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responses.go
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responses.go
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package indodax
import (
"encoding/json"
"fmt"
"strconv"
"strings"
"time"
)
// ResponseMeta response metadata
type ResponseMeta struct {
Success int `json:"success"`
ErrorMessage string `json:"error"`
ErrorCode string `json:"error_code"`
}
// Error return nil if success
func (r *ResponseMeta) Error() error {
if r.Success == 1 {
return nil
}
return fmt.Errorf(r.ErrorMessage)
}
// Info user info
type Info struct {
UserID string `json:"user_id"`
Name string `json:"name"`
Email string `json:"email"`
ServerTimeSeconds int64 `json:"server_time"`
BalanceAvailable Balance `json:"balance"`
BalanceHold Balance `json:"balance_hold"`
}
// ServerTime returns server time
func (i *Info) ServerTime() time.Time {
return time.Unix(0, i.ServerTimeSeconds*int64(time.Second))
}
// Balance contains crypto balance
type Balance map[string]interface{}
// Get balance amount by currency
func (b Balance) Get(currency string) float64 {
switch val := b[currency].(type) {
case float64:
return val
case string:
balance, err := strconv.ParseFloat(val, 64)
if err != nil {
panic(err)
}
return balance
default:
panic(fmt.Errorf("Cannot parse value of %q", val))
}
}
// NonEmpty returns new Balance with empty amounts filtered out
func (b Balance) NonEmpty() Balance {
result := Balance{}
for key := range b {
if balance := b.Get(key); balance > 0 {
result[key] = balance
}
}
return result
}
// GetInfoResponse response from getInfo method
type GetInfoResponse struct {
ResponseMeta `json:",inline"`
Info Info `json:"return"`
}
type TradeType string
var (
TradeTypeBuy TradeType = "buy"
TradeTypeSell TradeType = "sell"
)
type Trade map[string]string
func (t Trade) Fee() float64 {
val, err := strconv.ParseFloat(t["fee"], 64)
if err != nil {
panic(fmt.Errorf("Cannot get fee for Trade: %+v", t))
}
return val
}
func (t Trade) TargetCurrency() string {
return t["currency"]
}
func (t Trade) TargetAmount() float64 {
val, err := strconv.ParseFloat(t[t.TargetCurrency()], 64)
if err != nil {
panic(fmt.Errorf("Cannot get target amount for Trade: %+v", t))
}
return val
}
func (t Trade) BasePrice() float64 {
val, err := strconv.ParseFloat(t["price"], 64)
if err != nil {
panic(fmt.Errorf("Cannot get base price for Trade: %+v", t))
}
return val
}
func (t Trade) BaseCurrency() string {
frags := strings.Split(t.Pair(), "_")
return frags[len(frags)-1]
}
func (t Trade) Type() string {
return t["type"]
}
func (t Trade) Pair() string {
return t["pair"]
}
func (t Trade) TotalCost() float64 {
// TODO: calculate fee
return t.BasePrice() * t.TargetAmount()
}
func (t Trade) Time() time.Time {
val, err := strconv.ParseInt(t["trade_time"], 10, 64)
if err != nil {
panic(fmt.Errorf("Cannot get time for Trade: %+v", t))
}
return time.Unix(val, 0)
}
func (t Trade) Description() string {
return fmt.Sprintf("[%s] %f %s for %f %s with a total of %f %s on [%s]",
strings.ToUpper(t.Type()),
t.TargetAmount(), strings.ToUpper(t.TargetCurrency()),
t.BasePrice(), strings.ToUpper(t.BaseCurrency()),
t.TotalCost(), strings.ToUpper(t.BaseCurrency()),
t.Time(),
)
}
type TradeHistory struct {
Trades []Trade `json:"trades"`
}
type TradeHistoryResponse struct {
ResponseMeta `json:",inline"`
TradeHistory TradeHistory `json:"return"`
}
func (c *TypedClient) GetTradeHistory(pair string) (*TradeHistoryResponse, error) {
r, err := c.CallPrivate(MethodTradeHistory, map[string]string{
"pair": pair,
"order": "desc",
})
if err != nil {
return nil, err
}
var result TradeHistoryResponse
if err := json.NewDecoder(r.Body).Decode(&result); err != nil {
return nil, err
}
if err := result.Error(); err != nil {
return nil, err
}
return &result, nil
}