diff --git a/src/BitPaySDK/Model/Invoice/Invoice.php b/src/BitPaySDK/Model/Invoice/Invoice.php
index 6f4819f6..4c223fe7 100644
--- a/src/BitPaySDK/Model/Invoice/Invoice.php
+++ b/src/BitPaySDK/Model/Invoice/Invoice.php
@@ -78,9 +78,9 @@ class Invoice
     protected bool $extendedNotifications = false;
     protected ?bool $isCancelled = null;
     protected ?string $transactionCurrency = null;
-    protected ?int $underpaidAmount = null;
-    protected ?int $overpaidAmount = null;
-    protected ?int $amountPaid = null;
+    protected ?float $underpaidAmount = null;
+    protected ?float $overpaidAmount = null;
+    protected ?float $amountPaid = null;
     protected ?string $displayAmountPaid = null;
     protected ?array $exchangeRates = null;
     protected ?bool $bitpayIdRequired = null;
@@ -1455,9 +1455,9 @@ public function setPaymentCodes(?array $paymentCodes)
      * It equals to the absolute difference between amountPaid
      * and paymentTotals for the corresponding transactionCurrency used.
      *
-     * @return int|null
+     * @return float|null
      */
-    public function getUnderpaidAmount(): ?int
+    public function getUnderpaidAmount(): ?float
     {
         return $this->underpaidAmount;
     }
@@ -1470,9 +1470,9 @@ public function getUnderpaidAmount(): ?int
      * It equals to the absolute difference between amountPaid
      * and paymentTotals for the corresponding transactionCurrency used.
      *
-     * @param int $underpaidAmount the underpaid amount
+     * @param float|null $underpaidAmount the underpaid amount
      */
-    public function setUnderpaidAmount(int $underpaidAmount): void
+    public function setUnderpaidAmount(?float $underpaidAmount): void
     {
         $this->underpaidAmount = $underpaidAmount;
     }
@@ -1485,9 +1485,9 @@ public function setUnderpaidAmount(int $underpaidAmount): void
      * It equals to the absolute difference between amountPaid
      * and paymentTotals for the corresponding transactionCurrency used.
      *
-     * @return int|null
+     * @return float|null
      */
-    public function getOverpaidAmount(): ?int
+    public function getOverpaidAmount(): ?float
     {
         return $this->overpaidAmount;
     }
@@ -1500,9 +1500,9 @@ public function getOverpaidAmount(): ?int
      * It equals to the absolute difference between amountPaid
      * and paymentTotals for the corresponding transactionCurrency used.
      *
-     * @param int $overpaidAmount the overpaid amount
+     * @param float|null $overpaidAmount the overpaid amount
      */
-    public function setOverpaidAmount(int $overpaidAmount): void
+    public function setOverpaidAmount(?float $overpaidAmount): void
     {
         $this->overpaidAmount = $overpaidAmount;
     }
@@ -1714,9 +1714,9 @@ public function setTransactionCurrency(string $transactionCurrency): void
      * The total amount paid to the invoice in terms of the invoice transactionCurrency indicated
      * in the smallest possible unit for the corresponding transactionCurrency (e.g satoshis for BTC and BCH)
      *
-     * @return int|null
+     * @return float|null
      */
-    public function getAmountPaid(): ?int
+    public function getAmountPaid(): ?float
     {
         return $this->amountPaid;
     }
@@ -1727,9 +1727,9 @@ public function getAmountPaid(): ?int
      * The total amount paid to the invoice in terms of the invoice transactionCurrency indicated
      * in the smallest possible unit for the corresponding transactionCurrency (e.g satoshis for BTC and BCH)
      *
-     * @param int $amountPaid The total amount paid to the invoice
+     * @param float|null $amountPaid The total amount paid to the invoice
      */
-    public function setAmountPaid(int $amountPaid): void
+    public function setAmountPaid(?float $amountPaid): void
     {
         $this->amountPaid = $amountPaid;
     }
diff --git a/src/BitPaySDK/Model/Invoice/InvoiceWebhook.php b/src/BitPaySDK/Model/Invoice/InvoiceWebhook.php
index 9f601cb1..57fcb5c7 100644
--- a/src/BitPaySDK/Model/Invoice/InvoiceWebhook.php
+++ b/src/BitPaySDK/Model/Invoice/InvoiceWebhook.php
@@ -29,7 +29,7 @@ class InvoiceWebhook
     protected ?array $paymentSubtotals;
     protected ?array $paymentTotals;
     protected ?array $exchangeRates;
-    protected ?int $amountPaid;
+    protected ?float $amountPaid;
     protected ?string $orderId;
     protected ?string $transactionCurrency;
 
