relay.info.nips config param: lets you override the supported NIPs list in NIP-11 responses and elsewhere

- requested by @ismyhc

src/apps/relay/RelayWebsocket.cpp

@@ -48,12 +48,23 @@ void RelayServer::runWebsocket(ThreadPool<MsgWebsocket>::Thread &thr) {
     tempBuf.reserve(cfg().events__maxEventSize + MAX_SUBID_SIZE + 100);
 
 
-    tao::json::value supportedNips = tao::json::value::array({ 1, 2, 4, 9, 11, 22, 28, 40, 70, 77 });
+    auto supportedNips = []{
+        tao::json::value output = tao::json::value::array({ 1, 2, 4, 9, 11, 22, 28, 40, 70, 77 });
+        if (cfg().relay__info__nips.size() == 0) return output;
+
+        try {
+            output = tao::json::from_string(cfg().relay__info__nips);
+        } catch (std::exception &e) {
+            LE << "Unable to parse config param relay.info.nips: " << e.what();
+        }
+
+        return output;
+    };
 
     auto getServerInfoHttpResponse = [&supportedNips, ver = uint64_t(0), rendered = std::string("")]() mutable {
         if (ver != cfg().version()) {
             tao::json::value nip11 = tao::json::value({
-                { "supported_nips", supportedNips },
+                { "supported_nips", supportedNips() },
                 { "software", "git+https://github.com/hoytech/strfry.git" },
                 { "version", APP_GIT_VERSION },
                 { "negentropy", negentropy::PROTOCOL_VERSION - 0x60 },
@@ -83,7 +94,7 @@ void RelayServer::runWebsocket(ThreadPool<MsgWebsocket>::Thread &thr) {
                 std::string supportedNips;
                 std::string version;
                 uint64_t negentropy;
-            } ctx = { tao::json::to_string(supportedNips), APP_GIT_VERSION, negentropy::PROTOCOL_VERSION - 0x60 };
+            } ctx = { tao::json::to_string(supportedNips()), APP_GIT_VERSION, negentropy::PROTOCOL_VERSION - 0x60 };
 
             rendered = preGenerateHttpResponse("text/html", ::strfrytmpl::landing(ctx).str);
             ver = cfg().version();

src/apps/relay/golpe.yaml

@@ -30,6 +30,9 @@ config:
   - name: relay__info__icon
     desc: "NIP-11: URL pointing to an image to be used as an icon for the relay"
     default: ""
+  - name: relay__info__nips
+    desc: "List of supported lists as JSON array, or empty string to use default. Example: [1,2]"
+    default: ""
 
   - name: relay__maxWebsocketPayloadSize
     desc: "Maximum accepted incoming websocket frame size (should be larger than max event)"

strfry.conf

@@ -67,6 +67,9 @@ relay {
 
         # NIP-11: URL pointing to an image to be used as an icon for the relay
         icon = ""
+
+        # List of supported lists as JSON array, or empty string to use default. Example: [1,2]
+        nips = ""
     }
 
     # Maximum accepted incoming websocket frame size (should be larger than max event) (restart required)