[#13] Client: Use code analyzers

Signed-off-by: Pavel Gross <p.gross@yadro.com>

.editorconfig

@@ -0,0 +1,901 @@
+[*.cs]
+
+# CA1001: Types that own disposable fields should be disposable
+dotnet_diagnostic.CA1001.severity = warning
+
+# CA1000: Do not declare static members on generic types
+dotnet_diagnostic.CA1000.severity = warning
+
+# CA1002: Do not expose generic lists
+dotnet_diagnostic.CA1002.severity = warning
+
+# CA1003: Use generic event handler instances
+dotnet_diagnostic.CA1003.severity = warning
+
+# CA1005: Avoid excessive parameters on generic types
+dotnet_diagnostic.CA1005.severity = warning
+
+# CA1008: Enums should have zero value
+dotnet_diagnostic.CA1008.severity = warning
+
+# CA1010: Generic interface should also be implemented
+dotnet_diagnostic.CA1010.severity = warning
+
+# CA1012: Abstract types should not have public constructors
+dotnet_diagnostic.CA1012.severity = warning
+
+# CA1014: Mark assemblies with CLSCompliant
+dotnet_diagnostic.CA1014.severity = warning
+
+# CA1016: Mark assemblies with assembly version
+dotnet_diagnostic.CA1016.severity = warning
+
+# CA1017: Mark assemblies with ComVisible
+dotnet_diagnostic.CA1017.severity = warning
+
+# CA1018: Mark attributes with AttributeUsageAttribute
+dotnet_diagnostic.CA1018.severity = warning
+
+# CA1019: Define accessors for attribute arguments
+dotnet_diagnostic.CA1019.severity = warning
+
+# CA1021: Avoid out parameters
+dotnet_diagnostic.CA1021.severity = warning
+
+# CA1024: Use properties where appropriate
+dotnet_diagnostic.CA1024.severity = warning
+
+# CA1027: Mark enums with FlagsAttribute
+dotnet_diagnostic.CA1027.severity = warning
+
+# CA1028: Enum Storage should be Int32
+dotnet_diagnostic.CA1028.severity = warning
+
+# CA1030: Use events where appropriate
+dotnet_diagnostic.CA1030.severity = warning
+
+# CA1031: Do not catch general exception types
+dotnet_diagnostic.CA1031.severity = warning
+
+# CA1033: Interface methods should be callable by child types
+dotnet_diagnostic.CA1033.severity = warning
+
+# CA1034: Nested types should not be visible
+dotnet_diagnostic.CA1034.severity = warning
+
+# CA1036: Override methods on comparable types
+dotnet_diagnostic.CA1036.severity = warning
+
+# CA1040: Avoid empty interfaces
+dotnet_diagnostic.CA1040.severity = warning
+
+# CA1041: Provide ObsoleteAttribute message
+dotnet_diagnostic.CA1041.severity = warning
+
+# CA1043: Use Integral Or String Argument For Indexers
+dotnet_diagnostic.CA1043.severity = warning
+
+# CA1044: Properties should not be write only
+dotnet_diagnostic.CA1044.severity = warning
+
+# CA1045: Do not pass types by reference
+dotnet_diagnostic.CA1045.severity = warning
+
+# CA1046: Do not overload equality operator on reference types
+dotnet_diagnostic.CA1046.severity = warning
+
+# CA1050: Declare types in namespaces
+dotnet_diagnostic.CA1050.severity = warning
+
+# CA1051: Do not declare visible instance fields
+dotnet_diagnostic.CA1051.severity = warning
+
+# CA1052: Static holder types should be Static or NotInheritable
+dotnet_diagnostic.CA1052.severity = warning
+
+# CA1054: URI-like parameters should not be strings
+dotnet_diagnostic.CA1054.severity = warning
+
+# CA1055: URI-like return values should not be strings
+dotnet_diagnostic.CA1055.severity = warning
+
+# CA1056: URI-like properties should not be strings
+dotnet_diagnostic.CA1056.severity = warning
+
+# CA1058: Types should not extend certain base types
+dotnet_diagnostic.CA1058.severity = warning
+
+# CA1060: Move pinvokes to native methods class
+dotnet_diagnostic.CA1060.severity = warning
+
+# CA1061: Do not hide base class methods
+dotnet_diagnostic.CA1061.severity = warning
+
+# CA1062: Validate arguments of public methods
+dotnet_diagnostic.CA1062.severity = warning
+
+# CA1063: Implement IDisposable Correctly
+dotnet_diagnostic.CA1063.severity = warning
+
+# CA1064: Exceptions should be public
+dotnet_diagnostic.CA1064.severity = warning
+
+# CA1065: Do not raise exceptions in unexpected locations
+dotnet_diagnostic.CA1065.severity = warning
+
+# CA1066: Implement IEquatable when overriding Object.Equals
+dotnet_diagnostic.CA1066.severity = warning
+
+# CA1067: Override Object.Equals(object) when implementing IEquatable<T>
+dotnet_diagnostic.CA1067.severity = warning
+
+# CA1068: CancellationToken parameters must come last
+dotnet_diagnostic.CA1068.severity = warning
+
+# CA1069: Enums values should not be duplicated
+dotnet_diagnostic.CA1069.severity = warning
+
+# CA1070: Do not declare event fields as virtual
+dotnet_diagnostic.CA1070.severity = warning
+
+# CA1303: Do not pass literals as localized parameters
+dotnet_diagnostic.CA1303.severity = warning
+
+# CA1304: Specify CultureInfo
+dotnet_diagnostic.CA1304.severity = warning
+
+# CA1305: Specify IFormatProvider
+dotnet_diagnostic.CA1305.severity = warning
+
+# CA1307: Specify StringComparison for clarity
+dotnet_diagnostic.CA1307.severity = warning
+
+# CA1308: Normalize strings to uppercase
+dotnet_diagnostic.CA1308.severity = warning
+
+# CA1310: Specify StringComparison for correctness
+dotnet_diagnostic.CA1310.severity = warning
+
+# CA1401: P/Invokes should not be visible
+dotnet_diagnostic.CA1401.severity = warning
+
+# CA1416: Validate platform compatibility
+dotnet_diagnostic.CA1416.severity = warning
+
+# CA1417: Do not use 'OutAttribute' on string parameters for P/Invokes
+dotnet_diagnostic.CA1417.severity = warning
+
+# CA1418: Use valid platform string
+dotnet_diagnostic.CA1418.severity = warning
+
+# CA1419: Provide a parameterless constructor that is as visible as the containing type for concrete types derived from 'System.Runtime.InteropServices.SafeHandle'
+dotnet_diagnostic.CA1419.severity = warning
+
+# CA1420: Property, type, or attribute requires runtime marshalling
+dotnet_diagnostic.CA1420.severity = warning
+
+# CA1421: This method uses runtime marshalling even when the 'DisableRuntimeMarshallingAttribute' is applied
+dotnet_diagnostic.CA1421.severity = warning
+
+# CA1422: Validate platform compatibility
+dotnet_diagnostic.CA1422.severity = warning
+
+# CA1501: Avoid excessive inheritance
+dotnet_diagnostic.CA1501.severity = warning
+
+# CA1502: Avoid excessive complexity
+dotnet_diagnostic.CA1502.severity = warning
+
+# CA1505: Avoid unmaintainable code
+dotnet_diagnostic.CA1505.severity = warning
+
+# CA1506: Avoid excessive class coupling
+# dotnet_diagnostic.CA1506.severity = warning
+
+# CA1509: Invalid entry in code metrics rule specification file
+dotnet_diagnostic.CA1509.severity = warning
+
+# CA1510: Use ArgumentNullException throw helper
+dotnet_diagnostic.CA1510.severity = warning
+
+# CA1511: Use ArgumentException throw helper
+dotnet_diagnostic.CA1511.severity = warning
+
+# CA1512: Use ArgumentOutOfRangeException throw helper
+dotnet_diagnostic.CA1512.severity = warning
+
+# CA1513: Use ObjectDisposedException throw helper
+dotnet_diagnostic.CA1513.severity = warning
+
+# CA1700: Do not name enum values 'Reserved'
+dotnet_diagnostic.CA1700.severity = warning
+
+# CA1707: Identifiers should not contain underscores
+dotnet_diagnostic.CA1707.severity = warning
+
+# CA1708: Identifiers should differ by more than case
+dotnet_diagnostic.CA1708.severity = warning
+
+# CA1710: Identifiers should have correct suffix
+dotnet_diagnostic.CA1710.severity = warning
+
+# CA1711: Identifiers should not have incorrect suffix
+dotnet_diagnostic.CA1711.severity = warning
+
+# CA1712: Do not prefix enum values with type name
+dotnet_diagnostic.CA1712.severity = warning
+
+# CA1713: Events should not have 'Before' or 'After' prefix
+dotnet_diagnostic.CA1713.severity = warning
+
+# CA1715: Identifiers should have correct prefix
+dotnet_diagnostic.CA1715.severity = warning
+
+# CA1716: Identifiers should not match keywords
+dotnet_diagnostic.CA1716.severity = warning
+
+# CA1720: Identifier contains type name
+dotnet_diagnostic.CA1720.severity = warning
+
+# CA1721: Property names should not match get methods
+dotnet_diagnostic.CA1721.severity = warning
+
+# CA1724: Type names should not match namespaces
+dotnet_diagnostic.CA1724.severity = warning
+
+# CA1725: Parameter names should match base declaration
+dotnet_diagnostic.CA1725.severity = warning
+
+# CA1727: Use PascalCase for named placeholders
+dotnet_diagnostic.CA1727.severity = warning
+
+# CA1806: Do not ignore method results
+dotnet_diagnostic.CA1806.severity = warning
+
+# CA1810: Initialize reference type static fields inline
+dotnet_diagnostic.CA1810.severity = warning
+
+# CA1813: Avoid unsealed attributes
+dotnet_diagnostic.CA1813.severity = warning
+
+# CA1814: Prefer jagged arrays over multidimensional
+dotnet_diagnostic.CA1814.severity = warning
+
+# CA1815: Override equals and operator equals on value types
+dotnet_diagnostic.CA1815.severity = warning
+
+# CA1816: Dispose methods should call SuppressFinalize
+dotnet_diagnostic.CA1816.severity = warning
+
+# CA1819: Properties should not return arrays
+# dotnet_diagnostic.CA1819.severity = warning
+
+# CA1820: Test for empty strings using string length
+dotnet_diagnostic.CA1820.severity = warning
+
+# CA1821: Remove empty Finalizers
+dotnet_diagnostic.CA1821.severity = warning
+
+# CA1822: Mark members as static
+dotnet_diagnostic.CA1822.severity = warning
+
+# CA1823: Avoid unused private fields
+dotnet_diagnostic.CA1823.severity = warning
+
+# CA1826: Do not use Enumerable methods on indexable collections
+dotnet_diagnostic.CA1826.severity = warning
+
+# CA1827: Do not use Count() or LongCount() when Any() can be used
+dotnet_diagnostic.CA1827.severity = warning
+
+# CA1828: Do not use CountAsync() or LongCountAsync() when AnyAsync() can be used
+dotnet_diagnostic.CA1828.severity = warning
+
+# CA1829: Use Length/Count property instead of Count() when available
+dotnet_diagnostic.CA1829.severity = warning
+
+# CA1830: Prefer strongly-typed Append and Insert method overloads on StringBuilder
+dotnet_diagnostic.CA1830.severity = warning
+
+# CA1831: Use AsSpan or AsMemory instead of Range-based indexers when appropriate
+dotnet_diagnostic.CA1831.severity = warning
+
+# CA1832: Use AsSpan or AsMemory instead of Range-based indexers when appropriate
+dotnet_diagnostic.CA1832.severity = warning
+
+# CA1833: Use AsSpan or AsMemory instead of Range-based indexers when appropriate
+dotnet_diagnostic.CA1833.severity = warning
+
+# CA1834: Consider using 'StringBuilder.Append(char)' when applicable
+dotnet_diagnostic.CA1834.severity = warning
+
+# CA1835: Prefer the 'Memory'-based overloads for 'ReadAsync' and 'WriteAsync'
+dotnet_diagnostic.CA1835.severity = warning
+
+# CA1836: Prefer IsEmpty over Count
+dotnet_diagnostic.CA1836.severity = warning
+
+# CA1837: Use 'Environment.ProcessId'
+dotnet_diagnostic.CA1837.severity = warning
+
+# CA1838: Avoid 'StringBuilder' parameters for P/Invokes
+dotnet_diagnostic.CA1838.severity = warning
+
+# CA1839: Use 'Environment.ProcessPath'
+dotnet_diagnostic.CA1839.severity = warning
+
+# CA1840: Use 'Environment.CurrentManagedThreadId'
+dotnet_diagnostic.CA1840.severity = warning
+
+# CA1842: Do not use 'WhenAll' with a single task
+dotnet_diagnostic.CA1842.severity = warning
+
+# CA1843: Do not use 'WaitAll' with a single task
+dotnet_diagnostic.CA1843.severity = warning
+
+# CA1844: Provide memory-based overrides of async methods when subclassing 'Stream'
+dotnet_diagnostic.CA1844.severity = warning
+
+# CA1846: Prefer 'AsSpan' over 'Substring'
+dotnet_diagnostic.CA1846.severity = warning
+
+# CA1847: Use char literal for a single character lookup
+dotnet_diagnostic.CA1847.severity = warning
+
+# CA1848: Use the LoggerMessage delegates
+dotnet_diagnostic.CA1848.severity = warning
+
+# CA1849: Call async methods when in an async method
+dotnet_diagnostic.CA1849.severity = warning
+
+# CA1850: Prefer static 'HashData' method over 'ComputeHash'
+dotnet_diagnostic.CA1850.severity = warning
+
+# CA1852: Seal internal types
+dotnet_diagnostic.CA1852.severity = warning
+
+# CA1853: Unnecessary call to 'Dictionary.ContainsKey(key)'
+dotnet_diagnostic.CA1853.severity = warning
+
+# CA1854: Prefer the 'IDictionary.TryGetValue(TKey, out TValue)' method
+dotnet_diagnostic.CA1854.severity = warning
+
+# CA1858: Use 'StartsWith' instead of 'IndexOf'
+dotnet_diagnostic.CA1858.severity = warning
+
+# CA1859: Use concrete types when possible for improved performance
+dotnet_diagnostic.CA1859.severity = warning
+
+# CA1860: Avoid using 'Enumerable.Any()' extension method
+dotnet_diagnostic.CA1860.severity = warning
+
+# CA1861: Avoid constant arrays as arguments
+dotnet_diagnostic.CA1861.severity = warning
+
+# CA1862: Use the 'StringComparison' method overloads to perform case-insensitive string comparisons
+dotnet_diagnostic.CA1862.severity = warning
+
+# CA1863: Use 'CompositeFormat'
+dotnet_diagnostic.CA1863.severity = warning
+
+# CA1864: Prefer the 'IDictionary.TryAdd(TKey, TValue)' method
+dotnet_diagnostic.CA1864.severity = warning
+
+# CA1868: Unnecessary call to 'Contains(item)'
+dotnet_diagnostic.CA1868.severity = warning
+
+# CA1869: Cache and reuse 'JsonSerializerOptions' instances
+dotnet_diagnostic.CA1869.severity = warning
+
+# CA2000: Dispose objects before losing scope
+dotnet_diagnostic.CA2000.severity = warning
+
+# CA2002: Do not lock on objects with weak identity
+dotnet_diagnostic.CA2002.severity = warning
+
+# CA2007: Consider calling ConfigureAwait on the awaited task
+dotnet_diagnostic.CA2007.severity = warning
+
+# CA2008: Do not create tasks without passing a TaskScheduler
+dotnet_diagnostic.CA2008.severity = warning
+
+# CA2009: Do not call ToImmutableCollection on an ImmutableCollection value
+dotnet_diagnostic.CA2009.severity = warning
+
+# CA2011: Avoid infinite recursion
+dotnet_diagnostic.CA2011.severity = warning
+
+# CA2012: Use ValueTasks correctly
+dotnet_diagnostic.CA2012.severity = warning
+
+# CA2013: Do not use ReferenceEquals with value types
+dotnet_diagnostic.CA2013.severity = warning
+
+# CA2015: Do not define finalizers for types derived from MemoryManager<T>
+dotnet_diagnostic.CA2015.severity = warning
+
+# CA2017: Parameter count mismatch
+dotnet_diagnostic.CA2017.severity = warning
+
+# CA2018: 'Buffer.BlockCopy' expects the number of bytes to be copied for the 'count' argument
+dotnet_diagnostic.CA2018.severity = warning
+
+# CA2019: Improper 'ThreadStatic' field initialization
+dotnet_diagnostic.CA2019.severity = warning
+
+# CA2021: Do not call Enumerable.Cast<T> or Enumerable.OfType<T> with incompatible types
+dotnet_diagnostic.CA2021.severity = warning
+
+# CA2100: Review SQL queries for security vulnerabilities
+dotnet_diagnostic.CA2100.severity = warning
+
+# CA2101: Specify marshaling for P/Invoke string arguments
+dotnet_diagnostic.CA2101.severity = warning
+
+# CA2119: Seal methods that satisfy private interfaces
+dotnet_diagnostic.CA2119.severity = warning
+
+# CA2153: Do Not Catch Corrupted State Exceptions
+dotnet_diagnostic.CA2153.severity = warning
+
+# CA2200: Rethrow to preserve stack details
+dotnet_diagnostic.CA2200.severity = warning
+
+# CA2201: Do not raise reserved exception types
+dotnet_diagnostic.CA2201.severity = warning
+
+# CA2207: Initialize value type static fields inline
+dotnet_diagnostic.CA2207.severity = warning
+
+# CA2208: Instantiate argument exceptions correctly
+dotnet_diagnostic.CA2208.severity = warning
+
+# CA2211: Non-constant fields should not be visible
+dotnet_diagnostic.CA2211.severity = warning
+
+# CA2213: Disposable fields should be disposed
+dotnet_diagnostic.CA2213.severity = warning
+
+# CA2214: Do not call overridable methods in constructors
+dotnet_diagnostic.CA2214.severity = warning
+
+# CA2215: Dispose methods should call base class dispose
+dotnet_diagnostic.CA2215.severity = warning
+
+# CA2216: Disposable types should declare finalizer
+dotnet_diagnostic.CA2216.severity = warning
+
+# CA2217: Do not mark enums with FlagsAttribute
+dotnet_diagnostic.CA2217.severity = warning
+
+# CA2219: Do not raise exceptions in finally clauses
+dotnet_diagnostic.CA2219.severity = warning
+
+# CA2225: Operator overloads have named alternates
+dotnet_diagnostic.CA2225.severity = warning
+
+# CA2226: Operators should have symmetrical overloads
+dotnet_diagnostic.CA2226.severity = warning
+
+# CA2227: Collection properties should be read only
+dotnet_diagnostic.CA2227.severity = warning
+
+# CA2231: Overload operator equals on overriding value type Equals
+dotnet_diagnostic.CA2231.severity = warning
+
+# CA2235: Mark all non-serializable fields
+dotnet_diagnostic.CA2235.severity = warning
+
+# CA2237: Mark ISerializable types with serializable
+dotnet_diagnostic.CA2237.severity = warning
+
+# CA2241: Provide correct arguments to formatting methods
+dotnet_diagnostic.CA2241.severity = warning
+
+# CA2242: Test for NaN correctly
+dotnet_diagnostic.CA2242.severity = warning
+
+# CA2243: Attribute string literals should parse correctly
+dotnet_diagnostic.CA2243.severity = warning
+
+# CA2244: Do not duplicate indexed element initializations
+dotnet_diagnostic.CA2244.severity = warning
+
+# CA2245: Do not assign a property to itself
+dotnet_diagnostic.CA2245.severity = warning
+
+# CA2246: Assigning symbol and its member in the same statement
+dotnet_diagnostic.CA2246.severity = warning
+
+# CA2247: Argument passed to TaskCompletionSource constructor should be TaskCreationOptions enum instead of TaskContinuationOptions enum
+dotnet_diagnostic.CA2247.severity = warning
+
+# CA2248: Provide correct 'enum' argument to 'Enum.HasFlag'
+dotnet_diagnostic.CA2248.severity = warning
+
+# CA2249: Consider using 'string.Contains' instead of 'string.IndexOf'
+dotnet_diagnostic.CA2249.severity = warning
+
+# CA2250: Use 'ThrowIfCancellationRequested'
+dotnet_diagnostic.CA2250.severity = warning
+
+# CA2251: Use 'string.Equals'
+dotnet_diagnostic.CA2251.severity = warning
+
+# CA2253: Named placeholders should not be numeric values
+dotnet_diagnostic.CA2253.severity = warning
+
+# CA2254: Template should be a static expression
+dotnet_diagnostic.CA2254.severity = warning
+
+# CA2255: The 'ModuleInitializer' attribute should not be used in libraries
+dotnet_diagnostic.CA2255.severity = warning
+
+# CA2256: All members declared in parent interfaces must have an implementation in a DynamicInterfaceCastableImplementation-attributed interface
+dotnet_diagnostic.CA2256.severity = warning
+
+# CA2257: Members defined on an interface with the 'DynamicInterfaceCastableImplementationAttribute' should be 'static'
+dotnet_diagnostic.CA2257.severity = warning
+
+# CA2258: Providing a 'DynamicInterfaceCastableImplementation' interface in Visual Basic is unsupported
+dotnet_diagnostic.CA2258.severity = warning
+
+# CA2259: 'ThreadStatic' only affects static fields
+dotnet_diagnostic.CA2259.severity = warning
+
+# CA2261: Do not use ConfigureAwaitOptions.SuppressThrowing with Task<TResult>
+dotnet_diagnostic.CA2261.severity = warning
+
+# CA2300: Do not use insecure deserializer BinaryFormatter
+dotnet_diagnostic.CA2300.severity = warning
+
+# CA2301: Do not call BinaryFormatter.Deserialize without first setting BinaryFormatter.Binder
+dotnet_diagnostic.CA2301.severity = warning
+
+# CA2302: Ensure BinaryFormatter.Binder is set before calling BinaryFormatter.Deserialize
+dotnet_diagnostic.CA2302.severity = warning
+
+# CA2305: Do not use insecure deserializer LosFormatter
+dotnet_diagnostic.CA2305.severity = warning
+
+# CA2310: Do not use insecure deserializer NetDataContractSerializer
+dotnet_diagnostic.CA2310.severity = warning
+
+# CA2311: Do not deserialize without first setting NetDataContractSerializer.Binder
+dotnet_diagnostic.CA2311.severity = warning
+
+# CA2312: Ensure NetDataContractSerializer.Binder is set before deserializing
+dotnet_diagnostic.CA2312.severity = warning
+
+# CA2315: Do not use insecure deserializer ObjectStateFormatter
+dotnet_diagnostic.CA2315.severity = warning
+
+# CA2321: Do not deserialize with JavaScriptSerializer using a SimpleTypeResolver
+dotnet_diagnostic.CA2321.severity = warning
+
+# CA2322: Ensure JavaScriptSerializer is not initialized with SimpleTypeResolver before deserializing
+dotnet_diagnostic.CA2322.severity = warning
+
+# CA2326: Do not use TypeNameHandling values other than None
+dotnet_diagnostic.CA2326.severity = warning
+
+# CA2327: Do not use insecure JsonSerializerSettings
+dotnet_diagnostic.CA2327.severity = warning
+
+# CA2328: Ensure that JsonSerializerSettings are secure
+dotnet_diagnostic.CA2328.severity = warning
+
+# CA2329: Do not deserialize with JsonSerializer using an insecure configuration
+dotnet_diagnostic.CA2329.severity = warning
+
+# CA2330: Ensure that JsonSerializer has a secure configuration when deserializing
+dotnet_diagnostic.CA2330.severity = warning
+
+# CA2350: Do not use DataTable.ReadXml() with untrusted data
+dotnet_diagnostic.CA2350.severity = warning
+
+# CA2351: Do not use DataSet.ReadXml() with untrusted data
+dotnet_diagnostic.CA2351.severity = warning
+
+# CA2361: Ensure auto-generated class containing DataSet.ReadXml() is not used with untrusted data
+dotnet_diagnostic.CA2361.severity = warning
+
+# CA3001: Review code for SQL injection vulnerabilities
+dotnet_diagnostic.CA3001.severity = warning
+
+# CA3002: Review code for XSS vulnerabilities
+dotnet_diagnostic.CA3002.severity = warning
+
+# CA3003: Review code for file path injection vulnerabilities
+dotnet_diagnostic.CA3003.severity = warning
+
+# CA3004: Review code for information disclosure vulnerabilities
+dotnet_diagnostic.CA3004.severity = warning
+
+# CA3005: Review code for LDAP injection vulnerabilities
+dotnet_diagnostic.CA3005.severity = warning
+
+# CA3006: Review code for process command injection vulnerabilities
+dotnet_diagnostic.CA3006.severity = warning
+
+# CA3007: Review code for open redirect vulnerabilities
+dotnet_diagnostic.CA3007.severity = warning
+
+# CA3008: Review code for XPath injection vulnerabilities
+dotnet_diagnostic.CA3008.severity = warning
+
+# CA3009: Review code for XML injection vulnerabilities
+dotnet_diagnostic.CA3009.severity = warning
+
+# CA3010: Review code for XAML injection vulnerabilities
+dotnet_diagnostic.CA3010.severity = warning
+
+# CA3011: Review code for DLL injection vulnerabilities
+dotnet_diagnostic.CA3011.severity = warning
+
+# CA3012: Review code for regex injection vulnerabilities
+dotnet_diagnostic.CA3012.severity = warning
+
+# CA3061: Do Not Add Schema By URL
+dotnet_diagnostic.CA3061.severity = warning
+
+# CA3075: Insecure DTD processing in XML
+dotnet_diagnostic.CA3075.severity = warning
+
+# CA3076: Insecure XSLT script processing
+dotnet_diagnostic.CA3076.severity = warning
+
+# CA3077: Insecure Processing in API Design, XmlDocument and XmlTextReader
+dotnet_diagnostic.CA3077.severity = warning
+
+# CA3147: Mark Verb Handlers With Validate Antiforgery Token
+dotnet_diagnostic.CA3147.severity = warning
+
+# CA5350: Do Not Use Weak Cryptographic Algorithms
+dotnet_diagnostic.CA5350.severity = warning
+
+# CA5351: Do Not Use Broken Cryptographic Algorithms
+dotnet_diagnostic.CA5351.severity = warning
+
+# CA5358: Review cipher mode usage with cryptography experts
+dotnet_diagnostic.CA5358.severity = warning
+
+# CA5359: Do Not Disable Certificate Validation
+dotnet_diagnostic.CA5359.severity = warning
+
+# CA5360: Do Not Call Dangerous Methods In Deserialization
+dotnet_diagnostic.CA5360.severity = warning
+
+# CA5361: Do Not Disable SChannel Use of Strong Crypto
+dotnet_diagnostic.CA5361.severity = warning
+
+# CA5362: Potential reference cycle in deserialized object graph
+dotnet_diagnostic.CA5362.severity = warning
+
+# CA5363: Do Not Disable Request Validation
+dotnet_diagnostic.CA5363.severity = warning
+
+# CA5364: Do Not Use Deprecated Security Protocols
+dotnet_diagnostic.CA5364.severity = warning
+
+# CA5365: Do Not Disable HTTP Header Checking
+dotnet_diagnostic.CA5365.severity = warning
+
+# CA5366: Use XmlReader for 'DataSet.ReadXml()'
+dotnet_diagnostic.CA5366.severity = warning
+
+# CA5367: Do Not Serialize Types With Pointer Fields
+dotnet_diagnostic.CA5367.severity = warning
+
+# CA5368: Set ViewStateUserKey For Classes Derived From Page
+dotnet_diagnostic.CA5368.severity = warning
+
+# CA5369: Use XmlReader for 'XmlSerializer.Deserialize()'
+dotnet_diagnostic.CA5369.severity = warning
+
+# CA5370: Use XmlReader for XmlValidatingReader constructor
+dotnet_diagnostic.CA5370.severity = warning
+
+# CA5371: Use XmlReader for 'XmlSchema.Read()'
+dotnet_diagnostic.CA5371.severity = warning
+
+# CA5372: Use XmlReader for XPathDocument constructor
+dotnet_diagnostic.CA5372.severity = warning
+
+# CA5373: Do not use obsolete key derivation function
+dotnet_diagnostic.CA5373.severity = warning
+
+# CA5374: Do Not Use XslTransform
+dotnet_diagnostic.CA5374.severity = warning
+
+# CA5375: Do Not Use Account Shared Access Signature
+dotnet_diagnostic.CA5375.severity = warning
+
+# CA5376: Use SharedAccessProtocol HttpsOnly
+dotnet_diagnostic.CA5376.severity = warning
+
+# CA5377: Use Container Level Access Policy
+dotnet_diagnostic.CA5377.severity = warning
+
+# CA5378: Do not disable ServicePointManagerSecurityProtocols
+dotnet_diagnostic.CA5378.severity = warning
+
+# CA5379: Ensure Key Derivation Function algorithm is sufficiently strong
+dotnet_diagnostic.CA5379.severity = warning
+
+# CA5380: Do Not Add Certificates To Root Store
+dotnet_diagnostic.CA5380.severity = warning
+
+# CA5381: Ensure Certificates Are Not Added To Root Store
+dotnet_diagnostic.CA5381.severity = warning
+
+# CA5382: Use Secure Cookies In ASP.NET Core
+dotnet_diagnostic.CA5382.severity = warning
+
+# CA5383: Ensure Use Secure Cookies In ASP.NET Core
+dotnet_diagnostic.CA5383.severity = warning
+
+# CA5384: Do Not Use Digital Signature Algorithm (DSA)
+dotnet_diagnostic.CA5384.severity = warning
+
+# CA5385: Use Rivest-Shamir-Adleman (RSA) Algorithm With Sufficient Key Size
+dotnet_diagnostic.CA5385.severity = warning
+
+# CA5386: Avoid hardcoding SecurityProtocolType value
+dotnet_diagnostic.CA5386.severity = warning
+
+# CA5387: Do Not Use Weak Key Derivation Function With Insufficient Iteration Count
+dotnet_diagnostic.CA5387.severity = warning
+
+# CA5388: Ensure Sufficient Iteration Count When Using Weak Key Derivation Function
+dotnet_diagnostic.CA5388.severity = warning
+
+# CA5389: Do Not Add Archive Item's Path To The Target File System Path
+dotnet_diagnostic.CA5389.severity = warning
+
+# CA5390: Do not hard-code encryption key
+dotnet_diagnostic.CA5390.severity = warning
+
+# CA5391: Use antiforgery tokens in ASP.NET Core MVC controllers
+dotnet_diagnostic.CA5391.severity = warning
+
+# CA5392: Use DefaultDllImportSearchPaths attribute for P/Invokes
+dotnet_diagnostic.CA5392.severity = warning
+
+# CA5393: Do not use unsafe DllImportSearchPath value
+dotnet_diagnostic.CA5393.severity = warning
+
+# CA5394: Do not use insecure randomness
+dotnet_diagnostic.CA5394.severity = warning
+
+# CA5395: Miss HttpVerb attribute for action methods
+dotnet_diagnostic.CA5395.severity = warning
+
+# CA5396: Set HttpOnly to true for HttpCookie
+dotnet_diagnostic.CA5396.severity = warning
+
+# CA5397: Do not use deprecated SslProtocols values
+dotnet_diagnostic.CA5397.severity = warning
+
+# CA5398: Avoid hardcoded SslProtocols values
+dotnet_diagnostic.CA5398.severity = warning
+
+# CA5399: HttpClients should enable certificate revocation list checks
+dotnet_diagnostic.CA5399.severity = warning
+
+# CA5400: Ensure HttpClient certificate revocation list check is not disabled
+dotnet_diagnostic.CA5400.severity = warning
+
+# CA5401: Do not use CreateEncryptor with non-default IV
+dotnet_diagnostic.CA5401.severity = warning
+
+# CA5402: Use CreateEncryptor with the default IV 
+dotnet_diagnostic.CA5402.severity = warning
+
+# CA5403: Do not hard-code certificate
+dotnet_diagnostic.CA5403.severity = warning
+
+# CA5404: Do not disable token validation checks
+dotnet_diagnostic.CA5404.severity = warning
+
+# CA5405: Do not always skip token validation in delegates
+dotnet_diagnostic.CA5405.severity = warning
+
+# CA1032: Implement standard exception constructors
+dotnet_diagnostic.CA1032.severity = warning
+
+# CA1200: Avoid using cref tags with a prefix
+dotnet_diagnostic.CA1200.severity = warning
+
+# CA1309: Use ordinal string comparison
+dotnet_diagnostic.CA1309.severity = warning
+
+# CA1311: Specify a culture or use an invariant version
+dotnet_diagnostic.CA1311.severity = warning
+
+# CA1507: Use nameof to express symbol names
+dotnet_diagnostic.CA1507.severity = warning
+
+# CA1508: Avoid dead conditional code
+dotnet_diagnostic.CA1508.severity = warning
+
+# CA1802: Use literals where appropriate
+dotnet_diagnostic.CA1802.severity = warning
+
+# CA1805: Do not initialize unnecessarily
+dotnet_diagnostic.CA1805.severity = warning
+
+# CA1812: Avoid uninstantiated internal classes
+dotnet_diagnostic.CA1812.severity = warning
+
+# CA1824: Mark assemblies with NeutralResourcesLanguageAttribute
+dotnet_diagnostic.CA1824.severity = warning
+
+# CA1825: Avoid zero-length array allocations
+dotnet_diagnostic.CA1825.severity = warning
+
+# CA1841: Prefer Dictionary.Contains methods
+dotnet_diagnostic.CA1841.severity = warning
+
+# CA1845: Use span-based 'string.Concat'
+dotnet_diagnostic.CA1845.severity = warning
+
+# CA1851: Possible multiple enumerations of 'IEnumerable' collection
+dotnet_diagnostic.CA1851.severity = warning
+
+# CA1855: Prefer 'Clear' over 'Fill'
+dotnet_diagnostic.CA1855.severity = warning
+
+# CA1856: Incorrect usage of ConstantExpected attribute
+dotnet_diagnostic.CA1856.severity = warning
+
+# CA1857: A constant is expected for the parameter
+dotnet_diagnostic.CA1857.severity = warning
+
+# CA1865: Use char overload
+dotnet_diagnostic.CA1865.severity = warning
+
+# CA1866: Use char overload
+dotnet_diagnostic.CA1866.severity = warning
+
+# CA1867: Use char overload
+dotnet_diagnostic.CA1867.severity = warning
+
+# CA1870: Use a cached 'SearchValues' instance
+dotnet_diagnostic.CA1870.severity = warning
+
+# CA2014: Do not use stackalloc in loops
+dotnet_diagnostic.CA2014.severity = warning
+
+# CA2016: Forward the 'CancellationToken' parameter to methods
+dotnet_diagnostic.CA2016.severity = warning
+
+# CA2020: Prevent behavioral change
+dotnet_diagnostic.CA2020.severity = warning
+
+# CA2234: Pass system uri objects instead of strings
+dotnet_diagnostic.CA2234.severity = warning
+
+# CA2252: This API requires opting into preview features
+dotnet_diagnostic.CA2252.severity = warning
+
+# CA2260: Use correct type parameter
+dotnet_diagnostic.CA2260.severity = warning
+
+# CA2352: Unsafe DataSet or DataTable in serializable type can be vulnerable to remote code execution attacks
+dotnet_diagnostic.CA2352.severity = warning
+
+# CA2353: Unsafe DataSet or DataTable in serializable type
+dotnet_diagnostic.CA2353.severity = warning
+
+# CA2354: Unsafe DataSet or DataTable in deserialized object graph can be vulnerable to remote code execution attacks
+dotnet_diagnostic.CA2354.severity = warning
+
+# CA2355: Unsafe DataSet or DataTable type found in deserializable object graph
+dotnet_diagnostic.CA2355.severity = warning
+
+# CA2356: Unsafe DataSet or DataTable type in web deserializable object graph
+dotnet_diagnostic.CA2356.severity = warning
+
+# CA2362: Unsafe DataSet or DataTable in auto-generated serializable type can be vulnerable to remote code execution attacks
+dotnet_diagnostic.CA2362.severity = warning

