def _be_validated(tx, sha_hash, block_number):
    """
    Action when the transfer ins found in a block

    :param sakia.data.entities.Transaction tx: the transaction
    :param bool rollback: True if we are in a rollback procedure
    :param str sha_hash: The tx sha_hash found in history
    :param int block_number: The block_number where the tx was found
    """
    tx.written_block = block_number
