add expire mthod to puter.kv

Author: jelveh

src/puter-js/src/modules/KV.js

@@ -180,6 +180,19 @@ class KV{
         return utils.make_driver_method(['key'], 'puter-kvstore', undefined, 'decr').call(this, options);
     }
 
+    expire = async(...args) => {
+        let options = {};
+        options.key = args[0];
+        options.seconds = args[1];
+        
+        // key size cannot be larger than MAX_KEY_SIZE
+        if(options.key.length > this.MAX_KEY_SIZE){
+            throw ({message: 'Key size cannot be larger than ' + this.MAX_KEY_SIZE, code: 'key_too_large'});
+        }
+
+        return utils.make_driver_method(['key'], 'puter-kvstore', undefined, 'expire').call(this, options);
+    }
+
     // resolves to 'true' on success, or rejects with an error on failure
     // will still resolve to 'true' if the key does not exist
     del = utils.make_driver_method(['key'], 'puter-kvstore', undefined, 'del', {