Updated CryptoExchange.Net to version 13.2.3

Updated WebSocket duplicate subscription handling
Fixed incorrect status keeping of WebSocket subscriptions which don't expect a response

.gitignore

@@ -287,3 +287,4 @@ __pycache__/
 *.odx.cs
 *.xsd.cs
 CryptoExchange.Net/CryptoExchange.Net.xml
+CryptoExchange.Net.Web3/CryptoExchange.Net.Web3.xml

CryptoExchange.Net.Web3/CeAbiEncoder.cs

@@ -0,0 +1,149 @@
+using System.Numerics;
+using System.Text;
+
+namespace CryptoExchange.Net.Web3
+{
+    /// <summary>
+    /// ABI encoding
+    /// </summary>
+    public static class CeAbiEncoder
+    {
+        /// <summary>
+        /// ABI encode string as Sha3Keccack hashed byte value
+        /// </summary>
+        public static byte[] AbiValueEncodeString(string value)
+        {
+            var abiValueEncoded = CeSha3Keccack.CalculateHash(Encoding.UTF8.GetBytes(value));
+            return abiValueEncoded;
+        }
+
+        /// <summary>
+        /// ABI encode bool value as uint256 with 1 for true and 0 for false, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeBool(bool value)
+            => AbiValueEncodeInt((byte)(value ? 1 : 0));
+
+        /// <summary>
+        /// ABI encode byte value as uint256, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeInt(byte value)
+            => AbiValueEncodeBigInteger(false, new BigInteger(value));
+
+        /// <summary>
+        /// ABI encode short value as int256, as per ABI specification  
+        /// </summary>
+        public static byte[] AbiValueEncodeInt(short value)
+            => AbiValueEncodeBigInteger(true, new BigInteger(value));
+
+        /// <summary>
+        /// ABI encode int value as int256, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeInt(int value)
+            => AbiValueEncodeBigInteger(true, new BigInteger(value));
+
+        /// <summary>
+        /// ABI encode long value as int256, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeInt(long value)
+            => AbiValueEncodeBigInteger(true, new BigInteger(value));
+
+        /// <summary>
+        /// ABI encode ushort value as uint256, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeInt(ushort value)
+            => AbiValueEncodeBigInteger(false, new BigInteger(value));
+
+        /// <summary>
+        /// ABI encode uint value as uint256, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeInt(uint value)
+            => AbiValueEncodeBigInteger(false, new BigInteger(value));
+
+        /// <summary>
+        /// ABI encode ulong value as uint256, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeInt(ulong value)
+            => AbiValueEncodeBigInteger(false, new BigInteger(value));
+
+        /// <summary>
+        /// ABI encode big integer value as int256 or uint256, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeBigInteger(
+            bool signed,
+            BigInteger value,
+            int bitWidth = 256)
+        {
+            if (bitWidth < 8 || bitWidth > 256 || bitWidth % 8 != 0)
+                throw new ArgumentOutOfRangeException(nameof(bitWidth));
+
+            var min = signed
+                ? -(BigInteger.One << (bitWidth - 1))
+                : BigInteger.Zero;
+
+            var max = signed
+                ? (BigInteger.One << (bitWidth - 1)) - 1
+                : (BigInteger.One << bitWidth) - 1;
+
+            if (value < min || value > max)
+                throw new ArgumentOutOfRangeException(nameof(value), $"Value does not fit {(signed ? "int" : "uint")}{bitWidth}.");
+
+            var result = new byte[32];
+
+            // Sign-extend negative values.
+            if (value.Sign < 0)
+            {
+                for (var i = 0; i < result.Length; i++)
+                    result[i] = 0xff;
+            }
+
+            // BigInteger.ToByteArray() always returns little-endian
+            // two's-complement bytes, regardless of platform endianness.
+            var bytes = value.ToByteArray();
+
+            // A valid uint256 may have a 33rd, zero-valued sign byte.
+            for (var i = 0; i < Math.Min(bytes.Length, result.Length); i++)
+                result[result.Length - 1 - i] = bytes[i];
+
+            return result;
+        }
+
+        /// <summary>
+        /// ABI encode address value as uint256, as per ABI specification
+        /// </summary>
+        public static byte[] AbiValueEncodeAddress(string value)
+        {
+            var result = new byte[32];
+            var h = value.HexStringToBytes();
+            h.CopyTo(result, result.Length - h.Length);
+            return result;
+        }
+
+        /// <summary>
+        /// ABI encode hex string value as bytes32, as per ABI specification. The hex string is expected to be a 0x prefixed string, and the resulting bytes will be right aligned in the 32 bytes result, with leading zeros if the hex string is shorter than 32 bytes. If the hex string is longer than 32 bytes, an exception will be thrown.
+        /// </summary>
+        public static byte[] AbiValueEncodeHexBytes(int length, string value)
+            => AbiValueEncodeBytes(length, value.HexStringToBytes());
+
+        /// <summary>
+        /// ABI encode byte array value as bytes32, as per ABI specification. <br />
+        /// The resulting bytes will be left aligned in the 32 bytes result, with trailing zeros if the byte array is shorter than 32 bytes. <br />
+        /// If the byte array is longer than 32 bytes, an exception will be thrown.
+        /// </summary>
+        public static byte[] AbiValueEncodeBytes(int length, byte[] value)
+        {
+            if (length < 1 || length > 32)
+                throw new ArgumentOutOfRangeException(nameof(length));
+
+            if (value == null)
+                throw new ArgumentNullException(nameof(value));
+
+            if (value.Length > length)
+                throw new ArgumentException($"Value exceeds bytes{length}.", nameof(value));
+
+            // Fixed bytes are left-aligned, with trailing zero padding.
+            var result = new byte[32];
+            Array.Copy(value, 0, result, 0, value.Length);
+            return result;
+        }
+    }
+}

CryptoExchange.Net.Web3/CeEip712TypedDataEncoder.cs

@@ -0,0 +1,342 @@
+using System.Collections;
+using System.Globalization;
+using System.Numerics;
+using System.Text;
+using System.Text.RegularExpressions;
+
+namespace CryptoExchange.Net.Web3
+{
+    /// <summary>
+    /// EIP712 Typed Data Encoder
+    /// </summary>
+    public static class CeEip712TypedDataEncoder
+    {
+        /// <summary>
+        /// Encode EIP712 typed data according to the specification, with the provided primary type, domain fields and message fields.
+        /// The resulting byte array is the 0x19 0x01 prefix followed by the hash of the domain and the hash of the message, which can be signed with ECDsa secp256k1 to produce a signature that can be verified on chain with EIP712.
+        /// Note that this implementation does not support all possible EIP712 types, but it should cover most common use cases
+        /// </summary>
+        public static byte[] EncodeEip712(
+            string primaryType,
+            IEnumerable<(string Name, string Type, object Value)> domainFields,
+            IEnumerable<(string Name, string Type, object Value)> messageFields)
+        {
+            var data = new CeTypedDataRaw()
+            {
+                PrimaryType = primaryType,
+                DomainRawValues = domainFields.Select(x => new CeMemberValue
+                {
+                    TypeName = x.Type,
+                    Value = x.Value,
+                }).ToArray(),
+
+                Message = messageFields.Select(x => new CeMemberValue
+                {
+                    TypeName = x.Type,
+                    Value = x.Value,
+                }).ToArray(),
+                Types = new Dictionary<string, CeMemberDescription[]>
+                {
+                    {
+                        "EIP712Domain",
+                        domainFields.Select(x => new CeMemberDescription
+                        {
+                            Name = x.Name,
+                            Type = x.Type
+                        }).ToArray()
+                    },
+                    {
+                        primaryType,
+                        messageFields.Select(x => new CeMemberDescription
+                        {
+                            Name = x.Name,
+                            Type = x.Type
+                        }).ToArray()
+                    }
+                }
+            };
+
+            return EncodeTypedDataRaw(data);
+        }
+
+        /// <summary>
+        /// Encode EIP712 typed data according to the specification, with the provided primary type, domain fields and message fields.
+        /// The resulting byte array is the 0x19 0x01 prefix followed by the hash of the domain and the hash of the message, which can be signed with ECDsa secp256k1 to produce a signature that can be verified on chain with EIP712.
+        /// Note that this implementation does not support all possible EIP712 types, but it should cover most common use cases
+        /// </summary>
+        public static byte[] EncodeTypedDataRaw(CeTypedDataRaw typedData)
+        {
+            using var memoryStream = new MemoryStream();
+            using var writer = new BinaryWriter(memoryStream);
+
+            // Write 0x19 0x01 prefix
+            writer.Write((byte)0x19);
+            writer.Write((byte)0x01);
+
+            // Write domain
+            writer.Write(HashStruct(typedData.Types, "EIP712Domain", typedData.DomainRawValues));
+
+            // Write message
+            writer.Write(HashStruct(typedData.Types, typedData.PrimaryType, typedData.Message));
+
+            writer.Flush();
+            var result = memoryStream.ToArray();
+            return result;
+
+        }
+
+        private static byte[] HashStruct(IDictionary<string, CeMemberDescription[]> types, string primaryType, IEnumerable<CeMemberValue> message)
+        {
+            var memoryStream = new MemoryStream();
+            var writer = new BinaryWriter(memoryStream);
+
+            // Encode the type header
+            EncodeType(writer, types, primaryType);
+
+            // Encode the data
+            EncodeData(writer, types, message);
+
+            writer.Flush();
+            return CeSha3Keccack.CalculateHash(memoryStream.ToArray());
+
+        }
+
+        private static void EncodeData(BinaryWriter writer, IDictionary<string, CeMemberDescription[]> types, IEnumerable<CeMemberValue> memberValues)
+        {
+            foreach (var memberValue in memberValues)
+            {
+                switch (memberValue.TypeName)
+                {
+                    case var refType when IsReferenceType(refType):
+                        writer.Write(HashStruct(types, memberValue.TypeName, (IEnumerable<CeMemberValue>)memberValue.Value));
+                        break;
+
+                    case "string":
+                        writer.Write(CeAbiEncoder.AbiValueEncodeString((string)memberValue.Value));
+                        break;
+
+                    case "bool":
+                        writer.Write(CeAbiEncoder.AbiValueEncodeBool((bool)memberValue.Value));
+                        break;
+
+                    case "address":
+                        writer.Write(CeAbiEncoder.AbiValueEncodeAddress((string)memberValue.Value));
+                        break;
+
+                    default:
+                        if (memberValue.TypeName.Contains("["))
+                        {
+                            var items = (IList)memberValue.Value;
+                            var itemsMemberValues = new List<CeMemberValue>();
+                            foreach (var item in items)
+                            {
+                                itemsMemberValues.Add(new CeMemberValue()
+                                {
+                                    TypeName = memberValue.TypeName.Substring(0, memberValue.TypeName.LastIndexOf("[")),
+                                    Value = item
+                                });
+                            }
+
+                            var memoryStream = new MemoryStream();
+                            var writerItem = new BinaryWriter(memoryStream);
+
+                            EncodeData(writerItem, types, itemsMemberValues);
+                            writerItem.Flush();
+                            writer.Write(CeSha3Keccack.CalculateHash(memoryStream.ToArray()));
+                        }
+                        else if (memberValue.TypeName.StartsWith("int", StringComparison.Ordinal) ||
+                                 memberValue.TypeName.StartsWith("uint", StringComparison.Ordinal))
+                        {
+                            var signed = memberValue.TypeName[0] != 'u';
+                            var widthText = memberValue.TypeName.Substring(signed ? 3 : 4);
+
+                            if (!int.TryParse( widthText, NumberStyles.None, CultureInfo.InvariantCulture, out var bitWidth))
+                                throw new ArgumentException($"Invalid integer type: {memberValue.TypeName}");
+
+                            var value = memberValue.Value switch
+                            {
+                                BigInteger n => n,
+                                byte n => new BigInteger(n),
+                                sbyte n => new BigInteger(n),
+                                short n => new BigInteger(n),
+                                ushort n => new BigInteger(n),
+                                int n => new BigInteger(n),
+                                uint n => new BigInteger(n),
+                                long n => new BigInteger(n),
+                                ulong n => new BigInteger(n),
+
+                                string text => BigInteger.Parse(text, NumberStyles.Integer, CultureInfo.InvariantCulture),
+
+                                _ => throw new ArgumentException($"Unsupported value type for {memberValue.TypeName}")
+                            };
+
+                            writer.Write(CeAbiEncoder.AbiValueEncodeBigInteger(signed, value, bitWidth));
+                        }
+                        else if (memberValue.TypeName.StartsWith("bytes", StringComparison.Ordinal))
+                        {
+                            if (memberValue.Value is not byte[] value)
+                                throw new ArgumentException($"Value for {memberValue.TypeName} must be byte[].");
+
+                            if (memberValue.TypeName == "bytes")
+                            {
+                                // EIP-712 dynamic bytes: hash the entire contents,
+                                // including empty arrays, without padding first.
+                                writer.Write(CeSha3Keccack.CalculateHash(value));
+                            }
+                            else
+                            {
+                                var lengthText = memberValue.TypeName.Substring(5);
+                                if (!int.TryParse(lengthText, NumberStyles.None, CultureInfo.InvariantCulture, out var length))
+                                    throw new ArgumentException($"Invalid bytes type: {memberValue.TypeName}");
+
+                                writer.Write(CeAbiEncoder.AbiValueEncodeBytes(length, value));
+                            }
+                        }
+                        else
+                        {
+                            throw new ArgumentException($"Unsupported EIP-712 type: {memberValue.TypeName}");
+                        }
+                        break;
+
+                }
+            }
+        }
+
+        private static void EncodeType(BinaryWriter writer, IDictionary<string, CeMemberDescription[]> types, string typeName)
+        {
+            var encodedTypes = EncodeTypes(types, typeName);
+            var encodedPrimaryType = encodedTypes.SingleOrDefault(x => x.Key == typeName);
+            if (encodedPrimaryType.Equals(default(KeyValuePair<string, string>)))
+                throw new Exception($"Type {typeName} not found in types dictionary");
+
+            var fullyEncodedType = string.Concat(encodedTypes.Select(x => x.Value));
+            writer.Write(CeSha3Keccack.CalculateHash(Encoding.UTF8.GetBytes(fullyEncodedType)));
+        }
+
+        private static IList<KeyValuePair<string, string>> EncodeTypes(
+            IDictionary<string, CeMemberDescription[]> types,
+            string currentTypeName)
+        {
+            var visited = new HashSet<string>(StringComparer.Ordinal);
+
+            void Visit(string typeName)
+            {
+                // Prevent duplicate dependencies and recursive traversal loops.
+                if (!visited.Add(typeName))
+                    return;
+
+                if (!types.TryGetValue(typeName, out var members))
+                    throw new ArgumentException($"Type {typeName} not found in types dictionary", nameof(types));
+
+                foreach (var member in members)
+                {
+                    var memberType = member.Type;
+
+                    // Strip all array dimensions to find the underlying type.
+                    var arrayIndex = memberType.IndexOf('[');
+                    if (arrayIndex >= 0)
+                        memberType = memberType.Substring(0, arrayIndex);
+
+                    if (IsReferenceType(memberType))
+                        Visit(memberType);
+                }
+            }
+
+            KeyValuePair<string, string> Encode(string typeName)
+            {
+                var members = types[typeName]
+                    .Select(x => $"{x.Type} {x.Name}");
+
+                return new KeyValuePair<string, string>(
+                    typeName,
+                    $"{typeName}({string.Join(",", members)})");
+            }
+
+            Visit(currentTypeName);
+
+            var result = new List<KeyValuePair<string, string>>
+            {
+                Encode(currentTypeName)
+            };
+
+            result.AddRange(
+                visited
+                    .Where(x => !StringComparer.Ordinal.Equals(x, currentTypeName))
+                    .OrderBy(x => x, StringComparer.Ordinal)
+                    .Select(Encode));
+
+            return result;
+        }
+
+        internal static bool IsReferenceType(string typeName)
+        {
+            if (typeName == "bytes" ||
+                typeName == "string" ||
+                typeName == "bool" ||
+                typeName == "address" ||
+                typeName.Contains("["))
+            {
+                return false;
+            }
+
+            var isPrimitive = Regex.IsMatch(
+                typeName,
+                @"\A(?:bytes[0-9]+|u?int[0-9]+)\z");
+
+            return !isPrimitive;
+        }
+    }
+
+    /// <summary>
+    /// Member description
+    /// </summary>
+    public class CeMemberDescription
+    {
+        /// <summary>
+        /// Name
+        /// </summary>
+        public string Name { get; set; } = string.Empty;
+        /// <summary>
+        /// Type
+        /// </summary>
+        public string Type { get; set; } = string.Empty;
+    }
+
+    /// <summary>
+    /// Member value
+    /// </summary>
+    public class CeMemberValue
+    {
+        /// <summary>
+        /// Type name
+        /// </summary>
+        public string TypeName { get; set; } = string.Empty;
+        /// <summary>
+        /// Value
+        /// </summary>
+        public object Value { get; set; } = string.Empty;
+    }
+
+    /// <summary>
+    /// Typed data raw, used for encoding EIP712 typed data with the provided primary type, domain fields and message fields.
+    /// </summary>
+    public class CeTypedDataRaw
+    {
+        /// <summary>
+        /// Type dictionary
+        /// </summary>
+        public IDictionary<string, CeMemberDescription[]> Types { get; set; } = new Dictionary<string, CeMemberDescription[]>();
+        /// <summary>
+        /// Primary type
+        /// </summary>
+        public string PrimaryType { get; set; } = string.Empty;
+        /// <summary>
+        /// Message values
+        /// </summary>
+        public CeMemberValue[] Message { get; set; } = [];
+        /// <summary>
+        /// Domain values
+        /// </summary>
+        public CeMemberValue[] DomainRawValues { get; set; } = [];
+    }
+}

