diff --git a/app/Models/Gateway.php b/app/Models/Gateway.php
index 0faadebd6819..e62221d8b02e 100644
--- a/app/Models/Gateway.php
+++ b/app/Models/Gateway.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Invoice Ninja (https://invoiceninja.com).
  *
@@ -90,7 +91,7 @@ class Gateway extends StaticModel
 
         if ($this->id == 1) {
             $link = 'http://reseller.authorize.net/application/?id=5560364';
-        } elseif (in_array($this->id, [15,60,61])) {
+        } elseif (in_array($this->id, [15, 60, 61])) {
             $link = 'https://www.paypal.com/us/cgi-bin/webscr?cmd=_login-api-run';
         } elseif ($this->id == 24) {
             $link = 'https://www.2checkout.com/referral?r=2c37ac2298';
@@ -102,6 +103,8 @@ class Gateway extends StaticModel
             $link = 'https://dashboard.stripe.com/account/apikeys';
         } elseif ($this->id == 59) {
             $link = 'https://www.forte.net/';
+        } elseif ($this->id == 62) {
+            $link = 'https://docs.btcpayserver.org';
         }
 
         return $link;
@@ -137,8 +140,8 @@ class Gateway extends StaticModel
             case 56:
                 return [
                     GatewayType::CREDIT_CARD => ['refund' => true, 'token_billing' => true, 'webhooks' => ['payment_intent.succeeded', 'payment_intent.payment_failed']],
-                    GatewayType::BANK_TRANSFER => ['refund' => true, 'token_billing' => true, 'webhooks' => ['source.chargeable', 'charge.succeeded', 'customer.source.updated','payment_intent.processing', 'payment_intent.payment_failed', 'charge.failed']],
-                    GatewayType::DIRECT_DEBIT => ['refund' => false, 'token_billing' => false, 'webhooks' => ['payment_intent.processing','payment_intent.succeeded','payment_intent.partially_funded', 'payment_intent.payment_failed']],
+                    GatewayType::BANK_TRANSFER => ['refund' => true, 'token_billing' => true, 'webhooks' => ['source.chargeable', 'charge.succeeded', 'customer.source.updated', 'payment_intent.processing', 'payment_intent.payment_failed', 'charge.failed']],
+                    GatewayType::DIRECT_DEBIT => ['refund' => false, 'token_billing' => false, 'webhooks' => ['payment_intent.processing', 'payment_intent.succeeded', 'payment_intent.partially_funded', 'payment_intent.payment_failed']],
                     GatewayType::ALIPAY => ['refund' => false, 'token_billing' => false],
                     GatewayType::APPLE_PAY => ['refund' => false, 'token_billing' => false],
                     GatewayType::BACS => ['refund' => true, 'token_billing' => true, 'webhooks' => ['source.chargeable', 'charge.succeeded', 'charge.failed', 'payment_intent.processing', 'payment_intent.succeeded', 'mandate.updated', 'payment_intent.payment_failed']],
@@ -152,7 +155,7 @@ class Gateway extends StaticModel
                     GatewayType::BECS => ['refund' => true, 'token_billing' => true, 'webhooks' => ['source.chargeable', 'charge.succeeded', 'charge.failed', 'payment_intent.succeeded', 'payment_intent.payment_failed']],
                     GatewayType::IDEAL => ['refund' => true, 'token_billing' => true, 'webhooks' => ['source.chargeable', 'charge.succeeded', 'charge.failed', 'payment_intent.succeeded', 'payment_intent.payment_failed']],
                     GatewayType::ACSS => ['refund' => true, 'token_billing' => true, 'webhooks' => ['source.chargeable', 'charge.succeeded', 'charge.failed', 'payment_intent.succeeded', 'payment_intent.payment_failed']],
-                    GatewayType::FPX => ['refund' => true, 'token_billing' => true, 'webhooks' => ['source.chargeable', 'charge.succeeded', 'charge.failed', ]],
+                    GatewayType::FPX => ['refund' => true, 'token_billing' => true, 'webhooks' => ['source.chargeable', 'charge.succeeded', 'charge.failed',]],
                 ];
             case 39:
                 return [GatewayType::CREDIT_CARD => ['refund' => true, 'token_billing' => true, 'webhooks' => [' ']]]; //Checkout
@@ -175,10 +178,10 @@ class Gateway extends StaticModel
                 ];
             case 52:
                 return [
