Reply) error { strategy, ok := it.exchangeStrategies[signature] if !ok { reply.Message("Strategy not found") return fmt.Errorf("strategy %s not found", signature) } controller, implemented := strategy.(EmergencyStopper) if !implemented { reply.Message(fmt.Sprintf("Strategy %s does not support EmergencyStopper", signature)) return fmt.Errorf("strategy %s does not implement EmergencyStopper", signature) } if kc, ok := reply.(interact.KeyboardController); ok { kc.RemoveKeyboard() } if err := controller.EmergencyStop(); err != nil { reply.Message(fmt.Sprintf("Failed to emergency stop the strategy, %s", err.Error())) return err } reply.Message(fmt.Sprintf("Strategy %s stopped and the position closed.", signature)) return nil }) // Position updater i.PrivateCommand("/modifyposition", "Modify Strategy Position", func(reply interact.Reply) error { // it.trader.exchangeStrategies // send symbol options if strategies, found := filterStrategyByField("Position", reflect.TypeOf(types.NewPosition("", "", "")), it.exchangeStrategies); found { reply.AddMultipleButtons(generateStrategyButtonsForm(strategies)) reply.Message("Please choose one strategy") } else { reply.Message("No strategy supports Position Modify") } return nil }).Next(func(signature string, reply interact.Reply) error { strategy, ok := it.exchangeStrategies[signature] if !ok { reply.Message("Strategy not found") return fmt.Errorf("strategy %s not found", signature) } r := reflect.ValueOf(strategy).Elem() f := r.FieldByName("Position") positionModifier, implemented := f.Interface().(*types.Position) if !implemented { reply.Message(fmt.Sprintf("Strategy %s does not support Position Modify", signature)) return fmt.Errorf("strategy %s does not implement Position Modify", signature) } it.modifyPositionContext.modifier = positionModifier it.modifyPositionContext.signature = signature reply.Message("Please choose what you want to change") reply.AddButton("base", "Base", "base") reply.AddButton("quote", "Quote", "quote") reply.AddButton("cost", "Average Cost", "cost") return nil }).Next(func(target string, reply interact.Reply) error { if target != "base" && target != "quote" && target != "cost" { reply.Message(fmt.Sprintf("%q is not a valid target string", target)) return fmt.Errorf("%q is not a valid target string", target) } it.modifyPositionContext.target = target reply.Message("Enter the amount to change") return nil }).Next(func(valueStr string, reply interact.Reply) error { value, err := fixedpoint.NewFromString(valueStr) if err != nil { reply.Message(fmt.Sprintf("%q is not a valid value string", valueStr)) return err } if kc, ok := reply.(interact.KeyboardController); ok { kc.RemoveKeyboard() } if it.modifyPositionContext.target == "base" { err = it.modifyPositionContext.modifier.ModifyBase(value) } else if it.modifyPositionContext.target == "quote" { err = it.modifyPositionContext.modifier.ModifyQuote(value) } else if it.modifyPositionContext.target == "cost" { err = it.modifyPositionContext.modifier.ModifyAverageCost(value) } if err != nil { reply.Message(fmt.Sprintf("Failed to modify position of the strategy, %s", err.Error())) return err } reply.Message(fmt.Sprintf("Position of strategy %s modified.", it.modifyPositionContext.signature)) return nil }) } func (it *CoreInteraction) Initialize() error { // re-map exchange strategies into the signature-object map for sessionID, strategies := range it.trader.exchangeStrategies { for _, strategy := range strategies { signature, err := getStrategySignature(strategy) if err != nil { return err } key := sessionID + "." + signature it.exchangeStrategies[key] = strategy } } return nil } // getStrategySignature returns strategy instance unique signature func getStrategySignature(strategy SingleExchangeStrategy) (string, error) { // Returns instance ID var signature = callID(strategy) if signature != "" { return signature, nil } // Use reflect to build instance signature rv := reflect.ValueOf(strategy).Elem() if rv.Kind() != reflect.Struct { return "", fmt.Errorf("strategy %T instance is not a struct", strategy) } signature = path.Base(rv.Type().PkgPath()) for i := 0; i < rv.NumField(); i++ { field := rv.Field(i) fieldName := rv.Type().Field(i).Name if field.Kind() == reflect.String && fieldName != "Status" { str := field.String() if len(str) > 0 { signature += "." + field.String() } } } return signature, nil } func parseFloatPercent(s string, bitSize int) (f float64, err error) { i := strings.Index(s, "%") if i < 0 { return strconv.ParseFloat(s, bitSize) } f, err = strconv.ParseFloat(s[:i], bitSize) if err != nil { return 0, err } return f / 100.0, nil }