diff --git a/LibMatrix/Responses/Federation/ServerKeysResponse.cs b/LibMatrix/Responses/Federation/ServerKeysResponse.cs
new file mode 100644
index 0000000..cb62e34
--- /dev/null
+++ b/LibMatrix/Responses/Federation/ServerKeysResponse.cs
@@ -0,0 +1,55 @@
+using System.Diagnostics;
+using System.Text.Json.Serialization;
+using LibMatrix.Abstractions;
+
+namespace LibMatrix.Responses.Federation;
+
+public class ServerKeysResponse {
+ [JsonPropertyName("server_name")]
+ public string ServerName { get; set; }
+
+ [JsonPropertyName("valid_until_ts")]
+ public ulong ValidUntilTs { get; set; }
+
+ [JsonIgnore]
+ public DateTime ValidUntil {
+ get => DateTimeOffset.FromUnixTimeMilliseconds((long)ValidUntilTs).DateTime;
+ set => ValidUntilTs = (ulong)new DateTimeOffset(value).ToUnixTimeMilliseconds();
+ }
+
+ [JsonPropertyName("verify_keys")]
+ public Dictionary<string, CurrentVerifyKey> VerifyKeys { get; set; } = new();
+
+ [JsonIgnore]
+ public Dictionary<VersionedKeyId, CurrentVerifyKey> VerifyKeysById {
+ get => VerifyKeys.ToDictionary(key => (VersionedKeyId)key.Key, key => key.Value);
+ set => VerifyKeys = value.ToDictionary(key => (string)key.Key, key => key.Value);
+ }
+
+ [JsonPropertyName("old_verify_keys")]
+ public Dictionary<string, ExpiredVerifyKey> OldVerifyKeys { get; set; } = new();
+
+ [JsonIgnore]
+ public Dictionary<VersionedKeyId, ExpiredVerifyKey> OldVerifyKeysById {
+ get => OldVerifyKeys.ToDictionary(key => (VersionedKeyId)key.Key, key => key.Value);
+ set => OldVerifyKeys = value.ToDictionary(key => (string)key.Key, key => key.Value);
+ }
+
+ [DebuggerDisplay("{Key}")]
+ public class CurrentVerifyKey {
+ [JsonPropertyName("key")]
+ public string Key { get; set; }
+ }
+
+ [DebuggerDisplay("{Key} (expired {Expired})")]
+ public class ExpiredVerifyKey : CurrentVerifyKey {
+ [JsonPropertyName("expired_ts")]
+ public ulong ExpiredTs { get; set; }
+
+ [JsonIgnore]
+ public DateTime Expired {
+ get => DateTimeOffset.FromUnixTimeMilliseconds((long)ExpiredTs).DateTime;
+ set => ExpiredTs = (ulong)new DateTimeOffset(value).ToUnixTimeMilliseconds();
+ }
+ }
+}
diff --git a/LibMatrix/Responses/Federation/ServerVersionResponse.cs b/LibMatrix/Responses/Federation/ServerVersionResponse.cs
new file mode 100644
index 0000000..b09bdd0
--- /dev/null
+++ b/LibMatrix/Responses/Federation/ServerVersionResponse.cs
@@ -0,0 +1,16 @@
+using System.Text.Json.Serialization;
+
+namespace LibMatrix.Responses.Federation;
+
+public class ServerVersionResponse {
+ [JsonPropertyName("server")]
+ public required ServerInfo Server { get; set; }
+
+ public class ServerInfo {
+ [JsonPropertyName("name")]
+ public string Name { get; set; }
+
+ [JsonPropertyName("version")]
+ public string Version { get; set; }
+ }
+}
\ No newline at end of file
diff --git a/LibMatrix/Responses/Federation/SignedObject.cs b/LibMatrix/Responses/Federation/SignedObject.cs
new file mode 100644
index 0000000..3f6ffd6
--- /dev/null
+++ b/LibMatrix/Responses/Federation/SignedObject.cs
@@ -0,0 +1,68 @@
+using System.Text.Json;
+using System.Text.Json.Nodes;
+using System.Text.Json.Serialization;
+using ArcaneLibs.Extensions;
+using LibMatrix.Abstractions;
+using LibMatrix.Homeservers;
+
+namespace LibMatrix.Responses.Federation;
+
+[JsonConverter(typeof(SignedObjectConverterFactory))]
+public class SignedObject<T> {
+ [JsonPropertyName("signatures")]
+ public Dictionary<string, Dictionary<string, string>> Signatures { get; set; } = new();
+
+ [JsonIgnore]
+ public Dictionary<string, Dictionary<VersionedKeyId, string>> SignaturesById {
+ get => Signatures.ToDictionary(server => server.Key, server => server.Value.ToDictionary(key => (VersionedKeyId)key.Key, key => key.Value));
+ set => Signatures = value.ToDictionary(server => server.Key, server => server.Value.ToDictionary(key => (string)key.Key, key => key.Value));
+ }
+
+ [JsonExtensionData]
+ public required JsonObject Content { get; set; }
+
+ [JsonIgnore]
+ public T TypedContent {
+ get => Content.Deserialize<T>() ?? throw new JsonException("Failed to deserialize TypedContent from Content.");
+ set => Content = JsonSerializer.Deserialize<JsonObject>(JsonSerializer.Serialize(value)) ?? new JsonObject();
+ }
+}
+
+public class SignedObjectConverter<T> : JsonConverter<SignedObject<T>> {
+ public override SignedObject<T> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) {
+ var jsonObject = JsonSerializer.Deserialize<JsonObject>(ref reader, options);
+ if (jsonObject == null) {
+ throw new JsonException("Failed to deserialize SignedObject, JSON object is null.");
+ }
+
+ var signatures = jsonObject["signatures"] ?? throw new JsonException("Failed to find 'signatures' property in JSON object.");
+ jsonObject.Remove("signatures");
+
+ var signedObject = new SignedObject<T> {
+ Content = jsonObject,
+ Signatures = signatures.Deserialize<Dictionary<string, Dictionary<string, string>>>()
+ ?? throw new JsonException("Failed to deserialize 'signatures' property into Dictionary<string, Dictionary<string, string>>.")
+ };
+
+ return signedObject;
+ }
+
+ public override void Write(Utf8JsonWriter writer, SignedObject<T> value, JsonSerializerOptions options) {
+ var targetObj = value.Content.DeepClone();
+ targetObj["signatures"] = value.Signatures.ToJsonNode();
+ JsonSerializer.Serialize(writer, targetObj, options);
+ }
+}
+
+internal class SignedObjectConverterFactory : JsonConverterFactory {
+ public override bool CanConvert(Type typeToConvert) {
+ if (!typeToConvert.IsGenericType) return false;
+ return typeToConvert.GetGenericTypeDefinition() == typeof(SignedObject<>);
+ }
+
+ public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options) {
+ var wrappedType = typeToConvert.GetGenericArguments()[0];
+ var converter = (JsonConverter)Activator.CreateInstance(typeof(SignedObjectConverter<>).MakeGenericType(wrappedType))!;
+ return converter;
+ }
+}
\ No newline at end of file
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