excessive vault request squelching

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`;