FrostFS.SDK.sln

@@ -1,6 +1,8 @@
 
-Microsoft Visual Studio Solution File, Format Version 12.00
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
 VisualStudioVersion = 17.5.002.0
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FrostFS.SDK.ClientV2", "src\FrostFS.SDK.ClientV2\FrostFS.SDK.ClientV2.csproj", "{50D8F61F-C302-4AC9-8D8A-AB0B8C0988C3}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FrostFS.SDK.Cryptography", "src\FrostFS.SDK.Cryptography\FrostFS.SDK.Cryptography.csproj", "{3D804F4A-B0B2-47A5-B006-BE447BE64B50}"
@@ -9,6 +11,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FrostFS.SDK.ProtosV2", "src
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "FrostFS.SDK.Tests", "src\FrostFS.SDK.Tests\FrostFS.SDK.Tests.csproj", "{8FDA7E0D-9C75-4874-988E-6592CD28F76C}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{2F030ACD-F87C-4E83-9A68-4CC5DF03AD90}"
+	ProjectSection(SolutionItems) = preProject
+		.editorconfig = .editorconfig
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -32,4 +39,7 @@ Global
 		{8FDA7E0D-9C75-4874-988E-6592CD28F76C}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{8FDA7E0D-9C75-4874-988E-6592CD28F76C}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
 EndGlobal

src/FrostFS.SDK.ClientV2/Exceptions/FrostFsException.cs

@@ -0,0 +1,18 @@
+using System;
+
+namespace FrostFS.SDK.ClientV2;
+
+public class FrostFsException : Exception
+{
+    public FrostFsException()
+    {
+    }
+
+    public FrostFsException(string message) : base(message)
+    {
+    }
+
+    public FrostFsException(string message, Exception innerException) : base(message, innerException)
+    {
+    }
+}

src/FrostFS.SDK.ClientV2/Exceptions/InvalidObjectException.cs

@@ -2,6 +2,17 @@ using System;
 
 namespace FrostFS.SDK.ClientV2;
 
-public class InvalidObjectException() : Exception()
+public class InvalidObjectException : Exception
 {
+    public InvalidObjectException()
+    {
+    }
+
+    public InvalidObjectException(string message) : base(message)
+    {
+    }
+
+    public InvalidObjectException(string message, Exception innerException) : base(message, innerException)
+    {
+    }
 }

src/FrostFS.SDK.ClientV2/Exceptions/ResponseException.cs

@@ -2,7 +2,24 @@ using System;
 
 namespace FrostFS.SDK.ClientV2;
 
-public class ResponseException(FrostFsResponseStatus status) : Exception()
+public class ResponseException : Exception
 {
-    public FrostFsResponseStatus Status { get; set; } = status;
+    public FrostFsResponseStatus? Status { get; private set; }
+
+    public ResponseException()
+    {
+    }
+
+    public ResponseException(FrostFsResponseStatus status)
+    {
+        Status = status;
+    }
+
+    public ResponseException(string message) : base(message)
+    {
+    }
+
+    public ResponseException(string message, Exception innerException) : base(message, innerException)
+    {
+    }
 }

src/FrostFS.SDK.ClientV2/FrostFS.SDK.ClientV2.csproj

@@ -4,14 +4,23 @@
     <TargetFramework>netstandard2.0</TargetFramework>
     <LangVersion>12.0</LangVersion>
     <Nullable>enable</Nullable>
+	<AnalysisMode>AllEnabledByDefault</AnalysisMode>
   </PropertyGroup>
 
-	<PropertyGroup>
+  <PropertyGroup>
-		<EnableNETAnalyzers>true</EnableNETAnalyzers>
+	<EnableNETAnalyzers>true</EnableNETAnalyzers>
-	</PropertyGroup>
+  </PropertyGroup>
+
+  <PropertyGroup>
+	<CodeAnalysisTreatWarningsAsErrors>true</CodeAnalysisTreatWarningsAsErrors>
+  </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="8.0.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Options" Version="8.0.2" />

src/FrostFS.SDK.ClientV2/FrostFSClient.cs

@@ -3,6 +3,9 @@ using System.Collections.Generic;
 using System.Net.Http;
 using System.Threading.Tasks;
 
+using Frostfs.V2.Ape;
+using Frostfs.V2.Apemanager;
+
 using FrostFS.Container;
 using FrostFS.Netmap;
 using FrostFS.Object;
@@ -15,12 +18,10 @@ using Grpc.Core.Interceptors;
 using Grpc.Net.Client;
 
 using Microsoft.Extensions.Options;
-using Frostfs.V2.Apemanager;
-using Frostfs.V2.Ape;
 
 namespace FrostFS.SDK.ClientV2;
 
-public class Client : IFrostFSClient
+public class FrostFSClient : IFrostFSClient
 {
     private bool isDisposed;
 
@@ -38,12 +39,12 @@ public class Client : IFrostFSClient
 
     public static IFrostFSClient GetInstance(IOptions<ClientSettings> clientOptions, GrpcChannelOptions? channelOptions = null)
     {
-        return new Client(clientOptions, channelOptions);
+        return new FrostFSClient(clientOptions, channelOptions);
     }
 
     public static IFrostFSClient GetSingleOwnerInstance(IOptions<SingleOwnerClientSettings> clientOptions, GrpcChannelOptions? channelOptions = null)
     {
-        return new Client(clientOptions, channelOptions);
+        return new FrostFSClient(clientOptions, channelOptions);
     }
 
     /// <summary>
@@ -64,10 +65,15 @@ public class Client : IFrostFSClient
         ContainerService.ContainerServiceClient containerService,
         ObjectService.ObjectServiceClient objectService)
     {
-        return new Client(clientOptions, channelOptions, containerService, netmapService, sessionService, objectService);
+        if (clientOptions is null)
+        {
+            throw new ArgumentNullException(nameof(clientOptions));
+        }
+
+        return new FrostFSClient(clientOptions, channelOptions, containerService, netmapService, sessionService, objectService);
     }
 
-    private Client(
+    private FrostFSClient(
       IOptions<SingleOwnerClientSettings> settings,
       GrpcChannelOptions? channelOptions,
       ContainerService.ContainerServiceClient containerService,
@@ -75,6 +81,11 @@ public class Client : IFrostFSClient
       SessionService.SessionServiceClient sessionService,
       ObjectService.ObjectServiceClient objectService)
     {
+        if (settings is null)
+        {
+            throw new ArgumentNullException(nameof(settings));
+        }
+
         var ecdsaKey = settings.Value.Key.LoadWif();
         FrostFsOwner.FromKey(ecdsaKey);
 
