Your IP : 216.73.217.77
<?php
namespace Tzsk\Payu;
class Checksum
{
const REVERSE = true;
protected string $salt;
protected array $keys = [
'key', 'txnid', 'amount', 'productinfo', 'firstname', 'email',
];
public function __construct(string $salt)
{
$this->salt = $salt;
}
public static function with($salt): self
{
return new self($salt);
}
public function create(array $fields): string
{
return $this->generate($fields);
}
public function match(array $fields, string $hash): bool
{
return $this->generate($fields, self::REVERSE) == $hash;
}
public function generate(array $fields, bool $reverse = false)
{
$keys = collect($this->keys)
->merge(collect(range(1, 10))->map(fn (int $index) => "udf{$index}"));
$keys = $reverse ? $keys->merge(['status', 'salt'])->reverse() : $keys->merge(['salt']);
$attributes = collect($fields)
->put('salt', $this->salt)
->all();
return hash('sha512', implode('|', $this->getSequence($attributes, $keys->all())));
}
protected function getSequence(array $fields, array $keys): array
{
$sequence = [];
foreach ($keys as $key) {
$sequence[] = data_get($fields, $key);
}
return $sequence;
}
}