app/controllers/well_known_controller.rb

@@ -5,11 +5,19 @@ class WellKnownController < ApplicationController
     @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 }
+    }
+
+    if Setting.nostr_relay_url
+      res[:relays] = {
+        @user.nostr_pubkey => [ Setting.nostr_relay_url ]
+      }
+    end
+
     respond_to do |format|
       format.json do
-        render json: {
-          names: { "#{@user.cn}": @user.nostr_pubkey }
-        }.to_json
+        render json: res.to_json
       end
     end
   end

spec/requests/well_known_spec.rb

@@ -45,6 +45,27 @@ RSpec.describe "Well-known URLs", type: :request do
         expect(res["names"].keys.size).to eq(1)
         expect(res["names"]["bobdylan"]).to eq(user.nostr_pubkey)
       end
+
+      context "without relay configured" do
+        it "does not include a recommended relay" do
+          get "/.well-known/nostr.json?name=bobdylan"
+          res = JSON.parse(response.body)
+          expect(res["relays"]).to be_nil
+        end
+      end
+
+      context "with relay configured" do
+        before do
+          Setting.nostr_relay_url = "wss://nostr.kosmos.org"
+        end
+
+        it "includes a recommended relay" do
+          get "/.well-known/nostr.json?name=bobdylan"
+          res = JSON.parse(response.body)
+          expect(res["relays"][user.nostr_pubkey].length).to eq(1)
+          expect(res["relays"][user.nostr_pubkey].first).to eq("wss://nostr.kosmos.org")
+        end
+      end
     end
   end
 end