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trade.go
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trade.go
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package service
import (
"github.com/jmoiron/sqlx"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"github.com/c9s/bbgo/pkg/types"
)
type TradeService struct {
DB *sqlx.DB
}
func NewTradeService(db *sqlx.DB) *TradeService {
return &TradeService{db}
}
// QueryLast queries the last trade from the database
func (s *TradeService) QueryLast(ex types.ExchangeName, symbol string) (*types.Trade, error) {
log.Infof("querying last trade exchange = %s AND symbol = %s", ex, symbol)
rows, err := s.DB.NamedQuery(`SELECT * FROM trades WHERE exchange = :exchange AND symbol = :symbol ORDER BY gid DESC LIMIT 1`, map[string]interface{}{
"symbol": symbol,
"exchange": ex,
})
if err != nil {
return nil, errors.Wrap(err, "query last trade error")
}
if rows.Err() != nil {
return nil, rows.Err()
}
defer rows.Close()
if rows.Next() {
var trade types.Trade
err = rows.StructScan(&trade)
return &trade, err
}
return nil, rows.Err()
}
func (s *TradeService) QueryForTradingFeeCurrency(ex types.ExchangeName, symbol string, feeCurrency string) ([]types.Trade, error) {
rows, err := s.DB.NamedQuery(`SELECT * FROM trades WHERE exchange = :exchange AND (symbol = :symbol OR fee_currency = :fee_currency) ORDER BY traded_at ASC`, map[string]interface{}{
"exchange": ex,
"symbol": symbol,
"fee_currency": feeCurrency,
})
if err != nil {
return nil, err
}
defer rows.Close()
return s.scanRows(rows)
}
func (s *TradeService) Query(ex types.ExchangeName, symbol string) ([]types.Trade, error) {
rows, err := s.DB.NamedQuery(`SELECT * FROM trades WHERE exchange = :exchange AND symbol = :symbol ORDER BY gid ASC`, map[string]interface{}{
"exchange": ex,
"symbol": symbol,
})
if err != nil {
return nil, err
}
defer rows.Close()
return s.scanRows(rows)
}
func (s *TradeService) scanRows(rows *sqlx.Rows) (trades []types.Trade, err error) {
for rows.Next() {
var trade types.Trade
if err := rows.StructScan(&trade); err != nil {
return trades, err
}
trades = append(trades, trade)
}
return trades, rows.Err()
}
func (s *TradeService) Insert(trade types.Trade) error {
_, err := s.DB.NamedExec(`
INSERT IGNORE INTO trades (id, exchange, order_id, symbol, price, quantity, quote_quantity, side, is_buyer, is_maker, fee, fee_currency, traded_at)
VALUES (:id, :exchange, :order_id, :symbol, :price, :quantity, :quote_quantity, :side, :is_buyer, :is_maker, :fee, :fee_currency, :traded_at)`,
trade)
return err
}