@@ -163,12 +163,12 @@ public function setExchangeRates(?array $exchangeRates): void
         $this->exchangeRates = $exchangeRates;
     }
 
-    public function getAmountPaid(): ?int
+    public function getAmountPaid(): ?float
     {
         return $this->amountPaid;
     }
 
-    public function setAmountPaid(?int $amountPaid): void
+    public function setAmountPaid(?float $amountPaid): void
     {
         $this->amountPaid = $amountPaid;
     }
diff --git a/src/BitPaySDK/Model/Invoice/RefundWebhook.php b/src/BitPaySDK/Model/Invoice/RefundWebhook.php
index 8299ca3d..ac2187ce 100644
--- a/src/BitPaySDK/Model/Invoice/RefundWebhook.php
+++ b/src/BitPaySDK/Model/Invoice/RefundWebhook.php
@@ -22,7 +22,7 @@ class RefundWebhook
     protected ?string $invoice = null;
     protected ?string $supportRequest = null;
     protected ?string $status = null;
-    protected ?int $amount = null;
+    protected ?float $amount = null;
     protected ?string $currency = null;
     protected ?string $lastRefundNotification = null;
     protected ?float $refundFee = null;
@@ -70,12 +70,12 @@ public function setStatus(?string $status): void
         $this->status = $status;
     }
 
-    public function getAmount(): ?int
+    public function getAmount(): ?float
     {
         return $this->amount;
     }
 
-    public function setAmount(?int $amount): void
+    public function setAmount(?float $amount): void
     {
         $this->amount = $amount;
     }
diff --git a/test/unit/BitPaySDK/Model/CurrencyTest.php b/test/unit/BitPaySDK/Model/CurrencyTest.php
index df337d04..2f553cdc 100644
--- a/test/unit/BitPaySDK/Model/CurrencyTest.php
+++ b/test/unit/BitPaySDK/Model/CurrencyTest.php
@@ -132,6 +132,14 @@ public function testGetDecimals()
         self::assertEquals($expected, $currency->getDecimals());
     }
 
+    public function testModifyChain(): void
+    {
+        $testedClass = $this->createClassObject();
+        $expected = 'someValue';
+        $testedClass->setChain($expected);
+
+        self::assertEquals($expected, $testedClass->getChain());
+    }
 
     private function createClassObject(): Currency
     {
diff --git a/test/unit/BitPaySDK/Model/Invoice/BuyerFieldsTest.php b/test/unit/BitPaySDK/Model/Invoice/BuyerFieldsTest.php
index cfd3952a..6c21c7ec 100644
--- a/test/unit/BitPaySDK/Model/Invoice/BuyerFieldsTest.php
+++ b/test/unit/BitPaySDK/Model/Invoice/BuyerFieldsTest.php
@@ -99,7 +99,6 @@ public function testManipulateBuyerZip(): void
         self::assertEquals($expected, $testedClass->getBuyerZip());
     }
 
