# Recurring Payment

<table><thead><tr><th>Key</th><th>Description</th></tr></thead><tbody><tr><td><pre><code>SubscriptionId
</code></pre></td><td>Recurring payment identifier</td></tr><tr><td><pre><code>SubscriptionType
</code></pre></td><td><p>Recurring payment type</p><p><br>See: <a href="broken-reference">Review</a></p></td></tr><tr><td><pre><code>SubscriptionCode
</code></pre></td><td>Paywall tracking number of the recurring payment</td></tr><tr><td><pre><code>SubscriptionMerchantCode
</code></pre></td><td>Tracking number provided at the time of creation</td></tr><tr><td><pre><code>Amount
</code></pre></td><td>Recurring payment amount</td></tr><tr><td><pre><code>Success
</code></pre></td><td>True | False</td></tr><tr><td><pre><code>FailReason
</code></pre></td><td>Reason for failure when unsuccessful</td></tr><tr><td><pre><code>PaymentId
</code></pre></td><td>Paywall payment identifier</td></tr><tr><td><pre><code>Attempt
</code></pre></td><td>Number of attempts</td></tr><tr><td><pre><code>AttemptFinished
</code></pre></td><td>Information on whether the attempt has ended</td></tr><tr><td><pre><code>Hash
</code></pre></td><td><p><strong>The Hash value used to verify that the notification was sent from Paywall.</strong><br>It is generated using the <strong><code>System Webhook Hash Key</code></strong> activated in the Paywall panel.</p><p></p><p>The key mentioned above may vary depending on the value of the <code>HashKeyType</code> parameter. A dynamic structure should be implemented.</p></td></tr><tr><td><pre><code>HashFormat
</code></pre></td><td>The format type used to generate the hash value<br><br>See: <a href="broken-reference">Hash Formats</a></td></tr><tr><td><pre><code>HashKeyType
</code></pre></td><td>The type of key used in generating the hash value<br><br>See: <a href="broken-reference">Key Types </a></td></tr></tbody></table>