CryptoExchange.Net.Web3/CeSha3Keccack.cs

@@ -0,0 +1,382 @@
+using System.Diagnostics;
+
+namespace CryptoExchange.Net.Web3
+{
+    /// <summary>
+    /// Sha3 Keccack hashing, as per Ethereum specification, with 256 bit output
+    /// </summary>
+    public class CeSha3Keccack
+    {
+        /// <summary>
+        /// Calculate the Keccack256 hash of the provided data, as per Ethereum specification
+        /// </summary>
+        public static byte[] CalculateHash(byte[] data)
+        {
+            var digest = new CeKeccakDigest256();
+            var output = new byte[digest.GetDigestSize()];
+            digest.BlockUpdate(data, data.Length);
+            digest.DoFinal(output, 0);
+            return output;
+        }
+    }
+
+    internal class CeKeccakDigest256
+    {
+        private static readonly ulong[] _keccakRoundConstants = KeccakInitializeRoundConstants();
+        private static readonly int[] _keccakRhoOffsets = KeccakInitializeRhoOffsets();
+
+        private readonly int _rate;
+        private const int _stateLength = 1600 / 8;
+        private readonly ulong[] _state = new ulong[_stateLength / 8];
+        private readonly byte[] _dataQueue = new byte[1536 / 8];
+        private int _bitsInQueue;
+        private int _fixedOutputLength;
+        private bool _squeezing;
+        private int _bitsAvailableForSqueezing;
+
+        public CeKeccakDigest256()
+        {
+            _rate = 1600 - (256 << 1);
+            _bitsInQueue = 0;
+            _squeezing = false;
+            _bitsAvailableForSqueezing = 0;
+            _fixedOutputLength = 1600 - _rate >> 1;
+        }
+
+        internal void BlockUpdate(byte[] data, int length)
+        {
+            int bytesInQueue = _bitsInQueue >> 3;
+            int rateBytes = _rate >> 3;
+
+            int count = 0;
+            while (count < length)
+            {
+                if (bytesInQueue == 0 && count <= length - rateBytes)
+                {
+                    do
+                    {
+                        KeccakAbsorb(data, count);
+                        count += rateBytes;
+                    } while (count <= length - rateBytes);
+                }
+                else
+                {
+                    int partialBlock = Math.Min(rateBytes - bytesInQueue, length - count);
+                    Array.Copy(data, count, _dataQueue, bytesInQueue, partialBlock);
+
+                    bytesInQueue += partialBlock;
+                    count += partialBlock;
+
+                    if (bytesInQueue == rateBytes)
+                    {
+                        KeccakAbsorb(_dataQueue, 0);
+                        bytesInQueue = 0;
+                    }
+                }
+            }
+
+            _bitsInQueue = bytesInQueue << 3;
+        }
+
+        internal void DoFinal(byte[] output, int outOff)
+        {
+            Squeeze(output, outOff, _fixedOutputLength >> 3);
+        }
+
+        internal int GetDigestSize() => _fixedOutputLength >> 3;
+
+        protected void Squeeze(byte[] output, int off, int len)
+        {
+            if (!_squeezing)
+                PadAndSwitchToSqueezingPhase();
+
+            long outputLength = (long)len << 3;
+            long i = 0;
+            while (i < outputLength)
+            {
+                if (_bitsAvailableForSqueezing == 0)
+                {
+                    KeccakPermutation();
+                    KeccakExtract();
+                    _bitsAvailableForSqueezing = _rate;
+                }
+
+                int partialBlock = (int)Math.Min(_bitsAvailableForSqueezing, outputLength - i);
+                Array.Copy(_dataQueue, _rate - _bitsAvailableForSqueezing >> 3, output, off + (int)(i >> 3),
+                    partialBlock >> 3);
+                _bitsAvailableForSqueezing -= partialBlock;
+                i += partialBlock;
+            }
+        }
+
+        private static ulong[] KeccakInitializeRoundConstants()
+        {
+            ulong[] keccakRoundConstants = new ulong[24];
+            byte LFSRState = 0x01;
+
+            for (int i = 0; i < 24; i++)
+            {
+                keccakRoundConstants[i] = 0;
+                for (int j = 0; j < 7; j++)
+                {
+                    int bitPosition = (1 << j) - 1;
+
+                    // LFSR86540
+
+                    bool loBit = (LFSRState & 0x01) != 0;
+                    if (loBit)
+                        keccakRoundConstants[i] ^= 1UL << bitPosition;
+
+                    bool hiBit = (LFSRState & 0x80) != 0;
+                    LFSRState <<= 1;
+                    if (hiBit)
+                        LFSRState ^= 0x71;
+                }
+            }
+
+            return keccakRoundConstants;
+        }
+        private static int[] KeccakInitializeRhoOffsets()
+        {
+            int[] keccakRhoOffsets = new int[25];
+            int x, y, t, newX, newY;
+
+            int rhoOffset = 0;
+            keccakRhoOffsets[0] = rhoOffset;
+            x = 1;
+            y = 0;
+            for (t = 1; t < 25; t++)
+            {
+                rhoOffset = rhoOffset + t & 63;
+                keccakRhoOffsets[x % 5 + 5 * (y % 5)] = rhoOffset;
+                newX = (0 * x + 1 * y) % 5;
+                newY = (2 * x + 3 * y) % 5;
+                x = newX;
+                y = newY;
+            }
+
+            return keccakRhoOffsets;
+        }
+
+        private void KeccakAbsorb(byte[] data, int off)
+        {
+            int count = _rate >> 6;
+            for (int i = 0; i < count; ++i)
+            {
+                _state[i] ^= Pack.LeToUInt64(data, off);
+                off += 8;
+            }
+
+            KeccakPermutation();
+        }
+
+        private void KeccakPermutation()
+        {
+            for (int i = 0; i < 24; i++)
+            {
+                Theta(_state);
+                Rho(_state);
+                Pi(_state);
+                Chi(_state);
+                Iota(_state, i);
+            }
+        }
+        private static ulong LeftRotate(ulong v, int r)
+        {
+            return v << r | v >> -r;
+        }
+
+        private static void Theta(ulong[] A)
+        {
+            ulong C0 = A[0 + 0] ^ A[0 + 5] ^ A[0 + 10] ^ A[0 + 15] ^ A[0 + 20];
+            ulong C1 = A[1 + 0] ^ A[1 + 5] ^ A[1 + 10] ^ A[1 + 15] ^ A[1 + 20];
+            ulong C2 = A[2 + 0] ^ A[2 + 5] ^ A[2 + 10] ^ A[2 + 15] ^ A[2 + 20];
+            ulong C3 = A[3 + 0] ^ A[3 + 5] ^ A[3 + 10] ^ A[3 + 15] ^ A[3 + 20];
+            ulong C4 = A[4 + 0] ^ A[4 + 5] ^ A[4 + 10] ^ A[4 + 15] ^ A[4 + 20];
+
+            ulong dX = LeftRotate(C1, 1) ^ C4;
+
+            A[0] ^= dX;
+            A[5] ^= dX;
+            A[10] ^= dX;
+            A[15] ^= dX;
+            A[20] ^= dX;
+
+            dX = LeftRotate(C2, 1) ^ C0;
+
+            A[1] ^= dX;
+            A[6] ^= dX;
+            A[11] ^= dX;
+            A[16] ^= dX;
+            A[21] ^= dX;
+
+            dX = LeftRotate(C3, 1) ^ C1;
+
+            A[2] ^= dX;
+            A[7] ^= dX;
+            A[12] ^= dX;
+            A[17] ^= dX;
+            A[22] ^= dX;
+
+            dX = LeftRotate(C4, 1) ^ C2;
+
+            A[3] ^= dX;
+            A[8] ^= dX;
+            A[13] ^= dX;
+            A[18] ^= dX;
+            A[23] ^= dX;
+
+            dX = LeftRotate(C0, 1) ^ C3;
+
+            A[4] ^= dX;
+            A[9] ^= dX;
+            A[14] ^= dX;
+            A[19] ^= dX;
+            A[24] ^= dX;
+        }
+
+        private static void Rho(ulong[] A)
+        {
+            // KeccakRhoOffsets[0] == 0
+            for (int x = 1; x < 25; x++)
+            {
+                A[x] = LeftRotate(A[x], _keccakRhoOffsets[x]);
+            }
+        }
+
+        private static void Pi(ulong[] A)
+        {
+            ulong a1 = A[1];
+            A[1] = A[6];
+            A[6] = A[9];
+            A[9] = A[22];
+            A[22] = A[14];
+            A[14] = A[20];
+            A[20] = A[2];
+            A[2] = A[12];
+            A[12] = A[13];
+            A[13] = A[19];
+            A[19] = A[23];
+            A[23] = A[15];
+            A[15] = A[4];
+            A[4] = A[24];
+            A[24] = A[21];
+            A[21] = A[8];
+            A[8] = A[16];
+            A[16] = A[5];
+            A[5] = A[3];
+            A[3] = A[18];
+            A[18] = A[17];
+            A[17] = A[11];
+            A[11] = A[7];
+            A[7] = A[10];
+            A[10] = a1;
+        }
+
+        private static void Chi(ulong[] A)
+        {
+            ulong chiC0, chiC1, chiC2, chiC3, chiC4;
+
+            for (int yBy5 = 0; yBy5 < 25; yBy5 += 5)
+            {
+                chiC0 = A[0 + yBy5] ^ ~A[(0 + 1) % 5 + yBy5] & A[(0 + 2) % 5 + yBy5];
+                chiC1 = A[1 + yBy5] ^ ~A[(1 + 1) % 5 + yBy5] & A[(1 + 2) % 5 + yBy5];
+                chiC2 = A[2 + yBy5] ^ ~A[(2 + 1) % 5 + yBy5] & A[(2 + 2) % 5 + yBy5];
+                chiC3 = A[3 + yBy5] ^ ~A[(3 + 1) % 5 + yBy5] & A[(3 + 2) % 5 + yBy5];
+                chiC4 = A[4 + yBy5] ^ ~A[(4 + 1) % 5 + yBy5] & A[(4 + 2) % 5 + yBy5];
+
+                A[0 + yBy5] = chiC0;
+                A[1 + yBy5] = chiC1;
+                A[2 + yBy5] = chiC2;
+                A[3 + yBy5] = chiC3;
+                A[4 + yBy5] = chiC4;
+            }
+        }
+
+        private static void Iota(ulong[] A, int indexRound)
+        {
+            A[0] ^= _keccakRoundConstants[indexRound];
+        }
+
+        private void PadAndSwitchToSqueezingPhase()
+        {
+            Debug.Assert(_bitsInQueue < _rate);
+
+            _dataQueue[_bitsInQueue >> 3] |= (byte)(1U << (_bitsInQueue & 7));
+
+            if (++_bitsInQueue == _rate)
+            {
+                KeccakAbsorb(_dataQueue, 0);
+                _bitsInQueue = 0;
+            }
+
+            {
+                int full = _bitsInQueue >> 6, partial = _bitsInQueue & 63;
+                int off = 0;
+                for (int i = 0; i < full; ++i)
+                {
+                    _state[i] ^= Pack.LeToUInt64(_dataQueue, off);
+                    off += 8;
+                }
+
+                if (partial > 0)
+                {
+                    ulong mask = (1UL << partial) - 1UL;
+                    _state[full] ^= Pack.LeToUInt64(_dataQueue, off) & mask;
+                }
+
+                _state[_rate - 1 >> 6] ^= 1UL << 63;
+            }
+
+            KeccakPermutation();
+            KeccakExtract();
+            _bitsAvailableForSqueezing = _rate;
+
+            _bitsInQueue = 0;
+            _squeezing = true;
+        }
+        private void KeccakExtract()
+        {
+            Pack.UInt64ToLe(_state, 0, _rate >> 6, _dataQueue, 0);
+        }
+
+        static class Pack
+        {
+            internal static ulong LeToUInt64(byte[] bs, int off)
+            {
+                uint lo = LeToUInt32(bs, off);
+                uint hi = LeToUInt32(bs, off + 4);
+                return (ulong)hi << 32 | lo;
+            }
+            internal static uint LeToUInt32(byte[] bs, int off)
+            {
+                return bs[off]
+                       | (uint)bs[off + 1] << 8
+                       | (uint)bs[off + 2] << 16
+                       | (uint)bs[off + 3] << 24;
+            }
+
+            internal static void UInt64ToLe(ulong[] ns, int nsOff, int nsLen, byte[] bs, int bsOff)
+            {
+                for (int i = 0; i < nsLen; ++i)
+                {
+                    UInt64ToLe(ns[nsOff + i], bs, bsOff);
+                    bsOff += 8;
+                }
+            }
+            internal static void UInt64ToLe(ulong n, byte[] bs, int off)
+            {
+                UInt32ToLe((uint)n, bs, off);
+                UInt32ToLe((uint)(n >> 32), bs, off + 4);
+            }
+
+            internal static void UInt32ToLe(uint n, byte[] bs, int off)
+            {
+                bs[off] = (byte)n;
+                bs[off + 1] = (byte)(n >> 8);
+                bs[off + 2] = (byte)(n >> 16);
+                bs[off + 3] = (byte)(n >> 24);
+            }
+        }
+    }
+}