-
     private function getTestedClass(): BuyerFields
     {
         return new BuyerFields();
diff --git a/test/unit/BitPaySDK/Model/Invoice/InvoiceWebhookTest.php b/test/unit/BitPaySDK/Model/Invoice/InvoiceWebhookTest.php
new file mode 100644
index 00000000..e7f8ef2e
--- /dev/null
+++ b/test/unit/BitPaySDK/Model/Invoice/InvoiceWebhookTest.php
@@ -0,0 +1,145 @@
+<?php
+
+declare(strict_types=1);
+
+namespace BitPaySDK\Test\Model\Invoice;
+
+use BitPaySDK\Model\Invoice\BuyerFields;
+use BitPaySDK\Model\Invoice\InvoiceWebhook;
+use PHPUnit\Framework\TestCase;
+
+class InvoiceWebhookTest extends TestCase
+{
+    public function testManipulateAmountPaid(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 12.23;
+        $testedClass->setAmountPaid($expected);
+        self::assertEquals($expected, $testedClass->getamountPaid());
+    }
+
+    public function testManipulateBuyerFields(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = new BuyerFields();
+        $testedClass->setBuyerFields($expected);
+        self::assertEquals($expected, $testedClass->getbuyerFields());
+    }
+
+    public function testManipulateCurrency(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setCurrency($expected);
+        self::assertEquals($expected, $testedClass->getCurrency());
+    }
+
+    public function testManipulateCurrencyTime(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setCurrencyTime($expected);
+        self::assertEquals($expected, $testedClass->getCurrencyTime());
+    }
+
+    public function testManipulateExceptionStatus(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setExceptionStatus($expected);
+        self::assertEquals($expected, $testedClass->getExceptionStatus());
+    }
+
+    public function testManipulateExchangeRates(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = [];
+        $testedClass->setExchangeRates($expected);
+        self::assertEquals($expected, $testedClass->getExchangeRates());
+    }
+
+    public function testManipulateId(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setid($expected);
+        self::assertEquals($expected, $testedClass->getId());
+    }
+
+    public function testManipulateInvoiceTime(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setInvoiceTime($expected);
+        self::assertEquals($expected, $testedClass->getInvoiceTime());
+    }
+
+    public function testManipulateOrderId(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setOrderId($expected);
+        self::assertEquals($expected, $testedClass->getOrderId());
+    }
+
+    public function testManipulate_paymentSubtotals(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = [];
+        $testedClass->setPaymentSubtotals($expected);
+        self::assertEquals($expected, $testedClass->getPaymentSubtotals());
+    }
+
+    public function testManipulatePaymentTotals(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = [];
+        $testedClass->setPaymentTotals($expected);
+        self::assertEquals($expected, $testedClass->getPaymentTotals());
+    }
+
+    public function testManipulatePosData(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setPosData($expected);
+        self::assertEquals($expected, $testedClass->getPosData());
+    }
+
+    public function testManipulatePrice(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 123.78;
+        $testedClass->setPrice($expected);
+        self::assertEquals($expected, $testedClass->getPrice());
+    }
+
+    public function testManipulateStatus(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setStatus($expected);
+        self::assertEquals($expected, $testedClass->getStatus());
+    }
+
+    public function testManipulateTransactionCurrency(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setTransactionCurrency($expected);
+        self::assertEquals($expected, $testedClass->getTransactionCurrency());
+    }
+
+    public function testManipulateUrl(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setUrl($expected);
+        self::assertEquals($expected, $testedClass->getUrl());
+    }
+
+    private function getTestedClass(): InvoiceWebhook
+    {
+        return new InvoiceWebhook();
+    }
+}
diff --git a/test/unit/BitPaySDK/Model/Ledger/BuyerTest.php b/test/unit/BitPaySDK/Model/Ledger/BuyerTest.php
index b0f1c330..d34a7334 100644
--- a/test/unit/BitPaySDK/Model/Ledger/BuyerTest.php
+++ b/test/unit/BitPaySDK/Model/Ledger/BuyerTest.php
@@ -7,13 +7,13 @@
 
 class BuyerTest extends TestCase
 {
-    public function testInstanceOf()
+    public function testInstanceOf(): void
     {
         $buyer = $this->createClassObject();
         self::assertInstanceOf(Buyer::class, $buyer);
     }
 
