lib/Jejik/MT940/Parser/Sns.php
protected function contraAccountNumber(array $lines)
    {
        if (!isset($lines[1])) {
            return null;
        }

        if (preg_match('/^([0-9]{10}) /', $lines[1], $match)) {
            return ltrim($match[1], '0');
        }

        return null;
    }
protected function contraAccountNumber(array $lines)
    {
        if (!isset($lines[1])) {
            return null;
        }

        if (preg_match('/^([0-9]{10}) /', $lines[1], $match)) {
            return ltrim($match[1], '0');
        }

        return null;
    }
Get the contra account from a transaction

@param array $lines The transaction text at offset 0 and the description at offset 1
@return string|null