switch to pgx driver + create merch

pkg/dbase/handler.go

@@ -1,9 +1,10 @@
 package dbase
 
 import (
-	"database/sql"
+	"context"
 	"fmt"
-	_ "github.com/lib/pq"
+	_ "github.com/jackc/pgx"
+	"github.com/jackc/pgx/v5/pgxpool"
 )
 
 type Deps struct {
@@ -14,20 +15,24 @@ type Deps struct {
 	DBName   string
 }
 
-func Connect(deps Deps) (*sql.DB, error) {
-	dsn := fmt.Sprintf(
-		"host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
+func ConnectPool(ctx context.Context, deps Deps) (*pgxpool.Pool, error) {
+	connString := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s",
 		deps.Host, deps.Port, deps.Username, deps.Password, deps.DBName)
 
-	db, err := sql.Open("postgres", dsn)
+	config, err := pgxpool.ParseConfig(connString)
 	if err != nil {
 		return nil, err
 	}
 
-	if err = db.Ping(); err != nil {
-		db.Close()
-		return nil, fmt.Errorf("failed to connect to DB: %w", err)
+	pool, err := pgxpool.NewWithConfig(ctx, config)
+	if err != nil {
+		return nil, err
 	}
 
-	return db, nil
+	if err = pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, err
+	}
+
+	return pool, nil
 }