Turning on token billing for PayFast

app/PaymentDrivers/PayFast/Token.php

@@ -79,26 +79,17 @@ class Token
 
 		$header =[
             'merchant-id' => $this->payfast->company_gateway->getConfigField('merchantId'),
-            'version' => 'v1',
             'timestamp' => now()->format('c'),
+            'version' => 'v1',
 		];
 
-        $body = [
+        $body['body'] = [
-            'merchant_id' => $this->payfast->company_gateway->getConfigField('merchantId'),
-            'merchant_key' => $this->payfast->company_gateway->getConfigField('merchantKey'),
-            'return_url' => route('client.payment_methods.index'),
-            'cancel_url' => route('client.payment_methods.index'),
-            'notify_url' => $this->payfast->genericWebhookUrl(),
-            'm_payment_id' => $payment_hash->hash,
             'amount' => $amount,
             'item_name' => 'purchase',
             'item_description' => 'Purchase',
-            'subscription_type' => 1,
-            'passphrase' => $this->payfast->company_gateway->getConfigField('passphrase'),
-
         ];        
 
-        $header['signature'] = $this->payfast->generateSignature($body);
+        $header['signature'] = $this->generate_parameter_string(array_merge($header, $body));
         //$header['signature'] = $this->genSig($body);
 
         nlog($this->payfast->company_gateway->getConfigField('merchantId'));
@@ -147,6 +138,43 @@ class Token
         // }
     }
 
+
+    protected function generate_parameter_string( $api_data, $sort_data_before_merge = true, $skip_empty_values = true ) {
+
+        // if sorting is required the passphrase should be added in before sort.
+        if ( ! empty( $this->pass_phrase ) && $sort_data_before_merge ) {
+            $api_data['passphrase'] = $this->payfast->company_gateway->getConfigField('passPhrase');
+        }
+
+        if ( $sort_data_before_merge ) {
+            ksort( $api_data );
+        }
+
+        // concatenate the array key value pairs.
+        $parameter_string = '';
+        foreach ( $api_data as $key => $val ) {
+
+            if ( $skip_empty_values && empty( $val ) ) {
+                continue;
+            }
+
+            if ( 'signature' !== $key ) {
+                $val = urlencode( $val );
+                $parameter_string .= "$key=$val&";
+            }
+        }
+        // when not sorting passphrase should be added to the end before md5
+        if ( $sort_data_before_merge ) {
+            $parameter_string = rtrim( $parameter_string, '&' );
+        } elseif ( ! empty( $this->pass_phrase ) ) {
+            $parameter_string .= 'passphrase=' . urlencode( $this->pass_phrase );
+        } else {
+            $parameter_string = rtrim( $parameter_string, '&' );
+        }
+
+        return $parameter_string;
+    }
+
     private function genSig($data)
     {
     	$fields = [];