Tests and package name updated

Runtime/Models/FonepayError.cs

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+using System;
+
+namespace Darkmatter.Fonepay
+{
+    public sealed class FonepayError : Exception
+    {
+        public int ErrorCode { get; }
+        public string Docs { get; }
+
+        public FonepayError(int errorCode, string message, string docs)
+            : base(message)
+        {
+            ErrorCode = errorCode;
+            Docs = docs ?? throw new ArgumentNullException(nameof(docs));
+        }
+
+        public override string ToString()
+        {
+            return $"{base.ToString()} (ErrorCode: {ErrorCode}, Docs: {Docs})";
+        }
+    }
+}

Runtime/Models/FonepayError.cs.meta

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+fileFormatVersion: 2
+guid: 46adc238f3552442bad6f68d9b2ee68a

Runtime/Models/QrRequest.cs

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+using System;
+
+namespace Darkmatter.Fonepay
+{
+    /// <summary>
+    /// User-facing QR request. Credentials (merchantCode/username/password) and the
+    /// HMAC dataValidation are injected by FonepayApiClient at send time.
+    /// </summary>
+    [Serializable]
+    public struct QrRequest
+    {
+        public float amount;
+        public string remarks1;
+        public string remarks2;
+    }
+
+    [Serializable]
+    internal struct QrRequestPayload
+    {
+        public float amount;
+        public string prn;
+        public string remarks1;
+        public string remarks2;
+        public string merchantCode;
+        public string dataValidation;
+        public string username;
+        public string password;
+    }
+}

Runtime/Models/QrRequest.cs.meta

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+fileFormatVersion: 2
+guid: 255c2e13d0ed54987904cd65a5349d29

Runtime/Models/QrResponse.cs

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+using System;
+using UnityEngine;
+
+namespace Darkmatter.Fonepay
+{
+    [Serializable]
+    public struct QrResult
+    {
+        public string message;
+        public Texture2D qrCode;
+        public string status;
+        public int statusCode;
+        public bool success;
+        public string thirdpartyQrWebSocketUrl;
+        public string qrMessage;
+    }
+
+
+    [Serializable]
+    internal struct QrResponse
+    {
+        public string message;
+        public string qrMessage;
+        public string status;
+        public int statusCode;
+        public bool success;
+        public string thirdpartyQrWebSocketUrl;
+    }
+}

Runtime/Models/QrResponse.cs.meta

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+fileFormatVersion: 2
+guid: 405247a27c684f08ab11d6ea33d250c0
+timeCreated: 1778138521

Runtime/Models/TaxRefundRequest.cs

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+using System;
+
+namespace Darkmatter.Fonepay
+{
+    /// <summary>
+    /// User-facing tax refund request. Credentials and HMAC dataValidation are
+    /// injected by FonepayApiClient at send time.
+    /// </summary>
+    [Serializable]
+    public struct TaxRefundRequest
+    {
+        public string fonepayTraceId;
+        public string merchantPRN;
+        public string invoiceNumber;
+        public DateTime invoiceDate;
+        public float transactionAmount;
+    }
+
+    [Serializable]
+    internal struct TaxRefundRequestPayload
+    {
+        public string fonepayTraceId;
+        public string merchantPRN;
+        public string invoiceNumber;
+        public string invoiceDate;
+        public float transactionAmount;
+        public string merchantCode;
+        public string dataValidation;
+        public string username;
+        public string password;
+    }
+}

Runtime/Models/TaxRefundRequest.cs.meta

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+fileFormatVersion: 2
+guid: 328f1e46b5a941bbbf5c0e8294fc9c34
+timeCreated: 1778140313

Runtime/Models/TaxRefundResponse.cs

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+namespace Darkmatter.Fonepay
+{
+    public struct TaxRefundResponse
+    {
+        public string fonepayTraceId;
+        public string message;
+        public bool success;
+    }
+}

Runtime/Models/TaxRefundResponse.cs.meta

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+fileFormatVersion: 2
+guid: ccdcd51d0dc843eabdb25aa3312bd91a
+timeCreated: 1778140771

Runtime/Models/Websocket.meta

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+fileFormatVersion: 2
+guid: 0b231c6bbbdf4b519ac94e2d745b84c4
+timeCreated: 1778143935

Runtime/Models/Websocket/PaymentOutcome.cs

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+namespace Darkmatter.Fonepay
+{
+    public enum PaymentOutcome
+    {
+        Failed,
+        Complete,
+        CancelledByUser
+    }
+}

Runtime/Models/Websocket/PaymentOutcome.cs.meta

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+fileFormatVersion: 2
+guid: b18f877972094e3993a95d2ae363f12a

Runtime/Models/Websocket/QRPaymentStatus.cs

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+using System;
+
+namespace Darkmatter.Fonepay
+{
+    [Serializable]
+    public struct QRPaymentStatus
+    {
+        public string remarks1;
+        public string remarks2;
+        public string transactionDate;
+        public string productNumber;
+        public float amount;
+        public string message;
+        public bool success;
+        public string commissionType;
+        public float commissionAmount;
+        public float totalCalculatedAmount;
+        public bool paymentSuccess;
+        
+        public PaymentOutcome Outcome => (success, paymentSuccess) switch
+        {
+            (true, true) => PaymentOutcome.Complete,
+            (true, false) => PaymentOutcome.CancelledByUser,
+            (false, _) => PaymentOutcome.Failed,
+        };
+    }
+}

Runtime/Models/Websocket/QRPaymentStatus.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 5ee6badc7f924737865c86113de9d2ac
+timeCreated: 1778144200

Runtime/Models/Websocket/QRVerificationStatus.cs

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+using System;
+
+namespace Darkmatter.Fonepay
+{
+    [Serializable]
+    public struct QRVerificationStatus
+    {
+        public bool success;
+        public string message;
+        public bool qrVerified;
+    }
+}

Runtime/Models/Websocket/QRVerificationStatus.cs.meta

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+fileFormatVersion: 2
+guid: f26424156fc543c487793821806dd8c7
+timeCreated: 1778144700

Runtime/Models/Websocket/TransactionStatus.cs

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+using System;
+
+namespace Darkmatter.Fonepay
+{
+    [Serializable]
+    public struct TransactionStatus
+    {
+    }
+}

Runtime/Models/Websocket/TransactionStatus.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: d83df4253afa4d4b968ad3b8c88da203
+timeCreated: 1778143652

Runtime/Models/Websocket/WebsocketMessage.cs

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+using System;
+using UnityEngine;
+
+namespace Darkmatter.Fonepay
+{
+    [Serializable]
+    public struct WebsocketMessage<T>
+    {
+        public string merchantId;
+        public string deviceId;
+        public string transactionStatus;
+        public T Status => JsonUtility.FromJson<T>(transactionStatus);
+    }
+}

Runtime/Models/Websocket/WebsocketMessage.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: f74983b79502486a891686f80f33737c
+timeCreated: 1778143616