From 4765f0cfd95f6160f32c75481651d125f343cd58 Mon Sep 17 00:00:00 2001
From: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
Date: Fri, 30 Aug 2019 15:22:51 +0100
Subject: [PATCH] Add m.id_access_token flag (#5930)

Adds a flag to `/versions`' `unstable_features` section indicating that this Synapse understands what an `id_access_token` is, as per https://github.com/matrix-org/synapse/issues/5927#issuecomment-523566043

Fixes #5927
---
 changelog.d/5930.misc           | 1 +
 synapse/rest/client/versions.py | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)
 create mode 100644 changelog.d/5930.misc

diff --git a/changelog.d/5930.misc b/changelog.d/5930.misc
new file mode 100644
index 0000000000..81dcc10e6d
--- /dev/null
+++ b/changelog.d/5930.misc
@@ -0,0 +1 @@
+Add temporary flag to /versions in unstable_features to indicate this Synapse supports receiving id_access_token parameters on calls to identity server-proxying endpoints.
\ No newline at end of file
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index 0e09191632..c51c9e617d 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -44,7 +44,12 @@ class VersionsRestServlet(RestServlet):
                     "r0.5.0",
                 ],
                 # as per MSC1497:
-                "unstable_features": {"m.lazy_load_members": True},
+                "unstable_features": {
+                    "m.lazy_load_members": True,
+                    # as per https://github.com/matrix-org/synapse/issues/5927
+                    # to be removed in r0.6.0
+                    "m.id_access_token": True,
+                },
             },
         )
 
-- 
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