CryptoExchange.Net.Web3/CryptoExchange.Net.Web3.csproj

@@ -0,0 +1,51 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFrameworks>netstandard2.0;netstandard2.1;net8.0;net9.0;net10.0</TargetFrameworks>
+  </PropertyGroup>
+  <PropertyGroup>
+    <PackageId>CryptoExchange.Net.Web3</PackageId>
+    <Authors>JKorf</Authors>
+    <Description>CryptoExchange.Net.Web3 is a helper library adding Web3 utilities to CryptoExchange.Net implementations.</Description>
+    <PackageVersion>13.0.0</PackageVersion>
+    <AssemblyVersion>13.0.0</AssemblyVersion>
+    <FileVersion>13.0.0</FileVersion>
+    <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
+    <RepositoryType>git</RepositoryType>
+    <RepositoryUrl>https://github.com/JKorf/CryptoExchange.Net.git</RepositoryUrl>
+    <PackageProjectUrl>https://github.com/JKorf/CryptoExchange.Net</PackageProjectUrl>
+    <NeutralLanguage>en</NeutralLanguage>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
+    <PackageIcon>icon.png</PackageIcon>
+    <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+    <PackageReleaseNotes>https://github.com/JKorf/CryptoExchange.Net?tab=readme-ov-file#release-notes</PackageReleaseNotes>
+    <Nullable>enable</Nullable>
+    <LangVersion>latest</LangVersion>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+  <ItemGroup>
+    <None Include="..\CryptoExchange.Net\Icon\icon.png" Pack="true" PackagePath="\" />
+    <None Include="README.md" Pack="true" PackagePath="\" />
+  </ItemGroup>
+  <PropertyGroup Label="AOT" Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net7.0'))">
+    <IsAotCompatible>true</IsAotCompatible>
+  </PropertyGroup>
+  <PropertyGroup Label="Deterministic Build" Condition="'$(Configuration)' == 'Release'">
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <IncludeSymbols>true</IncludeSymbols>
+    <SymbolPackageFormat>snupkg</SymbolPackageFormat>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+  </PropertyGroup>
+  <PropertyGroup>
+    <DocumentationFile>CryptoExchange.Net.Web3.xml</DocumentationFile>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="ConfigureAwaitChecker.Analyzer" Version="5.0.0.1">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="CryptoExchange.Net" Version="13.2.2" />
+    <PackageReference Include="Secp256k1.Net" Version="2.0.0" />
+  </ItemGroup>
+</Project>

CryptoExchange.Net.Web3/EthKey.cs

@@ -0,0 +1,171 @@
+using Secp256k1Net;
+using System.Text.Json.Serialization;
+
+namespace CryptoExchange.Net.Web3
+{
+    /// <summary>
+    /// Eth public/private key pair, used for signing messages and verifying signatures.
+    /// </summary>
+    public class EthKey
+    {
+        private byte[]? _pkBytes;
+
+        /// <summary>
+        /// Private key
+        /// </summary>
+        [JsonIgnore]
+        public string? PrivateKey { get; }
+        /// <summary>
+        /// Public address
+        /// </summary>
+        public string PublicAddress { get; }
+
+        /// <summary>
+        /// Create a new EthKey instance
+        /// </summary>
+        /// <param name="publicAddress">Public address, can not sign messages without private key</param>
+        /// <param name="privateKey">Private key, required for signing messages</param>
+        /// <exception cref="ArgumentException"></exception>
+        public EthKey(string? publicAddress = null, string? privateKey = null)
+        {
+            if (privateKey == null && publicAddress == null)
+            {
+                throw new ArgumentException(
+                    "Either a private key or public address must be provided.");
+            }
+
+            if (privateKey != null)
+            {
+                if (!privateKey.StartsWith("0x") || privateKey.Length != 66)
+                {
+                    throw new ArgumentException(
+                        "Private key must be a valid ETH private key, starting with 0x and 66 characters long.");
+                }
+
+                PrivateKey = privateKey;
+                _pkBytes = HexToBytesString(privateKey);
+            }
+
+            if (publicAddress != null)
+            {
+                if (!publicAddress.StartsWith("0x") || publicAddress.Length != 42)
+                {
+                    throw new ArgumentException(
+                        "Public address must be a valid ETH address, starting with 0x and 42 characters long.");
+                }
+
+                if (privateKey != null && !publicAddress.Equals(GetPublicAddress(privateKey), StringComparison.OrdinalIgnoreCase))
+                {
+                    throw new ArgumentException(
+                        "Private key does not match the public address.");
+                }
+
+                PublicAddress = publicAddress;
+            }
+            else
+            {
+                PublicAddress = GetPublicAddress(privateKey!);
+            }
+        }
+
+        /// <summary>
+        /// Create new Eth credentials with only a public key. This is generally only sufficient for verifying signatures and read operations. <br />
+        /// Request signing will not be possible without a private key.
+        /// </summary>
+        /// <param name="publicAddress">The public wallet address</param>
+        public static EthKey FromPublicAddress(string publicAddress)
+        {
+            return new EthKey(publicAddress, null);
+        }
+
+        /// <summary>
+        /// Create new Eth credentials from a private key. The public key will be derived from the private key. Allows signing of messages.
+        /// </summary>
+        /// <param name="privateKey">The private key for the wallet</param>
+        public static EthKey FromPrivateKey(string privateKey)
+        {
+            return new EthKey(null, privateKey);
+        }
+
+        /// <summary>
+        /// Sign a hash with the private key, returning the signature in rsv format
+        /// </summary>
+        public Dictionary<string, object> SignHashRsv(byte[] request)
+        {
+            if (_pkBytes == null)
+                throw new InvalidOperationException("Private key not provided, cannot sign hash");
+
+            (var signature, var recover) = Secp256k1.SignRecoverable(request, _pkBytes);
+            var hexCompactR = BytesToHexString(new ArraySegment<byte>(signature, 0, 32));
+            var hexCompactS = BytesToHexString(new ArraySegment<byte>(signature, 32, 32));
+            var hexCompactV = recover + 27;
+
+            return new Dictionary<string, object>
+            {
+                { "r", "0x" + hexCompactR },
+                { "s", "0x" + hexCompactS },
+                { "v", hexCompactV },
+            };
+        }
+
+        /// <summary>
+        /// Sign a hash with the private key, returning the signature in signature format
+        /// </summary>
+        public string SignHash(byte[] request)
+        {
+            if (_pkBytes == null)
+                throw new InvalidOperationException("Private key not provided, cannot sign hash");
+
+            (var signature, var recover) = Secp256k1.SignRecoverable(request, _pkBytes);
+            var hexCompactR = BytesToHexString(new ArraySegment<byte>(signature, 0, 32));
+            var hexCompactS = BytesToHexString(new ArraySegment<byte>(signature, 32, 32));
+            var hexCompactV = BytesToHexString([(byte)(recover + 27)]);
+
+            var result = "0x" + hexCompactR.PadLeft(64, '0') +
+                   hexCompactS.PadLeft(64, '0') +
+                   hexCompactV;
+            return result;
+        }
+
+        /// <inheritdoc />
+        public override string ToString() => $"EthKey(PublicAddress={PublicAddress})";
+        
+        private static string GetPublicAddress(string privateKey)
+        {
+            var publicKeyBytes = Secp256k1.CreatePublicKey(ExchangeHelpers.HexToBytesString(privateKey), false);
+
+            var withoutPrefix = new byte[64];
+            Array.Copy(publicKeyBytes, 1, withoutPrefix, 0, 64);
+
+            var hash = CeSha3Keccack.CalculateHash(withoutPrefix);
+            var pubAddress = new byte[20];
+            Array.Copy(hash, hash.Length - 20, pubAddress, 0, 20);
+
+            return "0x" + ExchangeHelpers.BytesToHexString(pubAddress).ToLower();
+        }
+
+
+        private static byte[] HexToBytesString(string hexString)
+        {
+            if (hexString.StartsWith("0x"))
+                hexString = hexString.Substring(2);
+
+            byte[] array = new byte[hexString.Length / 2];
+            for (int i = 0; i < hexString.Length; i += 2)
+            {
+                string value = hexString.Substring(i, 2);
+                array[i / 2] = Convert.ToByte(value, 16);
+            }
+
+            return array;
+        }
+
+        private static string BytesToHexString(IEnumerable<byte> buff)
+        {
+            string text = string.Empty;
+            foreach (byte item in buff)
+                text += item.ToString("X2");
+            return text;
+        }
+    }
+}

