From 9b517179dc9054dfd1d41d189aa353082a412748 Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Wed, 14 Aug 2024 14:15:56 +0300
Subject: [PATCH] federation: fix signing requests with no body

---
 federation/client.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/federation/client.go b/federation/client.go
index dc8c139c..d49ba560 100644
--- a/federation/client.go
+++ b/federation/client.go
@@ -332,12 +332,16 @@ func (c *Client) compileRequest(ctx context.Context, params RequestParams) (*htt
 				Message: "client not configured for authentication",
 			}
 		}
+		var contentAny any
+		if reqJSON != nil {
+			contentAny = reqJSON
+		}
 		auth, err := (&signableRequest{
 			Method:      req.Method,
 			URI:         reqURL.RequestURI(),
 			Origin:      c.ServerName,
 			Destination: params.ServerName,
-			Content:     reqJSON,
+			Content:     contentAny,
 		}).Sign(c.Key)
 		if err != nil {
 			return nil, mautrix.HTTPError{