@@ -85,13 +96,13 @@ public class Client : IFrostFSClient
            channel: InitGrpcChannel(settings.Value.Host, channelOptions),
            version: new FrostFsVersion(2, 13));
 
-        ContainerServiceClient = containerService;
+        ContainerServiceClient = containerService ?? throw new ArgumentNullException(nameof(containerService));
-        NetmapServiceClient = netmapService;
+        NetmapServiceClient = netmapService ?? throw new ArgumentNullException(nameof(netmapService));
-        SessionServiceClient = sessionService;
+        SessionServiceClient = sessionService ?? throw new ArgumentNullException(nameof(sessionService));
-        ObjectServiceClient = objectService;
+        ObjectServiceClient = objectService ?? throw new ArgumentNullException(nameof(objectService));
     }
 
-    private Client(IOptions<ClientSettings> options, GrpcChannelOptions? channelOptions)
+    private FrostFSClient(IOptions<ClientSettings> options, GrpcChannelOptions? channelOptions)
     {
         var clientSettings = (options?.Value) ?? throw new ArgumentException("Options must be initialized");
 
@@ -110,7 +121,7 @@ public class Client : IFrostFSClient
         // CheckFrostFsVersionSupport(new Context { Timeout = TimeSpan.FromSeconds(20) });
     }
 
-    private Client(IOptions<SingleOwnerClientSettings> options, GrpcChannelOptions? channelOptions)
+    private FrostFSClient(IOptions<SingleOwnerClientSettings> options, GrpcChannelOptions? channelOptions)
     {
         var clientSettings = (options?.Value) ?? throw new ArgumentException("Options must be initialized");
 
@@ -128,7 +139,7 @@ public class Client : IFrostFSClient
             version: new FrostFsVersion(2, 13));
 
         // TODO: define timeout logic
-        CheckFrostFsVersionSupport(new Context { Timeout = TimeSpan.FromSeconds(20)});
+        // CheckFrostFsVersionSupport(new Context { Timeout = TimeSpan.FromSeconds(20) });
     }
 
     public void Dispose()
@@ -149,18 +160,31 @@ public class Client : IFrostFSClient
     #region ApeManagerImplementation
     public Task<byte[]> AddChainAsync(PrmApeChainAdd args)
     {
+        if (args is null)
+        {
+            throw new ArgumentNullException(nameof(args));
+        }
+
         var service = GetApeManagerService(args);
         return service.AddChainAsync(args);
     }
 
     public Task RemoveChainAsync(PrmApeChainRemove args)
     {
+        if (args is null)
+        {
+            throw new ArgumentNullException(nameof(args));
+        }
+
         var service = GetApeManagerService(args);
         return service.RemoveChainAsync(args);
     }
 
     public Task<Chain[]> ListChainAsync(PrmApeChainList args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetApeManagerService(args);
         return service.ListChainAsync(args);
     }
@@ -169,6 +193,9 @@ public class Client : IFrostFSClient
     #region ContainerImplementation
     public Task<FrostFsContainerInfo> GetContainerAsync(PrmContainerGet args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetContainerService(args);
         return service.GetContainerAsync(args);
     }
@@ -182,12 +209,18 @@ public class Client : IFrostFSClient
 
     public Task<FrostFsContainerId> CreateContainerAsync(PrmContainerCreate args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetContainerService(args);
         return service.CreateContainerAsync(args);
     }
 
     public Task DeleteContainerAsync(PrmContainerDelete args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetContainerService(args);
         return service.DeleteContainerAsync(args);
     }
@@ -219,36 +252,54 @@ public class Client : IFrostFSClient
     #region ObjectImplementation
     public Task<FrostFsObjectHeader> GetObjectHeadAsync(PrmObjectHeadGet args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetObjectService(args);
         return service.GetObjectHeadAsync(args);
     }
 
     public Task<FrostFsObject> GetObjectAsync(PrmObjectGet args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetObjectService(args);
         return service.GetObjectAsync(args);
     }
 
     public Task<FrostFsObjectId> PutObjectAsync(PrmObjectPut args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetObjectService(args);
         return service.PutObjectAsync(args);
     }
 
     public Task<FrostFsObjectId> PutSingleObjectAsync(PrmSingleObjectPut args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetObjectService(args);
         return service.PutSingleObjectAsync(args);
     }
 
     public Task DeleteObjectAsync(PrmObjectDelete args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetObjectService(args);
         return service.DeleteObjectAsync(args);
     }
 
     public IAsyncEnumerable<FrostFsObjectId> SearchObjectsAsync(PrmObjectSearch args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetObjectService(args);
         return service.SearchObjectsAsync(args);
     }
@@ -257,14 +308,20 @@ public class Client : IFrostFSClient
     #region SessionImplementation
     public async Task<FrostFsSessionToken> CreateSessionAsync(PrmSessionCreate args)
     {
-        var session = await CreateSessionInternalAsync(args);
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
+        var session = await CreateSessionInternalAsync(args).ConfigureAwait(false);
         var token = session.Serialize();
 
         return new FrostFsSessionToken(token);
     }
 
-    internal Task<Session.SessionToken> CreateSessionInternalAsync(PrmSessionCreate args)
+    internal Task<SessionToken> CreateSessionInternalAsync(PrmSessionCreate args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         var service = GetSessionService(args);
         return service.CreateSessionAsync(args);
     }
@@ -283,20 +340,24 @@ public class Client : IFrostFSClient
     private async void CheckFrostFsVersionSupport(Context? ctx = default)
     {
         var args = new PrmNodeInfo { Context = ctx };
-        var service = GetNetmapService(args);
-        var localNodeInfo = await service.GetLocalNodeInfoAsync(args);
 
-        if (!localNodeInfo.Version.IsSupported(args.Context!.Version))
+        if (ctx?.Version == null)
+            throw new InvalidObjectException(nameof(ctx.Version));
+
+        var service = GetNetmapService(args);
+        var localNodeInfo = await service.GetLocalNodeInfoAsync(args).ConfigureAwait(false);
+
+        if (!localNodeInfo.Version.IsSupported(ctx.Version))
         {
             var msg = $"FrostFS {localNodeInfo.Version} is not supported.";
-            throw new ApplicationException(msg);
+            throw new FrostFsException(msg);
         }
     }
 
     private CallInvoker? SetupEnvironment(IContext ctx)
     {
         if (isDisposed)
-            throw new Exception("Client is disposed.");
+            throw new InvalidObjectException("Client is disposed.");
 
         ctx.Context ??= new Context();
 
@@ -304,7 +365,7 @@ public class Client : IFrostFSClient
         {
             if (ClientCtx.Key == null)
             {
-                throw new Exception("Key is not initialized.");
+                throw new InvalidObjectException("Key is not initialized.");
             }
 
             ctx.Context.Key = ClientCtx.Key.ECDsaKey;
@@ -319,7 +380,7 @@ public class Client : IFrostFSClient
         {
             if (ClientCtx.Version == null)
             {
-                throw new Exception("Version is not initialized.");
+                throw new InvalidObjectException("Version is not initialized.");
             }
 
             ctx.Context.Version = ClientCtx.Version;

src/FrostFS.SDK.ClientV2/Interceptors/MetricsInterceptor.cs

@@ -14,6 +14,11 @@ public class MetricsInterceptor(Action<CallStatistics> callback) : Interceptor
         ClientInterceptorContext<TRequest, TResponse> context,
         AsyncUnaryCallContinuation<TRequest, TResponse> continuation)
     {
+        if (continuation is null)
+        {
+            throw new ArgumentNullException(nameof(continuation));
+        }
+
         var call = continuation(request, context);
 
         return new AsyncUnaryCall<TResponse>(
@@ -28,7 +33,10 @@ public class MetricsInterceptor(Action<CallStatistics> callback) : Interceptor
         ClientInterceptorContext<TRequest, TResponse> context,
         AsyncClientStreamingCallContinuation<TRequest, TResponse> continuation)
     {
-         var call = continuation(context);
+        if (continuation is null)
+            throw new ArgumentNullException(nameof(continuation));
+
+        var call = continuation(context);
 
         return new AsyncClientStreamingCall<TRequest, TResponse>(
             call.RequestStream,
@@ -44,11 +52,11 @@ public class MetricsInterceptor(Action<CallStatistics> callback) : Interceptor
         var watch = new Stopwatch();
         watch.Start();
 
-        var response = await call.ResponseAsync;
+        var response = await call.ResponseAsync.ConfigureAwait(false);
 
         watch.Stop();
 
-        var elapsed = watch.ElapsedTicks * 1_000_000/Stopwatch.Frequency;
+        var elapsed = watch.ElapsedTicks * 1_000_000 / Stopwatch.Frequency;
 
         callback(new CallStatistics { MethodName = call.ToString(), ElapsedMicroSeconds = elapsed });
 
@@ -60,11 +68,11 @@ public class MetricsInterceptor(Action<CallStatistics> callback) : Interceptor
         var watch = new Stopwatch();
         watch.Start();
 
-        var response = await call.ResponseAsync;
+        var response = await call.ResponseAsync.ConfigureAwait(false);
 
         watch.Stop();
 
-        var elapsed = watch.ElapsedTicks * 1_000_000/Stopwatch.Frequency;
+        var elapsed = watch.ElapsedTicks * 1_000_000 / Stopwatch.Frequency;
 
         callback(new CallStatistics { MethodName = call.ToString(), ElapsedMicroSeconds = elapsed });
 

src/FrostFS.SDK.ClientV2/Mappers/Container.cs

@@ -9,14 +9,12 @@ public static class ContainerMapper
 {
     public static FrostFsContainerInfo ToModel(this Container.Container container)
     {
-        if (!Enum.IsDefined(typeof(BasicAcl),(int)container.BasicAcl))
+        if (container == null)
-            throw new ArgumentException($"Unknown BasicACL rule. Value: '{container.BasicAcl}'.");
+            throw new ArgumentNullException(nameof(container));
 
-        BasicAcl acl = (BasicAcl)container.BasicAcl;
+        return new FrostFsContainerInfo(
-
-        return new FrostFsContainerInfo(acl,
             container.PlacementPolicy.ToModel(),
-            container.Attributes?.Select(a => new FrostFsAttribute(a.Key, a.Value)).ToList(),
+            container.Attributes?.Select(a => new FrostFsAttributePair(a.Key, a.Value)).ToArray(),
             container.Version?.ToModel(),
             container.OwnerId?.ToModel(),
             container.Nonce?.ToUuid());

src/FrostFS.SDK.ClientV2/Mappers/ContainerId.cs

@@ -17,17 +17,21 @@ public static class ContainerIdMapper
 
     public static ContainerID ToMessage(this FrostFsContainerId model)
     {
-        if (model.Value == null)
+        if (model is null)
+        {
             throw new ArgumentNullException(nameof(model));
+        }
 
-        if (!Cache.Containers.TryGetValue(model.Value, out ContainerID? message))
+        var containerId = model.GetValue() ?? throw new ArgumentNullException(nameof(model));
+
+        if (!Cache.Containers.TryGetValue(containerId, out ContainerID? message))
         {
             message = new ContainerID
             {
-                Value = ByteString.CopyFrom(Base58.Decode(model.Value))
+                Value = ByteString.CopyFrom(Base58.Decode(containerId))
             };
 
-            Cache.Containers.Set(model.Value, message, _oneHourExpiration);
+            Cache.Containers.Set(containerId, message, _oneHourExpiration);
         }
 
         return message!;

src/FrostFS.SDK.ClientV2/Mappers/MetaHeader.cs

@@ -1,3 +1,5 @@
+using System;
+
 using FrostFS.Session;
 
 namespace FrostFS.SDK.ClientV2.Mappers.GRPC;
@@ -6,6 +8,11 @@ public static class MetaHeaderMapper
 {
     public static RequestMetaHeader ToMessage(this MetaHeader metaHeader)
     {
+        if (metaHeader is null)
+        {
+            throw new ArgumentNullException(nameof(metaHeader));
+        }
+
         return new RequestMetaHeader
         {
             Version = metaHeader.Version.ToMessage(),

src/FrostFS.SDK.ClientV2/Mappers/Netmap/Netmap.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Linq;
 
 using FrostFS.Netmap;
@@ -8,6 +9,11 @@ public static class NetmapMapper
 {
     public static FrostFsNetmapSnapshot ToModel(this NetmapSnapshotResponse netmap)
     {
+        if (netmap is null)
+        {
+            throw new ArgumentNullException(nameof(netmap));
+        }
+
         return new FrostFsNetmapSnapshot(
             netmap.Body.Netmap.Epoch,
             netmap.Body.Netmap.Nodes

src/FrostFS.SDK.ClientV2/Mappers/Netmap/NodeInfo.cs

@@ -10,11 +10,21 @@ public static class NodeInfoMapper
 {
     public static FrostFsNodeInfo ToModel(this LocalNodeInfoResponse.Types.Body node)
     {
+        if (node is null)
+        {
+            throw new ArgumentNullException(nameof(node));
+        }
+
         return node.NodeInfo.ToModel(node.Version);
     }
 
     public static FrostFsNodeInfo ToModel(this NodeInfo nodeInfo, Refs.Version version)
     {
+        if (nodeInfo is null)
+        {
+            throw new ArgumentNullException(nameof(nodeInfo));
+        }
+
         NodeState state = nodeInfo.State switch
         {
             NodeInfo.Types.State.Unspecified => NodeState.Unspecified,

src/FrostFS.SDK.ClientV2/Mappers/Netmap/PlacementPolicy.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Linq;
 
 using FrostFS.Netmap;
@@ -6,26 +7,13 @@ namespace FrostFS.SDK.ClientV2;
 
 public static class PlacementPolicyMapper
 {
-    public static PlacementPolicy ToMessage(this FrostFsPlacementPolicy placementPolicy)
-    {
-        var pp = new PlacementPolicy
-        {
-            Filters = { },
-            Selectors = { },
-            Replicas = { },
-            Unique = placementPolicy.Unique
-        };
-
-        foreach (var replica in placementPolicy.Replicas)
-        {
-            pp.Replicas.Add(replica.ToMessage());
-        }
-
-        return pp;
-    }
-
     public static FrostFsPlacementPolicy ToModel(this PlacementPolicy placementPolicy)
     {
+        if (placementPolicy is null)
+        {
+            throw new ArgumentNullException(nameof(placementPolicy));
+        }
+
         return new FrostFsPlacementPolicy(
             placementPolicy.Unique,
             placementPolicy.Replicas.Select(replica => replica.ToModel()).ToArray()

src/FrostFS.SDK.ClientV2/Mappers/Netmap/Replica.cs

@@ -1,3 +1,5 @@
+using System;
+
 using FrostFS.Netmap;
 
 namespace FrostFS.SDK.ClientV2;
@@ -15,6 +17,11 @@ public static class ReplicaMapper
 
     public static FrostFsReplica ToModel(this Replica replica)
     {
+        if (replica is null)
+        {
+            throw new ArgumentNullException(nameof(replica));
+        }
+
         return new FrostFsReplica((int)replica.Count, replica.Selector);
     }
 }

src/FrostFS.SDK.ClientV2/Mappers/Object/ObjectAttributeMapper.cs

@@ -1,11 +1,18 @@
+using System;
+
 using FrostFS.Object;
 
 namespace FrostFS.SDK.ClientV2.Mappers.GRPC;
 
 public static class ObjectAttributeMapper
 {
-    public static Header.Types.Attribute ToMessage(this FrostFsAttribute attribute)
+    public static Header.Types.Attribute ToMessage(this FrostFsAttributePair attribute)
     {
+        if (attribute is null)
+        {
+            throw new ArgumentNullException(nameof(attribute));
+        }
+
         return new Header.Types.Attribute
         {
             Key = attribute.Key,
@@ -13,8 +20,13 @@ public static class ObjectAttributeMapper
         };
     }
 
-    public static FrostFsAttribute ToModel(this Header.Types.Attribute attribute)
+    public static FrostFsAttributePair ToModel(this Header.Types.Attribute attribute)
     {
-        return new FrostFsAttribute(attribute.Key, attribute.Value);
+        if (attribute is null)
+        {
+            throw new ArgumentNullException(nameof(attribute));
+        }
+
+        return new FrostFsAttributePair(attribute.Key, attribute.Value);
     }
 }

src/FrostFS.SDK.ClientV2/Mappers/Object/ObjectFilterMapper.cs

@@ -8,6 +8,11 @@ public static class ObjectFilterMapper
 {
     public static SearchRequest.Types.Body.Types.Filter ToMessage(this IObjectFilter filter)
     {
+        if (filter is null)
+        {
+            throw new ArgumentNullException(nameof(filter));
+        }
+
         var objMatchTypeName = filter.MatchType switch
         {
             FrostFsMatchType.Unspecified => MatchType.Unspecified,

src/FrostFS.SDK.ClientV2/Mappers/Object/ObjectHeaderMapper.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.ObjectModel;
 using System.Linq;
 
 using FrostFS.Object;
@@ -10,6 +11,11 @@ public static class ObjectHeaderMapper
 {
     public static FrostFsObjectHeader ToModel(this Header header)
     {
+        if (header is null)
+        {
+            throw new ArgumentNullException(nameof(header));
+        }
+
         var objTypeName = header.ObjectType switch
         {
             ObjectType.Regular => FrostFsObjectType.Regular,
@@ -22,15 +28,15 @@ public static class ObjectHeaderMapper
 
         if (header.Split != null)
         {
-            split = new FrostFsSplit(new SplitId(header.Split.SplitId.ToUuid()))
+            var children = header.Split.Children.Count != 0 ? new ReadOnlyCollection<FrostFsObjectId>(
-            {
+                    header.Split.Children.Select(x => x.ToModel()).ToList()) : null;
-                Parent = header.Split.Parent?.ToModel(),
-                ParentHeader = header.Split.ParentHeader?.ToModel(),
-                Previous = header.Split.Previous?.ToModel()
-            };
 
-            if (header.Split.Children.Count != 0)
+            split = new FrostFsSplit(new SplitId(header.Split.SplitId.ToUuid()),
-                split.Children.AddRange(header.Split.Children.Select(x => x.ToModel()));
+                header.Split.Previous?.ToModel(),
+                header.Split.Parent?.ToModel(),
+                header.Split.ParentHeader?.ToModel(),
+                null,
+                children);
         }
 
         var model = new FrostFsObjectHeader(

src/FrostFS.SDK.ClientV2/Mappers/Object/ObjectId.cs

@@ -1,3 +1,5 @@
+using System;
+
 using FrostFS.Refs;
 
 using Google.Protobuf;
@@ -8,6 +10,11 @@ public static class ObjectIdMapper
 {
     public static ObjectID ToMessage(this FrostFsObjectId objectId)
     {
+        if (objectId is null)
+        {
+            throw new ArgumentNullException(nameof(objectId));
+        }
+
         return new ObjectID
         {
             Value = ByteString.CopyFrom(objectId.ToHash())
@@ -16,6 +23,11 @@ public static class ObjectIdMapper
 
     public static FrostFsObjectId ToModel(this ObjectID objectId)
     {
+        if (objectId is null)
+        {
+            throw new ArgumentNullException(nameof(objectId));
+        }
+
         return FrostFsObjectId.FromHash(objectId.Value.ToByteArray());
     }
 }

src/FrostFS.SDK.ClientV2/Mappers/OwnerId.cs

@@ -17,6 +17,11 @@ public static class OwnerIdMapper
 
     public static OwnerID ToMessage(this FrostFsOwner model)
     {
+        if (model is null)
+        {
+            throw new ArgumentNullException(nameof(model));
+        }
+
         if (!Cache.Owners.TryGetValue(model, out OwnerID? message))
         {
             message = new OwnerID
@@ -32,6 +37,11 @@ public static class OwnerIdMapper
 
     public static FrostFsOwner ToModel(this OwnerID message)
     {
+        if (message is null)
+        {
+            throw new ArgumentNullException(nameof(message));
+        }
+
         if (!Cache.Owners.TryGetValue(message, out FrostFsOwner? model))
         {
             model = new FrostFsOwner(Base58.Encode(message.Value.ToByteArray()));

src/FrostFS.SDK.ClientV2/Mappers/Session/SessionMapper.cs

@@ -1,3 +1,5 @@
+using System;
+
 using Google.Protobuf;
 
 namespace FrostFS.SDK.ClientV2;
@@ -6,8 +8,13 @@ public static class SessionMapper
 {
     public static byte[] Serialize(this Session.SessionToken token)
     {
+        if (token is null)
+        {
+            throw new ArgumentNullException(nameof(token));
+        }
+
         byte[] bytes = new byte[token.CalculateSize()];
-        CodedOutputStream stream = new(bytes);
+        using CodedOutputStream stream = new(bytes);
         token.WriteTo(stream);
 
         return bytes;

src/FrostFS.SDK.ClientV2/Mappers/SignatureMapper.cs

@@ -8,13 +8,17 @@ public static class SignatureMapper
 {
     public static Refs.Signature ToMessage(this FrostFsSignature signature)
     {
+        if (signature is null)
+        {
+            throw new ArgumentNullException(nameof(signature));
+        }
+
         var scheme = signature.Scheme switch
         {
             SignatureScheme.EcdsaRfc6979Sha256 => Refs.SignatureScheme.EcdsaRfc6979Sha256,
             SignatureScheme.EcdsaRfc6979Sha256WalletConnect => Refs.SignatureScheme.EcdsaRfc6979Sha256WalletConnect,
             SignatureScheme.EcdsaSha512 => Refs.SignatureScheme.EcdsaSha512,
-            _ => throw new ArgumentException(message: $"Unexpected enum value: {signature.Scheme}",
+            _ => throw new ArgumentException(nameof(signature.Scheme), $"Unexpected enum value: {signature.Scheme}")
-                                             paramName: nameof(signature.Scheme))
         };
 
         return new Refs.Signature

src/FrostFS.SDK.ClientV2/Mappers/Version.cs

@@ -9,10 +9,15 @@ public static class VersionMapper
 {
     private static readonly Hashtable _cacheMessages = [];
     private static readonly Hashtable _cacheModels = [];
-    private static SpinLock _spinlock = new();
+    private static SpinLock _spinlock;
 
     public static Version ToMessage(this FrostFsVersion model)
     {
+        if (model is null)
+        {
+            throw new System.ArgumentNullException(nameof(model));
+        }
+
         var key = model.Major << 16 + model.Minor;
 
         if (!_cacheMessages.ContainsKey(key))
@@ -46,6 +51,11 @@ public static class VersionMapper
 
     public static FrostFsVersion ToModel(this Version message)
     {
+        if (message is null)
+        {
+            throw new System.ArgumentNullException(nameof(message));
+        }
+
         var key = (int)message.Major << 16 + (int)message.Minor;
 
         if (!_cacheModels.ContainsKey(key))

src/FrostFS.SDK.ClientV2/Models/Chain/ChainTarget.cs

@@ -4,7 +4,7 @@ using Frostfs.V2.Ape;
 
 namespace FrostFS.SDK.ClientV2
 {
-    public struct FrostFsChainTarget(FrostFsTargetType type, string name)
+    public struct FrostFsChainTarget(FrostFsTargetType type, string name) : IEquatable<FrostFsChainTarget>
     {
         private ChainTarget? chainTarget;
 