-                    GatewayType::BANK_TRANSFER => ['refund' => false, 'token_billing' => true, 'webhooks' => ['confirmed','paid_out','failed','fulfilled']], // GoCardless
-                    GatewayType::DIRECT_DEBIT => ['refund' => false, 'token_billing' => true, 'webhooks' => ['confirmed','paid_out','failed','fulfilled']],
-                    GatewayType::SEPA => ['refund' => false, 'token_billing' => true, 'webhooks' => ['confirmed','paid_out','failed','fulfilled']],
-                    GatewayType::INSTANT_BANK_PAY => ['refund' => false, 'token_billing' => true, 'webhooks' => ['confirmed','paid_out','failed','fulfilled']],
+                    GatewayType::BANK_TRANSFER => ['refund' => false, 'token_billing' => true, 'webhooks' => ['confirmed', 'paid_out', 'failed', 'fulfilled']], // GoCardless
+                    GatewayType::DIRECT_DEBIT => ['refund' => false, 'token_billing' => true, 'webhooks' => ['confirmed', 'paid_out', 'failed', 'fulfilled']],
+                    GatewayType::SEPA => ['refund' => false, 'token_billing' => true, 'webhooks' => ['confirmed', 'paid_out', 'failed', 'fulfilled']],
+                    GatewayType::INSTANT_BANK_PAY => ['refund' => false, 'token_billing' => true, 'webhooks' => ['confirmed', 'paid_out', 'failed', 'fulfilled']],
                 ];
             case 58:
                 return [
@@ -217,6 +220,10 @@ class Gateway extends StaticModel
                     // GatewayType::PRZELEWY24 => ['refund' => false, 'token_billing' => false],
                     // GatewayType::SOFORT => ['refund' => false, 'token_billing' => false],
                 ]; //Paypal PPCP
+            case 62:
+                return [
+                    GatewayType::CRYPTO => ['refund' => true, 'token_billing' => false, 'webhooks' => ['confirmed', 'paid_out', 'failed', 'fulfilled']],
+                ]; //BTCPay
             default:
                 return [];
         }
diff --git a/app/PaymentDrivers/BTCPay/BTCPay.php b/app/PaymentDrivers/BTCPay/BTCPay.php
new file mode 100644
index 000000000000..708018b30a46
--- /dev/null
+++ b/app/PaymentDrivers/BTCPay/BTCPay.php
@@ -0,0 +1,147 @@
+<?php
+
+/**
+ * Invoice Ninja (https://invoiceninja.com).
+ *
+ * @link https://github.com/invoiceninja/invoiceninja source repository
+ *
+ * @copyright Copyright (c) 2023. Invoice Ninja LLC (https://invoiceninja.com)
+ *
+ * @license https://www.elastic.co/licensing/elastic-license
+ */
+
+namespace App\PaymentDrivers\BTCPay;
+
+use App\Models\GatewayType;
+use App\Models\Payment;
+use App\Models\PaymentType;
+use App\PaymentDrivers\BTCPayPaymentDriver;
+use App\Utils\Traits\MakesHash;
+use App\PaymentDrivers\Common\MethodInterface;
+use App\Http\Requests\ClientPortal\Payments\PaymentResponseRequest;
+use App\Exceptions\PaymentFailed;
+
+class BTCPay implements MethodInterface
+{
+    use MakesHash;
+
+    public $driver_class;
+
+    public function __construct(BTCPayPaymentDriver $driver_class)
+    {
+        $this->driver_class = $driver_class;
+        $this->driver_class->init();
+    }
+
+    public function authorizeView($data)
+    {
+    }
+
+    public function authorizeRequest($request)
+    {
+    }
+    public function authorizeResponse($request)
+    {
+    }
+
+    public function paymentView($data)
+    {
+        $data['gateway'] = $this->driver_class;
+        $data['amount'] = $data['total']['amount_with_fee'];
+        $data['currency'] = $this->driver_class->client->getCurrencyCode();
+
+        return render('gateways.btcpay.pay', $data);
+    }
+
+    public function paymentResponse(PaymentResponseRequest $request)
+    {
+
+        $request->validate([
+            'payment_hash' => ['required'],
+            'amount' => ['required'],
+            'currency' => ['required'],
+        ]);
+
+        $drv = $this->driver_class;
+        if (
+            strlen($drv->btcpay_url) < 1
+            || strlen($drv->api_key) < 1
+            || strlen($drv->store_id) < 1
+            || strlen($drv->webhook_secret) < 1
+        ) {
+            throw new PaymentFailed('BTCPay is not well configured');
+        }