-    public function testGetName()
+    public function testModifyBuyerName(): void
     {
         $expectedName = 'Test Name';
 
@@ -22,7 +22,7 @@ public function testGetName()
         self::assertEquals($expectedName, $buyer->getBuyerName());
     }
 
-    public function testGetAddress1()
+    public function testModifyBuyerAddress1(): void
     {
         $expectedAddress1 = 'Address 1';
 
@@ -31,7 +31,7 @@ public function testGetAddress1()
         self::assertEquals($expectedAddress1, $buyer->getBuyerAddress1());
     }
 
-    public function testGetAddress2()
+    public function testModifyBuyerAddress2(): void
     {
         $expectedAddress2 = 'Address 2';
 
@@ -40,7 +40,7 @@ public function testGetAddress2()
         self::assertEquals($expectedAddress2, $buyer->getBuyerAddress2());
     }
 
-    public function testGetCity()
+    public function testModifyBuyerCity(): void
     {
         $expectedCity = 'Miami';
 
@@ -49,7 +49,7 @@ public function testGetCity()
         self::assertEquals($expectedCity, $buyer->getBuyerCity());
     }
 
-    public function testGetState()
+    public function testModifyBuyerState(): void
     {
         $expectedState = 'AB';
 
@@ -58,7 +58,7 @@ public function testGetState()
         self::assertEquals($expectedState, $buyer->getBuyerState());
     }
 
-    public function testGetZip()
+    public function testModifyBuyerZip(): void
     {
         $expectedZip = '12345';
 
@@ -67,7 +67,7 @@ public function testGetZip()
         self::assertEquals($expectedZip, $buyer->getBuyerZip());
     }
 
-    public function testGetCountry()
+    public function testModifyBuyerCountry(): void
     {
         $expectedCountry = 'Canada';
 
@@ -76,7 +76,7 @@ public function testGetCountry()
         self::assertEquals($expectedCountry, $buyer->getBuyerCountry());
     }
 
-    public function testGetEmail()
+    public function testModifyBuyerEmail(): void
     {
         $expectedEmail = 'test@email.com';
 
@@ -85,7 +85,7 @@ public function testGetEmail()
         self::assertEquals($expectedEmail, $buyer->getBuyerEmail());
     }
 
-    public function testGetPhone()
+    public function testModifyBuyerPhone(): void
     {
         $expectedPhone = '123456789';
 
@@ -94,7 +94,7 @@ public function testGetPhone()
         self::assertEquals($expectedPhone, $buyer->getBuyerPhone());
     }
 
-    public function testGetNotify()
+    public function testModifyBuyerNotify(): void
     {
         $buyer = $this->createClassObject();
         $buyer->setBuyerNotify(true);
@@ -104,7 +104,7 @@ public function testGetNotify()
         self::assertFalse($buyer->getBuyerNotify());
     }
 
