excessive vault request squelching

package.json

@@ -11,6 +11,7 @@
   "author": "",
   "license": "unlicensed",
   "dependencies": {
+    "@isaacs/ttlcache": "^1.4.1",
     "@maxmind/geoip2-node": "^5.0.0",
     "@socket.io/redis-adapter": "^8.2.1",
     "dotenv": "^16.3.1",

vault.js

@@ -5,6 +5,7 @@ import {sendVaultOrders} from "./order.js";
 import {approveWallet} from "./approval.js";
 import {sql} from "./db.js";
 import {clientIP} from "./misc.js";
+import TTLCache from "@isaacs/ttlcache";
 
 
 export function vaultAddress(chainId, owner, num=0) {
@@ -64,7 +65,13 @@ export async function loginAddress(socket, chainId, address) {
     }
 }
 
+const requestVaultCooldown = new TTLCache({ttl:5 * 1000, checkAgeOnGet: true})
+
 export async function requestVault(socket, chainId, owner, num) {
+    const key = [chainId, owner, num].join('|')
+    if (requestVaultCooldown.has(key))
+        return
+    requestVaultCooldown.set(key, true)
     const ipAddress = clientIP(socket)
     const time = new Date().toISOString();
     const query = `insert into vaultcreationrequest (chain, owner, num, time, ipaddr) values (${chainId}, '${owner}', ${num}, '${time}', '${ipAddress}') ON CONFLICT DO NOTHING`;

yarn.lock

@@ -26,6 +26,11 @@
   dependencies:
     minipass "^7.0.4"
 
+"@isaacs/ttlcache@^1.4.1":
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/@isaacs/ttlcache/-/ttlcache-1.4.1.tgz#21fb23db34e9b6220c6ba023a0118a2dd3461ea2"
+  integrity sha512-RQgQ4uQ+pLbqXfOmieB91ejmLwvSgv9nLx6sT6sD83s7umBypgg+OIBOBbEUiJXrfpnp9j0mRhYYdzp9uqq3lA==
+
 "@maxmind/geoip2-node@^5.0.0":
   version "5.0.0"
   resolved "https://registry.yarnpkg.com/@maxmind/geoip2-node/-/geoip2-node-5.0.0.tgz#56d5760ede1d9197ed401e2c8165d9a63853db3e"