[#28] Clients: Make immutable parameters

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

src/FrostFS.SDK.Client/Parameters/PrmApeChainAdd.cs

@@ -0,0 +1,43 @@
+namespace FrostFS.SDK.Client;
+
+public readonly struct PrmApeChainAdd(FrostFsChainTarget target, FrostFsChain chain, string[]? xheaders = null) : System.IEquatable<PrmApeChainAdd>
+{
+    public FrostFsChainTarget Target { get; } = target;
+
+    public FrostFsChain Chain { get; } = chain;
+
+    /// <summary>
+    /// FrostFS request X-Headers
+    /// </summary>
+    public string[] XHeaders { get; } = xheaders ?? [];
+
+    public override readonly bool Equals(object obj)
+    {
+        if (obj == null || obj is not PrmApeChainAdd)
+            return false;
+
+        return Equals((PrmApeChainAdd)obj);
+    }
+
+    public readonly bool Equals(PrmApeChainAdd other)
+    {
+        return Target == other.Target
+            && Chain == other.Chain
+            && XHeaders == other.XHeaders;
+    }
+
+    public override readonly int GetHashCode()
+    {
+        return Chain.GetHashCode() ^ Target.GetHashCode() ^ XHeaders.GetHashCode();
+    }
+
+    public static bool operator ==(PrmApeChainAdd left, PrmApeChainAdd right)
+    {
+        return left.Equals(right);
+    }
+
+    public static bool operator !=(PrmApeChainAdd left, PrmApeChainAdd right)
+    {
+        return !(left == right);
+    }
+}