25 lines
1.2 KiB
PHP
25 lines
1.2 KiB
PHP
<?php
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namespace App\Services\Payments;
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use Illuminate\Http\Request;
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use RuntimeException;
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final class PaddleWebhookVerifier implements WebhookVerifier
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{
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public function verify(Request $request, string $rawBody): void
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{
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$secret = (string) config('rsync-studio.paddle.webhook_secret');
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$header = (string) $request->header('Paddle-Signature');
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if ($secret === '' || $header === '') throw new RuntimeException('Paddle webhook verification is not configured.');
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$parts = [];
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foreach (explode(';', $header) as $part) { [$k,$v] = array_pad(explode('=',trim($part),2),2,null); if ($k && $v) $parts[$k][]=$v; }
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$ts = isset($parts['ts'][0]) ? (int)$parts['ts'][0] : 0;
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$signatures = $parts['h1'] ?? [];
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$tolerance = max(1,(int)config('rsync-studio.paddle.timestamp_tolerance',300));
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if (!$ts || abs(time()-$ts)>$tolerance) throw new RuntimeException('Paddle webhook timestamp is outside the allowed tolerance.');
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$expected = hash_hmac('sha256', $ts.':'.$rawBody, $secret);
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foreach ($signatures as $signature) if (hash_equals($expected,$signature)) return;
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throw new RuntimeException('Paddle webhook signature is invalid.');
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}
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}
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