-    public function testToArray()
+    public function testToArray(): void
     {
         $buyer = $this->createClassObject();
         $this->setSetters($buyer);
diff --git a/test/unit/BitPaySDK/Model/Payout/PayoutWebhookTest.php b/test/unit/BitPaySDK/Model/Payout/PayoutWebhookTest.php
new file mode 100644
index 00000000..a1ba47fb
--- /dev/null
+++ b/test/unit/BitPaySDK/Model/Payout/PayoutWebhookTest.php
@@ -0,0 +1,160 @@
+<?php
+
+declare(strict_types=1);
+
+namespace BitPaySDK\Test\Model\Payout;
+
+use BitPaySDK\Model\Payout\PayoutWebhook;
+use PHPUnit\Framework\TestCase;
+
+class PayoutWebhookTest extends TestCase
+{
+    public function testModifyCurrency(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setCurrency($expected);
+        
+        self::assertEquals($expected, $testedClass->getCurrency());
+    }
+    
+    public function testModifyEffectiveDate(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setEffectiveDate($expected);
+        
+        self::assertEquals($expected, $testedClass->getEffectiveDate());
+    }
+    
+    public function testModifyEmail(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setEmail($expected);
+        
+        self::assertEquals($expected, $testedClass->getEmail());
+    }
+    
+    public function testModifyExchangeRates(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = [];
+        $testedClass->setExchangeRates($expected);
+        
+        self::assertEquals($expected, $testedClass->getExchangeRates());
+    }
+    
+    public function testModifyId(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setId($expected);
+        
+        self::assertEquals($expected, $testedClass->getId());
+    }
+    
+    public function testModifyLabel(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setLabel($expected);
+        
+        self::assertEquals($expected, $testedClass->getLabel());
+    }
+    
+    public function testModifyLedgerCurrency(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setLedgerCurrency($expected);
+        
+        self::assertEquals($expected, $testedClass->getLedgerCurrency());
+    }
+    
+    public function testModifyNotificationEmail(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setNotificationEmail($expected);
+        
+        self::assertEquals($expected, $testedClass->getNotificationEmail());
+    }
+    
+    public function testModifyNotificationURL(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setNotificationURL($expected);
+        
+        self::assertEquals($expected, $testedClass->getNotificationURL());
+    }
+    
+    public function testModifyPrice(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 12.67;
+        $testedClass->setprice($expected);
+        
+        self::assertEquals($expected, $testedClass->getPrice());
+    }
+    
+    public function testModifyRecipientId(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setRecipientId($expected);
+        
+        self::assertEquals($expected, $testedClass->getRecipientId());
+    }
+    
+    public function testModifyReference(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setReference($expected);
+        
+        self::assertEquals($expected, $testedClass->getReference());
+    }
+    
+    public function testModifyRequestDate(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setRequestDate($expected);
+        
+        self::assertEquals($expected, $testedClass->getRequestDate());
+    }
+    
+    public function testModifyShopperId(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setShopperId($expected);
+        
+        self::assertEquals($expected, $testedClass->getShopperId());
+    }
+    
+    public function testModifyStatus(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setStatus($expected);
+        
+        self::assertEquals($expected, $testedClass->getStatus());
+    }
+    
+    public function testModifyTransactions(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = [];
+        $testedClass->setTransactions($expected);
+        
+        self::assertEquals($expected, $testedClass->getTransactions());
+    }
+
+    private function getTestedClass(): PayoutWebhook
+    {
+        return new PayoutWebhook();
+    }
+}
diff --git a/test/unit/BitPaySDK/Model/Payout/RecipientWebhookTest.php b/test/unit/BitPaySDK/Model/Payout/RecipientWebhookTest.php
new file mode 100644
index 00000000..3f13b8a1
--- /dev/null
+++ b/test/unit/BitPaySDK/Model/Payout/RecipientWebhookTest.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace BitPaySDK\Test\Model\Payout;
+
+use BitPaySDK\Model\Payout\RecipientWebhook;
+use PHPUnit\Framework\TestCase;
+
+class RecipientWebhookTest extends TestCase
+{
+    public function testModifyEmail(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setEmail($expected);
+
+        self::assertEquals($expected, $testedClass->getEmail());
+    }
+
+    public function testModifyId(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setId($expected);
+
+        self::assertEquals($expected, $testedClass->getId());
+    }
+
+    public function testModifyLabel(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setLabel($expected);
+
+        self::assertEquals($expected, $testedClass->getLabel());
+    }
+
+    public function testModifyShopperId(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setShopperId($expected);
+
+        self::assertEquals($expected, $testedClass->getShopperId());
+    }
+
+    public function testModifyStatus(): void
+    {
+        $testedClass = $this->getTestedClass();
+        $expected = 'someValue';
+        $testedClass->setstatus($expected);
+
+        self::assertEquals($expected, $testedClass->getStatus());
+    }
+
+    private function getTestedClass(): RecipientWebhook
+    {
+        return new RecipientWebhook();
+    }
+}
diff --git a/test/unit/BitPaySDK/Model/Wallet/WalletTest.php b/test/unit/BitPaySDK/Model/Wallet/WalletTest.php
index 066d030d..57fbda65 100644
--- a/test/unit/BitPaySDK/Model/Wallet/WalletTest.php
+++ b/test/unit/BitPaySDK/Model/Wallet/WalletTest.php
@@ -9,134 +9,161 @@
 
