app/controllers/well_known_controller.rb

@@ -9,15 +9,13 @@ class WellKnownController < ApplicationController
     if params[:name] == "_"
       # pubkey for the primary domain without a username (e.g. kosmos.org)
       res = { names: { "_": Setting.nostr_public_key } }
+      res[:relays] = { "_" => [ relay_url ] } if relay_url
     else
       @user = User.where(cn: params[:name], ou: domain).first
       http_status :not_found and return if @user.nil? || @user.nostr_pubkey.blank?
 
       res = { names: { @user.cn => @user.nostr_pubkey } }
-    end
-
-    if relay_url
-      res[:relays] = { @user.nostr_pubkey => [ relay_url ] }
+      res[:relays] = { @user.nostr_pubkey => [ relay_url ] } if relay_url
     end
 
     respond_to do |format|

spec/requests/well_known_spec.rb

@@ -75,6 +75,19 @@ RSpec.describe "Well-known URLs", type: :request do
         expect(res["names"]["_"]).to eq(Setting.nostr_public_key)
       end
 
+      context "with relay configured" do
+        before do
+          Setting.nostr_relay_url = "wss://nostr.kosmos.org"
+        end
+
+        it "returns the pubkey and relay" do
+          get "/.well-known/nostr.json?name=_"
+          res = JSON.parse(response.body)
+          expect(res["relays"]["_"].length).to eq(1)
+          expect(res["relays"]["_"].first).to eq("wss://nostr.kosmos.org")
+        end
+      end
+
       context "nostr service integration not enabled" do
         before do
           Setting.nostr_enabled = false