+        if (!filter_var($this->driver_class->btcpay_url, FILTER_VALIDATE_URL)) {
+            throw new PaymentFailed('Wrong format for BTCPay Url');
+        }
+
+        try {
+            $_invoice = collect($drv->payment_hash->data->invoices)->first();
+            $cli = $drv->client;
+
+            $dataPayment = [
+                'payment_method' => $drv->payment_method,
+                'payment_type' => PaymentType::CRYPTO,
+                'amount' => $request->amount,
+                'gateway_type_id' => GatewayType::CRYPTO,
+                'transaction_reference' =>  'xxx'
+            ];
+            $payment = $drv->createPayment($dataPayment, \App\Models\Payment::STATUS_PENDING);
+
+            $metaData = [
+                'buyerName' => $cli->name,
+                'buyerAddress1' => $cli->address1,
+                'buyerAddress2' =>  $cli->address2,
+                'buyerCity' =>  $cli->city,
+                'buyerState' => $cli->state,
+                'buyerZip' => $cli->postal_code,
+                'buyerCountry' => $cli->country_id,
+                'buyerPhone' => $cli->phone,
+                'itemDesc' => "From InvoiceNinja",
+                'paymentID' => $payment->id
+            ];
+
+
+            $urlRedirect = redirect()->route('client.payments.show', ['payment' => $payment->hashed_id])->getTargetUrl();
+            $checkoutOptions = new \BTCPayServer\Client\InvoiceCheckoutOptions();
+            $checkoutOptions->setRedirectURL($urlRedirect);
+
+            $client = new \BTCPayServer\Client\Invoice($drv->btcpay_url, $drv->api_key);
+            $rep = $client->createInvoice(
+                $drv->store_id,
+                $request->currency,
+                \BTCPayServer\Util\PreciseNumber::parseString($request->amount),
+                $_invoice->invoice_number,
+                $cli->present()->email(),
+                $metaData,
+                $checkoutOptions
+            );
+            $payment->transaction_reference = $rep->getId();
+            $payment->save();
+
+            return redirect($rep->getCheckoutLink());
+        } catch (\Throwable $e) {
+            throw new PaymentFailed('Error during BTCPay payment : ' . $e->getMessage());
+        }
+    }
+
+    public function refund(Payment $payment, $amount)
+    {
+        try {
+            $invoice = $payment->invoices()->first();
+            $isPartialRefund = ($amount < $payment->amount);
+
+            $client = new \BTCPayServer\Client\Invoice($this->driver_class->btcpay_url, $this->driver_class->api_key);
+            $refund = $client->refundInvoice($this->driver_class->store_id,  $payment->transaction_reference);
+
+           /* $data = [];
+            $data['InvoiceNumber'] = $invoice->number;
+            $data['isPartialRefund'] = $isPartialRefund;
+            $data['BTCPayLink'] = $refund->getViewLink();*/
+
+            return $refund->getViewLink();
+        } catch (\Throwable $e) {
+            throw new PaymentFailed('Error during BTCPay refund : ' . $e->getMessage());
+        }
+    }
+}
diff --git a/app/PaymentDrivers/BTCPayPaymentDriver.php b/app/PaymentDrivers/BTCPayPaymentDriver.php
new file mode 100644
index 000000000000..4ede193c149b
--- /dev/null
+++ b/app/PaymentDrivers/BTCPayPaymentDriver.php
@@ -0,0 +1,138 @@
+<?php
+
+/**
+ * Invoice Ninja (https://invoiceninja.com).
+ *
+ * @link https://github.com/invoiceninja/invoiceninja source repository
+ *
+ * @copyright Copyright (c) 2021. Invoice Ninja LLC (https://invoiceninja.com)
+ *
+ * @license https://opensource.org/licenses/AAL
+ */
+
+namespace App\PaymentDrivers;
+
+use App\Utils\Traits\MakesHash;
+use App\Models\GatewayType;
+use App\PaymentDrivers\BTCPay\BTCPay;
+use App\Models\SystemLog;
+use App\Models\Payment;
+use App\Exceptions\PaymentFailed;
+
+use BTCPayServer\Client\Webhook;
+
+class BTCPayPaymentDriver extends BaseDriver
+{
+    use MakesHash;
+
+    public $refundable = true; //does this gateway support refunds?
+
+    public $token_billing = false; //does this gateway support token billing?
+
+    public $can_authorise_credit_card = false; //does this gateway support authorizations?
