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marketdatacollector.go
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/
marketdatacollector.go
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package main
import (
"context"
"encoding/csv"
"errors"
"github.com/adshao/go-binance/v2"
"github.com/vadiminshakov/marti/entity"
"os"
"time"
)
func dataColletorFactory(filePath string, pair *entity.Pair) (func(fromHoursAgo, toHoursAgo int, klinesize string) error, error) {
apikey := os.Getenv("APIKEY")
if len(apikey) == 0 {
return nil, errors.New("APIKEY env is not set")
}
secretkey := os.Getenv("SECRETKEY")
if len(apikey) == 0 {
return nil, errors.New("SECRETKEY env is not set")
}
client := binance.NewClient(apikey, secretkey)
return func(fromHoursAgo, toHoursAgo int, klinesize string) error {
data, err := collectMarketData(client, pair, fromHoursAgo, toHoursAgo, klinesize)
if err != nil {
return err
}
return writeMarketDataCsv(filePath, data)
}, nil
}
func collectMarketData(client *binance.Client, pair *entity.Pair, fromHoursAgo, toHoursAgo int, klinesize string) ([][]string, error) {
startTime := time.Now().Add(-time.Duration(fromHoursAgo)*time.Hour).Unix() * 1000
endTime := time.Now().Add(-time.Duration(toHoursAgo)*time.Hour).Unix() * 1000
klines, err := client.NewKlinesService().Symbol(pair.Symbol()).StartTime(startTime).
EndTime(endTime).
Interval(klinesize).Do(context.Background())
if err != nil {
return nil, err
}
data := make([][]string, 0, len(klines))
for _, kline := range klines {
data = append(data, []string{
kline.Open,
kline.High,
kline.Low,
kline.Close,
})
}
return data, nil
}
func writeMarketDataCsv(filePath string, data [][]string) error {
f, err := os.OpenFile(filePath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
defer f.Close()
w := csv.NewWriter(f)
return w.WriteAll(data)
}