CryptoExchange.Net.Web3/MessagePackConverter.cs

@@ -0,0 +1,419 @@
+using System.Collections;
+using System.Globalization;
+using System.Text;
+
+namespace CryptoExchange.Net.Web3
+{
+    /// <summary>
+    /// Message pack converter, not thread safe
+    /// </summary>
+    public class MessagePackConverter
+    {
+        private byte[] _tmp0 = new byte[8];
+        private Encoding _encoder = Encoding.UTF8;
+
+        /// <summary>
+        /// Convert an object to byte array
+        /// </summary>
+        public byte[] Pack(object o)
+        {
+            using var ms = new MemoryStream();
+            Pack(ms, o);
+            return ms.ToArray();
+        }
+
+        /// <summary>
+        /// Convert an object to byte array
+        /// </summary>
+        public void Pack(Stream s, object o)
+        {
+            if (o == null)
+                PackNull(s);
+            else if (o is string objStr)
+                Pack(s, objStr);
+            else if (o is IList objList)
+                Pack(s, objList);
+            else if (o is IDictionary objDict)
+                Pack(s, objDict);
+            else if (o is IDictionary<string, object> objDict2)
+                Pack(s, objDict2);
+            else if (o is bool objBool)
+                Pack(s, objBool);
+            else if (o is sbyte objSbyte)
+                Pack(s, objSbyte);
+            else if (o is byte objByte)
+                Pack(s, objByte);
+            else if (o is short objShort)
+                Pack(s, objShort);
+            else if (o is ushort objUshort)
+                Pack(s, objUshort);
+            else if (o is int objInt)
+                Pack(s, objInt);
+            else if (o is uint objUint)
+                Pack(s, objUint);
+            else if (o is long objLong)
+                Pack(s, objLong);
+            else if (o is ulong objUlong)
+                Pack(s, objUlong);
+            else if (o is float objFloat)
+                Pack(s, objFloat);
+            else if (o is double objDouble)
+                Pack(s, objDouble);
+            else
+                Pack(s, Convert.ToString(o, CultureInfo.InvariantCulture)!);
+        }
+
+        private void PackNull(Stream s)
+        {
+            s.WriteByte(0xc0);
+        }
+
+        private void Pack(Stream s, IList list)
+        {
+            int count = list.Count;
+            if (count < 16)
+            {
+                s.WriteByte((byte)(0x90 + count));
+            }
+            else if (count < 0x10000)
+            {
+                s.WriteByte(0xdc);
+                Write(s, (ushort)count);
+            }
+            else
+            {
+                s.WriteByte(0xdd);
+                Write(s, (uint)count);
+            }
+            foreach (object o in list)
+            {
+                Pack(s, o);
+            }
+        }
+
+        private void Pack(Stream s, IDictionary dict)
+        {
+            int count = dict.Count;
+            if (count < 16)
+            {
+                s.WriteByte((byte)(0x80 + count));
+            }
+            else if (count < 0x10000)
+            {
+                s.WriteByte(0xde);
+                Write(s, (ushort)count);
+            }
+            else
+            {
+                s.WriteByte(0xdf);
+                Write(s, (uint)count);
+            }
+            foreach (object key in dict.Keys)
+            {
+                Pack(s, key);
+                Pack(s, dict[key]!);
+            }
+        }
+
+        private void Pack(Stream s, IDictionary<string, object> dict)
+        {
+            int count = dict.Count;
+            if (count < 16)
+            {
+                s.WriteByte((byte)(0x80 + count));
+            }
+            else if (count < 0x10000)
+            {
+                s.WriteByte(0xde);
+                Write(s, (ushort)count);
+            }
+            else
+            {
+                s.WriteByte(0xdf);
+                Write(s, (uint)count);
+            }
+            foreach (var key in dict.Keys)
+            {
+                Pack(s, key);
+                Pack(s, dict[key]!);
+            }
+        }
+
+        private void Pack(Stream s, bool val)
+        {
+            s.WriteByte(val ? (byte)0xc3 : (byte)0xc2);
+        }
+
+        private void Pack(Stream s, sbyte val)
+        {
+            unchecked
+            {
+                if (val >= -32)
+                {
+                    s.WriteByte((byte)val);
+                }
+                else
+                {
+                    _tmp0[0] = 0xd0;
+                    _tmp0[1] = (byte)val;
+                    s.Write(_tmp0, 0, 2);
+                }
+            }
+        }
+
+        private void Pack(Stream s, byte val)
+        {
+            if (val <= 0x7f)
+            {
+                s.WriteByte(val);
+            }
+            else
+            {
+                _tmp0[0] = 0xcc;
+                _tmp0[1] = val;
+                s.Write(_tmp0, 0, 2);
+            }
+        }
+
+        private void Pack(Stream s, short val)
+        {
+            unchecked
+            {
+                if (val >= 0)
+                {
+                    Pack(s, (ushort)val);
+                }
+                else if (val >= -128)
+                {
+                    Pack(s, (sbyte)val);
+                }
+                else
+                {
+                    s.WriteByte(0xd1);
+                    Write(s, (ushort)val);
+                }
+            }
+        }
+
+        private void Pack(Stream s, ushort val)
+        {
+            unchecked
+            {
+                if (val < 0x100)
+                {
+                    Pack(s, (byte)val);
+                }
+                else
+                {
+                    s.WriteByte(0xcd);
+                    Write(s, val);
+                }
+            }
+        }
+
+        private void Pack(Stream s, int val)
+        {
+            unchecked
+            {
+                if (val >= 0)
+                {
+                    Pack(s, (uint)val);
+                }
+                else if (val >= -128)
+                {
+                    Pack(s, (sbyte)val);
+                }
+                else if (val >= -0x8000)
+                {
+                    s.WriteByte(0xd1);
+                    Write(s, (ushort)val);
+                }
+                else
+                {
+                    s.WriteByte(0xd2);
+                    Write(s, (uint)val);
+                }
+            }
+        }
+
+        private void Pack(Stream s, uint val)
+        {
+            unchecked
+            {
+                if (val < 0x100)
+                {
+                    Pack(s, (byte)val);
+                }
+                else if (val < 0x10000)
+                {
+                    s.WriteByte(0xcd);
+                    Write(s, (ushort)val);
+                }
+                else
+                {
+                    s.WriteByte(0xce);
+                    Write(s, val);
+                }
+            }
+        }
+
+        private void Pack(Stream s, long val)
+        {
+            unchecked
+            {
+                if (val >= 0)
+                {
+                    Pack(s, (ulong)val);
+                }
+                else if (val >= -128)
+                {
+                    Pack(s, (sbyte)val);
+                }
+                else if (val >= -0x8000)
+                {
+                    s.WriteByte(0xd1);
+                    Write(s, (ushort)val);
+                }
+                else if (val >= -0x80000000)
+                {
+                    s.WriteByte(0xd2);
+                    Write(s, (uint)val);
+                }
+                else
+                {
+                    s.WriteByte(0xd3);
+                    Write(s, (ulong)val);
+                }
+            }
+        }
+
+        private void Pack(Stream s, ulong val)
+        {
+            unchecked
+            {
+                if (val < 0x100)
+                {
+                    Pack(s, (byte)val);
+                }
+                else if (val < 0x10000)
+                {
+                    s.WriteByte(0xcd);
+                    Write(s, (ushort)val);
+                }
+                else if (val < 0x100000000)
+                {
+                    s.WriteByte(0xce);
+                    Write(s, (uint)val);
+                }
+                else
+                {
+                    s.WriteByte(0xcf);
+                    Write(s, val);
+                }
+            }
+        }
+
+        private void Pack(Stream s, float val)
+        {
+            var bytes = BitConverter.GetBytes(val);
+            s.WriteByte(0xca);
+            if (BitConverter.IsLittleEndian)
+            {
+                _tmp0[0] = bytes[3];
+                _tmp0[1] = bytes[2];
+                _tmp0[2] = bytes[1];
+                _tmp0[3] = bytes[0];
+                s.Write(_tmp0, 0, 4);
+            }
+            else
+            {
+                s.Write(bytes, 0, 4);
+            }
+        }
+
+        private void Pack(Stream s, double val)
+        {
+            var bytes = BitConverter.GetBytes(val);
+            s.WriteByte(0xcb);
+            if (BitConverter.IsLittleEndian)
+            {
+                _tmp0[0] = bytes[7];
+                _tmp0[1] = bytes[6];
+                _tmp0[2] = bytes[5];
+                _tmp0[3] = bytes[4];
+                _tmp0[4] = bytes[3];
+                _tmp0[5] = bytes[2];
+                _tmp0[6] = bytes[1];
+                _tmp0[7] = bytes[0];
+                s.Write(_tmp0, 0, 8);
+            }
+            else
+            {
+                s.Write(bytes, 0, 8);
+            }
+        }
+
+        private void Pack(Stream s, string val)
+        {
+            var bytes = _encoder.GetBytes(val);
+            if (bytes.Length < 0x20)
+            {
+                s.WriteByte((byte)(0xa0 + bytes.Length));
+            }
+            else if (bytes.Length < 0x100)
+            {
+                s.WriteByte(0xd9);
+                s.WriteByte((byte)bytes.Length);
+            }
+            else if (bytes.Length < 0x10000)
+            {
+                s.WriteByte(0xda);
+                Write(s, (ushort)bytes.Length);
+            }
+            else
+            {
+                s.WriteByte(0xdb);
+                Write(s, (uint)bytes.Length);
+            }
+            s.Write(bytes, 0, bytes.Length);
+        }
+
+        private void Write(Stream s, ushort val)
+        {
+            unchecked
+            {
+                _tmp0[0] = (byte)(val >> 8);
+                _tmp0[1] = (byte)val;
+                s.Write(_tmp0, 0, 2);
+            }
+        }
+
+        private void Write(Stream s, uint val)
+        {
+            unchecked
+            {
+                _tmp0[0] = (byte)(val >> 24);
+                _tmp0[1] = (byte)(val >> 16);
+                _tmp0[2] = (byte)(val >> 8);
+                _tmp0[3] = (byte)val;
+                s.Write(_tmp0, 0, 4);
+            }
+        }
+
+        private void Write(Stream s, ulong val)
+        {
+            unchecked
+            {
+                _tmp0[0] = (byte)(val >> 56);
+                _tmp0[1] = (byte)(val >> 48);
+                _tmp0[2] = (byte)(val >> 40);
+                _tmp0[3] = (byte)(val >> 32);
+                _tmp0[4] = (byte)(val >> 24);
+                _tmp0[5] = (byte)(val >> 16);
+                _tmp0[6] = (byte)(val >> 8);
+                _tmp0[7] = (byte)val;
+                s.Write(_tmp0, 0, 8);
+            }
+        }
+    }
+}

CryptoExchange.Net.Web3/README.md

@@ -0,0 +1,8 @@
+# ![.CryptoExchange.Net.Web3](https://github.com/JKorf/CryptoExchange.Net/blob/ffcb7db8ff597c2f14982d68464015a748815580/CryptoExchange.Net/Icon/icon.png) CryptoExchange.Net.Web3  
+
+Web3 utilities for CryptoExchange.Net implementations.
+
+## Release notes
+* Version 13.0.0 - 03 Nov 2026
+    * Initial release
+

CryptoExchange.Net.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.0.32014.148
+# Visual Studio Version 18
+VisualStudioVersion = 18.10.12201.205 stable
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CryptoExchange.Net", "CryptoExchange.Net\CryptoExchange.Net.csproj", "{3762140C-7FF9-46E5-8EC3-BFB3FC7ADB9B}"
 EndProject
@@ -15,6 +15,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ConsoleClient", "Examples\C
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SharedClients", "Examples\SharedClients\SharedClients.csproj", "{988A87EF-EAEA-4313-A6CF-FA869813D5AB}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CryptoExchange.Net.Web3", "CryptoExchange.Net.Web3\CryptoExchange.Net.Web3.csproj", "{7ABCD210-C708-42ED-AF81-85C0A6089A1E}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -41,6 +43,10 @@ Global
 		{988A87EF-EAEA-4313-A6CF-FA869813D5AB}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{988A87EF-EAEA-4313-A6CF-FA869813D5AB}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{988A87EF-EAEA-4313-A6CF-FA869813D5AB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7ABCD210-C708-42ED-AF81-85C0A6089A1E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7ABCD210-C708-42ED-AF81-85C0A6089A1E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7ABCD210-C708-42ED-AF81-85C0A6089A1E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7ABCD210-C708-42ED-AF81-85C0A6089A1E}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

CryptoExchange.Net/Clients/SocketApiClient.cs

@@ -286,7 +286,7 @@ namespace CryptoExchange.Net.Clients
                     while (true)
                     {
                         // Get a new or existing socket connection
-                        var socketResult = await GetSocketConnection(url, subscription.Authenticated, false, ct, subscription.Topic, subscription.IndividualSubscriptionCount).ConfigureAwait(false);
+                        var socketResult = await GetSocketConnection(url, subscription.Authenticated, false, ct, subscription, subscription.Topic, subscription.IndividualSubscriptionCount).ConfigureAwait(false);
                         if (!socketResult.Success)
                             return WebSocketResult.Fail<UpdateSubscription>(Exchange, socketResult.Error);
 
@@ -309,7 +309,7 @@ namespace CryptoExchange.Net.Clients
 
                         var needsConnecting = !socketConnection.Connected;
 
-                        var connectResult = await ConnectIfNeededAsync(socketConnection, subscription.Authenticated, ct).ConfigureAwait(false);
+                        var connectResult = await ConnectIfNeededAsync(socketConnection, subscription.Authenticated, ct, subscription).ConfigureAwait(false);
                         if (!connectResult.Success)
                             return WebSocketResult.Fail<UpdateSubscription>(Exchange, connectResult.Error!);
 
@@ -482,7 +482,7 @@ namespace CryptoExchange.Net.Clients
             await semaphoreSlim.WaitAsync().ConfigureAwait(false);
             try
             {
-                var socketResult = await GetSocketConnection(url, query.Authenticated, true, ct).ConfigureAwait(false);
+                var socketResult = await GetSocketConnection(url, query.Authenticated, true, ct, processor: query).ConfigureAwait(false);
                 if (!socketResult.Success)
                     return QueryResult.Fail<THandlerResponse>(Exchange, socketResult.Error);
 
@@ -495,7 +495,7 @@ namespace CryptoExchange.Net.Clients
                     released = true;
                 }
 
-                var connectResult = await ConnectIfNeededAsync(socketConnection, query.Authenticated, ct).ConfigureAwait(false);
+                var connectResult = await ConnectIfNeededAsync(socketConnection, query.Authenticated, ct, query).ConfigureAwait(false);
                 if (!connectResult.Success)
                     return QueryResult.Fail<THandlerResponse>(Exchange, connectResult.Error!);
             }
@@ -524,7 +524,18 @@ namespace CryptoExchange.Net.Clients
         /// <param name="authenticated">Whether the socket should authenticated</param>
         /// <param name="ct">Cancellation token</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult> ConnectIfNeededAsync(ISocketConnection socket, bool authenticated, CancellationToken ct)
+        protected virtual Task<CallResult> ConnectIfNeededAsync(ISocketConnection socket, bool authenticated, CancellationToken ct)
+            => ConnectIfNeededAsync(socket, authenticated, ct, null);
+
+        /// <summary>
+        /// Checks if a socket needs to be connected and does so if needed. Also authenticates on the socket if needed
+        /// </summary>
+        /// <param name="socket">The connection to check</param>
+        /// <param name="authenticated">Whether the socket should authenticated</param>
+        /// <param name="processor">The message processor requesting a connection</param>
+        /// <param name="ct">Cancellation token</param>
+        /// <returns></returns>
+        protected virtual async Task<CallResult> ConnectIfNeededAsync(ISocketConnection socket, bool authenticated, CancellationToken ct, IMessageProcessor? processor)
         {
             if (socket.Connected)
                 return CallResult.Ok();
@@ -533,16 +544,13 @@ namespace CryptoExchange.Net.Clients
             if (!connectResult.Success)
                 return connectResult;
 
-            if (ClientOptions.DelayAfterConnect != TimeSpan.Zero)
-                await Task.Delay(ClientOptions.DelayAfterConnect).ConfigureAwait(false);
-
             if (!authenticated || socket.Authenticated)
                 return CallResult.Ok();
 
             if (socket is not SocketConnection sc)
                 throw new InvalidOperationException("HighPerfSocketConnection not supported for authentication");
 
-            var result = await AuthenticateSocketAsync(sc).ConfigureAwait(false);
+            var result = await AuthenticateSocketAsync(sc, processor).ConfigureAwait(false);
             if (!result.Success)
                 await socket.CloseAsync().ConfigureAwait(false);
 
@@ -554,13 +562,22 @@ namespace CryptoExchange.Net.Clients
         /// </summary>
         /// <param name="socket">Socket to authenticate</param>
         /// <returns></returns>
-        public virtual async Task<CallResult> AuthenticateSocketAsync(SocketConnection socket)
+        public virtual Task<CallResult> AuthenticateSocketAsync(SocketConnection socket)
+            => AuthenticateSocketAsync(socket, null);
+
+        /// <summary>
+        /// Authenticate a socket connection
+        /// </summary>
+        /// <param name="socket">Socket to authenticate</param>
+        /// <param name="processor">The message processor requesting authentication</param>
+        /// <returns></returns>
+        public virtual async Task<CallResult> AuthenticateSocketAsync(SocketConnection socket, IMessageProcessor? processor)
         {
             if (GetAuthenticationProvider() == null)
                 return CallResult.Fail(new NoApiCredentialsError());
 
             _logger.AttemptingToAuthenticate(socket.SocketId);
-            var authRequest = await GetAuthenticationRequestAsync(socket).ConfigureAwait(false);
+            var authRequest = await GetAuthenticationRequestAsync(socket, processor).ConfigureAwait(false);
             if (authRequest != null)
             {
                 var result = await socket.SendAndWaitQueryAsync(authRequest).ConfigureAwait(false);
@@ -581,6 +598,7 @@ namespace CryptoExchange.Net.Clients
             return CallResult.Ok();
         }
 
+
         /// <summary>
         /// Should return the request which can be used to authenticate a socket connection
         /// </summary>
@@ -588,6 +606,13 @@ namespace CryptoExchange.Net.Clients
         protected internal virtual Task<Query?> GetAuthenticationRequestAsync(SocketConnection connection) =>
             Task.FromResult(GetAuthenticationProvider()!.GetAuthenticationQuery(this, connection));
 
+        /// <summary>
+        /// Should return the request which can be used to authenticate a socket connection
+        /// </summary>
+        /// <returns></returns>
+        protected internal virtual Task<Query?> GetAuthenticationRequestAsync(SocketConnection connection, IMessageProcessor? processor) =>
+            GetAuthenticationRequestAsync(connection);
+
         /// <summary>
         /// Adds a system subscription. Used for example to reply to ping requests
         /// </summary>
@@ -645,6 +670,18 @@ namespace CryptoExchange.Net.Clients
                 && (AllowTopicsOnTheSameConnection || !connection.Topics.Contains(topic));
         }
 
