price pipeline

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

internal/store/ticker_cache.go

@@ -0,0 +1,31 @@
+package store
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5"
+)
+
+// GetTicker retourne le ticker (ou CoinGecko ID) mis en cache pour un instrument.
+// Retourne pgx.ErrNoRows si absent.
+func (s *Store) GetTicker(ctx context.Context, instrumentID int32) (string, error) {
+	var ticker string
+	err := s.pool.QueryRow(ctx,
+		`SELECT ticker FROM instrument_ticker_cache WHERE instrument_id = $1`,
+		instrumentID).Scan(&ticker)
+	return ticker, err
+}
+
+// UpsertTicker met à jour ou insère le ticker pour un instrument.
+func (s *Store) UpsertTicker(ctx context.Context, instrumentID int32, ticker string) error {
+	_, err := s.pool.Exec(ctx,
+		`INSERT INTO instrument_ticker_cache (instrument_id, ticker, fetched_at)
+		 VALUES ($1, $2, NOW())
+		 ON CONFLICT (instrument_id) DO UPDATE SET ticker = EXCLUDED.ticker, fetched_at = NOW()`,
+		instrumentID, ticker)
+	return err
+}
+
+func isNotFound(err error) bool {
+	return err == pgx.ErrNoRows
+}