 class WalletTest extends TestCase
 {
-  public function testInstanceOf()
-  {
-    $wallet = $this->createClassObject();
-    self::assertInstanceOf(Wallet::class, $wallet);
-  }
-
-  public function testGetKey()
-  {
-    $expectedKey = 'abcd123';
-
-    $wallet = $this->createClassObject();
-    $wallet->setKey($expectedKey);
-    self::assertEquals($expectedKey, $wallet->getKey());
-  }
-
-  public function testGetDisplayName()
-  {
-    $expectedDisplayName = 'My Wallet';
-
-    $wallet = $this->createClassObject();
-    $wallet->setDisplayName($expectedDisplayName);
-    self::assertEquals($expectedDisplayName, $wallet->getDisplayName());
-  }
-
-  public function testGetAvatar()
-  {
-    $expectedAvatar = 'image.png';
-
-    $wallet = $this->createClassObject();
-    $wallet->setAvatar($expectedAvatar);
-    self::assertEquals($expectedAvatar, $wallet->getAvatar());
-  }
-
-  public function testGetPayPro()
-  {
-    $wallet = $this->createClassObject();
-    $wallet->setPayPro(true);
-    self::assertTrue($wallet->getPayPro());
-  }
-
-  public function testGetCurrencies()
-  {
-    $currencyQr = new CurrencyQr;
-    $currencyQr->setType('BIP21');
-    $currencyQr->setCollapsed(false);
-
-    $expectedCurrencies = new Currencies();
-    $expectedCurrencies->setCode('BTH');
-    $expectedCurrencies->setP2p(true);
-    $expectedCurrencies->setDappBrowser(true);
-    $expectedCurrencies->setImage('https://bitpay.com/api/images/logo-6fa5404d.svg');
-    $expectedCurrencies->setPayPro(true);
-    $expectedCurrencies->setQr($currencyQr);
-    $expectedCurrencies->setWithdrawalFee('1.23');
-    $expectedCurrencies->setWalletConnect(true);
-    
-    $wallet = $this->createClassObject();
-    $wallet->setCurrencies($expectedCurrencies);
-    self::assertEquals($expectedCurrencies, $wallet->getCurrencies());
-  }
-
-  public function testGetImage()
-  {
-    $expectedImage = 'https://bitpay.com/api/images/logo-6fa5404d.svg';
-
-    $wallet = $this->createClassObject();
-    $wallet->setImage($expectedImage);
-    self::assertEquals($expectedImage, $wallet->getImage());
-  }
-
-  public function testToArray()
-  {
-    $wallet = $this->createClassObject();
-    $this->objectSetters($wallet);
-    $walletArray = $wallet->toArray();
-
-    self::assertNotNull($walletArray);
-    self::assertIsArray($walletArray);
-
-    self::assertArrayHasKey('key', $walletArray);
-    self::assertArrayHasKey('displayName', $walletArray);
-    self::assertArrayHasKey('avatar', $walletArray);
-    self::assertArrayHasKey('paypro', $walletArray);
-    self::assertArrayHasKey('currencies', $walletArray);
-    self::assertArrayHasKey('image', $walletArray);
-
-    self::assertEquals('abcd123', $walletArray['key']);
-    self::assertEquals('My Wallet', $walletArray['displayName']);
-    self::assertEquals('image.png', $walletArray['avatar']);
-    self::assertTrue($walletArray['paypro']);
-    self::assertEquals('BTH', $walletArray['currencies']['code']);
-    self::assertTrue($walletArray['currencies']['p2p']);
-    self::assertTrue($walletArray['currencies']['dappBrowser']);
-    self::assertEquals('https://bitpay.com/api/images/logo-6fa5404d.svg', $walletArray['currencies']['image']);
-    self::assertTrue($walletArray['currencies']['paypro']);
-    self::assertEquals('BIP21', $walletArray['currencies']['qr']['type']);
-    self::assertFalse($walletArray['currencies']['qr']['collapsed']);