@@ -33,5 +33,31 @@ namespace FrostFS.SDK.ClientV2
                 _ => throw new ArgumentException("Unexpected value for TargetType", nameof(type)),
             };
         }
+
+        public override readonly bool Equals(object obj)
+        {
+            var target = (FrostFsChainTarget)obj;
+            return Equals(target);
+        }
+
+        public override readonly int GetHashCode()
+        {
+            return $"{Name}{Type}".GetHashCode();
+        }
+
+        public static bool operator ==(FrostFsChainTarget left, FrostFsChainTarget right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(FrostFsChainTarget left, FrostFsChainTarget right)
+        {
+            return !(left == right);
+        }
+
+        public readonly bool Equals(FrostFsChainTarget other)
+        {
+            return Type == other.Type && Name.Equals(other.Name, StringComparison.Ordinal);
+        }
     }
 }

src/FrostFS.SDK.ClientV2/Models/Chain/FrostFsChain.cs

@@ -2,7 +2,7 @@
 
 namespace FrostFS.SDK.ClientV2
 {
-    public struct FrostFsChain (byte[] raw)
+    public struct FrostFsChain(byte[] raw) : System.IEquatable<FrostFsChain>
     {
         private ByteString? grpcRaw;
 
@@ -12,5 +12,31 @@ namespace FrostFS.SDK.ClientV2
         {
             return grpcRaw ??= ByteString.CopyFrom(Raw);
         }
+
+        public override readonly bool Equals(object obj)
+        {
+            var chain = (FrostFsChain)obj;
+            return Equals(chain);
+        }
+
+        public override readonly int GetHashCode()
+        {
+            return Raw.GetHashCode();
+        }
+
+        public static bool operator ==(FrostFsChain left, FrostFsChain right)
+        {
+            return left.Equals(right);
+        }
+
+        public static bool operator !=(FrostFsChain left, FrostFsChain right)
+        {
+            return !(left == right);
+        }
+
+        public readonly bool Equals(FrostFsChain other)
+        {
+            return Raw == other.Raw;
+        }
     }
 }

src/FrostFS.SDK.ClientV2/Models/Client/ClientSettings.cs

@@ -1,5 +1,6 @@
 using System;
-using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Globalization;
 using System.Text;
 
 namespace FrostFS.SDK;
@@ -17,18 +18,24 @@ public class ClientSettings
             ThrowException(errors);
     }
 
-    protected List<string>? CheckFields()
+    protected Collection<string>? CheckFields()
     {
-        List<string>? errors = null;
-
         if (string.IsNullOrWhiteSpace(Host))
-            (errors ??= []).Add(string.Format(errorTemplate, nameof(Host)));
+        {
+            var error = string.Format(CultureInfo.InvariantCulture, errorTemplate, nameof(Host));
+            return new Collection<string>([error]);
+        }
 
-        return errors;
+        return null;
     }
 
-    protected static void ThrowException(List<string> errors)
+    protected static void ThrowException(Collection<string> errors)
     {
+        if (errors is null)
+        {
+            throw new ArgumentNullException(nameof(errors));
+        }
+
         StringBuilder messages = new();
 
         foreach (var error in errors)
@@ -51,12 +58,12 @@ public class SingleOwnerClientSettings : ClientSettings
             ThrowException(errors);
     }
 
-    protected new List<string>? CheckFields()
+    protected new Collection<string>? CheckFields()
     {
-        List<string>? errors = base.CheckFields();
+        Collection<string>? errors = base.CheckFields();
 
         if (string.IsNullOrWhiteSpace(Key))
-            (errors ??= []).Add(string.Format(errorTemplate, nameof(Key)));
+            (errors ??= []).Add(string.Format(CultureInfo.InvariantCulture, errorTemplate, nameof(Key)));
 
         return errors;
     }

src/FrostFS.SDK.ClientV2/Models/Containers/FrostFsContainerId.cs

@@ -1,8 +1,7 @@
 using FrostFS.Refs;
-using FrostFS.SDK.Cryptography;
-
-using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.ClientV2;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
+using FrostFS.SDK.Cryptography;
 
 namespace FrostFS.SDK;
 
@@ -21,21 +20,18 @@ public class FrostFsContainerId
         this.containerID = id;
     }
 
-    public string Value
+    public string GetValue()
     {
-        get
+        if (this.modelId != null)
+            return this.modelId;
+
+        if (containerID != null)
         {
-            if (this.modelId != null)
+            this.modelId = Base58.Encode(containerID.Value.ToByteArray());
-                return this.modelId;
+            return this.modelId;
-
-            if (containerID != null)
-            {
-                this.modelId = Base58.Encode(containerID.Value.ToByteArray());
-                return this.modelId;
-            }
-
-            throw new InvalidObjectException();
         }
+
+        throw new InvalidObjectException();
     }
 
     internal ContainerID ContainerID
@@ -57,6 +53,6 @@ public class FrostFsContainerId
 
     public override string ToString()
     {
-        return Value;
+        return GetValue();
     }
 }

src/FrostFS.SDK.ClientV2/Models/Containers/FrostFsContainerInfo.cs

@@ -1,10 +1,10 @@
 using System;
-using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 
 using FrostFS.SDK.ClientV2;
-using FrostFS.SDK.Cryptography;
 using FrostFS.SDK.ClientV2.Mappers.GRPC;
+using FrostFS.SDK.Cryptography;
 
 using Google.Protobuf;
 
@@ -12,27 +12,27 @@ namespace FrostFS.SDK;
 
 public class FrostFsContainerInfo
 {
-    private FrostFS.Container.Container.Types.Attribute[]? grpsAttributes;
+    private Container.Container.Types.Attribute[]? grpsAttributes;
-    private List<FrostFsAttribute>? attributes;
+    private ReadOnlyCollection<FrostFsAttributePair>? attributes;
     private FrostFsPlacementPolicy? placementPolicy;
     private Guid? nonce;
 
-    private Container.Container container;
+    private Container.Container? container;
 
     public FrostFsContainerInfo(
-        BasicAcl basicAcl, 
         FrostFsPlacementPolicy placementPolicy,
-        List<FrostFsAttribute>? attributes = null,
+        FrostFsAttributePair[]? attributes = null,
         FrostFsVersion? version = null,
         FrostFsOwner? owner = null,
         Guid? nonce = null)
     {
-        BasicAcl = basicAcl;
         this.placementPolicy = placementPolicy;
-        this.attributes = attributes;
         Version = version;
         Owner = owner;
         this.nonce = nonce;
+
+        if (attributes != null)
+            this.attributes = new ReadOnlyCollection<FrostFsAttributePair>(attributes);
     }
 
     internal FrostFsContainerInfo(Container.Container container)
@@ -49,23 +49,21 @@ public class FrostFsContainerInfo
         }
     }
 
-    public BasicAcl BasicAcl { get; private set; }
-
     public FrostFsPlacementPolicy? PlacementPolicy
     {
         get
         {
-            placementPolicy ??= container.PlacementPolicy?.ToModel();
+            placementPolicy ??= container?.PlacementPolicy?.ToModel();
             return placementPolicy;
         }
     }
 
-    public List<FrostFsAttribute>? Attributes 
+    public ReadOnlyCollection<FrostFsAttributePair>? Attributes
     {
         get
         {
             if (attributes == null && grpsAttributes != null)
-                attributes = grpsAttributes.Select(a => new FrostFsAttribute(a.Key, a.Value)).ToList();
+                attributes = new ReadOnlyCollection<FrostFsAttributePair>(grpsAttributes.Select(a => new FrostFsAttributePair(a.Key, a.Value)).ToList());
 
             return attributes;
         }
@@ -88,10 +86,14 @@ public class FrostFsContainerInfo
     {
         if (this.container == null)
         {
+            if (PlacementPolicy == null)
+            {
+                throw new InvalidObjectException("PlacementPolicy is null");
+            }
+
             this.container = new Container.Container()
             {
-                BasicAcl = (uint)BasicAcl,
+                PlacementPolicy = PlacementPolicy.Value.GetPolicy(),
-                PlacementPolicy = PlacementPolicy.ToMessage(),
                 Nonce = ByteString.CopyFrom(Nonce.ToBytes()),
                 OwnerId = Owner?.OwnerID,
                 Version = Version?.Version

src/FrostFS.SDK.ClientV2/Models/Enums/BasicAcl.cs

@@ -1,21 +0,0 @@
-using System.ComponentModel;
-
-namespace FrostFS.SDK;
-
-public enum BasicAcl
-{
-    [Description("Not defined ACL")] 
-    NotDefined = 0x00000000,
-
-    [Description("Basic ACL for private container")]
-    Private = 0x1C8C8CCC,
-
-    [Description("Basic ACL for public RO container")]
-    PublicRO = 0x1FBF8CFF,
-
-    [Description("Basic ACL for public RW container")]
-    PublicRW = 0x1FBFBFFF,
-
-    [Description("Basic ACL for public append container")]
-    PublicAppend = 0x1FBF9FFF,
-}

src/FrostFS.SDK.ClientV2/Models/Misc/CheckSum.cs

@@ -1,20 +1,21 @@
-using FrostFS.SDK.Cryptography;
 using System;
 
+using FrostFS.SDK.Cryptography;
+
 namespace FrostFS.SDK;
 
 public class CheckSum
 {
-    // type is always Sha256
+    private byte[]? hash;
-    public byte[]? Hash { get; set; } 
+    private string? text;
 
     public static CheckSum CreateCheckSum(byte[] content)
     {
-        return new CheckSum { Hash = content.Sha256() };
+        return new CheckSum { hash = content.Sha256() };
     }
 
     public override string ToString()
     {
-        return BitConverter.ToString(Hash).Replace("-", "");
+        return text ??= BitConverter.ToString(hash).Replace("-", "");
     }
 }

src/FrostFS.SDK.ClientV2/Models/Misc/Constants.cs

@@ -1,6 +1,6 @@
 namespace FrostFS.SDK;
 
-public class Constants
+public static class Constants
 {
     public const int ObjectChunkSize = 3 * (1 << 20);
     public const int Sha256HashLength = 32;

src/FrostFS.SDK.ClientV2/Models/Netmap/FrostFsPlacementPolicy.cs

@@ -1,28 +1,89 @@
+
 using System;
 using System.Linq;
 
+using FrostFS.Netmap;
+using FrostFS.SDK.ClientV2;
+
 namespace FrostFS.SDK;
 
-public class FrostFsPlacementPolicy(bool unique, params FrostFsReplica[] replicas) : IComparable<FrostFsPlacementPolicy>
+public struct FrostFsPlacementPolicy(bool unique, params FrostFsReplica[] replicas)
+    : IEquatable<FrostFsPlacementPolicy>
 {
+    private PlacementPolicy policy;
+
     public FrostFsReplica[] Replicas { get; private set; } = replicas;
     public bool Unique { get; private set; } = unique;
 
-    public int CompareTo(FrostFsPlacementPolicy other)
+    public override readonly bool Equals(object obj)
     {
-        var notEqual = other == null
+        if (obj is null)
-            || Unique != other.Unique
+            return false;
-            || Replicas.Length != other.Replicas.Length;
+
+        var other = (FrostFsPlacementPolicy)obj;
+
+        return Equals(other);
+    }
+
+    public PlacementPolicy GetPolicy()
+    {
+        if (policy == null)
+        {
+            policy = new PlacementPolicy
+            {
+                Filters = { },
+                Selectors = { },
+                Replicas = { },
+                Unique = Unique
+            };
+
+            foreach (var replica in Replicas)
+            {
+                policy.Replicas.Add(replica.ToMessage());
+            }
+        }
+
+        return policy;
+    }
+
+    //public static FrostFsPlacementPolicy ToModel(placementPolicy)
+    //{
+    //    return new FrostFsPlacementPolicy(
+    //        placementPolicy.Unique,
+    //        placementPolicy.Replicas.Select(replica => replica.ToModel()).ToArray()
+    //    );
+    //}
+
+
+    public override readonly int GetHashCode()
+    {
+        return Unique ? 17 : 0 + Replicas.GetHashCode();
+    }
+
+    public static bool operator ==(FrostFsPlacementPolicy left, FrostFsPlacementPolicy right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(FrostFsPlacementPolicy left, FrostFsPlacementPolicy right)
+    {
+        return !(left == right);
+    }
+
+    public readonly bool Equals(FrostFsPlacementPolicy other)
+    {
+        var notEqual = Unique != other.Unique
+         || Replicas.Length != other.Replicas.Length;
 
         if (notEqual)
-            return 1;
+            return false;
 
         foreach (var replica in Replicas)
         {
-            if (!other!.Replicas.Any(r => r.Count == replica.Count && r.Selector == replica.Selector))
+            if (!other.Replicas.Any(r => r.Equals(replica)))
-                return 1;
+                return false;
         }
 
-        return 0;
+        return true;
     }
 }

src/FrostFS.SDK.ClientV2/Models/Netmap/FrostFsReplica.cs

@@ -1,6 +1,8 @@
+using System;
+
 namespace FrostFS.SDK;
 
-public class FrostFsReplica
+public struct FrostFsReplica : IEquatable<FrostFsReplica>
 {
     public int Count { get; set; }
     public string Selector { get; set; }
@@ -12,4 +14,34 @@ public class FrostFsReplica
         Count = count;
         Selector = selector;
     }
+
+    public override readonly bool Equals(object obj)
+    {
+        if (obj is null)
+            return false;
+
+        var other = (FrostFsReplica)obj;
+
+        return Count == other.Count && Selector == other.Selector;
+    }
+
+    public override readonly int GetHashCode()
+    {
+        return Count + Selector.GetHashCode();
+    }
+
+    public static bool operator ==(FrostFsReplica left, FrostFsReplica right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(FrostFsReplica left, FrostFsReplica right)
+    {
+        return !(left == right);
+    }
+
+    public readonly bool Equals(FrostFsReplica other)
+    {
+        return Count == other.Count && Selector == other.Selector;
+    }
 }

src/FrostFS.SDK.ClientV2/Models/Netmap/FrostFsVersion.cs

@@ -5,7 +5,7 @@ namespace FrostFS.SDK;
 
 public class FrostFsVersion(int major, int minor)
 {
-    public Version version;
+    private Version? version;
 
     public int Major { get; set; } = major;
     public int Minor { get; set; } = minor;
@@ -21,6 +21,11 @@ public class FrostFsVersion(int major, int minor)
 
     public bool IsSupported(FrostFsVersion version)
     {
+        if (version is null)
+        {
+            throw new System.ArgumentNullException(nameof(version));
+        }
+
         return Major == version.Major;
     }
 

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsAttributePair.cs

@@ -1,6 +1,6 @@
 namespace FrostFS.SDK;
 
-public class FrostFsAttribute(string key, string value)
+public class FrostFsAttributePair(string key, string value)
 {
     public string Key { get; set; } = key;
 

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsLinkObject.cs

@@ -1,13 +1,21 @@
-namespace FrostFS.SDK;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+
+namespace FrostFS.SDK;
 
 public class FrostFsLinkObject : FrostFsObject
 {
-    public FrostFsLinkObject(FrostFsContainerId containerId, SplitId splitId, FrostFsObjectHeader largeObjectHeader) 
+    public FrostFsLinkObject(FrostFsContainerId containerId,
+        SplitId splitId,
+        FrostFsObjectHeader largeObjectHeader,
+        IList<FrostFsObjectId> children)
         : base(containerId)
     {
-        Header!.Split = new FrostFsSplit(splitId)
+        Header!.Split = new FrostFsSplit(splitId,
-        {
+            null,
-            ParentHeader = largeObjectHeader
+            null,
-        };
+            largeObjectHeader,
+            null,
+            new ReadOnlyCollection<FrostFsObjectId>(children));
     }
 }

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsObject.cs

@@ -1,9 +1,11 @@
-using System;
+using FrostFS.SDK.ClientV2;
 
 namespace FrostFS.SDK;
 
 public class FrostFsObject
 {
+    private byte[]? bytes;
+
     /// <summary>
     /// Creates new instance from <c>ObjectHeader</c>
     /// </summary>
@@ -37,19 +39,27 @@ public class FrostFsObject
         get; set;
     }
 
-    /// <summary>
-    /// The size of payload cannot exceed <c>MaxObjectSize</c> value from <c>NetworkSettings</c>
-    /// Used only for PutSingleObject method
-    /// </summary>
-    /// <value>Buffer for output data</value>
-    public byte[] Payload { get; set; } = [];
-
     /// <summary>
     /// A payload is obtained via stream reader
     /// </summary>
     /// <value>Reader for received data</value>
     public IObjectReader? ObjectReader { get; set; }
 
+    internal byte[] SingleObjectPayload
+    {
+        get { return bytes ?? []; }
+    }
+
+    /// <summary>
+    /// The size of payload cannot exceed <c>MaxObjectSize</c> value from <c>NetworkSettings</c>
+    /// Used only for PutSingleObject method
+    /// </summary>
+    /// <value>Buffer for output data</value>
+    public void SetSingleObjectPayload(byte[] bytes)
+    {
+        this.bytes = bytes;
+    }
+
     /// <summary>
     /// Applied only for the last Object in chain in case of manual multipart uploading
     /// </summary>
@@ -57,7 +67,7 @@ public class FrostFsObject
     public void SetParent(FrostFsObjectHeader largeObjectHeader)
     {
         if (Header?.Split == null)
-            throw new Exception("The object is not initialized properly");
+            throw new InvalidObjectException("The object is not initialized properly");
 
         Header.Split.ParentHeader = largeObjectHeader;
     }

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsObjectFilter.cs

@@ -27,7 +27,7 @@ public abstract class FrostFsObjectFilter<T>(FrostFsMatchType matchType, string
 /// <param name="matchType">Match type</param>
 /// <param name="key">Attribute key</param>
 /// <param name="value">Attribute value</param>
-public class FilterByAttribute(FrostFsMatchType matchType, string key, string value) : FrostFsObjectFilter<string>(matchType, key, value) { }
+public class FilterByAttributePair(FrostFsMatchType matchType, string key, string value) : FrostFsObjectFilter<string>(matchType, key, value) { }
 
 /// <summary>
 /// Creates filter to search by ObjectId

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsObjectHeader.cs

@@ -1,5 +1,5 @@
 using System;
-using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 
 using FrostFS.Object;
@@ -11,15 +11,17 @@ namespace FrostFS.SDK;
 public class FrostFsObjectHeader(
     FrostFsContainerId containerId,
     FrostFsObjectType type = FrostFsObjectType.Regular,
-    FrostFsAttribute[]? attributes = null,
+    FrostFsAttributePair[]? attributes = null,
     FrostFsSplit? split = null,
     FrostFsOwner? owner = null,
     FrostFsVersion? version = null)
 {
-    private Header header;
+    private Header? header;
     private Container.Container.Types.Attribute[]? grpsAttributes;
 
-    public List<FrostFsAttribute> Attributes { get; internal set; } = attributes != null ? [.. attributes] : [];
+    public ReadOnlyCollection<FrostFsAttributePair>? Attributes { get; internal set; } =
+        attributes == null ? null :
+        new ReadOnlyCollection<FrostFsAttributePair>(attributes);
 
     public FrostFsContainerId ContainerId { get; } = containerId;
 
@@ -65,9 +67,12 @@ public class FrostFsObjectHeader(
                 PayloadLength = PayloadLength
             };
 
-            foreach (var attribute in Attributes)
+            if (Attributes != null)
             {
-                this.header.Attributes.Add(attribute.ToMessage());
+                foreach (var attribute in Attributes)
+                {
+                    this.header.Attributes.Add(attribute.ToMessage());
+                }
             }
 
             var split = Split;