+        /// <summary>
+        /// Whether the connection can be used for a new subscription or query with the provided parameters
+        /// </summary>
+        /// <param name="connection">The connection to check</param>
+        /// <param name="address">The address set by the request</param>
+        /// <param name="authenticated">Whether the request needs an authenticated connection</param>
+        /// <param name="processor">The processor requesting a connection</param>
+        /// <param name="topic">Topic of the request</param>
+        /// <returns>True if connection can be used</returns>
+        protected virtual bool ConnectionCanBeUsedFor(SocketConnection connection, string address, bool authenticated, IMessageProcessor? processor, string? topic = null)
+            => ConnectionCanBeUsedFor(connection, address, authenticated, topic);
+
         /// <summary>
         /// Gets a connection for a new subscription or query. Can be an existing if there are open position or a new one.
         /// </summary>
@@ -655,15 +692,36 @@ namespace CryptoExchange.Net.Clients
         /// <param name="topic">The subscription topic, can be provided when multiple of the same topics are not allowed on a connection</param>
         /// <param name="individualSubscriptionCount">The number of individual subscriptions in this subscribe request</param>
         /// <returns></returns>
-        protected virtual async Task<CallResult<SocketConnection>> GetSocketConnection(
+        protected virtual Task<CallResult<SocketConnection>> GetSocketConnection(
             string address,
             bool authenticated,
             bool dedicatedRequestConnection,
             CancellationToken ct,
             string? topic = null,
             int individualSubscriptionCount = 1)
+            => GetSocketConnection(address, authenticated, dedicatedRequestConnection, ct, null, topic, individualSubscriptionCount);
+
+        /// <summary>
+        /// Gets a connection for a new subscription or query. Can be an existing if there are open position or a new one.
+        /// </summary>
+        /// <param name="address">The address the socket is for</param>
+        /// <param name="authenticated">Whether the socket should be authenticated</param>
+        /// <param name="dedicatedRequestConnection">Whether a dedicated request connection should be returned</param>
+        /// <param name="ct">Cancellation token</param>
+        /// <param name="topic">The subscription topic, can be provided when multiple of the same topics are not allowed on a connection</param>
+        /// <param name="individualSubscriptionCount">The number of individual subscriptions in this subscribe request</param>
+        /// <param name="processor">The processor requesting a connection</param>
+        /// <returns></returns>
+        protected virtual async Task<CallResult<SocketConnection>> GetSocketConnection(
+            string address,
+            bool authenticated,
+            bool dedicatedRequestConnection, 
+            CancellationToken ct,
+            IMessageProcessor? processor,
+            string? topic = null,
+            int individualSubscriptionCount = 1)
         {
-            var socketQuery = _socketConnections.Where(s => ConnectionCanBeUsedFor(s.Value, address, authenticated, topic)).Select(x => x.Value); // Don't ToList this so the query is executed again when called
+            var socketQuery = _socketConnections.Where(s => ConnectionCanBeUsedFor(s.Value, address, authenticated, processor, topic)).Select(x => x.Value); // Don't ToList this so the query is executed again when called
 
             // If all current socket connections are reconnecting or resubscribing wait for that to finish as we can probably use the existing connection
             var delayStart = DateTime.UtcNow;
@@ -841,6 +899,8 @@ namespace CryptoExchange.Net.Clients
                 return connectResult;
             }
 
+            // Remove the connection and stop any reconnect processing before disposing it.
+            await socketConnection.CloseAsync().ConfigureAwait(false);
             socketConnection.Dispose();
             return connectResult;
         }
@@ -862,7 +922,7 @@ namespace CryptoExchange.Net.Clients
                 RateLimitAdmissionCallbackRequest = () => AdmissionOverride.Value,
                 Proxy = ClientOptions.Proxy,
                 Timeout = ApiOptions.SocketNoDataTimeout ?? ClientOptions.SocketNoDataTimeout,
-                ReceiveBufferSize = ClientOptions.ReceiveBufferSize,
+                ReceiveBufferSize = ClientOptions.ReceiveBufferSize
             };
 
         /// <summary>

CryptoExchange.Net/CryptoExchange.Net.csproj

@@ -6,9 +6,9 @@
     <PackageId>CryptoExchange.Net</PackageId>
     <Authors>JKorf</Authors>
     <Description>CryptoExchange.Net is a base library which is used to implement different cryptocurrency (exchange) API's. It provides a standardized way of implementing different API's, which results in a very similar experience for users of the API implementations.</Description>
-    <PackageVersion>13.1.0</PackageVersion>
-    <AssemblyVersion>13.1.0</AssemblyVersion>
-    <FileVersion>13.1.0</FileVersion>
+    <PackageVersion>13.2.3</PackageVersion>
+    <AssemblyVersion>13.2.3</AssemblyVersion>
+    <FileVersion>13.2.3</FileVersion>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageTags>OKX;OKX.Net;Mexc;Mexc.Net;Kucoin;Kucoin.Net;Kraken;Kraken.Net;Huobi;Huobi.Net;CoinEx;CoinEx.Net;Bybit;Bybit.Net;Bitget;Bitget.Net;Bitfinex;Bitfinex.Net;Binance;Binance.Net;CryptoCurrency;CryptoCurrency Exchange;CryptoExchange.Net</PackageTags>
     <RepositoryType>git</RepositoryType>

CryptoExchange.Net/Objects/Error.cs

@@ -138,6 +138,11 @@ namespace CryptoExchange.Net.Objects
         /// </summary>
         public NoApiCredentialsError() : base(null, _errorInfo, null) { }
 
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public NoApiCredentialsError(string message) : base(null, _errorInfo with { Message = message }, null) { }
+
         /// <summary>
         /// ctor
         /// </summary>

CryptoExchange.Net/Objects/Options/SocketApiOptions.cs

@@ -19,6 +19,11 @@ namespace CryptoExchange.Net.Objects.Options
         /// </summary>
         public int? MaxSocketConnections { get; set; }
 
+        /// <summary>
+        /// The time to wait after connecting a socket before sending messages. Can be used for API's which will rate limit if you subscribe directly after connecting.
+        /// </summary>
+        public TimeSpan? DelayAfterConnect { get; set; }
+
         /// <summary>
         /// Set the values of this options on the target options
         /// </summary>
@@ -28,6 +33,7 @@ namespace CryptoExchange.Net.Objects.Options
             item.SocketNoDataTimeout = SocketNoDataTimeout;
             item.AutoTimestamp = AutoTimestamp;
             item.MaxSocketConnections = MaxSocketConnections;
+            item.DelayAfterConnect = DelayAfterConnect;
             return item;
         }
     }

CryptoExchange.Net/SharedApis/CapabilityReferences/SharedCapabilities.Funding.cs

@@ -23,6 +23,10 @@ namespace CryptoExchange.Net.SharedApis
             /// Get user funding history capability.
             /// </summary>
             public static SharedRestCapability<IGetUserFundingHistory, IGetUserFundingHistoryRest> GetUserFundingHistory { get; } = new();
+            /// <summary>
+            /// Subscribe to funding info updates capability.
+            /// </summary>
+            public static SharedCapabilityReference<ISubscribeFundingInfoSocket> SubscribeFundingInfo { get; } = new();
         }
     }
 }

CryptoExchange.Net/SharedApis/Models/SharedIncrementalOrderBook.cs

@@ -0,0 +1,25 @@
+using CryptoExchange.Net.Interfaces;
+
+namespace CryptoExchange.Net.SharedApis
+{
+    /// <summary>
+    /// Order book info
+    /// </summary>
+    public record SharedIncrementalOrderBook : SharedOrderBook
+    {
+        /// <summary>
+        /// The sequence number of the first book update in this update.
+        /// </summary>
+        public long? StartSequenceNumber { get; set; }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public SharedIncrementalOrderBook(SharedQuantityType quantityType, long? startSequenceNumber, long? endSequenceNumber, ISymbolOrderBookEntry[] asks, ISymbolOrderBookEntry[] bids)
+            :base(quantityType, endSequenceNumber, asks, bids)
+        {
+            StartSequenceNumber = startSequenceNumber;
+        }
+    }
+
+}

CryptoExchange.Net/SharedApis/SharedUtils.cs

@@ -668,6 +668,20 @@ namespace CryptoExchange.Net.SharedApis
                 .ParallelEnumerateAsync();
         }
 
+        /// <summary>
+        /// Subscribe to funding info updates for all capabilities in parallel and return results as they arrive
+        /// </summary>
+        public static IAsyncEnumerable<WebSocketResult<UpdateSubscription>> SubscribeAllAsync(
+            this IEnumerable<SharedCapabilityResolution<ISubscribeFundingInfoSocket>> capabilities,
+            SubscribeFundingInfoRequest request,
+            Action<DataEvent<SharedFundingInfo>> onData,
+            CancellationToken ct = default)
+        {
+            return capabilities
+                .Select(x => x.Capability.SubscribeToFundingInfoUpdatesAsync(request, onData, ct))
+                .ParallelEnumerateAsync();
+        }
+
         /// <summary>
         /// Subscribe to kline updates for all capabilities in parallel and return results as they arrive
         /// </summary>
@@ -716,11 +730,11 @@ namespace CryptoExchange.Net.SharedApis
         public static IAsyncEnumerable<WebSocketResult<UpdateSubscription>> SubscribeAllAsync(
             this IEnumerable<SharedCapabilityResolution<ISubscribeIncrementalOrderBookSocket>> capabilities,
             SubscribeOrderBookRequest request,
-            Action<DataEvent<SharedOrderBook>> onData,
+            Action<DataEvent<SharedIncrementalOrderBook>> onData,
             CancellationToken ct = default)
         {
             return capabilities
-                .Select(x => x.Capability.SubscribeToOrderBookUpdatesAsync(request, onData, ct))
+                .Select(x => x.Capability.SubscribeToIncrementalOrderBookUpdatesAsync(request, onData, ct))
                 .ParallelEnumerateAsync();
         }
 

CryptoExchange.Net/SharedApis/V2/Funding/SubscribeFundingInfo/ISubscribeFundingInfoSocket.cs

@@ -0,0 +1,28 @@
+using CryptoExchange.Net.Objects;
+using CryptoExchange.Net.Objects.Sockets;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.SharedApis
+{
+    /// <summary>
+    /// Operation for subscribing to funding info updates
+    /// </summary>
+    public interface ISubscribeFundingInfoSocket : ISharedSubscription
+    {
+        /// <summary>
+        /// Funding info subscription options
+        /// </summary>
+        SubscribeFundingInfoOptions SubscribeFundingInfoOptions { get; }
+
+        /// <summary>
+        /// Subscribe to funding info updates
+        /// </summary>
+        /// <param name="request">Request info</param>
+        /// <param name="handler">Update handler</param>
+        /// <param name="ct">Cancellation token, can be used to stop the updates</param>
+        /// <returns></returns>
+        Task<WebSocketResult<UpdateSubscription>> SubscribeToFundingInfoUpdatesAsync(SubscribeFundingInfoRequest request, Action<DataEvent<SharedFundingInfo>> handler, CancellationToken ct = default);
+    }
+}

CryptoExchange.Net/SharedApis/V2/Funding/SubscribeFundingInfo/SubscribeFundingInfoOptions.cs

@@ -0,0 +1,29 @@
+using CryptoExchange.Net.Objects;
+using System;
+using System.Linq;
+
+namespace CryptoExchange.Net.SharedApis
+{
+    /// <summary>
+    /// Options for subscribing to funding info updates
+    /// </summary>
+    public class SubscribeFundingInfoOptions : CapabilityOptions<SubscribeFundingInfoRequest, ISubscribeFundingInfoSocket>
+    {
+        /// <inheritdoc />
+        public override string Description => "Subscribe to funding info updates for a symbol";
+
+        private static readonly RequestParameterDescription[] _defaultParameterRules = new[]
+        {
+            RequestParameterRule<SubscribeFundingInfoRequest>.Optional(x => x.Symbol, "The symbol to subscribe to", new SharedSymbol(TradingMode.PerpetualLinear, "ETH", "USDT")),
+            RequestParameterRule<SubscribeFundingInfoRequest>.Optional(x => x.Symbols, "The symbols to subscribe to", new[] { new SharedSymbol(TradingMode.PerpetualLinear, "ETH", "USDT") }),
+        };
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public SubscribeFundingInfoOptions(string exchange, bool needsAuthentication)
+            : base(exchange, needsAuthentication, nameof(ISubscribeFundingInfoSocket.SubscribeToFundingInfoUpdatesAsync), _defaultParameterRules, SharedTradingModeSets.Futures)
+        {
+        }
+    }
+}

CryptoExchange.Net/SharedApis/V2/Funding/SubscribeFundingInfo/SubscribeFundingInfoRequest.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+
+namespace CryptoExchange.Net.SharedApis
+{
+    /// <summary>
+    /// Request to subscribe to  funding info updates for a symbol
+    /// </summary>
+    public record SubscribeFundingInfoRequest : SharedSymbolRequest
+    {
+        /// <summary>
+        /// ctor
+        /// </summary>
+        /// <param name="symbol">The symbol to subscribe to</param>
+        /// <param name="exchangeParameters">Exchange specific parameters</param>
+        public SubscribeFundingInfoRequest(SharedSymbol symbol, ExchangeParameters? exchangeParameters = null)
+            : base(symbol, exchangeParameters)
+        {
+        }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        /// <param name="symbols">The symbols to subscribe to</param>
+        /// <param name="exchangeParameters">Exchange specific parameters</param>
+        public SubscribeFundingInfoRequest(IEnumerable<SharedSymbol> symbols, ExchangeParameters? exchangeParameters = null)
+            : base(symbols, exchangeParameters)
+        {
+        }
+    }
+}

CryptoExchange.Net/SharedApis/V2/OrderBooks/SubscribeIncrementalOrderBook/ISubscribeIncrementalOrderBook.cs

@@ -14,7 +14,7 @@ namespace CryptoExchange.Net.SharedApis
         /// <summary>
         /// Order book subscription options
         /// </summary>
-        SubscribeOrderBookOptions SubscribeOrderBookOptions { get; }
+        SubscribeIncrementalOrderBookOptions SubscribeIncrementalOrderBookOptions { get; }
 
         /// <summary>
         /// Subscribe to incremental order book updates for a symbol
@@ -23,6 +23,6 @@ namespace CryptoExchange.Net.SharedApis
         /// <param name="handler">Update handler</param>
         /// <param name="ct">Cancellation token, can be used to stop the updates</param>
         /// <returns></returns>
-        Task<WebSocketResult<UpdateSubscription>> SubscribeToOrderBookUpdatesAsync(SubscribeOrderBookRequest request, Action<DataEvent<SharedOrderBook>> handler, CancellationToken ct = default);
+        Task<WebSocketResult<UpdateSubscription>> SubscribeToIncrementalOrderBookUpdatesAsync(SubscribeOrderBookRequest request, Action<DataEvent<SharedIncrementalOrderBook>> handler, CancellationToken ct = default);
     }
 }

CryptoExchange.Net/SharedApis/V2/OrderBooks/SubscribeIncrementalOrderBook/SubscribeIncrementalOrderBookOptions.cs

