Added: creating database, sql tx repository

internal/db/repository.go

@@ -0,0 +1,34 @@
+package db
+
+import (
+	"database/sql"
+)
+
+type TxRepository struct {
+	db *sql.DB
+}
+
+func NewTxRepository(instance *sql.DB) ITxRepository {
+	return &TxRepository{
+		db: instance,
+	}
+}
+
+func (t TxRepository) Begin() (*sql.Tx, error) {
+	tx, err := t.db.Begin()
+	if err != nil {
+		return nil, err
+	}
+
+	return tx, nil
+}
+
+func (TxRepository) RollbackOnError(tx *sql.Tx, errObserve *error) {
+	if *errObserve != nil {
+		tx.Rollback()
+	}
+}
+
+func (TxRepository) Commit(tx *sql.Tx) error {
+	return tx.Commit()
+}