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsObjectId.cs

@@ -10,6 +10,11 @@ public class FrostFsObjectId(string id)
 
     public static FrostFsObjectId FromHash(byte[] hash)
     {
+        if (hash is null)
+        {
+            throw new ArgumentNullException(nameof(hash));
+        }
+
         if (hash.Length != Constants.Sha256HashLength)
             throw new FormatException("ObjectID must be a sha256 hash.");
 

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsOwner.cs

@@ -8,7 +8,7 @@ namespace FrostFS.SDK;
 
 public class FrostFsOwner(string id)
 {
-    private OwnerID ownerID;
+    private OwnerID? ownerID;
 
     public string Value { get; } = id;
 

src/FrostFS.SDK.ClientV2/Models/Object/FrostFsSplit.cs

@@ -1,8 +1,13 @@
-using System.Collections.Generic;
+using System.Collections.ObjectModel;
 
 namespace FrostFS.SDK;
 
-public class FrostFsSplit(SplitId splitId)
+public class FrostFsSplit(SplitId splitId,
+    FrostFsObjectId? previous = null,
+    FrostFsObjectId? parent = null,
+    FrostFsObjectHeader? parentHeader = null,
+    FrostFsSignature? parentSignature = null,
+    ReadOnlyCollection<FrostFsObjectId>? children = null)
 {
     public FrostFsSplit() : this(new SplitId())
     {
@@ -10,15 +15,14 @@ public class FrostFsSplit(SplitId splitId)
 
     public SplitId SplitId { get; private set; } = splitId;
 
-    public FrostFsObjectId? Parent { get; set; }
+    public FrostFsObjectId? Previous { get; } = previous;
 
-    public FrostFsObjectId? Previous { get; set; }
+    public FrostFsObjectId? Parent { get; } = parent;
 
-    public FrostFsSignature? ParentSignature { get; set; }
+    public FrostFsSignature? ParentSignature { get; } = parentSignature;
 
-    public FrostFsObjectHeader? ParentHeader { get; set; }
+    public FrostFsObjectHeader? ParentHeader { get; set; } = parentHeader;
 
-    public List<FrostFsObjectId> Children { get; } = [];
+    public ReadOnlyCollection<FrostFsObjectId>? Children { get; } = children;
 
-    public Refs.Signature ParentSignatureGrpc { get; set; }
 }

src/FrostFS.SDK.ClientV2/Models/Object/SplitId.cs

@@ -1,35 +1,35 @@
-using FrostFS.SDK.Cryptography;
+using System;
+
+using FrostFS.SDK.Cryptography;
 
 using Google.Protobuf;
 
-using System;
-
 namespace FrostFS.SDK;
 
 public class SplitId
 {
     private readonly Guid id;
 
-    private ByteString? _message;
+    private ByteString? message;
 
     public SplitId()
     {
-        id = Guid.NewGuid();
+        this.id = Guid.NewGuid();
     }
 
-    public SplitId(Guid guid)
+    public SplitId(Guid id)
     {
-        id = guid;
+        this.id = id;
     }
 
     private SplitId(byte[] binary)
     {
-        id = new Guid(binary);
+        this.id = new Guid(binary);
     }
 
     private SplitId(string str)
     {
-        id = new Guid(str);
+        this.id = new Guid(str);
     }
 
     public static SplitId CreateFromBinary(byte[] binaryData)
@@ -44,19 +44,19 @@ public class SplitId
 
     public override string ToString()
     {
-        return id.ToString();
+        return this.id.ToString();
     }
 
     public byte[]? ToBinary()
     {
-        if (id == Guid.Empty)
+        if (this.id == Guid.Empty)
             return null;
 
-        return id.ToBytes();
+        return this.id.ToBytes();
     }
 
     public ByteString? GetSplitId()
     {
-        return _message ??= ByteString.CopyFrom(ToBinary());
+        return this.message ??= ByteString.CopyFrom(ToBinary());
     }
 }

src/FrostFS.SDK.ClientV2/Models/Response/FrostFsSignature.cs

@@ -1,6 +1,6 @@
 namespace FrostFS.SDK;
 
-public class FrostFsSignature
+public class FrostFsSignature()
 {
     public byte[]? Key { get; set; }
 

src/FrostFS.SDK.ClientV2/Parameters/Context.cs

@@ -1,5 +1,5 @@
 using System;
-using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Security.Cryptography;
 using System.Threading;
 
@@ -13,27 +13,27 @@ namespace FrostFS.SDK.ClientV2;
 
 public class Context()
 {
-    private List<Interceptor>? interceptors;
+    private ReadOnlyCollection<Interceptor>? interceptors;
 
     private ByteString? publicKeyCache;
 
-    public ECDsa Key { get; set; }
+    public ECDsa? Key { get; set; }
 
-    public FrostFsOwner OwnerId { get; set; }
+    public FrostFsOwner? OwnerId { get; set; }
 
-    public FrostFsVersion Version { get; set; }
+    public FrostFsVersion? Version { get; set; }
 
-    public CancellationToken CancellationToken { get; set; } = default;
+    public CancellationToken CancellationToken { get; set; }
 
-    public TimeSpan Timeout { get; set; } = default;
+    public TimeSpan Timeout { get; set; }
 
     public DateTime? Deadline => Timeout.Ticks > 0 ? DateTime.UtcNow.Add(Timeout) : null;
 
     public Action<CallStatistics>? Callback { get; set; }
 
-    public List<Interceptor> Interceptors
+    public ReadOnlyCollection<Interceptor>? Interceptors
     {
-        get { return this.interceptors ??= []; }
+        get { return this.interceptors; }
         set { this.interceptors = value; }
     }
 

src/FrostFS.SDK.ClientV2/Parameters/PrmBase.cs

@@ -2,12 +2,12 @@
 
 namespace FrostFS.SDK.ClientV2;
 
-public class PrmBase() : IContext
+public class PrmBase(NameValueCollection? xheaders = null) : IContext
 {
     /// <summary>
     /// FrostFS request X-Headers
     /// </summary>
-    public NameValueCollection XHeaders { get; set; } = [];
+    public NameValueCollection XHeaders { get; } = xheaders ?? [];
 
     /// <inheritdoc />
     public Context? Context { get; set; }

src/FrostFS.SDK.ClientV2/Parameters/PrmObjectPut.cs

@@ -40,7 +40,7 @@ public sealed class PrmObjectPut : PrmBase, ISessionToken
 
     internal int MaxObjectSizeCache { get; set; }
 
-    internal ulong CurrentStreamPosition { get; set; } = 0;
+    internal ulong CurrentStreamPosition { get; set; }
 
-    internal ulong FullLength { get; set; } = 0;
+    internal ulong FullLength { get; set; }
 }

src/FrostFS.SDK.ClientV2/Services/ContainerServiceProvider.cs

@@ -3,22 +3,22 @@ using System.Collections.Generic;
 using System.Collections.Specialized;
 using System.Threading.Tasks;
 
-using FrostFS.SDK.ClientV2;
 using FrostFS.Container;
+using FrostFS.Refs;
+using FrostFS.SDK.ClientV2;
 using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.Cryptography;
-using FrostFS.Refs;
 using FrostFS.Session;
 
 namespace FrostFS.SDK.ClientV2;
 
-internal class ContainerServiceProvider(ContainerService.ContainerServiceClient service, ClientEnvironment context) : ContextAccessor(context), ISessionProvider
+internal sealed class ContainerServiceProvider(ContainerService.ContainerServiceClient service, ClientEnvironment context) : ContextAccessor(context), ISessionProvider
 {
     readonly SessionProvider sessions = new(context);
 
     public async ValueTask<SessionToken> GetOrCreateSession(ISessionToken args, Context ctx)
     {
-        return await sessions.GetOrCreateSession(args, ctx);
+        return await sessions.GetOrCreateSession(args, ctx).ConfigureAwait(false);
     }
 
     internal async Task<FrostFsContainerInfo> GetContainerAsync(PrmContainerGet args)
@@ -35,10 +35,17 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
     internal async IAsyncEnumerable<FrostFsContainerId> ListContainersAsync(PrmContainerGetAll args)
     {
         var ctx = args.Context!;
+        ctx.OwnerId ??= Context.Owner;
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+        if (ctx.OwnerId == null)
+            throw new InvalidObjectException(nameof(ctx.OwnerId));
 
         var request = new ListRequest
         {
-            Body = new () 
+            Body = new()
             {
                 OwnerId = ctx.OwnerId.ToMessage()
             }
@@ -63,8 +70,15 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
 
         var grpcContainer = args.Container.GetContainer();
 
-        grpcContainer.OwnerId ??= ctx.OwnerId.ToMessage();
+        grpcContainer.OwnerId ??= ctx.OwnerId?.ToMessage();
-        grpcContainer.Version ??= ctx.Version.ToMessage();
+        grpcContainer.Version ??= ctx.Version?.ToMessage();
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+        if (grpcContainer.OwnerId == null)
+            throw new InvalidObjectException(nameof(grpcContainer.OwnerId));
+        if (grpcContainer.Version == null)
+            throw new InvalidObjectException(nameof(grpcContainer.Version));
 
         var request = new PutRequest
         {
@@ -75,13 +89,13 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx);
+        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
 
         sessionToken.CreateContainerTokenContext(
             null,
             ContainerSessionContext.Types.Verb.Put,
             ctx.Key,
-            ctx.GetPublicKeyCache());
+            ctx.GetPublicKeyCache()!);
 
         request.AddMetaHeader(args.XHeaders, sessionToken);
 
@@ -91,7 +105,7 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
 
         Verifier.CheckResponse(response);
 
-        await WaitForContainer(WaitExpects.Exists, response.Body.ContainerId, args.WaitParams, ctx);
+        await WaitForContainer(WaitExpects.Exists, response.Body.ContainerId, args.WaitParams, ctx).ConfigureAwait(false);
 
         return new FrostFsContainerId(response.Body.ContainerId);
     }
@@ -99,6 +113,9 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
     internal async Task DeleteContainerAsync(PrmContainerDelete args)
     {
         var ctx = args.Context!;
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var request = new DeleteRequest
         {
             Body = new DeleteRequest.Types.Body
@@ -108,13 +125,13 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx);
+        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
 
         sessionToken.CreateContainerTokenContext(
             request.Body.ContainerId,
             ContainerSessionContext.Types.Verb.Delete,
             ctx.Key,
-            ctx.GetPublicKeyCache());
+            ctx.GetPublicKeyCache()!);
 
         request.AddMetaHeader(args.XHeaders, sessionToken);
 
@@ -124,13 +141,17 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
 
         Verifier.CheckResponse(response);
 
-        await WaitForContainer(WaitExpects.Removed, request.Body.ContainerId, args.WaitParams, ctx);
+        await WaitForContainer(WaitExpects.Removed, request.Body.ContainerId, args.WaitParams, ctx)
+            .ConfigureAwait(false);
 
         Verifier.CheckResponse(response);
     }
 
     private static GetRequest GetContainerRequest(ContainerID id, NameValueCollection? xHeaders, Context ctx)
     {
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var request = new GetRequest
         {
             Body = new GetRequest.Types.Body
@@ -161,7 +182,7 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
             Verifier.CheckResponse(response);
         }
 
-        await WaitFor(action, expect, waitParams);
+        await WaitFor(action, expect, waitParams).ConfigureAwait(false);
     }
 
     private static async Task WaitFor(
@@ -176,7 +197,7 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
         {
             try
             {
-                await action();
+                await action().ConfigureAwait(false);
 
                 if (expect == WaitExpects.Exists)
                     return;
@@ -184,20 +205,20 @@ internal class ContainerServiceProvider(ContainerService.ContainerServiceClient
                 if (DateTime.UtcNow >= deadLine)
                     throw new TimeoutException();
 
-                await Task.Delay(waitParams.PollInterval);
+                await Task.Delay(waitParams.PollInterval).ConfigureAwait(false);
             }
             catch (ResponseException ex)
             {
                 if (DateTime.UtcNow >= deadLine)
                     throw new TimeoutException();
 
-                if (ex.Status.Code != FrostFsStatusCode.ContainerNotFound)
+                if (ex.Status?.Code != FrostFsStatusCode.ContainerNotFound)
                     throw;
 
                 if (expect == WaitExpects.Removed)
                     return;
 
-                await Task.Delay(waitParams.PollInterval);
+                await Task.Delay(waitParams.PollInterval).ConfigureAwait(false);
             }
         }
     }

src/FrostFS.SDK.ClientV2/Services/NetmapServiceProvider.cs

@@ -8,7 +8,7 @@ using static FrostFS.Netmap.NetworkConfig.Types;
 
 namespace FrostFS.SDK.ClientV2;
 
-internal class NetmapServiceProvider : ContextAccessor
+internal sealed class NetmapServiceProvider : ContextAccessor
 {
     private readonly NetmapService.NetmapServiceClient netmapServiceClient;
 
@@ -23,7 +23,7 @@ internal class NetmapServiceProvider : ContextAccessor
         if (Context.NetworkSettings != null)
             return Context.NetworkSettings;
 
-        var info = await GetNetworkInfoAsync(ctx);
+        var info = await GetNetworkInfoAsync(ctx).ConfigureAwait(false);
 
         var settings = new NetworkSettings();
 
@@ -40,6 +40,11 @@ internal class NetmapServiceProvider : ContextAccessor
     internal async Task<FrostFsNodeInfo> GetLocalNodeInfoAsync(PrmNodeInfo args)
     {
         var ctx = args.Context!;
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var request = new LocalNodeInfoRequest
         {
             Body = new LocalNodeInfoRequest.Types.Body { }
@@ -57,12 +62,18 @@ internal class NetmapServiceProvider : ContextAccessor
 
     internal async Task<NetworkInfoResponse> GetNetworkInfoAsync(Context ctx)
     {
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var request = new NetworkInfoRequest();
 
         request.AddMetaHeader(null);
         request.Sign(ctx.Key);
 
-        var response = await netmapServiceClient.NetworkInfoAsync(request, null, ctx.Deadline, ctx.CancellationToken);
+        var response = await netmapServiceClient.NetworkInfoAsync(request, null, ctx.Deadline, ctx.CancellationToken)
+            .ConfigureAwait(false);
 
         Verifier.CheckResponse(response);
 
@@ -72,6 +83,10 @@ internal class NetmapServiceProvider : ContextAccessor
     internal async Task<FrostFsNetmapSnapshot> GetNetmapSnapshotAsync(PrmNetmapSnapshot args)
     {
         var ctx = args.Context!;
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
 
         var request = new NetmapSnapshotRequest();
 

src/FrostFS.SDK.ClientV2/Services/ObjectServiceProvider.cs

@@ -6,9 +6,8 @@ using System.Threading.Tasks;
 
 using FrostFS.Object;
 using FrostFS.Refs;
-using FrostFS.SDK.ClientV2.Extensions;
-using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.ClientV2;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.Cryptography;
 using FrostFS.Session;
 
@@ -16,19 +15,30 @@ using Google.Protobuf;
 
 namespace FrostFS.SDK.ClientV2;
 
-internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, ClientEnvironment env)
+internal sealed class ObjectServiceProvider : ContextAccessor, ISessionProvider
-    : ContextAccessor(env), ISessionProvider
 {
-    readonly SessionProvider sessions = new (env);
+    private readonly SessionProvider sessions;
+    private ObjectService.ObjectServiceClient client;
 
-    public async ValueTask<Session.SessionToken> GetOrCreateSession(ISessionToken args, Context ctx)
+    internal ObjectServiceProvider(ObjectService.ObjectServiceClient client, ClientEnvironment env)
+        : base(env)
     {
-        return await sessions.GetOrCreateSession(args, ctx);
+        this.sessions = new(Context);
+        this.client = client;
+    }
+
+    public async ValueTask<SessionToken> GetOrCreateSession(ISessionToken args, Context ctx)
+    {
+        return await sessions.GetOrCreateSession(args, ctx).ConfigureAwait(false);
     }
 
     internal async Task<FrostFsObjectHeader> GetObjectHeadAsync(PrmObjectHeadGet args)
     {
         var ctx = args.Context!;
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
 
         var request = new HeadRequest
         {
@@ -42,7 +52,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx);
+        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
 
         sessionToken.CreateObjectTokenContext(
             request.Body.Address,
@@ -53,7 +63,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
         request.Sign(ctx.Key);
 
-        var response = await client!.HeadAsync(request, null, ctx.Deadline, ctx.CancellationToken);
+        var response = await client!.HeadAsync(request, null, ctx.Deadline, ctx.CancellationToken).ConfigureAwait(false);
 
         Verifier.CheckResponse(response);
 
@@ -64,6 +74,11 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
     {
         var ctx = args.Context!;
 
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var request = new GetRequest
         {
             Body = new GetRequest.Types.Body
@@ -76,7 +91,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx);
+        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
 
         sessionToken.CreateObjectTokenContext(
             request.Body.Address,
@@ -87,12 +102,17 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
         request.Sign(ctx.Key);
 
-        return await GetObject(request, ctx);
+        return await GetObject(request, ctx).ConfigureAwait(false);
     }
 
     internal async Task DeleteObjectAsync(PrmObjectDelete args)
     {
         var ctx = args.Context!;
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var request = new DeleteRequest
         {
             Body = new DeleteRequest.Types.Body
@@ -105,7 +125,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx);
+        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
 
         sessionToken.CreateObjectTokenContext(
             request.Body.Address,
@@ -123,19 +143,22 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
     internal async IAsyncEnumerable<FrostFsObjectId> SearchObjectsAsync(PrmObjectSearch args)
     {
         var ctx = args.Context!;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var request = new SearchRequest
         {
             Body = new SearchRequest.Types.Body
             {
                 ContainerId = args.ContainerId.ToMessage(),
-                Filters = { },
                 Version = 1  // TODO: clarify this param
             }
         };
 
         request.Body.Filters.AddRange(args.Filters.Select(f => f.ToMessage()));
 
-        var sessionToken = await GetOrCreateSession(args, ctx);
+        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
 
         sessionToken.CreateObjectTokenContext(
             new Address { ContainerId = request.Body.ContainerId },
@@ -156,14 +179,17 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
     internal async Task<FrostFsObjectId> PutObjectAsync(PrmObjectPut args)
     {
+        if (args is null)
+            throw new ArgumentNullException(nameof(args));
+
         if (args.Header == null)
-            throw new ArgumentException("Value cannot be null", nameof(args.Header));
+            throw new ArgumentException(nameof(args.Header));
 
         if (args.Payload == null)
-            throw new ArgumentException("Value cannot be null", nameof(args.Payload));
+            throw new ArgumentException(nameof(args.Payload));
 
         if (args.ClientCut)
-            return await PutClientCutObject(args);
+            return await PutClientCutObject(args).ConfigureAwait(false);
         else
         {
             if (args.Header.PayloadLength > 0)
@@ -171,24 +197,28 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
             else if (args.Payload.CanSeek)
                 args.FullLength = (ulong)args.Payload.Length;
 
-            return (await PutStreamObject(args)).ObjectId;
+            return (await PutStreamObject(args).ConfigureAwait(false)).ObjectId;
         }
     }
 
     internal async Task<FrostFsObjectId> PutSingleObjectAsync(PrmSingleObjectPut args)
     {
         var ctx = args.Context!;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var grpcObject = ObjectTools.CreateObject(args.FrostFsObject, ctx);
 
         var request = new PutSingleRequest
         {
-            Body = new () { Object = grpcObject }
+            Body = new() { Object = grpcObject }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx);
+        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
 
         sessionToken.CreateObjectTokenContext(
-            new Address { ContainerId = grpcObject.Header.ContainerId, ObjectId = grpcObject.ObjectId},
+            new Address { ContainerId = grpcObject.Header.ContainerId, ObjectId = grpcObject.ObjectId },
             ObjectSessionContext.Types.Verb.Put,
             ctx.Key);
 
@@ -196,7 +226,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
         request.Sign(ctx.Key);
 
-        var response = await client.PutSingleAsync(request, null, ctx.Deadline, ctx.CancellationToken);
+        var response = await client.PutSingleAsync(request, null, ctx.Deadline, ctx.CancellationToken).ConfigureAwait(false);
 
         Verifier.CheckResponse(response);
 
@@ -207,7 +237,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
     {
         var ctx = args.Context!;
 
-        var tokenRaw = await GetOrCreateSession(args, ctx);
+        var tokenRaw = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
         var token = new FrostFsSessionToken(tokenRaw.Serialize());
 
         args.SessionToken = token;
@@ -224,7 +254,9 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
         if (args.MaxObjectSizeCache == 0)
         {
-            var networkSettings = await Context.Client.GetNetworkSettingsAsync(new PrmNetworkSettings() { Context = ctx });
+            var networkSettings = await Context.Client.GetNetworkSettingsAsync(new PrmNetworkSettings() { Context = ctx })
+                .ConfigureAwait(false);
+
             args.MaxObjectSizeCache = (int)networkSettings.MaxObjectSize;
         }
 
@@ -238,23 +270,20 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
         List<FrostFsObjectId> sentObjectIds = new(objectsCount);
 
         FrostFsSplit? split = null;
+        SplitId splitId = new();
 
         // keep attributes for the large object
         var attributes = args.Header!.Attributes;
+        args.Header!.Attributes = null;
 
         // send all parts except the last one as separate Objects
         while (restBytes > (ulong)args.MaxObjectSizeCache)
         {
-            if (split == null)
+            split = new FrostFsSplit(splitId, sentObjectIds.LastOrDefault());
-            {
-                split = new FrostFsSplit();
-                args.Header!.Attributes = [];                
-            }
 
-            split!.Previous = sentObjectIds.LastOrDefault();
             args.Header!.Split = split;
 