-    self::assertEquals('1.23', $walletArray['currencies']['withdrawalFee']);
-    self::assertTrue($walletArray['currencies']['walletConnect']);
-    self::assertEquals('https://bitpay.com/api/images/logo-6fa5404d.svg', $walletArray['image']);
-  }
-
-  private function createClassObject(): Wallet
-  {
-    return new Wallet();
-  }
-
-  private function objectSetters(Wallet $wallet): void
-  {
-    $currencyQr = new CurrencyQr;
-    $currencyQr->setType('BIP21');
-    $currencyQr->setCollapsed(false);
-
-    $currencies = new Currencies();
-    $currencies->setCode('BTH');
-    $currencies->setP2p(true);
-    $currencies->setDappBrowser(true);
-    $currencies->setImage('https://bitpay.com/api/images/logo-6fa5404d.svg');
-    $currencies->setPayPro(true);
-    $currencies->setQr($currencyQr);
-    $currencies->setWithdrawalFee('1.23');
-    $currencies->setWalletConnect(true);
-
-    $wallet->setKey('abcd123');
-    $wallet->setDisplayName('My Wallet');
-    $wallet->setAvatar('image.png');
-    $wallet->setPayPro(true);
-    $wallet->setCurrencies($currencies);
-    $wallet->setImage('https://bitpay.com/api/images/logo-6fa5404d.svg');
-  }
+    public function testInstanceOf()
+    {
+        $wallet = $this->createClassObject();
+        self::assertInstanceOf(Wallet::class, $wallet);
+    }
+
+    public function testGetKey()
+    {
+        $expectedKey = 'abcd123';
+
+        $wallet = $this->createClassObject();
+        $wallet->setKey($expectedKey);
+        self::assertEquals($expectedKey, $wallet->getKey());
+    }
+
+    public function testGetDisplayName()
+    {
+        $expectedDisplayName = 'My Wallet';
+
+        $wallet = $this->createClassObject();
+        $wallet->setDisplayName($expectedDisplayName);
+        self::assertEquals($expectedDisplayName, $wallet->getDisplayName());
+    }
+
+    public function testGetAvatar()
+    {
+        $expectedAvatar = 'image.png';
+
+        $wallet = $this->createClassObject();
+        $wallet->setAvatar($expectedAvatar);
+        self::assertEquals($expectedAvatar, $wallet->getAvatar());
+    }
+
+    public function testGetPayPro()
+    {
+        $wallet = $this->createClassObject();
+        $wallet->setPayPro(true);
+        self::assertTrue($wallet->getPayPro());
+    }
+
+    public function testGetCurrencies()
+    {
+        $currencyQr = new CurrencyQr;
+        $currencyQr->setType('BIP21');
+        $currencyQr->setCollapsed(false);
+
+        $expectedCurrencies = new Currencies();
+        $expectedCurrencies->setCode('BTH');
+        $expectedCurrencies->setP2p(true);
+        $expectedCurrencies->setDappBrowser(true);
+        $expectedCurrencies->setImage('https://bitpay.com/api/images/logo-6fa5404d.svg');
+        $expectedCurrencies->setPayPro(true);
+        $expectedCurrencies->setQr($currencyQr);
+        $expectedCurrencies->setWithdrawalFee('1.23');
+        $expectedCurrencies->setWalletConnect(true);
+
+        $wallet = $this->createClassObject();
+        $wallet->setCurrencies($expectedCurrencies);
+        self::assertEquals($expectedCurrencies, $wallet->getCurrencies());
+    }
+
+    public function testGetImage()
+    {
+        $expectedImage = 'https://bitpay.com/api/images/logo-6fa5404d.svg';
+
+        $wallet = $this->createClassObject();
+        $wallet->setImage($expectedImage);
+        self::assertEquals($expectedImage, $wallet->getImage());
+    }
+
+    public function modifyUniCode(): void
+    {
