diff --git a/MxApiExtensions.Classes.LibMatrix/MxApiExtensions.Classes.LibMatrix.csproj b/MxApiExtensions.Classes.LibMatrix/MxApiExtensions.Classes.LibMatrix.csproj
new file mode 100644
index 0000000..db9f354
--- /dev/null
+++ b/MxApiExtensions.Classes.LibMatrix/MxApiExtensions.Classes.LibMatrix.csproj
@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+ <PropertyGroup>
+ <TargetFramework>net7.0</TargetFramework>
+ <ImplicitUsings>enable</ImplicitUsings>
+ <Nullable>enable</Nullable>
+ </PropertyGroup>
+
+ <ItemGroup>
+ <ProjectReference Include="..\..\LibMatrix\LibMatrix\LibMatrix.csproj" />
+ <ProjectReference Include="..\MxApiExtensions.Classes\MxApiExtensions.Classes.csproj" />
+ </ItemGroup>
+
+</Project>
diff --git a/MxApiExtensions.Classes.LibMatrix/MxApiMatrixException.cs b/MxApiExtensions.Classes.LibMatrix/MxApiMatrixException.cs
new file mode 100644
index 0000000..e5f434a
--- /dev/null
+++ b/MxApiExtensions.Classes.LibMatrix/MxApiMatrixException.cs
@@ -0,0 +1,48 @@
+using ArcaneLibs.Extensions;
+using LibMatrix;
+
+namespace MxApiExtensions;
+
+public class MxApiMatrixException : MatrixException {
+ public string? GetAsJson() => new { ErrorCode, Error, SoftLogout, RetryAfterMs }.ToJson(ignoreNull: true);
+ public override string Message =>
+ base.Message.StartsWith("Unknown error: ")
+ ? $"{ErrorCode}: {ErrorCode switch {
+ // common
+ "M_FORBIDDEN" => $"You do not have permission to perform this action: {Error}",
+ "M_UNKNOWN_TOKEN" => $"The access token specified was not recognised: {Error}{(SoftLogout == true ? " (soft logout)" : "")}",
+ "M_MISSING_TOKEN" => $"No access token was specified: {Error}",
+ "M_BAD_JSON" => $"Request contained valid JSON, but it was malformed in some way: {Error}",
+ "M_NOT_JSON" => $"Request did not contain valid JSON: {Error}",
+ "M_NOT_FOUND" => $"The requested resource was not found: {Error}",
+ "M_LIMIT_EXCEEDED" => $"Too many requests have been sent in a short period of time. Wait a while then try again: {Error}",
+ "M_UNRECOGNISED" => $"The server did not recognise the request: {Error}",
+ "M_UNKOWN" => $"The server encountered an unexpected error: {Error}",
+ // endpoint specific
+ "M_UNAUTHORIZED" => $"The request did not contain valid authentication information for the target of the request: {Error}",
+ "M_USER_DEACTIVATED" => $"The user ID associated with the request has been deactivated: {Error}",
+ "M_USER_IN_USE" => $"The user ID associated with the request is already in use: {Error}",
+ "M_INVALID_USERNAME" => $"The requested user ID is not valid: {Error}",
+ "M_ROOM_IN_USE" => $"The room alias requested is already taken: {Error}",
+ "M_INVALID_ROOM_STATE" => $"The room associated with the request is not in a valid state to perform the request: {Error}",
+ "M_THREEPID_IN_USE" => $"The threepid requested is already associated with a user ID on this server: {Error}",
+ "M_THREEPID_NOT_FOUND" => $"The threepid requested is not associated with any user ID: {Error}",
+ "M_THREEPID_AUTH_FAILED" => $"The provided threepid and/or token was invalid: {Error}",
+ "M_THREEPID_DENIED" => $"The homeserver does not permit the third party identifier in question: {Error}",
+ "M_SERVER_NOT_TRUSTED" => $"The homeserver does not trust the identity server: {Error}",
+ "M_UNSUPPORTED_ROOM_VERSION" => $"The room version is not supported: {Error}",
+ "M_INCOMPATIBLE_ROOM_VERSION" => $"The room version is incompatible: {Error}",
+ "M_BAD_STATE" => $"The request was invalid because the state was invalid: {Error}",
+ "M_GUEST_ACCESS_FORBIDDEN" => $"Guest access is forbidden: {Error}",
+ "M_CAPTCHA_NEEDED" => $"Captcha needed: {Error}",
+ "M_CAPTCHA_INVALID" => $"Captcha invalid: {Error}",
+ "M_MISSING_PARAM" => $"Missing parameter: {Error}",
+ "M_INVALID_PARAM" => $"Invalid parameter: {Error}",
+ "M_TOO_LARGE" => $"The request or entity was too large: {Error}",
+ "M_EXCLUSIVE" => $"The resource being requested is reserved by an application service, or the application service making the request has not created the resource: {Error}",
+ "M_RESOURCE_LIMIT_EXCEEDED" => $"Exceeded resource limit: {Error}",
+ "M_CANNOT_LEAVE_SERVER_NOTICE_ROOM" => $"Cannot leave server notice room: {Error}",
+ _ => $"Unknown error: {new { ErrorCode, Error, SoftLogout, RetryAfterMs }.ToJson(ignoreNull: true)}"
+ }}"
+ : base.Message;
+}
diff --git a/MxApiExtensions.Classes.LibMatrix/RoomInfoEntry.cs b/MxApiExtensions.Classes.LibMatrix/RoomInfoEntry.cs
new file mode 100644
index 0000000..6ea188e
--- /dev/null
+++ b/MxApiExtensions.Classes.LibMatrix/RoomInfoEntry.cs
@@ -0,0 +1,20 @@
+using System.Text.Json.Serialization;
+using LibMatrix.Responses;
+
+namespace LibMatrix.MxApiExtensions;
+
+/// <summary>
+/// Generic room info, this will most likely be out of date due to caching!
+/// This is only useful for giving a rough idea of the room state.
+/// </summary>
+public class RoomInfoEntry {
+ public string RoomId { get; set; }
+ public List<StateEventResponse?> RoomState { get; set; }
+
+ public int StateCount { get; set; }
+
+ public Dictionary<string, int> MemberCounts { get; set; } = new();
+
+ // [JsonIgnore]
+ public DateTime ExpiresAt { get; set; } = DateTime.Now.AddMinutes(1);
+}
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