From 92213098313f20e08280e32af4679e2779f3c6c3 Mon Sep 17 00:00:00 2001
From: hzrd149 <github@hzrd149.com>
Date: Thu, 2 Mar 2023 19:46:23 -0600
Subject: [PATCH] add im memory cache for dns ids

---
 package.json                 |  2 +-
 src/services/dns-identity.ts | 21 ++++++++++++++++++---
 yarn.lock                    |  8 ++++----
 3 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/package.json b/package.json
index c124a0194..5471823e7 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "light-bolt11-decoder": "^2.1.0",
     "moment": "^2.29.4",
     "noble-secp256k1": "^1.2.14",
-    "nostr-tools": "^1.5.0",
+    "nostr-tools": "^1.7.4",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-error-boundary": "^3.1.4",
diff --git a/src/services/dns-identity.ts b/src/services/dns-identity.ts
index 69e27ca68..db63e167b 100644
--- a/src/services/dns-identity.ts
+++ b/src/services/dns-identity.ts
@@ -59,21 +59,36 @@ async function fetchIdentity(address: string) {
   return getIdentityFromJson(name, domain, json);
 }
 
+const inMemoryCache = new Map<string, DnsIdentity>();
+
 async function addToCache(domain: string, json: IdentityJson) {
   const now = moment().unix();
   const transaction = db.transaction("dnsIdentifiers", "readwrite");
 
   for (const name of Object.keys(json.names)) {
     const identity = getIdentityFromJson(name, domain, json);
-    if (identity && transaction.store.put) {
-      await transaction.store.put({ ...identity, updated: now }, `${name}@${domain}`);
+    if (identity) {
+      const id = `${name}@${domain}`;
+
+      // add to memory cache
+      inMemoryCache.set(id, identity);
+
+      // ad to db cache
+      if (transaction.store.put) {
+        await transaction.store.put({ ...identity, updated: now }, id);
+      }
     }
   }
   await transaction.done;
 }
 
 async function getIdentity(address: string, alwaysFetch = false) {
-  const cached = await db.get("dnsIdentifiers", address);
+  if (!inMemoryCache.has(address)) {
+    const fromDb = await db.get("dnsIdentifiers", address);
+    if (fromDb) inMemoryCache.set(address, fromDb);
+  }
+
+  const cached = inMemoryCache.get(address);
   if (cached && !alwaysFetch) return cached;
 
   return fetchIdentity(address);
diff --git a/yarn.lock b/yarn.lock
index f70580002..a16232217 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3483,10 +3483,10 @@ node-releases@^2.0.6:
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-2.0.8.tgz#0f349cdc8fcfa39a92ac0be9bc48b7706292b9ae"
   integrity sha512-dFSmB8fFHEH/s81Xi+Y/15DQY6VHW81nXRj86EMSL3lmuTmK1e+aT4wrFCkTbm+gSwkw4KpX+rT/pMM2c1mF+A==
 
-nostr-tools@^1.5.0:
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/nostr-tools/-/nostr-tools-1.5.0.tgz#b8b8d4d9e122c4acbdfe8b580e82f539f0866b42"
-  integrity sha512-9zZdS3OF1hC8Tzpx2ycFLFx0AYSXBkLZ5EaXcPWIdZlQgSkpDrHl/TUYk2E8K7OocK+3VNbo4+7K2N38qdCjsg==
+nostr-tools@^1.7.4:
+  version "1.7.4"
+  resolved "https://registry.yarnpkg.com/nostr-tools/-/nostr-tools-1.7.4.tgz#8f14ffde8f6674c3758bb49207a1ee4227a4b9fe"
+  integrity sha512-YowDJ+S3UW9KCYPDZfZXXMITrJSMjiCmFOK5HohyKkg+w6EipFUTkFRBPRA2BTLXO/qw8gukKXfL0B7Dv3jtcQ==
   dependencies:
     "@noble/hashes" "1.0.0"
     "@noble/secp256k1" "^1.7.1"