+        $testedClass = $this->createClassObject();
+        $expected = 'someValue';
+        $testedClass->setUniCode($expected);
+
+        self::assertEquals($expected, $testedClass->getUniCode());
+    }
+
+    public function modifyOffChainMode(): void
+    {
+        $testedClass = $this->createClassObject();
+        $expected = 'someValue';
+        $testedClass->setOffChainMode($expected);
+
+        self::assertEquals($expected, $testedClass->getOffChainMode());
+    }
+
+    public function modifyInvoiceDefault(): void
+    {
+        $testedClass = $this->createClassObject();
+        $expected = 'someValue';
+        $testedClass->setInvoiceDefault($expected);
+
+        self::assertEquals($expected, $testedClass->getInvoiceDefault());
+    }
+
+    public function testToArray()
+    {
+        $wallet = $this->createClassObject();
+        $this->objectSetters($wallet);
+        $walletArray = $wallet->toArray();
+
+        self::assertNotNull($walletArray);
+        self::assertIsArray($walletArray);
+
+        self::assertArrayHasKey('key', $walletArray);
+        self::assertArrayHasKey('displayName', $walletArray);
+        self::assertArrayHasKey('avatar', $walletArray);
+        self::assertArrayHasKey('paypro', $walletArray);
+        self::assertArrayHasKey('currencies', $walletArray);
+        self::assertArrayHasKey('image', $walletArray);
+
+        self::assertEquals('abcd123', $walletArray['key']);
+        self::assertEquals('My Wallet', $walletArray['displayName']);
+        self::assertEquals('image.png', $walletArray['avatar']);
+        self::assertTrue($walletArray['paypro']);
+        self::assertEquals('BTH', $walletArray['currencies']['code']);
+        self::assertTrue($walletArray['currencies']['p2p']);
+        self::assertTrue($walletArray['currencies']['dappBrowser']);
+        self::assertEquals('https://bitpay.com/api/images/logo-6fa5404d.svg', $walletArray['currencies']['image']);
+        self::assertTrue($walletArray['currencies']['paypro']);
+        self::assertEquals('BIP21', $walletArray['currencies']['qr']['type']);
+        self::assertFalse($walletArray['currencies']['qr']['collapsed']);
+        self::assertEquals('1.23', $walletArray['currencies']['withdrawalFee']);
+        self::assertTrue($walletArray['currencies']['walletConnect']);
+        self::assertEquals('https://bitpay.com/api/images/logo-6fa5404d.svg', $walletArray['image']);
+    }
+
+    private function createClassObject(): Wallet
+    {
+        return new Wallet();
+    }
+
+    private function objectSetters(Wallet $wallet): void
+    {
+        $currencyQr = new CurrencyQr;
+        $currencyQr->setType('BIP21');
+        $currencyQr->setCollapsed(false);
+
+        $currencies = new Currencies();
+        $currencies->setCode('BTH');
+        $currencies->setP2p(true);
+        $currencies->setDappBrowser(true);
+        $currencies->setImage('https://bitpay.com/api/images/logo-6fa5404d.svg');
+        $currencies->setPayPro(true);
+        $currencies->setQr($currencyQr);
+        $currencies->setWithdrawalFee('1.23');
+        $currencies->setWalletConnect(true);
+
+        $wallet->setKey('abcd123');
+        $wallet->setDisplayName('My Wallet');
+        $wallet->setAvatar('image.png');
+        $wallet->setPayPro(true);
+        $wallet->setCurrencies($currencies);
+        $wallet->setImage('https://bitpay.com/api/images/logo-6fa5404d.svg');
+    }
 }
\ No newline at end of file