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interact.go
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interact.go
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package bbgo
import (
"context"
"fmt"
"path"
"reflect"
"strconv"
"strings"
"github.com/c9s/bbgo/pkg/dynamic"
"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 = dynamic.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
}