-            var result = await PutStreamObject(args);
+            var result = await PutStreamObject(args).ConfigureAwait(false);
 
             sentObjectIds.Add(result.ObjectId);
 
@@ -264,26 +293,30 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
         // send the last part and create linkObject
         if (sentObjectIds.Count > 0)
         {
-            var largeObjectHeader = new FrostFsObjectHeader(header.ContainerId) { PayloadLength = fullLength };
+            var largeObjectHeader = new FrostFsObjectHeader(header.ContainerId, FrostFsObjectType.Regular, [.. attributes])
-
+            {
-            largeObjectHeader.Attributes.AddRange(attributes);
+                PayloadLength = fullLength,
+            };
 
             args.Header.Split!.ParentHeader = largeObjectHeader;
 
-            var result = await PutStreamObject(args);
+            var result = await PutStreamObject(args).ConfigureAwait(false);
 
             sentObjectIds.Add(result.ObjectId);
 
-            var linkObject = new FrostFsLinkObject(header.ContainerId, split!.SplitId, largeObjectHeader)
+            var linkObject = new FrostFsLinkObject(header.ContainerId, split!.SplitId, largeObjectHeader, sentObjectIds);
-                .AddChildren(sentObjectIds);
 
-            _ = await PutSingleObjectAsync(new PrmSingleObjectPut(linkObject) { Context = args.Context});
+            _ = await PutSingleObjectAsync(new PrmSingleObjectPut(linkObject) { Context = args.Context }).ConfigureAwait(false);
 
-            return split.Parent!;
+            var parentHeader = args.Header.GetHeader();
+
+            return parentHeader.Split!.Parent.ToModel();
         }
 
         // We are here if the payload is placed to one Object. It means no cut action, just simple PUT.
-        var singlePartResult = await PutStreamObject(args);
+        args.Header!.Attributes = attributes;
+
+        var singlePartResult = await PutStreamObject(args).ConfigureAwait(false);
 
         return singlePartResult.ObjectId;
     }
@@ -297,6 +330,9 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
     private async Task<PutObjectResult> PutStreamObject(PrmObjectPut args)
     {
         var ctx = args.Context!;
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         var payload = args.Payload!;
 
         var chunkSize = args.BufferMaxSize > 0 ? args.BufferMaxSize : Constants.ObjectChunkSize;
@@ -316,7 +352,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
             }
             else
             {
-                chunkBuffer = env.GetArrayPool(Constants.ObjectChunkSize).Rent(chunkSize);
+                chunkBuffer = Context.GetArrayPool(Constants.ObjectChunkSize).Rent(chunkSize);
                 isRentBuffer = true;
             }
 
@@ -325,7 +361,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
             // 0 means no limit from client, so server side cut is performed
             var objectLimitSize = args.ClientCut ? args.MaxObjectSizeCache : 0;
 
-            var stream = await GetUploadStream(args, ctx);
+            using var stream = await GetUploadStream(args, ctx).ConfigureAwait(false);
 
             while (objectLimitSize == 0 || sentBytes < objectLimitSize)
             {
@@ -334,7 +370,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
                     (int)Math.Min(objectLimitSize - sentBytes, chunkSize)
                     : chunkSize;
 
-                var bytesCount = await payload.ReadAsync(chunkBuffer, 0, bufferSize, ctx.CancellationToken);
+                var bytesCount = await payload.ReadAsync(chunkBuffer, 0, bufferSize, ctx.CancellationToken).ConfigureAwait(false);
 
                 if (bytesCount == 0)
                     break;
@@ -351,10 +387,10 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
                 chunkRequest.Sign(ctx.Key);
 
-                await stream.Write(chunkRequest);
+                await stream.Write(chunkRequest).ConfigureAwait(false);
             }
 
-            var response = await stream.Close();
+            var response = await stream.Close().ConfigureAwait(false);
             Verifier.CheckResponse(response);
 
             return new PutObjectResult(FrostFsObjectId.FromHash(response.Body.ObjectId.Value.ToByteArray()), sentBytes);
@@ -372,6 +408,9 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
     {
         var header = args.Header!;
 
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         header.OwnerId ??= ctx.OwnerId;
         header.Version ??= ctx.Version;
 
@@ -395,7 +434,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx);
+        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
 
         sessionToken.CreateObjectTokenContext(
             new Address { ContainerId = grpcHeader.ContainerId, ObjectId = oid },
@@ -407,14 +446,14 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
         initRequest.Sign(ctx.Key);
 
-        return await PutObjectInit(initRequest, ctx);
+        return await PutObjectInit(initRequest, ctx).ConfigureAwait(false);
     }
 
     private async Task<FrostFsObject> GetObject(GetRequest request, Context ctx)
     {
         var reader = GetObjectInit(request, ctx);
 
-        var grpcObject = await reader.ReadHeader();
+        var grpcObject = await reader.ReadHeader().ConfigureAwait(false);
         var modelObject = grpcObject.ToModel();
 
         modelObject.ObjectReader = reader;
@@ -441,7 +480,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
         var call = client.Put(null, ctx.Deadline, ctx.CancellationToken);
 
-        await call.RequestStream.WriteAsync(initRequest);
+        await call.RequestStream.WriteAsync(initRequest).ConfigureAwait(false);
 
         return new ObjectStreamer(call);
     }
@@ -452,7 +491,7 @@ internal class ObjectServiceProvider(ObjectService.ObjectServiceClient client, C
 
         while (true)
         {
-            var ids = await stream.Read(ctx.CancellationToken);
+            var ids = await stream.Read(ctx.CancellationToken).ConfigureAwait(false);
 
             if (ids == null)
                 break;

src/FrostFS.SDK.ClientV2/Services/SessionServiceProvider.cs

@@ -1,17 +1,17 @@
 using System.Threading.Tasks;
 
-using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.ClientV2;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.Session;
 
 namespace FrostFS.SDK.ClientV2;
 
-internal class SessionServiceProvider : ContextAccessor
+internal sealed class SessionServiceProvider : ContextAccessor
 {
     private readonly SessionService.SessionServiceClient? _sessionServiceClient;
 
     internal SessionServiceProvider(SessionService.SessionServiceClient? sessionServiceClient, ClientEnvironment context)
-        : base (context)
+        : base(context)
     {
         _sessionServiceClient = sessionServiceClient;
     }
@@ -19,19 +19,22 @@ internal class SessionServiceProvider : ContextAccessor
     internal async Task<SessionToken> CreateSessionAsync(PrmSessionCreate args)
     {
         var ctx = args.Context!;
+
+        ctx.OwnerId ??= Context.Owner;
+
         var request = new CreateRequest
         {
             Body = new CreateRequest.Types.Body
             {
-                OwnerId = ctx.OwnerId.ToMessage(),
+                OwnerId = ctx.OwnerId!.ToMessage(),
                 Expiration = args.Expiration
             }
         };
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key);
+        request.Sign(ctx.Key!);
 
-        return await CreateSession(request, args.Context!);
+        return await CreateSession(request, args.Context!).ConfigureAwait(false);
     }
 
     internal async Task<SessionToken> CreateSession(CreateRequest request, Context ctx)

src/FrostFS.SDK.ClientV2/Services/Shared/ApeManagerServiceProvider.cs

@@ -5,12 +5,12 @@ using Frostfs.V2.Apemanager;
 
 namespace FrostFS.SDK.ClientV2;
 
-internal class ApeManagerServiceProvider : ContextAccessor
+internal sealed class ApeManagerServiceProvider : ContextAccessor
 {
     private readonly APEManagerService.APEManagerServiceClient? _apeManagerServiceClient;
 
     internal ApeManagerServiceProvider(APEManagerService.APEManagerServiceClient? apeManagerServiceClient, ClientEnvironment context)
-        : base (context)
+        : base(context)
     {
         _apeManagerServiceClient = apeManagerServiceClient;
     }
@@ -18,12 +18,16 @@ internal class ApeManagerServiceProvider : ContextAccessor
     internal async Task<byte[]> AddChainAsync(PrmApeChainAdd args)
     {
         var ctx = args.Context!;
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
 
         AddChainRequest request = new()
         {
             Body = new()
             {
-                Chain = new () { Raw = args.Chain.GetRaw() },
+                Chain = new() { Raw = args.Chain.GetRaw() },
                 Target = args.Target.GetChainTarget()
             }
         };
@@ -41,6 +45,11 @@ internal class ApeManagerServiceProvider : ContextAccessor
     internal async Task RemoveChainAsync(PrmApeChainRemove args)
     {
         var ctx = args.Context!;
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         RemoveChainRequest request = new()
         {
             Body = new()
@@ -61,6 +70,11 @@ internal class ApeManagerServiceProvider : ContextAccessor
     internal async Task<Chain[]> ListChainAsync(PrmApeChainList args)
     {
         var ctx = args.Context!;
+        ctx.Key ??= Context.Key?.ECDsaKey;
+
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         ListChainsRequest request = new()
         {
             Body = new()

src/FrostFS.SDK.ClientV2/Services/Shared/SessionProvider.cs

@@ -7,13 +7,14 @@ internal interface ISessionProvider
     ValueTask<Session.SessionToken> GetOrCreateSession(ISessionToken args, Context ctx);
 }
 
-internal class SessionProvider(ClientEnvironment env)
+internal sealed class SessionProvider(ClientEnvironment env)
 {
     public async ValueTask<Session.SessionToken> GetOrCreateSession(ISessionToken args, Context ctx)
     {
         if (args.SessionToken is null)
         {
-            return await env.Client.CreateSessionInternalAsync(new PrmSessionCreate(uint.MaxValue) { Context = ctx });
+            return await env.Client.CreateSessionInternalAsync(new PrmSessionCreate(uint.MaxValue) { Context = ctx })
+                .ConfigureAwait(false);
         }
 
         return new Session.SessionToken().Deserialize(args.SessionToken.Token);

src/FrostFS.SDK.ClientV2/Tools/ClientEnvironment.cs

@@ -6,9 +6,9 @@ using Grpc.Net.Client;
 
 namespace FrostFS.SDK.ClientV2;
 
-public class ClientEnvironment(Client client, ECDsa? key, FrostFsOwner? owner, GrpcChannel channel, FrostFsVersion version) : IDisposable
+public class ClientEnvironment(FrostFSClient client, ECDsa? key, FrostFsOwner? owner, GrpcChannel channel, FrostFsVersion version) : IDisposable
 {
-    private ArrayPool<byte> _arrayPool;
+    private ArrayPool<byte>? _arrayPool;
 
     internal FrostFsOwner? Owner { get; } = owner;
 
@@ -18,7 +18,7 @@ public class ClientEnvironment(Client client, ECDsa? key, FrostFsOwner? owner, G
 
     internal NetworkSettings? NetworkSettings { get; set; }
 
-    internal Client Client { get; } = client;
+    internal FrostFSClient Client { get; } = client;
 
     internal ClientKey? Key { get; } = key != null ? new ClientKey(key) : null;
 

src/FrostFS.SDK.ClientV2/Tools/Object.cs

@@ -1,57 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-namespace FrostFS.SDK.ClientV2.Extensions;
-
-public static class ObjectExtensions
-{
-    public static FrostFsObject SetPayloadLength(this FrostFsObject obj, ulong length)
-    {
-        obj.Header.PayloadLength = length;
-        return obj;
-    }
-
-    public static FrostFsObject SetPayload(this FrostFsObject obj, byte[] bytes)
-    {
-        obj.Payload = bytes;
-        return obj;
-    }
-
-    public static FrostFsObject AddAttribute(this FrostFsObject obj, string key, string value)
-    {
-        obj.AddAttribute(new FrostFsAttribute(key, value));
-        return obj;
-    }
-
-    public static FrostFsObject AddAttribute(this FrostFsObject obj, FrostFsAttribute attribute)
-    {
-        obj.Header.Attributes.Add(attribute);
-        return obj;
-    }
-
-    public static FrostFsObject AddAttributes(this FrostFsObject obj, IEnumerable<FrostFsAttribute> attributes)
-    {
-        obj.Header.Attributes.AddRange(attributes);
-        return obj;
-    }
-
-    public static FrostFsObject SetSplit(this FrostFsObject obj, FrostFsSplit? split)
-    {
-        obj.Header.Split = split;
-        return obj;
-    }
-
-    public static FrostFsLinkObject AddChildren(this FrostFsLinkObject linkObject, IEnumerable<FrostFsObjectId> objectIds)
-    {
-        linkObject.Header.Split!.Children.AddRange(objectIds);
-        return linkObject;
-    }
-
-    public static FrostFsObject CalculateObjectId(this FrostFsObject obj)
-    {
-        if (obj.Header == null)
-            throw new MissingFieldException("Header cannot be null");
-
-        return obj;
-    }
-}

src/FrostFS.SDK.ClientV2/Tools/ObjectReader.cs

@@ -1,22 +1,22 @@
 using System;
+using System.Threading;
 using System.Threading.Tasks;
 
+using FrostFS.Object;
+
 using Grpc.Core;
 
-using FrostFS.Object;
-using System.Threading;
-
 namespace FrostFS.SDK.ClientV2;
 
-public class ObjectReader(AsyncServerStreamingCall<GetResponse> call) : IObjectReader
+public sealed class ObjectReader(AsyncServerStreamingCall<GetResponse> call) : IObjectReader
 {
-    private bool disposed = false;
+    private bool disposed;
 
     public AsyncServerStreamingCall<GetResponse> Call { get; private set; } = call;
 
     internal async Task<Object.Object> ReadHeader()
     {
-        if (!await Call.ResponseStream.MoveNext())
+        if (!await Call.ResponseStream.MoveNext().ConfigureAwait(false))
             throw new InvalidOperationException("unexpected end of stream");
 
         var response = Call.ResponseStream.Current;
@@ -34,7 +34,7 @@ public class ObjectReader(AsyncServerStreamingCall<GetResponse> call) : IObjectR
 
     public async Task<ReadOnlyMemory<byte>?> ReadChunk(CancellationToken cancellationToken = default)
     {
-        if (!await Call.ResponseStream.MoveNext(cancellationToken))
+        if (!await Call.ResponseStream.MoveNext(cancellationToken).ConfigureAwait(false))
             return null;
 
         var response = Call.ResponseStream.Current;

src/FrostFS.SDK.ClientV2/Tools/ObjectStreamer.cs

@@ -1,13 +1,13 @@
 using System;
 using System.Threading.Tasks;
 
-using Grpc.Core;
-
 using FrostFS.Object;
 
+using Grpc.Core;
+
 namespace FrostFS.SDK.ClientV2;
 
-internal class ObjectStreamer(AsyncClientStreamingCall<PutRequest, PutResponse> call) : IDisposable
+internal sealed class ObjectStreamer(AsyncClientStreamingCall<PutRequest, PutResponse> call) : IDisposable
 {
     public AsyncClientStreamingCall<PutRequest, PutResponse> Call { get; private set; } = call;
 
@@ -18,14 +18,14 @@ internal class ObjectStreamer(AsyncClientStreamingCall<PutRequest, PutResponse>
             throw new ArgumentNullException(nameof(request));
         }
 
-        await Call.RequestStream.WriteAsync(request);
+        await Call.RequestStream.WriteAsync(request).ConfigureAwait(false);
     }
 
     public async Task<PutResponse> Close()
     {
-        await Call.RequestStream.CompleteAsync();
+        await Call.RequestStream.CompleteAsync().ConfigureAwait(false);
 
-        return await Call.ResponseAsync;
+        return await Call.ResponseAsync.ConfigureAwait(false);
     }
 
     public void Dispose()

src/FrostFS.SDK.ClientV2/Tools/ObjectTools.cs

@@ -1,15 +1,15 @@
 using System.Linq;
 
-using Google.Protobuf;
-
 using FrostFS.Object;
 using FrostFS.Refs;
 using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.Cryptography;
 
+using Google.Protobuf;
+
 namespace FrostFS.SDK.ClientV2;
 
-internal class ObjectTools
+internal static class ObjectTools
 {
     internal static FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header, Context ctx)
     {
@@ -21,15 +21,15 @@ internal class ObjectTools
         return new ObjectID { Value = grpcHeader.Sha256() }.ToModel();
     }
 
-    internal static  Object.Object CreateObject(FrostFsObject @object, Context ctx)
+    internal static Object.Object CreateObject(FrostFsObject @object, Context ctx)
     {
         @object.Header.OwnerId ??= ctx.OwnerId;
         @object.Header.Version ??= ctx.Version;
 
         var grpcHeader = @object.Header.GetHeader();
 
-        grpcHeader.PayloadLength = (ulong)@object.Payload.Length;
+        grpcHeader.PayloadLength = (ulong)@object.SingleObjectPayload.Length;
-        grpcHeader.PayloadHash = Sha256Checksum(@object.Payload);
+        grpcHeader.PayloadHash = Sha256Checksum(@object.SingleObjectPayload);
 
         var split = @object.Header.Split;
         if (split != null)
@@ -41,13 +41,13 @@ internal class ObjectTools
         {
             Header = grpcHeader,
             ObjectId = new ObjectID { Value = grpcHeader.Sha256() },
-            Payload = ByteString.CopyFrom(@object.Payload)
+            Payload = ByteString.CopyFrom(@object.SingleObjectPayload)
         };
 
-        obj.Signature = new Refs.Signature
+        obj.Signature = new Signature
         {
             Key = ctx.GetPublicKeyCache(),
-            Sign = ByteString.CopyFrom(ctx.Key.SignData(obj.ObjectId.ToByteArray())),
+            Sign = ByteString.CopyFrom(ctx.Key!.SignData(obj.ObjectId.ToByteArray())),
         };
 
         return obj;
@@ -58,6 +58,9 @@ internal class ObjectTools
         if (split == null)
             return;
 
+        if (ctx.Key == null)
+            throw new InvalidObjectException(nameof(ctx.Key));
+
         grpcHeader.Split = new Header.Types.Split
         {
             SplitId = split.SplitId?.GetSplitId()
@@ -72,13 +75,11 @@ internal class ObjectTools
 
             grpcHeader.Split.Parent = new ObjectID { Value = grpcParentHeader.Sha256() };
             grpcHeader.Split.ParentHeader = grpcParentHeader;
-            grpcHeader.Split.ParentSignature = new Refs.Signature
+            grpcHeader.Split.ParentSignature = new Signature
             {
                 Key = ctx.GetPublicKeyCache(),
                 Sign = ByteString.CopyFrom(ctx.Key.SignData(grpcHeader.Split.Parent.ToByteArray())),
             };
-
-            split.Parent = grpcHeader.Split.Parent.ToModel();
         }
 
         grpcHeader.Split.Previous = split.Previous?.ToMessage();

src/FrostFS.SDK.ClientV2/Tools/Range.cs

@@ -119,9 +119,9 @@ namespace System
         public override string ToString()
         {
             if (IsFromEnd)
-                return "^" + ((uint)Value).ToString();
+                return $"^{(uint)Value}";
 
-            return ((uint)Value).ToString();
+            return $"{(uint)Value}";
         }
     }
 

src/FrostFS.SDK.ClientV2/Tools/RequestConstructor.cs

@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Specialized;
 using System.Linq;
 using System.Security.Cryptography;
@@ -12,8 +13,13 @@ namespace FrostFS.SDK.ClientV2;
 
 public static class RequestConstructor
 {
-    public static void AddMetaHeader(this IRequest request, NameValueCollection? xHeaders, Session.SessionToken? sessionToken = null)
+    public static void AddMetaHeader(this IRequest request,
+        NameValueCollection? xHeaders,
+        SessionToken? sessionToken = null)
     {
+        if (request is null)
+            throw new ArgumentNullException(nameof(request));
+
         if (request.MetaHeader is not null)
             return;
 
@@ -28,11 +34,21 @@ public static class RequestConstructor
                      (k, v) => new XHeader { Key = k, Value = v }));
     }
 
-    public static void CreateObjectTokenContext(this Session.SessionToken sessionToken, 
+    public static void CreateObjectTokenContext(this SessionToken sessionToken,
         Address address,
         ObjectSessionContext.Types.Verb verb,
         ECDsa key)
     {
+        if (sessionToken is null)
+        {
+            throw new ArgumentNullException(nameof(sessionToken));
+        }
+
+        if (address is null)
+        {
+            throw new ArgumentNullException(nameof(address));
+        }
+
         if (sessionToken.Body.Object?.Target != null)
             return;
 
@@ -52,7 +68,7 @@ public static class RequestConstructor
         sessionToken.Signature = key.SignMessagePart(sessionToken.Body);
     }
 
-    public static void CreateContainerTokenContext(this Session.SessionToken sessionToken,
+    internal static void CreateContainerTokenContext(this SessionToken sessionToken,
        ContainerID? containerId,
        ContainerSessionContext.Types.Verb verb,
        ECDsa key,
@@ -61,7 +77,7 @@ public static class RequestConstructor
         if (sessionToken.Body.Container?.ContainerId != null)
             return;
 
-        sessionToken.Body.Container = new (){ Verb = verb };
+        sessionToken.Body.Container = new() { Verb = verb };
 
         if (containerId != null)
             sessionToken.Body.Container.ContainerId = containerId;

src/FrostFS.SDK.ClientV2/Tools/RequestSigner.cs

@@ -18,10 +18,20 @@ namespace FrostFS.SDK.ClientV2;
 
 public static class RequestSigner
 {
-    public const int RFC6979SignatureSize = 64;
+    internal const int RFC6979SignatureSize = 64;
 