+
+    public $gateway; //initialized gateway
+
+    public $payment_method; //initialized payment method
+
+    public static $methods = [
+        GatewayType::CRYPTO => BTCPay::class, //maps GatewayType => Implementation class
+    ];
+
+    const SYSTEM_LOG_TYPE = SystemLog::TYPE_CHECKOUT; //define a constant for your gateway ie TYPE_YOUR_CUSTOM_GATEWAY - set the const in the SystemLog model
+
+    public $btcpay_url  = "";
+    public $api_key  = "";
+    public $store_id = "";
+    public $webhook_secret = "";
+    public $btcpay;
+
+
+    public function init()
+    {
+        $this->btcpay_url = $this->company_gateway->getConfigField('btcpayUrl');
+        $this->api_key = $this->company_gateway->getConfigField('apiKey');
+        $this->store_id = $this->company_gateway->getConfigField('storeId');
+        $this->webhook_secret = $this->company_gateway->getConfigField('webhookSecret');
+        return $this; /* This is where you boot the gateway with your auth credentials*/
+    }
+
+    /* Returns an array of gateway types for the payment gateway */
+    public function gatewayTypes(): array
+    {
+        $types = [];
+
+        $types[] = GatewayType::CRYPTO;
+
+        return $types;
+    }
+
+    public function setPaymentMethod($payment_method_id)
+    {
+        $class = self::$methods[$payment_method_id];
+        $this->payment_method = new $class($this);
+        return $this;
+    }
+
+    public function processPaymentView(array $data)
+    {
+        return $this->payment_method->paymentView($data);  //this is your custom implementation from here
+    }
+
+    public function processWebhookRequest()
+    {
+        $webhook_payload = file_get_contents('php://input');
+        //file_put_contents("/home/claude/invoiceninja/storage/my.log", $webhook_payload);
+
+        $btcpayRep = json_decode($webhook_payload);
+        if ($btcpayRep == null) {
+            throw new PaymentFailed('Empty data');
+        }
+        if (true === empty($btcpayRep->invoiceId)) {
+            throw new PaymentFailed(
+                'Invalid BTCPayServer payment notification- did not receive invoice ID.'
+            );
+        }
+        if (str_starts_with($btcpayRep->invoiceId, "__test__") || $btcpayRep->type == "InvoiceCreated") {
+            return;
+        }
+
+        $headers = getallheaders();
+        foreach ($headers as $key => $value) {
+            if (strtolower($key) === 'btcpay-sig') {
+                $sig = $value;
+            }
+        }
+
+        $this->init();
+        $webhookClient = new Webhook($this->btcpay_url, $this->api_key);
+
+        if (!$webhookClient->isIncomingWebhookRequestValid($webhook_payload, $sig, $this->webhook_secret)) {
+            throw new \RuntimeException(
+                'Invalid BTCPayServer payment notification message received - signature did not match.'
+            );
+        }
+
+        /** @var \App\Models\Payment $payment **/
+        $payment = Payment::find($btcpayRep->metafata->paymentID);
+        switch ($btcpayRep->type) {
+            case "InvoiceExpired":
+                $payment->status_id = Payment::STATUS_CANCELLED;
+                break;
+            case "InvoiceInvalid":
+                $payment->status_id = Payment::STATUS_FAILED;
+                break;
+            case "InvoiceSettled":
+                $payment->status_id = Payment::STATUS_COMPLETED;
+                break;
+        }
+        $payment->save();
+    }
+
+
+    public function refund(Payment $payment, $amount, $return_client_response = false)
+    {
+        $this->setPaymentMethod(GatewayType::CRYPTO);
+        return $this->payment_method->refund($payment, $amount); //this is your custom implementation from here
+    }
+}
diff --git a/composer.json b/composer.json
index cd273d7f6ea7..5e8f755d91e7 100644
--- a/composer.json
+++ b/composer.json
@@ -42,6 +42,7 @@
         "bacon/bacon-qr-code": "^2.0",
         "beganovich/snappdf": "^4",
         "braintree/braintree_php": "^6.0",
+        "btcpayserver/btcpayserver-greenfield-php": "^2.6",
         "checkout/checkout-sdk-php": "^3.0",
         "invoiceninja/ubl_invoice": "^2",
         "doctrine/dbal": "^3.0",
diff --git a/composer.lock b/composer.lock
index b148de831539..6b497a2a6f50 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1687,6 +1687,60 @@
             ],
             "time": "2023-01-15T23:15:59+00:00"
         },
+        {