@@ -33,7 +33,7 @@ namespace CryptoExchange.Net.SharedApis
         /// ctor
         /// </summary>
         public SubscribeIncrementalOrderBookOptions(string exchange, bool needsAuthentication, int[] limits, SharedOrderBookSubscriptionType updateType)
-            : base(exchange, needsAuthentication, nameof(ISubscribeIncrementalOrderBookSocket.SubscribeToOrderBookUpdatesAsync), _defaultParameterRules)
+            : base(exchange, needsAuthentication, nameof(ISubscribeIncrementalOrderBookSocket.SubscribeToIncrementalOrderBookUpdatesAsync), _defaultParameterRules)
         {
             SupportedLimits = limits;
             UpdateType = updateType;

CryptoExchange.Net/Sockets/Default/CryptoExchangeWebSocketClient.cs

@@ -446,27 +446,28 @@ namespace CryptoExchange.Net.Sockets.Default
                 if (_closeTask?.IsCompleted == false)
                 {
                     _logger.SocketCloseAsyncWaitingForExistingCloseTask(Id);
-                    await _closeTask.ConfigureAwait(false);
-                    return;
                 }
-
-                if (!IsOpen)
+                else
                 {
+                    if (!IsOpen)
                         _logger.SocketCloseAsyncSocketNotOpen(Id);
-                    return;
-                }
-
+                    else
                         _logger.SocketClosing(Id);
+
                     _closeTask = CloseInternalAsync();
                 }
+            }
             finally
             {
                 _closeSem.Release();
             }
 
             await _closeTask.ConfigureAwait(false);
+            
+            // Processing may still be running after the socket closes; finish before the caller disposes it.
             if(_processTask != null)
                 await _processTask.ConfigureAwait(false);
+            
             await (OnClose?.Invoke() ?? Task.CompletedTask).ConfigureAwait(false);
             _logger.SocketClosed(Id);
         }

CryptoExchange.Net/Sockets/Default/SocketConnection.cs

@@ -424,6 +424,9 @@ namespace CryptoExchange.Net.Sockets.Default
             {
                 try
                 {
+                    if ((ApiClient.ApiOptions.DelayAfterConnect ?? ApiClient.ClientOptions.DelayAfterConnect) != TimeSpan.Zero)
+                        await Task.Delay(ApiClient.ApiOptions.DelayAfterConnect ?? ApiClient.ClientOptions.DelayAfterConnect).ConfigureAwait(false);
+
                     var reconnectSuccessful = await ProcessReconnectAsync().ConfigureAwait(false);
                     if (!reconnectSuccessful.Success)
                     {
@@ -616,7 +619,17 @@ namespace CryptoExchange.Net.Sockets.Default
         /// Connect the websocket
         /// </summary>
         /// <returns></returns>
-        public async Task<CallResult> ConnectAsync(CancellationToken ct) => await _socket.ConnectAsync(ct).ConfigureAwait(false);
+        public async Task<CallResult> ConnectAsync(CancellationToken ct)
+        {
+            var result = await _socket.ConnectAsync(ct).ConfigureAwait(false);
+            if (!result.Success)
+                return result;
+
+            if ((ApiClient.ApiOptions.DelayAfterConnect ?? ApiClient.ClientOptions.DelayAfterConnect) != TimeSpan.Zero)
+                await Task.Delay(ApiClient.ApiOptions.DelayAfterConnect ?? ApiClient.ClientOptions.DelayAfterConnect).ConfigureAwait(false);
+
+            return result;
+        }
 
         /// <summary>
         /// Retrieve the underlying socket
@@ -689,7 +702,7 @@ namespace CryptoExchange.Net.Sockets.Default
             if (subscription.CancellationTokenRegistration.HasValue)
                 subscription.CancellationTokenRegistration.Value.Dispose();
 
-            bool anyDuplicateSubscription = _listeners.OfType<Subscription>().Any(x => x != subscription && x.MessageRouter.Routes.All(l => subscription.MessageRouter.ContainsCheck(l)));
+            bool anyDuplicateSubscription = SubscriptionIsCovered(subscription);
             bool shouldCloseConnection = _listeners.OfType<Subscription>().All(r => !r.UserSubscription || r.Status == SubscriptionStatus.Closing || r.Status == SubscriptionStatus.Closed) && !DedicatedRequestConnection.IsDedicatedRequestConnection;
 
             if (!anyDuplicateSubscription)
@@ -1056,6 +1069,36 @@ namespace CryptoExchange.Net.Sockets.Default
             return CallResult.Ok();
         }
 
+        /// <summary>
+        /// Whether there is currently a subscription covering all the routes the subscription lists
+        /// </summary>
+        protected bool SubscriptionIsCovered(Subscription subscription)
+            => _listeners.OfType<Subscription>().Any(
+                x => x != subscription
+                && x.Active
+                && subscription.MessageRouter.Routes.All(l => x.MessageRouter.ContainsCheck(l)));
+
+        /// <summary>
+        /// Whether there is a subscription earlier in the list covering all the routes the subscription lists
+        /// </summary>
+        protected bool IsCoveredByEarlierSubscription(Subscription subscription)
+        {
+            if (subscription.MessageRouter.Routes.Length == 0)
+                // Can be subscription which only knows what to listen to after receiving the subscribe response, for example Bitfinex
+                return false;
+
+            foreach (var other in _listeners.OfType<Subscription>())
+            {
+                if (other == subscription)
+                    return false;
+
+                if (other.Active && subscription.MessageRouter.Routes.All(x => other.MessageRouter.ContainsCheck(x)))
+                    return true;
+            }
+
+            return false;
+        }
+
         /// <summary>
         /// Try to subscribe a new subscription by sending the subscribe query and wait for the result as needed
         /// </summary>
@@ -1090,11 +1133,11 @@ namespace CryptoExchange.Net.Sockets.Default
                 return WebSocketResult.Ok(ApiClient.Exchange, SocketId, default, 0, ConnectionUriString);
             }
 
-            var subCompleteHandler = () =>
+            var subCompleteHandler = (bool success) =>
             {
-                subscription.Status = subQuery.Success ? SubscriptionStatus.Subscribed : SubscriptionStatus.Pending;
+                subscription.Status = success ? SubscriptionStatus.Subscribed : SubscriptionStatus.Pending;
                 subscription.HandleSubQueryResponse(this, subQuery.Response);
-                if (newSubscription && subQuery.Success)
+                if (newSubscription && success)
                 {
                     subscription.TokenExpired += HandleTokenExpired;
                     if (subCancelToken != default)
@@ -1109,6 +1152,14 @@ namespace CryptoExchange.Net.Sockets.Default
             };
             subQuery.OnComplete = subCompleteHandler;
 
+            // For duplicate subscription don't send another subscribe request but just handle it internally
+            // Unsubscribe also doesn't unsubscribe when there is still a duplicate subscription running
+            if (IsCoveredByEarlierSubscription(subscription))
+            {
+                subQuery.Complete();
+                return WebSocketResult.Ok(ApiClient.Exchange, SocketId, default, subQuery.Id, ConnectionUriString);
+            }
+
             var subQueryResult = await SendAndWaitQueryAsync(subQuery).ConfigureAwait(false);
             if (!subQueryResult.Success)
             {
@@ -1119,9 +1170,6 @@ namespace CryptoExchange.Net.Sockets.Default
                 return WebSocketResult.Fail(ApiClient.Exchange, subQueryResult.Error!);
             }
 
-            if (!subQuery.ExpectsResponse)
-                subCompleteHandler();
-
             return subQueryResult;
         }
 

CryptoExchange.Net/Sockets/HighPerf/HighPerfSocketConnection.cs

@@ -198,8 +198,13 @@ namespace CryptoExchange.Net.Sockets.HighPerf
         {
             var result = await _socket.ConnectAsync(ct).ConfigureAwait(false);
             if (result.Success)
+            {
                 _processTask = ProcessAsync(_cts.Token);
 
+                if ((ApiClient.ApiOptions.DelayAfterConnect ?? ApiClient.ClientOptions.DelayAfterConnect) != TimeSpan.Zero)
+                    await Task.Delay(ApiClient.ApiOptions.DelayAfterConnect ?? ApiClient.ClientOptions.DelayAfterConnect).ConfigureAwait(false);
+            }
+
             return result;
         }
 

CryptoExchange.Net/Sockets/Query.cs

@@ -124,7 +124,7 @@ namespace CryptoExchange.Net.Sockets
         /// <summary>
         /// On complete callback
         /// </summary>
-        public Action? OnComplete { get; set; }
+        public Action<bool>? OnComplete { get; set; }
 
         /// <inheritdoc />
         public event Action? OnMessageRouterUpdated;
@@ -157,8 +157,7 @@ namespace CryptoExchange.Net.Sockets
             }
             else
             {
-                Completed = true;
-                _event.Set();
+                Complete();
             }
         }
 
@@ -175,6 +174,11 @@ namespace CryptoExchange.Net.Sockets
         /// </summary>
         public abstract void Timeout();
 
+        /// <summary>
+        /// Mark request as successfully completed
+        /// </summary>
+        public abstract void Complete();
+
         /// <summary>
         /// Mark request as failed
         /// </summary>
@@ -248,7 +252,7 @@ namespace CryptoExchange.Net.Sockets
             {
                 Completed = true;
                 _event.Set();
-                OnComplete?.Invoke();
+                OnComplete?.Invoke(Success);
             }
 
             return handled;
@@ -267,7 +271,19 @@ namespace CryptoExchange.Net.Sockets
 
             Completed = true;
             _event.Set();
-            OnComplete?.Invoke();
+            OnComplete?.Invoke(Success);
+        }
+
+        /// <inheritdoc />
+        public override void Complete()
+        {
+            if (Completed)
+                return;
+
+            Result = CallResult<THandlerResponse>.Ok(default!);
+            Completed = true;
+            _event.Set();
+            OnComplete?.Invoke(Success);
         }
 
         /// <inheritdoc />
@@ -280,7 +296,7 @@ namespace CryptoExchange.Net.Sockets
             Completed = true;
 
             _event.Set();
-            OnComplete?.Invoke();
+            OnComplete?.Invoke(Success);
         }
     }
 }

CryptoExchange.Net/Testing/RestRequestValidator.cs

@@ -168,12 +168,18 @@ namespace CryptoExchange.Net.Testing
             {
                 // Validate request body
                 Dictionary<string, object> bodyParameters;
-                if (result.RequestBody!.StartsWith("{") || result.RequestBody.StartsWith("["))
+                if (string.IsNullOrEmpty(result.RequestBody))
                 {
+                    bodyParameters = new Dictionary<string, object>();
+                }
+                else if (result.RequestBody!.StartsWith("{") || result.RequestBody.StartsWith("["))
+                {
+                    // Json
                     bodyParameters = JsonSerializer.Deserialize<Dictionary<string, object>>(result.RequestBody!)!;
                 }
                 else
                 {
+                    // Form data
                     var splitKvp = result.RequestBody.Split('&');
                     bodyParameters = splitKvp.Select(x => x.Split('=')).ToDictionary(x => x[0], x => (object)x[1]);
                 }
@@ -196,7 +202,7 @@ namespace CryptoExchange.Net.Testing
         private void CompareParameters(Dictionary<string, object> expectedUrlParameters, Dictionary<string, object> parameters, List<string>? ignoreParamValidation)
         {
             if (expectedUrlParameters.Count > parameters.Count)
-                throw new Exception($"Url parameters count not matched. Expected: {expectedUrlParameters.Count}, Actual: {parameters.Count}");
+                throw new Exception($"Parameters count not matched. Expected: {expectedUrlParameters.Count}, Actual: {parameters.Count}");
 
             foreach (var kvp in expectedUrlParameters)
             {
@@ -204,10 +210,10 @@ namespace CryptoExchange.Net.Testing
                     continue;
 
                 if (!parameters.TryGetValue(kvp.Key, out var value))
-                    throw new Exception($"Url parameter {kvp.Key} not found in actual parameters");
+                    throw new Exception($"Parameter {kvp.Key} not found in actual parameters");
 
                 if (Convert.ToString(kvp.Value, CultureInfo.InvariantCulture) != Convert.ToString(value, CultureInfo.InvariantCulture))
-                    throw new Exception($"Url parameter {kvp.Key} value not matched. Expected: {kvp.Value}, Actual: {value}");
+                    throw new Exception($"Parameter {kvp.Key} value not matched. Expected: {kvp.Value}, Actual: {value}");
             }
         }
 

CryptoExchange.Net/Trackers/UserData/ItemTrackers/BalanceTracker.cs

@@ -28,10 +28,11 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             SharedAccountType accountType,
             TrackerItemConfig config,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, symbolTracker, UserDataType.Balances, restClient.Exchange, config)
+            ) : base(logger, symbolTracker, UserDataType.Balances, restClient.Exchange)
         {
-            if (_socketClient == null)
+            if (socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
+            SetConfig(config);
 
             _restClient = restClient;
             _socketClient = socketClient;

CryptoExchange.Net/Trackers/UserData/ItemTrackers/FuturesOrderTracker.cs

@@ -24,6 +24,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         private readonly Dictionary<string, int> _openOrderNotReturnedTimes = new();
         private readonly TimeSpan _pollOverlapPeriod = TimeSpan.FromSeconds(3);
 
+        private bool _openOrderWarningDone = false;
         internal event Func<UpdateSource, SharedUserTrade[], Task>? OnTradeUpdate;
 
         /// <summary>
@@ -39,10 +40,11 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             IEnumerable<SharedSymbol> symbols,
             bool onlyTrackProvidedSymbols,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, symbolTracker, UserDataType.Orders, openRestClient.Exchange, config)
+            ) : base(logger, symbolTracker, UserDataType.Orders, openRestClient.Exchange)
         {
-            if (_socketClient == null)
+            if (socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
+            SetConfig(config);
 
             _openOrdersClient = openRestClient;
             _closedOrdersClient = closedRestClient;
@@ -234,7 +236,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             }
             else
             {
-                foreach (var symbol in _symbolTracker.GetTrackedSymbols())
+                var trackedSymbols = _symbolTracker.GetTrackedSymbols();
+                if (!_openOrderWarningDone && trackedSymbols.Count() == 0)
+                {
+                    _openOrderWarningDone = true;
+                    _logger.LogDebug("No tracked symbols specified while symbol is required to retrieve open orders. Tracked symbols should be updated before orders may be returned");
+                }
+
+                foreach (var symbol in trackedSymbols)
                 {
                     var openOrdersResult = await _openOrdersClient.GetOpenFuturesOrdersAsync(new GetOpenOrdersRequest(symbol, exchangeParameters: _exchangeParameters)).ConfigureAwait(false);
                     if (!openOrdersResult.Success)