-    public static byte[] SignRFC6979(this ECDsa key, byte[] data)
+    internal static byte[] SignRFC6979(this ECDsa key, byte[] data)
     {
+        if (key is null)
+        {
+            throw new ArgumentNullException(nameof(key));
+        }
+
+        if (data is null)
+        {
+            throw new ArgumentNullException(nameof(data));
+        }
+
         var digest = new Sha256Digest();
         var secp256R1 = SecNamedCurves.GetByName("secp256r1");
         var ecParameters = new ECDomainParameters(secp256R1.Curve, secp256R1.G, secp256R1.N);
@@ -46,7 +56,7 @@ public static class RequestSigner
         return signature;
     }
 
-    public static SignatureRFC6979 SignRFC6979(this ECDsa key, IMessage message)
+    internal static SignatureRFC6979 SignRFC6979(this ECDsa key, IMessage message)
     {
         return new SignatureRFC6979
         {
@@ -55,7 +65,7 @@ public static class RequestSigner
         };
     }
 
-    public static SignatureRFC6979 SignRFC6979(this ECDsa key, ByteString data)
+    internal static SignatureRFC6979 SignRFC6979(this ECDsa key, ByteString data)
     {
         return new SignatureRFC6979
         {
@@ -74,7 +84,7 @@ public static class RequestSigner
         return hash;
     }
 
-    public static Signature SignMessagePart(this ECDsa key, IMessage? data)
+    internal static Signature SignMessagePart(this ECDsa key, IMessage? data)
     {
         var data2Sign = data is null ? [] : data.ToByteArray();
         var sig = new Signature
@@ -86,7 +96,7 @@ public static class RequestSigner
         return sig;
     }
 
-    public static void Sign(this IVerifiableMessage message, ECDsa key)
+    internal static void Sign(this IVerifiableMessage message, ECDsa key)
     {
         var meta = message.GetMetaHeader();
         IVerificationHeader verify = message switch

src/FrostFS.SDK.ClientV2/Tools/SearchReader.cs

@@ -11,13 +11,13 @@ using Grpc.Core;
 
 namespace FrostFS.SDK.ClientV2;
 
-internal class SearchReader(AsyncServerStreamingCall<SearchResponse> call) : IDisposable
+internal sealed class SearchReader(AsyncServerStreamingCall<SearchResponse> call) : IDisposable
 {
     public AsyncServerStreamingCall<SearchResponse> Call { get; private set; } = call;
 
     public async Task<List<ObjectID>?> Read(CancellationToken cancellationToken)
     {
-        if (!await Call.ResponseStream.MoveNext(cancellationToken))
+        if (!await Call.ResponseStream.MoveNext(cancellationToken).ConfigureAwait(false))
             return null;
 
         var response = Call.ResponseStream.Current;

src/FrostFS.SDK.ClientV2/Tools/Verifier.cs

@@ -55,11 +55,25 @@ public static class Verifier
 
     public static bool VerifyRFC6979(this SignatureRFC6979 signature, IMessage message)
     {
+        if (signature is null)
+        {
+            throw new ArgumentNullException(nameof(signature));
+        }
+
         return signature.Key.ToByteArray().VerifyRFC6979(message.ToByteArray(), signature.Sign.ToByteArray());
     }
 
     public static bool VerifyData(this ECDsa key, byte[] data, byte[] sig)
     {
+        if (key is null)
+            throw new ArgumentNullException(nameof(key));
+
+        if (data is null)
+            throw new ArgumentNullException(nameof(data));
+
+        if (sig is null)
+            throw new ArgumentNullException(nameof(sig));
+
         return key.VerifyHash(data.Sha512(), sig[1..]);
     }
 
@@ -74,7 +88,7 @@ public static class Verifier
         return key.VerifyData(data2Verify, sig.Sign.ToByteArray());
     }
 
-    public static bool VerifyMatryoskaLevel(IMessage body, IMetaHeader meta, IVerificationHeader verification)
+    internal static bool VerifyMatryoskaLevel(IMessage body, IMetaHeader meta, IVerificationHeader verification)
     {
         if (!verification.MetaSignature.VerifyMessagePart(meta))
             return false;
@@ -92,10 +106,15 @@ public static class Verifier
 
     public static bool Verify(this IVerifiableMessage message)
     {
+        if (message is null)
+        {
+            throw new ArgumentNullException(nameof(message));
+        }
+
         return VerifyMatryoskaLevel(message.GetBody(), message.GetMetaHeader(), message.GetVerificationHeader());
     }
 
-    public static void CheckResponse(IResponse resp)
+    internal static void CheckResponse(IResponse resp)
     {
         if (!resp.Verify())
             throw new FormatException($"invalid response, type={resp.GetType()}");
@@ -112,6 +131,11 @@ public static class Verifier
     /// <param name="request">Created by SDK request to gRpc proxy</param>
     public static void CheckRequest(IRequest request)
     {
+        if (request is null)
+        {
+            throw new ArgumentNullException(nameof(request));
+        }
+
         if (!request.Verify())
             throw new FormatException($"invalid response, type={request.GetType()}");
     }

src/FrostFS.SDK.ClientV2/Ростелеком.txt

@@ -0,0 +1,8 @@
+Для возврата денег потребуются документы:
+1. Заполненное заявление
+Форму заявления можно скачать с сайта
+Шаблон заявления скачайте на сайте rt.ru. Внизу страницы перейдите в Договоры и соглашения -> «Бланки и заявления»
+2. Скан-фото паспорта владельца договора (2, 3, 5 страница: кем и когда выдан, адрес регистрации)
+3. Реквизиты счета владельца, выданные банком, на которые будет выполнен возврат
+4. Чек об оплате
+Сканы документов должны быть хорошо читаемые

src/FrostFS.SDK.Cryptography/Base58.cs

@@ -44,6 +44,9 @@ public static class Base58
 
     public static byte[] Decode(string input)
     {
+        if (input == null)
+            throw new ArgumentNullException(nameof(input));
+
         // Decode Base58 string to BigInteger 
         var bi = BigInteger.Zero;
         for (int i = 0; i < input.Length; i++)
@@ -61,7 +64,7 @@ public static class Base58
         if (bi.IsZero)
             return leadingZeros;
 
-        var bytesBigEndian = bi.ToByteArray().Reverse();
+        var bytesBigEndian = bi.ToByteArray().Reverse().ToArray();
 
         var firstNonZeroIndex = 0;
 

src/FrostFS.SDK.Cryptography/Extentions.cs

@@ -1,17 +1,19 @@
-using Google.Protobuf;
-using Org.BouncyCastle.Crypto.Digests;
 using System.Security.Cryptography;
 using System.Threading;
 
+using Google.Protobuf;
+
+using Org.BouncyCastle.Crypto.Digests;
+
 namespace FrostFS.SDK.Cryptography;
 
 public static class Extentions
 {
     private static readonly SHA256 _sha256 = SHA256.Create();
-    private static SpinLock _spinlockSha256 = new();
+    private static SpinLock _spinlockSha256;
 
     private static readonly SHA512 _sha512 = SHA512.Create();
-    private static SpinLock _spinlockSha512 = new();
+    private static SpinLock _spinlockSha512;
 
     internal static byte[] RIPEMD160(this byte[] value)
     {

src/FrostFS.SDK.Cryptography/FrostFS.SDK.Cryptography.csproj

@@ -13,6 +13,10 @@
   <ItemGroup>
     <PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />
     <PackageReference Include="Google.Protobuf" Version="3.27.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="8.0.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="System.Memory" Version="4.5.5" />
   </ItemGroup>
 

src/FrostFS.SDK.Cryptography/Key.cs

@@ -20,6 +20,9 @@ public static class KeyExtension
 
     public static byte[] Compress(this byte[] publicKey)
     {
+        if (publicKey == null)
+            throw new ArgumentNullException(nameof(publicKey));
+
         if (publicKey.Length != UncompressedPublicKeyLength)
             throw new FormatException(
                 $"{nameof(Compress)} argument isn't uncompressed public key. " +
@@ -34,6 +37,9 @@ public static class KeyExtension
 
     public static byte[] Decompress(this byte[] publicKey)
     {
+        if (publicKey == null)
+            throw new ArgumentNullException(nameof(publicKey));
+
         if (publicKey.Length != CompressedPublicKeyLength)
             throw new FormatException(
                 $"{nameof(Decompress)} argument isn't compressed public key. " +
@@ -64,6 +70,9 @@ public static class KeyExtension
 
     public static byte[] GetScriptHash(this byte[] publicKey)
     {
+        if (publicKey == null)
+            throw new ArgumentNullException(nameof(publicKey));
+
         var script = publicKey.CreateSignatureRedeemScript();
         return script.Sha256().RIPEMD160();
     }
@@ -100,6 +109,9 @@ public static class KeyExtension
 
     public static string PublicKeyToAddress(this byte[] publicKey)
     {
+        if (publicKey == null)
+            throw new ArgumentNullException(nameof(publicKey));
+
         if (publicKey.Length != CompressedPublicKeyLength)
             throw new FormatException(
                 nameof(publicKey) +
@@ -112,6 +124,9 @@ public static class KeyExtension
 
     public static byte[] PublicKey(this ECDsa key)
     {
+        if (key == null)
+            throw new ArgumentNullException(nameof(key));
+
         var param = key.ExportParameters(false);
         var pubkey = new byte[33];
         var pos = 33 - param.Q.X.Length;
@@ -127,6 +142,9 @@ public static class KeyExtension
 
     public static byte[] PrivateKey(this ECDsa key)
     {
+        if (key == null)
+            throw new ArgumentNullException(nameof(key));
+
         return key.ExportParameters(true).D;
     }
 

src/FrostFS.SDK.Cryptography/Range.cs

@@ -122,9 +122,9 @@ namespace System
         public override string ToString()
         {
             if (IsFromEnd)
-                return "^" + ((uint)Value).ToString();
+                return $"^{(uint)Value}";
 
-            return ((uint)Value).ToString();
+            return $"{(uint)Value}";
         }
     }
 
@@ -140,7 +140,7 @@ namespace System
     /// <remarks>Construct a Range object using the start and end indexes.</remarks>
     /// <param name="start">Represent the inclusive start index of the range.</param>
     /// <param name="end">Represent the exclusive end index of the range.</param>
-    internal readonly struct Range (Index start, Index end) : IEquatable<Range>
+    internal readonly struct Range(Index start, Index end) : IEquatable<Range>
     {
         /// <summary>Represent the inclusive start index of the Range.</summary>
         public Index Start { get; } = start;

src/FrostFS.SDK.Cryptography/UUID.cs

@@ -1,5 +1,6 @@
-using Google.Protobuf;
+using System;
-using System;
+
+using Google.Protobuf;
 
 namespace FrostFS.SDK.Cryptography;
 
@@ -7,6 +8,9 @@ public static class UUIDExtension
 {
     public static Guid ToUuid(this ByteString id)
     {
+        if (id == null)
+            throw new ArgumentNullException(nameof(id));
+
         var bytes = id.ToByteArray();
 
         var orderedBytes = GetGuidBytesDirectOrder(bytes);

src/FrostFS.SDK.ProtosV2/Interfaces/IVerificationHeader.cs

@@ -1,4 +1,5 @@
 using FrostFS.Refs;
+
 using Google.Protobuf;
 
 namespace FrostFS.Session;

src/FrostFS.SDK.ProtosV2/apemanager/Extension.Message.cs

@@ -1,7 +1,7 @@
-using Google.Protobuf;
-
-using FrostFS.Session;
 using FrostFS.SDK.ProtosV2.Interfaces;
+using FrostFS.Session;
+
+using Google.Protobuf;
 
 namespace Frostfs.V2.Apemanager;
 

src/FrostFS.SDK.ProtosV2/container/Extension.Message.cs

@@ -1,7 +1,7 @@
-using Google.Protobuf;
-
-using FrostFS.Session;
 using FrostFS.SDK.ProtosV2.Interfaces;
+using FrostFS.Session;
+
+using Google.Protobuf;
 
 namespace FrostFS.Container;
 

src/FrostFS.SDK.ProtosV2/netmap/Extension.Message.cs

@@ -1,5 +1,6 @@
 using FrostFS.SDK.ProtosV2.Interfaces;
 using FrostFS.Session;
+
 using Google.Protobuf;
 
 namespace FrostFS.Netmap;

src/FrostFS.SDK.ProtosV2/object/Extension.Message.cs

@@ -1,6 +1,8 @@
 using System.Diagnostics;
+
 using FrostFS.SDK.ProtosV2.Interfaces;
 using FrostFS.Session;
+
 using Google.Protobuf;
 
 namespace FrostFS.Object
@@ -117,7 +119,7 @@ namespace FrostFS.Object
         }
     }
 
-     public partial class PutSingleRequest : IRequest
+    public partial class PutSingleRequest : IRequest
     {
         IMetaHeader IVerifiableMessage.GetMetaHeader()
         {

src/FrostFS.SDK.ProtosV2/session/Extension.Message.cs

@@ -1,4 +1,5 @@
 using FrostFS.SDK.ProtosV2.Interfaces;
+
 using Google.Protobuf;
 
 namespace FrostFS.Session;

src/FrostFS.SDK.Tests/ContainerTest.cs

@@ -1,12 +1,12 @@
 using FrostFS.SDK.ClientV2;
-using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.ClientV2.Interfaces;
-using FrostFS.SDK.ClientV2;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.Cryptography;
 
-using Microsoft.Extensions.Options;
 using Google.Protobuf;
 
+using Microsoft.Extensions.Options;
+
 namespace FrostFS.SDK.Tests;
 
 public abstract class ContainerTestsBase
@@ -34,7 +34,7 @@ public abstract class ContainerTestsBase
 
     protected IFrostFSClient GetClient()
     {
-        return ClientV2.Client.GetTestInstance(
+        return ClientV2.FrostFSClient.GetTestInstance(
             Settings,
             null,
             new NetworkMocker(this.key).GetMock().Object,
@@ -49,13 +49,13 @@ public class ContainerTest : ContainerTestsBase
     [Fact]
     public async void CreateContainerTest()
     {
-        var param = new PrmContainerCreate(new FrostFsContainerInfo(BasicAcl.PublicRW, Mocker.PlacementPolicy));
+        var param = new PrmContainerCreate(new FrostFsContainerInfo(Mocker.PlacementPolicy));
 
         var result = await GetClient().CreateContainerAsync(param);
 
         Assert.NotNull(result);
-        Assert.NotNull(result.Value);
+        Assert.NotNull(result.GetValue());
-        Assert.True(Base58.Encode(Mocker.ContainerGuid.ToBytes()) == result.Value);
+        Assert.True(Base58.Encode(Mocker.ContainerGuid.ToBytes()) == result.GetValue());
     }
 
     [Fact]
@@ -63,14 +63,11 @@ public class ContainerTest : ContainerTestsBase
     {
         var cid = new FrostFsContainerId(Base58.Encode(Mocker.ContainerGuid.ToBytes()));
 
-        Mocker.Acl = BasicAcl.PublicRO;
-
         var result = await GetClient().GetContainerAsync(new PrmContainerGet(cid));
 
         Assert.NotNull(result);
-        Assert.Equal(Mocker.Acl, result.BasicAcl);
         Assert.Equal(Mocker.ContainerGuid, result.Nonce);
-        Assert.Equal(0, Mocker.PlacementPolicy.CompareTo(result.PlacementPolicy));
+        Assert.Equal(Mocker.PlacementPolicy, result.PlacementPolicy);
         Assert.Equal(Mocker.Version.ToString(), result.Version!.ToString());
     }
 
@@ -89,7 +86,7 @@ public class ContainerTest : ContainerTestsBase
         await foreach (var cid in result)
         {
             var val = Base58.Encode(ByteString.CopyFrom(Mocker.ContainerIds[i++]).ToByteArray());
-            Assert.Equal(val, cid.Value);
+            Assert.Equal(val, cid.GetValue());
         }
 
         Assert.Equal(3, i);

src/FrostFS.SDK.Tests/MetricsInterceptor.cs

@@ -1,7 +1,7 @@
-using Grpc.Core;
+using System.Diagnostics;
-using Grpc.Core.Interceptors;
 
-using System.Diagnostics;
+using Grpc.Core;
+using Grpc.Core.Interceptors;
 
 namespace FrostFS.SDK.SmokeTests;
 

src/FrostFS.SDK.Tests/Mocks/AsyncStreamReaderMock.cs

@@ -20,7 +20,7 @@ public class AsyncStreamReaderMock(string key, FrostFsObjectHeader objectHeader)
         {
             var header = new Header
             {
-                ContainerId =  objectHeader.ContainerId.ToMessage(),
+                ContainerId = objectHeader.ContainerId.ToMessage(),
                 PayloadLength = objectHeader.PayloadLength,
                 Version = objectHeader.Version!.ToMessage(),
                 OwnerId = objectHeader.OwnerId!.ToMessage()

src/FrostFS.SDK.Tests/Mocks/ClientStreamWriter.cs

@@ -1,6 +1,7 @@
-using Grpc.Core;
 using FrostFS.SDK.ProtosV2.Interfaces;
 
+using Grpc.Core;
+
 namespace FrostFS.SDK.Tests;
 
 public class ClientStreamWriter : IClientStreamWriter<IRequest>

src/FrostFS.SDK.Tests/Mocks/ContainerServiceMocks/ContainerServiceBase.cs

@@ -1,15 +1,17 @@
 using System.Security.Cryptography;
-using FrostFS.Container;
-using Moq;
 
+using FrostFS.Container;
+using FrostFS.Object;
+using FrostFS.SDK.ClientV2;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.Cryptography;
 using FrostFS.Session;
+
 using Google.Protobuf;
 
-using FrostFS.SDK.ClientV2;
-using FrostFS.Object;
 using Grpc.Core;
-using FrostFS.SDK.ClientV2.Mappers.GRPC;
+
+using Moq;
 
 namespace FrostFS.SDK.Tests;
 
@@ -18,11 +20,9 @@ public abstract class ServiceBase(string key)
     public string StringKey { get; private set; } = key;
     public ECDsa Key { get; private set; } = key.LoadWif();
     public FrostFsVersion Version { get; set; } = DefaultVersion;
-    public BasicAcl Acl { get; set; } = DefaultAcl;
     public FrostFsPlacementPolicy PlacementPolicy { get; set; } = DefaultPlacementPolicy;
 
     public static FrostFsVersion DefaultVersion { get; } = new(2, 13);
-    public static BasicAcl DefaultAcl { get; } = BasicAcl.PublicRW;
     public static FrostFsPlacementPolicy DefaultPlacementPolicy { get; } = new FrostFsPlacementPolicy(true, new FrostFsReplica(1));
 
     public Metadata Metadata { get; protected set; }
@@ -61,21 +61,21 @@ public abstract class ServiceBase(string key)
     }
 
     public ResponseMetaHeader ResponseMetaHeader => new()
-        {
+    {
-            Version = Version.ToMessage(),
+        Version = Version.ToMessage(),
-            Epoch = 100,
+        Epoch = 100,
-            Ttl = 1
+        Ttl = 1
-        };
+    };
 }
 
-public abstract class ContainerServiceBase(string key) : ServiceBase (key)
+public abstract class ContainerServiceBase(string key) : ServiceBase(key)
 {
     public Guid ContainerGuid { get; set; } = Guid.NewGuid();
 
     public abstract Mock<ContainerService.ContainerServiceClient> GetMock();
 }
 
-public abstract class ObjectServiceBase(string key) : ServiceBase (key)
+public abstract class ObjectServiceBase(string key) : ServiceBase(key)
 {
     public abstract Mock<ObjectService.ObjectServiceClient> GetMock();
 

src/FrostFS.SDK.Tests/Mocks/ContainerServiceMocks/ContainerStub.cs

@@ -1,4 +1,5 @@
 using FrostFS.Container;
+
 using Moq;
 
 namespace FrostFS.SDK.Tests;

src/FrostFS.SDK.Tests/Mocks/ContainerServiceMocks/GetContainerMock.cs

@@ -1,14 +1,15 @@
 using FrostFS.Container;
-using Google.Protobuf;
-using Grpc.Core;
-using Moq;
-
-using FrostFS.SDK.Cryptography;
-using FrostFS.SDK.ClientV2;
-
-using FrostFS.SDK.ClientV2.Mappers.GRPC;
-using FrostFS.Session;
 using FrostFS.Refs;
+using FrostFS.SDK.ClientV2;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
+using FrostFS.SDK.Cryptography;
+using FrostFS.Session;
+
+using Google.Protobuf;
+
+using Grpc.Core;
+
+using Moq;
 
 namespace FrostFS.SDK.Tests;
 
@@ -67,8 +68,7 @@ public class ContainerMocker(string key) : ContainerServiceBase(key)
                 {
                     Version = grpcVersion,
                     Nonce = ByteString.CopyFrom(ContainerGuid.ToBytes()),
-                    BasicAcl = (uint)Acl,
+                    PlacementPolicy = PlacementPolicy.GetPolicy()
-                    PlacementPolicy = PlacementPolicy.ToMessage()
                 }
             },
             MetaHeader = ResponseMetaHeader
@@ -78,7 +78,7 @@ public class ContainerMocker(string key) : ContainerServiceBase(key)
 
         var getNoContainerResponse = new GetResponse
         {
-            Body = new (),
+            Body = new(),
             MetaHeader = new ResponseMetaHeader
             {
                 Status = new Status.Status

src/FrostFS.SDK.Tests/Mocks/ContainerServiceMocks/RequestData.cs

@@ -9,4 +9,3 @@ public class RequestData<T>(T request, Metadata m, DateTime? dt, CancellationTok
     public DateTime? Deadline => dt;
     public CancellationToken CancellationToken => ct;
 }
-       

src/FrostFS.SDK.Tests/Mocks/NetworkMocker.cs

@@ -1,8 +1,11 @@
-using Moq;
 using FrostFS.Netmap;
-using Grpc.Core;
+
 using Google.Protobuf;
 
