portal/renter/price_tracker.go

253 lines
6.2 KiB
Go

package renter
import (
"context"
"errors"
"math/big"
"time"
"git.lumeweb.com/LumeWeb/portal/db/models"
"github.com/siacentral/apisdkgo"
"git.lumeweb.com/LumeWeb/portal/config"
"git.lumeweb.com/LumeWeb/portal/cron"
"github.com/go-co-op/gocron/v2"
siasdk "github.com/siacentral/apisdkgo/sia"
"go.sia.tech/core/types"
"go.uber.org/fx"
"go.uber.org/zap"
"gorm.io/gorm"
)
var _ cron.CronableService = (*PriceTracker)(nil)
const usdSymbol = "usd"
type PriceTracker struct {
config *config.Manager
logger *zap.Logger
cron *cron.CronServiceDefault
db *gorm.DB
renter *RenterDefault
api *siasdk.APIClient
}
func (p PriceTracker) LoadInitialTasks(cron cron.CronService) error {
job := gocron.DurationJob(time.Minute)
_, err := cron.Scheduler().NewJob(
job,
gocron.NewTask(p.recordRate),
)
if err != nil {
return err
}
return err
}
func (p PriceTracker) recordRate() {
rate, _, err := p.api.GetExchangeRate()
if err != nil {
p.logger.Error("failed to get exchange rate", zap.Error(err))
return
}
siaPrice, ok := rate[usdSymbol]
if !ok {
p.logger.Error("exchange rate not found")
return
}
var history models.SCPriceHistory
history.Rate = siaPrice
if tx := p.db.Create(&history); tx.Error != nil {
p.logger.Error("failed to save price history", zap.Error(tx.Error))
}
if err := p.updatePrices(); err != nil {
p.logger.Error("failed to update prices", zap.Error(err))
}
}
func (p PriceTracker) updatePrices() error {
var averageRate float64
x := 1
sql := `
SELECT AVG(rate) as average_rate FROM (
SELECT rate FROM (
SELECT rate, ROW_NUMBER() OVER (PARTITION BY DATE(created_at) ORDER BY created_at DESC) as rn
FROM sc_price_histories
WHERE created_at >= NOW() - INTERVAL ? day
) tmp WHERE rn = 1
) final;
`
err := p.db.Raw(sql, x).Scan(&averageRate).Error
if err != nil {
p.logger.Error("failed to fetch average rate", zap.Error(err), zap.Int("days", x))
return err
}
if averageRate == 0 {
p.logger.Error("average rate is 0")
return errors.New("average rate is 0")
}
ctx := context.Background()
gouge, err := p.renter.GougingSettings(ctx)
if err != nil {
p.logger.Error("failed to fetch gouging settings", zap.Error(err))
return err
}
redundancy, err := p.renter.RedundancySettings(ctx)
if err != nil {
p.logger.Error("failed to fetch redundancy settings", zap.Error(err))
return err
}
maxDownloadPrice := p.config.Config().Core.Storage.Sia.MaxDownloadPrice / averageRate
maxDownloadPrice = maxDownloadPrice / redundancy.Redundancy()
maxDownloadPriceSc, err := siacoinsFromFloat(maxDownloadPrice)
if err != nil {
return err
}
gouge.MaxDownloadPrice = maxDownloadPriceSc
gouge.MaxUploadPrice, err = siacoinsFromFloat(p.config.Config().Core.Storage.Sia.MaxUploadPrice / averageRate)
if err != nil {
return err
}
gouge.MaxContractPrice, err = siacoinsFromFloat(p.config.Config().Core.Storage.Sia.MaxContractPrice / averageRate)
if err != nil {
return err
}
gouge.MaxStoragePrice, err = siacoinsFromFloat(p.config.Config().Core.Storage.Sia.MaxStoragePrice / averageRate)
if err != nil {
return err
}
gouge.MaxRPCPrice, err = siacoinsFromFloat(p.config.Config().Core.Storage.Sia.MaxRPCPrice / averageRate)
if err != nil {
return err
}
err = p.renter.UpdateGougingSettings(context.Background(), gouge)
if err != nil {
return err
}
return nil
}
func (p PriceTracker) importPrices() error {
var count int64
// Query to count the number of historical records
err := p.db.Model(&models.SCPriceHistory{}).Count(&count).Error
if err != nil {
p.logger.Error("failed to count historical records", zap.Error(err))
return err
}
daysOfHistory := p.config.Config().Core.Storage.Sia.PriceHistoryDays
// Check if the count is less than x
if uint64(count) < daysOfHistory {
// Calculate how many records need to be fetched and created
missingRecords := daysOfHistory - uint64(count)
for i := uint64(0); i < missingRecords; i++ {
currentDate := time.Now().UTC().AddDate(0, 0, int(-i))
timestamp := time.Date(currentDate.Year(), currentDate.Month(), currentDate.Day(), 0, 0, 0, 0, time.UTC)
// Fetch the historical exchange rate for the calculated timestamp
rates, err := p.api.GetHistoricalExchangeRate(timestamp)
if err != nil {
p.logger.Error("failed to fetch historical exchange rate", zap.Error(err))
return err
}
// Assuming you want to store rates for a specific currency, say "USD"
rate, exists := rates[usdSymbol]
if !exists {
p.logger.Error("USD rate not found for timestamp", zap.String("timestamp", timestamp.String()))
return errors.New("USD rate not found for timestamp")
}
// Create a new record in the database for each fetched rate
priceRecord := &models.SCPriceHistory{
Rate: rate,
CreatedAt: timestamp,
}
err = p.db.Create(&priceRecord).Error
if err != nil {
p.logger.Error("failed to create historical record", zap.Error(err))
return err
}
}
}
return nil
}
type PriceTrackerParams struct {
fx.In
Config *config.Manager
Logger *zap.Logger
Cron *cron.CronServiceDefault
Db *gorm.DB
Renter *RenterDefault
PriceApi *siasdk.APIClient
}
func (p PriceTracker) init() error {
p.cron.RegisterService(p)
p.api = apisdkgo.NewSiaClient()
err := p.importPrices()
if err != nil {
p.logger.Error("failed to import prices", zap.Error(err))
return err
}
err = p.updatePrices()
if err != nil {
p.logger.Error("failed to update prices", zap.Error(err))
return err
}
return nil
}
func NewPriceTracker(params PriceTrackerParams) *PriceTracker {
return &PriceTracker{
config: params.Config,
logger: params.Logger,
cron: params.Cron,
db: params.Db,
renter: params.Renter,
api: params.PriceApi,
}
}
func siacoinsFromFloat(f float64) (types.Currency, error) {
r := new(big.Rat).SetFloat64(f)
r.Mul(r, new(big.Rat).SetInt(types.HastingsPerSiacoin.Big()))
i := new(big.Int).Div(r.Num(), r.Denom())
if i.Sign() < 0 {
return types.ZeroCurrency, errors.New("value cannot be negative")
} else if i.BitLen() > 128 {
return types.ZeroCurrency, errors.New("value overflows Currency representation")
}
return types.NewCurrency(i.Uint64(), new(big.Int).Rsh(i, 64).Uint64()), nil
}