# Hash Generation

🔑 **Private key** is a value accessible from your Paywall panel. This value is supported to be different for all possible scenarios. For example, the keys for 3D payments and APM payments are different. You should generate a separate key for each scenario and securely store these keys on your side.

The relevant keys will be included within the string value set used to generate the hash.

**Hash Examples:**

{% tabs %}
{% tab title="3D Hash" %}
You can obtain the hashKey information from the panel

<pre class="language-csharp"><code class="lang-csharp"><strong>var hashFormat = $"{hashKey}###{paymentId}###{merchantUniqueCode}###{amount}###{installment}"
</strong>
// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
</code></pre>

{% endtab %}

{% tab title="Payment" %}
You can obtain the hashKey information from the panel

```csharp
var hashFormat = $"{hashKey}###{paymentId}###{merchantUniqueCode}###{amount}###{installment}"

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}

{% tab title="Bulk Payment" %}
You can obtain the hashKey information from the panel

```csharp
var hashFormat = $"{hashKey}###{bulkPaymentId}###{merchantUniqueCode}"

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}

{% tab title="Split Payment" %}
You can obtain the hashKey information from the panel

```csharp
var hashFormat = $"{hashKey}###{splitPaymentId}###{merchantUniqueCode}"

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}

{% tab title="PayOut" %}
You can obtain the hashKey information from the panel

```csharp
var hashFormat = $"{hashKey}###{payoutId}###{merchantGroupCode}###{merchantUniqueCode}###{amount}"

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}
{% endtabs %}

{% tabs %}
{% tab title="Common Payment Page" %}
You can obtain the hashKey information from the panel

```csharp
var hashFormat = $"{hashKey}###{checkoutId}###{paymentId}###{uniqueCode}###{amount}"

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}

{% tab title="Link/Qr" %}
You can obtain the hashKey information from the panel

```csharp
var hashFormat = $"{hashKey}###{linkQrId}###{paymentId}###{trackId}###{orderId}###{amount}"

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}

{% tab title="APM" %}
You can obtain the hashKey information from the panel

```csharp
var hashFormat = $"{hashKey}###{apmId}###{merchantUniqueCode}###{amount}"

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}

{% tab title="Physical Pos" %}
You can obtain the **hashKey** information from the panel.

```csharp
var hashFormat = $"{key}###{paymentRequestId}###{merchantUniqueCode}###{amount}";

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}

{% tab title="General System" %}
You can obtain the hashKey information from the panel

```csharp
var hashFormat = $"{hashKey}###{paymentId}###{merchantUniqueCode}###{amount.ToString()}###{installment}"

// Create a SHA256
using var sha256Hash = SHA256.Create();
// ComputeHash - returns byte array  
var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(hashFormat));

// Convert byte array to a string   
var builder = new StringBuilder();
foreach (var t in bytes)
{
    builder.Append(t.ToString("x2"));
}
return builder.ToString();
```

{% endtab %}
{% endtabs %}