+using Grpc.Core;
+
+using Moq;
+
 namespace FrostFS.SDK.Tests;
 
 public class NetworkMocker(string key) : ServiceBase(key)

src/FrostFS.SDK.Tests/Mocks/ObjectMock.cs

@@ -1,12 +1,16 @@
-using Google.Protobuf;
-using Grpc.Core;
-using Moq;
-using FrostFS.SDK.ClientV2;
-using FrostFS.Object;
-using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using System.Security.Cryptography;
+
+using FrostFS.Object;
+using FrostFS.SDK.ClientV2;
+using FrostFS.SDK.ClientV2.Mappers.GRPC;
 using FrostFS.SDK.Cryptography;
 
+using Google.Protobuf;
+
+using Grpc.Core;
+
+using Moq;
+
 namespace FrostFS.SDK.Tests;
 
 public class ObjectMocker(string key) : ObjectServiceBase(key)
@@ -195,7 +199,7 @@ public class ObjectMocker(string key) : ObjectServiceBase(key)
 
     public List<byte[]>? ResultObjectIds { get; set; }
 
-    public ClientStreamWriter? ClientStreamWriter { get; private set; } = new ();
+    public ClientStreamWriter? ClientStreamWriter { get; private set; } = new();
 
     public List<PutSingleRequest> PutSingleRequests { get; private set; } = [];
 

src/FrostFS.SDK.Tests/Mocks/SessionMock.cs

@@ -1,6 +1,9 @@
 using FrostFS.Session;
+
 using Google.Protobuf;
+
 using Grpc.Core;
+
 using Moq;
 
 namespace FrostFS.SDK.Tests;

src/FrostFS.SDK.Tests/NetworkTest.cs

@@ -1,3 +1,5 @@
+using System.Security.Cryptography;
+
 using FrostFS.Netmap;
 using FrostFS.SDK.ClientV2;
 using FrostFS.SDK.ClientV2.Interfaces;
@@ -8,8 +10,6 @@ using Google.Protobuf;
 
 using Microsoft.Extensions.Options;
 
-using System.Security.Cryptography;
-
 namespace FrostFS.SDK.Tests;
 
 public abstract class NetworkTestsBase
@@ -40,7 +40,7 @@ public abstract class NetworkTestsBase
 
     protected IFrostFSClient GetClient()
     {
-        return ClientV2.Client.GetTestInstance(
+        return ClientV2.FrostFSClient.GetTestInstance(
             Settings,
             null,
             Mocker.GetMock().Object,
@@ -142,13 +142,13 @@ public class NetworkTest : NetworkTestsBase
 
         nodeInfo1.Addresses.Add("address1");
         nodeInfo1.Addresses.Add("address2");
-        nodeInfo1.Attributes.Add(new NodeInfo.Types.Attribute { Key = "key1", Value = "value1"});
+        nodeInfo1.Attributes.Add(new NodeInfo.Types.Attribute { Key = "key1", Value = "value1" });
         nodeInfo1.Attributes.Add(new NodeInfo.Types.Attribute { Key = "key2", Value = "value2" });
 
         var nodeInfo2 = new NodeInfo
         {
             State = NodeInfo.Types.State.Offline,
-            PublicKey = ByteString.CopyFrom([3,4,5])
+            PublicKey = ByteString.CopyFrom([3, 4, 5])
         };
 
         nodeInfo2.Addresses.Add("address3");
@@ -244,7 +244,7 @@ public class NetworkTest : NetworkTestsBase
 
         body.NodeInfo.Addresses.Add("address1");
         body.NodeInfo.Addresses.Add("address2");
-        body.NodeInfo.Attributes.Add(new NodeInfo.Types.Attribute { Key = "key1", Value = "value1"});
+        body.NodeInfo.Attributes.Add(new NodeInfo.Types.Attribute { Key = "key1", Value = "value1" });
         body.NodeInfo.Attributes.Add(new NodeInfo.Types.Attribute { Key = "key2", Value = "value2" });
 
         Mocker.NodeInfoResponse = new LocalNodeInfoResponse { Body = body };

src/FrostFS.SDK.Tests/ObjectTest.cs

@@ -1,3 +1,6 @@
+using System.Security.Cryptography;
+using System.Text;
+
 using FrostFS.Refs;
 using FrostFS.SDK.ClientV2;
 using FrostFS.SDK.ClientV2.Interfaces;
@@ -9,9 +12,6 @@ using Google.Protobuf;
 
 using Microsoft.Extensions.Options;
 
-using System.Security.Cryptography;
-using System.Text;
-
 namespace FrostFS.SDK.Tests;
 
 public abstract class ObjectTestsBase
@@ -48,7 +48,7 @@ public abstract class ObjectTestsBase
         Mocker.ObjectHeader = new(
             ContainerId,
             FrostFsObjectType.Regular,
-            [new FrostFsAttribute("k", "v")],
+            [new FrostFsAttributePair("k", "v")],
             null,
             FrostFsOwner.FromKey(ecdsaKey),
             new FrostFsVersion(2, 13));
@@ -56,7 +56,7 @@ public abstract class ObjectTestsBase
 
     protected IFrostFSClient GetClient()
     {
-        return Client.GetTestInstance(
+        return FrostFSClient.GetTestInstance(
             Settings,
             null,
             NetworkMocker.GetMock().Object,
@@ -75,10 +75,12 @@ public class ObjectTest : ObjectTestsBase
 
         var ecdsaKey = key.LoadWif();
 
-        var ctx = new Context {
+        var ctx = new Context
-                Key = ecdsaKey, 
+        {
-                OwnerId = FrostFsOwner.FromKey(ecdsaKey), 
+            Key = ecdsaKey,
-                Version = new FrostFsVersion(2, 13) };
+            OwnerId = FrostFsOwner.FromKey(ecdsaKey),
+            Version = new FrostFsVersion(2, 13)
+        };
 
         var objectId = client.CalculateObjectId(Mocker.ObjectHeader!, ctx);
 
@@ -86,12 +88,12 @@ public class ObjectTest : ObjectTestsBase
 
         Assert.NotNull(result);
 
-        Assert.Equal(Mocker.ObjectHeader!.ContainerId.Value, result.Header.ContainerId.Value);
+        Assert.Equal(Mocker.ObjectHeader!.ContainerId.GetValue(), result.Header.ContainerId.GetValue());
         Assert.Equal(Mocker.ObjectHeader!.OwnerId!.Value, result.Header.OwnerId!.Value);
         Assert.Equal(Mocker.ObjectHeader.PayloadLength, result.Header.PayloadLength);
         Assert.Single(result.Header.Attributes);
         Assert.Equal(Mocker.ObjectHeader.Attributes[0].Key, result.Header.Attributes[0].Key);
-        Assert.Equal(Mocker.ObjectHeader.Attributes[0].Value,result.Header.Attributes[0].Value);
+        Assert.Equal(Mocker.ObjectHeader.Attributes[0].Value, result.Header.Attributes[0].Value);
     }
 
     [Fact]
@@ -251,7 +253,7 @@ public class ObjectTest : ObjectTestsBase
         Assert.Equal(Mocker.ObjectId.ToMessage(), request.Body.Address.ObjectId);
 
         Assert.NotNull(response);
-        Assert.Equal(ContainerId.Value, response.ContainerId.Value);
+        Assert.Equal(ContainerId.GetValue(), response.ContainerId.GetValue());
 
         Assert.Equal(Mocker.ObjectHeader!.OwnerId!.Value, response.OwnerId!.Value);
         Assert.Equal(Mocker.ObjectHeader!.Version!.ToString(), response.Version!.ToString());

src/FrostFS.SDK.Tests/SessionTests.cs

@@ -1,3 +1,5 @@
+using System.Security.Cryptography;
+
 using FrostFS.SDK.ClientV2;
 using FrostFS.SDK.ClientV2.Interfaces;
 using FrostFS.SDK.ClientV2.Mappers.GRPC;
@@ -6,8 +8,6 @@ using FrostFS.SDK.Cryptography;
 
 using Microsoft.Extensions.Options;
 
-using System.Security.Cryptography;
-
 namespace FrostFS.SDK.Tests;
 
 public abstract class SessionTestsBase
@@ -41,7 +41,7 @@ public abstract class SessionTestsBase
 
     protected IFrostFSClient GetClient()
     {
-        return ClientV2.Client.GetTestInstance(
+        return ClientV2.FrostFSClient.GetTestInstance(
             Settings,
             null,
             new NetworkMocker(this.key).GetMock().Object,

src/FrostFS.SDK.Tests/SmokeTests.cs

@@ -11,16 +11,16 @@ namespace FrostFS.SDK.SmokeTests;
 
 public class SmokeTests : SmokeTestsBase
 {
-    private static readonly PrmWait lightWait = new (100, 1);
+    private static readonly PrmWait lightWait = new(100, 1);
 
     [Theory]
     [InlineData(false)]
     [InlineData(true)]
     public async void NetworkMapTest(bool isSingleOnwerClient)
     {
-        using var client = isSingleOnwerClient ? Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url)) : Client.GetInstance(GetOptions(this.url));
+        using var client = isSingleOnwerClient ? FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url)) : FrostFSClient.GetInstance(GetOptions(this.url));
 
-        PrmNetmapSnapshot? prm = isSingleOnwerClient ? default : new () { Context = Ctx };
+        PrmNetmapSnapshot? prm = isSingleOnwerClient ? default : new() { Context = Ctx };
         var result = await client.GetNetmapSnapshotAsync(prm);
 
         Assert.True(result.Epoch > 0);
@@ -41,7 +41,7 @@ public class SmokeTests : SmokeTestsBase
     [InlineData(true)]
     public async void NodeInfoTest(bool isSingleOnwerClient)
     {
-        using var client = isSingleOnwerClient ? Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url)) : Client.GetInstance(GetOptions(this.url));
+        using var client = isSingleOnwerClient ? FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url)) : FrostFSClient.GetInstance(GetOptions(this.url));
 
         PrmNodeInfo? prm = isSingleOnwerClient ? default : new() { Context = Ctx };
 
@@ -63,7 +63,7 @@ public class SmokeTests : SmokeTestsBase
             Callback = (cs) => Console.WriteLine($"{cs.MethodName} took {cs.ElapsedMicroSeconds} microseconds")
         };
 
-        using var client = Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
+        using var client = FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
 
         var result = await client.GetNodeInfoAsync();
     }
@@ -73,7 +73,7 @@ public class SmokeTests : SmokeTestsBase
     [InlineData(true)]
     public async void GetSessionTest(bool isSingleOnwerClient)
     {
-        using var client = isSingleOnwerClient ? Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url)) : Client.GetInstance(GetOptions(this.url));
+        using var client = isSingleOnwerClient ? FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url)) : FrostFSClient.GetInstance(GetOptions(this.url));
 
         PrmSessionCreate? prm = isSingleOnwerClient ? new PrmSessionCreate(100) : new PrmSessionCreate(100) { Context = Ctx };
 
@@ -96,14 +96,14 @@ public class SmokeTests : SmokeTestsBase
     [Fact]
     public async void CreateObjectWithSessionToken()
     {
-        using var client = Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
+        using var client = FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
 
         await Cleanup(client);
 
         var token = await client.CreateSessionAsync(new PrmSessionCreate(int.MaxValue));
 
         var createContainerParam = new PrmContainerCreate(
-            new FrostFsContainerInfo(BasicAcl.PublicRW, new FrostFsPlacementPolicy(true, new FrostFsReplica(1))));
+            new FrostFsContainerInfo(new FrostFsPlacementPolicy(true, new FrostFsReplica(1))));
 
         createContainerParam.XHeaders.Add("key1", "value1");
 
@@ -116,39 +116,44 @@ public class SmokeTests : SmokeTestsBase
             Header = new FrostFsObjectHeader(
                 containerId: containerId,
                 type: FrostFsObjectType.Regular,
-                [new FrostFsAttribute("fileName", "test")]),
+                [new FrostFsAttributePair("fileName", "test")]),
             Payload = new MemoryStream(bytes),
             ClientCut = false,
             SessionToken = token
         };
 
-        var objectId = await client.PutObjectAsync(param);
+        var objectId = await client.PutObjectAsync(param).ConfigureAwait(true);
 
-        var @object = await client.GetObjectAsync(new PrmObjectGet(containerId, objectId));
+        var @object = await client.GetObjectAsync(new PrmObjectGet(containerId, objectId))
+            .ConfigureAwait(true);
 
         var downloadedBytes = new byte[@object.Header.PayloadLength];
         MemoryStream ms = new(downloadedBytes);
 
         ReadOnlyMemory<byte>? chunk = null;
-        while ((chunk = await @object.ObjectReader!.ReadChunk()) != null)
+        while ((chunk = await @object.ObjectReader!.ReadChunk().ConfigureAwait(true)) != null)
         {
             ms.Write(chunk.Value.Span);
         }
 
-        Assert.Equal(MD5.HashData(bytes), MD5.HashData(downloadedBytes));
+        Assert.Equal(SHA256.HashData(bytes), SHA256.HashData(downloadedBytes));
 
-        await Cleanup(client);
+        await Cleanup(client).ConfigureAwait(true);
     }
 
     [Fact]
     public async void FilterTest()
     {
-        using var client = Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
+        using var client = FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
+
+        //var prm = new PrmApeChainList(new FrostFsChainTarget(FrostFsTargetType.Namespace, "root"));
+
+        //var chains = await client.ListChainAsync(prm);
 
         await Cleanup(client);
 
         var createContainerParam = new PrmContainerCreate(
-           new FrostFsContainerInfo(BasicAcl.PublicRW, new FrostFsPlacementPolicy(true, new FrostFsReplica(1))))
+           new FrostFsContainerInfo(new FrostFsPlacementPolicy(true, new FrostFsReplica(1))))
         {
             WaitParams = lightWait
         };
@@ -169,7 +174,7 @@ public class SmokeTests : SmokeTestsBase
             Header = new FrostFsObjectHeader(
                 containerId: containerId,
                 type: FrostFsObjectType.Regular,
-                [new FrostFsAttribute("fileName", "test")],
+                [new FrostFsAttributePair("fileName", "test")],
                 new FrostFsSplit()),
             Payload = new MemoryStream(bytes),
             ClientCut = false
@@ -189,7 +194,7 @@ public class SmokeTests : SmokeTestsBase
 
         await CheckFilter(client, containerId, new FilterBySplitId(FrostFsMatchType.Equals, param.Header.Split.SplitId));
 
-        await CheckFilter(client, containerId, new FilterByAttribute(FrostFsMatchType.Equals, "fileName", "test"));
+        await CheckFilter(client, containerId, new FilterByAttributePair(FrostFsMatchType.Equals, "fileName", "test"));
 
         await CheckFilter(client, containerId, new FilterByObjectId(FrostFsMatchType.Equals, objectId));
 
@@ -227,14 +232,14 @@ public class SmokeTests : SmokeTestsBase
     [InlineData(6 * 1024 * 1024 + 100)]
     public async void SimpleScenarioTest(int objectSize)
     {
-        using var client = Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
+        using var client = FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
 
         await Cleanup(client);
 
         bool callbackInvoked = false;
         var ctx = new Context
         {
-           // Timeout = TimeSpan.FromSeconds(20),
+            // Timeout = TimeSpan.FromSeconds(20),
             Callback = new((CallStatistics cs) =>
             {
                 callbackInvoked = true;
@@ -243,7 +248,7 @@ public class SmokeTests : SmokeTestsBase
         };
 
         var createContainerParam = new PrmContainerCreate(
-            new FrostFsContainerInfo(BasicAcl.PublicRW, new FrostFsPlacementPolicy(true, new FrostFsReplica(1)),[new ("testKey", "testValue")]))
+            new FrostFsContainerInfo(new FrostFsPlacementPolicy(true, new FrostFsReplica(1)), [new("testKey", "testValue")]))
         {
             Context = ctx
         };
@@ -261,7 +266,7 @@ public class SmokeTests : SmokeTestsBase
             Header = new FrostFsObjectHeader(
                 containerId: createdContainer,
                 type: FrostFsObjectType.Regular,
-                [new FrostFsAttribute("fileName", "test")]),
+                [new FrostFsAttributePair("fileName", "test")]),
             Payload = new MemoryStream(bytes),
             ClientCut = false,
             Context = new Context
@@ -272,7 +277,7 @@ public class SmokeTests : SmokeTestsBase
 
         var objectId = await client.PutObjectAsync(param);
 
-        var filter = new FilterByAttribute(FrostFsMatchType.Equals, "fileName", "test");
+        var filter = new FilterByAttributePair(FrostFsMatchType.Equals, "fileName", "test");
 
         bool hasObject = false;
         await foreach (var objId in client.SearchObjectsAsync(new PrmObjectSearch(createdContainer) { Filters = [filter] }))
@@ -315,7 +320,7 @@ public class SmokeTests : SmokeTestsBase
     [InlineData(6 * 1024 * 1024 + 100)]
     public async void SimpleScenarioWithSessionTest(int objectSize)
     {
-        using var client = Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
+        using var client = FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
 
         var token = await client.CreateSessionAsync(new PrmSessionCreate(int.MaxValue));
 
@@ -328,7 +333,7 @@ public class SmokeTests : SmokeTestsBase
         };
 
         var createContainerParam = new PrmContainerCreate(
-            new FrostFsContainerInfo(BasicAcl.PublicRW, new FrostFsPlacementPolicy(true, new FrostFsReplica(1))))
+            new FrostFsContainerInfo(new FrostFsPlacementPolicy(true, new FrostFsReplica(1))))
         {
             Context = ctx
         };
@@ -345,7 +350,7 @@ public class SmokeTests : SmokeTestsBase
             Header = new FrostFsObjectHeader(
                 containerId: container,
                 type: FrostFsObjectType.Regular,
-                [new FrostFsAttribute("fileName", "test")]),
+                [new FrostFsAttributePair("fileName", "test")]),
             Payload = new MemoryStream(bytes),
             ClientCut = false,
             Context = new Context
@@ -357,7 +362,7 @@ public class SmokeTests : SmokeTestsBase
 
         var objectId = await client.PutObjectAsync(param);
 
-        var filter = new FilterByAttribute(FrostFsMatchType.Equals, "fileName", "test");
+        var filter = new FilterByAttributePair(FrostFsMatchType.Equals, "fileName", "test");
 
         bool hasObject = false;
         await foreach (var objId in client.SearchObjectsAsync(new PrmObjectSearch(container) { Filters = [filter], SessionToken = token }))
@@ -403,11 +408,11 @@ public class SmokeTests : SmokeTestsBase
     [InlineData(200)]
     public async void ClientCutScenarioTest(int objectSize)
     {
-        using var client = Client.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
+        using var client = FrostFSClient.GetSingleOwnerInstance(GetSingleOwnerOptions(this.key, this.url));
 
         await Cleanup(client);
 
-        var createContainerParam = new PrmContainerCreate(new FrostFsContainerInfo(BasicAcl.PublicRW, new FrostFsPlacementPolicy(true, new FrostFsReplica(1))))
+        var createContainerParam = new PrmContainerCreate(new FrostFsContainerInfo(new FrostFsPlacementPolicy(true, new FrostFsReplica(1))))
         {
             WaitParams = lightWait
         };
@@ -431,14 +436,14 @@ public class SmokeTests : SmokeTestsBase
             Header = new FrostFsObjectHeader(
                 containerId: containerId,
                 type: FrostFsObjectType.Regular,
-                [new FrostFsAttribute("fileName", "test")]),
+                [new FrostFsAttributePair("fileName", "test")]),
             Payload = new MemoryStream(bytes),
             ClientCut = true
         };
 
         var objectId = await client.PutObjectAsync(param);
 
-        var filter = new FilterByAttribute(FrostFsMatchType.Equals, "fileName", "test");
+        var filter = new FilterByAttributePair(FrostFsMatchType.Equals, "fileName", "test");
 
         bool hasObject = false;
         await foreach (var objId in client.SearchObjectsAsync(new PrmObjectSearch(containerId, filter)))
@@ -476,14 +481,14 @@ public class SmokeTests : SmokeTestsBase
         IAsyncEnumerator<FrostFsContainerId>? enumerator = null;
         do
         {
-           if (deadline <= DateTime.UtcNow)
+            if (deadline <= DateTime.UtcNow)
-           { 
+            {
-               Assert.Fail("Containers exist");
+                Assert.Fail("Containers exist");
-               break;
+                break;
-           }
+            }
 
-           enumerator = client.ListContainersAsync().GetAsyncEnumerator();
+            enumerator = client.ListContainersAsync().GetAsyncEnumerator();
-           await Task.Delay(500);        
+            await Task.Delay(500);
         }
         while (await enumerator!.MoveNextAsync());
     }

src/FrostFS.SDK.Tests/SmokeTestsBase.cs

@@ -8,6 +8,7 @@ namespace FrostFS.SDK.SmokeTests;
 public abstract class SmokeTestsBase
 {
     protected readonly string key = "KzPXA6669m2pf18XmUdoR8MnP1pi1PMmefiFujStVFnv7WR5SRmK";
+    
     protected readonly string url = "http://172.23.32.4:8080";
 
     protected ECDsa Key { get; }