CryptoExchange.Net/Trackers/UserData/ItemTrackers/FuturesUserTradeTracker.cs

@@ -34,10 +34,11 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             IEnumerable<SharedSymbol> symbols,
             bool onlyTrackProvidedSymbols,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, symbolTracker, UserDataType.Trades, restClient.Exchange, config)
+            ) : base(logger, symbolTracker, UserDataType.Trades, restClient.Exchange)
         {
-            if (_socketClient == null)
+            if (socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
+            SetConfig(config);
 
             _restClient = restClient;
             _socketClient = socketClient;

CryptoExchange.Net/Trackers/UserData/ItemTrackers/PositionTracker.cs

@@ -37,10 +37,11 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             bool onlyTrackProvidedSymbols,
             bool websocketPositionUpdatesAreFullSnapshots,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, symbolTracker, UserDataType.Positions, restClient.Exchange, config)
+            ) : base(logger, symbolTracker, UserDataType.Positions, restClient.Exchange)
         {
-            if (_socketClient == null)
+            if (socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
+            SetConfig(config);
 
             _restClient = restClient;
             _socketClient = socketClient;

CryptoExchange.Net/Trackers/UserData/ItemTrackers/SpotOrderTracker.cs

@@ -23,6 +23,7 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
         private readonly bool _timeFilterSupportedClosedOrders;
         private readonly Dictionary<string, int> _openOrderNotReturnedTimes = new();
         private readonly TimeSpan _pollOverlapPeriod = TimeSpan.FromSeconds(3);
+        private bool _openOrderWarningDone = false;
 
         internal event Func<UpdateSource, SharedUserTrade[], Task>? OnTradeUpdate;
 
@@ -39,10 +40,11 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             IEnumerable<SharedSymbol> symbols,
             bool onlyTrackProvidedSymbols,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, symbolTracker, UserDataType.Orders, openOrderClient.Exchange, config)
+            ) : base(logger, symbolTracker, UserDataType.Orders, openOrderClient.Exchange)
         {
-            if (_socketClient == null)
+            if (socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
+            SetConfig(config);
 
             _openOrderClient = openOrderClient;
             _closedOrderClient = closedOrderClient;
@@ -244,7 +246,14 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             }
             else
             {
-                foreach (var symbol in _symbolTracker.GetTrackedSymbols())
+                var trackedSymbols = _symbolTracker.GetTrackedSymbols();
+                if (!_openOrderWarningDone && trackedSymbols.Count() == 0)
+                {
+                    _openOrderWarningDone = true;
+                    _logger.LogDebug("No tracked symbols specified while symbol is required to retrieve open orders. Tracked symbols should be updated before orders may be returned");
+                }
+
+                foreach (var symbol in trackedSymbols)
                 {
                     var openOrdersResult = await _openOrderClient.GetOpenSpotOrdersAsync(new GetOpenOrdersRequest(symbol, exchangeParameters: _exchangeParameters)).ConfigureAwait(false);
                     if (!openOrdersResult.Success)

CryptoExchange.Net/Trackers/UserData/ItemTrackers/SpotUserTradeTracker.cs

@@ -34,10 +34,11 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             IEnumerable<SharedSymbol> symbols,
             bool onlyTrackProvidedSymbols,
             ExchangeParameters? exchangeParameters = null
-            ) : base(logger, symbolTracker, UserDataType.Trades, restClient.Exchange, config)
+            ) : base(logger, symbolTracker, UserDataType.Trades, restClient.Exchange)
         {
-            if (_socketClient == null)
+            if (socketClient == null)
                 config = config with { PollIntervalConnected = config.PollIntervalDisconnected };
+            SetConfig(config);
 
             _restClient = restClient;
             _socketClient = socketClient;

CryptoExchange.Net/Trackers/UserData/ItemTrackers/UserDataItemTracker.cs

@@ -242,15 +242,21 @@ namespace CryptoExchange.Net.Trackers.UserData.ItemTrackers
             ILogger logger,
             UserDataSymbolTracker symbolTracker,
             UserDataType dataType,
-            string exchange,
-            TrackerItemConfig config) : base(logger, dataType, exchange)
+            string exchange) : base(logger, dataType, exchange)
+        {
+            _isSymbolModel = typeof(T).IsSubclassOf(typeof(SharedSymbolModel));
+            _symbolTracker = symbolTracker;
+        }
+
+        /// <summary>
+        /// Set the tracker item config
+        /// </summary>
+        protected void SetConfig(TrackerItemConfig config)
         {
             _pollIntervalDisconnected = config.PollIntervalDisconnected;
             _pollIntervalConnected = config.PollIntervalConnected;
             _pollAtStart = config.PollAtStart;
             _retentionTime = config is TrackerTimedItemConfig timeConfig ? timeConfig.RetentionTime : TimeSpan.MaxValue;
-            _isSymbolModel = typeof(T).IsSubclassOf(typeof(SharedSymbolModel));
-            _symbolTracker = symbolTracker;
         }
 
         /// <summary>

Examples/BlazorClient/BlazorClient.csproj

@@ -5,36 +5,36 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Binance.Net" Version="13.6.0" />
-    <PackageReference Include="Bitfinex.Net" Version="11.6.0" />
-    <PackageReference Include="BitMart.Net" Version="4.5.0" />
-    <PackageReference Include="BloFin.Net" Version="3.5.0" />
-    <PackageReference Include="Bybit.Net" Version="7.6.0" />
-    <PackageReference Include="CoinEx.Net" Version="11.5.0" />
-    <PackageReference Include="CoinW.Net" Version="3.5.0" />
-    <PackageReference Include="CryptoCom.Net" Version="4.5.0" />
-    <PackageReference Include="DeepCoin.Net" Version="4.5.0" />
-    <PackageReference Include="GateIo.Net" Version="4.7.0" />
-    <PackageReference Include="HyperLiquid.Net" Version="5.8.0" />
-    <PackageReference Include="JK.BingX.Net" Version="4.6.0" />
-    <PackageReference Include="JK.Bitget.Net" Version="4.6.0" />
-    <PackageReference Include="JK.Mexc.Net" Version="6.7.0" />
-    <PackageReference Include="JK.OKX.Net" Version="5.5.0" />
-    <PackageReference Include="Jkorf.Aster.Net" Version="4.5.0" />
-    <PackageReference Include="JKorf.Coinbase.Net" Version="4.6.0" />
-    <PackageReference Include="JKorf.HTX.Net" Version="9.6.0" />
-    <PackageReference Include="JKorf.Lighter.Net" Version="1.6.0" />
-    <PackageReference Include="JKorf.Upbit.Net" Version="3.5.0" />
-    <PackageReference Include="KrakenExchange.Net" Version="8.5.0" />
-    <PackageReference Include="Kucoin.Net" Version="9.6.0" />
-    <PackageReference Include="LBank.Net" Version="1.2.0" />
-    <PackageReference Include="Pionex.Net" Version="1.3.0" />
+    <PackageReference Include="Binance.Net" Version="13.7.0" />
+    <PackageReference Include="Bitfinex.Net" Version="11.7.1" />
+    <PackageReference Include="Bitstamp.Net" Version="2.6.0" />
+    <PackageReference Include="Bitunix.Net" Version="1.0.1" />
+    <PackageReference Include="BloFin.Net" Version="3.6.0" />
+    <PackageReference Include="Bybit.Net" Version="7.7.0" />
+    <PackageReference Include="CoinW.Net" Version="3.6.2" />
+    <PackageReference Include="CryptoCom.Net" Version="4.6.0" />
+    <PackageReference Include="DeepCoin.Net" Version="4.6.1" />
+    <PackageReference Include="GateIo.Net" Version="4.8.0" />
+    <PackageReference Include="HyperLiquid.Net" Version="5.9.1" />
+    <PackageReference Include="JK.BingX.Net" Version="4.7.0" />
+    <PackageReference Include="JK.Bitget.Net" Version="4.9.0" />
+    <PackageReference Include="JK.Mexc.Net" Version="6.8.0" />
+    <PackageReference Include="JK.OKX.Net" Version="5.7.0" />
+    <PackageReference Include="Jkorf.Aster.Net" Version="4.6.0" />
+    <PackageReference Include="JKorf.Coinbase.Net" Version="4.7.0" />
+    <PackageReference Include="JKorf.HTX.Net" Version="9.7.0" />
+    <PackageReference Include="JKorf.Lighter.Net" Version="1.7.0" />
+    <PackageReference Include="JKorf.Upbit.Net" Version="3.6.0" />
+    <PackageReference Include="KrakenExchange.Net" Version="8.6.0" />
+    <PackageReference Include="Kucoin.Net" Version="9.8.0" />
+    <PackageReference Include="LBank.Net" Version="1.3.0" />
+    <PackageReference Include="Pionex.Net" Version="1.4.0" />
     <PackageReference Include="Serilog.AspNetCore" Version="10.0.0" />
-    <PackageReference Include="Tapbit.Net" Version="1.1.0" />
-    <PackageReference Include="Toobit.Net" Version="4.5.0" />
-    <PackageReference Include="Weex.Net" Version="2.5.0" />
-    <PackageReference Include="WhiteBit.Net" Version="4.5.0" />
-    <PackageReference Include="XT.Net" Version="4.6.0" />
+    <PackageReference Include="Tapbit.Net" Version="1.2.0" />
+    <PackageReference Include="Toobit.Net" Version="4.6.0" />
+    <PackageReference Include="Weex.Net" Version="2.6.0" />
+    <PackageReference Include="WhiteBit.Net" Version="4.7.0" />
+    <PackageReference Include="XT.Net" Version="4.7.0" />
   </ItemGroup>
 
 </Project>

Examples/BlazorClient/Pages/Index.razor

@@ -1,14 +1,16 @@
 @page "/"
+@using Bitstamp.Net.Interfaces.Clients
+@using Bitunix.Net.Interfaces.Clients
 @inject IAsterRestClient asterClient
 @inject IBinanceRestClient binanceClient
 @inject IBingXRestClient bingXClient
 @inject IBitfinexRestClient bitfinexClient
 @inject IBitgetRestClient bitgetClient
-@inject IBitMartRestClient bitmartClient
+@inject IBitstampRestClient bitstampClient
+@inject IBitunixRestClient bitunixClient
 @inject IBloFinRestClient bloFinClient
 @inject IBybitRestClient bybitClient
 @inject ICoinbaseRestClient coinbaseClient
-@inject ICoinExRestClient coinexClient
 @inject ICoinWRestClient coinWClient
 @inject ICryptoComRestClient cryptocomClient
 @inject IDeepCoinRestClient deepCoinClient
@@ -45,11 +47,11 @@
         var bingXTask = bingXClient.SpotApi.ExchangeData.GetTickersAsync("BTC-USDT");
         var bitfinexTask = bitfinexClient.ExchangeApi.ExchangeData.GetTickerAsync("tBTCUSD");
         var bitgetTask = bitgetClient.SpotApiV2.ExchangeData.GetTickersAsync("BTCUSDT");
-        var bitmartTask = bitmartClient.SpotApi.ExchangeData.GetTickerAsync("BTC_USDT");
+        var bitstampTask = bitstampClient.ExchangeApi.ExchangeData.GetTickerAsync("BTCUSDT");
+        var bitunixTask = bitunixClient.SpotApi.ExchangeData.GetLastPriceAsync("BTCUSDT");
         var bloFinTask = bloFinClient.FuturesApi.ExchangeData.GetTickersAsync("BTC-USDT");
         var bybitTask = bybitClient.V5Api.ExchangeData.GetSpotTickersAsync("BTCUSDT");
         var coinbaseTask = coinbaseClient.AdvancedTradeApi.ExchangeData.GetSymbolAsync("BTC-USDT");
-        var coinexTask = coinexClient.SpotApiV2.ExchangeData.GetTickersAsync(["BTCUSDT"]);
         var coinWTask = coinWClient.SpotApi.ExchangeData.GetTickersAsync();
         var cryptocomTask = cryptocomClient.ExchangeApi.ExchangeData.GetTickersAsync("BTC_USDT");
         var deepCoinTask = deepCoinClient.ExchangeApi.ExchangeData.GetTickersAsync(DeepCoin.Net.Enums.SymbolType.Spot);
@@ -69,7 +71,7 @@
         var whitebitTask = whitebitClient.V4Api.ExchangeData.GetTickersAsync();
         var xtTask = xtClient.SpotApi.ExchangeData.GetTickersAsync("btc_usdt");
 
-        await Task.WhenAll(asterTask, binanceTask, bingXTask, bitfinexTask, bitgetTask, bitmartTask, bloFinTask, bybitTask, coinexTask, coinWTask, deepCoinTask, gateioTask, 
+        await Task.WhenAll(asterTask, binanceTask, bingXTask, bitfinexTask, bitgetTask, bitstampTask, bitunixTask, bloFinTask, bybitTask, coinWTask, deepCoinTask, gateioTask,
                            htxTask, krakenTask, kucoinTask, lBankTask, mexcTask, okxTask, pionexTask, toobitTask, upbitTask, weexTask, whitebitTask, xtTask);
 
         if (asterTask.Result.Success)
@@ -87,8 +89,11 @@
         if (bitgetTask.Result.Success)
             _prices.Add("Bitget", bitgetTask.Result.Data.Single().LastPrice);
 
-        if (bitmartTask.Result.Success)
-            _prices.Add("BitMart", bitmartTask.Result.Data.LastPrice);
+        if (bitstampTask.Result.Success)
+            _prices.Add("Bitstamp", bitstampTask.Result.Data.LastPrice);
+
+        if (bitunixTask.Result.Success)
+            _prices.Add("Bitunix", bitunixTask.Result.Data);
 
         if (bloFinTask.Result.Success)
             _prices.Add("BloFin", bloFinTask.Result.Data.First().LastPrice);
@@ -99,9 +104,6 @@
         if (coinbaseTask.Result.Success)
             _prices.Add("Coinbase", coinbaseTask.Result.Data.LastPrice ?? 0);
 
-        if (coinexTask.Result.Success)
-            _prices.Add("CoinEx", coinexTask.Result.Data.Single().LastPrice);
-
         if (coinWTask.Result.Success)
             _prices.Add("CoinW", coinWTask.Result.Data.Single(x => x.Symbol == "BTC_USDT").LastPrice);
 