+            "name": "btcpayserver/btcpayserver-greenfield-php",
+            "version": "v2.6.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/btcpayserver/btcpayserver-greenfield-php.git",
+                "reference": "c115b0415719b9fe6e35d5df5f291646d4af2240"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/btcpayserver/btcpayserver-greenfield-php/zipball/c115b0415719b9fe6e35d5df5f291646d4af2240",
+                "reference": "c115b0415719b9fe6e35d5df5f291646d4af2240",
+                "shasum": ""
+            },
+            "require": {
+                "ext-bcmath": "*",
+                "ext-curl": "*",
+                "ext-json": "*",
+                "ext-mbstring": "*",
+                "php": ">=8.0"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^3.0",
+                "phpunit/phpunit": "^9.5",
+                "vimeo/psalm": "^4.8",
+                "vlucas/phpdotenv": "^5.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "BTCPayServer\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Wouter Samaey",
+                    "email": "wouter.samaey@storefront.be"
+                },
+                {
+                    "name": "Andreas Tasch",
+                    "email": "andy.tasch@gmail.com"
+                }
+            ],
+            "description": "BTCPay Server Greenfield API PHP client library.",
+            "support": {
+                "issues": "https://github.com/btcpayserver/btcpayserver-greenfield-php/issues",
+                "source": "https://github.com/btcpayserver/btcpayserver-greenfield-php/tree/v2.6.0"
+            },
+            "time": "2024-04-25T09:19:49+00:00"
+        },
         {
             "name": "carbonphp/carbon-doctrine-types",
             "version": "2.1.0",
diff --git a/database/migrations/2024_05_03_145535_btcpay_gateway.php b/database/migrations/2024_05_03_145535_btcpay_gateway.php
new file mode 100644
index 000000000000..5f952ce4ff76
--- /dev/null
+++ b/database/migrations/2024_05_03_145535_btcpay_gateway.php
@@ -0,0 +1,42 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use App\Models\Gateway;
+use App\Models\GatewayType;
+use Illuminate\Support\Str;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $gateway = new Gateway;
+        $gateway->name = 'BTCPay';
+        $gateway->key = 'vpyfbmdrkqcicpkjqdusgjfluebftuva';
+        $gateway->provider = 'BTCPay';
+        $gateway->is_offsite = true;
+
+        $btcpayFieds =  new \stdClass;
+        $btcpayFieds->btcpayUrl  = "";
+        $btcpayFieds->apiKey  = "";
+        $btcpayFieds->storeId = "";
+        $btcpayFieds->webhookSecret = "";
+        $gateway->fields = \json_encode($btcpayFieds);
+
+
+        $gateway->visible = true;
+        $gateway->site_url = 'https://btcpayserver.org';
+        $gateway->default_gateway_type_id = GatewayType::CRYPTO;
+        $gateway->save();
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        //
+    }
+};
diff --git a/resources/views/portal/ninja2020/gateways/btcpay/pay.blade.php b/resources/views/portal/ninja2020/gateways/btcpay/pay.blade.php
new file mode 100644
index 000000000000..a53ac383fb09
--- /dev/null
+++ b/resources/views/portal/ninja2020/gateways/btcpay/pay.blade.php
@@ -0,0 +1,28 @@
+@extends('portal.ninja2020.layout.payments', ['gateway_title' => ctrans('texts.payment_type_Crypto'), 'card_title' => ctrans('texts.payment_type_Crypto')])
+
+@section('gateway_content')
+    <div class="alert alert-failure mb-4" hidden id="errors"></div>
+
+    @include('portal.ninja2020.gateways.includes.payment_details')
+
+    <form action="{{ route('client.payments.response') }}" method="post" id="server-response">
+        @csrf
+        <input type="hidden" name="gateway_response">
+        <input type="hidden" name="company_gateway_id" value="{{ $gateway->getCompanyGatewayId() }}">
+        <input type="hidden" name="payment_method_id" value="{{ $payment_method_id }}">
+        <input type="hidden" name="token">
+        <input type="hidden" name="amount" value="{{ $amount }}">
+        <input type="hidden" name="currency" value="{{ $currency }}">
+        <input type="hidden" name="payment_hash" value="{{ $payment_hash }}">
+    </form>
+
+    @include('portal.ninja2020.gateways.includes.pay_now')
+@endsection
+
+@push('footer')
+    <script>
+        document.getElementById('pay-now').addEventListener('click', function() {
+            document.getElementById('server-response').submit();
+        });
+    </script>
+@endpush