1 files changed, 15 insertions, 0 deletions
diff --git a/src/lib/nip11.ts b/src/lib/nip11.ts
new file mode 100644
index 00000000..af254b7e
--- /dev/null
+++ b/src/lib/nip11.ts
@@ -0,0 +1,15 @@
+import { fetchRelayInformation } from 'nostr-tools/nip11';
+
+// Accepts a list of relays, and returns a list of the relays that support all the provided NIPs.
+export const relaysSupporting = async (relays: string[], nips: number[]) => {
+    let supportingRelays = [];
+
+    for (const relay of relays) {
+        const relayInfo = await fetchRelayInformation(relay);
+        if (nips.every(relay => relayInfo.supported_nips.includes(relay))) {
+            supportingRelays.push(relay);
+        }
+    }
+
+    return supportingRelays;
+}