Examples/BlazorClient/Pages/LiveData.razor

@@ -4,11 +4,11 @@
 @inject IBingXSocketClient bingXSocketClient
 @inject IBitfinexSocketClient bitfinexSocketClient
 @inject IBitgetSocketClient bitgetSocketClient
-@inject IBitMartSocketClient bitmartSocketClient
+@inject IBitstampSocketClient bitstampSocketClient
+@inject IBitunixSocketClient bitunixSocketClient
 @inject IBloFinSocketClient bloFinSocketClient
 @inject IBybitSocketClient bybitSocketClient
 @inject ICoinbaseSocketClient coinbaseSocketClient
-@inject ICoinExSocketClient coinExSocketClient
 @inject ICoinWSocketClient coinWSocketClient
 @inject ICryptoComSocketClient cryptocomSocketClient
 @inject IDeepCoinSocketClient deepCoinSocketClient
@@ -28,6 +28,8 @@
 @inject IWhiteBitSocketClient whitebitSocketClient
 @inject IXTSocketClient xtSocketClient
 @using System.Collections.Concurrent
+@using Bitstamp.Net.Interfaces.Clients
+@using Bitunix.Net.Interfaces.Clients
 @using CryptoExchange.Net.Objects
 @using CryptoExchange.Net.Objects.Sockets;
 @using CryptoExchange.Net.Sockets
@@ -54,11 +56,9 @@
             bingXSocketClient.SpotApi.SubscribeToTickerUpdatesAsync("ETH-BTC", data => UpdateData("BingX", data.Data.LastPrice)),
             bitfinexSocketClient.ExchangeApi.SubscribeToTickerUpdatesAsync("tETHBTC", data => UpdateData("Bitfinex", data.Data.LastPrice)),
             bitgetSocketClient.SpotApiV2.SubscribeToTickerUpdatesAsync("ETHBTC", data => UpdateData("Bitget", data.Data.First().LastPrice)),
-            bitmartSocketClient.SpotApi.SubscribeToTickerUpdatesAsync("ETH_BTC", data => UpdateData("BitMart", data.Data.LastPrice)),
             // BloFin doesn't support the ETH/BTC pair
             //bloFinSocketClient.FuturesApi.SubscribeToTickerUpdatesAsync("ETH-BTC", data => UpdateData("BloFin", data.Data.LastPrice)),
             bybitSocketClient.V5SpotApi.SubscribeToTickerUpdatesAsync("ETHBTC", data => UpdateData("Bybit", data.Data.LastPrice)),
-            coinExSocketClient.SpotApiV2.SubscribeToTickerUpdatesAsync(["ETHBTC"], data => UpdateData("CoinEx", data.Data.First().LastPrice)),
             coinWSocketClient.SpotApi.SubscribeToTickerUpdatesAsync("ETH_BTC", data => UpdateData("CoinW", data.Data.LastPrice)),
             coinbaseSocketClient.AdvancedTradeApi.SubscribeToTickerUpdatesAsync("ETH-BTC", data => UpdateData("Coinbase", data.Data.LastPrice ?? 0)),
             cryptocomSocketClient.ExchangeApi.SubscribeToTickerUpdatesAsync("ETH_BTC", data => UpdateData("CryptoCom", data.Data.LastPrice ?? 0)),

Examples/BlazorClient/Pages/OrderBooks.razor

@@ -6,10 +6,10 @@
 @using BingX.Net.Interfaces
 @using Bitfinex.Net.Interfaces
 @using Bitget.Net.Interfaces;
-@using BitMart.Net.Interfaces;
+@using Bitstamp.Net.Interfaces;
+@using Bitunix.Net.Interfaces;
 @using BloFin.Net.Interfaces;
 @using Bybit.Net.Interfaces
-@using CoinEx.Net.Interfaces
 @using CoinW.Net.Interfaces
 @using Coinbase.Net.Interfaces
 @using CryptoExchange.Net.Authentication
@@ -38,11 +38,11 @@
 @inject IBingXOrderBookFactory bingXFactory
 @inject IBitfinexOrderBookFactory bitfinexFactory
 @inject IBitgetOrderBookFactory bitgetFactory
-@inject IBitMartOrderBookFactory bitmartFactory
+@inject IBitstampOrderBookFactory bitstampFactory
+@inject IBitunixOrderBookFactory bitunixFactory
 @inject IBloFinOrderBookFactory bloFinFactory
 @inject IBybitOrderBookFactory bybitFactory
 @inject ICoinbaseOrderBookFactory coinbaseFactory
-@inject ICoinExOrderBookFactory coinExFactory
 @inject ICoinWOrderBookFactory coinWFactory
 @inject ICryptoComOrderBookFactory cryptocomFactory
 @inject IDeepCoinOrderBookFactory deepCoinFactory
@@ -100,11 +100,11 @@
                 { "BingX", bingXFactory.CreateSpot("ETH-BTC") },
                 { "Bitfinex", bitfinexFactory.Create("tETHBTC") },
                 { "Bitget", bitgetFactory.CreateSpot("ETHBTC") },
-                { "BitMart", bitmartFactory.CreateSpot("ETH_BTC", null) },
+                { "Bitstamp", bitstampFactory.Create("ETHUSDT", null) },
+                { "Bitunix", bitunixFactory.CreateFutures("ETHUSDT", null) },
                 { "BloFin", bloFinFactory.CreateFutures("ETH-USDT") },
                 { "Bybit", bybitFactory.Create("ETHBTC", Bybit.Net.Enums.Category.Spot) },
                 { "Coinbase", coinbaseFactory.Create("ETH-BTC", null) },
-                { "CoinEx", coinExFactory.CreateSpot("ETHBTC") },
                 { "CoinW", coinWFactory.CreateSpot("ETH_BTC") },
                 { "CryptoCom", cryptocomFactory.Create("ETH_BTC") },
                 { "GateIo", gateioFactory.CreateSpot("ETH_BTC") },

Examples/BlazorClient/Pages/Trackers.razor

@@ -6,10 +6,10 @@
 @using BingX.Net.Interfaces
 @using Bitfinex.Net.Interfaces
 @using Bitget.Net.Interfaces;
-@using BitMart.Net.Interfaces;
+@using Bitstamp.Net.Interfaces;
+@using Bitunix.Net.Interfaces;
 @using BloFin.Net.Interfaces
 @using Bybit.Net.Interfaces
-@using CoinEx.Net.Interfaces
 @using CoinW.Net.Interfaces
 @using Coinbase.Net.Interfaces
 @using CryptoExchange.Net.Interfaces
@@ -38,11 +38,11 @@
 @inject IBingXTrackerFactory bingXFactory
 @inject IBitfinexTrackerFactory bitfinexFactory
 @inject IBitgetTrackerFactory bitgetFactory
-@inject IBitMartTrackerFactory bitmartFactory
+@inject IBitstampTrackerFactory bitstampFactory
+@inject IBitunixTrackerFactory bitunixFactory
 @inject IBloFinTrackerFactory bloFinFactory
 @inject IBybitTrackerFactory bybitFactory
 @inject ICoinbaseTrackerFactory coinbaseFactory
-@inject ICoinExTrackerFactory coinExFactory
 @inject ICoinWTrackerFactory coinWFactory
 @inject ICryptoComTrackerFactory cryptocomFactory
 @inject IDeepCoinTrackerFactory deepCoinFactory
@@ -93,11 +93,10 @@
                 { bingXFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
                 { bitfinexFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
                 { bitgetFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
-                { bitmartFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
+                { bitstampFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
                 { bloFinFactory.CreateTradeTracker(futuresSymbol, period: TimeSpan.FromMinutes(5)) },
                 { bybitFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
                 { coinbaseFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
-                { coinExFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
                 { coinWFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
                 { cryptocomFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },
                 { deepCoinFactory.CreateTradeTracker(symbol, period: TimeSpan.FromMinutes(5)) },

Examples/BlazorClient/Startup.cs

@@ -38,11 +38,11 @@ namespace BlazorClient
             services.AddBingX();
             services.AddBitfinex();
             services.AddBitget();
-            services.AddBitMart();
+            services.AddBitstamp();
+            services.AddBitunix();
             services.AddBloFin();
             services.AddBybit();
             services.AddCoinbase();
-            services.AddCoinEx();
             services.AddCoinW();
             services.AddCryptoCom();
             services.AddDeepCoin();

Examples/BlazorClient/_Imports.razor

@@ -13,11 +13,9 @@
 @using BingX.Net.Interfaces.Clients;
 @using Bitfinex.Net.Interfaces.Clients;
 @using Bitget.Net.Interfaces.Clients;
-@using BitMart.Net.Interfaces.Clients;
 @using BloFin.Net.Interfaces.Clients;
 @using Bybit.Net.Interfaces.Clients;
 @using Coinbase.Net.Interfaces.Clients;
-@using CoinEx.Net.Interfaces.Clients;
 @using CoinW.Net.Interfaces.Clients;
 @using CryptoCom.Net.Interfaces.Clients;
 @using DeepCoin.Net.Interfaces.Clients;

README.md

@@ -39,6 +39,7 @@ Full list of all libraries part of the CryptoExchange.Net ecosystem. Consider us
 |![Bitget](https://raw.githubusercontent.com/JKorf/Bitget.Net/refs/heads/main/Bitget.Net/Icon/icon.png)|Bitget|CEX|[JKorf/Bitget.Net](https://github.com/JKorf/Bitget.Net)|[![Nuget version](https://img.shields.io/nuget/v/JK.Bitget.net.svg?style=flat-square)](https://www.nuget.org/packages/JK.Bitget.Net)|[Link](https://partner.bitget.com/bg/1qlf6pj1)|20%|
 |![BitMart](https://raw.githubusercontent.com/JKorf/BitMart.Net/refs/heads/main/BitMart.Net/Icon/icon.png)|BitMart|CEX|[JKorf/BitMart.Net](https://github.com/JKorf/BitMart.Net)|[![Nuget version](https://img.shields.io/nuget/v/BitMart.net.svg?style=flat-square)](https://www.nuget.org/packages/BitMart.Net)|[Link](https://www.bitmart.com/invite/JKorfAPI/en-US)|30%|
 |![Bitstamp](https://raw.githubusercontent.com/JKorf/Bitstamp.Net/refs/heads/main/Bitstamp.Net/Icon/icon.png)|Bitstamp|CEX|[JKorf/Bitstamp.Net](https://github.com/JKorf/Bitstamp.Net)|[![Nuget version](https://img.shields.io/nuget/v/Bitstamp.net.svg?style=flat-square)](https://www.nuget.org/packages/Bitstamp.Net)|-|-|
+|![Bitunix](https://raw.githubusercontent.com/JKorf/Bitunix.Net/refs/heads/main/Bitunix.Net/Icon/icon.png)|Bitunix|CEX|[JKorf/Bitunix.Net](https://github.com/JKorf/Bitunix.Net)|[![Nuget version](https://img.shields.io/nuget/v/Bitunix.net.svg?style=flat-square)](https://www.nuget.org/packages/Bitunix.Net)|-|-|
 |![BloFin](https://raw.githubusercontent.com/JKorf/BloFin.Net/refs/heads/main/BloFin.Net/Icon/icon.png)|BloFin|CEX|[JKorf/BloFin.Net](https://github.com/JKorf/BloFin.Net)|[![Nuget version](https://img.shields.io/nuget/v/BloFin.net.svg?style=flat-square)](https://www.nuget.org/packages/BloFin.Net)|-|-|
 |![Bybit](https://raw.githubusercontent.com/JKorf/Bybit.Net/refs/heads/main/ByBit.Net/Icon/icon.png)|Bybit|CEX|[JKorf/Bybit.Net](https://github.com/JKorf/Bybit.Net)|[![Nuget version](https://img.shields.io/nuget/v/Bybit.net.svg?style=flat-square)](https://www.nuget.org/packages/Bybit.Net)|[Link](https://partner.bybit.com/b/jkorf)|-|
 |![Coinbase](https://raw.githubusercontent.com/JKorf/Coinbase.Net/refs/heads/main/Coinbase.Net/Icon/icon.png)|Coinbase|CEX|[JKorf/Coinbase.Net](https://github.com/JKorf/Coinbase.Net)|[![Nuget version](https://img.shields.io/nuget/v/JKorf.Coinbase.Net.svg?style=flat-square)](https://www.nuget.org/packages/JKorf.Coinbase.Net)|[Link](https://advanced.coinbase.com/join/T6H54H8)|-|
@@ -127,6 +128,28 @@ Various:
   * PlatformInfo now required support environment names in the constructor
 
 ## Release notes
+* Version 13.2.3 - 03 Nov 2026
+    * Added additional constructor for NoApiCredentialsError
+    * Updated test error messages
+    * Fixed some timing issues in WebSocket closing
+
+* Version 13.2.2 - 22 Oct 2026
+    * Fixed UserDataTracker config not getting set correctly
+    * Added UserDataTracker warning for missing tracked symbols if open orders request requires it
+
+* Version 13.2.1 - 19 Oct 2026
+    * Fixed subscription without any predefined routes failing to subscribe
+    * Fixed test validation failing with empty body string
+
+* Version 13.2.0 - 13 Oct 2026
+    * Added Shared API ISubscribeFundingInfoSocket
+    * Added DelayAfterConnect to SocketApiOptions
+    * Added processor parameter for some methods in SocketApiClient to allow specific overriding behavior
+    * Updated WebSocket duplicate subscription handling
+    * Updated Shared APIs ISubscribeIncrementalOrderBook
+    * Fixed incorrect status keeping of WebSocket subscriptions which don't expect a response
+    * Fixed DelayAfterConnect not being respected on reconnection
+
 * Version 13.1.0 - 28 Sep 2026
     * Added UnsubscribeAllAsync method to Shared APIs ISharedSubscription and ISharedApiClientBase
     * Added WaitAllAsync extension method for waiting on an IAsyncEnumerable to finish

llms-full.txt

@@ -1,8 +1,8 @@
 # CryptoExchange.Net — full AI context
 
 Library: CryptoExchange.Net
-Library version: 13.1.0
-CryptoExchange.Net package version: 13.1.0
+Library version: 13.2.2
+CryptoExchange.Net package version: 13.2.2
 Language: C#/.NET
 Targets: netstandard2.0, netstandard2.1, net8.0, net9.0, net10.0
 

llms.txt

@@ -2,7 +2,7 @@
 
 > Base C#/.NET library used by 28+ cryptocurrency exchange clients. It standardizes REST, WebSocket, authentication, rate limiting, results, and exchange-agnostic Shared APIs.
 
-CryptoExchange.Net is not an exchange client by itself. Install exchange-specific packages such as Binance.Net, Bybit.Net, JK.OKX.Net, Kraken.Net, or Coinbase.Net, or install `CryptoClients.Net` for the bundle. Current release: 13.1.0. Targets netstandard2.0, netstandard2.1, net8.0, net9.0, and net10.0; Native AOT is supported.
+CryptoExchange.Net is not an exchange client by itself. Install exchange-specific packages such as Binance.Net, Bybit.Net, JK.OKX.Net, Kraken.Net, or Coinbase.Net, or install `CryptoClients.Net` for the bundle. Current release: 13.2.2. Targets netstandard2.0, netstandard2.1, net8.0, net9.0, and net10.0; Native AOT is supported.
 
 ## Shared API V2